enic: Add support for multiple hardware receive queues

Add support for multiple hardware receive queues. The ingress traffic is hashed into one of the receive queues based on IP or TCP or both headers. The max no. of receive queues supported is 8.
Signed-off-by: NVasanthy Kolluri <vkolluri@cisco.com>
Signed-off-by: NRoopa Prabhu <roprabhu@cisco.com>
Signed-off-by: NDavid Wang <dwang2@cisco.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/enic/enic.h

@@ -28,10 +28,11 @@
 #include "vnic_intr.h"
 #include "vnic_stats.h"
 #include "vnic_nic.h"
+#include "vnic_rss.h"
 
 #define DRV_NAME		"enic"
 #define DRV_DESCRIPTION		"Cisco VIC Ethernet NIC Driver"
-#define DRV_VERSION		"1.4.1.2a"
+#define DRV_VERSION		"1.4.1.6"
 #define DRV_COPYRIGHT		"Copyright 2008-2010 Cisco Systems, Inc"
 
 #define ENIC_BARS_MAX		6
@@ -41,25 +42,6 @@
 #define ENIC_CQ_MAX		(ENIC_WQ_MAX + ENIC_RQ_MAX)
 #define ENIC_INTR_MAX		(ENIC_CQ_MAX + 2)
 
-enum enic_cq_index {
-	ENIC_CQ_RQ,
-	ENIC_CQ_WQ,
-};
-
-enum enic_intx_intr_index {
-	ENIC_INTX_WQ_RQ,
-	ENIC_INTX_ERR,
-	ENIC_INTX_NOTIFY,
-};
-
-enum enic_msix_intr_index {
-	ENIC_MSIX_RQ,
-	ENIC_MSIX_WQ,
-	ENIC_MSIX_ERR,
-	ENIC_MSIX_NOTIFY,
-	ENIC_MSIX_MAX,
-};
-
 struct enic_msix_entry {
 	int requested;
 	char devname[IFNAMSIZ];
@@ -90,8 +72,8 @@ struct enic {
 	struct vnic_dev *vdev;
 	struct timer_list notify_timer;
 	struct work_struct reset;
-	struct msix_entry msix_entry[ENIC_MSIX_MAX];
-	struct enic_msix_entry msix[ENIC_MSIX_MAX];
+	struct msix_entry msix_entry[ENIC_INTR_MAX];
+	struct enic_msix_entry msix[ENIC_INTR_MAX];
 	u32 msg_enable;
 	spinlock_t devcmd_lock;
 	u8 mac_addr[ETH_ALEN];
@@ -118,7 +100,7 @@ struct enic {
 	int (*rq_alloc_buf)(struct vnic_rq *rq);
 	u64 rq_truncated_pkts;
 	u64 rq_bad_fcs;
-	struct napi_struct napi;
+	struct napi_struct napi[ENIC_RQ_MAX];
 
 	/* interrupt resource cache line section */
 	____cacheline_aligned struct vnic_intr intr[ENIC_INTR_MAX];

drivers/net/enic/enic_res.c

@@ -35,6 +35,7 @@
 #include "vnic_intr.h"
 #include "vnic_stats.h"
 #include "vnic_nic.h"
+#include "vnic_rss.h"
 #include "enic_res.h"
 #include "enic.h"
 
@@ -93,13 +94,14 @@ int enic_get_vnic_config(struct enic *enic)
 		INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
 		c->intr_timer_usec);
 
-	dev_info(enic_get_dev(enic), "vNIC MAC addr %pM wq/rq %d/%d\n",
-		enic->mac_addr, c->wq_desc_count, c->rq_desc_count);
-	dev_info(enic_get_dev(enic), "vNIC mtu %d csum tx/rx %d/%d "
-		"tso/lro %d/%d intr timer %d usec\n",
-		c->mtu, ENIC_SETTING(enic, TXCSUM),
-		ENIC_SETTING(enic, RXCSUM), ENIC_SETTING(enic, TSO),
-		ENIC_SETTING(enic, LRO), c->intr_timer_usec);
+	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);
+	dev_info(enic_get_dev(enic), "vNIC csum tx/rx %d/%d "
+		"tso/lro %d/%d intr timer %d usec rss %d\n",
+		ENIC_SETTING(enic, TXCSUM), ENIC_SETTING(enic, RXCSUM),
+		ENIC_SETTING(enic, TSO), ENIC_SETTING(enic, LRO),
+		c->intr_timer_usec, ENIC_SETTING(enic, RSS));
 
 	return 0;
 }
@@ -148,6 +150,22 @@ int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
 	return vnic_dev_cmd(enic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
 }
 
+int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len)
+{
+	u64 a0 = (u64)key_pa, a1 = len;
+	int wait = 1000;
+
+	return vnic_dev_cmd(enic->vdev, CMD_RSS_KEY, &a0, &a1, wait);
+}
+
+int enic_set_rss_cpu(struct enic *enic, dma_addr_t cpu_pa, u64 len)
+{
+	u64 a0 = (u64)cpu_pa, a1 = len;
+	int wait = 1000;
+
+	return vnic_dev_cmd(enic->vdev, CMD_RSS_CPU, &a0, &a1, wait);
+}
+
 void enic_free_vnic_resources(struct enic *enic)
 {
 	unsigned int i;
@@ -164,18 +182,11 @@ void enic_free_vnic_resources(struct enic *enic)
 
 void enic_get_res_counts(struct enic *enic)
 {
-	enic->wq_count = min_t(int,
-		vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ),
-		ENIC_WQ_MAX);
-	enic->rq_count = min_t(int,
-		vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ),
-		ENIC_RQ_MAX);
-	enic->cq_count = min_t(int,
-		vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ),
-		ENIC_CQ_MAX);
-	enic->intr_count = min_t(int,
-		vnic_dev_get_res_count(enic->vdev, RES_TYPE_INTR_CTRL),
-		ENIC_INTR_MAX);
+	enic->wq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ);
+	enic->rq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ);
+	enic->cq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ);
+	enic->intr_count = vnic_dev_get_res_count(enic->vdev,
+		RES_TYPE_INTR_CTRL);
 
 	dev_info(enic_get_dev(enic),
 		"vNIC resources avail: wq %d rq %d cq %d intr %d\n",

drivers/net/enic/enic_res.h

@@ -137,6 +137,8 @@ int enic_del_vlan(struct enic *enic, u16 vlanid);
 int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
 	u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
 	u8 ig_vlan_strip_en);
+int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len);
+int enic_set_rss_cpu(struct enic *enic, dma_addr_t cpu_pa, u64 len);
 void enic_get_res_counts(struct enic *enic);
 void enic_init_vnic_resources(struct enic *enic);
 int enic_alloc_vnic_resources(struct enic *);

drivers/net/enic/vnic_rss.h

+/*
+ * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _VNIC_RSS_H_
+#define _VNIC_RSS_H_
+
+/* RSS key array */
+union vnic_rss_key {
+	struct {
+		u8 b[10];
+		u8 b_pad[6];
+	} key[4];
+	u64 raw[8];
+};
+
+/* RSS cpu array */
+union vnic_rss_cpu {
+	struct {
+		u8 b[4] ;
+		u8 b_pad[4];
+	} cpu[32];
+	u64 raw[32];
+};
+
+#endif /* _VNIC_RSS_H_ */