From 27e6c7d33835e7f347cdfb5025766b7d9a6596d1 Mon Sep 17 00:00:00 2001 From: Scott Feldman Date: Thu, 3 Sep 2009 17:01:53 +0000 Subject: 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 Signed-off-by: David S. Miller --- drivers/net/enic/vnic_dev.c | 41 +++++++++++++++++++++++++++++++++-------- 1 file changed, 33 insertions(+), 8 deletions(-) (limited to 'drivers/net/enic/vnic_dev.c') diff --git a/drivers/net/enic/vnic_dev.c b/drivers/net/enic/vnic_dev.c index e21b9d636ae..d5c28efedd9 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); -- cgit v1.2.3