1 files changed, 73 insertions, 14 deletions

diff --git a/drivers/net/ethernet/cisco/enic/enic_res.c b/drivers/net/ethernet/cisco/enic/enic_res.c
index 126125199833..bbd3143ed73e 100644
--- a/drivers/net/ethernet/cisco/enic/enic_res.c
+++ b/drivers/net/ethernet/cisco/enic/enic_res.c
@@ -59,31 +59,38 @@ int enic_get_vnic_config(struct enic *enic)
 	GET_CONFIG(intr_timer_usec);
 	GET_CONFIG(loop_tag);
 	GET_CONFIG(num_arfs);
+	GET_CONFIG(max_rq_ring);
+	GET_CONFIG(max_wq_ring);
+	GET_CONFIG(max_cq_ring);
+
+	if (!c->max_wq_ring)
+		c->max_wq_ring = ENIC_MAX_WQ_DESCS_DEFAULT;
+	if (!c->max_rq_ring)
+		c->max_rq_ring = ENIC_MAX_RQ_DESCS_DEFAULT;
+	if (!c->max_cq_ring)
+		c->max_cq_ring = ENIC_MAX_CQ_DESCS_DEFAULT;
 
 	c->wq_desc_count =
-		min_t(u32, ENIC_MAX_WQ_DESCS,
-		max_t(u32, ENIC_MIN_WQ_DESCS,
-		c->wq_desc_count));
+		min_t(u32, c->max_wq_ring,
+		      max_t(u32, ENIC_MIN_WQ_DESCS, c->wq_desc_count));
 	c->wq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
 
 	c->rq_desc_count =
-		min_t(u32, ENIC_MAX_RQ_DESCS,
-		max_t(u32, ENIC_MIN_RQ_DESCS,
-		c->rq_desc_count));
+		min_t(u32, c->max_rq_ring,
+		      max_t(u32, ENIC_MIN_RQ_DESCS, c->rq_desc_count));
 	c->rq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
 
 	if (c->mtu == 0)
 		c->mtu = 1500;
-	c->mtu = min_t(u16, ENIC_MAX_MTU,
-		max_t(u16, ENIC_MIN_MTU,
-		c->mtu));
+	c->mtu = min_t(u16, ENIC_MAX_MTU, max_t(u16, ENIC_MIN_MTU, c->mtu));
 
 	c->intr_timer_usec = min_t(u32, c->intr_timer_usec,
 		vnic_dev_get_intr_coal_timer_max(enic->vdev));
 
 	dev_info(enic_get_dev(enic),
-		"vNIC MAC addr %pM wq/rq %d/%d mtu %d\n",
-		enic->mac_addr, c->wq_desc_count, c->rq_desc_count, c->mtu);
+		 "vNIC MAC addr %pM wq/rq %d/%d max wq/rq/cq %d/%d/%d mtu %d\n",
+		 enic->mac_addr, c->wq_desc_count, c->rq_desc_count,
+		 c->max_wq_ring, c->max_rq_ring, c->max_cq_ring, c->mtu);
 
 	dev_info(enic_get_dev(enic), "vNIC csum tx/rx %s/%s "
 		"tso/lro %s/%s rss %s intr mode %s type %s timer %d usec "
@@ -312,6 +319,7 @@ void enic_init_vnic_resources(struct enic *enic)
 int enic_alloc_vnic_resources(struct enic *enic)
 {
 	enum vnic_dev_intr_mode intr_mode;
+	int rq_cq_desc_size;
 	unsigned int i;
 	int err;
 
@@ -326,6 +334,24 @@ int enic_alloc_vnic_resources(struct enic *enic)
 		intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
 		"unknown");
 
+	switch (enic->ext_cq) {
+	case ENIC_RQ_CQ_ENTRY_SIZE_16:
+		rq_cq_desc_size = 16;
+		break;
+	case ENIC_RQ_CQ_ENTRY_SIZE_32:
+		rq_cq_desc_size = 32;
+		break;
+	case ENIC_RQ_CQ_ENTRY_SIZE_64:
+		rq_cq_desc_size = 64;
+		break;
+	default:
+		dev_err(enic_get_dev(enic),
+			"Unable to determine rq cq desc size: %d",
+			enic->ext_cq);
+		err = -ENODEV;
+		goto err_out;
+	}
+
 	/* Allocate queue resources
 	 */
 
@@ -348,8 +374,8 @@ int enic_alloc_vnic_resources(struct enic *enic)
 	for (i = 0; i < enic->cq_count; i++) {
 		if (i < enic->rq_count)
 			err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
-				enic->config.rq_desc_count,
-				sizeof(struct cq_enet_rq_desc));
+					enic->config.rq_desc_count,
+					rq_cq_desc_size);
 		else
 			err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
 				enic->config.wq_desc_count,
@@ -380,6 +406,39 @@ int enic_alloc_vnic_resources(struct enic *enic)
 
 err_out_cleanup:
 	enic_free_vnic_resources(enic);
-
+err_out:
 	return err;
 }
+
+/*
+ * CMD_CQ_ENTRY_SIZE_SET can fail on older hw generations that don't support
+ * that command
+ */
+void enic_ext_cq(struct enic *enic)
+{
+	u64 a0 = CMD_CQ_ENTRY_SIZE_SET, a1 = 0;
+	int wait = 1000;
+	int ret;
+
+	spin_lock_bh(&enic->devcmd_lock);
+	ret = vnic_dev_cmd(enic->vdev, CMD_CAPABILITY, &a0, &a1, wait);
+	if (ret || a0) {
+		dev_info(&enic->pdev->dev,
+			 "CMD_CQ_ENTRY_SIZE_SET not supported.");
+		enic->ext_cq = ENIC_RQ_CQ_ENTRY_SIZE_16;
+		goto out;
+	}
+	a1 &= VNIC_RQ_CQ_ENTRY_SIZE_ALL_BIT;
+	enic->ext_cq = fls(a1) - 1;
+	a0 = VNIC_RQ_ALL;
+	a1 = enic->ext_cq;
+	ret = vnic_dev_cmd(enic->vdev, CMD_CQ_ENTRY_SIZE_SET, &a0, &a1, wait);
+	if (ret) {
+		dev_info(&enic->pdev->dev, "CMD_CQ_ENTRY_SIZE_SET failed.");
+		enic->ext_cq = ENIC_RQ_CQ_ENTRY_SIZE_16;
+	}
+out:
+	spin_unlock_bh(&enic->devcmd_lock);
+	dev_info(&enic->pdev->dev, "CQ entry size set to %d bytes",
+		 16 << enic->ext_cq);
+}