diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c new file mode 100644 index 000000000..385a90f91 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/agp.c @@ -0,0 +1,175 @@ +/* + * Copyright 2015 Nouveau Project + * + * 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. + */ +#include "agp.h" +#ifdef __NVKM_PCI_AGP_H__ +#include <core/option.h> + +struct nvkm_device_agp_quirk { + u16 hostbridge_vendor; + u16 hostbridge_device; + u16 chip_vendor; + u16 chip_device; + int mode; +}; + +static const struct nvkm_device_agp_quirk +nvkm_device_agp_quirks[] = { + /* VIA Apollo PRO133x / GeForce FX 5600 Ultra - fdo#20341 */ + { PCI_VENDOR_ID_VIA, 0x0691, PCI_VENDOR_ID_NVIDIA, 0x0311, 2 }, + /* SiS 761 does not support AGP cards, use PCI mode */ + { PCI_VENDOR_ID_SI, 0x0761, PCI_ANY_ID, PCI_ANY_ID, 0 }, + {}, +}; + +void +nvkm_agp_fini(struct nvkm_pci *pci) +{ + if (pci->agp.acquired) { + agp_backend_release(pci->agp.bridge); + pci->agp.acquired = false; + } +} + +/* Ensure AGP controller is in a consistent state in case we need to + * execute the VBIOS DEVINIT scripts. + */ +void +nvkm_agp_preinit(struct nvkm_pci *pci) +{ + struct nvkm_device *device = pci->subdev.device; + u32 mode = nvkm_pci_rd32(pci, 0x004c); + u32 save[2]; + + /* First of all, disable fast writes, otherwise if it's already + * enabled in the AGP bridge and we disable the card's AGP + * controller we might be locking ourselves out of it. + */ + if ((mode | pci->agp.mode) & PCI_AGP_COMMAND_FW) { + mode = pci->agp.mode & ~PCI_AGP_COMMAND_FW; + agp_enable(pci->agp.bridge, mode); + } + + /* clear busmaster bit, and disable AGP */ + save[0] = nvkm_pci_rd32(pci, 0x0004); + nvkm_pci_wr32(pci, 0x0004, save[0] & ~0x00000004); + nvkm_pci_wr32(pci, 0x004c, 0x00000000); + + /* reset PGRAPH, PFIFO and PTIMER */ + save[1] = nvkm_mask(device, 0x000200, 0x00011100, 0x00000000); + nvkm_mask(device, 0x000200, 0x00011100, save[1]); + + /* and restore busmaster bit (gives effect of resetting AGP) */ + nvkm_pci_wr32(pci, 0x0004, save[0]); +} + +int +nvkm_agp_init(struct nvkm_pci *pci) +{ + if (!agp_backend_acquire(pci->pdev)) { + nvkm_error(&pci->subdev, "failed to acquire agp\n"); + return -ENODEV; + } + + agp_enable(pci->agp.bridge, pci->agp.mode); + pci->agp.acquired = true; + return 0; +} + +void +nvkm_agp_dtor(struct nvkm_pci *pci) +{ + arch_phys_wc_del(pci->agp.mtrr); +} + +void +nvkm_agp_ctor(struct nvkm_pci *pci) +{ + const struct nvkm_device_agp_quirk *quirk = nvkm_device_agp_quirks; + struct nvkm_subdev *subdev = &pci->subdev; + struct nvkm_device *device = subdev->device; + struct agp_kern_info info; + int mode = -1; + +#ifdef __powerpc__ + /* Disable AGP by default on all PowerPC machines for now -- At + * least some UniNorth-2 AGP bridges are known to be broken: + * DMA from the host to the card works just fine, but writeback + * from the card to the host goes straight to memory + * untranslated bypassing that GATT somehow, making them quite + * painful to deal with... + */ + mode = 0; +#endif + mode = nvkm_longopt(device->cfgopt, "NvAGP", mode); + + /* acquire bridge temporarily, so that we can copy its info */ + if (!(pci->agp.bridge = agp_backend_acquire(pci->pdev))) { + nvkm_warn(subdev, "failed to acquire agp\n"); + return; + } + agp_copy_info(pci->agp.bridge, &info); + agp_backend_release(pci->agp.bridge); + + pci->agp.mode = info.mode; + pci->agp.base = info.aper_base; + pci->agp.size = info.aper_size * 1024 * 1024; + pci->agp.cma = info.cant_use_aperture; + pci->agp.mtrr = -1; + + /* determine if bridge + chipset combination needs a workaround */ + while (quirk->hostbridge_vendor) { + if (info.device->vendor == quirk->hostbridge_vendor && + info.device->device == quirk->hostbridge_device && + (quirk->chip_vendor == (u16)PCI_ANY_ID || + pci->pdev->vendor == quirk->chip_vendor) && + (quirk->chip_device == (u16)PCI_ANY_ID || + pci->pdev->device == quirk->chip_device)) { + nvkm_info(subdev, "forcing default agp mode to %dX, " + "use NvAGP=<mode> to override\n", + quirk->mode); + mode = quirk->mode; + break; + } + quirk++; + } + + /* apply quirk / user-specified mode */ + if (mode >= 1) { + if (pci->agp.mode & 0x00000008) + mode /= 4; /* AGPv3 */ + pci->agp.mode &= ~0x00000007; + pci->agp.mode |= (mode & 0x7); + } else + if (mode == 0) { + pci->agp.bridge = NULL; + return; + } + + /* fast writes appear to be broken on nv18, they make the card + * lock up randomly. + */ + if (device->chipset == 0x18) + pci->agp.mode &= ~PCI_AGP_COMMAND_FW; + + pci->agp.mtrr = arch_phys_wc_add(pci->agp.base, pci->agp.size); +} +#endif |