be2net: use EQ_CREATEv2 for SH-R

EQ_CREATEv2 explicitly returns the msix-index associated with a EQ.
For SH-R this is needed if EQs need to be deleted and re-created without
resetting a function.

Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 18 insertions, 39 deletions

diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h
index 11c815d..7c5f9f2 100644
--- a/drivers/net/ethernet/emulex/benet/be.h
+++ b/drivers/net/ethernet/emulex/benet/be.h
@@ -189,6 +189,7 @@ struct be_eq_obj {
 	u32 cur_eqd;		/* in usecs */
 
 	u8 idx;			/* array index */
+	u8 msix_idx;
 	u16 tx_budget;
 	u16 spurious_intr;
 	struct napi_struct napi;
diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.c b/drivers/net/ethernet/emulex/benet/be_cmds.c
index 85923e2..e69835c 100644
--- a/drivers/net/ethernet/emulex/benet/be_cmds.c
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.c
@@ -678,31 +678,6 @@ static void be_cmd_page_addrs_prepare(struct phys_addr *pages, u32 max_pages,
 	}
 }
 
-/* Converts interrupt delay in microseconds to multiplier value */
-static u32 eq_delay_to_mult(u32 usec_delay)
-{
-#define MAX_INTR_RATE			651042
-	const u32 round = 10;
-	u32 multiplier;
-
-	if (usec_delay == 0)
-		multiplier = 0;
-	else {
-		u32 interrupt_rate = 1000000 / usec_delay;
-		/* Max delay, corresponding to the lowest interrupt rate */
-		if (interrupt_rate == 0)
-			multiplier = 1023;
-		else {
-			multiplier = (MAX_INTR_RATE - interrupt_rate) * round;
-			multiplier /= interrupt_rate;
-			/* Round the multiplier to the closest value.*/
-			multiplier = (multiplier + round/2) / round;
-			multiplier = min(multiplier, (u32)1023);
-		}
-	}
-	return multiplier;
-}
-
 static inline struct be_mcc_wrb *wrb_from_mbox(struct be_adapter *adapter)
 {
 	struct be_dma_mem *mbox_mem = &adapter->mbox_mem;
@@ -790,13 +765,12 @@ int be_cmd_fw_clean(struct be_adapter *adapter)
 	return status;
 }
 
-int be_cmd_eq_create(struct be_adapter *adapter,
-		struct be_queue_info *eq, int eq_delay)
+int be_cmd_eq_create(struct be_adapter *adapter, struct be_eq_obj *eqo)
 {
 	struct be_mcc_wrb *wrb;
 	struct be_cmd_req_eq_create *req;
-	struct be_dma_mem *q_mem = &eq->dma_mem;
-	int status;
+	struct be_dma_mem *q_mem = &eqo->q.dma_mem;
+	int status, ver = 0;
 
 	if (mutex_lock_interruptible(&adapter->mbox_lock))
 		return -1;
@@ -807,15 +781,18 @@ int be_cmd_eq_create(struct be_adapter *adapter,
 	be_wrb_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
 		OPCODE_COMMON_EQ_CREATE, sizeof(*req), wrb, NULL);
 
+	/* Support for EQ_CREATEv2 available only SH-R onwards */
+	if (!(BEx_chip(adapter) || lancer_chip(adapter)))
+		ver = 2;
+
+	req->hdr.version = ver;
 	req->num_pages =  cpu_to_le16(PAGES_4K_SPANNED(q_mem->va, q_mem->size));
 
 	AMAP_SET_BITS(struct amap_eq_context, valid, req->context, 1);
 	/* 4byte eqe*/
 	AMAP_SET_BITS(struct amap_eq_context, size, req->context, 0);
 	AMAP_SET_BITS(struct amap_eq_context, count, req->context,
-			__ilog2_u32(eq->len/256));
-	AMAP_SET_BITS(struct amap_eq_context, delaymult, req->context,
-			eq_delay_to_mult(eq_delay));
+		      __ilog2_u32(eqo->q.len / 256));
 	be_dws_cpu_to_le(req->context, sizeof(req->context));
 
 	be_cmd_page_addrs_prepare(req->pages, ARRAY_SIZE(req->pages), q_mem);
@@ -823,8 +800,10 @@ int be_cmd_eq_create(struct be_adapter *adapter,
 	status = be_mbox_notify_wait(adapter);
 	if (!status) {
 		struct be_cmd_resp_eq_create *resp = embedded_payload(wrb);
-		eq->id = le16_to_cpu(resp->eq_id);
-		eq->created = true;
+		eqo->q.id = le16_to_cpu(resp->eq_id);
+		eqo->msix_idx =
+			(ver == 2) ? le16_to_cpu(resp->msix_idx) : eqo->idx;
+		eqo->q.created = true;
 	}
 
 	mutex_unlock(&adapter->mbox_lock);
diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.h b/drivers/net/ethernet/emulex/benet/be_cmds.h
index 6237192..880c85a 100644
--- a/drivers/net/ethernet/emulex/benet/be_cmds.h
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.h
@@ -307,7 +307,7 @@ struct be_cmd_req_eq_create {
 struct be_cmd_resp_eq_create {
 	struct be_cmd_resp_hdr resp_hdr;
 	u16 eq_id;		/* sword */
-	u16 rsvd0;		/* sword */
+	u16 msix_idx;		/* available only in v2 */
 } __packed;
 
 /******************** Mac query ***************************/
@@ -1851,8 +1851,7 @@ extern int be_cmd_if_create(struct be_adapter *adapter, u32 cap_flags,
 			    u32 en_flags, u32 *if_handle, u32 domain);
 extern int be_cmd_if_destroy(struct be_adapter *adapter, int if_handle,
 			u32 domain);
-extern int be_cmd_eq_create(struct be_adapter *adapter,
-			struct be_queue_info *eq, int eq_delay);
+extern int be_cmd_eq_create(struct be_adapter *adapter, struct be_eq_obj *eqo);
 extern int be_cmd_cq_create(struct be_adapter *adapter,
 			struct be_queue_info *cq, struct be_queue_info *eq,
 			bool no_delay, int num_cqe_dma_coalesce);
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 08f6417..6f040d8 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -1939,7 +1939,7 @@ static int be_evt_queues_create(struct be_adapter *adapter)
 		if (rc)
 			return rc;
 
-		rc = be_cmd_eq_create(adapter, eq, eqo->cur_eqd);
+		rc = be_cmd_eq_create(adapter, eqo);
 		if (rc)
 			return rc;
 	}
@@ -2443,7 +2443,7 @@ done:
 static inline int be_msix_vec_get(struct be_adapter *adapter,
 				struct be_eq_obj *eqo)
 {
-	return adapter->msix_entries[eqo->idx].vector;
+	return adapter->msix_entries[eqo->msix_idx].vector;
 }
 
 static int be_msix_register(struct be_adapter *adapter)