ionic: remove the cq_info to save more memory

With a little simple math we don't need another struct array to
find the completion structs, so we can remove the ionic_cq_info
altogether.  This doesn't really save anything in the ionic_cq
since it gets padded out to the cacheline, but it does remove
the parallel array allocation of 8 * num_descriptors, or about
8 Kbytes per queue in a default configuration.

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, 2 insertions, 21 deletions

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index 94bd0db34473..594e65a52010 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -633,39 +633,20 @@ int ionic_cq_init(struct ionic_lif *lif, struct ionic_cq *cq,
 	return 0;
 }
 
-void ionic_cq_map(struct ionic_cq *cq, void *base, dma_addr_t base_pa)
-{
-	struct ionic_cq_info *cur;
-	unsigned int i;
-
-	cq->base = base;
-	cq->base_pa = base_pa;
-
-	for (i = 0, cur = cq->info; i < cq->num_descs; i++, cur++)
-		cur->cq_desc = base + (i * cq->desc_size);
-}
-
-void ionic_cq_bind(struct ionic_cq *cq, struct ionic_queue *q)
-{
-	cq->bound_q = q;
-}
-
 unsigned int ionic_cq_service(struct ionic_cq *cq, unsigned int work_to_do,
 			      ionic_cq_cb cb, ionic_cq_done_cb done_cb,
 			      void *done_arg)
 {
-	struct ionic_cq_info *cq_info;
 	unsigned int work_done = 0;
 
 	if (work_to_do == 0)
 		return 0;
 
-	cq_info = &cq->info[cq->tail_idx];
-	while (cb(cq, cq_info)) {
+	while (cb(cq)) {
 		if (cq->tail_idx == cq->num_descs - 1)
 			cq->done_color = !cq->done_color;
+
 		cq->tail_idx = (cq->tail_idx + 1) & (cq->num_descs - 1);
-		cq_info = &cq->info[cq->tail_idx];
 
 		if (++work_done >= work_to_do)
 			break;