enic: add Cisco 10G Ethernet NIC driver

Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 370 insertions, 0 deletions

diff --git a/drivers/net/enic/enic_res.c b/drivers/net/enic/enic_res.c
new file mode 100644
index 000000000000..95184b9108ef
--- /dev/null
+++ b/drivers/net/enic/enic_res.c
@@ -0,0 +1,370 @@
+/*
+ * Copyright 2008 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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+
+#include "wq_enet_desc.h"
+#include "rq_enet_desc.h"
+#include "cq_enet_desc.h"
+#include "vnic_resource.h"
+#include "vnic_enet.h"
+#include "vnic_dev.h"
+#include "vnic_wq.h"
+#include "vnic_rq.h"
+#include "vnic_cq.h"
+#include "vnic_intr.h"
+#include "vnic_stats.h"
+#include "vnic_nic.h"
+#include "vnic_rss.h"
+#include "enic_res.h"
+#include "enic.h"
+
+int enic_get_vnic_config(struct enic *enic)
+{
+	struct vnic_enet_config *c = &enic->config;
+	int err;
+
+	err = vnic_dev_mac_addr(enic->vdev, enic->mac_addr);
+	if (err) {
+		printk(KERN_ERR PFX "Error getting MAC addr, %d\n", err);
+		return err;
+	}
+
+#define GET_CONFIG(m) \
+	do { \
+		err = vnic_dev_spec(enic->vdev, \
+			offsetof(struct vnic_enet_config, m), \
+			sizeof(c->m), &c->m); \
+		if (err) { \
+			printk(KERN_ERR PFX \
+				"Error getting %s, %d\n", #m, err); \
+			return err; \
+		} \
+	} while (0)
+
+	GET_CONFIG(flags);
+	GET_CONFIG(wq_desc_count);
+	GET_CONFIG(rq_desc_count);
+	GET_CONFIG(mtu);
+	GET_CONFIG(intr_timer);
+	GET_CONFIG(intr_timer_type);
+	GET_CONFIG(intr_mode);
+
+	c->wq_desc_count =
+		min_t(u32, ENIC_MAX_WQ_DESCS,
+		max_t(u32, ENIC_MIN_WQ_DESCS,
+		c->wq_desc_count));
+	c->wq_desc_count &= 0xfffffff0; /* must be aligned to groups of 16 */
+
+	c->rq_desc_count =
+		min_t(u32, ENIC_MAX_RQ_DESCS,
+		max_t(u32, ENIC_MIN_RQ_DESCS,
+		c->rq_desc_count));
+	c->rq_desc_count &= 0xfffffff0; /* must be aligned to groups of 16 */
+
+	if (c->mtu == 0)
+		c->mtu = 1500;
+	c->mtu = min_t(u16, ENIC_MAX_MTU,
+		max_t(u16, ENIC_MIN_MTU,
+		c->mtu));
+
+	c->intr_timer = min_t(u16, VNIC_INTR_TIMER_MAX, c->intr_timer);
+
+	printk(KERN_INFO PFX "vNIC MAC addr %02x:%02x:%02x:%02x:%02x:%02x "
+		"wq/rq %d/%d\n",
+		enic->mac_addr[0], enic->mac_addr[1], enic->mac_addr[2],
+		enic->mac_addr[3], enic->mac_addr[4], enic->mac_addr[5],
+		c->wq_desc_count, c->rq_desc_count);
+	printk(KERN_INFO PFX "vNIC mtu %d csum tx/rx %d/%d tso/lro %d/%d "
+		"intr timer %d\n",
+		c->mtu, ENIC_SETTING(enic, TXCSUM),
+		ENIC_SETTING(enic, RXCSUM), ENIC_SETTING(enic, TSO),
+		ENIC_SETTING(enic, LRO), c->intr_timer);
+
+	return 0;
+}
+
+void enic_add_station_addr(struct enic *enic)
+{
+	vnic_dev_add_addr(enic->vdev, enic->mac_addr);
+}
+
+void enic_add_multicast_addr(struct enic *enic, u8 *addr)
+{
+	vnic_dev_add_addr(enic->vdev, addr);
+}
+
+void enic_del_multicast_addr(struct enic *enic, u8 *addr)
+{
+	vnic_dev_del_addr(enic->vdev, addr);
+}
+
+void enic_add_vlan(struct enic *enic, u16 vlanid)
+{
+	u64 a0 = vlanid, a1 = 0;
+	int wait = 1000;
+	int err;
+
+	err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait);
+	if (err)
+		printk(KERN_ERR PFX "Can't add vlan id, %d\n", err);
+}
+
+void enic_del_vlan(struct enic *enic, u16 vlanid)
+{
+	u64 a0 = vlanid, a1 = 0;
+	int wait = 1000;
+	int err;
+
+	err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait);
+	if (err)
+		printk(KERN_ERR PFX "Can't delete vlan id, %d\n", err);
+}
+
+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)
+{
+	u64 a0, a1;
+	u32 nic_cfg;
+	int wait = 1000;
+
+	vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
+		rss_hash_type, rss_hash_bits, rss_base_cpu,
+		rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
+
+	a0 = nic_cfg;
+	a1 = 0;
+
+	return vnic_dev_cmd(enic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
+}
+
+void enic_free_vnic_resources(struct enic *enic)
+{
+	unsigned int i;
+
+	for (i = 0; i < enic->wq_count; i++)
+		vnic_wq_free(&enic->wq[i]);
+	for (i = 0; i < enic->rq_count; i++)
+		vnic_rq_free(&enic->rq[i]);
+	for (i = 0; i < enic->cq_count; i++)
+		vnic_cq_free(&enic->cq[i]);
+	for (i = 0; i < enic->intr_count; i++)
+		vnic_intr_free(&enic->intr[i]);
+}
+
+void enic_get_res_counts(struct enic *enic)
+{
+	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);
+
+	printk(KERN_INFO PFX "vNIC resources avail: "
+		"wq %d rq %d cq %d intr %d\n",
+		enic->wq_count, enic->rq_count,
+		enic->cq_count, enic->intr_count);
+}
+
+void enic_init_vnic_resources(struct enic *enic)
+{
+	enum vnic_dev_intr_mode intr_mode;
+	unsigned int mask_on_assertion;
+	unsigned int interrupt_offset;
+	unsigned int error_interrupt_enable;
+	unsigned int error_interrupt_offset;
+	unsigned int cq_index;
+	unsigned int i;
+
+	intr_mode = vnic_dev_get_intr_mode(enic->vdev);
+
+	/* Init RQ/WQ resources.
+	 *
+	 * RQ[0 - n-1] point to CQ[0 - n-1]
+	 * WQ[0 - m-1] point to CQ[n - n+m-1]
+	 *
+	 * Error interrupt is not enabled for MSI.
+	 */
+
+	switch (intr_mode) {
+	case VNIC_DEV_INTR_MODE_INTX:
+	case VNIC_DEV_INTR_MODE_MSIX:
+		error_interrupt_enable = 1;
+		error_interrupt_offset = enic->intr_count - 2;
+		break;
+	default:
+		error_interrupt_enable = 0;
+		error_interrupt_offset = 0;
+		break;
+	}
+
+	for (i = 0; i < enic->rq_count; i++) {
+		cq_index = i;
+		vnic_rq_init(&enic->rq[i],
+			cq_index,
+			error_interrupt_enable,
+			error_interrupt_offset);
+	}
+
+	for (i = 0; i < enic->wq_count; i++) {
+		cq_index = enic->rq_count + i;
+		vnic_wq_init(&enic->wq[i],
+			cq_index,
+			error_interrupt_enable,
+			error_interrupt_offset);
+	}
+
+	/* Init CQ resources
+	 *
+	 * CQ[0 - n+m-1] point to INTR[0] for INTx, MSI
+	 * CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X
+	 */
+
+	for (i = 0; i < enic->cq_count; i++) {
+
+		switch (intr_mode) {
+		case VNIC_DEV_INTR_MODE_MSIX:
+			interrupt_offset = i;
+			break;
+		default:
+			interrupt_offset = 0;
+			break;
+		}
+
+		vnic_cq_init(&enic->cq[i],
+			0 /* flow_control_enable */,
+			1 /* color_enable */,
+			0 /* cq_head */,
+			0 /* cq_tail */,
+			1 /* cq_tail_color */,
+			1 /* interrupt_enable */,
+			1 /* cq_entry_enable */,
+			0 /* cq_message_enable */,
+			interrupt_offset,
+			0 /* cq_message_addr */);
+	}
+
+	/* Init INTR resources
+	 *
+	 * mask_on_assertion is not used for INTx due to the level-
+	 * triggered nature of INTx
+	 */
+
+	switch (intr_mode) {
+	case VNIC_DEV_INTR_MODE_MSI:
+	case VNIC_DEV_INTR_MODE_MSIX:
+		mask_on_assertion = 1;
+		break;
+	default:
+		mask_on_assertion = 0;
+		break;
+	}
+
+	for (i = 0; i < enic->intr_count; i++) {
+		vnic_intr_init(&enic->intr[i],
+			enic->config.intr_timer,
+			enic->config.intr_timer_type,
+			mask_on_assertion);
+	}
+
+	/* Clear LIF stats
+	 */
+
+	vnic_dev_stats_clear(enic->vdev);
+}
+
+int enic_alloc_vnic_resources(struct enic *enic)
+{
+	enum vnic_dev_intr_mode intr_mode;
+	unsigned int i;
+	int err;
+
+	intr_mode = vnic_dev_get_intr_mode(enic->vdev);
+
+	printk(KERN_INFO PFX "vNIC resources used:  "
+		"wq %d rq %d cq %d intr %d intr mode %s\n",
+		enic->wq_count, enic->rq_count,
+		enic->cq_count, enic->intr_count,
+		intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
+		intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
+		intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
+		"unknown"
+		);
+
+	/* Allocate queue resources
+	 */
+
+	for (i = 0; i < enic->wq_count; i++) {
+		err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i,
+			enic->config.wq_desc_count,
+			sizeof(struct wq_enet_desc));
+		if (err)
+			goto err_out_cleanup;
+	}
+
+	for (i = 0; i < enic->rq_count; i++) {
+		err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i,
+			enic->config.rq_desc_count,
+			sizeof(struct rq_enet_desc));
+		if (err)
+			goto err_out_cleanup;
+	}
+
+	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));
+		else
+			err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
+				enic->config.wq_desc_count,
+				sizeof(struct cq_enet_wq_desc));
+		if (err)
+			goto err_out_cleanup;
+	}
+
+	for (i = 0; i < enic->intr_count; i++) {
+		err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
+		if (err)
+			goto err_out_cleanup;
+	}
+
+	/* Hook remaining resource
+	 */
+
+	enic->legacy_pba = vnic_dev_get_res(enic->vdev,
+		RES_TYPE_INTR_PBA_LEGACY, 0);
+	if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
+		printk(KERN_ERR PFX "Failed to hook legacy pba resource\n");
+		err = -ENODEV;
+		goto err_out_cleanup;
+	}
+
+	return 0;
+
+err_out_cleanup:
+	enic_free_vnic_resources(enic);
+
+	return err;
+}