diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_agp.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_agp.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_agp.c b/drivers/gpu/drm/nouveau/nouveau_agp.c deleted file mode 100644 index 6e7a55f93a85..000000000000 --- a/drivers/gpu/drm/nouveau/nouveau_agp.c +++ /dev/null @@ -1,164 +0,0 @@ -#include <linux/module.h> - -#include <core/device.h> - -#include "nouveau_drm.h" -#include "nouveau_agp.h" -#include "nouveau_reg.h" - -#if __OS_HAS_AGP -MODULE_PARM_DESC(agpmode, "AGP mode (0 to disable AGP)"); -static int nouveau_agpmode = -1; -module_param_named(agpmode, nouveau_agpmode, int, 0400); - -static unsigned long -get_agp_mode(struct nouveau_drm *drm, unsigned long mode) -{ - struct nouveau_device *device = nv_device(drm->device); - - /* - * FW seems to be broken on nv18, it makes the card lock up - * randomly. - */ - if (device->chipset == 0x18) - mode &= ~PCI_AGP_COMMAND_FW; - - /* - * AGP mode set in the command line. - */ - if (nouveau_agpmode > 0) { - bool agpv3 = mode & 0x8; - int rate = agpv3 ? nouveau_agpmode / 4 : nouveau_agpmode; - - mode = (mode & ~0x7) | (rate & 0x7); - } - - return mode; -} - -static bool -nouveau_agp_enabled(struct nouveau_drm *drm) -{ - struct drm_device *dev = drm->dev; - - if (!drm_pci_device_is_agp(dev) || !dev->agp) - return false; - - if (drm->agp.stat == UNKNOWN) { - if (!nouveau_agpmode) - return false; -#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 - * the GATT somehow, making them quite painful to deal - * with... - */ - if (nouveau_agpmode == -1) - return false; -#endif - return true; - } - - return (drm->agp.stat == ENABLED); -} -#endif - -void -nouveau_agp_reset(struct nouveau_drm *drm) -{ -#if __OS_HAS_AGP - struct nouveau_device *device = nv_device(drm->device); - struct drm_device *dev = drm->dev; - u32 save[2]; - int ret; - - if (!nouveau_agp_enabled(drm)) - return; - - /* 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 ((nv_rd32(device, NV04_PBUS_PCI_NV_19) | - dev->agp->mode) & PCI_AGP_COMMAND_FW) { - struct drm_agp_info info; - struct drm_agp_mode mode; - - ret = drm_agp_info(dev, &info); - if (ret) - return; - - mode.mode = get_agp_mode(drm, info.mode); - mode.mode &= ~PCI_AGP_COMMAND_FW; - - ret = drm_agp_enable(dev, mode); - if (ret) - return; - } - - - /* clear busmaster bit, and disable AGP */ - save[0] = nv_mask(device, NV04_PBUS_PCI_NV_1, 0x00000004, 0x00000000); - nv_wr32(device, NV04_PBUS_PCI_NV_19, 0); - - /* reset PGRAPH, PFIFO and PTIMER */ - save[1] = nv_mask(device, 0x000200, 0x00011100, 0x00000000); - nv_mask(device, 0x000200, 0x00011100, save[1]); - - /* and restore bustmaster bit (gives effect of resetting AGP) */ - nv_wr32(device, NV04_PBUS_PCI_NV_1, save[0]); -#endif -} - -void -nouveau_agp_init(struct nouveau_drm *drm) -{ -#if __OS_HAS_AGP - struct nouveau_device *device = nv_device(drm->device); - struct drm_device *dev = drm->dev; - struct drm_agp_info info; - struct drm_agp_mode mode; - int ret; - - if (!nouveau_agp_enabled(drm)) - return; - drm->agp.stat = DISABLE; - - ret = drm_agp_acquire(dev); - if (ret) { - nv_error(device, "unable to acquire AGP: %d\n", ret); - return; - } - - ret = drm_agp_info(dev, &info); - if (ret) { - nv_error(device, "unable to get AGP info: %d\n", ret); - return; - } - - /* see agp.h for the AGPSTAT_* modes available */ - mode.mode = get_agp_mode(drm, info.mode); - - ret = drm_agp_enable(dev, mode); - if (ret) { - nv_error(device, "unable to enable AGP: %d\n", ret); - return; - } - - drm->agp.stat = ENABLED; - drm->agp.base = info.aperture_base; - drm->agp.size = info.aperture_size; -#endif -} - -void -nouveau_agp_fini(struct nouveau_drm *drm) -{ -#if __OS_HAS_AGP - struct drm_device *dev = drm->dev; - if (dev->agp && dev->agp->acquired) - drm_agp_release(dev); -#endif -} |