| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Catherine Sullivan | 1820 | 69.10% | 12 | 33.33% |
| Bailey Forrest | 466 | 17.69% | 9 | 25.00% |
| Kuo Zhao | 204 | 7.74% | 2 | 5.56% |
| David Awogbemila | 47 | 1.78% | 5 | 13.89% |
| Shailend Chand | 45 | 1.71% | 1 | 2.78% |
| Tao Liu | 13 | 0.49% | 2 | 5.56% |
| Arnd Bergmann | 11 | 0.42% | 1 | 2.78% |
| Yangchun Fu | 11 | 0.42% | 1 | 2.78% |
| John Fraker | 9 | 0.34% | 1 | 2.78% |
| Willem de Bruijn | 5 | 0.19% | 1 | 2.78% |
| Jeroen de Borst | 3 | 0.11% | 1 | 2.78% |
| Total | 2634 | 36 |
/* SPDX-License-Identifier: (GPL-2.0 OR MIT) * Google virtual Ethernet (gve) driver * * Copyright (C) 2015-2021 Google, Inc. */ #ifndef _GVE_H_ #define _GVE_H_ #include <linux/dma-mapping.h> #include <linux/netdevice.h> #include <linux/pci.h> #include <linux/u64_stats_sync.h> #include "gve_desc.h" #include "gve_desc_dqo.h" #ifndef PCI_VENDOR_ID_GOOGLE #define PCI_VENDOR_ID_GOOGLE 0x1ae0 #endif #define PCI_DEV_ID_GVNIC 0x0042 #define GVE_REGISTER_BAR 0 #define GVE_DOORBELL_BAR 2 /* Driver can alloc up to 2 segments for the header and 2 for the payload. */ #define GVE_TX_MAX_IOVEC 4 /* 1 for management, 1 for rx, 1 for tx */ #define GVE_MIN_MSIX 3 /* Numbers of gve tx/rx stats in stats report. */ #define GVE_TX_STATS_REPORT_NUM 6 #define GVE_RX_STATS_REPORT_NUM 2 /* Interval to schedule a stats report update, 20000ms. */ #define GVE_STATS_REPORT_TIMER_PERIOD 20000 /* Numbers of NIC tx/rx stats in stats report. */ #define NIC_TX_STATS_REPORT_NUM 0 #define NIC_RX_STATS_REPORT_NUM 4 #define GVE_DATA_SLOT_ADDR_PAGE_MASK (~(PAGE_SIZE - 1)) /* PTYPEs are always 10 bits. */ #define GVE_NUM_PTYPES 1024 #define GVE_RX_BUFFER_SIZE_DQO 2048 /* Each slot in the desc ring has a 1:1 mapping to a slot in the data ring */ struct gve_rx_desc_queue { struct gve_rx_desc *desc_ring; /* the descriptor ring */ dma_addr_t bus; /* the bus for the desc_ring */ u8 seqno; /* the next expected seqno for this desc*/ }; /* The page info for a single slot in the RX data queue */ struct gve_rx_slot_page_info { struct page *page; void *page_address; u32 page_offset; /* offset to write to in page */ int pagecnt_bias; /* expected pagecnt if only the driver has a ref */ u16 pad; /* adjustment for rx padding */ u8 can_flip; /* tracks if the networking stack is using the page */ }; /* A list of pages registered with the device during setup and used by a queue * as buffers */ struct gve_queue_page_list { u32 id; /* unique id */ u32 num_entries; struct page **pages; /* list of num_entries pages */ dma_addr_t *page_buses; /* the dma addrs of the pages */ }; /* Each slot in the data ring has a 1:1 mapping to a slot in the desc ring */ struct gve_rx_data_queue { union gve_rx_data_slot *data_ring; /* read by NIC */ dma_addr_t data_bus; /* dma mapping of the slots */ struct gve_rx_slot_page_info *page_info; /* page info of the buffers */ struct gve_queue_page_list *qpl; /* qpl assigned to this queue */ u8 raw_addressing; /* use raw_addressing? */ }; struct gve_priv; /* RX buffer queue for posting buffers to HW. * Each RX (completion) queue has a corresponding buffer queue. */ struct gve_rx_buf_queue_dqo { struct gve_rx_desc_dqo *desc_ring; dma_addr_t bus; u32 head; /* Pointer to start cleaning buffers at. */ u32 tail; /* Last posted buffer index + 1 */ u32 mask; /* Mask for indices to the size of the ring */ }; /* RX completion queue to receive packets from HW. */ struct gve_rx_compl_queue_dqo { struct gve_rx_compl_desc_dqo *desc_ring; dma_addr_t bus; /* Number of slots which did not have a buffer posted yet. We should not * post more buffers than the queue size to avoid HW overrunning the * queue. */ int num_free_slots; /* HW uses a "generation bit" to notify SW of new descriptors. When a * descriptor's generation bit is different from the current generation, * that descriptor is ready to be consumed by SW. */ u8 cur_gen_bit; /* Pointer into desc_ring where the next completion descriptor will be * received. */ u32 head; u32 mask; /* Mask for indices to the size of the ring */ }; /* Stores state for tracking buffers posted to HW */ struct gve_rx_buf_state_dqo { /* The page posted to HW. */ struct gve_rx_slot_page_info page_info; /* The DMA address corresponding to `page_info`. */ dma_addr_t addr; /* Last offset into the page when it only had a single reference, at * which point every other offset is free to be reused. */ u32 last_single_ref_offset; /* Linked list index to next element in the list, or -1 if none */ s16 next; }; /* `head` and `tail` are indices into an array, or -1 if empty. */ struct gve_index_list { s16 head; s16 tail; }; /* A single received packet split across multiple buffers may be * reconstructed using the information in this structure. */ struct gve_rx_ctx { /* head and tail of skb chain for the current packet or NULL if none */ struct sk_buff *skb_head; struct sk_buff *skb_tail; u32 total_size; u8 frag_cnt; bool drop_pkt; }; struct gve_rx_cnts { u32 ok_pkt_bytes; u16 ok_pkt_cnt; u16 total_pkt_cnt; u16 cont_pkt_cnt; u16 desc_err_pkt_cnt; }; /* Contains datapath state used to represent an RX queue. */ struct gve_rx_ring { struct gve_priv *gve; union { /* GQI fields */ struct { struct gve_rx_desc_queue desc; struct gve_rx_data_queue data; /* threshold for posting new buffs and descs */ u32 db_threshold; u16 packet_buffer_size; u32 qpl_copy_pool_mask; u32 qpl_copy_pool_head; struct gve_rx_slot_page_info *qpl_copy_pool; }; /* DQO fields. */ struct { struct gve_rx_buf_queue_dqo bufq; struct gve_rx_compl_queue_dqo complq; struct gve_rx_buf_state_dqo *buf_states; u16 num_buf_states; /* Linked list of gve_rx_buf_state_dqo. Index into * buf_states, or -1 if empty. */ s16 free_buf_states; /* Linked list of gve_rx_buf_state_dqo. Indexes into * buf_states, or -1 if empty. * * This list contains buf_states which are pointing to * valid buffers. * * We use a FIFO here in order to increase the * probability that buffers can be reused by increasing * the time between usages. */ struct gve_index_list recycled_buf_states; /* Linked list of gve_rx_buf_state_dqo. Indexes into * buf_states, or -1 if empty. * * This list contains buf_states which have buffers * which cannot be reused yet. */ struct gve_index_list used_buf_states; } dqo; }; u64 rbytes; /* free-running bytes received */ u64 rpackets; /* free-running packets received */ u32 cnt; /* free-running total number of completed packets */ u32 fill_cnt; /* free-running total number of descs and buffs posted */ u32 mask; /* masks the cnt and fill_cnt to the size of the ring */ u64 rx_copybreak_pkt; /* free-running count of copybreak packets */ u64 rx_copied_pkt; /* free-running total number of copied packets */ u64 rx_skb_alloc_fail; /* free-running count of skb alloc fails */ u64 rx_buf_alloc_fail; /* free-running count of buffer alloc fails */ u64 rx_desc_err_dropped_pkt; /* free-running count of packets dropped by descriptor error */ u64 rx_cont_packet_cnt; /* free-running multi-fragment packets received */ u64 rx_frag_flip_cnt; /* free-running count of rx segments where page_flip was used */ u64 rx_frag_copy_cnt; /* free-running count of rx segments copied */ u64 rx_frag_alloc_cnt; /* free-running count of rx page allocations */ u32 q_num; /* queue index */ u32 ntfy_id; /* notification block index */ struct gve_queue_resources *q_resources; /* head and tail pointer idx */ dma_addr_t q_resources_bus; /* dma address for the queue resources */ struct u64_stats_sync statss; /* sync stats for 32bit archs */ struct gve_rx_ctx ctx; /* Info for packet currently being processed in this ring. */ }; /* A TX desc ring entry */ union gve_tx_desc { struct gve_tx_pkt_desc pkt; /* first desc for a packet */ struct gve_tx_mtd_desc mtd; /* optional metadata descriptor */ struct gve_tx_seg_desc seg; /* subsequent descs for a packet */ }; /* Tracks the memory in the fifo occupied by a segment of a packet */ struct gve_tx_iovec { u32 iov_offset; /* offset into this segment */ u32 iov_len; /* length */ u32 iov_padding; /* padding associated with this segment */ }; /* Tracks the memory in the fifo occupied by the skb. Mapped 1:1 to a desc * ring entry but only used for a pkt_desc not a seg_desc */ struct gve_tx_buffer_state { struct sk_buff *skb; /* skb for this pkt */ union { struct gve_tx_iovec iov[GVE_TX_MAX_IOVEC]; /* segments of this pkt */ struct { DEFINE_DMA_UNMAP_ADDR(dma); DEFINE_DMA_UNMAP_LEN(len); }; }; }; /* A TX buffer - each queue has one */ struct gve_tx_fifo { void *base; /* address of base of FIFO */ u32 size; /* total size */ atomic_t available; /* how much space is still available */ u32 head; /* offset to write at */ struct gve_queue_page_list *qpl; /* QPL mapped into this FIFO */ }; /* TX descriptor for DQO format */ union gve_tx_desc_dqo { struct gve_tx_pkt_desc_dqo pkt; struct gve_tx_tso_context_desc_dqo tso_ctx; struct gve_tx_general_context_desc_dqo general_ctx; }; enum gve_packet_state { /* Packet is in free list, available to be allocated. * This should always be zero since state is not explicitly initialized. */ GVE_PACKET_STATE_UNALLOCATED, /* Packet is expecting a regular data completion or miss completion */ GVE_PACKET_STATE_PENDING_DATA_COMPL, /* Packet has received a miss completion and is expecting a * re-injection completion. */ GVE_PACKET_STATE_PENDING_REINJECT_COMPL, /* No valid completion received within the specified timeout. */ GVE_PACKET_STATE_TIMED_OUT_COMPL, }; struct gve_tx_pending_packet_dqo { struct sk_buff *skb; /* skb for this packet */ /* 0th element corresponds to the linear portion of `skb`, should be * unmapped with `dma_unmap_single`. * * All others correspond to `skb`'s frags and should be unmapped with * `dma_unmap_page`. */ DEFINE_DMA_UNMAP_ADDR(dma[MAX_SKB_FRAGS + 1]); DEFINE_DMA_UNMAP_LEN(len[MAX_SKB_FRAGS + 1]); u16 num_bufs; /* Linked list index to next element in the list, or -1 if none */ s16 next; /* Linked list index to prev element in the list, or -1 if none. * Used for tracking either outstanding miss completions or prematurely * freed packets. */ s16 prev; /* Identifies the current state of the packet as defined in * `enum gve_packet_state`. */ u8 state; /* If packet is an outstanding miss completion, then the packet is * freed if the corresponding re-injection completion is not received * before kernel jiffies exceeds timeout_jiffies. */ unsigned long timeout_jiffies; }; /* Contains datapath state used to represent a TX queue. */ struct gve_tx_ring { /* Cacheline 0 -- Accessed & dirtied during transmit */ union { /* GQI fields */ struct { struct gve_tx_fifo tx_fifo; u32 req; /* driver tracked head pointer */ u32 done; /* driver tracked tail pointer */ }; /* DQO fields. */ struct { /* Linked list of gve_tx_pending_packet_dqo. Index into * pending_packets, or -1 if empty. * * This is a consumer list owned by the TX path. When it * runs out, the producer list is stolen from the * completion handling path * (dqo_compl.free_pending_packets). */ s16 free_pending_packets; /* Cached value of `dqo_compl.hw_tx_head` */ u32 head; u32 tail; /* Last posted buffer index + 1 */ /* Index of the last descriptor with "report event" bit * set. */ u32 last_re_idx; } dqo_tx; }; /* Cacheline 1 -- Accessed & dirtied during gve_clean_tx_done */ union { /* GQI fields */ struct { /* Spinlock for when cleanup in progress */ spinlock_t clean_lock; }; /* DQO fields. */ struct { u32 head; /* Last read on compl_desc */ /* Tracks the current gen bit of compl_q */ u8 cur_gen_bit; /* Linked list of gve_tx_pending_packet_dqo. Index into * pending_packets, or -1 if empty. * * This is the producer list, owned by the completion * handling path. When the consumer list * (dqo_tx.free_pending_packets) is runs out, this list * will be stolen. */ atomic_t free_pending_packets; /* Last TX ring index fetched by HW */ atomic_t hw_tx_head; /* List to track pending packets which received a miss * completion but not a corresponding reinjection. */ struct gve_index_list miss_completions; /* List to track pending packets that were completed * before receiving a valid completion because they * reached a specified timeout. */ struct gve_index_list timed_out_completions; } dqo_compl; } ____cacheline_aligned; u64 pkt_done; /* free-running - total packets completed */ u64 bytes_done; /* free-running - total bytes completed */ u64 dropped_pkt; /* free-running - total packets dropped */ u64 dma_mapping_error; /* count of dma mapping errors */ /* Cacheline 2 -- Read-mostly fields */ union { /* GQI fields */ struct { union gve_tx_desc *desc; /* Maps 1:1 to a desc */ struct gve_tx_buffer_state *info; }; /* DQO fields. */ struct { union gve_tx_desc_dqo *tx_ring; struct gve_tx_compl_desc *compl_ring; struct gve_tx_pending_packet_dqo *pending_packets; s16 num_pending_packets; u32 complq_mask; /* complq size is complq_mask + 1 */ } dqo; } ____cacheline_aligned; struct netdev_queue *netdev_txq; struct gve_queue_resources *q_resources; /* head and tail pointer idx */ struct device *dev; u32 mask; /* masks req and done down to queue size */ u8 raw_addressing; /* use raw_addressing? */ /* Slow-path fields */ u32 q_num ____cacheline_aligned; /* queue idx */ u32 stop_queue; /* count of queue stops */ u32 wake_queue; /* count of queue wakes */ u32 queue_timeout; /* count of queue timeouts */ u32 ntfy_id; /* notification block index */ u32 last_kick_msec; /* Last time the queue was kicked */ dma_addr_t bus; /* dma address of the descr ring */ dma_addr_t q_resources_bus; /* dma address of the queue resources */ dma_addr_t complq_bus_dqo; /* dma address of the dqo.compl_ring */ struct u64_stats_sync statss; /* sync stats for 32bit archs */ } ____cacheline_aligned; /* Wraps the info for one irq including the napi struct and the queues * associated with that irq. */ struct gve_notify_block { __be32 *irq_db_index; /* pointer to idx into Bar2 */ char name[IFNAMSIZ + 16]; /* name registered with the kernel */ struct napi_struct napi; /* kernel napi struct for this block */ struct gve_priv *priv; struct gve_tx_ring *tx; /* tx rings on this block */ struct gve_rx_ring *rx; /* rx rings on this block */ }; /* Tracks allowed and current queue settings */ struct gve_queue_config { u16 max_queues; u16 num_queues; /* current */ }; /* Tracks the available and used qpl IDs */ struct gve_qpl_config { u32 qpl_map_size; /* map memory size */ unsigned long *qpl_id_map; /* bitmap of used qpl ids */ }; struct gve_options_dqo_rda { u16 tx_comp_ring_entries; /* number of tx_comp descriptors */ u16 rx_buff_ring_entries; /* number of rx_buff descriptors */ }; struct gve_irq_db { __be32 index; } ____cacheline_aligned; struct gve_ptype { u8 l3_type; /* `gve_l3_type` in gve_adminq.h */ u8 l4_type; /* `gve_l4_type` in gve_adminq.h */ }; struct gve_ptype_lut { struct gve_ptype ptypes[GVE_NUM_PTYPES]; }; /* GVE_QUEUE_FORMAT_UNSPECIFIED must be zero since 0 is the default value * when the entire configure_device_resources command is zeroed out and the * queue_format is not specified. */ enum gve_queue_format { GVE_QUEUE_FORMAT_UNSPECIFIED = 0x0, GVE_GQI_RDA_FORMAT = 0x1, GVE_GQI_QPL_FORMAT = 0x2, GVE_DQO_RDA_FORMAT = 0x3, }; struct gve_priv { struct net_device *dev; struct gve_tx_ring *tx; /* array of tx_cfg.num_queues */ struct gve_rx_ring *rx; /* array of rx_cfg.num_queues */ struct gve_queue_page_list *qpls; /* array of num qpls */ struct gve_notify_block *ntfy_blocks; /* array of num_ntfy_blks */ struct gve_irq_db *irq_db_indices; /* array of num_ntfy_blks */ dma_addr_t irq_db_indices_bus; struct msix_entry *msix_vectors; /* array of num_ntfy_blks + 1 */ char mgmt_msix_name[IFNAMSIZ + 16]; u32 mgmt_msix_idx; __be32 *counter_array; /* array of num_event_counters */ dma_addr_t counter_array_bus; u16 num_event_counters; u16 tx_desc_cnt; /* num desc per ring */ u16 rx_desc_cnt; /* num desc per ring */ u16 tx_pages_per_qpl; /* tx buffer length */ u16 rx_data_slot_cnt; /* rx buffer length */ u64 max_registered_pages; u64 num_registered_pages; /* num pages registered with NIC */ u32 rx_copybreak; /* copy packets smaller than this */ u16 default_num_queues; /* default num queues to set up */ struct gve_queue_config tx_cfg; struct gve_queue_config rx_cfg; struct gve_qpl_config qpl_cfg; /* map used QPL ids */ u32 num_ntfy_blks; /* spilt between TX and RX so must be even */ struct gve_registers __iomem *reg_bar0; /* see gve_register.h */ __be32 __iomem *db_bar2; /* "array" of doorbells */ u32 msg_enable; /* level for netif* netdev print macros */ struct pci_dev *pdev; /* metrics */ u32 tx_timeo_cnt; /* Admin queue - see gve_adminq.h*/ union gve_adminq_command *adminq; dma_addr_t adminq_bus_addr; u32 adminq_mask; /* masks prod_cnt to adminq size */ u32 adminq_prod_cnt; /* free-running count of AQ cmds executed */ u32 adminq_cmd_fail; /* free-running count of AQ cmds failed */ u32 adminq_timeouts; /* free-running count of AQ cmds timeouts */ /* free-running count of per AQ cmd executed */ u32 adminq_describe_device_cnt; u32 adminq_cfg_device_resources_cnt; u32 adminq_register_page_list_cnt; u32 adminq_unregister_page_list_cnt; u32 adminq_create_tx_queue_cnt; u32 adminq_create_rx_queue_cnt; u32 adminq_destroy_tx_queue_cnt; u32 adminq_destroy_rx_queue_cnt; u32 adminq_dcfg_device_resources_cnt; u32 adminq_set_driver_parameter_cnt; u32 adminq_report_stats_cnt; u32 adminq_report_link_speed_cnt; u32 adminq_get_ptype_map_cnt; u32 adminq_verify_driver_compatibility_cnt; /* Global stats */ u32 interface_up_cnt; /* count of times interface turned up since last reset */ u32 interface_down_cnt; /* count of times interface turned down since last reset */ u32 reset_cnt; /* count of reset */ u32 page_alloc_fail; /* count of page alloc fails */ u32 dma_mapping_error; /* count of dma mapping errors */ u32 stats_report_trigger_cnt; /* count of device-requested stats-reports since last reset */ u32 suspend_cnt; /* count of times suspended */ u32 resume_cnt; /* count of times resumed */ struct workqueue_struct *gve_wq; struct work_struct service_task; struct work_struct stats_report_task; unsigned long service_task_flags; unsigned long state_flags; struct gve_stats_report *stats_report; u64 stats_report_len; dma_addr_t stats_report_bus; /* dma address for the stats report */ unsigned long ethtool_flags; unsigned long stats_report_timer_period; struct timer_list stats_report_timer; /* Gvnic device link speed from hypervisor. */ u64 link_speed; bool up_before_suspend; /* True if dev was up before suspend */ struct gve_options_dqo_rda options_dqo_rda; struct gve_ptype_lut *ptype_lut_dqo; /* Must be a power of two. */ int data_buffer_size_dqo; enum gve_queue_format queue_format; /* Interrupt coalescing settings */ u32 tx_coalesce_usecs; u32 rx_coalesce_usecs; }; enum gve_service_task_flags_bit { GVE_PRIV_FLAGS_DO_RESET = 1, GVE_PRIV_FLAGS_RESET_IN_PROGRESS = 2, GVE_PRIV_FLAGS_PROBE_IN_PROGRESS = 3, GVE_PRIV_FLAGS_DO_REPORT_STATS = 4, }; enum gve_state_flags_bit { GVE_PRIV_FLAGS_ADMIN_QUEUE_OK = 1, GVE_PRIV_FLAGS_DEVICE_RESOURCES_OK = 2, GVE_PRIV_FLAGS_DEVICE_RINGS_OK = 3, GVE_PRIV_FLAGS_NAPI_ENABLED = 4, }; enum gve_ethtool_flags_bit { GVE_PRIV_FLAGS_REPORT_STATS = 0, }; static inline bool gve_get_do_reset(struct gve_priv *priv) { return test_bit(GVE_PRIV_FLAGS_DO_RESET, &priv->service_task_flags); } static inline void gve_set_do_reset(struct gve_priv *priv) { set_bit(GVE_PRIV_FLAGS_DO_RESET, &priv->service_task_flags); } static inline void gve_clear_do_reset(struct gve_priv *priv) { clear_bit(GVE_PRIV_FLAGS_DO_RESET, &priv->service_task_flags); } static inline bool gve_get_reset_in_progress(struct gve_priv *priv) { return test_bit(GVE_PRIV_FLAGS_RESET_IN_PROGRESS, &priv->service_task_flags); } static inline void gve_set_reset_in_progress(struct gve_priv *priv) { set_bit(GVE_PRIV_FLAGS_RESET_IN_PROGRESS, &priv->service_task_flags); } static inline void gve_clear_reset_in_progress(struct gve_priv *priv) { clear_bit(GVE_PRIV_FLAGS_RESET_IN_PROGRESS, &priv->service_task_flags); } static inline bool gve_get_probe_in_progress(struct gve_priv *priv) { return test_bit(GVE_PRIV_FLAGS_PROBE_IN_PROGRESS, &priv->service_task_flags); } static inline void gve_set_probe_in_progress(struct gve_priv *priv) { set_bit(GVE_PRIV_FLAGS_PROBE_IN_PROGRESS, &priv->service_task_flags); } static inline void gve_clear_probe_in_progress(struct gve_priv *priv) { clear_bit(GVE_PRIV_FLAGS_PROBE_IN_PROGRESS, &priv->service_task_flags); } static inline bool gve_get_do_report_stats(struct gve_priv *priv) { return test_bit(GVE_PRIV_FLAGS_DO_REPORT_STATS, &priv->service_task_flags); } static inline void gve_set_do_report_stats(struct gve_priv *priv) { set_bit(GVE_PRIV_FLAGS_DO_REPORT_STATS, &priv->service_task_flags); } static inline void gve_clear_do_report_stats(struct gve_priv *priv) { clear_bit(GVE_PRIV_FLAGS_DO_REPORT_STATS, &priv->service_task_flags); } static inline bool gve_get_admin_queue_ok(struct gve_priv *priv) { return test_bit(GVE_PRIV_FLAGS_ADMIN_QUEUE_OK, &priv->state_flags); } static inline void gve_set_admin_queue_ok(struct gve_priv *priv) { set_bit(GVE_PRIV_FLAGS_ADMIN_QUEUE_OK, &priv->state_flags); } static inline void gve_clear_admin_queue_ok(struct gve_priv *priv) { clear_bit(GVE_PRIV_FLAGS_ADMIN_QUEUE_OK, &priv->state_flags); } static inline bool gve_get_device_resources_ok(struct gve_priv *priv) { return test_bit(GVE_PRIV_FLAGS_DEVICE_RESOURCES_OK, &priv->state_flags); } static inline void gve_set_device_resources_ok(struct gve_priv *priv) { set_bit(GVE_PRIV_FLAGS_DEVICE_RESOURCES_OK, &priv->state_flags); } static inline void gve_clear_device_resources_ok(struct gve_priv *priv) { clear_bit(GVE_PRIV_FLAGS_DEVICE_RESOURCES_OK, &priv->state_flags); } static inline bool gve_get_device_rings_ok(struct gve_priv *priv) { return test_bit(GVE_PRIV_FLAGS_DEVICE_RINGS_OK, &priv->state_flags); } static inline void gve_set_device_rings_ok(struct gve_priv *priv) { set_bit(GVE_PRIV_FLAGS_DEVICE_RINGS_OK, &priv->state_flags); } static inline void gve_clear_device_rings_ok(struct gve_priv *priv) { clear_bit(GVE_PRIV_FLAGS_DEVICE_RINGS_OK, &priv->state_flags); } static inline bool gve_get_napi_enabled(struct gve_priv *priv) { return test_bit(GVE_PRIV_FLAGS_NAPI_ENABLED, &priv->state_flags); } static inline void gve_set_napi_enabled(struct gve_priv *priv) { set_bit(GVE_PRIV_FLAGS_NAPI_ENABLED, &priv->state_flags); } static inline void gve_clear_napi_enabled(struct gve_priv *priv) { clear_bit(GVE_PRIV_FLAGS_NAPI_ENABLED, &priv->state_flags); } static inline bool gve_get_report_stats(struct gve_priv *priv) { return test_bit(GVE_PRIV_FLAGS_REPORT_STATS, &priv->ethtool_flags); } static inline void gve_clear_report_stats(struct gve_priv *priv) { clear_bit(GVE_PRIV_FLAGS_REPORT_STATS, &priv->ethtool_flags); } /* Returns the address of the ntfy_blocks irq doorbell */ static inline __be32 __iomem *gve_irq_doorbell(struct gve_priv *priv, struct gve_notify_block *block) { return &priv->db_bar2[be32_to_cpu(*block->irq_db_index)]; } /* Returns the index into ntfy_blocks of the given tx ring's block */ static inline u32 gve_tx_idx_to_ntfy(struct gve_priv *priv, u32 queue_idx) { return queue_idx; } /* Returns the index into ntfy_blocks of the given rx ring's block */ static inline u32 gve_rx_idx_to_ntfy(struct gve_priv *priv, u32 queue_idx) { return (priv->num_ntfy_blks / 2) + queue_idx; } /* Returns the number of tx queue page lists */ static inline u32 gve_num_tx_qpls(struct gve_priv *priv) { if (priv->queue_format != GVE_GQI_QPL_FORMAT) return 0; return priv->tx_cfg.num_queues; } /* Returns the number of rx queue page lists */ static inline u32 gve_num_rx_qpls(struct gve_priv *priv) { if (priv->queue_format != GVE_GQI_QPL_FORMAT) return 0; return priv->rx_cfg.num_queues; } /* Returns a pointer to the next available tx qpl in the list of qpls */ static inline struct gve_queue_page_list *gve_assign_tx_qpl(struct gve_priv *priv) { int id = find_first_zero_bit(priv->qpl_cfg.qpl_id_map, priv->qpl_cfg.qpl_map_size); /* we are out of tx qpls */ if (id >= gve_num_tx_qpls(priv)) return NULL; set_bit(id, priv->qpl_cfg.qpl_id_map); return &priv->qpls[id]; } /* Returns a pointer to the next available rx qpl in the list of qpls */ static inline struct gve_queue_page_list *gve_assign_rx_qpl(struct gve_priv *priv) { int id = find_next_zero_bit(priv->qpl_cfg.qpl_id_map, priv->qpl_cfg.qpl_map_size, gve_num_tx_qpls(priv)); /* we are out of rx qpls */ if (id == gve_num_tx_qpls(priv) + gve_num_rx_qpls(priv)) return NULL; set_bit(id, priv->qpl_cfg.qpl_id_map); return &priv->qpls[id]; } /* Unassigns the qpl with the given id */ static inline void gve_unassign_qpl(struct gve_priv *priv, int id) { clear_bit(id, priv->qpl_cfg.qpl_id_map); } /* Returns the correct dma direction for tx and rx qpls */ static inline enum dma_data_direction gve_qpl_dma_dir(struct gve_priv *priv, int id) { if (id < gve_num_tx_qpls(priv)) return DMA_TO_DEVICE; else return DMA_FROM_DEVICE; } static inline bool gve_is_gqi(struct gve_priv *priv) { return priv->queue_format == GVE_GQI_RDA_FORMAT || priv->queue_format == GVE_GQI_QPL_FORMAT; } /* buffers */ int gve_alloc_page(struct gve_priv *priv, struct device *dev, struct page **page, dma_addr_t *dma, enum dma_data_direction, gfp_t gfp_flags); void gve_free_page(struct device *dev, struct page *page, dma_addr_t dma, enum dma_data_direction); /* tx handling */ netdev_tx_t gve_tx(struct sk_buff *skb, struct net_device *dev); bool gve_tx_poll(struct gve_notify_block *block, int budget); int gve_tx_alloc_rings(struct gve_priv *priv); void gve_tx_free_rings_gqi(struct gve_priv *priv); u32 gve_tx_load_event_counter(struct gve_priv *priv, struct gve_tx_ring *tx); bool gve_tx_clean_pending(struct gve_priv *priv, struct gve_tx_ring *tx); /* rx handling */ void gve_rx_write_doorbell(struct gve_priv *priv, struct gve_rx_ring *rx); int gve_rx_poll(struct gve_notify_block *block, int budget); bool gve_rx_work_pending(struct gve_rx_ring *rx); int gve_rx_alloc_rings(struct gve_priv *priv); void gve_rx_free_rings_gqi(struct gve_priv *priv); /* Reset */ void gve_schedule_reset(struct gve_priv *priv); int gve_reset(struct gve_priv *priv, bool attempt_teardown); int gve_adjust_queues(struct gve_priv *priv, struct gve_queue_config new_rx_config, struct gve_queue_config new_tx_config); /* report stats handling */ void gve_handle_report_stats(struct gve_priv *priv); /* exported by ethtool.c */ extern const struct ethtool_ops gve_ethtool_ops; /* needed by ethtool */ extern const char gve_version_str[]; #endif /* _GVE_H_ */
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