diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h index 8f8a92ce5070f..e918369ba24e2 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -48,6 +48,10 @@ /* PTYPEs are always 10 bits. */ #define GVE_NUM_PTYPES 1024 +/* Default minimum ring size */ +#define GVE_DEFAULT_MIN_TX_RING_SIZE 256 +#define GVE_DEFAULT_MIN_RX_RING_SIZE 512 + #define GVE_DEFAULT_RX_BUFFER_SIZE 2048 #define GVE_DEFAULT_RX_BUFFER_OFFSET 2048 @@ -56,9 +60,6 @@ #define GVE_GQ_TX_MIN_PKT_DESC_BYTES 182 -#define DQO_QPL_DEFAULT_TX_PAGES 512 -#define DQO_QPL_DEFAULT_RX_PAGES 2048 - /* Maximum TSO size supported on DQO */ #define GVE_DQO_TX_MAX 0x3FFFF @@ -603,11 +604,6 @@ struct gve_qpl_config { 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; @@ -621,6 +617,57 @@ struct gve_ptype_lut { struct gve_ptype ptypes[GVE_NUM_PTYPES]; }; +/* Parameters for allocating queue page lists */ +struct gve_qpls_alloc_cfg { + struct gve_qpl_config *qpl_cfg; + struct gve_queue_config *tx_cfg; + struct gve_queue_config *rx_cfg; + + u16 num_xdp_queues; + bool raw_addressing; + bool is_gqi; + + /* Allocated resources are returned here */ + struct gve_queue_page_list *qpls; +}; + +/* Parameters for allocating resources for tx queues */ +struct gve_tx_alloc_rings_cfg { + struct gve_queue_config *qcfg; + + /* qpls and qpl_cfg must already be allocated */ + struct gve_queue_page_list *qpls; + struct gve_qpl_config *qpl_cfg; + + u16 ring_size; + u16 start_idx; + u16 num_rings; + u16 pages_per_qpl; + bool raw_addressing; + + /* Allocated resources are returned here */ + struct gve_tx_ring *tx; +}; + +/* Parameters for allocating resources for rx queues */ +struct gve_rx_alloc_rings_cfg { + /* tx config is also needed to determine QPL ids */ + struct gve_queue_config *qcfg; + struct gve_queue_config *qcfg_tx; + + /* qpls and qpl_cfg must already be allocated */ + struct gve_queue_page_list *qpls; + struct gve_qpl_config *qpl_cfg; + + u16 ring_size; + u16 pages_per_qpl; + bool raw_addressing; + bool enable_header_split; + + /* Allocated resources are returned here */ + struct gve_rx_ring *rx; +}; + /* 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. @@ -650,9 +697,14 @@ struct gve_priv { u16 num_event_counters; u16 tx_desc_cnt; /* num desc per ring */ u16 rx_desc_cnt; /* num desc per ring */ + u16 max_tx_desc_cnt; + u16 max_rx_desc_cnt; + u16 min_tx_desc_cnt; + u16 min_rx_desc_cnt; + bool modify_ring_size_enabled; + bool default_min_ring_size; u16 tx_pages_per_qpl; /* Suggested number of pages per qpl for TX queues by NIC */ - u16 rx_pages_per_qpl; /* Suggested number of pages per qpl for RX queues by NIC */ - u16 rx_data_slot_cnt; /* rx buffer length */ + u16 rx_pages_per_qpl; /* Number of pages per qpl for RX queues */ u64 max_registered_pages; u64 num_registered_pages; /* num pages registered with NIC */ struct bpf_prog *xdp_prog; /* XDP BPF program */ @@ -724,7 +776,6 @@ struct gve_priv { 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. */ @@ -916,14 +967,14 @@ static inline bool gve_is_qpl(struct gve_priv *priv) priv->queue_format == GVE_DQO_QPL_FORMAT; } -/* Returns the number of tx queue page lists - */ -static inline u32 gve_num_tx_qpls(struct gve_priv *priv) +/* Returns the number of tx queue page lists */ +static inline u32 gve_num_tx_qpls(const struct gve_queue_config *tx_cfg, + int num_xdp_queues, + bool is_qpl) { - if (!gve_is_qpl(priv)) + if (!is_qpl) return 0; - - return priv->tx_cfg.num_queues + priv->num_xdp_queues; + return tx_cfg->num_queues + num_xdp_queues; } /* Returns the number of XDP tx queue page lists @@ -936,14 +987,13 @@ static inline u32 gve_num_xdp_qpls(struct gve_priv *priv) return priv->num_xdp_queues; } -/* Returns the number of rx queue page lists - */ -static inline u32 gve_num_rx_qpls(struct gve_priv *priv) +/* Returns the number of rx queue page lists */ +static inline u32 gve_num_rx_qpls(const struct gve_queue_config *rx_cfg, + bool is_qpl) { - if (!gve_is_qpl(priv)) + if (!is_qpl) return 0; - - return priv->rx_cfg.num_queues; + return rx_cfg->num_queues; } static inline u32 gve_tx_qpl_id(struct gve_priv *priv, int tx_qid) @@ -956,59 +1006,59 @@ static inline u32 gve_rx_qpl_id(struct gve_priv *priv, int rx_qid) return priv->tx_cfg.max_queues + rx_qid; } +/* Returns the index into priv->qpls where a certain rx queue's QPL resides */ +static inline u32 gve_get_rx_qpl_id(const struct gve_queue_config *tx_cfg, int rx_qid) +{ + return tx_cfg->max_queues + rx_qid; +} + static inline u32 gve_tx_start_qpl_id(struct gve_priv *priv) { return gve_tx_qpl_id(priv, 0); } -static inline u32 gve_rx_start_qpl_id(struct gve_priv *priv) +/* Returns the index into priv->qpls where the first rx queue's QPL resides */ +static inline u32 gve_rx_start_qpl_id(const struct gve_queue_config *tx_cfg) { - return gve_rx_qpl_id(priv, 0); + return gve_get_rx_qpl_id(tx_cfg, 0); } -/* Returns a pointer to the next available tx qpl in the list of qpls - */ +/* 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 tx_qid) +struct gve_queue_page_list *gve_assign_tx_qpl(struct gve_tx_alloc_rings_cfg *cfg, + int tx_qid) { - int id = gve_tx_qpl_id(priv, tx_qid); - /* QPL already in use */ - if (test_bit(id, priv->qpl_cfg.qpl_id_map)) + if (test_bit(tx_qid, cfg->qpl_cfg->qpl_id_map)) return NULL; - - set_bit(id, priv->qpl_cfg.qpl_id_map); - return &priv->qpls[id]; + set_bit(tx_qid, cfg->qpl_cfg->qpl_id_map); + return &cfg->qpls[tx_qid]; } -/* Returns a pointer to the next available rx qpl in the list of qpls - */ +/* 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 rx_qid) +struct gve_queue_page_list *gve_assign_rx_qpl(struct gve_rx_alloc_rings_cfg *cfg, + int rx_qid) { - int id = gve_rx_qpl_id(priv, rx_qid); - + int id = gve_get_rx_qpl_id(cfg->qcfg_tx, rx_qid); /* QPL already in use */ - if (test_bit(id, priv->qpl_cfg.qpl_id_map)) + if (test_bit(id, cfg->qpl_cfg->qpl_id_map)) return NULL; - - set_bit(id, priv->qpl_cfg.qpl_id_map); - return &priv->qpls[id]; + set_bit(id, cfg->qpl_cfg->qpl_id_map); + return &cfg->qpls[id]; } -/* Unassigns the qpl with the given id - */ -static inline void gve_unassign_qpl(struct gve_priv *priv, int id) +/* Unassigns the qpl with the given id */ +static inline void gve_unassign_qpl(struct gve_qpl_config *qpl_cfg, int id) { - clear_bit(id, priv->qpl_cfg.qpl_id_map); + clear_bit(id, qpl_cfg->qpl_id_map); } -/* Returns the correct dma direction for tx and rx qpls - */ +/* 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_rx_start_qpl_id(priv)) + if (id < gve_rx_start_qpl_id(&priv->tx_cfg)) return DMA_TO_DEVICE; else return DMA_FROM_DEVICE; @@ -1051,8 +1101,12 @@ void gve_xdp_tx_flush(struct gve_priv *priv, u32 xdp_qid); bool gve_tx_poll(struct gve_notify_block *block, int budget); bool gve_xdp_poll(struct gve_notify_block *block, int budget); int gve_xsk_tx_poll(struct gve_notify_block *block, int budget); -int gve_tx_alloc_rings(struct gve_priv *priv, int start_id, int num_rings); -void gve_tx_free_rings_gqi(struct gve_priv *priv, int start_id, int num_rings); +int gve_tx_alloc_rings_gqi(struct gve_priv *priv, + struct gve_tx_alloc_rings_cfg *cfg); +void gve_tx_free_rings_gqi(struct gve_priv *priv, + struct gve_tx_alloc_rings_cfg *cfg); +void gve_tx_start_ring_gqi(struct gve_priv *priv, int idx); +void gve_tx_stop_ring_gqi(struct gve_priv *priv, int idx); 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); @@ -1060,11 +1114,29 @@ bool gve_tx_clean_pending(struct gve_priv *priv, struct gve_tx_ring *tx); 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); +int gve_rx_alloc_rings_gqi(struct gve_priv *priv, + struct gve_rx_alloc_rings_cfg *cfg); +void gve_rx_free_rings_gqi(struct gve_priv *priv, + struct gve_rx_alloc_rings_cfg *cfg); +void gve_rx_start_ring_gqi(struct gve_priv *priv, int idx); +void gve_rx_stop_ring_gqi(struct gve_priv *priv, int idx); +/* napi handling */ +int gve_napi_poll(struct napi_struct *napi, int budget); +int gve_napi_poll_dqo(struct napi_struct *napi, int budget); +void gve_add_napi(struct gve_priv *priv, int ntfy_idx, + int (*gve_poll)(struct napi_struct *, int)); +void gve_remove_napi(struct gve_priv *priv, int ntfy_idx); /* Reset */ void gve_schedule_reset(struct gve_priv *priv); int gve_reset(struct gve_priv *priv, bool attempt_teardown); +void gve_get_curr_alloc_cfgs(struct gve_priv *priv, + struct gve_qpls_alloc_cfg *qpls_alloc_cfg, + struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, + struct gve_rx_alloc_rings_cfg *rx_alloc_cfg); +int gve_adjust_config(struct gve_priv *priv, + struct gve_qpls_alloc_cfg *qpls_alloc_cfg, + struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, + struct gve_rx_alloc_rings_cfg *rx_alloc_cfg); int gve_adjust_queues(struct gve_priv *priv, struct gve_queue_config new_rx_config, struct gve_queue_config new_tx_config); diff --git a/drivers/net/ethernet/google/gve/gve_adminq.c b/drivers/net/ethernet/google/gve/gve_adminq.c index 12fbd723ecc6e..59a8127a6f120 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.c +++ b/drivers/net/ethernet/google/gve/gve_adminq.c @@ -32,6 +32,8 @@ struct gve_device_option *gve_get_next_option(struct gve_device_descriptor *desc return option_end > descriptor_end ? NULL : (struct gve_device_option *)option_end; } +#define GVE_DEVICE_OPTION_NO_MIN_RING_SIZE 8 + static void gve_parse_device_option(struct gve_priv *priv, struct gve_device_descriptor *device_descriptor, @@ -40,7 +42,9 @@ void gve_parse_device_option(struct gve_priv *priv, struct gve_device_option_gqi_qpl **dev_op_gqi_qpl, struct gve_device_option_dqo_rda **dev_op_dqo_rda, struct gve_device_option_jumbo_frames **dev_op_jumbo_frames, - struct gve_device_option_dqo_qpl **dev_op_dqo_qpl) + struct gve_device_option_dqo_qpl **dev_op_dqo_qpl, + struct gve_device_option_buffer_sizes **dev_op_buffer_sizes, + struct gve_device_option_modify_ring **dev_op_modify_ring) { u32 req_feat_mask = be32_to_cpu(option->required_features_mask); u16 option_length = be16_to_cpu(option->option_length); @@ -147,6 +151,27 @@ void gve_parse_device_option(struct gve_priv *priv, } *dev_op_jumbo_frames = (void *)(option + 1); break; + case GVE_DEV_OPT_ID_MODIFY_RING: + if (option_length < GVE_DEVICE_OPTION_NO_MIN_RING_SIZE || + req_feat_mask != GVE_DEV_OPT_REQ_FEAT_MASK_MODIFY_RING) { + dev_warn(&priv->pdev->dev, GVE_DEVICE_OPTION_ERROR_FMT, + "Modify Ring", (int)sizeof(**dev_op_modify_ring), + GVE_DEV_OPT_REQ_FEAT_MASK_MODIFY_RING, + option_length, req_feat_mask); + break; + } + + if (option_length > sizeof(**dev_op_modify_ring)) { + dev_warn(&priv->pdev->dev, + GVE_DEVICE_OPTION_TOO_BIG_FMT, "Modify Ring"); + } + + *dev_op_modify_ring = (void *)(option + 1); + + /* device has not provided min ring size */ + if (option_length == GVE_DEVICE_OPTION_NO_MIN_RING_SIZE) + priv->default_min_ring_size = true; + break; default: /* If we don't recognize the option just continue * without doing anything. @@ -164,7 +189,9 @@ gve_process_device_options(struct gve_priv *priv, struct gve_device_option_gqi_qpl **dev_op_gqi_qpl, struct gve_device_option_dqo_rda **dev_op_dqo_rda, struct gve_device_option_jumbo_frames **dev_op_jumbo_frames, - struct gve_device_option_dqo_qpl **dev_op_dqo_qpl) + struct gve_device_option_dqo_qpl **dev_op_dqo_qpl, + struct gve_device_option_buffer_sizes **dev_op_buffer_sizes, + struct gve_device_option_modify_ring **dev_op_modify_ring) { const int num_options = be16_to_cpu(descriptor->num_device_options); struct gve_device_option *dev_opt; @@ -185,7 +212,8 @@ gve_process_device_options(struct gve_priv *priv, gve_parse_device_option(priv, descriptor, dev_opt, dev_op_gqi_rda, dev_op_gqi_qpl, dev_op_dqo_rda, dev_op_jumbo_frames, - dev_op_dqo_qpl); + dev_op_dqo_qpl, dev_op_buffer_sizes, + dev_op_modify_ring); dev_opt = next_opt; } @@ -546,6 +574,7 @@ static int gve_adminq_create_tx_queue(struct gve_priv *priv, u32 queue_index) cpu_to_be64(tx->q_resources_bus), .tx_ring_addr = cpu_to_be64(tx->bus), .ntfy_id = cpu_to_be32(tx->ntfy_id), + .tx_ring_size = cpu_to_be16(priv->tx_desc_cnt), }; if (gve_is_gqi(priv)) { @@ -554,24 +583,17 @@ static int gve_adminq_create_tx_queue(struct gve_priv *priv, u32 queue_index) cmd.create_tx_queue.queue_page_list_id = cpu_to_be32(qpl_id); } else { - u16 comp_ring_size; u32 qpl_id = 0; - if (priv->queue_format == GVE_DQO_RDA_FORMAT) { + if (priv->queue_format == GVE_DQO_RDA_FORMAT) qpl_id = GVE_RAW_ADDRESSING_QPL_ID; - comp_ring_size = - priv->options_dqo_rda.tx_comp_ring_entries; - } else { + else qpl_id = tx->dqo.qpl->id; - comp_ring_size = priv->tx_desc_cnt; - } cmd.create_tx_queue.queue_page_list_id = cpu_to_be32(qpl_id); - cmd.create_tx_queue.tx_ring_size = - cpu_to_be16(priv->tx_desc_cnt); cmd.create_tx_queue.tx_comp_ring_addr = cpu_to_be64(tx->complq_bus_dqo); cmd.create_tx_queue.tx_comp_ring_size = - cpu_to_be16(comp_ring_size); + cpu_to_be16(priv->tx_desc_cnt); } return gve_adminq_issue_cmd(priv, &cmd); @@ -602,6 +624,7 @@ static int gve_adminq_create_rx_queue(struct gve_priv *priv, u32 queue_index) .queue_id = cpu_to_be32(queue_index), .ntfy_id = cpu_to_be32(rx->ntfy_id), .queue_resources_addr = cpu_to_be64(rx->q_resources_bus), + .rx_ring_size = cpu_to_be16(priv->rx_desc_cnt), }; if (gve_is_gqi(priv)) { @@ -616,20 +639,13 @@ static int gve_adminq_create_rx_queue(struct gve_priv *priv, u32 queue_index) cmd.create_rx_queue.queue_page_list_id = cpu_to_be32(qpl_id); cmd.create_rx_queue.packet_buffer_size = cpu_to_be16(rx->packet_buffer_size); } else { - u16 rx_buff_ring_entries; u32 qpl_id = 0; - if (priv->queue_format == GVE_DQO_RDA_FORMAT) { + if (priv->queue_format == GVE_DQO_RDA_FORMAT) qpl_id = GVE_RAW_ADDRESSING_QPL_ID; - rx_buff_ring_entries = - priv->options_dqo_rda.rx_buff_ring_entries; - } else { + else qpl_id = rx->dqo.qpl->id; - rx_buff_ring_entries = priv->rx_desc_cnt; - } cmd.create_rx_queue.queue_page_list_id = cpu_to_be32(qpl_id); - cmd.create_rx_queue.rx_ring_size = - cpu_to_be16(priv->rx_desc_cnt); cmd.create_rx_queue.rx_desc_ring_addr = cpu_to_be64(rx->dqo.complq.bus); cmd.create_rx_queue.rx_data_ring_addr = @@ -637,7 +653,7 @@ static int gve_adminq_create_rx_queue(struct gve_priv *priv, u32 queue_index) cmd.create_rx_queue.packet_buffer_size = cpu_to_be16(priv->data_buffer_size_dqo); cmd.create_rx_queue.rx_buff_ring_size = - cpu_to_be16(rx_buff_ring_entries); + cpu_to_be16(priv->rx_desc_cnt); cmd.create_rx_queue.enable_rsc = !!(priv->dev->features & NETIF_F_LRO); } @@ -723,31 +739,17 @@ int gve_adminq_destroy_rx_queues(struct gve_priv *priv, u32 num_queues) return gve_adminq_kick_and_wait(priv); } -static int gve_set_desc_cnt(struct gve_priv *priv, - struct gve_device_descriptor *descriptor) +static void gve_set_default_desc_cnt(struct gve_priv *priv, + const struct gve_device_descriptor *descriptor) { priv->tx_desc_cnt = be16_to_cpu(descriptor->tx_queue_entries); priv->rx_desc_cnt = be16_to_cpu(descriptor->rx_queue_entries); - return 0; -} -static int -gve_set_desc_cnt_dqo(struct gve_priv *priv, - const struct gve_device_descriptor *descriptor, - const struct gve_device_option_dqo_rda *dev_op_dqo_rda) -{ - priv->tx_desc_cnt = be16_to_cpu(descriptor->tx_queue_entries); - priv->rx_desc_cnt = be16_to_cpu(descriptor->rx_queue_entries); - - if (priv->queue_format == GVE_DQO_QPL_FORMAT) - return 0; - - priv->options_dqo_rda.tx_comp_ring_entries = - be16_to_cpu(dev_op_dqo_rda->tx_comp_ring_entries); - priv->options_dqo_rda.rx_buff_ring_entries = - be16_to_cpu(dev_op_dqo_rda->rx_buff_ring_entries); - - return 0; + /* set default ranges */ + priv->max_tx_desc_cnt = priv->tx_desc_cnt; + priv->max_rx_desc_cnt = priv->rx_desc_cnt; + priv->min_tx_desc_cnt = priv->tx_desc_cnt; + priv->min_rx_desc_cnt = priv->rx_desc_cnt; } static void gve_enable_supported_features(struct gve_priv *priv, @@ -755,7 +757,11 @@ static void gve_enable_supported_features(struct gve_priv *priv, const struct gve_device_option_jumbo_frames *dev_op_jumbo_frames, const struct gve_device_option_dqo_qpl - *dev_op_dqo_qpl) + *dev_op_dqo_qpl, + const struct gve_device_option_buffer_sizes + *dev_op_buffer_sizes, + const struct gve_device_option_modify_ring + *dev_op_modify_ring) { /* Before control reaches this point, the page-size-capped max MTU from * the gve_device_descriptor field has already been stored in @@ -768,22 +774,30 @@ static void gve_enable_supported_features(struct gve_priv *priv, priv->dev->max_mtu = be16_to_cpu(dev_op_jumbo_frames->max_mtu); } - /* Override pages for qpl for DQO-QPL */ - if (dev_op_dqo_qpl) { - priv->tx_pages_per_qpl = - be16_to_cpu(dev_op_dqo_qpl->tx_pages_per_qpl); - priv->rx_pages_per_qpl = - be16_to_cpu(dev_op_dqo_qpl->rx_pages_per_qpl); - if (priv->tx_pages_per_qpl == 0) - priv->tx_pages_per_qpl = DQO_QPL_DEFAULT_TX_PAGES; - if (priv->rx_pages_per_qpl == 0) - priv->rx_pages_per_qpl = DQO_QPL_DEFAULT_RX_PAGES; + /* Read and store ring size ranges given by device */ + if (dev_op_modify_ring && + (supported_features_mask & GVE_SUP_MODIFY_RING_MASK)) { + priv->modify_ring_size_enabled = true; + priv->max_rx_desc_cnt = + be16_to_cpu(dev_op_modify_ring->max_rx_ring_size); + priv->max_tx_desc_cnt = + be16_to_cpu(dev_op_modify_ring->max_tx_ring_size); + if (priv->default_min_ring_size) { + /* If device hasn't provided minimums, use default minimums */ + priv->min_tx_desc_cnt = GVE_DEFAULT_MIN_TX_RING_SIZE; + priv->min_rx_desc_cnt = GVE_DEFAULT_MIN_RX_RING_SIZE; + } else { + priv->min_rx_desc_cnt = be16_to_cpu(dev_op_modify_ring->min_rx_ring_size); + priv->min_tx_desc_cnt = be16_to_cpu(dev_op_modify_ring->min_tx_ring_size); + } } } int gve_adminq_describe_device(struct gve_priv *priv) { + struct gve_device_option_buffer_sizes *dev_op_buffer_sizes = NULL; struct gve_device_option_jumbo_frames *dev_op_jumbo_frames = NULL; + struct gve_device_option_modify_ring *dev_op_modify_ring = NULL; struct gve_device_option_gqi_rda *dev_op_gqi_rda = NULL; struct gve_device_option_gqi_qpl *dev_op_gqi_qpl = NULL; struct gve_device_option_dqo_rda *dev_op_dqo_rda = NULL; @@ -815,8 +829,9 @@ int gve_adminq_describe_device(struct gve_priv *priv) err = gve_process_device_options(priv, descriptor, &dev_op_gqi_rda, &dev_op_gqi_qpl, &dev_op_dqo_rda, - &dev_op_jumbo_frames, - &dev_op_dqo_qpl); + &dev_op_jumbo_frames, &dev_op_dqo_qpl, + &dev_op_buffer_sizes, + &dev_op_modify_ring); if (err) goto free_device_descriptor; @@ -851,15 +866,13 @@ int gve_adminq_describe_device(struct gve_priv *priv) dev_info(&priv->pdev->dev, "Driver is running with GQI QPL queue format.\n"); } - if (gve_is_gqi(priv)) { - err = gve_set_desc_cnt(priv, descriptor); - } else { - /* DQO supports LRO. */ + + /* set default descriptor counts */ + gve_set_default_desc_cnt(priv, descriptor); + + /* DQO supports LRO. */ + if (!gve_is_gqi(priv)) priv->dev->hw_features |= NETIF_F_LRO; - err = gve_set_desc_cnt_dqo(priv, descriptor, dev_op_dqo_rda); - } - if (err) - goto free_device_descriptor; priv->max_registered_pages = be64_to_cpu(descriptor->max_registered_pages); @@ -875,17 +888,11 @@ int gve_adminq_describe_device(struct gve_priv *priv) mac = descriptor->mac; dev_info(&priv->pdev->dev, "MAC addr: %pM\n", mac); priv->tx_pages_per_qpl = be16_to_cpu(descriptor->tx_pages_per_qpl); - priv->rx_data_slot_cnt = be16_to_cpu(descriptor->rx_pages_per_qpl); - - if (gve_is_gqi(priv) && priv->rx_data_slot_cnt < priv->rx_desc_cnt) { - dev_err(&priv->pdev->dev, "rx_data_slot_cnt cannot be smaller than rx_desc_cnt, setting rx_desc_cnt down to %d.\n", - priv->rx_data_slot_cnt); - priv->rx_desc_cnt = priv->rx_data_slot_cnt; - } priv->default_num_queues = be16_to_cpu(descriptor->default_num_queues); gve_enable_supported_features(priv, supported_features_mask, - dev_op_jumbo_frames, dev_op_dqo_qpl); + dev_op_jumbo_frames, dev_op_dqo_qpl, + dev_op_buffer_sizes, dev_op_modify_ring); free_device_descriptor: dma_pool_free(priv->adminq_pool, descriptor, descriptor_bus); diff --git a/drivers/net/ethernet/google/gve/gve_adminq.h b/drivers/net/ethernet/google/gve/gve_adminq.h index 5865ccdccbd07..676f40b788bb6 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.h +++ b/drivers/net/ethernet/google/gve/gve_adminq.h @@ -103,8 +103,7 @@ static_assert(sizeof(struct gve_device_option_gqi_qpl) == 4); struct gve_device_option_dqo_rda { __be32 supported_features_mask; - __be16 tx_comp_ring_entries; - __be16 rx_buff_ring_entries; + __be32 reserved; }; static_assert(sizeof(struct gve_device_option_dqo_rda) == 8); @@ -125,6 +124,26 @@ struct gve_device_option_jumbo_frames { static_assert(sizeof(struct gve_device_option_jumbo_frames) == 8); +struct gve_device_option_buffer_sizes { + /* GVE_SUP_BUFFER_SIZES_MASK bit should be set */ + __be32 supported_features_mask; + __be16 packet_buffer_size; + __be16 header_buffer_size; +}; + +static_assert(sizeof(struct gve_device_option_buffer_sizes) == 8); + +struct gve_device_option_modify_ring { + __be32 supported_featured_mask; + __be16 max_rx_ring_size; + __be16 max_tx_ring_size; + __be16 min_rx_ring_size; + __be16 min_tx_ring_size; +}; + +static_assert(sizeof(struct gve_device_option_modify_ring) == 12); + + /* Terminology: * * RDA - Raw DMA Addressing - Buffers associated with SKBs are directly DMA @@ -134,25 +153,31 @@ static_assert(sizeof(struct gve_device_option_jumbo_frames) == 8); * the device for read/write and data is copied from/to SKBs. */ enum gve_dev_opt_id { - GVE_DEV_OPT_ID_GQI_RAW_ADDRESSING = 0x1, - GVE_DEV_OPT_ID_GQI_RDA = 0x2, - GVE_DEV_OPT_ID_GQI_QPL = 0x3, - GVE_DEV_OPT_ID_DQO_RDA = 0x4, - GVE_DEV_OPT_ID_DQO_QPL = 0x7, - GVE_DEV_OPT_ID_JUMBO_FRAMES = 0x8, + GVE_DEV_OPT_ID_GQI_RAW_ADDRESSING = 0x1, + GVE_DEV_OPT_ID_GQI_RDA = 0x2, + GVE_DEV_OPT_ID_GQI_QPL = 0x3, + GVE_DEV_OPT_ID_DQO_RDA = 0x4, + GVE_DEV_OPT_ID_MODIFY_RING = 0x6, + GVE_DEV_OPT_ID_DQO_QPL = 0x7, + GVE_DEV_OPT_ID_JUMBO_FRAMES = 0x8, + GVE_DEV_OPT_ID_BUFFER_SIZES = 0xa, }; enum gve_dev_opt_req_feat_mask { - GVE_DEV_OPT_REQ_FEAT_MASK_GQI_RAW_ADDRESSING = 0x0, - GVE_DEV_OPT_REQ_FEAT_MASK_GQI_RDA = 0x0, - GVE_DEV_OPT_REQ_FEAT_MASK_GQI_QPL = 0x0, - GVE_DEV_OPT_REQ_FEAT_MASK_DQO_RDA = 0x0, - GVE_DEV_OPT_REQ_FEAT_MASK_JUMBO_FRAMES = 0x0, - GVE_DEV_OPT_REQ_FEAT_MASK_DQO_QPL = 0x0, + GVE_DEV_OPT_REQ_FEAT_MASK_GQI_RAW_ADDRESSING = 0x0, + GVE_DEV_OPT_REQ_FEAT_MASK_GQI_RDA = 0x0, + GVE_DEV_OPT_REQ_FEAT_MASK_GQI_QPL = 0x0, + GVE_DEV_OPT_REQ_FEAT_MASK_DQO_RDA = 0x0, + GVE_DEV_OPT_REQ_FEAT_MASK_JUMBO_FRAMES = 0x0, + GVE_DEV_OPT_REQ_FEAT_MASK_DQO_QPL = 0x0, + GVE_DEV_OPT_REQ_FEAT_MASK_BUFFER_SIZES = 0x0, + GVE_DEV_OPT_REQ_FEAT_MASK_MODIFY_RING = 0x0, }; enum gve_sup_feature_mask { - GVE_SUP_JUMBO_FRAMES_MASK = 1 << 2, + GVE_SUP_MODIFY_RING_MASK = 1 << 0, + GVE_SUP_JUMBO_FRAMES_MASK = 1 << 2, + GVE_SUP_BUFFER_SIZES_MASK = 1 << 4, }; #define GVE_DEV_OPT_LEN_GQI_RAW_ADDRESSING 0x0 diff --git a/drivers/net/ethernet/google/gve/gve_dqo.h b/drivers/net/ethernet/google/gve/gve_dqo.h index c36b93f0de15b..5e7943f811d01 100644 --- a/drivers/net/ethernet/google/gve/gve_dqo.h +++ b/drivers/net/ethernet/google/gve/gve_dqo.h @@ -38,10 +38,18 @@ netdev_features_t gve_features_check_dqo(struct sk_buff *skb, netdev_features_t features); bool gve_tx_poll_dqo(struct gve_notify_block *block, bool do_clean); int gve_rx_poll_dqo(struct gve_notify_block *block, int budget); -int gve_tx_alloc_rings_dqo(struct gve_priv *priv); -void gve_tx_free_rings_dqo(struct gve_priv *priv); -int gve_rx_alloc_rings_dqo(struct gve_priv *priv); -void gve_rx_free_rings_dqo(struct gve_priv *priv); +int gve_tx_alloc_rings_dqo(struct gve_priv *priv, + struct gve_tx_alloc_rings_cfg *cfg); +void gve_tx_free_rings_dqo(struct gve_priv *priv, + struct gve_tx_alloc_rings_cfg *cfg); +void gve_tx_start_ring_dqo(struct gve_priv *priv, int idx); +void gve_tx_stop_ring_dqo(struct gve_priv *priv, int idx); +int gve_rx_alloc_rings_dqo(struct gve_priv *priv, + struct gve_rx_alloc_rings_cfg *cfg); +void gve_rx_free_rings_dqo(struct gve_priv *priv, + struct gve_rx_alloc_rings_cfg *cfg); +void gve_rx_start_ring_dqo(struct gve_priv *priv, int idx); +void gve_rx_stop_ring_dqo(struct gve_priv *priv, int idx); int gve_clean_tx_done_dqo(struct gve_priv *priv, struct gve_tx_ring *tx, struct napi_struct *napi); void gve_rx_post_buffers_dqo(struct gve_rx_ring *rx); diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c index e5397aa1e48f2..23d46fdabe15f 100644 --- a/drivers/net/ethernet/google/gve/gve_ethtool.c +++ b/drivers/net/ethernet/google/gve/gve_ethtool.c @@ -457,7 +457,7 @@ static int gve_set_channels(struct net_device *netdev, return -EINVAL; } - if (!netif_carrier_ok(netdev)) { + if (!netif_running(netdev)) { priv->tx_cfg.num_queues = new_tx; priv->rx_cfg.num_queues = new_rx; return 0; @@ -476,12 +476,96 @@ static void gve_get_ringparam(struct net_device *netdev, { struct gve_priv *priv = netdev_priv(netdev); - cmd->rx_max_pending = priv->rx_desc_cnt; - cmd->tx_max_pending = priv->tx_desc_cnt; + cmd->rx_max_pending = priv->max_rx_desc_cnt; + cmd->tx_max_pending = priv->max_tx_desc_cnt; cmd->rx_pending = priv->rx_desc_cnt; cmd->tx_pending = priv->tx_desc_cnt; } +static int gve_adjust_ring_sizes(struct gve_priv *priv, + u16 new_tx_desc_cnt, + u16 new_rx_desc_cnt) +{ + struct gve_tx_alloc_rings_cfg tx_alloc_cfg = {0}; + struct gve_rx_alloc_rings_cfg rx_alloc_cfg = {0}; + struct gve_qpls_alloc_cfg qpls_alloc_cfg = {0}; + struct gve_qpl_config new_qpl_cfg; + int err; + + /* get current queue configuration */ + gve_get_curr_alloc_cfgs(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + + /* copy over the new ring_size from ethtool */ + tx_alloc_cfg.ring_size = new_tx_desc_cnt; + rx_alloc_cfg.ring_size = new_rx_desc_cnt; + + /* qpl_cfg is not read-only, it contains a map that gets updated as + * rings are allocated, which is why we cannot use the yet unreleased + * one in priv. + */ + qpls_alloc_cfg.qpl_cfg = &new_qpl_cfg; + tx_alloc_cfg.qpl_cfg = &new_qpl_cfg; + rx_alloc_cfg.qpl_cfg = &new_qpl_cfg; + + if (netif_running(priv->dev)) { + err = gve_adjust_config(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + if (err) + return err; + } + + /* Set new ring_size for the next up */ + priv->tx_desc_cnt = new_tx_desc_cnt; + priv->rx_desc_cnt = new_rx_desc_cnt; + + return 0; +} + +static int gve_validate_req_ring_size(struct gve_priv *priv, u16 new_tx_desc_cnt, + u16 new_rx_desc_cnt) +{ + /* check for valid range */ + if (new_tx_desc_cnt < priv->min_tx_desc_cnt || + new_tx_desc_cnt > priv->max_tx_desc_cnt || + new_rx_desc_cnt < priv->min_rx_desc_cnt || + new_rx_desc_cnt > priv->max_rx_desc_cnt) { + dev_err(&priv->pdev->dev, "Requested descriptor count out of range\n"); + return -EINVAL; + } + + if (!is_power_of_2(new_tx_desc_cnt) || !is_power_of_2(new_rx_desc_cnt)) { + dev_err(&priv->pdev->dev, "Requested descriptor count has to be a power of 2\n"); + return -EINVAL; + } + return 0; +} + +static int gve_set_ringparam(struct net_device *netdev, + struct ethtool_ringparam *cmd, + struct kernel_ethtool_ringparam *kernel_cmd, + struct netlink_ext_ack *extack) +{ + struct gve_priv *priv = netdev_priv(netdev); + u16 new_tx_cnt, new_rx_cnt; + + if (cmd->tx_pending == priv->tx_desc_cnt && cmd->rx_pending == priv->rx_desc_cnt) + return 0; + + if (!priv->modify_ring_size_enabled) { + dev_err(&priv->pdev->dev, "Modify ring size is not supported.\n"); + return -EOPNOTSUPP; + } + + new_tx_cnt = cmd->tx_pending; + new_rx_cnt = cmd->rx_pending; + + if (gve_validate_req_ring_size(priv, new_tx_cnt, new_rx_cnt)) + return -EINVAL; + + return gve_adjust_ring_sizes(priv, new_tx_cnt, new_rx_cnt); +} + static int gve_user_reset(struct net_device *netdev, u32 *flags) { struct gve_priv *priv = netdev_priv(netdev); @@ -667,6 +751,7 @@ const struct ethtool_ops gve_ethtool_ops = { .get_coalesce = gve_get_coalesce, .set_coalesce = gve_set_coalesce, .get_ringparam = gve_get_ringparam, + .set_ringparam = gve_set_ringparam, .reset = gve_user_reset, .get_tunable = gve_get_tunable, .set_tunable = gve_set_tunable, diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c index 090f1b7a48018..7d04f74814e4d 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -252,7 +253,7 @@ static irqreturn_t gve_intr_dqo(int irq, void *arg) return IRQ_HANDLED; } -static int gve_napi_poll(struct napi_struct *napi, int budget) +int gve_napi_poll(struct napi_struct *napi, int budget) { struct gve_notify_block *block; __be32 __iomem *irq_doorbell; @@ -310,7 +311,7 @@ static int gve_napi_poll(struct napi_struct *napi, int budget) return work_done; } -static int gve_napi_poll_dqo(struct napi_struct *napi, int budget) +int gve_napi_poll_dqo(struct napi_struct *napi, int budget) { struct gve_notify_block *block = container_of(napi, struct gve_notify_block, napi); @@ -589,76 +590,117 @@ static void gve_teardown_device_resources(struct gve_priv *priv) gve_clear_device_resources_ok(priv); } -static void gve_add_napi(struct gve_priv *priv, int ntfy_idx, - int (*gve_poll)(struct napi_struct *, int)) +void gve_add_napi(struct gve_priv *priv, int ntfy_idx, + int (*gve_poll)(struct napi_struct *, int)) { struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx]; netif_napi_add(priv->dev, &block->napi, gve_poll); } -static void gve_remove_napi(struct gve_priv *priv, int ntfy_idx) +void gve_remove_napi(struct gve_priv *priv, int ntfy_idx) { struct gve_notify_block *block = &priv->ntfy_blocks[ntfy_idx]; netif_napi_del(&block->napi); } +static int gve_unregister_qpl(struct gve_priv *priv, u32 i) +{ + int err; + + err = gve_adminq_unregister_page_list(priv, priv->qpls[i].id); + if (err) { + netif_err(priv, drv, priv->dev, + "Failed to unregister queue page list %d\n", + priv->qpls[i].id); + return err; + } + + priv->num_registered_pages -= priv->qpls[i].num_entries; + return 0; +} + +static int gve_register_qpl(struct gve_priv *priv, u32 i) +{ + int num_rx_qpls; + int pages; + int err; + + /* Rx QPLs succeed Tx QPLs in the priv->qpls array. */ + num_rx_qpls = gve_num_rx_qpls(&priv->rx_cfg, gve_is_qpl(priv)); + if (i >= gve_rx_start_qpl_id(&priv->tx_cfg) + num_rx_qpls) { + netif_err(priv, drv, priv->dev, + "Cannot register nonexisting QPL at index %d\n", i); + return -EINVAL; + } + + pages = priv->qpls[i].num_entries; + + if (pages + priv->num_registered_pages > priv->max_registered_pages) { + netif_err(priv, drv, priv->dev, + "Reached max number of registered pages %llu > %llu\n", + pages + priv->num_registered_pages, + priv->max_registered_pages); + return -EINVAL; + } + + err = gve_adminq_register_page_list(priv, &priv->qpls[i]); + if (err) { + netif_err(priv, drv, priv->dev, + "failed to register queue page list %d\n", + priv->qpls[i].id); + /* This failure will trigger a reset - no need to clean + * up + */ + return err; + } + + priv->num_registered_pages += pages; + return 0; +} + static int gve_register_xdp_qpls(struct gve_priv *priv) { int start_id; int err; int i; - start_id = gve_tx_qpl_id(priv, gve_xdp_tx_start_queue_id(priv)); + start_id = gve_xdp_tx_start_queue_id(priv); for (i = start_id; i < start_id + gve_num_xdp_qpls(priv); i++) { - err = gve_adminq_register_page_list(priv, &priv->qpls[i]); - if (err) { - netif_err(priv, drv, priv->dev, - "failed to register queue page list %d\n", - priv->qpls[i].id); - /* This failure will trigger a reset - no need to clean - * up - */ + err = gve_register_qpl(priv, i); + /* This failure will trigger a reset - no need to clean up */ + if (err) return err; - } } return 0; } static int gve_register_qpls(struct gve_priv *priv) { + int num_tx_qpls, num_rx_qpls; int start_id; int err; int i; - start_id = gve_tx_start_qpl_id(priv); - for (i = start_id; i < start_id + gve_num_tx_qpls(priv); i++) { - err = gve_adminq_register_page_list(priv, &priv->qpls[i]); - if (err) { - netif_err(priv, drv, priv->dev, - "failed to register queue page list %d\n", - priv->qpls[i].id); - /* This failure will trigger a reset - no need to clean - * up - */ + num_tx_qpls = gve_num_tx_qpls(&priv->tx_cfg, gve_num_xdp_qpls(priv), + gve_is_qpl(priv)); + num_rx_qpls = gve_num_rx_qpls(&priv->rx_cfg, gve_is_qpl(priv)); + + for (i = 0; i < num_tx_qpls; i++) { + err = gve_register_qpl(priv, i); + if (err) return err; - } } - start_id = gve_rx_start_qpl_id(priv); - for (i = start_id; i < start_id + gve_num_rx_qpls(priv); i++) { - err = gve_adminq_register_page_list(priv, &priv->qpls[i]); - if (err) { - netif_err(priv, drv, priv->dev, - "failed to register queue page list %d\n", - priv->qpls[i].id); - /* This failure will trigger a reset - no need to clean - * up - */ + /* there might be a gap between the tx and rx qpl ids */ + start_id = gve_rx_start_qpl_id(&priv->tx_cfg); + for (i = 0; i < num_rx_qpls; i++) { + err = gve_register_qpl(priv, start_id + i); + if (err) return err; - } } + return 0; } @@ -668,48 +710,40 @@ static int gve_unregister_xdp_qpls(struct gve_priv *priv) int err; int i; - start_id = gve_tx_qpl_id(priv, gve_xdp_tx_start_queue_id(priv)); + start_id = gve_xdp_tx_start_queue_id(priv); for (i = start_id; i < start_id + gve_num_xdp_qpls(priv); i++) { - err = gve_adminq_unregister_page_list(priv, priv->qpls[i].id); - /* This failure will trigger a reset - no need to clean up */ - if (err) { - netif_err(priv, drv, priv->dev, - "Failed to unregister queue page list %d\n", - priv->qpls[i].id); + err = gve_unregister_qpl(priv, i); + /* This failure will trigger a reset - no need to clean */ + if (err) return err; - } } return 0; } static int gve_unregister_qpls(struct gve_priv *priv) { + int num_tx_qpls, num_rx_qpls; int start_id; int err; int i; - start_id = gve_tx_start_qpl_id(priv); - for (i = start_id; i < start_id + gve_num_tx_qpls(priv); i++) { - err = gve_adminq_unregister_page_list(priv, priv->qpls[i].id); - /* This failure will trigger a reset - no need to clean up */ - if (err) { - netif_err(priv, drv, priv->dev, - "Failed to unregister queue page list %d\n", - priv->qpls[i].id); + num_tx_qpls = gve_num_tx_qpls(&priv->tx_cfg, gve_num_xdp_qpls(priv), + gve_is_qpl(priv)); + num_rx_qpls = gve_num_rx_qpls(&priv->rx_cfg, gve_is_qpl(priv)); + + for (i = 0; i < num_tx_qpls; i++) { + err = gve_unregister_qpl(priv, i); + /* This failure will trigger a reset - no need to clean */ + if (err) return err; - } } - start_id = gve_rx_start_qpl_id(priv); - for (i = start_id; i < start_id + gve_num_rx_qpls(priv); i++) { - err = gve_adminq_unregister_page_list(priv, priv->qpls[i].id); - /* This failure will trigger a reset - no need to clean up */ - if (err) { - netif_err(priv, drv, priv->dev, - "Failed to unregister queue page list %d\n", - priv->qpls[i].id); + start_id = gve_rx_start_qpl_id(&priv->tx_cfg); + for (i = 0; i < num_rx_qpls; i++) { + err = gve_unregister_qpl(priv, start_id + i); + /* This failure will trigger a reset - no need to clean */ + if (err) return err; - } } return 0; } @@ -784,120 +818,126 @@ static int gve_create_rings(struct gve_priv *priv) return 0; } -static void add_napi_init_xdp_sync_stats(struct gve_priv *priv, - int (*napi_poll)(struct napi_struct *napi, - int budget)) +static void init_xdp_sync_stats(struct gve_priv *priv) { int start_id = gve_xdp_tx_start_queue_id(priv); int i; - /* Add xdp tx napi & init sync stats*/ + /* Init stats */ for (i = start_id; i < start_id + priv->num_xdp_queues; i++) { int ntfy_idx = gve_tx_idx_to_ntfy(priv, i); u64_stats_init(&priv->tx[i].statss); priv->tx[i].ntfy_id = ntfy_idx; - gve_add_napi(priv, ntfy_idx, napi_poll); } } -static void add_napi_init_sync_stats(struct gve_priv *priv, - int (*napi_poll)(struct napi_struct *napi, - int budget)) +static void gve_init_sync_stats(struct gve_priv *priv) { int i; - /* Add tx napi & init sync stats*/ - for (i = 0; i < gve_num_tx_queues(priv); i++) { - int ntfy_idx = gve_tx_idx_to_ntfy(priv, i); - + for (i = 0; i < priv->tx_cfg.num_queues; i++) u64_stats_init(&priv->tx[i].statss); - priv->tx[i].ntfy_id = ntfy_idx; - gve_add_napi(priv, ntfy_idx, napi_poll); - } - /* Add rx napi & init sync stats*/ - for (i = 0; i < priv->rx_cfg.num_queues; i++) { - int ntfy_idx = gve_rx_idx_to_ntfy(priv, i); + /* Init stats for XDP TX queues */ + init_xdp_sync_stats(priv); + + for (i = 0; i < priv->rx_cfg.num_queues; i++) u64_stats_init(&priv->rx[i].statss); - priv->rx[i].ntfy_id = ntfy_idx; - gve_add_napi(priv, ntfy_idx, napi_poll); +} + +static void gve_tx_get_curr_alloc_cfg(struct gve_priv *priv, + struct gve_tx_alloc_rings_cfg *cfg) +{ + int num_xdp_queues = priv->xdp_prog ? priv->rx_cfg.num_queues : 0; + + cfg->qcfg = &priv->tx_cfg; + cfg->raw_addressing = !gve_is_qpl(priv); + cfg->qpls = priv->qpls; + cfg->qpl_cfg = &priv->qpl_cfg; + cfg->ring_size = priv->tx_desc_cnt; + cfg->start_idx = 0; + cfg->num_rings = priv->tx_cfg.num_queues + num_xdp_queues; + cfg->tx = priv->tx; +} + +static void gve_tx_stop_rings(struct gve_priv *priv, int start_id, int num_rings) +{ + int i; + + if (!priv->tx) + return; + + for (i = start_id; i < start_id + num_rings; i++) { + if (gve_is_gqi(priv)) + gve_tx_stop_ring_gqi(priv, i); + else + gve_tx_stop_ring_dqo(priv, i); } } -static void gve_tx_free_rings(struct gve_priv *priv, int start_id, int num_rings) +static void gve_tx_start_rings(struct gve_priv *priv, int start_id, + int num_rings) { - if (gve_is_gqi(priv)) { - gve_tx_free_rings_gqi(priv, start_id, num_rings); - } else { - gve_tx_free_rings_dqo(priv); + int i; + + for (i = start_id; i < start_id + num_rings; i++) { + if (gve_is_gqi(priv)) + gve_tx_start_ring_gqi(priv, i); + else + gve_tx_start_ring_dqo(priv, i); } } static int gve_alloc_xdp_rings(struct gve_priv *priv) { - int start_id; + struct gve_tx_alloc_rings_cfg cfg = {0}; int err = 0; if (!priv->num_xdp_queues) return 0; - start_id = gve_xdp_tx_start_queue_id(priv); - err = gve_tx_alloc_rings(priv, start_id, priv->num_xdp_queues); + gve_tx_get_curr_alloc_cfg(priv, &cfg); + cfg.start_idx = gve_xdp_tx_start_queue_id(priv); + cfg.num_rings = priv->num_xdp_queues; + + err = gve_tx_alloc_rings_gqi(priv, &cfg); if (err) return err; - add_napi_init_xdp_sync_stats(priv, gve_napi_poll); + + gve_tx_start_rings(priv, cfg.start_idx, cfg.num_rings); + init_xdp_sync_stats(priv); return 0; } -static int gve_alloc_rings(struct gve_priv *priv) +static int gve_alloc_rings(struct gve_priv *priv, + struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, + struct gve_rx_alloc_rings_cfg *rx_alloc_cfg) { int err; - /* Setup tx rings */ - priv->tx = kvcalloc(priv->tx_cfg.max_queues, sizeof(*priv->tx), - GFP_KERNEL); - if (!priv->tx) - return -ENOMEM; - if (gve_is_gqi(priv)) - err = gve_tx_alloc_rings(priv, 0, gve_num_tx_queues(priv)); + err = gve_tx_alloc_rings_gqi(priv, tx_alloc_cfg); else - err = gve_tx_alloc_rings_dqo(priv); + err = gve_tx_alloc_rings_dqo(priv, tx_alloc_cfg); if (err) - goto free_tx; - - /* Setup rx rings */ - priv->rx = kvcalloc(priv->rx_cfg.max_queues, sizeof(*priv->rx), - GFP_KERNEL); - if (!priv->rx) { - err = -ENOMEM; - goto free_tx_queue; - } + return err; if (gve_is_gqi(priv)) - err = gve_rx_alloc_rings(priv); + err = gve_rx_alloc_rings_gqi(priv, rx_alloc_cfg); else - err = gve_rx_alloc_rings_dqo(priv); + err = gve_rx_alloc_rings_dqo(priv, rx_alloc_cfg); if (err) - goto free_rx; - - if (gve_is_gqi(priv)) - add_napi_init_sync_stats(priv, gve_napi_poll); - else - add_napi_init_sync_stats(priv, gve_napi_poll_dqo); + goto free_tx; return 0; -free_rx: - kvfree(priv->rx); - priv->rx = NULL; -free_tx_queue: - gve_tx_free_rings(priv, 0, gve_num_tx_queues(priv)); free_tx: - kvfree(priv->tx); - priv->tx = NULL; + if (gve_is_gqi(priv)) + gve_tx_free_rings_gqi(priv, tx_alloc_cfg); + else + gve_tx_free_rings_dqo(priv, tx_alloc_cfg); return err; } @@ -945,52 +985,30 @@ static int gve_destroy_rings(struct gve_priv *priv) return 0; } -static void gve_rx_free_rings(struct gve_priv *priv) -{ - if (gve_is_gqi(priv)) - gve_rx_free_rings_gqi(priv); - else - gve_rx_free_rings_dqo(priv); -} - static void gve_free_xdp_rings(struct gve_priv *priv) { - int ntfy_idx, start_id; - int i; + struct gve_tx_alloc_rings_cfg cfg = {0}; + + gve_tx_get_curr_alloc_cfg(priv, &cfg); + cfg.start_idx = gve_xdp_tx_start_queue_id(priv); + cfg.num_rings = priv->num_xdp_queues; - start_id = gve_xdp_tx_start_queue_id(priv); if (priv->tx) { - for (i = start_id; i < start_id + priv->num_xdp_queues; i++) { - ntfy_idx = gve_tx_idx_to_ntfy(priv, i); - gve_remove_napi(priv, ntfy_idx); - } - gve_tx_free_rings(priv, start_id, priv->num_xdp_queues); + gve_tx_stop_rings(priv, cfg.start_idx, cfg.num_rings); + gve_tx_free_rings_gqi(priv, &cfg); } } -static void gve_free_rings(struct gve_priv *priv) +static void gve_free_rings(struct gve_priv *priv, + struct gve_tx_alloc_rings_cfg *tx_cfg, + struct gve_rx_alloc_rings_cfg *rx_cfg) { - int num_tx_queues = gve_num_tx_queues(priv); - int ntfy_idx; - int i; - - if (priv->tx) { - for (i = 0; i < num_tx_queues; i++) { - ntfy_idx = gve_tx_idx_to_ntfy(priv, i); - gve_remove_napi(priv, ntfy_idx); - } - gve_tx_free_rings(priv, 0, num_tx_queues); - kvfree(priv->tx); - priv->tx = NULL; - } - if (priv->rx) { - for (i = 0; i < priv->rx_cfg.num_queues; i++) { - ntfy_idx = gve_rx_idx_to_ntfy(priv, i); - gve_remove_napi(priv, ntfy_idx); - } - gve_rx_free_rings(priv); - kvfree(priv->rx); - priv->rx = NULL; + if (gve_is_gqi(priv)) { + gve_tx_free_rings_gqi(priv, tx_cfg); + gve_rx_free_rings_gqi(priv, rx_cfg); + } else { + gve_tx_free_rings_dqo(priv, tx_cfg); + gve_rx_free_rings_dqo(priv, rx_cfg); } } @@ -1012,21 +1030,13 @@ int gve_alloc_page(struct gve_priv *priv, struct device *dev, return 0; } -static int gve_alloc_queue_page_list(struct gve_priv *priv, u32 id, - int pages) +static int gve_alloc_queue_page_list(struct gve_priv *priv, + struct gve_queue_page_list *qpl, + u32 id, int pages) { - struct gve_queue_page_list *qpl = &priv->qpls[id]; int err; int i; - if (pages + priv->num_registered_pages > priv->max_registered_pages) { - netif_err(priv, drv, priv->dev, - "Reached max number of registered pages %llu > %llu\n", - pages + priv->num_registered_pages, - priv->max_registered_pages); - return -EINVAL; - } - qpl->id = id; qpl->num_entries = 0; qpl->pages = kvcalloc(pages, sizeof(*qpl->pages), GFP_KERNEL); @@ -1047,7 +1057,6 @@ static int gve_alloc_queue_page_list(struct gve_priv *priv, u32 id, return -ENOMEM; qpl->num_entries++; } - priv->num_registered_pages += pages; return 0; } @@ -1061,9 +1070,10 @@ void gve_free_page(struct device *dev, struct page *page, dma_addr_t dma, put_page(page); } -static void gve_free_queue_page_list(struct gve_priv *priv, u32 id) +static void gve_free_queue_page_list(struct gve_priv *priv, + struct gve_queue_page_list *qpl, + int id) { - struct gve_queue_page_list *qpl = &priv->qpls[id]; int i; if (!qpl->pages) @@ -1080,19 +1090,30 @@ static void gve_free_queue_page_list(struct gve_priv *priv, u32 id) free_pages: kvfree(qpl->pages); qpl->pages = NULL; - priv->num_registered_pages -= qpl->num_entries; } -static int gve_alloc_xdp_qpls(struct gve_priv *priv) +static void gve_free_n_qpls(struct gve_priv *priv, + struct gve_queue_page_list *qpls, + int start_id, + int num_qpls) +{ + int i; + + for (i = start_id; i < start_id + num_qpls; i++) + gve_free_queue_page_list(priv, &qpls[i], i); +} + +static int gve_alloc_n_qpls(struct gve_priv *priv, + struct gve_queue_page_list *qpls, + int page_count, + int start_id, + int num_qpls) { - int start_id; - int i, j; int err; + int i; - start_id = gve_tx_qpl_id(priv, gve_xdp_tx_start_queue_id(priv)); - for (i = start_id; i < start_id + gve_num_xdp_qpls(priv); i++) { - err = gve_alloc_queue_page_list(priv, i, - priv->tx_pages_per_qpl); + for (i = start_id; i < start_id + num_qpls; i++) { + err = gve_alloc_queue_page_list(priv, &qpls[i], i, page_count); if (err) goto free_qpls; } @@ -1100,95 +1121,117 @@ static int gve_alloc_xdp_qpls(struct gve_priv *priv) return 0; free_qpls: - for (j = start_id; j <= i; j++) - gve_free_queue_page_list(priv, j); + /* Must include the failing QPL too for gve_alloc_queue_page_list fails + * without cleaning up. + */ + gve_free_n_qpls(priv, qpls, start_id, i - start_id + 1); return err; } -static int gve_alloc_qpls(struct gve_priv *priv) +static int gve_alloc_qpls(struct gve_priv *priv, struct gve_qpls_alloc_cfg *cfg, + struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, + struct gve_rx_alloc_rings_cfg *rx_alloc_cfg) { - int max_queues = priv->tx_cfg.max_queues + priv->rx_cfg.max_queues; - int page_count; - int start_id; - int i, j; + int max_queues = cfg->tx_cfg->max_queues + cfg->rx_cfg->max_queues; + int rx_start_id, tx_num_qpls, rx_num_qpls; + struct gve_queue_page_list *qpls; + u32 tx_page_count, rx_page_count; + u32 page_count; int err; - if (!gve_is_qpl(priv)) + if (cfg->raw_addressing) return 0; - priv->qpls = kvcalloc(max_queues, sizeof(*priv->qpls), GFP_KERNEL); - if (!priv->qpls) + qpls = kvcalloc(max_queues, sizeof(*qpls), GFP_KERNEL); + if (!qpls) return -ENOMEM; - start_id = gve_tx_start_qpl_id(priv); - page_count = priv->tx_pages_per_qpl; - for (i = start_id; i < start_id + gve_num_tx_qpls(priv); i++) { - err = gve_alloc_queue_page_list(priv, i, - page_count); - if (err) - goto free_qpls; + cfg->qpl_cfg->qpl_map_size = BITS_TO_LONGS(max_queues) * + sizeof(unsigned long) * BITS_PER_BYTE; + cfg->qpl_cfg->qpl_id_map = kvcalloc(BITS_TO_LONGS(max_queues), + sizeof(unsigned long), GFP_KERNEL); + if (!cfg->qpl_cfg->qpl_id_map) { + err = -ENOMEM; + goto free_qpl_array; } - start_id = gve_rx_start_qpl_id(priv); - - /* For GQI_QPL number of pages allocated have 1:1 relationship with - * number of descriptors. For DQO, number of pages required are - * more than descriptors (because of out of order completions). + /* Compute the number of pages per QPL. For DQO-QPL, honor the device's + * max_registered_pages limit by allocating up to (tx ring_size / 2) + * pages per TX QPL and up to (rx ring_size * 2) pages per RX QPL, + * shrinking proportionally if the total would exceed the limit. For + * GQI-QPL the RX page count keeps a 1:1 relationship with descriptors. */ - page_count = priv->queue_format == GVE_GQI_QPL_FORMAT ? - priv->rx_data_slot_cnt : priv->rx_pages_per_qpl; - for (i = start_id; i < start_id + gve_num_rx_qpls(priv); i++) { - err = gve_alloc_queue_page_list(priv, i, - page_count); - if (err) - goto free_qpls; - } + tx_page_count = priv->tx_pages_per_qpl; - priv->qpl_cfg.qpl_map_size = BITS_TO_LONGS(max_queues) * - sizeof(unsigned long) * BITS_PER_BYTE; - priv->qpl_cfg.qpl_id_map = kvcalloc(BITS_TO_LONGS(max_queues), - sizeof(unsigned long), GFP_KERNEL); - if (!priv->qpl_cfg.qpl_id_map) { - err = -ENOMEM; - goto free_qpls; - } + if (cfg->is_gqi) { + rx_page_count = rx_alloc_cfg->ring_size; + } else { + u16 tx_num_queues = cfg->tx_cfg->num_queues; + u16 rx_num_queues = cfg->rx_cfg->num_queues; + u64 ideal_tx_pages, ideal_rx_pages, max_pages, tx_pages; + + ideal_tx_pages = (u64)tx_alloc_cfg->ring_size * tx_num_queues / 2; + ideal_rx_pages = (u64)rx_alloc_cfg->ring_size * rx_num_queues * 2; + max_pages = min(priv->max_registered_pages, + ideal_tx_pages + ideal_rx_pages); + + tx_pages = div64_u64(max_pages * ideal_tx_pages, + ideal_tx_pages + ideal_rx_pages); + tx_page_count = div_u64(tx_pages, tx_num_queues); + rx_page_count = div_u64(max_pages - tx_pages, rx_num_queues); + } + + /* Store the computed per-QPL page counts for the datapath to consume */ + tx_alloc_cfg->pages_per_qpl = tx_page_count; + rx_alloc_cfg->pages_per_qpl = rx_page_count; + + /* Allocate TX QPLs */ + page_count = tx_page_count; + tx_num_qpls = gve_num_tx_qpls(cfg->tx_cfg, cfg->num_xdp_queues, + gve_is_qpl(priv)); + err = gve_alloc_n_qpls(priv, qpls, page_count, 0, tx_num_qpls); + if (err) + goto free_qpl_map; + /* Allocate RX QPLs */ + rx_start_id = gve_rx_start_qpl_id(cfg->tx_cfg); + page_count = rx_page_count; + rx_num_qpls = gve_num_rx_qpls(cfg->rx_cfg, gve_is_qpl(priv)); + err = gve_alloc_n_qpls(priv, qpls, page_count, rx_start_id, rx_num_qpls); + if (err) + goto free_tx_qpls; + + cfg->qpls = qpls; return 0; -free_qpls: - for (j = 0; j <= i; j++) - gve_free_queue_page_list(priv, j); - kvfree(priv->qpls); - priv->qpls = NULL; +free_tx_qpls: + gve_free_n_qpls(priv, qpls, 0, tx_num_qpls); +free_qpl_map: + kvfree(cfg->qpl_cfg->qpl_id_map); + cfg->qpl_cfg->qpl_id_map = NULL; +free_qpl_array: + kvfree(qpls); return err; } -static void gve_free_xdp_qpls(struct gve_priv *priv) +static void gve_free_qpls(struct gve_priv *priv, + struct gve_qpls_alloc_cfg *cfg) { - int start_id; + int max_queues = cfg->tx_cfg->max_queues + cfg->rx_cfg->max_queues; + struct gve_queue_page_list *qpls = cfg->qpls; int i; - start_id = gve_tx_qpl_id(priv, gve_xdp_tx_start_queue_id(priv)); - for (i = start_id; i < start_id + gve_num_xdp_qpls(priv); i++) - gve_free_queue_page_list(priv, i); -} - -static void gve_free_qpls(struct gve_priv *priv) -{ - int max_queues = priv->tx_cfg.max_queues + priv->rx_cfg.max_queues; - int i; - - if (!priv->qpls) + if (!qpls) return; - kvfree(priv->qpl_cfg.qpl_id_map); - priv->qpl_cfg.qpl_id_map = NULL; + kvfree(cfg->qpl_cfg->qpl_id_map); + cfg->qpl_cfg->qpl_id_map = NULL; for (i = 0; i < max_queues; i++) - gve_free_queue_page_list(priv, i); + gve_free_queue_page_list(priv, &qpls[i], i); - kvfree(priv->qpls); - priv->qpls = NULL; + kvfree(qpls); + cfg->qpls = NULL; } /* Use this to schedule a reset when the device is capable of continuing @@ -1299,34 +1342,162 @@ static void gve_drain_page_cache(struct gve_priv *priv) } } -static int gve_open(struct net_device *dev) +static void gve_qpls_get_curr_alloc_cfg(struct gve_priv *priv, + struct gve_qpls_alloc_cfg *cfg) +{ + cfg->raw_addressing = !gve_is_qpl(priv); + cfg->is_gqi = gve_is_gqi(priv); + cfg->num_xdp_queues = priv->num_xdp_queues; + cfg->qpl_cfg = &priv->qpl_cfg; + cfg->tx_cfg = &priv->tx_cfg; + cfg->rx_cfg = &priv->rx_cfg; + cfg->qpls = priv->qpls; +} + +static void gve_rx_get_curr_alloc_cfg(struct gve_priv *priv, + struct gve_rx_alloc_rings_cfg *cfg) +{ + cfg->qcfg = &priv->rx_cfg; + cfg->qcfg_tx = &priv->tx_cfg; + cfg->raw_addressing = !gve_is_qpl(priv); + cfg->qpls = priv->qpls; + cfg->qpl_cfg = &priv->qpl_cfg; + cfg->ring_size = priv->rx_desc_cnt; + cfg->rx = priv->rx; +} + +void gve_get_curr_alloc_cfgs(struct gve_priv *priv, + struct gve_qpls_alloc_cfg *qpls_alloc_cfg, + struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, + struct gve_rx_alloc_rings_cfg *rx_alloc_cfg) +{ + gve_qpls_get_curr_alloc_cfg(priv, qpls_alloc_cfg); + gve_tx_get_curr_alloc_cfg(priv, tx_alloc_cfg); + gve_rx_get_curr_alloc_cfg(priv, rx_alloc_cfg); +} + +static void gve_rx_start_rings(struct gve_priv *priv, int num_rings) +{ + int i; + + for (i = 0; i < num_rings; i++) { + if (gve_is_gqi(priv)) + gve_rx_start_ring_gqi(priv, i); + else + gve_rx_start_ring_dqo(priv, i); + } +} + +static void gve_rx_stop_rings(struct gve_priv *priv, int num_rings) +{ + int i; + + if (!priv->rx) + return; + + for (i = 0; i < num_rings; i++) { + if (gve_is_gqi(priv)) + gve_rx_stop_ring_gqi(priv, i); + else + gve_rx_stop_ring_dqo(priv, i); + } +} + +static void gve_queues_mem_free(struct gve_priv *priv, + struct gve_qpls_alloc_cfg *qpls_alloc_cfg, + struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, + struct gve_rx_alloc_rings_cfg *rx_alloc_cfg) +{ + gve_free_rings(priv, tx_alloc_cfg, rx_alloc_cfg); + gve_free_qpls(priv, qpls_alloc_cfg); +} + +static int gve_queues_mem_alloc(struct gve_priv *priv, + struct gve_qpls_alloc_cfg *qpls_alloc_cfg, + struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, + struct gve_rx_alloc_rings_cfg *rx_alloc_cfg) { - struct gve_priv *priv = netdev_priv(dev); int err; + err = gve_alloc_qpls(priv, qpls_alloc_cfg, tx_alloc_cfg, rx_alloc_cfg); + if (err) { + netif_err(priv, drv, priv->dev, "Failed to alloc QPLs\n"); + return err; + } + tx_alloc_cfg->qpls = qpls_alloc_cfg->qpls; + rx_alloc_cfg->qpls = qpls_alloc_cfg->qpls; + err = gve_alloc_rings(priv, tx_alloc_cfg, rx_alloc_cfg); + if (err) { + netif_err(priv, drv, priv->dev, "Failed to alloc rings\n"); + goto free_qpls; + } + + return 0; + +free_qpls: + gve_free_qpls(priv, qpls_alloc_cfg); + return err; +} + +static void gve_queues_mem_remove(struct gve_priv *priv) +{ + struct gve_tx_alloc_rings_cfg tx_alloc_cfg = {0}; + struct gve_rx_alloc_rings_cfg rx_alloc_cfg = {0}; + struct gve_qpls_alloc_cfg qpls_alloc_cfg = {0}; + + gve_get_curr_alloc_cfgs(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + gve_queues_mem_free(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + priv->qpls = NULL; + priv->tx = NULL; + priv->rx = NULL; +} + +/* The passed-in queue memory is stored into priv and the queues are made live. + * No memory is allocated. Passed-in memory is freed on errors. + */ +static int gve_queues_start(struct gve_priv *priv, + struct gve_qpls_alloc_cfg *qpls_alloc_cfg, + struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, + struct gve_rx_alloc_rings_cfg *rx_alloc_cfg) +{ + struct net_device *dev = priv->dev; + int err; + + /* Record new resources into priv */ + priv->qpls = qpls_alloc_cfg->qpls; + priv->tx = tx_alloc_cfg->tx; + priv->rx = rx_alloc_cfg->rx; + + /* Record new configs into priv */ + priv->qpl_cfg = *qpls_alloc_cfg->qpl_cfg; + priv->tx_cfg = *tx_alloc_cfg->qcfg; + priv->rx_cfg = *rx_alloc_cfg->qcfg; + priv->tx_desc_cnt = tx_alloc_cfg->ring_size; + priv->rx_desc_cnt = rx_alloc_cfg->ring_size; + priv->tx_pages_per_qpl = tx_alloc_cfg->pages_per_qpl; + priv->rx_pages_per_qpl = rx_alloc_cfg->pages_per_qpl; + if (priv->xdp_prog) priv->num_xdp_queues = priv->rx_cfg.num_queues; else priv->num_xdp_queues = 0; - err = gve_alloc_qpls(priv); - if (err) - return err; - - err = gve_alloc_rings(priv); - if (err) - goto free_qpls; + gve_tx_start_rings(priv, 0, tx_alloc_cfg->num_rings); + gve_rx_start_rings(priv, rx_alloc_cfg->qcfg->num_queues); + gve_init_sync_stats(priv); err = netif_set_real_num_tx_queues(dev, priv->tx_cfg.num_queues); if (err) - goto free_rings; + goto stop_and_free_rings; err = netif_set_real_num_rx_queues(dev, priv->rx_cfg.num_queues); if (err) - goto free_rings; + goto stop_and_free_rings; err = gve_reg_xdp_info(priv, dev); if (err) - goto free_rings; + goto stop_and_free_rings; err = gve_register_qpls(priv); if (err) @@ -1354,32 +1525,53 @@ static int gve_open(struct net_device *dev) priv->interface_up_cnt++; return 0; -free_rings: - gve_free_rings(priv); -free_qpls: - gve_free_qpls(priv); - return err; - reset: - /* This must have been called from a reset due to the rtnl lock - * so just return at this point. - */ if (gve_get_reset_in_progress(priv)) - return err; - /* Otherwise reset before returning */ + goto stop_and_free_rings; gve_reset_and_teardown(priv, true); /* if this fails there is nothing we can do so just ignore the return */ gve_reset_recovery(priv, false); /* return the original error */ return err; +stop_and_free_rings: + gve_tx_stop_rings(priv, 0, gve_num_tx_queues(priv)); + gve_rx_stop_rings(priv, priv->rx_cfg.num_queues); + gve_queues_mem_remove(priv); + return err; } -static int gve_close(struct net_device *dev) +static int gve_open(struct net_device *dev) { + struct gve_tx_alloc_rings_cfg tx_alloc_cfg = {0}; + struct gve_rx_alloc_rings_cfg rx_alloc_cfg = {0}; + struct gve_qpls_alloc_cfg qpls_alloc_cfg = {0}; struct gve_priv *priv = netdev_priv(dev); int err; - netif_carrier_off(dev); + gve_get_curr_alloc_cfgs(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + + err = gve_queues_mem_alloc(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + if (err) + return err; + + /* No need to free on error: ownership of resources is lost after + * calling gve_queues_start. + */ + err = gve_queues_start(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + if (err) + return err; + + return 0; +} + +static int gve_queues_stop(struct gve_priv *priv) +{ + int err; + + netif_carrier_off(priv->dev); if (gve_get_device_rings_ok(priv)) { gve_turndown(priv); gve_drain_page_cache(priv); @@ -1394,8 +1586,10 @@ static int gve_close(struct net_device *dev) del_timer_sync(&priv->stats_report_timer); gve_unreg_xdp_info(priv); - gve_free_rings(priv); - gve_free_qpls(priv); + + gve_tx_stop_rings(priv, 0, gve_num_tx_queues(priv)); + gve_rx_stop_rings(priv, priv->rx_cfg.num_queues); + priv->interface_down_cnt++; return 0; @@ -1410,10 +1604,26 @@ static int gve_close(struct net_device *dev) return gve_reset_recovery(priv, false); } +static int gve_close(struct net_device *dev) +{ + struct gve_priv *priv = netdev_priv(dev); + int err; + + err = gve_queues_stop(priv); + if (err) + return err; + + gve_queues_mem_remove(priv); + return 0; +} + static int gve_remove_xdp_queues(struct gve_priv *priv) { + int qpl_start_id; int err; + qpl_start_id = gve_xdp_tx_start_queue_id(priv); + err = gve_destroy_xdp_rings(priv); if (err) return err; @@ -1424,18 +1634,22 @@ static int gve_remove_xdp_queues(struct gve_priv *priv) gve_unreg_xdp_info(priv); gve_free_xdp_rings(priv); - gve_free_xdp_qpls(priv); + + gve_free_n_qpls(priv, priv->qpls, qpl_start_id, gve_num_xdp_qpls(priv)); priv->num_xdp_queues = 0; return 0; } static int gve_add_xdp_queues(struct gve_priv *priv) { + int start_id; int err; - priv->num_xdp_queues = priv->tx_cfg.num_queues; + priv->num_xdp_queues = priv->rx_cfg.num_queues; - err = gve_alloc_xdp_qpls(priv); + start_id = gve_xdp_tx_start_queue_id(priv); + err = gve_alloc_n_qpls(priv, priv->qpls, priv->tx_pages_per_qpl, + start_id, gve_num_xdp_qpls(priv)); if (err) goto err; @@ -1460,7 +1674,7 @@ static int gve_add_xdp_queues(struct gve_priv *priv) free_xdp_rings: gve_free_xdp_rings(priv); free_xdp_qpls: - gve_free_xdp_qpls(priv); + gve_free_n_qpls(priv, priv->qpls, start_id, gve_num_xdp_qpls(priv)); err: priv->num_xdp_queues = 0; return err; @@ -1491,7 +1705,7 @@ static int gve_set_xdp(struct gve_priv *priv, struct bpf_prog *prog, u32 status; old_prog = READ_ONCE(priv->xdp_prog); - if (!netif_carrier_ok(priv->dev)) { + if (!netif_running(priv->dev)) { WRITE_ONCE(priv->xdp_prog, prog); if (old_prog) bpf_prog_put(old_prog); @@ -1701,42 +1915,92 @@ static int gve_xdp(struct net_device *dev, struct netdev_bpf *xdp) } } +int gve_adjust_config(struct gve_priv *priv, + struct gve_qpls_alloc_cfg *qpls_alloc_cfg, + struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, + struct gve_rx_alloc_rings_cfg *rx_alloc_cfg) +{ + int err; + + /* Allocate resources for the new confiugration */ + err = gve_queues_mem_alloc(priv, qpls_alloc_cfg, + tx_alloc_cfg, rx_alloc_cfg); + if (err) { + netif_err(priv, drv, priv->dev, + "Adjust config failed to alloc new queues"); + return err; + } + + /* Teardown the device and free existing resources */ + err = gve_close(priv->dev); + if (err) { + netif_err(priv, drv, priv->dev, + "Adjust config failed to close old queues"); + gve_queues_mem_free(priv, qpls_alloc_cfg, + tx_alloc_cfg, rx_alloc_cfg); + return err; + } + + /* Bring the device back up again with the new resources. */ + err = gve_queues_start(priv, qpls_alloc_cfg, + tx_alloc_cfg, rx_alloc_cfg); + if (err) { + netif_err(priv, drv, priv->dev, + "Adjust config failed to start new queues, !!! DISABLING ALL QUEUES !!!\n"); + /* No need to free on error: ownership of resources is lost after + * calling gve_queues_start. + */ + gve_turndown(priv); + return err; + } + + return 0; +} + int gve_adjust_queues(struct gve_priv *priv, struct gve_queue_config new_rx_config, struct gve_queue_config new_tx_config) { + struct gve_tx_alloc_rings_cfg tx_alloc_cfg = {0}; + struct gve_rx_alloc_rings_cfg rx_alloc_cfg = {0}; + struct gve_qpls_alloc_cfg qpls_alloc_cfg = {0}; + struct gve_qpl_config new_qpl_cfg; + int num_xdp_queues; int err; - if (netif_carrier_ok(priv->dev)) { - /* To make this process as simple as possible we teardown the - * device, set the new configuration, and then bring the device - * up again. - */ - err = gve_close(priv->dev); - /* we have already tried to reset in close, - * just fail at this point - */ - if (err) - return err; - priv->tx_cfg = new_tx_config; - priv->rx_cfg = new_rx_config; + gve_get_curr_alloc_cfgs(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); - err = gve_open(priv->dev); - if (err) - goto err; - - return 0; + /* qpl_cfg is not read-only, it contains a map that gets updated as + * rings are allocated, which is why we cannot use the yet unreleased + * one in priv. + */ + qpls_alloc_cfg.qpl_cfg = &new_qpl_cfg; + tx_alloc_cfg.qpl_cfg = &new_qpl_cfg; + rx_alloc_cfg.qpl_cfg = &new_qpl_cfg; + + /* Relay the new config from ethtool */ + qpls_alloc_cfg.tx_cfg = &new_tx_config; + tx_alloc_cfg.qcfg = &new_tx_config; + rx_alloc_cfg.qcfg_tx = &new_tx_config; + qpls_alloc_cfg.rx_cfg = &new_rx_config; + rx_alloc_cfg.qcfg = &new_rx_config; + tx_alloc_cfg.num_rings = new_tx_config.num_queues; + + /* Add dedicated XDP TX queues if enabled. */ + num_xdp_queues = priv->xdp_prog ? new_rx_config.num_queues : 0; + tx_alloc_cfg.num_rings += num_xdp_queues; + + if (netif_running(priv->dev)) { + err = gve_adjust_config(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + return err; } /* Set the config for the next up. */ priv->tx_cfg = new_tx_config; priv->rx_cfg = new_rx_config; return 0; -err: - netif_err(priv, drv, priv->dev, - "Adjust queues failed! !!! DISABLING ALL QUEUES !!!\n"); - gve_turndown(priv); - return err; } static void gve_turndown(struct gve_priv *priv) @@ -1859,36 +2123,37 @@ static int gve_set_features(struct net_device *netdev, netdev_features_t features) { const netdev_features_t orig_features = netdev->features; + struct gve_tx_alloc_rings_cfg tx_alloc_cfg = {0}; + struct gve_rx_alloc_rings_cfg rx_alloc_cfg = {0}; + struct gve_qpls_alloc_cfg qpls_alloc_cfg = {0}; struct gve_priv *priv = netdev_priv(netdev); + struct gve_qpl_config new_qpl_cfg; int err; + gve_get_curr_alloc_cfgs(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + /* qpl_cfg is not read-only, it contains a map that gets updated as + * rings are allocated, which is why we cannot use the yet unreleased + * one in priv. + */ + qpls_alloc_cfg.qpl_cfg = &new_qpl_cfg; + tx_alloc_cfg.qpl_cfg = &new_qpl_cfg; + rx_alloc_cfg.qpl_cfg = &new_qpl_cfg; + if ((netdev->features & NETIF_F_LRO) != (features & NETIF_F_LRO)) { netdev->features ^= NETIF_F_LRO; - if (netif_carrier_ok(netdev)) { - /* To make this process as simple as possible we - * teardown the device, set the new configuration, - * and then bring the device up again. - */ - err = gve_close(netdev); - /* We have already tried to reset in close, just fail - * at this point. - */ - if (err) - goto err; - - err = gve_open(netdev); - if (err) - goto err; + if (netif_running(netdev)) { + err = gve_adjust_config(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + if (err) { + /* Revert the change on error. */ + netdev->features = orig_features; + return err; + } } } return 0; -err: - /* Reverts the change on error. */ - netdev->features = orig_features; - netif_err(priv, drv, netdev, - "Set features failed! !!! DISABLING ALL QUEUES !!!\n"); - return err; } static const struct net_device_ops gve_netdev_ops = { @@ -2041,6 +2306,8 @@ static int gve_init_priv(struct gve_priv *priv, bool skip_describe_device) goto err; } + priv->num_registered_pages = 0; + if (skip_describe_device) goto setup_device; @@ -2066,7 +2333,6 @@ static int gve_init_priv(struct gve_priv *priv, bool skip_describe_device) goto err; } - priv->num_registered_pages = 0; priv->rx_copybreak = GVE_DEFAULT_RX_COPYBREAK; /* gvnic has one Notification Block per MSI-x vector, except for the * management vector @@ -2149,7 +2415,7 @@ static int gve_reset_recovery(struct gve_priv *priv, bool was_up) int gve_reset(struct gve_priv *priv, bool attempt_teardown) { - bool was_up = netif_carrier_ok(priv->dev); + bool was_up = netif_running(priv->dev); int err; dev_info(&priv->pdev->dev, "Performing reset\n"); @@ -2353,7 +2619,7 @@ static void gve_shutdown(struct pci_dev *pdev) { struct net_device *netdev = pci_get_drvdata(pdev); struct gve_priv *priv = netdev_priv(netdev); - bool was_up = netif_carrier_ok(priv->dev); + bool was_up = netif_running(priv->dev); rtnl_lock(); if (was_up && gve_close(priv->dev)) { @@ -2371,7 +2637,7 @@ static int gve_suspend(struct pci_dev *pdev, pm_message_t state) { struct net_device *netdev = pci_get_drvdata(pdev); struct gve_priv *priv = netdev_priv(netdev); - bool was_up = netif_carrier_ok(priv->dev); + bool was_up = netif_running(priv->dev); priv->suspend_cnt++; rtnl_lock(); diff --git a/drivers/net/ethernet/google/gve/gve_rx.c b/drivers/net/ethernet/google/gve/gve_rx.c index 7a8dc5386ffff..34f4fea540669 100644 --- a/drivers/net/ethernet/google/gve/gve_rx.c +++ b/drivers/net/ethernet/google/gve/gve_rx.c @@ -23,7 +23,9 @@ static void gve_rx_free_buffer(struct device *dev, gve_free_page(dev, page_info->page, dma, DMA_FROM_DEVICE); } -static void gve_rx_unfill_pages(struct gve_priv *priv, struct gve_rx_ring *rx) +static void gve_rx_unfill_pages(struct gve_priv *priv, + struct gve_rx_ring *rx, + struct gve_rx_alloc_rings_cfg *cfg) { u32 slots = rx->mask + 1; int i; @@ -36,7 +38,7 @@ static void gve_rx_unfill_pages(struct gve_priv *priv, struct gve_rx_ring *rx) for (i = 0; i < slots; i++) page_ref_sub(rx->data.page_info[i].page, rx->data.page_info[i].pagecnt_bias - 1); - gve_unassign_qpl(priv, rx->data.qpl->id); + gve_unassign_qpl(cfg->qpl_cfg, rx->data.qpl->id); rx->data.qpl = NULL; for (i = 0; i < rx->qpl_copy_pool_mask + 1; i++) { @@ -49,16 +51,26 @@ static void gve_rx_unfill_pages(struct gve_priv *priv, struct gve_rx_ring *rx) rx->data.page_info = NULL; } -static void gve_rx_free_ring(struct gve_priv *priv, int idx) +void gve_rx_stop_ring_gqi(struct gve_priv *priv, int idx) +{ + int ntfy_idx = gve_rx_idx_to_ntfy(priv, idx); + + if (!gve_rx_was_added_to_block(priv, idx)) + return; + + gve_remove_napi(priv, ntfy_idx); + gve_rx_remove_from_block(priv, idx); +} + +static void gve_rx_free_ring_gqi(struct gve_priv *priv, struct gve_rx_ring *rx, + struct gve_rx_alloc_rings_cfg *cfg) { - struct gve_rx_ring *rx = &priv->rx[idx]; struct device *dev = &priv->pdev->dev; u32 slots = rx->mask + 1; + int idx = rx->q_num; size_t bytes; - gve_rx_remove_from_block(priv, idx); - - bytes = sizeof(struct gve_rx_desc) * priv->rx_desc_cnt; + bytes = sizeof(struct gve_rx_desc) * cfg->ring_size; dma_free_coherent(dev, bytes, rx->desc.desc_ring, rx->desc.bus); rx->desc.desc_ring = NULL; @@ -66,7 +78,7 @@ static void gve_rx_free_ring(struct gve_priv *priv, int idx) rx->q_resources, rx->q_resources_bus); rx->q_resources = NULL; - gve_rx_unfill_pages(priv, rx); + gve_rx_unfill_pages(priv, rx, cfg); bytes = sizeof(*rx->data.data_ring) * slots; dma_free_coherent(dev, bytes, rx->data.data_ring, @@ -108,7 +120,8 @@ static int gve_rx_alloc_buffer(struct gve_priv *priv, struct device *dev, return 0; } -static int gve_prefill_rx_pages(struct gve_rx_ring *rx) +static int gve_rx_prefill_pages(struct gve_rx_ring *rx, + struct gve_rx_alloc_rings_cfg *cfg) { struct gve_priv *priv = rx->gve; u32 slots; @@ -127,7 +140,7 @@ static int gve_prefill_rx_pages(struct gve_rx_ring *rx) return -ENOMEM; if (!rx->data.raw_addressing) { - rx->data.qpl = gve_assign_rx_qpl(priv, rx->q_num); + rx->data.qpl = gve_assign_rx_qpl(cfg, rx->q_num); if (!rx->data.qpl) { kvfree(rx->data.page_info); rx->data.page_info = NULL; @@ -185,7 +198,7 @@ static int gve_prefill_rx_pages(struct gve_rx_ring *rx) page_ref_sub(rx->data.page_info[i].page, rx->data.page_info[i].pagecnt_bias - 1); - gve_unassign_qpl(priv, rx->data.qpl->id); + gve_unassign_qpl(cfg->qpl_cfg, rx->data.qpl->id); rx->data.qpl = NULL; return err; @@ -207,13 +220,23 @@ static void gve_rx_ctx_clear(struct gve_rx_ctx *ctx) ctx->drop_pkt = false; } -static int gve_rx_alloc_ring(struct gve_priv *priv, int idx) +void gve_rx_start_ring_gqi(struct gve_priv *priv, int idx) +{ + int ntfy_idx = gve_rx_idx_to_ntfy(priv, idx); + + gve_rx_add_to_block(priv, idx); + gve_add_napi(priv, ntfy_idx, gve_napi_poll); +} + +static int gve_rx_alloc_ring_gqi(struct gve_priv *priv, + struct gve_rx_alloc_rings_cfg *cfg, + struct gve_rx_ring *rx, + int idx) { - struct gve_rx_ring *rx = &priv->rx[idx]; struct device *hdev = &priv->pdev->dev; + u32 slots = cfg->ring_size; int filled_pages; size_t bytes; - u32 slots; int err; netif_dbg(priv, drv, priv->dev, "allocating rx ring\n"); @@ -223,9 +246,8 @@ static int gve_rx_alloc_ring(struct gve_priv *priv, int idx) rx->gve = priv; rx->q_num = idx; - slots = priv->rx_data_slot_cnt; rx->mask = slots - 1; - rx->data.raw_addressing = priv->queue_format == GVE_GQI_RDA_FORMAT; + rx->data.raw_addressing = cfg->raw_addressing; /* alloc rx data ring */ bytes = sizeof(*rx->data.data_ring) * slots; @@ -246,7 +268,7 @@ static int gve_rx_alloc_ring(struct gve_priv *priv, int idx) goto abort_with_slots; } - filled_pages = gve_prefill_rx_pages(rx); + filled_pages = gve_rx_prefill_pages(rx, cfg); if (filled_pages < 0) { err = -ENOMEM; goto abort_with_copy_pool; @@ -269,7 +291,7 @@ static int gve_rx_alloc_ring(struct gve_priv *priv, int idx) (unsigned long)rx->data.data_bus); /* alloc rx desc ring */ - bytes = sizeof(struct gve_rx_desc) * priv->rx_desc_cnt; + bytes = sizeof(struct gve_rx_desc) * cfg->ring_size; rx->desc.desc_ring = dma_alloc_coherent(hdev, bytes, &rx->desc.bus, GFP_KERNEL); if (!rx->desc.desc_ring) { @@ -277,15 +299,11 @@ static int gve_rx_alloc_ring(struct gve_priv *priv, int idx) goto abort_with_q_resources; } rx->cnt = 0; - rx->db_threshold = priv->rx_desc_cnt / 2; + rx->db_threshold = slots / 2; rx->desc.seqno = 1; - /* Allocating half-page buffers allows page-flipping which is faster - * than copying or allocating new pages. - */ rx->packet_buffer_size = GVE_DEFAULT_RX_BUFFER_SIZE; gve_rx_ctx_clear(&rx->ctx); - gve_rx_add_to_block(priv, idx); return 0; @@ -294,7 +312,7 @@ static int gve_rx_alloc_ring(struct gve_priv *priv, int idx) rx->q_resources, rx->q_resources_bus); rx->q_resources = NULL; abort_filled: - gve_rx_unfill_pages(priv, rx); + gve_rx_unfill_pages(priv, rx, cfg); abort_with_copy_pool: kvfree(rx->qpl_copy_pool); rx->qpl_copy_pool = NULL; @@ -306,36 +324,58 @@ static int gve_rx_alloc_ring(struct gve_priv *priv, int idx) return err; } -int gve_rx_alloc_rings(struct gve_priv *priv) +int gve_rx_alloc_rings_gqi(struct gve_priv *priv, + struct gve_rx_alloc_rings_cfg *cfg) { + struct gve_rx_ring *rx; int err = 0; - int i; + int i, j; - for (i = 0; i < priv->rx_cfg.num_queues; i++) { - err = gve_rx_alloc_ring(priv, i); + if (!cfg->raw_addressing && !cfg->qpls) { + netif_err(priv, drv, priv->dev, + "Cannot alloc QPL ring before allocing QPLs\n"); + return -EINVAL; + } + + rx = kvcalloc(cfg->qcfg->max_queues, sizeof(struct gve_rx_ring), + GFP_KERNEL); + if (!rx) + return -ENOMEM; + + for (i = 0; i < cfg->qcfg->num_queues; i++) { + err = gve_rx_alloc_ring_gqi(priv, cfg, &rx[i], i); if (err) { netif_err(priv, drv, priv->dev, "Failed to alloc rx ring=%d: err=%d\n", i, err); - break; + goto cleanup; } } - /* Unallocate if there was an error */ - if (err) { - int j; - for (j = 0; j < i; j++) - gve_rx_free_ring(priv, j); - } + cfg->rx = rx; + return 0; + +cleanup: + for (j = 0; j < i; j++) + gve_rx_free_ring_gqi(priv, &rx[j], cfg); + kvfree(rx); return err; } -void gve_rx_free_rings_gqi(struct gve_priv *priv) +void gve_rx_free_rings_gqi(struct gve_priv *priv, + struct gve_rx_alloc_rings_cfg *cfg) { + struct gve_rx_ring *rx = cfg->rx; int i; - for (i = 0; i < priv->rx_cfg.num_queues; i++) - gve_rx_free_ring(priv, i); + if (!rx) + return; + + for (i = 0; i < cfg->qcfg->num_queues; i++) + gve_rx_free_ring_gqi(priv, &rx[i], cfg); + + kvfree(rx); + cfg->rx = NULL; } void gve_rx_write_doorbell(struct gve_priv *priv, struct gve_rx_ring *rx) diff --git a/drivers/net/ethernet/google/gve/gve_rx_dqo.c b/drivers/net/ethernet/google/gve/gve_rx_dqo.c index 3d60ea25711fc..325ade10b91aa 100644 --- a/drivers/net/ethernet/google/gve/gve_rx_dqo.c +++ b/drivers/net/ethernet/google/gve/gve_rx_dqo.c @@ -199,20 +199,30 @@ static int gve_alloc_page_dqo(struct gve_rx_ring *rx, return 0; } -static void gve_rx_free_ring_dqo(struct gve_priv *priv, int idx) +void gve_rx_stop_ring_dqo(struct gve_priv *priv, int idx) +{ + int ntfy_idx = gve_rx_idx_to_ntfy(priv, idx); + + if (!gve_rx_was_added_to_block(priv, idx)) + return; + + gve_remove_napi(priv, ntfy_idx); + gve_rx_remove_from_block(priv, idx); +} + +static void gve_rx_free_ring_dqo(struct gve_priv *priv, struct gve_rx_ring *rx, + struct gve_rx_alloc_rings_cfg *cfg) { - struct gve_rx_ring *rx = &priv->rx[idx]; struct device *hdev = &priv->pdev->dev; size_t completion_queue_slots; size_t buffer_queue_slots; + int idx = rx->q_num; size_t size; int i; completion_queue_slots = rx->dqo.complq.mask + 1; buffer_queue_slots = rx->dqo.bufq.mask + 1; - gve_rx_remove_from_block(priv, idx); - if (rx->q_resources) { dma_free_coherent(hdev, sizeof(*rx->q_resources), rx->q_resources, rx->q_resources_bus); @@ -226,7 +236,7 @@ static void gve_rx_free_ring_dqo(struct gve_priv *priv, int idx) gve_free_page_dqo(priv, bs, !rx->dqo.qpl); } if (rx->dqo.qpl) { - gve_unassign_qpl(priv, rx->dqo.qpl->id); + gve_unassign_qpl(cfg->qpl_cfg, rx->dqo.qpl->id); rx->dqo.qpl = NULL; } @@ -251,17 +261,25 @@ static void gve_rx_free_ring_dqo(struct gve_priv *priv, int idx) netif_dbg(priv, drv, priv->dev, "freed rx ring %d\n", idx); } -static int gve_rx_alloc_ring_dqo(struct gve_priv *priv, int idx) +void gve_rx_start_ring_dqo(struct gve_priv *priv, int idx) +{ + int ntfy_idx = gve_rx_idx_to_ntfy(priv, idx); + + gve_rx_add_to_block(priv, idx); + gve_add_napi(priv, ntfy_idx, gve_napi_poll_dqo); +} + +static int gve_rx_alloc_ring_dqo(struct gve_priv *priv, + struct gve_rx_alloc_rings_cfg *cfg, + struct gve_rx_ring *rx, + int idx) { - struct gve_rx_ring *rx = &priv->rx[idx]; struct device *hdev = &priv->pdev->dev; size_t size; int i; - const u32 buffer_queue_slots = - priv->queue_format == GVE_DQO_RDA_FORMAT ? - priv->options_dqo_rda.rx_buff_ring_entries : priv->rx_desc_cnt; - const u32 completion_queue_slots = priv->rx_desc_cnt; + const u32 buffer_queue_slots = cfg->ring_size; + const u32 completion_queue_slots = cfg->ring_size; netif_dbg(priv, drv, priv->dev, "allocating rx ring DQO\n"); @@ -274,9 +292,9 @@ static int gve_rx_alloc_ring_dqo(struct gve_priv *priv, int idx) rx->ctx.skb_head = NULL; rx->ctx.skb_tail = NULL; - rx->dqo.num_buf_states = priv->queue_format == GVE_DQO_RDA_FORMAT ? + rx->dqo.num_buf_states = cfg->raw_addressing ? min_t(s16, S16_MAX, buffer_queue_slots * 4) : - priv->rx_pages_per_qpl; + cfg->pages_per_qpl; rx->dqo.buf_states = kvcalloc(rx->dqo.num_buf_states, sizeof(rx->dqo.buf_states[0]), GFP_KERNEL); @@ -308,8 +326,8 @@ static int gve_rx_alloc_ring_dqo(struct gve_priv *priv, int idx) if (!rx->dqo.bufq.desc_ring) goto err; - if (priv->queue_format != GVE_DQO_RDA_FORMAT) { - rx->dqo.qpl = gve_assign_rx_qpl(priv, rx->q_num); + if (!cfg->raw_addressing) { + rx->dqo.qpl = gve_assign_rx_qpl(cfg, rx->q_num); if (!rx->dqo.qpl) goto err; rx->dqo.next_qpl_page_idx = 0; @@ -320,12 +338,10 @@ static int gve_rx_alloc_ring_dqo(struct gve_priv *priv, int idx) if (!rx->q_resources) goto err; - gve_rx_add_to_block(priv, idx); - return 0; err: - gve_rx_free_ring_dqo(priv, idx); + gve_rx_free_ring_dqo(priv, rx, cfg); return -ENOMEM; } @@ -337,13 +353,26 @@ void gve_rx_write_doorbell_dqo(const struct gve_priv *priv, int queue_idx) iowrite32(rx->dqo.bufq.tail, &priv->db_bar2[index]); } -int gve_rx_alloc_rings_dqo(struct gve_priv *priv) +int gve_rx_alloc_rings_dqo(struct gve_priv *priv, + struct gve_rx_alloc_rings_cfg *cfg) { - int err = 0; + struct gve_rx_ring *rx; + int err; int i; - for (i = 0; i < priv->rx_cfg.num_queues; i++) { - err = gve_rx_alloc_ring_dqo(priv, i); + if (!cfg->raw_addressing && !cfg->qpls) { + netif_err(priv, drv, priv->dev, + "Cannot alloc QPL ring before allocing QPLs\n"); + return -EINVAL; + } + + rx = kvcalloc(cfg->qcfg->max_queues, sizeof(struct gve_rx_ring), + GFP_KERNEL); + if (!rx) + return -ENOMEM; + + for (i = 0; i < cfg->qcfg->num_queues; i++) { + err = gve_rx_alloc_ring_dqo(priv, cfg, &rx[i], i); if (err) { netif_err(priv, drv, priv->dev, "Failed to alloc rx ring=%d: err=%d\n", @@ -352,21 +381,30 @@ int gve_rx_alloc_rings_dqo(struct gve_priv *priv) } } + cfg->rx = rx; return 0; err: for (i--; i >= 0; i--) - gve_rx_free_ring_dqo(priv, i); - + gve_rx_free_ring_dqo(priv, &rx[i], cfg); + kvfree(rx); return err; } -void gve_rx_free_rings_dqo(struct gve_priv *priv) +void gve_rx_free_rings_dqo(struct gve_priv *priv, + struct gve_rx_alloc_rings_cfg *cfg) { + struct gve_rx_ring *rx = cfg->rx; int i; - for (i = 0; i < priv->rx_cfg.num_queues; i++) - gve_rx_free_ring_dqo(priv, i); + if (!rx) + return; + + for (i = 0; i < cfg->qcfg->num_queues; i++) + gve_rx_free_ring_dqo(priv, &rx[i], cfg); + + kvfree(rx); + cfg->rx = NULL; } void gve_rx_post_buffers_dqo(struct gve_rx_ring *rx) diff --git a/drivers/net/ethernet/google/gve/gve_tx.c b/drivers/net/ethernet/google/gve/gve_tx.c index 733bf122c5f11..d9b79b4393c48 100644 --- a/drivers/net/ethernet/google/gve/gve_tx.c +++ b/drivers/net/ethernet/google/gve/gve_tx.c @@ -197,29 +197,36 @@ static int gve_clean_xdp_done(struct gve_priv *priv, struct gve_tx_ring *tx, static int gve_clean_tx_done(struct gve_priv *priv, struct gve_tx_ring *tx, u32 to_do, bool try_to_wake); -static void gve_tx_free_ring(struct gve_priv *priv, int idx) +void gve_tx_stop_ring_gqi(struct gve_priv *priv, int idx) { + int ntfy_idx = gve_tx_idx_to_ntfy(priv, idx); struct gve_tx_ring *tx = &priv->tx[idx]; + + if (!gve_tx_was_added_to_block(priv, idx)) + return; + + gve_remove_napi(priv, ntfy_idx); + gve_clean_tx_done(priv, tx, priv->tx_desc_cnt, false); + netdev_tx_reset_queue(tx->netdev_txq); + gve_tx_remove_from_block(priv, idx); +} + +static void gve_tx_free_ring_gqi(struct gve_priv *priv, struct gve_tx_ring *tx, + struct gve_tx_alloc_rings_cfg *cfg) +{ struct device *hdev = &priv->pdev->dev; + int idx = tx->q_num; size_t bytes; u32 slots; - gve_tx_remove_from_block(priv, idx); slots = tx->mask + 1; - if (tx->q_num < priv->tx_cfg.num_queues) { - gve_clean_tx_done(priv, tx, priv->tx_desc_cnt, false); - netdev_tx_reset_queue(tx->netdev_txq); - } else { - gve_clean_xdp_done(priv, tx, priv->tx_desc_cnt); - } - dma_free_coherent(hdev, sizeof(*tx->q_resources), tx->q_resources, tx->q_resources_bus); tx->q_resources = NULL; if (!tx->raw_addressing) { gve_tx_fifo_release(priv, &tx->tx_fifo); - gve_unassign_qpl(priv, tx->tx_fifo.qpl->id); + gve_unassign_qpl(cfg->qpl_cfg, tx->tx_fifo.qpl->id); tx->tx_fifo.qpl = NULL; } @@ -233,11 +240,23 @@ static void gve_tx_free_ring(struct gve_priv *priv, int idx) netif_dbg(priv, drv, priv->dev, "freed tx queue %d\n", idx); } -static int gve_tx_alloc_ring(struct gve_priv *priv, int idx) +void gve_tx_start_ring_gqi(struct gve_priv *priv, int idx) { + int ntfy_idx = gve_tx_idx_to_ntfy(priv, idx); struct gve_tx_ring *tx = &priv->tx[idx]; + + gve_tx_add_to_block(priv, idx); + + tx->netdev_txq = netdev_get_tx_queue(priv->dev, idx); + gve_add_napi(priv, ntfy_idx, gve_napi_poll); +} + +static int gve_tx_alloc_ring_gqi(struct gve_priv *priv, + struct gve_tx_alloc_rings_cfg *cfg, + struct gve_tx_ring *tx, + int idx) +{ struct device *hdev = &priv->pdev->dev; - u32 slots = priv->tx_desc_cnt; size_t bytes; /* Make sure everything is zeroed to start */ @@ -246,23 +265,23 @@ static int gve_tx_alloc_ring(struct gve_priv *priv, int idx) spin_lock_init(&tx->xdp_lock); tx->q_num = idx; - tx->mask = slots - 1; + tx->mask = cfg->ring_size - 1; /* alloc metadata */ - tx->info = vzalloc(sizeof(*tx->info) * slots); + tx->info = vzalloc(sizeof(*tx->info) * cfg->ring_size); if (!tx->info) return -ENOMEM; /* alloc tx queue */ - bytes = sizeof(*tx->desc) * slots; + bytes = sizeof(*tx->desc) * cfg->ring_size; tx->desc = dma_alloc_coherent(hdev, bytes, &tx->bus, GFP_KERNEL); if (!tx->desc) goto abort_with_info; - tx->raw_addressing = priv->queue_format == GVE_GQI_RDA_FORMAT; - tx->dev = &priv->pdev->dev; + tx->raw_addressing = cfg->raw_addressing; + tx->dev = hdev; if (!tx->raw_addressing) { - tx->tx_fifo.qpl = gve_assign_tx_qpl(priv, idx); + tx->tx_fifo.qpl = gve_assign_tx_qpl(cfg, idx); if (!tx->tx_fifo.qpl) goto abort_with_desc; /* map Tx FIFO */ @@ -278,12 +297,6 @@ static int gve_tx_alloc_ring(struct gve_priv *priv, int idx) if (!tx->q_resources) goto abort_with_fifo; - netif_dbg(priv, drv, priv->dev, "tx[%d]->bus=%lx\n", idx, - (unsigned long)tx->bus); - if (idx < priv->tx_cfg.num_queues) - tx->netdev_txq = netdev_get_tx_queue(priv->dev, idx); - gve_tx_add_to_block(priv, idx); - return 0; abort_with_fifo: @@ -291,7 +304,7 @@ static int gve_tx_alloc_ring(struct gve_priv *priv, int idx) gve_tx_fifo_release(priv, &tx->tx_fifo); abort_with_qpl: if (!tx->raw_addressing) - gve_unassign_qpl(priv, tx->tx_fifo.qpl->id); + gve_unassign_qpl(cfg->qpl_cfg, tx->tx_fifo.qpl->id); abort_with_desc: dma_free_coherent(hdev, bytes, tx->desc, tx->bus); tx->desc = NULL; @@ -301,36 +314,73 @@ static int gve_tx_alloc_ring(struct gve_priv *priv, int idx) return -ENOMEM; } -int gve_tx_alloc_rings(struct gve_priv *priv, int start_id, int num_rings) +int gve_tx_alloc_rings_gqi(struct gve_priv *priv, + struct gve_tx_alloc_rings_cfg *cfg) { + struct gve_tx_ring *tx = cfg->tx; int err = 0; - int i; + int i, j; + + if (!cfg->raw_addressing && !cfg->qpls) { + netif_err(priv, drv, priv->dev, + "Cannot alloc QPL ring before allocing QPLs\n"); + return -EINVAL; + } + + if (cfg->start_idx + cfg->num_rings > cfg->qcfg->max_queues) { + netif_err(priv, drv, priv->dev, + "Cannot alloc more than the max num of Tx rings\n"); + return -EINVAL; + } + + if (cfg->start_idx == 0) { + tx = kvcalloc(cfg->qcfg->max_queues, sizeof(struct gve_tx_ring), + GFP_KERNEL); + if (!tx) + return -ENOMEM; + } else if (!tx) { + netif_err(priv, drv, priv->dev, + "Cannot alloc tx rings from a nonzero start idx without tx array\n"); + return -EINVAL; + } - for (i = start_id; i < start_id + num_rings; i++) { - err = gve_tx_alloc_ring(priv, i); + for (i = cfg->start_idx; i < cfg->start_idx + cfg->num_rings; i++) { + err = gve_tx_alloc_ring_gqi(priv, cfg, &tx[i], i); if (err) { netif_err(priv, drv, priv->dev, "Failed to alloc tx ring=%d: err=%d\n", i, err); - break; + goto cleanup; } } - /* Unallocate if there was an error */ - if (err) { - int j; - for (j = start_id; j < i; j++) - gve_tx_free_ring(priv, j); - } + cfg->tx = tx; + return 0; + +cleanup: + for (j = 0; j < i; j++) + gve_tx_free_ring_gqi(priv, &tx[j], cfg); + if (cfg->start_idx == 0) + kvfree(tx); return err; } -void gve_tx_free_rings_gqi(struct gve_priv *priv, int start_id, int num_rings) +void gve_tx_free_rings_gqi(struct gve_priv *priv, + struct gve_tx_alloc_rings_cfg *cfg) { + struct gve_tx_ring *tx = cfg->tx; int i; - for (i = start_id; i < start_id + num_rings; i++) - gve_tx_free_ring(priv, i); + if (!tx) + return; + + for (i = cfg->start_idx; i < cfg->start_idx + cfg->num_rings; i++) + gve_tx_free_ring_gqi(priv, &tx[i], cfg); + + if (cfg->start_idx == 0) { + kvfree(tx); + cfg->tx = NULL; + } } /* gve_tx_avail - Calculates the number of slots available in the ring diff --git a/drivers/net/ethernet/google/gve/gve_tx_dqo.c b/drivers/net/ethernet/google/gve/gve_tx_dqo.c index dee9f04f0453c..7aa1fdc09e776 100644 --- a/drivers/net/ethernet/google/gve/gve_tx_dqo.c +++ b/drivers/net/ethernet/google/gve/gve_tx_dqo.c @@ -187,13 +187,27 @@ static void gve_tx_clean_pending_packets(struct gve_tx_ring *tx) } } -static void gve_tx_free_ring_dqo(struct gve_priv *priv, int idx) +void gve_tx_stop_ring_dqo(struct gve_priv *priv, int idx) { + int ntfy_idx = gve_tx_idx_to_ntfy(priv, idx); struct gve_tx_ring *tx = &priv->tx[idx]; - struct device *hdev = &priv->pdev->dev; - size_t bytes; + if (!gve_tx_was_added_to_block(priv, idx)) + return; + + gve_remove_napi(priv, ntfy_idx); + gve_clean_tx_done_dqo(priv, tx, /*napi=*/NULL); + netdev_tx_reset_queue(tx->netdev_txq); + gve_tx_clean_pending_packets(tx); gve_tx_remove_from_block(priv, idx); +} + +static void gve_tx_free_ring_dqo(struct gve_priv *priv, struct gve_tx_ring *tx, + struct gve_tx_alloc_rings_cfg *cfg) +{ + struct device *hdev = &priv->pdev->dev; + int idx = tx->q_num; + size_t bytes; if (tx->q_resources) { dma_free_coherent(hdev, sizeof(*tx->q_resources), @@ -222,7 +236,7 @@ static void gve_tx_free_ring_dqo(struct gve_priv *priv, int idx) tx->dqo.tx_qpl_buf_next = NULL; if (tx->dqo.qpl) { - gve_unassign_qpl(priv, tx->dqo.qpl->id); + gve_unassign_qpl(cfg->qpl_cfg, tx->dqo.qpl->id); tx->dqo.qpl = NULL; } @@ -252,9 +266,22 @@ static int gve_tx_qpl_buf_init(struct gve_tx_ring *tx) return 0; } -static int gve_tx_alloc_ring_dqo(struct gve_priv *priv, int idx) +void gve_tx_start_ring_dqo(struct gve_priv *priv, int idx) { + int ntfy_idx = gve_tx_idx_to_ntfy(priv, idx); struct gve_tx_ring *tx = &priv->tx[idx]; + + gve_tx_add_to_block(priv, idx); + + tx->netdev_txq = netdev_get_tx_queue(priv->dev, idx); + gve_add_napi(priv, ntfy_idx, gve_napi_poll_dqo); +} + +static int gve_tx_alloc_ring_dqo(struct gve_priv *priv, + struct gve_tx_alloc_rings_cfg *cfg, + struct gve_tx_ring *tx, + int idx) +{ struct device *hdev = &priv->pdev->dev; int num_pending_packets; size_t bytes; @@ -262,15 +289,12 @@ static int gve_tx_alloc_ring_dqo(struct gve_priv *priv, int idx) memset(tx, 0, sizeof(*tx)); tx->q_num = idx; - tx->dev = &priv->pdev->dev; - tx->netdev_txq = netdev_get_tx_queue(priv->dev, idx); + tx->dev = hdev; atomic_set_release(&tx->dqo_compl.hw_tx_head, 0); /* Queue sizes must be a power of 2 */ - tx->mask = priv->tx_desc_cnt - 1; - tx->dqo.complq_mask = priv->queue_format == GVE_DQO_RDA_FORMAT ? - priv->options_dqo_rda.tx_comp_ring_entries - 1 : - tx->mask; + tx->mask = cfg->ring_size - 1; + tx->dqo.complq_mask = tx->mask; /* The max number of pending packets determines the maximum number of * descriptors which maybe written to the completion queue. @@ -326,8 +350,8 @@ static int gve_tx_alloc_ring_dqo(struct gve_priv *priv, int idx) if (!tx->q_resources) goto err; - if (gve_is_qpl(priv)) { - tx->dqo.qpl = gve_assign_tx_qpl(priv, idx); + if (!cfg->raw_addressing) { + tx->dqo.qpl = gve_assign_tx_qpl(cfg, idx); if (!tx->dqo.qpl) goto err; @@ -335,22 +359,45 @@ static int gve_tx_alloc_ring_dqo(struct gve_priv *priv, int idx) goto err; } - gve_tx_add_to_block(priv, idx); - return 0; err: - gve_tx_free_ring_dqo(priv, idx); + gve_tx_free_ring_dqo(priv, tx, cfg); return -ENOMEM; } -int gve_tx_alloc_rings_dqo(struct gve_priv *priv) +int gve_tx_alloc_rings_dqo(struct gve_priv *priv, + struct gve_tx_alloc_rings_cfg *cfg) { + struct gve_tx_ring *tx = cfg->tx; int err = 0; - int i; + int i, j; - for (i = 0; i < priv->tx_cfg.num_queues; i++) { - err = gve_tx_alloc_ring_dqo(priv, i); + if (!cfg->raw_addressing && !cfg->qpls) { + netif_err(priv, drv, priv->dev, + "Cannot alloc QPL ring before allocing QPLs\n"); + return -EINVAL; + } + + if (cfg->start_idx + cfg->num_rings > cfg->qcfg->max_queues) { + netif_err(priv, drv, priv->dev, + "Cannot alloc more than the max num of Tx rings\n"); + return -EINVAL; + } + + if (cfg->start_idx == 0) { + tx = kvcalloc(cfg->qcfg->max_queues, sizeof(struct gve_tx_ring), + GFP_KERNEL); + if (!tx) + return -ENOMEM; + } else if (!tx) { + netif_err(priv, drv, priv->dev, + "Cannot alloc tx rings from a nonzero start idx without tx array\n"); + return -EINVAL; + } + + for (i = cfg->start_idx; i < cfg->start_idx + cfg->num_rings; i++) { + err = gve_tx_alloc_ring_dqo(priv, cfg, &tx[i], i); if (err) { netif_err(priv, drv, priv->dev, "Failed to alloc tx ring=%d: err=%d\n", @@ -359,27 +406,32 @@ int gve_tx_alloc_rings_dqo(struct gve_priv *priv) } } + cfg->tx = tx; return 0; err: - for (i--; i >= 0; i--) - gve_tx_free_ring_dqo(priv, i); - + for (j = 0; j < i; j++) + gve_tx_free_ring_dqo(priv, &tx[j], cfg); + if (cfg->start_idx == 0) + kvfree(tx); return err; } -void gve_tx_free_rings_dqo(struct gve_priv *priv) +void gve_tx_free_rings_dqo(struct gve_priv *priv, + struct gve_tx_alloc_rings_cfg *cfg) { + struct gve_tx_ring *tx = cfg->tx; int i; - for (i = 0; i < priv->tx_cfg.num_queues; i++) { - struct gve_tx_ring *tx = &priv->tx[i]; + if (!tx) + return; - gve_clean_tx_done_dqo(priv, tx, /*napi=*/NULL); - netdev_tx_reset_queue(tx->netdev_txq); - gve_tx_clean_pending_packets(tx); + for (i = cfg->start_idx; i < cfg->start_idx + cfg->num_rings; i++) + gve_tx_free_ring_dqo(priv, &tx[i], cfg); - gve_tx_free_ring_dqo(priv, i); + if (cfg->start_idx == 0) { + kvfree(tx); + cfg->tx = NULL; } } diff --git a/drivers/net/ethernet/google/gve/gve_utils.c b/drivers/net/ethernet/google/gve/gve_utils.c index 26e08d7532702..d682cb4a77b24 100644 --- a/drivers/net/ethernet/google/gve/gve_utils.c +++ b/drivers/net/ethernet/google/gve/gve_utils.c @@ -8,6 +8,14 @@ #include "gve_adminq.h" #include "gve_utils.h" +bool gve_tx_was_added_to_block(struct gve_priv *priv, int queue_idx) +{ + struct gve_notify_block *block = + &priv->ntfy_blocks[gve_tx_idx_to_ntfy(priv, queue_idx)]; + + return block->tx != NULL; +} + void gve_tx_remove_from_block(struct gve_priv *priv, int queue_idx) { struct gve_notify_block *block = @@ -30,6 +38,14 @@ void gve_tx_add_to_block(struct gve_priv *priv, int queue_idx) queue_idx); } +bool gve_rx_was_added_to_block(struct gve_priv *priv, int queue_idx) +{ + struct gve_notify_block *block = + &priv->ntfy_blocks[gve_rx_idx_to_ntfy(priv, queue_idx)]; + + return block->rx != NULL; +} + void gve_rx_remove_from_block(struct gve_priv *priv, int queue_idx) { struct gve_notify_block *block = diff --git a/drivers/net/ethernet/google/gve/gve_utils.h b/drivers/net/ethernet/google/gve/gve_utils.h index 324fd98a61124..45f25f0e9fa0e 100644 --- a/drivers/net/ethernet/google/gve/gve_utils.h +++ b/drivers/net/ethernet/google/gve/gve_utils.h @@ -11,9 +11,11 @@ #include "gve.h" +bool gve_tx_was_added_to_block(struct gve_priv *priv, int queue_idx); void gve_tx_remove_from_block(struct gve_priv *priv, int queue_idx); void gve_tx_add_to_block(struct gve_priv *priv, int queue_idx); +bool gve_rx_was_added_to_block(struct gve_priv *priv, int queue_idx); void gve_rx_remove_from_block(struct gve_priv *priv, int queue_idx); void gve_rx_add_to_block(struct gve_priv *priv, int queue_idx);