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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>
This commit is contained in:
Scott Feldman 2009-09-03 17:01:53 +00:00 committed by David S. Miller
parent 1a123a3168
commit 27e6c7d338
4 changed files with 66 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/enic/enic.h
View File

@ -33,13 +33,15 @@
#define DRV_NAME "enic"
#define DRV_DESCRIPTION "Cisco 10G Ethernet Driver"
#define DRV_VERSION "1.0.0.933"
#define DRV_COPYRIGHT "Copyright 2008 Cisco Systems, Inc"
#define DRV_VERSION "1.1.0.100"
#define DRV_COPYRIGHT "Copyright 2008-2009 Cisco Systems, Inc"
#define PFX DRV_NAME ": "
#define ENIC_LRO_MAX_DESC 8
#define ENIC_LRO_MAX_AGGR 64
#define ENIC_BARS_MAX 6
enum enic_cq_index {
ENIC_CQ_RQ,
ENIC_CQ_WQ,
@ -73,7 +75,7 @@ struct enic {
struct net_device *netdev;
struct pci_dev *pdev;
struct vnic_enet_config config;
struct vnic_dev_bar bar0;
struct vnic_dev_bar bar[ENIC_BARS_MAX];
struct vnic_dev *vdev;
struct timer_list notify_timer;
struct work_struct reset;

48
drivers/net/enic/enic_main.c
View File

@ -1609,12 +1609,6 @@ static void enic_clear_intr_mode(struct enic *enic)
vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
}
static void enic_iounmap(struct enic *enic)
{
if (enic->bar0.vaddr)
iounmap(enic->bar0.vaddr);
}
static const struct net_device_ops enic_netdev_ops = {
.ndo_open = enic_open,
.ndo_stop = enic_stop,
@ -1633,6 +1627,15 @@ static const struct net_device_ops enic_netdev_ops = {
#endif
};
static void enic_iounmap(struct enic *enic)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
if (enic->bar[i].vaddr)
iounmap(enic->bar[i].vaddr);
}
static int __devinit enic_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
@ -1710,31 +1713,28 @@ static int __devinit enic_probe(struct pci_dev *pdev,
using_dac = 1;
}
/* Map vNIC resources from BAR0
/* Map vNIC resources from BAR0-5
*/
if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
printk(KERN_ERR PFX
"BAR0 not memory-map'able, aborting.\n");
err = -ENODEV;
goto err_out_release_regions;
}
enic->bar0.vaddr = pci_iomap(pdev, 0, enic->bar0.len);
enic->bar0.bus_addr = pci_resource_start(pdev, 0);
enic->bar0.len = pci_resource_len(pdev, 0);
if (!enic->bar0.vaddr) {
printk(KERN_ERR PFX
"Cannot memory-map BAR0 res hdr, aborting.\n");
err = -ENODEV;
goto err_out_release_regions;
for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
continue;
enic->bar[i].len = pci_resource_len(pdev, i);
enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
if (!enic->bar[i].vaddr) {
printk(KERN_ERR PFX
"Cannot memory-map BAR %d, aborting.\n", i);
err = -ENODEV;
goto err_out_iounmap;
}
enic->bar[i].bus_addr = pci_resource_start(pdev, i);
}
/* Register vNIC device
*/
enic->vdev = vnic_dev_register(NULL, enic, pdev, &enic->bar0);
enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
ARRAY_SIZE(enic->bar));
if (!enic->vdev) {
printk(KERN_ERR PFX
"vNIC registration failed, aborting.\n");

41
drivers/net/enic/vnic_dev.c
View File

@ -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);

5
drivers/net/enic/vnic_dev.h
View File

@ -75,6 +75,8 @@ unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
enum vnic_res_type type);
void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
unsigned int index);
dma_addr_t vnic_dev_get_res_bus_addr(struct vnic_dev *vdev,
enum vnic_res_type type, unsigned int index);
unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
unsigned int desc_count, unsigned int desc_size);
void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring);
@ -117,6 +119,7 @@ void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
enum vnic_dev_intr_mode vnic_dev_get_intr_mode(struct vnic_dev *vdev);
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);
#endif /* _VNIC_DEV_H_ */