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443 lines
10 KiB
443 lines
10 KiB
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ |
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/* |
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* Copyright 2015-2020 Amazon.com, Inc. or its affiliates. All rights reserved. |
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*/ |
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#ifndef ENA_H |
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#define ENA_H |
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#include <linux/bitops.h> |
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#include <linux/dim.h> |
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#include <linux/etherdevice.h> |
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#include <linux/if_vlan.h> |
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#include <linux/inetdevice.h> |
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#include <linux/interrupt.h> |
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#include <linux/netdevice.h> |
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#include <linux/skbuff.h> |
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#include "ena_com.h" |
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#include "ena_eth_com.h" |
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#define DRV_MODULE_GEN_MAJOR 2 |
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#define DRV_MODULE_GEN_MINOR 1 |
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#define DRV_MODULE_GEN_SUBMINOR 0 |
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#define DRV_MODULE_NAME "ena" |
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#define DEVICE_NAME "Elastic Network Adapter (ENA)" |
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/* 1 for AENQ + ADMIN */ |
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#define ENA_ADMIN_MSIX_VEC 1 |
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#define ENA_MAX_MSIX_VEC(io_queues) (ENA_ADMIN_MSIX_VEC + (io_queues)) |
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/* The ENA buffer length fields is 16 bit long. So when PAGE_SIZE == 64kB the |
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* driver passes 0. |
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* Since the max packet size the ENA handles is ~9kB limit the buffer length to |
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* 16kB. |
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*/ |
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#if PAGE_SIZE > SZ_16K |
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#define ENA_PAGE_SIZE (_AC(SZ_16K, UL)) |
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#else |
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#define ENA_PAGE_SIZE PAGE_SIZE |
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#endif |
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#define ENA_MIN_MSIX_VEC 2 |
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#define ENA_REG_BAR 0 |
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#define ENA_MEM_BAR 2 |
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#define ENA_BAR_MASK (BIT(ENA_REG_BAR) | BIT(ENA_MEM_BAR)) |
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#define ENA_DEFAULT_RING_SIZE (1024) |
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#define ENA_MIN_RING_SIZE (256) |
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#define ENA_MIN_NUM_IO_QUEUES (1) |
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#define ENA_TX_WAKEUP_THRESH (MAX_SKB_FRAGS + 2) |
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#define ENA_DEFAULT_RX_COPYBREAK (256 - NET_IP_ALIGN) |
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#define ENA_MIN_MTU 128 |
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#define ENA_NAME_MAX_LEN 20 |
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#define ENA_IRQNAME_SIZE 40 |
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#define ENA_PKT_MAX_BUFS 19 |
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#define ENA_RX_RSS_TABLE_LOG_SIZE 7 |
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#define ENA_RX_RSS_TABLE_SIZE (1 << ENA_RX_RSS_TABLE_LOG_SIZE) |
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/* The number of tx packet completions that will be handled each NAPI poll |
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* cycle is ring_size / ENA_TX_POLL_BUDGET_DIVIDER. |
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*/ |
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#define ENA_TX_POLL_BUDGET_DIVIDER 4 |
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/* Refill Rx queue when number of required descriptors is above |
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* QUEUE_SIZE / ENA_RX_REFILL_THRESH_DIVIDER or ENA_RX_REFILL_THRESH_PACKET |
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*/ |
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#define ENA_RX_REFILL_THRESH_DIVIDER 8 |
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#define ENA_RX_REFILL_THRESH_PACKET 256 |
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/* Number of queues to check for missing queues per timer service */ |
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#define ENA_MONITORED_TX_QUEUES 4 |
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/* Max timeout packets before device reset */ |
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#define MAX_NUM_OF_TIMEOUTED_PACKETS 128 |
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#define ENA_TX_RING_IDX_NEXT(idx, ring_size) (((idx) + 1) & ((ring_size) - 1)) |
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#define ENA_RX_RING_IDX_NEXT(idx, ring_size) (((idx) + 1) & ((ring_size) - 1)) |
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#define ENA_RX_RING_IDX_ADD(idx, n, ring_size) \ |
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(((idx) + (n)) & ((ring_size) - 1)) |
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#define ENA_IO_TXQ_IDX(q) (2 * (q)) |
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#define ENA_IO_RXQ_IDX(q) (2 * (q) + 1) |
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#define ENA_IO_TXQ_IDX_TO_COMBINED_IDX(q) ((q) / 2) |
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#define ENA_IO_RXQ_IDX_TO_COMBINED_IDX(q) (((q) - 1) / 2) |
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#define ENA_MGMNT_IRQ_IDX 0 |
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#define ENA_IO_IRQ_FIRST_IDX 1 |
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#define ENA_IO_IRQ_IDX(q) (ENA_IO_IRQ_FIRST_IDX + (q)) |
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#define ENA_ADMIN_POLL_DELAY_US 100 |
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/* ENA device should send keep alive msg every 1 sec. |
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* We wait for 6 sec just to be on the safe side. |
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*/ |
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#define ENA_DEVICE_KALIVE_TIMEOUT (6 * HZ) |
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#define ENA_MAX_NO_INTERRUPT_ITERATIONS 3 |
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#define ENA_MMIO_DISABLE_REG_READ BIT(0) |
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/* The max MTU size is configured to be the ethernet frame size without |
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* the overhead of the ethernet header, which can have a VLAN header, and |
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* a frame check sequence (FCS). |
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* The buffer size we share with the device is defined to be ENA_PAGE_SIZE |
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*/ |
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#define ENA_XDP_MAX_MTU (ENA_PAGE_SIZE - ETH_HLEN - ETH_FCS_LEN - \ |
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VLAN_HLEN - XDP_PACKET_HEADROOM - \ |
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SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) |
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#define ENA_IS_XDP_INDEX(adapter, index) (((index) >= (adapter)->xdp_first_ring) && \ |
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((index) < (adapter)->xdp_first_ring + (adapter)->xdp_num_queues)) |
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struct ena_irq { |
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irq_handler_t handler; |
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void *data; |
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int cpu; |
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u32 vector; |
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cpumask_t affinity_hint_mask; |
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char name[ENA_IRQNAME_SIZE]; |
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}; |
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struct ena_napi { |
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u8 first_interrupt ____cacheline_aligned; |
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u8 interrupts_masked; |
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struct napi_struct napi; |
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struct ena_ring *tx_ring; |
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struct ena_ring *rx_ring; |
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struct ena_ring *xdp_ring; |
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u32 qid; |
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struct dim dim; |
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}; |
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struct ena_calc_queue_size_ctx { |
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struct ena_com_dev_get_features_ctx *get_feat_ctx; |
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struct ena_com_dev *ena_dev; |
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struct pci_dev *pdev; |
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u32 tx_queue_size; |
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u32 rx_queue_size; |
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u32 max_tx_queue_size; |
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u32 max_rx_queue_size; |
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u16 max_tx_sgl_size; |
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u16 max_rx_sgl_size; |
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}; |
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struct ena_tx_buffer { |
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struct sk_buff *skb; |
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/* num of ena desc for this specific skb |
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* (includes data desc and metadata desc) |
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*/ |
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u32 tx_descs; |
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/* num of buffers used by this skb */ |
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u32 num_of_bufs; |
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/* XDP buffer structure which is used for sending packets in |
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* the xdp queues |
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*/ |
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struct xdp_frame *xdpf; |
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/* Indicate if bufs[0] map the linear data of the skb. */ |
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u8 map_linear_data; |
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/* Used for detect missing tx packets to limit the number of prints */ |
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u32 print_once; |
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/* Save the last jiffies to detect missing tx packets |
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* |
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* sets to non zero value on ena_start_xmit and set to zero on |
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* napi and timer_Service_routine. |
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* |
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* while this value is not protected by lock, |
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* a given packet is not expected to be handled by ena_start_xmit |
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* and by napi/timer_service at the same time. |
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*/ |
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unsigned long last_jiffies; |
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struct ena_com_buf bufs[ENA_PKT_MAX_BUFS]; |
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} ____cacheline_aligned; |
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struct ena_rx_buffer { |
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struct sk_buff *skb; |
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struct page *page; |
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u32 page_offset; |
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struct ena_com_buf ena_buf; |
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} ____cacheline_aligned; |
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struct ena_stats_tx { |
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u64 cnt; |
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u64 bytes; |
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u64 queue_stop; |
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u64 prepare_ctx_err; |
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u64 queue_wakeup; |
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u64 dma_mapping_err; |
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u64 linearize; |
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u64 linearize_failed; |
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u64 napi_comp; |
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u64 tx_poll; |
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u64 doorbells; |
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u64 bad_req_id; |
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u64 llq_buffer_copy; |
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u64 missed_tx; |
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u64 unmask_interrupt; |
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u64 last_napi_jiffies; |
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}; |
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struct ena_stats_rx { |
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u64 cnt; |
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u64 bytes; |
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u64 rx_copybreak_pkt; |
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u64 csum_good; |
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u64 refil_partial; |
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u64 bad_csum; |
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u64 page_alloc_fail; |
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u64 skb_alloc_fail; |
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u64 dma_mapping_err; |
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u64 bad_desc_num; |
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u64 bad_req_id; |
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u64 empty_rx_ring; |
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u64 csum_unchecked; |
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u64 xdp_aborted; |
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u64 xdp_drop; |
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u64 xdp_pass; |
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u64 xdp_tx; |
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u64 xdp_invalid; |
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u64 xdp_redirect; |
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}; |
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struct ena_ring { |
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/* Holds the empty requests for TX/RX |
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* out of order completions |
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*/ |
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u16 *free_ids; |
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union { |
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struct ena_tx_buffer *tx_buffer_info; |
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struct ena_rx_buffer *rx_buffer_info; |
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}; |
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/* cache ptr to avoid using the adapter */ |
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struct device *dev; |
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struct pci_dev *pdev; |
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struct napi_struct *napi; |
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struct net_device *netdev; |
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struct ena_com_dev *ena_dev; |
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struct ena_adapter *adapter; |
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struct ena_com_io_cq *ena_com_io_cq; |
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struct ena_com_io_sq *ena_com_io_sq; |
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struct bpf_prog *xdp_bpf_prog; |
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struct xdp_rxq_info xdp_rxq; |
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spinlock_t xdp_tx_lock; /* synchronize XDP TX/Redirect traffic */ |
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/* Used for rx queues only to point to the xdp tx ring, to |
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* which traffic should be redirected from this rx ring. |
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*/ |
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struct ena_ring *xdp_ring; |
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u16 next_to_use; |
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u16 next_to_clean; |
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u16 rx_copybreak; |
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u16 rx_headroom; |
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u16 qid; |
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u16 mtu; |
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u16 sgl_size; |
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/* The maximum header length the device can handle */ |
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u8 tx_max_header_size; |
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bool disable_meta_caching; |
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u16 no_interrupt_event_cnt; |
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/* cpu for TPH */ |
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int cpu; |
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/* number of tx/rx_buffer_info's entries */ |
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int ring_size; |
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enum ena_admin_placement_policy_type tx_mem_queue_type; |
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struct ena_com_rx_buf_info ena_bufs[ENA_PKT_MAX_BUFS]; |
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u32 smoothed_interval; |
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u32 per_napi_packets; |
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u16 non_empty_napi_events; |
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struct u64_stats_sync syncp; |
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union { |
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struct ena_stats_tx tx_stats; |
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struct ena_stats_rx rx_stats; |
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}; |
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u8 *push_buf_intermediate_buf; |
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int empty_rx_queue; |
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} ____cacheline_aligned; |
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struct ena_stats_dev { |
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u64 tx_timeout; |
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u64 suspend; |
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u64 resume; |
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u64 wd_expired; |
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u64 interface_up; |
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u64 interface_down; |
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u64 admin_q_pause; |
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u64 rx_drops; |
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u64 tx_drops; |
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}; |
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enum ena_flags_t { |
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ENA_FLAG_DEVICE_RUNNING, |
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ENA_FLAG_DEV_UP, |
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ENA_FLAG_LINK_UP, |
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ENA_FLAG_MSIX_ENABLED, |
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ENA_FLAG_TRIGGER_RESET, |
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ENA_FLAG_ONGOING_RESET |
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}; |
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/* adapter specific private data structure */ |
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struct ena_adapter { |
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struct ena_com_dev *ena_dev; |
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/* OS defined structs */ |
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struct net_device *netdev; |
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struct pci_dev *pdev; |
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/* rx packets that shorter that this len will be copied to the skb |
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* header |
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*/ |
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u32 rx_copybreak; |
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u32 max_mtu; |
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u32 num_io_queues; |
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u32 max_num_io_queues; |
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int msix_vecs; |
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u32 missing_tx_completion_threshold; |
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u32 requested_tx_ring_size; |
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u32 requested_rx_ring_size; |
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u32 max_tx_ring_size; |
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u32 max_rx_ring_size; |
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u32 msg_enable; |
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u16 max_tx_sgl_size; |
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u16 max_rx_sgl_size; |
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u8 mac_addr[ETH_ALEN]; |
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unsigned long keep_alive_timeout; |
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unsigned long missing_tx_completion_to; |
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char name[ENA_NAME_MAX_LEN]; |
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unsigned long flags; |
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/* TX */ |
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struct ena_ring tx_ring[ENA_MAX_NUM_IO_QUEUES] |
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____cacheline_aligned_in_smp; |
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/* RX */ |
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struct ena_ring rx_ring[ENA_MAX_NUM_IO_QUEUES] |
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____cacheline_aligned_in_smp; |
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struct ena_napi ena_napi[ENA_MAX_NUM_IO_QUEUES]; |
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struct ena_irq irq_tbl[ENA_MAX_MSIX_VEC(ENA_MAX_NUM_IO_QUEUES)]; |
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/* timer service */ |
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struct work_struct reset_task; |
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struct timer_list timer_service; |
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bool wd_state; |
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bool dev_up_before_reset; |
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bool disable_meta_caching; |
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unsigned long last_keep_alive_jiffies; |
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struct u64_stats_sync syncp; |
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struct ena_stats_dev dev_stats; |
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struct ena_admin_eni_stats eni_stats; |
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bool eni_stats_supported; |
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/* last queue index that was checked for uncompleted tx packets */ |
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u32 last_monitored_tx_qid; |
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enum ena_regs_reset_reason_types reset_reason; |
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struct bpf_prog *xdp_bpf_prog; |
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u32 xdp_first_ring; |
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u32 xdp_num_queues; |
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}; |
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void ena_set_ethtool_ops(struct net_device *netdev); |
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void ena_dump_stats_to_dmesg(struct ena_adapter *adapter); |
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void ena_dump_stats_to_buf(struct ena_adapter *adapter, u8 *buf); |
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int ena_update_hw_stats(struct ena_adapter *adapter); |
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int ena_update_queue_sizes(struct ena_adapter *adapter, |
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u32 new_tx_size, |
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u32 new_rx_size); |
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int ena_update_queue_count(struct ena_adapter *adapter, u32 new_channel_count); |
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int ena_get_sset_count(struct net_device *netdev, int sset); |
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enum ena_xdp_errors_t { |
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ENA_XDP_ALLOWED = 0, |
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ENA_XDP_CURRENT_MTU_TOO_LARGE, |
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ENA_XDP_NO_ENOUGH_QUEUES, |
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}; |
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static inline bool ena_xdp_present(struct ena_adapter *adapter) |
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{ |
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return !!adapter->xdp_bpf_prog; |
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} |
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static inline bool ena_xdp_present_ring(struct ena_ring *ring) |
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{ |
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return !!ring->xdp_bpf_prog; |
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} |
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static inline bool ena_xdp_legal_queue_count(struct ena_adapter *adapter, |
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u32 queues) |
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{ |
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return 2 * queues <= adapter->max_num_io_queues; |
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} |
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static inline enum ena_xdp_errors_t ena_xdp_allowed(struct ena_adapter *adapter) |
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{ |
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enum ena_xdp_errors_t rc = ENA_XDP_ALLOWED; |
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if (adapter->netdev->mtu > ENA_XDP_MAX_MTU) |
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rc = ENA_XDP_CURRENT_MTU_TOO_LARGE; |
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else if (!ena_xdp_legal_queue_count(adapter, adapter->num_io_queues)) |
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rc = ENA_XDP_NO_ENOUGH_QUEUES; |
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return rc; |
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} |
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#endif /* !(ENA_H) */
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