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SubjectRe: [PATCH 9/9] drm/vmwgfx: Add surface dirty-tracking callbacks
Date
Minor nits below

Reviewed-by: Deepak Rawat <drawat@vmware.com>

On Fri, 2019-04-12 at 16:04 +0000, Thomas Hellstrom wrote:
> Add the callbacks necessary to implement emulated coherent memory for
> surfaces. Add a flag to the gb_surface_create ioctl to indicate that
> surface memory should be coherent.
> Also bump the drm minor version to signal the availability of
> coherent
> surfaces.
>
> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
> ---
> .../device_include/svga3d_surfacedefs.h | 209 +++++++++-
> drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 4 +-
> drivers/gpu/drm/vmwgfx/vmwgfx_surface.c | 390
> +++++++++++++++++-
> include/uapi/drm/vmwgfx_drm.h | 4 +-
> 4 files changed, 600 insertions(+), 7 deletions(-)
>
> diff --git
> a/drivers/gpu/drm/vmwgfx/device_include/svga3d_surfacedefs.h
> b/drivers/gpu/drm/vmwgfx/device_include/svga3d_surfacedefs.h
> index f2bfd3d80598..d901206c04e3 100644
> --- a/drivers/gpu/drm/vmwgfx/device_include/svga3d_surfacedefs.h
> +++ b/drivers/gpu/drm/vmwgfx/device_include/svga3d_surfacedefs.h
> @@ -1280,7 +1280,6 @@
> svga3dsurface_get_pixel_offset(SVGA3dSurfaceFormat format,
> return offset;
> }
>
> -
> static inline u32
> svga3dsurface_get_image_offset(SVGA3dSurfaceFormat format,
> surf_size_struct baseLevelSize,
> @@ -1375,4 +1374,212 @@
> svga3dsurface_is_screen_target_format(SVGA3dSurfaceFormat format)
> return svga3dsurface_is_dx_screen_target_format(format);
> }
>
> +/**
> + * struct svga3dsurface_mip - Mimpmap level information
> + * @bytes: Bytes required in the backing store of this mipmap level.
> + * @img_stride: Byte stride per image.
> + * @row_stride: Byte stride per block row.
> + * @size: The size of the mipmap.
> + */
> +struct svga3dsurface_mip {
> + size_t bytes;
> + size_t img_stride;
> + size_t row_stride;
> + struct drm_vmw_size size;
> +
> +};
> +
> +/**
> + * struct svga3dsurface_cache - Cached surface information
> + * @desc: Pointer to the surface descriptor
> + * @mip: Array of mipmap level information. Valid size is
> @num_mip_levels.
> + * @mip_chain_bytes: Bytes required in the backing store for the
> whole chain
> + * of mip levels.
> + * @num_mip_levels: Valid size of the @mip array. Number of mipmap
> levels in
> + * a chain.
> + * @num_layers: Number of slices in an array texture or number of
> faces in
> + * a cubemap texture.
> + */
> +struct svga3dsurface_cache {
> + const struct svga3d_surface_desc *desc;
> + struct svga3dsurface_mip mip[DRM_VMW_MAX_MIP_LEVELS];
> + size_t mip_chain_bytes;
> + u32 num_mip_levels;
> + u32 num_layers;
> +};
> +
> +/**
> + * struct svga3dsurface_loc - Surface location
> + * @sub_resource: Surface subresource. Defined as layer *
> num_mip_levels +
> + * mip_level.
> + * @x: X coordinate.
> + * @y: Y coordinate.
> + * @z: Z coordinate.
> + */
> +struct svga3dsurface_loc {
> + u32 sub_resource;
> + u32 x, y, z;
> +};
> +
> +/**
> + * svga3dsurface_subres - Compute the subresource from layer and
> mipmap.
> + * @cache: Surface layout data.
> + * @mip_level: The mipmap level.
> + * @layer: The surface layer (face or array slice).
> + *
> + * Return: The subresource.
> + */
> +static inline u32 svga3dsurface_subres(const struct
> svga3dsurface_cache *cache,
> + u32 mip_level, u32 layer)
> +{
> + return cache->num_mip_levels * layer + mip_level;
> +}
> +
> +/**
> + * svga3dsurface_setup_cache - Build a surface cache entry
> + * @size: The surface base level dimensions.
> + * @format: The surface format.
> + * @num_mip_levels: Number of mipmap levels.
> + * @num_layers: Number of layers.
> + * @cache: Pointer to a struct svga3dsurface_cach object to be
> filled in.
> + */
> +static inline void svga3dsurface_setup_cache(const struct
> drm_vmw_size *size,
> + SVGA3dSurfaceFormat
> format,
> + u32 num_mip_levels,
> + u32 num_layers,
> + u32 num_samples,
> + struct svga3dsurface_cache
> *cache)
> +{
> + const struct svga3d_surface_desc *desc;
> + u32 i;
> +
> + memset(cache, 0, sizeof(*cache));
> + cache->desc = desc = svga3dsurface_get_desc(format);
> + cache->num_mip_levels = num_mip_levels;
> + cache->num_layers = num_layers;
> + for (i = 0; i < cache->num_mip_levels; i++) {
> + struct svga3dsurface_mip *mip = &cache->mip[i];
> +
> + mip->size = svga3dsurface_get_mip_size(*size, i);
> + mip->bytes = svga3dsurface_get_image_buffer_size
> + (desc, &mip->size, 0) * num_samples;
> + mip->row_stride =
> + __KERNEL_DIV_ROUND_UP(mip->size.width,
> + desc->block_size.width) *
> + desc->bytes_per_block * num_samples;
> + mip->img_stride =
> + __KERNEL_DIV_ROUND_UP(mip->size.height,
> + desc->block_size.height)
> *
> + mip->row_stride;
> + cache->mip_chain_bytes += mip->bytes;
> + }
> +}
> +
> +/**
> + * svga3dsurface_get_loc - Get a surface location from an offset
> into the
> + * backing store
> + * @cache: Surface layout data.
> + * @loc: Pointer to a struct svga3dsurface_loc to be filled in.
> + * @offset: Offset into the surface backing store.
> + */
> +static inline void
> +svga3dsurface_get_loc(const struct svga3dsurface_cache *cache,
> + struct svga3dsurface_loc *loc,
> + size_t offset)
> +{
> + u32 layer = offset / cache->mip_chain_bytes;
> + const struct svga3dsurface_mip *mip = &cache->mip[0];
> + const struct svga3d_surface_desc *desc = cache->desc;
> + int i;
> +
> + offset -= layer * cache->mip_chain_bytes;
> + for (i = 0; i < cache->num_mip_levels; ++i, ++mip) {
> + if (mip->bytes > offset)
> + break;
> + offset -= mip->bytes;
> + }
> +
> + loc->sub_resource = svga3dsurface_subres(cache, i, layer);
> + loc->z = offset / mip->img_stride;
> + offset -= loc->z * mip->img_stride;
> + loc->z *= desc->block_size.depth;
> + loc->y = offset / mip->row_stride;
> + offset -= loc->y * mip->row_stride;
> + loc->y *= desc->block_size.height;
> + loc->x = offset / desc->bytes_per_block;
> + loc->x *= desc->block_size.width;
> +}
> +
> +/**
> + * svga3dsurface_inc_loc - Clamp increment a surface location with
> one block
> + * size
> + * in each dimension.
> + * @loc: Pointer to a struct svga3dsurface_loc to be incremented.
> + *
> + * When computing the size of a range as size = end - start, the
> range does not
> + * include the end element. However a location representing the last
> byte
> + * of a touched region in the backing store *is* included in the
> range.
> + * This function motifies such a location to match the end

/s/motifies/modifies

> definition
> + * given as start + size which is the one used in a SVGA3dBox.
> + */
> +static inline void
> +svga3dsurface_inc_loc(const struct svga3dsurface_cache *cache,
> + struct svga3dsurface_loc *loc)
> +{
> + const struct svga3d_surface_desc *desc = cache->desc;
> + u32 mip = loc->sub_resource % cache->num_mip_levels;
> + const struct drm_vmw_size *size = &cache->mip[mip].size;
> +
> + loc->sub_resource++;
> + loc->x += desc->block_size.width;
> + if (loc->x > size->width)
> + loc->x = size->width;
> + loc->y += desc->block_size.height;
> + if (loc->y > size->height)
> + loc->y = size->height;
> + loc->z += desc->block_size.depth;
> + if (loc->z > size->depth)
> + loc->z = size->depth;
> +}
> +
> +/**
> + * svga3dsurface_min_loc - The start location in a subresorce

/s/subresorce/subresource

> + * @cache: Surface layout data.
> + * @sub_resource: The subresource.
> + * @loc: Pointer to a struct svga3dsurface_loc to be filled in.
> + */
> +static inline void
> +svga3dsurface_min_loc(const struct svga3dsurface_cache *cache,
> + u32 sub_resource,
> + struct svga3dsurface_loc *loc)
> +{
> + loc->sub_resource = sub_resource;
> + loc->x = loc->y = loc->z = 0;
> +}
> +
> +/**
> + * svga3dsurface_min_loc - The end location in a subresorce

svga3dsurface_max_loc. Also /s/subresorce/subresource

> + * @cache: Surface layout data.
> + * @sub_resource: The subresource.
> + * @loc: Pointer to a struct svga3dsurface_loc to be filled in.
> + *
> + * Following the end definition given in svga3dsurface_inc_loc(),
> + * Compute the end location of a surface subresource.
> + */
> +static inline void
> +svga3dsurface_max_loc(const struct svga3dsurface_cache *cache,
> + u32 sub_resource,
> + struct svga3dsurface_loc *loc)
> +{
> + const struct drm_vmw_size *size;
> + u32 mip;
> +
> + loc->sub_resource = sub_resource + 1;
> + mip = sub_resource % cache->num_mip_levels;
> + size = &cache->mip[mip].size;
> + loc->x = size->width;
> + loc->y = size->height;
> + loc->z = size->depth;
> +}
> +
> #endif /* _SVGA3D_SURFACEDEFS_H_ */
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
> b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
> index 00794415335e..630a01d75a41 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
> @@ -44,9 +44,9 @@
> #include <linux/sync_file.h>
>
> #define VMWGFX_DRIVER_NAME "vmwgfx"
> -#define VMWGFX_DRIVER_DATE "20180704"
> +#define VMWGFX_DRIVER_DATE "20190328"
> #define VMWGFX_DRIVER_MAJOR 2
> -#define VMWGFX_DRIVER_MINOR 15
> +#define VMWGFX_DRIVER_MINOR 16
> #define VMWGFX_DRIVER_PATCHLEVEL 0
> #define VMWGFX_FILE_PAGE_OFFSET 0x00100000
> #define VMWGFX_FIFO_STATIC_SIZE (1024*1024)
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
> b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
> index c40d44f4d9af..f56141529da5 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
> @@ -68,6 +68,20 @@ struct vmw_surface_offset {
> uint32_t bo_offset;
> };
>
> +/**
> + * vmw_surface_dirty - Surface dirty-tracker
> + * @cache: Cached layout information of the surface.
> + * @size: Accounting size for the struct vmw_surface_dirty.
> + * @num_subres: Number of subresources.
> + * @boxes: Array of SVGA3dBoxes indicating dirty regions. One per
> subresource.
> + */
> +struct vmw_surface_dirty {
> + struct svga3dsurface_cache cache;
> + size_t size;
> + u32 num_subres;
> + SVGA3dBox boxes[0];
> +};
> +
> static void vmw_user_surface_free(struct vmw_resource *res);
> static struct vmw_resource *
> vmw_user_surface_base_to_res(struct ttm_base_object *base);
> @@ -96,6 +110,13 @@ vmw_gb_surface_reference_internal(struct
> drm_device *dev,
> struct drm_vmw_gb_surface_ref_ext_rep
> *rep,
> struct drm_file *file_priv);
>
> +static void vmw_surface_dirty_free(struct vmw_resource *res);
> +static int vmw_surface_dirty_alloc(struct vmw_resource *res);
> +static int vmw_surface_dirty_sync(struct vmw_resource *res);
> +static void vmw_surface_dirty_range_add(struct vmw_resource *res,
> size_t start,
> + size_t end);
> +static int vmw_surface_clean(struct vmw_resource *res);
> +
> static const struct vmw_user_resource_conv user_surface_conv = {
> .object_type = VMW_RES_SURFACE,
> .base_obj_to_res = vmw_user_surface_base_to_res,
> @@ -133,7 +154,12 @@ static const struct vmw_res_func
> vmw_gb_surface_func = {
> .create = vmw_gb_surface_create,
> .destroy = vmw_gb_surface_destroy,
> .bind = vmw_gb_surface_bind,
> - .unbind = vmw_gb_surface_unbind
> + .unbind = vmw_gb_surface_unbind,
> + .dirty_alloc = vmw_surface_dirty_alloc,
> + .dirty_free = vmw_surface_dirty_free,
> + .dirty_sync = vmw_surface_dirty_sync,
> + .dirty_range_add = vmw_surface_dirty_range_add,
> + .clean = vmw_surface_clean,
> };
>
> /**
> @@ -641,6 +667,7 @@ static void vmw_user_surface_free(struct
> vmw_resource *res)
> struct vmw_private *dev_priv = srf->res.dev_priv;
> uint32_t size = user_srf->size;
>
> + WARN_ON_ONCE(res->dirty);
> if (user_srf->master)
> drm_master_put(&user_srf->master);
> kfree(srf->offsets);
> @@ -1174,10 +1201,16 @@ static int vmw_gb_surface_bind(struct
> vmw_resource *res,
> cmd2->header.id = SVGA_3D_CMD_UPDATE_GB_SURFACE;
> cmd2->header.size = sizeof(cmd2->body);
> cmd2->body.sid = res->id;
> - res->backup_dirty = false;
> }
> vmw_fifo_commit(dev_priv, submit_size);
>
> + if (res->backup->dirty && res->backup_dirty) {
> + /* We've just made a full upload. Cear dirty regions.
> */
> + vmw_bo_dirty_clear_res(res);
> + }
> +
> + res->backup_dirty = false;
> +
> return 0;
> }
>
> @@ -1642,7 +1675,8 @@ vmw_gb_surface_define_internal(struct
> drm_device *dev,
> }
> }
> } else if (req->base.drm_surface_flags &
> - drm_vmw_surface_flag_create_buffer)
> + (drm_vmw_surface_flag_create_buffer |
> + drm_vmw_surface_flag_coherent))
> ret = vmw_user_bo_alloc(dev_priv, tfile,
> res->backup_size,
> req->base.drm_surface_flags &
> @@ -1656,6 +1690,26 @@ vmw_gb_surface_define_internal(struct
> drm_device *dev,
> goto out_unlock;
> }
>
> + if (req->base.drm_surface_flags &
> drm_vmw_surface_flag_coherent) {
> + struct vmw_buffer_object *backup = res->backup;
> +
> + ttm_bo_reserve(&backup->base, false, false, NULL);
> + if (!res->func->dirty_alloc)
> + ret = -EINVAL;
> + if (!ret)
> + ret = vmw_bo_dirty_add(backup);
> + if (!ret) {
> + res->coherent = true;
> + ret = res->func->dirty_alloc(res);
> + }
> + ttm_bo_unreserve(&backup->base);
> + if (ret) {
> + vmw_resource_unreference(&res);
> + goto out_unlock;
> + }
> +
> + }
> +
> tmp = vmw_resource_reference(res);
> ret = ttm_prime_object_init(tfile, res->backup_size, &user_srf-
> >prime,
> req->base.drm_surface_flags &
> @@ -1764,3 +1818,333 @@ vmw_gb_surface_reference_internal(struct
> drm_device *dev,
>
> return ret;
> }
> +
> +/**
> + * vmw_subres_dirty_add - Add a dirty region to a subresource
> + * @dirty: The surfaces's dirty tracker.
> + * @loc_start: The location corresponding to the start of the
> region.
> + * @loc_end: The location corresponding to the end of the region.
> + *
> + * As we are assuming that @loc_start and @loc_end represent a
> sequential
> + * range of backing store memory, if the region spans multiple lines
> then
> + * regardless of the x coordinate, the full lines are dirtied.
> + * Correspondingly if the region spans multiple z slices, then full
> rather
> + * than partial z slices are dirtied.
> + */
> +static void vmw_subres_dirty_add(struct vmw_surface_dirty *dirty,
> + const struct svga3dsurface_loc
> *loc_start,
> + const struct svga3dsurface_loc
> *loc_end)
> +{
> + const struct svga3dsurface_cache *cache = &dirty->cache;
> + SVGA3dBox *box = &dirty->boxes[loc_start->sub_resource];
> + u32 mip = loc_start->sub_resource % cache->num_mip_levels;
> + const struct drm_vmw_size *size = &cache->mip[mip].size;
> + u32 box_c2 = box->z + box->d;
> +
> + if (WARN_ON(loc_start->sub_resource >= dirty->num_subres))
> + return;
> +
> + if (box->d == 0 || box->z > loc_start->z)
> + box->z = loc_start->z;
> + if (box_c2 < loc_end->z)
> + box->d = loc_end->z - box->z;
> +
> + if (loc_start->z + 1 == loc_end->z) {
> + box_c2 = box->y + box->h;
> + if (box->h == 0 || box->y > loc_start->y)
> + box->y = loc_start->y;
> + if (box_c2 < loc_end->y)
> + box->h = loc_end->y - box->y;
> +
> + if (loc_start->y + 1 == loc_end->y) {
> + box_c2 = box->x + box->w;
> + if (box->w == 0 || box->x > loc_start->x)
> + box->x = loc_start->x;
> + if (box_c2 < loc_end->x)
> + box->w = loc_end->x - box->x;
> + } else {
> + box->x = 0;
> + box->w = size->width;
> + }
> + } else {
> + box->y = 0;
> + box->h = size->height;
> + box->x = 0;
> + box->w = size->width;
> + }
> +}
> +
> +/**
> + * vmw_subres_dirty_full - Mark a full subresource as dirty
> + * @dirty: The surface's dirty tracker.
> + * @subres: The subresource
> + */
> +static void vmw_subres_dirty_full(struct vmw_surface_dirty *dirty,
> u32 subres)
> +{
> + const struct svga3dsurface_cache *cache = &dirty->cache;
> + u32 mip = subres % cache->num_mip_levels;
> + const struct drm_vmw_size *size = &cache->mip[mip].size;
> + SVGA3dBox *box = &dirty->boxes[subres];
> +
> + box->x = 0;
> + box->y = 0;
> + box->z = 0;
> + box->w = size->width;
> + box->h = size->height;
> + box->d = size->depth;
> +}
> +
> +/*
> + * vmw_surface_tex_dirty_add_range - The dirty_add_range callback
> for texture
> + * surfaces.
> + */
> +static void vmw_surface_tex_dirty_range_add(struct vmw_resource
> *res,
> + size_t start, size_t end)
> +{
> + struct vmw_surface_dirty *dirty =
> + (struct vmw_surface_dirty *) res->dirty;
> + size_t backup_end = res->backup_offset + res->backup_size;
> + struct svga3dsurface_loc loc1, loc2;
> + const struct svga3dsurface_cache *cache;
> +
> + start = max(start, res->backup_offset) - res->backup_offset;
> + end = min(end, backup_end) - res->backup_offset;
> + cache = &dirty->cache;
> + svga3dsurface_get_loc(cache, &loc1, start);
> + svga3dsurface_get_loc(cache, &loc2, end - 1);
> + svga3dsurface_inc_loc(cache, &loc2);
> +
> + if (loc1.sub_resource + 1 == loc2.sub_resource) {
> + /* Dirty range covers a single sub-resource */
> + vmw_subres_dirty_add(dirty, &loc1, &loc2);
> + } else {
> + /* Dirty range covers multiple sub-resources */
> + struct svga3dsurface_loc loc_min, loc_max;
> + u32 sub_res = loc1.sub_resource;
> +
> + svga3dsurface_max_loc(cache, loc1.sub_resource,
> &loc_max);
> + vmw_subres_dirty_add(dirty, &loc1, &loc_max);
> + svga3dsurface_min_loc(cache, loc2.sub_resource - 1,
> &loc_min);
> + vmw_subres_dirty_add(dirty, &loc_min, &loc2);
> + for (sub_res = loc1.sub_resource + 1;
> + sub_res < loc2.sub_resource - 1; ++sub_res)
> + vmw_subres_dirty_full(dirty, sub_res);
> + }
> +}
> +
> +/*
> + * vmw_surface_tex_dirty_add_range - The dirty_add_range callback
> for buffer
> + * surfaces.
> + */
> +static void vmw_surface_buf_dirty_range_add(struct vmw_resource
> *res,
> + size_t start, size_t end)
> +{
> + struct vmw_surface_dirty *dirty =
> + (struct vmw_surface_dirty *) res->dirty;
> + const struct svga3dsurface_cache *cache = &dirty->cache;
> + size_t backup_end = res->backup_offset + cache-
> >mip_chain_bytes;
> + SVGA3dBox *box = &dirty->boxes[0];
> + u32 box_c2;
> +
> + box->h = box->d = 1;
> + start = max(start, res->backup_offset) - res->backup_offset;
> + end = min(end, backup_end) - res->backup_offset;
> + box_c2 = box->x + box->w;
> + if (box->w == 0 || box->x > start)
> + box->x = start;
> + if (box_c2 < end)
> + box->w = end - box->x;
> +}
> +
> +/*
> + * vmw_surface_tex_dirty_add_range - The dirty_add_range callback
> for surfaces
> + */
> +static void vmw_surface_dirty_range_add(struct vmw_resource *res,
> size_t start,
> + size_t end)
> +{
> + struct vmw_surface *srf = vmw_res_to_srf(res);
> +
> + if (WARN_ON(end <= res->backup_offset ||
> + start >= res->backup_offset + res->backup_size))
> + return;
> +
> + if (srf->format == SVGA3D_BUFFER)
> + vmw_surface_buf_dirty_range_add(res, start, end);
> + else
> + vmw_surface_tex_dirty_range_add(res, start, end);
> +}
> +
> +/*
> + * vmw_surface_dirty_sync - The surface's dirty_sync callback.
> + */
> +static int vmw_surface_dirty_sync(struct vmw_resource *res)
> +{
> + struct vmw_private *dev_priv = res->dev_priv;
> + bool has_dx = 0;
> + u32 i, num_dirty;
> + struct vmw_surface_dirty *dirty =
> + (struct vmw_surface_dirty *) res->dirty;
> + size_t alloc_size;
> + const struct svga3dsurface_cache *cache = &dirty->cache;
> + struct {
> + SVGA3dCmdHeader header;
> + SVGA3dCmdDXUpdateSubResource body;
> + } *cmd1;
> + struct {
> + SVGA3dCmdHeader header;
> + SVGA3dCmdUpdateGBImage body;
> + } *cmd2;
> + void *cmd;
> +
> + num_dirty = 0;
> + for (i = 0; i < dirty->num_subres; ++i) {
> + const SVGA3dBox *box = &dirty->boxes[i];
> +
> + if (box->d)
> + num_dirty++;
> + }
> +
> + if (!num_dirty)
> + goto out;
> +
> + alloc_size = num_dirty * ((has_dx) ? sizeof(*cmd1) :
> sizeof(*cmd2));
> + cmd = VMW_FIFO_RESERVE(dev_priv, alloc_size);
> + if (!cmd)
> + return -ENOMEM;
> +
> + cmd1 = cmd;
> + cmd2 = cmd;
> +
> + for (i = 0; i < dirty->num_subres; ++i) {
> + const SVGA3dBox *box = &dirty->boxes[i];
> +
> + if (!box->d)
> + continue;
> +
> + /*
> + * DX_UPDATE_SUBRESOURCE is aware of array surfaces.
> + * UPDATE_GB_IMAGE is not.
> + */
> + if (has_dx) {
> + cmd1->header.id =
> SVGA_3D_CMD_DX_UPDATE_SUBRESOURCE;
> + cmd1->header.size = sizeof(cmd1->body);
> + cmd1->body.sid = res->id;
> + cmd1->body.subResource = i;
> + cmd1->body.box = *box;
> + cmd1++;
> + } else {
> + cmd2->header.id = SVGA_3D_CMD_UPDATE_GB_IMAGE;
> + cmd2->header.size = sizeof(cmd2->body);
> + cmd2->body.image.sid = res->id;
> + cmd2->body.image.face = i / cache-
> >num_mip_levels;
> + cmd2->body.image.mipmap = i -
> + (cache->num_mip_levels * cmd2-
> >body.image.face);
> + cmd2->body.box = *box;
> + cmd2++;
> + }
> +
> + }
> + vmw_fifo_commit(dev_priv, alloc_size);
> + out:
> + memset(&dirty->boxes[0], 0, sizeof(dirty->boxes[0]) *
> + dirty->num_subres);
> +
> + return 0;
> +}
> +
> +/*
> + * vmw_surface_dirty_alloc - The surface's dirty_alloc callback.
> + */
> +static int vmw_surface_dirty_alloc(struct vmw_resource *res)
> +{
> + struct vmw_surface *srf = vmw_res_to_srf(res);
> + struct vmw_surface_dirty *dirty;
> + u32 num_layers = 1;
> + u32 num_mip;
> + u32 num_subres;
> + u32 num_samples;
> + size_t dirty_size, acc_size;
> + static struct ttm_operation_ctx ctx = {
> + .interruptible = false,
> + .no_wait_gpu = false
> + };
> + int ret;
> +
> + if (srf->array_size)
> + num_layers = srf->array_size;
> + else if (srf->flags & SVGA3D_SURFACE_CUBEMAP)
> + num_layers *= SVGA3D_MAX_SURFACE_FACES;
> +
> + num_mip = srf->mip_levels[0];
> + if (!num_mip)
> + num_mip = 1;
> +
> + num_subres = num_layers * num_mip;
> + dirty_size = sizeof(*dirty) + num_subres * sizeof(dirty-
> >boxes[0]);
> + acc_size = ttm_round_pot(dirty_size);
> + ret = ttm_mem_global_alloc(vmw_mem_glob(res->dev_priv),
> + acc_size, &ctx);
> + if (ret) {
> + VMW_DEBUG_USER("Out of graphics memory for surface "
> + "dirty tracker.\n");
> + return ret;
> + }
> +
> + dirty = kvzalloc(dirty_size, GFP_KERNEL);
> + if (!dirty) {
> + ret = -ENOMEM;
> + goto out_no_dirty;
> + }
> +
> + num_samples = max_t(u32, 1, srf->multisample_count);
> + svga3dsurface_setup_cache(&srf->base_size, srf->format,
> num_mip,
> + num_layers, num_samples, &dirty-
> >cache);
> + dirty->num_subres = num_subres;
> + dirty->size = acc_size;
> + res->dirty = (struct vmw_resource_dirty *) dirty;
> +
> + return 0;
> +
> +out_no_dirty:
> + ttm_mem_global_free(vmw_mem_glob(res->dev_priv), acc_size);
> + return ret;
> +}
> +
> +/*
> + * vmw_surface_dirty_free - The surface's dirty_free callback
> + */
> +static void vmw_surface_dirty_free(struct vmw_resource *res)
> +{
> + struct vmw_surface_dirty *dirty =
> + (struct vmw_surface_dirty *) res->dirty;
> + size_t acc_size = dirty->size;
> +
> + kvfree(dirty);
> + ttm_mem_global_free(vmw_mem_glob(res->dev_priv), acc_size);
> + res->dirty = NULL;
> +}
> +
> +/*
> + * vmw_surface_clean - The surface's clean callback
> + */
> +static int vmw_surface_clean(struct vmw_resource *res)
> +{
> + struct vmw_private *dev_priv = res->dev_priv;
> + size_t alloc_size;
> + struct {
> + SVGA3dCmdHeader header;
> + SVGA3dCmdReadbackGBSurface body;
> + } *cmd;
> +
> + alloc_size = sizeof(*cmd);
> + cmd = VMW_FIFO_RESERVE(dev_priv, alloc_size);
> + if (!cmd)
> + return -ENOMEM;
> +
> + cmd->header.id = SVGA_3D_CMD_READBACK_GB_SURFACE;
> + cmd->header.size = sizeof(cmd->body);
> + cmd->body.sid = res->id;
> + vmw_fifo_commit(dev_priv, alloc_size);
> +
> + return 0;
> +}
> diff --git a/include/uapi/drm/vmwgfx_drm.h
> b/include/uapi/drm/vmwgfx_drm.h
> index 399f58317cff..02cab33f2f25 100644
> --- a/include/uapi/drm/vmwgfx_drm.h
> +++ b/include/uapi/drm/vmwgfx_drm.h
> @@ -891,11 +891,13 @@ struct drm_vmw_shader_arg {
> * surface.
> * @drm_vmw_surface_flag_create_buffer: Create a backup buffer if
> none is
> * given.
> + * @drm_vmw_surface_flag_coherent: Back surface with coherent
> memory.
> */
> enum drm_vmw_surface_flags {
> drm_vmw_surface_flag_shareable = (1 << 0),
> drm_vmw_surface_flag_scanout = (1 << 1),
> - drm_vmw_surface_flag_create_buffer = (1 << 2)
> + drm_vmw_surface_flag_create_buffer = (1 << 2),
> + drm_vmw_surface_flag_coherent = (1 << 3),
> };
>
> /**
> --
> 2.20.1
>
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