From: Ben Skeggs <bskeggs@redhat.com>
Date: Tue, 31 Oct 2017 17:56:19 +0000 (+1000)
Subject: drm/nouveau: check kind validity against mmu object
X-Git-Tag: v4.15-rc1~90^2~14^2~15
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=a220dd73215be28285f6c90355abbe9e21974c77;p=linux.git

drm/nouveau: check kind validity against mmu object

This is already handled in the top-level gem_new() ioctl in another manner,
but this will be removed in a future commit.

Ideally we'd not need to check up-front at all, and let the VMM code handle
error checking, but there are paths in the current BO management code where
this isn't possible due to map() not always being called during BO creation,
and map() calls not being allowed to fail during buffer migration.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 5ccbd98bfafd..8aa2bc6f78fb 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -189,6 +189,7 @@ nouveau_bo_new(struct nouveau_cli *cli, u64 size, int align,
 {
 	struct nouveau_drm *drm = cli->drm;
 	struct nouveau_bo *nvbo;
+	struct nvif_mmu *mmu = &cli->mmu;
 	size_t acc_size;
 	int ret;
 	int type = ttm_bo_type_device;
@@ -215,11 +216,20 @@ nouveau_bo_new(struct nouveau_cli *cli, u64 size, int align,
 
 	if (cli->device.info.family >= NV_DEVICE_INFO_V0_FERMI) {
 		nvbo->kind = (tile_flags & 0x0000ff00) >> 8;
-		nvbo->comp = gf100_pte_storage_type_map[nvbo->kind] != nvbo->kind;
+		if (!nvif_mmu_kind_valid(mmu, nvbo->kind)) {
+			kfree(nvbo);
+			return -EINVAL;
+		}
+
+		nvbo->comp = mmu->kind[nvbo->kind] != nvbo->kind;
 	} else
 	if (cli->device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
 		nvbo->kind = (tile_flags & 0x00007f00) >> 8;
 		nvbo->comp = (tile_flags & 0x00030000) >> 16;
+		if (!nvif_mmu_kind_valid(mmu, nvbo->kind)) {
+			kfree(nvbo);
+			return -EINVAL;
+		}
 	} else {
 		nvbo->zeta = (tile_flags & 0x00000007);
 	}
@@ -232,7 +242,7 @@ nouveau_bo_new(struct nouveau_cli *cli, u64 size, int align,
 			nvbo->page = drm->client.vm->mmu->lpg_shift;
 		else {
 			if (cli->device.info.family >= NV_DEVICE_INFO_V0_FERMI)
-				nvbo->kind = gf100_pte_storage_type_map[nvbo->kind];
+				nvbo->kind = mmu->kind[nvbo->kind];
 			nvbo->comp = 0;
 		}
 	}