diff options
| author | Shannon Nelson <snelson@pensando.io> | 2020-08-28 02:00:26 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-08-28 18:01:30 +0300 |
| commit | f1d2e894f1b77decfdae72fa41c24ddd2ecd33bc (patch) | |
| tree | 0b14aa8e2a2809e24396a64b6ace27729e6b9214 /drivers/net/ethernet/pensando/ionic/ionic_dev.h | |
| parent | ea5a8b09dc3a6ce14cd3ea1a7f8ea8aea6fc92ec (diff) | |
| download | linux-f1d2e894f1b77decfdae72fa41c24ddd2ecd33bc.tar.xz | |
ionic: use index not pointer for queue tracking
Use index counters rather than pointers for tracking head
and tail in the queues to save a little memory and to perhaps
slightly faster queue processing.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/pensando/ionic/ionic_dev.h')
| -rw-r--r-- | drivers/net/ethernet/pensando/ionic/ionic_dev.h | 49 |
1 files changed, 37 insertions, 12 deletions
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.h b/drivers/net/ethernet/pensando/ionic/ionic_dev.h index d5cba502abca..9e2ac2b8a082 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h +++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h @@ -149,7 +149,13 @@ struct ionic_dev { }; struct ionic_cq_info { - void *cq_desc; + union { + void *cq_desc; + struct ionic_txq_comp *txcq; + struct ionic_rxq_comp *rxcq; + struct ionic_admin_comp *admincq; + struct ionic_notifyq_event *notifyq; + }; struct ionic_cq_info *next; unsigned int index; bool last; @@ -169,8 +175,17 @@ struct ionic_page_info { }; struct ionic_desc_info { - void *desc; - void *sg_desc; + union { + void *desc; + struct ionic_txq_desc *txq_desc; + struct ionic_rxq_desc *rxq_desc; + struct ionic_admin_cmd *adminq_desc; + }; + union { + void *sg_desc; + struct ionic_txq_sg_desc *txq_sg_desc; + struct ionic_rxq_sg_desc *rxq_sgl_desc; + }; struct ionic_desc_info *next; unsigned int index; unsigned int left; @@ -183,22 +198,32 @@ struct ionic_desc_info { #define IONIC_QUEUE_NAME_MAX_SZ 32 struct ionic_queue { + struct device *dev; u64 dbell_count; u64 drop; u64 stop; u64 wake; struct ionic_lif *lif; struct ionic_desc_info *info; - struct ionic_desc_info *tail; - struct ionic_desc_info *head; struct ionic_dev *idev; + u16 head_idx; + u16 tail_idx; unsigned int index; unsigned int type; unsigned int hw_index; unsigned int hw_type; u64 dbval; - void *base; - void *sg_base; + union { + void *base; + struct ionic_txq_desc *txq; + struct ionic_rxq_desc *rxq; + struct ionic_admin_cmd *adminq; + }; + union { + void *sg_base; + struct ionic_txq_sg_desc *txq_sgl; + struct ionic_rxq_sg_desc *rxq_sgl; + }; dma_addr_t base_pa; dma_addr_t sg_base_pa; unsigned int num_descs; @@ -225,9 +250,9 @@ struct ionic_cq { dma_addr_t base_pa; struct ionic_lif *lif; struct ionic_cq_info *info; - struct ionic_cq_info *tail; struct ionic_queue *bound_q; struct ionic_intr_info *bound_intr; + u16 tail_idx; bool done_color; unsigned int num_descs; u64 compl_count; @@ -246,12 +271,12 @@ static inline void ionic_intr_init(struct ionic_dev *idev, static inline unsigned int ionic_q_space_avail(struct ionic_queue *q) { - unsigned int avail = q->tail->index; + unsigned int avail = q->tail_idx; - if (q->head->index >= avail) - avail += q->head->left - 1; + if (q->head_idx >= avail) + avail += q->num_descs - q->head_idx - 1; else - avail -= q->head->index + 1; + avail -= q->head_idx + 1; return avail; } |