1 /* SPDX-License-Identifier: (GPL-2.0 OR MIT)
4  * Copyright (C) 2015-2024 Google LLC
10 #include <linux/dma-mapping.h>
35 /* 1 for management, 1 for rx, 1 for tx */
38 /* Numbers of gve tx/rx stats in stats report. */
45 /* Numbers of NIC tx/rx stats in stats report. */
51 #define GVE_DATA_SLOT_ADDR_PAGE_MASK (~(PAGE_SIZE - 1))
73 	(GVE_ADMINQ_BUFFER_SIZE / sizeof(((struct gve_adminq_queried_flow_rule *)0)->location))
91 /* 2K buffers for DQO-QPL */
97  * allocs and uses a non-qpl page on the receive path of DQO QPL to free
110 /* The page info for a single slot in the RX data queue */
123 	u16 pad; /* adjustment for rx padding */
127 /* A list of pages registered with the device during setup and used by a queue
142 	struct gve_queue_page_list *qpl; /* qpl assigned to this queue */
148 /* RX buffer queue for posting buffers to HW.
149  * Each RX (completion) queue has a corresponding buffer queue.
159 /* RX completion queue to receive packets from HW. */
165 	 * post more buffers than the queue size to avoid HW overrunning the
166 	 * queue.
204 	/* Linked list index to next element in the list, or -1 if none */
208 /* `head` and `tail` are indices into an array, or -1 if empty. */
234 /* Contains datapath state used to represent an RX queue. */
239 	u16 packet_buffer_truesize;	/* Total size of RX buffer */
265 			 * buf_states, or -1 if empty.
270 			 * buf_states, or -1 if empty.
282 			 * buf_states, or -1 if empty.
289 			/* qpl assigned to this queue */
292 			/* index into queue page list */
298 			/* Address info of the buffers for header-split */
305 	u64 rbytes; /* free-running bytes received */
306 	u64 rx_hsplit_bytes; /* free-running header bytes received */
307 	u64 rpackets; /* free-running packets received */
308 	u32 cnt; /* free-running total number of completed packets */
309 	u32 fill_cnt; /* free-running total number of descs and buffs posted */
311 	u64 rx_hsplit_pkt; /* free-running packets with headers split */
312 	u64 rx_copybreak_pkt; /* free-running count of copybreak packets */
313 	u64 rx_copied_pkt; /* free-running total number of copied packets */
314 	u64 rx_skb_alloc_fail; /* free-running count of skb alloc fails */
315 	u64 rx_buf_alloc_fail; /* free-running count of buffer alloc fails */
316 	u64 rx_desc_err_dropped_pkt; /* free-running count of packets dropped by descriptor error */
317 	/* free-running count of unsplit packets due to header buffer overflow or hdr_len is 0 */
319 	u64 rx_cont_packet_cnt; /* free-running multi-fragment packets received */
320 	u64 rx_frag_flip_cnt; /* free-running count of rx segments where page_flip was used */
321 	u64 rx_frag_copy_cnt; /* free-running count of rx segments copied */
322 	u64 rx_frag_alloc_cnt; /* free-running count of rx page allocations */
327 	u32 q_num; /* queue index */
330 	dma_addr_t q_resources_bus; /* dma address for the queue resources */
376 /* A TX buffer - each queue has one */
400 	 * re-injection completion.
440 	/* Linked list index to next element in the list, or -1 if none */
443 	/* Linked list index to prev element in the list, or -1 if none.
458 	 * freed if the corresponding re-injection completion is not received
464 /* Contains datapath state used to represent a TX queue. */
466 	/* Cacheline 0 -- Accessed & dirtied during transmit */
481 			 * pending_packets, or -1 if empty.
507 				* tx_qpl_buf_next, or -1 if empty.
529 	/* Cacheline 1 -- Accessed & dirtied during gve_clean_tx_done */
547 			 * pending_packets, or -1 if empty.
576 				 * tx_qpl_buf_next, or -1 if empty.
592 	u64 pkt_done; /* free-running - total packets completed */
593 	u64 bytes_done; /* free-running - total bytes completed */
594 	u64 dropped_pkt; /* free-running - total packets dropped */
597 	/* Cacheline 2 -- Read-mostly fields */
621 				/* qpl assigned to this queue */
638 	u32 mask; /* masks req and done down to queue size */
641 	/* Slow-path fields */
642 	u32 q_num ____cacheline_aligned; /* queue idx */
643 	u32 stop_queue; /* count of queue stops */
644 	u32 wake_queue; /* count of queue wakes */
645 	u32 queue_timeout; /* count of queue timeouts */
647 	u32 last_kick_msec; /* Last time the queue was kicked */
649 	dma_addr_t q_resources_bus; /* dma address of the queue resources */
667 	struct gve_rx_ring *rx; /* rx rings on this block */  member
671 /* Tracks allowed and current rx queue settings */
678 /* Tracks allowed and current tx queue settings */
717 /* Parameters for allocating resources for rx queues */
731 	struct gve_rx_ring *rx;  member
793 	struct gve_rx_ring *rx; /* array of rx_cfg.num_queues */  member
821 	unsigned long *xsk_pools; /* bitmap of RX queues with XSK pools */
822 	u32 num_ntfy_blks; /* split between TX and RX so must be even */
833 	/* Admin queue - see gve_adminq.h*/
839 	u32 adminq_prod_cnt; /* free-running count of AQ cmds executed */
840 	u32 adminq_cmd_fail; /* free-running count of AQ cmds failed */
841 	u32 adminq_timeouts; /* free-running count of AQ cmds timeouts */
842 	/* free-running count of per AQ cmd executed */
869 	u32 stats_report_trigger_cnt; /* count of device-requested stats-reports since last reset */
901 	u16 header_buf_size; /* device configured, header-split supported if non-zero */
943 	return test_bit(GVE_PRIV_FLAGS_DO_RESET, &priv->service_task_flags);  in gve_get_do_reset()
948 	set_bit(GVE_PRIV_FLAGS_DO_RESET, &priv->service_task_flags);  in gve_set_do_reset()
953 	clear_bit(GVE_PRIV_FLAGS_DO_RESET, &priv->service_task_flags);  in gve_clear_do_reset()
959 			&priv->service_task_flags);  in gve_get_reset_in_progress()
964 	set_bit(GVE_PRIV_FLAGS_RESET_IN_PROGRESS, &priv->service_task_flags);  in gve_set_reset_in_progress()
969 	clear_bit(GVE_PRIV_FLAGS_RESET_IN_PROGRESS, &priv->service_task_flags);  in gve_clear_reset_in_progress()
975 			&priv->service_task_flags);  in gve_get_probe_in_progress()
980 	set_bit(GVE_PRIV_FLAGS_PROBE_IN_PROGRESS, &priv->service_task_flags);  in gve_set_probe_in_progress()
985 	clear_bit(GVE_PRIV_FLAGS_PROBE_IN_PROGRESS, &priv->service_task_flags);  in gve_clear_probe_in_progress()
991 			&priv->service_task_flags);  in gve_get_do_report_stats()
996 	set_bit(GVE_PRIV_FLAGS_DO_REPORT_STATS, &priv->service_task_flags);  in gve_set_do_report_stats()
1001 	clear_bit(GVE_PRIV_FLAGS_DO_REPORT_STATS, &priv->service_task_flags);  in gve_clear_do_report_stats()
1006 	return test_bit(GVE_PRIV_FLAGS_ADMIN_QUEUE_OK, &priv->state_flags);  in gve_get_admin_queue_ok()
1011 	set_bit(GVE_PRIV_FLAGS_ADMIN_QUEUE_OK, &priv->state_flags);  in gve_set_admin_queue_ok()
1016 	clear_bit(GVE_PRIV_FLAGS_ADMIN_QUEUE_OK, &priv->state_flags);  in gve_clear_admin_queue_ok()
1021 	return test_bit(GVE_PRIV_FLAGS_DEVICE_RESOURCES_OK, &priv->state_flags);  in gve_get_device_resources_ok()
1026 	set_bit(GVE_PRIV_FLAGS_DEVICE_RESOURCES_OK, &priv->state_flags);  in gve_set_device_resources_ok()
1031 	clear_bit(GVE_PRIV_FLAGS_DEVICE_RESOURCES_OK, &priv->state_flags);  in gve_clear_device_resources_ok()
1036 	return test_bit(GVE_PRIV_FLAGS_DEVICE_RINGS_OK, &priv->state_flags);  in gve_get_device_rings_ok()
1041 	set_bit(GVE_PRIV_FLAGS_DEVICE_RINGS_OK, &priv->state_flags);  in gve_set_device_rings_ok()
1046 	clear_bit(GVE_PRIV_FLAGS_DEVICE_RINGS_OK, &priv->state_flags);  in gve_clear_device_rings_ok()
1051 	return test_bit(GVE_PRIV_FLAGS_NAPI_ENABLED, &priv->state_flags);  in gve_get_napi_enabled()
1056 	set_bit(GVE_PRIV_FLAGS_NAPI_ENABLED, &priv->state_flags);  in gve_set_napi_enabled()
1061 	clear_bit(GVE_PRIV_FLAGS_NAPI_ENABLED, &priv->state_flags);  in gve_clear_napi_enabled()
1066 	return test_bit(GVE_PRIV_FLAGS_REPORT_STATS, &priv->ethtool_flags);  in gve_get_report_stats()
1071 	clear_bit(GVE_PRIV_FLAGS_REPORT_STATS, &priv->ethtool_flags);  in gve_clear_report_stats()
1079 	return &priv->db_bar2[be32_to_cpu(*block->irq_db_index)];  in gve_irq_doorbell()
1089 /* Returns the index into ntfy_blocks of the given rx ring's block
1093 	return (priv->num_ntfy_blks / 2) + queue_idx;  in gve_rx_idx_to_ntfy()
1098 	return priv->queue_format == GVE_GQI_QPL_FORMAT ||  in gve_is_qpl()
1099 		priv->queue_format == GVE_DQO_QPL_FORMAT;  in gve_is_qpl()
1102 /* Returns the number of tx queue page lists */
1108 	return tx_cfg->num_queues + tx_cfg->num_xdp_queues;  in gve_num_tx_qpls()
1111 /* Returns the number of rx queue page lists */
1117 	return rx_cfg->num_queues;  in gve_num_rx_qpls()
1127 	return priv->tx_cfg.max_queues + rx_qid;  in gve_rx_qpl_id()
1133 	return tx_cfg->max_queues + rx_qid;  in gve_get_rx_qpl_id()
1149 	 * out-of-order completions. Set it to two times of ring size.  in gve_get_rx_pages_per_qpl_dqo()
1154 /* Returns the correct dma direction for tx and rx qpls */
1158 	if (id < gve_rx_start_qpl_id(&priv->tx_cfg))  in gve_qpl_dma_dir()
1166 	return priv->queue_format == GVE_GQI_RDA_FORMAT ||  in gve_is_gqi()
1167 		priv->queue_format == GVE_GQI_QPL_FORMAT;  in gve_is_gqi()
1172 	return priv->tx_cfg.num_queues + priv->tx_cfg.num_xdp_queues;  in gve_num_tx_queues()
1177 	return priv->tx_cfg.num_queues + queue_id;  in gve_xdp_tx_queue_id()
1187 	switch (priv->queue_format) {  in gve_supports_xdp_xmit()
1234 /* rx handling */
1235 void gve_rx_write_doorbell(struct gve_priv *priv, struct gve_rx_ring *rx);
1237 bool gve_rx_work_pending(struct gve_rx_ring *rx);
1240 			  struct gve_rx_ring *rx,
1242 void gve_rx_free_ring_gqi(struct gve_priv *priv, struct gve_rx_ring *rx,
1253 /* rx buffer handling */
1257 struct gve_rx_buf_state_dqo *gve_alloc_buf_state(struct gve_rx_ring *rx);
1258 bool gve_buf_state_is_allocated(struct gve_rx_ring *rx,
1260 void gve_free_buf_state(struct gve_rx_ring *rx,
1262 struct gve_rx_buf_state_dqo *gve_dequeue_buf_state(struct gve_rx_ring *rx,
1264 void gve_enqueue_buf_state(struct gve_rx_ring *rx, struct gve_index_list *list,
1266 struct gve_rx_buf_state_dqo *gve_get_recycled_buf_state(struct gve_rx_ring *rx);
1267 void gve_try_recycle_buf(struct gve_priv *priv, struct gve_rx_ring *rx,
1269 void gve_free_to_page_pool(struct gve_rx_ring *rx,
1272 int gve_alloc_qpl_page_dqo(struct gve_rx_ring *rx,
1275 void gve_reuse_buffer(struct gve_rx_ring *rx,
1277 void gve_free_buffer(struct gve_rx_ring *rx,
1279 int gve_alloc_buffer(struct gve_rx_ring *rx, struct gve_rx_desc_dqo *desc);
1281 					  struct gve_rx_ring *rx,
1313 	return -EOPNOTSUPP;  in gve_clock_nic_ts_read()