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);