diff options
Diffstat (limited to 'drivers/net/ethernet/google/gve/gve_adminq.c')
| -rw-r--r-- | drivers/net/ethernet/google/gve/gve_adminq.c | 139 |
1 files changed, 137 insertions, 2 deletions
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; +} |