diff options
Diffstat (limited to 'kernel/drivers/gpu/drm/nouveau/nvkm/subdev/pci/g84.c')
-rw-r--r-- | kernel/drivers/gpu/drm/nouveau/nvkm/subdev/pci/g84.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/pci/g84.c b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/pci/g84.c new file mode 100644 index 000000000..3faa6bfb8 --- /dev/null +++ b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/pci/g84.c @@ -0,0 +1,64 @@ +/* + * Copyright 2015 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Ben Skeggs <bskeggs@redhat.com> + */ +#include "priv.h" + +#include <core/pci.h> + +void +g84_pci_init(struct nvkm_pci *pci) +{ + /* The following only concerns PCIe cards. */ + if (!pci_is_pcie(pci->pdev)) + return; + + /* Tag field is 8-bit long, regardless of EXT_TAG. + * However, if EXT_TAG is disabled, only the lower 5 bits of the tag + * field should be used, limiting the number of request to 32. + * + * Apparently, 0x041c stores some limit on the number of requests + * possible, so if EXT_TAG is disabled, limit that requests number to + * 32 + * + * Fixes fdo#86537 + */ + if (nvkm_pci_rd32(pci, 0x007c) & 0x00000020) + nvkm_pci_mask(pci, 0x0080, 0x00000100, 0x00000100); + else + nvkm_pci_mask(pci, 0x041c, 0x00000060, 0x00000000); +} + +static const struct nvkm_pci_func +g84_pci_func = { + .init = g84_pci_init, + .rd32 = nv40_pci_rd32, + .wr08 = nv40_pci_wr08, + .wr32 = nv40_pci_wr32, + .msi_rearm = nv46_pci_msi_rearm, +}; + +int +g84_pci_new(struct nvkm_device *device, int index, struct nvkm_pci **ppci) +{ + return nvkm_pci_new_(&g84_pci_func, device, index, ppci); +} |