/* typhoon.c: A Linux Ethernet device driver for 3Com 3CR990 family of NICs */
/*
Written 2002 - 2004 by David Dillow < dave @ thedillows . org >
Based on code written 1998 - 2000 by Donald Becker < becker @ scyld . com > and
Linux 2 . 2 . x driver by David P . McLean < davidpmclean @ yahoo . com > .
This software may be used and distributed according to the terms of
the GNU General Public License ( GPL ) , incorporated herein by reference .
Drivers based on or derived from this code fall under the GPL and must
retain the authorship , copyright and license notice . This file is not
a complete program and may only be used when the entire operating
system is licensed under the GPL .
This software is available on a public web site . It may enable
cryptographic capabilities of the 3 Com hardware , and may be
exported from the United States under License Exception " TSU "
pursuant to 15 C . F . R . Section 740 . 13 ( e ) .
This work was funded by the National Library of Medicine under
the Department of Energy project number 0274 DD06D1 and NLM project
number Y1 - LM - 2015 - 01 .
This driver is designed for the 3 Com 3 CR990 Family of cards with the
3 XP Processor . It has been tested on x86 and sparc64 .
KNOWN ISSUES :
* ) Cannot DMA Rx packets to a 2 byte aligned address . Also firmware
issue . Hopefully 3 Com will fix it .
* ) Waiting for a command response takes 8 ms due to non - preemptable
polling . Only significant for getting stats and creating
SAs , but an ugly wart never the less .
TODO :
* ) Doesn ' t do IPSEC offloading . Yet . Keep yer pants on , it ' s coming .
* ) Add more support for ethtool ( especially for NIC stats )
* ) Allow disabling of RX checksum offloading
* ) Fix MAC changing to work while the interface is up
( Need to put commands on the TX ring , which changes
the locking )
* ) Add in FCS to { rx , tx } _ bytes , since the hardware doesn ' t . See
http : //oss.sgi.com/cgi-bin/mesg.cgi?a=netdev&i=20031215152211.7003fe8e.rddunlap%40osdl.org
*/
/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
* Setting to > 1518 effectively disables this feature .
*/
static int rx_copybreak = 200 ;
/* Should we use MMIO or Port IO?
* 0 : Port IO
* 1 : MMIO
* 2 : Try MMIO , fallback to Port IO
*/
static unsigned int use_mmio = 2 ;
/* end user-configurable values */
/* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
*/
static const int multicast_filter_limit = 32 ;
/* Operational parameters that are set at compile time. */
/* Keep the ring sizes a power of two for compile efficiency.
* The compiler will convert < unsigned > ' % ' < 2 ^ N > into a bit mask .
* Making the Tx ring too large decreases the effectiveness of channel
* bonding and packet priority .
* There are no ill effects from too - large receive rings .
*
* We don ' t currently use the Hi Tx ring so , don ' t make it very big .
*
* Beware that if we start using the Hi Tx ring , we will need to change
* typhoon_num_free_tx ( ) and typhoon_tx_complete ( ) to account for that .
*/
#define TXHI_ENTRIES 2
#define TXLO_ENTRIES 128
#define RX_ENTRIES 32
#define COMMAND_ENTRIES 16
#define RESPONSE_ENTRIES 32
#define COMMAND_RING_SIZE (COMMAND_ENTRIES * sizeof (struct cmd_desc))
#define RESPONSE_RING_SIZE (RESPONSE_ENTRIES * sizeof (struct resp_desc))
/* The 3XP will preload and remove 64 entries from the free buffer
* list , and we need one entry to keep the ring from wrapping , so
* to keep this a power of two , we use 128 entries .
*/
#define RXFREE_ENTRIES 128
#define RXENT_ENTRIES (RXFREE_ENTRIES - 1 )
/* Operational parameters that usually are not changed. */
/* Time in jiffies before concluding the transmitter is hung. */
#define TX_TIMEOUT (2 *HZ)
#define PKT_BUF_SZ 1536
#define FIRMWARE_NAME "3com/typhoon.bin"
#define pr_fmt(fmt) KBUILD_MODNAME " " fmt
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/ethtool.h>
#include <linux/if_vlan.h>
#include <linux/crc32.h>
#include <linux/bitops.h>
#include <asm /processor.h>
#include <asm /io.h>
#include <linux/uaccess.h>
#include <linux/in6.h>
#include <linux/dma-mapping.h>
#include <linux/firmware.h>
#include "typhoon.h"
MODULE_AUTHOR("David Dillow <dave@thedillows.org>" );
MODULE_LICENSE("GPL" );
MODULE_FIRMWARE(FIRMWARE_NAME);
MODULE_DESCRIPTION("3Com Typhoon Family (3C990, 3CR990, and variants)" );
MODULE_PARM_DESC(rx_copybreak, "Packets smaller than this are copied and "
"the buffer given back to the NIC. Default "
"is 200." );
MODULE_PARM_DESC(use_mmio, "Use MMIO (1) or PIO(0) to access the NIC. "
"Default is to try MMIO and fallback to PIO." );
module_param(rx_copybreak, int , 0 );
module_param(use_mmio, int , 0 );
#if TXLO_ENTRIES <= (2 * MAX_SKB_FRAGS)
#error TX ring too small!
#endif
struct typhoon_card_info {
const char *name;
const int capabilities;
};
#define TYPHOON_CRYPTO_NONE 0 x00
#define TYPHOON_CRYPTO_DES 0 x01
#define TYPHOON_CRYPTO_3DES 0 x02
#define TYPHOON_CRYPTO_VARIABLE 0 x04
#define TYPHOON_FIBER 0 x08
#define TYPHOON_WAKEUP_NEEDS_RESET 0 x10
enum typhoon_cards {
TYPHOON_TX = 0 , TYPHOON_TX95, TYPHOON_TX97, TYPHOON_SVR,
TYPHOON_SVR95, TYPHOON_SVR97, TYPHOON_TXM, TYPHOON_BSVR,
TYPHOON_FX95, TYPHOON_FX97, TYPHOON_FX95SVR, TYPHOON_FX97SVR,
TYPHOON_FXM,
};
/* directly indexed by enum typhoon_cards, above */
static struct typhoon_card_info typhoon_card_info[] = {
{ "3Com Typhoon (3C990-TX)" ,
TYPHOON_CRYPTO_NONE},
{ "3Com Typhoon (3CR990-TX-95)" ,
TYPHOON_CRYPTO_DES},
{ "3Com Typhoon (3CR990-TX-97)" ,
TYPHOON_CRYPTO_DES | TYPHOON_CRYPTO_3DES},
{ "3Com Typhoon (3C990SVR)" ,
TYPHOON_CRYPTO_NONE},
{ "3Com Typhoon (3CR990SVR95)" ,
TYPHOON_CRYPTO_DES},
{ "3Com Typhoon (3CR990SVR97)" ,
TYPHOON_CRYPTO_DES | TYPHOON_CRYPTO_3DES},
{ "3Com Typhoon2 (3C990B-TX-M)" ,
TYPHOON_CRYPTO_VARIABLE},
{ "3Com Typhoon2 (3C990BSVR)" ,
TYPHOON_CRYPTO_VARIABLE},
{ "3Com Typhoon (3CR990-FX-95)" ,
TYPHOON_CRYPTO_DES | TYPHOON_FIBER},
{ "3Com Typhoon (3CR990-FX-97)" ,
TYPHOON_CRYPTO_DES | TYPHOON_CRYPTO_3DES | TYPHOON_FIBER},
{ "3Com Typhoon (3CR990-FX-95 Server)" ,
TYPHOON_CRYPTO_DES | TYPHOON_FIBER},
{ "3Com Typhoon (3CR990-FX-97 Server)" ,
TYPHOON_CRYPTO_DES | TYPHOON_CRYPTO_3DES | TYPHOON_FIBER},
{ "3Com Typhoon2 (3C990B-FX-97)" ,
TYPHOON_CRYPTO_VARIABLE | TYPHOON_FIBER},
};
/* Notes on the new subsystem numbering scheme:
* bits 0 - 1 indicate crypto capabilities : ( 0 ) variable , ( 1 ) DES , or ( 2 ) 3 DES
* bit 4 indicates if this card has secured firmware ( we don ' t support it )
* bit 8 indicates if this is a ( 0 ) copper or ( 1 ) fiber card
* bits 12 - 16 indicate card type : ( 0 ) client and ( 1 ) server
*/
static const struct pci_device_id typhoon_pci_tbl[] = {
{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990,
PCI_ANY_ID, PCI_ANY_ID, 0 , 0 ,TYPHOON_TX },
{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_TX_95,
PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , TYPHOON_TX95 },
{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_TX_97,
PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , TYPHOON_TX97 },
{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990B,
PCI_ANY_ID, 0 x1000, 0 , 0 , TYPHOON_TXM },
{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990B,
PCI_ANY_ID, 0 x1102, 0 , 0 , TYPHOON_FXM },
{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990B,
PCI_ANY_ID, 0 x2000, 0 , 0 , TYPHOON_BSVR },
{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_FX,
PCI_ANY_ID, 0 x1101, 0 , 0 , TYPHOON_FX95 },
{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_FX,
PCI_ANY_ID, 0 x1102, 0 , 0 , TYPHOON_FX97 },
{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_FX,
PCI_ANY_ID, 0 x2101, 0 , 0 , TYPHOON_FX95SVR },
{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_FX,
PCI_ANY_ID, 0 x2102, 0 , 0 , TYPHOON_FX97SVR },
{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990SVR95,
PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , TYPHOON_SVR95 },
{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990SVR97,
PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , TYPHOON_SVR97 },
{ PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990SVR,
PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , TYPHOON_SVR },
{ 0 , }
};
MODULE_DEVICE_TABLE(pci, typhoon_pci_tbl);
/* Define the shared memory area
* Align everything the 3 XP will normally be using .
* We ' ll need to move / align txHi if we start using that ring .
*/
#define __3 xp_aligned ____cacheline_aligned
struct typhoon_shared {
struct typhoon_interface iface;
struct typhoon_indexes indexes __3 xp_aligned;
struct tx_desc txLo[TXLO_ENTRIES] __3 xp_aligned;
struct rx_desc rxLo[RX_ENTRIES] __3 xp_aligned;
struct rx_desc rxHi[RX_ENTRIES] __3 xp_aligned;
struct cmd_desc cmd[COMMAND_ENTRIES] __3 xp_aligned;
struct resp_desc resp[RESPONSE_ENTRIES] __3 xp_aligned;
struct rx_free rxBuff[RXFREE_ENTRIES] __3 xp_aligned;
u32 zeroWord;
struct tx_desc txHi[TXHI_ENTRIES];
} __packed;
struct rxbuff_ent {
struct sk_buff *skb;
dma_addr_t dma_addr;
};
struct typhoon {
/* Tx cache line section */
struct transmit_ring txLoRing ____cacheline_aligned;
struct pci_dev * tx_pdev;
void __iomem *tx_ioaddr;
u32 txlo_dma_addr;
/* Irq/Rx cache line section */
void __iomem *ioaddr ____cacheline_aligned;
struct typhoon_indexes *indexes;
u8 awaiting_resp;
u8 duplex;
u8 speed;
u8 card_state;
struct basic_ring rxLoRing;
struct pci_dev * pdev;
struct net_device * dev;
struct napi_struct napi;
struct basic_ring rxHiRing;
struct basic_ring rxBuffRing;
struct rxbuff_ent rxbuffers[RXENT_ENTRIES];
/* general section */
spinlock_t command_lock ____cacheline_aligned;
struct basic_ring cmdRing;
struct basic_ring respRing;
struct net_device_stats stats_saved;
struct typhoon_shared * shared;
dma_addr_t shared_dma;
__le16 xcvr_select;
__le16 wol_events;
__le32 offload;
/* unused stuff (future use) */
int capabilities;
struct transmit_ring txHiRing;
};
enum completion_wait_values {
NoWait = 0 , WaitNoSleep, WaitSleep,
};
/* These are the values for the typhoon.card_state variable.
* These determine where the statistics will come from in get_stats ( ) .
* The sleep image does not support the statistics we need .
*/
enum state_values {
Sleeping = 0 , Running,
};
/* PCI writes are not guaranteed to be posted in order, but outstanding writes
* cannot pass a read , so this forces current writes to post .
*/
#define typhoon_post_pci_writes(x) \
do { if (likely(use_mmio)) ioread32(x+TYPHOON_REG_HEARTBEAT); } while (0 )
/* We'll wait up to six seconds for a reset, and half a second normally.
*/
#define TYPHOON_UDELAY 50
#define TYPHOON_RESET_TIMEOUT_SLEEP (6 * HZ)
#define TYPHOON_RESET_TIMEOUT_NOSLEEP ((6 * 1000000 ) / TYPHOON_UDELAY)
#define TYPHOON_WAIT_TIMEOUT ((1000000 / 2 ) / TYPHOON_UDELAY)
#if defined (NETIF_F_TSO)
#define skb_tso_size(x) (skb_shinfo(x)->gso_size)
#define TSO_NUM_DESCRIPTORS 2
#define TSO_OFFLOAD_ON TYPHOON_OFFLOAD_TCP_SEGMENT
#else
#define NETIF_F_TSO 0
#define skb_tso_size(x) 0
#define TSO_NUM_DESCRIPTORS 0
#define TSO_OFFLOAD_ON 0
#endif
static inline void
typhoon_inc_index(u32 *index, const int count, const int num_entries)
{
/* Increment a ring index -- we can use this for all rings execept
* the Rx rings , as they use different size descriptors
* otherwise , everything is the same size as a cmd_desc
*/
*index += count * sizeof (struct cmd_desc);
*index %= num_entries * sizeof (struct cmd_desc);
}
static inline void
typhoon_inc_cmd_index(u32 *index, const int count)
{
typhoon_inc_index(index, count, COMMAND_ENTRIES);
}
static inline void
typhoon_inc_resp_index(u32 *index, const int count)
{
typhoon_inc_index(index, count, RESPONSE_ENTRIES);
}
static inline void
typhoon_inc_rxfree_index(u32 *index, const int count)
{
typhoon_inc_index(index, count, RXFREE_ENTRIES);
}
static inline void
typhoon_inc_tx_index(u32 *index, const int count)
{
/* if we start using the Hi Tx ring, this needs updating */
typhoon_inc_index(index, count, TXLO_ENTRIES);
}
static inline void
typhoon_inc_rx_index(u32 *index, const int count)
{
/* sizeof(struct rx_desc) != sizeof(struct cmd_desc) */
*index += count * sizeof (struct rx_desc);
*index %= RX_ENTRIES * sizeof (struct rx_desc);
}
static int
typhoon_reset(void __iomem *ioaddr, int wait_type)
{
int i, err = 0 ;
int timeout;
if (wait_type == WaitNoSleep)
timeout = TYPHOON_RESET_TIMEOUT_NOSLEEP;
else
timeout = TYPHOON_RESET_TIMEOUT_SLEEP;
iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK);
iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_STATUS);
iowrite32(TYPHOON_RESET_ALL, ioaddr + TYPHOON_REG_SOFT_RESET);
typhoon_post_pci_writes(ioaddr);
udelay(1 );
iowrite32(TYPHOON_RESET_NONE, ioaddr + TYPHOON_REG_SOFT_RESET);
if (wait_type != NoWait) {
for (i = 0 ; i < timeout; i++) {
if (ioread32(ioaddr + TYPHOON_REG_STATUS) ==
TYPHOON_STATUS_WAITING_FOR_HOST)
goto out;
if (wait_type == WaitSleep)
schedule_timeout_uninterruptible(1 );
else
udelay(TYPHOON_UDELAY);
}
err = -ETIMEDOUT;
}
out:
iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK);
iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_STATUS);
/* The 3XP seems to need a little extra time to complete the load
* of the sleep image before we can reliably boot it . Failure to
* do this occasionally results in a hung adapter after boot in
* typhoon_init_one ( ) while trying to read the MAC address or
* putting the card to sleep . 3 Com ' s driver waits 5 ms , but
* that seems to be overkill . However , if we can sleep , we might
* as well give it that much time . Otherwise , we ' ll give it 500 us ,
* which should be enough ( I ' ve see it work well at 100 us , but still
* saw occasional problems . )
*/
if (wait_type == WaitSleep)
msleep(5 );
else
udelay(500 );
return err;
}
static int
typhoon_wait_status(void __iomem *ioaddr, u32 wait_value)
{
int i, err = 0 ;
for (i = 0 ; i < TYPHOON_WAIT_TIMEOUT; i++) {
if (ioread32(ioaddr + TYPHOON_REG_STATUS) == wait_value)
goto out;
udelay(TYPHOON_UDELAY);
}
err = -ETIMEDOUT;
out:
return err;
}
static inline void
typhoon_media_status(struct net_device *dev, struct resp_desc *resp)
{
if (resp->parm1 & TYPHOON_MEDIA_STAT_NO_LINK)
netif_carrier_off(dev);
else
netif_carrier_on(dev);
}
static inline void
typhoon_hello(struct typhoon *tp)
{
struct basic_ring *ring = &tp->cmdRing;
struct cmd_desc *cmd;
/* We only get a hello request if we've not sent anything to the
* card in a long while . If the lock is held , then we ' re in the
* process of issuing a command , so we don ' t need to respond .
*/
if (spin_trylock(&tp->command_lock)) {
cmd = (struct cmd_desc *)(ring->ringBase + ring->lastWrite);
typhoon_inc_cmd_index(&ring->lastWrite, 1 );
INIT_COMMAND_NO_RESPONSE(cmd, TYPHOON_CMD_HELLO_RESP);
wmb();
iowrite32(ring->lastWrite, tp->ioaddr + TYPHOON_REG_CMD_READY);
spin_unlock(&tp->command_lock);
}
}
static int
typhoon_process_response(struct typhoon *tp, int resp_size,
struct resp_desc *resp_save)
{
struct typhoon_indexes *indexes = tp->indexes;
struct resp_desc *resp;
u8 *base = tp->respRing.ringBase;
int count, len, wrap_len;
u32 cleared;
u32 ready;
cleared = le32_to_cpu(indexes->respCleared);
ready = le32_to_cpu(indexes->respReady);
while (cleared != ready) {
resp = (struct resp_desc *)(base + cleared);
count = resp->numDesc + 1 ;
if (resp_save && resp->seqNo) {
if (count > resp_size) {
resp_save->flags = TYPHOON_RESP_ERROR;
goto cleanup;
}
wrap_len = 0 ;
len = count * sizeof (*resp);
if (unlikely(cleared + len > RESPONSE_RING_SIZE)) {
wrap_len = cleared + len - RESPONSE_RING_SIZE;
len = RESPONSE_RING_SIZE - cleared;
}
memcpy(resp_save, resp, len);
if (unlikely(wrap_len)) {
resp_save += len / sizeof (*resp);
memcpy(resp_save, base, wrap_len);
}
resp_save = NULL;
} else if (resp->cmd == TYPHOON_CMD_READ_MEDIA_STATUS) {
typhoon_media_status(tp->dev, resp);
} else if (resp->cmd == TYPHOON_CMD_HELLO_RESP) {
typhoon_hello(tp);
} else {
netdev_err(tp->dev,
"dumping unexpected response 0x%04x:%d:0x%02x:0x%04x:%08x:%08x\n" ,
le16_to_cpu(resp->cmd),
resp->numDesc, resp->flags,
le16_to_cpu(resp->parm1),
le32_to_cpu(resp->parm2),
le32_to_cpu(resp->parm3));
}
cleanup:
typhoon_inc_resp_index(&cleared, count);
}
indexes->respCleared = cpu_to_le32(cleared);
wmb();
return resp_save == NULL;
}
static inline int
typhoon_num_free(int lastWrite, int lastRead, int ringSize)
{
/* this works for all descriptors but rx_desc, as they are a
* different size than the cmd_desc - - everyone else is the same
*/
lastWrite /= sizeof (struct cmd_desc);
lastRead /= sizeof (struct cmd_desc);
return (ringSize + lastRead - lastWrite - 1 ) % ringSize;
}
static inline int
typhoon_num_free_cmd(struct typhoon *tp)
{
int lastWrite = tp->cmdRing.lastWrite;
int cmdCleared = le32_to_cpu(tp->indexes->cmdCleared);
return typhoon_num_free(lastWrite, cmdCleared, COMMAND_ENTRIES);
}
static inline int
typhoon_num_free_resp(struct typhoon *tp)
{
int respReady = le32_to_cpu(tp->indexes->respReady);
int respCleared = le32_to_cpu(tp->indexes->respCleared);
return typhoon_num_free(respReady, respCleared, RESPONSE_ENTRIES);
}
static inline int
typhoon_num_free_tx(struct transmit_ring *ring)
{
/* if we start using the Hi Tx ring, this needs updating */
return typhoon_num_free(ring->lastWrite, ring->lastRead, TXLO_ENTRIES);
}
static int
typhoon_issue_command(struct typhoon *tp, int num_cmd, struct cmd_desc *cmd,
int num_resp, struct resp_desc *resp)
{
struct typhoon_indexes *indexes = tp->indexes;
struct basic_ring *ring = &tp->cmdRing;
struct resp_desc local_resp;
int i, err = 0 ;
int got_resp;
int freeCmd, freeResp;
int len, wrap_len;
spin_lock(&tp->command_lock);
freeCmd = typhoon_num_free_cmd(tp);
freeResp = typhoon_num_free_resp(tp);
if (freeCmd < num_cmd || freeResp < num_resp) {
netdev_err(tp->dev, "no descs for cmd, had (needed) %d (%d) cmd, %d (%d) resp\n" ,
freeCmd, num_cmd, freeResp, num_resp);
err = -ENOMEM;
goto out;
}
if (cmd->flags & TYPHOON_CMD_RESPOND) {
/* If we're expecting a response, but the caller hasn't given
* us a place to put it , we ' ll provide one .
*/
tp->awaiting_resp = 1 ;
if (resp == NULL) {
resp = &local_resp;
num_resp = 1 ;
}
}
wrap_len = 0 ;
len = num_cmd * sizeof (*cmd);
if (unlikely(ring->lastWrite + len > COMMAND_RING_SIZE)) {
wrap_len = ring->lastWrite + len - COMMAND_RING_SIZE;
len = COMMAND_RING_SIZE - ring->lastWrite;
}
memcpy(ring->ringBase + ring->lastWrite, cmd, len);
if (unlikely(wrap_len)) {
struct cmd_desc *wrap_ptr = cmd;
wrap_ptr += len / sizeof (*cmd);
memcpy(ring->ringBase, wrap_ptr, wrap_len);
}
typhoon_inc_cmd_index(&ring->lastWrite, num_cmd);
/* "I feel a presence... another warrior is on the mesa."
*/
wmb();
iowrite32(ring->lastWrite, tp->ioaddr + TYPHOON_REG_CMD_READY);
typhoon_post_pci_writes(tp->ioaddr);
if ((cmd->flags & TYPHOON_CMD_RESPOND) == 0 )
goto out;
/* Ugh. We'll be here about 8ms, spinning our thumbs, unable to
* preempt or do anything other than take interrupts . So , don ' t
* wait for a response unless you have to .
*
* I ' ve thought about trying to sleep here , but we ' re called
* from many contexts that don ' t allow that . Also , given the way
* 3 Com has implemented irq coalescing , we would likely timeout - -
* this has been observed in real life !
*
* The big killer is we have to wait to get stats from the card ,
* though we could go to a periodic refresh of those if we don ' t
* mind them getting somewhat stale . The rest of the waiting
* commands occur during open / close / suspend / resume , so they aren ' t
* time critical . Creating SAs in the future will also have to
* wait here .
*/
got_resp = 0 ;
for (i = 0 ; i < TYPHOON_WAIT_TIMEOUT && !got_resp; i++) {
if (indexes->respCleared != indexes->respReady)
got_resp = typhoon_process_response(tp, num_resp,
resp);
udelay(TYPHOON_UDELAY);
}
if (!got_resp) {
err = -ETIMEDOUT;
goto out;
}
/* Collect the error response even if we don't care about the
* rest of the response
*/
if (resp->flags & TYPHOON_RESP_ERROR)
err = -EIO;
out:
if (tp->awaiting_resp) {
tp->awaiting_resp = 0 ;
smp_wmb();
/* Ugh. If a response was added to the ring between
* the call to typhoon_process_response ( ) and the clearing
* of tp - > awaiting_resp , we could have missed the interrupt
* and it could hang in the ring an indeterminate amount of
* time . So , check for it , and interrupt ourselves if this
* is the case .
*/
if (indexes->respCleared != indexes->respReady)
iowrite32(1 , tp->ioaddr + TYPHOON_REG_SELF_INTERRUPT);
}
spin_unlock(&tp->command_lock);
return err;
}
static inline void
typhoon_tso_fill(struct sk_buff *skb, struct transmit_ring *txRing,
u32 ring_dma)
{
struct tcpopt_desc *tcpd;
u32 tcpd_offset = ring_dma;
tcpd = (struct tcpopt_desc *) (txRing->ringBase + txRing->lastWrite);
tcpd_offset += txRing->lastWrite;
tcpd_offset += offsetof(struct tcpopt_desc, bytesTx);
typhoon_inc_tx_index(&txRing->lastWrite, 1 );
tcpd->flags = TYPHOON_OPT_DESC | TYPHOON_OPT_TCP_SEG;
tcpd->numDesc = 1 ;
tcpd->mss_flags = cpu_to_le16(skb_tso_size(skb));
tcpd->mss_flags |= TYPHOON_TSO_FIRST | TYPHOON_TSO_LAST;
tcpd->respAddrLo = cpu_to_le32(tcpd_offset);
tcpd->bytesTx = cpu_to_le32(skb->len);
tcpd->status = 0 ;
}
static netdev_tx_t
typhoon_start_tx(struct sk_buff *skb, struct net_device *dev)
{
struct typhoon *tp = netdev_priv(dev);
struct transmit_ring *txRing;
struct tx_desc *txd, *first_txd;
dma_addr_t skb_dma;
int numDesc;
/* we have two rings to choose from, but we only use txLo for now
* If we start using the Hi ring as well , we ' ll need to update
* typhoon_stop_runtime ( ) , typhoon_interrupt ( ) , typhoon_num_free_tx ( ) ,
* and TXHI_ENTRIES to match , as well as update the TSO code below
* to get the right DMA address
*/
txRing = &tp->txLoRing;
/* We need one descriptor for each fragment of the sk_buff, plus the
* one for the - > data area of it .
*
* The docs say a maximum of 16 fragment descriptors per TCP option
* descriptor , then make a new packet descriptor and option descriptor
* for the next 16 fragments . The engineers say just an option
* descriptor is needed . I ' ve tested up to 26 fragments with a single
* packet descriptor / option descriptor combo , so I use that for now .
*
* If problems develop with TSO , check this first .
*/
numDesc = skb_shinfo(skb)->nr_frags + 1 ;
if (skb_is_gso(skb))
numDesc++;
/* When checking for free space in the ring, we need to also
* account for the initial Tx descriptor , and we always must leave
* at least one descriptor unused in the ring so that it doesn ' t
* wrap and look empty .
*
* The only time we should loop here is when we hit the race
* between marking the queue awake and updating the cleared index .
* Just loop and it will appear . This comes from the acenic driver .
*/
while (unlikely(typhoon_num_free_tx(txRing) < (numDesc + 2 )))
smp_rmb();
first_txd = (struct tx_desc *) (txRing->ringBase + txRing->lastWrite);
typhoon_inc_tx_index(&txRing->lastWrite, 1 );
first_txd->flags = TYPHOON_TX_DESC | TYPHOON_DESC_VALID;
first_txd->numDesc = 0 ;
first_txd->len = 0 ;
first_txd->tx_addr = (u64)((unsigned long ) skb);
first_txd->processFlags = 0 ;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
/* The 3XP will figure out if this is UDP/TCP */
first_txd->processFlags |= TYPHOON_TX_PF_TCP_CHKSUM;
first_txd->processFlags |= TYPHOON_TX_PF_UDP_CHKSUM;
first_txd->processFlags |= TYPHOON_TX_PF_IP_CHKSUM;
}
if (skb_vlan_tag_present(skb)) {
first_txd->processFlags |=
TYPHOON_TX_PF_INSERT_VLAN | TYPHOON_TX_PF_VLAN_PRIORITY;
first_txd->processFlags |=
cpu_to_le32(htons(skb_vlan_tag_get(skb)) <<
TYPHOON_TX_PF_VLAN_TAG_SHIFT);
}
if (skb_is_gso(skb)) {
first_txd->processFlags |= TYPHOON_TX_PF_TCP_SEGMENT;
first_txd->numDesc++;
typhoon_tso_fill(skb, txRing, tp->txlo_dma_addr);
}
txd = (struct tx_desc *) (txRing->ringBase + txRing->lastWrite);
typhoon_inc_tx_index(&txRing->lastWrite, 1 );
/* No need to worry about padding packet -- the firmware pads
* it with zeros to ETH_ZLEN for us .
*/
if (skb_shinfo(skb)->nr_frags == 0 ) {
skb_dma = dma_map_single(&tp->tx_pdev->dev, skb->data,
skb->len, DMA_TO_DEVICE);
txd->flags = TYPHOON_FRAG_DESC | TYPHOON_DESC_VALID;
txd->len = cpu_to_le16(skb->len);
txd->frag.addr = cpu_to_le32(skb_dma);
txd->frag.addrHi = 0 ;
first_txd->numDesc++;
} else {
int i, len;
len = skb_headlen(skb);
skb_dma = dma_map_single(&tp->tx_pdev->dev, skb->data, len,
DMA_TO_DEVICE);
txd->flags = TYPHOON_FRAG_DESC | TYPHOON_DESC_VALID;
txd->len = cpu_to_le16(len);
txd->frag.addr = cpu_to_le32(skb_dma);
txd->frag.addrHi = 0 ;
first_txd->numDesc++;
for (i = 0 ; i < skb_shinfo(skb)->nr_frags; i++) {
const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
void *frag_addr;
txd = (struct tx_desc *) (txRing->ringBase +
txRing->lastWrite);
typhoon_inc_tx_index(&txRing->lastWrite, 1 );
len = skb_frag_size(frag);
frag_addr = skb_frag_address(frag);
skb_dma = dma_map_single(&tp->tx_pdev->dev, frag_addr,
len, DMA_TO_DEVICE);
txd->flags = TYPHOON_FRAG_DESC | TYPHOON_DESC_VALID;
txd->len = cpu_to_le16(len);
txd->frag.addr = cpu_to_le32(skb_dma);
txd->frag.addrHi = 0 ;
first_txd->numDesc++;
}
}
/* Kick the 3XP
*/
wmb();
iowrite32(txRing->lastWrite, tp->tx_ioaddr + txRing->writeRegister);
/* If we don't have room to put the worst case packet on the
* queue , then we must stop the queue . We need 2 extra
* descriptors - - one to prevent ring wrap , and one for the
* Tx header .
*/
numDesc = MAX_SKB_FRAGS + TSO_NUM_DESCRIPTORS + 1 ;
if (typhoon_num_free_tx(txRing) < (numDesc + 2 )) {
netif_stop_queue(dev);
/* A Tx complete IRQ could have gotten between, making
* the ring free again . Only need to recheck here , since
* Tx is serialized .
*/
if (typhoon_num_free_tx(txRing) >= (numDesc + 2 ))
netif_wake_queue(dev);
}
return NETDEV_TX_OK;
}
static void
typhoon_set_rx_mode(struct net_device *dev)
{
struct typhoon *tp = netdev_priv(dev);
struct cmd_desc xp_cmd;
u32 mc_filter[2 ];
__le16 filter;
filter = TYPHOON_RX_FILTER_DIRECTED | TYPHOON_RX_FILTER_BROADCAST;
if (dev->flags & IFF_PROMISC) {
filter |= TYPHOON_RX_FILTER_PROMISCOUS;
} else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
(dev->flags & IFF_ALLMULTI)) {
/* Too many to match, or accept all multicasts. */
filter |= TYPHOON_RX_FILTER_ALL_MCAST;
} else if (!netdev_mc_empty(dev)) {
struct netdev_hw_addr *ha;
memset(mc_filter, 0 , sizeof (mc_filter));
netdev_for_each_mc_addr(ha, dev) {
int bit = ether_crc(ETH_ALEN, ha->addr) & 0 x3f;
mc_filter[bit >> 5 ] |= 1 << (bit & 0 x1f);
}
INIT_COMMAND_NO_RESPONSE(&xp_cmd,
TYPHOON_CMD_SET_MULTICAST_HASH);
xp_cmd.parm1 = TYPHOON_MCAST_HASH_SET;
xp_cmd.parm2 = cpu_to_le32(mc_filter[0 ]);
xp_cmd.parm3 = cpu_to_le32(mc_filter[1 ]);
typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
filter |= TYPHOON_RX_FILTER_MCAST_HASH;
}
INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_RX_FILTER);
xp_cmd.parm1 = filter;
typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
}
static int
typhoon_do_get_stats(struct typhoon *tp)
{
struct net_device_stats *stats = &tp->dev->stats;
struct net_device_stats *saved = &tp->stats_saved;
struct cmd_desc xp_cmd;
struct resp_desc xp_resp[7 ];
struct stats_resp *s = (struct stats_resp *) xp_resp;
int err;
INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_STATS);
err = typhoon_issue_command(tp, 1 , &xp_cmd, 7 , xp_resp);
if (err < 0 )
return err;
/* 3Com's Linux driver uses txMultipleCollisions as it's
* collisions value , but there is some other collision info as well . . .
*
* The extra status reported would be a good candidate for
* ethtool_ops - > get_ { strings , stats } ( )
*/
stats->tx_packets = le32_to_cpu(s->txPackets) +
saved->tx_packets;
stats->tx_bytes = le64_to_cpu(s->txBytes) +
saved->tx_bytes;
stats->tx_errors = le32_to_cpu(s->txCarrierLost) +
saved->tx_errors;
stats->tx_carrier_errors = le32_to_cpu(s->txCarrierLost) +
saved->tx_carrier_errors;
stats->collisions = le32_to_cpu(s->txMultipleCollisions) +
saved->collisions;
stats->rx_packets = le32_to_cpu(s->rxPacketsGood) +
saved->rx_packets;
stats->rx_bytes = le64_to_cpu(s->rxBytesGood) +
saved->rx_bytes;
stats->rx_fifo_errors = le32_to_cpu(s->rxFifoOverruns) +
saved->rx_fifo_errors;
stats->rx_errors = le32_to_cpu(s->rxFifoOverruns) +
le32_to_cpu(s->BadSSD) + le32_to_cpu(s->rxCrcErrors) +
saved->rx_errors;
stats->rx_crc_errors = le32_to_cpu(s->rxCrcErrors) +
saved->rx_crc_errors;
stats->rx_length_errors = le32_to_cpu(s->rxOversized) +
saved->rx_length_errors;
tp->speed = (s->linkStatus & TYPHOON_LINK_100MBPS) ?
SPEED_100 : SPEED_10;
tp->duplex = (s->linkStatus & TYPHOON_LINK_FULL_DUPLEX) ?
DUPLEX_FULL : DUPLEX_HALF;
return 0 ;
}
static struct net_device_stats *
typhoon_get_stats(struct net_device *dev)
{
struct typhoon *tp = netdev_priv(dev);
struct net_device_stats *stats = &tp->dev->stats;
struct net_device_stats *saved = &tp->stats_saved;
smp_rmb();
if (tp->card_state == Sleeping)
return saved;
if (typhoon_do_get_stats(tp) < 0 ) {
netdev_err(dev, "error getting stats\n" );
return saved;
}
return stats;
}
static void
typhoon_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
struct typhoon *tp = netdev_priv(dev);
struct pci_dev *pci_dev = tp->pdev;
struct cmd_desc xp_cmd;
struct resp_desc xp_resp[3 ];
smp_rmb();
if (tp->card_state == Sleeping) {
strscpy(info->fw_version, "Sleep image" ,
sizeof (info->fw_version));
} else {
INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_VERSIONS);
if (typhoon_issue_command(tp, 1 , &xp_cmd, 3 , xp_resp) < 0 ) {
strscpy(info->fw_version, "Unknown runtime" ,
sizeof (info->fw_version));
} else {
u32 sleep_ver = le32_to_cpu(xp_resp[0 ].parm2);
snprintf(info->fw_version, sizeof (info->fw_version),
"%02x.%03x.%03x" , sleep_ver >> 24 ,
(sleep_ver >> 12 ) & 0 xfff, sleep_ver & 0 xfff);
}
}
strscpy(info->driver, KBUILD_MODNAME, sizeof (info->driver));
strscpy(info->bus_info, pci_name(pci_dev), sizeof (info->bus_info));
}
static int
typhoon_get_link_ksettings(struct net_device *dev,
struct ethtool_link_ksettings *cmd)
{
struct typhoon *tp = netdev_priv(dev);
u32 supported, advertising = 0 ;
supported = SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
SUPPORTED_Autoneg;
switch (tp->xcvr_select) {
case TYPHOON_XCVR_10HALF:
advertising = ADVERTISED_10baseT_Half;
break ;
case TYPHOON_XCVR_10FULL:
advertising = ADVERTISED_10baseT_Full;
break ;
case TYPHOON_XCVR_100HALF:
advertising = ADVERTISED_100baseT_Half;
break ;
case TYPHOON_XCVR_100FULL:
advertising = ADVERTISED_100baseT_Full;
break ;
case TYPHOON_XCVR_AUTONEG:
advertising = ADVERTISED_10baseT_Half |
ADVERTISED_10baseT_Full |
ADVERTISED_100baseT_Half |
ADVERTISED_100baseT_Full |
ADVERTISED_Autoneg;
break ;
}
if (tp->capabilities & TYPHOON_FIBER) {
supported |= SUPPORTED_FIBRE;
advertising |= ADVERTISED_FIBRE;
cmd->base.port = PORT_FIBRE;
} else {
supported |= SUPPORTED_10baseT_Half |
SUPPORTED_10baseT_Full |
SUPPORTED_TP;
advertising |= ADVERTISED_TP;
cmd->base.port = PORT_TP;
}
/* need to get stats to make these link speed/duplex valid */
typhoon_do_get_stats(tp);
cmd->base.speed = tp->speed;
cmd->base.duplex = tp->duplex;
cmd->base.phy_address = 0 ;
if (tp->xcvr_select == TYPHOON_XCVR_AUTONEG)
cmd->base.autoneg = AUTONEG_ENABLE;
else
cmd->base.autoneg = AUTONEG_DISABLE;
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
supported);
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
advertising);
return 0 ;
}
static int
typhoon_set_link_ksettings(struct net_device *dev,
const struct ethtool_link_ksettings *cmd)
{
struct typhoon *tp = netdev_priv(dev);
u32 speed = cmd->base.speed;
struct cmd_desc xp_cmd;
__le16 xcvr;
int err;
err = -EINVAL;
if (cmd->base.autoneg == AUTONEG_ENABLE) {
xcvr = TYPHOON_XCVR_AUTONEG;
} else {
if (cmd->base.duplex == DUPLEX_HALF) {
if (speed == SPEED_10)
xcvr = TYPHOON_XCVR_10HALF;
else if (speed == SPEED_100)
xcvr = TYPHOON_XCVR_100HALF;
else
goto out;
} else if (cmd->base.duplex == DUPLEX_FULL) {
if (speed == SPEED_10)
xcvr = TYPHOON_XCVR_10FULL;
else if (speed == SPEED_100)
xcvr = TYPHOON_XCVR_100FULL;
else
goto out;
} else
goto out;
}
INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_XCVR_SELECT);
xp_cmd.parm1 = xcvr;
err = typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
if (err < 0 )
goto out;
tp->xcvr_select = xcvr;
if (cmd->base.autoneg == AUTONEG_ENABLE) {
tp->speed = 0 xff; /* invalid */
tp->duplex = 0 xff; /* invalid */
} else {
tp->speed = speed;
tp->duplex = cmd->base.duplex;
}
out:
return err;
}
static void
typhoon_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
struct typhoon *tp = netdev_priv(dev);
wol->supported = WAKE_PHY | WAKE_MAGIC;
wol->wolopts = 0 ;
if (tp->wol_events & TYPHOON_WAKE_LINK_EVENT)
wol->wolopts |= WAKE_PHY;
if (tp->wol_events & TYPHOON_WAKE_MAGIC_PKT)
wol->wolopts |= WAKE_MAGIC;
memset(&wol->sopass, 0 , sizeof (wol->sopass));
}
static int
typhoon_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
struct typhoon *tp = netdev_priv(dev);
if (wol->wolopts & ~(WAKE_PHY | WAKE_MAGIC))
return -EINVAL;
tp->wol_events = 0 ;
if (wol->wolopts & WAKE_PHY)
tp->wol_events |= TYPHOON_WAKE_LINK_EVENT;
if (wol->wolopts & WAKE_MAGIC)
tp->wol_events |= TYPHOON_WAKE_MAGIC_PKT;
return 0 ;
}
static void
typhoon_get_ringparam(struct net_device *dev, struct ethtool_ringparam *ering,
struct kernel_ethtool_ringparam *kernel_ering,
struct netlink_ext_ack *extack)
{
ering->rx_max_pending = RXENT_ENTRIES;
ering->tx_max_pending = TXLO_ENTRIES - 1 ;
ering->rx_pending = RXENT_ENTRIES;
ering->tx_pending = TXLO_ENTRIES - 1 ;
}
static const struct ethtool_ops typhoon_ethtool_ops = {
.get_drvinfo = typhoon_get_drvinfo,
.get_wol = typhoon_get_wol,
.set_wol = typhoon_set_wol,
.get_link = ethtool_op_get_link,
.get_ringparam = typhoon_get_ringparam,
.get_link_ksettings = typhoon_get_link_ksettings,
.set_link_ksettings = typhoon_set_link_ksettings,
};
static int
typhoon_wait_interrupt(void __iomem *ioaddr)
{
int i, err = 0 ;
for (i = 0 ; i < TYPHOON_WAIT_TIMEOUT; i++) {
if (ioread32(ioaddr + TYPHOON_REG_INTR_STATUS) &
TYPHOON_INTR_BOOTCMD)
goto out;
udelay(TYPHOON_UDELAY);
}
err = -ETIMEDOUT;
out:
iowrite32(TYPHOON_INTR_BOOTCMD, ioaddr + TYPHOON_REG_INTR_STATUS);
return err;
}
#define shared_offset(x) offsetof(struct typhoon_shared, x)
static void
typhoon_init_interface(struct typhoon *tp)
{
struct typhoon_interface *iface = &tp->shared->iface;
dma_addr_t shared_dma;
memset(tp->shared, 0 , sizeof (struct typhoon_shared));
/* The *Hi members of iface are all init'd to zero by the memset().
*/
shared_dma = tp->shared_dma + shared_offset(indexes);
iface->ringIndex = cpu_to_le32(shared_dma);
shared_dma = tp->shared_dma + shared_offset(txLo);
iface->txLoAddr = cpu_to_le32(shared_dma);
iface->txLoSize = cpu_to_le32(TXLO_ENTRIES * sizeof (struct tx_desc));
shared_dma = tp->shared_dma + shared_offset(txHi);
iface->txHiAddr = cpu_to_le32(shared_dma);
iface->txHiSize = cpu_to_le32(TXHI_ENTRIES * sizeof (struct tx_desc));
shared_dma = tp->shared_dma + shared_offset(rxBuff);
iface->rxBuffAddr = cpu_to_le32(shared_dma);
iface->rxBuffSize = cpu_to_le32(RXFREE_ENTRIES *
sizeof (struct rx_free));
shared_dma = tp->shared_dma + shared_offset(rxLo);
iface->rxLoAddr = cpu_to_le32(shared_dma);
iface->rxLoSize = cpu_to_le32(RX_ENTRIES * sizeof (struct rx_desc));
shared_dma = tp->shared_dma + shared_offset(rxHi);
iface->rxHiAddr = cpu_to_le32(shared_dma);
iface->rxHiSize = cpu_to_le32(RX_ENTRIES * sizeof (struct rx_desc));
shared_dma = tp->shared_dma + shared_offset(cmd);
iface->cmdAddr = cpu_to_le32(shared_dma);
iface->cmdSize = cpu_to_le32(COMMAND_RING_SIZE);
shared_dma = tp->shared_dma + shared_offset(resp);
iface->respAddr = cpu_to_le32(shared_dma);
iface->respSize = cpu_to_le32(RESPONSE_RING_SIZE);
shared_dma = tp->shared_dma + shared_offset(zeroWord);
iface->zeroAddr = cpu_to_le32(shared_dma);
tp->indexes = &tp->shared->indexes;
tp->txLoRing.ringBase = (u8 *) tp->shared->txLo;
tp->txHiRing.ringBase = (u8 *) tp->shared->txHi;
tp->rxLoRing.ringBase = (u8 *) tp->shared->rxLo;
tp->rxHiRing.ringBase = (u8 *) tp->shared->rxHi;
tp->rxBuffRing.ringBase = (u8 *) tp->shared->rxBuff;
tp->cmdRing.ringBase = (u8 *) tp->shared->cmd;
tp->respRing.ringBase = (u8 *) tp->shared->resp;
tp->txLoRing.writeRegister = TYPHOON_REG_TX_LO_READY;
tp->txHiRing.writeRegister = TYPHOON_REG_TX_HI_READY;
tp->txlo_dma_addr = le32_to_cpu(iface->txLoAddr);
tp->card_state = Sleeping;
tp->offload = TYPHOON_OFFLOAD_IP_CHKSUM | TYPHOON_OFFLOAD_TCP_CHKSUM;
tp->offload |= TYPHOON_OFFLOAD_UDP_CHKSUM | TSO_OFFLOAD_ON;
tp->offload |= TYPHOON_OFFLOAD_VLAN;
spin_lock_init(&tp->command_lock);
/* Force the writes to the shared memory area out before continuing. */
wmb();
}
static void
typhoon_init_rings(struct typhoon *tp)
{
memset(tp->indexes, 0 , sizeof (struct typhoon_indexes));
tp->txLoRing.lastWrite = 0 ;
tp->txHiRing.lastWrite = 0 ;
tp->rxLoRing.lastWrite = 0 ;
tp->rxHiRing.lastWrite = 0 ;
tp->rxBuffRing.lastWrite = 0 ;
tp->cmdRing.lastWrite = 0 ;
tp->respRing.lastWrite = 0 ;
tp->txLoRing.lastRead = 0 ;
tp->txHiRing.lastRead = 0 ;
}
static const struct firmware *typhoon_fw;
static int
typhoon_request_firmware(struct typhoon *tp)
{
const struct typhoon_file_header *fHdr;
const struct typhoon_section_header *sHdr;
const u8 *image_data;
u32 numSections;
u32 section_len;
u32 remaining;
int err;
if (typhoon_fw)
return 0 ;
err = request_firmware(&typhoon_fw, FIRMWARE_NAME, &tp->pdev->dev);
if (err) {
netdev_err(tp->dev, "Failed to load firmware \" %s\"\n" ,
FIRMWARE_NAME);
return err;
}
image_data = typhoon_fw->data;
remaining = typhoon_fw->size;
if (remaining < sizeof (struct typhoon_file_header))
goto invalid_fw;
fHdr = (struct typhoon_file_header *) image_data;
if (memcmp(fHdr->tag, "TYPHOON" , 8 ))
goto invalid_fw;
numSections = le32_to_cpu(fHdr->numSections);
image_data += sizeof (struct typhoon_file_header);
remaining -= sizeof (struct typhoon_file_header);
while (numSections--) {
if (remaining < sizeof (struct typhoon_section_header))
goto invalid_fw;
sHdr = (struct typhoon_section_header *) image_data;
image_data += sizeof (struct typhoon_section_header);
section_len = le32_to_cpu(sHdr->len);
if (remaining < section_len)
goto invalid_fw;
image_data += section_len;
remaining -= section_len;
}
return 0 ;
invalid_fw:
netdev_err(tp->dev, "Invalid firmware image\n" );
release_firmware(typhoon_fw);
typhoon_fw = NULL;
return -EINVAL;
}
static int
typhoon_download_firmware(struct typhoon *tp)
{
void __iomem *ioaddr = tp->ioaddr;
struct pci_dev *pdev = tp->pdev;
const struct typhoon_file_header *fHdr;
const struct typhoon_section_header *sHdr;
const u8 *image_data;
void *dpage;
dma_addr_t dpage_dma;
__sum16 csum;
u32 irqEnabled;
u32 irqMasked;
u32 numSections;
u32 section_len;
u32 len;
u32 load_addr;
u32 hmac;
int i;
int err;
image_data = typhoon_fw->data;
fHdr = (struct typhoon_file_header *) image_data;
/* Cannot just map the firmware image using dma_map_single() as
* the firmware is vmalloc ( ) ' d and may not be physically contiguous ,
* so we allocate some coherent memory to copy the sections into .
*/
err = -ENOMEM;
dpage = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, &dpage_dma, GFP_ATOMIC);
if (!dpage) {
netdev_err(tp->dev, "no DMA mem for firmware\n" );
goto err_out;
}
irqEnabled = ioread32(ioaddr + TYPHOON_REG_INTR_ENABLE);
iowrite32(irqEnabled | TYPHOON_INTR_BOOTCMD,
ioaddr + TYPHOON_REG_INTR_ENABLE);
irqMasked = ioread32(ioaddr + TYPHOON_REG_INTR_MASK);
iowrite32(irqMasked | TYPHOON_INTR_BOOTCMD,
ioaddr + TYPHOON_REG_INTR_MASK);
err = -ETIMEDOUT;
if (typhoon_wait_status(ioaddr, TYPHOON_STATUS_WAITING_FOR_HOST) < 0 ) {
netdev_err(tp->dev, "card ready timeout\n" );
goto err_out_irq;
}
numSections = le32_to_cpu(fHdr->numSections);
load_addr = le32_to_cpu(fHdr->startAddr);
iowrite32(TYPHOON_INTR_BOOTCMD, ioaddr + TYPHOON_REG_INTR_STATUS);
iowrite32(load_addr, ioaddr + TYPHOON_REG_DOWNLOAD_BOOT_ADDR);
hmac = le32_to_cpu(fHdr->hmacDigest[0 ]);
iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_0);
hmac = le32_to_cpu(fHdr->hmacDigest[1 ]);
iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_1);
hmac = le32_to_cpu(fHdr->hmacDigest[2 ]);
iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_2);
hmac = le32_to_cpu(fHdr->hmacDigest[3 ]);
iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_3);
hmac = le32_to_cpu(fHdr->hmacDigest[4 ]);
iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_4);
typhoon_post_pci_writes(ioaddr);
iowrite32(TYPHOON_BOOTCMD_RUNTIME_IMAGE, ioaddr + TYPHOON_REG_COMMAND);
image_data += sizeof (struct typhoon_file_header);
/* The ioread32() in typhoon_wait_interrupt() will force the
* last write to the command register to post , so
* we don ' t need a typhoon_post_pci_writes ( ) after it .
*/
for (i = 0 ; i < numSections; i++) {
sHdr = (struct typhoon_section_header *) image_data;
image_data += sizeof (struct typhoon_section_header);
load_addr = le32_to_cpu(sHdr->startAddr);
section_len = le32_to_cpu(sHdr->len);
while (section_len) {
len = min_t(u32, section_len, PAGE_SIZE);
if (typhoon_wait_interrupt(ioaddr) < 0 ||
ioread32(ioaddr + TYPHOON_REG_STATUS) !=
TYPHOON_STATUS_WAITING_FOR_SEGMENT) {
netdev_err(tp->dev, "segment ready timeout\n" );
goto err_out_irq;
}
/* Do an pseudo IPv4 checksum on the data -- first
* need to convert each u16 to cpu order before
* summing . Fortunately , due to the properties of
* the checksum , we can do this once , at the end .
*/
csum = csum_fold(csum_partial_copy_nocheck(image_data,
dpage, len));
iowrite32(len, ioaddr + TYPHOON_REG_BOOT_LENGTH);
iowrite32(le16_to_cpu((__force __le16)csum),
ioaddr + TYPHOON_REG_BOOT_CHECKSUM);
iowrite32(load_addr,
ioaddr + TYPHOON_REG_BOOT_DEST_ADDR);
iowrite32(0 , ioaddr + TYPHOON_REG_BOOT_DATA_HI);
iowrite32(dpage_dma, ioaddr + TYPHOON_REG_BOOT_DATA_LO);
typhoon_post_pci_writes(ioaddr);
iowrite32(TYPHOON_BOOTCMD_SEG_AVAILABLE,
ioaddr + TYPHOON_REG_COMMAND);
image_data += len;
load_addr += len;
section_len -= len;
}
}
if (typhoon_wait_interrupt(ioaddr) < 0 ||
ioread32(ioaddr + TYPHOON_REG_STATUS) !=
TYPHOON_STATUS_WAITING_FOR_SEGMENT) {
netdev_err(tp->dev, "final segment ready timeout\n" );
goto err_out_irq;
}
iowrite32(TYPHOON_BOOTCMD_DNLD_COMPLETE, ioaddr + TYPHOON_REG_COMMAND);
if (typhoon_wait_status(ioaddr, TYPHOON_STATUS_WAITING_FOR_BOOT) < 0 ) {
netdev_err(tp->dev, "boot ready timeout, status 0x%0x\n" ,
ioread32(ioaddr + TYPHOON_REG_STATUS));
goto err_out_irq;
}
err = 0 ;
err_out_irq:
iowrite32(irqMasked, ioaddr + TYPHOON_REG_INTR_MASK);
iowrite32(irqEnabled, ioaddr + TYPHOON_REG_INTR_ENABLE);
dma_free_coherent(&pdev->dev, PAGE_SIZE, dpage, dpage_dma);
err_out:
return err;
}
static int
typhoon_boot_3XP(struct typhoon *tp, u32 initial_status)
{
void __iomem *ioaddr = tp->ioaddr;
if (typhoon_wait_status(ioaddr, initial_status) < 0 ) {
netdev_err(tp->dev, "boot ready timeout\n" );
goto out_timeout;
}
iowrite32(0 , ioaddr + TYPHOON_REG_BOOT_RECORD_ADDR_HI);
iowrite32(tp->shared_dma, ioaddr + TYPHOON_REG_BOOT_RECORD_ADDR_LO);
typhoon_post_pci_writes(ioaddr);
iowrite32(TYPHOON_BOOTCMD_REG_BOOT_RECORD,
ioaddr + TYPHOON_REG_COMMAND);
if (typhoon_wait_status(ioaddr, TYPHOON_STATUS_RUNNING) < 0 ) {
netdev_err(tp->dev, "boot finish timeout (status 0x%x)\n" ,
ioread32(ioaddr + TYPHOON_REG_STATUS));
goto out_timeout;
}
/* Clear the Transmit and Command ready registers
*/
iowrite32(0 , ioaddr + TYPHOON_REG_TX_HI_READY);
iowrite32(0 , ioaddr + TYPHOON_REG_CMD_READY);
iowrite32(0 , ioaddr + TYPHOON_REG_TX_LO_READY);
typhoon_post_pci_writes(ioaddr);
iowrite32(TYPHOON_BOOTCMD_BOOT, ioaddr + TYPHOON_REG_COMMAND);
return 0 ;
out_timeout:
return -ETIMEDOUT;
}
static u32
typhoon_clean_tx(struct typhoon *tp, struct transmit_ring *txRing,
volatile __le32 * index)
{
u32 lastRead = txRing->lastRead;
struct tx_desc *tx;
dma_addr_t skb_dma;
int dma_len;
int type;
while (lastRead != le32_to_cpu(*index)) {
tx = (struct tx_desc *) (txRing->ringBase + lastRead);
type = tx->flags & TYPHOON_TYPE_MASK;
if (type == TYPHOON_TX_DESC) {
/* This tx_desc describes a packet.
*/
unsigned long ptr = tx->tx_addr;
struct sk_buff *skb = (struct sk_buff *) ptr;
dev_kfree_skb_irq(skb);
} else if (type == TYPHOON_FRAG_DESC) {
/* This tx_desc describes a memory mapping. Free it.
*/
skb_dma = (dma_addr_t) le32_to_cpu(tx->frag.addr);
dma_len = le16_to_cpu(tx->len);
dma_unmap_single(&tp->pdev->dev, skb_dma, dma_len,
DMA_TO_DEVICE);
}
tx->flags = 0 ;
typhoon_inc_tx_index(&lastRead, 1 );
}
return lastRead;
}
static void
typhoon_tx_complete(struct typhoon *tp, struct transmit_ring *txRing,
volatile __le32 * index)
{
u32 lastRead;
int numDesc = MAX_SKB_FRAGS + 1 ;
/* This will need changing if we start to use the Hi Tx ring. */
lastRead = typhoon_clean_tx(tp, txRing, index);
if (netif_queue_stopped(tp->dev) && typhoon_num_free(txRing->lastWrite,
lastRead, TXLO_ENTRIES) > (numDesc + 2 ))
netif_wake_queue(tp->dev);
txRing->lastRead = lastRead;
smp_wmb();
}
static void
typhoon_recycle_rx_skb(struct typhoon *tp, u32 idx)
{
struct typhoon_indexes *indexes = tp->indexes;
struct rxbuff_ent *rxb = &tp->rxbuffers[idx];
struct basic_ring *ring = &tp->rxBuffRing;
struct rx_free *r;
if ((ring->lastWrite + sizeof (*r)) % (RXFREE_ENTRIES * sizeof (*r)) ==
le32_to_cpu(indexes->rxBuffCleared)) {
/* no room in ring, just drop the skb
*/
dev_kfree_skb_any(rxb->skb);
rxb->skb = NULL;
return ;
}
r = (struct rx_free *) (ring->ringBase + ring->lastWrite);
typhoon_inc_rxfree_index(&ring->lastWrite, 1 );
r->virtAddr = idx;
r->physAddr = cpu_to_le32(rxb->dma_addr);
/* Tell the card about it */
wmb();
indexes->rxBuffReady = cpu_to_le32(ring->lastWrite);
}
static int
typhoon_alloc_rx_skb(struct typhoon *tp, u32 idx)
{
struct typhoon_indexes *indexes = tp->indexes;
struct rxbuff_ent *rxb = &tp->rxbuffers[idx];
struct basic_ring *ring = &tp->rxBuffRing;
struct rx_free *r;
struct sk_buff *skb;
dma_addr_t dma_addr;
rxb->skb = NULL;
if ((ring->lastWrite + sizeof (*r)) % (RXFREE_ENTRIES * sizeof (*r)) ==
le32_to_cpu(indexes->rxBuffCleared))
return -ENOMEM;
skb = netdev_alloc_skb(tp->dev, PKT_BUF_SZ);
if (!skb)
return -ENOMEM;
#if 0
/* Please, 3com, fix the firmware to allow DMA to a unaligned
* address ! Pretty please ?
*/
skb_reserve(skb, 2 );
#endif
dma_addr = dma_map_single(&tp->pdev->dev, skb->data, PKT_BUF_SZ,
DMA_FROM_DEVICE);
/* Since no card does 64 bit DAC, the high bits will never
* change from zero .
*/
r = (struct rx_free *) (ring->ringBase + ring->lastWrite);
typhoon_inc_rxfree_index(&ring->lastWrite, 1 );
r->virtAddr = idx;
r->physAddr = cpu_to_le32(dma_addr);
rxb->skb = skb;
rxb->dma_addr = dma_addr;
/* Tell the card about it */
wmb();
indexes->rxBuffReady = cpu_to_le32(ring->lastWrite);
return 0 ;
}
static int
typhoon_rx(struct typhoon *tp, struct basic_ring *rxRing, volatile __le32 * ready,
volatile __le32 * cleared, int budget)
{
struct rx_desc *rx;
struct sk_buff *skb, *new_skb;
struct rxbuff_ent *rxb;
dma_addr_t dma_addr;
u32 local_ready;
u32 rxaddr;
int pkt_len;
u32 idx;
__le32 csum_bits;
int received;
received = 0 ;
local_ready = le32_to_cpu(*ready);
rxaddr = le32_to_cpu(*cleared);
while (rxaddr != local_ready && budget > 0 ) {
rx = (struct rx_desc *) (rxRing->ringBase + rxaddr);
idx = rx->addr;
rxb = &tp->rxbuffers[idx];
skb = rxb->skb;
dma_addr = rxb->dma_addr;
typhoon_inc_rx_index(&rxaddr, 1 );
if (rx->flags & TYPHOON_RX_ERROR) {
typhoon_recycle_rx_skb(tp, idx);
continue ;
}
pkt_len = le16_to_cpu(rx->frameLen);
if (pkt_len < rx_copybreak &&
(new_skb = netdev_alloc_skb(tp->dev, pkt_len + 2 )) != NULL) {
skb_reserve(new_skb, 2 );
dma_sync_single_for_cpu(&tp->pdev->dev, dma_addr,
PKT_BUF_SZ, DMA_FROM_DEVICE);
skb_copy_to_linear_data(new_skb, skb->data, pkt_len);
dma_sync_single_for_device(&tp->pdev->dev, dma_addr,
PKT_BUF_SZ,
DMA_FROM_DEVICE);
skb_put(new_skb, pkt_len);
typhoon_recycle_rx_skb(tp, idx);
} else {
new_skb = skb;
skb_put(new_skb, pkt_len);
dma_unmap_single(&tp->pdev->dev, dma_addr, PKT_BUF_SZ,
DMA_FROM_DEVICE);
typhoon_alloc_rx_skb(tp, idx);
}
new_skb->protocol = eth_type_trans(new_skb, tp->dev);
csum_bits = rx->rxStatus & (TYPHOON_RX_IP_CHK_GOOD |
TYPHOON_RX_UDP_CHK_GOOD | TYPHOON_RX_TCP_CHK_GOOD);
if (csum_bits ==
(TYPHOON_RX_IP_CHK_GOOD | TYPHOON_RX_TCP_CHK_GOOD) ||
csum_bits ==
(TYPHOON_RX_IP_CHK_GOOD | TYPHOON_RX_UDP_CHK_GOOD)) {
new_skb->ip_summed = CHECKSUM_UNNECESSARY;
} else
skb_checksum_none_assert(new_skb);
if (rx->rxStatus & TYPHOON_RX_VLAN)
__vlan_hwaccel_put_tag(new_skb, htons(ETH_P_8021Q),
ntohl(rx->vlanTag) & 0 xffff);
netif_receive_skb(new_skb);
received++;
budget--;
}
*cleared = cpu_to_le32(rxaddr);
return received;
}
static void
typhoon_fill_free_ring(struct typhoon *tp)
{
u32 i;
for (i = 0 ; i < RXENT_ENTRIES; i++) {
struct rxbuff_ent *rxb = &tp->rxbuffers[i];
if (rxb->skb)
continue ;
if (typhoon_alloc_rx_skb(tp, i) < 0 )
break ;
}
}
static int
typhoon_poll(struct napi_struct *napi, int budget)
{
struct typhoon *tp = container_of(napi, struct typhoon, napi);
struct typhoon_indexes *indexes = tp->indexes;
int work_done;
rmb();
if (!tp->awaiting_resp && indexes->respReady != indexes->respCleared)
typhoon_process_response(tp, 0 , NULL);
if (le32_to_cpu(indexes->txLoCleared) != tp->txLoRing.lastRead)
typhoon_tx_complete(tp, &tp->txLoRing, &indexes->txLoCleared);
work_done = 0 ;
if (indexes->rxHiCleared != indexes->rxHiReady) {
work_done += typhoon_rx(tp, &tp->rxHiRing, &indexes->rxHiReady,
&indexes->rxHiCleared, budget);
}
if (indexes->rxLoCleared != indexes->rxLoReady) {
work_done += typhoon_rx(tp, &tp->rxLoRing, &indexes->rxLoReady,
&indexes->rxLoCleared, budget - work_done);
}
if (le32_to_cpu(indexes->rxBuffCleared) == tp->rxBuffRing.lastWrite) {
/* rxBuff ring is empty, try to fill it. */
typhoon_fill_free_ring(tp);
}
if (work_done < budget) {
napi_complete_done(napi, work_done);
iowrite32(TYPHOON_INTR_NONE,
tp->ioaddr + TYPHOON_REG_INTR_MASK);
typhoon_post_pci_writes(tp->ioaddr);
}
return work_done;
}
static irqreturn_t
typhoon_interrupt(int irq, void *dev_instance)
{
struct net_device *dev = dev_instance;
struct typhoon *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->ioaddr;
u32 intr_status;
intr_status = ioread32(ioaddr + TYPHOON_REG_INTR_STATUS);
if (!(intr_status & TYPHOON_INTR_HOST_INT))
return IRQ_NONE;
iowrite32(intr_status, ioaddr + TYPHOON_REG_INTR_STATUS);
if (napi_schedule_prep(&tp->napi)) {
iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK);
typhoon_post_pci_writes(ioaddr);
__napi_schedule(&tp->napi);
} else {
netdev_err(dev, "Error, poll already scheduled\n" );
}
return IRQ_HANDLED;
}
static void
typhoon_free_rx_rings(struct typhoon *tp)
{
u32 i;
for (i = 0 ; i < RXENT_ENTRIES; i++) {
struct rxbuff_ent *rxb = &tp->rxbuffers[i];
if (rxb->skb) {
dma_unmap_single(&tp->pdev->dev, rxb->dma_addr,
PKT_BUF_SZ, DMA_FROM_DEVICE);
dev_kfree_skb(rxb->skb);
rxb->skb = NULL;
}
}
}
static int
typhoon_sleep_early(struct typhoon *tp, __le16 events)
{
void __iomem *ioaddr = tp->ioaddr;
struct cmd_desc xp_cmd;
int err;
INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_ENABLE_WAKE_EVENTS);
xp_cmd.parm1 = events;
err = typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
if (err < 0 ) {
netdev_err(tp->dev, "typhoon_sleep(): wake events cmd err %d\n" ,
err);
return err;
}
INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_GOTO_SLEEP);
err = typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
if (err < 0 ) {
netdev_err(tp->dev, "typhoon_sleep(): sleep cmd err %d\n" , err);
return err;
}
if (typhoon_wait_status(ioaddr, TYPHOON_STATUS_SLEEPING) < 0 )
return -ETIMEDOUT;
/* Since we cannot monitor the status of the link while sleeping,
* tell the world it went away .
*/
netif_carrier_off(tp->dev);
return 0 ;
}
static int
typhoon_sleep(struct typhoon *tp, pci_power_t state, __le16 events)
{
int err;
err = typhoon_sleep_early(tp, events);
if (err)
return err;
pci_enable_wake(tp->pdev, state, 1 );
pci_disable_device(tp->pdev);
return pci_set_power_state(tp->pdev, state);
}
static int
typhoon_wakeup(struct typhoon *tp, int wait_type)
{
void __iomem *ioaddr = tp->ioaddr;
/* Post 2.x.x versions of the Sleep Image require a reset before
* we can download the Runtime Image . But let ' s not make users of
* the old firmware pay for the reset .
*/
iowrite32(TYPHOON_BOOTCMD_WAKEUP, ioaddr + TYPHOON_REG_COMMAND);
if (typhoon_wait_status(ioaddr, TYPHOON_STATUS_WAITING_FOR_HOST) < 0 ||
(tp->capabilities & TYPHOON_WAKEUP_NEEDS_RESET))
return typhoon_reset(ioaddr, wait_type);
return 0 ;
}
static int
typhoon_start_runtime(struct typhoon *tp)
{
struct net_device *dev = tp->dev;
void __iomem *ioaddr = tp->ioaddr;
struct cmd_desc xp_cmd;
int err;
typhoon_init_rings(tp);
typhoon_fill_free_ring(tp);
err = typhoon_download_firmware(tp);
if (err < 0 ) {
netdev_err(tp->dev, "cannot load runtime on 3XP\n" );
goto error_out;
}
if (typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_BOOT) < 0 ) {
netdev_err(tp->dev, "cannot boot 3XP\n" );
err = -EIO;
goto error_out;
}
INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_MAX_PKT_SIZE);
xp_cmd.parm1 = cpu_to_le16(PKT_BUF_SZ);
err = typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
if (err < 0 )
goto error_out;
INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_MAC_ADDRESS);
xp_cmd.parm1 = cpu_to_le16(ntohs(*(__be16 *)&dev->dev_addr[0 ]));
xp_cmd.parm2 = cpu_to_le32(ntohl(*(__be32 *)&dev->dev_addr[2 ]));
err = typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
if (err < 0 )
goto error_out;
/* Disable IRQ coalescing -- we can reenable it when 3Com gives
* us some more information on how to control it .
*/
INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_IRQ_COALESCE_CTRL);
xp_cmd.parm1 = 0 ;
err = typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
if (err < 0 )
goto error_out;
INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_XCVR_SELECT);
xp_cmd.parm1 = tp->xcvr_select;
err = typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
if (err < 0 )
goto error_out;
INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_VLAN_TYPE_WRITE);
xp_cmd.parm1 = cpu_to_le16(ETH_P_8021Q);
err = typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
if (err < 0 )
goto error_out;
INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_OFFLOAD_TASKS);
xp_cmd.parm2 = tp->offload;
xp_cmd.parm3 = tp->offload;
err = typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
if (err < 0 )
goto error_out;
typhoon_set_rx_mode(dev);
INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_TX_ENABLE);
err = typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
if (err < 0 )
goto error_out;
INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_RX_ENABLE);
err = typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
if (err < 0 )
goto error_out;
tp->card_state = Running;
smp_wmb();
iowrite32(TYPHOON_INTR_ENABLE_ALL, ioaddr + TYPHOON_REG_INTR_ENABLE);
iowrite32(TYPHOON_INTR_NONE, ioaddr + TYPHOON_REG_INTR_MASK);
typhoon_post_pci_writes(ioaddr);
return 0 ;
error_out:
typhoon_reset(ioaddr, WaitNoSleep);
typhoon_free_rx_rings(tp);
typhoon_init_rings(tp);
return err;
}
static int
typhoon_stop_runtime(struct typhoon *tp, int wait_type)
{
struct typhoon_indexes *indexes = tp->indexes;
struct transmit_ring *txLo = &tp->txLoRing;
void __iomem *ioaddr = tp->ioaddr;
struct cmd_desc xp_cmd;
int i;
/* Disable interrupts early, since we can't schedule a poll
* when called with ! netif_running ( ) . This will be posted
* when we force the posting of the command .
*/
iowrite32(TYPHOON_INTR_NONE, ioaddr + TYPHOON_REG_INTR_ENABLE);
INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_RX_DISABLE);
typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
/* Wait 1/2 sec for any outstanding transmits to occur
* We ' ll cleanup after the reset if this times out .
*/
for (i = 0 ; i < TYPHOON_WAIT_TIMEOUT; i++) {
if (indexes->txLoCleared == cpu_to_le32(txLo->lastWrite))
break ;
udelay(TYPHOON_UDELAY);
}
if (i == TYPHOON_WAIT_TIMEOUT)
netdev_err(tp->dev, "halt timed out waiting for Tx to complete\n" );
INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_TX_DISABLE);
typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
/* save the statistics so when we bring the interface up again,
* the values reported to userspace are correct .
*/
tp->card_state = Sleeping;
smp_wmb();
typhoon_do_get_stats(tp);
memcpy(&tp->stats_saved, &tp->dev->stats, sizeof (struct net_device_stats));
INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_HALT);
typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL);
if (typhoon_wait_status(ioaddr, TYPHOON_STATUS_HALTED) < 0 )
netdev_err(tp->dev, "timed out waiting for 3XP to halt\n" );
if (typhoon_reset(ioaddr, wait_type) < 0 ) {
netdev_err(tp->dev, "unable to reset 3XP\n" );
return -ETIMEDOUT;
}
/* cleanup any outstanding Tx packets */
if (indexes->txLoCleared != cpu_to_le32(txLo->lastWrite)) {
indexes->txLoCleared = cpu_to_le32(txLo->lastWrite);
typhoon_clean_tx(tp, &tp->txLoRing, &indexes->txLoCleared);
}
return 0 ;
}
static void
typhoon_tx_timeout(struct net_device *dev, unsigned int txqueue)
{
struct typhoon *tp = netdev_priv(dev);
if (typhoon_reset(tp->ioaddr, WaitNoSleep) < 0 ) {
netdev_warn(dev, "could not reset in tx timeout\n" );
goto truly_dead;
}
/* If we ever start using the Hi ring, it will need cleaning too */
typhoon_clean_tx(tp, &tp->txLoRing, &tp->indexes->txLoCleared);
typhoon_free_rx_rings(tp);
if (typhoon_start_runtime(tp) < 0 ) {
netdev_err(dev, "could not start runtime in tx timeout\n" );
goto truly_dead;
}
netif_wake_queue(dev);
return ;
truly_dead:
/* Reset the hardware, and turn off carrier to avoid more timeouts */
typhoon_reset(tp->ioaddr, NoWait);
netif_carrier_off(dev);
}
static int
typhoon_open(struct net_device *dev)
{
struct typhoon *tp = netdev_priv(dev);
int err;
err = typhoon_request_firmware(tp);
if (err)
goto out;
pci_set_power_state(tp->pdev, PCI_D0);
pci_restore_state(tp->pdev);
err = typhoon_wakeup(tp, WaitSleep);
if (err < 0 ) {
netdev_err(dev, "unable to wakeup device\n" );
goto out_sleep;
}
err = request_irq(dev->irq, typhoon_interrupt, IRQF_SHARED,
dev->name, dev);
if (err < 0 )
goto out_sleep;
napi_enable(&tp->napi);
err = typhoon_start_runtime(tp);
if (err < 0 ) {
napi_disable(&tp->napi);
goto out_irq;
}
netif_start_queue(dev);
return 0 ;
out_irq:
free_irq(dev->irq, dev);
out_sleep:
if (typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_HOST) < 0 ) {
netdev_err(dev, "unable to reboot into sleep img\n" );
typhoon_reset(tp->ioaddr, NoWait);
goto out;
}
if (typhoon_sleep(tp, PCI_D3hot, 0 ) < 0 )
netdev_err(dev, "unable to go back to sleep\n" );
out:
return err;
}
static int
typhoon_close(struct net_device *dev)
{
struct typhoon *tp = netdev_priv(dev);
netif_stop_queue(dev);
napi_disable(&tp->napi);
if (typhoon_stop_runtime(tp, WaitSleep) < 0 )
netdev_err(dev, "unable to stop runtime\n" );
/* Make sure there is no irq handler running on a different CPU. */
free_irq(dev->irq, dev);
typhoon_free_rx_rings(tp);
typhoon_init_rings(tp);
if (typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_HOST) < 0 )
netdev_err(dev, "unable to boot sleep image\n" );
if (typhoon_sleep(tp, PCI_D3hot, 0 ) < 0 )
netdev_err(dev, "unable to put card to sleep\n" );
return 0 ;
}
static int __maybe_unused
typhoon_resume(struct device *dev_d)
{
struct net_device *dev = dev_get_drvdata(dev_d);
struct typhoon *tp = netdev_priv(dev);
/* If we're down, resume when we are upped.
*/
if (!netif_running(dev))
return 0 ;
if (typhoon_wakeup(tp, WaitNoSleep) < 0 ) {
netdev_err(dev, "critical: could not wake up in resume\n" );
goto reset;
}
if (typhoon_start_runtime(tp) < 0 ) {
netdev_err(dev, "critical: could not start runtime in resume\n" );
goto reset;
}
netif_device_attach(dev);
return 0 ;
reset:
typhoon_reset(tp->ioaddr, NoWait);
return -EBUSY;
}
static int __maybe_unused
typhoon_suspend(struct device *dev_d)
{
struct pci_dev *pdev = to_pci_dev(dev_d);
struct net_device *dev = pci_get_drvdata(pdev);
struct typhoon *tp = netdev_priv(dev);
struct cmd_desc xp_cmd;
/* If we're down, we're already suspended.
*/
if (!netif_running(dev))
return 0 ;
/* TYPHOON_OFFLOAD_VLAN is always on now, so this doesn't work */
if (tp->wol_events & TYPHOON_WAKE_MAGIC_PKT)
netdev_warn(dev, "cannot do WAKE_MAGIC with VLAN offloading\n" );
netif_device_detach(dev);
if (typhoon_stop_runtime(tp, WaitNoSleep) < 0 ) {
netdev_err(dev, "unable to stop runtime\n" );
goto need_resume;
}
typhoon_free_rx_rings(tp);
typhoon_init_rings(tp);
if (typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_HOST) < 0 ) {
netdev_err(dev, "unable to boot sleep image\n" );
goto need_resume;
}
INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_MAC_ADDRESS);
xp_cmd.parm1 = cpu_to_le16(ntohs(*(__be16 *)&dev->dev_addr[0 ]));
xp_cmd.parm2 = cpu_to_le32(ntohl(*(__be32 *)&dev->dev_addr[2 ]));
if (typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL) < 0 ) {
netdev_err(dev, "unable to set mac address in suspend\n" );
goto need_resume;
}
INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_RX_FILTER);
xp_cmd.parm1 = TYPHOON_RX_FILTER_DIRECTED | TYPHOON_RX_FILTER_BROADCAST;
if (typhoon_issue_command(tp, 1 , &xp_cmd, 0 , NULL) < 0 ) {
netdev_err(dev, "unable to set rx filter in suspend\n" );
goto need_resume;
}
if (typhoon_sleep_early(tp, tp->wol_events) < 0 ) {
netdev_err(dev, "unable to put card to sleep\n" );
goto need_resume;
}
device_wakeup_enable(dev_d);
return 0 ;
need_resume:
typhoon_resume(dev_d);
return -EBUSY;
}
static int
typhoon_test_mmio(struct pci_dev *pdev)
{
void __iomem *ioaddr = pci_iomap(pdev, 1 , 128 );
int mode = 0 ;
u32 val;
if (!ioaddr)
goto out;
if (ioread32(ioaddr + TYPHOON_REG_STATUS) !=
TYPHOON_STATUS_WAITING_FOR_HOST)
goto out_unmap;
iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK);
iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_STATUS);
iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_ENABLE);
/* Ok, see if we can change our interrupt status register by
* sending ourselves an interrupt . If so , then MMIO works .
* The 50 usec delay is arbitrary - - it could probably be smaller .
*/
val = ioread32(ioaddr + TYPHOON_REG_INTR_STATUS);
if ((val & TYPHOON_INTR_SELF) == 0 ) {
iowrite32(1 , ioaddr + TYPHOON_REG_SELF_INTERRUPT);
ioread32(ioaddr + TYPHOON_REG_INTR_STATUS);
udelay(50 );
val = ioread32(ioaddr + TYPHOON_REG_INTR_STATUS);
if (val & TYPHOON_INTR_SELF)
mode = 1 ;
}
iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK);
iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_STATUS);
iowrite32(TYPHOON_INTR_NONE, ioaddr + TYPHOON_REG_INTR_ENABLE);
ioread32(ioaddr + TYPHOON_REG_INTR_STATUS);
out_unmap:
pci_iounmap(pdev, ioaddr);
out:
if (!mode)
pr_info("%s: falling back to port IO\n" , pci_name(pdev));
return mode;
}
#if MAX_SKB_FRAGS > 32
#include <net/vxlan.h>
static netdev_features_t typhoon_features_check(struct sk_buff *skb,
struct net_device *dev,
netdev_features_t features)
{
if (skb_shinfo(skb)->nr_frags > 32 && skb_is_gso(skb))
features &= ~NETIF_F_GSO_MASK;
features = vlan_features_check(skb, features);
return vxlan_features_check(skb, features);
}
#endif
static const struct net_device_ops typhoon_netdev_ops = {
.ndo_open = typhoon_open,
.ndo_stop = typhoon_close,
#if MAX_SKB_FRAGS > 32
.ndo_features_check = typhoon_features_check,
#endif
.ndo_start_xmit = typhoon_start_tx,
.ndo_set_rx_mode = typhoon_set_rx_mode,
.ndo_tx_timeout = typhoon_tx_timeout,
.ndo_get_stats = typhoon_get_stats,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
};
static int
typhoon_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct net_device *dev;
struct typhoon *tp;
int card_id = (int ) ent->driver_data;
u8 addr[ETH_ALEN] __aligned(4 );
void __iomem *ioaddr;
void *shared;
dma_addr_t shared_dma;
struct cmd_desc xp_cmd;
struct resp_desc xp_resp[3 ];
int err = 0 ;
const char *err_msg;
dev = alloc_etherdev(sizeof (*tp));
if (dev == NULL) {
err_msg = "unable to alloc new net device" ;
err = -ENOMEM;
goto error_out;
}
SET_NETDEV_DEV(dev, &pdev->dev);
err = pci_enable_device(pdev);
if (err < 0 ) {
err_msg = "unable to enable device" ;
goto error_out_dev;
}
err = pci_set_mwi(pdev);
if (err < 0 ) {
err_msg = "unable to set MWI" ;
goto error_out_disable;
}
err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32 ));
if (err < 0 ) {
err_msg = "No usable DMA configuration" ;
goto error_out_mwi;
}
/* sanity checks on IO and MMIO BARs
*/
if (!(pci_resource_flags(pdev, 0 ) & IORESOURCE_IO)) {
err_msg = "region #1 not a PCI IO resource, aborting" ;
err = -ENODEV;
goto error_out_mwi;
}
if (pci_resource_len(pdev, 0 ) < 128 ) {
err_msg = "Invalid PCI IO region size, aborting" ;
err = -ENODEV;
goto error_out_mwi;
}
if (!(pci_resource_flags(pdev, 1 ) & IORESOURCE_MEM)) {
err_msg = "region #1 not a PCI MMIO resource, aborting" ;
err = -ENODEV;
goto error_out_mwi;
}
if (pci_resource_len(pdev, 1 ) < 128 ) {
err_msg = "Invalid PCI MMIO region size, aborting" ;
err = -ENODEV;
goto error_out_mwi;
}
err = pci_request_regions(pdev, KBUILD_MODNAME);
if (err < 0 ) {
err_msg = "could not request regions" ;
goto error_out_mwi;
}
/* map our registers
*/
if (use_mmio != 0 && use_mmio != 1 )
use_mmio = typhoon_test_mmio(pdev);
ioaddr = pci_iomap(pdev, use_mmio, 128 );
if (!ioaddr) {
err_msg = "cannot remap registers, aborting" ;
err = -EIO;
goto error_out_regions;
}
/* allocate pci dma space for rx and tx descriptor rings
*/
shared = dma_alloc_coherent(&pdev->dev, sizeof (struct typhoon_shared),
&shared_dma, GFP_KERNEL);
if (!shared) {
err_msg = "could not allocate DMA memory" ;
err = -ENOMEM;
goto error_out_remap;
}
dev->irq = pdev->irq;
tp = netdev_priv(dev);
tp->shared = shared;
tp->shared_dma = shared_dma;
tp->pdev = pdev;
tp->tx_pdev = pdev;
tp->ioaddr = ioaddr;
tp->tx_ioaddr = ioaddr;
tp->dev = dev;
/* Init sequence:
* 1 ) Reset the adapter to clear any bad juju
* 2 ) Reload the sleep image
* 3 ) Boot the sleep image
* 4 ) Get the hardware address .
* 5 ) Put the card to sleep .
*/
err = typhoon_reset(ioaddr, WaitSleep);
if (err < 0 ) {
err_msg = "could not reset 3XP" ;
goto error_out_dma;
}
/* Now that we've reset the 3XP and are sure it's not going to
* write all over memory , enable bus mastering , and save our
* state for resuming after a suspend .
*/
pci_set_master(pdev);
pci_save_state(pdev);
typhoon_init_interface(tp);
typhoon_init_rings(tp);
err = typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_HOST);
if (err < 0 ) {
err_msg = "cannot boot 3XP sleep image" ;
goto error_out_reset;
}
INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_MAC_ADDRESS);
err = typhoon_issue_command(tp, 1 , &xp_cmd, 1 , xp_resp);
if (err < 0 ) {
err_msg = "cannot read MAC address" ;
goto error_out_reset;
}
*(__be16 *)&addr[0 ] = htons(le16_to_cpu(xp_resp[0 ].parm1));
*(__be32 *)&addr[2 ] = htonl(le32_to_cpu(xp_resp[0 ].parm2));
eth_hw_addr_set(dev, addr);
if (!is_valid_ether_addr(dev->dev_addr)) {
err_msg = "Could not obtain valid ethernet address, aborting" ;
err = -EIO;
goto error_out_reset;
}
/* Read the Sleep Image version last, so the response is valid
* later when we print out the version reported .
*/
INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_VERSIONS);
err = typhoon_issue_command(tp, 1 , &xp_cmd, 3 , xp_resp);
if (err < 0 ) {
err_msg = "Could not get Sleep Image version" ;
goto error_out_reset;
}
tp->capabilities = typhoon_card_info[card_id].capabilities;
tp->xcvr_select = TYPHOON_XCVR_AUTONEG;
/* Typhoon 1.0 Sleep Images return one response descriptor to the
* READ_VERSIONS command . Those versions are OK after waking up
* from sleep without needing a reset . Typhoon 1 . 1 + Sleep Images
* seem to need a little extra help to get started . Since we don ' t
* know how to nudge it along , just kick it .
*/
if (xp_resp[0 ].numDesc != 0 )
tp->capabilities |= TYPHOON_WAKEUP_NEEDS_RESET;
err = typhoon_sleep(tp, PCI_D3hot, 0 );
if (err < 0 ) {
err_msg = "cannot put adapter to sleep" ;
goto error_out_reset;
}
/* The chip-specific entries in the device structure. */
dev->netdev_ops = &typhoon_netdev_ops;
netif_napi_add_weight(dev, &tp->napi, typhoon_poll, 16 );
dev->watchdog_timeo = TX_TIMEOUT;
dev->ethtool_ops = &typhoon_ethtool_ops;
/* We can handle scatter gather, up to 16 entries, and
* we can do IP checksumming ( only version 4 , doh . . . )
*
* There ' s no way to turn off the RX VLAN offloading and stripping
* on the current 3 XP firmware - - it does not respect the offload
* settings - - so we only allow the user to toggle the TX processing .
*/
dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
NETIF_F_HW_VLAN_CTAG_TX;
dev->features = dev->hw_features |
NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_RXCSUM;
err = register_netdev(dev);
if (err < 0 ) {
err_msg = "unable to register netdev" ;
goto error_out_reset;
}
pci_set_drvdata(pdev, dev);
netdev_info(dev, "%s at %s 0x%llx, %pM\n" ,
typhoon_card_info[card_id].name,
use_mmio ? "MMIO" : "IO" ,
(unsigned long long )pci_resource_start(pdev, use_mmio),
dev->dev_addr);
/* xp_resp still contains the response to the READ_VERSIONS command.
* For debugging , let the user know what version he has .
*/
if (xp_resp[0 ].numDesc == 0 ) {
/* This is the Typhoon 1.0 type Sleep Image, last 16 bits
* of version is Month / Day of build .
*/
u16 monthday = le32_to_cpu(xp_resp[0 ].parm2) & 0 xffff;
netdev_info(dev, "Typhoon 1.0 Sleep Image built %02u/%02u/2000\n" ,
monthday >> 8 , monthday & 0 xff);
} else if (xp_resp[0 ].numDesc == 2 ) {
/* This is the Typhoon 1.1+ type Sleep Image
*/
u32 sleep_ver = le32_to_cpu(xp_resp[0 ].parm2);
u8 *ver_string = (u8 *) &xp_resp[1 ];
ver_string[25 ] = 0 ;
netdev_info(dev, "Typhoon 1.1+ Sleep Image version %02x.%03x.%03x %s\n" ,
sleep_ver >> 24 , (sleep_ver >> 12 ) & 0 xfff,
sleep_ver & 0 xfff, ver_string);
} else {
netdev_warn(dev, "Unknown Sleep Image version (%u:%04x)\n" ,
xp_resp[0 ].numDesc, le32_to_cpu(xp_resp[0 ].parm2));
}
return 0 ;
error_out_reset:
typhoon_reset(ioaddr, NoWait);
error_out_dma:
dma_free_coherent(&pdev->dev, sizeof (struct typhoon_shared), shared,
shared_dma);
error_out_remap:
pci_iounmap(pdev, ioaddr);
error_out_regions:
pci_release_regions(pdev);
error_out_mwi:
pci_clear_mwi(pdev);
error_out_disable:
pci_disable_device(pdev);
error_out_dev:
free_netdev(dev);
error_out:
pr_err("%s: %s\n" , pci_name(pdev), err_msg);
return err;
}
static void
typhoon_remove_one(struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct typhoon *tp = netdev_priv(dev);
unregister_netdev(dev);
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
typhoon_reset(tp->ioaddr, NoWait);
pci_iounmap(pdev, tp->ioaddr);
dma_free_coherent(&pdev->dev, sizeof (struct typhoon_shared),
tp->shared, tp->shared_dma);
pci_release_regions(pdev);
pci_clear_mwi(pdev);
pci_disable_device(pdev);
free_netdev(dev);
}
static SIMPLE_DEV_PM_OPS(typhoon_pm_ops, typhoon_suspend, typhoon_resume);
static struct pci_driver typhoon_driver = {
.name = KBUILD_MODNAME,
.id_table = typhoon_pci_tbl,
.probe = typhoon_init_one,
.remove = typhoon_remove_one,
.driver.pm = &typhoon_pm_ops,
};
static int __init
typhoon_init(void )
{
return pci_register_driver(&typhoon_driver);
}
static void __exit
typhoon_cleanup(void )
{
release_firmware(typhoon_fw);
pci_unregister_driver(&typhoon_driver);
}
module_init(typhoon_init);
module_exit(typhoon_cleanup);
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