diff options
author | David S. Miller <davem@davemloft.net> | 2024-03-04 13:03:32 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2024-03-04 13:03:32 +0300 |
commit | 19b427a403f2a12603a33d619bab937d57a72b06 (patch) | |
tree | dffd5962ac94893739707221e9355b35497eb8e2 | |
parent | 6752fb18dc5763e9d6efe5aebf03e4fc69e6086b (diff) | |
parent | 056a70924a0272718adfa37ffcfc1e1d426a0d7e (diff) | |
download | linux-19b427a403f2a12603a33d619bab937d57a72b06.tar.xz |
Merge branch 'net-gve-header-split-support'
Ziwei Xiao says:
====================
gve: Add header split support
Currently, the ethtool's ringparam has added a new field
tcp-data-split for enabling and disabling header split. These three
patches will utilize that ethtool flag to support header split in GVE
driver.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | drivers/net/ethernet/google/gve/gve.h | 27 | ||||
-rw-r--r-- | drivers/net/ethernet/google/gve/gve_adminq.c | 50 | ||||
-rw-r--r-- | drivers/net/ethernet/google/gve/gve_adminq.h | 20 | ||||
-rw-r--r-- | drivers/net/ethernet/google/gve/gve_ethtool.c | 62 | ||||
-rw-r--r-- | drivers/net/ethernet/google/gve/gve_main.c | 65 | ||||
-rw-r--r-- | drivers/net/ethernet/google/gve/gve_rx_dqo.c | 68 | ||||
-rw-r--r-- | drivers/net/ethernet/google/gve/gve_utils.c | 17 | ||||
-rw-r--r-- | drivers/net/ethernet/google/gve/gve_utils.h | 3 |
8 files changed, 277 insertions, 35 deletions
diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h index fd290f3ad6ec..4814c96d5fe7 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -9,6 +9,7 @@ #include <linux/dma-mapping.h> #include <linux/dmapool.h> +#include <linux/ethtool_netlink.h> #include <linux/netdevice.h> #include <linux/pci.h> #include <linux/u64_stats_sync.h> @@ -51,12 +52,16 @@ #define GVE_DEFAULT_RX_BUFFER_SIZE 2048 +#define GVE_MAX_RX_BUFFER_SIZE 4096 + #define GVE_DEFAULT_RX_BUFFER_OFFSET 2048 #define GVE_XDP_ACTIONS 5 #define GVE_GQ_TX_MIN_PKT_DESC_BYTES 182 +#define GVE_DEFAULT_HEADER_BUFFER_SIZE 128 + #define DQO_QPL_DEFAULT_TX_PAGES 512 #define DQO_QPL_DEFAULT_RX_PAGES 2048 @@ -150,6 +155,11 @@ struct gve_rx_compl_queue_dqo { u32 mask; /* Mask for indices to the size of the ring */ }; +struct gve_header_buf { + u8 *data; + dma_addr_t addr; +}; + /* Stores state for tracking buffers posted to HW */ struct gve_rx_buf_state_dqo { /* The page posted to HW. */ @@ -252,19 +262,26 @@ struct gve_rx_ring { /* track number of used buffers */ u16 used_buf_states_cnt; + + /* Address info of the buffers for header-split */ + struct gve_header_buf hdr_bufs; } dqo; }; u64 rbytes; /* free-running bytes received */ + u64 rx_hsplit_bytes; /* free-running header bytes received */ u64 rpackets; /* free-running packets received */ u32 cnt; /* free-running total number of completed packets */ u32 fill_cnt; /* free-running total number of descs and buffs posted */ u32 mask; /* masks the cnt and fill_cnt to the size of the ring */ + u64 rx_hsplit_pkt; /* free-running packets with headers split */ 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 */ + /* free-running count of unsplit packets due to header buffer overflow or hdr_len is 0 */ + u64 rx_hsplit_unsplit_pkt; u64 rx_cont_packet_cnt; /* free-running multi-fragment packets received */ u64 rx_frag_flip_cnt; /* free-running count of rx segments where page_flip was used */ u64 rx_frag_copy_cnt; /* free-running count of rx segments copied */ @@ -664,6 +681,7 @@ struct gve_rx_alloc_rings_cfg { struct gve_qpl_config *qpl_cfg; u16 ring_size; + u16 packet_buffer_size; bool raw_addressing; bool enable_header_split; @@ -778,13 +796,17 @@ struct gve_priv { struct gve_ptype_lut *ptype_lut_dqo; /* Must be a power of two. */ - int data_buffer_size_dqo; + u16 data_buffer_size_dqo; + u16 max_rx_buffer_size; /* device limit */ enum gve_queue_format queue_format; /* Interrupt coalescing settings */ u32 tx_coalesce_usecs; u32 rx_coalesce_usecs; + + u16 header_buf_size; /* device configured, header-split supported if non-zero */ + bool header_split_enabled; /* True if the header split is enabled by the user */ }; enum gve_service_task_flags_bit { @@ -1122,6 +1144,9 @@ 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); +u16 gve_get_pkt_buf_size(const struct gve_priv *priv, bool enable_hplit); +bool gve_header_split_supported(const struct gve_priv *priv); +int gve_set_hsplit_config(struct gve_priv *priv, u8 tcp_data_split); /* Reset */ void gve_schedule_reset(struct gve_priv *priv); int gve_reset(struct gve_priv *priv, bool attempt_teardown); diff --git a/drivers/net/ethernet/google/gve/gve_adminq.c b/drivers/net/ethernet/google/gve/gve_adminq.c index 12fbd723ecc6..ae12ac38e18b 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.c +++ b/drivers/net/ethernet/google/gve/gve_adminq.c @@ -40,7 +40,8 @@ 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) { u32 req_feat_mask = be32_to_cpu(option->required_features_mask); u16 option_length = be16_to_cpu(option->option_length); @@ -147,6 +148,23 @@ void gve_parse_device_option(struct gve_priv *priv, } *dev_op_jumbo_frames = (void *)(option + 1); break; + case GVE_DEV_OPT_ID_BUFFER_SIZES: + if (option_length < sizeof(**dev_op_buffer_sizes) || + req_feat_mask != GVE_DEV_OPT_REQ_FEAT_MASK_BUFFER_SIZES) { + dev_warn(&priv->pdev->dev, GVE_DEVICE_OPTION_ERROR_FMT, + "Buffer Sizes", + (int)sizeof(**dev_op_buffer_sizes), + GVE_DEV_OPT_REQ_FEAT_MASK_BUFFER_SIZES, + option_length, req_feat_mask); + break; + } + + if (option_length > sizeof(**dev_op_buffer_sizes)) + dev_warn(&priv->pdev->dev, + GVE_DEVICE_OPTION_TOO_BIG_FMT, + "Buffer Sizes"); + *dev_op_buffer_sizes = (void *)(option + 1); + break; default: /* If we don't recognize the option just continue * without doing anything. @@ -164,7 +182,8 @@ 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) { const int num_options = be16_to_cpu(descriptor->num_device_options); struct gve_device_option *dev_opt; @@ -185,7 +204,7 @@ 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_opt = next_opt; } @@ -640,6 +659,9 @@ static int gve_adminq_create_rx_queue(struct gve_priv *priv, u32 queue_index) cpu_to_be16(rx_buff_ring_entries); cmd.create_rx_queue.enable_rsc = !!(priv->dev->features & NETIF_F_LRO); + if (priv->header_split_enabled) + cmd.create_rx_queue.header_buffer_size = + cpu_to_be16(priv->header_buf_size); } return gve_adminq_issue_cmd(priv, &cmd); @@ -755,7 +777,9 @@ 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) { /* Before control reaches this point, the page-size-capped max MTU from * the gve_device_descriptor field has already been stored in @@ -779,10 +803,22 @@ static void gve_enable_supported_features(struct gve_priv *priv, if (priv->rx_pages_per_qpl == 0) priv->rx_pages_per_qpl = DQO_QPL_DEFAULT_RX_PAGES; } + + if (dev_op_buffer_sizes && + (supported_features_mask & GVE_SUP_BUFFER_SIZES_MASK)) { + priv->max_rx_buffer_size = + be16_to_cpu(dev_op_buffer_sizes->packet_buffer_size); + priv->header_buf_size = + be16_to_cpu(dev_op_buffer_sizes->header_buffer_size); + dev_info(&priv->pdev->dev, + "BUFFER SIZES device option enabled with max_rx_buffer_size of %u, header_buf_size of %u.\n", + priv->max_rx_buffer_size, priv->header_buf_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_gqi_rda *dev_op_gqi_rda = NULL; struct gve_device_option_gqi_qpl *dev_op_gqi_qpl = NULL; @@ -816,7 +852,8 @@ 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_dqo_qpl, + &dev_op_buffer_sizes); if (err) goto free_device_descriptor; @@ -885,7 +922,8 @@ int gve_adminq_describe_device(struct gve_priv *priv) 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); 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 5865ccdccbd0..5ac972e45ff8 100644 --- a/drivers/net/ethernet/google/gve/gve_adminq.h +++ b/drivers/net/ethernet/google/gve/gve_adminq.h @@ -125,6 +125,15 @@ 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); + /* Terminology: * * RDA - Raw DMA Addressing - Buffers associated with SKBs are directly DMA @@ -140,6 +149,7 @@ enum gve_dev_opt_id { 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_BUFFER_SIZES = 0xa, }; enum gve_dev_opt_req_feat_mask { @@ -149,10 +159,12 @@ enum gve_dev_opt_req_feat_mask { 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, }; enum gve_sup_feature_mask { GVE_SUP_JUMBO_FRAMES_MASK = 1 << 2, + GVE_SUP_BUFFER_SIZES_MASK = 1 << 4, }; #define GVE_DEV_OPT_LEN_GQI_RAW_ADDRESSING 0x0 @@ -165,6 +177,7 @@ enum gve_driver_capbility { gve_driver_capability_dqo_qpl = 2, /* reserved for future use */ gve_driver_capability_dqo_rda = 3, gve_driver_capability_alt_miss_compl = 4, + gve_driver_capability_flexible_buffer_size = 5, }; #define GVE_CAP1(a) BIT((int)a) @@ -176,7 +189,8 @@ enum gve_driver_capbility { (GVE_CAP1(gve_driver_capability_gqi_qpl) | \ GVE_CAP1(gve_driver_capability_gqi_rda) | \ GVE_CAP1(gve_driver_capability_dqo_rda) | \ - GVE_CAP1(gve_driver_capability_alt_miss_compl)) + GVE_CAP1(gve_driver_capability_alt_miss_compl) | \ + GVE_CAP1(gve_driver_capability_flexible_buffer_size)) #define GVE_DRIVER_CAPABILITY_FLAGS2 0x0 #define GVE_DRIVER_CAPABILITY_FLAGS3 0x0 @@ -260,7 +274,9 @@ struct gve_adminq_create_rx_queue { __be16 packet_buffer_size; __be16 rx_buff_ring_size; u8 enable_rsc; - u8 padding[5]; + u8 padding1; + __be16 header_buffer_size; + u8 padding2[2]; }; static_assert(sizeof(struct gve_adminq_create_rx_queue) == 56); diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c index e5397aa1e48f..9aebfb843d9d 100644 --- a/drivers/net/ethernet/google/gve/gve_ethtool.c +++ b/drivers/net/ethernet/google/gve/gve_ethtool.c @@ -4,7 +4,6 @@ * Copyright (C) 2015-2021 Google, Inc. */ -#include <linux/ethtool.h> #include <linux/rtnetlink.h> #include "gve.h" #include "gve_adminq.h" @@ -40,17 +39,18 @@ static u32 gve_get_msglevel(struct net_device *netdev) * as declared in enum xdp_action inside file uapi/linux/bpf.h . */ 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_packets", "rx_hsplit_pkt", "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", + "rx_hsplit_unsplit_pkt", "interface_up_cnt", "interface_down_cnt", "reset_cnt", "page_alloc_fail", "dma_mapping_error", "stats_report_trigger_cnt", }; static const char gve_gstrings_rx_stats[][ETH_GSTRING_LEN] = { - "rx_posted_desc[%u]", "rx_completed_desc[%u]", "rx_consumed_desc[%u]", "rx_bytes[%u]", - "rx_cont_packet_cnt[%u]", "rx_frag_flip_cnt[%u]", "rx_frag_copy_cnt[%u]", - "rx_frag_alloc_cnt[%u]", + "rx_posted_desc[%u]", "rx_completed_desc[%u]", "rx_consumed_desc[%u]", + "rx_bytes[%u]", "rx_hsplit_bytes[%u]", "rx_cont_packet_cnt[%u]", + "rx_frag_flip_cnt[%u]", "rx_frag_copy_cnt[%u]", "rx_frag_alloc_cnt[%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]", @@ -154,11 +154,13 @@ static void gve_get_ethtool_stats(struct net_device *netdev, struct ethtool_stats *stats, u64 *data) { - u64 tmp_rx_pkts, tmp_rx_bytes, tmp_rx_skb_alloc_fail, - tmp_rx_buf_alloc_fail, tmp_rx_desc_err_dropped_pkt, + u64 tmp_rx_pkts, tmp_rx_hsplit_pkt, tmp_rx_bytes, tmp_rx_hsplit_bytes, + tmp_rx_skb_alloc_fail, tmp_rx_buf_alloc_fail, + tmp_rx_desc_err_dropped_pkt, tmp_rx_hsplit_unsplit_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, tx_dropped; + u64 rx_buf_alloc_fail, rx_desc_err_dropped_pkt, rx_hsplit_unsplit_pkt, + rx_pkts, rx_hsplit_pkt, rx_skb_alloc_fail, rx_bytes, tx_pkts, tx_bytes, + tx_dropped; int stats_idx, base_stats_idx, max_stats_idx; struct stats *report_stats; int *rx_qid_to_stats_idx; @@ -185,8 +187,10 @@ gve_get_ethtool_stats(struct net_device *netdev, 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; + for (rx_pkts = 0, rx_bytes = 0, rx_hsplit_pkt = 0, + rx_skb_alloc_fail = 0, rx_buf_alloc_fail = 0, + rx_desc_err_dropped_pkt = 0, rx_hsplit_unsplit_pkt = 0, + ring = 0; ring < priv->rx_cfg.num_queues; ring++) { if (priv->rx) { do { @@ -195,18 +199,23 @@ gve_get_ethtool_stats(struct net_device *netdev, start = u64_stats_fetch_begin(&priv->rx[ring].statss); tmp_rx_pkts = rx->rpackets; + tmp_rx_hsplit_pkt = rx->rx_hsplit_pkt; 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; + tmp_rx_hsplit_unsplit_pkt = + rx->rx_hsplit_unsplit_pkt; } while (u64_stats_fetch_retry(&priv->rx[ring].statss, start)); rx_pkts += tmp_rx_pkts; + rx_hsplit_pkt += tmp_rx_hsplit_pkt; 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; + rx_hsplit_unsplit_pkt += tmp_rx_hsplit_unsplit_pkt; } } for (tx_pkts = 0, tx_bytes = 0, tx_dropped = 0, ring = 0; @@ -227,6 +236,7 @@ gve_get_ethtool_stats(struct net_device *netdev, i = 0; data[i++] = rx_pkts; + data[i++] = rx_hsplit_pkt; data[i++] = tx_pkts; data[i++] = rx_bytes; data[i++] = tx_bytes; @@ -238,6 +248,7 @@ gve_get_ethtool_stats(struct net_device *netdev, data[i++] = rx_skb_alloc_fail; data[i++] = rx_buf_alloc_fail; data[i++] = rx_desc_err_dropped_pkt; + data[i++] = rx_hsplit_unsplit_pkt; data[i++] = priv->interface_up_cnt; data[i++] = priv->interface_down_cnt; data[i++] = priv->reset_cnt; @@ -277,6 +288,7 @@ gve_get_ethtool_stats(struct net_device *netdev, start = u64_stats_fetch_begin(&priv->rx[ring].statss); tmp_rx_bytes = rx->rbytes; + tmp_rx_hsplit_bytes = rx->rx_hsplit_bytes; 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 = @@ -284,6 +296,7 @@ gve_get_ethtool_stats(struct net_device *netdev, } while (u64_stats_fetch_retry(&priv->rx[ring].statss, start)); data[i++] = tmp_rx_bytes; + data[i++] = tmp_rx_hsplit_bytes; data[i++] = rx->rx_cont_packet_cnt; data[i++] = rx->rx_frag_flip_cnt; data[i++] = rx->rx_frag_copy_cnt; @@ -480,6 +493,29 @@ static void gve_get_ringparam(struct net_device *netdev, cmd->tx_max_pending = priv->tx_desc_cnt; cmd->rx_pending = priv->rx_desc_cnt; cmd->tx_pending = priv->tx_desc_cnt; + + if (!gve_header_split_supported(priv)) + kernel_cmd->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_UNKNOWN; + else if (priv->header_split_enabled) + kernel_cmd->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_ENABLED; + else + kernel_cmd->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_DISABLED; +} + +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); + + if (priv->tx_desc_cnt != cmd->tx_pending || + priv->rx_desc_cnt != cmd->rx_pending) { + dev_info(&priv->pdev->dev, "Modify ring size is not supported.\n"); + return -EOPNOTSUPP; + } + + return gve_set_hsplit_config(priv, kernel_cmd->tcp_data_split); } static int gve_user_reset(struct net_device *netdev, u32 *flags) @@ -655,6 +691,7 @@ static int gve_set_coalesce(struct net_device *netdev, const struct ethtool_ops gve_ethtool_ops = { .supported_coalesce_params = ETHTOOL_COALESCE_USECS, + .supported_ring_params = ETHTOOL_RING_USE_TCP_DATA_SPLIT, .get_drvinfo = gve_get_drvinfo, .get_strings = gve_get_strings, .get_sset_count = gve_get_sset_count, @@ -667,6 +704,7 @@ 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 db6d9ae7cd78..7b89b66adb53 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -1307,9 +1307,13 @@ static void gve_rx_get_curr_alloc_cfg(struct gve_priv *priv, cfg->qcfg = &priv->rx_cfg; cfg->qcfg_tx = &priv->tx_cfg; cfg->raw_addressing = !gve_is_qpl(priv); + cfg->enable_header_split = priv->header_split_enabled; cfg->qpls = priv->qpls; cfg->qpl_cfg = &priv->qpl_cfg; cfg->ring_size = priv->rx_desc_cnt; + cfg->packet_buffer_size = gve_is_gqi(priv) ? + GVE_DEFAULT_RX_BUFFER_SIZE : + priv->data_buffer_size_dqo; cfg->rx = priv->rx; } @@ -1448,12 +1452,9 @@ static int gve_queues_start(struct gve_priv *priv, if (err) goto reset; - if (!gve_is_gqi(priv)) { - /* Hard code this for now. This may be tuned in the future for - * performance. - */ - priv->data_buffer_size_dqo = GVE_DEFAULT_RX_BUFFER_SIZE; - } + priv->header_split_enabled = rx_alloc_cfg->enable_header_split; + priv->data_buffer_size_dqo = rx_alloc_cfg->packet_buffer_size; + err = gve_create_rings(priv); if (err) goto reset; @@ -2065,6 +2066,56 @@ out: priv->tx_timeo_cnt++; } +u16 gve_get_pkt_buf_size(const struct gve_priv *priv, bool enable_hsplit) +{ + if (enable_hsplit && priv->max_rx_buffer_size >= GVE_MAX_RX_BUFFER_SIZE) + return GVE_MAX_RX_BUFFER_SIZE; + else + return GVE_DEFAULT_RX_BUFFER_SIZE; +} + +/* header-split is not supported on non-DQO_RDA yet even if device advertises it */ +bool gve_header_split_supported(const struct gve_priv *priv) +{ + return priv->header_buf_size && priv->queue_format == GVE_DQO_RDA_FORMAT; +} + +int gve_set_hsplit_config(struct gve_priv *priv, u8 tcp_data_split) +{ + 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}; + bool enable_hdr_split; + int err = 0; + + if (tcp_data_split == ETHTOOL_TCP_DATA_SPLIT_UNKNOWN) + return 0; + + if (!gve_header_split_supported(priv)) { + dev_err(&priv->pdev->dev, "Header-split not supported\n"); + return -EOPNOTSUPP; + } + + if (tcp_data_split == ETHTOOL_TCP_DATA_SPLIT_ENABLED) + enable_hdr_split = true; + else + enable_hdr_split = false; + + if (enable_hdr_split == priv->header_split_enabled) + return 0; + + gve_get_curr_alloc_cfgs(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + + rx_alloc_cfg.enable_header_split = enable_hdr_split; + rx_alloc_cfg.packet_buffer_size = gve_get_pkt_buf_size(priv, enable_hdr_split); + + if (netif_running(priv->dev)) + err = gve_adjust_config(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + return err; +} + static int gve_set_features(struct net_device *netdev, netdev_features_t features) { @@ -2511,6 +2562,8 @@ static int gve_probe(struct pci_dev *pdev, const struct pci_device_id *ent) priv->service_task_flags = 0x0; priv->state_flags = 0x0; priv->ethtool_flags = 0x0; + priv->data_buffer_size_dqo = GVE_DEFAULT_RX_BUFFER_SIZE; + priv->max_rx_buffer_size = GVE_DEFAULT_RX_BUFFER_SIZE; gve_set_probe_in_progress(priv); priv->gve_wq = alloc_ordered_workqueue("gve", 0); diff --git a/drivers/net/ethernet/google/gve/gve_rx_dqo.c b/drivers/net/ethernet/google/gve/gve_rx_dqo.c index 8e6aeb5b3ed4..8e8071308aeb 100644 --- a/drivers/net/ethernet/google/gve/gve_rx_dqo.c +++ b/drivers/net/ethernet/google/gve/gve_rx_dqo.c @@ -199,6 +199,18 @@ static int gve_alloc_page_dqo(struct gve_rx_ring *rx, return 0; } +static void gve_rx_free_hdr_bufs(struct gve_priv *priv, struct gve_rx_ring *rx) +{ + struct device *hdev = &priv->pdev->dev; + int buf_count = rx->dqo.bufq.mask + 1; + + if (rx->dqo.hdr_bufs.data) { + dma_free_coherent(hdev, priv->header_buf_size * buf_count, + rx->dqo.hdr_bufs.data, rx->dqo.hdr_bufs.addr); + rx->dqo.hdr_bufs.data = NULL; + } +} + void gve_rx_stop_ring_dqo(struct gve_priv *priv, int idx) { int ntfy_idx = gve_rx_idx_to_ntfy(priv, idx); @@ -258,9 +270,24 @@ static void gve_rx_free_ring_dqo(struct gve_priv *priv, struct gve_rx_ring *rx, kvfree(rx->dqo.buf_states); rx->dqo.buf_states = NULL; + gve_rx_free_hdr_bufs(priv, rx); + netif_dbg(priv, drv, priv->dev, "freed rx ring %d\n", idx); } +static int gve_rx_alloc_hdr_bufs(struct gve_priv *priv, struct gve_rx_ring *rx) +{ + struct device *hdev = &priv->pdev->dev; + int buf_count = rx->dqo.bufq.mask + 1; + + rx->dqo.hdr_bufs.data = dma_alloc_coherent(hdev, priv->header_buf_size * buf_count, + &rx->dqo.hdr_bufs.addr, GFP_KERNEL); + if (!rx->dqo.hdr_bufs.data) + return -ENOMEM; + + return 0; +} + void gve_rx_start_ring_dqo(struct gve_priv *priv, int idx) { int ntfy_idx = gve_rx_idx_to_ntfy(priv, idx); @@ -302,6 +329,11 @@ static int gve_rx_alloc_ring_dqo(struct gve_priv *priv, if (!rx->dqo.buf_states) return -ENOMEM; + /* Allocate header buffers for header-split */ + if (cfg->enable_header_split) + if (gve_rx_alloc_hdr_bufs(priv, rx)) + goto err; + /* Set up linked list of buffer IDs */ for (i = 0; i < rx->dqo.num_buf_states - 1; i++) rx->dqo.buf_states[i].next = i + 1; @@ -443,6 +475,10 @@ void gve_rx_post_buffers_dqo(struct gve_rx_ring *rx) desc->buf_id = cpu_to_le16(buf_state - rx->dqo.buf_states); desc->buf_addr = cpu_to_le64(buf_state->addr + buf_state->page_info.page_offset); + if (rx->dqo.hdr_bufs.data) + desc->header_buf_addr = + cpu_to_le64(rx->dqo.hdr_bufs.addr + + priv->header_buf_size * bufq->tail); bufq->tail = (bufq->tail + 1) & bufq->mask; complq->num_free_slots--; @@ -458,7 +494,7 @@ void gve_rx_post_buffers_dqo(struct gve_rx_ring *rx) static void gve_try_recycle_buf(struct gve_priv *priv, struct gve_rx_ring *rx, struct gve_rx_buf_state_dqo *buf_state) { - const int data_buffer_size = priv->data_buffer_size_dqo; + const u16 data_buffer_size = priv->data_buffer_size_dqo; int pagecount; /* Can't reuse if we only fit one buffer per page */ @@ -645,13 +681,16 @@ static int gve_rx_append_frags(struct napi_struct *napi, */ static int gve_rx_dqo(struct napi_struct *napi, struct gve_rx_ring *rx, const struct gve_rx_compl_desc_dqo *compl_desc, - int queue_idx) + u32 desc_idx, int queue_idx) { const u16 buffer_id = le16_to_cpu(compl_desc->buf_id); + const bool hbo = compl_desc->header_buffer_overflow; const bool eop = compl_desc->end_of_packet != 0; + const bool hsplit = compl_desc->split_header; struct gve_rx_buf_state_dqo *buf_state; struct gve_priv *priv = rx->gve; u16 buf_len; + u16 hdr_len; if (unlikely(buffer_id >= rx->dqo.num_buf_states)) { net_err_ratelimited("%s: Invalid RX buffer_id=%u\n", @@ -672,12 +711,35 @@ static int gve_rx_dqo(struct napi_struct *napi, struct gve_rx_ring *rx, } buf_len = compl_desc->packet_len; + hdr_len = compl_desc->header_len; /* Page might have not been used for awhile and was likely last written * by a different thread. */ prefetch(buf_state->page_info.page); + /* Copy the header into the skb in the case of header split */ + if (hsplit) { + int unsplit = 0; + + if (hdr_len && !hbo) { + rx->ctx.skb_head = gve_rx_copy_data(priv->dev, napi, + rx->dqo.hdr_bufs.data + + desc_idx * priv->header_buf_size, + hdr_len); + if (unlikely(!rx->ctx.skb_head)) + goto error; + rx->ctx.skb_tail = rx->ctx.skb_head; + } else { + unsplit = 1; + } + u64_stats_update_begin(&rx->statss); + rx->rx_hsplit_pkt++; + rx->rx_hsplit_unsplit_pkt += unsplit; + rx->rx_hsplit_bytes += hdr_len; + u64_stats_update_end(&rx->statss); + } + /* Sync the portion of dma buffer for CPU to read. */ dma_sync_single_range_for_cpu(&priv->pdev->dev, buf_state->addr, buf_state->page_info.page_offset, @@ -820,7 +882,7 @@ int gve_rx_poll_dqo(struct gve_notify_block *block, int budget) /* Do not read data until we own the descriptor */ dma_rmb(); - err = gve_rx_dqo(napi, rx, compl_desc, rx->q_num); + err = gve_rx_dqo(napi, rx, compl_desc, complq->head, rx->q_num); if (err < 0) { gve_rx_free_skb(rx); u64_stats_update_begin(&rx->statss); diff --git a/drivers/net/ethernet/google/gve/gve_utils.c b/drivers/net/ethernet/google/gve/gve_utils.c index 535b1796b91d..2349750075a5 100644 --- a/drivers/net/ethernet/google/gve/gve_utils.c +++ b/drivers/net/ethernet/google/gve/gve_utils.c @@ -64,11 +64,9 @@ void gve_rx_add_to_block(struct gve_priv *priv, int queue_idx) rx->ntfy_id = ntfy_idx; } -struct sk_buff *gve_rx_copy(struct net_device *dev, struct napi_struct *napi, - struct gve_rx_slot_page_info *page_info, u16 len) +struct sk_buff *gve_rx_copy_data(struct net_device *dev, struct napi_struct *napi, + u8 *data, u16 len) { - void *va = page_info->page_address + page_info->page_offset + - page_info->pad; struct sk_buff *skb; skb = napi_alloc_skb(napi, len); @@ -76,12 +74,21 @@ struct sk_buff *gve_rx_copy(struct net_device *dev, struct napi_struct *napi, return NULL; __skb_put(skb, len); - skb_copy_to_linear_data_offset(skb, 0, va, len); + skb_copy_to_linear_data_offset(skb, 0, data, len); skb->protocol = eth_type_trans(skb, dev); return skb; } +struct sk_buff *gve_rx_copy(struct net_device *dev, struct napi_struct *napi, + struct gve_rx_slot_page_info *page_info, u16 len) +{ + void *va = page_info->page_address + page_info->page_offset + + page_info->pad; + + return gve_rx_copy_data(dev, napi, va, len); +} + void gve_dec_pagecnt_bias(struct gve_rx_slot_page_info *page_info) { page_info->pagecnt_bias--; diff --git a/drivers/net/ethernet/google/gve/gve_utils.h b/drivers/net/ethernet/google/gve/gve_utils.h index 277921a629f7..bf2e9a0adb36 100644 --- a/drivers/net/ethernet/google/gve/gve_utils.h +++ b/drivers/net/ethernet/google/gve/gve_utils.h @@ -19,6 +19,9 @@ 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); +struct sk_buff *gve_rx_copy_data(struct net_device *dev, struct napi_struct *napi, + u8 *data, u16 len); + struct sk_buff *gve_rx_copy(struct net_device *dev, struct napi_struct *napi, struct gve_rx_slot_page_info *page_info, u16 len); |