Re: [PATCH v4] drm/nouveau: use tile_mode and pte_kind for VM_BIND bo allocations

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Hi Mohamed,

Thank you for fixing this up!

On 5/9/24 22:43, Mohamed Ahmed wrote:
Allows PTE kind and tile mode on BO create with VM_BIND,
and adds a GETPARAM to indicate this change. This is needed to support

It's usually better to use imperative verb form for commit messages. No
need to send a new version though.

modifiers in NVK and ensure correctness when dealing with the nouveau
GL driver.

The userspace modifiers implementation this is for can be found here:
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24795

Fixes: b88baab82871 ("drm/nouveau: implement new VM_BIND uAPI")
Signed-off-by: Mohamed Ahmed <mohamedahmedegypt2001@xxxxxxxxx>

Applied to drm-misc-next-fixes.

Generally, please make sure to use scripts/get_maintainer.pl before sending
patches.

- Danilo

---
  drivers/gpu/drm/nouveau/nouveau_abi16.c |  3 ++
  drivers/gpu/drm/nouveau/nouveau_bo.c    | 44 +++++++++++--------------
  include/uapi/drm/nouveau_drm.h          |  7 ++++
  3 files changed, 29 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_abi16.c b/drivers/gpu/drm/nouveau/nouveau_abi16.c
index 80f74ee0f..47e53e17b 100644
--- a/drivers/gpu/drm/nouveau/nouveau_abi16.c
+++ b/drivers/gpu/drm/nouveau/nouveau_abi16.c
@@ -272,6 +272,9 @@ nouveau_abi16_ioctl_getparam(ABI16_IOCTL_ARGS)
  		getparam->value = (u64)ttm_resource_manager_usage(vram_mgr);
  		break;
  	}
+	case NOUVEAU_GETPARAM_HAS_VMA_TILEMODE:
+		getparam->value = 1;
+		break;
  	default:
  		NV_PRINTK(dbg, cli, "unknown parameter %lld\n", getparam->param);
  		return -EINVAL;
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index db8cbf615..186add400 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -241,28 +241,28 @@ nouveau_bo_alloc(struct nouveau_cli *cli, u64 *size, int *align, u32 domain,
  	}
nvbo->contig = !(tile_flags & NOUVEAU_GEM_TILE_NONCONTIG);
-	if (!nouveau_cli_uvmm(cli) || internal) {
-		/* for BO noVM allocs, don't assign kinds */
-		if (cli->device.info.family >= NV_DEVICE_INFO_V0_FERMI) {
-			nvbo->kind = (tile_flags & 0x0000ff00) >> 8;
-			if (!nvif_mmu_kind_valid(mmu, nvbo->kind)) {
-				kfree(nvbo);
-				return ERR_PTR(-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 ERR_PTR(-EINVAL);
-			}
-		} else {
-			nvbo->zeta = (tile_flags & 0x00000007);
+	if (cli->device.info.family >= NV_DEVICE_INFO_V0_FERMI) {
+		nvbo->kind = (tile_flags & 0x0000ff00) >> 8;
+		if (!nvif_mmu_kind_valid(mmu, nvbo->kind)) {
+			kfree(nvbo);
+			return ERR_PTR(-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 ERR_PTR(-EINVAL);
  		}
-		nvbo->mode = tile_mode;
+	} else {
+		nvbo->zeta = (tile_flags & 0x00000007);
+	}
+	nvbo->mode = tile_mode;
+ if (!nouveau_cli_uvmm(cli) || internal) {
  		/* Determine the desirable target GPU page size for the buffer. */
  		for (i = 0; i < vmm->page_nr; i++) {
  			/* Because we cannot currently allow VMM maps to fail
@@ -304,12 +304,6 @@ nouveau_bo_alloc(struct nouveau_cli *cli, u64 *size, int *align, u32 domain,
  		}
  		nvbo->page = vmm->page[pi].shift;
  	} else {
-		/* reject other tile flags when in VM mode. */
-		if (tile_mode)
-			return ERR_PTR(-EINVAL);
-		if (tile_flags & ~NOUVEAU_GEM_TILE_NONCONTIG)
-			return ERR_PTR(-EINVAL);
-
  		/* Determine the desirable target GPU page size for the buffer. */
  		for (i = 0; i < vmm->page_nr; i++) {
  			/* Because we cannot currently allow VMM maps to fail
diff --git a/include/uapi/drm/nouveau_drm.h b/include/uapi/drm/nouveau_drm.h
index cd84227f1..5402f77ee 100644
--- a/include/uapi/drm/nouveau_drm.h
+++ b/include/uapi/drm/nouveau_drm.h
@@ -68,6 +68,13 @@ extern "C" {
   */
  #define NOUVEAU_GETPARAM_VRAM_USED 19
+/*
+ * NOUVEAU_GETPARAM_HAS_VMA_TILEMODE
+ *
+ * Query whether tile mode and PTE kind are accepted with VM allocs or not.
+ */
+#define NOUVEAU_GETPARAM_HAS_VMA_TILEMODE 20
+
  struct drm_nouveau_getparam {
  	__u64 param;
  	__u64 value;




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