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Message-ID: <20251006191329.277485-2-mohamedahmedegypt2001@gmail.com>
Date: Mon, 6 Oct 2025 22:13:24 +0300
From: Mohamed Ahmed <mohamedahmedegypt2001@...il.com>
To: linux-kernel@...r.kernel.org
Cc: dri-devel@...ts.freedesktop.org,
Mary Guillemard <mary@...y.zone>,
Faith Ekstrand <faith.ekstrand@...labora.com>,
Mohamed Ahmed <mohamedahmedegypt2001@...il.com>,
Lyude Paul <lyude@...hat.com>,
Danilo Krummrich <dakr@...nel.org>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>,
Simona Vetter <simona@...ll.ch>,
nouveau@...ts.freedesktop.org
Subject: [PATCH 1/5] drm/nouveau/uvmm: Prepare for larger pages
From: Mary Guillemard <mary@...y.zone>
Currently memory allocated by VM_BIND uAPI can only have a granuality
matching PAGE_SIZE (4KiB in common case)
To have a better memory management and to allow big (64KiB) and huge
(2MiB) pages later in the serie, we are now passing the page shift all
around the internals of UVMM.
Co-developed-by: Mohamed Ahmed <mohamedahmedegypt2001@...il.com>
Signed-off-by: Mohamed Ahmed <mohamedahmedegypt2001@...il.com>
Signed-off-by: Mary Guillemard <mary@...y.zone>
---
drivers/gpu/drm/nouveau/nouveau_uvmm.c | 55 ++++++++++++++++----------
drivers/gpu/drm/nouveau/nouveau_uvmm.h | 1 +
2 files changed, 35 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_uvmm.c b/drivers/gpu/drm/nouveau/nouveau_uvmm.c
index 79eefdfd08a2..a92c729600d6 100644
--- a/drivers/gpu/drm/nouveau/nouveau_uvmm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_uvmm.c
@@ -107,34 +107,34 @@ nouveau_uvmm_vmm_sparse_unref(struct nouveau_uvmm *uvmm,
static int
nouveau_uvmm_vmm_get(struct nouveau_uvmm *uvmm,
- u64 addr, u64 range)
+ u64 addr, u64 range, u8 page_shift)
{
struct nvif_vmm *vmm = &uvmm->vmm.vmm;
- return nvif_vmm_raw_get(vmm, addr, range, PAGE_SHIFT);
+ return nvif_vmm_raw_get(vmm, addr, range, page_shift);
}
static int
nouveau_uvmm_vmm_put(struct nouveau_uvmm *uvmm,
- u64 addr, u64 range)
+ u64 addr, u64 range, u8 page_shift)
{
struct nvif_vmm *vmm = &uvmm->vmm.vmm;
- return nvif_vmm_raw_put(vmm, addr, range, PAGE_SHIFT);
+ return nvif_vmm_raw_put(vmm, addr, range, page_shift);
}
static int
nouveau_uvmm_vmm_unmap(struct nouveau_uvmm *uvmm,
- u64 addr, u64 range, bool sparse)
+ u64 addr, u64 range, u8 page_shift, bool sparse)
{
struct nvif_vmm *vmm = &uvmm->vmm.vmm;
- return nvif_vmm_raw_unmap(vmm, addr, range, PAGE_SHIFT, sparse);
+ return nvif_vmm_raw_unmap(vmm, addr, range, page_shift, sparse);
}
static int
nouveau_uvmm_vmm_map(struct nouveau_uvmm *uvmm,
- u64 addr, u64 range,
+ u64 addr, u64 range, u8 page_shift,
u64 bo_offset, u8 kind,
struct nouveau_mem *mem)
{
@@ -163,7 +163,7 @@ nouveau_uvmm_vmm_map(struct nouveau_uvmm *uvmm,
return -ENOSYS;
}
- return nvif_vmm_raw_map(vmm, addr, range, PAGE_SHIFT,
+ return nvif_vmm_raw_map(vmm, addr, range, page_shift,
&args, argc,
&mem->mem, bo_offset);
}
@@ -182,8 +182,9 @@ nouveau_uvma_vmm_put(struct nouveau_uvma *uvma)
{
u64 addr = uvma->va.va.addr;
u64 range = uvma->va.va.range;
+ u8 page_shift = uvma->page_shift;
- return nouveau_uvmm_vmm_put(to_uvmm(uvma), addr, range);
+ return nouveau_uvmm_vmm_put(to_uvmm(uvma), addr, range, page_shift);
}
static int
@@ -193,9 +194,11 @@ nouveau_uvma_map(struct nouveau_uvma *uvma,
u64 addr = uvma->va.va.addr;
u64 offset = uvma->va.gem.offset;
u64 range = uvma->va.va.range;
+ u8 page_shift = uvma->page_shift;
return nouveau_uvmm_vmm_map(to_uvmm(uvma), addr, range,
- offset, uvma->kind, mem);
+ page_shift, offset, uvma->kind,
+ mem);
}
static int
@@ -203,12 +206,13 @@ nouveau_uvma_unmap(struct nouveau_uvma *uvma)
{
u64 addr = uvma->va.va.addr;
u64 range = uvma->va.va.range;
+ u8 page_shift = uvma->page_shift;
bool sparse = !!uvma->region;
if (drm_gpuva_invalidated(&uvma->va))
return 0;
- return nouveau_uvmm_vmm_unmap(to_uvmm(uvma), addr, range, sparse);
+ return nouveau_uvmm_vmm_unmap(to_uvmm(uvma), addr, range, page_shift, sparse);
}
static int
@@ -501,7 +505,8 @@ nouveau_uvmm_sm_prepare_unwind(struct nouveau_uvmm *uvmm,
if (vmm_get_range)
nouveau_uvmm_vmm_put(uvmm, vmm_get_start,
- vmm_get_range);
+ vmm_get_range,
+ PAGE_SHIFT);
break;
}
case DRM_GPUVA_OP_REMAP: {
@@ -528,6 +533,7 @@ nouveau_uvmm_sm_prepare_unwind(struct nouveau_uvmm *uvmm,
u64 ustart = va->va.addr;
u64 urange = va->va.range;
u64 uend = ustart + urange;
+ u8 page_shift = uvma_from_va(va)->page_shift;
/* Nothing to do for mappings we merge with. */
if (uend == vmm_get_start ||
@@ -538,7 +544,8 @@ nouveau_uvmm_sm_prepare_unwind(struct nouveau_uvmm *uvmm,
u64 vmm_get_range = ustart - vmm_get_start;
nouveau_uvmm_vmm_put(uvmm, vmm_get_start,
- vmm_get_range);
+ vmm_get_range,
+ page_shift);
}
vmm_get_start = uend;
break;
@@ -581,7 +588,8 @@ static int
op_map_prepare(struct nouveau_uvmm *uvmm,
struct nouveau_uvma **puvma,
struct drm_gpuva_op_map *op,
- struct uvmm_map_args *args)
+ struct uvmm_map_args *args,
+ u8 page_shift)
{
struct nouveau_uvma *uvma;
int ret;
@@ -592,6 +600,7 @@ op_map_prepare(struct nouveau_uvmm *uvmm,
uvma->region = args->region;
uvma->kind = args->kind;
+ uvma->page_shift = page_shift;
drm_gpuva_map(&uvmm->base, &uvma->va, op);
@@ -627,13 +636,14 @@ nouveau_uvmm_sm_prepare(struct nouveau_uvmm *uvmm,
case DRM_GPUVA_OP_MAP: {
u64 vmm_get_range = vmm_get_end - vmm_get_start;
- ret = op_map_prepare(uvmm, &new->map, &op->map, args);
+ ret = op_map_prepare(uvmm, &new->map, &op->map, args, PAGE_SHIFT);
if (ret)
goto unwind;
if (vmm_get_range) {
ret = nouveau_uvmm_vmm_get(uvmm, vmm_get_start,
- vmm_get_range);
+ vmm_get_range,
+ new->map->page_shift);
if (ret) {
op_map_prepare_unwind(new->map);
goto unwind;
@@ -657,7 +667,7 @@ nouveau_uvmm_sm_prepare(struct nouveau_uvmm *uvmm,
if (r->prev) {
ret = op_map_prepare(uvmm, &new->prev, r->prev,
- &remap_args);
+ &remap_args, uvma_from_va(va)->page_shift);
if (ret)
goto unwind;
@@ -667,7 +677,7 @@ nouveau_uvmm_sm_prepare(struct nouveau_uvmm *uvmm,
if (r->next) {
ret = op_map_prepare(uvmm, &new->next, r->next,
- &remap_args);
+ &remap_args, uvma_from_va(va)->page_shift);
if (ret) {
if (r->prev)
op_map_prepare_unwind(new->prev);
@@ -689,6 +699,7 @@ nouveau_uvmm_sm_prepare(struct nouveau_uvmm *uvmm,
u64 ustart = va->va.addr;
u64 urange = va->va.range;
u64 uend = ustart + urange;
+ u8 page_shift = uvma_from_va(va)->page_shift;
op_unmap_prepare(u);
@@ -704,7 +715,7 @@ nouveau_uvmm_sm_prepare(struct nouveau_uvmm *uvmm,
u64 vmm_get_range = ustart - vmm_get_start;
ret = nouveau_uvmm_vmm_get(uvmm, vmm_get_start,
- vmm_get_range);
+ vmm_get_range, page_shift);
if (ret) {
op_unmap_prepare_unwind(va);
goto unwind;
@@ -799,10 +810,11 @@ op_unmap_range(struct drm_gpuva_op_unmap *u,
u64 addr, u64 range)
{
struct nouveau_uvma *uvma = uvma_from_va(u->va);
+ u8 page_shift = uvma->page_shift;
bool sparse = !!uvma->region;
if (!drm_gpuva_invalidated(u->va))
- nouveau_uvmm_vmm_unmap(to_uvmm(uvma), addr, range, sparse);
+ nouveau_uvmm_vmm_unmap(to_uvmm(uvma), addr, range, page_shift, sparse);
}
static void
@@ -882,6 +894,7 @@ nouveau_uvmm_sm_cleanup(struct nouveau_uvmm *uvmm,
struct drm_gpuva_op_map *n = r->next;
struct drm_gpuva *va = r->unmap->va;
struct nouveau_uvma *uvma = uvma_from_va(va);
+ u8 page_shift = uvma->page_shift;
if (unmap) {
u64 addr = va->va.addr;
@@ -893,7 +906,7 @@ nouveau_uvmm_sm_cleanup(struct nouveau_uvmm *uvmm,
if (n)
end = n->va.addr;
- nouveau_uvmm_vmm_put(uvmm, addr, end - addr);
+ nouveau_uvmm_vmm_put(uvmm, addr, end - addr, page_shift);
}
nouveau_uvma_gem_put(uvma);
diff --git a/drivers/gpu/drm/nouveau/nouveau_uvmm.h b/drivers/gpu/drm/nouveau/nouveau_uvmm.h
index 9d3c348581eb..51925711ae90 100644
--- a/drivers/gpu/drm/nouveau/nouveau_uvmm.h
+++ b/drivers/gpu/drm/nouveau/nouveau_uvmm.h
@@ -33,6 +33,7 @@ struct nouveau_uvma {
struct nouveau_uvma_region *region;
u8 kind;
+ u8 page_shift;
};
#define uvmm_from_gpuvm(x) container_of((x), struct nouveau_uvmm, base)
--
2.51.0
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