Merge branch 'linux-4.15' of git://github.com/skeggsb/linux into drm-fixes

nouveau regression fixes, and some minor fixes.

* 'linux-4.15' of git://github.com/skeggsb/linux:
  drm/nouveau: use alternate memory type for system-memory buffers with kind != 0
  drm/nouveau: avoid GPU page sizes > PAGE_SIZE for buffer objects in host memory
  drm/nouveau/mmu/gp10b: use correct implementation
  drm/nouveau/pci: do a msi rearm on init
  drm/nouveau/imem/nv50: fix refcount_t warning
  drm/nouveau/bios/dp: support DP Info Table 2.0
  drm/nouveau/fbcon: fix NULL pointer access in nouveau_fbcon_destroy

drivers/gpu/drm/nouveau/nouveau_bo.c

@@ -224,7 +224,7 @@ nouveau_bo_new(struct nouveau_cli *cli, u64 size, int align,
 		/* Determine if we can get a cache-coherent map, forcing
 		 * uncached mapping if we can't.
 		 */
-		if (mmu->type[drm->ttm.type_host].type & NVIF_MEM_UNCACHED)
+		if (!nouveau_drm_use_coherent_gpu_mapping(drm))
 			nvbo->force_coherent = true;
 	}
 
@@ -262,7 +262,8 @@ nouveau_bo_new(struct nouveau_cli *cli, u64 size, int align,
 		if (cli->device.info.family > NV_DEVICE_INFO_V0_CURIE &&
 		    (flags & TTM_PL_FLAG_VRAM) && !vmm->page[i].vram)
 			continue;
-		if ((flags & TTM_PL_FLAG_TT  ) && !vmm->page[i].host)
+		if ((flags & TTM_PL_FLAG_TT) &&
+		    (!vmm->page[i].host || vmm->page[i].shift > PAGE_SHIFT))
 			continue;
 
 		/* Select this page size if it's the first that supports

drivers/gpu/drm/nouveau/nouveau_drv.h

@@ -157,8 +157,8 @@ struct nouveau_drm {
 		struct nvif_object copy;
 		int mtrr;
 		int type_vram;
-		int type_host;
-		int type_ncoh;
+		int type_host[2];
+		int type_ncoh[2];
 	} ttm;
 
 	/* GEM interface support */
@@ -217,6 +217,13 @@ nouveau_drm(struct drm_device *dev)
 	return dev->dev_private;
 }
 
+static inline bool
+nouveau_drm_use_coherent_gpu_mapping(struct nouveau_drm *drm)
+{
+	struct nvif_mmu *mmu = &drm->client.mmu;
+	return !(mmu->type[drm->ttm.type_host[0]].type & NVIF_MEM_UNCACHED);
+}
+
 int nouveau_pmops_suspend(struct device *);
 int nouveau_pmops_resume(struct device *);
 bool nouveau_pmops_runtime(void);

drivers/gpu/drm/nouveau/nouveau_fbcon.c

@@ -429,7 +429,7 @@ nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon)
 	drm_fb_helper_unregister_fbi(&fbcon->helper);
 	drm_fb_helper_fini(&fbcon->helper);
 
-	if (nouveau_fb->nvbo) {
+	if (nouveau_fb && nouveau_fb->nvbo) {
 		nouveau_vma_del(&nouveau_fb->vma);
 		nouveau_bo_unmap(nouveau_fb->nvbo);
 		nouveau_bo_unpin(nouveau_fb->nvbo);

drivers/gpu/drm/nouveau/nouveau_mem.c

@@ -103,10 +103,10 @@ nouveau_mem_host(struct ttm_mem_reg *reg, struct ttm_dma_tt *tt)
 	u8 type;
 	int ret;
 
-	if (mmu->type[drm->ttm.type_host].type & NVIF_MEM_UNCACHED)
-		type = drm->ttm.type_ncoh;
+	if (!nouveau_drm_use_coherent_gpu_mapping(drm))
+		type = drm->ttm.type_ncoh[!!mem->kind];
 	else
-		type = drm->ttm.type_host;
+		type = drm->ttm.type_host[0];
 
 	if (mem->kind && !(mmu->type[type].type & NVIF_MEM_KIND))
 		mem->comp = mem->kind = 0;

drivers/gpu/drm/nouveau/nouveau_ttm.c

@@ -235,27 +235,46 @@ nouveau_ttm_global_release(struct nouveau_drm *drm)
 	drm->ttm.mem_global_ref.release = NULL;
 }
 
-int
-nouveau_ttm_init(struct nouveau_drm *drm)
+static int
+nouveau_ttm_init_host(struct nouveau_drm *drm, u8 kind)
 {
-	struct nvkm_device *device = nvxx_device(&drm->client.device);
-	struct nvkm_pci *pci = device->pci;
 	struct nvif_mmu *mmu = &drm->client.mmu;
-	struct drm_device *dev = drm->dev;
-	int typei, ret;
+	int typei;
 
 	typei = nvif_mmu_type(mmu, NVIF_MEM_HOST | NVIF_MEM_MAPPABLE |
-						   NVIF_MEM_COHERENT);
+					    kind | NVIF_MEM_COHERENT);
 	if (typei < 0)
 		return -ENOSYS;
 
-	drm->ttm.type_host = typei;
+	drm->ttm.type_host[!!kind] = typei;
 
-	typei = nvif_mmu_type(mmu, NVIF_MEM_HOST | NVIF_MEM_MAPPABLE);
+	typei = nvif_mmu_type(mmu, NVIF_MEM_HOST | NVIF_MEM_MAPPABLE | kind);
 	if (typei < 0)
 		return -ENOSYS;
 
-	drm->ttm.type_ncoh = typei;
+	drm->ttm.type_ncoh[!!kind] = typei;
+	return 0;
+}
+
+int
+nouveau_ttm_init(struct nouveau_drm *drm)
+{
+	struct nvkm_device *device = nvxx_device(&drm->client.device);
+	struct nvkm_pci *pci = device->pci;
+	struct nvif_mmu *mmu = &drm->client.mmu;
+	struct drm_device *dev = drm->dev;
+	int typei, ret;
+
+	ret = nouveau_ttm_init_host(drm, 0);
+	if (ret)
+		return ret;
+
+	if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA &&
+	    drm->client.device.info.chipset != 0x50) {
+		ret = nouveau_ttm_init_host(drm, NVIF_MEM_KIND);
+		if (ret)
+			return ret;
+	}
 
 	if (drm->client.device.info.platform != NV_DEVICE_INFO_V0_SOC &&
 	    drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {

drivers/gpu/drm/nouveau/nvkm/engine/device/base.c

@@ -2369,7 +2369,7 @@ nv13b_chipset = {
 	.imem = gk20a_instmem_new,
 	.ltc = gp100_ltc_new,
 	.mc = gp10b_mc_new,
-	.mmu = gf100_mmu_new,
+	.mmu = gp10b_mmu_new,
 	.secboot = gp10b_secboot_new,
 	.pmu = gm20b_pmu_new,
 	.timer = gk20a_timer_new,

drivers/gpu/drm/nouveau/nvkm/subdev/bios/dp.c

@@ -36,6 +36,7 @@ nvbios_dp_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
 			if (data) {
 				*ver = nvbios_rd08(bios, data + 0x00);
 				switch (*ver) {
+				case 0x20:
 				case 0x21:
 				case 0x30:
 				case 0x40:
@@ -63,6 +64,7 @@ nvbios_dpout_entry(struct nvkm_bios *bios, u8 idx,
 	if (data && idx < *cnt) {
 		u16 outp = nvbios_rd16(bios, data + *hdr + idx * *len);
 		switch (*ver * !!outp) {
+		case 0x20:
 		case 0x21:
 		case 0x30:
 			*hdr = nvbios_rd08(bios, data + 0x04);
@@ -96,11 +98,15 @@ nvbios_dpout_parse(struct nvkm_bios *bios, u8 idx,
 		info->type = nvbios_rd16(bios, data + 0x00);
 		info->mask = nvbios_rd16(bios, data + 0x02);
 		switch (*ver) {
+		case 0x20:
+			info->mask |= 0x00c0; /* match any link */
+			/* fall-through */
 		case 0x21:
 		case 0x30:
 			info->flags     = nvbios_rd08(bios, data + 0x05);
 			info->script[0] = nvbios_rd16(bios, data + 0x06);
 			info->script[1] = nvbios_rd16(bios, data + 0x08);
+			if (*len >= 0x0c)
 				info->lnkcmp    = nvbios_rd16(bios, data + 0x0a);
 			if (*len >= 0x0f) {
 				info->script[2] = nvbios_rd16(bios, data + 0x0c);
@@ -170,6 +176,7 @@ nvbios_dpcfg_parse(struct nvkm_bios *bios, u16 outp, u8 idx,
 	memset(info, 0x00, sizeof(*info));
 	if (data) {
 		switch (*ver) {
+		case 0x20:
 		case 0x21:
 			info->dc    = nvbios_rd08(bios, data + 0x02);
 			info->pe    = nvbios_rd08(bios, data + 0x03);

drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c

@@ -249,7 +249,7 @@ nv50_instobj_acquire(struct nvkm_memory *memory)
 			iobj->base.memory.ptrs = &nv50_instobj_fast;
 		else
 			iobj->base.memory.ptrs = &nv50_instobj_slow;
-		refcount_inc(&iobj->maps);
+		refcount_set(&iobj->maps, 1);
 	}
 
 	mutex_unlock(&imem->subdev.mutex);

drivers/gpu/drm/nouveau/nvkm/subdev/pci/base.c

@@ -136,6 +136,13 @@ nvkm_pci_init(struct nvkm_subdev *subdev)
 		return ret;
 
 	pci->irq = pdev->irq;
+
+	/* Ensure MSI interrupts are armed, for the case where there are
+	 * already interrupts pending (for whatever reason) at load time.
+	 */
+	if (pci->msi)
+		pci->func->msi_rearm(pci);
+
 	return ret;
 }