/********************************************************************** * Author: Cavium, Inc. * * Contact: support@cavium.com * Please include "LiquidIO" in the subject. * * Copyright (c) 2003-2016 Cavium, Inc. * * This file is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, Version 2, as * published by the Free Software Foundation. * * This file is distributed in the hope that it will be useful, but * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or * NONINFRINGEMENT. See the GNU General Public License for more details.
***********************************************************************/ /*! \file octeon_iq.h * \brief Host Driver: Implementation of Octeon input queues. "Input" is * with respect to the Octeon device on the NIC. From this driver's * point of view they are egress queues.
*/
/** Input Queue statistics. Each input queue has four stats fields. */ struct oct_iq_stats {
u64 instr_posted; /**< Instructions posted to this queue. */
u64 instr_processed; /**< Instructions processed in this queue. */
u64 instr_dropped; /**< Instructions that could not be processed */
u64 bytes_sent; /**< Bytes sent through this queue. */
u64 sgentry_sent;/**< Gather entries sent through this queue. */
u64 tx_done;/**< Num of packets sent to network. */
u64 tx_iq_busy;/**< Numof times this iq was found to be full. */
u64 tx_dropped;/**< Numof pkts dropped dueto xmitpath errors. */
u64 tx_tot_bytes;/**< Total count of bytes sento to network. */
u64 tx_gso; /* count of tso */
u64 tx_vxlan; /* tunnel */
u64 tx_dmamap_fail; /* Number of times dma mapping failed */
u64 tx_restart; /* Number of times this queue restarted */
};
/** The instruction (input) queue. * The input queue is used to post raw (instruction) mode data or packet * data to Octeon device from the host. Each input queue (upto 4) for * a Octeon device has one such structure to represent it.
*/ struct octeon_instr_queue { struct octeon_device *oct_dev;
/** A spinlock to protect access to the input ring. */
spinlock_t lock;
/** A spinlock to protect while posting on the ring. */
spinlock_t post_lock;
/** This flag indicates if the queue can be used for soft commands. * If this flag is set, post_lock must be acquired before posting * a command to the queue. * If this flag is clear, post_lock is invalid for the queue. * All control commands (soft commands) will go through only Queue 0 * (control and data queue). So only queue-0 needs post_lock, * other queues are only data queues and does not need post_lock
*/ bool allow_soft_cmds;
u32 pkt_in_done;
u32 pkts_processed;
/** A spinlock to protect access to the input ring.*/
spinlock_t iq_flush_running_lock;
/** Flag that indicates if the queue uses 64 byte commands. */
u32 iqcmd_64B:1;
/** Queue info. */ union oct_txpciq txpciq;
u32 rsvd:17;
/* Controls whether extra flushing of IQ is done on Tx */
u32 do_auto_flush:1;
u32 status:8;
/** Maximum no. of instructions in this queue. */
u32 max_count;
/** Index in input ring where the driver should write the next packet */
u32 host_write_index;
/** Index in input ring where Octeon is expected to read the next * packet.
*/
u32 octeon_read_index;
/** This index aids in finding the window in the queue where Octeon * has read the commands.
*/
u32 flush_index;
/** This field keeps track of the instructions pending in this queue. */
atomic_t instr_pending;
u32 reset_instr_cnt;
/** Pointer to the Virtual Base addr of the input ring. */
u8 *base_addr;
struct octeon_request_list *request_list;
/** Octeon doorbell register for the ring. */ void __iomem *doorbell_reg;
/** Octeon instruction count register for this ring. */ void __iomem *inst_cnt_reg;
/** Number of instructions pending to be posted to Octeon. */
u32 fill_cnt;
/** The max. number of instructions that can be held pending by the * driver.
*/
u32 fill_threshold;
/** The last time that the doorbell was rung. */
u64 last_db_time;
/** The doorbell timeout. If the doorbell was not rung for this time and * fill_cnt is non-zero, ring the doorbell again.
*/
u32 db_timeout;
/** Statistics for this input queue. */ struct oct_iq_stats stats;
/** DMA mapped base address of the input descriptor ring. */
dma_addr_t base_addr_dma;
/** Application context */ void *app_ctx;
/* network stack queue index */ int q_index;
/*os ifidx associated with this queue */ int ifidx;
};
/*---------------------- INSTRUCTION FORMAT ----------------------------*/
/** 32-byte instruction format. * Format of instruction for a 32-byte mode input queue.
*/ struct octeon_instr_32B { /** Pointer where the input data is available. */
u64 dptr;
/** Instruction Header. */
u64 ih;
/** Pointer where the response for a RAW mode packet will be written * by Octeon.
*/
u64 rptr;
/** Input Request Header. Additional info about the input. */
u64 irh;
/** 64-byte instruction format. * Format of instruction for a 64-byte mode input queue.
*/ struct octeon_instr2_64B { /** Pointer where the input data is available. */
u64 dptr;
/** Instruction Header. */
u64 ih2;
/** Input Request Header. */
u64 irh;
/** opcode/subcode specific parameters */
u64 ossp[2];
/** Return Data Parameters */
u64 rdp;
/** Pointer where the response for a RAW mode packet will be written * by Octeon.
*/
u64 rptr;
u64 reserved;
};
struct octeon_instr3_64B { /** Pointer where the input data is available. */
u64 dptr;
/** Instruction Header. */
u64 ih3;
/** Instruction Header. */
u64 pki_ih3;
/** Input Request Header. */
u64 irh;
/** opcode/subcode specific parameters */
u64 ossp[2];
/** Return Data Parameters */
u64 rdp;
/** Pointer where the response for a RAW mode packet will be written * by Octeon.
*/
u64 rptr;
};
union octeon_instr_64B { struct octeon_instr2_64B cmd2; struct octeon_instr3_64B cmd3;
};
/** Context buffer info */ void *ctxptr;
u32 ctxsize;
/** Time out and callback */
size_t expiry_time;
u32 iq_no; void (*callback)(struct octeon_device *, u32, void *); void *callback_arg;
int caller_is_done;
u32 sc_status; struct completion complete;
};
/* max timeout (in milli sec) for soft request */ #define LIO_SC_MAX_TMO_MS 60000
/** Maximum number of buffers to allocate into soft command buffer pool
*/ #define MAX_SOFT_COMMAND_BUFFERS 256
/** Head of a soft command buffer pool.
*/ struct octeon_sc_buffer_pool { /** List structure to add delete pending entries to */ struct list_head head;
/** A lock for this response list */
spinlock_t lock;
int octeon_setup_sc_buffer_pool(struct octeon_device *oct); int octeon_free_sc_done_list(struct octeon_device *oct); int octeon_free_sc_zombie_list(struct octeon_device *oct); int octeon_free_sc_buffer_pool(struct octeon_device *oct); struct octeon_soft_command *
octeon_alloc_soft_command(struct octeon_device *oct,
u32 datasize, u32 rdatasize,
u32 ctxsize); void octeon_free_soft_command(struct octeon_device *oct, struct octeon_soft_command *sc);
/** * octeon_init_instr_queue() * @param octeon_dev - pointer to the octeon device structure. * @param txpciq - queue to be initialized (0 <= q_no <= 3). * * Called at driver init time for each input queue. iq_conf has the * configuration parameters for the queue. * * @return Success: 0 Failure: 1
*/ int octeon_init_instr_queue(struct octeon_device *octeon_dev, union oct_txpciq txpciq,
u32 num_descs);
/** * octeon_delete_instr_queue() * @param octeon_dev - pointer to the octeon device structure. * @param iq_no - queue to be deleted (0 <= q_no <= 3). * * Called at driver unload time for each input queue. Deletes all * allocated resources for the input queue. * * @return Success: 0 Failure: 1
*/ int octeon_delete_instr_queue(struct octeon_device *octeon_dev, u32 iq_no);
int lio_wait_for_instr_fetch(struct octeon_device *oct);
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