Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2312 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
new file mode 100644
index 000000000..55efb932a
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
@@ -0,0 +1,2312 @@
+/*
+ * Copyright (c) 2013-2016, Mellanox Technologies. 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 <linux/highmem.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/mlx5/driver.h>
+#include <linux/mlx5/eq.h>
+#include <linux/debugfs.h>
+
+#include "mlx5_core.h"
+#include "lib/eq.h"
+#include "lib/tout.h"
+#define CREATE_TRACE_POINTS
+#include "diag/cmd_tracepoint.h"
+
+struct mlx5_ifc_mbox_out_bits {
+	u8         status[0x8];
+	u8         reserved_at_8[0x18];
+
+	u8         syndrome[0x20];
+
+	u8         reserved_at_40[0x40];
+};
+
+struct mlx5_ifc_mbox_in_bits {
+	u8         opcode[0x10];
+	u8         uid[0x10];
+
+	u8         reserved_at_20[0x10];
+	u8         op_mod[0x10];
+
+	u8         reserved_at_40[0x40];
+};
+
+enum {
+	CMD_IF_REV = 5,
+};
+
+enum {
+	CMD_MODE_POLLING,
+	CMD_MODE_EVENTS
+};
+
+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,
+};
+
+static u16 in_to_opcode(void *in)
+{
+	return MLX5_GET(mbox_in, in, opcode);
+}
+
+/* Returns true for opcodes that might be triggered very frequently and throttle
+ * the command interface. Limit their command slots usage.
+ */
+static bool mlx5_cmd_is_throttle_opcode(u16 op)
+{
+	switch (op) {
+	case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
+	case MLX5_CMD_OP_DESTROY_GENERAL_OBJECT:
+	case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
+	case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
+	case MLX5_CMD_OP_SYNC_CRYPTO:
+		return true;
+	}
+	return false;
+}
+
+static struct mlx5_cmd_work_ent *
+cmd_alloc_ent(struct mlx5_cmd *cmd, struct mlx5_cmd_msg *in,
+	      struct mlx5_cmd_msg *out, void *uout, int uout_size,
+	      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->idx	= -EINVAL;
+	ent->in		= in;
+	ent->out	= out;
+	ent->uout	= uout;
+	ent->uout_size	= uout_size;
+	ent->callback	= cbk;
+	ent->context	= context;
+	ent->cmd	= cmd;
+	ent->page_queue = page_queue;
+	ent->op         = in_to_opcode(in->first.data);
+	refcount_set(&ent->refcnt, 1);
+
+	return ent;
+}
+
+static void cmd_free_ent(struct mlx5_cmd_work_ent *ent)
+{
+	kfree(ent);
+}
+
+static u8 alloc_token(struct mlx5_cmd *cmd)
+{
+	u8 token;
+
+	spin_lock(&cmd->token_lock);
+	cmd->token++;
+	if (cmd->token == 0)
+		cmd->token++;
+	token = cmd->token;
+	spin_unlock(&cmd->token_lock);
+
+	return token;
+}
+
+static int cmd_alloc_index(struct mlx5_cmd *cmd, struct mlx5_cmd_work_ent *ent)
+{
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&cmd->alloc_lock, flags);
+	ret = find_first_bit(&cmd->vars.bitmask, cmd->vars.max_reg_cmds);
+	if (ret < cmd->vars.max_reg_cmds) {
+		clear_bit(ret, &cmd->vars.bitmask);
+		ent->idx = ret;
+		cmd->ent_arr[ent->idx] = ent;
+	}
+	spin_unlock_irqrestore(&cmd->alloc_lock, flags);
+
+	return ret < cmd->vars.max_reg_cmds ? ret : -ENOMEM;
+}
+
+static void cmd_free_index(struct mlx5_cmd *cmd, int idx)
+{
+	lockdep_assert_held(&cmd->alloc_lock);
+	set_bit(idx, &cmd->vars.bitmask);
+}
+
+static void cmd_ent_get(struct mlx5_cmd_work_ent *ent)
+{
+	refcount_inc(&ent->refcnt);
+}
+
+static void cmd_ent_put(struct mlx5_cmd_work_ent *ent)
+{
+	struct mlx5_cmd *cmd = ent->cmd;
+	unsigned long flags;
+
+	spin_lock_irqsave(&cmd->alloc_lock, flags);
+	if (!refcount_dec_and_test(&ent->refcnt))
+		goto out;
+
+	if (ent->idx >= 0) {
+		cmd_free_index(cmd, ent->idx);
+		up(ent->page_queue ? &cmd->vars.pages_sem : &cmd->vars.sem);
+	}
+
+	cmd_free_ent(ent);
+out:
+	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->vars.log_stride);
+}
+
+static int mlx5_calc_cmd_blocks(struct mlx5_cmd_msg *msg)
+{
+	int size = msg->len;
+	int blen = size - min_t(int, sizeof(msg->first.data), size);
+
+	return DIV_ROUND_UP(blen, MLX5_CMD_DATA_BLOCK_SIZE);
+}
+
+static u8 xor8_buf(void *buf, size_t offset, int len)
+{
+	u8 *ptr = buf;
+	u8 sum = 0;
+	int i;
+	int end = len + offset;
+
+	for (i = offset; i < end; i++)
+		sum ^= ptr[i];
+
+	return sum;
+}
+
+static int verify_block_sig(struct mlx5_cmd_prot_block *block)
+{
+	size_t rsvd0_off = offsetof(struct mlx5_cmd_prot_block, rsvd0);
+	int xor_len = sizeof(*block) - sizeof(block->data) - 1;
+
+	if (xor8_buf(block, rsvd0_off, xor_len) != 0xff)
+		return -EHWPOISON;
+
+	if (xor8_buf(block, 0, sizeof(*block)) != 0xff)
+		return -EHWPOISON;
+
+	return 0;
+}
+
+static void calc_block_sig(struct mlx5_cmd_prot_block *block)
+{
+	int ctrl_xor_len = sizeof(*block) - sizeof(block->data) - 2;
+	size_t rsvd0_off = offsetof(struct mlx5_cmd_prot_block, rsvd0);
+
+	block->ctrl_sig = ~xor8_buf(block, rsvd0_off, ctrl_xor_len);
+	block->sig = ~xor8_buf(block, 0, sizeof(*block) - 1);
+}
+
+static void calc_chain_sig(struct mlx5_cmd_msg *msg)
+{
+	struct mlx5_cmd_mailbox *next = msg->next;
+	int n = mlx5_calc_cmd_blocks(msg);
+	int i = 0;
+
+	for (i = 0; i < n && next; i++)  {
+		calc_block_sig(next->buf);
+		next = next->next;
+	}
+}
+
+static void set_signature(struct mlx5_cmd_work_ent *ent, int csum)
+{
+	ent->lay->sig = ~xor8_buf(ent->lay, 0,  sizeof(*ent->lay));
+	if (csum) {
+		calc_chain_sig(ent->in);
+		calc_chain_sig(ent->out);
+	}
+}
+
+static void poll_timeout(struct mlx5_cmd_work_ent *ent)
+{
+	struct mlx5_core_dev *dev = container_of(ent->cmd, struct mlx5_core_dev, cmd);
+	u64 cmd_to_ms = mlx5_tout_ms(dev, CMD);
+	unsigned long poll_end;
+	u8 own;
+
+	poll_end = jiffies + msecs_to_jiffies(cmd_to_ms + 1000);
+
+	do {
+		own = READ_ONCE(ent->lay->status_own);
+		if (!(own & CMD_OWNER_HW)) {
+			ent->ret = 0;
+			return;
+		}
+		cond_resched();
+	} while (time_before(jiffies, poll_end));
+
+	ent->ret = -ETIMEDOUT;
+}
+
+static int verify_signature(struct mlx5_cmd_work_ent *ent)
+{
+	struct mlx5_cmd_mailbox *next = ent->out->next;
+	int n = mlx5_calc_cmd_blocks(ent->out);
+	int err;
+	u8 sig;
+	int i = 0;
+
+	sig = xor8_buf(ent->lay, 0, sizeof(*ent->lay));
+	if (sig != 0xff)
+		return -EHWPOISON;
+
+	for (i = 0; i < n && next; i++) {
+		err = verify_block_sig(next->buf);
+		if (err)
+			return -EHWPOISON;
+
+		next = next->next;
+	}
+
+	return 0;
+}
+
+static void dump_buf(void *buf, int size, int data_only, int offset, int idx)
+{
+	__be32 *p = buf;
+	int i;
+
+	for (i = 0; i < size; i += 16) {
+		pr_debug("cmd[%d]: %03x: %08x %08x %08x %08x\n", idx, 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");
+}
+
+static int mlx5_internal_err_ret_value(struct mlx5_core_dev *dev, u16 op,
+				       u32 *synd, u8 *status)
+{
+	*synd = 0;
+	*status = 0;
+
+	switch (op) {
+	case MLX5_CMD_OP_TEARDOWN_HCA:
+	case MLX5_CMD_OP_DISABLE_HCA:
+	case MLX5_CMD_OP_MANAGE_PAGES:
+	case MLX5_CMD_OP_DESTROY_MKEY:
+	case MLX5_CMD_OP_DESTROY_EQ:
+	case MLX5_CMD_OP_DESTROY_CQ:
+	case MLX5_CMD_OP_DESTROY_QP:
+	case MLX5_CMD_OP_DESTROY_PSV:
+	case MLX5_CMD_OP_DESTROY_SRQ:
+	case MLX5_CMD_OP_DESTROY_XRC_SRQ:
+	case MLX5_CMD_OP_DESTROY_XRQ:
+	case MLX5_CMD_OP_DESTROY_DCT:
+	case MLX5_CMD_OP_DEALLOC_Q_COUNTER:
+	case MLX5_CMD_OP_DESTROY_SCHEDULING_ELEMENT:
+	case MLX5_CMD_OP_DESTROY_QOS_PARA_VPORT:
+	case MLX5_CMD_OP_DEALLOC_PD:
+	case MLX5_CMD_OP_DEALLOC_UAR:
+	case MLX5_CMD_OP_DETACH_FROM_MCG:
+	case MLX5_CMD_OP_DEALLOC_XRCD:
+	case MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN:
+	case MLX5_CMD_OP_DELETE_VXLAN_UDP_DPORT:
+	case MLX5_CMD_OP_DELETE_L2_TABLE_ENTRY:
+	case MLX5_CMD_OP_DESTROY_LAG:
+	case MLX5_CMD_OP_DESTROY_VPORT_LAG:
+	case MLX5_CMD_OP_DESTROY_TIR:
+	case MLX5_CMD_OP_DESTROY_SQ:
+	case MLX5_CMD_OP_DESTROY_RQ:
+	case MLX5_CMD_OP_DESTROY_RMP:
+	case MLX5_CMD_OP_DESTROY_TIS:
+	case MLX5_CMD_OP_DESTROY_RQT:
+	case MLX5_CMD_OP_DESTROY_FLOW_TABLE:
+	case MLX5_CMD_OP_DESTROY_FLOW_GROUP:
+	case MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY:
+	case MLX5_CMD_OP_DEALLOC_FLOW_COUNTER:
+	case MLX5_CMD_OP_2ERR_QP:
+	case MLX5_CMD_OP_2RST_QP:
+	case MLX5_CMD_OP_MODIFY_NIC_VPORT_CONTEXT:
+	case MLX5_CMD_OP_MODIFY_FLOW_TABLE:
+	case MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY:
+	case MLX5_CMD_OP_SET_FLOW_TABLE_ROOT:
+	case MLX5_CMD_OP_DEALLOC_PACKET_REFORMAT_CONTEXT:
+	case MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT:
+	case MLX5_CMD_OP_FPGA_DESTROY_QP:
+	case MLX5_CMD_OP_DESTROY_GENERAL_OBJECT:
+	case MLX5_CMD_OP_DEALLOC_MEMIC:
+	case MLX5_CMD_OP_PAGE_FAULT_RESUME:
+	case MLX5_CMD_OP_QUERY_ESW_FUNCTIONS:
+	case MLX5_CMD_OP_DEALLOC_SF:
+	case MLX5_CMD_OP_DESTROY_UCTX:
+	case MLX5_CMD_OP_DESTROY_UMEM:
+	case MLX5_CMD_OP_MODIFY_RQT:
+		return MLX5_CMD_STAT_OK;
+
+	case MLX5_CMD_OP_QUERY_HCA_CAP:
+	case MLX5_CMD_OP_QUERY_ADAPTER:
+	case MLX5_CMD_OP_INIT_HCA:
+	case MLX5_CMD_OP_ENABLE_HCA:
+	case MLX5_CMD_OP_QUERY_PAGES:
+	case MLX5_CMD_OP_SET_HCA_CAP:
+	case MLX5_CMD_OP_QUERY_ISSI:
+	case MLX5_CMD_OP_SET_ISSI:
+	case MLX5_CMD_OP_CREATE_MKEY:
+	case MLX5_CMD_OP_QUERY_MKEY:
+	case MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS:
+	case MLX5_CMD_OP_CREATE_EQ:
+	case MLX5_CMD_OP_QUERY_EQ:
+	case MLX5_CMD_OP_GEN_EQE:
+	case MLX5_CMD_OP_CREATE_CQ:
+	case MLX5_CMD_OP_QUERY_CQ:
+	case MLX5_CMD_OP_MODIFY_CQ:
+	case MLX5_CMD_OP_CREATE_QP:
+	case MLX5_CMD_OP_RST2INIT_QP:
+	case MLX5_CMD_OP_INIT2RTR_QP:
+	case MLX5_CMD_OP_RTR2RTS_QP:
+	case MLX5_CMD_OP_RTS2RTS_QP:
+	case MLX5_CMD_OP_SQERR2RTS_QP:
+	case MLX5_CMD_OP_QUERY_QP:
+	case MLX5_CMD_OP_SQD_RTS_QP:
+	case MLX5_CMD_OP_INIT2INIT_QP:
+	case MLX5_CMD_OP_CREATE_PSV:
+	case MLX5_CMD_OP_CREATE_SRQ:
+	case MLX5_CMD_OP_QUERY_SRQ:
+	case MLX5_CMD_OP_ARM_RQ:
+	case MLX5_CMD_OP_CREATE_XRC_SRQ:
+	case MLX5_CMD_OP_QUERY_XRC_SRQ:
+	case MLX5_CMD_OP_ARM_XRC_SRQ:
+	case MLX5_CMD_OP_CREATE_XRQ:
+	case MLX5_CMD_OP_QUERY_XRQ:
+	case MLX5_CMD_OP_ARM_XRQ:
+	case MLX5_CMD_OP_CREATE_DCT:
+	case MLX5_CMD_OP_DRAIN_DCT:
+	case MLX5_CMD_OP_QUERY_DCT:
+	case MLX5_CMD_OP_ARM_DCT_FOR_KEY_VIOLATION:
+	case MLX5_CMD_OP_QUERY_VPORT_STATE:
+	case MLX5_CMD_OP_MODIFY_VPORT_STATE:
+	case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
+	case MLX5_CMD_OP_MODIFY_ESW_VPORT_CONTEXT:
+	case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT:
+	case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
+	case MLX5_CMD_OP_SET_ROCE_ADDRESS:
+	case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
+	case MLX5_CMD_OP_MODIFY_HCA_VPORT_CONTEXT:
+	case MLX5_CMD_OP_QUERY_HCA_VPORT_GID:
+	case MLX5_CMD_OP_QUERY_HCA_VPORT_PKEY:
+	case MLX5_CMD_OP_QUERY_VNIC_ENV:
+	case MLX5_CMD_OP_QUERY_VPORT_COUNTER:
+	case MLX5_CMD_OP_ALLOC_Q_COUNTER:
+	case MLX5_CMD_OP_QUERY_Q_COUNTER:
+	case MLX5_CMD_OP_SET_MONITOR_COUNTER:
+	case MLX5_CMD_OP_ARM_MONITOR_COUNTER:
+	case MLX5_CMD_OP_SET_PP_RATE_LIMIT:
+	case MLX5_CMD_OP_QUERY_RATE_LIMIT:
+	case MLX5_CMD_OP_CREATE_SCHEDULING_ELEMENT:
+	case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
+	case MLX5_CMD_OP_MODIFY_SCHEDULING_ELEMENT:
+	case MLX5_CMD_OP_CREATE_QOS_PARA_VPORT:
+	case MLX5_CMD_OP_ALLOC_PD:
+	case MLX5_CMD_OP_ALLOC_UAR:
+	case MLX5_CMD_OP_CONFIG_INT_MODERATION:
+	case MLX5_CMD_OP_ACCESS_REG:
+	case MLX5_CMD_OP_ATTACH_TO_MCG:
+	case MLX5_CMD_OP_GET_DROPPED_PACKET_LOG:
+	case MLX5_CMD_OP_MAD_IFC:
+	case MLX5_CMD_OP_QUERY_MAD_DEMUX:
+	case MLX5_CMD_OP_SET_MAD_DEMUX:
+	case MLX5_CMD_OP_NOP:
+	case MLX5_CMD_OP_ALLOC_XRCD:
+	case MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN:
+	case MLX5_CMD_OP_QUERY_CONG_STATUS:
+	case MLX5_CMD_OP_MODIFY_CONG_STATUS:
+	case MLX5_CMD_OP_QUERY_CONG_PARAMS:
+	case MLX5_CMD_OP_MODIFY_CONG_PARAMS:
+	case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
+	case MLX5_CMD_OP_ADD_VXLAN_UDP_DPORT:
+	case MLX5_CMD_OP_SET_L2_TABLE_ENTRY:
+	case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
+	case MLX5_CMD_OP_CREATE_LAG:
+	case MLX5_CMD_OP_MODIFY_LAG:
+	case MLX5_CMD_OP_QUERY_LAG:
+	case MLX5_CMD_OP_CREATE_VPORT_LAG:
+	case MLX5_CMD_OP_CREATE_TIR:
+	case MLX5_CMD_OP_MODIFY_TIR:
+	case MLX5_CMD_OP_QUERY_TIR:
+	case MLX5_CMD_OP_CREATE_SQ:
+	case MLX5_CMD_OP_MODIFY_SQ:
+	case MLX5_CMD_OP_QUERY_SQ:
+	case MLX5_CMD_OP_CREATE_RQ:
+	case MLX5_CMD_OP_MODIFY_RQ:
+	case MLX5_CMD_OP_QUERY_RQ:
+	case MLX5_CMD_OP_CREATE_RMP:
+	case MLX5_CMD_OP_MODIFY_RMP:
+	case MLX5_CMD_OP_QUERY_RMP:
+	case MLX5_CMD_OP_CREATE_TIS:
+	case MLX5_CMD_OP_MODIFY_TIS:
+	case MLX5_CMD_OP_QUERY_TIS:
+	case MLX5_CMD_OP_CREATE_RQT:
+	case MLX5_CMD_OP_QUERY_RQT:
+
+	case MLX5_CMD_OP_CREATE_FLOW_TABLE:
+	case MLX5_CMD_OP_QUERY_FLOW_TABLE:
+	case MLX5_CMD_OP_CREATE_FLOW_GROUP:
+	case MLX5_CMD_OP_QUERY_FLOW_GROUP:
+	case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
+	case MLX5_CMD_OP_ALLOC_FLOW_COUNTER:
+	case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
+	case MLX5_CMD_OP_ALLOC_PACKET_REFORMAT_CONTEXT:
+	case MLX5_CMD_OP_ALLOC_MODIFY_HEADER_CONTEXT:
+	case MLX5_CMD_OP_FPGA_CREATE_QP:
+	case MLX5_CMD_OP_FPGA_MODIFY_QP:
+	case MLX5_CMD_OP_FPGA_QUERY_QP:
+	case MLX5_CMD_OP_FPGA_QUERY_QP_COUNTERS:
+	case MLX5_CMD_OP_CREATE_GENERAL_OBJECT:
+	case MLX5_CMD_OP_MODIFY_GENERAL_OBJECT:
+	case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
+	case MLX5_CMD_OP_CREATE_UCTX:
+	case MLX5_CMD_OP_CREATE_UMEM:
+	case MLX5_CMD_OP_ALLOC_MEMIC:
+	case MLX5_CMD_OP_MODIFY_XRQ:
+	case MLX5_CMD_OP_RELEASE_XRQ_ERROR:
+	case MLX5_CMD_OP_QUERY_VHCA_STATE:
+	case MLX5_CMD_OP_MODIFY_VHCA_STATE:
+	case MLX5_CMD_OP_ALLOC_SF:
+	case MLX5_CMD_OP_SUSPEND_VHCA:
+	case MLX5_CMD_OP_RESUME_VHCA:
+	case MLX5_CMD_OP_QUERY_VHCA_MIGRATION_STATE:
+	case MLX5_CMD_OP_SAVE_VHCA_STATE:
+	case MLX5_CMD_OP_LOAD_VHCA_STATE:
+	case MLX5_CMD_OP_SYNC_CRYPTO:
+		*status = MLX5_DRIVER_STATUS_ABORTED;
+		*synd = MLX5_DRIVER_SYND;
+		return -ENOLINK;
+	default:
+		mlx5_core_err(dev, "Unknown FW command (%d)\n", op);
+		return -EINVAL;
+	}
+}
+
+const char *mlx5_command_str(int command)
+{
+#define MLX5_COMMAND_STR_CASE(__cmd) case MLX5_CMD_OP_ ## __cmd: return #__cmd
+
+	switch (command) {
+	MLX5_COMMAND_STR_CASE(QUERY_HCA_CAP);
+	MLX5_COMMAND_STR_CASE(QUERY_ADAPTER);
+	MLX5_COMMAND_STR_CASE(INIT_HCA);
+	MLX5_COMMAND_STR_CASE(TEARDOWN_HCA);
+	MLX5_COMMAND_STR_CASE(ENABLE_HCA);
+	MLX5_COMMAND_STR_CASE(DISABLE_HCA);
+	MLX5_COMMAND_STR_CASE(QUERY_PAGES);
+	MLX5_COMMAND_STR_CASE(MANAGE_PAGES);
+	MLX5_COMMAND_STR_CASE(SET_HCA_CAP);
+	MLX5_COMMAND_STR_CASE(QUERY_ISSI);
+	MLX5_COMMAND_STR_CASE(SET_ISSI);
+	MLX5_COMMAND_STR_CASE(SET_DRIVER_VERSION);
+	MLX5_COMMAND_STR_CASE(CREATE_MKEY);
+	MLX5_COMMAND_STR_CASE(QUERY_MKEY);
+	MLX5_COMMAND_STR_CASE(DESTROY_MKEY);
+	MLX5_COMMAND_STR_CASE(QUERY_SPECIAL_CONTEXTS);
+	MLX5_COMMAND_STR_CASE(PAGE_FAULT_RESUME);
+	MLX5_COMMAND_STR_CASE(CREATE_EQ);
+	MLX5_COMMAND_STR_CASE(DESTROY_EQ);
+	MLX5_COMMAND_STR_CASE(QUERY_EQ);
+	MLX5_COMMAND_STR_CASE(GEN_EQE);
+	MLX5_COMMAND_STR_CASE(CREATE_CQ);
+	MLX5_COMMAND_STR_CASE(DESTROY_CQ);
+	MLX5_COMMAND_STR_CASE(QUERY_CQ);
+	MLX5_COMMAND_STR_CASE(MODIFY_CQ);
+	MLX5_COMMAND_STR_CASE(CREATE_QP);
+	MLX5_COMMAND_STR_CASE(DESTROY_QP);
+	MLX5_COMMAND_STR_CASE(RST2INIT_QP);
+	MLX5_COMMAND_STR_CASE(INIT2RTR_QP);
+	MLX5_COMMAND_STR_CASE(RTR2RTS_QP);
+	MLX5_COMMAND_STR_CASE(RTS2RTS_QP);
+	MLX5_COMMAND_STR_CASE(SQERR2RTS_QP);
+	MLX5_COMMAND_STR_CASE(2ERR_QP);
+	MLX5_COMMAND_STR_CASE(2RST_QP);
+	MLX5_COMMAND_STR_CASE(QUERY_QP);
+	MLX5_COMMAND_STR_CASE(SQD_RTS_QP);
+	MLX5_COMMAND_STR_CASE(INIT2INIT_QP);
+	MLX5_COMMAND_STR_CASE(CREATE_PSV);
+	MLX5_COMMAND_STR_CASE(DESTROY_PSV);
+	MLX5_COMMAND_STR_CASE(CREATE_SRQ);
+	MLX5_COMMAND_STR_CASE(DESTROY_SRQ);
+	MLX5_COMMAND_STR_CASE(QUERY_SRQ);
+	MLX5_COMMAND_STR_CASE(ARM_RQ);
+	MLX5_COMMAND_STR_CASE(CREATE_XRC_SRQ);
+	MLX5_COMMAND_STR_CASE(DESTROY_XRC_SRQ);
+	MLX5_COMMAND_STR_CASE(QUERY_XRC_SRQ);
+	MLX5_COMMAND_STR_CASE(ARM_XRC_SRQ);
+	MLX5_COMMAND_STR_CASE(CREATE_DCT);
+	MLX5_COMMAND_STR_CASE(DESTROY_DCT);
+	MLX5_COMMAND_STR_CASE(DRAIN_DCT);
+	MLX5_COMMAND_STR_CASE(QUERY_DCT);
+	MLX5_COMMAND_STR_CASE(ARM_DCT_FOR_KEY_VIOLATION);
+	MLX5_COMMAND_STR_CASE(QUERY_VPORT_STATE);
+	MLX5_COMMAND_STR_CASE(MODIFY_VPORT_STATE);
+	MLX5_COMMAND_STR_CASE(QUERY_ESW_VPORT_CONTEXT);
+	MLX5_COMMAND_STR_CASE(MODIFY_ESW_VPORT_CONTEXT);
+	MLX5_COMMAND_STR_CASE(QUERY_NIC_VPORT_CONTEXT);
+	MLX5_COMMAND_STR_CASE(MODIFY_NIC_VPORT_CONTEXT);
+	MLX5_COMMAND_STR_CASE(QUERY_ROCE_ADDRESS);
+	MLX5_COMMAND_STR_CASE(SET_ROCE_ADDRESS);
+	MLX5_COMMAND_STR_CASE(QUERY_HCA_VPORT_CONTEXT);
+	MLX5_COMMAND_STR_CASE(MODIFY_HCA_VPORT_CONTEXT);
+	MLX5_COMMAND_STR_CASE(QUERY_HCA_VPORT_GID);
+	MLX5_COMMAND_STR_CASE(QUERY_HCA_VPORT_PKEY);
+	MLX5_COMMAND_STR_CASE(QUERY_VNIC_ENV);
+	MLX5_COMMAND_STR_CASE(QUERY_VPORT_COUNTER);
+	MLX5_COMMAND_STR_CASE(ALLOC_Q_COUNTER);
+	MLX5_COMMAND_STR_CASE(DEALLOC_Q_COUNTER);
+	MLX5_COMMAND_STR_CASE(QUERY_Q_COUNTER);
+	MLX5_COMMAND_STR_CASE(SET_MONITOR_COUNTER);
+	MLX5_COMMAND_STR_CASE(ARM_MONITOR_COUNTER);
+	MLX5_COMMAND_STR_CASE(SET_PP_RATE_LIMIT);
+	MLX5_COMMAND_STR_CASE(QUERY_RATE_LIMIT);
+	MLX5_COMMAND_STR_CASE(CREATE_SCHEDULING_ELEMENT);
+	MLX5_COMMAND_STR_CASE(DESTROY_SCHEDULING_ELEMENT);
+	MLX5_COMMAND_STR_CASE(QUERY_SCHEDULING_ELEMENT);
+	MLX5_COMMAND_STR_CASE(MODIFY_SCHEDULING_ELEMENT);
+	MLX5_COMMAND_STR_CASE(CREATE_QOS_PARA_VPORT);
+	MLX5_COMMAND_STR_CASE(DESTROY_QOS_PARA_VPORT);
+	MLX5_COMMAND_STR_CASE(ALLOC_PD);
+	MLX5_COMMAND_STR_CASE(DEALLOC_PD);
+	MLX5_COMMAND_STR_CASE(ALLOC_UAR);
+	MLX5_COMMAND_STR_CASE(DEALLOC_UAR);
+	MLX5_COMMAND_STR_CASE(CONFIG_INT_MODERATION);
+	MLX5_COMMAND_STR_CASE(ACCESS_REG);
+	MLX5_COMMAND_STR_CASE(ATTACH_TO_MCG);
+	MLX5_COMMAND_STR_CASE(DETACH_FROM_MCG);
+	MLX5_COMMAND_STR_CASE(GET_DROPPED_PACKET_LOG);
+	MLX5_COMMAND_STR_CASE(MAD_IFC);
+	MLX5_COMMAND_STR_CASE(QUERY_MAD_DEMUX);
+	MLX5_COMMAND_STR_CASE(SET_MAD_DEMUX);
+	MLX5_COMMAND_STR_CASE(NOP);
+	MLX5_COMMAND_STR_CASE(ALLOC_XRCD);
+	MLX5_COMMAND_STR_CASE(DEALLOC_XRCD);
+	MLX5_COMMAND_STR_CASE(ALLOC_TRANSPORT_DOMAIN);
+	MLX5_COMMAND_STR_CASE(DEALLOC_TRANSPORT_DOMAIN);
+	MLX5_COMMAND_STR_CASE(QUERY_CONG_STATUS);
+	MLX5_COMMAND_STR_CASE(MODIFY_CONG_STATUS);
+	MLX5_COMMAND_STR_CASE(QUERY_CONG_PARAMS);
+	MLX5_COMMAND_STR_CASE(MODIFY_CONG_PARAMS);
+	MLX5_COMMAND_STR_CASE(QUERY_CONG_STATISTICS);
+	MLX5_COMMAND_STR_CASE(ADD_VXLAN_UDP_DPORT);
+	MLX5_COMMAND_STR_CASE(DELETE_VXLAN_UDP_DPORT);
+	MLX5_COMMAND_STR_CASE(SET_L2_TABLE_ENTRY);
+	MLX5_COMMAND_STR_CASE(QUERY_L2_TABLE_ENTRY);
+	MLX5_COMMAND_STR_CASE(DELETE_L2_TABLE_ENTRY);
+	MLX5_COMMAND_STR_CASE(SET_WOL_ROL);
+	MLX5_COMMAND_STR_CASE(QUERY_WOL_ROL);
+	MLX5_COMMAND_STR_CASE(CREATE_LAG);
+	MLX5_COMMAND_STR_CASE(MODIFY_LAG);
+	MLX5_COMMAND_STR_CASE(QUERY_LAG);
+	MLX5_COMMAND_STR_CASE(DESTROY_LAG);
+	MLX5_COMMAND_STR_CASE(CREATE_VPORT_LAG);
+	MLX5_COMMAND_STR_CASE(DESTROY_VPORT_LAG);
+	MLX5_COMMAND_STR_CASE(CREATE_TIR);
+	MLX5_COMMAND_STR_CASE(MODIFY_TIR);
+	MLX5_COMMAND_STR_CASE(DESTROY_TIR);
+	MLX5_COMMAND_STR_CASE(QUERY_TIR);
+	MLX5_COMMAND_STR_CASE(CREATE_SQ);
+	MLX5_COMMAND_STR_CASE(MODIFY_SQ);
+	MLX5_COMMAND_STR_CASE(DESTROY_SQ);
+	MLX5_COMMAND_STR_CASE(QUERY_SQ);
+	MLX5_COMMAND_STR_CASE(CREATE_RQ);
+	MLX5_COMMAND_STR_CASE(MODIFY_RQ);
+	MLX5_COMMAND_STR_CASE(DESTROY_RQ);
+	MLX5_COMMAND_STR_CASE(QUERY_RQ);
+	MLX5_COMMAND_STR_CASE(CREATE_RMP);
+	MLX5_COMMAND_STR_CASE(MODIFY_RMP);
+	MLX5_COMMAND_STR_CASE(DESTROY_RMP);
+	MLX5_COMMAND_STR_CASE(QUERY_RMP);
+	MLX5_COMMAND_STR_CASE(CREATE_TIS);
+	MLX5_COMMAND_STR_CASE(MODIFY_TIS);
+	MLX5_COMMAND_STR_CASE(DESTROY_TIS);
+	MLX5_COMMAND_STR_CASE(QUERY_TIS);
+	MLX5_COMMAND_STR_CASE(CREATE_RQT);
+	MLX5_COMMAND_STR_CASE(MODIFY_RQT);
+	MLX5_COMMAND_STR_CASE(DESTROY_RQT);
+	MLX5_COMMAND_STR_CASE(QUERY_RQT);
+	MLX5_COMMAND_STR_CASE(SET_FLOW_TABLE_ROOT);
+	MLX5_COMMAND_STR_CASE(CREATE_FLOW_TABLE);
+	MLX5_COMMAND_STR_CASE(DESTROY_FLOW_TABLE);
+	MLX5_COMMAND_STR_CASE(QUERY_FLOW_TABLE);
+	MLX5_COMMAND_STR_CASE(CREATE_FLOW_GROUP);
+	MLX5_COMMAND_STR_CASE(DESTROY_FLOW_GROUP);
+	MLX5_COMMAND_STR_CASE(QUERY_FLOW_GROUP);
+	MLX5_COMMAND_STR_CASE(SET_FLOW_TABLE_ENTRY);
+	MLX5_COMMAND_STR_CASE(QUERY_FLOW_TABLE_ENTRY);
+	MLX5_COMMAND_STR_CASE(DELETE_FLOW_TABLE_ENTRY);
+	MLX5_COMMAND_STR_CASE(ALLOC_FLOW_COUNTER);
+	MLX5_COMMAND_STR_CASE(DEALLOC_FLOW_COUNTER);
+	MLX5_COMMAND_STR_CASE(QUERY_FLOW_COUNTER);
+	MLX5_COMMAND_STR_CASE(MODIFY_FLOW_TABLE);
+	MLX5_COMMAND_STR_CASE(ALLOC_PACKET_REFORMAT_CONTEXT);
+	MLX5_COMMAND_STR_CASE(DEALLOC_PACKET_REFORMAT_CONTEXT);
+	MLX5_COMMAND_STR_CASE(ALLOC_MODIFY_HEADER_CONTEXT);
+	MLX5_COMMAND_STR_CASE(DEALLOC_MODIFY_HEADER_CONTEXT);
+	MLX5_COMMAND_STR_CASE(FPGA_CREATE_QP);
+	MLX5_COMMAND_STR_CASE(FPGA_MODIFY_QP);
+	MLX5_COMMAND_STR_CASE(FPGA_QUERY_QP);
+	MLX5_COMMAND_STR_CASE(FPGA_QUERY_QP_COUNTERS);
+	MLX5_COMMAND_STR_CASE(FPGA_DESTROY_QP);
+	MLX5_COMMAND_STR_CASE(CREATE_XRQ);
+	MLX5_COMMAND_STR_CASE(DESTROY_XRQ);
+	MLX5_COMMAND_STR_CASE(QUERY_XRQ);
+	MLX5_COMMAND_STR_CASE(ARM_XRQ);
+	MLX5_COMMAND_STR_CASE(CREATE_GENERAL_OBJECT);
+	MLX5_COMMAND_STR_CASE(DESTROY_GENERAL_OBJECT);
+	MLX5_COMMAND_STR_CASE(MODIFY_GENERAL_OBJECT);
+	MLX5_COMMAND_STR_CASE(QUERY_GENERAL_OBJECT);
+	MLX5_COMMAND_STR_CASE(QUERY_MODIFY_HEADER_CONTEXT);
+	MLX5_COMMAND_STR_CASE(ALLOC_MEMIC);
+	MLX5_COMMAND_STR_CASE(DEALLOC_MEMIC);
+	MLX5_COMMAND_STR_CASE(QUERY_ESW_FUNCTIONS);
+	MLX5_COMMAND_STR_CASE(CREATE_UCTX);
+	MLX5_COMMAND_STR_CASE(DESTROY_UCTX);
+	MLX5_COMMAND_STR_CASE(CREATE_UMEM);
+	MLX5_COMMAND_STR_CASE(DESTROY_UMEM);
+	MLX5_COMMAND_STR_CASE(RELEASE_XRQ_ERROR);
+	MLX5_COMMAND_STR_CASE(MODIFY_XRQ);
+	MLX5_COMMAND_STR_CASE(QUERY_VHCA_STATE);
+	MLX5_COMMAND_STR_CASE(MODIFY_VHCA_STATE);
+	MLX5_COMMAND_STR_CASE(ALLOC_SF);
+	MLX5_COMMAND_STR_CASE(DEALLOC_SF);
+	MLX5_COMMAND_STR_CASE(SUSPEND_VHCA);
+	MLX5_COMMAND_STR_CASE(RESUME_VHCA);
+	MLX5_COMMAND_STR_CASE(QUERY_VHCA_MIGRATION_STATE);
+	MLX5_COMMAND_STR_CASE(SAVE_VHCA_STATE);
+	MLX5_COMMAND_STR_CASE(LOAD_VHCA_STATE);
+	MLX5_COMMAND_STR_CASE(SYNC_CRYPTO);
+	default: return "unknown command opcode";
+	}
+}
+
+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";
+	}
+}
+
+static int cmd_status_to_err(u8 status)
+{
+	switch (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 -ENOMEM;
+	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;
+	}
+}
+
+void mlx5_cmd_out_err(struct mlx5_core_dev *dev, u16 opcode, u16 op_mod, void *out)
+{
+	u32 syndrome = MLX5_GET(mbox_out, out, syndrome);
+	u8 status = MLX5_GET(mbox_out, out, status);
+
+	mlx5_core_err_rl(dev,
+			 "%s(0x%x) op_mod(0x%x) failed, status %s(0x%x), syndrome (0x%x), err(%d)\n",
+			 mlx5_command_str(opcode), opcode, op_mod,
+			 cmd_status_str(status), status, syndrome, cmd_status_to_err(status));
+}
+EXPORT_SYMBOL(mlx5_cmd_out_err);
+
+static void cmd_status_print(struct mlx5_core_dev *dev, void *in, void *out)
+{
+	u16 opcode, op_mod;
+	u16 uid;
+
+	opcode = in_to_opcode(in);
+	op_mod = MLX5_GET(mbox_in, in, op_mod);
+	uid    = MLX5_GET(mbox_in, in, uid);
+
+	if (!uid && opcode != MLX5_CMD_OP_DESTROY_MKEY &&
+	    opcode != MLX5_CMD_OP_CREATE_UCTX)
+		mlx5_cmd_out_err(dev, opcode, op_mod, out);
+}
+
+int mlx5_cmd_check(struct mlx5_core_dev *dev, int err, void *in, void *out)
+{
+	/* aborted due to PCI error or via reset flow mlx5_cmd_trigger_completions() */
+	if (err == -ENXIO) {
+		u16 opcode = in_to_opcode(in);
+		u32 syndrome;
+		u8 status;
+
+		/* PCI Error, emulate command return status, for smooth reset */
+		err = mlx5_internal_err_ret_value(dev, opcode, &syndrome, &status);
+		MLX5_SET(mbox_out, out, status, status);
+		MLX5_SET(mbox_out, out, syndrome, syndrome);
+		if (!err)
+			return 0;
+	}
+
+	/* driver or FW delivery error */
+	if (err != -EREMOTEIO && err)
+		return err;
+
+	/* check outbox status */
+	err = cmd_status_to_err(MLX5_GET(mbox_out, out, status));
+	if (err)
+		cmd_status_print(dev, in, out);
+
+	return err;
+}
+EXPORT_SYMBOL(mlx5_cmd_check);
+
+static void dump_command(struct mlx5_core_dev *dev,
+			 struct mlx5_cmd_work_ent *ent, int input)
+{
+	struct mlx5_cmd_msg *msg = input ? ent->in : ent->out;
+	struct mlx5_cmd_mailbox *next = msg->next;
+	int n = mlx5_calc_cmd_blocks(msg);
+	u16 op = ent->op;
+	int data_only;
+	u32 offset = 0;
+	int dump_len;
+	int i;
+
+	mlx5_core_dbg(dev, "cmd[%d]: start dump\n", ent->idx);
+	data_only = !!(mlx5_core_debug_mask & (1 << MLX5_CMD_DATA));
+
+	if (data_only)
+		mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_DATA,
+				   "cmd[%d]: dump command data %s(0x%x) %s\n",
+				   ent->idx, mlx5_command_str(op), op,
+				   input ? "INPUT" : "OUTPUT");
+	else
+		mlx5_core_dbg(dev, "cmd[%d]: dump command %s(0x%x) %s\n",
+			      ent->idx, mlx5_command_str(op), op,
+			      input ? "INPUT" : "OUTPUT");
+
+	if (data_only) {
+		if (input) {
+			dump_buf(ent->lay->in, sizeof(ent->lay->in), 1, offset, ent->idx);
+			offset += sizeof(ent->lay->in);
+		} else {
+			dump_buf(ent->lay->out, sizeof(ent->lay->out), 1, offset, ent->idx);
+			offset += sizeof(ent->lay->out);
+		}
+	} else {
+		dump_buf(ent->lay, sizeof(*ent->lay), 0, offset, ent->idx);
+		offset += sizeof(*ent->lay);
+	}
+
+	for (i = 0; i < n && next; i++)  {
+		if (data_only) {
+			dump_len = min_t(int, MLX5_CMD_DATA_BLOCK_SIZE, msg->len - offset);
+			dump_buf(next->buf, dump_len, 1, offset, ent->idx);
+			offset += MLX5_CMD_DATA_BLOCK_SIZE;
+		} else {
+			mlx5_core_dbg(dev, "cmd[%d]: command block:\n", ent->idx);
+			dump_buf(next->buf, sizeof(struct mlx5_cmd_prot_block), 0, offset,
+				 ent->idx);
+			offset += sizeof(struct mlx5_cmd_prot_block);
+		}
+		next = next->next;
+	}
+
+	if (data_only)
+		pr_debug("\n");
+
+	mlx5_core_dbg(dev, "cmd[%d]: end dump\n", ent->idx);
+}
+
+static void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vec, bool forced);
+
+static void cb_timeout_handler(struct work_struct *work)
+{
+	struct delayed_work *dwork = container_of(work, struct delayed_work,
+						  work);
+	struct mlx5_cmd_work_ent *ent = container_of(dwork,
+						     struct mlx5_cmd_work_ent,
+						     cb_timeout_work);
+	struct mlx5_core_dev *dev = container_of(ent->cmd, struct mlx5_core_dev,
+						 cmd);
+
+	mlx5_cmd_eq_recover(dev);
+
+	/* Maybe got handled by eq recover ? */
+	if (!test_bit(MLX5_CMD_ENT_STATE_PENDING_COMP, &ent->state)) {
+		mlx5_core_warn(dev, "cmd[%d]: %s(0x%x) Async, recovered after timeout\n", ent->idx,
+			       mlx5_command_str(ent->op), ent->op);
+		goto out; /* phew, already handled */
+	}
+
+	ent->ret = -ETIMEDOUT;
+	mlx5_core_warn(dev, "cmd[%d]: %s(0x%x) Async, timeout. Will cause a leak of a command resource\n",
+		       ent->idx, mlx5_command_str(ent->op), ent->op);
+	mlx5_cmd_comp_handler(dev, 1ULL << ent->idx, true);
+
+out:
+	cmd_ent_put(ent); /* for the cmd_ent_get() took on schedule delayed work */
+}
+
+static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg);
+static void mlx5_free_cmd_msg(struct mlx5_core_dev *dev,
+			      struct mlx5_cmd_msg *msg);
+
+static bool opcode_allowed(struct mlx5_cmd *cmd, u16 opcode)
+{
+	if (cmd->allowed_opcode == CMD_ALLOWED_OPCODE_ALL)
+		return true;
+
+	return cmd->allowed_opcode == opcode;
+}
+
+bool mlx5_cmd_is_down(struct mlx5_core_dev *dev)
+{
+	return pci_channel_offline(dev->pdev) ||
+	       dev->cmd.state != MLX5_CMDIF_STATE_UP ||
+	       dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR;
+}
+
+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;
+	bool poll_cmd = ent->polling;
+	struct mlx5_cmd_layout *lay;
+	struct mlx5_core_dev *dev;
+	unsigned long cb_timeout;
+	struct semaphore *sem;
+	unsigned long flags;
+	int alloc_ret;
+	int cmd_mode;
+
+	dev = container_of(cmd, struct mlx5_core_dev, cmd);
+	cb_timeout = msecs_to_jiffies(mlx5_tout_ms(dev, CMD));
+
+	complete(&ent->handling);
+	sem = ent->page_queue ? &cmd->vars.pages_sem : &cmd->vars.sem;
+	down(sem);
+	if (!ent->page_queue) {
+		alloc_ret = cmd_alloc_index(cmd, ent);
+		if (alloc_ret < 0) {
+			mlx5_core_err_rl(dev, "failed to allocate command entry\n");
+			if (ent->callback) {
+				ent->callback(-EAGAIN, ent->context);
+				mlx5_free_cmd_msg(dev, ent->out);
+				free_msg(dev, ent->in);
+				cmd_ent_put(ent);
+			} else {
+				ent->ret = -EAGAIN;
+				complete(&ent->done);
+			}
+			up(sem);
+			return;
+		}
+	} else {
+		ent->idx = cmd->vars.max_reg_cmds;
+		spin_lock_irqsave(&cmd->alloc_lock, flags);
+		clear_bit(ent->idx, &cmd->vars.bitmask);
+		cmd->ent_arr[ent->idx] = ent;
+		spin_unlock_irqrestore(&cmd->alloc_lock, flags);
+	}
+
+	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;
+	set_signature(ent, !cmd->checksum_disabled);
+	dump_command(dev, ent, 1);
+	ent->ts1 = ktime_get_ns();
+	cmd_mode = cmd->mode;
+
+	if (ent->callback && schedule_delayed_work(&ent->cb_timeout_work, cb_timeout))
+		cmd_ent_get(ent);
+	set_bit(MLX5_CMD_ENT_STATE_PENDING_COMP, &ent->state);
+
+	cmd_ent_get(ent); /* for the _real_ FW event on completion */
+	/* Skip sending command to fw if internal error */
+	if (mlx5_cmd_is_down(dev) || !opcode_allowed(&dev->cmd, ent->op)) {
+		ent->ret = -ENXIO;
+		mlx5_cmd_comp_handler(dev, 1ULL << ent->idx, true);
+		return;
+	}
+
+	/* ring doorbell after the descriptor is valid */
+	mlx5_core_dbg(dev, "writing 0x%x to command doorbell\n", 1 << ent->idx);
+	wmb();
+	iowrite32be(1 << ent->idx, &dev->iseg->cmd_dbell);
+	/* if not in polling don't use ent after this point */
+	if (cmd_mode == CMD_MODE_POLLING || poll_cmd) {
+		poll_timeout(ent);
+		/* make sure we read the descriptor after ownership is SW */
+		rmb();
+		mlx5_cmd_comp_handler(dev, 1ULL << ent->idx, (ent->ret == -ETIMEDOUT));
+	}
+}
+
+static int deliv_status_to_err(u8 status)
+{
+	switch (status) {
+	case MLX5_CMD_DELIVERY_STAT_OK:
+	case MLX5_DRIVER_STATUS_ABORTED:
+		return 0;
+	case MLX5_CMD_DELIVERY_STAT_SIGNAT_ERR:
+	case MLX5_CMD_DELIVERY_STAT_TOK_ERR:
+		return -EBADR;
+	case MLX5_CMD_DELIVERY_STAT_BAD_BLK_NUM_ERR:
+	case MLX5_CMD_DELIVERY_STAT_OUT_PTR_ALIGN_ERR:
+	case MLX5_CMD_DELIVERY_STAT_IN_PTR_ALIGN_ERR:
+		return -EFAULT; /* Bad address */
+	case MLX5_CMD_DELIVERY_STAT_IN_LENGTH_ERR:
+	case MLX5_CMD_DELIVERY_STAT_OUT_LENGTH_ERR:
+	case MLX5_CMD_DELIVERY_STAT_CMD_DESCR_ERR:
+	case MLX5_CMD_DELIVERY_STAT_RES_FLD_NOT_CLR_ERR:
+		return -ENOMSG;
+	case MLX5_CMD_DELIVERY_STAT_FW_ERR:
+		return -EIO;
+	default:
+		return -EINVAL;
+	}
+}
+
+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 output 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";
+	}
+}
+
+enum {
+	MLX5_CMD_TIMEOUT_RECOVER_MSEC   = 5 * 1000,
+};
+
+static void wait_func_handle_exec_timeout(struct mlx5_core_dev *dev,
+					  struct mlx5_cmd_work_ent *ent)
+{
+	unsigned long timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_RECOVER_MSEC);
+
+	mlx5_cmd_eq_recover(dev);
+
+	/* Re-wait on the ent->done after executing the recovery flow. If the
+	 * recovery flow (or any other recovery flow running simultaneously)
+	 * has recovered an EQE, it should cause the entry to be completed by
+	 * the command interface.
+	 */
+	if (wait_for_completion_timeout(&ent->done, timeout)) {
+		mlx5_core_warn(dev, "cmd[%d]: %s(0x%x) recovered after timeout\n", ent->idx,
+			       mlx5_command_str(ent->op), ent->op);
+		return;
+	}
+
+	mlx5_core_warn(dev, "cmd[%d]: %s(0x%x) No done completion\n", ent->idx,
+		       mlx5_command_str(ent->op), ent->op);
+
+	ent->ret = -ETIMEDOUT;
+	mlx5_cmd_comp_handler(dev, 1ULL << ent->idx, true);
+}
+
+static int wait_func(struct mlx5_core_dev *dev, struct mlx5_cmd_work_ent *ent)
+{
+	unsigned long timeout = msecs_to_jiffies(mlx5_tout_ms(dev, CMD));
+	struct mlx5_cmd *cmd = &dev->cmd;
+	int err;
+
+	if (!wait_for_completion_timeout(&ent->handling, timeout) &&
+	    cancel_work_sync(&ent->work)) {
+		ent->ret = -ECANCELED;
+		goto out_err;
+	}
+	if (cmd->mode == CMD_MODE_POLLING || ent->polling)
+		wait_for_completion(&ent->done);
+	else if (!wait_for_completion_timeout(&ent->done, timeout))
+		wait_func_handle_exec_timeout(dev, ent);
+
+out_err:
+	err = ent->ret;
+
+	if (err == -ETIMEDOUT) {
+		mlx5_core_warn(dev, "%s(0x%x) timeout. Will cause a leak of a command resource\n",
+			       mlx5_command_str(ent->op), ent->op);
+	} else if (err == -ECANCELED) {
+		mlx5_core_warn(dev, "%s(0x%x) canceled on out of queue timeout.\n",
+			       mlx5_command_str(ent->op), ent->op);
+	}
+	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
+ *
+ * return value in case (!callback):
+ *	ret < 0 : Command execution couldn't be submitted by driver
+ *	ret > 0 : Command execution couldn't be performed by firmware
+ *	ret == 0: Command was executed by FW, Caller must check FW outbox status.
+ *
+ * return value in case (callback):
+ *	ret < 0 : Command execution couldn't be submitted by driver
+ *	ret == 0: Command will be submitted to FW for execution
+ *		  and the callback will be called for further status updates
+ */
+static int mlx5_cmd_invoke(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *in,
+			   struct mlx5_cmd_msg *out, void *uout, int uout_size,
+			   mlx5_cmd_cbk_t callback,
+			   void *context, int page_queue,
+			   u8 token, bool force_polling)
+{
+	struct mlx5_cmd *cmd = &dev->cmd;
+	struct mlx5_cmd_work_ent *ent;
+	struct mlx5_cmd_stats *stats;
+	u8 status = 0;
+	int err = 0;
+	s64 ds;
+
+	if (callback && page_queue)
+		return -EINVAL;
+
+	ent = cmd_alloc_ent(cmd, in, out, uout, uout_size,
+			    callback, context, page_queue);
+	if (IS_ERR(ent))
+		return PTR_ERR(ent);
+
+	/* put for this ent is when consumed, depending on the use case
+	 * 1) (!callback) blocking flow: by caller after wait_func completes
+	 * 2) (callback) flow: by mlx5_cmd_comp_handler() when ent is handled
+	 */
+
+	ent->token = token;
+	ent->polling = force_polling;
+
+	init_completion(&ent->handling);
+	if (!callback)
+		init_completion(&ent->done);
+
+	INIT_DELAYED_WORK(&ent->cb_timeout_work, cb_timeout_handler);
+	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 = -EALREADY;
+		goto out_free;
+	}
+
+	if (callback)
+		return 0; /* mlx5_cmd_comp_handler() will put(ent) */
+
+	err = wait_func(dev, ent);
+	if (err == -ETIMEDOUT || err == -ECANCELED)
+		goto out_free;
+
+	ds = ent->ts2 - ent->ts1;
+	stats = xa_load(&cmd->stats, ent->op);
+	if (stats) {
+		spin_lock_irq(&stats->lock);
+		stats->sum += ds;
+		++stats->n;
+		spin_unlock_irq(&stats->lock);
+	}
+	mlx5_core_dbg_mask(dev, 1 << MLX5_CMD_TIME,
+			   "fw exec time for %s is %lld nsec\n",
+			   mlx5_command_str(ent->op), ds);
+
+out_free:
+	status = ent->status;
+	cmd_ent_put(ent);
+	return err ? : status;
+}
+
+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 (count < sizeof(lbuf) - 1)
+		return -EINVAL;
+
+	if (copy_from_user(lbuf, buf, sizeof(lbuf) - 1))
+		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,
+			    u8 token)
+{
+	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;
+		block->token = token;
+		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;
+
+		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 = dma_pool_zalloc(dev->cmd.pool, flags,
+				       &mailbox->dma);
+	if (!mailbox->buf) {
+		mlx5_core_dbg(dev, "failed allocation\n");
+		kfree(mailbox);
+		return ERR_PTR(-ENOMEM);
+	}
+	mailbox->next = NULL;
+
+	return mailbox;
+}
+
+static void free_cmd_box(struct mlx5_core_dev *dev,
+			 struct mlx5_cmd_mailbox *mailbox)
+{
+	dma_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,
+					       u8 token)
+{
+	struct mlx5_cmd_mailbox *tmp, *head = NULL;
+	struct mlx5_cmd_prot_block *block;
+	struct mlx5_cmd_msg *msg;
+	int err;
+	int n;
+	int i;
+
+	msg = kzalloc(sizeof(*msg), flags);
+	if (!msg)
+		return ERR_PTR(-ENOMEM);
+
+	msg->len = size;
+	n = mlx5_calc_cmd_blocks(msg);
+
+	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);
+		block->token = token;
+		head = tmp;
+	}
+	msg->next = head;
+	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;
+
+	if (*pos != 0)
+		return -EINVAL;
+
+	kfree(dbg->in_msg);
+	dbg->in_msg = NULL;
+	dbg->inlen = 0;
+	ptr = memdup_user(buf, count);
+	if (IS_ERR(ptr))
+		return PTR_ERR(ptr);
+	dbg->in_msg = ptr;
+	dbg->inlen = count;
+
+	*pos = count;
+
+	return count;
+}
+
+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;
+
+	if (!dbg->out_msg)
+		return -ENOMEM;
+
+	return simple_read_from_buffer(buf, count, pos, dbg->out_msg,
+				       dbg->outlen);
+}
+
+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;
+
+	err = snprintf(outlen, sizeof(outlen), "%d", dbg->outlen);
+	if (err < 0)
+		return err;
+
+	return simple_read_from_buffer(buf, count, pos, outlen, 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] = {0};
+	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;
+
+	err = sscanf(outlen_str, "%d", &outlen);
+	if (err != 1)
+		return -EINVAL;
+
+	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->device));
+}
+
+static void clean_debug_files(struct mlx5_core_dev *dev)
+{
+	struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
+
+	if (!mlx5_debugfs_root)
+		return;
+
+	debugfs_remove_recursive(dbg->dbg_root);
+}
+
+static void create_debugfs_files(struct mlx5_core_dev *dev)
+{
+	struct mlx5_cmd_debug *dbg = &dev->cmd.dbg;
+
+	dbg->dbg_root = debugfs_create_dir("cmd", mlx5_debugfs_get_dev_root(dev));
+
+	debugfs_create_file("in", 0400, dbg->dbg_root, dev, &dfops);
+	debugfs_create_file("out", 0200, dbg->dbg_root, dev, &dfops);
+	debugfs_create_file("out_len", 0600, dbg->dbg_root, dev, &olfops);
+	debugfs_create_u8("status", 0600, dbg->dbg_root, &dbg->status);
+	debugfs_create_file("run", 0200, dbg->dbg_root, dev, &fops);
+}
+
+void mlx5_cmd_allowed_opcode(struct mlx5_core_dev *dev, u16 opcode)
+{
+	struct mlx5_cmd *cmd = &dev->cmd;
+	int i;
+
+	for (i = 0; i < cmd->vars.max_reg_cmds; i++)
+		down(&cmd->vars.sem);
+	down(&cmd->vars.pages_sem);
+
+	cmd->allowed_opcode = opcode;
+
+	up(&cmd->vars.pages_sem);
+	for (i = 0; i < cmd->vars.max_reg_cmds; i++)
+		up(&cmd->vars.sem);
+}
+
+static void mlx5_cmd_change_mod(struct mlx5_core_dev *dev, int mode)
+{
+	struct mlx5_cmd *cmd = &dev->cmd;
+	int i;
+
+	for (i = 0; i < cmd->vars.max_reg_cmds; i++)
+		down(&cmd->vars.sem);
+	down(&cmd->vars.pages_sem);
+
+	cmd->mode = mode;
+
+	up(&cmd->vars.pages_sem);
+	for (i = 0; i < cmd->vars.max_reg_cmds; i++)
+		up(&cmd->vars.sem);
+}
+
+static int cmd_comp_notifier(struct notifier_block *nb,
+			     unsigned long type, void *data)
+{
+	struct mlx5_core_dev *dev;
+	struct mlx5_cmd *cmd;
+	struct mlx5_eqe *eqe;
+
+	cmd = mlx5_nb_cof(nb, struct mlx5_cmd, nb);
+	dev = container_of(cmd, struct mlx5_core_dev, cmd);
+	eqe = data;
+
+	mlx5_cmd_comp_handler(dev, be32_to_cpu(eqe->data.cmd.vector), false);
+
+	return NOTIFY_OK;
+}
+void mlx5_cmd_use_events(struct mlx5_core_dev *dev)
+{
+	MLX5_NB_INIT(&dev->cmd.nb, cmd_comp_notifier, CMD);
+	mlx5_eq_notifier_register(dev, &dev->cmd.nb);
+	mlx5_cmd_change_mod(dev, CMD_MODE_EVENTS);
+}
+
+void mlx5_cmd_use_polling(struct mlx5_core_dev *dev)
+{
+	mlx5_cmd_change_mod(dev, CMD_MODE_POLLING);
+	mlx5_eq_notifier_unregister(dev, &dev->cmd.nb);
+}
+
+static void free_msg(struct mlx5_core_dev *dev, struct mlx5_cmd_msg *msg)
+{
+	unsigned long flags;
+
+	if (msg->parent) {
+		spin_lock_irqsave(&msg->parent->lock, flags);
+		list_add_tail(&msg->list, &msg->parent->head);
+		spin_unlock_irqrestore(&msg->parent->lock, flags);
+	} else {
+		mlx5_free_cmd_msg(dev, msg);
+	}
+}
+
+static void mlx5_cmd_comp_handler(struct mlx5_core_dev *dev, u64 vec, bool forced)
+{
+	struct mlx5_cmd *cmd = &dev->cmd;
+	struct mlx5_cmd_work_ent *ent;
+	mlx5_cmd_cbk_t callback;
+	void *context;
+	int err;
+	int i;
+	s64 ds;
+	struct mlx5_cmd_stats *stats;
+	unsigned long flags;
+	unsigned long vector;
+
+	/* there can be at most 32 command queues */
+	vector = vec & 0xffffffff;
+	for (i = 0; i < (1 << cmd->vars.log_sz); i++) {
+		if (test_bit(i, &vector)) {
+			ent = cmd->ent_arr[i];
+
+			/* if we already completed the command, ignore it */
+			if (!test_and_clear_bit(MLX5_CMD_ENT_STATE_PENDING_COMP,
+						&ent->state)) {
+				/* only real completion can free the cmd slot */
+				if (!forced) {
+					mlx5_core_err(dev, "Command completion arrived after timeout (entry idx = %d).\n",
+						      ent->idx);
+					cmd_ent_put(ent);
+				}
+				continue;
+			}
+
+			if (ent->callback && cancel_delayed_work(&ent->cb_timeout_work))
+				cmd_ent_put(ent); /* timeout work was canceled */
+
+			if (!forced || /* Real FW completion */
+			     mlx5_cmd_is_down(dev) || /* No real FW completion is expected */
+			     !opcode_allowed(cmd, ent->op))
+				cmd_ent_put(ent);
+
+			ent->ts2 = ktime_get_ns();
+			memcpy(ent->out->first.data, ent->lay->out, sizeof(ent->lay->out));
+			dump_command(dev, ent, 0);
+
+			if (vec & MLX5_TRIGGERED_CMD_COMP)
+				ent->ret = -ENXIO;
+
+			if (!ent->ret) { /* Command completed by FW */
+				if (!cmd->checksum_disabled)
+					ent->ret = verify_signature(ent);
+
+				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);
+			}
+
+			if (ent->callback) {
+				ds = ent->ts2 - ent->ts1;
+				stats = xa_load(&cmd->stats, ent->op);
+				if (stats) {
+					spin_lock_irqsave(&stats->lock, flags);
+					stats->sum += ds;
+					++stats->n;
+					spin_unlock_irqrestore(&stats->lock, flags);
+				}
+
+				callback = ent->callback;
+				context = ent->context;
+				err = ent->ret ? : ent->status;
+				if (err > 0) /* Failed in FW, command didn't execute */
+					err = deliv_status_to_err(err);
+
+				if (!err)
+					err = mlx5_copy_from_msg(ent->uout,
+								 ent->out,
+								 ent->uout_size);
+
+				mlx5_free_cmd_msg(dev, ent->out);
+				free_msg(dev, ent->in);
+
+				/* final consumer is done, release ent */
+				cmd_ent_put(ent);
+				callback(err, context);
+			} else {
+				/* release wait_func() so mlx5_cmd_invoke()
+				 * can make the final ent_put()
+				 */
+				complete(&ent->done);
+			}
+		}
+	}
+}
+
+static void mlx5_cmd_trigger_completions(struct mlx5_core_dev *dev)
+{
+	struct mlx5_cmd *cmd = &dev->cmd;
+	unsigned long bitmask;
+	unsigned long flags;
+	u64 vector;
+	int i;
+
+	/* wait for pending handlers to complete */
+	mlx5_eq_synchronize_cmd_irq(dev);
+	spin_lock_irqsave(&dev->cmd.alloc_lock, flags);
+	vector = ~dev->cmd.vars.bitmask & ((1ul << (1 << dev->cmd.vars.log_sz)) - 1);
+	if (!vector)
+		goto no_trig;
+
+	bitmask = vector;
+	/* we must increment the allocated entries refcount before triggering the completions
+	 * to guarantee pending commands will not get freed in the meanwhile.
+	 * For that reason, it also has to be done inside the alloc_lock.
+	 */
+	for_each_set_bit(i, &bitmask, (1 << cmd->vars.log_sz))
+		cmd_ent_get(cmd->ent_arr[i]);
+	vector |= MLX5_TRIGGERED_CMD_COMP;
+	spin_unlock_irqrestore(&dev->cmd.alloc_lock, flags);
+
+	mlx5_core_dbg(dev, "vector 0x%llx\n", vector);
+	mlx5_cmd_comp_handler(dev, vector, true);
+	for_each_set_bit(i, &bitmask, (1 << cmd->vars.log_sz))
+		cmd_ent_put(cmd->ent_arr[i]);
+	return;
+
+no_trig:
+	spin_unlock_irqrestore(&dev->cmd.alloc_lock, flags);
+}
+
+void mlx5_cmd_flush(struct mlx5_core_dev *dev)
+{
+	struct mlx5_cmd *cmd = &dev->cmd;
+	int i;
+
+	for (i = 0; i < cmd->vars.max_reg_cmds; i++) {
+		while (down_trylock(&cmd->vars.sem)) {
+			mlx5_cmd_trigger_completions(dev);
+			cond_resched();
+		}
+	}
+
+	while (down_trylock(&cmd->vars.pages_sem)) {
+		mlx5_cmd_trigger_completions(dev);
+		cond_resched();
+	}
+
+	/* Unlock cmdif */
+	up(&cmd->vars.pages_sem);
+	for (i = 0; i < cmd->vars.max_reg_cmds; i++)
+		up(&cmd->vars.sem);
+}
+
+static struct mlx5_cmd_msg *alloc_msg(struct mlx5_core_dev *dev, int in_size,
+				      gfp_t gfp)
+{
+	struct mlx5_cmd_msg *msg = ERR_PTR(-ENOMEM);
+	struct cmd_msg_cache *ch = NULL;
+	struct mlx5_cmd *cmd = &dev->cmd;
+	int i;
+
+	if (in_size <= 16)
+		goto cache_miss;
+
+	for (i = 0; i < dev->profile.num_cmd_caches; i++) {
+		ch = &cmd->cache[i];
+		if (in_size > ch->max_inbox_size)
+			continue;
+		spin_lock_irq(&ch->lock);
+		if (list_empty(&ch->head)) {
+			spin_unlock_irq(&ch->lock);
+			continue;
+		}
+		msg = list_entry(ch->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_irq(&ch->lock);
+		break;
+	}
+
+	if (!IS_ERR(msg))
+		return msg;
+
+cache_miss:
+	msg = mlx5_alloc_cmd_msg(dev, gfp, in_size, 0);
+	return msg;
+}
+
+static int is_manage_pages(void *in)
+{
+	return in_to_opcode(in) == MLX5_CMD_OP_MANAGE_PAGES;
+}
+
+/*  Notes:
+ *    1. Callback functions may not sleep
+ *    2. Page queue commands do not support asynchrous completion
+ */
+static int cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out,
+		    int out_size, mlx5_cmd_cbk_t callback, void *context,
+		    bool force_polling)
+{
+	struct mlx5_cmd_msg *inb, *outb;
+	u16 opcode = in_to_opcode(in);
+	bool throttle_op;
+	int pages_queue;
+	gfp_t gfp;
+	u8 token;
+	int err;
+
+	if (mlx5_cmd_is_down(dev) || !opcode_allowed(&dev->cmd, opcode))
+		return -ENXIO;
+
+	throttle_op = mlx5_cmd_is_throttle_opcode(opcode);
+	if (throttle_op) {
+		/* atomic context may not sleep */
+		if (callback)
+			return -EINVAL;
+		down(&dev->cmd.vars.throttle_sem);
+	}
+
+	pages_queue = is_manage_pages(in);
+	gfp = callback ? GFP_ATOMIC : GFP_KERNEL;
+
+	inb = alloc_msg(dev, in_size, gfp);
+	if (IS_ERR(inb)) {
+		err = PTR_ERR(inb);
+		goto out_up;
+	}
+
+	token = alloc_token(&dev->cmd);
+
+	err = mlx5_copy_to_msg(inb, in, in_size, token);
+	if (err) {
+		mlx5_core_warn(dev, "err %d\n", err);
+		goto out_in;
+	}
+
+	outb = mlx5_alloc_cmd_msg(dev, gfp, out_size, token);
+	if (IS_ERR(outb)) {
+		err = PTR_ERR(outb);
+		goto out_in;
+	}
+
+	err = mlx5_cmd_invoke(dev, inb, outb, out, out_size, callback, context,
+			      pages_queue, token, force_polling);
+	if (callback)
+		return err;
+
+	if (err > 0) /* Failed in FW, command didn't execute */
+		err = deliv_status_to_err(err);
+
+	if (err)
+		goto out_out;
+
+	/* command completed by FW */
+	err = mlx5_copy_from_msg(out, outb, out_size);
+out_out:
+	mlx5_free_cmd_msg(dev, outb);
+out_in:
+	free_msg(dev, inb);
+out_up:
+	if (throttle_op)
+		up(&dev->cmd.vars.throttle_sem);
+	return err;
+}
+
+static void mlx5_cmd_err_trace(struct mlx5_core_dev *dev, u16 opcode, u16 op_mod, void *out)
+{
+	u32 syndrome = MLX5_GET(mbox_out, out, syndrome);
+	u8 status = MLX5_GET(mbox_out, out, status);
+
+	trace_mlx5_cmd(mlx5_command_str(opcode), opcode, op_mod,
+		       cmd_status_str(status), status, syndrome,
+		       cmd_status_to_err(status));
+}
+
+static void cmd_status_log(struct mlx5_core_dev *dev, u16 opcode, u8 status,
+			   u32 syndrome, int err)
+{
+	const char *namep = mlx5_command_str(opcode);
+	struct mlx5_cmd_stats *stats;
+	unsigned long flags;
+
+	if (!err || !(strcmp(namep, "unknown command opcode")))
+		return;
+
+	stats = xa_load(&dev->cmd.stats, opcode);
+	if (!stats)
+		return;
+	spin_lock_irqsave(&stats->lock, flags);
+	stats->failed++;
+	if (err < 0)
+		stats->last_failed_errno = -err;
+	if (err == -EREMOTEIO) {
+		stats->failed_mbox_status++;
+		stats->last_failed_mbox_status = status;
+		stats->last_failed_syndrome = syndrome;
+	}
+	spin_unlock_irqrestore(&stats->lock, flags);
+}
+
+/* preserve -EREMOTEIO for outbox.status != OK, otherwise return err as is */
+static int cmd_status_err(struct mlx5_core_dev *dev, int err, u16 opcode, u16 op_mod, void *out)
+{
+	u32 syndrome = MLX5_GET(mbox_out, out, syndrome);
+	u8 status = MLX5_GET(mbox_out, out, status);
+
+	if (err == -EREMOTEIO) /* -EREMOTEIO is preserved */
+		err = -EIO;
+
+	if (!err && status != MLX5_CMD_STAT_OK) {
+		err = -EREMOTEIO;
+		mlx5_cmd_err_trace(dev, opcode, op_mod, out);
+	}
+
+	cmd_status_log(dev, opcode, status, syndrome, err);
+	return err;
+}
+
+/**
+ * mlx5_cmd_do - Executes a fw command, wait for completion.
+ * Unlike mlx5_cmd_exec, this function will not translate or intercept
+ * outbox.status and will return -EREMOTEIO when
+ * outbox.status != MLX5_CMD_STAT_OK
+ *
+ * @dev: mlx5 core device
+ * @in: inbox mlx5_ifc command buffer
+ * @in_size: inbox buffer size
+ * @out: outbox mlx5_ifc buffer
+ * @out_size: outbox size
+ *
+ * @return:
+ * -EREMOTEIO : Command executed by FW, outbox.status != MLX5_CMD_STAT_OK.
+ *              Caller must check FW outbox status.
+ *   0 : Command execution successful, outbox.status == MLX5_CMD_STAT_OK.
+ * < 0 : Command execution couldn't be performed by firmware or driver
+ */
+int mlx5_cmd_do(struct mlx5_core_dev *dev, void *in, int in_size, void *out, int out_size)
+{
+	int err = cmd_exec(dev, in, in_size, out, out_size, NULL, NULL, false);
+	u16 op_mod = MLX5_GET(mbox_in, in, op_mod);
+	u16 opcode = in_to_opcode(in);
+
+	return cmd_status_err(dev, err, opcode, op_mod, out);
+}
+EXPORT_SYMBOL(mlx5_cmd_do);
+
+/**
+ * mlx5_cmd_exec - Executes a fw command, wait for completion
+ *
+ * @dev: mlx5 core device
+ * @in: inbox mlx5_ifc command buffer
+ * @in_size: inbox buffer size
+ * @out: outbox mlx5_ifc buffer
+ * @out_size: outbox size
+ *
+ * @return: 0 if no error, FW command execution was successful
+ *          and outbox status is ok.
+ */
+int mlx5_cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out,
+		  int out_size)
+{
+	int err = mlx5_cmd_do(dev, in, in_size, out, out_size);
+
+	return mlx5_cmd_check(dev, err, in, out);
+}
+EXPORT_SYMBOL(mlx5_cmd_exec);
+
+/**
+ * mlx5_cmd_exec_polling - Executes a fw command, poll for completion
+ *	Needed for driver force teardown, when command completion EQ
+ *	will not be available to complete the command
+ *
+ * @dev: mlx5 core device
+ * @in: inbox mlx5_ifc command buffer
+ * @in_size: inbox buffer size
+ * @out: outbox mlx5_ifc buffer
+ * @out_size: outbox size
+ *
+ * @return: 0 if no error, FW command execution was successful
+ *          and outbox status is ok.
+ */
+int mlx5_cmd_exec_polling(struct mlx5_core_dev *dev, void *in, int in_size,
+			  void *out, int out_size)
+{
+	int err = cmd_exec(dev, in, in_size, out, out_size, NULL, NULL, true);
+	u16 op_mod = MLX5_GET(mbox_in, in, op_mod);
+	u16 opcode = in_to_opcode(in);
+
+	err = cmd_status_err(dev, err, opcode, op_mod, out);
+	return mlx5_cmd_check(dev, err, in, out);
+}
+EXPORT_SYMBOL(mlx5_cmd_exec_polling);
+
+void mlx5_cmd_init_async_ctx(struct mlx5_core_dev *dev,
+			     struct mlx5_async_ctx *ctx)
+{
+	ctx->dev = dev;
+	/* Starts at 1 to avoid doing wake_up if we are not cleaning up */
+	atomic_set(&ctx->num_inflight, 1);
+	init_completion(&ctx->inflight_done);
+}
+EXPORT_SYMBOL(mlx5_cmd_init_async_ctx);
+
+/**
+ * mlx5_cmd_cleanup_async_ctx - Clean up an async_ctx
+ * @ctx: The ctx to clean
+ *
+ * Upon return all callbacks given to mlx5_cmd_exec_cb() have been called. The
+ * caller must ensure that mlx5_cmd_exec_cb() is not called during or after
+ * the call mlx5_cleanup_async_ctx().
+ */
+void mlx5_cmd_cleanup_async_ctx(struct mlx5_async_ctx *ctx)
+{
+	if (!atomic_dec_and_test(&ctx->num_inflight))
+		wait_for_completion(&ctx->inflight_done);
+}
+EXPORT_SYMBOL(mlx5_cmd_cleanup_async_ctx);
+
+static void mlx5_cmd_exec_cb_handler(int status, void *_work)
+{
+	struct mlx5_async_work *work = _work;
+	struct mlx5_async_ctx *ctx;
+
+	ctx = work->ctx;
+	status = cmd_status_err(ctx->dev, status, work->opcode, work->op_mod, work->out);
+	work->user_callback(status, work);
+	if (atomic_dec_and_test(&ctx->num_inflight))
+		complete(&ctx->inflight_done);
+}
+
+int mlx5_cmd_exec_cb(struct mlx5_async_ctx *ctx, void *in, int in_size,
+		     void *out, int out_size, mlx5_async_cbk_t callback,
+		     struct mlx5_async_work *work)
+{
+	int ret;
+
+	work->ctx = ctx;
+	work->user_callback = callback;
+	work->opcode = in_to_opcode(in);
+	work->op_mod = MLX5_GET(mbox_in, in, op_mod);
+	work->out = out;
+	if (WARN_ON(!atomic_inc_not_zero(&ctx->num_inflight)))
+		return -EIO;
+	ret = cmd_exec(ctx->dev, in, in_size, out, out_size,
+		       mlx5_cmd_exec_cb_handler, work, false);
+	if (ret && atomic_dec_and_test(&ctx->num_inflight))
+		complete(&ctx->inflight_done);
+
+	return ret;
+}
+EXPORT_SYMBOL(mlx5_cmd_exec_cb);
+
+static void destroy_msg_cache(struct mlx5_core_dev *dev)
+{
+	struct cmd_msg_cache *ch;
+	struct mlx5_cmd_msg *msg;
+	struct mlx5_cmd_msg *n;
+	int i;
+
+	for (i = 0; i < dev->profile.num_cmd_caches; i++) {
+		ch = &dev->cmd.cache[i];
+		list_for_each_entry_safe(msg, n, &ch->head, list) {
+			list_del(&msg->list);
+			mlx5_free_cmd_msg(dev, msg);
+		}
+	}
+}
+
+static unsigned cmd_cache_num_ent[MLX5_NUM_COMMAND_CACHES] = {
+	512, 32, 16, 8, 2
+};
+
+static unsigned cmd_cache_ent_size[MLX5_NUM_COMMAND_CACHES] = {
+	16 + MLX5_CMD_DATA_BLOCK_SIZE,
+	16 + MLX5_CMD_DATA_BLOCK_SIZE * 2,
+	16 + MLX5_CMD_DATA_BLOCK_SIZE * 16,
+	16 + MLX5_CMD_DATA_BLOCK_SIZE * 256,
+	16 + MLX5_CMD_DATA_BLOCK_SIZE * 512,
+};
+
+static void create_msg_cache(struct mlx5_core_dev *dev)
+{
+	struct mlx5_cmd *cmd = &dev->cmd;
+	struct cmd_msg_cache *ch;
+	struct mlx5_cmd_msg *msg;
+	int i;
+	int k;
+
+	/* Initialize and fill the caches with initial entries */
+	for (k = 0; k < dev->profile.num_cmd_caches; k++) {
+		ch = &cmd->cache[k];
+		spin_lock_init(&ch->lock);
+		INIT_LIST_HEAD(&ch->head);
+		ch->num_ent = cmd_cache_num_ent[k];
+		ch->max_inbox_size = cmd_cache_ent_size[k];
+		for (i = 0; i < ch->num_ent; i++) {
+			msg = mlx5_alloc_cmd_msg(dev, GFP_KERNEL | __GFP_NOWARN,
+						 ch->max_inbox_size, 0);
+			if (IS_ERR(msg))
+				break;
+			msg->parent = ch;
+			list_add_tail(&msg->list, &ch->head);
+		}
+	}
+}
+
+static int alloc_cmd_page(struct mlx5_core_dev *dev, struct mlx5_cmd *cmd)
+{
+	cmd->cmd_alloc_buf = dma_alloc_coherent(mlx5_core_dma_dev(dev), MLX5_ADAPTER_PAGE_SIZE,
+						&cmd->alloc_dma, GFP_KERNEL);
+	if (!cmd->cmd_alloc_buf)
+		return -ENOMEM;
+
+	/* make sure it is aligned to 4K */
+	if (!((uintptr_t)cmd->cmd_alloc_buf & (MLX5_ADAPTER_PAGE_SIZE - 1))) {
+		cmd->cmd_buf = cmd->cmd_alloc_buf;
+		cmd->dma = cmd->alloc_dma;
+		cmd->alloc_size = MLX5_ADAPTER_PAGE_SIZE;
+		return 0;
+	}
+
+	dma_free_coherent(mlx5_core_dma_dev(dev), MLX5_ADAPTER_PAGE_SIZE, cmd->cmd_alloc_buf,
+			  cmd->alloc_dma);
+	cmd->cmd_alloc_buf = dma_alloc_coherent(mlx5_core_dma_dev(dev),
+						2 * MLX5_ADAPTER_PAGE_SIZE - 1,
+						&cmd->alloc_dma, GFP_KERNEL);
+	if (!cmd->cmd_alloc_buf)
+		return -ENOMEM;
+
+	cmd->cmd_buf = PTR_ALIGN(cmd->cmd_alloc_buf, MLX5_ADAPTER_PAGE_SIZE);
+	cmd->dma = ALIGN(cmd->alloc_dma, MLX5_ADAPTER_PAGE_SIZE);
+	cmd->alloc_size = 2 * MLX5_ADAPTER_PAGE_SIZE - 1;
+	return 0;
+}
+
+static void free_cmd_page(struct mlx5_core_dev *dev, struct mlx5_cmd *cmd)
+{
+	dma_free_coherent(mlx5_core_dma_dev(dev), cmd->alloc_size, cmd->cmd_alloc_buf,
+			  cmd->alloc_dma);
+}
+
+static u16 cmdif_rev(struct mlx5_core_dev *dev)
+{
+	return ioread32be(&dev->iseg->cmdif_rev_fw_sub) >> 16;
+}
+
+int mlx5_cmd_init(struct mlx5_core_dev *dev)
+{
+	struct mlx5_cmd *cmd = &dev->cmd;
+
+	cmd->checksum_disabled = 1;
+
+	spin_lock_init(&cmd->alloc_lock);
+	spin_lock_init(&cmd->token_lock);
+
+	set_wqname(dev);
+	cmd->wq = create_singlethread_workqueue(cmd->wq_name);
+	if (!cmd->wq) {
+		mlx5_core_err(dev, "failed to create command workqueue\n");
+		return -ENOMEM;
+	}
+
+	mlx5_cmdif_debugfs_init(dev);
+
+	return 0;
+}
+
+void mlx5_cmd_cleanup(struct mlx5_core_dev *dev)
+{
+	struct mlx5_cmd *cmd = &dev->cmd;
+
+	mlx5_cmdif_debugfs_cleanup(dev);
+	destroy_workqueue(cmd->wq);
+}
+
+int mlx5_cmd_enable(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;
+	int err;
+
+	memset(&cmd->vars, 0, sizeof(cmd->vars));
+	cmd->vars.cmdif_rev = cmdif_rev(dev);
+	if (cmd->vars.cmdif_rev != CMD_IF_REV) {
+		mlx5_core_err(dev,
+			      "Driver cmdif rev(%d) differs from firmware's(%d)\n",
+			      CMD_IF_REV, cmd->vars.cmdif_rev);
+		return -EINVAL;
+	}
+
+	cmd_l = ioread32be(&dev->iseg->cmdq_addr_l_sz) & 0xff;
+	cmd->vars.log_sz = cmd_l >> 4 & 0xf;
+	cmd->vars.log_stride = cmd_l & 0xf;
+	if (1 << cmd->vars.log_sz > MLX5_MAX_COMMANDS) {
+		mlx5_core_err(dev, "firmware reports too many outstanding commands %d\n",
+			      1 << cmd->vars.log_sz);
+		return -EINVAL;
+	}
+
+	if (cmd->vars.log_sz + cmd->vars.log_stride > MLX5_ADAPTER_PAGE_SHIFT) {
+		mlx5_core_err(dev, "command queue size overflow\n");
+		return -EINVAL;
+	}
+
+	cmd->state = MLX5_CMDIF_STATE_DOWN;
+	cmd->vars.max_reg_cmds = (1 << cmd->vars.log_sz) - 1;
+	cmd->vars.bitmask = (1UL << cmd->vars.max_reg_cmds) - 1;
+
+	sema_init(&cmd->vars.sem, cmd->vars.max_reg_cmds);
+	sema_init(&cmd->vars.pages_sem, 1);
+	sema_init(&cmd->vars.throttle_sem, DIV_ROUND_UP(cmd->vars.max_reg_cmds, 2));
+
+	cmd->pool = dma_pool_create("mlx5_cmd", mlx5_core_dma_dev(dev), size, align, 0);
+	if (!cmd->pool)
+		return -ENOMEM;
+
+	err = alloc_cmd_page(dev, cmd);
+	if (err)
+		goto err_free_pool;
+
+	cmd_h = (u32)((u64)(cmd->dma) >> 32);
+	cmd_l = (u32)(cmd->dma);
+	if (cmd_l & 0xfff) {
+		mlx5_core_err(dev, "invalid command queue address\n");
+		err = -ENOMEM;
+		goto err_cmd_page;
+	}
+
+	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;
+	cmd->allowed_opcode = CMD_ALLOWED_OPCODE_ALL;
+
+	create_msg_cache(dev);
+	create_debugfs_files(dev);
+
+	return 0;
+
+err_cmd_page:
+	free_cmd_page(dev, cmd);
+err_free_pool:
+	dma_pool_destroy(cmd->pool);
+	return err;
+}
+
+void mlx5_cmd_disable(struct mlx5_core_dev *dev)
+{
+	struct mlx5_cmd *cmd = &dev->cmd;
+
+	flush_workqueue(cmd->wq);
+	clean_debug_files(dev);
+	destroy_msg_cache(dev);
+	free_cmd_page(dev, cmd);
+	dma_pool_destroy(cmd->pool);
+}
+
+void mlx5_cmd_set_state(struct mlx5_core_dev *dev,
+			enum mlx5_cmdif_state cmdif_state)
+{
+	dev->cmd.state = cmdif_state;
+}