| /* |
| * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #include <asm-generic/kmap_types.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/errno.h> |
| #include <linux/pci.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/slab.h> |
| #include <linux/delay.h> |
| #include <linux/random.h> |
| #include <linux/io-mapping.h> |
| #include <linux/mlx5/driver.h> |
| #include <linux/debugfs.h> |
| |
| #include "mlx5_core.h" |
| |
| enum { |
| CMD_IF_REV = 3, |
| }; |
| |
| enum { |
| CMD_MODE_POLLING, |
| CMD_MODE_EVENTS |
| }; |
| |
| enum { |
| NUM_LONG_LISTS = 2, |
| NUM_MED_LISTS = 64, |
| LONG_LIST_SIZE = (2ULL * 1024 * 1024 * 1024 / PAGE_SIZE) * 8 + 16 + |
| MLX5_CMD_DATA_BLOCK_SIZE, |
| MED_LIST_SIZE = 16 + MLX5_CMD_DATA_BLOCK_SIZE, |
| }; |
| |
| enum { |
| MLX5_CMD_DELIVERY_STAT_OK = 0x0, |
| MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR = 0x1, |
| MLX5_CMD_DELIVERY_STAT_TOK_ERR = 0x2, |
| MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR = 0x3, |
| MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR = 0x4, |
| MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR = 0x5, |
| MLX5_CMD_DELIVERY_STAT_FW_ERR = 0x6, |
| MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR = 0x7, |
| MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR = 0x8, |
| MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR = 0x9, |
| MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR = 0x10, |
| }; |
| |
| enum { |
| MLX5_CMD_STAT_OK = 0x0, |
| MLX5_CMD_STAT_INT_ERR = 0x1, |
| MLX5_CMD_STAT_BAD_OP_ERR = 0x2, |
| MLX5_CMD_STAT_BAD_PARAM_ERR = 0x3, |
| MLX5_CMD_STAT_BAD_SYS_STATE_ERR = 0x4, |
| MLX5_CMD_STAT_BAD_RES_ERR = 0x5, |
| MLX5_CMD_STAT_RES_BUSY = 0x6, |
| MLX5_CMD_STAT_LIM_ERR = 0x8, |
| MLX5_CMD_STAT_BAD_RES_STATE_ERR = 0x9, |
| MLX5_CMD_STAT_IX_ERR = 0xa, |
| MLX5_CMD_STAT_NO_RES_ERR = 0xf, |
| MLX5_CMD_STAT_BAD_INP_LEN_ERR = 0x50, |
| MLX5_CMD_STAT_BAD_OUTP_LEN_ERR = 0x51, |
| MLX5_CMD_STAT_BAD_QP_STATE_ERR = 0x10, |
| MLX5_CMD_STAT_BAD_PKT_ERR = 0x30, |
| MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR = 0x40, |
| }; |
| |
| static struct mlx5_cmd_work_ent *alloc_cmd(struct mlx5_cmd *cmd, |
| struct mlx5_cmd_msg *in, |
| struct mlx5_cmd_msg *out, |
| mlx5_cmd_cbk_t cbk, |
| void *context, int page_queue) |
| { |
| gfp_t alloc_flags = cbk ? GFP_ATOMIC : GFP_KERNEL; |
| struct mlx5_cmd_work_ent *ent; |
| |
| ent = kzalloc(sizeof(*ent), alloc_flags); |
| if (!ent) |
| return ERR_PTR(-ENOMEM); |
| |
| ent->in = in; |
| ent->out = out; |
| ent->callback = cbk; |
| ent->context = context; |
| ent->cmd = cmd; |
| ent->page_queue = page_queue; |
| |
| return ent; |
| } |
| |
| static u8 alloc_token(struct mlx5_cmd *cmd) |
| { |
| u8 token; |
| |
| spin_lock(&cmd->token_lock); |
| token = cmd->token++ % 255 + 1; |
| spin_unlock(&cmd->token_lock); |
| |
| return token; |
| } |
| |
| static int alloc_ent(struct mlx5_cmd *cmd) |
| { |
| unsigned long flags; |
| int ret; |
| |
| spin_lock_irqsave(&cmd->alloc_lock, flags); |
| ret = find_first_bit(&cmd->bitmask, cmd->max_reg_cmds); |
| if (ret < cmd->max_reg_cmds) |
| clear_bit(ret, &cmd->bitmask); |
| spin_unlock_irqrestore(&cmd->alloc_lock, flags); |
| |
| return ret < cmd->max_reg_cmds ? ret : -ENOMEM; |
| } |
| |
| static void free_ent(struct mlx5_cmd *cmd, int idx) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&cmd->alloc_lock, flags); |
| set_bit(idx, &cmd->bitmask); |
| spin_unlock_irqrestore(&cmd->alloc_lock, flags); |
| } |
| |
| static struct mlx5_cmd_layout *get_inst(struct mlx5_cmd *cmd, int idx) |
| { |
| return cmd->cmd_buf + (idx << cmd->log_stride); |
| } |
| |
| static u8 xor8_buf(void *buf, int len) |
| { |
| u8 *ptr = buf; |
| u8 sum = 0; |
| int i; |
| |
| for (i = 0; i < len; i++) |
| sum ^= ptr[i]; |
| |
| return sum; |
| } |
| |
| static int verify_block_sig(struct mlx5_cmd_prot_block *block) |
| { |
| if (xor8_buf(block->rsvd0, sizeof(*block) - sizeof(block->data) - 1) != 0xff) |
| return -EINVAL; |
| |
| if (xor8_buf(block, sizeof(*block)) != 0xff) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static void calc_block_sig(struct mlx5_cmd_prot_block *block, u8 token) |
| { |
| block->token = token; |
| block->ctrl_sig = ~xor8_buf(block->rsvd0, sizeof(*block) - sizeof(block->data) - 2); |
| block->sig = ~xor8_buf(block, sizeof(*block) - 1); |
| } |
| |
| static void calc_chain_sig(struct mlx5_cmd_msg *msg, u8 token) |
| { |
| struct mlx5_cmd_mailbox *next = msg->next; |
| |
| while (next) { |
| calc_block_sig(next->buf, token); |
| next = next->next; |
| } |
| } |
| |
| static void set_signature(struct mlx5_cmd_work_ent *ent) |
| { |
| ent->lay->sig = ~xor8_buf(ent->lay, sizeof(*ent->lay)); |
| calc_chain_sig(ent->in, ent->token); |
| calc_chain_sig(ent->out, ent->token); |
| } |
| |
| static void poll_timeout(struct mlx5_cmd_work_ent *ent) |
| { |
| unsigned long poll_end = jiffies + msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC + 1000); |
| u8 own; |
| |
| do { |
| own = ent->lay->status_own; |
| if (!(own & CMD_OWNER_HW)) { |
| ent->ret = 0; |
| return; |
| } |
| usleep_range(5000, 10000); |
| } while (time_before(jiffies, poll_end)); |
| |
| ent->ret = -ETIMEDOUT; |
| } |
| |
| static void free_cmd(struct mlx5_cmd_work_ent *ent) |
| { |
| kfree(ent); |
| } |
| |
| |
| static int verify_signature(struct mlx5_cmd_work_ent *ent) |
| { |
| struct mlx5_cmd_mailbox *next = ent->out->next; |
| int err; |
| u8 sig; |
| |
| sig = xor8_buf(ent->lay, sizeof(*ent->lay)); |
| if (sig != 0xff) |
| return -EINVAL; |
| |
| while (next) { |
| err = verify_block_sig(next->buf); |
| if (err) |
| return err; |
| |
| next = next->next; |
| } |
| |
| return 0; |
| } |
| |
| static void dump_buf(void *buf, int size, int data_only, int offset) |
| { |
| __be32 *p = buf; |
| int i; |
| |
| for (i = 0; i < size; i += 16) { |
| pr_debug("%03x: %08x %08x %08x %08x\n", offset, be32_to_cpu(p[0]), |
| be32_to_cpu(p[1]), be32_to_cpu(p[2]), |
| be32_to_cpu(p[3])); |
| p += 4; |
| offset += 16; |
| } |
| if (!data_only) |
| pr_debug("\n"); |
| } |
| |
| const char *mlx5_command_str(int command) |
| { |
| switch (command) { |
| case MLX5_CMD_OP_QUERY_HCA_CAP: |
| return "QUERY_HCA_CAP"; |
| |
| case MLX5_CMD_OP_SET_HCA_CAP: |
| return "SET_HCA_CAP"; |
| |
| case MLX5_CMD_OP_QUERY_ADAPTER: |
| return "QUERY_ADAPTER"; |
| |
| case MLX5_CMD_OP_INIT_HCA: |
| return "INIT_HCA"; |
| |
| case MLX5_CMD_OP_TEARDOWN_HCA: |
| return "TEARDOWN_HCA"; |
| |
| case MLX5_CMD_OP_QUERY_PAGES: |
| return "QUERY_PAGES"; |
| |
| case MLX5_CMD_OP_MANAGE_PAGES: |
| return "MANAGE_PAGES"; |
| |
| case MLX5_CMD_OP_CREATE_MKEY: |
| return "CREATE_MKEY"; |
| |
| case MLX5_CMD_OP_QUERY_MKEY: |
| return "QUERY_MKEY"; |
| |
| case MLX5_CMD_OP_DESTROY_MKEY: |
| return "DESTROY_MKEY"; |
| |
| case MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS: |
| return "QUERY_SPECIAL_CONTEXTS"; |
| |
| case MLX5_CMD_OP_CREATE_EQ: |
| return "CREATE_EQ"; |
| |
| case MLX5_CMD_OP_DESTROY_EQ: |
| return "DESTROY_EQ"; |
| |
| case MLX5_CMD_OP_QUERY_EQ: |
| return "QUERY_EQ"; |
| |
| case MLX5_CMD_OP_CREATE_CQ: |
| return "CREATE_CQ"; |
| |
| case MLX5_CMD_OP_DESTROY_CQ: |
| return "DESTROY_CQ"; |
| |
| case MLX5_CMD_OP_QUERY_CQ: |
| return "QUERY_CQ"; |
| |
| case MLX5_CMD_OP_MODIFY_CQ: |
| return "MODIFY_CQ"; |
| |
| case MLX5_CMD_OP_CREATE_QP: |
| return "CREATE_QP"; |
| |
| case MLX5_CMD_OP_DESTROY_QP: |
| return "DESTROY_QP"; |
| |
| case MLX5_CMD_OP_RST2INIT_QP: |
| return "RST2INIT_QP"; |
| |
| case MLX5_CMD_OP_INIT2RTR_QP: |
| return "INIT2RTR_QP"; |
| |
| case MLX5_CMD_OP_RTR2RTS_QP: |
| return "RTR2RTS_QP"; |
| |
| case MLX5_CMD_OP_RTS2RTS_QP: |
| return "RTS2RTS_QP"; |
| |
| case MLX5_CMD_OP_SQERR2RTS_QP: |
| return "SQERR2RTS_QP"; |
| |
| case MLX5_CMD_OP_2ERR_QP: |
| return "2ERR_QP"; |
| |
| case MLX5_CMD_OP_RTS2SQD_QP: |
| return "RTS2SQD_QP"; |
| |
| case MLX5_CMD_OP_SQD2RTS_QP: |
| return "SQD2RTS_QP"; |
| |
| case MLX5_CMD_OP_2RST_QP: |
| return "2RST_QP"; |
| |
| case MLX5_CMD_OP_QUERY_QP: |
| return "QUERY_QP"; |
| |
| case MLX5_CMD_OP_CONF_SQP: |
| return "CONF_SQP"; |
| |
| case MLX5_CMD_OP_MAD_IFC: |
| return "MAD_IFC"; |
| |
| case MLX5_CMD_OP_INIT2INIT_QP: |
| return "INIT2INIT_QP"; |
| |
| case MLX5_CMD_OP_SUSPEND_QP: |
| return "SUSPEND_QP"; |
| |
| case MLX5_CMD_OP_UNSUSPEND_QP: |
| return "UNSUSPEND_QP"; |
| |
| case MLX5_CMD_OP_SQD2SQD_QP: |
| return "SQD2SQD_QP"; |
| |
| case MLX5_CMD_OP_ALLOC_QP_COUNTER_SET: |
| return "ALLOC_QP_COUNTER_SET"; |
| |
| case MLX5_CMD_OP_DEALLOC_QP_COUNTER_SET: |
| return "DEALLOC_QP_COUNTER_SET"; |
| |
| case MLX5_CMD_OP_QUERY_QP_COUNTER_SET: |
| return "QUERY_QP_COUNTER_SET"; |
| |
| case MLX5_CMD_OP_CREATE_PSV: |
| return "CREATE_PSV"; |
| |
| case MLX5_CMD_OP_DESTROY_PSV: |
| return "DESTROY_PSV"; |
| |
| case MLX5_CMD_OP_QUERY_PSV: |
| return "QUERY_PSV"; |
| |
| case MLX5_CMD_OP_QUERY_SIG_RULE_TABLE: |
| return "QUERY_SIG_RULE_TABLE"; |
| |
| case MLX5_CMD_OP_QUERY_BLOCK_SIZE_TABLE: |
| return "QUERY_BLOCK_SIZE_TABLE"; |
| |
| case MLX5_CMD_OP_CREATE_SRQ: |
| return "CREATE_SRQ"; |
| |
| case MLX5_CMD_OP_DESTROY_SRQ: |
| return "DESTROY_SRQ"; |
| |
| case MLX5_CMD_OP_QUERY_SRQ: |
| return "QUERY_SRQ"; |
| |
| case MLX5_CMD_OP_ARM_RQ: |
| return "ARM_RQ"; |
| |
| case MLX5_CMD_OP_RESIZE_SRQ: |
| return "RESIZE_SRQ"; |
| |
| case MLX5_CMD_OP_ALLOC_PD: |
| return "ALLOC_PD"; |
| |
| case MLX5_CMD_OP_DEALLOC_PD: |
| return "DEALLOC_PD"; |
| |
| case MLX5_CMD_OP_ALLOC_UAR: |
| return "ALLOC_UAR"; |
| |
| case MLX5_CMD_OP_DEALLOC_UAR: |
| return "DEALLOC_UAR"; |
| |
| case MLX5_CMD_OP_ATTACH_TO_MCG: |
| return "ATTACH_TO_MCG"; |
| |
| case MLX5_CMD_OP_DETACH_FROM_MCG: |
| return "DETACH_FROM_MCG"; |
| |
| case MLX5_CMD_OP_ALLOC_XRCD: |
| return "ALLOC_XRCD"; |
| |
| case MLX5_CMD_OP_DEALLOC_XRCD: |
| return "DEALLOC_XRCD"; |
| |
| case MLX5_CMD_OP_ACCESS_REG: |
| return "MLX5_CMD_OP_ACCESS_REG"; |
| |
| default: return "unknown command opcode"; |
| } |
| } |
| |
| static void dump_command(struct mlx5_core_dev *dev, |
| struct mlx5_cmd_work_ent *ent, int input) |
| { |
| u16 op = be16_to_cpu(((struct mlx5_inbox_hdr *)(ent->lay->in))->opcode); |
| struct mlx5_cmd_msg *msg = input ? ent->in : ent->out; |
| struct mlx5_cmd_mailbox *next = msg->next; |
| int data_only; |
| int offset = 0; |
| int dump_len; |
| |
| data_only = !!(mlx5_core_debug_mask & (1 << MLX5_CMD_DATA)); |
| |
| if (data_only) |
| mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_DATA, |
| "dump command data %s(0x%x) %s\n", |
| mlx5_command_str(op), op, |
| input ? "INPUT" : "OUTPUT"); |
| else |
| mlx5_core_dbg(dev, "dump command %s(0x%x) %s\n", |
| mlx5_command_str(op), op, |
| input ? "INPUT" : "OUTPUT"); |
| |
| if (data_only) { |
| if (input) { |
| dump_buf(ent->lay->in, sizeof(ent->lay->in), 1, offset); |
| offset += sizeof(ent->lay->in); |
| } else { |
| dump_buf(ent->lay->out, sizeof(ent->lay->out), 1, offset); |
| offset += sizeof(ent->lay->out); |
| } |
| } else { |
| dump_buf(ent->lay, sizeof(*ent->lay), 0, offset); |
| offset += sizeof(*ent->lay); |
| } |
| |
| while (next && offset < msg->len) { |
| if (data_only) { |
| dump_len = min_t(int, MLX5_CMD_DATA_BLOCK_SIZE, msg->len - offset); |
| dump_buf(next->buf, dump_len, 1, offset); |
| offset += MLX5_CMD_DATA_BLOCK_SIZE; |
| } else { |
| mlx5_core_dbg(dev, "command block:\n"); |
| dump_buf(next->buf, sizeof(struct mlx5_cmd_prot_block), 0, offset); |
| offset += sizeof(struct mlx5_cmd_prot_block); |
| } |
| next = next->next; |
| } |
| |
| if (data_only) |
| pr_debug("\n"); |
| } |
| |
| static void cmd_work_handler(struct work_struct *work) |
| { |
| struct mlx5_cmd_work_ent *ent = container_of(work, struct mlx5_cmd_work_ent, work); |
| struct mlx5_cmd *cmd = ent->cmd; |
| struct mlx5_core_dev *dev = container_of(cmd, struct mlx5_core_dev, cmd); |
| struct mlx5_cmd_layout *lay; |
| struct semaphore *sem; |
| |
| sem = ent->page_queue ? &cmd->pages_sem : &cmd->sem; |
| down(sem); |
| if (!ent->page_queue) { |
| ent->idx = alloc_ent(cmd); |
| if (ent->idx < 0) { |
| mlx5_core_err(dev, "failed to allocate command entry\n"); |
| up(sem); |
| return; |
| } |
| } else { |
| ent->idx = cmd->max_reg_cmds; |
| } |
| |
| ent->token = alloc_token(cmd); |
| cmd->ent_arr[ent->idx] = ent; |
| lay = get_inst(cmd, ent->idx); |
| ent->lay = lay; |
| memset(lay, 0, sizeof(*lay)); |
| memcpy(lay->in, ent->in->first.data, sizeof(lay->in)); |
| if (ent->in->next) |
| lay->in_ptr = cpu_to_be64(ent->in->next->dma); |
| lay->inlen = cpu_to_be32(ent->in->len); |
| if (ent->out->next) |
| lay->out_ptr = cpu_to_be64(ent->out->next->dma); |
| lay->outlen = cpu_to_be32(ent->out->len); |
| lay->type = MLX5_PCI_CMD_XPORT; |
| lay->token = ent->token; |
| lay->status_own = CMD_OWNER_HW; |
| if (!cmd->checksum_disabled) |
| set_signature(ent); |
| dump_command(dev, ent, 1); |
| ktime_get_ts(&ent->ts1); |
| |
| /* ring doorbell after the descriptor is valid */ |
| wmb(); |
| iowrite32be(1 << ent->idx, &dev->iseg->cmd_dbell); |
| mlx5_core_dbg(dev, "write 0x%x to command doorbell\n", 1 << ent->idx); |
| mmiowb(); |
| if (cmd->mode == CMD_MODE_POLLING) { |
| poll_timeout(ent); |
| /* make sure we read the descriptor after ownership is SW */ |
| rmb(); |
| mlx5_cmd_comp_handler(dev, 1UL << ent->idx); |
| } |
| } |
| |
| static const char *deliv_status_to_str(u8 status) |
| { |
| switch (status) { |
| case MLX5_CMD_DELIVERY_STAT_OK: |
| return "no errors"; |
| case MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR: |
| return "signature error"; |
| case MLX5_CMD_DELIVERY_STAT_TOK_ERR: |
| return "token error"; |
| case MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR: |
| return "bad block number"; |
| case MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR: |
| return "output pointer not aligned to block size"; |
| case MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR: |
| return "input pointer not aligned to block size"; |
| case MLX5_CMD_DELIVERY_STAT_FW_ERR: |
| return "firmware internal error"; |
| case MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR: |
| return "command input length error"; |
| case MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR: |
| return "command ouput length error"; |
| case MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR: |
| return "reserved fields not cleared"; |
| case MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR: |
| return "bad command descriptor type"; |
| default: |
| return "unknown status code"; |
| } |
| } |
| |
| static u16 msg_to_opcode(struct mlx5_cmd_msg *in) |
| { |
| struct mlx5_inbox_hdr *hdr = (struct mlx5_inbox_hdr *)(in->first.data); |
| |
| return be16_to_cpu(hdr->opcode); |
| } |
| |
| static int wait_func(struct mlx5_core_dev *dev, struct mlx5_cmd_work_ent *ent) |
| { |
| unsigned long timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC); |
| struct mlx5_cmd *cmd = &dev->cmd; |
| int err; |
| |
| if (cmd->mode == CMD_MODE_POLLING) { |
| wait_for_completion(&ent->done); |
| err = ent->ret; |
| } else { |
| if (!wait_for_completion_timeout(&ent->done, timeout)) |
| err = -ETIMEDOUT; |
| else |
| err = 0; |
| } |
| if (err == -ETIMEDOUT) { |
| mlx5_core_warn(dev, "%s(0x%x) timeout. Will cause a leak of a command resource\n", |
| mlx5_command_str(msg_to_opcode(ent->in)), |
| msg_to_opcode(ent->in)); |
| } |
| mlx5_core_dbg(dev, "err %d, delivery status %s(%d)\n", err, |
| deliv_status_to_str(ent->status), ent->status); |
| |
| return err; |
| } |
| |
| /* Notes: |
| * 1. Callback functions may not sleep |
| * 2. page queue commands do not support asynchrous completion |
| */ |
| static int mlx5_cmd_invoke(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *in, |
| struct mlx5_cmd_msg *out, mlx5_cmd_cbk_t callback, |
| void *context, int page_queue, u8 *status) |
| { |
| struct mlx5_cmd *cmd = &dev->cmd; |
| struct mlx5_cmd_work_ent *ent; |
| ktime_t t1, t2, delta; |
| struct mlx5_cmd_stats *stats; |
| int err = 0; |
| s64 ds; |
| u16 op; |
| |
| if (callback && page_queue) |
| return -EINVAL; |
| |
| ent = alloc_cmd(cmd, in, out, callback, context, page_queue); |
| if (IS_ERR(ent)) |
| return PTR_ERR(ent); |
| |
| if (!callback) |
| init_completion(&ent->done); |
| |
| INIT_WORK(&ent->work, cmd_work_handler); |
| if (page_queue) { |
| cmd_work_handler(&ent->work); |
| } else if (!queue_work(cmd->wq, &ent->work)) { |
| mlx5_core_warn(dev, "failed to queue work\n"); |
| err = -ENOMEM; |
| goto out_free; |
| } |
| |
| if (!callback) { |
| err = wait_func(dev, ent); |
| if (err == -ETIMEDOUT) |
| goto out; |
| |
| t1 = timespec_to_ktime(ent->ts1); |
| t2 = timespec_to_ktime(ent->ts2); |
| delta = ktime_sub(t2, t1); |
| ds = ktime_to_ns(delta); |
| op = be16_to_cpu(((struct mlx5_inbox_hdr *)in->first.data)->opcode); |
| if (op < ARRAY_SIZE(cmd->stats)) { |
| stats = &cmd->stats[op]; |
| spin_lock(&stats->lock); |
| stats->sum += ds; |
| ++stats->n; |
| spin_unlock(&stats->lock); |
| } |
| mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_TIME, |
| "fw exec time for %s is %lld nsec\n", |
| mlx5_command_str(op), ds); |
| *status = ent->status; |
| free_cmd(ent); |
| } |
| |
| return err; |
| |
| out_free: |
| free_cmd(ent); |
| out: |
| return err; |
| } |
| |
| static ssize_t dbg_write(struct file *filp, const char __user *buf, |
| size_t count, loff_t *pos) |
| { |
| struct mlx5_core_dev *dev = filp->private_data; |
| struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| char lbuf[3]; |
| int err; |
| |
| if (!dbg->in_msg || !dbg->out_msg) |
| return -ENOMEM; |
| |
| if (copy_from_user(lbuf, buf, sizeof(lbuf))) |
| return -EFAULT; |
| |
| lbuf[sizeof(lbuf) - 1] = 0; |
| |
| if (strcmp(lbuf, "go")) |
| return -EINVAL; |
| |
| err = mlx5_cmd_exec(dev, dbg->in_msg, dbg->inlen, dbg->out_msg, dbg->outlen); |
| |
| return err ? err : count; |
| } |
| |
| |
| static const struct file_operations fops = { |
| .owner = THIS_MODULE, |
| .open = simple_open, |
| .write = dbg_write, |
| }; |
| |
| static int mlx5_copy_to_msg(struct mlx5_cmd_msg *to, void *from, int size) |
| { |
| struct mlx5_cmd_prot_block *block; |
| struct mlx5_cmd_mailbox *next; |
| int copy; |
| |
| if (!to || !from) |
| return -ENOMEM; |
| |
| copy = min_t(int, size, sizeof(to->first.data)); |
| memcpy(to->first.data, from, copy); |
| size -= copy; |
| from += copy; |
| |
| next = to->next; |
| while (size) { |
| if (!next) { |
| /* this is a BUG */ |
| return -ENOMEM; |
| } |
| |
| copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE); |
| block = next->buf; |
| memcpy(block->data, from, copy); |
| from += copy; |
| size -= copy; |
| next = next->next; |
| } |
| |
| return 0; |
| } |
| |
| static int mlx5_copy_from_msg(void *to, struct mlx5_cmd_msg *from, int size) |
| { |
| struct mlx5_cmd_prot_block *block; |
| struct mlx5_cmd_mailbox *next; |
| int copy; |
| |
| if (!to || !from) |
| return -ENOMEM; |
| |
| copy = min_t(int, size, sizeof(from->first.data)); |
| memcpy(to, from->first.data, copy); |
| size -= copy; |
| to += copy; |
| |
| next = from->next; |
| while (size) { |
| if (!next) { |
| /* this is a BUG */ |
| return -ENOMEM; |
| } |
| |
| copy = min_t(int, size, MLX5_CMD_DATA_BLOCK_SIZE); |
| block = next->buf; |
| if (xor8_buf(block, sizeof(*block)) != 0xff) |
| return -EINVAL; |
| |
| memcpy(to, block->data, copy); |
| to += copy; |
| size -= copy; |
| next = next->next; |
| } |
| |
| return 0; |
| } |
| |
| static struct mlx5_cmd_mailbox *alloc_cmd_box(struct mlx5_core_dev *dev, |
| gfp_t flags) |
| { |
| struct mlx5_cmd_mailbox *mailbox; |
| |
| mailbox = kmalloc(sizeof(*mailbox), flags); |
| if (!mailbox) |
| return ERR_PTR(-ENOMEM); |
| |
| mailbox->buf = pci_pool_alloc(dev->cmd.pool, flags, |
| &mailbox->dma); |
| if (!mailbox->buf) { |
| mlx5_core_dbg(dev, "failed allocation\n"); |
| kfree(mailbox); |
| return ERR_PTR(-ENOMEM); |
| } |
| memset(mailbox->buf, 0, sizeof(struct mlx5_cmd_prot_block)); |
| mailbox->next = NULL; |
| |
| return mailbox; |
| } |
| |
| static void free_cmd_box(struct mlx5_core_dev *dev, |
| struct mlx5_cmd_mailbox *mailbox) |
| { |
| pci_pool_free(dev->cmd.pool, mailbox->buf, mailbox->dma); |
| kfree(mailbox); |
| } |
| |
| static struct mlx5_cmd_msg *mlx5_alloc_cmd_msg(struct mlx5_core_dev *dev, |
| gfp_t flags, int size) |
| { |
| struct mlx5_cmd_mailbox *tmp, *head = NULL; |
| struct mlx5_cmd_prot_block *block; |
| struct mlx5_cmd_msg *msg; |
| int blen; |
| int err; |
| int n; |
| int i; |
| |
| msg = kzalloc(sizeof(*msg), GFP_KERNEL); |
| if (!msg) |
| return ERR_PTR(-ENOMEM); |
| |
| blen = size - min_t(int, sizeof(msg->first.data), size); |
| n = (blen + MLX5_CMD_DATA_BLOCK_SIZE - 1) / MLX5_CMD_DATA_BLOCK_SIZE; |
| |
| for (i = 0; i < n; i++) { |
| tmp = alloc_cmd_box(dev, flags); |
| if (IS_ERR(tmp)) { |
| mlx5_core_warn(dev, "failed allocating block\n"); |
| err = PTR_ERR(tmp); |
| goto err_alloc; |
| } |
| |
| block = tmp->buf; |
| tmp->next = head; |
| block->next = cpu_to_be64(tmp->next ? tmp->next->dma : 0); |
| block->block_num = cpu_to_be32(n - i - 1); |
| head = tmp; |
| } |
| msg->next = head; |
| msg->len = size; |
| return msg; |
| |
| err_alloc: |
| while (head) { |
| tmp = head->next; |
| free_cmd_box(dev, head); |
| head = tmp; |
| } |
| kfree(msg); |
| |
| return ERR_PTR(err); |
| } |
| |
| static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev, |
| struct mlx5_cmd_msg *msg) |
| { |
| struct mlx5_cmd_mailbox *head = msg->next; |
| struct mlx5_cmd_mailbox *next; |
| |
| while (head) { |
| next = head->next; |
| free_cmd_box(dev, head); |
| head = next; |
| } |
| kfree(msg); |
| } |
| |
| static ssize_t data_write(struct file *filp, const char __user *buf, |
| size_t count, loff_t *pos) |
| { |
| struct mlx5_core_dev *dev = filp->private_data; |
| struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| void *ptr; |
| int err; |
| |
| if (*pos != 0) |
| return -EINVAL; |
| |
| kfree(dbg->in_msg); |
| dbg->in_msg = NULL; |
| dbg->inlen = 0; |
| |
| ptr = kzalloc(count, GFP_KERNEL); |
| if (!ptr) |
| return -ENOMEM; |
| |
| if (copy_from_user(ptr, buf, count)) { |
| err = -EFAULT; |
| goto out; |
| } |
| dbg->in_msg = ptr; |
| dbg->inlen = count; |
| |
| *pos = count; |
| |
| return count; |
| |
| out: |
| kfree(ptr); |
| return err; |
| } |
| |
| static ssize_t data_read(struct file *filp, char __user *buf, size_t count, |
| loff_t *pos) |
| { |
| struct mlx5_core_dev *dev = filp->private_data; |
| struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| int copy; |
| |
| if (*pos) |
| return 0; |
| |
| if (!dbg->out_msg) |
| return -ENOMEM; |
| |
| copy = min_t(int, count, dbg->outlen); |
| if (copy_to_user(buf, dbg->out_msg, copy)) |
| return -EFAULT; |
| |
| *pos += copy; |
| |
| return copy; |
| } |
| |
| static const struct file_operations dfops = { |
| .owner = THIS_MODULE, |
| .open = simple_open, |
| .write = data_write, |
| .read = data_read, |
| }; |
| |
| static ssize_t outlen_read(struct file *filp, char __user *buf, size_t count, |
| loff_t *pos) |
| { |
| struct mlx5_core_dev *dev = filp->private_data; |
| struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| char outlen[8]; |
| int err; |
| |
| if (*pos) |
| return 0; |
| |
| err = snprintf(outlen, sizeof(outlen), "%d", dbg->outlen); |
| if (err < 0) |
| return err; |
| |
| if (copy_to_user(buf, &outlen, err)) |
| return -EFAULT; |
| |
| *pos += err; |
| |
| return err; |
| } |
| |
| static ssize_t outlen_write(struct file *filp, const char __user *buf, |
| size_t count, loff_t *pos) |
| { |
| struct mlx5_core_dev *dev = filp->private_data; |
| struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| char outlen_str[8]; |
| int outlen; |
| void *ptr; |
| int err; |
| |
| if (*pos != 0 || count > 6) |
| return -EINVAL; |
| |
| kfree(dbg->out_msg); |
| dbg->out_msg = NULL; |
| dbg->outlen = 0; |
| |
| if (copy_from_user(outlen_str, buf, count)) |
| return -EFAULT; |
| |
| outlen_str[7] = 0; |
| |
| err = sscanf(outlen_str, "%d", &outlen); |
| if (err < 0) |
| return err; |
| |
| ptr = kzalloc(outlen, GFP_KERNEL); |
| if (!ptr) |
| return -ENOMEM; |
| |
| dbg->out_msg = ptr; |
| dbg->outlen = outlen; |
| |
| *pos = count; |
| |
| return count; |
| } |
| |
| static const struct file_operations olfops = { |
| .owner = THIS_MODULE, |
| .open = simple_open, |
| .write = outlen_write, |
| .read = outlen_read, |
| }; |
| |
| static void set_wqname(struct mlx5_core_dev *dev) |
| { |
| struct mlx5_cmd *cmd = &dev->cmd; |
| |
| snprintf(cmd->wq_name, sizeof(cmd->wq_name), "mlx5_cmd_%s", |
| dev_name(&dev->pdev->dev)); |
| } |
| |
| static void clean_debug_files(struct mlx5_core_dev *dev) |
| { |
| struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| |
| if (!mlx5_debugfs_root) |
| return; |
| |
| mlx5_cmdif_debugfs_cleanup(dev); |
| debugfs_remove_recursive(dbg->dbg_root); |
| } |
| |
| static int create_debugfs_files(struct mlx5_core_dev *dev) |
| { |
| struct mlx5_cmd_debug *dbg = &dev->cmd.dbg; |
| int err = -ENOMEM; |
| |
| if (!mlx5_debugfs_root) |
| return 0; |
| |
| dbg->dbg_root = debugfs_create_dir("cmd", dev->priv.dbg_root); |
| if (!dbg->dbg_root) |
| return err; |
| |
| dbg->dbg_in = debugfs_create_file("in", 0400, dbg->dbg_root, |
| dev, &dfops); |
| if (!dbg->dbg_in) |
| goto err_dbg; |
| |
| dbg->dbg_out = debugfs_create_file("out", 0200, dbg->dbg_root, |
| dev, &dfops); |
| if (!dbg->dbg_out) |
| goto err_dbg; |
| |
| dbg->dbg_outlen = debugfs_create_file("out_len", 0600, dbg->dbg_root, |
| dev, &olfops); |
| if (!dbg->dbg_outlen) |
| goto err_dbg; |
| |
| dbg->dbg_status = debugfs_create_u8("status", 0600, dbg->dbg_root, |
| &dbg->status); |
| if (!dbg->dbg_status) |
| goto err_dbg; |
| |
| dbg->dbg_run = debugfs_create_file("run", 0200, dbg->dbg_root, dev, &fops); |
| if (!dbg->dbg_run) |
| goto err_dbg; |
| |
| mlx5_cmdif_debugfs_init(dev); |
| |
| return 0; |
| |
| err_dbg: |
| clean_debug_files(dev); |
| return err; |
| } |
| |
| void mlx5_cmd_use_events(struct mlx5_core_dev *dev) |
| { |
| struct mlx5_cmd *cmd = &dev->cmd; |
| int i; |
| |
| for (i = 0; i < cmd->max_reg_cmds; i++) |
| down(&cmd->sem); |
| |
| down(&cmd->pages_sem); |
| |
| flush_workqueue(cmd->wq); |
| |
| cmd->mode = CMD_MODE_EVENTS; |
| |
| up(&cmd->pages_sem); |
| for (i = 0; i < cmd->max_reg_cmds; i++) |
| up(&cmd->sem); |
| } |
| |
| void mlx5_cmd_use_polling(struct mlx5_core_dev *dev) |
| { |
| struct mlx5_cmd *cmd = &dev->cmd; |
| int i; |
| |
| for (i = 0; i < cmd->max_reg_cmds; i++) |
| down(&cmd->sem); |
| |
| down(&cmd->pages_sem); |
| |
| flush_workqueue(cmd->wq); |
| cmd->mode = CMD_MODE_POLLING; |
| |
| up(&cmd->pages_sem); |
| for (i = 0; i < cmd->max_reg_cmds; i++) |
| up(&cmd->sem); |
| } |
| |
| void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, unsigned long vector) |
| { |
| struct mlx5_cmd *cmd = &dev->cmd; |
| struct mlx5_cmd_work_ent *ent; |
| mlx5_cmd_cbk_t callback; |
| void *context; |
| int err; |
| int i; |
| |
| for (i = 0; i < (1 << cmd->log_sz); i++) { |
| if (test_bit(i, &vector)) { |
| ent = cmd->ent_arr[i]; |
| ktime_get_ts(&ent->ts2); |
| memcpy(ent->out->first.data, ent->lay->out, sizeof(ent->lay->out)); |
| dump_command(dev, ent, 0); |
| if (!ent->ret) { |
| if (!cmd->checksum_disabled) |
| ent->ret = verify_signature(ent); |
| else |
| ent->ret = 0; |
| ent->status = ent->lay->status_own >> 1; |
| mlx5_core_dbg(dev, "command completed. ret 0x%x, delivery status %s(0x%x)\n", |
| ent->ret, deliv_status_to_str(ent->status), ent->status); |
| } |
| free_ent(cmd, ent->idx); |
| if (ent->callback) { |
| callback = ent->callback; |
| context = ent->context; |
| err = ent->ret; |
| free_cmd(ent); |
| callback(err, context); |
| } else { |
| complete(&ent->done); |
| } |
| if (ent->page_queue) |
| up(&cmd->pages_sem); |
| else |
| up(&cmd->sem); |
| } |
| } |
| } |
| EXPORT_SYMBOL(mlx5_cmd_comp_handler); |
| |
| static int status_to_err(u8 status) |
| { |
| return status ? -1 : 0; /* TBD more meaningful codes */ |
| } |
| |
| static struct mlx5_cmd_msg *alloc_msg(struct mlx5_core_dev *dev, int in_size) |
| { |
| struct mlx5_cmd_msg *msg = ERR_PTR(-ENOMEM); |
| struct mlx5_cmd *cmd = &dev->cmd; |
| struct cache_ent *ent = NULL; |
| |
| if (in_size > MED_LIST_SIZE && in_size <= LONG_LIST_SIZE) |
| ent = &cmd->cache.large; |
| else if (in_size > 16 && in_size <= MED_LIST_SIZE) |
| ent = &cmd->cache.med; |
| |
| if (ent) { |
| spin_lock(&ent->lock); |
| if (!list_empty(&ent->head)) { |
| msg = list_entry(ent->head.next, typeof(*msg), list); |
| /* For cached lists, we must explicitly state what is |
| * the real size |
| */ |
| msg->len = in_size; |
| list_del(&msg->list); |
| } |
| spin_unlock(&ent->lock); |
| } |
| |
| if (IS_ERR(msg)) |
| msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, in_size); |
| |
| return msg; |
| } |
| |
| static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg) |
| { |
| if (msg->cache) { |
| spin_lock(&msg->cache->lock); |
| list_add_tail(&msg->list, &msg->cache->head); |
| spin_unlock(&msg->cache->lock); |
| } else { |
| mlx5_free_cmd_msg(dev, msg); |
| } |
| } |
| |
| static int is_manage_pages(struct mlx5_inbox_hdr *in) |
| { |
| return be16_to_cpu(in->opcode) == MLX5_CMD_OP_MANAGE_PAGES; |
| } |
| |
| int mlx5_cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out, |
| int out_size) |
| { |
| struct mlx5_cmd_msg *inb; |
| struct mlx5_cmd_msg *outb; |
| int pages_queue; |
| int err; |
| u8 status = 0; |
| |
| pages_queue = is_manage_pages(in); |
| |
| inb = alloc_msg(dev, in_size); |
| if (IS_ERR(inb)) { |
| err = PTR_ERR(inb); |
| return err; |
| } |
| |
| err = mlx5_copy_to_msg(inb, in, in_size); |
| if (err) { |
| mlx5_core_warn(dev, "err %d\n", err); |
| goto out_in; |
| } |
| |
| outb = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, out_size); |
| if (IS_ERR(outb)) { |
| err = PTR_ERR(outb); |
| goto out_in; |
| } |
| |
| err = mlx5_cmd_invoke(dev, inb, outb, NULL, NULL, pages_queue, &status); |
| if (err) |
| goto out_out; |
| |
| mlx5_core_dbg(dev, "err %d, status %d\n", err, status); |
| if (status) { |
| err = status_to_err(status); |
| goto out_out; |
| } |
| |
| err = mlx5_copy_from_msg(out, outb, out_size); |
| |
| out_out: |
| mlx5_free_cmd_msg(dev, outb); |
| |
| out_in: |
| free_msg(dev, inb); |
| return err; |
| } |
| EXPORT_SYMBOL(mlx5_cmd_exec); |
| |
| static void destroy_msg_cache(struct mlx5_core_dev *dev) |
| { |
| struct mlx5_cmd *cmd = &dev->cmd; |
| struct mlx5_cmd_msg *msg; |
| struct mlx5_cmd_msg *n; |
| |
| list_for_each_entry_safe(msg, n, &cmd->cache.large.head, list) { |
| list_del(&msg->list); |
| mlx5_free_cmd_msg(dev, msg); |
| } |
| |
| list_for_each_entry_safe(msg, n, &cmd->cache.med.head, list) { |
| list_del(&msg->list); |
| mlx5_free_cmd_msg(dev, msg); |
| } |
| } |
| |
| static int create_msg_cache(struct mlx5_core_dev *dev) |
| { |
| struct mlx5_cmd *cmd = &dev->cmd; |
| struct mlx5_cmd_msg *msg; |
| int err; |
| int i; |
| |
| spin_lock_init(&cmd->cache.large.lock); |
| INIT_LIST_HEAD(&cmd->cache.large.head); |
| spin_lock_init(&cmd->cache.med.lock); |
| INIT_LIST_HEAD(&cmd->cache.med.head); |
| |
| for (i = 0; i < NUM_LONG_LISTS; i++) { |
| msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, LONG_LIST_SIZE); |
| if (IS_ERR(msg)) { |
| err = PTR_ERR(msg); |
| goto ex_err; |
| } |
| msg->cache = &cmd->cache.large; |
| list_add_tail(&msg->list, &cmd->cache.large.head); |
| } |
| |
| for (i = 0; i < NUM_MED_LISTS; i++) { |
| msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL, MED_LIST_SIZE); |
| if (IS_ERR(msg)) { |
| err = PTR_ERR(msg); |
| goto ex_err; |
| } |
| msg->cache = &cmd->cache.med; |
| list_add_tail(&msg->list, &cmd->cache.med.head); |
| } |
| |
| return 0; |
| |
| ex_err: |
| destroy_msg_cache(dev); |
| return err; |
| } |
| |
| int mlx5_cmd_init(struct mlx5_core_dev *dev) |
| { |
| int size = sizeof(struct mlx5_cmd_prot_block); |
| int align = roundup_pow_of_two(size); |
| struct mlx5_cmd *cmd = &dev->cmd; |
| u32 cmd_h, cmd_l; |
| u16 cmd_if_rev; |
| int err; |
| int i; |
| |
| cmd_if_rev = cmdif_rev(dev); |
| if (cmd_if_rev != CMD_IF_REV) { |
| dev_err(&dev->pdev->dev, |
| "Driver cmdif rev(%d) differs from firmware's(%d)\n", |
| CMD_IF_REV, cmd_if_rev); |
| return -EINVAL; |
| } |
| |
| cmd->pool = pci_pool_create("mlx5_cmd", dev->pdev, size, align, 0); |
| if (!cmd->pool) |
| return -ENOMEM; |
| |
| cmd->cmd_buf = (void *)__get_free_pages(GFP_ATOMIC, 0); |
| if (!cmd->cmd_buf) { |
| err = -ENOMEM; |
| goto err_free_pool; |
| } |
| cmd->dma = dma_map_single(&dev->pdev->dev, cmd->cmd_buf, PAGE_SIZE, |
| DMA_BIDIRECTIONAL); |
| if (dma_mapping_error(&dev->pdev->dev, cmd->dma)) { |
| err = -ENOMEM; |
| goto err_free; |
| } |
| |
| cmd_l = ioread32be(&dev->iseg->cmdq_addr_l_sz) & 0xff; |
| cmd->log_sz = cmd_l >> 4 & 0xf; |
| cmd->log_stride = cmd_l & 0xf; |
| if (1 << cmd->log_sz > MLX5_MAX_COMMANDS) { |
| dev_err(&dev->pdev->dev, "firmware reports too many outstanding commands %d\n", |
| 1 << cmd->log_sz); |
| err = -EINVAL; |
| goto err_map; |
| } |
| |
| if (cmd->log_sz + cmd->log_stride > PAGE_SHIFT) { |
| dev_err(&dev->pdev->dev, "command queue size overflow\n"); |
| err = -EINVAL; |
| goto err_map; |
| } |
| |
| cmd->max_reg_cmds = (1 << cmd->log_sz) - 1; |
| cmd->bitmask = (1 << cmd->max_reg_cmds) - 1; |
| |
| cmd->cmdif_rev = ioread32be(&dev->iseg->cmdif_rev_fw_sub) >> 16; |
| if (cmd->cmdif_rev > CMD_IF_REV) { |
| dev_err(&dev->pdev->dev, "driver does not support command interface version. driver %d, firmware %d\n", |
| CMD_IF_REV, cmd->cmdif_rev); |
| err = -ENOTSUPP; |
| goto err_map; |
| } |
| |
| spin_lock_init(&cmd->alloc_lock); |
| spin_lock_init(&cmd->token_lock); |
| for (i = 0; i < ARRAY_SIZE(cmd->stats); i++) |
| spin_lock_init(&cmd->stats[i].lock); |
| |
| sema_init(&cmd->sem, cmd->max_reg_cmds); |
| sema_init(&cmd->pages_sem, 1); |
| |
| cmd_h = (u32)((u64)(cmd->dma) >> 32); |
| cmd_l = (u32)(cmd->dma); |
| if (cmd_l & 0xfff) { |
| dev_err(&dev->pdev->dev, "invalid command queue address\n"); |
| err = -ENOMEM; |
| goto err_map; |
| } |
| |
| iowrite32be(cmd_h, &dev->iseg->cmdq_addr_h); |
| iowrite32be(cmd_l, &dev->iseg->cmdq_addr_l_sz); |
| |
| /* Make sure firmware sees the complete address before we proceed */ |
| wmb(); |
| |
| mlx5_core_dbg(dev, "descriptor at dma 0x%llx\n", (unsigned long long)(cmd->dma)); |
| |
| cmd->mode = CMD_MODE_POLLING; |
| |
| err = create_msg_cache(dev); |
| if (err) { |
| dev_err(&dev->pdev->dev, "failed to create command cache\n"); |
| goto err_map; |
| } |
| |
| set_wqname(dev); |
| cmd->wq = create_singlethread_workqueue(cmd->wq_name); |
| if (!cmd->wq) { |
| dev_err(&dev->pdev->dev, "failed to create command workqueue\n"); |
| err = -ENOMEM; |
| goto err_cache; |
| } |
| |
| err = create_debugfs_files(dev); |
| if (err) { |
| err = -ENOMEM; |
| goto err_wq; |
| } |
| |
| return 0; |
| |
| err_wq: |
| destroy_workqueue(cmd->wq); |
| |
| err_cache: |
| destroy_msg_cache(dev); |
| |
| err_map: |
| dma_unmap_single(&dev->pdev->dev, cmd->dma, PAGE_SIZE, |
| DMA_BIDIRECTIONAL); |
| err_free: |
| free_pages((unsigned long)cmd->cmd_buf, 0); |
| |
| err_free_pool: |
| pci_pool_destroy(cmd->pool); |
| |
| return err; |
| } |
| EXPORT_SYMBOL(mlx5_cmd_init); |
| |
| void mlx5_cmd_cleanup(struct mlx5_core_dev *dev) |
| { |
| struct mlx5_cmd *cmd = &dev->cmd; |
| |
| clean_debug_files(dev); |
| destroy_workqueue(cmd->wq); |
| destroy_msg_cache(dev); |
| dma_unmap_single(&dev->pdev->dev, cmd->dma, PAGE_SIZE, |
| DMA_BIDIRECTIONAL); |
| free_pages((unsigned long)cmd->cmd_buf, 0); |
| pci_pool_destroy(cmd->pool); |
| } |
| EXPORT_SYMBOL(mlx5_cmd_cleanup); |
| |
| static const char *cmd_status_str(u8 status) |
| { |
| switch (status) { |
| case MLX5_CMD_STAT_OK: |
| return "OK"; |
| case MLX5_CMD_STAT_INT_ERR: |
| return "internal error"; |
| case MLX5_CMD_STAT_BAD_OP_ERR: |
| return "bad operation"; |
| case MLX5_CMD_STAT_BAD_PARAM_ERR: |
| return "bad parameter"; |
| case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: |
| return "bad system state"; |
| case MLX5_CMD_STAT_BAD_RES_ERR: |
| return "bad resource"; |
| case MLX5_CMD_STAT_RES_BUSY: |
| return "resource busy"; |
| case MLX5_CMD_STAT_LIM_ERR: |
| return "limits exceeded"; |
| case MLX5_CMD_STAT_BAD_RES_STATE_ERR: |
| return "bad resource state"; |
| case MLX5_CMD_STAT_IX_ERR: |
| return "bad index"; |
| case MLX5_CMD_STAT_NO_RES_ERR: |
| return "no resources"; |
| case MLX5_CMD_STAT_BAD_INP_LEN_ERR: |
| return "bad input length"; |
| case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: |
| return "bad output length"; |
| case MLX5_CMD_STAT_BAD_QP_STATE_ERR: |
| return "bad QP state"; |
| case MLX5_CMD_STAT_BAD_PKT_ERR: |
| return "bad packet (discarded)"; |
| case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: |
| return "bad size too many outstanding CQEs"; |
| default: |
| return "unknown status"; |
| } |
| } |
| |
| int mlx5_cmd_status_to_err(struct mlx5_outbox_hdr *hdr) |
| { |
| if (!hdr->status) |
| return 0; |
| |
| pr_warn("command failed, status %s(0x%x), syndrome 0x%x\n", |
| cmd_status_str(hdr->status), hdr->status, |
| be32_to_cpu(hdr->syndrome)); |
| |
| switch (hdr->status) { |
| case MLX5_CMD_STAT_OK: return 0; |
| case MLX5_CMD_STAT_INT_ERR: return -EIO; |
| case MLX5_CMD_STAT_BAD_OP_ERR: return -EINVAL; |
| case MLX5_CMD_STAT_BAD_PARAM_ERR: return -EINVAL; |
| case MLX5_CMD_STAT_BAD_SYS_STATE_ERR: return -EIO; |
| case MLX5_CMD_STAT_BAD_RES_ERR: return -EINVAL; |
| case MLX5_CMD_STAT_RES_BUSY: return -EBUSY; |
| case MLX5_CMD_STAT_LIM_ERR: return -EINVAL; |
| case MLX5_CMD_STAT_BAD_RES_STATE_ERR: return -EINVAL; |
| case MLX5_CMD_STAT_IX_ERR: return -EINVAL; |
| case MLX5_CMD_STAT_NO_RES_ERR: return -EAGAIN; |
| case MLX5_CMD_STAT_BAD_INP_LEN_ERR: return -EIO; |
| case MLX5_CMD_STAT_BAD_OUTP_LEN_ERR: return -EIO; |
| case MLX5_CMD_STAT_BAD_QP_STATE_ERR: return -EINVAL; |
| case MLX5_CMD_STAT_BAD_PKT_ERR: return -EINVAL; |
| case MLX5_CMD_STAT_BAD_SIZE_OUTS_CQES_ERR: return -EINVAL; |
| default: return -EIO; |
| } |
| } |