#define EFX_TXQ_TYPES 4
#define EFX_MAX_TX_QUEUES (EFX_TXQ_TYPES * EFX_MAX_CHANNELS)
+/* Maximum possible MTU the driver supports */
+#define EFX_MAX_MTU (9 * 1024)
+
+/* Size of an RX scatter buffer. Small enough to pack 2 into a 4K page. */
+#define EFX_RX_USR_BUF_SIZE 1824
+
/* Forward declare Precision Time Protocol (PTP) support structure. */
struct efx_ptp_data;
/**
* struct efx_rx_buffer - An Efx RX data buffer
* @dma_addr: DMA base address of the buffer
- * @skb: The associated socket buffer. Valid iff !(@flags & %EFX_RX_BUF_PAGE).
- * Will be %NULL if the buffer slot is currently free.
- * @page: The associated page buffer. Valif iff @flags & %EFX_RX_BUF_PAGE.
+ * @page: The associated page buffer.
* Will be %NULL if the buffer slot is currently free.
- * @page_offset: Offset within page. Valid iff @flags & %EFX_RX_BUF_PAGE.
- * @len: Buffer length, in bytes.
- * @flags: Flags for buffer and packet state.
+ * @page_offset: If pending: offset in @page of DMA base address.
+ * If completed: offset in @page of Ethernet header.
+ * @len: If pending: length for DMA descriptor.
+ * If completed: received length, excluding hash prefix.
+ * @flags: Flags for buffer and packet state. These are only set on the
+ * first buffer of a scattered packet.
*/
struct efx_rx_buffer {
dma_addr_t dma_addr;
- union {
- struct sk_buff *skb;
- struct page *page;
- } u;
+ struct page *page;
u16 page_offset;
u16 len;
u16 flags;
};
-#define EFX_RX_BUF_PAGE 0x0001
+#define EFX_RX_BUF_LAST_IN_PAGE 0x0001
#define EFX_RX_PKT_CSUMMED 0x0002
#define EFX_RX_PKT_DISCARD 0x0004
* @added_count: Number of buffers added to the receive queue.
* @notified_count: Number of buffers given to NIC (<= @added_count).
* @removed_count: Number of buffers removed from the receive queue.
+ * @scatter_n: Number of buffers used by current packet
+ * @page_ring: The ring to store DMA mapped pages for reuse.
+ * @page_add: Counter to calculate the write pointer for the recycle ring.
+ * @page_remove: Counter to calculate the read pointer for the recycle ring.
+ * @page_recycle_count: The number of pages that have been recycled.
+ * @page_recycle_failed: The number of pages that couldn't be recycled because
+ * the kernel still held a reference to them.
+ * @page_recycle_full: The number of pages that were released because the
+ * recycle ring was full.
+ * @page_ptr_mask: The number of pages in the RX recycle ring minus 1.
* @max_fill: RX descriptor maximum fill level (<= ring size)
* @fast_fill_trigger: RX descriptor fill level that will trigger a fast fill
* (<= @max_fill)
* @min_fill: RX descriptor minimum non-zero fill level.
* This records the minimum fill level observed when a ring
* refill was triggered.
- * @alloc_page_count: RX allocation strategy counter.
- * @alloc_skb_count: RX allocation strategy counter.
+ * @recycle_count: RX buffer recycle counter.
* @slow_fill: Timer used to defer efx_nic_generate_fill_event().
*/
struct efx_rx_queue {
bool enabled;
bool flush_pending;
- int added_count;
- int notified_count;
- int removed_count;
+ unsigned int added_count;
+ unsigned int notified_count;
+ unsigned int removed_count;
+ unsigned int scatter_n;
+ struct page **page_ring;
+ unsigned int page_add;
+ unsigned int page_remove;
+ unsigned int page_recycle_count;
+ unsigned int page_recycle_failed;
+ unsigned int page_recycle_full;
+ unsigned int page_ptr_mask;
unsigned int max_fill;
unsigned int fast_fill_trigger;
unsigned int min_fill;
unsigned int min_overfill;
- unsigned int alloc_page_count;
- unsigned int alloc_skb_count;
+ unsigned int recycle_count;
struct timer_list slow_fill;
unsigned int slow_fill_count;
};
* @event_test_cpu: Last CPU to handle interrupt or test event for this channel
* @irq_count: Number of IRQs since last adaptive moderation decision
* @irq_mod_score: IRQ moderation score
- * @rx_alloc_level: Watermark based heuristic counter for pushing descriptors
- * and diagnostic counters
- * @rx_alloc_push_pages: RX allocation method currently in use for pushing
- * descriptors
* @n_rx_tobe_disc: Count of RX_TOBE_DISC errors
* @n_rx_ip_hdr_chksum_err: Count of RX IP header checksum errors
* @n_rx_tcp_udp_chksum_err: Count of RX TCP and UDP checksum errors
* @n_rx_frm_trunc: Count of RX_FRM_TRUNC errors
* @n_rx_overlength: Count of RX_OVERLENGTH errors
* @n_skbuff_leaks: Count of skbuffs leaked due to RX overrun
+ * @n_rx_nodesc_trunc: Number of RX packets truncated and then dropped due to
+ * lack of descriptors
+ * @rx_pkt_n_frags: Number of fragments in next packet to be delivered by
+ * __efx_rx_packet(), or zero if there is none
+ * @rx_pkt_index: Ring index of first buffer for next packet to be delivered
+ * by __efx_rx_packet(), if @rx_pkt_n_frags != 0
* @rx_queue: RX queue for this channel
* @tx_queue: TX queues for this channel
*/
unsigned int rfs_filters_added;
#endif
- int rx_alloc_level;
- int rx_alloc_push_pages;
-
unsigned n_rx_tobe_disc;
unsigned n_rx_ip_hdr_chksum_err;
unsigned n_rx_tcp_udp_chksum_err;
unsigned n_rx_frm_trunc;
unsigned n_rx_overlength;
unsigned n_skbuff_leaks;
+ unsigned int n_rx_nodesc_trunc;
- /* Used to pipeline received packets in order to optimise memory
- * access with prefetches.
- */
- struct efx_rx_buffer *rx_pkt;
+ unsigned int rx_pkt_n_frags;
+ unsigned int rx_pkt_index;
struct efx_rx_queue rx_queue;
struct efx_tx_queue tx_queue[EFX_TXQ_TYPES];
void (*post_remove)(struct efx_channel *);
void (*get_name)(struct efx_channel *, char *buf, size_t len);
struct efx_channel *(*copy)(const struct efx_channel *);
- void (*receive_skb)(struct efx_channel *, struct sk_buff *);
+ bool (*receive_skb)(struct efx_channel *, struct sk_buff *);
bool keep_eventq;
};
STATE_UNINIT = 0, /* device being probed/removed or is frozen */
STATE_READY = 1, /* hardware ready and netdev registered */
STATE_DISABLED = 2, /* device disabled due to hardware errors */
+ STATE_RECOVERY = 3, /* device recovering from PCI error */
};
/*
* @n_channels: Number of channels in use
* @n_rx_channels: Number of channels used for RX (= number of RX queues)
* @n_tx_channels: Number of channels used for TX
- * @rx_buffer_len: RX buffer length
+ * @rx_dma_len: Current maximum RX DMA length
* @rx_buffer_order: Order (log2) of number of pages for each RX buffer
+ * @rx_buffer_truesize: Amortised allocation size of an RX buffer,
+ * for use in sk_buff::truesize
* @rx_hash_key: Toeplitz hash key for RSS
* @rx_indir_table: Indirection table for RSS
+ * @rx_scatter: Scatter mode enabled for receives
* @int_error_count: Number of internal errors seen recently
* @int_error_expire: Time at which error count will be expired
* @irq_status: Interrupt status buffer
unsigned rss_spread;
unsigned tx_channel_offset;
unsigned n_tx_channels;
- unsigned int rx_buffer_len;
+ unsigned int rx_dma_len;
unsigned int rx_buffer_order;
+ unsigned int rx_buffer_truesize;
+ unsigned int rx_page_buf_step;
+ unsigned int rx_bufs_per_page;
+ unsigned int rx_pages_per_batch;
u8 rx_hash_key[40];
u32 rx_indir_table[128];
+ bool rx_scatter;
unsigned int_error_count;
unsigned long int_error_expire;
* @evq_ptr_tbl_base: Event queue pointer table base address
* @evq_rptr_tbl_base: Event queue read-pointer table base address
* @max_dma_mask: Maximum possible DMA mask
- * @rx_buffer_hash_size: Size of hash at start of RX buffer
- * @rx_buffer_padding: Size of padding at end of RX buffer
+ * @rx_buffer_hash_size: Size of hash at start of RX packet
+ * @rx_buffer_padding: Size of padding at end of RX packet
+ * @can_rx_scatter: NIC is able to scatter packet to multiple buffers
* @max_interrupt_mode: Highest capability interrupt mode supported
* from &enum efx_init_mode.
* @phys_addr_channels: Number of channels with physically addressed
u64 max_dma_mask;
unsigned int rx_buffer_hash_size;
unsigned int rx_buffer_padding;
+ bool can_rx_scatter;
unsigned int max_interrupt_mode;
unsigned int phys_addr_channels;
unsigned int timer_period_max;
projects / firefly-linux-kernel-4.4.55.git / blobdiff