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From: David Awogbemila To: netdev@vger.kernel.org Cc: Kuo Zhao , Yangchun Fu , David Awogbemila Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Kuo Zhao Sample output of "ethtool -S " with 1 RX queue and 1 TX queue: NIC statistics: rx_packets: 1039 tx_packets: 37 rx_bytes: 822071 tx_bytes: 4100 rx_dropped: 0 tx_dropped: 0 tx_timeouts: 0 rx_skb_alloc_fail: 0 rx_buf_alloc_fail: 0 rx_desc_err_dropped_pkt: 0 interface_up_cnt: 1 interface_down_cnt: 0 reset_cnt: 0 page_alloc_fail: 0 dma_mapping_error: 0 rx_posted_desc[0]: 1365 rx_completed_desc[0]: 341 rx_bytes[0]: 215094 rx_dropped_pkt[0]: 0 rx_copybreak_pkt[0]: 3 rx_copied_pkt[0]: 3 tx_posted_desc[0]: 6 tx_completed_desc[0]: 6 tx_bytes[0]: 420 tx_wake[0]: 0 tx_stop[0]: 0 tx_event_counter[0]: 6 adminq_prod_cnt: 34 adminq_cmd_fail: 0 adminq_timeouts: 0 adminq_describe_device_cnt: 1 adminq_cfg_device_resources_cnt: 1 adminq_register_page_list_cnt: 16 adminq_unregister_page_list_cnt: 0 adminq_create_tx_queue_cnt: 8 adminq_create_rx_queue_cnt: 8 adminq_destroy_tx_queue_cnt: 0 adminq_destroy_rx_queue_cnt: 0 adminq_dcfg_device_resources_cnt: 0 adminq_set_driver_parameter_cnt: 0 Reviewed-by: Yangchun Fu Signed-off-by: Kuo Zhao Signed-off-by: David Awogbemila --- drivers/net/ethernet/google/gve/gve.h | 28 +++- drivers/net/ethernet/google/gve/gve_adminq.c | 65 +++++++- drivers/net/ethernet/google/gve/gve_ethtool.c | 148 ++++++++++++++---- drivers/net/ethernet/google/gve/gve_main.c | 15 +- drivers/net/ethernet/google/gve/gve_rx.c | 37 ++++- 5 files changed, 245 insertions(+), 48 deletions(-) diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h index ebc37e256922..55b34b437764 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -71,6 +71,11 @@ struct gve_rx_ring { u32 cnt; /* free-running total number of completed packets */ u32 fill_cnt; /* free-running total number of descs and buffs posted */ u32 mask; /* masks the cnt and fill_cnt to the size of the ring */ + u64 rx_copybreak_pkt; /* free-running count of copybreak packets */ + u64 rx_copied_pkt; /* free-running total number of copied packets */ + u64 rx_skb_alloc_fail; /* free-running count of skb alloc fails */ + u64 rx_buf_alloc_fail; /* free-running count of buffer alloc fails */ + u64 rx_desc_err_dropped_pkt; /* free-running count of packets dropped by descriptor error */ u32 q_num; /* queue index */ u32 ntfy_id; /* notification block index */ struct gve_queue_resources *q_resources; /* head and tail pointer idx */ @@ -202,6 +207,26 @@ struct gve_priv { dma_addr_t adminq_bus_addr; u32 adminq_mask; /* masks prod_cnt to adminq size */ u32 adminq_prod_cnt; /* free-running count of AQ cmds executed */ + u32 adminq_cmd_fail; /* free-running count of AQ cmds failed */ + u32 adminq_timeouts; /* free-running count of AQ cmds timeouts */ + /* free-running count of per AQ cmd executed */ + u32 adminq_describe_device_cnt; + u32 adminq_cfg_device_resources_cnt; + u32 adminq_register_page_list_cnt; + u32 adminq_unregister_page_list_cnt; + u32 adminq_create_tx_queue_cnt; + u32 adminq_create_rx_queue_cnt; + u32 adminq_destroy_tx_queue_cnt; + u32 adminq_destroy_rx_queue_cnt; + u32 adminq_dcfg_device_resources_cnt; + u32 adminq_set_driver_parameter_cnt; + + /* Global stats */ + u32 interface_up_cnt; /* count of times interface turned up since last reset */ + u32 interface_down_cnt; /* count of times interface turned down since last reset */ + u32 reset_cnt; /* count of reset */ + u32 page_alloc_fail; /* count of page alloc fails */ + u32 dma_mapping_error; /* count of dma mapping errors */ struct workqueue_struct *gve_wq; struct work_struct service_task; @@ -426,7 +451,8 @@ static inline bool gve_can_recycle_pages(struct net_device *dev) } /* buffers */ -int gve_alloc_page(struct device *dev, struct page **page, dma_addr_t *dma, +int gve_alloc_page(struct gve_priv *priv, struct device *dev, + struct page **page, dma_addr_t *dma, enum dma_data_direction); void gve_free_page(struct device *dev, struct page *page, dma_addr_t dma, enum dma_data_direction); diff --git a/drivers/net/ethernet/google/gve/gve_adminq.c b/drivers/net/ethernet/google/gve/gve_adminq.c index c3ba7baf0107..529de756ff9b 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.c +++ b/drivers/net/ethernet/google/gve/gve_adminq.c @@ -23,6 +23,18 @@ int gve_adminq_alloc(struct device *dev, struct gve_priv *priv) priv->adminq_mask = (PAGE_SIZE / sizeof(union gve_adminq_command)) - 1; priv->adminq_prod_cnt = 0; + priv->adminq_cmd_fail = 0; + priv->adminq_timeouts = 0; + priv->adminq_describe_device_cnt = 0; + priv->adminq_cfg_device_resources_cnt = 0; + priv->adminq_register_page_list_cnt = 0; + priv->adminq_unregister_page_list_cnt = 0; + priv->adminq_create_tx_queue_cnt = 0; + priv->adminq_create_rx_queue_cnt = 0; + priv->adminq_destroy_tx_queue_cnt = 0; + priv->adminq_destroy_rx_queue_cnt = 0; + priv->adminq_dcfg_device_resources_cnt = 0; + priv->adminq_set_driver_parameter_cnt = 0; /* Setup Admin queue with the device */ iowrite32be(priv->adminq_bus_addr / PAGE_SIZE, @@ -81,17 +93,18 @@ static bool gve_adminq_wait_for_cmd(struct gve_priv *priv, u32 prod_cnt) return false; } -static int gve_adminq_parse_err(struct device *dev, u32 status) +static int gve_adminq_parse_err(struct gve_priv *priv, u32 status) { if (status != GVE_ADMINQ_COMMAND_PASSED && - status != GVE_ADMINQ_COMMAND_UNSET) - dev_err(dev, "AQ command failed with status %d\n", status); - + status != GVE_ADMINQ_COMMAND_UNSET) { + dev_err(&priv->pdev->dev, "AQ command failed with status %d\n", status); + priv->adminq_cmd_fail++; + } switch (status) { case GVE_ADMINQ_COMMAND_PASSED: return 0; case GVE_ADMINQ_COMMAND_UNSET: - dev_err(dev, "parse_aq_err: err and status both unset, this should not be possible.\n"); + dev_err(&priv->pdev->dev, "parse_aq_err: err and status both unset, this should not be possible.\n"); return -EINVAL; case GVE_ADMINQ_COMMAND_ERROR_ABORTED: case GVE_ADMINQ_COMMAND_ERROR_CANCELLED: @@ -116,7 +129,7 @@ static int gve_adminq_parse_err(struct device *dev, u32 status) case GVE_ADMINQ_COMMAND_ERROR_UNIMPLEMENTED: return -ENOTSUPP; default: - dev_err(dev, "parse_aq_err: unknown status code %d\n", status); + dev_err(&priv->pdev->dev, "parse_aq_err: unknown status code %d\n", status); return -EINVAL; } } @@ -130,22 +143,60 @@ int gve_adminq_execute_cmd(struct gve_priv *priv, union gve_adminq_command *cmd; u32 status = 0; u32 prod_cnt; + u32 opcode; cmd = &priv->adminq[priv->adminq_prod_cnt & priv->adminq_mask]; priv->adminq_prod_cnt++; prod_cnt = priv->adminq_prod_cnt; memcpy(cmd, cmd_orig, sizeof(*cmd_orig)); + opcode = be32_to_cpu(READ_ONCE(cmd->opcode)); + + switch (opcode) { + case GVE_ADMINQ_DESCRIBE_DEVICE: + priv->adminq_describe_device_cnt++; + break; + case GVE_ADMINQ_CONFIGURE_DEVICE_RESOURCES: + priv->adminq_cfg_device_resources_cnt++; + break; + case GVE_ADMINQ_REGISTER_PAGE_LIST: + priv->adminq_register_page_list_cnt++; + break; + case GVE_ADMINQ_UNREGISTER_PAGE_LIST: + priv->adminq_unregister_page_list_cnt++; + break; + case GVE_ADMINQ_CREATE_TX_QUEUE: + priv->adminq_create_tx_queue_cnt++; + break; + case GVE_ADMINQ_CREATE_RX_QUEUE: + priv->adminq_create_rx_queue_cnt++; + break; + case GVE_ADMINQ_DESTROY_TX_QUEUE: + priv->adminq_destroy_tx_queue_cnt++; + break; + case GVE_ADMINQ_DESTROY_RX_QUEUE: + priv->adminq_destroy_rx_queue_cnt++; + break; + case GVE_ADMINQ_DECONFIGURE_DEVICE_RESOURCES: + priv->adminq_dcfg_device_resources_cnt++; + break; + case GVE_ADMINQ_SET_DRIVER_PARAMETER: + priv->adminq_set_driver_parameter_cnt++; + break; + default: + dev_err(&priv->pdev->dev, "unknown AQ command opcode %d\n", opcode); + } gve_adminq_kick_cmd(priv, prod_cnt); if (!gve_adminq_wait_for_cmd(priv, prod_cnt)) { dev_err(&priv->pdev->dev, "AQ command timed out, need to reset AQ\n"); + priv->adminq_timeouts++; return -ENOTRECOVERABLE; } memcpy(cmd_orig, cmd, sizeof(*cmd)); status = be32_to_cpu(READ_ONCE(cmd->status)); - return gve_adminq_parse_err(&priv->pdev->dev, status); + return gve_adminq_parse_err(priv, status); } /* The device specifies that the management vector can either be the first irq diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c index 1a80d38e66ec..e9bef1ff7ec3 100644 --- a/drivers/net/ethernet/google/gve/gve_ethtool.c +++ b/drivers/net/ethernet/google/gve/gve_ethtool.c @@ -34,17 +34,40 @@ static u32 gve_get_msglevel(struct net_device *netdev) static const char gve_gstrings_main_stats[][ETH_GSTRING_LEN] = { "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_dropped", "tx_dropped", "tx_timeouts", + "rx_skb_alloc_fail", "rx_buf_alloc_fail", "rx_desc_err_dropped_pkt", + "interface_up_cnt", "interface_down_cnt", "reset_cnt", + "page_alloc_fail", "dma_mapping_error", +}; + +static const char gve_gstrings_rx_stats[][ETH_GSTRING_LEN] = { + "rx_posted_desc[%u]", "rx_completed_desc[%u]", "rx_bytes[%u]", + "rx_dropped_pkt[%u]", "rx_copybreak_pkt[%u]", "rx_copied_pkt[%u]", +}; + +static const char gve_gstrings_tx_stats[][ETH_GSTRING_LEN] = { + "tx_posted_desc[%u]", "tx_completed_desc[%u]", "tx_bytes[%u]", + "tx_wake[%u]", "tx_stop[%u]", "tx_event_counter[%u]", +}; + +static const char gve_gstrings_adminq_stats[][ETH_GSTRING_LEN] = { + "adminq_prod_cnt", "adminq_cmd_fail", "adminq_timeouts", + "adminq_describe_device_cnt", "adminq_cfg_device_resources_cnt", + "adminq_register_page_list_cnt", "adminq_unregister_page_list_cnt", + "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", }; #define GVE_MAIN_STATS_LEN ARRAY_SIZE(gve_gstrings_main_stats) -#define NUM_GVE_TX_CNTS 5 -#define NUM_GVE_RX_CNTS 2 +#define GVE_ADMINQ_STATS_LEN ARRAY_SIZE(gve_gstrings_adminq_stats) +#define NUM_GVE_TX_CNTS ARRAY_SIZE(gve_gstrings_tx_stats) +#define NUM_GVE_RX_CNTS ARRAY_SIZE(gve_gstrings_rx_stats) static void gve_get_strings(struct net_device *netdev, u32 stringset, u8 *data) { struct gve_priv *priv = netdev_priv(netdev); char *s = (char *)data; - int i; + int i, j; if (stringset != ETH_SS_STATS) return; @@ -53,23 +76,21 @@ static void gve_get_strings(struct net_device *netdev, u32 stringset, u8 *data) sizeof(gve_gstrings_main_stats)); s += sizeof(gve_gstrings_main_stats); for (i = 0; i < priv->rx_cfg.num_queues; i++) { - snprintf(s, ETH_GSTRING_LEN, "rx_desc_cnt[%u]", i); - s += ETH_GSTRING_LEN; - snprintf(s, ETH_GSTRING_LEN, "rx_desc_fill_cnt[%u]", i); - s += ETH_GSTRING_LEN; + for (j = 0; j < NUM_GVE_RX_CNTS; j++) { + snprintf(s, ETH_GSTRING_LEN, gve_gstrings_rx_stats[j], i); + s += ETH_GSTRING_LEN; + } } for (i = 0; i < priv->tx_cfg.num_queues; i++) { - snprintf(s, ETH_GSTRING_LEN, "tx_req[%u]", i); - s += ETH_GSTRING_LEN; - snprintf(s, ETH_GSTRING_LEN, "tx_done[%u]", i); - s += ETH_GSTRING_LEN; - snprintf(s, ETH_GSTRING_LEN, "tx_wake[%u]", i); - s += ETH_GSTRING_LEN; - snprintf(s, ETH_GSTRING_LEN, "tx_stop[%u]", i); - s += ETH_GSTRING_LEN; - snprintf(s, ETH_GSTRING_LEN, "tx_event_counter[%u]", i); - s += ETH_GSTRING_LEN; + for (j = 0; j < NUM_GVE_TX_CNTS; j++) { + snprintf(s, ETH_GSTRING_LEN, gve_gstrings_tx_stats[j], i); + s += ETH_GSTRING_LEN; + } } + + memcpy(s, *gve_gstrings_adminq_stats, + sizeof(gve_gstrings_adminq_stats)); + s += sizeof(gve_gstrings_adminq_stats); } static int gve_get_sset_count(struct net_device *netdev, int sset) @@ -78,7 +99,7 @@ static int gve_get_sset_count(struct net_device *netdev, int sset) switch (sset) { case ETH_SS_STATS: - return GVE_MAIN_STATS_LEN + + return GVE_MAIN_STATS_LEN + GVE_ADMINQ_STATS_LEN + (priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS) + (priv->tx_cfg.num_queues * NUM_GVE_TX_CNTS); default: @@ -90,24 +111,40 @@ static void gve_get_ethtool_stats(struct net_device *netdev, struct ethtool_stats *stats, u64 *data) { - struct gve_priv *priv = netdev_priv(netdev); - u64 rx_pkts, rx_bytes, tx_pkts, tx_bytes; + u64 tmp_rx_pkts, tmp_rx_bytes, tmp_rx_skb_alloc_fail, tmp_rx_buf_alloc_fail, + tmp_rx_desc_err_dropped_pkt, tmp_tx_pkts, tmp_tx_bytes; + u64 rx_buf_alloc_fail, rx_desc_err_dropped_pkt, rx_pkts, + rx_skb_alloc_fail, rx_bytes, tx_pkts, tx_bytes; + struct gve_priv *priv; unsigned int start; int ring; int i; ASSERT_RTNL(); - for (rx_pkts = 0, rx_bytes = 0, ring = 0; + priv = netdev_priv(netdev); + for (rx_pkts = 0, rx_bytes = 0, rx_skb_alloc_fail = 0, + rx_buf_alloc_fail = 0, rx_desc_err_dropped_pkt = 0, ring = 0; ring < priv->rx_cfg.num_queues; ring++) { if (priv->rx) { do { + struct gve_rx_ring *rx = &priv->rx[ring]; + start = u64_stats_fetch_begin(&priv->rx[ring].statss); - rx_pkts += priv->rx[ring].rpackets; - rx_bytes += priv->rx[ring].rbytes; + tmp_rx_pkts = rx->rpackets; + tmp_rx_bytes = rx->rbytes; + tmp_rx_skb_alloc_fail = rx->rx_skb_alloc_fail; + tmp_rx_buf_alloc_fail = rx->rx_buf_alloc_fail; + tmp_rx_desc_err_dropped_pkt = + rx->rx_desc_err_dropped_pkt; } while (u64_stats_fetch_retry(&priv->rx[ring].statss, start)); + rx_pkts += tmp_rx_pkts; + rx_bytes += tmp_rx_bytes; + rx_skb_alloc_fail += tmp_rx_skb_alloc_fail; + rx_buf_alloc_fail += tmp_rx_buf_alloc_fail; + rx_desc_err_dropped_pkt += tmp_rx_desc_err_dropped_pkt; } } for (tx_pkts = 0, tx_bytes = 0, ring = 0; @@ -116,10 +153,12 @@ gve_get_ethtool_stats(struct net_device *netdev, do { start = u64_stats_fetch_begin(&priv->tx[ring].statss); - tx_pkts += priv->tx[ring].pkt_done; - tx_bytes += priv->tx[ring].bytes_done; + tmp_tx_pkts = priv->tx[ring].pkt_done; + tmp_tx_bytes = priv->tx[ring].bytes_done; } while (u64_stats_fetch_retry(&priv->tx[ring].statss, start)); + tx_pkts += tmp_tx_pkts; + tx_bytes += tmp_tx_bytes; } } @@ -128,9 +167,21 @@ gve_get_ethtool_stats(struct net_device *netdev, data[i++] = tx_pkts; data[i++] = rx_bytes; data[i++] = tx_bytes; - /* Skip rx_dropped and tx_dropped */ - i += 2; + /* total rx dropped packets */ + data[i++] = rx_skb_alloc_fail + rx_buf_alloc_fail + + rx_desc_err_dropped_pkt; + /* Skip tx_dropped */ + i++; + data[i++] = priv->tx_timeo_cnt; + data[i++] = rx_skb_alloc_fail; + data[i++] = rx_buf_alloc_fail; + data[i++] = rx_desc_err_dropped_pkt; + data[i++] = priv->interface_up_cnt; + data[i++] = priv->interface_down_cnt; + data[i++] = priv->reset_cnt; + data[i++] = priv->page_alloc_fail; + data[i++] = priv->dma_mapping_error; i = GVE_MAIN_STATS_LEN; /* walk RX rings */ @@ -138,8 +189,25 @@ gve_get_ethtool_stats(struct net_device *netdev, for (ring = 0; ring < priv->rx_cfg.num_queues; ring++) { struct gve_rx_ring *rx = &priv->rx[ring]; - data[i++] = rx->cnt; data[i++] = rx->fill_cnt; + data[i++] = rx->cnt; + do { + start = + u64_stats_fetch_begin(&priv->rx[ring].statss); + tmp_rx_bytes = rx->rbytes; + tmp_rx_skb_alloc_fail = rx->rx_skb_alloc_fail; + tmp_rx_buf_alloc_fail = rx->rx_buf_alloc_fail; + tmp_rx_desc_err_dropped_pkt = + rx->rx_desc_err_dropped_pkt; + } while (u64_stats_fetch_retry(&priv->rx[ring].statss, + start)); + data[i++] = tmp_rx_bytes; + /* rx dropped packets */ + data[i++] = tmp_rx_skb_alloc_fail + + tmp_rx_buf_alloc_fail + + tmp_rx_desc_err_dropped_pkt; + data[i++] = rx->rx_copybreak_pkt; + data[i++] = rx->rx_copied_pkt; } } else { i += priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS; @@ -151,6 +219,13 @@ gve_get_ethtool_stats(struct net_device *netdev, data[i++] = tx->req; data[i++] = tx->done; + do { + start = + u64_stats_fetch_begin(&priv->tx[ring].statss); + tmp_tx_bytes = tx->bytes_done; + } while (u64_stats_fetch_retry(&priv->tx[ring].statss, + start)); + data[i++] = tmp_tx_bytes; data[i++] = tx->wake_queue; data[i++] = tx->stop_queue; data[i++] = be32_to_cpu(gve_tx_load_event_counter(priv, @@ -159,6 +234,20 @@ gve_get_ethtool_stats(struct net_device *netdev, } else { i += priv->tx_cfg.num_queues * NUM_GVE_TX_CNTS; } + /* AQ Stats */ + data[i++] = priv->adminq_prod_cnt; + data[i++] = priv->adminq_cmd_fail; + data[i++] = priv->adminq_timeouts; + data[i++] = priv->adminq_describe_device_cnt; + data[i++] = priv->adminq_cfg_device_resources_cnt; + data[i++] = priv->adminq_register_page_list_cnt; + data[i++] = priv->adminq_unregister_page_list_cnt; + data[i++] = priv->adminq_create_tx_queue_cnt; + data[i++] = priv->adminq_create_rx_queue_cnt; + data[i++] = priv->adminq_destroy_tx_queue_cnt; + data[i++] = priv->adminq_destroy_rx_queue_cnt; + data[i++] = priv->adminq_dcfg_device_resources_cnt; + data[i++] = priv->adminq_set_driver_parameter_cnt; } static void gve_get_channels(struct net_device *netdev, @@ -245,7 +334,8 @@ static int gve_get_tunable(struct net_device *netdev, } static int gve_set_tunable(struct net_device *netdev, - const struct ethtool_tunable *etuna, const void *value) + const struct ethtool_tunable *etuna, + const void *value) { struct gve_priv *priv = netdev_priv(netdev); u32 len; diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c index e032563ceefd..4f6c1fc9c58d 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -514,14 +514,18 @@ static void gve_free_rings(struct gve_priv *priv) } } -int gve_alloc_page(struct device *dev, struct page **page, dma_addr_t *dma, +int gve_alloc_page(struct gve_priv *priv, struct device *dev, + struct page **page, dma_addr_t *dma, enum dma_data_direction dir) { *page = alloc_page(GFP_KERNEL); - if (!*page) + if (!*page) { + priv->page_alloc_fail++; return -ENOMEM; + } *dma = dma_map_page(dev, *page, 0, PAGE_SIZE, dir); if (dma_mapping_error(dev, *dma)) { + priv->dma_mapping_error++; put_page(*page); return -ENOMEM; } @@ -556,7 +560,7 @@ static int gve_alloc_queue_page_list(struct gve_priv *priv, u32 id, return -ENOMEM; for (i = 0; i < pages; i++) { - err = gve_alloc_page(&priv->pdev->dev, &qpl->pages[i], + err = gve_alloc_page(priv, &priv->pdev->dev, &qpl->pages[i], &qpl->page_buses[i], gve_qpl_dma_dir(priv, id)); /* caller handles clean up */ @@ -697,6 +701,7 @@ static int gve_open(struct net_device *dev) gve_turnup(priv); netif_carrier_on(dev); + priv->interface_up_cnt++; return 0; free_rings: @@ -738,6 +743,7 @@ static int gve_close(struct net_device *dev) gve_free_rings(priv); gve_free_qpls(priv); + priv->interface_down_cnt++; return 0; err: @@ -1047,6 +1053,9 @@ int gve_reset(struct gve_priv *priv, bool attempt_teardown) /* Set it all back up */ err = gve_reset_recovery(priv, was_up); gve_clear_reset_in_progress(priv); + priv->reset_cnt++; + priv->interface_up_cnt = 0; + priv->interface_down_cnt = 0; return err; } diff --git a/drivers/net/ethernet/google/gve/gve_rx.c b/drivers/net/ethernet/google/gve/gve_rx.c index 9f52e72ff641..008fa897a3e6 100644 --- a/drivers/net/ethernet/google/gve/gve_rx.c +++ b/drivers/net/ethernet/google/gve/gve_rx.c @@ -225,7 +225,8 @@ static enum pkt_hash_types gve_rss_type(__be16 pkt_flags) return PKT_HASH_TYPE_L2; } -static struct sk_buff *gve_rx_copy(struct net_device *dev, +static struct sk_buff *gve_rx_copy(struct gve_rx_ring *rx, + struct net_device *dev, struct napi_struct *napi, struct gve_rx_slot_page_info *page_info, u16 len) @@ -242,6 +243,11 @@ static struct sk_buff *gve_rx_copy(struct net_device *dev, skb_copy_to_linear_data(skb, va, len); skb->protocol = eth_type_trans(skb, dev); + + u64_stats_update_begin(&rx->statss); + rx->rx_copied_pkt++; + u64_stats_update_end(&rx->statss); + return skb; } @@ -284,8 +290,12 @@ static bool gve_rx(struct gve_rx_ring *rx, struct gve_rx_desc *rx_desc, u16 len; /* drop this packet */ - if (unlikely(rx_desc->flags_seq & GVE_RXF_ERR)) + if (unlikely(rx_desc->flags_seq & GVE_RXF_ERR)) { + u64_stats_update_begin(&rx->statss); + rx->rx_desc_err_dropped_pkt++; + u64_stats_update_end(&rx->statss); return true; + } len = be16_to_cpu(rx_desc->len) - GVE_RX_PAD; page_info = &rx->data.page_info[idx]; @@ -300,11 +310,14 @@ static bool gve_rx(struct gve_rx_ring *rx, struct gve_rx_desc *rx_desc, if (PAGE_SIZE == 4096) { if (len <= priv->rx_copybreak) { /* Just copy small packets */ - skb = gve_rx_copy(dev, napi, page_info, len); + skb = gve_rx_copy(rx, dev, napi, page_info, len); + u64_stats_update_begin(&rx->statss); + rx->rx_copybreak_pkt++; + u64_stats_update_end(&rx->statss); goto have_skb; } if (unlikely(!gve_can_recycle_pages(dev))) { - skb = gve_rx_copy(dev, napi, page_info, len); + skb = gve_rx_copy(rx, dev, napi, page_info, len); goto have_skb; } pagecount = page_count(page_info->page); @@ -314,8 +327,12 @@ static bool gve_rx(struct gve_rx_ring *rx, struct gve_rx_desc *rx_desc, * stack. */ skb = gve_rx_add_frags(dev, napi, page_info, len); - if (!skb) + if (!skb) { + u64_stats_update_begin(&rx->statss); + rx->rx_skb_alloc_fail++; + u64_stats_update_end(&rx->statss); return true; + } /* Make sure the kernel stack can't release the page */ get_page(page_info->page); /* "flip" to other packet buffer on this page */ @@ -324,21 +341,25 @@ static bool gve_rx(struct gve_rx_ring *rx, struct gve_rx_desc *rx_desc, /* We have previously passed the other half of this * page up the stack, but it has not yet been freed. */ - skb = gve_rx_copy(dev, napi, page_info, len); + skb = gve_rx_copy(rx, dev, napi, page_info, len); } else { WARN(pagecount < 1, "Pagecount should never be < 1"); return false; } } else { - skb = gve_rx_copy(dev, napi, page_info, len); + skb = gve_rx_copy(rx, dev, napi, page_info, len); } have_skb: /* We didn't manage to allocate an skb but we haven't had any * reset worthy failures. */ - if (!skb) + if (!skb) { + u64_stats_update_begin(&rx->statss); + rx->rx_skb_alloc_fail++; + u64_stats_update_end(&rx->statss); return true; + } if (likely(feat & NETIF_F_RXCSUM)) { /* NIC passes up the partial sum */ From patchwork Fri Sep 11 17:38:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Awogbemila X-Patchwork-Id: 261036 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DB42CC433E2 for ; Fri, 11 Sep 2020 17:39:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9B2F5221E7 for ; Fri, 11 Sep 2020 17:39:43 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Fri, 11 Sep 2020 10:39:01 -0700 (PDT) Date: Fri, 11 Sep 2020 10:38:47 -0700 In-Reply-To: <20200911173851.2149095-1-awogbemila@google.com> Message-Id: <20200911173851.2149095-5-awogbemila@google.com> Mime-Version: 1.0 References: <20200911173851.2149095-1-awogbemila@google.com> X-Mailer: git-send-email 2.28.0.618.gf4bc123cb7-goog Subject: [PATCH net-next v4 4/8] gve: Add Gvnic stats AQ command and ethtool show/set-priv-flags. From: David Awogbemila To: netdev@vger.kernel.org Cc: Kuo Zhao , Yangchun Fu , David Awogbemila Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Kuo Zhao This adds functionality to report driver stats to Hypervisor. (Users may want to turn this feature off as a matter of privacy so a "report-stats" flag is added as an ethtool priv option. It is also disabled by default.) The hypervisor would trigger a stats report in case "too many" packets dropped; the stats would be useful in debugging stuck queues. A "stats_report_trigger_cnt" stat is added to count the number of times the hypervisor attempts to trigger stats report. A timer is also added so that when report-stats is enabled, stat are updated once every 20 seconds. Reviewed-by: Yangchun Fu Signed-off-by: Kuo Zhao Signed-off-by: David Awogbemila --- drivers/net/ethernet/google/gve/gve.h | 71 ++++++-- drivers/net/ethernet/google/gve/gve_adminq.c | 20 +++ drivers/net/ethernet/google/gve/gve_adminq.h | 38 +++++ drivers/net/ethernet/google/gve/gve_ethtool.c | 113 ++++++++++--- drivers/net/ethernet/google/gve/gve_main.c | 158 +++++++++++++++++- .../net/ethernet/google/gve/gve_register.h | 1 + 6 files changed, 369 insertions(+), 32 deletions(-) diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h index 55b34b437764..00697d5dcc27 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -27,6 +27,13 @@ /* 1 for management, 1 for rx, 1 for tx */ #define GVE_MIN_MSIX 3 +/* Numbers of gve tx/rx stats in stats report. */ +#define GVE_TX_STATS_REPORT_NUM 5 +#define GVE_RX_STATS_REPORT_NUM 2 + +/* Interval to schedule a stats report update, 20000ms. */ +#define GVE_STATS_REPORT_TIMER_PERIOD 20000 + /* Each slot in the desc ring has a 1:1 mapping to a slot in the data ring */ struct gve_rx_desc_queue { struct gve_rx_desc *desc_ring; /* the descriptor ring */ @@ -220,6 +227,7 @@ struct gve_priv { u32 adminq_destroy_rx_queue_cnt; u32 adminq_dcfg_device_resources_cnt; u32 adminq_set_driver_parameter_cnt; + u32 adminq_report_stats_cnt; /* Global stats */ u32 interface_up_cnt; /* count of times interface turned up since last reset */ @@ -227,24 +235,39 @@ struct gve_priv { u32 reset_cnt; /* count of reset */ u32 page_alloc_fail; /* count of page alloc fails */ u32 dma_mapping_error; /* count of dma mapping errors */ - + u32 stats_report_trigger_cnt; /* count of device-requested stats-reports since last reset */ struct workqueue_struct *gve_wq; struct work_struct service_task; + struct work_struct stats_report_task; unsigned long service_task_flags; unsigned long state_flags; + + struct gve_stats_report *stats_report; + u64 stats_report_len; + dma_addr_t stats_report_bus; /* dma address for the stats report */ + unsigned long ethtool_flags; + + unsigned long stats_report_timer_period; + struct timer_list stats_report_timer; + }; -enum gve_service_task_flags { - GVE_PRIV_FLAGS_DO_RESET = BIT(1), - GVE_PRIV_FLAGS_RESET_IN_PROGRESS = BIT(2), - GVE_PRIV_FLAGS_PROBE_IN_PROGRESS = BIT(3), +enum gve_service_task_flags_bit { + GVE_PRIV_FLAGS_DO_RESET = 1, + GVE_PRIV_FLAGS_RESET_IN_PROGRESS = 2, + GVE_PRIV_FLAGS_PROBE_IN_PROGRESS = 3, + GVE_PRIV_FLAGS_DO_REPORT_STATS = 4, }; -enum gve_state_flags { - GVE_PRIV_FLAGS_ADMIN_QUEUE_OK = BIT(1), - GVE_PRIV_FLAGS_DEVICE_RESOURCES_OK = BIT(2), - GVE_PRIV_FLAGS_DEVICE_RINGS_OK = BIT(3), - GVE_PRIV_FLAGS_NAPI_ENABLED = BIT(4), +enum gve_state_flags_bit { + GVE_PRIV_FLAGS_ADMIN_QUEUE_OK = 1, + GVE_PRIV_FLAGS_DEVICE_RESOURCES_OK = 2, + GVE_PRIV_FLAGS_DEVICE_RINGS_OK = 3, + GVE_PRIV_FLAGS_NAPI_ENABLED = 4, +}; + +enum gve_ethtool_flags_bit { + GVE_PRIV_FLAGS_REPORT_STATS = 0, }; static inline bool gve_get_do_reset(struct gve_priv *priv) @@ -294,6 +317,22 @@ static inline void gve_clear_probe_in_progress(struct gve_priv *priv) clear_bit(GVE_PRIV_FLAGS_PROBE_IN_PROGRESS, &priv->service_task_flags); } +static inline bool gve_get_do_report_stats(struct gve_priv *priv) +{ + return test_bit(GVE_PRIV_FLAGS_DO_REPORT_STATS, + &priv->service_task_flags); +} + +static inline void gve_set_do_report_stats(struct gve_priv *priv) +{ + set_bit(GVE_PRIV_FLAGS_DO_REPORT_STATS, &priv->service_task_flags); +} + +static inline void gve_clear_do_report_stats(struct gve_priv *priv) +{ + clear_bit(GVE_PRIV_FLAGS_DO_REPORT_STATS, &priv->service_task_flags); +} + static inline bool gve_get_admin_queue_ok(struct gve_priv *priv) { return test_bit(GVE_PRIV_FLAGS_ADMIN_QUEUE_OK, &priv->state_flags); @@ -354,6 +393,16 @@ static inline void gve_clear_napi_enabled(struct gve_priv *priv) clear_bit(GVE_PRIV_FLAGS_NAPI_ENABLED, &priv->state_flags); } +static inline bool gve_get_report_stats(struct gve_priv *priv) +{ + return test_bit(GVE_PRIV_FLAGS_REPORT_STATS, &priv->ethtool_flags); +} + +static inline void gve_clear_report_stats(struct gve_priv *priv) +{ + clear_bit(GVE_PRIV_FLAGS_REPORT_STATS, &priv->ethtool_flags); +} + /* Returns the address of the ntfy_blocks irq doorbell */ static inline __be32 __iomem *gve_irq_doorbell(struct gve_priv *priv, @@ -476,6 +525,8 @@ int gve_reset(struct gve_priv *priv, bool attempt_teardown); int gve_adjust_queues(struct gve_priv *priv, struct gve_queue_config new_rx_config, struct gve_queue_config new_tx_config); +/* report stats handling */ +void gve_handle_report_stats(struct gve_priv *priv); /* exported by ethtool.c */ extern const struct ethtool_ops gve_ethtool_ops; /* needed by ethtool */ diff --git a/drivers/net/ethernet/google/gve/gve_adminq.c b/drivers/net/ethernet/google/gve/gve_adminq.c index d9aed217c1d6..078e6e40880d 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.c +++ b/drivers/net/ethernet/google/gve/gve_adminq.c @@ -35,6 +35,7 @@ int gve_adminq_alloc(struct device *dev, struct gve_priv *priv) priv->adminq_destroy_rx_queue_cnt = 0; priv->adminq_dcfg_device_resources_cnt = 0; priv->adminq_set_driver_parameter_cnt = 0; + priv->adminq_report_stats_cnt = 0; /* Setup Admin queue with the device */ iowrite32be(priv->adminq_bus_addr / PAGE_SIZE, @@ -183,6 +184,9 @@ int gve_adminq_execute_cmd(struct gve_priv *priv, case GVE_ADMINQ_SET_DRIVER_PARAMETER: priv->adminq_set_driver_parameter_cnt++; break; + case GVE_ADMINQ_REPORT_STATS: + priv->adminq_report_stats_cnt++; + break; default: dev_err(&priv->pdev->dev, "unknown AQ command opcode %d\n", opcode); } @@ -433,3 +437,19 @@ int gve_adminq_set_mtu(struct gve_priv *priv, u64 mtu) return gve_adminq_execute_cmd(priv, &cmd); } + +int gve_adminq_report_stats(struct gve_priv *priv, u64 stats_report_len, + dma_addr_t stats_report_addr, u64 interval) +{ + union gve_adminq_command cmd; + + memset(&cmd, 0, sizeof(cmd)); + cmd.opcode = cpu_to_be32(GVE_ADMINQ_REPORT_STATS); + cmd.report_stats = (struct gve_adminq_report_stats) { + .stats_report_len = cpu_to_be64(stats_report_len), + .stats_report_addr = cpu_to_be64(stats_report_addr), + .interval = cpu_to_be64(interval), + }; + + return gve_adminq_execute_cmd(priv, &cmd); +} diff --git a/drivers/net/ethernet/google/gve/gve_adminq.h b/drivers/net/ethernet/google/gve/gve_adminq.h index 4dfa06edc0f8..b81a3bb76d5e 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.h +++ b/drivers/net/ethernet/google/gve/gve_adminq.h @@ -21,6 +21,7 @@ enum gve_adminq_opcodes { GVE_ADMINQ_DESTROY_RX_QUEUE = 0x8, GVE_ADMINQ_DECONFIGURE_DEVICE_RESOURCES = 0x9, GVE_ADMINQ_SET_DRIVER_PARAMETER = 0xB, + GVE_ADMINQ_REPORT_STATS = 0xC, }; /* Admin queue status codes */ @@ -172,6 +173,40 @@ struct gve_adminq_set_driver_parameter { static_assert(sizeof(struct gve_adminq_set_driver_parameter) == 16); +struct gve_adminq_report_stats { + __be64 stats_report_len; + __be64 stats_report_addr; + __be64 interval; +}; + +static_assert(sizeof(struct gve_adminq_report_stats) == 24); + +struct stats { + __be32 stat_name; + __be32 queue_id; + __be64 value; +}; + +static_assert(sizeof(struct stats) == 16); + +struct gve_stats_report { + __be64 written_count; + struct stats stats[0]; +}; + +static_assert(sizeof(struct gve_stats_report) == 8); + +enum gve_stat_names { + // stats from gve + TX_WAKE_CNT = 1, + TX_STOP_CNT = 2, + TX_FRAMES_SENT = 3, + TX_BYTES_SENT = 4, + TX_LAST_COMPLETION_PROCESSED = 5, + RX_NEXT_EXPECTED_SEQUENCE = 6, + RX_BUFFERS_POSTED = 7, +}; + union gve_adminq_command { struct { __be32 opcode; @@ -187,6 +222,7 @@ union gve_adminq_command { struct gve_adminq_register_page_list reg_page_list; struct gve_adminq_unregister_page_list unreg_page_list; struct gve_adminq_set_driver_parameter set_driver_param; + struct gve_adminq_report_stats report_stats; }; }; u8 reserved[64]; @@ -214,4 +250,6 @@ int gve_adminq_register_page_list(struct gve_priv *priv, struct gve_queue_page_list *qpl); int gve_adminq_unregister_page_list(struct gve_priv *priv, u32 page_list_id); int gve_adminq_set_mtu(struct gve_priv *priv, u64 mtu); +int gve_adminq_report_stats(struct gve_priv *priv, u64 stats_report_len, + dma_addr_t stats_report_addr, u64 interval); #endif /* _GVE_ADMINQ_H */ diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c index e9bef1ff7ec3..67239faa7554 100644 --- a/drivers/net/ethernet/google/gve/gve_ethtool.c +++ b/drivers/net/ethernet/google/gve/gve_ethtool.c @@ -6,6 +6,7 @@ #include #include "gve.h" +#include "gve_adminq.h" static void gve_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info) @@ -36,7 +37,7 @@ static const char gve_gstrings_main_stats[][ETH_GSTRING_LEN] = { "rx_dropped", "tx_dropped", "tx_timeouts", "rx_skb_alloc_fail", "rx_buf_alloc_fail", "rx_desc_err_dropped_pkt", "interface_up_cnt", "interface_down_cnt", "reset_cnt", - "page_alloc_fail", "dma_mapping_error", + "page_alloc_fail", "dma_mapping_error", "stats_report_trigger_cnt", }; static const char gve_gstrings_rx_stats[][ETH_GSTRING_LEN] = { @@ -56,12 +57,18 @@ 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", +}; + +static const char gve_gstrings_priv_flags[][ETH_GSTRING_LEN] = { + "report-stats", }; #define GVE_MAIN_STATS_LEN ARRAY_SIZE(gve_gstrings_main_stats) #define GVE_ADMINQ_STATS_LEN ARRAY_SIZE(gve_gstrings_adminq_stats) #define NUM_GVE_TX_CNTS ARRAY_SIZE(gve_gstrings_tx_stats) #define NUM_GVE_RX_CNTS ARRAY_SIZE(gve_gstrings_rx_stats) +#define GVE_PRIV_FLAGS_STR_LEN ARRAY_SIZE(gve_gstrings_priv_flags) static void gve_get_strings(struct net_device *netdev, u32 stringset, u8 *data) { @@ -69,28 +76,42 @@ static void gve_get_strings(struct net_device *netdev, u32 stringset, u8 *data) char *s = (char *)data; int i, j; - if (stringset != ETH_SS_STATS) - return; - - memcpy(s, *gve_gstrings_main_stats, - sizeof(gve_gstrings_main_stats)); - s += sizeof(gve_gstrings_main_stats); - for (i = 0; i < priv->rx_cfg.num_queues; i++) { - for (j = 0; j < NUM_GVE_RX_CNTS; j++) { - snprintf(s, ETH_GSTRING_LEN, gve_gstrings_rx_stats[j], i); - s += ETH_GSTRING_LEN; + switch (stringset) { + case ETH_SS_STATS: + memcpy(s, *gve_gstrings_main_stats, + sizeof(gve_gstrings_main_stats)); + s += sizeof(gve_gstrings_main_stats); + + for (i = 0; i < priv->rx_cfg.num_queues; i++) { + for (j = 0; j < NUM_GVE_RX_CNTS; j++) { + snprintf(s, ETH_GSTRING_LEN, + gve_gstrings_rx_stats[j], i); + s += ETH_GSTRING_LEN; + } } - } - for (i = 0; i < priv->tx_cfg.num_queues; i++) { - for (j = 0; j < NUM_GVE_TX_CNTS; j++) { - snprintf(s, ETH_GSTRING_LEN, gve_gstrings_tx_stats[j], i); - s += ETH_GSTRING_LEN; + + for (i = 0; i < priv->tx_cfg.num_queues; i++) { + for (j = 0; j < NUM_GVE_TX_CNTS; j++) { + snprintf(s, ETH_GSTRING_LEN, + gve_gstrings_tx_stats[j], i); + s += ETH_GSTRING_LEN; + } } - } - memcpy(s, *gve_gstrings_adminq_stats, - sizeof(gve_gstrings_adminq_stats)); - s += sizeof(gve_gstrings_adminq_stats); + memcpy(s, *gve_gstrings_adminq_stats, + sizeof(gve_gstrings_adminq_stats)); + s += sizeof(gve_gstrings_adminq_stats); + break; + + case ETH_SS_PRIV_FLAGS: + memcpy(s, *gve_gstrings_priv_flags, + sizeof(gve_gstrings_priv_flags)); + s += sizeof(gve_gstrings_priv_flags); + break; + + default: + break; + } } static int gve_get_sset_count(struct net_device *netdev, int sset) @@ -102,6 +123,8 @@ static int gve_get_sset_count(struct net_device *netdev, int sset) return GVE_MAIN_STATS_LEN + GVE_ADMINQ_STATS_LEN + (priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS) + (priv->tx_cfg.num_queues * NUM_GVE_TX_CNTS); + case ETH_SS_PRIV_FLAGS: + return GVE_PRIV_FLAGS_STR_LEN; default: return -EOPNOTSUPP; } @@ -182,6 +205,7 @@ gve_get_ethtool_stats(struct net_device *netdev, data[i++] = priv->reset_cnt; data[i++] = priv->page_alloc_fail; data[i++] = priv->dma_mapping_error; + data[i++] = priv->stats_report_trigger_cnt; i = GVE_MAIN_STATS_LEN; /* walk RX rings */ @@ -248,6 +272,7 @@ gve_get_ethtool_stats(struct net_device *netdev, data[i++] = priv->adminq_destroy_rx_queue_cnt; data[i++] = priv->adminq_dcfg_device_resources_cnt; data[i++] = priv->adminq_set_driver_parameter_cnt; + data[i++] = priv->adminq_report_stats_cnt; } static void gve_get_channels(struct net_device *netdev, @@ -352,6 +377,52 @@ static int gve_set_tunable(struct net_device *netdev, } } +static u32 gve_get_priv_flags(struct net_device *netdev) +{ + struct gve_priv *priv = netdev_priv(netdev); + u32 ret_flags = 0; + + /* Only 1 flag exists currently: report-stats (BIT(O)), so set that flag. */ + if (priv->ethtool_flags & BIT(0)) + ret_flags |= BIT(0); + return ret_flags; +} + +static int gve_set_priv_flags(struct net_device *netdev, u32 flags) +{ + struct gve_priv *priv = netdev_priv(netdev); + u64 ori_flags, new_flags; + + ori_flags = READ_ONCE(priv->ethtool_flags); + new_flags = ori_flags; + + /* Only one priv flag exists: report-stats (BIT(0))*/ + if (flags & BIT(0)) + new_flags |= BIT(0); + else + new_flags &= ~(BIT(0)); + priv->ethtool_flags = new_flags; + /* start report-stats timer when user turns report stats on. */ + if (flags & BIT(0)) { + mod_timer(&priv->stats_report_timer, + round_jiffies(jiffies + + msecs_to_jiffies(priv->stats_report_timer_period))); + } + /* Zero off gve stats when report-stats turned off and */ + /* delete report stats timer. */ + if (!(flags & BIT(0)) && (ori_flags & BIT(0))) { + int tx_stats_num = GVE_TX_STATS_REPORT_NUM * + priv->tx_cfg.num_queues; + int rx_stats_num = GVE_RX_STATS_REPORT_NUM * + priv->rx_cfg.num_queues; + + memset(priv->stats_report->stats, 0, (tx_stats_num + rx_stats_num) * + sizeof(struct stats)); + del_timer_sync(&priv->stats_report_timer); + } + return 0; +} + const struct ethtool_ops gve_ethtool_ops = { .get_drvinfo = gve_get_drvinfo, .get_strings = gve_get_strings, @@ -366,4 +437,6 @@ const struct ethtool_ops gve_ethtool_ops = { .reset = gve_user_reset, .get_tunable = gve_get_tunable, .set_tunable = gve_set_tunable, + .get_priv_flags = gve_get_priv_flags, + .set_priv_flags = gve_set_priv_flags, }; diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c index 0fc68f844edf..936ff4c9d250 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -78,6 +78,66 @@ static void gve_free_counter_array(struct gve_priv *priv) priv->counter_array = NULL; } +/* NIC requests to report stats */ +static void gve_stats_report_task(struct work_struct *work) +{ + struct gve_priv *priv = container_of(work, struct gve_priv, + stats_report_task); + if (gve_get_do_report_stats(priv)) { + gve_handle_report_stats(priv); + gve_clear_do_report_stats(priv); + } +} + +static void gve_stats_report_schedule(struct gve_priv *priv) +{ + if (!gve_get_probe_in_progress(priv) && + !gve_get_reset_in_progress(priv)) { + gve_set_do_report_stats(priv); + queue_work(priv->gve_wq, &priv->stats_report_task); + } +} + +static void gve_stats_report_timer(struct timer_list *t) +{ + struct gve_priv *priv = from_timer(priv, t, stats_report_timer); + + mod_timer(&priv->stats_report_timer, + round_jiffies(jiffies + + msecs_to_jiffies(priv->stats_report_timer_period))); + gve_stats_report_schedule(priv); +} + +static int gve_alloc_stats_report(struct gve_priv *priv) +{ + int tx_stats_num, rx_stats_num; + + tx_stats_num = (GVE_TX_STATS_REPORT_NUM) * + priv->tx_cfg.num_queues; + rx_stats_num = (GVE_RX_STATS_REPORT_NUM) * + priv->rx_cfg.num_queues; + priv->stats_report_len = sizeof(struct gve_stats_report) + + (tx_stats_num + rx_stats_num) * + sizeof(struct stats); + priv->stats_report = + dma_alloc_coherent(&priv->pdev->dev, priv->stats_report_len, + &priv->stats_report_bus, GFP_KERNEL); + if (!priv->stats_report) + return -ENOMEM; + /* Set up timer for the report-stats task */ + timer_setup(&priv->stats_report_timer, gve_stats_report_timer, 0); + priv->stats_report_timer_period = GVE_STATS_REPORT_TIMER_PERIOD; + return 0; +} + +static void gve_free_stats_report(struct gve_priv *priv) +{ + del_timer_sync(&priv->stats_report_timer); + dma_free_coherent(&priv->pdev->dev, priv->stats_report_len, + priv->stats_report, priv->stats_report_bus); + priv->stats_report = NULL; +} + static irqreturn_t gve_mgmnt_intr(int irq, void *arg) { struct gve_priv *priv = arg; @@ -270,6 +330,9 @@ static int gve_setup_device_resources(struct gve_priv *priv) err = gve_alloc_notify_blocks(priv); if (err) goto abort_with_counter; + err = gve_alloc_stats_report(priv); + if (err) + goto abort_with_ntfy_blocks; err = gve_adminq_configure_device_resources(priv, priv->counter_array_bus, priv->num_event_counters, @@ -279,10 +342,18 @@ static int gve_setup_device_resources(struct gve_priv *priv) dev_err(&priv->pdev->dev, "could not setup device_resources: err=%d\n", err); err = -ENXIO; - goto abort_with_ntfy_blocks; + goto abort_with_stats_report; } + err = gve_adminq_report_stats(priv, priv->stats_report_len, + priv->stats_report_bus, + GVE_STATS_REPORT_TIMER_PERIOD); + if (err) + dev_err(&priv->pdev->dev, + "Failed to report stats: err=%d\n", err); gve_set_device_resources_ok(priv); return 0; +abort_with_stats_report: + gve_free_stats_report(priv); abort_with_ntfy_blocks: gve_free_notify_blocks(priv); abort_with_counter: @@ -298,6 +369,13 @@ static void gve_teardown_device_resources(struct gve_priv *priv) /* Tell device its resources are being freed */ if (gve_get_device_resources_ok(priv)) { + /* detach the stats report */ + err = gve_adminq_report_stats(priv, 0, 0x0, GVE_STATS_REPORT_TIMER_PERIOD); + if (err) { + dev_err(&priv->pdev->dev, + "Failed to detach stats report: err=%d\n", err); + gve_trigger_reset(priv); + } err = gve_adminq_deconfigure_device_resources(priv); if (err) { dev_err(&priv->pdev->dev, @@ -308,6 +386,7 @@ static void gve_teardown_device_resources(struct gve_priv *priv) } gve_free_counter_array(priv); gve_free_notify_blocks(priv); + gve_free_stats_report(priv); gve_clear_device_resources_ok(priv); } @@ -699,6 +778,11 @@ static int gve_open(struct net_device *dev) goto reset; gve_set_device_rings_ok(priv); + if (gve_get_report_stats(priv)) + mod_timer(&priv->stats_report_timer, + round_jiffies(jiffies + + msecs_to_jiffies(priv->stats_report_timer_period))); + gve_turnup(priv); netif_carrier_on(dev); priv->interface_up_cnt++; @@ -740,6 +824,7 @@ static int gve_close(struct net_device *dev) goto err; gve_clear_device_rings_ok(priv); } + del_timer_sync(&priv->stats_report_timer); gve_free_rings(priv); gve_free_qpls(priv); @@ -823,6 +908,7 @@ static void gve_turndown(struct gve_priv *priv) netif_tx_disable(priv->dev); gve_clear_napi_enabled(priv); + gve_clear_report_stats(priv); } static void gve_turnup(struct gve_priv *priv) @@ -873,6 +959,10 @@ static void gve_handle_status(struct gve_priv *priv, u32 status) dev_info(&priv->pdev->dev, "Device requested reset.\n"); gve_set_do_reset(priv); } + if (GVE_DEVICE_STATUS_REPORT_STATS_MASK & status) { + priv->stats_report_trigger_cnt++; + gve_set_do_report_stats(priv); + } } static void gve_handle_reset(struct gve_priv *priv) @@ -891,7 +981,68 @@ static void gve_handle_reset(struct gve_priv *priv) } } -/* Handle NIC status register changes and reset requests */ +void gve_handle_report_stats(struct gve_priv *priv) +{ + int idx, stats_idx = 0, tx_bytes; + unsigned int start = 0; + struct stats *stats = priv->stats_report->stats; + + if (!gve_get_report_stats(priv)) + return; + + be64_add_cpu(&priv->stats_report->written_count, 1); + /* tx stats */ + if (priv->tx) { + for (idx = 0; idx < priv->tx_cfg.num_queues; idx++) { + do { + start = u64_stats_fetch_begin(&priv->tx[idx].statss); + tx_bytes = priv->tx[idx].bytes_done; + } while (u64_stats_fetch_retry(&priv->tx[idx].statss, start)); + stats[stats_idx++] = (struct stats) { + .stat_name = cpu_to_be32(TX_WAKE_CNT), + .value = cpu_to_be64(priv->tx[idx].wake_queue), + .queue_id = cpu_to_be32(idx), + }; + stats[stats_idx++] = (struct stats) { + .stat_name = cpu_to_be32(TX_STOP_CNT), + .value = cpu_to_be64(priv->tx[idx].stop_queue), + .queue_id = cpu_to_be32(idx), + }; + stats[stats_idx++] = (struct stats) { + .stat_name = cpu_to_be32(TX_FRAMES_SENT), + .value = cpu_to_be64(priv->tx[idx].req), + .queue_id = cpu_to_be32(idx), + }; + stats[stats_idx++] = (struct stats) { + .stat_name = cpu_to_be32(TX_BYTES_SENT), + .value = cpu_to_be64(tx_bytes), + .queue_id = cpu_to_be32(idx), + }; + stats[stats_idx++] = (struct stats) { + .stat_name = cpu_to_be32(TX_LAST_COMPLETION_PROCESSED), + .value = cpu_to_be64(priv->tx[idx].done), + .queue_id = cpu_to_be32(idx), + }; + } + } + /* rx stats */ + if (priv->rx) { + for (idx = 0; idx < priv->rx_cfg.num_queues; idx++) { + stats[stats_idx++] = (struct stats) { + .stat_name = cpu_to_be32(RX_NEXT_EXPECTED_SEQUENCE), + .value = cpu_to_be64(priv->rx[idx].desc.seqno), + .queue_id = cpu_to_be32(idx), + }; + stats[stats_idx++] = (struct stats) { + .stat_name = cpu_to_be32(RX_BUFFERS_POSTED), + .value = cpu_to_be64(priv->rx[0].fill_cnt), + .queue_id = cpu_to_be32(idx), + }; + } + } +} + +/* Handle NIC status register changes, reset requests and report stats */ static void gve_service_task(struct work_struct *work) { struct gve_priv *priv = container_of(work, struct gve_priv, @@ -1056,6 +1207,7 @@ int gve_reset(struct gve_priv *priv, bool attempt_teardown) priv->reset_cnt++; priv->interface_up_cnt = 0; priv->interface_down_cnt = 0; + priv->stats_report_trigger_cnt = 0; return err; } @@ -1158,6 +1310,7 @@ static int gve_probe(struct pci_dev *pdev, const struct pci_device_id *ent) priv->db_bar2 = db_bar; priv->service_task_flags = 0x0; priv->state_flags = 0x0; + priv->ethtool_flags = 0x0; gve_set_probe_in_progress(priv); priv->gve_wq = alloc_ordered_workqueue("gve", 0); @@ -1167,6 +1320,7 @@ static int gve_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto abort_with_netdev; } INIT_WORK(&priv->service_task, gve_service_task); + INIT_WORK(&priv->stats_report_task, gve_stats_report_task); priv->tx_cfg.max_queues = max_tx_queues; priv->rx_cfg.max_queues = max_rx_queues; diff --git a/drivers/net/ethernet/google/gve/gve_register.h b/drivers/net/ethernet/google/gve/gve_register.h index 84ab8893aadd..fb655463c357 100644 --- a/drivers/net/ethernet/google/gve/gve_register.h +++ b/drivers/net/ethernet/google/gve/gve_register.h @@ -23,5 +23,6 @@ struct gve_registers { enum gve_device_status_flags { GVE_DEVICE_STATUS_RESET_MASK = BIT(1), GVE_DEVICE_STATUS_LINK_STATUS_MASK = BIT(2), + GVE_DEVICE_STATUS_REPORT_STATS_MASK = BIT(3), }; #endif /* _GVE_REGISTER_H_ */ From patchwork Fri Sep 11 17:38:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Awogbemila X-Patchwork-Id: 261034 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5386DC43461 for ; Fri, 11 Sep 2020 17:40:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0F1E1221ED for ; Fri, 11 Sep 2020 17:40:14 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Fri, 11 Sep 2020 10:39:03 -0700 (PDT) Date: Fri, 11 Sep 2020 10:38:48 -0700 In-Reply-To: <20200911173851.2149095-1-awogbemila@google.com> Message-Id: <20200911173851.2149095-6-awogbemila@google.com> Mime-Version: 1.0 References: <20200911173851.2149095-1-awogbemila@google.com> X-Mailer: git-send-email 2.28.0.618.gf4bc123cb7-goog Subject: [PATCH net-next v4 5/8] gve: NIC stats for report-stats and for ethtool From: David Awogbemila To: netdev@vger.kernel.org Cc: David Awogbemila Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This adds per queue NIC stats to ethtool stats and to report-stats. These stats are always exposed to guest whether or not the report-stats flag is turned on. Signed-off-by: David Awogbemila --- drivers/net/ethernet/google/gve/gve.h | 4 + drivers/net/ethernet/google/gve/gve_adminq.h | 5 ++ drivers/net/ethernet/google/gve/gve_ethtool.c | 84 ++++++++++++++++++- drivers/net/ethernet/google/gve/gve_main.c | 4 +- 4 files changed, 94 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h index 00697d5dcc27..ebb770f955e9 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -34,6 +34,10 @@ /* Interval to schedule a stats report update, 20000ms. */ #define GVE_STATS_REPORT_TIMER_PERIOD 20000 +/* Numbers of NIC tx/rx stats in stats report. */ +#define NIC_TX_STATS_REPORT_NUM 0 +#define NIC_RX_STATS_REPORT_NUM 4 + /* Each slot in the desc ring has a 1:1 mapping to a slot in the data ring */ struct gve_rx_desc_queue { struct gve_rx_desc *desc_ring; /* the descriptor ring */ diff --git a/drivers/net/ethernet/google/gve/gve_adminq.h b/drivers/net/ethernet/google/gve/gve_adminq.h index b81a3bb76d5e..a6c8c29f0d13 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.h +++ b/drivers/net/ethernet/google/gve/gve_adminq.h @@ -205,6 +205,11 @@ enum gve_stat_names { TX_LAST_COMPLETION_PROCESSED = 5, RX_NEXT_EXPECTED_SEQUENCE = 6, RX_BUFFERS_POSTED = 7, + // stats from NIC + RX_QUEUE_DROP_CNT = 65, + RX_NO_BUFFERS_POSTED = 66, + RX_DROPS_PACKET_OVER_MRU = 67, + RX_DROPS_INVALID_CHECKSUM = 68, }; union gve_adminq_command { diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c index 67239faa7554..c5bb8846fd26 100644 --- a/drivers/net/ethernet/google/gve/gve_ethtool.c +++ b/drivers/net/ethernet/google/gve/gve_ethtool.c @@ -43,6 +43,8 @@ static const char gve_gstrings_main_stats[][ETH_GSTRING_LEN] = { static const char gve_gstrings_rx_stats[][ETH_GSTRING_LEN] = { "rx_posted_desc[%u]", "rx_completed_desc[%u]", "rx_bytes[%u]", "rx_dropped_pkt[%u]", "rx_copybreak_pkt[%u]", "rx_copied_pkt[%u]", + "rx_queue_drop_cnt[%u]", "rx_no_buffers_posted[%u]", + "rx_drops_packet_over_mru[%u]", "rx_drops_invalid_checksum[%u]", }; static const char gve_gstrings_tx_stats[][ETH_GSTRING_LEN] = { @@ -138,14 +140,30 @@ gve_get_ethtool_stats(struct net_device *netdev, tmp_rx_desc_err_dropped_pkt, tmp_tx_pkts, tmp_tx_bytes; u64 rx_buf_alloc_fail, rx_desc_err_dropped_pkt, rx_pkts, rx_skb_alloc_fail, rx_bytes, tx_pkts, tx_bytes; + int stats_idx, base_stats_idx, max_stats_idx; + struct stats *report_stats; + int *rx_qid_to_stats_idx; + int *tx_qid_to_stats_idx; struct gve_priv *priv; + bool skip_nic_stats; unsigned int start; int ring; - int i; + int i, j; ASSERT_RTNL(); priv = netdev_priv(netdev); + report_stats = priv->stats_report->stats; + rx_qid_to_stats_idx = kmalloc_array(priv->rx_cfg.num_queues, + sizeof(int), GFP_KERNEL); + if (!rx_qid_to_stats_idx) + return; + tx_qid_to_stats_idx = kmalloc_array(priv->tx_cfg.num_queues, + sizeof(int), GFP_KERNEL); + if (!tx_qid_to_stats_idx) { + kfree(rx_qid_to_stats_idx); + return; + } for (rx_pkts = 0, rx_bytes = 0, rx_skb_alloc_fail = 0, rx_buf_alloc_fail = 0, rx_desc_err_dropped_pkt = 0, ring = 0; ring < priv->rx_cfg.num_queues; ring++) { @@ -208,6 +226,25 @@ gve_get_ethtool_stats(struct net_device *netdev, data[i++] = priv->stats_report_trigger_cnt; i = GVE_MAIN_STATS_LEN; + /* For rx cross-reporting stats, start from nic rx stats in report */ + base_stats_idx = GVE_TX_STATS_REPORT_NUM * priv->tx_cfg.num_queues + + GVE_RX_STATS_REPORT_NUM * priv->rx_cfg.num_queues; + max_stats_idx = NIC_RX_STATS_REPORT_NUM * priv->rx_cfg.num_queues + + base_stats_idx; + /* Preprocess the stats report for rx, map queue id to start index */ + skip_nic_stats = false; + for (stats_idx = base_stats_idx; stats_idx < max_stats_idx; + stats_idx += NIC_RX_STATS_REPORT_NUM) { + u32 stat_name = be32_to_cpu(report_stats[stats_idx].stat_name); + u32 queue_id = be32_to_cpu(report_stats[stats_idx].queue_id); + + if (stat_name == 0) { + /* no stats written by NIC yet */ + skip_nic_stats = true; + break; + } + rx_qid_to_stats_idx[queue_id] = stats_idx; + } /* walk RX rings */ if (priv->rx) { for (ring = 0; ring < priv->rx_cfg.num_queues; ring++) { @@ -232,10 +269,41 @@ gve_get_ethtool_stats(struct net_device *netdev, tmp_rx_desc_err_dropped_pkt; data[i++] = rx->rx_copybreak_pkt; data[i++] = rx->rx_copied_pkt; + /* stats from NIC */ + if (skip_nic_stats) { + /* skip NIC rx stats */ + i += NIC_RX_STATS_REPORT_NUM; + continue; + } + for (j = 0; j < NIC_RX_STATS_REPORT_NUM; j++) { + u64 value = + be64_to_cpu(report_stats[rx_qid_to_stats_idx[ring] + j].value); + + data[i++] = value; + } } } else { i += priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS; } + + /* For tx cross-reporting stats, start from nic tx stats in report */ + base_stats_idx = max_stats_idx; + max_stats_idx = NIC_TX_STATS_REPORT_NUM * priv->tx_cfg.num_queues + + max_stats_idx; + /* Preprocess the stats report for tx, map queue id to start index */ + skip_nic_stats = false; + for (stats_idx = base_stats_idx; stats_idx < max_stats_idx; + stats_idx += NIC_TX_STATS_REPORT_NUM) { + u32 stat_name = be32_to_cpu(report_stats[stats_idx].stat_name); + u32 queue_id = be32_to_cpu(report_stats[stats_idx].queue_id); + + if (stat_name == 0) { + /* no stats written by NIC yet */ + skip_nic_stats = true; + break; + } + tx_qid_to_stats_idx[queue_id] = stats_idx; + } /* walk TX rings */ if (priv->tx) { for (ring = 0; ring < priv->tx_cfg.num_queues; ring++) { @@ -254,10 +322,24 @@ gve_get_ethtool_stats(struct net_device *netdev, data[i++] = tx->stop_queue; data[i++] = be32_to_cpu(gve_tx_load_event_counter(priv, tx)); + /* stats from NIC */ + if (skip_nic_stats) { + /* skip NIC tx stats */ + i += NIC_TX_STATS_REPORT_NUM; + continue; + } + for (j = 0; j < NIC_TX_STATS_REPORT_NUM; j++) { + u64 value = + be64_to_cpu(report_stats[tx_qid_to_stats_idx[ring] + j].value); + data[i++] = value; + } } } else { i += priv->tx_cfg.num_queues * NUM_GVE_TX_CNTS; } + + kfree(rx_qid_to_stats_idx); + kfree(tx_qid_to_stats_idx); /* AQ Stats */ data[i++] = priv->adminq_prod_cnt; data[i++] = priv->adminq_cmd_fail; diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c index 936ff4c9d250..7c5a11356b1c 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -112,9 +112,9 @@ static int gve_alloc_stats_report(struct gve_priv *priv) { int tx_stats_num, rx_stats_num; - tx_stats_num = (GVE_TX_STATS_REPORT_NUM) * + tx_stats_num = (GVE_TX_STATS_REPORT_NUM + NIC_TX_STATS_REPORT_NUM) * priv->tx_cfg.num_queues; - rx_stats_num = (GVE_RX_STATS_REPORT_NUM) * + rx_stats_num = (GVE_RX_STATS_REPORT_NUM + NIC_RX_STATS_REPORT_NUM) * priv->rx_cfg.num_queues; priv->stats_report_len = sizeof(struct gve_stats_report) + (tx_stats_num + rx_stats_num) * From patchwork Fri Sep 11 17:38:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Awogbemila X-Patchwork-Id: 261035 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16A25C433E2 for ; Fri, 11 Sep 2020 17:39:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D02B7221E7 for ; Fri, 11 Sep 2020 17:39:58 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Fri, 11 Sep 2020 10:39:06 -0700 (PDT) Date: Fri, 11 Sep 2020 10:38:50 -0700 In-Reply-To: <20200911173851.2149095-1-awogbemila@google.com> Message-Id: <20200911173851.2149095-8-awogbemila@google.com> Mime-Version: 1.0 References: <20200911173851.2149095-1-awogbemila@google.com> X-Mailer: git-send-email 2.28.0.618.gf4bc123cb7-goog Subject: [PATCH net-next v4 7/8] gve: Use link status register to report link status From: David Awogbemila To: netdev@vger.kernel.org Cc: Patricio Noyola , Yangchun Fu , David Awogbemila Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Patricio Noyola This makes the driver better aware of the connectivity status of the device. Based on the device's status register, the driver can call netif_carrier_{on,off}. Reviewed-by: Yangchun Fu Signed-off-by: Patricio Noyola Signed-off-by: David Awogbemila --- drivers/net/ethernet/google/gve/gve_main.c | 24 +++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c index 28e5cc52410e..48a433154ce0 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -774,7 +774,7 @@ static int gve_open(struct net_device *dev) msecs_to_jiffies(priv->stats_report_timer_period))); gve_turnup(priv); - netif_carrier_on(dev); + queue_work(priv->gve_wq, &priv->service_task); priv->interface_up_cnt++; return 0; @@ -1032,16 +1032,34 @@ void gve_handle_report_stats(struct gve_priv *priv) } } +static void gve_handle_link_status(struct gve_priv *priv, bool link_status) +{ + if (!gve_get_napi_enabled(priv)) + return; + + if (link_status == netif_carrier_ok(priv->dev)) + return; + + if (link_status) { + netdev_info(priv->dev, "Device link is up.\n"); + netif_carrier_on(priv->dev); + } else { + netdev_info(priv->dev, "Device link is down.\n"); + netif_carrier_off(priv->dev); + } +} + /* Handle NIC status register changes, reset requests and report stats */ static void gve_service_task(struct work_struct *work) { struct gve_priv *priv = container_of(work, struct gve_priv, service_task); + u32 status = ioread32be(&priv->reg_bar0->device_status); - gve_handle_status(priv, - ioread32be(&priv->reg_bar0->device_status)); + gve_handle_status(priv, status); gve_handle_reset(priv); + gve_handle_link_status(priv, GVE_DEVICE_STATUS_LINK_STATUS_MASK & status); } static int gve_init_priv(struct gve_priv *priv, bool skip_describe_device)