diff options
-rw-r--r-- | drivers/net/ethernet/google/gve/gve.h | 43 | ||||
-rw-r--r-- | drivers/net/ethernet/google/gve/gve_adminq.c | 139 | ||||
-rw-r--r-- | drivers/net/ethernet/google/gve/gve_adminq.h | 80 | ||||
-rw-r--r-- | drivers/net/ethernet/google/gve/gve_ethtool.c | 5 | ||||
-rw-r--r-- | drivers/net/ethernet/google/gve/gve_main.c | 51 |
5 files changed, 314 insertions, 4 deletions
diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h index 58213c15e084..b9e9dd958f3c 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -60,6 +60,11 @@ #define GVE_DEFAULT_RX_BUFFER_OFFSET 2048 +#define GVE_FLOW_RULES_CACHE_SIZE \ + (GVE_ADMINQ_BUFFER_SIZE / sizeof(struct gve_adminq_queried_flow_rule)) +#define GVE_FLOW_RULE_IDS_CACHE_SIZE \ + (GVE_ADMINQ_BUFFER_SIZE / sizeof(((struct gve_adminq_queried_flow_rule *)0)->location)) + #define GVE_XDP_ACTIONS 5 #define GVE_GQ_TX_MIN_PKT_DESC_BYTES 182 @@ -678,6 +683,39 @@ enum gve_queue_format { GVE_DQO_QPL_FORMAT = 0x4, }; +struct gve_flow_spec { + __be32 src_ip[4]; + __be32 dst_ip[4]; + union { + struct { + __be16 src_port; + __be16 dst_port; + }; + __be32 spi; + }; + union { + u8 tos; + u8 tclass; + }; +}; + +struct gve_flow_rule { + u32 location; + u16 flow_type; + u16 action; + struct gve_flow_spec key; + struct gve_flow_spec mask; +}; + +struct gve_flow_rules_cache { + bool rules_cache_synced; /* False if the driver's rules_cache is outdated */ + struct gve_adminq_queried_flow_rule *rules_cache; + __be32 *rule_ids_cache; + /* The total number of queried rules that stored in the caches */ + u32 rules_cache_num; + u32 rule_ids_cache_num; +}; + struct gve_priv { struct net_device *dev; struct gve_tx_ring *tx; /* array of tx_cfg.num_queues */ @@ -744,6 +782,8 @@ struct gve_priv { u32 adminq_report_link_speed_cnt; u32 adminq_get_ptype_map_cnt; u32 adminq_verify_driver_compatibility_cnt; + u32 adminq_query_flow_rules_cnt; + u32 adminq_cfg_flow_rule_cnt; /* Global stats */ u32 interface_up_cnt; /* count of times interface turned up since last reset */ @@ -788,6 +828,9 @@ struct gve_priv { bool header_split_enabled; /* True if the header split is enabled by the user */ u32 max_flow_rules; + u32 num_flow_rules; + + struct gve_flow_rules_cache flow_rules_cache; }; enum gve_service_task_flags_bit { diff --git a/drivers/net/ethernet/google/gve/gve_adminq.c b/drivers/net/ethernet/google/gve/gve_adminq.c index 088f543f0ba8..c5bbc1b7524e 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.c +++ b/drivers/net/ethernet/google/gve/gve_adminq.c @@ -287,6 +287,8 @@ int gve_adminq_alloc(struct device *dev, struct gve_priv *priv) priv->adminq_report_stats_cnt = 0; priv->adminq_report_link_speed_cnt = 0; priv->adminq_get_ptype_map_cnt = 0; + priv->adminq_query_flow_rules_cnt = 0; + priv->adminq_cfg_flow_rule_cnt = 0; /* Setup Admin queue with the device */ if (priv->pdev->revision < 0x1) { @@ -526,6 +528,12 @@ static int gve_adminq_issue_cmd(struct gve_priv *priv, case GVE_ADMINQ_VERIFY_DRIVER_COMPATIBILITY: priv->adminq_verify_driver_compatibility_cnt++; break; + case GVE_ADMINQ_QUERY_FLOW_RULES: + priv->adminq_query_flow_rules_cnt++; + break; + case GVE_ADMINQ_CONFIGURE_FLOW_RULE: + priv->adminq_cfg_flow_rule_cnt++; + break; default: dev_err(&priv->pdev->dev, "unknown AQ command opcode %d\n", opcode); } @@ -558,8 +566,8 @@ out: return err; } -static int __maybe_unused gve_adminq_execute_extended_cmd(struct gve_priv *priv, u32 opcode, - size_t cmd_size, void *cmd_orig) +static int gve_adminq_execute_extended_cmd(struct gve_priv *priv, u32 opcode, + size_t cmd_size, void *cmd_orig) { union gve_adminq_command cmd; dma_addr_t inner_cmd_bus; @@ -1190,3 +1198,130 @@ err: ptype_map_bus); return err; } + +static int +gve_adminq_configure_flow_rule(struct gve_priv *priv, + struct gve_adminq_configure_flow_rule *flow_rule_cmd) +{ + int err = gve_adminq_execute_extended_cmd(priv, + GVE_ADMINQ_CONFIGURE_FLOW_RULE, + sizeof(struct gve_adminq_configure_flow_rule), + flow_rule_cmd); + + if (err) { + dev_err(&priv->pdev->dev, "Timeout to configure the flow rule, trigger reset"); + gve_reset(priv, true); + } else { + priv->flow_rules_cache.rules_cache_synced = false; + } + + return err; +} + +int gve_adminq_add_flow_rule(struct gve_priv *priv, struct gve_adminq_flow_rule *rule, u32 loc) +{ + struct gve_adminq_configure_flow_rule flow_rule_cmd = { + .opcode = cpu_to_be16(GVE_FLOW_RULE_CFG_ADD), + .location = cpu_to_be32(loc), + .rule = *rule, + }; + + return gve_adminq_configure_flow_rule(priv, &flow_rule_cmd); +} + +int gve_adminq_del_flow_rule(struct gve_priv *priv, u32 loc) +{ + struct gve_adminq_configure_flow_rule flow_rule_cmd = { + .opcode = cpu_to_be16(GVE_FLOW_RULE_CFG_DEL), + .location = cpu_to_be32(loc), + }; + + return gve_adminq_configure_flow_rule(priv, &flow_rule_cmd); +} + +int gve_adminq_reset_flow_rules(struct gve_priv *priv) +{ + struct gve_adminq_configure_flow_rule flow_rule_cmd = { + .opcode = cpu_to_be16(GVE_FLOW_RULE_CFG_RESET), + }; + + return gve_adminq_configure_flow_rule(priv, &flow_rule_cmd); +} + +/* In the dma memory that the driver allocated for the device to query the flow rules, the device + * will first write it with a struct of gve_query_flow_rules_descriptor. Next to it, the device + * will write an array of rules or rule ids with the count that specified in the descriptor. + * For GVE_FLOW_RULE_QUERY_STATS, the device will only write the descriptor. + */ +static int gve_adminq_process_flow_rules_query(struct gve_priv *priv, u16 query_opcode, + struct gve_query_flow_rules_descriptor *descriptor) +{ + struct gve_flow_rules_cache *flow_rules_cache = &priv->flow_rules_cache; + u32 num_queried_rules, total_memory_len, rule_info_len; + void *rule_info; + + total_memory_len = be32_to_cpu(descriptor->total_length); + num_queried_rules = be32_to_cpu(descriptor->num_queried_rules); + rule_info = (void *)(descriptor + 1); + + switch (query_opcode) { + case GVE_FLOW_RULE_QUERY_RULES: + rule_info_len = num_queried_rules * sizeof(*flow_rules_cache->rules_cache); + if (sizeof(*descriptor) + rule_info_len != total_memory_len) { + dev_err(&priv->dev->dev, "flow rules query is out of memory.\n"); + return -ENOMEM; + } + + memcpy(flow_rules_cache->rules_cache, rule_info, rule_info_len); + flow_rules_cache->rules_cache_num = num_queried_rules; + break; + case GVE_FLOW_RULE_QUERY_IDS: + rule_info_len = num_queried_rules * sizeof(*flow_rules_cache->rule_ids_cache); + if (sizeof(*descriptor) + rule_info_len != total_memory_len) { + dev_err(&priv->dev->dev, "flow rule ids query is out of memory.\n"); + return -ENOMEM; + } + + memcpy(flow_rules_cache->rule_ids_cache, rule_info, rule_info_len); + flow_rules_cache->rule_ids_cache_num = num_queried_rules; + break; + case GVE_FLOW_RULE_QUERY_STATS: + priv->num_flow_rules = be32_to_cpu(descriptor->num_flow_rules); + priv->max_flow_rules = be32_to_cpu(descriptor->max_flow_rules); + return 0; + default: + return -EINVAL; + } + + return 0; +} + +int gve_adminq_query_flow_rules(struct gve_priv *priv, u16 query_opcode, u32 starting_loc) +{ + struct gve_query_flow_rules_descriptor *descriptor; + union gve_adminq_command cmd; + dma_addr_t descriptor_bus; + int err = 0; + + memset(&cmd, 0, sizeof(cmd)); + descriptor = dma_pool_alloc(priv->adminq_pool, GFP_KERNEL, &descriptor_bus); + if (!descriptor) + return -ENOMEM; + + cmd.opcode = cpu_to_be32(GVE_ADMINQ_QUERY_FLOW_RULES); + cmd.query_flow_rules = (struct gve_adminq_query_flow_rules) { + .opcode = cpu_to_be16(query_opcode), + .starting_rule_id = cpu_to_be32(starting_loc), + .available_length = cpu_to_be64(GVE_ADMINQ_BUFFER_SIZE), + .rule_descriptor_addr = cpu_to_be64(descriptor_bus), + }; + err = gve_adminq_execute_cmd(priv, &cmd); + if (err) + goto out; + + err = gve_adminq_process_flow_rules_query(priv, query_opcode, descriptor); + +out: + dma_pool_free(priv->adminq_pool, descriptor, descriptor_bus); + return err; +} diff --git a/drivers/net/ethernet/google/gve/gve_adminq.h b/drivers/net/ethernet/google/gve/gve_adminq.h index e64a0e72e781..ed1370c9b197 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.h +++ b/drivers/net/ethernet/google/gve/gve_adminq.h @@ -25,11 +25,21 @@ enum gve_adminq_opcodes { GVE_ADMINQ_REPORT_LINK_SPEED = 0xD, GVE_ADMINQ_GET_PTYPE_MAP = 0xE, GVE_ADMINQ_VERIFY_DRIVER_COMPATIBILITY = 0xF, + GVE_ADMINQ_QUERY_FLOW_RULES = 0x10, /* For commands that are larger than 56 bytes */ GVE_ADMINQ_EXTENDED_COMMAND = 0xFF, }; +/* The normal adminq command is restricted to be 56 bytes at maximum. For the + * longer adminq command, it is wrapped by GVE_ADMINQ_EXTENDED_COMMAND with + * inner opcode of gve_adminq_extended_cmd_opcodes specified. The inner command + * is written in the dma memory allocated by GVE_ADMINQ_EXTENDED_COMMAND. + */ +enum gve_adminq_extended_cmd_opcodes { + GVE_ADMINQ_CONFIGURE_FLOW_RULE = 0x101, +}; + /* Admin queue status codes */ enum gve_adminq_statuses { GVE_ADMINQ_COMMAND_UNSET = 0x0, @@ -434,6 +444,71 @@ struct gve_adminq_get_ptype_map { __be64 ptype_map_addr; }; +/* Flow-steering related definitions */ +enum gve_adminq_flow_rule_cfg_opcode { + GVE_FLOW_RULE_CFG_ADD = 0, + GVE_FLOW_RULE_CFG_DEL = 1, + GVE_FLOW_RULE_CFG_RESET = 2, +}; + +enum gve_adminq_flow_rule_query_opcode { + GVE_FLOW_RULE_QUERY_RULES = 0, + GVE_FLOW_RULE_QUERY_IDS = 1, + GVE_FLOW_RULE_QUERY_STATS = 2, +}; + +enum gve_adminq_flow_type { + GVE_FLOW_TYPE_TCPV4, + GVE_FLOW_TYPE_UDPV4, + GVE_FLOW_TYPE_SCTPV4, + GVE_FLOW_TYPE_AHV4, + GVE_FLOW_TYPE_ESPV4, + GVE_FLOW_TYPE_TCPV6, + GVE_FLOW_TYPE_UDPV6, + GVE_FLOW_TYPE_SCTPV6, + GVE_FLOW_TYPE_AHV6, + GVE_FLOW_TYPE_ESPV6, +}; + +/* Flow-steering command */ +struct gve_adminq_flow_rule { + __be16 flow_type; + __be16 action; /* RX queue id */ + struct gve_flow_spec key; + struct gve_flow_spec mask; +}; + +struct gve_adminq_configure_flow_rule { + __be16 opcode; + u8 padding[2]; + struct gve_adminq_flow_rule rule; + __be32 location; +}; + +static_assert(sizeof(struct gve_adminq_configure_flow_rule) == 92); + +struct gve_query_flow_rules_descriptor { + __be32 num_flow_rules; + __be32 max_flow_rules; + __be32 num_queried_rules; + __be32 total_length; +}; + +struct gve_adminq_queried_flow_rule { + __be32 location; + struct gve_adminq_flow_rule flow_rule; +}; + +struct gve_adminq_query_flow_rules { + __be16 opcode; + u8 padding[2]; + __be32 starting_rule_id; + __be64 available_length; /* The dma memory length that the driver allocated */ + __be64 rule_descriptor_addr; /* The dma memory address */ +}; + +static_assert(sizeof(struct gve_adminq_query_flow_rules) == 24); + union gve_adminq_command { struct { __be32 opcode; @@ -454,6 +529,7 @@ union gve_adminq_command { struct gve_adminq_get_ptype_map get_ptype_map; struct gve_adminq_verify_driver_compatibility verify_driver_compatibility; + struct gve_adminq_query_flow_rules query_flow_rules; struct gve_adminq_extended_command extended_command; }; }; @@ -488,6 +564,10 @@ int gve_adminq_verify_driver_compatibility(struct gve_priv *priv, u64 driver_info_len, dma_addr_t driver_info_addr); int gve_adminq_report_link_speed(struct gve_priv *priv); +int gve_adminq_add_flow_rule(struct gve_priv *priv, struct gve_adminq_flow_rule *rule, u32 loc); +int gve_adminq_del_flow_rule(struct gve_priv *priv, u32 loc); +int gve_adminq_reset_flow_rules(struct gve_priv *priv); +int gve_adminq_query_flow_rules(struct gve_priv *priv, u16 query_opcode, u32 starting_loc); struct gve_ptype_lut; int gve_adminq_get_ptype_map_dqo(struct gve_priv *priv, diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c index fe1741d482b4..ffaa878d67bc 100644 --- a/drivers/net/ethernet/google/gve/gve_ethtool.c +++ b/drivers/net/ethernet/google/gve/gve_ethtool.c @@ -74,7 +74,8 @@ static const char gve_gstrings_adminq_stats[][ETH_GSTRING_LEN] = { "adminq_create_tx_queue_cnt", "adminq_create_rx_queue_cnt", "adminq_destroy_tx_queue_cnt", "adminq_destroy_rx_queue_cnt", "adminq_dcfg_device_resources_cnt", "adminq_set_driver_parameter_cnt", - "adminq_report_stats_cnt", "adminq_report_link_speed_cnt", "adminq_get_ptype_map_cnt" + "adminq_report_stats_cnt", "adminq_report_link_speed_cnt", "adminq_get_ptype_map_cnt", + "adminq_query_flow_rules", "adminq_cfg_flow_rule", }; static const char gve_gstrings_priv_flags[][ETH_GSTRING_LEN] = { @@ -450,6 +451,8 @@ gve_get_ethtool_stats(struct net_device *netdev, data[i++] = priv->adminq_report_stats_cnt; data[i++] = priv->adminq_report_link_speed_cnt; data[i++] = priv->adminq_get_ptype_map_cnt; + data[i++] = priv->adminq_query_flow_rules_cnt; + data[i++] = priv->adminq_cfg_flow_rule_cnt; } static void gve_get_channels(struct net_device *netdev, diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c index cabf7d4bcecb..fc142856e189 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -141,6 +141,49 @@ static void gve_get_stats(struct net_device *dev, struct rtnl_link_stats64 *s) } } +static int gve_alloc_flow_rule_caches(struct gve_priv *priv) +{ + struct gve_flow_rules_cache *flow_rules_cache = &priv->flow_rules_cache; + int err = 0; + + if (!priv->max_flow_rules) + return 0; + + flow_rules_cache->rules_cache = + kvcalloc(GVE_FLOW_RULES_CACHE_SIZE, sizeof(*flow_rules_cache->rules_cache), + GFP_KERNEL); + if (!flow_rules_cache->rules_cache) { + dev_err(&priv->pdev->dev, "Cannot alloc flow rules cache\n"); + return -ENOMEM; + } + + flow_rules_cache->rule_ids_cache = + kvcalloc(GVE_FLOW_RULE_IDS_CACHE_SIZE, sizeof(*flow_rules_cache->rule_ids_cache), + GFP_KERNEL); + if (!flow_rules_cache->rule_ids_cache) { + dev_err(&priv->pdev->dev, "Cannot alloc flow rule ids cache\n"); + err = -ENOMEM; + goto free_rules_cache; + } + + return 0; + +free_rules_cache: + kvfree(flow_rules_cache->rules_cache); + flow_rules_cache->rules_cache = NULL; + return err; +} + +static void gve_free_flow_rule_caches(struct gve_priv *priv) +{ + struct gve_flow_rules_cache *flow_rules_cache = &priv->flow_rules_cache; + + kvfree(flow_rules_cache->rule_ids_cache); + flow_rules_cache->rule_ids_cache = NULL; + kvfree(flow_rules_cache->rules_cache); + flow_rules_cache->rules_cache = NULL; +} + static int gve_alloc_counter_array(struct gve_priv *priv) { priv->counter_array = @@ -521,9 +564,12 @@ static int gve_setup_device_resources(struct gve_priv *priv) { int err; - err = gve_alloc_counter_array(priv); + err = gve_alloc_flow_rule_caches(priv); if (err) return err; + err = gve_alloc_counter_array(priv); + if (err) + goto abort_with_flow_rule_caches; err = gve_alloc_notify_blocks(priv); if (err) goto abort_with_counter; @@ -575,6 +621,8 @@ abort_with_ntfy_blocks: gve_free_notify_blocks(priv); abort_with_counter: gve_free_counter_array(priv); +abort_with_flow_rule_caches: + gve_free_flow_rule_caches(priv); return err; } @@ -606,6 +654,7 @@ static void gve_teardown_device_resources(struct gve_priv *priv) kvfree(priv->ptype_lut_dqo); priv->ptype_lut_dqo = NULL; + gve_free_flow_rule_caches(priv); gve_free_counter_array(priv); gve_free_notify_blocks(priv); gve_free_stats_report(priv); |