enic: add support for multiple BARs

Nic firmware can place resources (queues, intrs, etc) on multiple BARs, so
allow driver to discover/map resources beyond BAR0.

Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 33 insertions, 8 deletions

diff --git a/drivers/net/enic/vnic_dev.c b/drivers/net/enic/vnic_dev.c
index e21b9d636aec..d5c28efedd98 100644
--- a/drivers/net/enic/vnic_dev.c
+++ b/drivers/net/enic/vnic_dev.c
@@ -31,6 +31,7 @@
 
 struct vnic_res {
 	void __iomem *vaddr;
+	dma_addr_t bus_addr;
 	unsigned int count;
 };
 
@@ -67,12 +68,15 @@ void *vnic_dev_priv(struct vnic_dev *vdev)
 }
 
 static int vnic_dev_discover_res(struct vnic_dev *vdev,
-	struct vnic_dev_bar *bar)
+	struct vnic_dev_bar *bar, unsigned int num_bars)
 {
 	struct vnic_resource_header __iomem *rh;
 	struct vnic_resource __iomem *r;
 	u8 type;
 
+	if (num_bars == 0)
+		return -EINVAL;
+
 	if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
 		printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
 		return -EINVAL;
@@ -104,7 +108,10 @@ static int vnic_dev_discover_res(struct vnic_dev *vdev,
 
 		r++;
 
-		if (bar_num != 0)  /* only mapping in BAR0 resources */
+		if (bar_num >= num_bars)
+			continue;
+
+		if (!bar[bar_num].len || !bar[bar_num].vaddr)
 			continue;
 
 		switch (type) {
@@ -114,13 +121,13 @@ static int vnic_dev_discover_res(struct vnic_dev *vdev,
 		case RES_TYPE_INTR_CTRL:
 			/* each count is stride bytes long */
 			len = count * VNIC_RES_STRIDE;
-			if (len + bar_offset > bar->len) {
+			if (len + bar_offset > bar[bar_num].len) {
 				printk(KERN_ERR "vNIC BAR0 resource %d "
 					"out-of-bounds, offset 0x%x + "
 					"size 0x%x > bar len 0x%lx\n",
 					type, bar_offset,
 					len,
-					bar->len);
+					bar[bar_num].len);
 				return -EINVAL;
 			}
 			break;
@@ -133,7 +140,9 @@ static int vnic_dev_discover_res(struct vnic_dev *vdev,
 		}
 
 		vdev->res[type].count = count;
-		vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
+		vdev->res[type].vaddr = (char __iomem *)bar[bar_num].vaddr +
+			bar_offset;
+		vdev->res[type].bus_addr = bar[bar_num].bus_addr + bar_offset;
 	}
 
 	return 0;
@@ -163,6 +172,21 @@ void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
 	}
 }
 
+dma_addr_t vnic_dev_get_res_bus_addr(struct vnic_dev *vdev,
+	enum vnic_res_type type, unsigned int index)
+{
+	switch (type) {
+	case RES_TYPE_WQ:
+	case RES_TYPE_RQ:
+	case RES_TYPE_CQ:
+	case RES_TYPE_INTR_CTRL:
+		return vdev->res[type].bus_addr +
+			index * VNIC_RES_STRIDE;
+	default:
+		return vdev->res[type].bus_addr;
+	}
+}
+
 unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
 	unsigned int desc_count, unsigned int desc_size)
 {
@@ -257,7 +281,7 @@ int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
 	iowrite32(cmd, &devcmd->cmd);
 
 	if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
-			return 0;
+		return 0;
 
 	for (delay = 0; delay < wait; delay++) {
 
@@ -684,7 +708,8 @@ void vnic_dev_unregister(struct vnic_dev *vdev)
 }
 
 struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
-	void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
+	void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar,
+	unsigned int num_bars)
 {
 	if (!vdev) {
 		vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
@@ -695,7 +720,7 @@ struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
 	vdev->priv = priv;
 	vdev->pdev = pdev;
 
-	if (vnic_dev_discover_res(vdev, bar))
+	if (vnic_dev_discover_res(vdev, bar, num_bars))
 		goto err_out;
 
 	vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);