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Message-ID: <20230811223938.997986-1-ziweixiao@google.com>
Date: Fri, 11 Aug 2023 15:39:38 -0700
From: Ziwei Xiao <ziweixiao@...gle.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, kuba@...nel.org,
Jeroen de Borst <jeroendb@...gle.com>, Praveen Kaligineedi <pkaligineedi@...gle.com>,
Ziwei Xiao <ziweixiao@...gle.com>
Subject: [PATCH net-next] gve: add header split support
From: Jeroen de Borst <jeroendb@...gle.com>
- Add device option to recive device's packet buffer size and header
buffer size. The driver will use the header-buffer size to determine
if header-split is on.
- A dma_pool is introduced for the header buffers. Header buffers are
always copied directly into the skb header and payload is always added
as a frag.
- Add header-split and strict-header-split ethtool priv flags. These
flags control header-split behavior. It can be turned on/off and it
can be set to 'strict' which will cause the driver to drop all the
packets that don't have a proper header split.
- Add max-rx-buffer-size priv flag to allow user to switch the packet
buffer size between max and default(e.g. 4K <-> 2K).
- Add reconfigure rx rings to support the header split and
max-rx-buffer-size enable/disable switch.
Signed-off-by: Jeroen de Borst <jeroendb@...gle.com>
Signed-off-by: Praveen Kaligineedi <pkaligineedi@...gle.com>
Signed-off-by: Ziwei Xiao <ziweixiao@...gle.com>
---
drivers/net/ethernet/google/gve/gve.h | 57 +++-
drivers/net/ethernet/google/gve/gve_adminq.c | 77 ++++-
drivers/net/ethernet/google/gve/gve_adminq.h | 19 +-
drivers/net/ethernet/google/gve/gve_dqo.h | 2 +
drivers/net/ethernet/google/gve/gve_ethtool.c | 111 ++++++--
drivers/net/ethernet/google/gve/gve_main.c | 197 ++++++++-----
drivers/net/ethernet/google/gve/gve_rx_dqo.c | 264 ++++++++++++++++--
drivers/net/ethernet/google/gve/gve_utils.c | 16 +-
drivers/net/ethernet/google/gve/gve_utils.h | 3 +
9 files changed, 621 insertions(+), 125 deletions(-)
diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h
index 0d1e681be250..b6f568f0b241 100644
--- a/drivers/net/ethernet/google/gve/gve.h
+++ b/drivers/net/ethernet/google/gve/gve.h
@@ -48,10 +48,17 @@
#define GVE_RX_BUFFER_SIZE_DQO 2048
+#define GVE_MIN_RX_BUFFER_SIZE 2048
+#define GVE_MAX_RX_BUFFER_SIZE 4096
+
#define GVE_XDP_ACTIONS 5
#define GVE_GQ_TX_MIN_PKT_DESC_BYTES 182
+#define GVE_HEADER_BUFFER_SIZE_MIN 64
+#define GVE_HEADER_BUFFER_SIZE_MAX 256
+#define GVE_HEADER_BUFFER_SIZE_DEFAULT 128
+
#define DQO_QPL_DEFAULT_TX_PAGES 512
#define DQO_QPL_DEFAULT_RX_PAGES 2048
@@ -145,6 +152,11 @@ 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. */
@@ -158,6 +170,9 @@ struct gve_rx_buf_state_dqo {
*/
u32 last_single_ref_offset;
+ /* Pointer to the header buffer when header-split is active */
+ struct gve_header_buf *hdr_buf;
+
/* Linked list index to next element in the list, or -1 if none */
s16 next;
};
@@ -247,19 +262,27 @@ struct gve_rx_ring {
/* track number of used buffers */
u16 used_buf_states_cnt;
+
+ /* Array of buffers for header-split */
+ struct gve_header_buf *hdr_bufs;
} dqo;
};
u64 rbytes; /* free-running bytes received */
+ u64 rheader_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_hsplit_hbo_pkt; /* free-running packets with header buffer overflow */
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 packets dropped by header-split overflow */
+ u64 rx_hsplit_err_dropped_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 */
@@ -711,6 +734,7 @@ struct gve_priv {
u64 stats_report_len;
dma_addr_t stats_report_bus; /* dma address for the stats report */
unsigned long ethtool_flags;
+ unsigned long ethtool_defaults; /* default flags */
unsigned long stats_report_timer_period;
struct timer_list stats_report_timer;
@@ -724,12 +748,20 @@ struct gve_priv {
/* Must be a power of two. */
int data_buffer_size_dqo;
+ int dev_max_rx_buffer_size; /* The max rx buffer size that device support*/
enum gve_queue_format queue_format;
/* Interrupt coalescing settings */
u32 tx_coalesce_usecs;
u32 rx_coalesce_usecs;
+
+ /* The size of buffers to allocate for the headers.
+ * A non-zero value enables header-split.
+ */
+ u16 header_buf_size;
+ u8 header_split_strict;
+ struct dma_pool *header_buf_pool;
};
enum gve_service_task_flags_bit {
@@ -747,9 +779,18 @@ enum gve_state_flags_bit {
};
enum gve_ethtool_flags_bit {
- GVE_PRIV_FLAGS_REPORT_STATS = 0,
+ GVE_PRIV_FLAGS_REPORT_STATS = 0,
+ GVE_PRIV_FLAGS_ENABLE_HEADER_SPLIT = 1,
+ GVE_PRIV_FLAGS_ENABLE_STRICT_HEADER_SPLIT = 2,
+ GVE_PRIV_FLAGS_ENABLE_MAX_RX_BUFFER_SIZE = 3,
};
+#define GVE_PRIV_FLAGS_MASK \
+ (BIT(GVE_PRIV_FLAGS_REPORT_STATS) | \
+ BIT(GVE_PRIV_FLAGS_ENABLE_HEADER_SPLIT) | \
+ BIT(GVE_PRIV_FLAGS_ENABLE_STRICT_HEADER_SPLIT) | \
+ BIT(GVE_PRIV_FLAGS_ENABLE_MAX_RX_BUFFER_SIZE))
+
static inline bool gve_get_do_reset(struct gve_priv *priv)
{
return test_bit(GVE_PRIV_FLAGS_DO_RESET, &priv->service_task_flags);
@@ -883,6 +924,16 @@ static inline void gve_clear_report_stats(struct gve_priv *priv)
clear_bit(GVE_PRIV_FLAGS_REPORT_STATS, &priv->ethtool_flags);
}
+static inline bool gve_get_enable_header_split(struct gve_priv *priv)
+{
+ return test_bit(GVE_PRIV_FLAGS_ENABLE_HEADER_SPLIT, &priv->ethtool_flags);
+}
+
+static inline bool gve_get_enable_max_rx_buffer_size(struct gve_priv *priv)
+{
+ return test_bit(GVE_PRIV_FLAGS_ENABLE_MAX_RX_BUFFER_SIZE, &priv->ethtool_flags);
+}
+
/* Returns the address of the ntfy_blocks irq doorbell
*/
static inline __be32 __iomem *gve_irq_doorbell(struct gve_priv *priv,
@@ -1056,6 +1107,10 @@ int gve_rx_poll(struct gve_notify_block *block, int budget);
bool gve_rx_work_pending(struct gve_rx_ring *rx);
int gve_rx_alloc_rings(struct gve_priv *priv);
void gve_rx_free_rings_gqi(struct gve_priv *priv);
+int gve_recreate_rx_rings(struct gve_priv *priv);
+int gve_reconfigure_rx_rings(struct gve_priv *priv,
+ bool enable_hdr_split,
+ int packet_buffer_size);
/* 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 79db7a6d42bc..ee4bdaef8e63 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 +148,26 @@ 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);
+ if ((*dev_op_buffer_sizes)->header_buffer_size)
+ priv->ethtool_defaults |= BIT(GVE_PRIV_FLAGS_ENABLE_HEADER_SPLIT);
+ break;
default:
/* If we don't recognize the option just continue
* without doing anything.
@@ -164,7 +185,8 @@ 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 +207,7 @@ 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;
}
@@ -610,6 +632,9 @@ 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 (rx->dqo.hdr_bufs)
+ cmd.create_rx_queue.header_buffer_size =
+ cpu_to_be16(priv->header_buf_size);
}
return gve_adminq_issue_cmd(priv, &cmd);
@@ -736,8 +761,12 @@ 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)
{
+ int buf_size;
+
/* Before control reaches this point, the page-size-capped max MTU from
* the gve_device_descriptor field has already been stored in
* priv->dev->max_mtu. We overwrite it with the true max MTU below.
@@ -760,10 +789,44 @@ 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;
}
+
+ priv->data_buffer_size_dqo = GVE_RX_BUFFER_SIZE_DQO;
+ priv->dev_max_rx_buffer_size = GVE_RX_BUFFER_SIZE_DQO;
+ priv->header_buf_size = 0;
+
+ if (dev_op_buffer_sizes &&
+ (supported_features_mask & GVE_SUP_BUFFER_SIZES_MASK)) {
+ dev_info(&priv->pdev->dev,
+ "BUFFER SIZES device option enabled.\n");
+ buf_size = be16_to_cpu(dev_op_buffer_sizes->packet_buffer_size);
+ if (buf_size) {
+ priv->dev_max_rx_buffer_size = buf_size;
+ if (priv->dev_max_rx_buffer_size &
+ (priv->dev_max_rx_buffer_size - 1))
+ priv->dev_max_rx_buffer_size = GVE_RX_BUFFER_SIZE_DQO;
+ if (priv->dev_max_rx_buffer_size < GVE_MIN_RX_BUFFER_SIZE)
+ priv->dev_max_rx_buffer_size = GVE_MIN_RX_BUFFER_SIZE;
+ if (priv->dev_max_rx_buffer_size > GVE_MAX_RX_BUFFER_SIZE)
+ priv->dev_max_rx_buffer_size = GVE_MAX_RX_BUFFER_SIZE;
+ }
+ buf_size = be16_to_cpu(dev_op_buffer_sizes->header_buffer_size);
+ if (buf_size) {
+ priv->header_buf_size = buf_size;
+ if (priv->header_buf_size & (priv->header_buf_size - 1))
+ priv->header_buf_size =
+ GVE_HEADER_BUFFER_SIZE_DEFAULT;
+ if (priv->header_buf_size < GVE_HEADER_BUFFER_SIZE_MIN)
+ priv->header_buf_size = GVE_HEADER_BUFFER_SIZE_MIN;
+ if (priv->header_buf_size > GVE_HEADER_BUFFER_SIZE_MAX)
+ priv->header_buf_size = GVE_HEADER_BUFFER_SIZE_MAX;
+ }
+ }
+
}
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;
@@ -796,7 +859,8 @@ 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;
@@ -865,7 +929,8 @@ 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_free_coherent(&priv->pdev->dev, PAGE_SIZE, descriptor,
diff --git a/drivers/net/ethernet/google/gve/gve_adminq.h b/drivers/net/ethernet/google/gve/gve_adminq.h
index 38a22279e863..1b3b67f74ef1 100644
--- a/drivers/net/ethernet/google/gve/gve_adminq.h
+++ b/drivers/net/ethernet/google/gve/gve_adminq.h
@@ -125,6 +125,14 @@ struct gve_device_option_jumbo_frames {
static_assert(sizeof(struct gve_device_option_jumbo_frames) == 8);
+struct gve_device_option_buffer_sizes {
+ __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 +148,7 @@ 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 +158,12 @@ 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 +176,7 @@ 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 +188,8 @@ 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
@@ -259,7 +272,9 @@ 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_dqo.h b/drivers/net/ethernet/google/gve/gve_dqo.h
index 1eb4d5fd8561..138aef23f732 100644
--- a/drivers/net/ethernet/google/gve/gve_dqo.h
+++ b/drivers/net/ethernet/google/gve/gve_dqo.h
@@ -39,10 +39,12 @@ int gve_tx_alloc_rings_dqo(struct gve_priv *priv);
void gve_tx_free_rings_dqo(struct gve_priv *priv);
int gve_rx_alloc_rings_dqo(struct gve_priv *priv);
void gve_rx_free_rings_dqo(struct gve_priv *priv);
+void gve_rx_reset_rings_dqo(struct gve_priv *priv);
int gve_clean_tx_done_dqo(struct gve_priv *priv, struct gve_tx_ring *tx,
struct napi_struct *napi);
void gve_rx_post_buffers_dqo(struct gve_rx_ring *rx);
void gve_rx_write_doorbell_dqo(const struct gve_priv *priv, int queue_idx);
+int gve_rx_handle_hdr_resources_dqo(struct gve_priv *priv, bool enable_hdr_split);
static inline void
gve_tx_put_doorbell_dqo(const struct gve_priv *priv,
diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c
index 233e5946905e..bcae140784cd 100644
--- a/drivers/net/ethernet/google/gve/gve_ethtool.c
+++ b/drivers/net/ethernet/google/gve/gve_ethtool.c
@@ -40,15 +40,17 @@ 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_packets_sph", "rx_packets_hbo", "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_err_dropped_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_posted_desc[%u]", "rx_completed_desc[%u]", "rx_consumed_desc[%u]",
+ "rx_bytes[%u]", "rx_header_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]",
@@ -77,7 +79,8 @@ static const char gve_gstrings_adminq_stats[][ETH_GSTRING_LEN] = {
};
static const char gve_gstrings_priv_flags[][ETH_GSTRING_LEN] = {
- "report-stats",
+ "report-stats", "enable-header-split", "enable-strict-header-split",
+ "enable-max-rx-buffer-size"
};
#define GVE_MAIN_STATS_LEN ARRAY_SIZE(gve_gstrings_main_stats)
@@ -154,11 +157,13 @@ 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_pkts_sph, tmp_rx_pkts_hbo, tmp_rx_bytes,
+ tmp_rx_hbytes, tmp_rx_skb_alloc_fail, tmp_rx_buf_alloc_fail,
+ tmp_rx_desc_err_dropped_pkt, tmp_rx_hsplit_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, tx_dropped;
+ u64 rx_buf_alloc_fail, rx_desc_err_dropped_pkt, rx_hsplit_err_dropped_pkt,
+ rx_pkts, rx_pkts_sph, rx_pkts_hbo, 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 +190,10 @@ 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_pkts_sph = 0, rx_pkts_hbo = 0,
+ rx_skb_alloc_fail = 0, rx_buf_alloc_fail = 0,
+ rx_desc_err_dropped_pkt = 0, rx_hsplit_err_dropped_pkt = 0,
+ ring = 0;
ring < priv->rx_cfg.num_queues; ring++) {
if (priv->rx) {
do {
@@ -195,18 +202,25 @@ gve_get_ethtool_stats(struct net_device *netdev,
start =
u64_stats_fetch_begin(&priv->rx[ring].statss);
tmp_rx_pkts = rx->rpackets;
+ tmp_rx_pkts_sph = rx->rx_hsplit_pkt;
+ tmp_rx_pkts_hbo = rx->rx_hsplit_hbo_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_err_dropped_pkt =
+ rx->rx_hsplit_err_dropped_pkt;
} while (u64_stats_fetch_retry(&priv->rx[ring].statss,
start));
rx_pkts += tmp_rx_pkts;
+ rx_pkts_sph += tmp_rx_pkts_sph;
+ rx_pkts_hbo += tmp_rx_pkts_hbo;
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_err_dropped_pkt += tmp_rx_hsplit_err_dropped_pkt;
}
}
for (tx_pkts = 0, tx_bytes = 0, tx_dropped = 0, ring = 0;
@@ -227,6 +241,8 @@ gve_get_ethtool_stats(struct net_device *netdev,
i = 0;
data[i++] = rx_pkts;
+ data[i++] = rx_pkts_sph;
+ data[i++] = rx_pkts_hbo;
data[i++] = tx_pkts;
data[i++] = rx_bytes;
data[i++] = tx_bytes;
@@ -238,6 +254,7 @@ 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_err_dropped_pkt;
data[i++] = priv->interface_up_cnt;
data[i++] = priv->interface_down_cnt;
data[i++] = priv->reset_cnt;
@@ -277,6 +294,7 @@ gve_get_ethtool_stats(struct net_device *netdev,
start =
u64_stats_fetch_begin(&priv->rx[ring].statss);
tmp_rx_bytes = rx->rbytes;
+ tmp_rx_hbytes = rx->rheader_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 +302,7 @@ 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_hbytes;
data[i++] = rx->rx_cont_packet_cnt;
data[i++] = rx->rx_frag_flip_cnt;
data[i++] = rx->rx_frag_copy_cnt;
@@ -535,30 +554,72 @@ 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;
+ return priv->ethtool_flags & GVE_PRIV_FLAGS_MASK;
}
static int gve_set_priv_flags(struct net_device *netdev, u32 flags)
{
struct gve_priv *priv = netdev_priv(netdev);
- u64 ori_flags, new_flags;
+ u64 ori_flags, new_flags, flag_diff;
int num_tx_queues;
+ int new_packet_buffer_size;
num_tx_queues = gve_num_tx_queues(priv);
+
+ /* If turning off header split, strict header split will be turned off too*/
+ if (gve_get_enable_header_split(priv) &&
+ !(flags & BIT(GVE_PRIV_FLAGS_ENABLE_HEADER_SPLIT))) {
+ flags &= ~BIT(GVE_PRIV_FLAGS_ENABLE_HEADER_SPLIT);
+ flags &= ~BIT(GVE_PRIV_FLAGS_ENABLE_STRICT_HEADER_SPLIT);
+ }
+
+ /* If strict header-split is requested, turn on regular header-split */
+ if (flags & BIT(GVE_PRIV_FLAGS_ENABLE_STRICT_HEADER_SPLIT))
+ flags |= BIT(GVE_PRIV_FLAGS_ENABLE_HEADER_SPLIT);
+
+ /* Make sure header-split is available */
+ if ((flags & BIT(GVE_PRIV_FLAGS_ENABLE_HEADER_SPLIT)) &&
+ !(priv->ethtool_defaults & BIT(GVE_PRIV_FLAGS_ENABLE_HEADER_SPLIT))) {
+ dev_err(&priv->pdev->dev,
+ "Header-split not available\n");
+ return -EINVAL;
+ }
+
+ if ((flags & BIT(GVE_PRIV_FLAGS_ENABLE_MAX_RX_BUFFER_SIZE)) &&
+ priv->dev_max_rx_buffer_size <= GVE_MIN_RX_BUFFER_SIZE) {
+ dev_err(&priv->pdev->dev,
+ "Max-rx-buffer-size not available\n");
+ return -EINVAL;
+ }
+
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));
+ new_flags = flags & GVE_PRIV_FLAGS_MASK;
+
+ flag_diff = new_flags ^ ori_flags;
+
+ if ((flag_diff & BIT(GVE_PRIV_FLAGS_ENABLE_HEADER_SPLIT)) ||
+ (flag_diff & BIT(GVE_PRIV_FLAGS_ENABLE_MAX_RX_BUFFER_SIZE))) {
+ bool enable_hdr_split =
+ new_flags & BIT(GVE_PRIV_FLAGS_ENABLE_HEADER_SPLIT);
+ bool enable_max_buffer_size =
+ new_flags & BIT(GVE_PRIV_FLAGS_ENABLE_MAX_RX_BUFFER_SIZE);
+ int err;
+
+ if (enable_max_buffer_size)
+ new_packet_buffer_size = priv->dev_max_rx_buffer_size;
+ else
+ new_packet_buffer_size = GVE_RX_BUFFER_SIZE_DQO;
+
+ err = gve_reconfigure_rx_rings(priv,
+ enable_hdr_split,
+ new_packet_buffer_size);
+ if (err)
+ return err;
+ }
+
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,
@@ -577,6 +638,10 @@ static int gve_set_priv_flags(struct net_device *netdev, u32 flags)
sizeof(struct stats));
del_timer_sync(&priv->stats_report_timer);
}
+ priv->header_split_strict =
+ (priv->ethtool_flags &
+ BIT(GVE_PRIV_FLAGS_ENABLE_STRICT_HEADER_SPLIT)) ? true : false;
+
return 0;
}
diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c
index 5704b5f57cd0..93443784c3cf 100644
--- a/drivers/net/ethernet/google/gve/gve_main.c
+++ b/drivers/net/ethernet/google/gve/gve_main.c
@@ -688,45 +688,11 @@ static int gve_unregister_qpls(struct gve_priv *priv)
return 0;
}
-static int gve_create_xdp_rings(struct gve_priv *priv)
-{
- int err;
-
- err = gve_adminq_create_tx_queues(priv,
- gve_xdp_tx_start_queue_id(priv),
- priv->num_xdp_queues);
- if (err) {
- netif_err(priv, drv, priv->dev, "failed to create %d XDP tx queues\n",
- priv->num_xdp_queues);
- /* This failure will trigger a reset - no need to clean
- * up
- */
- return err;
- }
- netif_dbg(priv, drv, priv->dev, "created %d XDP tx queues\n",
- priv->num_xdp_queues);
-
- return 0;
-}
-
-static int gve_create_rings(struct gve_priv *priv)
+static int gve_create_rx_rings(struct gve_priv *priv)
{
- int num_tx_queues = gve_num_tx_queues(priv);
int err;
int i;
- err = gve_adminq_create_tx_queues(priv, 0, num_tx_queues);
- if (err) {
- netif_err(priv, drv, priv->dev, "failed to create %d tx queues\n",
- num_tx_queues);
- /* This failure will trigger a reset - no need to clean
- * up
- */
- return err;
- }
- netif_dbg(priv, drv, priv->dev, "created %d tx queues\n",
- num_tx_queues);
-
err = gve_adminq_create_rx_queues(priv, priv->rx_cfg.num_queues);
if (err) {
netif_err(priv, drv, priv->dev, "failed to create %d rx queues\n",
@@ -758,6 +724,50 @@ static int gve_create_rings(struct gve_priv *priv)
return 0;
}
+static int gve_create_tx_rings(struct gve_priv *priv, int start_id, u32 num_tx_queues)
+{
+ int err;
+
+ err = gve_adminq_create_tx_queues(priv, start_id, num_tx_queues);
+ if (err) {
+ netif_err(priv, drv, priv->dev, "failed to create %d tx queues\n",
+ num_tx_queues);
+ /* This failure will trigger a reset - no need to clean
+ * up
+ */
+ return err;
+ }
+ netif_dbg(priv, drv, priv->dev, "created %d tx queues\n",
+ num_tx_queues);
+
+ return 0;
+}
+
+static int gve_create_xdp_rings(struct gve_priv *priv)
+{
+ int err;
+
+ err = gve_create_tx_rings(priv,
+ gve_xdp_tx_start_queue_id(priv),
+ priv->num_xdp_queues);
+
+ return err;
+}
+
+static int gve_create_rings(struct gve_priv *priv)
+{
+ int num_tx_queues = gve_num_tx_queues(priv);
+ int err;
+
+ err = gve_create_tx_rings(priv, 0, num_tx_queues);
+ if (err)
+ return err;
+
+ err = gve_create_rx_rings(priv);
+
+ return err;
+}
+
static void add_napi_init_xdp_sync_stats(struct gve_priv *priv,
int (*napi_poll)(struct napi_struct *napi,
int budget))
@@ -875,32 +885,27 @@ static int gve_alloc_rings(struct gve_priv *priv)
return err;
}
-static int gve_destroy_xdp_rings(struct gve_priv *priv)
+static int gve_destroy_rx_rings(struct gve_priv *priv)
{
- int start_id;
int err;
- start_id = gve_xdp_tx_start_queue_id(priv);
- err = gve_adminq_destroy_tx_queues(priv,
- start_id,
- priv->num_xdp_queues);
+ err = gve_adminq_destroy_rx_queues(priv, priv->rx_cfg.num_queues);
if (err) {
netif_err(priv, drv, priv->dev,
- "failed to destroy XDP queues\n");
+ "failed to destroy rx queues\n");
/* This failure will trigger a reset - no need to clean up */
return err;
}
- netif_dbg(priv, drv, priv->dev, "destroyed XDP queues\n");
+ netif_dbg(priv, drv, priv->dev, "destroyed rx queues\n");
return 0;
}
-static int gve_destroy_rings(struct gve_priv *priv)
+static int gve_destroy_tx_rings(struct gve_priv *priv, int start_id, u32 num_queues)
{
- int num_tx_queues = gve_num_tx_queues(priv);
int err;
- err = gve_adminq_destroy_tx_queues(priv, 0, num_tx_queues);
+ err = gve_adminq_destroy_tx_queues(priv, start_id, num_queues);
if (err) {
netif_err(priv, drv, priv->dev,
"failed to destroy tx queues\n");
@@ -908,14 +913,35 @@ static int gve_destroy_rings(struct gve_priv *priv)
return err;
}
netif_dbg(priv, drv, priv->dev, "destroyed tx queues\n");
- err = gve_adminq_destroy_rx_queues(priv, priv->rx_cfg.num_queues);
- if (err) {
- netif_err(priv, drv, priv->dev,
- "failed to destroy rx queues\n");
- /* This failure will trigger a reset - no need to clean up */
+
+ return 0;
+}
+
+static int gve_destroy_xdp_rings(struct gve_priv *priv)
+{
+ int start_id;
+ int err;
+
+ start_id = gve_xdp_tx_start_queue_id(priv);
+ err = gve_destroy_tx_rings(priv,
+ start_id,
+ priv->num_xdp_queues);
+
+ return err;
+}
+
+static int gve_destroy_rings(struct gve_priv *priv)
+{
+ int num_tx_queues = gve_num_tx_queues(priv);
+ int err;
+
+ err = gve_destroy_tx_rings(priv, 0, num_tx_queues);
+ if (err)
+ return err;
+
+ err = gve_destroy_rx_rings(priv);
+ if (err)
return err;
- }
- netif_dbg(priv, drv, priv->dev, "destroyed rx queues\n");
return 0;
}
@@ -1306,12 +1332,6 @@ static int gve_open(struct net_device *dev)
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_RX_BUFFER_SIZE_DQO;
- }
err = gve_create_rings(priv);
if (err)
goto reset;
@@ -1457,12 +1477,64 @@ static void gve_handle_link_status(struct gve_priv *priv, bool link_status)
}
}
+static void gve_turnup_and_check_status(struct gve_priv *priv)
+{
+ u32 status;
+
+ gve_turnup(priv);
+ status = ioread32be(&priv->reg_bar0->device_status);
+ gve_handle_link_status(priv, GVE_DEVICE_STATUS_LINK_STATUS_MASK & status);
+}
+
+int gve_recreate_rx_rings(struct gve_priv *priv)
+{
+ int err;
+
+ /* Unregister queues with the device*/
+ err = gve_destroy_rx_rings(priv);
+ if (err)
+ return err;
+
+ /* Reset the RX state */
+ gve_rx_reset_rings_dqo(priv);
+
+ /* Register queues with the device */
+ return gve_create_rx_rings(priv);
+}
+
+int gve_reconfigure_rx_rings(struct gve_priv *priv,
+ bool enable_hdr_split,
+ int packet_buffer_size)
+{
+ int err = 0;
+
+ if (priv->queue_format != GVE_DQO_RDA_FORMAT)
+ return -EOPNOTSUPP;
+
+ gve_turndown(priv);
+
+ /* Allocate/free hdr resources */
+ if (enable_hdr_split != !!priv->header_buf_pool) {
+ err = gve_rx_handle_hdr_resources_dqo(priv, enable_hdr_split);
+ if (err)
+ goto err;
+ }
+
+ /* Apply new RX configuration changes */
+ priv->data_buffer_size_dqo = packet_buffer_size;
+
+ /* Reset RX state and re-register with the device */
+ err = gve_recreate_rx_rings(priv);
+err:
+ gve_turnup_and_check_status(priv);
+ return err;
+}
+
static int gve_set_xdp(struct gve_priv *priv, struct bpf_prog *prog,
struct netlink_ext_ack *extack)
{
struct bpf_prog *old_prog;
int err = 0;
- u32 status;
old_prog = READ_ONCE(priv->xdp_prog);
if (!netif_carrier_ok(priv->dev)) {
@@ -1491,9 +1563,7 @@ static int gve_set_xdp(struct gve_priv *priv, struct bpf_prog *prog,
bpf_prog_put(old_prog);
out:
- gve_turnup(priv);
- status = ioread32be(&priv->reg_bar0->device_status);
- gve_handle_link_status(priv, GVE_DEVICE_STATUS_LINK_STATUS_MASK & status);
+ gve_turnup_and_check_status(priv);
return err;
}
@@ -2278,6 +2348,7 @@ 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->ethtool_defaults = 0x0;
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 ea0e38b4d9e9..b3974a91dc94 100644
--- a/drivers/net/ethernet/google/gve/gve_rx_dqo.c
+++ b/drivers/net/ethernet/google/gve/gve_rx_dqo.c
@@ -111,6 +111,13 @@ static void gve_enqueue_buf_state(struct gve_rx_ring *rx,
}
}
+static void gve_recycle_buf(struct gve_rx_ring *rx,
+ struct gve_rx_buf_state_dqo *buf_state)
+{
+ buf_state->hdr_buf = NULL;
+ gve_enqueue_buf_state(rx, &rx->dqo.recycled_buf_states, buf_state);
+}
+
static struct gve_rx_buf_state_dqo *
gve_get_recycled_buf_state(struct gve_rx_ring *rx)
{
@@ -199,6 +206,23 @@ static int gve_alloc_page_dqo(struct gve_rx_ring *rx,
return 0;
}
+static void gve_rx_free_hdr_bufs(struct gve_priv *priv, int idx)
+{
+ struct gve_rx_ring *rx = &priv->rx[idx];
+ int buffer_queue_slots = rx->dqo.bufq.mask + 1;
+ int i;
+
+ if (rx->dqo.hdr_bufs) {
+ for (i = 0; i < buffer_queue_slots; i++)
+ if (rx->dqo.hdr_bufs[i].data)
+ dma_pool_free(priv->header_buf_pool,
+ rx->dqo.hdr_bufs[i].data,
+ rx->dqo.hdr_bufs[i].addr);
+ kvfree(rx->dqo.hdr_bufs);
+ rx->dqo.hdr_bufs = NULL;
+ }
+}
+
static void gve_rx_free_ring_dqo(struct gve_priv *priv, int idx)
{
struct gve_rx_ring *rx = &priv->rx[idx];
@@ -248,15 +272,99 @@ static void gve_rx_free_ring_dqo(struct gve_priv *priv, int idx)
kvfree(rx->dqo.buf_states);
rx->dqo.buf_states = NULL;
+ gve_rx_free_hdr_bufs(priv, idx);
+
netif_dbg(priv, drv, priv->dev, "freed rx ring %d\n", idx);
}
+static int gve_rx_alloc_hdr_bufs(struct gve_priv *priv, int idx)
+{
+ struct gve_rx_ring *rx = &priv->rx[idx];
+ int buffer_queue_slots = rx->dqo.bufq.mask + 1;
+ int i;
+
+ rx->dqo.hdr_bufs = kvcalloc(buffer_queue_slots,
+ sizeof(rx->dqo.hdr_bufs[0]),
+ GFP_KERNEL);
+ if (!rx->dqo.hdr_bufs)
+ return -ENOMEM;
+ for (i = 0; i < buffer_queue_slots; i++) {
+ rx->dqo.hdr_bufs[i].data =
+ dma_pool_alloc(priv->header_buf_pool,
+ GFP_KERNEL,
+ &rx->dqo.hdr_bufs[i].addr);
+ if (!rx->dqo.hdr_bufs[i].data)
+ goto err;
+ }
+ return 0;
+err:
+ gve_rx_free_hdr_bufs(priv, idx);
+ return -ENOMEM;
+}
+
+static void gve_rx_init_ring_state_dqo(struct gve_rx_ring *rx,
+ const u32 buffer_queue_slots,
+ const u32 completion_queue_slots)
+{
+ int i;
+ /* Set buffer queue state */
+ rx->dqo.bufq.mask = buffer_queue_slots - 1;
+ rx->dqo.bufq.head = 0;
+ rx->dqo.bufq.tail = 0;
+ /* Set completion queue state */
+ rx->dqo.complq.num_free_slots = completion_queue_slots;
+ rx->dqo.complq.mask = completion_queue_slots - 1;
+ rx->dqo.complq.cur_gen_bit = 0;
+ rx->dqo.complq.head = 0;
+ /* Set RX SKB context */
+ rx->ctx.skb_head = NULL;
+ rx->ctx.skb_tail = NULL;
+ /* 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;
+ rx->dqo.buf_states[rx->dqo.num_buf_states - 1].next = -1;
+ rx->dqo.free_buf_states = 0;
+ rx->dqo.recycled_buf_states.head = -1;
+ rx->dqo.recycled_buf_states.tail = -1;
+ rx->dqo.used_buf_states.head = -1;
+ rx->dqo.used_buf_states.tail = -1;
+}
+
+static void gve_rx_reset_ring_dqo(struct gve_priv *priv, int idx)
+{
+ struct gve_rx_ring *rx = &priv->rx[idx];
+ size_t size;
+ int i;
+ const u32 buffer_queue_slots = priv->rx_desc_cnt;
+ const u32 completion_queue_slots = priv->rx_desc_cnt;
+
+ netif_dbg(priv, drv, priv->dev, "Resetting rx ring\n");
+ /* Reset buffer queue */
+ size = sizeof(rx->dqo.bufq.desc_ring[0]) *
+ buffer_queue_slots;
+ memset(rx->dqo.bufq.desc_ring, 0, size);
+ /* Reset completion queue */
+ size = sizeof(rx->dqo.complq.desc_ring[0]) *
+ completion_queue_slots;
+ memset(rx->dqo.complq.desc_ring, 0, size);
+ /* Reset q_resources */
+ memset(rx->q_resources, 0, sizeof(*rx->q_resources));
+ /* Reset buf states */
+ for (i = 0; i < rx->dqo.num_buf_states; i++) {
+ struct gve_rx_buf_state_dqo *bs = &rx->dqo.buf_states[i];
+
+ if (bs->page_info.page)
+ gve_free_page_dqo(priv, bs, !rx->dqo.qpl);
+ }
+ gve_rx_init_ring_state_dqo(rx, buffer_queue_slots,
+ completion_queue_slots);
+}
+
static int gve_rx_alloc_ring_dqo(struct gve_priv *priv, int idx)
{
struct gve_rx_ring *rx = &priv->rx[idx];
struct device *hdev = &priv->pdev->dev;
size_t size;
- int i;
const u32 buffer_queue_slots =
priv->queue_format == GVE_DQO_RDA_FORMAT ?
@@ -268,11 +376,6 @@ static int gve_rx_alloc_ring_dqo(struct gve_priv *priv, int idx)
memset(rx, 0, sizeof(*rx));
rx->gve = priv;
rx->q_num = idx;
- rx->dqo.bufq.mask = buffer_queue_slots - 1;
- rx->dqo.complq.num_free_slots = completion_queue_slots;
- rx->dqo.complq.mask = completion_queue_slots - 1;
- rx->ctx.skb_head = NULL;
- rx->ctx.skb_tail = NULL;
rx->dqo.num_buf_states = priv->queue_format == GVE_DQO_RDA_FORMAT ?
min_t(s16, S16_MAX, buffer_queue_slots * 4) :
@@ -283,16 +386,6 @@ static int gve_rx_alloc_ring_dqo(struct gve_priv *priv, int idx)
if (!rx->dqo.buf_states)
return -ENOMEM;
- /* 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;
-
- rx->dqo.buf_states[rx->dqo.num_buf_states - 1].next = -1;
- rx->dqo.recycled_buf_states.head = -1;
- rx->dqo.recycled_buf_states.tail = -1;
- rx->dqo.used_buf_states.head = -1;
- rx->dqo.used_buf_states.tail = -1;
-
/* Allocate RX completion queue */
size = sizeof(rx->dqo.complq.desc_ring[0]) *
completion_queue_slots;
@@ -320,6 +413,14 @@ static int gve_rx_alloc_ring_dqo(struct gve_priv *priv, int idx)
if (!rx->q_resources)
goto err;
+ gve_rx_init_ring_state_dqo(rx, buffer_queue_slots,
+ completion_queue_slots);
+
+ /* Allocate header buffers for header-split */
+ if (priv->header_buf_pool)
+ if (gve_rx_alloc_hdr_bufs(priv, idx))
+ goto err;
+
gve_rx_add_to_block(priv, idx);
return 0;
@@ -337,10 +438,28 @@ void gve_rx_write_doorbell_dqo(const struct gve_priv *priv, int queue_idx)
iowrite32(rx->dqo.bufq.tail, &priv->db_bar2[index]);
}
+static int gve_rx_alloc_hdr_buf_pool(struct gve_priv *priv)
+{
+ priv->header_buf_pool = dma_pool_create("header_bufs",
+ &priv->pdev->dev,
+ priv->header_buf_size,
+ 64, 0);
+ if (!priv->header_buf_pool)
+ return -ENOMEM;
+
+ return 0;
+}
+
int gve_rx_alloc_rings_dqo(struct gve_priv *priv)
{
int err = 0;
- int i;
+ int i = 0;
+
+ if (gve_get_enable_header_split(priv)) {
+ err = gve_rx_alloc_hdr_buf_pool(priv);
+ if (err)
+ goto err;
+ }
for (i = 0; i < priv->rx_cfg.num_queues; i++) {
err = gve_rx_alloc_ring_dqo(priv, i);
@@ -361,12 +480,23 @@ int gve_rx_alloc_rings_dqo(struct gve_priv *priv)
return err;
}
+void gve_rx_reset_rings_dqo(struct gve_priv *priv)
+{
+ int i;
+
+ for (i = 0; i < priv->rx_cfg.num_queues; i++)
+ gve_rx_reset_ring_dqo(priv, i);
+}
+
void gve_rx_free_rings_dqo(struct gve_priv *priv)
{
int i;
for (i = 0; i < priv->rx_cfg.num_queues; i++)
gve_rx_free_ring_dqo(priv, i);
+
+ dma_pool_destroy(priv->header_buf_pool);
+ priv->header_buf_pool = NULL;
}
void gve_rx_post_buffers_dqo(struct gve_rx_ring *rx)
@@ -404,6 +534,12 @@ 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) {
+ struct gve_header_buf *hdr_buf =
+ &rx->dqo.hdr_bufs[bufq->tail];
+ buf_state->hdr_buf = hdr_buf;
+ desc->header_buf_addr = cpu_to_le64(hdr_buf->addr);
+ }
bufq->tail = (bufq->tail + 1) & bufq->mask;
complq->num_free_slots--;
@@ -450,7 +586,7 @@ static void gve_try_recycle_buf(struct gve_priv *priv, struct gve_rx_ring *rx,
goto mark_used;
}
- gve_enqueue_buf_state(rx, &rx->dqo.recycled_buf_states, buf_state);
+ gve_recycle_buf(rx, buf_state);
return;
mark_used:
@@ -606,10 +742,13 @@ static int gve_rx_dqo(struct napi_struct *napi, struct gve_rx_ring *rx,
int queue_idx)
{
const u16 buffer_id = le16_to_cpu(compl_desc->buf_id);
+ const bool hbo = compl_desc->header_buffer_overflow != 0;
const bool eop = compl_desc->end_of_packet != 0;
+ const bool sph = compl_desc->split_header != 0;
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",
@@ -624,18 +763,55 @@ static int gve_rx_dqo(struct napi_struct *napi, struct gve_rx_ring *rx,
}
if (unlikely(compl_desc->rx_error)) {
- gve_enqueue_buf_state(rx, &rx->dqo.recycled_buf_states,
- buf_state);
+ net_err_ratelimited("%s: Descriptor error=%u\n",
+ priv->dev->name, compl_desc->rx_error);
+ gve_recycle_buf(rx, buf_state);
return -EINVAL;
}
buf_len = compl_desc->packet_len;
+ hdr_len = compl_desc->header_len;
+
+ if (unlikely(hbo && priv->header_split_strict)) {
+ gve_recycle_buf(rx, buf_state);
+ return -EFAULT;
+ }
/* 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 (sph) {
+ if (unlikely(!hdr_len)) {
+ gve_recycle_buf(rx, buf_state);
+ return -EINVAL;
+ }
+
+ if (unlikely(!buf_state->hdr_buf)) {
+ gve_recycle_buf(rx, buf_state);
+ return -EINVAL;
+ }
+ dma_sync_single_for_cpu(&priv->pdev->dev,
+ buf_state->hdr_buf->addr,
+ hdr_len, DMA_FROM_DEVICE);
+
+ rx->ctx.skb_head = gve_rx_copy_data(priv->dev, napi,
+ buf_state->hdr_buf->data,
+ hdr_len);
+ if (unlikely(!rx->ctx.skb_head))
+ goto error;
+
+ rx->ctx.skb_tail = rx->ctx.skb_head;
+
+ u64_stats_update_begin(&rx->statss);
+ rx->rx_hsplit_pkt++;
+ rx->rx_hsplit_hbo_pkt += hbo;
+ rx->rheader_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,
@@ -644,9 +820,8 @@ static int gve_rx_dqo(struct napi_struct *napi, struct gve_rx_ring *rx,
/* Append to current skb if one exists. */
if (rx->ctx.skb_head) {
if (unlikely(gve_rx_append_frags(napi, buf_state, buf_len, rx,
- priv)) != 0) {
+ priv)) != 0)
goto error;
- }
return 0;
}
@@ -662,8 +837,7 @@ static int gve_rx_dqo(struct napi_struct *napi, struct gve_rx_ring *rx,
rx->rx_copybreak_pkt++;
u64_stats_update_end(&rx->statss);
- gve_enqueue_buf_state(rx, &rx->dqo.recycled_buf_states,
- buf_state);
+ gve_recycle_buf(rx, buf_state);
return 0;
}
@@ -687,7 +861,9 @@ static int gve_rx_dqo(struct napi_struct *napi, struct gve_rx_ring *rx,
return 0;
error:
- gve_enqueue_buf_state(rx, &rx->dqo.recycled_buf_states, buf_state);
+ net_err_ratelimited("%s: Error returning from Rx DQO\n",
+ priv->dev->name);
+ gve_recycle_buf(rx, buf_state);
return -ENOMEM;
}
@@ -786,6 +962,8 @@ int gve_rx_poll_dqo(struct gve_notify_block *block, int budget)
rx->rx_skb_alloc_fail++;
else if (err == -EINVAL)
rx->rx_desc_err_dropped_pkt++;
+ else if (err == -EFAULT)
+ rx->rx_hsplit_err_dropped_pkt++;
u64_stats_update_end(&rx->statss);
}
@@ -844,3 +1022,39 @@ int gve_rx_poll_dqo(struct gve_notify_block *block, int budget)
return work_done;
}
+
+int gve_rx_handle_hdr_resources_dqo(struct gve_priv *priv,
+ bool enable_hdr_split)
+{
+ int err = 0;
+ int i;
+
+ if (enable_hdr_split) {
+ err = gve_rx_alloc_hdr_buf_pool(priv);
+ if (err)
+ goto err;
+
+ for (i = 0; i < priv->rx_cfg.num_queues; i++) {
+ err = gve_rx_alloc_hdr_bufs(priv, i);
+ if (err)
+ goto free_buf_pool;
+ }
+ } else {
+ for (i = 0; i < priv->rx_cfg.num_queues; i++)
+ gve_rx_free_hdr_bufs(priv, i);
+
+ dma_pool_destroy(priv->header_buf_pool);
+ priv->header_buf_pool = NULL;
+ }
+
+ return 0;
+
+free_buf_pool:
+ for (i--; i >= 0; i--)
+ gve_rx_free_hdr_bufs(priv, i);
+
+ dma_pool_destroy(priv->header_buf_pool);
+ priv->header_buf_pool = NULL;
+err:
+ return err;
+}
diff --git a/drivers/net/ethernet/google/gve/gve_utils.c b/drivers/net/ethernet/google/gve/gve_utils.c
index 26e08d753270..5e6275e7b517 100644
--- a/drivers/net/ethernet/google/gve/gve_utils.c
+++ b/drivers/net/ethernet/google/gve/gve_utils.c
@@ -48,11 +48,9 @@ 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);
@@ -60,12 +58,20 @@ 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 324fd98a6112..6131aefbc5b8 100644
--- a/drivers/net/ethernet/google/gve/gve_utils.h
+++ b/drivers/net/ethernet/google/gve/gve_utils.h
@@ -17,6 +17,9 @@ void gve_tx_add_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);
--
2.41.0.640.ga95def55d0-goog
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