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>
diff --git a/drivers/net/enic/vnic_dev.c b/drivers/net/enic/vnic_dev.c
index e21b9d6..d5c28ef 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 @@
}
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 @@
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 @@
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 @@
}
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 @@
}
}
+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 @@
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 @@
}
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 @@
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);