/*
* 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/module.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 = 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 struct mlx5_cmd_work_ent *alloc_cmd(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->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;
return 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 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, 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 -EINVAL;
if (xor8_buf(block, 0, sizeof(*block)) != 0xff)
return -EINVAL;
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 size = msg->len;
int blen = size - min_t(int, sizeof(msg->first.data), size);
int n = (blen + MLX5_CMD_DATA_BLOCK_SIZE - 1)
/ MLX5_CMD_DATA_BLOCK_SIZE;
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)
{
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;
int size = ent->out->len;
int blen = size - min_t(int, sizeof(ent->out->first.data), size);
int n = (blen + MLX5_CMD_DATA_BLOCK_SIZE - 1)
/ MLX5_CMD_DATA_BLOCK_SIZE;
int i = 0;
sig = xor8_buf(ent->lay, 0, sizeof(*ent->lay));
if (sig != 0xff)
return -EINVAL;
for (i = 0; i < n && next; i++) {
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");
}
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_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_ENCAP_HEADER:
case MLX5_CMD_OP_DEALLOC_MODIFY_HEADER_CONTEXT:
case MLX5_CMD_OP_FPGA_DESTROY_QP:
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_PAGE_FAULT_RESUME:
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_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_VPORT_COUNTER:
case MLX5_CMD_OP_ALLOC_Q_COUNTER:
case MLX5_CMD_OP_QUERY_Q_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_MODIFY_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_ENCAP_HEADER:
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:
*status = MLX5_DRIVER_STATUS_ABORTED;
*synd = MLX5_DRIVER_SYND;
return -EIO;
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_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_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_ENCAP_HEADER);
MLX5_COMMAND_STR_CASE(DEALLOC_ENCAP_HEADER);
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);
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;
}
}
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 reserved_at_10[0x10];
u8 reserved_at_20[0x10];
u8 op_mod[0x10];
u8 reserved_at_40[0x40];
};
void mlx5_cmd_mbox_status(void *out, u8 *status, u32 *syndrome)
{
*status = MLX5_GET(mbox_out, out, status);
*syndrome = MLX5_GET(mbox_out, out, syndrome);
}
static int mlx5_cmd_check(struct mlx5_core_dev *dev, void *in, void *out)
{
u32 syndrome;
u8 status;
u16 opcode;
u16 op_mod;
mlx5_cmd_mbox_status(out, &status, &syndrome);
if (!status)
return 0;
opcode = MLX5_GET(mbox_in, in, opcode);
op_mod = MLX5_GET(mbox_in, in, op_mod);
mlx5_core_err(dev,
"%s(0x%x) op_mod(0x%x) failed, status %s(0x%x), syndrome (0x%x)\n",
mlx5_command_str(opcode),
opcode, op_mod,
cmd_status_str(status),
status,
syndrome);
return cmd_status_to_err(status);
}
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;
u16 op = MLX5_GET(mbox_in, ent->lay->in, opcode);
struct mlx5_cmd_mailbox *next = msg->next;
int data_only;
u32 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 u16 msg_to_opcode(struct mlx5_cmd_msg *in)
{
return MLX5_GET(mbox_in, in->first.data, opcode);
}
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);
ent->ret = -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_cmd_comp_handler(dev, 1UL << ent->idx, true);
}
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 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);
unsigned long cb_timeout = msecs_to_jiffies(MLX5_CMD_TIMEOUT_MSEC);
struct mlx5_cmd_layout *lay;
struct semaphore *sem;
unsigned long flags;
bool poll_cmd = ent->polling;
int alloc_ret;
int cmd_mode;
sem = ent->page_queue ? &cmd->pages_sem : &cmd->sem;
down(sem);
if (!ent->page_queue) {
alloc_ret = alloc_ent(cmd);
if (alloc_ret < 0) {
mlx5_core_err(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);
free_cmd(ent);
} else {
ent->ret = -EAGAIN;
complete(&ent->done);
}
up(sem);
return;
}
ent->idx = alloc_ret;
} else {
ent->idx = cmd->max_reg_cmds;
spin_lock_irqsave(&cmd->alloc_lock, flags);
clear_bit(ent->idx, &cmd->bitmask);
spin_unlock_irqrestore(&cmd->alloc_lock, flags);
}
cmd->ent_arr[ent->idx] = ent;
set_bit(MLX5_CMD_ENT_STATE_PENDING_COMP, &ent->state);
lay = get_inst(cmd, ent->idx);
ent->lay = lay;
memset(lay, 0, sizeof(*lay));
memcpy(lay->in, ent->in->first.data, sizeof(lay->in));
ent->op = be32_to_cpu(lay->in[0]) >> 16;
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);
/* Skip sending command to fw if internal error */
if (pci_channel_offline(dev->pdev) ||
dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) {
u8 status = 0;
u32 drv_synd;
ent->ret = mlx5_internal_err_ret_value(dev, msg_to_opcode(ent->in), &drv_synd, &status);
MLX5_SET(mbox_out, ent->out, status, status);
MLX5_SET(mbox_out, ent->out, syndrome, drv_synd);
mlx5_cmd_comp_handler(dev, 1UL << 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);
mmiowb();
/* 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, 1UL << ent->idx, (ent->ret == -ETIMEDOUT));
}
}
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";
}
}
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 || ent->polling) {
wait_for_completion(&ent->done);
} else if (!wait_for_completion_timeout(&ent->done, timeout)) {
ent->ret = -ETIMEDOUT;
mlx5_cmd_comp_handler(dev, 1UL << ent->idx, true);
}
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(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, void *uout, int uout_size,
mlx5_cmd_cbk_t callback,
void *context, int page_queue, u8 *status,
u8 token, bool force_polling)
{
struct mlx5_cmd *cmd = &dev->cmd;
struct mlx5_cmd_work_ent *ent;
struct mlx5_cmd_stats *stats;
int err = 0;
s64 ds;
u16 op;
if (callback && page_queue)
return -EINVAL;
ent = alloc_cmd(cmd, in, out, uout, uout_size, callback, context,
page_queue);
if (IS_ERR(ent))
return PTR_ERR(ent);
ent->token = token;
ent->polling = force_polling;
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 = -ENOMEM;
goto out_free;
}
if (callback)
goto out;
err = wait_func(dev, ent);
if (err == -ETIMEDOUT)
goto out;
ds = ent->ts2 - ent->ts1;
op = MLX5_GET(mbox_in, in->first.data, opcode);
if (op < ARRAY_SIZE(cmd->stats)) {
stats = &cmd->stats[op];
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(op), ds);
*status = ent->status;
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,
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 blen;
int err;
int n;
int i;
msg = kzalloc(sizeof(*msg), flags);
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);
block->token = token;
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;
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;
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] = {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 < 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;
}
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->max_reg_cmds; i++)
down(&cmd->sem);
down(&cmd->pages_sem);
cmd->mode = mode;
up(&cmd->pages_sem);
for (i = 0; i < cmd->max_reg_cmds; i++)
up(&cmd->sem);
}
void mlx5_cmd_use_events(struct mlx5_core_dev *dev)
{
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);
}
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);
}
}
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->log_sz); i++) {
if (test_bit(i, &vector)) {
struct semaphore *sem;
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);
free_ent(cmd, ent->idx);
free_cmd(ent);
}
continue;
}
if (ent->callback)
cancel_delayed_work(&ent->cb_timeout_work);
if (ent->page_queue)
sem = &cmd->pages_sem;
else
sem = &cmd->sem;
ent->ts2 = ktime_get_ns();
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;
if (vec & MLX5_TRIGGERED_CMD_COMP)
ent->status = MLX5_DRIVER_STATUS_ABORTED;
else
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);
}
/* only real completion will free the entry slot */
if (!forced)
free_ent(cmd, ent->idx);
if (ent->callback) {
ds = ent->ts2 - ent->ts1;
if (ent->op < ARRAY_SIZE(cmd->stats)) {
stats = &cmd->stats[ent->op];
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;
if (!err) {
err = mlx5_copy_from_msg(ent->uout,
ent->out,
ent->uout_size);
err = err ? err : mlx5_cmd_check(dev,
ent->in->first.data,
ent->uout);
}
mlx5_free_cmd_msg(dev, ent->out);
free_msg(dev, ent->in);
err = err ? err : ent->status;
if (!forced)
free_cmd(ent);
callback(err, context);
} else {
complete(&ent->done);
}
up(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,
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 < MLX5_NUM_COMMAND_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 MLX5_GET(mbox_in, in, opcode) == MLX5_CMD_OP_MANAGE_PAGES;
}
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;
struct mlx5_cmd_msg *outb;
int pages_queue;
gfp_t gfp;
int err;
u8 status = 0;
u32 drv_synd;
u8 token;
if (pci_channel_offline(dev->pdev) ||
dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) {
u16 opcode = MLX5_GET(mbox_in, in, opcode);
err = mlx5_internal_err_ret_value(dev, opcode, &drv_synd, &status);
MLX5_SET(mbox_out, out, status, status);
MLX5_SET(mbox_out, out, syndrome, drv_synd);
return err;
}
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);
return err;
}
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, &status, token, force_polling);
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;
}
if (!callback)
err = mlx5_copy_from_msg(out, outb, out_size);
out_out:
if (!callback)
mlx5_free_cmd_msg(dev, outb);
out_in:
if (!callback)
free_msg(dev, inb);
return err;
}
int mlx5_cmd_exec(struct mlx5_core_dev *dev, void *in, int in_size, void *out,
int out_size)
{
int err;
err = cmd_exec(dev, in, in_size, out, out_size, NULL, NULL, false);
return err ? : mlx5_cmd_check(dev, in, out);
}
EXPORT_SYMBOL(mlx5_cmd_exec);
int mlx5_cmd_exec_cb(struct mlx5_core_dev *dev, void *in, int in_size,
void *out, int out_size, mlx5_cmd_cbk_t callback,
void *context)
{
return cmd_exec(dev, in, in_size, out, out_size, callback, context,
false);
}
EXPORT_SYMBOL(mlx5_cmd_exec_cb);
int mlx5_cmd_exec_polling(struct mlx5_core_dev *dev, void *in, int in_size,
void *out, int out_size)
{
int err;
err = cmd_exec(dev, in, in_size, out, out_size, NULL, NULL, true);
return err ? : mlx5_cmd_check(dev, in, out);
}
EXPORT_SYMBOL(mlx5_cmd_exec_polling);
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 < MLX5_NUM_COMMAND_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 < MLX5_NUM_COMMAND_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)
{
struct device *ddev = &dev->pdev->dev;
cmd->cmd_alloc_buf = dma_zalloc_coherent(ddev, 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(ddev, MLX5_ADAPTER_PAGE_SIZE, cmd->cmd_alloc_buf,
cmd->alloc_dma);
cmd->cmd_alloc_buf = dma_zalloc_coherent(ddev,
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)
{
struct device *ddev = &dev->pdev->dev;
dma_free_coherent(ddev, cmd->alloc_size, cmd->cmd_alloc_buf,
cmd->alloc_dma);
}
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;
memset(cmd, 0, sizeof(*cmd));
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 = dma_pool_create("mlx5_cmd", &dev->pdev->dev, size, align,
0);
if (!cmd->pool)
return -ENOMEM;
err = alloc_cmd_page(dev, cmd);
if (err)
goto err_free_pool;
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_free_page;
}
if (cmd->log_sz + cmd->log_stride > MLX5_ADAPTER_PAGE_SHIFT) {
dev_err(&dev->pdev->dev, "command queue size overflow\n");
err = -EINVAL;
goto err_free_page;
}
cmd->checksum_disabled = 1;
cmd->max_reg_cmds = (1 << cmd->log_sz) - 1;
cmd->bitmask = (1UL << 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 = -EOPNOTSUPP;
goto err_free_page;
}
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_free_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;
create_msg_cache(dev);
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_free_page:
free_cmd_page(dev, cmd);
err_free_pool:
dma_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);
free_cmd_page(dev, cmd);
dma_pool_destroy(cmd->pool);
}
EXPORT_SYMBOL(mlx5_cmd_cleanup);