iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'ena-next'

Browse Source 
Arthur Kiyanovski says:

====================
Improving performance and reducing latencies, by using latest capabilities exposed in ENA device

This patchset introduces the following:
1. A new placement policy of Tx headers and descriptors, which takes
advantage of an option to place headers + descriptors in device memory
space. This is sometimes referred to as LLQ - low latency queue.
The patch set defines the admin capability, maps the device memory as
write-combined, and adds a mode in transmit datapath to do header +
descriptor placement on the device.
2. Support for RX checksum offloading
3. Miscelaneous small improvements and code cleanups

Note: V1 of this patchset was created as if patches e2a322a 248ab77
from net were applied to net-next before applying the patchset. This V2
version does not assume this, and should be applyed directly on net-next
without the aformentioned patches.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-10-11 10:13:52 -07:00
commit 1f41dc5e87
11 changed files with 1339 additions and 747 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

189
drivers/net/ethernet/amazon/ena/ena_admin_defs.h
View File

@ -32,71 +32,49 @@
#ifndef _ENA_ADMIN_H_
#define _ENA_ADMIN_H_
enum ena_admin_aq_opcode {
ENA_ADMIN_CREATE_SQ = 1,
ENA_ADMIN_DESTROY_SQ = 2,
ENA_ADMIN_CREATE_CQ = 3,
ENA_ADMIN_DESTROY_CQ = 4,
ENA_ADMIN_GET_FEATURE = 8,
ENA_ADMIN_SET_FEATURE = 9,
ENA_ADMIN_GET_STATS = 11,
};
enum ena_admin_aq_completion_status {
ENA_ADMIN_SUCCESS = 0,
ENA_ADMIN_RESOURCE_ALLOCATION_FAILURE = 1,
ENA_ADMIN_BAD_OPCODE = 2,
ENA_ADMIN_UNSUPPORTED_OPCODE = 3,
ENA_ADMIN_MALFORMED_REQUEST = 4,
/* Additional status is provided in ACQ entry extended_status */
ENA_ADMIN_ILLEGAL_PARAMETER = 5,
ENA_ADMIN_UNKNOWN_ERROR = 6,
ENA_ADMIN_RESOURCE_BUSY = 7,
};
enum ena_admin_aq_feature_id {
ENA_ADMIN_DEVICE_ATTRIBUTES = 1,
ENA_ADMIN_MAX_QUEUES_NUM = 2,
ENA_ADMIN_HW_HINTS = 3,
ENA_ADMIN_LLQ = 4,
ENA_ADMIN_RSS_HASH_FUNCTION = 10,
ENA_ADMIN_STATELESS_OFFLOAD_CONFIG = 11,
ENA_ADMIN_RSS_REDIRECTION_TABLE_CONFIG = 12,
ENA_ADMIN_MTU = 14,
ENA_ADMIN_RSS_HASH_INPUT = 18,
ENA_ADMIN_INTERRUPT_MODERATION = 20,
ENA_ADMIN_AENQ_CONFIG = 26,
ENA_ADMIN_LINK_CONFIG = 27,
ENA_ADMIN_HOST_ATTR_CONFIG = 28,
ENA_ADMIN_FEATURES_OPCODE_NUM = 32,
};
enum ena_admin_placement_policy_type {
/* descriptors and headers are in host memory */
ENA_ADMIN_PLACEMENT_POLICY_HOST = 1,
/* descriptors and headers are in device memory (a.k.a Low Latency
* Queue)
*/
@ -105,38 +83,26 @@ enum ena_admin_placement_policy_type {
enum ena_admin_link_types {
ENA_ADMIN_LINK_SPEED_1G = 0x1,
ENA_ADMIN_LINK_SPEED_2_HALF_G = 0x2,
ENA_ADMIN_LINK_SPEED_5G = 0x4,
ENA_ADMIN_LINK_SPEED_10G = 0x8,
ENA_ADMIN_LINK_SPEED_25G = 0x10,
ENA_ADMIN_LINK_SPEED_40G = 0x20,
ENA_ADMIN_LINK_SPEED_50G = 0x40,
ENA_ADMIN_LINK_SPEED_100G = 0x80,
ENA_ADMIN_LINK_SPEED_200G = 0x100,
ENA_ADMIN_LINK_SPEED_400G = 0x200,
};
enum ena_admin_completion_policy_type {
/* completion queue entry for each sq descriptor */
ENA_ADMIN_COMPLETION_POLICY_DESC = 0,
/* completion queue entry upon request in sq descriptor */
ENA_ADMIN_COMPLETION_POLICY_DESC_ON_DEMAND = 1,
/* current queue head pointer is updated in OS memory upon sq
* descriptor request
*/
ENA_ADMIN_COMPLETION_POLICY_HEAD_ON_DEMAND = 2,
/* current queue head pointer is updated in OS memory for each sq
* descriptor
*/
@ -149,13 +115,11 @@ enum ena_admin_completion_policy_type {
*/
enum ena_admin_get_stats_type {
ENA_ADMIN_GET_STATS_TYPE_BASIC = 0,
ENA_ADMIN_GET_STATS_TYPE_EXTENDED = 1,
};
enum ena_admin_get_stats_scope {
ENA_ADMIN_SPECIFIC_QUEUE = 0,
ENA_ADMIN_ETH_TRAFFIC = 1,
};
@ -227,7 +191,9 @@ struct ena_admin_acq_common_desc {
u16 extended_status;
/* serves as a hint what AQ entries can be revoked */
/* indicates to the driver which AQ entry has been consumed by the
* device and could be reused
*/
u16 sq_head_indx;
};
@ -297,7 +263,6 @@ struct ena_admin_aq_create_sq_cmd {
enum ena_admin_sq_direction {
ENA_ADMIN_SQ_DIRECTION_TX = 1,
ENA_ADMIN_SQ_DIRECTION_RX = 2,
};
@ -483,8 +448,85 @@ struct ena_admin_device_attr_feature_desc {
u32 max_mtu;
};
enum ena_admin_llq_header_location {
/* header is in descriptor list */
ENA_ADMIN_INLINE_HEADER = 1,
/* header in a separate ring, implies 16B descriptor list entry */
ENA_ADMIN_HEADER_RING = 2,
};
enum ena_admin_llq_ring_entry_size {
ENA_ADMIN_LIST_ENTRY_SIZE_128B = 1,
ENA_ADMIN_LIST_ENTRY_SIZE_192B = 2,
ENA_ADMIN_LIST_ENTRY_SIZE_256B = 4,
};
enum ena_admin_llq_num_descs_before_header {
ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_0 = 0,
ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_1 = 1,
ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2 = 2,
ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_4 = 4,
ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_8 = 8,
};
/* packet descriptor list entry always starts with one or more descriptors,
* followed by a header. The rest of the descriptors are located in the
* beginning of the subsequent entry. Stride refers to how the rest of the
* descriptors are placed. This field is relevant only for inline header
* mode
*/
enum ena_admin_llq_stride_ctrl {
ENA_ADMIN_SINGLE_DESC_PER_ENTRY = 1,
ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY = 2,
};
struct ena_admin_feature_llq_desc {
u32 max_llq_num;
u32 max_llq_depth;
/* specify the header locations the device supports. bitfield of
* enum ena_admin_llq_header_location.
*/
u16 header_location_ctrl_supported;
/* the header location the driver selected to use. */
u16 header_location_ctrl_enabled;
/* if inline header is specified - this is the size of descriptor
* list entry. If header in a separate ring is specified - this is
* the size of header ring entry. bitfield of enum
* ena_admin_llq_ring_entry_size. specify the entry sizes the device
* supports
*/
u16 entry_size_ctrl_supported;
/* the entry size the driver selected to use. */
u16 entry_size_ctrl_enabled;
/* valid only if inline header is specified. First entry associated
* with the packet includes descriptors and header. Rest of the
* entries occupied by descriptors. This parameter defines the max
* number of descriptors precedding the header in the first entry.
* The field is bitfield of enum
* ena_admin_llq_num_descs_before_header and specify the values the
* device supports
*/
u16 desc_num_before_header_supported;
/* the desire field the driver selected to use */
u16 desc_num_before_header_enabled;
/* valid only if inline was chosen. bitfield of enum
* ena_admin_llq_stride_ctrl
*/
u16 descriptors_stride_ctrl_supported;
/* the stride control the driver selected to use */
u16 descriptors_stride_ctrl_enabled;
};
struct ena_admin_queue_feature_desc {
/* including LLQs */
u32 max_sq_num;
u32 max_sq_depth;
@ -493,9 +535,9 @@ struct ena_admin_queue_feature_desc {
u32 max_cq_depth;
u32 max_llq_num;
u32 max_legacy_llq_num;
u32 max_llq_depth;
u32 max_legacy_llq_depth;
u32 max_header_size;
@ -584,7 +626,6 @@ struct ena_admin_feature_offload_desc {
enum ena_admin_hash_functions {
ENA_ADMIN_TOEPLITZ = 1,
ENA_ADMIN_CRC32 = 2,
};
@ -612,27 +653,17 @@ struct ena_admin_feature_rss_flow_hash_function {
/* RSS flow hash protocols */
enum ena_admin_flow_hash_proto {
ENA_ADMIN_RSS_TCP4 = 0,
ENA_ADMIN_RSS_UDP4 = 1,
ENA_ADMIN_RSS_TCP6 = 2,
ENA_ADMIN_RSS_UDP6 = 3,
ENA_ADMIN_RSS_IP4 = 4,
ENA_ADMIN_RSS_IP6 = 5,
ENA_ADMIN_RSS_IP4_FRAG = 6,
ENA_ADMIN_RSS_NOT_IP = 7,
/* TCPv6 with extension header */
ENA_ADMIN_RSS_TCP6_EX = 8,
/* IPv6 with extension header */
ENA_ADMIN_RSS_IP6_EX = 9,
ENA_ADMIN_RSS_PROTO_NUM = 16,
};
@ -640,19 +671,14 @@ enum ena_admin_flow_hash_proto {
enum ena_admin_flow_hash_fields {
/* Ethernet Dest Addr */
ENA_ADMIN_RSS_L2_DA = BIT(0),
/* Ethernet Src Addr */
ENA_ADMIN_RSS_L2_SA = BIT(1),
/* ipv4/6 Dest Addr */
ENA_ADMIN_RSS_L3_DA = BIT(2),
/* ipv4/6 Src Addr */
ENA_ADMIN_RSS_L3_SA = BIT(3),
/* tcp/udp Dest Port */
ENA_ADMIN_RSS_L4_DP = BIT(4),
/* tcp/udp Src Port */
ENA_ADMIN_RSS_L4_SP = BIT(5),
};
@ -694,14 +720,12 @@ struct ena_admin_feature_rss_flow_hash_input {
enum ena_admin_os_type {
ENA_ADMIN_OS_LINUX = 1,
ENA_ADMIN_OS_WIN = 2,
ENA_ADMIN_OS_DPDK = 3,
ENA_ADMIN_OS_FREEBSD = 4,
ENA_ADMIN_OS_IPXE = 5,
ENA_ADMIN_OS_ESXI = 6,
ENA_ADMIN_OS_GROUPS_NUM = 6,
};
struct ena_admin_host_info {
@ -723,11 +747,27 @@ struct ena_admin_host_info {
/* 7:0 : major
* 15:8 : minor
* 23:16 : sub_minor
* 31:24 : module_type
*/
u32 driver_version;
/* features bitmap */
u32 supported_network_features[4];
u32 supported_network_features[2];
/* ENA spec version of driver */
u16 ena_spec_version;
/* ENA device's Bus, Device and Function
* 2:0 : function
* 7:3 : device
* 15:8 : bus
*/
u16 bdf;
/* Number of CPUs */
u16 num_cpus;
u16 reserved;
};
struct ena_admin_rss_ind_table_entry {
@ -800,6 +840,8 @@ struct ena_admin_get_feat_resp {
struct ena_admin_device_attr_feature_desc dev_attr;
struct ena_admin_feature_llq_desc llq;
struct ena_admin_queue_feature_desc max_queue;
struct ena_admin_feature_aenq_desc aenq;
@ -847,6 +889,9 @@ struct ena_admin_set_feat_cmd {
/* rss indirection table */
struct ena_admin_feature_rss_ind_table ind_table;
/* LLQ configuration */
struct ena_admin_feature_llq_desc llq;
} u;
};
@ -876,23 +921,16 @@ struct ena_admin_aenq_common_desc {
/* asynchronous event notification groups */
enum ena_admin_aenq_group {
ENA_ADMIN_LINK_CHANGE = 0,
ENA_ADMIN_FATAL_ERROR = 1,
ENA_ADMIN_WARNING = 2,
ENA_ADMIN_NOTIFICATION = 3,
ENA_ADMIN_KEEP_ALIVE = 4,
ENA_ADMIN_AENQ_GROUPS_NUM = 5,
};
enum ena_admin_aenq_notification_syndrom {
ENA_ADMIN_SUSPEND = 0,
ENA_ADMIN_RESUME = 1,
ENA_ADMIN_UPDATE_HINTS = 2,
};
@ -1008,6 +1046,13 @@ struct ena_admin_ena_mmio_req_read_less_resp {
#define ENA_ADMIN_HOST_INFO_MINOR_MASK GENMASK(15, 8)
#define ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT 16
#define ENA_ADMIN_HOST_INFO_SUB_MINOR_MASK GENMASK(23, 16)
#define ENA_ADMIN_HOST_INFO_MODULE_TYPE_SHIFT 24
#define ENA_ADMIN_HOST_INFO_MODULE_TYPE_MASK GENMASK(31, 24)
#define ENA_ADMIN_HOST_INFO_FUNCTION_MASK GENMASK(2, 0)
#define ENA_ADMIN_HOST_INFO_DEVICE_SHIFT 3
#define ENA_ADMIN_HOST_INFO_DEVICE_MASK GENMASK(7, 3)
#define ENA_ADMIN_HOST_INFO_BUS_SHIFT 8
#define ENA_ADMIN_HOST_INFO_BUS_MASK GENMASK(15, 8)
/* aenq_common_desc */
#define ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK BIT(0)

298
drivers/net/ethernet/amazon/ena/ena_com.c
View File

@ -41,9 +41,6 @@
#define ENA_ASYNC_QUEUE_DEPTH 16
#define ENA_ADMIN_QUEUE_DEPTH 32
#define MIN_ENA_VER (((ENA_COMMON_SPEC_VERSION_MAJOR) << \
ENA_REGS_VERSION_MAJOR_VERSION_SHIFT) \
| (ENA_COMMON_SPEC_VERSION_MINOR))
#define ENA_CTRL_MAJOR 0
#define ENA_CTRL_MINOR 0
@ -61,6 +58,8 @@
#define ENA_MMIO_READ_TIMEOUT 0xFFFFFFFF
#define ENA_COM_BOUNCE_BUFFER_CNTRL_CNT 4
#define ENA_REGS_ADMIN_INTR_MASK 1
#define ENA_POLL_MS 5
@ -236,7 +235,7 @@ static struct ena_comp_ctx *__ena_com_submit_admin_cmd(struct ena_com_admin_queu
tail_masked = admin_queue->sq.tail & queue_size_mask;
/* In case of queue FULL */
cnt = atomic_read(&admin_queue->outstanding_cmds);
cnt = (u16)atomic_read(&admin_queue->outstanding_cmds);
if (cnt >= admin_queue->q_depth) {
pr_debug("admin queue is full.\n");
admin_queue->stats.out_of_space++;
@ -305,7 +304,7 @@ static struct ena_comp_ctx *ena_com_submit_admin_cmd(struct ena_com_admin_queue
struct ena_admin_acq_entry *comp,
size_t comp_size_in_bytes)
{
unsigned long flags;
unsigned long flags = 0;
struct ena_comp_ctx *comp_ctx;
spin_lock_irqsave(&admin_queue->q_lock, flags);
@ -333,7 +332,7 @@ static int ena_com_init_io_sq(struct ena_com_dev *ena_dev,
memset(&io_sq->desc_addr, 0x0, sizeof(io_sq->desc_addr));
io_sq->dma_addr_bits = ena_dev->dma_addr_bits;
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) :
@ -355,22 +354,49 @@ static int ena_com_init_io_sq(struct ena_com_dev *ena_dev,
&io_sq->desc_addr.phys_addr,
GFP_KERNEL);
}
} else {
dev_node = dev_to_node(ena_dev->dmadev);
set_dev_node(ena_dev->dmadev, ctx->numa_node);
io_sq->desc_addr.virt_addr =
devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
set_dev_node(ena_dev->dmadev, dev_node);
if (!io_sq->desc_addr.virt_addr) {
io_sq->desc_addr.virt_addr =
devm_kzalloc(ena_dev->dmadev, size, GFP_KERNEL);
}
}
if (!io_sq->desc_addr.virt_addr) {
pr_err("memory allocation failed");
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) {
pr_err("bounce buffer memory allocation failed");
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->tail = 0;
io_sq->next_to_comp = 0;
@ -511,7 +537,8 @@ static int ena_com_comp_status_to_errno(u8 comp_status)
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, timeout;
unsigned long flags = 0;
unsigned long timeout;
int ret;
timeout = jiffies + usecs_to_jiffies(admin_queue->completion_timeout);
@ -557,10 +584,160 @@ err:
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;
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))
pr_err("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;
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 {
pr_err("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 {
pr_err("Invalid desc_stride_ctrl, supported: 0x%x\n",
supported_feat);
return -EINVAL;
}
pr_err("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 {
pr_err("Invalid entry_size_ctrl, supported: 0x%x\n",
supported_feat);
return -EINVAL;
}
pr_err("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()
*/
pr_err("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 {
pr_err("Invalid descs_num_before_header, supported: 0x%x\n",
supported_feat);
return -EINVAL;
}
pr_err("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);
}
rc = ena_com_set_llq(ena_dev);
if (rc)
pr_err("Cannot set LLQ configuration: %d\n", rc);
return 0;
}
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;
unsigned long flags = 0;
int ret;
wait_for_completion_timeout(&comp_ctx->wait_event,
@ -606,7 +783,7 @@ static u32 ena_com_reg_bar_read32(struct ena_com_dev *ena_dev, u16 offset)
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;
unsigned long flags = 0;
u32 timeout = mmio_read->reg_read_to;
might_sleep();
@ -728,15 +905,17 @@ static void ena_com_io_queue_free(struct ena_com_dev *ena_dev,
if (io_sq->desc_addr.virt_addr) {
size = io_sq->desc_entry_size * io_sq->q_depth;
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
dma_free_coherent(ena_dev->dmadev, size,
io_sq->desc_addr.virt_addr,
io_sq->desc_addr.phys_addr);
else
devm_kfree(ena_dev->dmadev, io_sq->desc_addr.virt_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,
@ -1248,7 +1427,7 @@ void ena_com_abort_admin_commands(struct ena_com_dev *ena_dev)
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;
unsigned long flags = 0;
spin_lock_irqsave(&admin_queue->q_lock, flags);
while (atomic_read(&admin_queue->outstanding_cmds) != 0) {
@ -1292,7 +1471,7 @@ bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev)
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;
unsigned long flags = 0;
spin_lock_irqsave(&admin_queue->q_lock, flags);
ena_dev->admin_queue.running_state = state;
@ -1326,7 +1505,7 @@ int ena_com_set_aenq_config(struct ena_com_dev *ena_dev, u32 groups_flag)
}
if ((get_resp.u.aenq.supported_groups & groups_flag) != groups_flag) {
pr_warn("Trying to set unsupported aenq events. supported flag: %x asked flag: %x\n",
pr_warn("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;
}
@ -1400,11 +1579,6 @@ int ena_com_validate_version(struct ena_com_dev *ena_dev)
ENA_REGS_VERSION_MAJOR_VERSION_SHIFT,
ver & ENA_REGS_VERSION_MINOR_VERSION_MASK);
if (ver < MIN_ENA_VER) {
pr_err("ENA version is lower than the minimal version the driver supports\n");
return -1;
}
pr_info("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,
@ -1479,7 +1653,7 @@ int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev)
sizeof(*mmio_read->read_resp),
&mmio_read->read_resp_dma_addr, GFP_KERNEL);
if (unlikely(!mmio_read->read_resp))
return -ENOMEM;
goto err;
ena_com_mmio_reg_read_request_write_dev_addr(ena_dev);
@ -1488,6 +1662,10 @@ int ena_com_mmio_reg_read_request_init(struct ena_com_dev *ena_dev)
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)
@ -1523,8 +1701,7 @@ void ena_com_mmio_reg_read_request_write_dev_addr(struct ena_com_dev *ena_dev)
}
int ena_com_admin_init(struct ena_com_dev *ena_dev,
struct ena_aenq_handlers *aenq_handlers,
bool init_spinlock)
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;
@ -1550,7 +1727,6 @@ int ena_com_admin_init(struct ena_com_dev *ena_dev,
atomic_set(&admin_queue->outstanding_cmds, 0);
if (init_spinlock)
spin_lock_init(&admin_queue->q_lock);
ret = ena_com_init_comp_ctxt(admin_queue);
@ -1748,6 +1924,15 @@ int ena_com_get_dev_attr_feat(struct ena_com_dev *ena_dev,
else
return rc;
rc = ena_com_get_feature(ena_dev, &get_resp, ENA_ADMIN_LLQ);
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;
}
@ -1779,6 +1964,7 @@ void ena_com_aenq_intr_handler(struct ena_com_dev *dev, void *data)
struct ena_admin_aenq_entry *aenq_e;
struct ena_admin_aenq_common_desc *aenq_common;
struct ena_com_aenq *aenq = &dev->aenq;
unsigned long long timestamp;
ena_aenq_handler handler_cb;
u16 masked_head, processed = 0;
u8 phase;
@ -1796,10 +1982,11 @@ void ena_com_aenq_intr_handler(struct ena_com_dev *dev, void *data)
*/
dma_rmb();
timestamp =
(unsigned long long)aenq_common->timestamp_low |
((unsigned long long)aenq_common->timestamp_high << 32);
pr_debug("AENQ! Group[%x] Syndrom[%x] timestamp: [%llus]\n",
aenq_common->group, aenq_common->syndrom,
(u64)aenq_common->timestamp_low +
((u64)aenq_common->timestamp_high << 32));
aenq_common->group, aenq_common->syndrom, timestamp);
/* Handle specific event*/
handler_cb = ena_com_get_specific_aenq_cb(dev,
@ -2441,6 +2628,10 @@ int ena_com_allocate_host_info(struct ena_com_dev *ena_dev)
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;
}
@ -2712,3 +2903,34 @@ void ena_com_get_intr_moderation_entry(struct ena_com_dev *ena_dev,
intr_moder_tbl[level].pkts_per_interval;
entry->bytes_per_interval = intr_moder_tbl[level].bytes_per_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)
{
int rc;
int size;
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;
/* Validate the descriptor is not too big */
size = ena_dev->tx_max_header_size;
size += ena_dev->llq_info.descs_num_before_header *
sizeof(struct ena_eth_io_tx_desc);
if (unlikely(ena_dev->llq_info.desc_list_entry_size < size)) {
pr_err("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;
}

71
drivers/net/ethernet/amazon/ena/ena_com.h
View File

@ -37,6 +37,7 @@
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/gfp.h>
#include <linux/io.h>
#include <linux/sched.h>
#include <linux/sizes.h>
#include <linux/spinlock.h>
@ -108,6 +109,14 @@ enum ena_intr_moder_level {
ENA_INTR_MAX_NUM_OF_LEVELS,
};
struct ena_llq_configurations {
enum ena_admin_llq_header_location llq_header_location;
enum ena_admin_llq_ring_entry_size llq_ring_entry_size;
enum ena_admin_llq_stride_ctrl llq_stride_ctrl;
enum ena_admin_llq_num_descs_before_header llq_num_decs_before_header;
u16 llq_ring_entry_size_value;
};
struct ena_intr_moder_entry {
unsigned int intr_moder_interval;
unsigned int pkts_per_interval;
@ -142,6 +151,15 @@ struct ena_com_tx_meta {
u16 l4_hdr_len; /* In words */
};
struct ena_com_llq_info {
u16 header_location_ctrl;
u16 desc_stride_ctrl;
u16 desc_list_entry_size_ctrl;
u16 desc_list_entry_size;
u16 descs_num_before_header;
u16 descs_per_entry;
};
struct ena_com_io_cq {
struct ena_com_io_desc_addr cdesc_addr;
@ -179,6 +197,20 @@ struct ena_com_io_cq {
} ____cacheline_aligned;
struct ena_com_io_bounce_buffer_control {
u8 *base_buffer;
u16 next_to_use;
u16 buffer_size;
u16 buffers_num; /* Must be a power of 2 */
};
/* This struct is to keep tracking the current location of the next llq entry */
struct ena_com_llq_pkt_ctrl {
u8 *curr_bounce_buf;
u16 idx;
u16 descs_left_in_line;
};
struct ena_com_io_sq {
struct ena_com_io_desc_addr desc_addr;
@ -190,6 +222,9 @@ struct ena_com_io_sq {
u32 msix_vector;
struct ena_com_tx_meta cached_tx_meta;
struct ena_com_llq_info llq_info;
struct ena_com_llq_pkt_ctrl llq_buf_ctrl;
struct ena_com_io_bounce_buffer_control bounce_buf_ctrl;
u16 q_depth;
u16 qid;
@ -197,6 +232,7 @@ struct ena_com_io_sq {
u16 idx;
u16 tail;
u16 next_to_comp;
u16 llq_last_copy_tail;
u32 tx_max_header_size;
u8 phase;
u8 desc_entry_size;
@ -334,6 +370,8 @@ struct ena_com_dev {
u16 intr_delay_resolution;
u32 intr_moder_tx_interval;
struct ena_intr_moder_entry *intr_moder_tbl;
struct ena_com_llq_info llq_info;
};
struct ena_com_dev_get_features_ctx {
@ -342,6 +380,7 @@ struct ena_com_dev_get_features_ctx {
struct ena_admin_feature_aenq_desc aenq;
struct ena_admin_feature_offload_desc offload;
struct ena_admin_ena_hw_hints hw_hints;
struct ena_admin_feature_llq_desc llq;
};
struct ena_com_create_io_ctx {
@ -397,8 +436,6 @@ void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev);
/* ena_com_admin_init - Init the admin and the async queues
* @ena_dev: ENA communication layer struct
* @aenq_handlers: Those handlers to be called upon event.
* @init_spinlock: Indicate if this method should init the admin spinlock or
* the spinlock was init before (for example, in a case of FLR).
*
* Initialize the admin submission and completion queues.
* Initialize the asynchronous events notification queues.
@ -406,8 +443,7 @@ void ena_com_mmio_reg_read_request_destroy(struct ena_com_dev *ena_dev);
* @return - 0 on success, negative value on failure.
*/
int ena_com_admin_init(struct ena_com_dev *ena_dev,
struct ena_aenq_handlers *aenq_handlers,
bool init_spinlock);
struct ena_aenq_handlers *aenq_handlers);
/* ena_com_admin_destroy - Destroy the admin and the async events queues.
* @ena_dev: ENA communication layer struct
@ -935,6 +971,16 @@ void ena_com_get_intr_moderation_entry(struct ena_com_dev *ena_dev,
enum ena_intr_moder_level level,
struct ena_intr_moder_entry *entry);
/* ena_com_config_dev_mode - Configure the placement policy of the device.
* @ena_dev: ENA communication layer struct
* @llq_features: LLQ feature descriptor, retrieve via
* ena_com_get_dev_attr_feat.
* @ena_llq_config: The default driver LLQ parameters configurations
*/
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_config);
static inline bool ena_com_get_adaptive_moderation_enabled(struct ena_com_dev *ena_dev)
{
return ena_dev->adaptive_coalescing;
@ -1044,4 +1090,21 @@ static inline void ena_com_update_intr_reg(struct ena_eth_io_intr_reg *intr_reg,
intr_reg->intr_control |= ENA_ETH_IO_INTR_REG_INTR_UNMASK_MASK;
}
static inline u8 *ena_com_get_next_bounce_buffer(struct ena_com_io_bounce_buffer_control *bounce_buf_ctrl)
{
u16 size, buffers_num;
u8 *buf;
size = bounce_buf_ctrl->buffer_size;
buffers_num = bounce_buf_ctrl->buffers_num;
buf = bounce_buf_ctrl->base_buffer +
(bounce_buf_ctrl->next_to_use++ & (buffers_num - 1)) * size;
prefetchw(bounce_buf_ctrl->base_buffer +
(bounce_buf_ctrl->next_to_use & (buffers_num - 1)) * size);
return buf;
}
#endif /* !(ENA_COM) */

4
drivers/net/ethernet/amazon/ena/ena_common_defs.h
View File

@ -32,8 +32,8 @@
#ifndef _ENA_COMMON_H_
#define _ENA_COMMON_H_
#define ENA_COMMON_SPEC_VERSION_MAJOR 0 /* */
#define ENA_COMMON_SPEC_VERSION_MINOR 10 /* */
#define ENA_COMMON_SPEC_VERSION_MAJOR 2
#define ENA_COMMON_SPEC_VERSION_MINOR 0
/* ENA operates with 48-bit memory addresses. ena_mem_addr_t */
struct ena_common_mem_addr {

275
drivers/net/ethernet/amazon/ena/ena_eth_com.c
View File

@ -59,16 +59,7 @@ static inline struct ena_eth_io_rx_cdesc_base *ena_com_get_next_rx_cdesc(
return cdesc;
}
static inline void ena_com_cq_inc_head(struct ena_com_io_cq *io_cq)
{
io_cq->head++;
/* Switch phase bit in case of wrap around */
if (unlikely((io_cq->head & (io_cq->q_depth - 1)) == 0))
io_cq->phase ^= 1;
}
static inline void *get_sq_desc(struct ena_com_io_sq *io_sq)
static inline void *get_sq_desc_regular_queue(struct ena_com_io_sq *io_sq)
{
u16 tail_masked;
u32 offset;
@ -80,45 +71,159 @@ static inline void *get_sq_desc(struct ena_com_io_sq *io_sq)
return (void *)((uintptr_t)io_sq->desc_addr.virt_addr + offset);
}
static inline void ena_com_copy_curr_sq_desc_to_dev(struct ena_com_io_sq *io_sq)
static inline int ena_com_write_bounce_buffer_to_dev(struct ena_com_io_sq *io_sq,
u8 *bounce_buffer)
{
u16 tail_masked = io_sq->tail & (io_sq->q_depth - 1);
u32 offset = tail_masked * io_sq->desc_entry_size;
struct ena_com_llq_info *llq_info = &io_sq->llq_info;
/* In case this queue isn't a LLQ */
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
return;
u16 dst_tail_mask;
u32 dst_offset;
memcpy_toio(io_sq->desc_addr.pbuf_dev_addr + offset,
io_sq->desc_addr.virt_addr + offset,
io_sq->desc_entry_size);
}
dst_tail_mask = io_sq->tail & (io_sq->q_depth - 1);
dst_offset = dst_tail_mask * llq_info->desc_list_entry_size;
/* Make sure everything was written into the bounce buffer before
* writing the bounce buffer to the device
*/
wmb();
/* The line is completed. Copy it to dev */
__iowrite64_copy(io_sq->desc_addr.pbuf_dev_addr + dst_offset,
bounce_buffer, (llq_info->desc_list_entry_size) / 8);
static inline void ena_com_sq_update_tail(struct ena_com_io_sq *io_sq)
{
io_sq->tail++;
/* Switch phase bit in case of wrap around */
if (unlikely((io_sq->tail & (io_sq->q_depth - 1)) == 0))
io_sq->phase ^= 1;
return 0;
}
static inline int ena_com_write_header(struct ena_com_io_sq *io_sq,
u8 *head_src, u16 header_len)
static inline int ena_com_write_header_to_bounce(struct ena_com_io_sq *io_sq,
u8 *header_src,
u16 header_len)
{
u16 tail_masked = io_sq->tail & (io_sq->q_depth - 1);
u8 __iomem *dev_head_addr =
io_sq->header_addr + (tail_masked * io_sq->tx_max_header_size);
struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl;
struct ena_com_llq_info *llq_info = &io_sq->llq_info;
u8 *bounce_buffer = pkt_ctrl->curr_bounce_buf;
u16 header_offset;
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
if (unlikely(io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST))
return 0;
if (unlikely(!io_sq->header_addr)) {
pr_err("Push buffer header ptr is NULL\n");
return -EINVAL;
header_offset =
llq_info->descs_num_before_header * io_sq->desc_entry_size;
if (unlikely((header_offset + header_len) >
llq_info->desc_list_entry_size)) {
pr_err("trying to write header larger than llq entry can accommodate\n");
return -EFAULT;
}
memcpy_toio(dev_head_addr, head_src, header_len);
if (unlikely(!bounce_buffer)) {
pr_err("bounce buffer is NULL\n");
return -EFAULT;
}
memcpy(bounce_buffer + header_offset, header_src, header_len);
return 0;
}
static inline void *get_sq_desc_llq(struct ena_com_io_sq *io_sq)
{
struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl;
u8 *bounce_buffer;
void *sq_desc;
bounce_buffer = pkt_ctrl->curr_bounce_buf;
if (unlikely(!bounce_buffer)) {
pr_err("bounce buffer is NULL\n");
return NULL;
}
sq_desc = bounce_buffer + pkt_ctrl->idx * io_sq->desc_entry_size;
pkt_ctrl->idx++;
pkt_ctrl->descs_left_in_line--;
return sq_desc;
}
static inline int ena_com_close_bounce_buffer(struct ena_com_io_sq *io_sq)
{
struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl;
struct ena_com_llq_info *llq_info = &io_sq->llq_info;
int rc;
if (unlikely(io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST))
return 0;
/* bounce buffer was used, so write it and get a new one */
if (pkt_ctrl->idx) {
rc = ena_com_write_bounce_buffer_to_dev(io_sq,
pkt_ctrl->curr_bounce_buf);
if (unlikely(rc))
return rc;
pkt_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, llq_info->desc_list_entry_size);
}
pkt_ctrl->idx = 0;
pkt_ctrl->descs_left_in_line = llq_info->descs_num_before_header;
return 0;
}
static inline void *get_sq_desc(struct ena_com_io_sq *io_sq)
{
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
return get_sq_desc_llq(io_sq);
return get_sq_desc_regular_queue(io_sq);
}
static inline int ena_com_sq_update_llq_tail(struct ena_com_io_sq *io_sq)
{
struct ena_com_llq_pkt_ctrl *pkt_ctrl = &io_sq->llq_buf_ctrl;
struct ena_com_llq_info *llq_info = &io_sq->llq_info;
int rc;
if (!pkt_ctrl->descs_left_in_line) {
rc = ena_com_write_bounce_buffer_to_dev(io_sq,
pkt_ctrl->curr_bounce_buf);
if (unlikely(rc))
return rc;
pkt_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, llq_info->desc_list_entry_size);
pkt_ctrl->idx = 0;
if (unlikely(llq_info->desc_stride_ctrl == ENA_ADMIN_SINGLE_DESC_PER_ENTRY))
pkt_ctrl->descs_left_in_line = 1;
else
pkt_ctrl->descs_left_in_line =
llq_info->desc_list_entry_size / io_sq->desc_entry_size;
}
return 0;
}
static inline int ena_com_sq_update_tail(struct ena_com_io_sq *io_sq)
{
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
return ena_com_sq_update_llq_tail(io_sq);
io_sq->tail++;
/* Switch phase bit in case of wrap around */
if (unlikely((io_sq->tail & (io_sq->q_depth - 1)) == 0))
io_sq->phase ^= 1;
return 0;
}
@ -186,7 +291,7 @@ static inline bool ena_com_meta_desc_changed(struct ena_com_io_sq *io_sq,
return false;
}
static inline void ena_com_create_and_store_tx_meta_desc(struct ena_com_io_sq *io_sq,
static inline int ena_com_create_and_store_tx_meta_desc(struct ena_com_io_sq *io_sq,
struct ena_com_tx_ctx *ena_tx_ctx)
{
struct ena_eth_io_tx_meta_desc *meta_desc = NULL;
@ -232,8 +337,7 @@ static inline void ena_com_create_and_store_tx_meta_desc(struct ena_com_io_sq *i
memcpy(&io_sq->cached_tx_meta, ena_meta,
sizeof(struct ena_com_tx_meta));
ena_com_copy_curr_sq_desc_to_dev(io_sq);
ena_com_sq_update_tail(io_sq);
return ena_com_sq_update_tail(io_sq);
}
static inline void ena_com_rx_set_flags(struct ena_com_rx_ctx *ena_rx_ctx,
@ -250,6 +354,9 @@ static inline void ena_com_rx_set_flags(struct ena_com_rx_ctx *ena_rx_ctx,
ena_rx_ctx->l4_csum_err =
(cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_MASK) >>
ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_SHIFT;
ena_rx_ctx->l4_csum_checked =
!!((cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_MASK) >>
ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_SHIFT);
ena_rx_ctx->hash = cdesc->hash;
ena_rx_ctx->frag =
(cdesc->status & ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_MASK) >>
@ -271,18 +378,19 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
{
struct ena_eth_io_tx_desc *desc = NULL;
struct ena_com_buf *ena_bufs = ena_tx_ctx->ena_bufs;
void *push_header = ena_tx_ctx->push_header;
void *buffer_to_push = ena_tx_ctx->push_header;
u16 header_len = ena_tx_ctx->header_len;
u16 num_bufs = ena_tx_ctx->num_bufs;
int total_desc, i, rc;
u16 start_tail = io_sq->tail;
int i, rc;
bool have_meta;
u64 addr_hi;
WARN(io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_TX, "wrong Q type");
/* num_bufs +1 for potential meta desc */
if (ena_com_sq_empty_space(io_sq) < (num_bufs + 1)) {
pr_err("Not enough space in the tx queue\n");
if (unlikely(!ena_com_sq_have_enough_space(io_sq, num_bufs + 1))) {
pr_debug("Not enough space in the tx queue\n");
return -ENOMEM;
}
@ -292,23 +400,32 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
return -EINVAL;
}
/* start with pushing the header (if needed) */
rc = ena_com_write_header(io_sq, push_header, header_len);
if (unlikely(io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV &&
!buffer_to_push))
return -EINVAL;
rc = ena_com_write_header_to_bounce(io_sq, buffer_to_push, header_len);
if (unlikely(rc))
return rc;
have_meta = ena_tx_ctx->meta_valid && ena_com_meta_desc_changed(io_sq,
ena_tx_ctx);
if (have_meta)
ena_com_create_and_store_tx_meta_desc(io_sq, ena_tx_ctx);
if (have_meta) {
rc = ena_com_create_and_store_tx_meta_desc(io_sq, ena_tx_ctx);
if (unlikely(rc))
return rc;
}
/* If the caller doesn't want send packets */
/* If the caller doesn't want to send packets */
if (unlikely(!num_bufs && !header_len)) {
*nb_hw_desc = have_meta ? 0 : 1;
return 0;
rc = ena_com_close_bounce_buffer(io_sq);
*nb_hw_desc = io_sq->tail - start_tail;
return rc;
}
desc = get_sq_desc(io_sq);
if (unlikely(!desc))
return -EFAULT;
memset(desc, 0x0, sizeof(struct ena_eth_io_tx_desc));
/* Set first desc when we don't have meta descriptor */
@ -360,10 +477,14 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
for (i = 0; i < num_bufs; i++) {
/* The first desc share the same desc as the header */
if (likely(i != 0)) {
ena_com_copy_curr_sq_desc_to_dev(io_sq);
ena_com_sq_update_tail(io_sq);
rc = ena_com_sq_update_tail(io_sq);
if (unlikely(rc))
return rc;
desc = get_sq_desc(io_sq);
if (unlikely(!desc))
return -EFAULT;
memset(desc, 0x0, sizeof(struct ena_eth_io_tx_desc));
desc->len_ctrl |= (io_sq->phase <<
@ -386,15 +507,14 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
/* set the last desc indicator */
desc->len_ctrl |= ENA_ETH_IO_TX_DESC_LAST_MASK;
ena_com_copy_curr_sq_desc_to_dev(io_sq);
rc = ena_com_sq_update_tail(io_sq);
if (unlikely(rc))
return rc;
ena_com_sq_update_tail(io_sq);
rc = ena_com_close_bounce_buffer(io_sq);
total_desc = max_t(u16, num_bufs, 1);
total_desc += have_meta ? 1 : 0;
*nb_hw_desc = total_desc;
return 0;
*nb_hw_desc = io_sq->tail - start_tail;
return rc;
}
int ena_com_rx_pkt(struct ena_com_io_cq *io_cq,
@ -453,15 +573,18 @@ int ena_com_add_single_rx_desc(struct ena_com_io_sq *io_sq,
WARN(io_sq->direction != ENA_COM_IO_QUEUE_DIRECTION_RX, "wrong Q type");
if (unlikely(ena_com_sq_empty_space(io_sq) == 0))
if (unlikely(!ena_com_sq_have_enough_space(io_sq, 1)))
return -ENOSPC;
desc = get_sq_desc(io_sq);
if (unlikely(!desc))
return -EFAULT;
memset(desc, 0x0, sizeof(struct ena_eth_io_rx_desc));
desc->length = ena_buf->len;
desc->ctrl |= ENA_ETH_IO_RX_DESC_FIRST_MASK;
desc->ctrl = ENA_ETH_IO_RX_DESC_FIRST_MASK;
desc->ctrl |= ENA_ETH_IO_RX_DESC_LAST_MASK;
desc->ctrl |= io_sq->phase & ENA_ETH_IO_RX_DESC_PHASE_MASK;
desc->ctrl |= ENA_ETH_IO_RX_DESC_COMP_REQ_MASK;
@ -472,43 +595,7 @@ int ena_com_add_single_rx_desc(struct ena_com_io_sq *io_sq,
desc->buff_addr_hi =
((ena_buf->paddr & GENMASK_ULL(io_sq->dma_addr_bits - 1, 32)) >> 32);
ena_com_sq_update_tail(io_sq);
return 0;
}
int ena_com_tx_comp_req_id_get(struct ena_com_io_cq *io_cq, u16 *req_id)
{
u8 expected_phase, cdesc_phase;
struct ena_eth_io_tx_cdesc *cdesc;
u16 masked_head;
masked_head = io_cq->head & (io_cq->q_depth - 1);
expected_phase = io_cq->phase;
cdesc = (struct ena_eth_io_tx_cdesc *)
((uintptr_t)io_cq->cdesc_addr.virt_addr +
(masked_head * io_cq->cdesc_entry_size_in_bytes));
/* When the current completion descriptor phase isn't the same as the
* expected, it mean that the device still didn't update
* this completion.
*/
cdesc_phase = READ_ONCE(cdesc->flags) & ENA_ETH_IO_TX_CDESC_PHASE_MASK;
if (cdesc_phase != expected_phase)
return -EAGAIN;
dma_rmb();
if (unlikely(cdesc->req_id >= io_cq->q_depth)) {
pr_err("Invalid req id %d\n", cdesc->req_id);
return -EINVAL;
}
ena_com_cq_inc_head(io_cq);
*req_id = READ_ONCE(cdesc->req_id);
return 0;
return ena_com_sq_update_tail(io_sq);
}
bool ena_com_cq_empty(struct ena_com_io_cq *io_cq)

72
drivers/net/ethernet/amazon/ena/ena_eth_com.h
View File

@ -67,6 +67,7 @@ struct ena_com_rx_ctx {
enum ena_eth_io_l4_proto_index l4_proto;
bool l3_csum_err;
bool l4_csum_err;
u8 l4_csum_checked;
/* fragmented packet */
bool frag;
u32 hash;
@ -86,8 +87,6 @@ int ena_com_add_single_rx_desc(struct ena_com_io_sq *io_sq,
struct ena_com_buf *ena_buf,
u16 req_id);
int ena_com_tx_comp_req_id_get(struct ena_com_io_cq *io_cq, u16 *req_id);
bool ena_com_cq_empty(struct ena_com_io_cq *io_cq);
static inline void ena_com_unmask_intr(struct ena_com_io_cq *io_cq,
@ -96,7 +95,7 @@ static inline void ena_com_unmask_intr(struct ena_com_io_cq *io_cq,
writel(intr_reg->intr_control, io_cq->unmask_reg);
}
static inline int ena_com_sq_empty_space(struct ena_com_io_sq *io_sq)
static inline int ena_com_free_desc(struct ena_com_io_sq *io_sq)
{
u16 tail, next_to_comp, cnt;
@ -107,11 +106,28 @@ static inline int ena_com_sq_empty_space(struct ena_com_io_sq *io_sq)
return io_sq->q_depth - 1 - cnt;
}
/* Check if the submission queue has enough space to hold required_buffers */
static inline bool ena_com_sq_have_enough_space(struct ena_com_io_sq *io_sq,
u16 required_buffers)
{
int temp;
if (io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
return ena_com_free_desc(io_sq) >= required_buffers;
/* This calculation doesn't need to be 100% accurate. So to reduce
* the calculation overhead just Subtract 2 lines from the free descs
* (one for the header line and one to compensate the devision
* down calculation.
*/
temp = required_buffers / io_sq->llq_info.descs_per_entry + 2;
return ena_com_free_desc(io_sq) > temp;
}
static inline int ena_com_write_sq_doorbell(struct ena_com_io_sq *io_sq)
{
u16 tail;
tail = io_sq->tail;
u16 tail = io_sq->tail;
pr_debug("write submission queue doorbell for queue: %d tail: %d\n",
io_sq->qid, tail);
@ -159,4 +175,48 @@ static inline void ena_com_comp_ack(struct ena_com_io_sq *io_sq, u16 elem)
io_sq->next_to_comp += elem;
}
static inline void ena_com_cq_inc_head(struct ena_com_io_cq *io_cq)
{
io_cq->head++;
/* Switch phase bit in case of wrap around */
if (unlikely((io_cq->head & (io_cq->q_depth - 1)) == 0))
io_cq->phase ^= 1;
}
static inline int ena_com_tx_comp_req_id_get(struct ena_com_io_cq *io_cq,
u16 *req_id)
{
u8 expected_phase, cdesc_phase;
struct ena_eth_io_tx_cdesc *cdesc;
u16 masked_head;
masked_head = io_cq->head & (io_cq->q_depth - 1);
expected_phase = io_cq->phase;
cdesc = (struct ena_eth_io_tx_cdesc *)
((uintptr_t)io_cq->cdesc_addr.virt_addr +
(masked_head * io_cq->cdesc_entry_size_in_bytes));
/* When the current completion descriptor phase isn't the same as the
* expected, it mean that the device still didn't update
* this completion.
*/
cdesc_phase = READ_ONCE(cdesc->flags) & ENA_ETH_IO_TX_CDESC_PHASE_MASK;
if (cdesc_phase != expected_phase)
return -EAGAIN;
dma_rmb();
*req_id = READ_ONCE(cdesc->req_id);
if (unlikely(*req_id >= io_cq->q_depth)) {
pr_err("Invalid req id %d\n", cdesc->req_id);
return -EINVAL;
}
ena_com_cq_inc_head(io_cq);
return 0;
}
#endif /* ENA_ETH_COM_H_ */

17
drivers/net/ethernet/amazon/ena/ena_eth_io_defs.h
View File

@ -34,23 +34,16 @@
enum ena_eth_io_l3_proto_index {
ENA_ETH_IO_L3_PROTO_UNKNOWN = 0,
ENA_ETH_IO_L3_PROTO_IPV4 = 8,
ENA_ETH_IO_L3_PROTO_IPV6 = 11,
ENA_ETH_IO_L3_PROTO_FCOE = 21,
ENA_ETH_IO_L3_PROTO_ROCE = 22,
};
enum ena_eth_io_l4_proto_index {
ENA_ETH_IO_L4_PROTO_UNKNOWN = 0,
ENA_ETH_IO_L4_PROTO_TCP = 12,
ENA_ETH_IO_L4_PROTO_UDP = 13,
ENA_ETH_IO_L4_PROTO_ROUTEABLE_ROCE = 23,
};
@ -242,9 +235,13 @@ struct ena_eth_io_rx_cdesc_base {
* checksum error detected, or, the controller didn't
* validate the checksum. This bit is valid only when
* l4_proto_idx indicates TCP/UDP packet, and,
* ipv4_frag is not set
* ipv4_frag is not set. This bit is valid only when
* l4_csum_checked below is set.
* 15 : ipv4_frag - Indicates IPv4 fragmented packet
* 23:16 : reserved16
* 16 : l4_csum_checked - L4 checksum was verified
* (could be OK or error), when cleared the status of
* checksum is unknown
* 23:17 : reserved17 - MBZ
* 24 : phase
* 25 : l3_csum2 - second checksum engine result
* 26 : first - Indicates first descriptor in
@ -390,6 +387,8 @@ struct ena_eth_io_numa_node_cfg_reg {
#define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_ERR_MASK BIT(14)
#define ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_SHIFT 15
#define ENA_ETH_IO_RX_CDESC_BASE_IPV4_FRAG_MASK BIT(15)
#define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_SHIFT 16
#define ENA_ETH_IO_RX_CDESC_BASE_L4_CSUM_CHECKED_MASK BIT(16)
#define ENA_ETH_IO_RX_CDESC_BASE_PHASE_SHIFT 24
#define ENA_ETH_IO_RX_CDESC_BASE_PHASE_MASK BIT(24)
#define ENA_ETH_IO_RX_CDESC_BASE_L3_CSUM2_SHIFT 25

2
drivers/net/ethernet/amazon/ena/ena_ethtool.c
View File

@ -81,6 +81,7 @@ static const struct ena_stats ena_stats_tx_strings[] = {
ENA_STAT_TX_ENTRY(doorbells),
ENA_STAT_TX_ENTRY(prepare_ctx_err),
ENA_STAT_TX_ENTRY(bad_req_id),
ENA_STAT_TX_ENTRY(llq_buffer_copy),
ENA_STAT_TX_ENTRY(missed_tx),
};
@ -96,6 +97,7 @@ static const struct ena_stats ena_stats_rx_strings[] = {
ENA_STAT_RX_ENTRY(rx_copybreak_pkt),
ENA_STAT_RX_ENTRY(bad_req_id),
ENA_STAT_RX_ENTRY(empty_rx_ring),
ENA_STAT_RX_ENTRY(csum_unchecked),
};
static const struct ena_stats ena_stats_ena_com_strings[] = {

444
drivers/net/ethernet/amazon/ena/ena_netdev.c
View File

@ -237,6 +237,17 @@ static int ena_setup_tx_resources(struct ena_adapter *adapter, int qid)
}
}
size = tx_ring->tx_max_header_size;
tx_ring->push_buf_intermediate_buf = vzalloc_node(size, node);
if (!tx_ring->push_buf_intermediate_buf) {
tx_ring->push_buf_intermediate_buf = vzalloc(size);
if (!tx_ring->push_buf_intermediate_buf) {
vfree(tx_ring->tx_buffer_info);
vfree(tx_ring->free_tx_ids);
return -ENOMEM;
}
}
/* Req id ring for TX out of order completions */
for (i = 0; i < tx_ring->ring_size; i++)
tx_ring->free_tx_ids[i] = i;
@ -265,6 +276,9 @@ static void ena_free_tx_resources(struct ena_adapter *adapter, int qid)
vfree(tx_ring->free_tx_ids);
tx_ring->free_tx_ids = NULL;
vfree(tx_ring->push_buf_intermediate_buf);
tx_ring->push_buf_intermediate_buf = NULL;
}
/* ena_setup_all_tx_resources - allocate I/O Tx queues resources for All queues
@ -602,6 +616,36 @@ static void ena_free_all_rx_bufs(struct ena_adapter *adapter)
ena_free_rx_bufs(adapter, i);
}
static inline void ena_unmap_tx_skb(struct ena_ring *tx_ring,
struct ena_tx_buffer *tx_info)
{
struct ena_com_buf *ena_buf;
u32 cnt;
int i;
ena_buf = tx_info->bufs;
cnt = tx_info->num_of_bufs;
if (unlikely(!cnt))
return;
if (tx_info->map_linear_data) {
dma_unmap_single(tx_ring->dev,
dma_unmap_addr(ena_buf, paddr),
dma_unmap_len(ena_buf, len),
DMA_TO_DEVICE);
ena_buf++;
cnt--;
}
/* unmap remaining mapped pages */
for (i = 0; i < cnt; i++) {
dma_unmap_page(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
ena_buf++;
}
}
/* ena_free_tx_bufs - Free Tx Buffers per Queue
* @tx_ring: TX ring for which buffers be freed
*/
@ -612,9 +656,6 @@ static void ena_free_tx_bufs(struct ena_ring *tx_ring)
for (i = 0; i < tx_ring->ring_size; i++) {
struct ena_tx_buffer *tx_info = &tx_ring->tx_buffer_info[i];
struct ena_com_buf *ena_buf;
int nr_frags;
int j;
if (!tx_info->skb)
continue;
@ -630,21 +671,7 @@ static void ena_free_tx_bufs(struct ena_ring *tx_ring)
tx_ring->qid, i);
}
ena_buf = tx_info->bufs;
dma_unmap_single(tx_ring->dev,
ena_buf->paddr,
ena_buf->len,
DMA_TO_DEVICE);
/* unmap remaining mapped pages */
nr_frags = tx_info->num_of_bufs - 1;
for (j = 0; j < nr_frags; j++) {
ena_buf++;
dma_unmap_page(tx_ring->dev,
ena_buf->paddr,
ena_buf->len,
DMA_TO_DEVICE);
}
ena_unmap_tx_skb(tx_ring, tx_info);
dev_kfree_skb_any(tx_info->skb);
}
@ -735,8 +762,6 @@ static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
while (tx_pkts < budget) {
struct ena_tx_buffer *tx_info;
struct sk_buff *skb;
struct ena_com_buf *ena_buf;
int i, nr_frags;
rc = ena_com_tx_comp_req_id_get(tx_ring->ena_com_io_cq,
&req_id);
@ -756,24 +781,7 @@ static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
tx_info->skb = NULL;
tx_info->last_jiffies = 0;
if (likely(tx_info->num_of_bufs != 0)) {
ena_buf = tx_info->bufs;
dma_unmap_single(tx_ring->dev,
dma_unmap_addr(ena_buf, paddr),
dma_unmap_len(ena_buf, len),
DMA_TO_DEVICE);
/* unmap remaining mapped pages */
nr_frags = tx_info->num_of_bufs - 1;
for (i = 0; i < nr_frags; i++) {
ena_buf++;
dma_unmap_page(tx_ring->dev,
dma_unmap_addr(ena_buf, paddr),
dma_unmap_len(ena_buf, len),
DMA_TO_DEVICE);
}
}
ena_unmap_tx_skb(tx_ring, tx_info);
netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
"tx_poll: q %d skb %p completed\n", tx_ring->qid,
@ -804,12 +812,13 @@ static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
*/
smp_mb();
above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) >
ENA_TX_WAKEUP_THRESH;
above_thresh = ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq,
ENA_TX_WAKEUP_THRESH);
if (unlikely(netif_tx_queue_stopped(txq) && above_thresh)) {
__netif_tx_lock(txq, smp_processor_id());
above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) >
ENA_TX_WAKEUP_THRESH;
above_thresh =
ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq,
ENA_TX_WAKEUP_THRESH);
if (netif_tx_queue_stopped(txq) && above_thresh) {
netif_tx_wake_queue(txq);
u64_stats_update_begin(&tx_ring->syncp);
@ -985,8 +994,19 @@ static inline void ena_rx_checksum(struct ena_ring *rx_ring,
return;
}
if (likely(ena_rx_ctx->l4_csum_checked)) {
skb->ip_summed = CHECKSUM_UNNECESSARY;
} else {
u64_stats_update_begin(&rx_ring->syncp);
rx_ring->rx_stats.csum_unchecked++;
u64_stats_update_end(&rx_ring->syncp);
skb->ip_summed = CHECKSUM_NONE;
}
} else {
skb->ip_summed = CHECKSUM_NONE;
return;
}
}
static void ena_set_rx_hash(struct ena_ring *rx_ring,
@ -1101,8 +1121,10 @@ static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
rx_ring->next_to_clean = next_to_clean;
refill_required = ena_com_sq_empty_space(rx_ring->ena_com_io_sq);
refill_threshold = rx_ring->ring_size / ENA_RX_REFILL_THRESH_DIVIDER;
refill_required = ena_com_free_desc(rx_ring->ena_com_io_sq);
refill_threshold =
min_t(int, rx_ring->ring_size / ENA_RX_REFILL_THRESH_DIVIDER,
ENA_RX_REFILL_THRESH_PACKET);
/* Optimization, try to batch new rx buffers */
if (refill_required > refill_threshold) {
@ -1299,7 +1321,6 @@ static int ena_enable_msix(struct ena_adapter *adapter, int num_queues)
/* Reserved the max msix vectors we might need */
msix_vecs = ENA_MAX_MSIX_VEC(num_queues);
netif_dbg(adapter, probe, adapter->netdev,
"trying to enable MSI-X, vectors %d\n", msix_vecs);
@ -1592,7 +1613,7 @@ static int ena_up_complete(struct ena_adapter *adapter)
static int ena_create_io_tx_queue(struct ena_adapter *adapter, int qid)
{
struct ena_com_create_io_ctx ctx = { 0 };
struct ena_com_create_io_ctx ctx;
struct ena_com_dev *ena_dev;
struct ena_ring *tx_ring;
u32 msix_vector;
@ -1605,6 +1626,8 @@ static int ena_create_io_tx_queue(struct ena_adapter *adapter, int qid)
msix_vector = ENA_IO_IRQ_IDX(qid);
ena_qid = ENA_IO_TXQ_IDX(qid);
memset(&ctx, 0x0, sizeof(ctx));
ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_TX;
ctx.qid = ena_qid;
ctx.mem_queue_type = ena_dev->tx_mem_queue_type;
@ -1658,7 +1681,7 @@ create_err:
static int ena_create_io_rx_queue(struct ena_adapter *adapter, int qid)
{
struct ena_com_dev *ena_dev;
struct ena_com_create_io_ctx ctx = { 0 };
struct ena_com_create_io_ctx ctx;
struct ena_ring *rx_ring;
u32 msix_vector;
u16 ena_qid;
@ -1670,6 +1693,8 @@ static int ena_create_io_rx_queue(struct ena_adapter *adapter, int qid)
msix_vector = ENA_IO_IRQ_IDX(qid);
ena_qid = ENA_IO_RXQ_IDX(qid);
memset(&ctx, 0x0, sizeof(ctx));
ctx.qid = ena_qid;
ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_RX;
ctx.mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
@ -1980,6 +2005,112 @@ static int ena_check_and_linearize_skb(struct ena_ring *tx_ring,
return rc;
}
static int ena_tx_map_skb(struct ena_ring *tx_ring,
struct ena_tx_buffer *tx_info,
struct sk_buff *skb,
void **push_hdr,
u16 *header_len)
{
struct ena_adapter *adapter = tx_ring->adapter;
struct ena_com_buf *ena_buf;
dma_addr_t dma;
u32 skb_head_len, frag_len, last_frag;
u16 push_len = 0;
u16 delta = 0;
int i = 0;
skb_head_len = skb_headlen(skb);
tx_info->skb = skb;
ena_buf = tx_info->bufs;
if (tx_ring->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
/* When the device is LLQ mode, the driver will copy
* the header into the device memory space.
* the ena_com layer assume the header is in a linear
* memory space.
* This assumption might be wrong since part of the header
* can be in the fragmented buffers.
* Use skb_header_pointer to make sure the header is in a
* linear memory space.
*/
push_len = min_t(u32, skb->len, tx_ring->tx_max_header_size);
*push_hdr = skb_header_pointer(skb, 0, push_len,
tx_ring->push_buf_intermediate_buf);
*header_len = push_len;
if (unlikely(skb->data != *push_hdr)) {
u64_stats_update_begin(&tx_ring->syncp);
tx_ring->tx_stats.llq_buffer_copy++;
u64_stats_update_end(&tx_ring->syncp);
delta = push_len - skb_head_len;
}
} else {
*push_hdr = NULL;
*header_len = min_t(u32, skb_head_len,
tx_ring->tx_max_header_size);
}
netif_dbg(adapter, tx_queued, adapter->netdev,
"skb: %p header_buf->vaddr: %p push_len: %d\n", skb,
*push_hdr, push_len);
if (skb_head_len > push_len) {
dma = dma_map_single(tx_ring->dev, skb->data + push_len,
skb_head_len - push_len, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(tx_ring->dev, dma)))
goto error_report_dma_error;
ena_buf->paddr = dma;
ena_buf->len = skb_head_len - push_len;
ena_buf++;
tx_info->num_of_bufs++;
tx_info->map_linear_data = 1;
} else {
tx_info->map_linear_data = 0;
}
last_frag = skb_shinfo(skb)->nr_frags;
for (i = 0; i < last_frag; i++) {
const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
frag_len = skb_frag_size(frag);
if (unlikely(delta >= frag_len)) {
delta -= frag_len;
continue;
}
dma = skb_frag_dma_map(tx_ring->dev, frag, delta,
frag_len - delta, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(tx_ring->dev, dma)))
goto error_report_dma_error;
ena_buf->paddr = dma;
ena_buf->len = frag_len - delta;
ena_buf++;
tx_info->num_of_bufs++;
delta = 0;
}
return 0;
error_report_dma_error:
u64_stats_update_begin(&tx_ring->syncp);
tx_ring->tx_stats.dma_mapping_err++;
u64_stats_update_end(&tx_ring->syncp);
netdev_warn(adapter->netdev, "failed to map skb\n");
tx_info->skb = NULL;
tx_info->num_of_bufs += i;
ena_unmap_tx_skb(tx_ring, tx_info);
return -EINVAL;
}
/* Called with netif_tx_lock. */
static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
@ -1988,16 +2119,9 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
struct ena_com_tx_ctx ena_tx_ctx;
struct ena_ring *tx_ring;
struct netdev_queue *txq;
struct ena_com_buf *ena_buf;
void *push_hdr;
u32 len, last_frag;
u16 next_to_use;
u16 req_id;
u16 push_len;
u16 header_len;
dma_addr_t dma;
u16 next_to_use, req_id, header_len;
int qid, rc, nb_hw_desc;
int i = -1;
netif_dbg(adapter, tx_queued, dev, "%s skb %p\n", __func__, skb);
/* Determine which tx ring we will be placed on */
@ -2010,7 +2134,6 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
goto error_drop_packet;
skb_tx_timestamp(skb);
len = skb_headlen(skb);
next_to_use = tx_ring->next_to_use;
req_id = tx_ring->free_tx_ids[next_to_use];
@ -2018,54 +2141,10 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
tx_info->num_of_bufs = 0;
WARN(tx_info->skb, "SKB isn't NULL req_id %d\n", req_id);
ena_buf = tx_info->bufs;
tx_info->skb = skb;
if (tx_ring->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
/* prepared the push buffer */
push_len = min_t(u32, len, tx_ring->tx_max_header_size);
header_len = push_len;
push_hdr = skb->data;
} else {
push_len = 0;
header_len = min_t(u32, len, tx_ring->tx_max_header_size);
push_hdr = NULL;
}
netif_dbg(adapter, tx_queued, dev,
"skb: %p header_buf->vaddr: %p push_len: %d\n", skb,
push_hdr, push_len);
if (len > push_len) {
dma = dma_map_single(tx_ring->dev, skb->data + push_len,
len - push_len, DMA_TO_DEVICE);
if (dma_mapping_error(tx_ring->dev, dma))
goto error_report_dma_error;
ena_buf->paddr = dma;
ena_buf->len = len - push_len;
ena_buf++;
tx_info->num_of_bufs++;
}
last_frag = skb_shinfo(skb)->nr_frags;
for (i = 0; i < last_frag; i++) {
const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
len = skb_frag_size(frag);
dma = skb_frag_dma_map(tx_ring->dev, frag, 0, len,
DMA_TO_DEVICE);
if (dma_mapping_error(tx_ring->dev, dma))
goto error_report_dma_error;
ena_buf->paddr = dma;
ena_buf->len = len;
ena_buf++;
}
tx_info->num_of_bufs += last_frag;
rc = ena_tx_map_skb(tx_ring, tx_info, skb, &push_hdr, &header_len);
if (unlikely(rc))
goto error_drop_packet;
memset(&ena_tx_ctx, 0x0, sizeof(struct ena_com_tx_ctx));
ena_tx_ctx.ena_bufs = tx_info->bufs;
@ -2081,14 +2160,22 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
rc = ena_com_prepare_tx(tx_ring->ena_com_io_sq, &ena_tx_ctx,
&nb_hw_desc);
/* ena_com_prepare_tx() can't fail due to overflow of tx queue,
* since the number of free descriptors in the queue is checked
* after sending the previous packet. In case there isn't enough
* space in the queue for the next packet, it is stopped
* until there is again enough available space in the queue.
* All other failure reasons of ena_com_prepare_tx() are fatal
* and therefore require a device reset.
*/
if (unlikely(rc)) {
netif_err(adapter, tx_queued, dev,
"failed to prepare tx bufs\n");
u64_stats_update_begin(&tx_ring->syncp);
tx_ring->tx_stats.queue_stop++;
tx_ring->tx_stats.prepare_ctx_err++;
u64_stats_update_end(&tx_ring->syncp);
netif_tx_stop_queue(txq);
adapter->reset_reason = ENA_REGS_RESET_DRIVER_INVALID_STATE;
set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
goto error_unmap_dma;
}
@ -2110,8 +2197,8 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
* to sgl_size + 2. one for the meta descriptor and one for header
* (if the header is larger than tx_max_header_size).
*/
if (unlikely(ena_com_sq_empty_space(tx_ring->ena_com_io_sq) <
(tx_ring->sgl_size + 2))) {
if (unlikely(!ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq,
tx_ring->sgl_size + 2))) {
netif_dbg(adapter, tx_queued, dev, "%s stop queue %d\n",
__func__, qid);
@ -2130,8 +2217,8 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
*/
smp_mb();
if (ena_com_sq_empty_space(tx_ring->ena_com_io_sq)
> ENA_TX_WAKEUP_THRESH) {
if (ena_com_sq_have_enough_space(tx_ring->ena_com_io_sq,
ENA_TX_WAKEUP_THRESH)) {
netif_tx_wake_queue(txq);
u64_stats_update_begin(&tx_ring->syncp);
tx_ring->tx_stats.queue_wakeup++;
@ -2151,35 +2238,11 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
return NETDEV_TX_OK;
error_report_dma_error:
u64_stats_update_begin(&tx_ring->syncp);
tx_ring->tx_stats.dma_mapping_err++;
u64_stats_update_end(&tx_ring->syncp);
netdev_warn(adapter->netdev, "failed to map skb\n");
tx_info->skb = NULL;
error_unmap_dma:
if (i >= 0) {
/* save value of frag that failed */
last_frag = i;
/* start back at beginning and unmap skb */
ena_unmap_tx_skb(tx_ring, tx_info);
tx_info->skb = NULL;
ena_buf = tx_info->bufs;
dma_unmap_single(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
/* unmap remaining mapped pages */
for (i = 0; i < last_frag; i++) {
ena_buf++;
dma_unmap_page(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
}
}
error_drop_packet:
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
@ -2201,7 +2264,8 @@ static u16 ena_select_queue(struct net_device *dev, struct sk_buff *skb,
return qid;
}
static void ena_config_host_info(struct ena_com_dev *ena_dev)
static void ena_config_host_info(struct ena_com_dev *ena_dev,
struct pci_dev *pdev)
{
struct ena_admin_host_info *host_info;
int rc;
@ -2215,6 +2279,7 @@ static void ena_config_host_info(struct ena_com_dev *ena_dev)
host_info = ena_dev->host_attr.host_info;
host_info->bdf = (pdev->bus->number << 8) | pdev->devfn;
host_info->os_type = ENA_ADMIN_OS_LINUX;
host_info->kernel_ver = LINUX_VERSION_CODE;
strncpy(host_info->kernel_ver_str, utsname()->version,
@ -2225,7 +2290,9 @@ static void ena_config_host_info(struct ena_com_dev *ena_dev)
host_info->driver_version =
(DRV_MODULE_VER_MAJOR) |
(DRV_MODULE_VER_MINOR << ENA_ADMIN_HOST_INFO_MINOR_SHIFT) |
(DRV_MODULE_VER_SUBMINOR << ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT);
(DRV_MODULE_VER_SUBMINOR << ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT) |
("K"[0] << ENA_ADMIN_HOST_INFO_MODULE_TYPE_SHIFT);
host_info->num_cpus = num_online_cpus();
rc = ena_com_set_host_attributes(ena_dev);
if (rc) {
@ -2436,7 +2503,7 @@ static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
}
/* ENA admin level init */
rc = ena_com_admin_init(ena_dev, &aenq_handlers, true);
rc = ena_com_admin_init(ena_dev, &aenq_handlers);
if (rc) {
dev_err(dev,
"Can not initialize ena admin queue with device\n");
@ -2449,7 +2516,7 @@ static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
*/
ena_com_set_admin_polling_mode(ena_dev, true);
ena_config_host_info(ena_dev);
ena_config_host_info(ena_dev, pdev);
/* Get Device Attributes*/
rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx);
@ -2534,15 +2601,14 @@ static void ena_destroy_device(struct ena_adapter *adapter, bool graceful)
dev_up = test_bit(ENA_FLAG_DEV_UP, &adapter->flags);
adapter->dev_up_before_reset = dev_up;
if (!graceful)
ena_com_set_admin_running_state(ena_dev, false);
if (test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
ena_down(adapter);
/* Before releasing the ENA resources, a device reset is required.
* (to prevent the device from accessing them).
/* Stop the device from sending AENQ events (in case reset flag is set
* and device is up, ena_close already reset the device
* In case the reset flag is set and the device is up, ena_down()
* already perform the reset, so it can be skipped.
*/
@ -2611,7 +2677,9 @@ static int ena_restore_device(struct ena_adapter *adapter)
set_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
dev_err(&pdev->dev, "Device reset completed successfully\n");
dev_err(&pdev->dev,
"Device reset completed successfully, Driver info: %s\n",
version);
return rc;
err_disable_msix:
@ -2800,7 +2868,7 @@ static void check_for_empty_rx_ring(struct ena_adapter *adapter)
rx_ring = &adapter->rx_ring[i];
refill_required =
ena_com_sq_empty_space(rx_ring->ena_com_io_sq);
ena_com_free_desc(rx_ring->ena_com_io_sq);
if (unlikely(refill_required == (rx_ring->ring_size - 1))) {
rx_ring->empty_rx_queue++;
@ -2946,7 +3014,7 @@ static int ena_calc_io_queue_num(struct pci_dev *pdev,
/* In case of LLQ use the llq number in the get feature cmd */
if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
io_sq_num = get_feat_ctx->max_queues.max_llq_num;
io_sq_num = get_feat_ctx->max_queues.max_legacy_llq_num;
if (io_sq_num == 0) {
dev_err(&pdev->dev,
@ -2974,18 +3042,52 @@ static int ena_calc_io_queue_num(struct pci_dev *pdev,
return io_queue_num;
}
static void ena_set_push_mode(struct pci_dev *pdev, struct ena_com_dev *ena_dev,
struct ena_com_dev_get_features_ctx *get_feat_ctx)
static int ena_set_queues_placement_policy(struct pci_dev *pdev,
struct ena_com_dev *ena_dev,
struct ena_admin_feature_llq_desc *llq,
struct ena_llq_configurations *llq_default_configurations)
{
bool has_mem_bar;
int rc;
u32 llq_feature_mask;
llq_feature_mask = 1 << ENA_ADMIN_LLQ;
if (!(ena_dev->supported_features & llq_feature_mask)) {
dev_err(&pdev->dev,
"LLQ is not supported Fallback to host mode policy.\n");
ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
return 0;
}
has_mem_bar = pci_select_bars(pdev, IORESOURCE_MEM) & BIT(ENA_MEM_BAR);
/* Enable push mode if device supports LLQ */
if (has_mem_bar && (get_feat_ctx->max_queues.max_llq_num > 0))
ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
else
rc = ena_com_config_dev_mode(ena_dev, llq, llq_default_configurations);
if (unlikely(rc)) {
dev_err(&pdev->dev,
"Failed to configure the device mode. Fallback to host mode policy.\n");
ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
return 0;
}
/* Nothing to config, exit */
if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
return 0;
if (!has_mem_bar) {
dev_err(&pdev->dev,
"ENA device does not expose LLQ bar. Fallback to host mode policy.\n");
ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
return 0;
}
ena_dev->mem_bar = devm_ioremap_wc(&pdev->dev,
pci_resource_start(pdev, ENA_MEM_BAR),
pci_resource_len(pdev, ENA_MEM_BAR));
if (!ena_dev->mem_bar)
return -EFAULT;
return 0;
}
static void ena_set_dev_offloads(struct ena_com_dev_get_features_ctx *feat,
@ -3110,6 +3212,15 @@ static void ena_release_bars(struct ena_com_dev *ena_dev, struct pci_dev *pdev)
pci_release_selected_regions(pdev, release_bars);
}
static inline void set_default_llq_configurations(struct ena_llq_configurations *llq_config)
{
llq_config->llq_header_location = ENA_ADMIN_INLINE_HEADER;
llq_config->llq_ring_entry_size = ENA_ADMIN_LIST_ENTRY_SIZE_128B;
llq_config->llq_stride_ctrl = ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY;
llq_config->llq_num_decs_before_header = ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2;
llq_config->llq_ring_entry_size_value = 128;
}
static int ena_calc_queue_size(struct pci_dev *pdev,
struct ena_com_dev *ena_dev,
u16 *max_tx_sgl_size,
@ -3125,7 +3236,7 @@ static int ena_calc_queue_size(struct pci_dev *pdev,
if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
queue_size = min_t(u32, queue_size,
get_feat_ctx->max_queues.max_llq_depth);
get_feat_ctx->max_queues.max_legacy_llq_depth);
queue_size = rounddown_pow_of_two(queue_size);
@ -3158,7 +3269,9 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
static int version_printed;
struct net_device *netdev;
struct ena_adapter *adapter;
struct ena_llq_configurations llq_config;
struct ena_com_dev *ena_dev = NULL;
char *queue_type_str;
static int adapters_found;
int io_queue_num, bars, rc;
int queue_size;
@ -3212,17 +3325,14 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto err_free_region;
}
ena_set_push_mode(pdev, ena_dev, &get_feat_ctx);
set_default_llq_configurations(&llq_config);
if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
ena_dev->mem_bar = devm_ioremap_wc(&pdev->dev,
pci_resource_start(pdev, ENA_MEM_BAR),
pci_resource_len(pdev, ENA_MEM_BAR));
if (!ena_dev->mem_bar) {
rc = -EFAULT;
rc = ena_set_queues_placement_policy(pdev, ena_dev, &get_feat_ctx.llq,
&llq_config);
if (rc) {
dev_err(&pdev->dev, "ena device init failed\n");
goto err_device_destroy;
}
}
/* initial Tx interrupt delay, Assumes 1 usec granularity.
* Updated during device initialization with the real granularity
@ -3236,8 +3346,10 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto err_device_destroy;
}
dev_info(&pdev->dev, "creating %d io queues. queue size: %d\n",
io_queue_num, queue_size);
dev_info(&pdev->dev, "creating %d io queues. queue size: %d. LLQ is %s\n",
io_queue_num, queue_size,
(ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) ?
"ENABLED" : "DISABLED");
/* dev zeroed in init_etherdev */
netdev = alloc_etherdev_mq(sizeof(struct ena_adapter), io_queue_num);
@ -3327,9 +3439,15 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
timer_setup(&adapter->timer_service, ena_timer_service, 0);
mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
dev_info(&pdev->dev, "%s found at mem %lx, mac addr %pM Queues %d\n",
if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_HOST)
queue_type_str = "Regular";
else
queue_type_str = "Low Latency";
dev_info(&pdev->dev,
"%s found at mem %lx, mac addr %pM Queues %d, Placement policy: %s\n",
DEVICE_NAME, (long)pci_resource_start(pdev, 0),
netdev->dev_addr, io_queue_num);
netdev->dev_addr, io_queue_num, queue_type_str);
set_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);

42
drivers/net/ethernet/amazon/ena/ena_netdev.h
View File

@ -43,9 +43,9 @@
#include "ena_com.h"
#include "ena_eth_com.h"
#define DRV_MODULE_VER_MAJOR 1
#define DRV_MODULE_VER_MINOR 5
#define DRV_MODULE_VER_SUBMINOR 0
#define DRV_MODULE_VER_MAJOR 2
#define DRV_MODULE_VER_MINOR 0
#define DRV_MODULE_VER_SUBMINOR 1
#define DRV_MODULE_NAME "ena"
#ifndef DRV_MODULE_VERSION
@ -61,6 +61,17 @@
#define ENA_ADMIN_MSIX_VEC 1
#define ENA_MAX_MSIX_VEC(io_queues) (ENA_ADMIN_MSIX_VEC + (io_queues))
/* The ENA buffer length fields is 16 bit long. So when PAGE_SIZE == 64kB the
* driver passes 0.
* Since the max packet size the ENA handles is ~9kB limit the buffer length to
* 16kB.
*/
#if PAGE_SIZE > SZ_16K
#define ENA_PAGE_SIZE SZ_16K
#else
#define ENA_PAGE_SIZE PAGE_SIZE
#endif
#define ENA_MIN_MSIX_VEC 2
#define ENA_REG_BAR 0
@ -70,7 +81,7 @@
#define ENA_DEFAULT_RING_SIZE (1024)
#define ENA_TX_WAKEUP_THRESH (MAX_SKB_FRAGS + 2)
#define ENA_DEFAULT_RX_COPYBREAK (128 - NET_IP_ALIGN)
#define ENA_DEFAULT_RX_COPYBREAK (256 - NET_IP_ALIGN)
/* limit the buffer size to 600 bytes to handle MTU changes from very
* small to very large, in which case the number of buffers per packet
@ -95,10 +106,11 @@
*/
#define ENA_TX_POLL_BUDGET_DIVIDER 4
/* Refill Rx queue when number of available descriptors is below
* QUEUE_SIZE / ENA_RX_REFILL_THRESH_DIVIDER
/* Refill Rx queue when number of required descriptors is above
* QUEUE_SIZE / ENA_RX_REFILL_THRESH_DIVIDER or ENA_RX_REFILL_THRESH_PACKET
*/
#define ENA_RX_REFILL_THRESH_DIVIDER 8
#define ENA_RX_REFILL_THRESH_PACKET 256
/* Number of queues to check for missing queues per timer service */
#define ENA_MONITORED_TX_QUEUES 4
@ -151,6 +163,9 @@ struct ena_tx_buffer {
/* num of buffers used by this skb */
u32 num_of_bufs;
/* Indicate if bufs[0] map the linear data of the skb. */
u8 map_linear_data;
/* Used for detect missing tx packets to limit the number of prints */
u32 print_once;
/* Save the last jiffies to detect missing tx packets
@ -186,6 +201,7 @@ struct ena_stats_tx {
u64 tx_poll;
u64 doorbells;
u64 bad_req_id;
u64 llq_buffer_copy;
u64 missed_tx;
};
@ -201,6 +217,7 @@ struct ena_stats_rx {
u64 rx_copybreak_pkt;
u64 bad_req_id;
u64 empty_rx_ring;
u64 csum_unchecked;
};
struct ena_ring {
@ -257,6 +274,8 @@ struct ena_ring {
struct ena_stats_tx tx_stats;
struct ena_stats_rx rx_stats;
};
u8 *push_buf_intermediate_buf;
int empty_rx_queue;
} ____cacheline_aligned;
@ -355,15 +374,4 @@ void ena_dump_stats_to_buf(struct ena_adapter *adapter, u8 *buf);
int ena_get_sset_count(struct net_device *netdev, int sset);
/* The ENA buffer length fields is 16 bit long. So when PAGE_SIZE == 64kB the
* driver passas 0.
* Since the max packet size the ENA handles is ~9kB limit the buffer length to
* 16kB.
*/
#if PAGE_SIZE > SZ_16K
#define ENA_PAGE_SIZE SZ_16K
#else
#define ENA_PAGE_SIZE PAGE_SIZE
#endif
#endif /* !(ENA_H) */

16
drivers/net/ethernet/amazon/ena/ena_regs_defs.h
View File

@ -34,37 +34,25 @@
enum ena_regs_reset_reason_types {
ENA_REGS_RESET_NORMAL = 0,
ENA_REGS_RESET_KEEP_ALIVE_TO = 1,
ENA_REGS_RESET_ADMIN_TO = 2,
ENA_REGS_RESET_MISS_TX_CMPL = 3,
ENA_REGS_RESET_INV_RX_REQ_ID = 4,
ENA_REGS_RESET_INV_TX_REQ_ID = 5,
ENA_REGS_RESET_TOO_MANY_RX_DESCS = 6,
ENA_REGS_RESET_INIT_ERR = 7,
ENA_REGS_RESET_DRIVER_INVALID_STATE = 8,
ENA_REGS_RESET_OS_TRIGGER = 9,
ENA_REGS_RESET_OS_NETDEV_WD = 10,
ENA_REGS_RESET_SHUTDOWN = 11,
ENA_REGS_RESET_USER_TRIGGER = 12,
ENA_REGS_RESET_GENERIC = 13,
ENA_REGS_RESET_MISS_INTERRUPT = 14,
};
/* ena_registers offsets */
/* 0 base */
#define ENA_REGS_VERSION_OFF 0x0
#define ENA_REGS_CONTROLLER_VERSION_OFF 0x4
#define ENA_REGS_CAPS_OFF 0x8