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// SPDX-License-Identifier: GPL-2.0 /* * Copyright IBM Corp. 2007, 2009 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>, * Frank Pavlic <fpavlic@de.ibm.com>, * Thomas Spatzier <tspat@de.ibm.com>, * Frank Blaschka <frank.blaschka@de.ibm.com> */ #define KMSG_COMPONENT "qeth" #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt #include <linux/compat.h> #include <linux/export.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/string.h> #include <linux/errno.h> #include <linux/kernel.h> #include <linux/log2.h> #include <linux/io.h> #include <linux/ip.h> #include <linux/tcp.h> #include <linux/mii.h> #include <linux/mm.h> #include <linux/kthread.h> #include <linux/slab.h> #include <linux/if_vlan.h> #include <linux/netdevice.h> #include <linux/netdev_features.h> #include <linux/rcutree.h> #include <linux/skbuff.h> #include <linux/vmalloc.h> #include <net/iucv/af_iucv.h> #include <net/dsfield.h> #include <net/sock.h> #include <asm/ebcdic.h> #include <asm/chpid.h> #include <asm/sysinfo.h> #include <asm/diag.h> #include <asm/cio.h> #include <asm/ccwdev.h> #include <asm/cpcmd.h> #include "qeth_core.h" struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = { /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */ /* N P A M L V H */ [QETH_DBF_SETUP] = {"qeth_setup", 8, 1, 8, 5, &debug_hex_ascii_view, NULL}, [QETH_DBF_MSG] = {"qeth_msg", 8, 1, 11 * sizeof(long), 3, &debug_sprintf_view, NULL}, [QETH_DBF_CTRL] = {"qeth_control", 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL}, }; EXPORT_SYMBOL_GPL(qeth_dbf); static struct kmem_cache *qeth_core_header_cache; static struct kmem_cache *qeth_qdio_outbuf_cache; static struct kmem_cache *qeth_qaob_cache; static struct device *qeth_core_root_dev; static struct dentry *qeth_debugfs_root; static struct lock_class_key qdio_out_skb_queue_key; static void qeth_issue_next_read_cb(struct qeth_card *card, struct qeth_cmd_buffer *iob, unsigned int data_length); static int qeth_qdio_establish(struct qeth_card *); static void qeth_free_qdio_queues(struct qeth_card *card); static const char *qeth_get_cardname(struct qeth_card *card) { if (IS_VM_NIC(card)) { switch (card->info.type) { case QETH_CARD_TYPE_OSD: return " Virtual NIC QDIO"; case QETH_CARD_TYPE_IQD: return " Virtual NIC Hiper"; case QETH_CARD_TYPE_OSM: return " Virtual NIC QDIO - OSM"; case QETH_CARD_TYPE_OSX: return " Virtual NIC QDIO - OSX"; default: return " unknown"; } } else { switch (card->info.type) { case QETH_CARD_TYPE_OSD: return " OSD Express"; case QETH_CARD_TYPE_IQD: return " HiperSockets"; case QETH_CARD_TYPE_OSM: return " OSM QDIO"; case QETH_CARD_TYPE_OSX: return " OSX QDIO"; default: return " unknown"; } } return " n/a"; } /* max length to be returned: 14 */ const char *qeth_get_cardname_short(struct qeth_card *card) { if (IS_VM_NIC(card)) { switch (card->info.type) { case QETH_CARD_TYPE_OSD: return "Virt.NIC QDIO"; case QETH_CARD_TYPE_IQD: return "Virt.NIC Hiper"; case QETH_CARD_TYPE_OSM: return "Virt.NIC OSM"; case QETH_CARD_TYPE_OSX: return "Virt.NIC OSX"; default: return "unknown"; } } else { switch (card->info.type) { case QETH_CARD_TYPE_OSD: switch (card->info.link_type) { case QETH_LINK_TYPE_FAST_ETH: return "OSD_100"; case QETH_LINK_TYPE_HSTR: return "HSTR"; case QETH_LINK_TYPE_GBIT_ETH: return "OSD_1000"; case QETH_LINK_TYPE_10GBIT_ETH: return "OSD_10GIG"; case QETH_LINK_TYPE_25GBIT_ETH: return "OSD_25GIG"; case QETH_LINK_TYPE_LANE_ETH100: return "OSD_FE_LANE"; case QETH_LINK_TYPE_LANE_TR: return "OSD_TR_LANE"; case QETH_LINK_TYPE_LANE_ETH1000: return "OSD_GbE_LANE"; case QETH_LINK_TYPE_LANE: return "OSD_ATM_LANE"; default: return "OSD_Express"; } case QETH_CARD_TYPE_IQD: return "HiperSockets"; case QETH_CARD_TYPE_OSM: return "OSM_1000"; case QETH_CARD_TYPE_OSX: return "OSX_10GIG"; default: return "unknown"; } } return "n/a"; } void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads, int clear_start_mask) { unsigned long flags; spin_lock_irqsave(&card->thread_mask_lock, flags); card->thread_allowed_mask = threads; if (clear_start_mask) card->thread_start_mask &= threads; spin_unlock_irqrestore(&card->thread_mask_lock, flags); wake_up(&card->wait_q); } EXPORT_SYMBOL_GPL(qeth_set_allowed_threads); int qeth_threads_running(struct qeth_card *card, unsigned long threads) { unsigned long flags; int rc = 0; spin_lock_irqsave(&card->thread_mask_lock, flags); rc = (card->thread_running_mask & threads); spin_unlock_irqrestore(&card->thread_mask_lock, flags); return rc; } EXPORT_SYMBOL_GPL(qeth_threads_running); static void qeth_clear_working_pool_list(struct qeth_card *card) { struct qeth_buffer_pool_entry *pool_entry, *tmp; struct qeth_qdio_q *queue = card->qdio.in_q; unsigned int i; QETH_CARD_TEXT(card, 5, "clwrklst"); list_for_each_entry_safe(pool_entry, tmp, &card->qdio.in_buf_pool.entry_list, list) list_del(&pool_entry->list); for (i = 0; i < ARRAY_SIZE(queue->bufs); i++) queue->bufs[i].pool_entry = NULL; } static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry) { unsigned int i; for (i = 0; i < ARRAY_SIZE(entry->elements); i++) { if (entry->elements[i]) __free_page(entry->elements[i]); } kfree(entry); } static void qeth_free_buffer_pool(struct qeth_card *card) { struct qeth_buffer_pool_entry *entry, *tmp; list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list, init_list) { list_del(&entry->init_list); qeth_free_pool_entry(entry); } } static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages) { struct qeth_buffer_pool_entry *entry; unsigned int i; entry = kzalloc(sizeof(*entry), GFP_KERNEL); if (!entry) return NULL; for (i = 0; i < pages; i++) { entry->elements[i] = __dev_alloc_page(GFP_KERNEL); if (!entry->elements[i]) { qeth_free_pool_entry(entry); return NULL; } } return entry; } static int qeth_alloc_buffer_pool(struct qeth_card *card) { unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card); unsigned int i; QETH_CARD_TEXT(card, 5, "alocpool"); for (i = 0; i < card->qdio.init_pool.buf_count; ++i) { struct qeth_buffer_pool_entry *entry; entry = qeth_alloc_pool_entry(buf_elements); if (!entry) { qeth_free_buffer_pool(card); return -ENOMEM; } list_add(&entry->init_list, &card->qdio.init_pool.entry_list); } return 0; } int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count) { unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card); struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool; struct qeth_buffer_pool_entry *entry, *tmp; int delta = count - pool->buf_count; LIST_HEAD(entries); QETH_CARD_TEXT(card, 2, "realcbp"); /* Defer until pool is allocated: */ if (list_empty(&pool->entry_list)) goto out; /* Remove entries from the pool: */ while (delta < 0) { entry = list_first_entry(&pool->entry_list, struct qeth_buffer_pool_entry, init_list); list_del(&entry->init_list); qeth_free_pool_entry(entry); delta++; } /* Allocate additional entries: */ while (delta > 0) { entry = qeth_alloc_pool_entry(buf_elements); if (!entry) { list_for_each_entry_safe(entry, tmp, &entries, init_list) { list_del(&entry->init_list); qeth_free_pool_entry(entry); } return -ENOMEM; } list_add(&entry->init_list, &entries); delta--; } list_splice(&entries, &pool->entry_list); out: card->qdio.in_buf_pool.buf_count = count; pool->buf_count = count; return 0; } EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool); static void qeth_free_qdio_queue(struct qeth_qdio_q *q) { if (!q) return; qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); kfree(q); } static struct qeth_qdio_q *qeth_alloc_qdio_queue(void) { struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL); int i; if (!q) return NULL; if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) { kfree(q); return NULL; } for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) q->bufs[i].buffer = q->qdio_bufs[i]; QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *)); return q; } static int qeth_cq_init(struct qeth_card *card) { int rc; if (card->options.cq == QETH_CQ_ENABLED) { QETH_CARD_TEXT(card, 2, "cqinit"); qdio_reset_buffers(card->qdio.c_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); card->qdio.c_q->next_buf_to_init = 127; rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 1, 0, 127); if (rc) { QETH_CARD_TEXT_(card, 2, "1err%d", rc); goto out; } } rc = 0; out: return rc; } static void qeth_free_cq(struct qeth_card *card) { if (card->qdio.c_q) { qeth_free_qdio_queue(card->qdio.c_q); card->qdio.c_q = NULL; } } static int qeth_alloc_cq(struct qeth_card *card) { if (card->options.cq == QETH_CQ_ENABLED) { QETH_CARD_TEXT(card, 2, "cqon"); if (!card->qdio.c_q) { card->qdio.c_q = qeth_alloc_qdio_queue(); if (!card->qdio.c_q) { dev_err(&card->gdev->dev, "Failed to create completion queue\n"); return -ENOMEM; } } } else { QETH_CARD_TEXT(card, 2, "nocq"); qeth_free_cq(card); } return 0; } static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15, int delayed) { enum iucv_tx_notify n; switch (sbalf15) { case 0: n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK; break; case 4: case 16: case 17: case 18: n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE : TX_NOTIFY_UNREACHABLE; break; default: n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR : TX_NOTIFY_GENERALERROR; break; } return n; } static void qeth_put_cmd(struct qeth_cmd_buffer *iob) { if (refcount_dec_and_test(&iob->ref_count)) { kfree(iob->data); kfree(iob); } } static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len, void *data) { ccw->cmd_code = cmd_code; ccw->flags = flags | CCW_FLAG_SLI; ccw->count = len; ccw->cda = virt_to_dma32(data); } static int __qeth_issue_next_read(struct qeth_card *card) { struct qeth_cmd_buffer *iob = card->read_cmd; struct qeth_channel *channel = iob->channel; struct ccw1 *ccw = __ccw_from_cmd(iob); int rc; QETH_CARD_TEXT(card, 5, "issnxrd"); if (channel->state != CH_STATE_UP) return -EIO; memset(iob->data, 0, iob->length); qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data); iob->callback = qeth_issue_next_read_cb; /* keep the cmd alive after completion: */ qeth_get_cmd(iob); QETH_CARD_TEXT(card, 6, "noirqpnd"); rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0); if (!rc) { channel->active_cmd = iob; } else { QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n", rc, CARD_DEVID(card)); qeth_unlock_channel(card, channel); qeth_put_cmd(iob); card->read_or_write_problem = 1; qeth_schedule_recovery(card); } return rc; } static int qeth_issue_next_read(struct qeth_card *card) { int ret; spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card))); ret = __qeth_issue_next_read(card); spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card))); return ret; } static void qeth_enqueue_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob) { spin_lock_irq(&card->lock); list_add_tail(&iob->list_entry, &card->cmd_waiter_list); spin_unlock_irq(&card->lock); } static void qeth_dequeue_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob) { spin_lock_irq(&card->lock); list_del(&iob->list_entry); spin_unlock_irq(&card->lock); } static void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason) { iob->rc = reason; complete(&iob->done); } static void qeth_flush_local_addrs4(struct qeth_card *card) { struct qeth_local_addr *addr; struct hlist_node *tmp; unsigned int i; spin_lock_irq(&card->local_addrs4_lock); hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) { hash_del_rcu(&addr->hnode); kfree_rcu(addr, rcu); } spin_unlock_irq(&card->local_addrs4_lock); } static void qeth_flush_local_addrs6(struct qeth_card *card) { struct qeth_local_addr *addr; struct hlist_node *tmp; unsigned int i; spin_lock_irq(&card->local_addrs6_lock); hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) { hash_del_rcu(&addr->hnode); kfree_rcu(addr, rcu); } spin_unlock_irq(&card->local_addrs6_lock); } static void qeth_flush_local_addrs(struct qeth_card *card) { qeth_flush_local_addrs4(card); qeth_flush_local_addrs6(card); } static void qeth_add_local_addrs4(struct qeth_card *card, struct qeth_ipacmd_local_addrs4 *cmd) { unsigned int i; if (cmd->addr_length != sizeof_field(struct qeth_ipacmd_local_addr4, addr)) { dev_err_ratelimited(&card->gdev->dev, "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n", cmd->addr_length); return; } spin_lock(&card->local_addrs4_lock); for (i = 0; i < cmd->count; i++) { unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr); struct qeth_local_addr *addr; bool duplicate = false; hash_for_each_possible(card->local_addrs4, addr, hnode, key) { if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) { duplicate = true; break; } } if (duplicate) continue; addr = kmalloc(sizeof(*addr), GFP_ATOMIC); if (!addr) { dev_err(&card->gdev->dev, "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n", &cmd->addrs[i].addr); continue; } ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr); hash_add_rcu(card->local_addrs4, &addr->hnode, key); } spin_unlock(&card->local_addrs4_lock); } static void qeth_add_local_addrs6(struct qeth_card *card, struct qeth_ipacmd_local_addrs6 *cmd) { unsigned int i; if (cmd->addr_length != sizeof_field(struct qeth_ipacmd_local_addr6, addr)) { dev_err_ratelimited(&card->gdev->dev, "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n", cmd->addr_length); return; } spin_lock(&card->local_addrs6_lock); for (i = 0; i < cmd->count; i++) { u32 key = ipv6_addr_hash(&cmd->addrs[i].addr); struct qeth_local_addr *addr; bool duplicate = false; hash_for_each_possible(card->local_addrs6, addr, hnode, key) { if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) { duplicate = true; break; } } if (duplicate) continue; addr = kmalloc(sizeof(*addr), GFP_ATOMIC); if (!addr) { dev_err(&card->gdev->dev, "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n", &cmd->addrs[i].addr); continue; } addr->addr = cmd->addrs[i].addr; hash_add_rcu(card->local_addrs6, &addr->hnode, key); } spin_unlock(&card->local_addrs6_lock); } static void qeth_del_local_addrs4(struct qeth_card *card, struct qeth_ipacmd_local_addrs4 *cmd) { unsigned int i; if (cmd->addr_length != sizeof_field(struct qeth_ipacmd_local_addr4, addr)) { dev_err_ratelimited(&card->gdev->dev, "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n", cmd->addr_length); return; } spin_lock(&card->local_addrs4_lock); for (i = 0; i < cmd->count; i++) { struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i]; unsigned int key = ipv4_addr_hash(addr->addr); struct qeth_local_addr *tmp; hash_for_each_possible(card->local_addrs4, tmp, hnode, key) { if (tmp->addr.s6_addr32[3] == addr->addr) { hash_del_rcu(&tmp->hnode); kfree_rcu(tmp, rcu); break; } } } spin_unlock(&card->local_addrs4_lock); } static void qeth_del_local_addrs6(struct qeth_card *card, struct qeth_ipacmd_local_addrs6 *cmd) { unsigned int i; if (cmd->addr_length != sizeof_field(struct qeth_ipacmd_local_addr6, addr)) { dev_err_ratelimited(&card->gdev->dev, "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n", cmd->addr_length); return; } spin_lock(&card->local_addrs6_lock); for (i = 0; i < cmd->count; i++) { struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i]; u32 key = ipv6_addr_hash(&addr->addr); struct qeth_local_addr *tmp; hash_for_each_possible(card->local_addrs6, tmp, hnode, key) { if (ipv6_addr_equal(&tmp->addr, &addr->addr)) { hash_del_rcu(&tmp->hnode); kfree_rcu(tmp, rcu); break; } } } spin_unlock(&card->local_addrs6_lock); } static bool qeth_next_hop_is_local_v4(struct qeth_card *card, struct sk_buff *skb) { struct qeth_local_addr *tmp; bool is_local = false; unsigned int key; __be32 next_hop; if (hash_empty(card->local_addrs4)) return false; rcu_read_lock(); next_hop = qeth_next_hop_v4_rcu(skb, qeth_dst_check_rcu(skb, htons(ETH_P_IP))); key = ipv4_addr_hash(next_hop); hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) { if (tmp->addr.s6_addr32[3] == next_hop) { is_local = true; break; } } rcu_read_unlock(); return is_local; } static bool qeth_next_hop_is_local_v6(struct qeth_card *card, struct sk_buff *skb) { struct qeth_local_addr *tmp; struct in6_addr *next_hop; bool is_local = false; u32 key; if (hash_empty(card->local_addrs6)) return false; rcu_read_lock(); next_hop = qeth_next_hop_v6_rcu(skb, qeth_dst_check_rcu(skb, htons(ETH_P_IPV6))); key = ipv6_addr_hash(next_hop); hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) { if (ipv6_addr_equal(&tmp->addr, next_hop)) { is_local = true; break; } } rcu_read_unlock(); return is_local; } static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v) { struct qeth_card *card = m->private; struct qeth_local_addr *tmp; unsigned int i; rcu_read_lock(); hash_for_each_rcu(card->local_addrs4, i, tmp, hnode) seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]); hash_for_each_rcu(card->local_addrs6, i, tmp, hnode) seq_printf(m, "%pI6c\n", &tmp->addr); rcu_read_unlock(); return 0; } DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr); static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc, struct qeth_card *card) { const char *ipa_name; int com = cmd->hdr.command; ipa_name = qeth_get_ipa_cmd_name(com); if (rc) QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n", ipa_name, com, CARD_DEVID(card), rc, qeth_get_ipa_msg(rc)); else QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n", ipa_name, com, CARD_DEVID(card)); } static void qeth_default_link_info(struct qeth_card *card) { struct qeth_link_info *link_info = &card->info.link_info; QETH_CARD_TEXT(card, 2, "dftlinfo"); link_info->duplex = DUPLEX_FULL; if (IS_IQD(card) || IS_VM_NIC(card)) { link_info->speed = SPEED_10000; link_info->port = PORT_FIBRE; link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT; } else { switch (card->info.link_type) { case QETH_LINK_TYPE_FAST_ETH: case QETH_LINK_TYPE_LANE_ETH100: link_info->speed = SPEED_100; link_info->port = PORT_TP; break; case QETH_LINK_TYPE_GBIT_ETH: case QETH_LINK_TYPE_LANE_ETH1000: link_info->speed = SPEED_1000; link_info->port = PORT_FIBRE; break; case QETH_LINK_TYPE_10GBIT_ETH: link_info->speed = SPEED_10000; link_info->port = PORT_FIBRE; break; case QETH_LINK_TYPE_25GBIT_ETH: link_info->speed = SPEED_25000; link_info->port = PORT_FIBRE; break; default: dev_info(&card->gdev->dev, "Unknown link type %x\n", card->info.link_type); link_info->speed = SPEED_UNKNOWN; link_info->port = PORT_OTHER; } link_info->link_mode = QETH_LINK_MODE_UNKNOWN; } } static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card, struct qeth_ipa_cmd *cmd) { QETH_CARD_TEXT(card, 5, "chkipad"); if (IS_IPA_REPLY(cmd)) { if (cmd->hdr.command != IPA_CMD_SET_DIAG_ASS) qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card); return cmd; } /* handle unsolicited event: */ switch (cmd->hdr.command) { case IPA_CMD_STOPLAN: if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) { dev_err(&card->gdev->dev, "Adjacent port of interface %s is no longer in reflective relay mode, trigger recovery\n", netdev_name(card->dev)); /* Set offline, then probably fail to set online: */ qeth_schedule_recovery(card); } else { /* stay online for subsequent STARTLAN */ dev_warn(&card->gdev->dev, "The link for interface %s on CHPID 0x%X failed\n", netdev_name(card->dev), card->info.chpid); qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card); netif_carrier_off(card->dev); qeth_default_link_info(card); } return NULL; case IPA_CMD_STARTLAN: dev_info(&card->gdev->dev, "The link for %s on CHPID 0x%X has been restored\n", netdev_name(card->dev), card->info.chpid); if (card->info.hwtrap) card->info.hwtrap = 2; qeth_schedule_recovery(card); return NULL; case IPA_CMD_SETBRIDGEPORT_IQD: case IPA_CMD_SETBRIDGEPORT_OSA: case IPA_CMD_ADDRESS_CHANGE_NOTIF: if (card->discipline->control_event_handler(card, cmd)) return cmd; return NULL; case IPA_CMD_REGISTER_LOCAL_ADDR: if (cmd->hdr.prot_version == QETH_PROT_IPV4) qeth_add_local_addrs4(card, &cmd->data.local_addrs4); else if (cmd->hdr.prot_version == QETH_PROT_IPV6) qeth_add_local_addrs6(card, &cmd->data.local_addrs6); QETH_CARD_TEXT(card, 3, "irla"); return NULL; case IPA_CMD_UNREGISTER_LOCAL_ADDR: if (cmd->hdr.prot_version == QETH_PROT_IPV4) qeth_del_local_addrs4(card, &cmd->data.local_addrs4); else if (cmd->hdr.prot_version == QETH_PROT_IPV6) qeth_del_local_addrs6(card, &cmd->data.local_addrs6); QETH_CARD_TEXT(card, 3, "urla"); return NULL; default: QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n"); return cmd; } } static void qeth_clear_ipacmd_list(struct qeth_card *card) { struct qeth_cmd_buffer *iob; unsigned long flags; QETH_CARD_TEXT(card, 4, "clipalst"); spin_lock_irqsave(&card->lock, flags); list_for_each_entry(iob, &card->cmd_waiter_list, list_entry) qeth_notify_cmd(iob, -ECANCELED); spin_unlock_irqrestore(&card->lock, flags); } static int qeth_check_idx_response(struct qeth_card *card, unsigned char *buffer) { QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN); if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) { QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n", buffer[4]); QETH_CARD_TEXT(card, 2, "ckidxres"); QETH_CARD_TEXT(card, 2, " idxterm"); QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]); if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT || buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) { dev_err(&card->gdev->dev, "The device does not support the configured transport mode\n"); return -EPROTONOSUPPORT; } return -EIO; } return 0; } static void qeth_release_buffer_cb(struct qeth_card *card, struct qeth_cmd_buffer *iob, unsigned int data_length) { qeth_put_cmd(iob); } static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc) { qeth_notify_cmd(iob, rc); qeth_put_cmd(iob); } static struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel, unsigned int length, unsigned int ccws, long timeout) { struct qeth_cmd_buffer *iob; if (length > QETH_BUFSIZE) return NULL; iob = kzalloc(sizeof(*iob), GFP_KERNEL); if (!iob) return NULL; iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1), GFP_KERNEL | GFP_DMA); if (!iob->data) { kfree(iob); return NULL; } init_completion(&iob->done); spin_lock_init(&iob->lock); refcount_set(&iob->ref_count, 1); iob->channel = channel; iob->timeout = timeout; iob->length = length; return iob; } static void qeth_issue_next_read_cb(struct qeth_card *card, struct qeth_cmd_buffer *iob, unsigned int data_length) { struct qeth_cmd_buffer *request = NULL; struct qeth_ipa_cmd *cmd = NULL; struct qeth_reply *reply = NULL; struct qeth_cmd_buffer *tmp; unsigned long flags; int rc = 0; QETH_CARD_TEXT(card, 4, "sndctlcb"); rc = qeth_check_idx_response(card, iob->data); switch (rc) { case 0: break; case -EIO: qeth_schedule_recovery(card); fallthrough; default: qeth_clear_ipacmd_list(card); goto err_idx; } cmd = __ipa_reply(iob); if (cmd) { cmd = qeth_check_ipa_data(card, cmd); if (!cmd) goto out; } /* match against pending cmd requests */ spin_lock_irqsave(&card->lock, flags); list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) { if (tmp->match && tmp->match(tmp, iob)) { request = tmp; /* take the object outside the lock */ qeth_get_cmd(request); break; } } spin_unlock_irqrestore(&card->lock, flags); if (!request) goto out; reply = &request->reply; if (!reply->callback) { rc = 0; goto no_callback; } spin_lock_irqsave(&request->lock, flags); if (request->rc) /* Bail out when the requestor has already left: */ rc = request->rc; else rc = reply->callback(card, reply, cmd ? (unsigned long)cmd : (unsigned long)iob); spin_unlock_irqrestore(&request->lock, flags); no_callback: if (rc <= 0) qeth_notify_cmd(request, rc); qeth_put_cmd(request); out: memcpy(&card->seqno.pdu_hdr_ack, QETH_PDU_HEADER_SEQ_NO(iob->data), QETH_SEQ_NO_LENGTH); __qeth_issue_next_read(card); err_idx: qeth_put_cmd(iob); } static int qeth_set_thread_start_bit(struct qeth_card *card, unsigned long thread) { unsigned long flags; int rc = 0; spin_lock_irqsave(&card->thread_mask_lock, flags); if (!(card->thread_allowed_mask & thread)) rc = -EPERM; else if (card->thread_start_mask & thread) rc = -EBUSY; else card->thread_start_mask |= thread; spin_unlock_irqrestore(&card->thread_mask_lock, flags); return rc; } static void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread) { unsigned long flags; spin_lock_irqsave(&card->thread_mask_lock, flags); card->thread_start_mask &= ~thread; spin_unlock_irqrestore(&card->thread_mask_lock, flags); wake_up(&card->wait_q); } static void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread) { unsigned long flags; spin_lock_irqsave(&card->thread_mask_lock, flags); card->thread_running_mask &= ~thread; spin_unlock_irqrestore(&card->thread_mask_lock, flags); wake_up_all(&card->wait_q); } static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread) { unsigned long flags; int rc = 0; spin_lock_irqsave(&card->thread_mask_lock, flags); if (card->thread_start_mask & thread) { if ((card->thread_allowed_mask & thread) && !(card->thread_running_mask & thread)) { rc = 1; card->thread_start_mask &= ~thread; card->thread_running_mask |= thread; } else rc = -EPERM; } spin_unlock_irqrestore(&card->thread_mask_lock, flags); return rc; } static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread) { int rc = 0; wait_event(card->wait_q, (rc = __qeth_do_run_thread(card, thread)) >= 0); return rc; } int qeth_schedule_recovery(struct qeth_card *card) { int rc; QETH_CARD_TEXT(card, 2, "startrec"); rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD); if (!rc) schedule_work(&card->kernel_thread_starter); return rc; } static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev, struct irb *irb) { int dstat, cstat; char *sense; sense = (char *) irb->ecw; cstat = irb->scsw.cmd.cstat; dstat = irb->scsw.cmd.dstat; if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK | SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK | SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) { QETH_CARD_TEXT(card, 2, "CGENCHK"); dev_warn(&cdev->dev, "The qeth device driver " "failed to recover an error on the device\n"); QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n", CCW_DEVID(cdev), dstat, cstat); print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET, 16, 1, irb, 64, 1); return -EIO; } if (dstat & DEV_STAT_UNIT_CHECK) { if (sense[SENSE_RESETTING_EVENT_BYTE] & SENSE_RESETTING_EVENT_FLAG) { QETH_CARD_TEXT(card, 2, "REVIND"); return -EIO; } if (sense[SENSE_COMMAND_REJECT_BYTE] & SENSE_COMMAND_REJECT_FLAG) { QETH_CARD_TEXT(card, 2, "CMDREJi"); return -EIO; } if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) { QETH_CARD_TEXT(card, 2, "AFFE"); return -EIO; } if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) { QETH_CARD_TEXT(card, 2, "ZEROSEN"); return 0; } QETH_CARD_TEXT(card, 2, "DGENCHK"); return -EIO; } return 0; } static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev, struct irb *irb) { if (!IS_ERR(irb)) return 0; switch (PTR_ERR(irb)) { case -EIO: QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n", CCW_DEVID(cdev)); QETH_CARD_TEXT(card, 2, "ckirberr"); QETH_CARD_TEXT_(card, 2, " rc%d", -EIO); return -EIO; case -ETIMEDOUT: dev_warn(&cdev->dev, "A hardware operation timed out" " on the device\n"); QETH_CARD_TEXT(card, 2, "ckirberr"); QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT); return -ETIMEDOUT; default: QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n", PTR_ERR(irb), CCW_DEVID(cdev)); QETH_CARD_TEXT(card, 2, "ckirberr"); QETH_CARD_TEXT(card, 2, " rc???"); return PTR_ERR(irb); } } /** * qeth_irq() - qeth interrupt handler * @cdev: ccw device * @intparm: expect pointer to iob * @irb: Interruption Response Block * * In the good path: * corresponding qeth channel is locked with last used iob as active_cmd. * But this function is also called for error interrupts. * * Caller ensures that: * Interrupts are disabled; ccw device lock is held; * */ static void qeth_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb) { int rc; int cstat, dstat; struct qeth_cmd_buffer *iob = NULL; struct ccwgroup_device *gdev; struct qeth_channel *channel; struct qeth_card *card; /* while we hold the ccwdev lock, this stays valid: */ gdev = dev_get_drvdata(&cdev->dev); card = dev_get_drvdata(&gdev->dev); QETH_CARD_TEXT(card, 5, "irq"); if (card->read.ccwdev == cdev) { channel = &card->read; QETH_CARD_TEXT(card, 5, "read"); } else if (card->write.ccwdev == cdev) { channel = &card->write; QETH_CARD_TEXT(card, 5, "write"); } else { channel = &card->data; QETH_CARD_TEXT(card, 5, "data"); } if (intparm == 0) { QETH_CARD_TEXT(card, 5, "irqunsol"); } else if ((addr_t)intparm != (addr_t)channel->active_cmd) { QETH_CARD_TEXT(card, 5, "irqunexp"); dev_err(&cdev->dev, "Received IRQ with intparm %lx, expected %px\n", intparm, channel->active_cmd); if (channel->active_cmd) qeth_cancel_cmd(channel->active_cmd, -EIO); } else { iob = (struct qeth_cmd_buffer *) (addr_t)intparm; } rc = qeth_check_irb_error(card, cdev, irb); if (rc) { /* IO was terminated, free its resources. */ qeth_unlock_channel(card, channel); if (iob) qeth_cancel_cmd(iob, rc); return; } if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) { channel->state = CH_STATE_STOPPED; wake_up(&card->wait_q); } if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) { channel->state = CH_STATE_HALTED; wake_up(&card->wait_q); } if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_HALT_FUNC))) { qeth_cancel_cmd(iob, -ECANCELED); iob = NULL; } cstat = irb->scsw.cmd.cstat; dstat = irb->scsw.cmd.dstat; if ((dstat & DEV_STAT_UNIT_EXCEP) || (dstat & DEV_STAT_UNIT_CHECK) || (cstat)) { if (irb->esw.esw0.erw.cons) { dev_warn(&channel->ccwdev->dev, "The qeth device driver failed to recover " "an error on the device\n"); QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n", CCW_DEVID(channel->ccwdev), cstat, dstat); print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1); print_hex_dump(KERN_WARNING, "qeth: sense data ", DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1); } rc = qeth_get_problem(card, cdev, irb); if (rc) { card->read_or_write_problem = 1; qeth_unlock_channel(card, channel); if (iob) qeth_cancel_cmd(iob, rc); qeth_clear_ipacmd_list(card); qeth_schedule_recovery(card); return; } } if (scsw_cmd_is_valid_cc(&irb->scsw) && irb->scsw.cmd.cc == 1 && iob) { /* channel command hasn't started: retry. * active_cmd is still set to last iob */ QETH_CARD_TEXT(card, 2, "irqcc1"); rc = ccw_device_start_timeout(cdev, __ccw_from_cmd(iob), (addr_t)iob, 0, 0, iob->timeout); if (rc) { QETH_DBF_MESSAGE(2, "ccw retry on %x failed, rc = %i\n", CARD_DEVID(card), rc); QETH_CARD_TEXT_(card, 2, " err%d", rc); qeth_unlock_channel(card, channel); qeth_cancel_cmd(iob, rc); } return; } qeth_unlock_channel(card, channel); if (iob) { /* sanity check: */ if (irb->scsw.cmd.count > iob->length) { qeth_cancel_cmd(iob, -EIO); return; } if (iob->callback) iob->callback(card, iob, iob->length - irb->scsw.cmd.count); } } static void qeth_notify_skbs(struct qeth_qdio_out_q *q, struct qeth_qdio_out_buffer *buf, enum iucv_tx_notify notification) { struct sk_buff *skb; skb_queue_walk(&buf->skb_list, skb) { struct sock *sk = skb->sk; QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification); QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb); if (sk && sk->sk_family == PF_IUCV) iucv_sk(sk)->sk_txnotify(sk, notification); } } static void qeth_tx_complete_buf(struct qeth_qdio_out_q *queue, struct qeth_qdio_out_buffer *buf, bool error, int budget) { struct sk_buff *skb; /* Empty buffer? */ if (buf->next_element_to_fill == 0) return; QETH_TXQ_STAT_INC(queue, bufs); QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill); if (error) { QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames); } else { QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames); QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes); } while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) { unsigned int bytes = qdisc_pkt_len(skb); bool is_tso = skb_is_gso(skb); unsigned int packets; packets = is_tso ? skb_shinfo(skb)->gso_segs : 1; if (!error) { if (skb->ip_summed == CHECKSUM_PARTIAL) QETH_TXQ_STAT_ADD(queue, skbs_csum, packets); if (skb_is_nonlinear(skb)) QETH_TXQ_STAT_INC(queue, skbs_sg); if (is_tso) { QETH_TXQ_STAT_INC(queue, skbs_tso); QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes); } } napi_consume_skb(skb, budget); } } static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue, struct qeth_qdio_out_buffer *buf, bool error, int budget) { int i; /* is PCI flag set on buffer? */ if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ) { atomic_dec(&queue->set_pci_flags_count); QETH_TXQ_STAT_INC(queue, completion_irq); } qeth_tx_complete_buf(queue, buf, error, budget); for (i = 0; i < queue->max_elements; ++i) { void *data = dma64_to_virt(buf->buffer->element[i].addr); if (__test_and_clear_bit(i, buf->from_kmem_cache) && data) kmem_cache_free(qeth_core_header_cache, data); } qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements); buf->next_element_to_fill = 0; buf->frames = 0; buf->bytes = 0; atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY); } static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf) { if (buf->aob) kmem_cache_free(qeth_qaob_cache, buf->aob); kmem_cache_free(qeth_qdio_outbuf_cache, buf); } static void qeth_tx_complete_pending_bufs(struct qeth_card *card, struct qeth_qdio_out_q *queue, bool drain, int budget) { struct qeth_qdio_out_buffer *buf, *tmp; list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) { struct qeth_qaob_priv1 *priv; struct qaob *aob = buf->aob; enum iucv_tx_notify notify; unsigned int i; priv = (struct qeth_qaob_priv1 *)&aob->user1; if (drain || READ_ONCE(priv->state) == QETH_QAOB_DONE) { QETH_CARD_TEXT(card, 5, "fp"); QETH_CARD_TEXT_(card, 5, "%lx", (long) buf); notify = drain ? TX_NOTIFY_GENERALERROR : qeth_compute_cq_notification(aob->aorc, 1); qeth_notify_skbs(queue, buf, notify); qeth_tx_complete_buf(queue, buf, drain, budget); for (i = 0; i < aob->sb_count && i < queue->max_elements; i++) { void *data = dma64_to_virt(aob->sba[i]); if (test_bit(i, buf->from_kmem_cache) && data) kmem_cache_free(qeth_core_header_cache, data); } list_del(&buf->list_entry); qeth_free_out_buf(buf); } } } static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free) { int j; qeth_tx_complete_pending_bufs(q->card, q, true, 0); for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) { if (!q->bufs[j]) continue; qeth_clear_output_buffer(q, q->bufs[j], true, 0); if (free) { qeth_free_out_buf(q->bufs[j]); q->bufs[j] = NULL; } } } static void qeth_drain_output_queues(struct qeth_card *card) { int i; QETH_CARD_TEXT(card, 2, "clearqdbf"); /* clear outbound buffers to free skbs */ for (i = 0; i < card->qdio.no_out_queues; ++i) { if (card->qdio.out_qs[i]) qeth_drain_output_queue(card->qdio.out_qs[i], false); } } static void qeth_osa_set_output_queues(struct qeth_card *card, bool single) { unsigned int max = single ? 1 : card->dev->num_tx_queues; if (card->qdio.no_out_queues == max) return; if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) qeth_free_qdio_queues(card); if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT) dev_info(&card->gdev->dev, "Priority Queueing not supported\n"); card->qdio.no_out_queues = max; } static int qeth_update_from_chp_desc(struct qeth_card *card) { struct ccw_device *ccwdev; struct channel_path_desc_fmt0 *chp_dsc; QETH_CARD_TEXT(card, 2, "chp_desc"); ccwdev = card->data.ccwdev; chp_dsc = ccw_device_get_chp_desc(ccwdev, 0); if (!chp_dsc) return -ENOMEM; card->info.func_level = 0x4100 + chp_dsc->desc; if (IS_OSD(card) || IS_OSX(card)) /* CHPP field bit 6 == 1 -> single queue */ qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02); kfree(chp_dsc); QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues); QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level); return 0; } static void qeth_init_qdio_info(struct qeth_card *card) { QETH_CARD_TEXT(card, 4, "intqdinf"); atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED); card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT; card->qdio.default_out_queue = QETH_DEFAULT_QUEUE; /* inbound */ card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT; if (IS_IQD(card)) card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT; else card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT; card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count; INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list); INIT_LIST_HEAD(&card->qdio.init_pool.entry_list); } static void qeth_set_initial_options(struct qeth_card *card) { card->options.route4.type = NO_ROUTER; card->options.route6.type = NO_ROUTER; card->options.isolation = ISOLATION_MODE_NONE; card->options.cq = QETH_CQ_DISABLED; card->options.layer = QETH_DISCIPLINE_UNDETERMINED; } static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread) { unsigned long flags; int rc = 0; spin_lock_irqsave(&card->thread_mask_lock, flags); QETH_CARD_TEXT_(card, 4, " %02x%02x%02x", (u8) card->thread_start_mask, (u8) card->thread_allowed_mask, (u8) card->thread_running_mask); rc = (card->thread_start_mask & thread); spin_unlock_irqrestore(&card->thread_mask_lock, flags); return rc; } static int qeth_do_reset(void *data); static void qeth_start_kernel_thread(struct work_struct *work) { struct task_struct *ts; struct qeth_card *card = container_of(work, struct qeth_card, kernel_thread_starter); QETH_CARD_TEXT(card, 2, "strthrd"); if (card->read.state != CH_STATE_UP && card->write.state != CH_STATE_UP) return; if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) { ts = kthread_run(qeth_do_reset, card, "qeth_recover"); if (IS_ERR(ts)) { qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD); qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD); } } } static void qeth_buffer_reclaim_work(struct work_struct *); static void qeth_setup_card(struct qeth_card *card) { QETH_CARD_TEXT(card, 2, "setupcrd"); card->info.type = CARD_RDEV(card)->id.driver_info; card->state = CARD_STATE_DOWN; spin_lock_init(&card->lock); spin_lock_init(&card->thread_mask_lock); mutex_init(&card->conf_mutex); mutex_init(&card->discipline_mutex); INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread); INIT_LIST_HEAD(&card->cmd_waiter_list); init_waitqueue_head(&card->wait_q); qeth_set_initial_options(card); /* IP address takeover */ INIT_LIST_HEAD(&card->ipato.entries); qeth_init_qdio_info(card); INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work); hash_init(card->rx_mode_addrs); hash_init(card->local_addrs4); hash_init(card->local_addrs6); spin_lock_init(&card->local_addrs4_lock); spin_lock_init(&card->local_addrs6_lock); } static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr) { struct qeth_card *card = container_of(slr, struct qeth_card, qeth_service_level); if (card->info.mcl_level[0]) seq_printf(m, "qeth: %s firmware level %s\n", CARD_BUS_ID(card), card->info.mcl_level); } static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev) { struct qeth_card *card; QETH_DBF_TEXT(SETUP, 2, "alloccrd"); card = kzalloc(sizeof(*card), GFP_KERNEL); if (!card) goto out; QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *)); card->gdev = gdev; dev_set_drvdata(&gdev->dev, card); CARD_RDEV(card) = gdev->cdev[0]; CARD_WDEV(card) = gdev->cdev[1]; CARD_DDEV(card) = gdev->cdev[2]; card->event_wq = alloc_ordered_workqueue("%s_event", 0, dev_name(&gdev->dev)); if (!card->event_wq) goto out_wq; card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0); if (!card->read_cmd) goto out_read_cmd; card->debugfs = debugfs_create_dir(dev_name(&gdev->dev), qeth_debugfs_root); debugfs_create_file("local_addrs", 0400, card->debugfs, card, &qeth_debugfs_local_addr_fops); card->qeth_service_level.seq_print = qeth_core_sl_print; register_service_level(&card->qeth_service_level); return card; out_read_cmd: destroy_workqueue(card->event_wq); out_wq: dev_set_drvdata(&gdev->dev, NULL); kfree(card); out: return NULL; } static int qeth_clear_channel(struct qeth_card *card, struct qeth_channel *channel) { int rc; QETH_CARD_TEXT(card, 3, "clearch"); spin_lock_irq(get_ccwdev_lock(channel->ccwdev)); rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd); spin_unlock_irq(get_ccwdev_lock(channel->ccwdev)); if (rc) return rc; rc = wait_event_interruptible_timeout(card->wait_q, channel->state == CH_STATE_STOPPED, QETH_TIMEOUT); if (rc == -ERESTARTSYS) return rc; if (channel->state != CH_STATE_STOPPED) return -ETIME; channel->state = CH_STATE_DOWN; return 0; } static int qeth_halt_channel(struct qeth_card *card, struct qeth_channel *channel) { int rc; QETH_CARD_TEXT(card, 3, "haltch"); spin_lock_irq(get_ccwdev_lock(channel->ccwdev)); rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd); spin_unlock_irq(get_ccwdev_lock(channel->ccwdev)); if (rc) return rc; rc = wait_event_interruptible_timeout(card->wait_q, channel->state == CH_STATE_HALTED, QETH_TIMEOUT); if (rc == -ERESTARTSYS) return rc; if (channel->state != CH_STATE_HALTED) return -ETIME; return 0; } static int qeth_stop_channel(struct qeth_channel *channel) { struct ccw_device *cdev = channel->ccwdev; int rc; rc = ccw_device_set_offline(cdev); spin_lock_irq(get_ccwdev_lock(cdev)); if (channel->active_cmd) dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n", channel->active_cmd); cdev->handler = NULL; spin_unlock_irq(get_ccwdev_lock(cdev)); return rc; } static int qeth_start_channel(struct qeth_channel *channel) { struct ccw_device *cdev = channel->ccwdev; int rc; channel->state = CH_STATE_DOWN; xchg(&channel->active_cmd, NULL); spin_lock_irq(get_ccwdev_lock(cdev)); cdev->handler = qeth_irq; spin_unlock_irq(get_ccwdev_lock(cdev)); rc = ccw_device_set_online(cdev); if (rc) goto err; return 0; err: spin_lock_irq(get_ccwdev_lock(cdev)); cdev->handler = NULL; spin_unlock_irq(get_ccwdev_lock(cdev)); return rc; } static int qeth_halt_channels(struct qeth_card *card) { int rc1 = 0, rc2 = 0, rc3 = 0; QETH_CARD_TEXT(card, 3, "haltchs"); rc1 = qeth_halt_channel(card, &card->read); rc2 = qeth_halt_channel(card, &card->write); rc3 = qeth_halt_channel(card, &card->data); if (rc1) return rc1; if (rc2) return rc2; return rc3; } static int qeth_clear_channels(struct qeth_card *card) { int rc1 = 0, rc2 = 0, rc3 = 0; QETH_CARD_TEXT(card, 3, "clearchs"); rc1 = qeth_clear_channel(card, &card->read); rc2 = qeth_clear_channel(card, &card->write); rc3 = qeth_clear_channel(card, &card->data); if (rc1) return rc1; if (rc2) return rc2; return rc3; } static int qeth_clear_halt_card(struct qeth_card *card, int halt) { int rc = 0; QETH_CARD_TEXT(card, 3, "clhacrd"); if (halt) rc = qeth_halt_channels(card); if (rc) return rc; return qeth_clear_channels(card); } static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt) { int rc = 0; QETH_CARD_TEXT(card, 3, "qdioclr"); switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED, QETH_QDIO_CLEANING)) { case QETH_QDIO_ESTABLISHED: if (IS_IQD(card)) rc = qdio_shutdown(CARD_DDEV(card), QDIO_FLAG_CLEANUP_USING_HALT); else rc = qdio_shutdown(CARD_DDEV(card), QDIO_FLAG_CLEANUP_USING_CLEAR); if (rc) QETH_CARD_TEXT_(card, 3, "1err%d", rc); atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED); break; case QETH_QDIO_CLEANING: return rc; default: break; } rc = qeth_clear_halt_card(card, use_halt); if (rc) QETH_CARD_TEXT_(card, 3, "2err%d", rc); return rc; } static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card) { enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED; struct diag26c_vnic_resp *response = NULL; struct diag26c_vnic_req *request = NULL; struct ccw_dev_id id; char userid[80]; int rc = 0; QETH_CARD_TEXT(card, 2, "vmlayer"); cpcmd("QUERY USERID", userid, sizeof(userid), &rc); if (rc) goto out; request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA); response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA); if (!request || !response) { rc = -ENOMEM; goto out; } ccw_device_get_id(CARD_RDEV(card), &id); request->resp_buf_len = sizeof(*response); request->resp_version = DIAG26C_VERSION6_VM65918; request->req_format = DIAG26C_VNIC_INFO; ASCEBC(userid, 8); memcpy(&request->sys_name, userid, 8); request->devno = id.devno; QETH_DBF_HEX(CTRL, 2, request, sizeof(*request)); rc = diag26c(request, response, DIAG26C_PORT_VNIC); QETH_DBF_HEX(CTRL, 2, request, sizeof(*request)); if (rc) goto out; QETH_DBF_HEX(CTRL, 2, response, sizeof(*response)); if (request->resp_buf_len < sizeof(*response) || response->version != request->resp_version) { rc = -EIO; goto out; } if (response->protocol == VNIC_INFO_PROT_L2) disc = QETH_DISCIPLINE_LAYER2; else if (response->protocol == VNIC_INFO_PROT_L3) disc = QETH_DISCIPLINE_LAYER3; out: kfree(response); kfree(request); if (rc) QETH_CARD_TEXT_(card, 2, "err%x", rc); return disc; } /* Determine whether the device requires a specific layer discipline */ static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card) { enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED; if (IS_OSM(card)) disc = QETH_DISCIPLINE_LAYER2; else if (IS_VM_NIC(card)) disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 : qeth_vm_detect_layer(card); switch (disc) { case QETH_DISCIPLINE_LAYER2: QETH_CARD_TEXT(card, 3, "force l2"); break; case QETH_DISCIPLINE_LAYER3: QETH_CARD_TEXT(card, 3, "force l3"); break; default: QETH_CARD_TEXT(card, 3, "force no"); } return disc; } static void qeth_set_blkt_defaults(struct qeth_card *card) { QETH_CARD_TEXT(card, 2, "cfgblkt"); if (card->info.use_v1_blkt) { card->info.blkt.time_total = 0; card->info.blkt.inter_packet = 0; card->info.blkt.inter_packet_jumbo = 0; } else { card->info.blkt.time_total = 250; card->info.blkt.inter_packet = 5; card->info.blkt.inter_packet_jumbo = 15; } } static void qeth_idx_init(struct qeth_card *card) { memset(&card->seqno, 0, sizeof(card->seqno)); card->token.issuer_rm_w = 0x00010103UL; card->token.cm_filter_w = 0x00010108UL; card->token.cm_connection_w = 0x0001010aUL; card->token.ulp_filter_w = 0x0001010bUL; card->token.ulp_connection_w = 0x0001010dUL; switch (card->info.type) { case QETH_CARD_TYPE_IQD: card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD; break; case QETH_CARD_TYPE_OSD: card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD; break; default: break; } } static void qeth_idx_finalize_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob) { memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH); if (iob->channel == &card->write) card->seqno.trans_hdr++; } static int qeth_peer_func_level(int level) { if ((level & 0xff) == 8) return (level & 0xff) + 0x400; if (((level >> 8) & 3) == 1) return (level & 0xff) + 0x200; return level; } static void qeth_mpc_finalize_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob) { qeth_idx_finalize_cmd(card, iob); memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data), &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH); card->seqno.pdu_hdr++; memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data), &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH); iob->callback = qeth_release_buffer_cb; } static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob, struct qeth_cmd_buffer *reply) { /* MPC cmds are issued strictly in sequence. */ return !IS_IPA(reply->data); } static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card, const void *data, unsigned int data_length) { struct qeth_cmd_buffer *iob; iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT); if (!iob) return NULL; memcpy(iob->data, data, data_length); qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length, iob->data); iob->finalize = qeth_mpc_finalize_cmd; iob->match = qeth_mpc_match_reply; return iob; } /** * qeth_send_control_data() - send control command to the card * @card: qeth_card structure pointer * @iob: qeth_cmd_buffer pointer * @reply_cb: callback function pointer * cb_card: pointer to the qeth_card structure * cb_reply: pointer to the qeth_reply structure * cb_cmd: pointer to the original iob for non-IPA * commands, or to the qeth_ipa_cmd structure * for the IPA commands. * @reply_param: private pointer passed to the callback * * Callback function gets called one or more times, with cb_cmd * pointing to the response returned by the hardware. Callback * function must return * > 0 if more reply blocks are expected, * 0 if the last or only reply block is received, and * < 0 on error. * Callback function can get the value of the reply_param pointer from the * field 'param' of the structure qeth_reply. */ static int qeth_send_control_data(struct qeth_card *card, struct qeth_cmd_buffer *iob, int (*reply_cb)(struct qeth_card *cb_card, struct qeth_reply *cb_reply, unsigned long cb_cmd), void *reply_param) { struct qeth_channel *channel = iob->channel; struct qeth_reply *reply = &iob->reply; long timeout = iob->timeout; int rc; QETH_CARD_TEXT(card, 2, "sendctl"); reply->callback = reply_cb; reply->param = reply_param; timeout = wait_event_interruptible_timeout(card->wait_q, qeth_trylock_channel(channel, iob), timeout); if (timeout <= 0) { qeth_put_cmd(iob); return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME; } if (iob->finalize) iob->finalize(card, iob); QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN)); qeth_enqueue_cmd(card, iob); /* This pairs with iob->callback, and keeps the iob alive after IO: */ qeth_get_cmd(iob); QETH_CARD_TEXT(card, 6, "noirqpnd"); spin_lock_irq(get_ccwdev_lock(channel->ccwdev)); rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob), (addr_t) iob, 0, 0, timeout); spin_unlock_irq(get_ccwdev_lock(channel->ccwdev)); if (rc) { QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n", CARD_DEVID(card), rc); QETH_CARD_TEXT_(card, 2, " err%d", rc); qeth_dequeue_cmd(card, iob); qeth_put_cmd(iob); qeth_unlock_channel(card, channel); goto out; } timeout = wait_for_completion_interruptible_timeout(&iob->done, timeout); if (timeout <= 0) rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME; qeth_dequeue_cmd(card, iob); if (reply_cb) { /* Wait until the callback for a late reply has completed: */ spin_lock_irq(&iob->lock); if (rc) /* Zap any callback that's still pending: */ iob->rc = rc; spin_unlock_irq(&iob->lock); } if (!rc) rc = iob->rc; out: qeth_put_cmd(iob); return rc; } struct qeth_node_desc { struct node_descriptor nd1; struct node_descriptor nd2; struct node_descriptor nd3; }; static void qeth_read_conf_data_cb(struct qeth_card *card, struct qeth_cmd_buffer *iob, unsigned int data_length) { struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data; int rc = 0; u8 *tag; QETH_CARD_TEXT(card, 2, "cfgunit"); if (data_length < sizeof(*nd)) { rc = -EINVAL; goto out; } card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] && nd->nd1.plant[1] == _ascebc['M']; tag = (u8 *)&nd->nd1.tag; card->info.chpid = tag[0]; card->info.unit_addr2 = tag[1]; tag = (u8 *)&nd->nd2.tag; card->info.cula = tag[1]; card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 && nd->nd3.model[1] == 0xF0 && nd->nd3.model[2] >= 0xF1 && nd->nd3.model[2] <= 0xF4; out: qeth_notify_cmd(iob, rc); qeth_put_cmd(iob); } static int qeth_read_conf_data(struct qeth_card *card) { struct qeth_channel *channel = &card->data; struct qeth_cmd_buffer *iob; struct ciw *ciw; /* scan for RCD command in extended SenseID data */ ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD); if (!ciw || ciw->cmd == 0) return -EOPNOTSUPP; if (ciw->count < sizeof(struct qeth_node_desc)) return -EINVAL; iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT); if (!iob) return -ENOMEM; iob->callback = qeth_read_conf_data_cb; qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length, iob->data); return qeth_send_control_data(card, iob, NULL, NULL); } static int qeth_idx_check_activate_response(struct qeth_card *card, struct qeth_channel *channel, struct qeth_cmd_buffer *iob) { int rc; rc = qeth_check_idx_response(card, iob->data); if (rc) return rc; if (QETH_IS_IDX_ACT_POS_REPLY(iob->data)) return 0; /* negative reply: */ QETH_CARD_TEXT_(card, 2, "idxneg%c", QETH_IDX_ACT_CAUSE_CODE(iob->data)); switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) { case QETH_IDX_ACT_ERR_EXCL: dev_err(&channel->ccwdev->dev, "The adapter is used exclusively by another host\n"); return -EBUSY; case QETH_IDX_ACT_ERR_AUTH: case QETH_IDX_ACT_ERR_AUTH_USER: dev_err(&channel->ccwdev->dev, "Setting the device online failed because of insufficient authorization\n"); return -EPERM; default: QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n", CCW_DEVID(channel->ccwdev)); return -EIO; } } static void qeth_idx_activate_read_channel_cb(struct qeth_card *card, struct qeth_cmd_buffer *iob, unsigned int data_length) { struct qeth_channel *channel = iob->channel; u16 peer_level; int rc; QETH_CARD_TEXT(card, 2, "idxrdcb"); rc = qeth_idx_check_activate_response(card, channel, iob); if (rc) goto out; memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2); if (peer_level != qeth_peer_func_level(card->info.func_level)) { QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, recei CCW_DEVID(channel->ccwdev), card->info.func_level, peer_level); rc = -EINVAL; goto out; } memcpy(&card->token.issuer_rm_r, QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data), QETH_MPC_TOKEN_LENGTH); memcpy(&card->info.mcl_level[0], QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH); out: qeth_notify_cmd(iob, rc); qeth_put_cmd(iob); } static void qeth_idx_activate_write_channel_cb(struct qeth_card *card, struct qeth_cmd_buffer *iob, unsigned int data_length) { struct qeth_channel *channel = iob->channel; u16 peer_level; int rc; QETH_CARD_TEXT(card, 2, "idxwrcb"); rc = qeth_idx_check_activate_response(card, channel, iob); if (rc) goto out; memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2); if ((peer_level & ~0x0100) != qeth_peer_func_level(card->info.func_level)) { QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, recei CCW_DEVID(channel->ccwdev), card->info.func_level, peer_level); rc = -EINVAL; } out: qeth_notify_cmd(iob, rc); qeth_put_cmd(iob); } static void qeth_idx_setup_activate_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob) { u16 addr = (card->info.cula << 8) + card->info.unit_addr2; u8 port = ((u8)card->dev->dev_port) | 0x80; struct ccw1 *ccw = __ccw_from_cmd(iob); qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVA iob->data); qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data); iob->finalize = qeth_idx_finalize_cmd; port |= QETH_IDX_ACT_INVAL_FRAME; memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1); memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data), &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH); memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data), &card->info.func_level, 2); memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2); memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2); } static int qeth_idx_activate_read_channel(struct qeth_card *card) { struct qeth_channel *channel = &card->read; struct qeth_cmd_buffer *iob; int rc; QETH_CARD_TEXT(card, 2, "idxread"); iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT); if (!iob) return -ENOMEM; memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE); qeth_idx_setup_activate_cmd(card, iob); iob->callback = qeth_idx_activate_read_channel_cb; rc = qeth_send_control_data(card, iob, NULL, NULL); if (rc) return rc; channel->state = CH_STATE_UP; return 0; } static int qeth_idx_activate_write_channel(struct qeth_card *card) { struct qeth_channel *channel = &card->write; struct qeth_cmd_buffer *iob; int rc; QETH_CARD_TEXT(card, 2, "idxwrite"); iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT); if (!iob) return -ENOMEM; memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE); qeth_idx_setup_activate_cmd(card, iob); iob->callback = qeth_idx_activate_write_channel_cb; rc = qeth_send_control_data(card, iob, NULL, NULL); if (rc) return rc; channel->state = CH_STATE_UP; return 0; } static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_cmd_buffer *iob; QETH_CARD_TEXT(card, 2, "cmenblcb"); iob = (struct qeth_cmd_buffer *) data; memcpy(&card->token.cm_filter_r, QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data), QETH_MPC_TOKEN_LENGTH); return 0; } static int qeth_cm_enable(struct qeth_card *card) { struct qeth_cmd_buffer *iob; QETH_CARD_TEXT(card, 2, "cmenable"); iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE); if (!iob) return -ENOMEM; memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data), &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH); memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data), &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH); return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL); } static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_cmd_buffer *iob; QETH_CARD_TEXT(card, 2, "cmsetpcb"); iob = (struct qeth_cmd_buffer *) data; memcpy(&card->token.cm_connection_r, QETH_CM_SETUP_RESP_DEST_ADDR(iob->data), QETH_MPC_TOKEN_LENGTH); return 0; } static int qeth_cm_setup(struct qeth_card *card) { struct qeth_cmd_buffer *iob; QETH_CARD_TEXT(card, 2, "cmsetup"); iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE); if (!iob) return -ENOMEM; memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data), &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH); memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data), &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH); memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data), &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH); return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL); } static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type) { if (link_type == QETH_LINK_TYPE_LANE_TR || link_type == QETH_LINK_TYPE_HSTR) { dev_err(&card->gdev->dev, "Unsupported Token Ring device\n"); return false; } return true; } static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu) { struct net_device *dev = card->dev; unsigned int new_mtu; if (!max_mtu) { /* IQD needs accurate max MTU to set up its RX buffers: */ if (IS_IQD(card)) return -EINVAL; /* tolerate quirky HW: */ max_mtu = ETH_MAX_MTU; } rtnl_lock(); if (IS_IQD(card)) { /* move any device with default MTU to new max MTU: */ new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu; /* adjust RX buffer size to new max MTU: */ card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE; if (dev->max_mtu && dev->max_mtu != max_mtu) qeth_free_qdio_queues(card); } else { if (dev->mtu) new_mtu = dev->mtu; /* default MTUs for first setup: */ else if (IS_LAYER2(card)) new_mtu = ETH_DATA_LEN; else new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */ } dev->max_mtu = max_mtu; dev->mtu = min(new_mtu, max_mtu); rtnl_unlock(); return 0; } static int qeth_get_mtu_outof_framesize(int framesize) { switch (framesize) { case 0x4000: return 8192; case 0x6000: return 16384; case 0xa000: return 32768; case 0xffff: return 57344; default: return 0; } } static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { __u16 mtu, framesize; __u16 len; struct qeth_cmd_buffer *iob; u8 link_type = 0; QETH_CARD_TEXT(card, 2, "ulpenacb"); iob = (struct qeth_cmd_buffer *) data; memcpy(&card->token.ulp_filter_r, QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data), QETH_MPC_TOKEN_LENGTH); if (IS_IQD(card)) { memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2); mtu = qeth_get_mtu_outof_framesize(framesize); } else { mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data); } *(u16 *)reply->param = mtu; memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2); if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) { memcpy(&link_type, QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1); if (!qeth_is_supported_link_type(card, link_type)) return -EPROTONOSUPPORT; } card->info.link_type = link_type; QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type); return 0; } static u8 qeth_mpc_select_prot_type(struct qeth_card *card) { return IS_LAYER2(card) ? QETH_MPC_PROT_L2 : QETH_MPC_PROT_L3; } static int qeth_ulp_enable(struct qeth_card *card) { u8 prot_type = qeth_mpc_select_prot_type(card); struct qeth_cmd_buffer *iob; u16 max_mtu; int rc; QETH_CARD_TEXT(card, 2, "ulpenabl"); iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE); if (!iob) return -ENOMEM; *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port; memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1); memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data), &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH); memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data), &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH); rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu); if (rc) return rc; return qeth_update_max_mtu(card, max_mtu); } static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_cmd_buffer *iob; QETH_CARD_TEXT(card, 2, "ulpstpcb"); iob = (struct qeth_cmd_buffer *) data; memcpy(&card->token.ulp_connection_r, QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data), QETH_MPC_TOKEN_LENGTH); if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data), 3)) { QETH_CARD_TEXT(card, 2, "olmlimit"); dev_err(&card->gdev->dev, "A connection could not be " "established because of an OLM limit\n"); return -EMLINK; } return 0; } static int qeth_ulp_setup(struct qeth_card *card) { __u16 temp; struct qeth_cmd_buffer *iob; QETH_CARD_TEXT(card, 2, "ulpsetup"); iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE); if (!iob) return -ENOMEM; memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data), &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH); memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data), &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH); memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data), &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH); memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2); temp = (card->info.cula << 8) + card->info.unit_addr2; memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2); return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL); } static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx, gfp_t gfp) { struct qeth_qdio_out_buffer *newbuf; newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp); if (!newbuf) return -ENOMEM; newbuf->buffer = q->qdio_bufs[bidx]; skb_queue_head_init(&newbuf->skb_list); lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key); atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY); q->bufs[bidx] = newbuf; return 0; } static void qeth_free_output_queue(struct qeth_qdio_out_q *q) { if (!q) return; qeth_drain_output_queue(q, true); qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); kfree(q); } static struct qeth_qdio_out_q *qeth_alloc_output_queue(void) { struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL); unsigned int i; if (!q) return NULL; if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) goto err_qdio_bufs; for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) { if (qeth_alloc_out_buf(q, i, GFP_KERNEL)) goto err_out_bufs; } return q; err_out_bufs: while (i > 0) qeth_free_out_buf(q->bufs[--i]); qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); err_qdio_bufs: kfree(q); return NULL; } static void qeth_tx_completion_timer(struct timer_list *timer) { struct qeth_qdio_out_q *queue = timer_container_of(queue, timer, timer); napi_schedule(&queue->napi); QETH_TXQ_STAT_INC(queue, completion_timer); } static int qeth_alloc_qdio_queues(struct qeth_card *card) { unsigned int i; QETH_CARD_TEXT(card, 2, "allcqdbf"); /* completion */ if (qeth_alloc_cq(card)) goto out_err; if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED, QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED) return 0; /* inbound buffer pool */ if (qeth_alloc_buffer_pool(card)) goto out_buffer_pool; /* outbound */ for (i = 0; i < card->qdio.no_out_queues; ++i) { struct qeth_qdio_out_q *queue; queue = qeth_alloc_output_queue(); if (!queue) goto out_freeoutq; QETH_CARD_TEXT_(card, 2, "outq %i", i); QETH_CARD_HEX(card, 2, &queue, sizeof(void *)); card->qdio.out_qs[i] = queue; queue->card = card; queue->queue_no = i; INIT_LIST_HEAD(&queue->pending_bufs); spin_lock_init(&queue->lock); timer_setup(&queue->timer, qeth_tx_completion_timer, 0); if (IS_IQD(card)) { queue->coalesce_usecs = QETH_TX_COALESCE_USECS; queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES; queue->rescan_usecs = QETH_TX_TIMER_USECS; } else { queue->coalesce_usecs = USEC_PER_SEC; queue->max_coalesced_frames = 0; queue->rescan_usecs = 10 * USEC_PER_SEC; } queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT; } return 0; out_freeoutq: while (i > 0) { qeth_free_output_queue(card->qdio.out_qs[--i]); card->qdio.out_qs[i] = NULL; } qeth_free_buffer_pool(card); out_buffer_pool: atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED); qeth_free_cq(card); out_err: return -ENOMEM; } static void qeth_free_qdio_queues(struct qeth_card *card) { int i, j; qeth_free_cq(card); if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) == QETH_QDIO_UNINITIALIZED) return; for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) { if (card->qdio.in_q->bufs[j].rx_skb) { consume_skb(card->qdio.in_q->bufs[j].rx_skb); card->qdio.in_q->bufs[j].rx_skb = NULL; } } /* inbound buffer pool */ qeth_free_buffer_pool(card); /* free outbound qdio_qs */ for (i = 0; i < card->qdio.no_out_queues; i++) { qeth_free_output_queue(card->qdio.out_qs[i]); card->qdio.out_qs[i] = NULL; } } static void qeth_fill_qib_parms(struct qeth_card *card, struct qeth_qib_parms *parms) { struct qeth_qdio_out_q *queue; unsigned int i; parms->pcit_magic[0] = 'P'; parms->pcit_magic[1] = 'C'; parms->pcit_magic[2] = 'I'; parms->pcit_magic[3] = 'T'; ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic)); parms->pcit_a = QETH_PCI_THRESHOLD_A(card); parms->pcit_b = QETH_PCI_THRESHOLD_B(card); parms->pcit_c = QETH_PCI_TIMER_VALUE(card); parms->blkt_magic[0] = 'B'; parms->blkt_magic[1] = 'L'; parms->blkt_magic[2] = 'K'; parms->blkt_magic[3] = 'T'; ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic)); parms->blkt_total = card->info.blkt.time_total; parms->blkt_inter_packet = card->info.blkt.inter_packet; parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo; /* Prio-queueing implicitly uses the default priorities: */ if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1) return; parms->pque_magic[0] = 'P'; parms->pque_magic[1] = 'Q'; parms->pque_magic[2] = 'U'; parms->pque_magic[3] = 'E'; ASCEBC(parms->pque_magic, sizeof(parms->pque_magic)); parms->pque_order = QETH_QIB_PQUE_ORDER_RR; parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL; qeth_for_each_output_queue(card, queue, i) parms->pque_priority[i] = queue->priority; } static int qeth_qdio_activate(struct qeth_card *card) { QETH_CARD_TEXT(card, 3, "qdioact"); return qdio_activate(CARD_DDEV(card)); } static int qeth_dm_act(struct qeth_card *card) { struct qeth_cmd_buffer *iob; QETH_CARD_TEXT(card, 2, "dmact"); iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE); if (!iob) return -ENOMEM; memcpy(QETH_DM_ACT_DEST_ADDR(iob->data), &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH); memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data), &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH); return qeth_send_control_data(card, iob, NULL, NULL); } static int qeth_mpc_initialize(struct qeth_card *card) { int rc; QETH_CARD_TEXT(card, 2, "mpcinit"); rc = qeth_issue_next_read(card); if (rc) { QETH_CARD_TEXT_(card, 2, "1err%d", rc); return rc; } rc = qeth_cm_enable(card); if (rc) { QETH_CARD_TEXT_(card, 2, "2err%d", rc); return rc; } rc = qeth_cm_setup(card); if (rc) { QETH_CARD_TEXT_(card, 2, "3err%d", rc); return rc; } rc = qeth_ulp_enable(card); if (rc) { QETH_CARD_TEXT_(card, 2, "4err%d", rc); return rc; } rc = qeth_ulp_setup(card); if (rc) { QETH_CARD_TEXT_(card, 2, "5err%d", rc); return rc; } rc = qeth_alloc_qdio_queues(card); if (rc) { QETH_CARD_TEXT_(card, 2, "5err%d", rc); return rc; } rc = qeth_qdio_establish(card); if (rc) { QETH_CARD_TEXT_(card, 2, "6err%d", rc); qeth_free_qdio_queues(card); return rc; } rc = qeth_qdio_activate(card); if (rc) { QETH_CARD_TEXT_(card, 2, "7err%d", rc); return rc; } rc = qeth_dm_act(card); if (rc) { QETH_CARD_TEXT_(card, 2, "8err%d", rc); return rc; } return 0; } static void qeth_print_status_message(struct qeth_card *card) { switch (card->info.type) { case QETH_CARD_TYPE_OSD: case QETH_CARD_TYPE_OSM: case QETH_CARD_TYPE_OSX: /* VM will use a non-zero first character * to indicate a HiperSockets like reporting * of the level OSA sets the first character to zero * */ if (!card->info.mcl_level[0]) { scnprintf(card->info.mcl_level, sizeof(card->info.mcl_level), "%02x%02x", card->info.mcl_level[2], card->info.mcl_level[3]); break; } fallthrough; case QETH_CARD_TYPE_IQD: if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) { card->info.mcl_level[0] = (char) _ebcasc[(__u8) card->info.mcl_level[0]]; card->info.mcl_level[1] = (char) _ebcasc[(__u8) card->info.mcl_level[1]]; card->info.mcl_level[2] = (char) _ebcasc[(__u8) card->info.mcl_level[2]]; card->info.mcl_level[3] = (char) _ebcasc[(__u8) card->info.mcl_level[3]]; card->info.mcl_level[QETH_MCL_LENGTH] = 0; } break; default: memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1); } dev_info(&card->gdev->dev, "Device is a%s card%s%s%s\nwith link type %s.\n", qeth_get_cardname(card), (card->info.mcl_level[0]) ? " (level: " : "", (card->info.mcl_level[0]) ? card->info.mcl_level : "", (card->info.mcl_level[0]) ? ")" : "", qeth_get_cardname_short(card)); } static void qeth_initialize_working_pool_list(struct qeth_card *card) { struct qeth_buffer_pool_entry *entry; QETH_CARD_TEXT(card, 5, "inwrklst"); list_for_each_entry(entry, &card->qdio.init_pool.entry_list, init_list) { qeth_put_buffer_pool_entry(card, entry); } } static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry( struct qeth_card *card) { struct qeth_buffer_pool_entry *entry; int i, free; if (list_empty(&card->qdio.in_buf_pool.entry_list)) return NULL; list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) { free = 1; for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) { if (page_count(entry->elements[i]) > 1) { free = 0; break; } } if (free) { list_del_init(&entry->list); return entry; } } /* no free buffer in pool so take first one and swap pages */ entry = list_first_entry(&card->qdio.in_buf_pool.entry_list, struct qeth_buffer_pool_entry, list); for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) { if (page_count(entry->elements[i]) > 1) { struct page *page = dev_alloc_page(); if (!page) return NULL; __free_page(entry->elements[i]); entry->elements[i] = page; QETH_CARD_STAT_INC(card, rx_sg_alloc_page); } } list_del_init(&entry->list); return entry; } static int qeth_init_input_buffer(struct qeth_card *card, struct qeth_qdio_buffer *buf) { struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry; int i; if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) { buf->rx_skb = netdev_alloc_skb(card->dev, ETH_HLEN + sizeof(struct ipv6hdr)); if (!buf->rx_skb) return -ENOMEM; } if (!pool_entry) { pool_entry = qeth_find_free_buffer_pool_entry(card); if (!pool_entry) return -ENOBUFS; buf->pool_entry = pool_entry; } /* * since the buffer is accessed only from the input_tasklet * there shouldn't be a need to synchronize; also, since we use * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run out off * buffers */ for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) { buf->buffer->element[i].length = PAGE_SIZE; buf->buffer->element[i].addr = u64_to_dma64( page_to_phys(pool_entry->elements[i])); if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1) buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY; else buf->buffer->element[i].eflags = 0; buf->buffer->element[i].sflags = 0; } return 0; } static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card, struct qeth_qdio_out_q *queue) { if (!IS_IQD(card) || qeth_iqd_is_mcast_queue(card, queue) || card->options.cq == QETH_CQ_ENABLED || qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd)) return 1; return card->ssqd.mmwc ? card->ssqd.mmwc : 1; } static int qeth_init_qdio_queues(struct qeth_card *card) { unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count; unsigned int i; int rc; QETH_CARD_TEXT(card, 2, "initqdqs"); /* inbound queue */ qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); memset(&card->rx, 0, sizeof(struct qeth_rx)); qeth_initialize_working_pool_list(card); /*give only as many buffers to hardware as we have buffer pool entries*/ for (i = 0; i < rx_bufs; i++) { rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]); if (rc) return rc; } card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs); rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0, 0, rx_bufs); if (rc) { QETH_CARD_TEXT_(card, 2, "1err%d", rc); return rc; } /* completion */ rc = qeth_cq_init(card); if (rc) { return rc; } /* outbound queue */ for (i = 0; i < card->qdio.no_out_queues; ++i) { struct qeth_qdio_out_q *queue = card->qdio.out_qs[i]; qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card); queue->next_buf_to_fill = 0; queue->do_pack = 0; queue->prev_hdr = NULL; queue->coalesced_frames = 0; queue->bulk_start = 0; queue->bulk_count = 0; queue->bulk_max = qeth_tx_select_bulk_max(card, queue); atomic_set(&queue->used_buffers, 0); atomic_set(&queue->set_pci_flags_count, 0); netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i)); } return 0; } static void qeth_ipa_finalize_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob) { qeth_mpc_finalize_cmd(card, iob); /* override with IPA-specific values: */ __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++; } static void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob, u16 cmd_length) { u8 prot_type = qeth_mpc_select_prot_type(card); u16 total_length = iob->length; qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length, iob->data); iob->finalize = qeth_ipa_finalize_cmd; memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE); memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2); memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1); memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2); memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2); memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data), &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH); memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2); } static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob, struct qeth_cmd_buffer *reply) { struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply); return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno); } struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card, enum qeth_ipa_cmds cmd_code, enum qeth_prot_versions prot, unsigned int data_length) { struct qeth_cmd_buffer *iob; struct qeth_ipacmd_hdr *hdr; data_length += offsetof(struct qeth_ipa_cmd, data); iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1, QETH_IPA_TIMEOUT); if (!iob) return NULL; qeth_prepare_ipa_cmd(card, iob, data_length); iob->match = qeth_ipa_match_reply; hdr = &__ipa_cmd(iob)->hdr; hdr->command = cmd_code; hdr->initiator = IPA_CMD_INITIATOR_HOST; /* hdr->seqno is set by qeth_send_control_data() */ hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH; hdr->rel_adapter_no = (u8) card->dev->dev_port; hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1; hdr->param_count = 1; hdr->prot_version = prot; return iob; } EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd); static int qeth_send_ipa_cmd_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; return (cmd->hdr.return_code) ? -EIO : 0; } /* * qeth_send_ipa_cmd() - send an IPA command * * See qeth_send_control_data() for explanation of the arguments. */ int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob, int (*reply_cb)(struct qeth_card *, struct qeth_reply*, unsigned long), void *reply_param) { int rc; QETH_CARD_TEXT(card, 4, "sendipa"); if (card->read_or_write_problem) { qeth_put_cmd(iob); return -EIO; } if (reply_cb == NULL) reply_cb = qeth_send_ipa_cmd_cb; rc = qeth_send_control_data(card, iob, reply_cb, reply_param); if (rc == -ETIME) { qeth_clear_ipacmd_list(card); qeth_schedule_recovery(card); } return rc; } EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd); static int qeth_send_startlan_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE) return -ENETDOWN; return (cmd->hdr.return_code) ? -EIO : 0; } static int qeth_send_startlan(struct qeth_card *card) { struct qeth_cmd_buffer *iob; QETH_CARD_TEXT(card, 2, "strtlan"); iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0); if (!iob) return -ENOMEM; return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL); } static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd) { if (!cmd->hdr.return_code) cmd->hdr.return_code = cmd->data.setadapterparms.hdr.return_code; return cmd->hdr.return_code; } static int qeth_query_setadapterparms_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; struct qeth_query_cmds_supp *query_cmd; QETH_CARD_TEXT(card, 3, "quyadpcb"); if (qeth_setadpparms_inspect_rc(cmd)) return -EIO; query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp; if (query_cmd->lan_type & 0x7f) { if (!qeth_is_supported_link_type(card, query_cmd->lan_type)) return -EPROTONOSUPPORT; card->info.link_type = query_cmd->lan_type; QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type); } card->options.adp.supported = query_cmd->supported_cmds; return 0; } static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card, enum qeth_ipa_setadp_cmd adp_cmd, unsigned int data_length) { struct qeth_ipacmd_setadpparms_hdr *hdr; struct qeth_cmd_buffer *iob; iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4, data_length + offsetof(struct qeth_ipacmd_setadpparms, data)); if (!iob) return NULL; hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr; hdr->cmdlength = sizeof(*hdr) + data_length; hdr->command_code = adp_cmd; hdr->used_total = 1; hdr->seq_no = 1; return iob; } static int qeth_query_setadapterparms(struct qeth_card *card) { int rc; struct qeth_cmd_buffer *iob; QETH_CARD_TEXT(card, 3, "queryadp"); iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED, SETADP_DATA_SIZEOF(query_cmds_supp)); if (!iob) return -ENOMEM; rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL); return rc; } static int qeth_query_ipassists_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd; QETH_CARD_TEXT(card, 2, "qipasscb"); cmd = (struct qeth_ipa_cmd *) data; switch (cmd->hdr.return_code) { case IPA_RC_SUCCESS: break; case IPA_RC_NOTSUPP: case IPA_RC_L2_UNSUPPORTED_CMD: QETH_CARD_TEXT(card, 2, "ipaunsup"); card->options.ipa4.supported |= IPA_SETADAPTERPARMS; card->options.ipa6.supported |= IPA_SETADAPTERPARMS; return -EOPNOTSUPP; default: QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n", CARD_DEVID(card), cmd->hdr.return_code); return -EIO; } if (cmd->hdr.prot_version == QETH_PROT_IPV4) card->options.ipa4 = cmd->hdr.assists; else if (cmd->hdr.prot_version == QETH_PROT_IPV6) card->options.ipa6 = cmd->hdr.assists; else QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n", CARD_DEVID(card)); return 0; } static int qeth_query_ipassists(struct qeth_card *card, enum qeth_prot_versions prot) { int rc; struct qeth_cmd_buffer *iob; QETH_CARD_TEXT_(card, 2, "qipassi%i", prot); iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0); if (!iob) return -ENOMEM; rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL); return rc; } static int qeth_query_switch_attributes_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; struct qeth_query_switch_attributes *attrs; struct qeth_switch_info *sw_info; QETH_CARD_TEXT(card, 2, "qswiatcb"); if (qeth_setadpparms_inspect_rc(cmd)) return -EIO; sw_info = (struct qeth_switch_info *)reply->param; attrs = &cmd->data.setadapterparms.data.query_switch_attributes; sw_info->capabilities = attrs->capabilities; sw_info->settings = attrs->settings; QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities, sw_info->settings); return 0; } int qeth_query_switch_attributes(struct qeth_card *card, struct qeth_switch_info *sw_info) { struct qeth_cmd_buffer *iob; QETH_CARD_TEXT(card, 2, "qswiattr"); if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES)) return -EOPNOTSUPP; if (!netif_carrier_ok(card->dev)) return -ENOMEDIUM; iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0); if (!iob) return -ENOMEM; return qeth_send_ipa_cmd(card, iob, qeth_query_switch_attributes_cb, sw_info); } struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card, enum qeth_diags_cmds sub_cmd, unsigned int data_length) { struct qeth_ipacmd_diagass *cmd; struct qeth_cmd_buffer *iob; iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE, DIAG_HDR_LEN + data_length); if (!iob) return NULL; cmd = &__ipa_cmd(iob)->data.diagass; cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length; cmd->subcmd = sub_cmd; return iob; } EXPORT_SYMBOL_GPL(qeth_get_diag_cmd); static int qeth_query_setdiagass_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; u16 rc = cmd->hdr.return_code; if (rc) { QETH_CARD_TEXT_(card, 2, "diagq:%x", rc); return -EIO; } card->info.diagass_support = cmd->data.diagass.ext; return 0; } static int qeth_query_setdiagass(struct qeth_card *card) { struct qeth_cmd_buffer *iob; QETH_CARD_TEXT(card, 2, "qdiagass"); iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0); if (!iob) return -ENOMEM; return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL); } static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid) { unsigned long info = get_zeroed_page(GFP_KERNEL); struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info; struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info; struct ccw_dev_id ccwid; int level; tid->chpid = card->info.chpid; ccw_device_get_id(CARD_RDEV(card), &ccwid); tid->ssid = ccwid.ssid; tid->devno = ccwid.devno; if (!info) return; level = stsi(NULL, 0, 0, 0); if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0)) tid->lparnr = info222->lpar_number; if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) { EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name)); memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname)); } free_page(info); } static int qeth_hw_trap_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; u16 rc = cmd->hdr.return_code; if (rc) { QETH_CARD_TEXT_(card, 2, "trapc:%x", rc); return -EIO; } return 0; } int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action) { struct qeth_cmd_buffer *iob; struct qeth_ipa_cmd *cmd; QETH_CARD_TEXT(card, 2, "diagtrap"); iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64); if (!iob) return -ENOMEM; cmd = __ipa_cmd(iob); cmd->data.diagass.type = 1; cmd->data.diagass.action = action; switch (action) { case QETH_DIAGS_TRAP_ARM: cmd->data.diagass.options = 0x0003; cmd->data.diagass.ext = 0x00010000 + sizeof(struct qeth_trap_id); qeth_get_trap_id(card, (struct qeth_trap_id *)cmd->data.diagass.cdata); break; case QETH_DIAGS_TRAP_DISARM: cmd->data.diagass.options = 0x0001; break; case QETH_DIAGS_TRAP_CAPTURE: break; } return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL); } static int qeth_check_qdio_errors(struct qeth_card *card, struct qdio_buffer *buf, unsigned int qdio_error, const char *dbftext) { if (qdio_error) { QETH_CARD_TEXT(card, 2, dbftext); QETH_CARD_TEXT_(card, 2, " F15=%02X", buf->element[15].sflags); QETH_CARD_TEXT_(card, 2, " F14=%02X", buf->element[14].sflags); QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error); if ((buf->element[15].sflags) == 0x12) { QETH_CARD_STAT_INC(card, rx_fifo_errors); return 0; } else return 1; } return 0; } static unsigned int qeth_rx_refill_queue(struct qeth_card *card, unsigned int count) { struct qeth_qdio_q *queue = card->qdio.in_q; struct list_head *lh; int i; int rc; int newcount = 0; /* only requeue at a certain threshold to avoid SIGAs */ if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) { for (i = queue->next_buf_to_init; i < queue->next_buf_to_init + count; ++i) { if (qeth_init_input_buffer(card, &queue->bufs[QDIO_BUFNR(i)])) { break; } else { newcount++; } } if (newcount < count) { /* we are in memory shortage so we switch back to traditional skb allocation and drop packages */ atomic_set(&card->force_alloc_skb, 3); count = newcount; } else { atomic_add_unless(&card->force_alloc_skb, -1, 0); } if (!count) { i = 0; list_for_each(lh, &card->qdio.in_buf_pool.entry_list) i++; if (i == card->qdio.in_buf_pool.buf_count) { QETH_CARD_TEXT(card, 2, "qsarbw"); schedule_delayed_work( &card->buffer_reclaim_work, QETH_RECLAIM_WORK_TIME); } return 0; } rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0, queue->next_buf_to_init, count); if (rc) { QETH_CARD_TEXT(card, 2, "qinberr"); } queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init + count); return count; } return 0; } static void qeth_buffer_reclaim_work(struct work_struct *work) { struct qeth_card *card = container_of(to_delayed_work(work), struct qeth_card, buffer_reclaim_work); local_bh_disable(); napi_schedule(&card->napi); /* kick-start the NAPI softirq: */ local_bh_enable(); } static void qeth_handle_send_error(struct qeth_card *card, struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err) { int sbalf15 = buffer->buffer->element[15].sflags; QETH_CARD_TEXT(card, 6, "hdsnderr"); qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr"); if (!qdio_err) return; if ((sbalf15 >= 15) && (sbalf15 <= 31)) return; QETH_CARD_TEXT(card, 1, "lnkfail"); QETH_CARD_TEXT_(card, 1, "%04x %02x", (u16)qdio_err, (u8)sbalf15); } /** * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer. * @queue: queue to check for packing buffer * * Returns number of buffers that were prepared for flush. */ static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue) { struct qeth_qdio_out_buffer *buffer; buffer = queue->bufs[queue->next_buf_to_fill]; if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) && (buffer->next_element_to_fill > 0)) { /* it's a packing buffer */ atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); queue->next_buf_to_fill = QDIO_BUFNR(queue->next_buf_to_fill + 1); return 1; } return 0; } /* * Switched to packing state if the number of used buffers on a queue * reaches a certain limit. */ static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue) { if (!queue->do_pack) { if (atomic_read(&queue->used_buffers) >= QETH_HIGH_WATERMARK_PACK){ /* switch non-PACKING -> PACKING */ QETH_CARD_TEXT(queue->card, 6, "np->pack"); QETH_TXQ_STAT_INC(queue, packing_mode_switch); queue->do_pack = 1; } } } /* * Switches from packing to non-packing mode. If there is a packing * buffer on the queue this buffer will be prepared to be flushed. * In that case 1 is returned to inform the caller. If no buffer * has to be flushed, zero is returned. */ static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue) { if (queue->do_pack) { if (atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) { /* switch PACKING -> non-PACKING */ QETH_CARD_TEXT(queue->card, 6, "pack->np"); QETH_TXQ_STAT_INC(queue, packing_mode_switch); queue->do_pack = 0; return qeth_prep_flush_pack_buffer(queue); } } return 0; } static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index, int count) { struct qeth_qdio_out_buffer *buf = queue->bufs[index]; struct qeth_card *card = queue->card; unsigned int frames, usecs; struct qaob *aob = NULL; int rc; int i; for (i = index; i < index + count; ++i) { unsigned int bidx = QDIO_BUFNR(i); struct sk_buff *skb; buf = queue->bufs[bidx]; buf->buffer->element[buf->next_element_to_fill - 1].eflags |= SBAL_EFLAGS_LAST_ENTRY; queue->coalesced_frames += buf->frames; if (IS_IQD(card)) { skb_queue_walk(&buf->skb_list, skb) skb_tx_timestamp(skb); } } if (IS_IQD(card)) { if (card->options.cq == QETH_CQ_ENABLED && !qeth_iqd_is_mcast_queue(card, queue) && count == 1) { if (!buf->aob) buf->aob = kmem_cache_zalloc(qeth_qaob_cache, GFP_ATOMIC); if (buf->aob) { struct qeth_qaob_priv1 *priv; aob = buf->aob; priv = (struct qeth_qaob_priv1 *)&aob->user1; priv->state = QETH_QAOB_ISSUED; priv->queue_no = queue->queue_no; } } } else { if (!queue->do_pack) { if ((atomic_read(&queue->used_buffers) >= (QETH_HIGH_WATERMARK_PACK - QETH_WATERMARK_PACK_FUZZ)) && !atomic_read(&queue->set_pci_flags_count)) { /* it's likely that we'll go to packing * mode soon */ atomic_inc(&queue->set_pci_flags_count); buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ; } } else { if (!atomic_read(&queue->set_pci_flags_count)) { /* * there's no outstanding PCI any more, so we * have to request a PCI to be sure the PCI * will wake at some time in the future then we * can flush packed buffers that might still be * hanging around, which can happen if no * further send was requested by the stack */ atomic_inc(&queue->set_pci_flags_count); buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ; } } } QETH_TXQ_STAT_INC(queue, doorbell); rc = qdio_add_bufs_to_output_queue(CARD_DDEV(card), queue->queue_no, index, count, aob); switch (rc) { case 0: case -ENOBUFS: /* ignore temporary SIGA errors without busy condition */ /* Fake the TX completion interrupt: */ frames = READ_ONCE(queue->max_coalesced_frames); usecs = READ_ONCE(queue->coalesce_usecs); if (frames && queue->coalesced_frames >= frames) { napi_schedule(&queue->napi); queue->coalesced_frames = 0; QETH_TXQ_STAT_INC(queue, coal_frames); } else if (qeth_use_tx_irqs(card) && atomic_read(&queue->used_buffers) >= 32) { /* Old behaviour carried over from the qdio layer: */ napi_schedule(&queue->napi); QETH_TXQ_STAT_INC(queue, coal_frames); } else if (usecs) { qeth_tx_arm_timer(queue, usecs); } break; default: QETH_CARD_TEXT(queue->card, 2, "flushbuf"); QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no); QETH_CARD_TEXT_(queue->card, 2, " idx%d", index); QETH_CARD_TEXT_(queue->card, 2, " c%d", count); QETH_CARD_TEXT_(queue->card, 2, " err%d", rc); /* this must not happen under normal circumstances. if it * happens something is really wrong -> recover */ qeth_schedule_recovery(queue->card); } } static void qeth_flush_queue(struct qeth_qdio_out_q *queue) { qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count); queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count); queue->prev_hdr = NULL; queue->bulk_count = 0; } static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue) { /* * check if we have to switch to non-packing mode or if * we have to get a pci flag out on the queue */ if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) || !atomic_read(&queue->set_pci_flags_count)) { unsigned int index, flush_cnt; spin_lock(&queue->lock); index = queue->next_buf_to_fill; flush_cnt = qeth_switch_to_nonpacking_if_needed(queue); if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count)) flush_cnt = qeth_prep_flush_pack_buffer(queue); if (flush_cnt) { qeth_flush_buffers(queue, index, flush_cnt); QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt); } spin_unlock(&queue->lock); } } static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr) { struct qeth_card *card = (struct qeth_card *)card_ptr; napi_schedule_irqoff(&card->napi); } int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq) { if (card->options.cq == QETH_CQ_NOTAVAILABLE) return -1; card->options.cq = cq; return 0; } EXPORT_SYMBOL_GPL(qeth_configure_cq); static void qeth_qdio_handle_aob(struct qeth_card *card, struct qaob *aob) { struct qeth_qaob_priv1 *priv = (struct qeth_qaob_priv1 *)&aob->user1; unsigned int queue_no = priv->queue_no; BUILD_BUG_ON(sizeof(*priv) > ARRAY_SIZE(aob->user1)); if (xchg(&priv->state, QETH_QAOB_DONE) == QETH_QAOB_PENDING && queue_no < card->qdio.no_out_queues) napi_schedule(&card->qdio.out_qs[queue_no]->napi); } static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err, unsigned int queue, int first_element, int count) { struct qeth_qdio_q *cq = card->qdio.c_q; int i; int rc; QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element); QETH_CARD_TEXT_(card, 5, "qcqhc%d", count); QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err); if (qdio_err) { netif_tx_stop_all_queues(card->dev); qeth_schedule_recovery(card); return; } for (i = first_element; i < first_element + count; ++i) { struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)]; int e = 0; while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) && buffer->element[e].addr) { dma64_t phys_aob_addr = buffer->element[e].addr; qeth_qdio_handle_aob(card, dma64_to_virt(phys_aob_addr)); ++e; } qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER); } rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), queue, cq->next_buf_to_init, count); if (rc) { dev_warn(&card->gdev->dev, "QDIO reported an error, rc=%i\n", rc); QETH_CARD_TEXT(card, 2, "qcqherr"); } cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count); } static void qeth_qdio_input_handler(struct ccw_device *ccwdev, unsigned int qdio_err, int queue, int first_elem, int count, unsigned long card_ptr) { struct qeth_card *card = (struct qeth_card *)card_ptr; QETH_CARD_TEXT_(card, 2, "qihq%d", queue); QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err); if (qdio_err) qeth_schedule_recovery(card); } static void qeth_qdio_output_handler(struct ccw_device *ccwdev, unsigned int qdio_error, int __queue, int first_element, int count, unsigned long card_ptr) { struct qeth_card *card = (struct qeth_card *) card_ptr; QETH_CARD_TEXT(card, 2, "achkcond"); netif_tx_stop_all_queues(card->dev); qeth_schedule_recovery(card); } /* * Note: Function assumes that we have 4 outbound queues. */ static int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb) { struct vlan_ethhdr *veth = vlan_eth_hdr(skb); u8 tos; switch (card->qdio.do_prio_queueing) { case QETH_PRIO_Q_ING_TOS: case QETH_PRIO_Q_ING_PREC: switch (vlan_get_protocol(skb)) { case htons(ETH_P_IP): tos = ipv4_get_dsfield(ip_hdr(skb)); break; case htons(ETH_P_IPV6): tos = ipv6_get_dsfield(ipv6_hdr(skb)); break; default: return card->qdio.default_out_queue; } if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC) return ~tos >> 6 & 3; if (tos & IPTOS_MINCOST) return 3; if (tos & IPTOS_RELIABILITY) return 2; if (tos & IPTOS_THROUGHPUT) return 1; if (tos & IPTOS_LOWDELAY) return 0; break; case QETH_PRIO_Q_ING_SKB: if (skb->priority > 5) return 0; return ~skb->priority >> 1 & 3; case QETH_PRIO_Q_ING_VLAN: if (veth->h_vlan_proto == htons(ETH_P_8021Q)) return ~ntohs(veth->h_vlan_TCI) >> (VLAN_PRIO_SHIFT + 1) & 3; break; case QETH_PRIO_Q_ING_FIXED: return card->qdio.default_out_queue; default: break; } return card->qdio.default_out_queue; } /** * qeth_get_elements_for_frags() - find number of SBALEs for skb frags. * @skb: SKB address * * Returns the number of pages, and thus QDIO buffer elements, needed to cover * fragmented part of the SKB. Returns zero for linear SKB. */ static int qeth_get_elements_for_frags(struct sk_buff *skb) { int cnt, elements = 0; for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) { skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt]; elements += qeth_get_elements_for_range( (addr_t)skb_frag_address(frag), (addr_t)skb_frag_address(frag) + skb_frag_size(frag)); } return elements; } /** * qeth_count_elements() - Counts the number of QDIO buffer elements needed * to transmit an skb. * @skb: the skb to operate on. * @data_offset: skip this part of the skb's linear data * * Returns the number of pages, and thus QDIO buffer elements, needed to map the * skb's data (both its linear part and paged fragments). */ static unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset) { unsigned int elements = qeth_get_elements_for_frags(skb); addr_t end = (addr_t)skb->data + skb_headlen(skb); addr_t start = (addr_t)skb->data + data_offset; if (start != end) elements += qeth_get_elements_for_range(start, end); return elements; } #define QETH_HDR_CACHE_OBJ_SIZE (sizeof(struct qeth_hdr_tso) + \ MAX_TCP_HEADER) /** * qeth_add_hw_header() - add a HW header to an skb. * @queue: TX queue that the skb will be placed on. * @skb: skb that the HW header should be added to. * @hdr: double pointer to a qeth_hdr. When returning with >= 0, * it contains a valid pointer to a qeth_hdr. * @hdr_len: length of the HW header. * @proto_len: length of protocol headers that need to be in same page as the * HW header. * @elements: returns the required number of buffer elements for this skb. * * Returns the pushed length. If the header can't be pushed on * (eg. because it would cross a page boundary), it is allocated from * the cache instead and 0 is returned. * The number of needed buffer elements is returned in @elements. * Error to create the hdr is indicated by returning with < 0. */ static int qeth_add_hw_header(struct qeth_qdio_out_q *queue, struct sk_buff *skb, struct qeth_hdr **hdr, unsigned int hdr_len, unsigned int proto_len, unsigned int *elements) { gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0); const unsigned int contiguous = proto_len ? proto_len : 1; const unsigned int max_elements = queue->max_elements; unsigned int __elements; addr_t start, end; bool push_ok; int rc; check_layout: start = (addr_t)skb->data - hdr_len; end = (addr_t)skb->data; if (qeth_get_elements_for_range(start, end + contiguous) == 1) { /* Push HW header into same page as first protocol header. */ push_ok = true; /* ... but TSO always needs a separate element for headers: */ if (skb_is_gso(skb)) __elements = 1 + qeth_count_elements(skb, proto_len); else __elements = qeth_count_elements(skb, 0); } else if (!proto_len && PAGE_ALIGNED(skb->data)) { /* Push HW header into preceding page, flush with skb->data. */ push_ok = true; __elements = 1 + qeth_count_elements(skb, 0); } else { /* Use header cache, copy protocol headers up. */ push_ok = false; __elements = 1 + qeth_count_elements(skb, proto_len); } /* Compress skb to fit into one IO buffer: */ if (__elements > max_elements) { if (!skb_is_nonlinear(skb)) { /* Drop it, no easy way of shrinking it further. */ QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n max_elements, __elements, skb->len); return -E2BIG; } rc = skb_linearize(skb); if (rc) { QETH_TXQ_STAT_INC(queue, skbs_linearized_fail); return rc; } QETH_TXQ_STAT_INC(queue, skbs_linearized); /* Linearization changed the layout, re-evaluate: */ goto check_layout; } *elements = __elements; /* Add the header: */ if (push_ok) { *hdr = skb_push(skb, hdr_len); return hdr_len; } /* Fall back to cache element with known-good alignment: */ if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE) return -E2BIG; *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp); if (!*hdr) return -ENOMEM; /* Copy protocol headers behind HW header: */ skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len); return 0; } static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue, struct sk_buff *curr_skb, struct qeth_hdr *curr_hdr) { struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start]; struct qeth_hdr *prev_hdr = queue->prev_hdr; if (!prev_hdr) return true; /* All packets must have the same target: */ if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) { struct sk_buff *prev_skb = skb_peek(&buffer->skb_list); return ether_addr_equal(eth_hdr(prev_skb)->h_dest, eth_hdr(curr_skb)->h_dest) && qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2); } return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) && qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3); } /** * qeth_fill_buffer() - map skb into an output buffer * @buf: buffer to transport the skb * @skb: skb to map into the buffer * @hdr: qeth_hdr for this skb. Either at skb->data, or allocated * from qeth_core_header_cache. * @offset: when mapping the skb, start at skb->data + offset * @hd_len: if > 0, build a dedicated header element of this size */ static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf, struct sk_buff *skb, struct qeth_hdr *hdr, unsigned int offset, unsigned int hd_len) { struct qdio_buffer *buffer = buf->buffer; int element = buf->next_element_to_fill; int length = skb_headlen(skb) - offset; char *data = skb->data + offset; unsigned int elem_length, cnt; bool is_first_elem = true; __skb_queue_tail(&buf->skb_list, skb); /* build dedicated element for HW Header */ if (hd_len) { is_first_elem = false; buffer->element[element].addr = virt_to_dma64(hdr); buffer->element[element].length = hd_len; buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG; /* HW header is allocated from cache: */ if ((void *)hdr != skb->data) __set_bit(element, buf->from_kmem_cache); /* HW header was pushed and is contiguous with linear part: */ else if (length > 0 && !PAGE_ALIGNED(data) && (data == (char *)hdr + hd_len)) buffer->element[element].eflags |= SBAL_EFLAGS_CONTIGUOUS; element++; } /* map linear part into buffer element(s) */ while (length > 0) { elem_length = min_t(unsigned int, length, PAGE_SIZE - offset_in_page(data)); buffer->element[element].addr = virt_to_dma64(data); buffer->element[element].length = elem_length; length -= elem_length; if (is_first_elem) { is_first_elem = false; if (length || skb_is_nonlinear(skb)) /* skb needs additional elements */ buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG; else buffer->element[element].eflags = 0; } else { buffer->element[element].eflags = SBAL_EFLAGS_MIDDLE_FRAG; } data += elem_length; element++; } /* map page frags into buffer element(s) */ for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) { skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt]; data = skb_frag_address(frag); length = skb_frag_size(frag); while (length > 0) { elem_length = min_t(unsigned int, length, PAGE_SIZE - offset_in_page(data)); buffer->element[element].addr = virt_to_dma64(data); buffer->element[element].length = elem_length; buffer->element[element].eflags = SBAL_EFLAGS_MIDDLE_FRAG; length -= elem_length; data += elem_length; element++; } } if (buffer->element[element - 1].eflags) buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG; buf->next_element_to_fill = element; return element; } static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue, struct sk_buff *skb, unsigned int elements, struct qeth_hdr *hdr, unsigned int offset, unsigned int hd_len) { unsigned int bytes = qdisc_pkt_len(skb); struct qeth_qdio_out_buffer *buffer; unsigned int next_element; struct netdev_queue *txq; bool stopped = false; bool flush; buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)]; txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb)); /* Just a sanity check, the wake/stop logic should ensure that we always * get a free buffer. */ if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) return -EBUSY; flush = !qeth_iqd_may_bulk(queue, skb, hdr); if (flush || (buffer->next_element_to_fill + elements > queue->max_elements)) { if (buffer->next_element_to_fill > 0) { atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); queue->bulk_count++; } if (queue->bulk_count >= queue->bulk_max) flush = true; if (flush) qeth_flush_queue(queue); buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)]; /* Sanity-check again: */ if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) return -EBUSY; } if (buffer->next_element_to_fill == 0 && atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) { /* If a TX completion happens right _here_ and misses to wake * the txq, then our re-check below will catch the race. */ QETH_TXQ_STAT_INC(queue, stopped); netif_tx_stop_queue(txq); stopped = true; } next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len); buffer->bytes += bytes; buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1; queue->prev_hdr = hdr; flush = __netdev_tx_sent_queue(txq, bytes, !stopped && netdev_xmit_more()); if (flush || next_element >= queue->max_elements) { atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); queue->bulk_count++; if (queue->bulk_count >= queue->bulk_max) flush = true; if (flush) qeth_flush_queue(queue); } if (stopped && !qeth_out_queue_is_full(queue)) netif_tx_start_queue(txq); return 0; } static int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue, struct sk_buff *skb, struct qeth_hdr *hdr, unsigned int offset, unsigned int hd_len, unsigned int elements_needed) { unsigned int start_index = queue->next_buf_to_fill; struct qeth_qdio_out_buffer *buffer; unsigned int next_element; struct netdev_queue *txq; bool stopped = false; int flush_count = 0; int do_pack = 0; int rc = 0; buffer = queue->bufs[queue->next_buf_to_fill]; /* Just a sanity check, the wake/stop logic should ensure that we always * get a free buffer. */ if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) return -EBUSY; txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb)); /* check if we need to switch packing state of this queue */ qeth_switch_to_packing_if_needed(queue); if (queue->do_pack) { do_pack = 1; /* does packet fit in current buffer? */ if (buffer->next_element_to_fill + elements_needed > queue->max_elements) { /* ... no -> set state PRIMED */ atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); flush_count++; queue->next_buf_to_fill = QDIO_BUFNR(queue->next_buf_to_fill + 1); buffer = queue->bufs[queue->next_buf_to_fill]; /* We stepped forward, so sanity-check again: */ if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) { qeth_flush_buffers(queue, start_index, flush_count); rc = -EBUSY; goto out; } } } if (buffer->next_element_to_fill == 0 && atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) { /* If a TX completion happens right _here_ and misses to wake * the txq, then our re-check below will catch the race. */ QETH_TXQ_STAT_INC(queue, stopped); netif_tx_stop_queue(txq); stopped = true; } next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len); buffer->bytes += qdisc_pkt_len(skb); buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1; if (queue->do_pack) QETH_TXQ_STAT_INC(queue, skbs_pack); if (!queue->do_pack || stopped || next_element >= queue->max_elements) { flush_count++; atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED); queue->next_buf_to_fill = QDIO_BUFNR(queue->next_buf_to_fill + 1); } if (flush_count) qeth_flush_buffers(queue, start_index, flush_count); out: if (do_pack) QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count); if (stopped && !qeth_out_queue_is_full(queue)) netif_tx_start_queue(txq); return rc; } static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr, unsigned int payload_len, struct sk_buff *skb, unsigned int proto_len) { struct qeth_hdr_ext_tso *ext = &hdr->ext; ext->hdr_tot_len = sizeof(*ext); ext->imb_hdr_no = 1; ext->hdr_type = 1; ext->hdr_version = 1; ext->hdr_len = 28; ext->payload_len = payload_len; ext->mss = skb_shinfo(skb)->gso_size; ext->dg_hdr_len = proto_len; } int qeth_xmit(struct qeth_card *card, struct sk_buff *skb, struct qeth_qdio_out_q *queue, __be16 proto, void (*fill_header)(struct qeth_qdio_out_q *queue, struct qeth_hdr *hdr, struct sk_buff *skb, __be16 proto, unsigned int data_len)) { unsigned int proto_len, hw_hdr_len; unsigned int frame_len = skb->len; bool is_tso = skb_is_gso(skb); unsigned int data_offset = 0; struct qeth_hdr *hdr = NULL; unsigned int hd_len = 0; unsigned int elements; int push_len, rc; if (is_tso) { hw_hdr_len = sizeof(struct qeth_hdr_tso); proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb); } else { hw_hdr_len = sizeof(struct qeth_hdr); proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0; } rc = skb_cow_head(skb, hw_hdr_len); if (rc) return rc; push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len, &elements); if (push_len < 0) return push_len; if (is_tso || !push_len) { /* HW header needs its own buffer element. */ hd_len = hw_hdr_len + proto_len; data_offset = push_len + proto_len; } memset(hdr, 0, hw_hdr_len); fill_header(queue, hdr, skb, proto, frame_len); if (is_tso) qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr, frame_len - proto_len, skb, proto_len); if (IS_IQD(card)) { rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset, hd_len); } else { /* TODO: drop skb_orphan() once TX completion is fast enough */ skb_orphan(skb); spin_lock(&queue->lock); rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset, hd_len, elements); spin_unlock(&queue->lock); } if (rc && !push_len) kmem_cache_free(qeth_core_header_cache, hdr); return rc; } EXPORT_SYMBOL_GPL(qeth_xmit); static int qeth_setadp_promisc_mode_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; struct qeth_ipacmd_setadpparms *setparms; QETH_CARD_TEXT(card, 4, "prmadpcb"); setparms = &(cmd->data.setadapterparms); if (qeth_setadpparms_inspect_rc(cmd)) { QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code); setparms->data.mode = SET_PROMISC_MODE_OFF; } card->info.promisc_mode = setparms->data.mode; return (cmd->hdr.return_code) ? -EIO : 0; } void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable) { enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON : SET_PROMISC_MODE_OFF; struct qeth_cmd_buffer *iob; struct qeth_ipa_cmd *cmd; QETH_CARD_TEXT(card, 4, "setprom"); QETH_CARD_TEXT_(card, 4, "mode:%x", mode); iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE, SETADP_DATA_SIZEOF(mode)); if (!iob) return; cmd = __ipa_cmd(iob); cmd->data.setadapterparms.data.mode = mode; qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL); } EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode); static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; struct qeth_ipacmd_setadpparms *adp_cmd; QETH_CARD_TEXT(card, 4, "chgmaccb"); if (qeth_setadpparms_inspect_rc(cmd)) return -EIO; adp_cmd = &cmd->data.setadapterparms; if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr)) return -EADDRNOTAVAIL; if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) && !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC)) return -EADDRNOTAVAIL; eth_hw_addr_set(card->dev, adp_cmd->data.change_addr.addr); return 0; } int qeth_setadpparms_change_macaddr(struct qeth_card *card) { int rc; struct qeth_cmd_buffer *iob; struct qeth_ipa_cmd *cmd; QETH_CARD_TEXT(card, 4, "chgmac"); iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS, SETADP_DATA_SIZEOF(change_addr)); if (!iob) return -ENOMEM; cmd = __ipa_cmd(iob); cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC; cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN; ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr, card->dev->dev_addr); rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb, NULL); return rc; } EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr); static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; struct qeth_set_access_ctrl *access_ctrl_req; QETH_CARD_TEXT(card, 4, "setaccb"); access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl; QETH_CARD_TEXT_(card, 2, "rc=%d", cmd->data.setadapterparms.hdr.return_code); if (cmd->data.setadapterparms.hdr.return_code != SET_ACCESS_CTRL_RC_SUCCESS) QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n", access_ctrl_req->subcmd_code, CARD_DEVID(card), cmd->data.setadapterparms.hdr.return_code); switch (qeth_setadpparms_inspect_rc(cmd)) { case SET_ACCESS_CTRL_RC_SUCCESS: if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE) dev_info(&card->gdev->dev, "QDIO data connection isolation is deactivated\n"); else dev_info(&card->gdev->dev, "QDIO data connection isolation is activated\n"); return 0; case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED: QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n", CARD_DEVID(card)); return 0; case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED: QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n", CARD_DEVID(card)); return 0; case SET_ACCESS_CTRL_RC_NOT_SUPPORTED: dev_err(&card->gdev->dev, "Adapter does not " "support QDIO data connection isolation\n"); return -EOPNOTSUPP; case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER: dev_err(&card->gdev->dev, "Adapter is dedicated. " "QDIO data connection isolation not supported\n"); return -EOPNOTSUPP; case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF: dev_err(&card->gdev->dev, "TSO does not permit QDIO data connection isolation\n"); return -EPERM; case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED: dev_err(&card->gdev->dev, "The adjacent switch port does not " "support reflective relay mode\n"); return -EOPNOTSUPP; case SET_ACCESS_CTRL_RC_REFLREL_FAILED: dev_err(&card->gdev->dev, "The reflective relay mode cannot be " "enabled at the adjacent switch port"); return -EREMOTEIO; case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED: dev_warn(&card->gdev->dev, "Turning off reflective relay mode " "at the adjacent switch failed\n"); /* benign error while disabling ISOLATION_MODE_FWD */ return 0; default: return -EIO; } } int qeth_setadpparms_set_access_ctrl(struct qeth_card *card, enum qeth_ipa_isolation_modes mode) { int rc; struct qeth_cmd_buffer *iob; struct qeth_ipa_cmd *cmd; struct qeth_set_access_ctrl *access_ctrl_req; QETH_CARD_TEXT(card, 4, "setacctl"); if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) { dev_err(&card->gdev->dev, "Adapter does not support QDIO data connection isolation\n"); return -EOPNOTSUPP; } iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL, SETADP_DATA_SIZEOF(set_access_ctrl)); if (!iob) return -ENOMEM; cmd = __ipa_cmd(iob); access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl; access_ctrl_req->subcmd_code = mode; rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb, NULL); if (rc) { QETH_CARD_TEXT_(card, 2, "rc=%d", rc); QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n", rc, CARD_DEVID(card)); } return rc; } void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue) { struct qeth_card *card; card = dev->ml_priv; QETH_CARD_TEXT(card, 4, "txtimeo"); qeth_schedule_recovery(card); } EXPORT_SYMBOL_GPL(qeth_tx_timeout); static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum) { struct qeth_card *card = dev->ml_priv; int rc = 0; switch (regnum) { case MII_BMCR: /* Basic mode control register */ rc = BMCR_FULLDPLX; if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) && (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) && (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH)) rc |= BMCR_SPEED100; break; case MII_BMSR: /* Basic mode status register */ rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS | BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL | BMSR_100BASE4; break; case MII_PHYSID1: /* PHYS ID 1 */ rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) | dev->dev_addr[2]; rc = (rc >> 5) & 0xFFFF; break; case MII_PHYSID2: /* PHYS ID 2 */ rc = (dev->dev_addr[2] << 10) & 0xFFFF; break; case MII_ADVERTISE: /* Advertisement control reg */ rc = ADVERTISE_ALL; break; case MII_LPA: /* Link partner ability reg */ rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL | LPA_100BASE4 | LPA_LPACK; break; case MII_EXPANSION: /* Expansion register */ break; case MII_DCOUNTER: /* disconnect counter */ break; case MII_FCSCOUNTER: /* false carrier counter */ break; case MII_NWAYTEST: /* N-way auto-neg test register */ break; case MII_RERRCOUNTER: /* rx error counter */ rc = card->stats.rx_length_errors + card->stats.rx_frame_errors + card->stats.rx_fifo_errors; break; case MII_SREVISION: /* silicon revision */ break; case MII_RESV1: /* reserved 1 */ break; case MII_LBRERROR: /* loopback, rx, bypass error */ break; case MII_PHYADDR: /* physical address */ break; case MII_RESV2: /* reserved 2 */ break; case MII_TPISTATUS: /* TPI status for 10mbps */ break; case MII_NCONFIG: /* network interface config */ break; default: break; } return rc; } static int qeth_snmp_command_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; struct qeth_arp_query_info *qinfo = reply->param; struct qeth_ipacmd_setadpparms *adp_cmd; unsigned int data_len; void *snmp_data; QETH_CARD_TEXT(card, 3, "snpcmdcb"); if (cmd->hdr.return_code) { QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code); return -EIO; } if (cmd->data.setadapterparms.hdr.return_code) { cmd->hdr.return_code = cmd->data.setadapterparms.hdr.return_code; QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code); return -EIO; } adp_cmd = &cmd->data.setadapterparms; data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr); if (adp_cmd->hdr.seq_no == 1) { snmp_data = &adp_cmd->data.snmp; } else { snmp_data = &adp_cmd->data.snmp.request; data_len -= offsetof(struct qeth_snmp_cmd, request); } /* check if there is enough room in userspace */ if ((qinfo->udata_len - qinfo->udata_offset) < data_len) { QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC); return -ENOSPC; } QETH_CARD_TEXT_(card, 4, "snore%i", cmd->data.setadapterparms.hdr.used_total); QETH_CARD_TEXT_(card, 4, "sseqn%i", cmd->data.setadapterparms.hdr.seq_no); /*copy entries to user buffer*/ memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len); qinfo->udata_offset += data_len; if (cmd->data.setadapterparms.hdr.seq_no < cmd->data.setadapterparms.hdr.used_total) return 1; return 0; } static int qeth_snmp_command(struct qeth_card *card, char __user *udata) { struct qeth_snmp_ureq __user *ureq; struct qeth_cmd_buffer *iob; unsigned int req_len; struct qeth_arp_query_info qinfo = {0, }; int rc = 0; QETH_CARD_TEXT(card, 3, "snmpcmd"); if (IS_VM_NIC(card)) return -EOPNOTSUPP; if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) && IS_LAYER3(card)) return -EOPNOTSUPP; ureq = (struct qeth_snmp_ureq __user *) udata; if (get_user(qinfo.udata_len, &ureq->hdr.data_len) || get_user(req_len, &ureq->hdr.req_len)) return -EFAULT; /* Sanitize user input, to avoid overflows in iob size calculation: */ if (req_len > QETH_BUFSIZE) return -EINVAL; iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len); if (!iob) return -ENOMEM; if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp, &ureq->cmd, req_len)) { qeth_put_cmd(iob); return -EFAULT; } qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL); if (!qinfo.udata) { qeth_put_cmd(iob); return -ENOMEM; } qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr); rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo); if (rc) QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n", CARD_DEVID(card), rc); else { if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) rc = -EFAULT; } kfree(qinfo.udata); return rc; } static int qeth_setadpparms_query_oat_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data; struct qeth_qoat_priv *priv = reply->param; int resdatalen; QETH_CARD_TEXT(card, 3, "qoatcb"); if (qeth_setadpparms_inspect_rc(cmd)) return -EIO; resdatalen = cmd->data.setadapterparms.hdr.cmdlength; if (resdatalen > (priv->buffer_len - priv->response_len)) return -ENOSPC; memcpy(priv->buffer + priv->response_len, &cmd->data.setadapterparms.hdr, resdatalen); priv->response_len += resdatalen; if (cmd->data.setadapterparms.hdr.seq_no < cmd->data.setadapterparms.hdr.used_total) return 1; return 0; } static int qeth_query_oat_command(struct qeth_card *card, char __user *udata) { int rc = 0; struct qeth_cmd_buffer *iob; struct qeth_ipa_cmd *cmd; struct qeth_query_oat *oat_req; struct qeth_query_oat_data oat_data; struct qeth_qoat_priv priv; void __user *tmp; QETH_CARD_TEXT(card, 3, "qoatcmd"); if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) return -EOPNOTSUPP; if (copy_from_user(&oat_data, udata, sizeof(oat_data))) return -EFAULT; priv.buffer_len = oat_data.buffer_len; priv.response_len = 0; priv.buffer = vzalloc(oat_data.buffer_len); if (!priv.buffer) return -ENOMEM; iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT, SETADP_DATA_SIZEOF(query_oat)); if (!iob) { rc = -ENOMEM; goto out_free; } cmd = __ipa_cmd(iob); oat_req = &cmd->data.setadapterparms.data.query_oat; oat_req->subcmd_code = oat_data.command; rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv); if (!rc) { tmp = is_compat_task() ? compat_ptr(oat_data.ptr) : u64_to_user_ptr(oat_data.ptr); oat_data.response_len = priv.response_len; if (copy_to_user(tmp, priv.buffer, priv.response_len) || copy_to_user(udata, &oat_data, sizeof(oat_data))) rc = -EFAULT; } out_free: vfree(priv.buffer); return rc; } static int qeth_init_link_info_oat_cb(struct qeth_card *card, struct qeth_reply *reply_priv, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data; struct qeth_link_info *link_info = reply_priv->param; struct qeth_query_oat_physical_if *phys_if; struct qeth_query_oat_reply *reply; QETH_CARD_TEXT(card, 2, "qoatincb"); if (qeth_setadpparms_inspect_rc(cmd)) return -EIO; /* Multi-part reply is unexpected, don't bother: */ if (cmd->data.setadapterparms.hdr.used_total > 1) return -EINVAL; /* Expect the reply to start with phys_if data: */ reply = &cmd->data.setadapterparms.data.query_oat.reply[0]; if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF || reply->length < sizeof(*reply)) return -EINVAL; phys_if = &reply->phys_if; switch (phys_if->speed_duplex) { case QETH_QOAT_PHYS_SPEED_10M_HALF: link_info->speed = SPEED_10; link_info->duplex = DUPLEX_HALF; break; case QETH_QOAT_PHYS_SPEED_10M_FULL: link_info->speed = SPEED_10; link_info->duplex = DUPLEX_FULL; break; case QETH_QOAT_PHYS_SPEED_100M_HALF: link_info->speed = SPEED_100; link_info->duplex = DUPLEX_HALF; break; case QETH_QOAT_PHYS_SPEED_100M_FULL: link_info->speed = SPEED_100; link_info->duplex = DUPLEX_FULL; break; case QETH_QOAT_PHYS_SPEED_1000M_HALF: link_info->speed = SPEED_1000; link_info->duplex = DUPLEX_HALF; break; case QETH_QOAT_PHYS_SPEED_1000M_FULL: link_info->speed = SPEED_1000; link_info->duplex = DUPLEX_FULL; break; case QETH_QOAT_PHYS_SPEED_10G_FULL: link_info->speed = SPEED_10000; link_info->duplex = DUPLEX_FULL; break; case QETH_QOAT_PHYS_SPEED_25G_FULL: link_info->speed = SPEED_25000; link_info->duplex = DUPLEX_FULL; break; case QETH_QOAT_PHYS_SPEED_UNKNOWN: default: link_info->speed = SPEED_UNKNOWN; link_info->duplex = DUPLEX_UNKNOWN; break; } switch (phys_if->media_type) { case QETH_QOAT_PHYS_MEDIA_COPPER: link_info->port = PORT_TP; link_info->link_mode = QETH_LINK_MODE_UNKNOWN; break; case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT: link_info->port = PORT_FIBRE; link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT; break; case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG: link_info->port = PORT_FIBRE; link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG; break; default: link_info->port = PORT_OTHER; link_info->link_mode = QETH_LINK_MODE_UNKNOWN; break; } return 0; } static void qeth_init_link_info(struct qeth_card *card) { qeth_default_link_info(card); /* Get more accurate data via QUERY OAT: */ if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) { struct qeth_link_info link_info; struct qeth_cmd_buffer *iob; iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT, SETADP_DATA_SIZEOF(query_oat)); if (iob) { struct qeth_ipa_cmd *cmd = __ipa_cmd(iob); struct qeth_query_oat *oat_req; oat_req = &cmd->data.setadapterparms.data.query_oat; oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE; if (!qeth_send_ipa_cmd(card, iob, qeth_init_link_info_oat_cb, &link_info)) { if (link_info.speed != SPEED_UNKNOWN) card->info.link_info.speed = link_info.speed; if (link_info.duplex != DUPLEX_UNKNOWN) card->info.link_info.duplex = link_info.duplex; if (link_info.port != PORT_OTHER) card->info.link_info.port = link_info.port; if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN) card->info.link_info.link_mode = link_info.link_mode; } } } } /** * qeth_vm_request_mac() - Request a hypervisor-managed MAC address * @card: pointer to a qeth_card * * Returns * 0, if a MAC address has been set for the card's netdevice * a return code, for various error conditions */ int qeth_vm_request_mac(struct qeth_card *card) { struct diag26c_mac_resp *response; struct diag26c_mac_req *request; int rc; QETH_CARD_TEXT(card, 2, "vmreqmac"); request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA); response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA); if (!request || !response) { rc = -ENOMEM; goto out; } request->resp_buf_len = sizeof(*response); request->resp_version = DIAG26C_VERSION2; request->op_code = DIAG26C_GET_MAC; request->devno = card->info.ddev_devno; QETH_DBF_HEX(CTRL, 2, request, sizeof(*request)); rc = diag26c(request, response, DIAG26C_MAC_SERVICES); QETH_DBF_HEX(CTRL, 2, request, sizeof(*request)); if (rc) goto out; QETH_DBF_HEX(CTRL, 2, response, sizeof(*response)); if (request->resp_buf_len < sizeof(*response) || response->version != request->resp_version) { rc = -EIO; QETH_CARD_TEXT(card, 2, "badresp"); QETH_CARD_HEX(card, 2, &request->resp_buf_len, sizeof(request->resp_buf_len)); } else if (!is_valid_ether_addr(response->mac)) { rc = -EINVAL; QETH_CARD_TEXT(card, 2, "badmac"); QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN); } else { eth_hw_addr_set(card->dev, response->mac); } out: kfree(response); kfree(request); return rc; } EXPORT_SYMBOL_GPL(qeth_vm_request_mac); static void qeth_determine_capabilities(struct qeth_card *card) { struct qeth_channel *channel = &card->data; struct ccw_device *ddev = channel->ccwdev; int rc; int ddev_offline = 0; QETH_CARD_TEXT(card, 2, "detcapab"); if (!ddev->online) { ddev_offline = 1; rc = qeth_start_channel(channel); if (rc) { QETH_CARD_TEXT_(card, 2, "3err%d", rc); goto out; } } rc = qeth_read_conf_data(card); if (rc) { QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n", CARD_DEVID(card), rc); QETH_CARD_TEXT_(card, 2, "5err%d", rc); goto out_offline; } rc = qdio_get_ssqd_desc(ddev, &card->ssqd); if (rc) QETH_CARD_TEXT_(card, 2, "6err%d", rc); QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt); QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1); QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2); QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3); QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt); if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) || ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) || ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) { dev_info(&card->gdev->dev, "Completion Queueing supported\n"); } else { card->options.cq = QETH_CQ_NOTAVAILABLE; } out_offline: if (ddev_offline == 1) qeth_stop_channel(channel); out: return; } static void qeth_read_ccw_conf_data(struct qeth_card *card) { struct qeth_card_info *info = &card->info; struct ccw_device *cdev = CARD_DDEV(card); struct ccw_dev_id dev_id; QETH_CARD_TEXT(card, 2, "ccwconfd"); ccw_device_get_id(cdev, &dev_id); info->ddev_devno = dev_id.devno; info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) && !ccw_device_get_iid(cdev, &info->iid) && !ccw_device_get_chid(cdev, 0, &info->chid); info->ssid = dev_id.ssid; dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n", info->chid, info->chpid); QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno); QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid); QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid); QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid); QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid); QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid); QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid); } static int qeth_qdio_establish(struct qeth_card *card) { struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES]; struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES]; struct qeth_qib_parms *qib_parms = NULL; struct qdio_initialize init_data; unsigned int no_input_qs = 1; unsigned int i; int rc = 0; QETH_CARD_TEXT(card, 2, "qdioest"); if (!IS_IQD(card) && !IS_VM_NIC(card)) { qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL); if (!qib_parms) return -ENOMEM; qeth_fill_qib_parms(card, qib_parms); } in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs; if (card->options.cq == QETH_CQ_ENABLED) { in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs; no_input_qs++; } for (i = 0; i < card->qdio.no_out_queues; i++) out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs; memset(&init_data, 0, sizeof(struct qdio_initialize)); init_data.q_format = IS_IQD(card) ? QDIO_IQDIO_QFMT : QDIO_QETH_QFMT; init_data.qib_param_field_format = 0; init_data.qib_param_field = (void *)qib_parms; init_data.no_input_qs = no_input_qs; init_data.no_output_qs = card->qdio.no_out_queues; init_data.input_handler = qeth_qdio_input_handler; init_data.output_handler = qeth_qdio_output_handler; init_data.irq_poll = qeth_qdio_poll; init_data.int_parm = (unsigned long) card; init_data.input_sbal_addr_array = in_sbal_ptrs; init_data.output_sbal_addr_array = out_sbal_ptrs; if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED, QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) { rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs, init_data.no_output_qs); if (rc) { atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED); goto out; } rc = qdio_establish(CARD_DDEV(card), &init_data); if (rc) { atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED); qdio_free(CARD_DDEV(card)); } } switch (card->options.cq) { case QETH_CQ_ENABLED: dev_info(&card->gdev->dev, "Completion Queue support enabled"); break; case QETH_CQ_DISABLED: dev_info(&card->gdev->dev, "Completion Queue support disabled"); break; default: break; } out: kfree(qib_parms); return rc; } static void qeth_core_free_card(struct qeth_card *card) { QETH_CARD_TEXT(card, 2, "freecrd"); unregister_service_level(&card->qeth_service_level); debugfs_remove_recursive(card->debugfs); qeth_put_cmd(card->read_cmd); destroy_workqueue(card->event_wq); dev_set_drvdata(&card->gdev->dev, NULL); kfree(card); } static void qeth_trace_features(struct qeth_card *card) { QETH_CARD_TEXT(card, 2, "features"); 2,&>java.lang.StringIndexOutOfBoundsException: Range [39, 38) out of bounds for QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6)); QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp)); QETH_CARD_HEX(card, 2, &card->info.diagass_support, sizeof(card->info.diagass_support)); } static struct ccw_device_id qeth_ids[] = { {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01), .driver_info = QETH_CARD_TYPE_OSD}, {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05), .driver_info = QETH_CARD_TYPE_IQD}, {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03), .driver_info = QETH_CARD_TYPE_OSM}, #ifdef CONFIG_QETH_OSX {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02), .driver_info = QETH_CARD_TYPE_OSX}, #endif {}, }; MODULE_DEVICE_TABLE(ccw, qeth_ids); static struct ccw_driver qeth_ccw_driver = { .driver = { .owner = THIS_MODULE, .name = "qeth", }, .ids = qeth_ids, .probe = ccwgroup_probe_ccwdev, .remove = ccwgroup_remove_ccwdev, }; static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok) { int retries = 3; int rc; QETH_CARD_TEXT(card, 2, "hrdsetup"); atomic_set(&card->force_alloc_skb, 0); rc = qeth_update_from_chp_desc(card); if (rc) return rc; retry: if (retries < 3) QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n", CARD_DEVID(card)); rc = qeth_qdio_clear_card(card, !IS_IQD(card)); qeth_stop_channel(&card->data); qeth_stop_channel(&card->write); qeth_stop_channel(&card->read); qdio_free(CARD_DDEV(card)); rc = qeth_start_channel(&card->read); if (rc) goto retriable; rc = qeth_start_channel(&card->write); if (rc) goto retriable; rc = qeth_start_channel(&card->data); if (rc) goto retriable; retriable: if (rc == -ERESTARTSYS) { QETH_CARD_TEXT(card, 2, "break1"); return rc; } else if (rc) { QETH_CARD_TEXT_(card, 2, "1err%d", rc); if (--retries < 0) goto out; else goto retry; } qeth_determine_capabilities(card); qeth_read_ccw_conf_data(card); qeth_idx_init(card); rc = qeth_idx_activate_read_channel(card); if (rc == -EINTR) { QETH_CARD_TEXT(card, 2, "break2"); return rc; } else if (rc) { QETH_CARD_TEXT_(card, 2, "3err%d", rc); if (--retries < 0) goto out; else goto retry; } rc = qeth_idx_activate_write_channel(card); if (rc == -EINTR) { QETH_CARD_TEXT(card, 2, "break3"); return rc; } else if (rc) { QETH_CARD_TEXT_(card, 2, "4err%d", rc); if (--retries < 0) goto out; else goto retry; } card->read_or_write_problem = 0; rc = qeth_mpc_initialize(card); if (rc) { QETH_CARD_TEXT_(card, 2, "5err%d", rc); goto out; } rc = qeth_send_startlan(card); if (rc) { QETH_CARD_TEXT_(card, 2, "6err%d", rc); if (rc == -ENETDOWN) { dev_warn(&card->gdev->dev, "The LAN is offline\n"); *carrier_ok = false; } else { goto out; } } else { *carrier_ok = true; } card->options.ipa4.supported = 0; card->options.ipa6.supported = 0; card->options.adp.supported = 0; card->options.sbp.supported_funcs = 0; card->info.diagass_support = 0; rc = qeth_query_ipassists(card, QETH_PROT_IPV4); if (rc == -ENOMEM) goto out; if (qeth_is_supported(card, IPA_IPV6)) { rc = qeth_query_ipassists(card, QETH_PROT_IPV6); if (rc == -ENOMEM) goto out; } if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) { rc = qeth_query_setadapterparms(card); if (rc < 0) { QETH_CARD_TEXT_(card, 2, "7err%d", rc); goto out; } } if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) { rc = qeth_query_setdiagass(card); if (rc) QETH_CARD_TEXT_(card, 2, "8err%d", rc); } qeth_trace_features(card); if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) || (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))) card->info.hwtrap = 0; if (card->options.isolation != ISOLATION_MODE_NONE) { rc = qeth_setadpparms_set_access_ctrl(card, card->options.isolation); if (rc) goto out; } qeth_init_link_info(card); rc = qeth_init_qdio_queues(card); if (rc) { QETH_CARD_TEXT_(card, 2, "9err%d", rc); goto out; } return 0; out: dev_warn(&card->gdev->dev, "The qeth device driver failed to recover " "an error on the device\n"); QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n", CARD_DEVID(card), rc); return rc; } static int qeth_set_online(struct qeth_card *card, const struct qeth_discipline *disc) { bool carrier_ok; int rc; mutex_lock(&card->conf_mutex); QETH_CARD_TEXT(card, 2, "setonlin"); rc = qeth_hardsetup_card(card, &carrier_ok); if (rc) { QETH_CARD_TEXT_(card, 2, "2err%04x", rc); rc = -ENODEV; goto err_hardsetup; } qeth_print_status_message(card); if (card->dev->reg_state != NETREG_REGISTERED) /* no need for locking / error handling at this early stage: */ qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card)); rc = disc->set_online(card, carrier_ok); if (rc) goto err_online; /* let user_space know that device is online */ kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE); mutex_unlock(&card->conf_mutex); return 0; err_online: err_hardsetup: qeth_qdio_clear_card(card, 0); qeth_clear_working_pool_list(card); qeth_flush_local_addrs(card); qeth_stop_channel(&card->data); qeth_stop_channel(&card->write); qeth_stop_channel(&card->read); qdio_free(CARD_DDEV(card)); mutex_unlock(&card->conf_mutex); return rc; } int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc, bool resetting) { int rc, rc2, rc3; mutex_lock(&card->conf_mutex); QETH_CARD_TEXT(card, 3, "setoffl"); if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) { qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM); card->info.hwtrap = 1; } /* cancel any stalled cmd that might block the rtnl: */ qeth_clear_ipacmd_list(card); rtnl_lock(); netif_device_detach(card->dev); netif_carrier_off(card->dev); rtnl_unlock(); cancel_work_sync(&card->rx_mode_work); disc->set_offline(card); qeth_qdio_clear_card(card, 0); qeth_drain_output_queues(card); qeth_clear_working_pool_list(card); qeth_flush_local_addrs(card); card->info.promisc_mode = 0; qeth_default_link_info(card); rc = qeth_stop_channel(&card->data); rc2 = qeth_stop_channel(&card->write); rc3 = qeth_stop_channel(&card->read); if (!rc) rc = (rc2) ? rc2 : rc3; if (rc) QETH_CARD_TEXT_(card, 2, "1err%d", rc); qdio_free(CARD_DDEV(card)); /* let user_space know that device is offline */ kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE); mutex_unlock(&card->conf_mutex); return 0; } EXPORT_SYMBOL_GPL(qeth_set_offline); static int qeth_do_reset(void *data) { const struct qeth_discipline *disc; struct qeth_card *card = data; int rc; /* Lock-free, other users will block until we are done. */ disc = card->discipline; QETH_CARD_TEXT(card, 2, "recover1"); if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD)) return 0; QETH_CARD_TEXT(card, 2, "recover2"); dev_warn(&card->gdev->dev, "A recovery process has been started for the device\n"); qeth_set_offline(card, disc, true); rc = qeth_set_online(card, disc); if (!rc) { dev_info(&card->gdev->dev, "Device successfully recovered!\n"); } else { qeth_set_offline(card, disc, true); ccwgroup_set_offline(card->gdev, false); dev_warn(&card->gdev->dev, "The qeth device driver failed to recover an error on the device\n"); } qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD); qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD); return 0; } #if IS_ENABLED(CONFIG_QETH_L3) static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb, struct qeth_hdr *hdr) { struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data; struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3; struct net_device *dev = skb->dev; if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) { dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr, "FAKELL", skb->len); return; } if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) { u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 : ETH_P_IP; unsigned char tg_addr[ETH_ALEN]; skb_reset_network_header(skb); switch (l3_hdr->flags & QETH_HDR_CAST_MASK) { case QETH_CAST_MULTICAST: if (prot == ETH_P_IP) ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr); else ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr); QETH_CARD_STAT_INC(card, rx_multicast); break; case QETH_CAST_BROADCAST: ether_addr_copy(tg_addr, dev->broadcast); QETH_CARD_STAT_INC(card, rx_multicast); break; default: if (card->options.sniffer) skb->pkt_type = PACKET_OTHERHOST; ether_addr_copy(tg_addr, dev->dev_addr); } if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR) dev_hard_header(skb, dev, prot, tg_addr, &l3_hdr->next_hop.rx.src_mac, skb->len); else dev_hard_header(skb, dev, prot, tg_addr, "FAKELL", skb->len); } /* copy VLAN tag from hdr into skb */ if (!card->options.sniffer && (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME | QETH_HDR_EXT_INCLUDE_VLAN_TAG))) { u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ? l3_hdr->vlan_id : l3_hdr->next_hop.rx.vlan_id; __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag); } } #endif static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb, bool uses_frags, bool is_cso) { struct napi_struct *napi = &card->napi; if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) { skb->ip_summed = CHECKSUM_UNNECESSARY; QETH_CARD_STAT_INC(card, rx_skb_csum); } else { skb->ip_summed = CHECKSUM_NONE; } QETH_CARD_STAT_ADD(card, rx_bytes, skb->len); QETH_CARD_STAT_INC(card, rx_packets); if (skb_is_nonlinear(skb)) { QETH_CARD_STAT_INC(card, rx_sg_skbs); QETH_CARD_STAT_ADD(card, rx_sg_frags, skb_shinfo(skb)->nr_frags); } if (uses_frags) { napi_gro_frags(napi); } else { skb->protocol = eth_type_trans(skb, skb->dev); napi_gro_receive(napi, skb); } } static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len) { struct page *page = virt_to_page(data); unsigned int next_frag; next_frag = skb_shinfo(skb)->nr_frags; get_page(page); skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len, data_len); } static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale) { return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY); } static int qeth_extract_skb(struct qeth_card *card, struct qeth_qdio_buffer *qethbuffer, u8 *element_no, int *__offset) { struct qeth_priv *priv = netdev_priv(card->dev); struct qdio_buffer *buffer = qethbuffer->buffer; struct napi_struct *napi = &card->napi; struct qdio_buffer_element *element; unsigned int linear_len = 0; bool uses_frags = false; int offset = *__offset; bool use_rx_sg = false; unsigned int headroom; struct qeth_hdr *hdr; struct sk_buff *skb; int skb_len = 0; bool is_cso; element = &buffer->element[*element_no]; next_packet: /* qeth_hdr must not cross element boundaries */ while (element->length < offset + sizeof(struct qeth_hdr)) { if (qeth_is_last_sbale(element)) return -ENODATA; element++; offset = 0; } hdr = dma64_to_virt(element->addr) + offset; offset += sizeof(*hdr); skb = NULL; switch (hdr->hdr.l2.id) { case QETH_HEADER_TYPE_LAYER2: skb_len = hdr->hdr.l2.pkt_length; is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ; linear_len = ETH_HLEN; headroom = 0; break; case QETH_HEADER_TYPE_LAYER3: skb_len = hdr->hdr.l3.length; is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ; if (!IS_LAYER3(card)) { QETH_CARD_STAT_INC(card, rx_dropped_notsupp); goto walk_packet; } if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) { linear_len = ETH_HLEN; headroom = 0; break; } if (hdr->hdr.l3.flags & QETH_HDR_IPV6) linear_len = sizeof(struct ipv6hdr); else linear_len = sizeof(struct iphdr); headroom = ETH_HLEN; break; default: if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL) QETH_CARD_STAT_INC(card, rx_frame_errors); else QETH_CARD_STAT_INC(card, rx_dropped_notsupp); /* Can't determine packet length, drop the whole buffer. */ return -EPROTONOSUPPORT; } if (skb_len < linear_len) { QETH_CARD_STAT_INC(card, rx_dropped_runt); goto walk_packet; } use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) || (skb_len > READ_ONCE(priv->rx_copybreak) && !atomic_read(&card->force_alloc_skb)); if (use_rx_sg) { /* QETH_CQ_ENABLED only: */ if (qethbuffer->rx_skb && skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) { skb = qethbuffer->rx_skb; qethbuffer->rx_skb = NULL; goto use_skb; } skb = napi_get_frags(napi); if (!skb) { /* -ENOMEM, no point in falling back further. */ QETH_CARD_STAT_INC(card, rx_dropped_nomem); goto walk_packet; } if (skb_tailroom(skb) >= linear_len + headroom) { uses_frags = true; goto use_skb; } netdev_info_once(card->dev, "Insufficient linear space in NAPI frags skb, need %u but have %u\n", linear_len + headroom, skb_tailroom(skb)); /* Shouldn't happen. Don't optimize, fall back to linear skb. */ } linear_len = skb_len; skb = napi_alloc_skb(napi, linear_len + headroom); if (!skb) { QETH_CARD_STAT_INC(card, rx_dropped_nomem); goto walk_packet; } use_skb: if (headroom) skb_reserve(skb, headroom); walk_packet: while (skb_len) { int data_len = min(skb_len, (int)(element->length - offset)); char *data = dma64_to_virt(element->addr) + offset; skb_len -= data_len; offset += data_len; /* Extract data from current element: */ if (skb && data_len) { if (linear_len) { unsigned int copy_len; copy_len = min_t(unsigned int, linear_len, data_len); skb_put_data(skb, data, copy_len); linear_len -= copy_len; data_len -= copy_len; data += copy_len; } if (data_len) qeth_create_skb_frag(skb, data, data_len); } /* Step forward to next element: */ if (skb_len) { if (qeth_is_last_sbale(element)) { QETH_CARD_TEXT(card, 4, "unexeob"); QETH_CARD_HEX(card, 2, buffer, sizeof(void *)); if (skb) { if (uses_frags) napi_free_frags(napi); else kfree_skb(skb); QETH_CARD_STAT_INC(card, rx_length_errors); } return -EMSGSIZE; } element++; offset = 0; } } /* This packet was skipped, go get another one: */ if (!skb) goto next_packet; *element_no = element - &buffer->element[0]; *__offset = offset; #if IS_ENABLED(CONFIG_QETH_L3) if (hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER3) qeth_l3_rebuild_skb(card, skb, hdr); #endif qeth_receive_skb(card, skb, uses_frags, is_cso); return 0; } static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget, struct qeth_qdio_buffer *buf, bool *done) { unsigned int work_done = 0; while (budget) { if (qeth_extract_skb(card, buf, &card->rx.buf_element, &card->rx.e_offset)) { *done = true; break; } work_done++; budget--; } return work_done; } static unsigned int qeth_rx_poll(struct qeth_card *card, int budget) { struct qeth_rx *ctx = &card->rx; unsigned int work_done = 0; while (budget > 0) { struct qeth_qdio_buffer *buffer; unsigned int skbs_done = 0; bool done = false; /* Fetch completed RX buffers: */ if (!card->rx.b_count) { card->rx.qdio_err = 0; card->rx.b_count = qdio_inspect_input_queue(CARD_DDEV(card), 0, &card->rx.b_index, &card->rx.qdio_err); if (card->rx.b_count <= 0) { card->rx.b_count = 0; break; } } /* Process one completed RX buffer: */ buffer = &card->qdio.in_q->bufs[card->rx.b_index]; if (!(card->rx.qdio_err && qeth_check_qdio_errors(card, buffer->buffer, card->rx.qdio_err, "qinerr"))) skbs_done = qeth_extract_skbs(card, budget, buffer, &done); else done = true; work_done += skbs_done; budget -= skbs_done; if (done) { QETH_CARD_STAT_INC(card, rx_bufs); qeth_put_buffer_pool_entry(card, buffer->pool_entry); buffer->pool_entry = NULL; card->rx.b_count--; ctx->bufs_refill++; ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill); /* Step forward to next buffer: */ card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1); card->rx.buf_element = 0; card->rx.e_offset = 0; } } return work_done; } static void qeth_cq_poll(struct qeth_card *card) { unsigned int work_done = 0; while (work_done < QDIO_MAX_BUFFERS_PER_Q) { unsigned int start, error; int completed; completed = qdio_inspect_input_queue(CARD_DDEV(card), 1, &start, &error); if (completed <= 0) return; qeth_qdio_cq_handler(card, error, 1, start, completed); work_done += completed; } } int qeth_poll(struct napi_struct *napi, int budget) { struct qeth_card *card = container_of(napi, struct qeth_card, napi); unsigned int work_done; work_done = qeth_rx_poll(card, budget); if (qeth_use_tx_irqs(card)) { struct qeth_qdio_out_q *queue; unsigned int i; qeth_for_each_output_queue(card, queue, i) { if (!qeth_out_queue_is_empty(queue)) napi_schedule(&queue->napi); } } if (card->options.cq == QETH_CQ_ENABLED) qeth_cq_poll(card); if (budget) { struct qeth_rx *ctx = &card->rx; /* Process any substantial refill backlog: */ ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill); /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */ if (work_done >= budget) return work_done; } if (napi_complete_done(napi, work_done) && qdio_start_irq(CARD_DDEV(card))) napi_schedule(napi); return work_done; } EXPORT_SYMBOL_GPL(qeth_poll); static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue, unsigned int bidx, unsigned int qdio_error, int budget) { struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx]; u8 sflags = buffer->buffer->element[15].sflags; struct qeth_card *card = queue->card; bool error = !!qdio_error; if (qdio_error == QDIO_ERROR_SLSB_PENDING) { struct qaob *aob = buffer->aob; struct qeth_qaob_priv1 *priv; enum iucv_tx_notify notify; if (!aob) { netdev_WARN_ONCE(card->dev, "Pending TX buffer %#x without QAOB on TX queue %u\n", bidx, queue->queue_no); qeth_schedule_recovery(card); return; } QETH_CARD_TEXT_(card, 5, "pel%u", bidx); priv = (struct qeth_qaob_priv1 *)&aob->user1; /* QAOB hasn't completed yet: */ if (xchg(&priv->state, QETH_QAOB_PENDING) != QETH_QAOB_DONE) { qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING); /* Prepare the queue slot for immediate re-use: */ qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements); if (qeth_alloc_out_buf(queue, bidx, GFP_ATOMIC)) { QETH_CARD_TEXT(card, 2, "outofbuf"); qeth_schedule_recovery(card); } list_add(&buffer->list_entry, &queue->pending_bufs); /* Skip clearing the buffer: */ return; } /* QAOB already completed: */ notify = qeth_compute_cq_notification(aob->aorc, 0); qeth_notify_skbs(queue, buffer, notify); error = !!aob->aorc; memset(aob, 0, sizeof(*aob)); } else if (card->options.cq == QETH_CQ_ENABLED) { qeth_notify_skbs(queue, buffer, qeth_compute_cq_notification(sflags, 0)); } qeth_clear_output_buffer(queue, buffer, error, budget); } static int qeth_tx_poll(struct napi_struct *napi, int budget) { struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi); unsigned int queue_no = queue->queue_no; struct qeth_card *card = queue->card; struct net_device *dev = card->dev; unsigned int work_done = 0; struct netdev_queue *txq; if (IS_IQD(card)) txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no)); else txq = netdev_get_tx_queue(dev, queue_no); while (1) { unsigned int start, error, i; unsigned int packets = 0; unsigned int bytes = 0; int completed; qeth_tx_complete_pending_bufs(card, queue, false, budget); if (qeth_out_queue_is_empty(queue)) { napi_complete(napi); return 0; } /* Give the CPU a breather: */ if (work_done >= QDIO_MAX_BUFFERS_PER_Q) { QETH_TXQ_STAT_INC(queue, completion_yield); if (napi_complete_done(napi, 0)) napi_schedule(napi); return 0; } completed = qdio_inspect_output_queue(CARD_DDEV(card), queue_no, &start, &error); if (completed <= 0) { /* Ensure we see TX completion for pending work: */ if (napi_complete_done(napi, 0) && !atomic_read(&queue->set_pci_flags_count)) qeth_tx_arm_timer(queue, queue->rescan_usecs); return 0; } for (i = start; i < start + completed; i++) { struct qeth_qdio_out_buffer *buffer; unsigned int bidx = QDIO_BUFNR(i); buffer = queue->bufs[bidx]; packets += buffer->frames; bytes += buffer->bytes; qeth_handle_send_error(card, buffer, error); if (IS_IQD(card)) qeth_iqd_tx_complete(queue, bidx, error, budget); else qeth_clear_output_buffer(queue, buffer, error, budget); } atomic_sub(completed, &queue->used_buffers); work_done += completed; if (IS_IQD(card)) netdev_tx_completed_queue(txq, packets, bytes); else qeth_check_outbound_queue(queue); /* xmit may have observed the full-condition, but not yet * stopped the txq. In which case the code below won't trigger. * So before returning, xmit will re-check the txq's fill level * and wake it up if needed. */ if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue)) netif_tx_wake_queue(txq); } } static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd) { if (!cmd->hdr.return_code) cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code; return cmd->hdr.return_code; } static int qeth_setassparms_get_caps_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; struct qeth_ipa_caps *caps = reply->param; if (qeth_setassparms_inspect_rc(cmd)) return -EIO; caps->supported = cmd->data.setassparms.data.caps.supported; caps->enabled = cmd->data.setassparms.data.caps.enabled; return 0; } int qeth_setassparms_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; QETH_CARD_TEXT(card, 4, "defadpcb"); if (cmd->hdr.return_code) return -EIO; cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code; if (cmd->hdr.prot_version == QETH_PROT_IPV4) card->options.ipa4.enabled = cmd->hdr.assists.enabled; if (cmd->hdr.prot_version == QETH_PROT_IPV6) card->options.ipa6.enabled = cmd->hdr.assists.enabled; return 0; } EXPORT_SYMBOL_GPL(qeth_setassparms_cb); struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card, enum qeth_ipa_funcs ipa_func, u16 cmd_code, unsigned int data_length, enum qeth_prot_versions prot) { struct qeth_ipacmd_setassparms *setassparms; struct qeth_ipacmd_setassparms_hdr *hdr; struct qeth_cmd_buffer *iob; QETH_CARD_TEXT(card, 4, "getasscm"); iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot, data_length + offsetof(struct qeth_ipacmd_setassparms, data)); if (!iob) return NULL; setassparms = &__ipa_cmd(iob)->data.setassparms; setassparms->assist_no = ipa_func; hdr = &setassparms->hdr; hdr->length = sizeof(*hdr) + data_length; hdr->command_code = cmd_code; return iob; } EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd); int qeth_send_simple_setassparms_prot(struct qeth_card *card, enum qeth_ipa_funcs ipa_func, u16 cmd_code, u32 *data, enum qeth_prot_versions prot) { unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0; struct qeth_cmd_buffer *iob; QETH_CARD_TEXT_(card, 4, "simassp%i", prot); iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot); if (!iob) return -ENOMEM; if (data) __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data; return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL); } EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot); static void qeth_unregister_dbf_views(void) { int x; for (x = 0; x < QETH_DBF_INFOS; x++) { debug_unregister(qeth_dbf[x].id); qeth_dbf[x].id = NULL; } } void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...) { char dbf_txt_buf[32]; va_list args; if (!debug_level_enabled(id, level)) return; va_start(args, fmt); vscnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args); va_end(args); debug_text_event(id, level, dbf_txt_buf); } EXPORT_SYMBOL_GPL(qeth_dbf_longtext); static int qeth_register_dbf_views(void) { int ret; int x; for (x = 0; x < QETH_DBF_INFOS; x++) { /* register the areas */ qeth_dbf[x].id = debug_register(qeth_dbf[x].name, qeth_dbf[x].pages, qeth_dbf[x].areas, qeth_dbf[x].len); if (qeth_dbf[x].id == NULL) { qeth_unregister_dbf_views(); return -ENOMEM; } /* register a view */ ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view); if (ret) { qeth_unregister_dbf_views(); return ret; } /* set a passing level */ debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level); } return 0; } static DEFINE_MUTEX(qeth_mod_mutex); /* for synchronized module loading */ int qeth_setup_discipline(struct qeth_card *card, enum qeth_discipline_id discipline) { int rc; mutex_lock(&qeth_mod_mutex); switch (discipline) { case QETH_DISCIPLINE_LAYER3: card->discipline = try_then_request_module( symbol_get(qeth_l3_discipline), "qeth_l3"); break; case QETH_DISCIPLINE_LAYER2: card->discipline = try_then_request_module( symbol_get(qeth_l2_discipline), "qeth_l2"); break; default: break; } mutex_unlock(&qeth_mod_mutex); if (!card->discipline) { dev_err(&card->gdev->dev, "There is no kernel module to " "support discipline %d\n", discipline); return -EINVAL; } rc = card->discipline->setup(card->gdev); if (rc) { if (discipline == QETH_DISCIPLINE_LAYER2) symbol_put(qeth_l2_discipline); else symbol_put(qeth_l3_discipline); card->discipline = NULL; return rc; } card->options.layer = discipline; return 0; } void qeth_remove_discipline(struct qeth_card *card) { card->discipline->remove(card->gdev); if (IS_LAYER2(card)) symbol_put(qeth_l2_discipline); else symbol_put(qeth_l3_discipline); card->options.layer = QETH_DISCIPLINE_UNDETERMINED; card->discipline = NULL; } static const struct device_type qeth_generic_devtype = { .name = "qeth_generic", }; #define DBF_NAME_LEN 20 struct qeth_dbf_entry { char dbf_name[DBF_NAME_LEN]; debug_info_t *dbf_info; struct list_head dbf_list; }; static LIST_HEAD(qeth_dbf_list); static DEFINE_MUTEX(qeth_dbf_list_mutex); static debug_info_t *qeth_get_dbf_entry(char *name) { struct qeth_dbf_entry *entry; debug_info_t *rc = NULL; mutex_lock(&qeth_dbf_list_mutex); list_for_each_entry(entry, &qeth_dbf_list, dbf_list) { if (strcmp(entry->dbf_name, name) == 0) { rc = entry->dbf_info; break; } } mutex_unlock(&qeth_dbf_list_mutex); return rc; } static int qeth_add_dbf_entry(struct qeth_card *card, char *name) { struct qeth_dbf_entry *new_entry; card->debug = debug_register(name, 2, 1, 8); if (!card->debug) { QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf"); goto err; } if (debug_register_view(card->debug, &debug_hex_ascii_view)) goto err_dbg; new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL); if (!new_entry) goto err_dbg; strscpy(new_entry->dbf_name, name, sizeof(new_entry->dbf_name)); new_entry->dbf_info = card->debug; mutex_lock(&qeth_dbf_list_mutex); list_add(&new_entry->dbf_list, &qeth_dbf_list); mutex_unlock(&qeth_dbf_list_mutex); return 0; err_dbg: debug_unregister(card->debug); err: return -ENOMEM; } static void qeth_clear_dbf_list(void) { struct qeth_dbf_entry *entry, *tmp; mutex_lock(&qeth_dbf_list_mutex); list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) { list_del(&entry->dbf_list); debug_unregister(entry->dbf_info); kfree(entry); } mutex_unlock(&qeth_dbf_list_mutex); } static struct net_device *qeth_alloc_netdev(struct qeth_card *card) { struct net_device *dev; struct qeth_priv *priv; switch (card->info.type) { case QETH_CARD_TYPE_IQD: dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN, ether_setup, QETH_MAX_OUT_QUEUES, 1); break; case QETH_CARD_TYPE_OSM: dev = alloc_etherdev(sizeof(*priv)); break; default: dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1); } if (!dev) return NULL; priv = netdev_priv(dev); priv->rx_copybreak = QETH_RX_COPYBREAK; priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1; dev->ml_priv = card; dev->watchdog_timeo = QETH_TX_TIMEOUT; dev->min_mtu = 576; /* initialized when device first goes online: */ dev->max_mtu = 0; dev->mtu = 0; SET_NETDEV_DEV(dev, &card->gdev->dev); netif_carrier_off(dev); dev->ethtool_ops = &qeth_ethtool_ops; dev->priv_flags &= ~IFF_TX_SKB_SHARING; dev->hw_features |= NETIF_F_SG; dev->vlan_features |= NETIF_F_SG; if (IS_IQD(card)) dev->features |= NETIF_F_SG; return dev; } struct net_device *qeth_clone_netdev(struct net_device *orig) { struct net_device *clone = qeth_alloc_netdev(orig->ml_priv); if (!clone) return NULL; clone->dev_port = orig->dev_port; return clone; } static int qeth_core_probe_device(struct ccwgroup_device *gdev) { struct qeth_card *card; struct device *dev; int rc; enum qeth_discipline_id enforced_disc; char dbf_name[DBF_NAME_LEN]; QETH_DBF_TEXT(SETUP, 2, "probedev"); dev = &gdev->dev; if (!get_device(dev)) return -ENODEV; QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev)); card = qeth_alloc_card(gdev); if (!card) { QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM); rc = -ENOMEM; goto err_dev; } scnprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s", dev_name(&gdev->dev)); card->debug = qeth_get_dbf_entry(dbf_name); if (!card->debug) { rc = qeth_add_dbf_entry(card, dbf_name); if (rc) goto err_card; } qeth_setup_card(card); card->dev = qeth_alloc_netdev(card); if (!card->dev) { rc = -ENOMEM; goto err_card; } qeth_determine_capabilities(card); qeth_set_blkt_defaults(card); card->qdio.in_q = qeth_alloc_qdio_queue(); if (!card->qdio.in_q) { rc = -ENOMEM; goto err_rx_queue; } card->qdio.no_out_queues = card->dev->num_tx_queues; rc = qeth_update_from_chp_desc(card); if (rc) goto err_chp_desc; gdev->dev.groups = qeth_dev_groups; enforced_disc = qeth_enforce_discipline(card); switch (enforced_disc) { case QETH_DISCIPLINE_UNDETERMINED: gdev->dev.type = &qeth_generic_devtype; break; default: card->info.layer_enforced = true; /* It's so early that we don't need the discipline_mutex yet. */ rc = qeth_setup_discipline(card, enforced_disc); if (rc) goto err_setup_disc; break; } return 0; err_setup_disc: err_chp_desc: qeth_free_qdio_queue(card->qdio.in_q); err_rx_queue: free_netdev(card->dev); err_card: qeth_core_free_card(card); err_dev: put_device(dev); return rc; } static void qeth_core_remove_device(struct ccwgroup_device *gdev) { struct qeth_card *card = dev_get_drvdata(&gdev->dev); QETH_CARD_TEXT(card, 2, "removedv"); mutex_lock(&card->discipline_mutex); if (card->discipline) qeth_remove_discipline(card); mutex_unlock(&card->discipline_mutex); qeth_free_qdio_queues(card); qeth_free_qdio_queue(card->qdio.in_q); free_netdev(card->dev); qeth_core_free_card(card); put_device(&gdev->dev); } static int qeth_core_set_online(struct ccwgroup_device *gdev) { struct qeth_card *card = dev_get_drvdata(&gdev->dev); int rc = 0; enum qeth_discipline_id def_discipline; mutex_lock(&card->discipline_mutex); if (!card->discipline) { def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 : QETH_DISCIPLINE_LAYER2; rc = qeth_setup_discipline(card, def_discipline); if (rc) goto err; } rc = qeth_set_online(card, card->discipline); err: mutex_unlock(&card->discipline_mutex); return rc; } static int qeth_core_set_offline(struct ccwgroup_device *gdev) { struct qeth_card *card = dev_get_drvdata(&gdev->dev); int rc; mutex_lock(&card->discipline_mutex); rc = qeth_set_offline(card, card->discipline, false); mutex_unlock(&card->discipline_mutex); return rc; } static void qeth_core_shutdown(struct ccwgroup_device *gdev) { struct qeth_card *card = dev_get_drvdata(&gdev->dev); qeth_set_allowed_threads(card, 0, 1); if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap) qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM); qeth_qdio_clear_card(card, 0); qeth_drain_output_queues(card); qdio_free(CARD_DDEV(card)); } static ssize_t group_store(struct device_driver *ddrv, const char *buf, size_t count) { int err; err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3, buf); return err ? err : count; } static DRIVER_ATTR_WO(group); static struct attribute *qeth_drv_attrs[] = { &driver_attr_group.attr, NULL, }; static struct attribute_group qeth_drv_attr_group = { .attrs = qeth_drv_attrs, }; static const struct attribute_group *qeth_drv_attr_groups[] = { &qeth_drv_attr_group, NULL, }; static struct ccwgroup_driver qeth_core_ccwgroup_driver = { .driver = { .groups = qeth_drv_attr_groups, .owner = THIS_MODULE, .name = "qeth", }, .ccw_driver = &qeth_ccw_driver, .setup = qeth_core_probe_device, .remove = qeth_core_remove_device, .set_online = qeth_core_set_online, .set_offline = qeth_core_set_offline, .shutdown = qeth_core_shutdown, }; int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cm { struct qeth_card *card = dev->ml_priv; int rc = 0; switch (cmd) { case SIOC_QETH_ADP_SET_SNMP_CONTROL: rc = qeth_snmp_command(card, data); break; case SIOC_QETH_GET_CARD_TYPE: if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) && !IS_VM_NIC(card)) return 1; return 0; case SIOC_QETH_QUERY_OAT: rc = qeth_query_oat_command(card, data); break; default: rc = -EOPNOTSUPP; } if (rc) QETH_CARD_TEXT_(card, 2, "ioce%x", rc); return rc; } EXPORT_SYMBOL_GPL(qeth_siocdevprivate); int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) { struct qeth_card *card = dev->ml_priv; struct mii_ioctl_data *mii_data; int rc = 0; switch (cmd) { case SIOCGMIIPHY: mii_data = if_mii(rq); mii_data->phy_id = 0; break; case SIOCGMIIREG: mii_data = if_mii(rq); if (mii_data->phy_id != 0) rc = -EINVAL; else mii_data->val_out = qeth_mdio_read(dev, mii_data->phy_id, mii_data->reg_num); break; default: return -EOPNOTSUPP; } if (rc) QETH_CARD_TEXT_(card, 2, "ioce%x", rc); return rc; } EXPORT_SYMBOL_GPL(qeth_do_ioctl); static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; u32 *features = reply->param; if (qeth_setassparms_inspect_rc(cmd)) return -EIO; *features = cmd->data.setassparms.data.flags_32bit; return 0; } static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype, enum qeth_prot_versions prot) { return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP, NULL, prot); } static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype, enum qeth_prot_versions prot, u8 *lp2lp) { u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP; struct qeth_cmd_buffer *iob; struct qeth_ipa_caps caps; u32 features; int rc; /* some L3 HW requires combined L3+L4 csum offload: */ if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 && cstype == IPA_OUTBOUND_CHECKSUM) required_features |= QETH_IPA_CHECKSUM_IP_HDR; iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0, prot); if (!iob) return -ENOMEM; rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features); if (rc) return rc; if ((required_features & features) != required_features) { qeth_set_csum_off(card, cstype, prot); return -EOPNOTSUPP; } iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE, SETASS_DATA_SIZEOF(flags_32bit), prot); if (!iob) { qeth_set_csum_off(card, cstype, prot); return -ENOMEM; } if (features & QETH_IPA_CHECKSUM_LP2LP) required_features |= QETH_IPA_CHECKSUM_LP2LP; __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features; rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps); if (rc) { qeth_set_csum_off(card, cstype, prot); return rc; } if (!qeth_ipa_caps_supported(&caps, required_features) || !qeth_ipa_caps_enabled(&caps, required_features)) { qeth_set_csum_off(card, cstype, prot); return -EOPNOTSUPP; } dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n", cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot); if (lp2lp) *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP); return 0; } static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype, enum qeth_prot_versions prot, u8 *lp2lp) { return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) : qeth_set_csum_off(card, cstype, prot); } static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply, unsigned long data) { struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data; struct qeth_tso_start_data *tso_data = reply->param; if (qeth_setassparms_inspect_rc(cmd)) return -EIO; tso_data->mss = cmd->data.setassparms.data.tso.mss; tso_data->supported = cmd->data.setassparms.data.tso.supported; return 0; } static int qeth_set_tso_off(struct qeth_card *card, enum qeth_prot_versions prot) { return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO, IPA_CMD_ASS_STOP, NULL, prot); } static int qeth_set_tso_on(struct qeth_card *card, enum qeth_prot_versions prot) { struct qeth_tso_start_data tso_data; struct qeth_cmd_buffer *iob; struct qeth_ipa_caps caps; int rc; iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO, IPA_CMD_ASS_START, 0, prot); if (!iob) return -ENOMEM; rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data); if (rc) return rc; if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) { qeth_set_tso_off(card, prot); return -EOPNOTSUPP; } iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO, IPA_CMD_ASS_ENABLE, SETASS_DATA_SIZEOF(caps), prot); if (!iob) { qeth_set_tso_off(card, prot); return -ENOMEM; } /* enable TSO capability */ __ipa_cmd(iob)->data.setassparms.data.caps.enabled = QETH_IPA_LARGE_SEND_TCP; rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps); if (rc) { qeth_set_tso_off(card, prot); return rc; } if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) || !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) { qeth_set_tso_off(card, prot); return -EOPNOTSUPP; } dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot, tso_data.mss); return 0; } static int qeth_set_ipa_tso(struct qeth_card *card, bool on, enum qeth_prot_versions prot) { return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot); } static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on) { int rc_ipv4 = (on) ? -EOPNOTSUPP : 0; int rc_ipv6; if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM, QETH_PROT_IPV4, NULL); if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) /* no/one Offload Assist available, so the rc is trivial */ return rc_ipv4; rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM, QETH_PROT_IPV6, NULL); if (on) /* enable: success if any Assist is active */ return (rc_ipv6) ? rc_ipv4 : 0; /* disable: failure if any Assist is still active */ return (rc_ipv6) ? rc_ipv6 : rc_ipv4; } /** * qeth_enable_hw_features() - (Re-)Enable HW functions for device features * @dev: a net_device */ void qeth_enable_hw_features(struct net_device *dev) { struct qeth_card *card = dev->ml_priv; netdev_features_t features; features = dev->features; /* force-off any feature that might need an IPA sequence. * netdev_update_features() will restart them. */ dev->features &= ~dev->hw_features; /* toggle VLAN filter, so that VIDs are re-programmed: */ if (IS_LAYER2(card) && IS_VM_NIC(card)) { dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER; dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER; } netdev_update_features(dev); if (features != dev->features) dev_warn(&card->gdev->dev, "Device recovery failed to restore all offload features\n"); } EXPORT_SYMBOL_GPL(qeth_enable_hw_features); static void qeth_check_restricted_features(struct qeth_card *card, netdev_features_t changed, netdev_features_t actual) { netdev_features_t ipv6_features = NETIF_F_TSO6; netdev_features_t ipv4_features = NETIF_F_TSO; if (!card->info.has_lp2lp_cso_v6) ipv6_features |= NETIF_F_IPV6_CSUM; if (!card->info.has_lp2lp_cso_v4) ipv4_features |= NETIF_F_IP_CSUM; if ((changed & ipv6_features) && !(actual & ipv6_features)) qeth_flush_local_addrs6(card); if ((changed & ipv4_features) && !(actual & ipv4_features)) qeth_flush_local_addrs4(card); } int qeth_set_features(struct net_device *dev, netdev_features_t features) { struct qeth_card *card = dev->ml_priv; netdev_features_t changed = dev->features ^ features; int rc = 0; QETH_CARD_TEXT(card, 2, "setfeat"); QETH_CARD_HEX(card, 2, &features, sizeof(features)); if ((changed & NETIF_F_IP_CSUM)) { rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM, IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4, &card->info.has_lp2lp_cso_v4); if (rc) changed ^= NETIF_F_IP_CSUM; } if (changed & NETIF_F_IPV6_CSUM) { rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM, IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6, &card->info.has_lp2lp_cso_v6); if (rc) changed ^= NETIF_F_IPV6_CSUM; } if (changed & NETIF_F_RXCSUM) { rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM); if (rc) changed ^= NETIF_F_RXCSUM; } if (changed & NETIF_F_TSO) { rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO, QETH_PROT_IPV4); if (rc) changed ^= NETIF_F_TSO; } if (changed & NETIF_F_TSO6) { rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6, QETH_PROT_IPV6); if (rc) changed ^= NETIF_F_TSO6; } qeth_check_restricted_features(card, dev->features ^ features, dev->features ^ changed); /* everything changed successfully? */ if ((dev->features ^ features) == changed) return 0; /* something went wrong. save changed features and return error */ dev->features ^= changed; return -EIO; } EXPORT_SYMBOL_GPL(qeth_set_features); netdev_features_t qeth_fix_features(struct net_device *dev, netdev_features_t features) { struct qeth_card *card = dev->ml_priv; QETH_CARD_TEXT(card, 2, "fixfeat"); if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) features &= ~NETIF_F_IP_CSUM; if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) features &= ~NETIF_F_IPV6_CSUM; if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) && !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) features &= ~NETIF_F_RXCSUM; if (!qeth_is_supported(card, IPA_OUTBOUND_TSO)) features &= ~NETIF_F_TSO; if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO)) features &= ~NETIF_F_TSO6; QETH_CARD_HEX(card, 2, &features, sizeof(features)); return features; } EXPORT_SYMBOL_GPL(qeth_fix_features); netdev_features_t qeth_features_check(struct sk_buff *skb, struct net_device *dev, netdev_features_t features) { struct qeth_card *card = dev->ml_priv; /* Traffic with local next-hop is not eligible for some offloads: */ if (skb->ip_summed == CHECKSUM_PARTIAL && READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) { netdev_features_t restricted = 0; if (skb_is_gso(skb) && !netif_needs_gso(skb, features)) restricted |= NETIF_F_ALL_TSO; switch (vlan_get_protocol(skb)) { case htons(ETH_P_IP): if (!card->info.has_lp2lp_cso_v4) restricted |= NETIF_F_IP_CSUM; if (restricted && qeth_next_hop_is_local_v4(card, skb)) features &= ~restricted; break; case htons(ETH_P_IPV6): if (!card->info.has_lp2lp_cso_v6) restricted |= NETIF_F_IPV6_CSUM; if (restricted && qeth_next_hop_is_local_v6(card, skb)) features &= ~restricted; break; default: break; } } /* GSO segmentation builds skbs with * a (small) linear part for the headers, and * page frags for the data. * Compared to a linear skb, the header-only part consumes an * additional buffer element. This reduces buffer utilization, and * hurts throughput. So compress small segments into one element. */ if (netif_needs_gso(skb, features)) { /* match skb_segment(): */ unsigned int doffset = skb->data - skb_mac_header(skb); unsigned int hsize = skb_shinfo(skb)->gso_size; unsigned int hroom = skb_headroom(skb); /* linearize only if resulting skb allocations are order-0: */ if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0)) features &= ~NETIF_F_SG; } return vlan_features_check(skb, features); } EXPORT_SYMBOL_GPL(qeth_features_check); void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) { struct qeth_card *card = dev->ml_priv; struct qeth_qdio_out_q *queue; unsigned int i; QETH_CARD_TEXT(card, 5, "getstat"); stats->rx_packets = card->stats.rx_packets; stats->rx_bytes = card->stats.rx_bytes; stats->rx_errors = card->stats.rx_length_errors + card->stats.rx_frame_errors + card->stats.rx_fifo_errors; stats->rx_dropped = card->stats.rx_dropped_nomem + card->stats.rx_dropped_notsupp + card->stats.rx_dropped_runt; stats->multicast = card->stats.rx_multicast; stats->rx_length_errors = card->stats.rx_length_errors; stats->rx_frame_errors = card->stats.rx_frame_errors; stats->rx_fifo_errors = card->stats.rx_fifo_errors; for (i = 0; i < card->qdio.no_out_queues; i++) { queue = card->qdio.out_qs[i]; stats->tx_packets += queue->stats.tx_packets; stats->tx_bytes += queue->stats.tx_bytes; stats->tx_errors += queue->stats.tx_errors; stats->tx_dropped += queue->stats.tx_dropped; } } EXPORT_SYMBOL_GPL(qeth_get_stats64); #define TC_IQD_UCAST 0 static void qeth_iqd_set_prio_tc_map(struct net_device *dev, unsigned int ucast_txqs) { unsigned int prio; /* IQD requires mcast traffic to be placed on a dedicated queue, and * qeth_iqd_select_queue() deals with this. * For unicast traffic, we defer the queue selection to the stack. * By installing a trivial prio map that spans over only the unicast * queues, we can encourage the stack to spread the ucast traffic evenly * without selecting the mcast queue. */ /* One traffic class, spanning over all active ucast queues: */ netdev_set_num_tc(dev, 1); netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs, QETH_IQD_MIN_UCAST_TXQ); /* Map all priorities to this traffic class: */ for (prio = 0; prio <= TC_BITMASK; prio++) netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST); } int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count) { struct net_device *dev = card->dev; int rc; /* Per netif_setup_tc(), adjust the mapping first: */ if (IS_IQD(card)) qeth_iqd_set_prio_tc_map(dev, count - 1); rc = netif_set_real_num_tx_queues(dev, count); if (rc && IS_IQD(card)) qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1); return rc; } EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues); u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb, u8 cast_type, struct net_device *sb_dev) { u16 txq; if (cast_type != RTN_UNICAST) return QETH_IQD_MCAST_TXQ; if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ) return QETH_IQD_MIN_UCAST_TXQ; txq = netdev_pick_tx(dev, skb, sb_dev); return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq; } EXPORT_SYMBOL_GPL(qeth_iqd_select_queue); u16 qeth_osa_select_queue(struct net_device *dev, struct sk_buff *skb, struct net_device *sb_dev) { struct qeth_card *card = dev->ml_priv; if (qeth_uses_tx_prio_queueing(card)) return qeth_get_priority_queue(card, skb); return netdev_pick_tx(dev, skb, sb_dev); } EXPORT_SYMBOL_GPL(qeth_osa_select_queue); int qeth_open(struct net_device *dev) { struct qeth_card *card = dev->ml_priv; struct qeth_qdio_out_q *queue; unsigned int i; QETH_CARD_TEXT(card, 4, "qethopen"); card->data.state = CH_STATE_UP; netif_tx_start_all_queues(dev); qeth_for_each_output_queue(card, queue, i) { netif_napi_add_tx(dev, &queue->napi, qeth_tx_poll); napi_enable(&queue->napi); } napi_enable(&card->napi); local_bh_disable(); qeth_for_each_output_queue(card, queue, i) { napi_schedule(&queue->napi); } napi_schedule(&card->napi); /* kick-start the NAPI softirq: */ local_bh_enable(); return 0; } EXPORT_SYMBOL_GPL(qeth_open); int qeth_stop(struct net_device *dev) { struct qeth_card *card = dev->ml_priv; struct qeth_qdio_out_q *queue; unsigned int i; QETH_CARD_TEXT(card, 4, "qethstop"); napi_disable(&card->napi); cancel_delayed_work_sync(&card->buffer_reclaim_work); qdio_stop_irq(CARD_DDEV(card)); /* Quiesce the NAPI instances: */ qeth_for_each_output_queue(card, queue, i) napi_disable(&queue->napi); /* Stop .ndo_start_xmit, might still access queue->napi. */ netif_tx_disable(dev); qeth_for_each_output_queue(card, queue, i) { timer_delete_sync(&queue->timer); /* Queues may get re-allocated, so remove the NAPIs. */ netif_napi_del(&queue->napi); } return 0; } EXPORT_SYMBOL_GPL(qeth_stop); static int __init qeth_core_init(void) { int rc; pr_info("loading core functions\n"); qeth_debugfs_root = debugfs_create_dir("qeth", NULL); rc = qeth_register_dbf_views(); if (rc) goto dbf_err; qeth_core_root_dev = root_device_register("qeth"); rc = PTR_ERR_OR_ZERO(qeth_core_root_dev); if (rc) goto register_err; qeth_core_header_cache = kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE, roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE), 0, NULL); if (!qeth_core_header_cache) { rc = -ENOMEM; goto slab_err; } qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf", sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL); if (!qeth_qdio_outbuf_cache) { rc = -ENOMEM; goto cqslab_err; } qeth_qaob_cache = kmem_cache_create("qeth_qaob", sizeof(struct qaob), sizeof(struct qaob), 0, NULL); if (!qeth_qaob_cache) { rc = -ENOMEM; goto qaob_err; } rc = ccw_driver_register(&qeth_ccw_driver); if (rc) goto ccw_err; rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver); if (rc) goto ccwgroup_err; return 0; ccwgroup_err: ccw_driver_unregister(&qeth_ccw_driver); ccw_err: kmem_cache_destroy(qeth_qaob_cache); qaob_err: kmem_cache_destroy(qeth_qdio_outbuf_cache); cqslab_err: kmem_cache_destroy(qeth_core_header_cache); slab_err: root_device_unregister(qeth_core_root_dev); register_err: qeth_unregister_dbf_views(); dbf_err: debugfs_remove_recursive(qeth_debugfs_root); pr_err("Initializing the qeth device driver failed\n"); return rc; } static void __exit qeth_core_exit(void) { qeth_clear_dbf_list(); ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver); ccw_driver_unregister(&qeth_ccw_driver); kmem_cache_destroy(qeth_qaob_cache); kmem_cache_destroy(qeth_qdio_outbuf_cache); kmem_cache_destroy(qeth_core_header_cache); root_device_unregister(qeth_core_root_dev); qeth_unregister_dbf_views(); debugfs_remove_recursive(qeth_debugfs_root); pr_info("core functions removed\n"); } module_init(qeth_core_init); module_exit(qeth_core_exit); MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>"); MODULE_DESCRIPTION("qeth core functions"); MODULE_LICENSE("GPL");
[0.355QuellennavigatorsProjekt 2026-10-11] |
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2026-10-11