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gve: Remove qpl_cfg struct since qpl_ids map with queues respectively
The qpl_cfg struct was used to make sure that no two different queues are using QPL with the same qpl_id. We can remove that qpl_cfg struct since now the qpl_ids map with the queues respectively as follows: For tx queues: qpl_id = tx_qid For rx queues: qpl_id = max_tx_queues + rx_qid And when XDP is used, it will need the user to reduce the tx queues to be at most half of the max_tx_queues. Then it will use the same number of tx queues starting from the end of existing tx queues for XDP. So the XDP queues will not exceed the max_tx_queues range and will not overlap with the rx queues, where the qpl_ids will not have overlapping too. Considering of that, we remove the qpl_cfg struct to get the qpl_id directly based on the queue id. Unless we are erroneously allocating a rx/tx queue that has already been allocated, we would never allocate the qpl with the same qpl_id twice. In that case, it should fail much earlier than the QPL assignment. Suggested-by: Praveen Kaligineedi <pkaligineedi@google.com> Signed-off-by: Ziwei Xiao <ziweixiao@google.com> Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com> Reviewed-by: Shailend Chand <shailend@google.com> Link: https://lore.kernel.org/r/20240417205757.778551-1-ziweixiao@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
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33d21bd1c8
commit
fdf4123743
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@ -639,7 +639,6 @@ struct gve_ptype_lut {
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/* Parameters for allocating queue page lists */
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struct gve_qpls_alloc_cfg {
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struct gve_qpl_config *qpl_cfg;
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struct gve_queue_config *tx_cfg;
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struct gve_queue_config *rx_cfg;
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@ -655,9 +654,8 @@ struct gve_qpls_alloc_cfg {
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struct gve_tx_alloc_rings_cfg {
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struct gve_queue_config *qcfg;
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/* qpls and qpl_cfg must already be allocated */
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/* qpls must already be allocated */
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struct gve_queue_page_list *qpls;
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struct gve_qpl_config *qpl_cfg;
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u16 ring_size;
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u16 start_idx;
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@ -674,9 +672,8 @@ struct gve_rx_alloc_rings_cfg {
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struct gve_queue_config *qcfg;
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struct gve_queue_config *qcfg_tx;
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/* qpls and qpl_cfg must already be allocated */
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/* qpls must already be allocated */
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struct gve_queue_page_list *qpls;
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struct gve_qpl_config *qpl_cfg;
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u16 ring_size;
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u16 packet_buffer_size;
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@ -732,7 +729,6 @@ struct gve_priv {
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u16 num_xdp_queues;
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struct gve_queue_config tx_cfg;
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struct gve_queue_config rx_cfg;
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struct gve_qpl_config qpl_cfg; /* map used QPL ids */
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u32 num_ntfy_blks; /* spilt between TX and RX so must be even */
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struct gve_registers __iomem *reg_bar0; /* see gve_register.h */
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@ -1053,37 +1049,6 @@ static inline u32 gve_get_rx_pages_per_qpl_dqo(u32 rx_desc_cnt)
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return 2 * rx_desc_cnt;
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}
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/* Returns a pointer to the next available tx qpl in the list of qpls */
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static inline
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struct gve_queue_page_list *gve_assign_tx_qpl(struct gve_tx_alloc_rings_cfg *cfg,
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int tx_qid)
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{
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/* QPL already in use */
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if (test_bit(tx_qid, cfg->qpl_cfg->qpl_id_map))
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return NULL;
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set_bit(tx_qid, cfg->qpl_cfg->qpl_id_map);
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return &cfg->qpls[tx_qid];
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}
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/* Returns a pointer to the next available rx qpl in the list of qpls */
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static inline
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struct gve_queue_page_list *gve_assign_rx_qpl(struct gve_rx_alloc_rings_cfg *cfg,
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int rx_qid)
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{
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int id = gve_get_rx_qpl_id(cfg->qcfg_tx, rx_qid);
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/* QPL already in use */
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if (test_bit(id, cfg->qpl_cfg->qpl_id_map))
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return NULL;
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set_bit(id, cfg->qpl_cfg->qpl_id_map);
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return &cfg->qpls[id];
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}
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/* Unassigns the qpl with the given id */
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static inline void gve_unassign_qpl(struct gve_qpl_config *qpl_cfg, int id)
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{
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clear_bit(id, qpl_cfg->qpl_id_map);
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}
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/* Returns the correct dma direction for tx and rx qpls */
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static inline enum dma_data_direction gve_qpl_dma_dir(struct gve_priv *priv,
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int id)
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@ -510,7 +510,6 @@ static int gve_adjust_ring_sizes(struct gve_priv *priv,
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struct gve_tx_alloc_rings_cfg tx_alloc_cfg = {0};
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struct gve_rx_alloc_rings_cfg rx_alloc_cfg = {0};
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struct gve_qpls_alloc_cfg qpls_alloc_cfg = {0};
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struct gve_qpl_config new_qpl_cfg;
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int err;
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/* get current queue configuration */
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@ -521,14 +520,6 @@ static int gve_adjust_ring_sizes(struct gve_priv *priv,
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tx_alloc_cfg.ring_size = new_tx_desc_cnt;
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rx_alloc_cfg.ring_size = new_rx_desc_cnt;
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/* qpl_cfg is not read-only, it contains a map that gets updated as
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* rings are allocated, which is why we cannot use the yet unreleased
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* one in priv.
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*/
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qpls_alloc_cfg.qpl_cfg = &new_qpl_cfg;
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tx_alloc_cfg.qpl_cfg = &new_qpl_cfg;
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rx_alloc_cfg.qpl_cfg = &new_qpl_cfg;
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if (netif_running(priv->dev)) {
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err = gve_adjust_config(priv, &qpls_alloc_cfg,
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&tx_alloc_cfg, &rx_alloc_cfg);
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@ -829,7 +829,6 @@ static void gve_tx_get_curr_alloc_cfg(struct gve_priv *priv,
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cfg->qcfg = &priv->tx_cfg;
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cfg->raw_addressing = !gve_is_qpl(priv);
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cfg->qpls = priv->qpls;
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cfg->qpl_cfg = &priv->qpl_cfg;
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cfg->ring_size = priv->tx_desc_cnt;
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cfg->start_idx = 0;
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cfg->num_rings = gve_num_tx_queues(priv);
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@ -1119,22 +1118,13 @@ static int gve_alloc_qpls(struct gve_priv *priv, struct gve_qpls_alloc_cfg *cfg,
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if (!qpls)
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return -ENOMEM;
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cfg->qpl_cfg->qpl_map_size = BITS_TO_LONGS(max_queues) *
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sizeof(unsigned long) * BITS_PER_BYTE;
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cfg->qpl_cfg->qpl_id_map = kvcalloc(BITS_TO_LONGS(max_queues),
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sizeof(unsigned long), GFP_KERNEL);
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if (!cfg->qpl_cfg->qpl_id_map) {
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err = -ENOMEM;
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goto free_qpl_array;
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}
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/* Allocate TX QPLs */
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page_count = priv->tx_pages_per_qpl;
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tx_num_qpls = gve_num_tx_qpls(cfg->tx_cfg, cfg->num_xdp_queues,
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gve_is_qpl(priv));
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err = gve_alloc_n_qpls(priv, qpls, page_count, 0, tx_num_qpls);
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if (err)
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goto free_qpl_map;
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goto free_qpl_array;
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/* Allocate RX QPLs */
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rx_start_id = gve_rx_start_qpl_id(cfg->tx_cfg);
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@ -1157,9 +1147,6 @@ static int gve_alloc_qpls(struct gve_priv *priv, struct gve_qpls_alloc_cfg *cfg,
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free_tx_qpls:
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gve_free_n_qpls(priv, qpls, 0, tx_num_qpls);
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free_qpl_map:
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kvfree(cfg->qpl_cfg->qpl_id_map);
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cfg->qpl_cfg->qpl_id_map = NULL;
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free_qpl_array:
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kvfree(qpls);
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return err;
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@ -1175,9 +1162,6 @@ static void gve_free_qpls(struct gve_priv *priv,
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if (!qpls)
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return;
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kvfree(cfg->qpl_cfg->qpl_id_map);
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cfg->qpl_cfg->qpl_id_map = NULL;
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for (i = 0; i < max_queues; i++)
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gve_free_queue_page_list(priv, &qpls[i], i);
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@ -1292,7 +1276,6 @@ static void gve_qpls_get_curr_alloc_cfg(struct gve_priv *priv,
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cfg->raw_addressing = !gve_is_qpl(priv);
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cfg->is_gqi = gve_is_gqi(priv);
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cfg->num_xdp_queues = priv->num_xdp_queues;
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cfg->qpl_cfg = &priv->qpl_cfg;
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cfg->tx_cfg = &priv->tx_cfg;
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cfg->rx_cfg = &priv->rx_cfg;
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cfg->qpls = priv->qpls;
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@ -1306,7 +1289,6 @@ static void gve_rx_get_curr_alloc_cfg(struct gve_priv *priv,
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cfg->raw_addressing = !gve_is_qpl(priv);
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cfg->enable_header_split = priv->header_split_enabled;
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cfg->qpls = priv->qpls;
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cfg->qpl_cfg = &priv->qpl_cfg;
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cfg->ring_size = priv->rx_desc_cnt;
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cfg->packet_buffer_size = gve_is_gqi(priv) ?
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GVE_DEFAULT_RX_BUFFER_SIZE :
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@ -1419,7 +1401,6 @@ static int gve_queues_start(struct gve_priv *priv,
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priv->rx = rx_alloc_cfg->rx;
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/* Record new configs into priv */
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priv->qpl_cfg = *qpls_alloc_cfg->qpl_cfg;
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priv->tx_cfg = *tx_alloc_cfg->qcfg;
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priv->rx_cfg = *rx_alloc_cfg->qcfg;
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priv->tx_desc_cnt = tx_alloc_cfg->ring_size;
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@ -1916,20 +1897,11 @@ int gve_adjust_queues(struct gve_priv *priv,
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struct gve_tx_alloc_rings_cfg tx_alloc_cfg = {0};
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struct gve_rx_alloc_rings_cfg rx_alloc_cfg = {0};
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struct gve_qpls_alloc_cfg qpls_alloc_cfg = {0};
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struct gve_qpl_config new_qpl_cfg;
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int err;
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gve_get_curr_alloc_cfgs(priv, &qpls_alloc_cfg,
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&tx_alloc_cfg, &rx_alloc_cfg);
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/* qpl_cfg is not read-only, it contains a map that gets updated as
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* rings are allocated, which is why we cannot use the yet unreleased
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* one in priv.
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*/
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qpls_alloc_cfg.qpl_cfg = &new_qpl_cfg;
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tx_alloc_cfg.qpl_cfg = &new_qpl_cfg;
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rx_alloc_cfg.qpl_cfg = &new_qpl_cfg;
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/* Relay the new config from ethtool */
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qpls_alloc_cfg.tx_cfg = &new_tx_config;
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tx_alloc_cfg.qcfg = &new_tx_config;
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@ -2121,18 +2093,10 @@ static int gve_set_features(struct net_device *netdev,
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struct gve_rx_alloc_rings_cfg rx_alloc_cfg = {0};
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struct gve_qpls_alloc_cfg qpls_alloc_cfg = {0};
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struct gve_priv *priv = netdev_priv(netdev);
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struct gve_qpl_config new_qpl_cfg;
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int err;
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gve_get_curr_alloc_cfgs(priv, &qpls_alloc_cfg,
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&tx_alloc_cfg, &rx_alloc_cfg);
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/* qpl_cfg is not read-only, it contains a map that gets updated as
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* rings are allocated, which is why we cannot use the yet unreleased
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* one in priv.
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*/
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qpls_alloc_cfg.qpl_cfg = &new_qpl_cfg;
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tx_alloc_cfg.qpl_cfg = &new_qpl_cfg;
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rx_alloc_cfg.qpl_cfg = &new_qpl_cfg;
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if ((netdev->features & NETIF_F_LRO) != (features & NETIF_F_LRO)) {
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netdev->features ^= NETIF_F_LRO;
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@ -38,7 +38,6 @@ static void gve_rx_unfill_pages(struct gve_priv *priv,
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for (i = 0; i < slots; i++)
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page_ref_sub(rx->data.page_info[i].page,
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rx->data.page_info[i].pagecnt_bias - 1);
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gve_unassign_qpl(cfg->qpl_cfg, rx->data.qpl->id);
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rx->data.qpl = NULL;
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for (i = 0; i < rx->qpl_copy_pool_mask + 1; i++) {
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@ -145,13 +144,11 @@ static int gve_rx_prefill_pages(struct gve_rx_ring *rx,
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return -ENOMEM;
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if (!rx->data.raw_addressing) {
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rx->data.qpl = gve_assign_rx_qpl(cfg, rx->q_num);
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if (!rx->data.qpl) {
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kvfree(rx->data.page_info);
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rx->data.page_info = NULL;
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return -ENOMEM;
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}
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u32 qpl_id = gve_get_rx_qpl_id(cfg->qcfg_tx, rx->q_num);
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rx->data.qpl = &cfg->qpls[qpl_id];
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}
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for (i = 0; i < slots; i++) {
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if (!rx->data.raw_addressing) {
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struct page *page = rx->data.qpl->pages[i];
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@ -204,7 +201,6 @@ static int gve_rx_prefill_pages(struct gve_rx_ring *rx,
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page_ref_sub(rx->data.page_info[i].page,
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rx->data.page_info[i].pagecnt_bias - 1);
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gve_unassign_qpl(cfg->qpl_cfg, rx->data.qpl->id);
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rx->data.qpl = NULL;
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return err;
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@ -247,10 +247,8 @@ static void gve_rx_free_ring_dqo(struct gve_priv *priv, struct gve_rx_ring *rx,
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if (bs->page_info.page)
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gve_free_page_dqo(priv, bs, !rx->dqo.qpl);
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}
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if (rx->dqo.qpl) {
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gve_unassign_qpl(cfg->qpl_cfg, rx->dqo.qpl->id);
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rx->dqo.qpl = NULL;
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}
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rx->dqo.qpl = NULL;
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if (rx->dqo.bufq.desc_ring) {
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size = sizeof(rx->dqo.bufq.desc_ring[0]) * buffer_queue_slots;
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@ -359,9 +357,9 @@ static int gve_rx_alloc_ring_dqo(struct gve_priv *priv,
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goto err;
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if (!cfg->raw_addressing) {
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rx->dqo.qpl = gve_assign_rx_qpl(cfg, rx->q_num);
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if (!rx->dqo.qpl)
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goto err;
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u32 qpl_id = gve_get_rx_qpl_id(cfg->qcfg_tx, rx->q_num);
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rx->dqo.qpl = &cfg->qpls[qpl_id];
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rx->dqo.next_qpl_page_idx = 0;
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}
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@ -225,7 +225,6 @@ static void gve_tx_free_ring_gqi(struct gve_priv *priv, struct gve_tx_ring *tx,
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if (!tx->raw_addressing) {
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gve_tx_fifo_release(priv, &tx->tx_fifo);
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gve_unassign_qpl(cfg->qpl_cfg, tx->tx_fifo.qpl->id);
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tx->tx_fifo.qpl = NULL;
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}
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@ -280,12 +279,12 @@ static int gve_tx_alloc_ring_gqi(struct gve_priv *priv,
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tx->raw_addressing = cfg->raw_addressing;
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tx->dev = hdev;
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if (!tx->raw_addressing) {
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tx->tx_fifo.qpl = gve_assign_tx_qpl(cfg, idx);
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if (!tx->tx_fifo.qpl)
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goto abort_with_desc;
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u32 qpl_id = gve_tx_qpl_id(priv, tx->q_num);
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tx->tx_fifo.qpl = &cfg->qpls[qpl_id];
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/* map Tx FIFO */
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if (gve_tx_fifo_init(priv, &tx->tx_fifo))
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goto abort_with_qpl;
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goto abort_with_desc;
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}
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tx->q_resources =
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@ -301,9 +300,6 @@ static int gve_tx_alloc_ring_gqi(struct gve_priv *priv,
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abort_with_fifo:
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if (!tx->raw_addressing)
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gve_tx_fifo_release(priv, &tx->tx_fifo);
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abort_with_qpl:
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if (!tx->raw_addressing)
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gve_unassign_qpl(cfg->qpl_cfg, tx->tx_fifo.qpl->id);
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abort_with_desc:
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dma_free_coherent(hdev, bytes, tx->desc, tx->bus);
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tx->desc = NULL;
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@ -236,10 +236,7 @@ static void gve_tx_free_ring_dqo(struct gve_priv *priv, struct gve_tx_ring *tx,
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kvfree(tx->dqo.tx_qpl_buf_next);
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tx->dqo.tx_qpl_buf_next = NULL;
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if (tx->dqo.qpl) {
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gve_unassign_qpl(cfg->qpl_cfg, tx->dqo.qpl->id);
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tx->dqo.qpl = NULL;
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}
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tx->dqo.qpl = NULL;
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netif_dbg(priv, drv, priv->dev, "freed tx queue %d\n", idx);
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}
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@ -352,9 +349,9 @@ static int gve_tx_alloc_ring_dqo(struct gve_priv *priv,
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goto err;
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if (!cfg->raw_addressing) {
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tx->dqo.qpl = gve_assign_tx_qpl(cfg, idx);
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if (!tx->dqo.qpl)
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goto err;
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u32 qpl_id = gve_tx_qpl_id(priv, tx->q_num);
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tx->dqo.qpl = &cfg->qpls[qpl_id];
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if (gve_tx_qpl_buf_init(tx))
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goto err;
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