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vfio/pci: Pass an error object to vfio_msix_early_setup 

Pass an error object to prepare for migration to VFIO-PCI realize.
The returned value will be removed later on.

We now format an error in case of reading failure for
- the MSIX flags
- the MSIX table,
- the MSIX PBA.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Eric Auger 2016-10-17 10:57:58 -06:00 committed by Alex Williamson
parent 2312d907dd
commit 008d0e2d7b
1 changed files with 8 additions and 5 deletions
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13
hw/vfio/pci.c
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@ -1277,7 +1277,7 @@ static void vfio_pci_fixup_msix_region(VFIOPCIDevice *vdev)
* need to first look for where the MSI-X table lives. So we * need to first look for where the MSI-X table lives. So we
* unfortunately split MSI-X setup across two functions. * unfortunately split MSI-X setup across two functions.
*/ */
static int vfio_msix_early_setup(VFIOPCIDevice *vdev) static int vfio_msix_early_setup(VFIOPCIDevice *vdev, Error **errp)
{ {
uint8_t pos; uint8_t pos;
uint16_t ctrl; uint16_t ctrl;
@ -1292,16 +1292,19 @@ static int vfio_msix_early_setup(VFIOPCIDevice *vdev)
if (pread(fd, &ctrl, sizeof(ctrl), if (pread(fd, &ctrl, sizeof(ctrl),
vdev->config_offset + pos + PCI_MSIX_FLAGS) != sizeof(ctrl)) { vdev->config_offset + pos + PCI_MSIX_FLAGS) != sizeof(ctrl)) {
error_setg_errno(errp, errno, "failed to read PCI MSIX FLAGS");
return -errno; return -errno;
} }
if (pread(fd, &table, sizeof(table), if (pread(fd, &table, sizeof(table),
vdev->config_offset + pos + PCI_MSIX_TABLE) != sizeof(table)) { vdev->config_offset + pos + PCI_MSIX_TABLE) != sizeof(table)) {
error_setg_errno(errp, errno, "failed to read PCI MSIX TABLE");
return -errno; return -errno;
} }
if (pread(fd, &pba, sizeof(pba), if (pread(fd, &pba, sizeof(pba),
vdev->config_offset + pos + PCI_MSIX_PBA) != sizeof(pba)) { vdev->config_offset + pos + PCI_MSIX_PBA) != sizeof(pba)) {
error_setg_errno(errp, errno, "failed to read PCI MSIX PBA");
return -errno; return -errno;
} }
@ -1332,8 +1335,8 @@ static int vfio_msix_early_setup(VFIOPCIDevice *vdev)
(vdev->device_id & 0xff00) == 0x5800) { (vdev->device_id & 0xff00) == 0x5800) {
msix->pba_offset = 0x1000; msix->pba_offset = 0x1000;
} else { } else {
error_report("vfio: Hardware reports invalid configuration, " error_setg(errp, "hardware reports invalid configuration, "
"MSIX PBA outside of specified BAR"); "MSIX PBA outside of specified BAR");
g_free(msix); g_free(msix);
return -EINVAL; return -EINVAL;
} }
@ -2657,9 +2660,9 @@ static int vfio_initfn(PCIDevice *pdev)
vfio_pci_size_rom(vdev); vfio_pci_size_rom(vdev);
ret = vfio_msix_early_setup(vdev); ret = vfio_msix_early_setup(vdev, &err);
if (ret) { if (ret) {
return ret; goto error;
} }
vfio_bars_setup(vdev); vfio_bars_setup(vdev);