454 lines
11 KiB
C
454 lines
11 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
|
||
|
|
/*
|
||
|
|
* Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef ENA_H
|
||
|
|
#define ENA_H
|
||
|
|
|
||
|
|
#include <linux/bitops.h>
|
||
|
|
#include <linux/dim.h>
|
||
|
|
#include <linux/etherdevice.h>
|
||
|
|
#include <linux/if_vlan.h>
|
||
|
|
#include <linux/inetdevice.h>
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <linux/netdevice.h>
|
||
|
|
#include <linux/skbuff.h>
|
||
|
|
#include <uapi/linux/bpf.h>
|
||
|
|
|
||
|
|
#include "ena_com.h"
|
||
|
|
#include "ena_eth_com.h"
|
||
|
|
|
||
|
|
#define DRV_MODULE_GEN_MAJOR 2
|
||
|
|
#define DRV_MODULE_GEN_MINOR 1
|
||
|
|
#define DRV_MODULE_GEN_SUBMINOR 0
|
||
|
|
|
||
|
|
#define DRV_MODULE_NAME "ena"
|
||
|
|
|
||
|
|
#define DEVICE_NAME "Elastic Network Adapter (ENA)"
|
||
|
|
|
||
|
|
/* 1 for AENQ + ADMIN */
|
||
|
|
#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 (_AC(SZ_16K, UL))
|
||
|
|
#else
|
||
|
|
#define ENA_PAGE_SIZE PAGE_SIZE
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define ENA_MIN_MSIX_VEC 2
|
||
|
|
|
||
|
|
#define ENA_REG_BAR 0
|
||
|
|
#define ENA_MEM_BAR 2
|
||
|
|
#define ENA_BAR_MASK (BIT(ENA_REG_BAR) | BIT(ENA_MEM_BAR))
|
||
|
|
|
||
|
|
#define ENA_DEFAULT_RING_SIZE (1024)
|
||
|
|
#define ENA_MIN_RING_SIZE (256)
|
||
|
|
|
||
|
|
#define ENA_MIN_NUM_IO_QUEUES (1)
|
||
|
|
|
||
|
|
#define ENA_TX_WAKEUP_THRESH (MAX_SKB_FRAGS + 2)
|
||
|
|
#define ENA_DEFAULT_RX_COPYBREAK (256 - NET_IP_ALIGN)
|
||
|
|
|
||
|
|
#define ENA_MIN_MTU 128
|
||
|
|
|
||
|
|
#define ENA_NAME_MAX_LEN 20
|
||
|
|
#define ENA_IRQNAME_SIZE 40
|
||
|
|
|
||
|
|
#define ENA_PKT_MAX_BUFS 19
|
||
|
|
|
||
|
|
#define ENA_RX_RSS_TABLE_LOG_SIZE 7
|
||
|
|
#define ENA_RX_RSS_TABLE_SIZE (1 << ENA_RX_RSS_TABLE_LOG_SIZE)
|
||
|
|
|
||
|
|
/* The number of tx packet completions that will be handled each NAPI poll
|
||
|
|
* cycle is ring_size / ENA_TX_POLL_BUDGET_DIVIDER.
|
||
|
|
*/
|
||
|
|
#define ENA_TX_POLL_BUDGET_DIVIDER 4
|
||
|
|
|
||
|
|
/* 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
|
||
|
|
/* Max timeout packets before device reset */
|
||
|
|
#define MAX_NUM_OF_TIMEOUTED_PACKETS 128
|
||
|
|
|
||
|
|
#define ENA_TX_RING_IDX_NEXT(idx, ring_size) (((idx) + 1) & ((ring_size) - 1))
|
||
|
|
|
||
|
|
#define ENA_RX_RING_IDX_NEXT(idx, ring_size) (((idx) + 1) & ((ring_size) - 1))
|
||
|
|
#define ENA_RX_RING_IDX_ADD(idx, n, ring_size) \
|
||
|
|
(((idx) + (n)) & ((ring_size) - 1))
|
||
|
|
|
||
|
|
#define ENA_IO_TXQ_IDX(q) (2 * (q))
|
||
|
|
#define ENA_IO_RXQ_IDX(q) (2 * (q) + 1)
|
||
|
|
#define ENA_IO_TXQ_IDX_TO_COMBINED_IDX(q) ((q) / 2)
|
||
|
|
#define ENA_IO_RXQ_IDX_TO_COMBINED_IDX(q) (((q) - 1) / 2)
|
||
|
|
|
||
|
|
#define ENA_MGMNT_IRQ_IDX 0
|
||
|
|
#define ENA_IO_IRQ_FIRST_IDX 1
|
||
|
|
#define ENA_IO_IRQ_IDX(q) (ENA_IO_IRQ_FIRST_IDX + (q))
|
||
|
|
|
||
|
|
#define ENA_ADMIN_POLL_DELAY_US 100
|
||
|
|
|
||
|
|
/* ENA device should send keep alive msg every 1 sec.
|
||
|
|
* We wait for 6 sec just to be on the safe side.
|
||
|
|
*/
|
||
|
|
#define ENA_DEVICE_KALIVE_TIMEOUT (6 * HZ)
|
||
|
|
#define ENA_MAX_NO_INTERRUPT_ITERATIONS 3
|
||
|
|
|
||
|
|
#define ENA_MMIO_DISABLE_REG_READ BIT(0)
|
||
|
|
|
||
|
|
/* The max MTU size is configured to be the ethernet frame size without
|
||
|
|
* the overhead of the ethernet header, which can have a VLAN header, and
|
||
|
|
* a frame check sequence (FCS).
|
||
|
|
* The buffer size we share with the device is defined to be ENA_PAGE_SIZE
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define ENA_XDP_MAX_MTU (ENA_PAGE_SIZE - ETH_HLEN - ETH_FCS_LEN - \
|
||
|
|
VLAN_HLEN - XDP_PACKET_HEADROOM - \
|
||
|
|
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
|
||
|
|
|
||
|
|
#define ENA_IS_XDP_INDEX(adapter, index) (((index) >= (adapter)->xdp_first_ring) && \
|
||
|
|
((index) < (adapter)->xdp_first_ring + (adapter)->xdp_num_queues))
|
||
|
|
|
||
|
|
struct ena_irq {
|
||
|
|
irq_handler_t handler;
|
||
|
|
void *data;
|
||
|
|
int cpu;
|
||
|
|
u32 vector;
|
||
|
|
cpumask_t affinity_hint_mask;
|
||
|
|
char name[ENA_IRQNAME_SIZE];
|
||
|
|
};
|
||
|
|
|
||
|
|
struct ena_napi {
|
||
|
|
u8 first_interrupt ____cacheline_aligned;
|
||
|
|
u8 interrupts_masked;
|
||
|
|
struct napi_struct napi;
|
||
|
|
struct ena_ring *tx_ring;
|
||
|
|
struct ena_ring *rx_ring;
|
||
|
|
struct ena_ring *xdp_ring;
|
||
|
|
u32 qid;
|
||
|
|
struct dim dim;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct ena_tx_buffer {
|
||
|
|
struct sk_buff *skb;
|
||
|
|
/* num of ena desc for this specific skb
|
||
|
|
* (includes data desc and metadata desc)
|
||
|
|
*/
|
||
|
|
u32 tx_descs;
|
||
|
|
/* num of buffers used by this skb */
|
||
|
|
u32 num_of_bufs;
|
||
|
|
|
||
|
|
/* XDP buffer structure which is used for sending packets in
|
||
|
|
* the xdp queues
|
||
|
|
*/
|
||
|
|
struct xdp_frame *xdpf;
|
||
|
|
|
||
|
|
/* 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
|
||
|
|
*
|
||
|
|
* sets to non zero value on ena_start_xmit and set to zero on
|
||
|
|
* napi and timer_Service_routine.
|
||
|
|
*
|
||
|
|
* while this value is not protected by lock,
|
||
|
|
* a given packet is not expected to be handled by ena_start_xmit
|
||
|
|
* and by napi/timer_service at the same time.
|
||
|
|
*/
|
||
|
|
unsigned long last_jiffies;
|
||
|
|
struct ena_com_buf bufs[ENA_PKT_MAX_BUFS];
|
||
|
|
} ____cacheline_aligned;
|
||
|
|
|
||
|
|
struct ena_rx_buffer {
|
||
|
|
struct sk_buff *skb;
|
||
|
|
struct page *page;
|
||
|
|
u32 page_offset;
|
||
|
|
struct ena_com_buf ena_buf;
|
||
|
|
} ____cacheline_aligned;
|
||
|
|
|
||
|
|
struct ena_stats_tx {
|
||
|
|
u64 cnt;
|
||
|
|
u64 bytes;
|
||
|
|
u64 queue_stop;
|
||
|
|
u64 prepare_ctx_err;
|
||
|
|
u64 queue_wakeup;
|
||
|
|
u64 dma_mapping_err;
|
||
|
|
u64 linearize;
|
||
|
|
u64 linearize_failed;
|
||
|
|
u64 napi_comp;
|
||
|
|
u64 tx_poll;
|
||
|
|
u64 doorbells;
|
||
|
|
u64 bad_req_id;
|
||
|
|
u64 llq_buffer_copy;
|
||
|
|
u64 missed_tx;
|
||
|
|
u64 unmask_interrupt;
|
||
|
|
u64 last_napi_jiffies;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct ena_stats_rx {
|
||
|
|
u64 cnt;
|
||
|
|
u64 bytes;
|
||
|
|
u64 rx_copybreak_pkt;
|
||
|
|
u64 csum_good;
|
||
|
|
u64 refil_partial;
|
||
|
|
u64 csum_bad;
|
||
|
|
u64 page_alloc_fail;
|
||
|
|
u64 skb_alloc_fail;
|
||
|
|
u64 dma_mapping_err;
|
||
|
|
u64 bad_desc_num;
|
||
|
|
u64 bad_req_id;
|
||
|
|
u64 empty_rx_ring;
|
||
|
|
u64 csum_unchecked;
|
||
|
|
u64 xdp_aborted;
|
||
|
|
u64 xdp_drop;
|
||
|
|
u64 xdp_pass;
|
||
|
|
u64 xdp_tx;
|
||
|
|
u64 xdp_invalid;
|
||
|
|
u64 xdp_redirect;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct ena_ring {
|
||
|
|
/* Holds the empty requests for TX/RX
|
||
|
|
* out of order completions
|
||
|
|
*/
|
||
|
|
u16 *free_ids;
|
||
|
|
|
||
|
|
union {
|
||
|
|
struct ena_tx_buffer *tx_buffer_info;
|
||
|
|
struct ena_rx_buffer *rx_buffer_info;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* cache ptr to avoid using the adapter */
|
||
|
|
struct device *dev;
|
||
|
|
struct pci_dev *pdev;
|
||
|
|
struct napi_struct *napi;
|
||
|
|
struct net_device *netdev;
|
||
|
|
struct ena_com_dev *ena_dev;
|
||
|
|
struct ena_adapter *adapter;
|
||
|
|
struct ena_com_io_cq *ena_com_io_cq;
|
||
|
|
struct ena_com_io_sq *ena_com_io_sq;
|
||
|
|
struct bpf_prog *xdp_bpf_prog;
|
||
|
|
struct xdp_rxq_info xdp_rxq;
|
||
|
|
spinlock_t xdp_tx_lock; /* synchronize XDP TX/Redirect traffic */
|
||
|
|
/* Used for rx queues only to point to the xdp tx ring, to
|
||
|
|
* which traffic should be redirected from this rx ring.
|
||
|
|
*/
|
||
|
|
struct ena_ring *xdp_ring;
|
||
|
|
|
||
|
|
u16 next_to_use;
|
||
|
|
u16 next_to_clean;
|
||
|
|
u16 rx_copybreak;
|
||
|
|
u16 rx_headroom;
|
||
|
|
u16 qid;
|
||
|
|
u16 mtu;
|
||
|
|
u16 sgl_size;
|
||
|
|
|
||
|
|
/* The maximum header length the device can handle */
|
||
|
|
u8 tx_max_header_size;
|
||
|
|
|
||
|
|
bool disable_meta_caching;
|
||
|
|
u16 no_interrupt_event_cnt;
|
||
|
|
|
||
|
|
/* cpu and NUMA for TPH */
|
||
|
|
int cpu;
|
||
|
|
int numa_node;
|
||
|
|
|
||
|
|
/* number of tx/rx_buffer_info's entries */
|
||
|
|
int ring_size;
|
||
|
|
|
||
|
|
enum ena_admin_placement_policy_type tx_mem_queue_type;
|
||
|
|
|
||
|
|
struct ena_com_rx_buf_info ena_bufs[ENA_PKT_MAX_BUFS];
|
||
|
|
u32 smoothed_interval;
|
||
|
|
u32 per_napi_packets;
|
||
|
|
u16 non_empty_napi_events;
|
||
|
|
struct u64_stats_sync syncp;
|
||
|
|
union {
|
||
|
|
struct ena_stats_tx tx_stats;
|
||
|
|
struct ena_stats_rx rx_stats;
|
||
|
|
};
|
||
|
|
|
||
|
|
u8 *push_buf_intermediate_buf;
|
||
|
|
int empty_rx_queue;
|
||
|
|
} ____cacheline_aligned;
|
||
|
|
|
||
|
|
struct ena_stats_dev {
|
||
|
|
u64 tx_timeout;
|
||
|
|
u64 suspend;
|
||
|
|
u64 resume;
|
||
|
|
u64 wd_expired;
|
||
|
|
u64 interface_up;
|
||
|
|
u64 interface_down;
|
||
|
|
u64 admin_q_pause;
|
||
|
|
u64 rx_drops;
|
||
|
|
u64 tx_drops;
|
||
|
|
};
|
||
|
|
|
||
|
|
enum ena_flags_t {
|
||
|
|
ENA_FLAG_DEVICE_RUNNING,
|
||
|
|
ENA_FLAG_DEV_UP,
|
||
|
|
ENA_FLAG_LINK_UP,
|
||
|
|
ENA_FLAG_MSIX_ENABLED,
|
||
|
|
ENA_FLAG_TRIGGER_RESET,
|
||
|
|
ENA_FLAG_ONGOING_RESET
|
||
|
|
};
|
||
|
|
|
||
|
|
/* adapter specific private data structure */
|
||
|
|
struct ena_adapter {
|
||
|
|
struct ena_com_dev *ena_dev;
|
||
|
|
/* OS defined structs */
|
||
|
|
struct net_device *netdev;
|
||
|
|
struct pci_dev *pdev;
|
||
|
|
|
||
|
|
/* rx packets that shorter that this len will be copied to the skb
|
||
|
|
* header
|
||
|
|
*/
|
||
|
|
u32 rx_copybreak;
|
||
|
|
u32 max_mtu;
|
||
|
|
|
||
|
|
u32 num_io_queues;
|
||
|
|
u32 max_num_io_queues;
|
||
|
|
|
||
|
|
int msix_vecs;
|
||
|
|
|
||
|
|
u32 missing_tx_completion_threshold;
|
||
|
|
|
||
|
|
u32 requested_tx_ring_size;
|
||
|
|
u32 requested_rx_ring_size;
|
||
|
|
|
||
|
|
u32 max_tx_ring_size;
|
||
|
|
u32 max_rx_ring_size;
|
||
|
|
|
||
|
|
u32 msg_enable;
|
||
|
|
|
||
|
|
u16 max_tx_sgl_size;
|
||
|
|
u16 max_rx_sgl_size;
|
||
|
|
|
||
|
|
u8 mac_addr[ETH_ALEN];
|
||
|
|
|
||
|
|
unsigned long keep_alive_timeout;
|
||
|
|
unsigned long missing_tx_completion_to;
|
||
|
|
|
||
|
|
char name[ENA_NAME_MAX_LEN];
|
||
|
|
|
||
|
|
unsigned long flags;
|
||
|
|
/* TX */
|
||
|
|
struct ena_ring tx_ring[ENA_MAX_NUM_IO_QUEUES]
|
||
|
|
____cacheline_aligned_in_smp;
|
||
|
|
|
||
|
|
/* RX */
|
||
|
|
struct ena_ring rx_ring[ENA_MAX_NUM_IO_QUEUES]
|
||
|
|
____cacheline_aligned_in_smp;
|
||
|
|
|
||
|
|
struct ena_napi ena_napi[ENA_MAX_NUM_IO_QUEUES];
|
||
|
|
|
||
|
|
struct ena_irq irq_tbl[ENA_MAX_MSIX_VEC(ENA_MAX_NUM_IO_QUEUES)];
|
||
|
|
|
||
|
|
/* timer service */
|
||
|
|
struct work_struct reset_task;
|
||
|
|
struct timer_list timer_service;
|
||
|
|
|
||
|
|
bool wd_state;
|
||
|
|
bool dev_up_before_reset;
|
||
|
|
bool disable_meta_caching;
|
||
|
|
unsigned long last_keep_alive_jiffies;
|
||
|
|
|
||
|
|
struct u64_stats_sync syncp;
|
||
|
|
struct ena_stats_dev dev_stats;
|
||
|
|
struct ena_admin_eni_stats eni_stats;
|
||
|
|
|
||
|
|
/* last queue index that was checked for uncompleted tx packets */
|
||
|
|
u32 last_monitored_tx_qid;
|
||
|
|
|
||
|
|
enum ena_regs_reset_reason_types reset_reason;
|
||
|
|
|
||
|
|
struct bpf_prog *xdp_bpf_prog;
|
||
|
|
u32 xdp_first_ring;
|
||
|
|
u32 xdp_num_queues;
|
||
|
|
};
|
||
|
|
|
||
|
|
void ena_set_ethtool_ops(struct net_device *netdev);
|
||
|
|
|
||
|
|
void ena_dump_stats_to_dmesg(struct ena_adapter *adapter);
|
||
|
|
|
||
|
|
void ena_dump_stats_to_buf(struct ena_adapter *adapter, u8 *buf);
|
||
|
|
|
||
|
|
int ena_update_hw_stats(struct ena_adapter *adapter);
|
||
|
|
|
||
|
|
int ena_update_queue_sizes(struct ena_adapter *adapter,
|
||
|
|
u32 new_tx_size,
|
||
|
|
u32 new_rx_size);
|
||
|
|
|
||
|
|
int ena_update_queue_count(struct ena_adapter *adapter, u32 new_channel_count);
|
||
|
|
|
||
|
|
int ena_set_rx_copybreak(struct ena_adapter *adapter, u32 rx_copybreak);
|
||
|
|
|
||
|
|
int ena_get_sset_count(struct net_device *netdev, int sset);
|
||
|
|
|
||
|
|
static inline void ena_reset_device(struct ena_adapter *adapter,
|
||
|
|
enum ena_regs_reset_reason_types reset_reason)
|
||
|
|
{
|
||
|
|
adapter->reset_reason = reset_reason;
|
||
|
|
/* Make sure reset reason is set before triggering the reset */
|
||
|
|
smp_mb__before_atomic();
|
||
|
|
set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
enum ena_xdp_errors_t {
|
||
|
|
ENA_XDP_ALLOWED = 0,
|
||
|
|
ENA_XDP_CURRENT_MTU_TOO_LARGE,
|
||
|
|
ENA_XDP_NO_ENOUGH_QUEUES,
|
||
|
|
};
|
||
|
|
|
||
|
|
enum ENA_XDP_ACTIONS {
|
||
|
|
ENA_XDP_PASS = 0,
|
||
|
|
ENA_XDP_TX = BIT(0),
|
||
|
|
ENA_XDP_REDIRECT = BIT(1),
|
||
|
|
ENA_XDP_DROP = BIT(2)
|
||
|
|
};
|
||
|
|
|
||
|
|
#define ENA_XDP_FORWARDED (ENA_XDP_TX | ENA_XDP_REDIRECT)
|
||
|
|
|
||
|
|
static inline bool ena_xdp_present(struct ena_adapter *adapter)
|
||
|
|
{
|
||
|
|
return !!adapter->xdp_bpf_prog;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline bool ena_xdp_present_ring(struct ena_ring *ring)
|
||
|
|
{
|
||
|
|
return !!ring->xdp_bpf_prog;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline bool ena_xdp_legal_queue_count(struct ena_adapter *adapter,
|
||
|
|
u32 queues)
|
||
|
|
{
|
||
|
|
return 2 * queues <= adapter->max_num_io_queues;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline enum ena_xdp_errors_t ena_xdp_allowed(struct ena_adapter *adapter)
|
||
|
|
{
|
||
|
|
enum ena_xdp_errors_t rc = ENA_XDP_ALLOWED;
|
||
|
|
|
||
|
|
if (adapter->netdev->mtu > ENA_XDP_MAX_MTU)
|
||
|
|
rc = ENA_XDP_CURRENT_MTU_TOO_LARGE;
|
||
|
|
else if (!ena_xdp_legal_queue_count(adapter, adapter->num_io_queues))
|
||
|
|
rc = ENA_XDP_NO_ENOUGH_QUEUES;
|
||
|
|
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* !(ENA_H) */
|