ionic: remove desc, sg_desc and cmb_desc from desc_info

Remove the struct pointers from desc_info to use less space.
Instead of pointers in every desc_info to its descriptor,
we can use the queue descriptor index to find the individual
desc, desc_info, and sgl structs in their parallel arrays.

   struct ionic_desc_info
	Before:  /* size: 496, cachelines: 8, members: 10 */
	After:   /* size: 472, cachelines: 8, members: 7 */

Suggested-by: Neel Patel <npatel2@amd.com>
Reviewed-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 18 deletions

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index 746072b4dbd0..fc83f80fba00 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -708,38 +708,20 @@ int ionic_q_init(struct ionic_lif *lif, struct ionic_dev *idev,
 
 void ionic_q_map(struct ionic_queue *q, void *base, dma_addr_t base_pa)
 {
-	struct ionic_desc_info *cur;
-	unsigned int i;
-
 	q->base = base;
 	q->base_pa = base_pa;
-
-	for (i = 0, cur = q->info; i < q->num_descs; i++, cur++)
-		cur->desc = base + (i * q->desc_size);
 }
 
 void ionic_q_cmb_map(struct ionic_queue *q, void __iomem *base, dma_addr_t base_pa)
 {
-	struct ionic_desc_info *cur;
-	unsigned int i;
-
 	q->cmb_base = base;
 	q->cmb_base_pa = base_pa;
-
-	for (i = 0, cur = q->info; i < q->num_descs; i++, cur++)
-		cur->cmb_desc = base + (i * q->desc_size);
 }
 
 void ionic_q_sg_map(struct ionic_queue *q, void *base, dma_addr_t base_pa)
 {
-	struct ionic_desc_info *cur;
-	unsigned int i;
-
 	q->sg_base = base;
 	q->sg_base_pa = base_pa;
-
-	for (i = 0, cur = q->info; i < q->num_descs; i++, cur++)
-		cur->sg_desc = base + (i * q->sg_desc_size);
 }
 
 void ionic_q_post(struct ionic_queue *q, bool ring_doorbell, ionic_desc_cb cb,