diff options
| author | Pierre Moreau <pierre.morrow@free.fr> | 2015-10-03 22:35:16 +0300 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2015-11-03 08:02:18 +0300 |
| commit | 5d5b43f59bd214506265ea05a013229ff5291101 (patch) | |
| tree | 48fc6b851325191454ab5404af6608e61aa3898f /drivers/gpu/drm/drm_ioctl.c | |
| parent | 354a22496613366833edfe29300a6bfe6482255c (diff) | |
| download | linux-5d5b43f59bd214506265ea05a013229ff5291101.tar.xz | |
drm/nouveau/pci: Handle 5-bit and 8-bit tag field
If the hardware supports extended tag field (8-bit ones), then enable it.
This is usually done by the VBIOS, but not on some MBPs (see fdo#86537).
In case extended tag field is not supported, 5-bit tag field is used which
limits the possible number of requests to 32. Apparently bits 7:0 of
0x08841c stores some number of outstanding requests, so cap it to 32 if
extended tag is unsupported.
Fixes: fdo#86537
v2: Restrict changes to chipsets >= 0x84
v3:
* Add nvkm_pci_mask to pci.h
* Mask bit 8 before setting it
v4:
* Rename `add` argument of nvkm_pci_mask to `value`
* Move code from nvkm_pci_init to g84_pci_init and remove PCIe and chipset
checks
v5:
* Rebase code on latest PCI structure
* Restore PCIe check
* Fix namings in nvkm_pci_mask
* Rephrase part of the commit message
Signed-off-by: Pierre Moreau <pierre.morrow@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_ioctl.c')
0 files changed, 0 insertions, 0 deletions