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vfio: support PCI ioport

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Include vfio map/rd/wr support for pci ioport.

Signed-off-by: Santosh Shukla <sshukla@mvista.com>
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
Acked-by: David Marchand <david.marchand@6wind.com>
Reviewed-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
This commit is contained in:
Santosh Shukla 2016-02-21 19:48:01 +05:30 committed by Thomas Monjalon
parent c5d8315f97
commit c316ed45bd
1 changed files with 24 additions and 12 deletions
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36
lib/librte_eal/linuxapp/eal/eal_pci_vfio.c
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@ -74,6 +74,7 @@ EAL_REGISTER_TAILQ(rte_vfio_tailq)
#define VFIO_GROUP_FMT "/dev/vfio/%u"
#define VFIO_NOIOMMU_GROUP_FMT "/dev/vfio/noiommu-%u"
#define VFIO_GET_REGION_ADDR(x) ((uint64_t) x << 40ULL)
#define VFIO_GET_REGION_IDX(x) (x >> 40)
/* per-process VFIO config */
static struct vfio_config vfio_cfg;
@ -999,30 +1000,41 @@ int
pci_vfio_ioport_map(struct rte_pci_device *dev, int bar,
struct rte_pci_ioport *p)
{
RTE_SET_USED(dev);
RTE_SET_USED(bar);
RTE_SET_USED(p);
return -1;
if (bar < VFIO_PCI_BAR0_REGION_INDEX ||
bar > VFIO_PCI_BAR5_REGION_INDEX) {
RTE_LOG(ERR, EAL, "invalid bar (%d)!\n", bar);
return -1;
}
p->dev = dev;
p->base = VFIO_GET_REGION_ADDR(bar);
return 0;
}
void
pci_vfio_ioport_read(struct rte_pci_ioport *p,
void *data, size_t len, off_t offset)
{
RTE_SET_USED(p);
RTE_SET_USED(data);
RTE_SET_USED(len);
RTE_SET_USED(offset);
const struct rte_intr_handle *intr_handle = &p->dev->intr_handle;
if (pread64(intr_handle->vfio_dev_fd, data,
len, p->base + offset) <= 0)
RTE_LOG(ERR, EAL,
"Can't read from PCI bar (%" PRIu64 ") : offset (%x)\n",
VFIO_GET_REGION_IDX(p->base), (int)offset);
}
void
pci_vfio_ioport_write(struct rte_pci_ioport *p,
const void *data, size_t len, off_t offset)
{
RTE_SET_USED(p);
RTE_SET_USED(data);
RTE_SET_USED(len);
RTE_SET_USED(offset);
const struct rte_intr_handle *intr_handle = &p->dev->intr_handle;
if (pwrite64(intr_handle->vfio_dev_fd, data,
len, p->base + offset) <= 0)
RTE_LOG(ERR, EAL,
"Can't write to PCI bar (%" PRIu64 ") : offset (%x)\n",
VFIO_GET_REGION_IDX(p->base), (int)offset);
}
int