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linux-zen-server/drivers/net/ethernet/amazon/ena/ena_com.c

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Initial commit
2023-08-30 17:53:23 +02:00
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
* Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
*/
#include "ena_com.h"
/*****************************************************************************/
/*****************************************************************************/
/* Timeout in micro-sec */
#define ADMIN_CMD_TIMEOUT_US (3000000)
#define ENA_ASYNC_QUEUE_DEPTH 16
#define ENA_ADMIN_QUEUE_DEPTH 32
#define ENA_CTRL_MAJOR 0
#define ENA_CTRL_MINOR 0
#define ENA_CTRL_SUB_MINOR 1
#define MIN_ENA_CTRL_VER \
(((ENA_CTRL_MAJOR) << \
(ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT)) | \
((ENA_CTRL_MINOR) << \
(ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT)) | \
(ENA_CTRL_SUB_MINOR))
#define ENA_DMA_ADDR_TO_UINT32_LOW(x) ((u32)((u64)(x)))
#define ENA_DMA_ADDR_TO_UINT32_HIGH(x) ((u32)(((u64)(x)) >> 32))
#define ENA_MMIO_READ_TIMEOUT 0xFFFFFFFF
#define ENA_COM_BOUNCE_BUFFER_CNTRL_CNT 4
#define ENA_REGS_ADMIN_INTR_MASK 1
#define ENA_MIN_ADMIN_POLL_US 100
#define ENA_MAX_ADMIN_POLL_US 5000
/*****************************************************************************/
/*****************************************************************************/
/*****************************************************************************/
enum ena_cmd_status {
ENA_CMD_SUBMITTED,
ENA_CMD_COMPLETED,
/* Abort - canceled by the driver */
ENA_CMD_ABORTED,
};
struct ena_comp_ctx {
struct completion wait_event;
struct ena_admin_acq_entry *user_cqe;
u32 comp_size;
enum ena_cmd_status status;
/* status from the device */
u8 comp_status;
u8 cmd_opcode;
bool occupied;
};
struct ena_com_stats_ctx {
struct ena_admin_aq_get_stats_cmd get_cmd;
struct ena_admin_acq_get_stats_resp get_resp;
};
static int ena_com_mem_addr_set(struct ena_com_dev *ena_dev,
struct ena_common_mem_addr *ena_addr,
dma_addr_t addr)
{
if ((addr & GENMASK_ULL(ena_dev->dma_addr_bits - 1, 0)) != addr) {
netdev_err(ena_dev->net_device,
"DMA address has more bits that the device supports\n");
return -EINVAL;
}
ena_addr->mem_addr_low = lower_32_bits(addr);
ena_addr->mem_addr_high = (u16)upper_32_bits(addr);
return 0;
}
static int ena_com_admin_init_sq(struct ena_com_admin_queue *admin_queue)
{
struct ena_com_dev *ena_dev = admin_queue->ena_dev;
struct ena_com_admin_sq *sq = &admin_queue->sq;
u16 size = ADMIN_SQ_SIZE(admin_queue->q_depth);
sq->entries = dma_alloc_coherent(admin_queue->q_dmadev, size,
&sq->dma_addr, GFP_KERNEL);
if (!sq->entries) {
netdev_err(ena_dev->net_device, "Memory allocation failed\n");
return -ENOMEM;
}
sq->head = 0;
sq->tail = 0;
sq->phase = 1;
sq->db_addr = NULL;
return 0;
}
static int ena_com_admin_init_cq(struct ena_com_admin_queue *admin_queue)
{
struct ena_com_dev *ena_dev = admin_queue->ena_dev;
struct ena_com_admin_cq *cq = &admin_queue->cq;
u16 size = ADMIN_CQ_SIZE(admin_queue->q_depth);
cq->entries = dma_alloc_coherent(admin_queue->q_dmadev, size,
&cq->dma_addr, GFP_KERNEL);
if (!cq->entries) {
netdev_err(ena_dev->net_device, "Memory allocation failed\n");
return -ENOMEM;
}
cq->head = 0;
cq->phase = 1;
return 0;
}
static int ena_com_admin_init_aenq(struct ena_com_dev *ena_dev,
struct ena_aenq_handlers *aenq_handlers)
{
struct ena_com_aenq *aenq = &ena_dev->aenq;
u32 addr_low, addr_high, aenq_caps;
u16 size;
ena_dev->aenq.q_depth = ENA_ASYNC_QUEUE_DEPTH;
size = ADMIN_AENQ_SIZE(ENA_ASYNC_QUEUE_DEPTH);
aenq->entries = dma_alloc_coherent(ena_dev->dmadev, size,
&aenq->dma_addr, GFP_KERNEL);
if (!aenq->entries) {
netdev_err(ena_dev->net_device, "Memory allocation failed\n");
return -ENOMEM;
}
aenq->head = aenq->q_depth;
aenq->phase = 1;
addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(aenq->dma_addr);
addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(aenq->dma_addr);
writel(addr_low, ena_dev->reg_bar + ENA_REGS_AENQ_BASE_LO_OFF);
writel(addr_high, ena_dev->reg_bar + ENA_REGS_AENQ_BASE_HI_OFF);
aenq_caps = 0;
aenq_caps |= ena_dev->aenq.q_depth & ENA_REGS_AENQ_CAPS_AENQ_DEPTH_MASK;
aenq_caps |= (sizeof(struct ena_admin_aenq_entry)
<< ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_SHIFT) &
ENA_REGS_AENQ_CAPS_AENQ_ENTRY_SIZE_MASK;
writel(aenq_caps, ena_dev->reg_bar + ENA_REGS_AENQ_CAPS_OFF);
if (unlikely(!aenq_handlers)) {
netdev_err(ena_dev->net_device,
"AENQ handlers pointer is NULL\n");
return -EINVAL;
}
aenq->aenq_handlers = aenq_handlers;
return 0;
}
static void comp_ctxt_release(struct ena_com_admin_queue *queue,
struct ena_comp_ctx *comp_ctx)
{
comp_ctx->occupied = false;
atomic_dec(&queue->outstanding_cmds);
}
static struct ena_comp_ctx *get_comp_ctxt(struct ena_com_admin_queue *admin_queue,
u16 command_id, bool capture)
{
if (unlikely(command_id >= admin_queue->q_depth)) {
netdev_err(admin_queue->ena_dev->net_device,
"Command id is larger than the queue size. cmd_id: %u queue size %d\n",
command_id, admin_queue->q_depth);
return NULL;
}
if (unlikely(!admin_queue->comp_ctx)) {
netdev_err(admin_queue->ena_dev->net_device,
"Completion context is NULL\n");
return NULL;
}
if (unlikely(admin_queue->comp_ctx[command_id].occupied && capture)) {
netdev_err(admin_queue->ena_dev->net_device,
"Completion context is occupied\n");
return NULL;
}
if (capture) {
atomic_inc(&admin_queue->outstanding_cmds);
admin_queue->comp_ctx[command_id].occupied = true;
}
return &admin_queue->comp_ctx[command_id];
}
static struct ena_comp_ctx *__ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue,
struct ena_admin_aq_entry *cmd,
size_t cmd_size_in_bytes,
struct ena_admin_acq_entry *comp,
size_t comp_size_in_bytes)
{
struct ena_comp_ctx *comp_ctx;
u16 tail_masked, cmd_id;
u16 queue_size_mask;
u16 cnt;
queue_size_mask = admin_queue->q_depth - 1;
tail_masked = admin_queue->sq.tail & queue_size_mask;
/* In case of queue FULL */
cnt = (u16)atomic_read(&admin_queue->outstanding_cmds);
if (cnt >= admin_queue->q_depth) {
netdev_dbg(admin_queue->ena_dev->net_device,
"Admin queue is full.\n");
admin_queue->stats.out_of_space++;
return ERR_PTR(-ENOSPC);
}
cmd_id = admin_queue->curr_cmd_id;
cmd->aq_common_descriptor.flags |= admin_queue->sq.phase &
ENA_ADMIN_AQ_COMMON_DESC_PHASE_MASK;
cmd->aq_common_descriptor.command_id |= cmd_id &
ENA_ADMIN_AQ_COMMON_DESC_COMMAND_ID_MASK;
comp_ctx = get_comp_ctxt(admin_queue, cmd_id, true);
if (unlikely(!comp_ctx))
return ERR_PTR(-EINVAL);
comp_ctx->status = ENA_CMD_SUBMITTED;
comp_ctx->comp_size = (u32)comp_size_in_bytes;
comp_ctx->user_cqe = comp;
comp_ctx->cmd_opcode = cmd->aq_common_descriptor.opcode;
reinit_completion(&comp_ctx->wait_event);
memcpy(&admin_queue->sq.entries[tail_masked], cmd, cmd_size_in_bytes);
admin_queue->curr_cmd_id = (admin_queue->curr_cmd_id + 1) &
queue_size_mask;
admin_queue->sq.tail++;
admin_queue->stats.submitted_cmd++;
if (unlikely((admin_queue->sq.tail & queue_size_mask) == 0))
admin_queue->sq.phase = !admin_queue->sq.phase;
writel(admin_queue->sq.tail, admin_queue->sq.db_addr);
return comp_ctx;
}
static int ena_com_init_comp_ctxt(struct ena_com_admin_queue *admin_queue)
{
struct ena_com_dev *ena_dev = admin_queue->ena_dev;
size_t size = admin_queue->q_depth * sizeof(struct ena_comp_ctx);
struct ena_comp_ctx *comp_ctx;
u16 i;
admin_queue->comp_ctx =
devm_kzalloc(admin_queue->q_dmadev, size, GFP_KERNEL);
if (unlikely(!admin_queue->comp_ctx)) {
netdev_err(ena_dev->net_device, "Memory allocation failed\n");
return -ENOMEM;
}
for (i = 0; i < admin_queue->q_depth; i++) {
comp_ctx = get_comp_ctxt(admin_queue, i, false);
if (comp_ctx)
init_completion(&comp_ctx->wait_event);
}
return 0;
}
static struct ena_comp_ctx *ena_com_submit_admin_cmd(struct ena_com_admin_queue *admin_queue,
struct ena_admin_aq_entry *cmd,
size_t cmd_size_in_bytes,
struct ena_admin_acq_entry *comp,
size_t comp_size_in_bytes)
{
unsigned long flags = 0;
struct ena_comp_ctx *comp_ctx;
spin_lock_irqsave(&admin_queue->q_lock, flags);
if (unlikely(!admin_queue->running_state)) {
spin_unlock_irqrestore(&admin_queue->q_lock, flags);
return ERR_PTR(-ENODEV);
}
comp_ctx = __ena_com_submit_admin_cmd(admin_queue, cmd,
cmd_size_in_bytes,
comp,
comp_size_in_bytes);
if (IS_ERR(comp_ctx))
admin_queue->running_state = false;
spin_unlock_irqrestore(&admin_queue->q_lock, flags);
return comp_ctx;
}
static int ena_com_init_io_sq(struct ena_com_dev *ena_dev,
struct ena_com_create_io_ctx *ctx,
struct ena_com_io_sq *io_sq)
{
size_t size;
int dev_node = 0;
memset(&io_sq->desc_addr, 0x0, sizeof(io_sq->desc_addr));
io_sq->dma_addr_bits = (u8)ena_dev->dma_addr_bits;
io_sq->desc_entry_size =
(io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
sizeof(struct ena_eth_io_tx_desc) :
sizeof(struct ena_eth_io_rx_desc);
size = io_sq->desc_entry_size * io_sq->q_depth;
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
dev_node = dev_to_node(ena_dev->dmadev);
set_dev_node(ena_dev->dmadev, ctx->numa_node);
io_sq->desc_addr.virt_addr =
dma_alloc_coherent(ena_dev->dmadev, size,
&io_sq->desc_addr.phys_addr,
GFP_KERNEL);
set_dev_node(ena_dev->dmadev, dev_node);
if (!io_sq->desc_addr.virt_addr) {
io_sq->desc_addr.virt_addr =
dma_alloc_coherent(ena_dev->dmadev, size,
&io_sq->desc_addr.phys_addr,
GFP_KERNEL);
}
if (!io_sq->desc_addr.virt_addr) {
netdev_err(ena_dev->net_device,
"Memory allocation failed\n");
return -ENOMEM;
}
}
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
/* Allocate bounce buffers */
io_sq->bounce_buf_ctrl.buffer_size =
ena_dev->llq_info.desc_list_entry_size;
io_sq->bounce_buf_ctrl.buffers_num =
ENA_COM_BOUNCE_BUFFER_CNTRL_CNT;
io_sq->bounce_buf_ctrl.next_to_use = 0;
size = io_sq->bounce_buf_ctrl.buffer_size *
io_sq->bounce_buf_ctrl.buffers_num;
dev_node = dev_to_node(ena_dev->dmadev);
set_dev_node(ena_dev->dmadev, ctx->numa_node);
io_sq->bounce_buf_ctrl.base_buffer =
devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
set_dev_node(ena_dev->dmadev, dev_node);
if (!io_sq->bounce_buf_ctrl.base_buffer)
io_sq->bounce_buf_ctrl.base_buffer =
devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
if (!io_sq->bounce_buf_ctrl.base_buffer) {
netdev_err(ena_dev->net_device,
"Bounce buffer memory allocation failed\n");
return -ENOMEM;
}
memcpy(&io_sq->llq_info, &ena_dev->llq_info,
sizeof(io_sq->llq_info));
/* Initiate the first bounce buffer */
io_sq->llq_buf_ctrl.curr_bounce_buf =
ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl);
memset(io_sq->llq_buf_ctrl.curr_bounce_buf,
0x0, io_sq->llq_info.desc_list_entry_size);
io_sq->llq_buf_ctrl.descs_left_in_line =
io_sq->llq_info.descs_num_before_header;
io_sq->disable_meta_caching =
io_sq->llq_info.disable_meta_caching;
if (io_sq->llq_info.max_entries_in_tx_burst > 0)
io_sq->entries_in_tx_burst_left =
io_sq->llq_info.max_entries_in_tx_burst;
}
io_sq->tail = 0;
io_sq->next_to_comp = 0;
io_sq->phase = 1;
return 0;
}
static int ena_com_init_io_cq(struct ena_com_dev *ena_dev,
struct ena_com_create_io_ctx *ctx,
struct ena_com_io_cq *io_cq)
{
size_t size;
int prev_node = 0;
memset(&io_cq->cdesc_addr, 0x0, sizeof(io_cq->cdesc_addr));
/* Use the basic completion descriptor for Rx */
io_cq->cdesc_entry_size_in_bytes =
(io_cq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX) ?
sizeof(struct ena_eth_io_tx_cdesc) :
sizeof(struct ena_eth_io_rx_cdesc_base);
size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
prev_node = dev_to_node(ena_dev->dmadev);
set_dev_node(ena_dev->dmadev, ctx->numa_node);
io_cq->cdesc_addr.virt_addr =
dma_alloc_coherent(ena_dev->dmadev, size,
&io_cq->cdesc_addr.phys_addr, GFP_KERNEL);
set_dev_node(ena_dev->dmadev, prev_node);
if (!io_cq->cdesc_addr.virt_addr) {
io_cq->cdesc_addr.virt_addr =
dma_alloc_coherent(ena_dev->dmadev, size,
&io_cq->cdesc_addr.phys_addr,
GFP_KERNEL);
}
if (!io_cq->cdesc_addr.virt_addr) {
netdev_err(ena_dev->net_device, "Memory allocation failed\n");
return -ENOMEM;
}
io_cq->phase = 1;
io_cq->head = 0;
return 0;
}
static void ena_com_handle_single_admin_completion(struct ena_com_admin_queue *admin_queue,
struct ena_admin_acq_entry *cqe)
{
struct ena_comp_ctx *comp_ctx;
u16 cmd_id;
cmd_id = cqe->acq_common_descriptor.command &
ENA_ADMIN_ACQ_COMMON_DESC_COMMAND_ID_MASK;
comp_ctx = get_comp_ctxt(admin_queue, cmd_id, false);
if (unlikely(!comp_ctx)) {
netdev_err(admin_queue->ena_dev->net_device,
"comp_ctx is NULL. Changing the admin queue running state\n");
admin_queue->running_state = false;
return;
}
comp_ctx->status = ENA_CMD_COMPLETED;
comp_ctx->comp_status = cqe->acq_common_descriptor.status;
if (comp_ctx->user_cqe)
memcpy(comp_ctx->user_cqe, (void *)cqe, comp_ctx->comp_size);
if (!admin_queue->polling)
complete(&comp_ctx->wait_event);
}
static void ena_com_handle_admin_completion(struct ena_com_admin_queue *admin_queue)
{
struct ena_admin_acq_entry *cqe = NULL;
u16 comp_num = 0;
u16 head_masked;
u8 phase;
head_masked = admin_queue->cq.head & (admin_queue->q_depth - 1);
phase = admin_queue->cq.phase;
cqe = &admin_queue->cq.entries[head_masked];
/* Go over all the completions */
while ((READ_ONCE(cqe->acq_common_descriptor.flags) &
ENA_ADMIN_ACQ_COMMON_DESC_PHASE_MASK) == phase) {
/* Do not read the rest of the completion entry before the
* phase bit was validated
*/
dma_rmb();
ena_com_handle_single_admin_completion(admin_queue, cqe);
head_masked++;
comp_num++;
if (unlikely(head_masked == admin_queue->q_depth)) {
head_masked = 0;
phase = !phase;
}
cqe = &admin_queue->cq.entries[head_masked];
}
admin_queue->cq.head += comp_num;
admin_queue->cq.phase = phase;
admin_queue->sq.head += comp_num;
admin_queue->stats.completed_cmd += comp_num;
}
static int ena_com_comp_status_to_errno(struct ena_com_admin_queue *admin_queue,
u8 comp_status)
{
if (unlikely(comp_status != 0))
netdev_err(admin_queue->ena_dev->net_device,
"Admin command failed[%u]\n", comp_status);
switch (comp_status) {
case ENA_ADMIN_SUCCESS:
return 0;
case ENA_ADMIN_RESOURCE_ALLOCATION_FAILURE:
return -ENOMEM;
case ENA_ADMIN_UNSUPPORTED_OPCODE:
return -EOPNOTSUPP;
case ENA_ADMIN_BAD_OPCODE:
case ENA_ADMIN_MALFORMED_REQUEST:
case ENA_ADMIN_ILLEGAL_PARAMETER:
case ENA_ADMIN_UNKNOWN_ERROR:
return -EINVAL;
case ENA_ADMIN_RESOURCE_BUSY:
return -EAGAIN;
}
return -EINVAL;
}
static void ena_delay_exponential_backoff_us(u32 exp, u32 delay_us)
{
delay_us = max_t(u32, ENA_MIN_ADMIN_POLL_US, delay_us);
delay_us = min_t(u32, delay_us * (1U << exp), ENA_MAX_ADMIN_POLL_US);
usleep_range(delay_us, 2 * delay_us);
}
static int ena_com_wait_and_process_admin_cq_polling(struct ena_comp_ctx *comp_ctx,
struct ena_com_admin_queue *admin_queue)
{
unsigned long flags = 0;
unsigned long timeout;
int ret;
u32 exp = 0;
timeout = jiffies + usecs_to_jiffies(admin_queue->completion_timeout);
while (1) {
spin_lock_irqsave(&admin_queue->q_lock, flags);
ena_com_handle_admin_completion(admin_queue);
spin_unlock_irqrestore(&admin_queue->q_lock, flags);
if (comp_ctx->status != ENA_CMD_SUBMITTED)
break;
if (time_is_before_jiffies(timeout)) {
netdev_err(admin_queue->ena_dev->net_device,
"Wait for completion (polling) timeout\n");
/* ENA didn't have any completion */
spin_lock_irqsave(&admin_queue->q_lock, flags);
admin_queue->stats.no_completion++;
admin_queue->running_state = false;
spin_unlock_irqrestore(&admin_queue->q_lock, flags);
ret = -ETIME;
goto err;
}
ena_delay_exponential_backoff_us(exp++,
admin_queue->ena_dev->ena_min_poll_delay_us);
}
if (unlikely(comp_ctx->status == ENA_CMD_ABORTED)) {
netdev_err(admin_queue->ena_dev->net_device,
"Command was aborted\n");
spin_lock_irqsave(&admin_queue->q_lock, flags);
admin_queue->stats.aborted_cmd++;
spin_unlock_irqrestore(&admin_queue->q_lock, flags);
ret = -ENODEV;
goto err;
}
WARN(comp_ctx->status != ENA_CMD_COMPLETED, "Invalid comp status %d\n",
comp_ctx->status);
ret = ena_com_comp_status_to_errno(admin_queue, comp_ctx->comp_status);
err:
comp_ctxt_release(admin_queue, comp_ctx);
return ret;
}
/*
* Set the LLQ configurations of the firmware
*
* The driver provides only the enabled feature values to the device,
* which in turn, checks if they are supported.
*/
static int ena_com_set_llq(struct ena_com_dev *ena_dev)
{
struct ena_com_admin_queue *admin_queue;
struct ena_admin_set_feat_cmd cmd;
struct ena_admin_set_feat_resp resp;
struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
int ret;
memset(&cmd, 0x0, sizeof(cmd));
admin_queue = &ena_dev->admin_queue;
cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
cmd.feat_common.feature_id = ENA_ADMIN_LLQ;
cmd.u.llq.header_location_ctrl_enabled = llq_info->header_location_ctrl;
cmd.u.llq.entry_size_ctrl_enabled = llq_info->desc_list_entry_size_ctrl;
cmd.u.llq.desc_num_before_header_enabled = llq_info->descs_num_before_header;
cmd.u.llq.descriptors_stride_ctrl_enabled = llq_info->desc_stride_ctrl;
cmd.u.llq.accel_mode.u.set.enabled_flags =
BIT(ENA_ADMIN_DISABLE_META_CACHING) |
BIT(ENA_ADMIN_LIMIT_TX_BURST);
ret = ena_com_execute_admin_command(admin_queue,
(struct ena_admin_aq_entry *)&cmd,
sizeof(cmd),
(struct ena_admin_acq_entry *)&resp,
sizeof(resp));
if (unlikely(ret))
netdev_err(ena_dev->net_device,
"Failed to set LLQ configurations: %d\n", ret);
return ret;
}
static int ena_com_config_llq_info(struct ena_com_dev *ena_dev,
struct ena_admin_feature_llq_desc *llq_features,
struct ena_llq_configurations *llq_default_cfg)
{
struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
struct ena_admin_accel_mode_get llq_accel_mode_get;
u16 supported_feat;
int rc;
memset(llq_info, 0, sizeof(*llq_info));
supported_feat = llq_features->header_location_ctrl_supported;
if (likely(supported_feat & llq_default_cfg->llq_header_location)) {
llq_info->header_location_ctrl =
llq_default_cfg->llq_header_location;
} else {
netdev_err(ena_dev->net_device,
"Invalid header location control, supported: 0x%x\n",
supported_feat);
return -EINVAL;
}
if (likely(llq_info->header_location_ctrl == ENA_ADMIN_INLINE_HEADER)) {
supported_feat = llq_features->descriptors_stride_ctrl_supported;
if (likely(supported_feat & llq_default_cfg->llq_stride_ctrl)) {
llq_info->desc_stride_ctrl = llq_default_cfg->llq_stride_ctrl;
} else {
if (supported_feat & ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY) {
llq_info->desc_stride_ctrl = ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY;
} else if (supported_feat & ENA_ADMIN_SINGLE_DESC_PER_ENTRY) {
llq_info->desc_stride_ctrl = ENA_ADMIN_SINGLE_DESC_PER_ENTRY;
} else {
netdev_err(ena_dev->net_device,
"Invalid desc_stride_ctrl, supported: 0x%x\n",
supported_feat);
return -EINVAL;
}
netdev_err(ena_dev->net_device,
"Default llq stride ctrl is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
llq_default_cfg->llq_stride_ctrl,
supported_feat, llq_info->desc_stride_ctrl);
}
} else {
llq_info->desc_stride_ctrl = 0;
}
supported_feat = llq_features->entry_size_ctrl_supported;
if (likely(supported_feat & llq_default_cfg->llq_ring_entry_size)) {
llq_info->desc_list_entry_size_ctrl = llq_default_cfg->llq_ring_entry_size;
llq_info->desc_list_entry_size = llq_default_cfg->llq_ring_entry_size_value;
} else {
if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_128B) {
llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_128B;
llq_info->desc_list_entry_size = 128;
} else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_192B) {
llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_192B;
llq_info->desc_list_entry_size = 192;
} else if (supported_feat & ENA_ADMIN_LIST_ENTRY_SIZE_256B) {
llq_info->desc_list_entry_size_ctrl = ENA_ADMIN_LIST_ENTRY_SIZE_256B;
llq_info->desc_list_entry_size = 256;
} else {
netdev_err(ena_dev->net_device,
"Invalid entry_size_ctrl, supported: 0x%x\n",
supported_feat);
return -EINVAL;
}
netdev_err(ena_dev->net_device,
"Default llq ring entry size is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
llq_default_cfg->llq_ring_entry_size, supported_feat,
llq_info->desc_list_entry_size);
}
if (unlikely(llq_info->desc_list_entry_size & 0x7)) {
/* The desc list entry size should be whole multiply of 8
* This requirement comes from __iowrite64_copy()
*/
netdev_err(ena_dev->net_device, "Illegal entry size %d\n",
llq_info->desc_list_entry_size);
return -EINVAL;
}
if (llq_info->desc_stride_ctrl == ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY)
llq_info->descs_per_entry = llq_info->desc_list_entry_size /
sizeof(struct ena_eth_io_tx_desc);
else
llq_info->descs_per_entry = 1;
supported_feat = llq_features->desc_num_before_header_supported;
if (likely(supported_feat & llq_default_cfg->llq_num_decs_before_header)) {
llq_info->descs_num_before_header = llq_default_cfg->llq_num_decs_before_header;
} else {
if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2) {
llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2;
} else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1) {
llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1;
} else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4) {
llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4;
} else if (supported_feat & ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8) {
llq_info->descs_num_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8;
} else {
netdev_err(ena_dev->net_device,
"Invalid descs_num_before_header, supported: 0x%x\n",
supported_feat);
return -EINVAL;
}
netdev_err(ena_dev->net_device,
"Default llq num descs before header is not supported, performing fallback, default: 0x%x, supported: 0x%x, used: 0x%x\n",
llq_default_cfg->llq_num_decs_before_header,
supported_feat, llq_info->descs_num_before_header);
}
/* Check for accelerated queue supported */
llq_accel_mode_get = llq_features->accel_mode.u.get;
llq_info->disable_meta_caching =
!!(llq_accel_mode_get.supported_flags &
BIT(ENA_ADMIN_DISABLE_META_CACHING));
if (llq_accel_mode_get.supported_flags & BIT(ENA_ADMIN_LIMIT_TX_BURST))
llq_info->max_entries_in_tx_burst =
llq_accel_mode_get.max_tx_burst_size /
llq_default_cfg->llq_ring_entry_size_value;
rc = ena_com_set_llq(ena_dev);
if (rc)
netdev_err(ena_dev->net_device,
"Cannot set LLQ configuration: %d\n", rc);
return rc;
}
static int ena_com_wait_and_process_admin_cq_interrupts(struct ena_comp_ctx *comp_ctx,
struct ena_com_admin_queue *admin_queue)
{
unsigned long flags = 0;
int ret;
wait_for_completion_timeout(&comp_ctx->wait_event,
usecs_to_jiffies(
admin_queue->completion_timeout));
/* In case the command wasn't completed find out the root cause.
* There might be 2 kinds of errors
* 1) No completion (timeout reached)
* 2) There is completion but the device didn't get any msi-x interrupt.
*/
if (unlikely(comp_ctx->status == ENA_CMD_SUBMITTED)) {
spin_lock_irqsave(&admin_queue->q_lock, flags);
ena_com_handle_admin_completion(admin_queue);
admin_queue->stats.no_completion++;
spin_unlock_irqrestore(&admin_queue->q_lock, flags);
if (comp_ctx->status == ENA_CMD_COMPLETED) {
netdev_err(admin_queue->ena_dev->net_device,
"The ena device sent a completion but the driver didn't receive a MSI-X interrupt (cmd %d), autopolling mode is %s\n",
comp_ctx->cmd_opcode,
admin_queue->auto_polling ? "ON" : "OFF");
/* Check if fallback to polling is enabled */
if (admin_queue->auto_polling)
admin_queue->polling = true;
} else {
netdev_err(admin_queue->ena_dev->net_device,
"The ena device didn't send a completion for the admin cmd %d status %d\n",
comp_ctx->cmd_opcode, comp_ctx->status);
}
/* Check if shifted to polling mode.
* This will happen if there is a completion without an interrupt
* and autopolling mode is enabled. Continuing normal execution in such case
*/
if (!admin_queue->polling) {
admin_queue->running_state = false;
ret = -ETIME;
goto err;
}
}
ret = ena_com_comp_status_to_errno(admin_queue, comp_ctx->comp_status);
err:
comp_ctxt_release(admin_queue, comp_ctx);
return ret;
}
/* This method read the hardware device register through posting writes
* and waiting for response
* On timeout the function will return ENA_MMIO_READ_TIMEOUT
*/
static u32 ena_com_reg_bar_read32(struct ena_com_dev *ena_dev, u16 offset)
{
struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
volatile struct ena_admin_ena_mmio_req_read_less_resp *read_resp =
mmio_read->read_resp;
u32 mmio_read_reg, ret, i;
unsigned long flags = 0;
u32 timeout = mmio_read->reg_read_to;
might_sleep();
if (timeout == 0)
timeout = ENA_REG_READ_TIMEOUT;
/* If readless is disabled, perform regular read */
if (!mmio_read->readless_supported)
return readl(ena_dev->reg_bar + offset);
spin_lock_irqsave(&mmio_read->lock, flags);
mmio_read->seq_num++;
read_resp->req_id = mmio_read->seq_num + 0xDEAD;
mmio_read_reg = (offset << ENA_REGS_MMIO_REG_READ_REG_OFF_SHIFT) &
ENA_REGS_MMIO_REG_READ_REG_OFF_MASK;
mmio_read_reg |= mmio_read->seq_num &
ENA_REGS_MMIO_REG_READ_REQ_ID_MASK;
writel(mmio_read_reg, ena_dev->reg_bar + ENA_REGS_MMIO_REG_READ_OFF);
for (i = 0; i < timeout; i++) {
if (READ_ONCE(read_resp->req_id) == mmio_read->seq_num)
break;
udelay(1);
}
if (unlikely(i == timeout)) {
netdev_err(ena_dev->net_device,
"Reading reg failed for timeout. expected: req id[%u] offset[%u] actual: req id[%u] offset[%u]\n",
mmio_read->seq_num, offset, read_resp->req_id,
read_resp->reg_off);
ret = ENA_MMIO_READ_TIMEOUT;
goto err;
}
if (read_resp->reg_off != offset) {
netdev_err(ena_dev->net_device,
"Read failure: wrong offset provided\n");
ret = ENA_MMIO_READ_TIMEOUT;
} else {
ret = read_resp->reg_val;
}
err:
spin_unlock_irqrestore(&mmio_read->lock, flags);
return ret;
}
/* There are two types to wait for completion.
* Polling mode - wait until the completion is available.
* Async mode - wait on wait queue until the completion is ready
* (or the timeout expired).
* It is expected that the IRQ called ena_com_handle_admin_completion
* to mark the completions.
*/
static int ena_com_wait_and_process_admin_cq(struct ena_comp_ctx *comp_ctx,
struct ena_com_admin_queue *admin_queue)
{
if (admin_queue->polling)
return ena_com_wait_and_process_admin_cq_polling(comp_ctx,
admin_queue);
return ena_com_wait_and_process_admin_cq_interrupts(comp_ctx,
admin_queue);
}
static int ena_com_destroy_io_sq(struct ena_com_dev *ena_dev,
struct ena_com_io_sq *io_sq)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
struct ena_admin_aq_destroy_sq_cmd destroy_cmd;
struct ena_admin_acq_destroy_sq_resp_desc destroy_resp;
u8 direction;
int ret;
memset(&destroy_cmd, 0x0, sizeof(destroy_cmd));
if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
direction = ENA_ADMIN_SQ_DIRECTION_TX;
else
direction = ENA_ADMIN_SQ_DIRECTION_RX;
destroy_cmd.sq.sq_identity |= (direction <<
ENA_ADMIN_SQ_SQ_DIRECTION_SHIFT) &
ENA_ADMIN_SQ_SQ_DIRECTION_MASK;
destroy_cmd.sq.sq_idx = io_sq->idx;
destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_SQ;
ret = ena_com_execute_admin_command(admin_queue,
(struct ena_admin_aq_entry *)&destroy_cmd,
sizeof(destroy_cmd),
(struct ena_admin_acq_entry *)&destroy_resp,
sizeof(destroy_resp));
if (unlikely(ret && (ret != -ENODEV)))
netdev_err(ena_dev->net_device,
"Failed to destroy io sq error: %d\n", ret);
return ret;
}
static void ena_com_io_queue_free(struct ena_com_dev *ena_dev,
struct ena_com_io_sq *io_sq,
struct ena_com_io_cq *io_cq)
{
size_t size;
if (io_cq->cdesc_addr.virt_addr) {
size = io_cq->cdesc_entry_size_in_bytes * io_cq->q_depth;
dma_free_coherent(ena_dev->dmadev, size,
io_cq->cdesc_addr.virt_addr,
io_cq->cdesc_addr.phys_addr);
io_cq->cdesc_addr.virt_addr = NULL;
}
if (io_sq->desc_addr.virt_addr) {
size = io_sq->desc_entry_size * io_sq->q_depth;
dma_free_coherent(ena_dev->dmadev, size,
io_sq->desc_addr.virt_addr,
io_sq->desc_addr.phys_addr);
io_sq->desc_addr.virt_addr = NULL;
}
if (io_sq->bounce_buf_ctrl.base_buffer) {
devm_kfree(ena_dev->dmadev, io_sq->bounce_buf_ctrl.base_buffer);
io_sq->bounce_buf_ctrl.base_buffer = NULL;
}
}
static int wait_for_reset_state(struct ena_com_dev *ena_dev, u32 timeout,
u16 exp_state)
{
u32 val, exp = 0;
unsigned long timeout_stamp;
/* Convert timeout from resolution of 100ms to us resolution. */
timeout_stamp = jiffies + usecs_to_jiffies(100 * 1000 * timeout);
while (1) {
val = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
if (unlikely(val == ENA_MMIO_READ_TIMEOUT)) {
netdev_err(ena_dev->net_device,
"Reg read timeout occurred\n");
return -ETIME;
}
if ((val & ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK) ==
exp_state)
return 0;
if (time_is_before_jiffies(timeout_stamp))
return -ETIME;
ena_delay_exponential_backoff_us(exp++, ena_dev->ena_min_poll_delay_us);
}
}
static bool ena_com_check_supported_feature_id(struct ena_com_dev *ena_dev,
enum ena_admin_aq_feature_id feature_id)
{
u32 feature_mask = 1 << feature_id;
/* Device attributes is always supported */
if ((feature_id != ENA_ADMIN_DEVICE_ATTRIBUTES) &&
!(ena_dev->supported_features & feature_mask))
return false;
return true;
}
static int ena_com_get_feature_ex(struct ena_com_dev *ena_dev,
struct ena_admin_get_feat_resp *get_resp,
enum ena_admin_aq_feature_id feature_id,
dma_addr_t control_buf_dma_addr,
u32 control_buff_size,
u8 feature_ver)
{
struct ena_com_admin_queue *admin_queue;
struct ena_admin_get_feat_cmd get_cmd;
int ret;
if (!ena_com_check_supported_feature_id(ena_dev, feature_id)) {
netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
feature_id);
return -EOPNOTSUPP;
}
memset(&get_cmd, 0x0, sizeof(get_cmd));
admin_queue = &ena_dev->admin_queue;
get_cmd.aq_common_descriptor.opcode = ENA_ADMIN_GET_FEATURE;
if (control_buff_size)
get_cmd.aq_common_descriptor.flags =
ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
else
get_cmd.aq_common_descriptor.flags = 0;
ret = ena_com_mem_addr_set(ena_dev,
&get_cmd.control_buffer.address,
control_buf_dma_addr);
if (unlikely(ret)) {
netdev_err(ena_dev->net_device, "Memory address set failed\n");
return ret;
}
get_cmd.control_buffer.length = control_buff_size;
get_cmd.feat_common.feature_version = feature_ver;
get_cmd.feat_common.feature_id = feature_id;
ret = ena_com_execute_admin_command(admin_queue,
(struct ena_admin_aq_entry *)
&get_cmd,
sizeof(get_cmd),
(struct ena_admin_acq_entry *)
get_resp,
sizeof(*get_resp));
if (unlikely(ret))
netdev_err(ena_dev->net_device,
"Failed to submit get_feature command %d error: %d\n",
feature_id, ret);
return ret;
}
static int ena_com_get_feature(struct ena_com_dev *ena_dev,
struct ena_admin_get_feat_resp *get_resp,
enum ena_admin_aq_feature_id feature_id,
u8 feature_ver)
{
return ena_com_get_feature_ex(ena_dev,
get_resp,
feature_id,
0,
0,
feature_ver);
}
int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev)
{
return ena_dev->rss.hash_func;
}
static void ena_com_hash_key_fill_default_key(struct ena_com_dev *ena_dev)
{
struct ena_admin_feature_rss_flow_hash_control *hash_key =
(ena_dev->rss).hash_key;
netdev_rss_key_fill(&hash_key->key, sizeof(hash_key->key));
/* The key buffer is stored in the device in an array of
* uint32 elements.
*/
hash_key->key_parts = ENA_ADMIN_RSS_KEY_PARTS;
}
static int ena_com_hash_key_allocate(struct ena_com_dev *ena_dev)
{
struct ena_rss *rss = &ena_dev->rss;
if (!ena_com_check_supported_feature_id(ena_dev,
ENA_ADMIN_RSS_HASH_FUNCTION))
return -EOPNOTSUPP;
rss->hash_key =
dma_alloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_key),
&rss->hash_key_dma_addr, GFP_KERNEL);
if (unlikely(!rss->hash_key))
return -ENOMEM;
return 0;
}
static void ena_com_hash_key_destroy(struct ena_com_dev *ena_dev)
{
struct ena_rss *rss = &ena_dev->rss;
if (rss->hash_key)
dma_free_coherent(ena_dev->dmadev, sizeof(*rss->hash_key),
rss->hash_key, rss->hash_key_dma_addr);
rss->hash_key = NULL;
}
static int ena_com_hash_ctrl_init(struct ena_com_dev *ena_dev)
{
struct ena_rss *rss = &ena_dev->rss;
rss->hash_ctrl =
dma_alloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_ctrl),
&rss->hash_ctrl_dma_addr, GFP_KERNEL);
if (unlikely(!rss->hash_ctrl))
return -ENOMEM;
return 0;
}
static void ena_com_hash_ctrl_destroy(struct ena_com_dev *ena_dev)
{
struct ena_rss *rss = &ena_dev->rss;
if (rss->hash_ctrl)
dma_free_coherent(ena_dev->dmadev, sizeof(*rss->hash_ctrl),
rss->hash_ctrl, rss->hash_ctrl_dma_addr);
rss->hash_ctrl = NULL;
}
static int ena_com_indirect_table_allocate(struct ena_com_dev *ena_dev,
u16 log_size)
{
struct ena_rss *rss = &ena_dev->rss;
struct ena_admin_get_feat_resp get_resp;
size_t tbl_size;
int ret;
ret = ena_com_get_feature(ena_dev, &get_resp,
ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG, 0);
if (unlikely(ret))
return ret;
if ((get_resp.u.ind_table.min_size > log_size) ||
(get_resp.u.ind_table.max_size < log_size)) {
netdev_err(ena_dev->net_device,
"Indirect table size doesn't fit. requested size: %d while min is:%d and max %d\n",
1 << log_size, 1 << get_resp.u.ind_table.min_size,
1 << get_resp.u.ind_table.max_size);
return -EINVAL;
}
tbl_size = (1ULL << log_size) *
sizeof(struct ena_admin_rss_ind_table_entry);
rss->rss_ind_tbl =
dma_alloc_coherent(ena_dev->dmadev, tbl_size,
&rss->rss_ind_tbl_dma_addr, GFP_KERNEL);
if (unlikely(!rss->rss_ind_tbl))
goto mem_err1;
tbl_size = (1ULL << log_size) * sizeof(u16);
rss->host_rss_ind_tbl =
devm_kzalloc(ena_dev->dmadev, tbl_size, GFP_KERNEL);
if (unlikely(!rss->host_rss_ind_tbl))
goto mem_err2;
rss->tbl_log_size = log_size;
return 0;
mem_err2:
tbl_size = (1ULL << log_size) *
sizeof(struct ena_admin_rss_ind_table_entry);
dma_free_coherent(ena_dev->dmadev, tbl_size, rss->rss_ind_tbl,
rss->rss_ind_tbl_dma_addr);
rss->rss_ind_tbl = NULL;
mem_err1:
rss->tbl_log_size = 0;
return -ENOMEM;
}
static void ena_com_indirect_table_destroy(struct ena_com_dev *ena_dev)
{
struct ena_rss *rss = &ena_dev->rss;
size_t tbl_size = (1ULL << rss->tbl_log_size) *
sizeof(struct ena_admin_rss_ind_table_entry);
if (rss->rss_ind_tbl)
dma_free_coherent(ena_dev->dmadev, tbl_size, rss->rss_ind_tbl,
rss->rss_ind_tbl_dma_addr);
rss->rss_ind_tbl = NULL;
if (rss->host_rss_ind_tbl)
devm_kfree(ena_dev->dmadev, rss->host_rss_ind_tbl);
rss->host_rss_ind_tbl = NULL;
}
static int ena_com_create_io_sq(struct ena_com_dev *ena_dev,
struct ena_com_io_sq *io_sq, u16 cq_idx)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
struct ena_admin_aq_create_sq_cmd create_cmd;
struct ena_admin_acq_create_sq_resp_desc cmd_completion;
u8 direction;
int ret;
memset(&create_cmd, 0x0, sizeof(create_cmd));
create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_SQ;
if (io_sq->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
direction = ENA_ADMIN_SQ_DIRECTION_TX;
else
direction = ENA_ADMIN_SQ_DIRECTION_RX;
create_cmd.sq_identity |= (direction <<
ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_SHIFT) &
ENA_ADMIN_AQ_CREATE_SQ_CMD_SQ_DIRECTION_MASK;
create_cmd.sq_caps_2 |= io_sq->mem_queue_type &
ENA_ADMIN_AQ_CREATE_SQ_CMD_PLACEMENT_POLICY_MASK;
create_cmd.sq_caps_2 |= (ENA_ADMIN_COMPLETION_POLICY_DESC <<
ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_SHIFT) &
ENA_ADMIN_AQ_CREATE_SQ_CMD_COMPLETION_POLICY_MASK;
create_cmd.sq_caps_3 |=
ENA_ADMIN_AQ_CREATE_SQ_CMD_IS_PHYSICALLY_CONTIGUOUS_MASK;
create_cmd.cq_idx = cq_idx;
create_cmd.sq_depth = io_sq->q_depth;
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST) {
ret = ena_com_mem_addr_set(ena_dev,
&create_cmd.sq_ba,
io_sq->desc_addr.phys_addr);
if (unlikely(ret)) {
netdev_err(ena_dev->net_device,
"Memory address set failed\n");
return ret;
}
}
ret = ena_com_execute_admin_command(admin_queue,
(struct ena_admin_aq_entry *)&create_cmd,
sizeof(create_cmd),
(struct ena_admin_acq_entry *)&cmd_completion,
sizeof(cmd_completion));
if (unlikely(ret)) {
netdev_err(ena_dev->net_device,
"Failed to create IO SQ. error: %d\n", ret);
return ret;
}
io_sq->idx = cmd_completion.sq_idx;
io_sq->db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
(uintptr_t)cmd_completion.sq_doorbell_offset);
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
io_sq->header_addr = (u8 __iomem *)((uintptr_t)ena_dev->mem_bar
+ cmd_completion.llq_headers_offset);
io_sq->desc_addr.pbuf_dev_addr =
(u8 __iomem *)((uintptr_t)ena_dev->mem_bar +
cmd_completion.llq_descriptors_offset);
}
netdev_dbg(ena_dev->net_device, "Created sq[%u], depth[%u]\n",
io_sq->idx, io_sq->q_depth);
return ret;
}
static int ena_com_ind_tbl_convert_to_device(struct ena_com_dev *ena_dev)
{
struct ena_rss *rss = &ena_dev->rss;
struct ena_com_io_sq *io_sq;
u16 qid;
int i;
for (i = 0; i < 1 << rss->tbl_log_size; i++) {
qid = rss->host_rss_ind_tbl[i];
if (qid >= ENA_TOTAL_NUM_QUEUES)
return -EINVAL;
io_sq = &ena_dev->io_sq_queues[qid];
if (io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX)
return -EINVAL;
rss->rss_ind_tbl[i].cq_idx = io_sq->idx;
}
return 0;
}
static void ena_com_update_intr_delay_resolution(struct ena_com_dev *ena_dev,
u16 intr_delay_resolution)
{
u16 prev_intr_delay_resolution = ena_dev->intr_delay_resolution;
if (unlikely(!intr_delay_resolution)) {
netdev_err(ena_dev->net_device,
"Illegal intr_delay_resolution provided. Going to use default 1 usec resolution\n");
intr_delay_resolution = ENA_DEFAULT_INTR_DELAY_RESOLUTION;
}
/* update Rx */
ena_dev->intr_moder_rx_interval =
ena_dev->intr_moder_rx_interval *
prev_intr_delay_resolution /
intr_delay_resolution;
/* update Tx */
ena_dev->intr_moder_tx_interval =
ena_dev->intr_moder_tx_interval *
prev_intr_delay_resolution /
intr_delay_resolution;
ena_dev->intr_delay_resolution = intr_delay_resolution;
}
/*****************************************************************************/
/******************************* API ******************************/
/*****************************************************************************/
int ena_com_execute_admin_command(struct ena_com_admin_queue *admin_queue,
struct ena_admin_aq_entry *cmd,
size_t cmd_size,
struct ena_admin_acq_entry *comp,
size_t comp_size)
{
struct ena_comp_ctx *comp_ctx;
int ret;
comp_ctx = ena_com_submit_admin_cmd(admin_queue, cmd, cmd_size,
comp, comp_size);
if (IS_ERR(comp_ctx)) {
ret = PTR_ERR(comp_ctx);
if (ret == -ENODEV)
netdev_dbg(admin_queue->ena_dev->net_device,
"Failed to submit command [%d]\n", ret);
else
netdev_err(admin_queue->ena_dev->net_device,
"Failed to submit command [%d]\n", ret);
return ret;
}
ret = ena_com_wait_and_process_admin_cq(comp_ctx, admin_queue);
if (unlikely(ret)) {
if (admin_queue->running_state)
netdev_err(admin_queue->ena_dev->net_device,
"Failed to process command. ret = %d\n", ret);
else
netdev_dbg(admin_queue->ena_dev->net_device,
"Failed to process command. ret = %d\n", ret);
}
return ret;
}
int ena_com_create_io_cq(struct ena_com_dev *ena_dev,
struct ena_com_io_cq *io_cq)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
struct ena_admin_aq_create_cq_cmd create_cmd;
struct ena_admin_acq_create_cq_resp_desc cmd_completion;
int ret;
memset(&create_cmd, 0x0, sizeof(create_cmd));
create_cmd.aq_common_descriptor.opcode = ENA_ADMIN_CREATE_CQ;
create_cmd.cq_caps_2 |= (io_cq->cdesc_entry_size_in_bytes / 4) &
ENA_ADMIN_AQ_CREATE_CQ_CMD_CQ_ENTRY_SIZE_WORDS_MASK;
create_cmd.cq_caps_1 |=
ENA_ADMIN_AQ_CREATE_CQ_CMD_INTERRUPT_MODE_ENABLED_MASK;
create_cmd.msix_vector = io_cq->msix_vector;
create_cmd.cq_depth = io_cq->q_depth;
ret = ena_com_mem_addr_set(ena_dev,
&create_cmd.cq_ba,
io_cq->cdesc_addr.phys_addr);
if (unlikely(ret)) {
netdev_err(ena_dev->net_device, "Memory address set failed\n");
return ret;
}
ret = ena_com_execute_admin_command(admin_queue,
(struct ena_admin_aq_entry *)&create_cmd,
sizeof(create_cmd),
(struct ena_admin_acq_entry *)&cmd_completion,
sizeof(cmd_completion));
if (unlikely(ret)) {
netdev_err(ena_dev->net_device,
"Failed to create IO CQ. error: %d\n", ret);
return ret;
}
io_cq->idx = cmd_completion.cq_idx;
io_cq->unmask_reg = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
cmd_completion.cq_interrupt_unmask_register_offset);
if (cmd_completion.cq_head_db_register_offset)
io_cq->cq_head_db_reg =
(u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
cmd_completion.cq_head_db_register_offset);
if (cmd_completion.numa_node_register_offset)
io_cq->numa_node_cfg_reg =
(u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
cmd_completion.numa_node_register_offset);
netdev_dbg(ena_dev->net_device, "Created cq[%u], depth[%u]\n",
io_cq->idx, io_cq->q_depth);
return ret;
}
int ena_com_get_io_handlers(struct ena_com_dev *ena_dev, u16 qid,
struct ena_com_io_sq **io_sq,
struct ena_com_io_cq **io_cq)
{
if (qid >= ENA_TOTAL_NUM_QUEUES) {
netdev_err(ena_dev->net_device,
"Invalid queue number %d but the max is %d\n", qid,
ENA_TOTAL_NUM_QUEUES);
return -EINVAL;
}
*io_sq = &ena_dev->io_sq_queues[qid];
*io_cq = &ena_dev->io_cq_queues[qid];
return 0;
}
void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
struct ena_comp_ctx *comp_ctx;
u16 i;
if (!admin_queue->comp_ctx)
return;
for (i = 0; i < admin_queue->q_depth; i++) {
comp_ctx = get_comp_ctxt(admin_queue, i, false);
if (unlikely(!comp_ctx))
break;
comp_ctx->status = ENA_CMD_ABORTED;
complete(&comp_ctx->wait_event);
}
}
void ena_com_wait_for_abort_completion(struct ena_com_dev *ena_dev)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
unsigned long flags = 0;
u32 exp = 0;
spin_lock_irqsave(&admin_queue->q_lock, flags);
while (atomic_read(&admin_queue->outstanding_cmds) != 0) {
spin_unlock_irqrestore(&admin_queue->q_lock, flags);
ena_delay_exponential_backoff_us(exp++,
ena_dev->ena_min_poll_delay_us);
spin_lock_irqsave(&admin_queue->q_lock, flags);
}
spin_unlock_irqrestore(&admin_queue->q_lock, flags);
}
int ena_com_destroy_io_cq(struct ena_com_dev *ena_dev,
struct ena_com_io_cq *io_cq)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
struct ena_admin_aq_destroy_cq_cmd destroy_cmd;
struct ena_admin_acq_destroy_cq_resp_desc destroy_resp;
int ret;
memset(&destroy_cmd, 0x0, sizeof(destroy_cmd));
destroy_cmd.cq_idx = io_cq->idx;
destroy_cmd.aq_common_descriptor.opcode = ENA_ADMIN_DESTROY_CQ;
ret = ena_com_execute_admin_command(admin_queue,
(struct ena_admin_aq_entry *)&destroy_cmd,
sizeof(destroy_cmd),
(struct ena_admin_acq_entry *)&destroy_resp,
sizeof(destroy_resp));
if (unlikely(ret && (ret != -ENODEV)))
netdev_err(ena_dev->net_device,
"Failed to destroy IO CQ. error: %d\n", ret);
return ret;
}
bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev)
{
return ena_dev->admin_queue.running_state;
}
void ena_com_set_admin_running_state(struct ena_com_dev *ena_dev, bool state)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
unsigned long flags = 0;
spin_lock_irqsave(&admin_queue->q_lock, flags);
ena_dev->admin_queue.running_state = state;
spin_unlock_irqrestore(&admin_queue->q_lock, flags);
}
void ena_com_admin_aenq_enable(struct ena_com_dev *ena_dev)
{
u16 depth = ena_dev->aenq.q_depth;
WARN(ena_dev->aenq.head != depth, "Invalid AENQ state\n");
/* Init head_db to mark that all entries in the queue
* are initially available
*/
writel(depth, ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF);
}
int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag)
{
struct ena_com_admin_queue *admin_queue;
struct ena_admin_set_feat_cmd cmd;
struct ena_admin_set_feat_resp resp;
struct ena_admin_get_feat_resp get_resp;
int ret;
ret = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_AENQ_CONFIG, 0);
if (ret) {
dev_info(ena_dev->dmadev, "Can't get aenq configuration\n");
return ret;
}
if ((get_resp.u.aenq.supported_groups & groups_flag) != groups_flag) {
netdev_warn(ena_dev->net_device,
"Trying to set unsupported aenq events. supported flag: 0x%x asked flag: 0x%x\n",
get_resp.u.aenq.supported_groups, groups_flag);
return -EOPNOTSUPP;
}
memset(&cmd, 0x0, sizeof(cmd));
admin_queue = &ena_dev->admin_queue;
cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
cmd.aq_common_descriptor.flags = 0;
cmd.feat_common.feature_id = ENA_ADMIN_AENQ_CONFIG;
cmd.u.aenq.enabled_groups = groups_flag;
ret = ena_com_execute_admin_command(admin_queue,
(struct ena_admin_aq_entry *)&cmd,
sizeof(cmd),
(struct ena_admin_acq_entry *)&resp,
sizeof(resp));
if (unlikely(ret))
netdev_err(ena_dev->net_device,
"Failed to config AENQ ret: %d\n", ret);
return ret;
}
int ena_com_get_dma_width(struct ena_com_dev *ena_dev)
{
u32 caps = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
u32 width;
if (unlikely(caps == ENA_MMIO_READ_TIMEOUT)) {
netdev_err(ena_dev->net_device, "Reg read timeout occurred\n");
return -ETIME;
}
width = (caps & ENA_REGS_CAPS_DMA_ADDR_WIDTH_MASK) >>
ENA_REGS_CAPS_DMA_ADDR_WIDTH_SHIFT;
netdev_dbg(ena_dev->net_device, "ENA dma width: %d\n", width);
if ((width < 32) || width > ENA_MAX_PHYS_ADDR_SIZE_BITS) {
netdev_err(ena_dev->net_device, "DMA width illegal value: %d\n",
width);
return -EINVAL;
}
ena_dev->dma_addr_bits = width;
return width;
}
int ena_com_validate_version(struct ena_com_dev *ena_dev)
{
u32 ver;
u32 ctrl_ver;
u32 ctrl_ver_masked;
/* Make sure the ENA version and the controller version are at least
* as the driver expects
*/
ver = ena_com_reg_bar_read32(ena_dev, ENA_REGS_VERSION_OFF);
ctrl_ver = ena_com_reg_bar_read32(ena_dev,
ENA_REGS_CONTROLLER_VERSION_OFF);
if (unlikely((ver == ENA_MMIO_READ_TIMEOUT) ||
(ctrl_ver == ENA_MMIO_READ_TIMEOUT))) {
netdev_err(ena_dev->net_device, "Reg read timeout occurred\n");
return -ETIME;
}
dev_info(ena_dev->dmadev, "ENA device version: %d.%d\n",
(ver & ENA_REGS_VERSION_MAJOR_VERSION_MASK) >>
ENA_REGS_VERSION_MAJOR_VERSION_SHIFT,
ver & ENA_REGS_VERSION_MINOR_VERSION_MASK);
dev_info(ena_dev->dmadev,
"ENA controller version: %d.%d.%d implementation version %d\n",
(ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) >>
ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_SHIFT,
(ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) >>
ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_SHIFT,
(ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK),
(ctrl_ver & ENA_REGS_CONTROLLER_VERSION_IMPL_ID_MASK) >>
ENA_REGS_CONTROLLER_VERSION_IMPL_ID_SHIFT);
ctrl_ver_masked =
(ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MAJOR_VERSION_MASK) |
(ctrl_ver & ENA_REGS_CONTROLLER_VERSION_MINOR_VERSION_MASK) |
(ctrl_ver & ENA_REGS_CONTROLLER_VERSION_SUBMINOR_VERSION_MASK);
/* Validate the ctrl version without the implementation ID */
if (ctrl_ver_masked < MIN_ENA_CTRL_VER) {
netdev_err(ena_dev->net_device,
"ENA ctrl version is lower than the minimal ctrl version the driver supports\n");
return -1;
}
return 0;
}
static void
ena_com_free_ena_admin_queue_comp_ctx(struct ena_com_dev *ena_dev,
struct ena_com_admin_queue *admin_queue)
{
if (!admin_queue->comp_ctx)
return;
devm_kfree(ena_dev->dmadev, admin_queue->comp_ctx);
admin_queue->comp_ctx = NULL;
}
void ena_com_admin_destroy(struct ena_com_dev *ena_dev)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
struct ena_com_admin_cq *cq = &admin_queue->cq;
struct ena_com_admin_sq *sq = &admin_queue->sq;
struct ena_com_aenq *aenq = &ena_dev->aenq;
u16 size;
ena_com_free_ena_admin_queue_comp_ctx(ena_dev, admin_queue);
size = ADMIN_SQ_SIZE(admin_queue->q_depth);
if (sq->entries)
dma_free_coherent(ena_dev->dmadev, size, sq->entries,
sq->dma_addr);
sq->entries = NULL;
size = ADMIN_CQ_SIZE(admin_queue->q_depth);
if (cq->entries)
dma_free_coherent(ena_dev->dmadev, size, cq->entries,
cq->dma_addr);
cq->entries = NULL;
size = ADMIN_AENQ_SIZE(aenq->q_depth);
if (ena_dev->aenq.entries)
dma_free_coherent(ena_dev->dmadev, size, aenq->entries,
aenq->dma_addr);
aenq->entries = NULL;
}
void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling)
{
u32 mask_value = 0;
if (polling)
mask_value = ENA_REGS_ADMIN_INTR_MASK;
writel(mask_value, ena_dev->reg_bar + ENA_REGS_INTR_MASK_OFF);
ena_dev->admin_queue.polling = polling;
}
void ena_com_set_admin_auto_polling_mode(struct ena_com_dev *ena_dev,
bool polling)
{
ena_dev->admin_queue.auto_polling = polling;
}
int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev)
{
struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
spin_lock_init(&mmio_read->lock);
mmio_read->read_resp =
dma_alloc_coherent(ena_dev->dmadev,
sizeof(*mmio_read->read_resp),
&mmio_read->read_resp_dma_addr, GFP_KERNEL);
if (unlikely(!mmio_read->read_resp))
goto err;
ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
mmio_read->read_resp->req_id = 0x0;
mmio_read->seq_num = 0x0;
mmio_read->readless_supported = true;
return 0;
err:
return -ENOMEM;
}
void ena_com_set_mmio_read_mode(struct ena_com_dev *ena_dev, bool readless_supported)
{
struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
mmio_read->readless_supported = readless_supported;
}
void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev)
{
struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
writel(0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF);
writel(0x0, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF);
dma_free_coherent(ena_dev->dmadev, sizeof(*mmio_read->read_resp),
mmio_read->read_resp, mmio_read->read_resp_dma_addr);
mmio_read->read_resp = NULL;
}
void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev)
{
struct ena_com_mmio_read *mmio_read = &ena_dev->mmio_read;
u32 addr_low, addr_high;
addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(mmio_read->read_resp_dma_addr);
addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(mmio_read->read_resp_dma_addr);
writel(addr_low, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_LO_OFF);
writel(addr_high, ena_dev->reg_bar + ENA_REGS_MMIO_RESP_HI_OFF);
}
int ena_com_admin_init(struct ena_com_dev *ena_dev,
struct ena_aenq_handlers *aenq_handlers)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
u32 aq_caps, acq_caps, dev_sts, addr_low, addr_high;
int ret;
dev_sts = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
if (unlikely(dev_sts == ENA_MMIO_READ_TIMEOUT)) {
netdev_err(ena_dev->net_device, "Reg read timeout occurred\n");
return -ETIME;
}
if (!(dev_sts & ENA_REGS_DEV_STS_READY_MASK)) {
netdev_err(ena_dev->net_device,
"Device isn't ready, abort com init\n");
return -ENODEV;
}
admin_queue->q_depth = ENA_ADMIN_QUEUE_DEPTH;
admin_queue->q_dmadev = ena_dev->dmadev;
admin_queue->polling = false;
admin_queue->curr_cmd_id = 0;
atomic_set(&admin_queue->outstanding_cmds, 0);
spin_lock_init(&admin_queue->q_lock);
ret = ena_com_init_comp_ctxt(admin_queue);
if (ret)
goto error;
ret = ena_com_admin_init_sq(admin_queue);
if (ret)
goto error;
ret = ena_com_admin_init_cq(admin_queue);
if (ret)
goto error;
admin_queue->sq.db_addr = (u32 __iomem *)((uintptr_t)ena_dev->reg_bar +
ENA_REGS_AQ_DB_OFF);
addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->sq.dma_addr);
addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->sq.dma_addr);
writel(addr_low, ena_dev->reg_bar + ENA_REGS_AQ_BASE_LO_OFF);
writel(addr_high, ena_dev->reg_bar + ENA_REGS_AQ_BASE_HI_OFF);
addr_low = ENA_DMA_ADDR_TO_UINT32_LOW(admin_queue->cq.dma_addr);
addr_high = ENA_DMA_ADDR_TO_UINT32_HIGH(admin_queue->cq.dma_addr);
writel(addr_low, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_LO_OFF);
writel(addr_high, ena_dev->reg_bar + ENA_REGS_ACQ_BASE_HI_OFF);
aq_caps = 0;
aq_caps |= admin_queue->q_depth & ENA_REGS_AQ_CAPS_AQ_DEPTH_MASK;
aq_caps |= (sizeof(struct ena_admin_aq_entry) <<
ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_SHIFT) &
ENA_REGS_AQ_CAPS_AQ_ENTRY_SIZE_MASK;
acq_caps = 0;
acq_caps |= admin_queue->q_depth & ENA_REGS_ACQ_CAPS_ACQ_DEPTH_MASK;
acq_caps |= (sizeof(struct ena_admin_acq_entry) <<
ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_SHIFT) &
ENA_REGS_ACQ_CAPS_ACQ_ENTRY_SIZE_MASK;
writel(aq_caps, ena_dev->reg_bar + ENA_REGS_AQ_CAPS_OFF);
writel(acq_caps, ena_dev->reg_bar + ENA_REGS_ACQ_CAPS_OFF);
ret = ena_com_admin_init_aenq(ena_dev, aenq_handlers);
if (ret)
goto error;
admin_queue->ena_dev = ena_dev;
admin_queue->running_state = true;
return 0;
error:
ena_com_admin_destroy(ena_dev);
return ret;
}
int ena_com_create_io_queue(struct ena_com_dev *ena_dev,
struct ena_com_create_io_ctx *ctx)
{
struct ena_com_io_sq *io_sq;
struct ena_com_io_cq *io_cq;
int ret;
if (ctx->qid >= ENA_TOTAL_NUM_QUEUES) {
netdev_err(ena_dev->net_device,
"Qid (%d) is bigger than max num of queues (%d)\n",
ctx->qid, ENA_TOTAL_NUM_QUEUES);
return -EINVAL;
}
io_sq = &ena_dev->io_sq_queues[ctx->qid];
io_cq = &ena_dev->io_cq_queues[ctx->qid];
memset(io_sq, 0x0, sizeof(*io_sq));
memset(io_cq, 0x0, sizeof(*io_cq));
/* Init CQ */
io_cq->q_depth = ctx->queue_size;
io_cq->direction = ctx->direction;
io_cq->qid = ctx->qid;
io_cq->msix_vector = ctx->msix_vector;
io_sq->q_depth = ctx->queue_size;
io_sq->direction = ctx->direction;
io_sq->qid = ctx->qid;
io_sq->mem_queue_type = ctx->mem_queue_type;
if (ctx->direction == ENA_COM_IO_QUEUE_DIRECTION_TX)
/* header length is limited to 8 bits */
io_sq->tx_max_header_size =
min_t(u32, ena_dev->tx_max_header_size, SZ_256);
ret = ena_com_init_io_sq(ena_dev, ctx, io_sq);
if (ret)
goto error;
ret = ena_com_init_io_cq(ena_dev, ctx, io_cq);
if (ret)
goto error;
ret = ena_com_create_io_cq(ena_dev, io_cq);
if (ret)
goto error;
ret = ena_com_create_io_sq(ena_dev, io_sq, io_cq->idx);
if (ret)
goto destroy_io_cq;
return 0;
destroy_io_cq:
ena_com_destroy_io_cq(ena_dev, io_cq);
error:
ena_com_io_queue_free(ena_dev, io_sq, io_cq);
return ret;
}
void ena_com_destroy_io_queue(struct ena_com_dev *ena_dev, u16 qid)
{
struct ena_com_io_sq *io_sq;
struct ena_com_io_cq *io_cq;
if (qid >= ENA_TOTAL_NUM_QUEUES) {
netdev_err(ena_dev->net_device,
"Qid (%d) is bigger than max num of queues (%d)\n",
qid, ENA_TOTAL_NUM_QUEUES);
return;
}
io_sq = &ena_dev->io_sq_queues[qid];
io_cq = &ena_dev->io_cq_queues[qid];
ena_com_destroy_io_sq(ena_dev, io_sq);
ena_com_destroy_io_cq(ena_dev, io_cq);
ena_com_io_queue_free(ena_dev, io_sq, io_cq);
}
int ena_com_get_link_params(struct ena_com_dev *ena_dev,
struct ena_admin_get_feat_resp *resp)
{
return ena_com_get_feature(ena_dev, resp, ENA_ADMIN_LINK_CONFIG, 0);
}
int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
struct ena_com_dev_get_features_ctx *get_feat_ctx)
{
struct ena_admin_get_feat_resp get_resp;
int rc;
rc = ena_com_get_feature(ena_dev, &get_resp,
ENA_ADMIN_DEVICE_ATTRIBUTES, 0);
if (rc)
return rc;
memcpy(&get_feat_ctx->dev_attr, &get_resp.u.dev_attr,
sizeof(get_resp.u.dev_attr));
ena_dev->supported_features = get_resp.u.dev_attr.supported_features;
ena_dev->capabilities = get_resp.u.dev_attr.capabilities;
if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
rc = ena_com_get_feature(ena_dev, &get_resp,
ENA_ADMIN_MAX_QUEUES_EXT,
ENA_FEATURE_MAX_QUEUE_EXT_VER);
if (rc)
return rc;
if (get_resp.u.max_queue_ext.version !=
ENA_FEATURE_MAX_QUEUE_EXT_VER)
return -EINVAL;
memcpy(&get_feat_ctx->max_queue_ext, &get_resp.u.max_queue_ext,
sizeof(get_resp.u.max_queue_ext));
ena_dev->tx_max_header_size =
get_resp.u.max_queue_ext.max_queue_ext.max_tx_header_size;
} else {
rc = ena_com_get_feature(ena_dev, &get_resp,
ENA_ADMIN_MAX_QUEUES_NUM, 0);
memcpy(&get_feat_ctx->max_queues, &get_resp.u.max_queue,
sizeof(get_resp.u.max_queue));
ena_dev->tx_max_header_size =
get_resp.u.max_queue.max_header_size;
if (rc)
return rc;
}
rc = ena_com_get_feature(ena_dev, &get_resp,
ENA_ADMIN_AENQ_CONFIG, 0);
if (rc)
return rc;
memcpy(&get_feat_ctx->aenq, &get_resp.u.aenq,
sizeof(get_resp.u.aenq));
rc = ena_com_get_feature(ena_dev, &get_resp,
ENA_ADMIN_STATELESS_OFFLOAD_CONFIG, 0);
if (rc)
return rc;
memcpy(&get_feat_ctx->offload, &get_resp.u.offload,
sizeof(get_resp.u.offload));
/* Driver hints isn't mandatory admin command. So in case the
* command isn't supported set driver hints to 0
*/
rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_HW_HINTS, 0);
if (!rc)
memcpy(&get_feat_ctx->hw_hints, &get_resp.u.hw_hints,
sizeof(get_resp.u.hw_hints));
else if (rc == -EOPNOTSUPP)
memset(&get_feat_ctx->hw_hints, 0x0,
sizeof(get_feat_ctx->hw_hints));
else
return rc;
rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_LLQ, 0);
if (!rc)
memcpy(&get_feat_ctx->llq, &get_resp.u.llq,
sizeof(get_resp.u.llq));
else if (rc == -EOPNOTSUPP)
memset(&get_feat_ctx->llq, 0x0, sizeof(get_feat_ctx->llq));
else
return rc;
return 0;
}
void ena_com_admin_q_comp_intr_handler(struct ena_com_dev *ena_dev)
{
ena_com_handle_admin_completion(&ena_dev->admin_queue);
}
/* ena_handle_specific_aenq_event:
* return the handler that is relevant to the specific event group
*/
static ena_aenq_handler ena_com_get_specific_aenq_cb(struct ena_com_dev *ena_dev,
u16 group)
{
struct ena_aenq_handlers *aenq_handlers = ena_dev->aenq.aenq_handlers;
if ((group < ENA_MAX_HANDLERS) && aenq_handlers->handlers[group])
return aenq_handlers->handlers[group];
return aenq_handlers->unimplemented_handler;
}
/* ena_aenq_intr_handler:
* handles the aenq incoming events.
* pop events from the queue and apply the specific handler
*/
void ena_com_aenq_intr_handler(struct ena_com_dev *ena_dev, void *data)
{
struct ena_admin_aenq_entry *aenq_e;
struct ena_admin_aenq_common_desc *aenq_common;
struct ena_com_aenq *aenq = &ena_dev->aenq;
u64 timestamp;
ena_aenq_handler handler_cb;
u16 masked_head, processed = 0;
u8 phase;
masked_head = aenq->head & (aenq->q_depth - 1);
phase = aenq->phase;
aenq_e = &aenq->entries[masked_head]; /* Get first entry */
aenq_common = &aenq_e->aenq_common_desc;
/* Go over all the events */
while ((READ_ONCE(aenq_common->flags) &
ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK) == phase) {
/* Make sure the phase bit (ownership) is as expected before
* reading the rest of the descriptor.
*/
dma_rmb();
timestamp = (u64)aenq_common->timestamp_low |
((u64)aenq_common->timestamp_high << 32);
netdev_dbg(ena_dev->net_device,
"AENQ! Group[%x] Syndrome[%x] timestamp: [%llus]\n",
aenq_common->group, aenq_common->syndrome, timestamp);
/* Handle specific event*/
handler_cb = ena_com_get_specific_aenq_cb(ena_dev,
aenq_common->group);
handler_cb(data, aenq_e); /* call the actual event handler*/
/* Get next event entry */
masked_head++;
processed++;
if (unlikely(masked_head == aenq->q_depth)) {
masked_head = 0;
phase = !phase;
}
aenq_e = &aenq->entries[masked_head];
aenq_common = &aenq_e->aenq_common_desc;
}
aenq->head += processed;
aenq->phase = phase;
/* Don't update aenq doorbell if there weren't any processed events */
if (!processed)
return;
/* write the aenq doorbell after all AENQ descriptors were read */
mb();
writel_relaxed((u32)aenq->head,
ena_dev->reg_bar + ENA_REGS_AENQ_HEAD_DB_OFF);
}
int ena_com_dev_reset(struct ena_com_dev *ena_dev,
enum ena_regs_reset_reason_types reset_reason)
{
u32 stat, timeout, cap, reset_val;
int rc;
stat = ena_com_reg_bar_read32(ena_dev, ENA_REGS_DEV_STS_OFF);
cap = ena_com_reg_bar_read32(ena_dev, ENA_REGS_CAPS_OFF);
if (unlikely((stat == ENA_MMIO_READ_TIMEOUT) ||
(cap == ENA_MMIO_READ_TIMEOUT))) {
netdev_err(ena_dev->net_device, "Reg read32 timeout occurred\n");
return -ETIME;
}
if ((stat & ENA_REGS_DEV_STS_READY_MASK) == 0) {
netdev_err(ena_dev->net_device,
"Device isn't ready, can't reset device\n");
return -EINVAL;
}
timeout = (cap & ENA_REGS_CAPS_RESET_TIMEOUT_MASK) >>
ENA_REGS_CAPS_RESET_TIMEOUT_SHIFT;
if (timeout == 0) {
netdev_err(ena_dev->net_device, "Invalid timeout value\n");
return -EINVAL;
}
/* start reset */
reset_val = ENA_REGS_DEV_CTL_DEV_RESET_MASK;
reset_val |= (reset_reason << ENA_REGS_DEV_CTL_RESET_REASON_SHIFT) &
ENA_REGS_DEV_CTL_RESET_REASON_MASK;
writel(reset_val, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF);
/* Write again the MMIO read request address */
ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
rc = wait_for_reset_state(ena_dev, timeout,
ENA_REGS_DEV_STS_RESET_IN_PROGRESS_MASK);
if (rc != 0) {
netdev_err(ena_dev->net_device,
"Reset indication didn't turn on\n");
return rc;
}
/* reset done */
writel(0, ena_dev->reg_bar + ENA_REGS_DEV_CTL_OFF);
rc = wait_for_reset_state(ena_dev, timeout, 0);
if (rc != 0) {
netdev_err(ena_dev->net_device,
"Reset indication didn't turn off\n");
return rc;
}
timeout = (cap & ENA_REGS_CAPS_ADMIN_CMD_TO_MASK) >>
ENA_REGS_CAPS_ADMIN_CMD_TO_SHIFT;
if (timeout)
/* the resolution of timeout reg is 100ms */
ena_dev->admin_queue.completion_timeout = timeout * 100000;
else
ena_dev->admin_queue.completion_timeout = ADMIN_CMD_TIMEOUT_US;
return 0;
}
static int ena_get_dev_stats(struct ena_com_dev *ena_dev,
struct ena_com_stats_ctx *ctx,
enum ena_admin_get_stats_type type)
{
struct ena_admin_aq_get_stats_cmd *get_cmd = &ctx->get_cmd;
struct ena_admin_acq_get_stats_resp *get_resp = &ctx->get_resp;
struct ena_com_admin_queue *admin_queue;
int ret;
admin_queue = &ena_dev->admin_queue;
get_cmd->aq_common_descriptor.opcode = ENA_ADMIN_GET_STATS;
get_cmd->aq_common_descriptor.flags = 0;
get_cmd->type = type;
ret = ena_com_execute_admin_command(admin_queue,
(struct ena_admin_aq_entry *)get_cmd,
sizeof(*get_cmd),
(struct ena_admin_acq_entry *)get_resp,
sizeof(*get_resp));
if (unlikely(ret))
netdev_err(ena_dev->net_device,
"Failed to get stats. error: %d\n", ret);
return ret;
}
int ena_com_get_eni_stats(struct ena_com_dev *ena_dev,
struct ena_admin_eni_stats *stats)
{
struct ena_com_stats_ctx ctx;
int ret;
if (!ena_com_get_cap(ena_dev, ENA_ADMIN_ENI_STATS)) {
netdev_err(ena_dev->net_device,
"Capability %d isn't supported\n",
ENA_ADMIN_ENI_STATS);
return -EOPNOTSUPP;
}
memset(&ctx, 0x0, sizeof(ctx));
ret = ena_get_dev_stats(ena_dev, &ctx, ENA_ADMIN_GET_STATS_TYPE_ENI);
if (likely(ret == 0))
memcpy(stats, &ctx.get_resp.u.eni_stats,
sizeof(ctx.get_resp.u.eni_stats));
return ret;
}
int ena_com_get_dev_basic_stats(struct ena_com_dev *ena_dev,
struct ena_admin_basic_stats *stats)
{
struct ena_com_stats_ctx ctx;
int ret;
memset(&ctx, 0x0, sizeof(ctx));
ret = ena_get_dev_stats(ena_dev, &ctx, ENA_ADMIN_GET_STATS_TYPE_BASIC);
if (likely(ret == 0))
memcpy(stats, &ctx.get_resp.u.basic_stats,
sizeof(ctx.get_resp.u.basic_stats));
return ret;
}
int ena_com_set_dev_mtu(struct ena_com_dev *ena_dev, u32 mtu)
{
struct ena_com_admin_queue *admin_queue;
struct ena_admin_set_feat_cmd cmd;
struct ena_admin_set_feat_resp resp;
int ret;
if (!ena_com_check_supported_feature_id(ena_dev, ENA_ADMIN_MTU)) {
netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
ENA_ADMIN_MTU);
return -EOPNOTSUPP;
}
memset(&cmd, 0x0, sizeof(cmd));
admin_queue = &ena_dev->admin_queue;
cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
cmd.aq_common_descriptor.flags = 0;
cmd.feat_common.feature_id = ENA_ADMIN_MTU;
cmd.u.mtu.mtu = mtu;
ret = ena_com_execute_admin_command(admin_queue,
(struct ena_admin_aq_entry *)&cmd,
sizeof(cmd),
(struct ena_admin_acq_entry *)&resp,
sizeof(resp));
if (unlikely(ret))
netdev_err(ena_dev->net_device,
"Failed to set mtu %d. error: %d\n", mtu, ret);
return ret;
}
int ena_com_get_offload_settings(struct ena_com_dev *ena_dev,
struct ena_admin_feature_offload_desc *offload)
{
int ret;
struct ena_admin_get_feat_resp resp;
ret = ena_com_get_feature(ena_dev, &resp,
ENA_ADMIN_STATELESS_OFFLOAD_CONFIG, 0);
if (unlikely(ret)) {
netdev_err(ena_dev->net_device,
"Failed to get offload capabilities %d\n", ret);
return ret;
}
memcpy(offload, &resp.u.offload, sizeof(resp.u.offload));
return 0;
}
int ena_com_set_hash_function(struct ena_com_dev *ena_dev)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
struct ena_rss *rss = &ena_dev->rss;
struct ena_admin_set_feat_cmd cmd;
struct ena_admin_set_feat_resp resp;
struct ena_admin_get_feat_resp get_resp;
int ret;
if (!ena_com_check_supported_feature_id(ena_dev,
ENA_ADMIN_RSS_HASH_FUNCTION)) {
netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
ENA_ADMIN_RSS_HASH_FUNCTION);
return -EOPNOTSUPP;
}
/* Validate hash function is supported */
ret = ena_com_get_feature(ena_dev, &get_resp,
ENA_ADMIN_RSS_HASH_FUNCTION, 0);
if (unlikely(ret))
return ret;
if (!(get_resp.u.flow_hash_func.supported_func & BIT(rss->hash_func))) {
netdev_err(ena_dev->net_device,
"Func hash %d isn't supported by device, abort\n",
rss->hash_func);
return -EOPNOTSUPP;
}
memset(&cmd, 0x0, sizeof(cmd));
cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
cmd.aq_common_descriptor.flags =
ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_FUNCTION;
cmd.u.flow_hash_func.init_val = rss->hash_init_val;
cmd.u.flow_hash_func.selected_func = 1 << rss->hash_func;
ret = ena_com_mem_addr_set(ena_dev,
&cmd.control_buffer.address,
rss->hash_key_dma_addr);
if (unlikely(ret)) {
netdev_err(ena_dev->net_device, "Memory address set failed\n");
return ret;
}
cmd.control_buffer.length = sizeof(*rss->hash_key);
ret = ena_com_execute_admin_command(admin_queue,
(struct ena_admin_aq_entry *)&cmd,
sizeof(cmd),
(struct ena_admin_acq_entry *)&resp,
sizeof(resp));
if (unlikely(ret)) {
netdev_err(ena_dev->net_device,
"Failed to set hash function %d. error: %d\n",
rss->hash_func, ret);
return -EINVAL;
}
return 0;
}
int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
enum ena_admin_hash_functions func,
const u8 *key, u16 key_len, u32 init_val)
{
struct ena_admin_feature_rss_flow_hash_control *hash_key;
struct ena_admin_get_feat_resp get_resp;
enum ena_admin_hash_functions old_func;
struct ena_rss *rss = &ena_dev->rss;
int rc;
hash_key = rss->hash_key;
/* Make sure size is a mult of DWs */
if (unlikely(key_len & 0x3))
return -EINVAL;
rc = ena_com_get_feature_ex(ena_dev, &get_resp,
ENA_ADMIN_RSS_HASH_FUNCTION,
rss->hash_key_dma_addr,
sizeof(*rss->hash_key), 0);
if (unlikely(rc))
return rc;
if (!(BIT(func) & get_resp.u.flow_hash_func.supported_func)) {
netdev_err(ena_dev->net_device,
"Flow hash function %d isn't supported\n", func);
return -EOPNOTSUPP;
}
if ((func == ENA_ADMIN_TOEPLITZ) && key) {
if (key_len != sizeof(hash_key->key)) {
netdev_err(ena_dev->net_device,
"key len (%u) doesn't equal the supported size (%zu)\n",
key_len, sizeof(hash_key->key));
return -EINVAL;
}
memcpy(hash_key->key, key, key_len);
hash_key->key_parts = key_len / sizeof(hash_key->key[0]);
}
rss->hash_init_val = init_val;
old_func = rss->hash_func;
rss->hash_func = func;
rc = ena_com_set_hash_function(ena_dev);
/* Restore the old function */
if (unlikely(rc))
rss->hash_func = old_func;
return rc;
}
int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
enum ena_admin_hash_functions *func)
{
struct ena_rss *rss = &ena_dev->rss;
struct ena_admin_get_feat_resp get_resp;
int rc;
if (unlikely(!func))
return -EINVAL;
rc = ena_com_get_feature_ex(ena_dev, &get_resp,
ENA_ADMIN_RSS_HASH_FUNCTION,
rss->hash_key_dma_addr,
sizeof(*rss->hash_key), 0);
if (unlikely(rc))
return rc;
/* ffs() returns 1 in case the lsb is set */
rss->hash_func = ffs(get_resp.u.flow_hash_func.selected_func);
if (rss->hash_func)
rss->hash_func--;
*func = rss->hash_func;
return 0;
}
int ena_com_get_hash_key(struct ena_com_dev *ena_dev, u8 *key)
{
struct ena_admin_feature_rss_flow_hash_control *hash_key =
ena_dev->rss.hash_key;
if (key)
memcpy(key, hash_key->key,
(size_t)(hash_key->key_parts) * sizeof(hash_key->key[0]));
return 0;
}
int ena_com_get_hash_ctrl(struct ena_com_dev *ena_dev,
enum ena_admin_flow_hash_proto proto,
u16 *fields)
{
struct ena_rss *rss = &ena_dev->rss;
struct ena_admin_get_feat_resp get_resp;
int rc;
rc = ena_com_get_feature_ex(ena_dev, &get_resp,
ENA_ADMIN_RSS_HASH_INPUT,
rss->hash_ctrl_dma_addr,
sizeof(*rss->hash_ctrl), 0);
if (unlikely(rc))
return rc;
if (fields)
*fields = rss->hash_ctrl->selected_fields[proto].fields;
return 0;
}
int ena_com_set_hash_ctrl(struct ena_com_dev *ena_dev)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
struct ena_rss *rss = &ena_dev->rss;
struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl;
struct ena_admin_set_feat_cmd cmd;
struct ena_admin_set_feat_resp resp;
int ret;
if (!ena_com_check_supported_feature_id(ena_dev,
ENA_ADMIN_RSS_HASH_INPUT)) {
netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
ENA_ADMIN_RSS_HASH_INPUT);
return -EOPNOTSUPP;
}
memset(&cmd, 0x0, sizeof(cmd));
cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
cmd.aq_common_descriptor.flags =
ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
cmd.feat_common.feature_id = ENA_ADMIN_RSS_HASH_INPUT;
cmd.u.flow_hash_input.enabled_input_sort =
ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L3_SORT_MASK |
ENA_ADMIN_FEATURE_RSS_FLOW_HASH_INPUT_L4_SORT_MASK;
ret = ena_com_mem_addr_set(ena_dev,
&cmd.control_buffer.address,
rss->hash_ctrl_dma_addr);
if (unlikely(ret)) {
netdev_err(ena_dev->net_device, "Memory address set failed\n");
return ret;
}
cmd.control_buffer.length = sizeof(*hash_ctrl);
ret = ena_com_execute_admin_command(admin_queue,
(struct ena_admin_aq_entry *)&cmd,
sizeof(cmd),
(struct ena_admin_acq_entry *)&resp,
sizeof(resp));
if (unlikely(ret))
netdev_err(ena_dev->net_device,
"Failed to set hash input. error: %d\n", ret);
return ret;
}
int ena_com_set_default_hash_ctrl(struct ena_com_dev *ena_dev)
{
struct ena_rss *rss = &ena_dev->rss;
struct ena_admin_feature_rss_hash_control *hash_ctrl =
rss->hash_ctrl;
u16 available_fields = 0;
int rc, i;
/* Get the supported hash input */
rc = ena_com_get_hash_ctrl(ena_dev, 0, NULL);
if (unlikely(rc))
return rc;
hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP4].fields =
ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP4].fields =
ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
hash_ctrl->selected_fields[ENA_ADMIN_RSS_TCP6].fields =
ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
hash_ctrl->selected_fields[ENA_ADMIN_RSS_UDP6].fields =
ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA |
ENA_ADMIN_RSS_L4_DP | ENA_ADMIN_RSS_L4_SP;
hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4].fields =
ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP6].fields =
ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
hash_ctrl->selected_fields[ENA_ADMIN_RSS_IP4_FRAG].fields =
ENA_ADMIN_RSS_L3_SA | ENA_ADMIN_RSS_L3_DA;
hash_ctrl->selected_fields[ENA_ADMIN_RSS_NOT_IP].fields =
ENA_ADMIN_RSS_L2_DA | ENA_ADMIN_RSS_L2_SA;
for (i = 0; i < ENA_ADMIN_RSS_PROTO_NUM; i++) {
available_fields = hash_ctrl->selected_fields[i].fields &
hash_ctrl->supported_fields[i].fields;
if (available_fields != hash_ctrl->selected_fields[i].fields) {
netdev_err(ena_dev->net_device,
"Hash control doesn't support all the desire configuration. proto %x supported %x selected %x\n",
i, hash_ctrl->supported_fields[i].fields,
hash_ctrl->selected_fields[i].fields);
return -EOPNOTSUPP;
}
}
rc = ena_com_set_hash_ctrl(ena_dev);
/* In case of failure, restore the old hash ctrl */
if (unlikely(rc))
ena_com_get_hash_ctrl(ena_dev, 0, NULL);
return rc;
}
int ena_com_fill_hash_ctrl(struct ena_com_dev *ena_dev,
enum ena_admin_flow_hash_proto proto,
u16 hash_fields)
{
struct ena_rss *rss = &ena_dev->rss;
struct ena_admin_feature_rss_hash_control *hash_ctrl = rss->hash_ctrl;
u16 supported_fields;
int rc;
if (proto >= ENA_ADMIN_RSS_PROTO_NUM) {
netdev_err(ena_dev->net_device, "Invalid proto num (%u)\n",
proto);
return -EINVAL;
}
/* Get the ctrl table */
rc = ena_com_get_hash_ctrl(ena_dev, proto, NULL);
if (unlikely(rc))
return rc;
/* Make sure all the fields are supported */
supported_fields = hash_ctrl->supported_fields[proto].fields;
if ((hash_fields & supported_fields) != hash_fields) {
netdev_err(ena_dev->net_device,
"Proto %d doesn't support the required fields %x. supports only: %x\n",
proto, hash_fields, supported_fields);
}
hash_ctrl->selected_fields[proto].fields = hash_fields;
rc = ena_com_set_hash_ctrl(ena_dev);
/* In case of failure, restore the old hash ctrl */
if (unlikely(rc))
ena_com_get_hash_ctrl(ena_dev, 0, NULL);
return 0;
}
int ena_com_indirect_table_fill_entry(struct ena_com_dev *ena_dev,
u16 entry_idx, u16 entry_value)
{
struct ena_rss *rss = &ena_dev->rss;
if (unlikely(entry_idx >= (1 << rss->tbl_log_size)))
return -EINVAL;
if (unlikely((entry_value > ENA_TOTAL_NUM_QUEUES)))
return -EINVAL;
rss->host_rss_ind_tbl[entry_idx] = entry_value;
return 0;
}
int ena_com_indirect_table_set(struct ena_com_dev *ena_dev)
{
struct ena_com_admin_queue *admin_queue = &ena_dev->admin_queue;
struct ena_rss *rss = &ena_dev->rss;
struct ena_admin_set_feat_cmd cmd;
struct ena_admin_set_feat_resp resp;
int ret;
if (!ena_com_check_supported_feature_id(
ena_dev, ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG)) {
netdev_dbg(ena_dev->net_device, "Feature %d isn't supported\n",
ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG);
return -EOPNOTSUPP;
}
ret = ena_com_ind_tbl_convert_to_device(ena_dev);
if (ret) {
netdev_err(ena_dev->net_device,
"Failed to convert host indirection table to device table\n");
return ret;
}
memset(&cmd, 0x0, sizeof(cmd));
cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
cmd.aq_common_descriptor.flags =
ENA_ADMIN_AQ_COMMON_DESC_CTRL_DATA_INDIRECT_MASK;
cmd.feat_common.feature_id = ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG;
cmd.u.ind_table.size = rss->tbl_log_size;
cmd.u.ind_table.inline_index = 0xFFFFFFFF;
ret = ena_com_mem_addr_set(ena_dev,
&cmd.control_buffer.address,
rss->rss_ind_tbl_dma_addr);
if (unlikely(ret)) {
netdev_err(ena_dev->net_device, "Memory address set failed\n");
return ret;
}
cmd.control_buffer.length = (1ULL << rss->tbl_log_size) *
sizeof(struct ena_admin_rss_ind_table_entry);
ret = ena_com_execute_admin_command(admin_queue,
(struct ena_admin_aq_entry *)&cmd,
sizeof(cmd),
(struct ena_admin_acq_entry *)&resp,
sizeof(resp));
if (unlikely(ret))
netdev_err(ena_dev->net_device,
"Failed to set indirect table. error: %d\n", ret);
return ret;
}
int ena_com_indirect_table_get(struct ena_com_dev *ena_dev, u32 *ind_tbl)
{
struct ena_rss *rss = &ena_dev->rss;
struct ena_admin_get_feat_resp get_resp;
u32 tbl_size;
int i, rc;
tbl_size = (1ULL << rss->tbl_log_size) *
sizeof(struct ena_admin_rss_ind_table_entry);
rc = ena_com_get_feature_ex(ena_dev, &get_resp,
ENA_ADMIN_RSS_INDIRECTION_TABLE_CONFIG,
rss->rss_ind_tbl_dma_addr,
tbl_size, 0);
if (unlikely(rc))
return rc;
if (!ind_tbl)
return 0;
for (i = 0; i < (1 << rss->tbl_log_size); i++)
ind_tbl[i] = rss->host_rss_ind_tbl[i];
return 0;
}
int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 indr_tbl_log_size)
{
int rc;
memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
rc = ena_com_indirect_table_allocate(ena_dev, indr_tbl_log_size);
if (unlikely(rc))
goto err_indr_tbl;
/* The following function might return unsupported in case the
* device doesn't support setting the key / hash function. We can safely
* ignore this error and have indirection table support only.
*/
rc = ena_com_hash_key_allocate(ena_dev);
if (likely(!rc))
ena_com_hash_key_fill_default_key(ena_dev);
else if (rc != -EOPNOTSUPP)
goto err_hash_key;
rc = ena_com_hash_ctrl_init(ena_dev);
if (unlikely(rc))
goto err_hash_ctrl;
return 0;
err_hash_ctrl:
ena_com_hash_key_destroy(ena_dev);
err_hash_key:
ena_com_indirect_table_destroy(ena_dev);
err_indr_tbl:
return rc;
}
void ena_com_rss_destroy(struct ena_com_dev *ena_dev)
{
ena_com_indirect_table_destroy(ena_dev);
ena_com_hash_key_destroy(ena_dev);
ena_com_hash_ctrl_destroy(ena_dev);
memset(&ena_dev->rss, 0x0, sizeof(ena_dev->rss));
}
int ena_com_allocate_host_info(struct ena_com_dev *ena_dev)
{
struct ena_host_attribute *host_attr = &ena_dev->host_attr;
host_attr->host_info =
dma_alloc_coherent(ena_dev->dmadev, SZ_4K,
&host_attr->host_info_dma_addr, GFP_KERNEL);
if (unlikely(!host_attr->host_info))
return -ENOMEM;
host_attr->host_info->ena_spec_version = ((ENA_COMMON_SPEC_VERSION_MAJOR <<
ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) |
(ENA_COMMON_SPEC_VERSION_MINOR));
return 0;
}
int ena_com_allocate_debug_area(struct ena_com_dev *ena_dev,
u32 debug_area_size)
{
struct ena_host_attribute *host_attr = &ena_dev->host_attr;
host_attr->debug_area_virt_addr =
dma_alloc_coherent(ena_dev->dmadev, debug_area_size,
&host_attr->debug_area_dma_addr, GFP_KERNEL);
if (unlikely(!host_attr->debug_area_virt_addr)) {
host_attr->debug_area_size = 0;
return -ENOMEM;
}
host_attr->debug_area_size = debug_area_size;
return 0;
}
void ena_com_delete_host_info(struct ena_com_dev *ena_dev)
{
struct ena_host_attribute *host_attr = &ena_dev->host_attr;
if (host_attr->host_info) {
dma_free_coherent(ena_dev->dmadev, SZ_4K, host_attr->host_info,
host_attr->host_info_dma_addr);
host_attr->host_info = NULL;
}
}
void ena_com_delete_debug_area(struct ena_com_dev *ena_dev)
{
struct ena_host_attribute *host_attr = &ena_dev->host_attr;
if (host_attr->debug_area_virt_addr) {
dma_free_coherent(ena_dev->dmadev, host_attr->debug_area_size,
host_attr->debug_area_virt_addr,
host_attr->debug_area_dma_addr);
host_attr->debug_area_virt_addr = NULL;
}
}
int ena_com_set_host_attributes(struct ena_com_dev *ena_dev)
{
struct ena_host_attribute *host_attr = &ena_dev->host_attr;
struct ena_com_admin_queue *admin_queue;
struct ena_admin_set_feat_cmd cmd;
struct ena_admin_set_feat_resp resp;
int ret;
/* Host attribute config is called before ena_com_get_dev_attr_feat
* so ena_com can't check if the feature is supported.
*/
memset(&cmd, 0x0, sizeof(cmd));
admin_queue = &ena_dev->admin_queue;
cmd.aq_common_descriptor.opcode = ENA_ADMIN_SET_FEATURE;
cmd.feat_common.feature_id = ENA_ADMIN_HOST_ATTR_CONFIG;
ret = ena_com_mem_addr_set(ena_dev,
&cmd.u.host_attr.debug_ba,
host_attr->debug_area_dma_addr);
if (unlikely(ret)) {
netdev_err(ena_dev->net_device, "Memory address set failed\n");
return ret;
}
ret = ena_com_mem_addr_set(ena_dev,
&cmd.u.host_attr.os_info_ba,
host_attr->host_info_dma_addr);
if (unlikely(ret)) {
netdev_err(ena_dev->net_device, "Memory address set failed\n");
return ret;
}
cmd.u.host_attr.debug_area_size = host_attr->debug_area_size;
ret = ena_com_execute_admin_command(admin_queue,
(struct ena_admin_aq_entry *)&cmd,
sizeof(cmd),
(struct ena_admin_acq_entry *)&resp,
sizeof(resp));
if (unlikely(ret))
netdev_err(ena_dev->net_device,
"Failed to set host attributes: %d\n", ret);
return ret;
}
/* Interrupt moderation */
bool ena_com_interrupt_moderation_supported(struct ena_com_dev *ena_dev)
{
return ena_com_check_supported_feature_id(ena_dev,
ENA_ADMIN_INTERRUPT_MODERATION);
}
static int ena_com_update_nonadaptive_moderation_interval(struct ena_com_dev *ena_dev,
u32 coalesce_usecs,
u32 intr_delay_resolution,
u32 *intr_moder_interval)
{
if (!intr_delay_resolution) {
netdev_err(ena_dev->net_device,
"Illegal interrupt delay granularity value\n");
return -EFAULT;
}
*intr_moder_interval = coalesce_usecs / intr_delay_resolution;
return 0;
}
int ena_com_update_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev,
u32 tx_coalesce_usecs)
{
return ena_com_update_nonadaptive_moderation_interval(ena_dev,
tx_coalesce_usecs,
ena_dev->intr_delay_resolution,
&ena_dev->intr_moder_tx_interval);
}
int ena_com_update_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev,
u32 rx_coalesce_usecs)
{
return ena_com_update_nonadaptive_moderation_interval(ena_dev,
rx_coalesce_usecs,
ena_dev->intr_delay_resolution,
&ena_dev->intr_moder_rx_interval);
}
int ena_com_init_interrupt_moderation(struct ena_com_dev *ena_dev)
{
struct ena_admin_get_feat_resp get_resp;
u16 delay_resolution;
int rc;
rc = ena_com_get_feature(ena_dev, &get_resp,
ENA_ADMIN_INTERRUPT_MODERATION, 0);
if (rc) {
if (rc == -EOPNOTSUPP) {
netdev_dbg(ena_dev->net_device,
"Feature %d isn't supported\n",
ENA_ADMIN_INTERRUPT_MODERATION);
rc = 0;
} else {
netdev_err(ena_dev->net_device,
"Failed to get interrupt moderation admin cmd. rc: %d\n",
rc);
}
/* no moderation supported, disable adaptive support */
ena_com_disable_adaptive_moderation(ena_dev);
return rc;
}
/* if moderation is supported by device we set adaptive moderation */
delay_resolution = get_resp.u.intr_moderation.intr_delay_resolution;
ena_com_update_intr_delay_resolution(ena_dev, delay_resolution);
/* Disable adaptive moderation by default - can be enabled later */
ena_com_disable_adaptive_moderation(ena_dev);
return 0;
}
unsigned int ena_com_get_nonadaptive_moderation_interval_tx(struct ena_com_dev *ena_dev)
{
return ena_dev->intr_moder_tx_interval;
}
unsigned int ena_com_get_nonadaptive_moderation_interval_rx(struct ena_com_dev *ena_dev)
{
return ena_dev->intr_moder_rx_interval;
}
int ena_com_config_dev_mode(struct ena_com_dev *ena_dev,
struct ena_admin_feature_llq_desc *llq_features,
struct ena_llq_configurations *llq_default_cfg)
{
struct ena_com_llq_info *llq_info = &ena_dev->llq_info;
int rc;
if (!llq_features->max_llq_num) {
ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
return 0;
}
rc = ena_com_config_llq_info(ena_dev, llq_features, llq_default_cfg);
if (rc)
return rc;
ena_dev->tx_max_header_size = llq_info->desc_list_entry_size -
(llq_info->descs_num_before_header * sizeof(struct ena_eth_io_tx_desc));
if (unlikely(ena_dev->tx_max_header_size == 0)) {
netdev_err(ena_dev->net_device,
"The size of the LLQ entry is smaller than needed\n");
return -EINVAL;
}
ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
return 0;
}