--- /dev/null
+#include <linux/module.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);
+
+struct nouveau_agpmode_quirk {
+ u16 hostbridge_vendor;
+ u16 hostbridge_device;
+ u16 chip_vendor;
+ u16 chip_device;
+ int mode;
+};
+
+static struct nouveau_agpmode_quirk nouveau_agpmode_quirk_list[] = {
+ /* VIA Apollo PRO133x / GeForce FX 5600 Ultra, max agpmode 2, fdo #20341 */
+ { PCI_VENDOR_ID_VIA, 0x0691, PCI_VENDOR_ID_NVIDIA, 0x0311, 2 },
+
+ {},
+};
+
+static unsigned long
+get_agp_mode(struct nouveau_drm *drm, const struct drm_agp_info *info)
+{
+ struct nvif_device *device = &drm->device;
+ struct nouveau_agpmode_quirk *quirk = nouveau_agpmode_quirk_list;
+ int agpmode = nouveau_agpmode;
+ unsigned long mode = info->mode;
+
+ /*
+ * FW seems to be broken on nv18, it makes the card lock up
+ * randomly.
+ */
+ if (device->info.chipset == 0x18)
+ mode &= ~PCI_AGP_COMMAND_FW;
+
+ /*
+ * Go through the quirks list and adjust the agpmode accordingly.
+ */
+ while (agpmode == -1 && quirk->hostbridge_vendor) {
+ if (info->id_vendor == quirk->hostbridge_vendor &&
+ info->id_device == quirk->hostbridge_device &&
+ nvxx_device(device)->pdev->vendor == quirk->chip_vendor &&
+ nvxx_device(device)->pdev->device == quirk->chip_device) {
+ agpmode = quirk->mode;
+ NV_INFO(drm, "Forcing agp mode to %dX. Use agpmode to override.\n",
+ agpmode);
+ break;
+ }
+ ++quirk;
+ }
+
+ /*
+ * AGP mode set in the command line.
+ */
+ if (agpmode > 0) {
+ bool agpv3 = mode & 0x8;
+ int rate = agpv3 ? agpmode / 4 : agpmode;
+
+ mode = (mode & ~0x7) | (rate & 0x7);
+ }
+
+ return mode;
+}
+
+static bool
+nouveau_agp_enabled(struct nouveau_drm *drm)
+{
+ struct drm_device *dev = drm->dev;
+
+ if (!dev->pdev || !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 nvif_device *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 ((nvif_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 &= ~PCI_AGP_COMMAND_FW;
+
+ ret = drm_agp_enable(dev, mode);
+ if (ret)
+ return;
+ }
+
+
+ /* clear busmaster bit, and disable AGP */
+ save[0] = nvif_mask(device, NV04_PBUS_PCI_NV_1, 0x00000004, 0x00000000);
+ nvif_wr32(device, NV04_PBUS_PCI_NV_19, 0);
+
+ /* reset PGRAPH, PFIFO and PTIMER */
+ save[1] = nvif_mask(device, 0x000200, 0x00011100, 0x00000000);
+ nvif_mask(device, 0x000200, 0x00011100, save[1]);
+
+ /* and restore bustmaster bit (gives effect of resetting AGP) */
+ nvif_wr32(device, NV04_PBUS_PCI_NV_1, save[0]);
+#endif
+}
+
+void
+nouveau_agp_init(struct nouveau_drm *drm)
+{
+#if __OS_HAS_AGP
+ 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(drm, "unable to acquire AGP: %d\n", ret);
+ return;
+ }
+
+ ret = drm_agp_info(dev, &info);
+ if (ret) {
+ NV_ERROR(drm, "unable to get AGP info: %d\n", ret);
+ return;
+ }
+
+ /* see agp.h for the AGPSTAT_* modes available */
+ mode.mode = get_agp_mode(drm, &info);
+
+ ret = drm_agp_enable(dev, mode);
+ if (ret) {
+ NV_ERROR(drm, "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
+}
Code Review / kvmfornfv.git / blobdiff