[PATCH 2/6] drm/tegra: Implement correct DMA-BUF semantics
Thierry Reding
thierry.reding at gmail.com
Thu Sep 16 09:44:00 UTC 2021
From: Thierry Reding <treding at nvidia.com>
DMA-BUF requires that each device that accesses a DMA-BUF attaches to it
separately. To do so the host1x_bo_pin() and host1x_bo_unpin() functions
need to be reimplemented so that they can return a mapping, which either
represents an attachment or a map of the driver's own GEM object.
Signed-off-by: Thierry Reding <treding at nvidia.com>
---
drivers/gpu/drm/tegra/gem.c | 138 +++++++++++++++-------------
drivers/gpu/drm/tegra/plane.c | 60 ++++---------
drivers/gpu/drm/tegra/plane.h | 2 +-
drivers/gpu/drm/tegra/submit.c | 63 +++++++++----
drivers/gpu/drm/tegra/uapi.c | 68 ++++++--------
drivers/gpu/drm/tegra/uapi.h | 5 +-
drivers/gpu/host1x/job.c | 158 ++++++++++++---------------------
drivers/gpu/host1x/job.h | 6 +-
include/linux/host1x.h | 30 ++++---
9 files changed, 244 insertions(+), 286 deletions(-)
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index 6ec598f5d5b3..79a609f981d1 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -27,79 +27,64 @@ static void tegra_bo_put(struct host1x_bo *bo)
drm_gem_object_put(&obj->gem);
}
-/* XXX move this into lib/scatterlist.c? */
-static int sg_alloc_table_from_sg(struct sg_table *sgt, struct scatterlist *sg,
- unsigned int nents, gfp_t gfp_mask)
+static struct host1x_bo_mapping *tegra_bo_pin(struct device *dev, struct host1x_bo *bo,
+ enum dma_data_direction direction)
{
- struct scatterlist *dst;
- unsigned int i;
+ struct tegra_bo *obj = host1x_to_tegra_bo(bo);
+ struct drm_gem_object *gem = &obj->gem;
+ struct host1x_bo_mapping *map;
int err;
- err = sg_alloc_table(sgt, nents, gfp_mask);
- if (err < 0)
- return err;
+ map = kzalloc(sizeof(*map), GFP_KERNEL);
+ if (!map)
+ return ERR_PTR(-ENOMEM);
- dst = sgt->sgl;
+ map->bo = host1x_bo_get(bo);
+ map->direction = direction;
+ map->dev = dev;
- for (i = 0; i < nents; i++) {
- sg_set_page(dst, sg_page(sg), sg->length, 0);
- dst = sg_next(dst);
- sg = sg_next(sg);
- }
+ /*
+ * Imported buffers need special treatment to satisfy the semantics of DMA-BUF.
+ */
+ if (gem->import_attach) {
+ struct dma_buf *buf = gem->import_attach->dmabuf;
- return 0;
-}
+ map->attach = dma_buf_attach(buf, dev);
+ if (IS_ERR(map->attach)) {
+ err = PTR_ERR(map->attach);
+ goto free;
+ }
-static struct sg_table *tegra_bo_pin(struct device *dev, struct host1x_bo *bo,
- dma_addr_t *phys)
-{
- struct tegra_bo *obj = host1x_to_tegra_bo(bo);
- struct sg_table *sgt;
- int err;
+ map->sgt = dma_buf_map_attachment(map->attach, direction);
+ if (IS_ERR(map->sgt)) {
+ dma_buf_detach(buf, map->attach);
+ err = PTR_ERR(map->sgt);
+ goto free;
+ }
- /*
- * If we've manually mapped the buffer object through the IOMMU, make
- * sure to return the IOVA address of our mapping.
- *
- * Similarly, for buffers that have been allocated by the DMA API the
- * physical address can be used for devices that are not attached to
- * an IOMMU. For these devices, callers must pass a valid pointer via
- * the @phys argument.
- *
- * Imported buffers were also already mapped at import time, so the
- * existing mapping can be reused.
- */
- if (phys) {
- *phys = obj->iova;
- return NULL;
+ err = sgt_dma_count_chunks(map->sgt);
+ map->size = gem->size;
+
+ goto out;
}
/*
* If we don't have a mapping for this buffer yet, return an SG table
* so that host1x can do the mapping for us via the DMA API.
*/
- sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
- if (!sgt)
- return ERR_PTR(-ENOMEM);
+ map->sgt = kzalloc(sizeof(*map->sgt), GFP_KERNEL);
+ if (!map->sgt) {
+ err = -ENOMEM;
+ goto free;
+ }
if (obj->pages) {
/*
* If the buffer object was allocated from the explicit IOMMU
* API code paths, construct an SG table from the pages.
*/
- err = sg_alloc_table_from_pages(sgt, obj->pages, obj->num_pages,
- 0, obj->gem.size, GFP_KERNEL);
- if (err < 0)
- goto free;
- } else if (obj->sgt) {
- /*
- * If the buffer object already has an SG table but no pages
- * were allocated for it, it means the buffer was imported and
- * the SG table needs to be copied to avoid overwriting any
- * other potential users of the original SG table.
- */
- err = sg_alloc_table_from_sg(sgt, obj->sgt->sgl,
- obj->sgt->orig_nents, GFP_KERNEL);
+ err = sg_alloc_table_from_pages(map->sgt, obj->pages, obj->num_pages, 0, gem->size,
+ GFP_KERNEL);
if (err < 0)
goto free;
} else {
@@ -108,25 +93,56 @@ static struct sg_table *tegra_bo_pin(struct device *dev, struct host1x_bo *bo,
* not imported, it had to be allocated with the DMA API, so
* the DMA API helper can be used.
*/
- err = dma_get_sgtable(dev, sgt, obj->vaddr, obj->iova,
- obj->gem.size);
+ err = dma_get_sgtable(dev, map->sgt, obj->vaddr, obj->iova, gem->size);
if (err < 0)
goto free;
}
- return sgt;
+ err = dma_map_sgtable(dev, map->sgt, direction, 0);
+ if (err)
+ goto free_sgt;
+out:
+ /*
+ * If we've manually mapped the buffer object through the IOMMU, make sure to return the
+ * existing IOVA address of our mapping.
+ */
+ if (!obj->mm) {
+ map->phys = sg_dma_address(map->sgt->sgl);
+ map->chunks = err;
+ } else {
+ map->phys = obj->iova;
+ map->chunks = 1;
+ }
+
+ map->size = gem->size;
+
+ return map;
+
+free_sgt:
+ sg_free_table(map->sgt);
free:
- kfree(sgt);
+ kfree(map->sgt);
+ kfree(map);
return ERR_PTR(err);
}
-static void tegra_bo_unpin(struct device *dev, struct sg_table *sgt)
+static void tegra_bo_unpin(struct host1x_bo_mapping *map)
{
- if (sgt) {
- sg_free_table(sgt);
- kfree(sgt);
+ if (!map)
+ return;
+
+ if (map->attach) {
+ dma_buf_unmap_attachment(map->attach, map->sgt, map->direction);
+ dma_buf_detach(map->attach->dmabuf, map->attach);
+ } else {
+ dma_unmap_sgtable(map->dev, map->sgt, map->direction, 0);
+ sg_free_table(map->sgt);
+ kfree(map->sgt);
}
+
+ host1x_bo_put(map->bo);
+ kfree(map);
}
static void *tegra_bo_mmap(struct host1x_bo *bo)
diff --git a/drivers/gpu/drm/tegra/plane.c b/drivers/gpu/drm/tegra/plane.c
index 16a1cdc28657..e579d966e8dc 100644
--- a/drivers/gpu/drm/tegra/plane.c
+++ b/drivers/gpu/drm/tegra/plane.c
@@ -74,7 +74,7 @@ tegra_plane_atomic_duplicate_state(struct drm_plane *plane)
for (i = 0; i < 3; i++) {
copy->iova[i] = DMA_MAPPING_ERROR;
- copy->sgt[i] = NULL;
+ copy->map[i] = NULL;
}
return ©->base;
@@ -138,55 +138,37 @@ const struct drm_plane_funcs tegra_plane_funcs = {
static int tegra_dc_pin(struct tegra_dc *dc, struct tegra_plane_state *state)
{
- struct iommu_domain *domain = iommu_get_domain_for_dev(dc->dev);
unsigned int i;
int err;
for (i = 0; i < state->base.fb->format->num_planes; i++) {
struct tegra_bo *bo = tegra_fb_get_plane(state->base.fb, i);
- dma_addr_t phys_addr, *phys;
- struct sg_table *sgt;
+ struct host1x_bo_mapping *map;
- /*
- * If we're not attached to a domain, we already stored the
- * physical address when the buffer was allocated. If we're
- * part of a group that's shared between all display
- * controllers, we've also already mapped the framebuffer
- * through the SMMU. In both cases we can short-circuit the
- * code below and retrieve the stored IOV address.
- */
- if (!domain || dc->client.group)
- phys = &phys_addr;
- else
- phys = NULL;
-
- sgt = host1x_bo_pin(dc->dev, &bo->base, phys);
- if (IS_ERR(sgt)) {
- err = PTR_ERR(sgt);
+ map = host1x_bo_pin(dc->dev, &bo->base, DMA_TO_DEVICE);
+ if (IS_ERR(map)) {
+ err = PTR_ERR(map);
goto unpin;
}
- if (sgt) {
- err = dma_map_sgtable(dc->dev, sgt, DMA_TO_DEVICE, 0);
- if (err)
- goto unpin;
-
+ if (!dc->client.group) {
/*
* The display controller needs contiguous memory, so
* fail if the buffer is discontiguous and we fail to
* map its SG table to a single contiguous chunk of
* I/O virtual memory.
*/
- if (sgt->nents > 1) {
+ if (map->chunks > 1) {
err = -EINVAL;
goto unpin;
}
- state->iova[i] = sg_dma_address(sgt->sgl);
- state->sgt[i] = sgt;
+ state->iova[i] = map->phys;
} else {
- state->iova[i] = phys_addr;
+ state->iova[i] = bo->iova;
}
+
+ state->map[i] = map;
}
return 0;
@@ -195,15 +177,9 @@ static int tegra_dc_pin(struct tegra_dc *dc, struct tegra_plane_state *state)
dev_err(dc->dev, "failed to map plane %u: %d\n", i, err);
while (i--) {
- struct tegra_bo *bo = tegra_fb_get_plane(state->base.fb, i);
- struct sg_table *sgt = state->sgt[i];
-
- if (sgt)
- dma_unmap_sgtable(dc->dev, sgt, DMA_TO_DEVICE, 0);
-
- host1x_bo_unpin(dc->dev, &bo->base, sgt);
+ host1x_bo_unpin(state->map[i]);
state->iova[i] = DMA_MAPPING_ERROR;
- state->sgt[i] = NULL;
+ state->map[i] = NULL;
}
return err;
@@ -214,15 +190,9 @@ static void tegra_dc_unpin(struct tegra_dc *dc, struct tegra_plane_state *state)
unsigned int i;
for (i = 0; i < state->base.fb->format->num_planes; i++) {
- struct tegra_bo *bo = tegra_fb_get_plane(state->base.fb, i);
- struct sg_table *sgt = state->sgt[i];
-
- if (sgt)
- dma_unmap_sgtable(dc->dev, sgt, DMA_TO_DEVICE, 0);
-
- host1x_bo_unpin(dc->dev, &bo->base, sgt);
+ host1x_bo_unpin(state->map[i]);
state->iova[i] = DMA_MAPPING_ERROR;
- state->sgt[i] = NULL;
+ state->map[i] = NULL;
}
}
diff --git a/drivers/gpu/drm/tegra/plane.h b/drivers/gpu/drm/tegra/plane.h
index d9470780c803..dfb20712fbd7 100644
--- a/drivers/gpu/drm/tegra/plane.h
+++ b/drivers/gpu/drm/tegra/plane.h
@@ -43,7 +43,7 @@ struct tegra_plane_legacy_blending_state {
struct tegra_plane_state {
struct drm_plane_state base;
- struct sg_table *sgt[3];
+ struct host1x_bo_mapping *map[3];
dma_addr_t iova[3];
struct tegra_bo_tiling tiling;
diff --git a/drivers/gpu/drm/tegra/submit.c b/drivers/gpu/drm/tegra/submit.c
index 776f825df52f..c32698404e36 100644
--- a/drivers/gpu/drm/tegra/submit.c
+++ b/drivers/gpu/drm/tegra/submit.c
@@ -64,33 +64,62 @@ static void gather_bo_put(struct host1x_bo *host_bo)
kref_put(&bo->ref, gather_bo_release);
}
-static struct sg_table *
-gather_bo_pin(struct device *dev, struct host1x_bo *host_bo, dma_addr_t *phys)
+static struct host1x_bo_mapping *
+gather_bo_pin(struct device *dev, struct host1x_bo *bo, enum dma_data_direction direction)
{
- struct gather_bo *bo = container_of(host_bo, struct gather_bo, base);
- struct sg_table *sgt;
+ struct gather_bo *gather = container_of(bo, struct gather_bo, base);
+ struct host1x_bo_mapping *map;
int err;
- sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
- if (!sgt)
+ map = kzalloc(sizeof(*map), GFP_KERNEL);
+ if (!map)
return ERR_PTR(-ENOMEM);
- err = dma_get_sgtable(bo->dev, sgt, bo->gather_data, bo->gather_data_dma,
- bo->gather_data_words * 4);
- if (err) {
- kfree(sgt);
- return ERR_PTR(err);
+ kref_init(&map->ref);
+ map->bo = host1x_bo_get(bo);
+ map->direction = direction;
+ map->dev = dev;
+
+ map->sgt = kzalloc(sizeof(*map->sgt), GFP_KERNEL);
+ if (!map->sgt) {
+ err = -ENOMEM;
+ goto free;
}
- return sgt;
+ err = dma_get_sgtable(gather->dev, map->sgt, gather->gather_data, gather->gather_data_dma,
+ gather->gather_data_words * 4);
+ if (err)
+ goto free_sgt;
+
+ err = dma_map_sgtable(dev, map->sgt, direction, 0);
+ if (err)
+ goto free_sgt;
+
+ map->phys = sg_dma_address(map->sgt->sgl);
+ map->size = gather->gather_data_words * 4;
+ map->chunks = err;
+
+ return map;
+
+free_sgt:
+ sg_free_table(map->sgt);
+ kfree(map->sgt);
+free:
+ kfree(map);
+ return ERR_PTR(err);
}
-static void gather_bo_unpin(struct device *dev, struct sg_table *sgt)
+static void gather_bo_unpin(struct host1x_bo_mapping *map)
{
- if (sgt) {
- sg_free_table(sgt);
- kfree(sgt);
- }
+ if (!map)
+ return;
+
+ dma_unmap_sgtable(map->dev, map->sgt, map->direction, 0);
+ sg_free_table(map->sgt);
+ kfree(map->sgt);
+ host1x_bo_put(map->bo);
+
+ kfree(map);
}
static void *gather_bo_mmap(struct host1x_bo *host_bo)
diff --git a/drivers/gpu/drm/tegra/uapi.c b/drivers/gpu/drm/tegra/uapi.c
index dc16a24f4dbe..794c400c38b1 100644
--- a/drivers/gpu/drm/tegra/uapi.c
+++ b/drivers/gpu/drm/tegra/uapi.c
@@ -17,11 +17,7 @@ static void tegra_drm_mapping_release(struct kref *ref)
struct tegra_drm_mapping *mapping =
container_of(ref, struct tegra_drm_mapping, ref);
- if (mapping->sgt)
- dma_unmap_sgtable(mapping->dev, mapping->sgt, mapping->direction,
- DMA_ATTR_SKIP_CPU_SYNC);
-
- host1x_bo_unpin(mapping->dev, mapping->bo, mapping->sgt);
+ host1x_bo_unpin(mapping->map);
host1x_bo_put(mapping->bo);
kfree(mapping);
@@ -159,6 +155,7 @@ int tegra_drm_ioctl_channel_map(struct drm_device *drm, void *data, struct drm_f
struct drm_tegra_channel_map *args = data;
struct tegra_drm_mapping *mapping;
struct tegra_drm_context *context;
+ enum dma_data_direction direction;
int err = 0;
if (args->flags & ~DRM_TEGRA_CHANNEL_MAP_READ_WRITE)
@@ -180,68 +177,53 @@ int tegra_drm_ioctl_channel_map(struct drm_device *drm, void *data, struct drm_f
kref_init(&mapping->ref);
- mapping->dev = context->client->base.dev;
mapping->bo = tegra_gem_lookup(file, args->handle);
if (!mapping->bo) {
err = -EINVAL;
- goto unlock;
+ goto free;
}
- if (context->client->base.group) {
- /* IOMMU domain managed directly using IOMMU API */
- host1x_bo_pin(mapping->dev, mapping->bo, &mapping->iova);
- } else {
- switch (args->flags & DRM_TEGRA_CHANNEL_MAP_READ_WRITE) {
- case DRM_TEGRA_CHANNEL_MAP_READ_WRITE:
- mapping->direction = DMA_BIDIRECTIONAL;
- break;
-
- case DRM_TEGRA_CHANNEL_MAP_WRITE:
- mapping->direction = DMA_FROM_DEVICE;
- break;
-
- case DRM_TEGRA_CHANNEL_MAP_READ:
- mapping->direction = DMA_TO_DEVICE;
- break;
+ switch (args->flags & DRM_TEGRA_CHANNEL_MAP_READ_WRITE) {
+ case DRM_TEGRA_CHANNEL_MAP_READ_WRITE:
+ direction = DMA_BIDIRECTIONAL;
+ break;
- default:
- return -EINVAL;
- }
+ case DRM_TEGRA_CHANNEL_MAP_WRITE:
+ direction = DMA_FROM_DEVICE;
+ break;
- mapping->sgt = host1x_bo_pin(mapping->dev, mapping->bo, NULL);
- if (IS_ERR(mapping->sgt)) {
- err = PTR_ERR(mapping->sgt);
- goto put_gem;
- }
+ case DRM_TEGRA_CHANNEL_MAP_READ:
+ direction = DMA_TO_DEVICE;
+ break;
- err = dma_map_sgtable(mapping->dev, mapping->sgt, mapping->direction,
- DMA_ATTR_SKIP_CPU_SYNC);
- if (err)
- goto unpin;
+ default:
+ err = -EINVAL;
+ goto put_gem;
+ }
- mapping->iova = sg_dma_address(mapping->sgt->sgl);
+ mapping->map = host1x_bo_pin(context->client->base.dev, mapping->bo, direction);
+ if (IS_ERR(mapping->map)) {
+ err = PTR_ERR(mapping->map);
+ goto put_gem;
}
+ mapping->iova = mapping->map->phys;
mapping->iova_end = mapping->iova + host1x_to_tegra_bo(mapping->bo)->size;
err = xa_alloc(&context->mappings, &args->mapping, mapping, XA_LIMIT(1, U32_MAX),
GFP_KERNEL);
if (err < 0)
- goto unmap;
+ goto unpin;
mutex_unlock(&fpriv->lock);
return 0;
-unmap:
- if (mapping->sgt) {
- dma_unmap_sgtable(mapping->dev, mapping->sgt, mapping->direction,
- DMA_ATTR_SKIP_CPU_SYNC);
- }
unpin:
- host1x_bo_unpin(mapping->dev, mapping->bo, mapping->sgt);
+ host1x_bo_unpin(mapping->map);
put_gem:
host1x_bo_put(mapping->bo);
+free:
kfree(mapping);
unlock:
mutex_unlock(&fpriv->lock);
diff --git a/drivers/gpu/drm/tegra/uapi.h b/drivers/gpu/drm/tegra/uapi.h
index 12adad770ad3..92ff1e44ff15 100644
--- a/drivers/gpu/drm/tegra/uapi.h
+++ b/drivers/gpu/drm/tegra/uapi.h
@@ -27,10 +27,9 @@ struct tegra_drm_file {
struct tegra_drm_mapping {
struct kref ref;
- struct device *dev;
+ struct host1x_bo_mapping *map;
struct host1x_bo *bo;
- struct sg_table *sgt;
- enum dma_data_direction direction;
+
dma_addr_t iova;
dma_addr_t iova_end;
};
diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c
index 0eef6df7c89e..7a27895e0d28 100644
--- a/drivers/gpu/host1x/job.c
+++ b/drivers/gpu/host1x/job.c
@@ -134,11 +134,11 @@ EXPORT_SYMBOL(host1x_job_add_wait);
static unsigned int pin_job(struct host1x *host, struct host1x_job *job)
{
+ unsigned long mask = HOST1X_RELOC_READ | HOST1X_RELOC_WRITE;
struct host1x_client *client = job->client;
struct device *dev = client->dev;
struct host1x_job_gather *g;
struct iommu_domain *domain;
- struct sg_table *sgt;
unsigned int i;
int err;
@@ -147,7 +147,9 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job)
for (i = 0; i < job->num_relocs; i++) {
struct host1x_reloc *reloc = &job->relocs[i];
- dma_addr_t phys_addr, *phys;
+ enum dma_data_direction direction;
+ struct host1x_bo_mapping *map;
+ struct host1x_bo *bo;
reloc->target.bo = host1x_bo_get(reloc->target.bo);
if (!reloc->target.bo) {
@@ -155,64 +157,44 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job)
goto unpin;
}
- /*
- * If the client device is not attached to an IOMMU, the
- * physical address of the buffer object can be used.
- *
- * Similarly, when an IOMMU domain is shared between all
- * host1x clients, the IOVA is already available, so no
- * need to map the buffer object again.
- *
- * XXX Note that this isn't always safe to do because it
- * relies on an assumption that no cache maintenance is
- * needed on the buffer objects.
- */
- if (!domain || client->group)
- phys = &phys_addr;
- else
- phys = NULL;
-
- sgt = host1x_bo_pin(dev, reloc->target.bo, phys);
- if (IS_ERR(sgt)) {
- err = PTR_ERR(sgt);
- goto unpin;
- }
+ bo = reloc->target.bo;
- if (sgt) {
- unsigned long mask = HOST1X_RELOC_READ |
- HOST1X_RELOC_WRITE;
- enum dma_data_direction dir;
-
- switch (reloc->flags & mask) {
- case HOST1X_RELOC_READ:
- dir = DMA_TO_DEVICE;
- break;
+ switch (reloc->flags & mask) {
+ case HOST1X_RELOC_READ:
+ direction = DMA_TO_DEVICE;
+ break;
- case HOST1X_RELOC_WRITE:
- dir = DMA_FROM_DEVICE;
- break;
+ case HOST1X_RELOC_WRITE:
+ direction = DMA_FROM_DEVICE;
+ break;
- case HOST1X_RELOC_READ | HOST1X_RELOC_WRITE:
- dir = DMA_BIDIRECTIONAL;
- break;
+ case HOST1X_RELOC_READ | HOST1X_RELOC_WRITE:
+ direction = DMA_BIDIRECTIONAL;
+ break;
- default:
- err = -EINVAL;
- goto unpin;
- }
+ default:
+ err = -EINVAL;
+ goto unpin;
+ }
- err = dma_map_sgtable(dev, sgt, dir, 0);
- if (err)
- goto unpin;
+ map = host1x_bo_pin(dev, bo, direction);
+ if (IS_ERR(map)) {
+ err = PTR_ERR(map);
+ goto unpin;
+ }
- job->unpins[job->num_unpins].dev = dev;
- job->unpins[job->num_unpins].dir = dir;
- phys_addr = sg_dma_address(sgt->sgl);
+ /*
+ * host1x clients are generally not able to do scatter-gather themselves, so fail
+ * if the buffer is discontiguous and we fail to map its SG table to a single
+ * contiguous chunk of I/O virtual memory.
+ */
+ if (map->chunks > 1) {
+ err = -EINVAL;
+ goto unpin;
}
- job->addr_phys[job->num_unpins] = phys_addr;
- job->unpins[job->num_unpins].bo = reloc->target.bo;
- job->unpins[job->num_unpins].sgt = sgt;
+ job->addr_phys[job->num_unpins] = map->phys;
+ job->unpins[job->num_unpins].map = map;
job->num_unpins++;
}
@@ -224,12 +206,11 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job)
return 0;
for (i = 0; i < job->num_cmds; i++) {
+ struct host1x_bo_mapping *map;
size_t gather_size = 0;
struct scatterlist *sg;
- dma_addr_t phys_addr;
unsigned long shift;
struct iova *alloc;
- dma_addr_t *phys;
unsigned int j;
if (job->cmds[i].is_wait)
@@ -243,25 +224,16 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job)
goto unpin;
}
- /**
- * If the host1x is not attached to an IOMMU, there is no need
- * to map the buffer object for the host1x, since the physical
- * address can simply be used.
- */
- if (!iommu_get_domain_for_dev(host->dev))
- phys = &phys_addr;
- else
- phys = NULL;
-
- sgt = host1x_bo_pin(host->dev, g->bo, phys);
- if (IS_ERR(sgt)) {
- err = PTR_ERR(sgt);
- goto put;
+ map = host1x_bo_pin(host->dev, g->bo, DMA_TO_DEVICE);
+ if (IS_ERR(map)) {
+ err = PTR_ERR(map);
+ goto unpin;
}
if (host->domain) {
- for_each_sgtable_sg(sgt, sg, j)
+ for_each_sgtable_sg(map->sgt, sg, j)
gather_size += sg->length;
+
gather_size = iova_align(&host->iova, gather_size);
shift = iova_shift(&host->iova);
@@ -272,33 +244,23 @@ static unsigned int pin_job(struct host1x *host, struct host1x_job *job)
goto put;
}
- err = iommu_map_sgtable(host->domain,
- iova_dma_addr(&host->iova, alloc),
- sgt, IOMMU_READ);
+ err = iommu_map_sgtable(host->domain, iova_dma_addr(&host->iova, alloc),
+ map->sgt, IOMMU_READ);
if (err == 0) {
__free_iova(&host->iova, alloc);
err = -EINVAL;
goto put;
}
- job->unpins[job->num_unpins].size = gather_size;
- phys_addr = iova_dma_addr(&host->iova, alloc);
- } else if (sgt) {
- err = dma_map_sgtable(host->dev, sgt, DMA_TO_DEVICE, 0);
- if (err)
- goto put;
-
- job->unpins[job->num_unpins].dir = DMA_TO_DEVICE;
- job->unpins[job->num_unpins].dev = host->dev;
- phys_addr = sg_dma_address(sgt->sgl);
+ map->phys = iova_dma_addr(&host->iova, alloc);
+ map->size = gather_size;
}
- job->addr_phys[job->num_unpins] = phys_addr;
- job->gather_addr_phys[i] = phys_addr;
-
- job->unpins[job->num_unpins].bo = g->bo;
- job->unpins[job->num_unpins].sgt = sgt;
+ job->addr_phys[job->num_unpins] = map->phys;
+ job->unpins[job->num_unpins].map = map;
job->num_unpins++;
+
+ job->gather_addr_phys[i] = map->phys;
}
return 0;
@@ -690,22 +652,16 @@ void host1x_job_unpin(struct host1x_job *job)
unsigned int i;
for (i = 0; i < job->num_unpins; i++) {
- struct host1x_job_unpin_data *unpin = &job->unpins[i];
- struct device *dev = unpin->dev ?: host->dev;
- struct sg_table *sgt = unpin->sgt;
-
- if (!job->enable_firewall && unpin->size && host->domain) {
- iommu_unmap(host->domain, job->addr_phys[i],
- unpin->size);
- free_iova(&host->iova,
- iova_pfn(&host->iova, job->addr_phys[i]));
- }
+ struct host1x_bo_mapping *map = job->unpins[i].map;
+ struct host1x_bo *bo = map->bo;
- if (unpin->dev && sgt)
- dma_unmap_sgtable(unpin->dev, sgt, unpin->dir, 0);
+ if (!job->enable_firewall && map->size && host->domain) {
+ iommu_unmap(host->domain, job->addr_phys[i], map->size);
+ free_iova(&host->iova, iova_pfn(&host->iova, job->addr_phys[i]));
+ }
- host1x_bo_unpin(dev, unpin->bo, sgt);
- host1x_bo_put(unpin->bo);
+ host1x_bo_unpin(map);
+ host1x_bo_put(bo);
}
job->num_unpins = 0;
diff --git a/drivers/gpu/host1x/job.h b/drivers/gpu/host1x/job.h
index b4428c5495c9..dad5a1946693 100644
--- a/drivers/gpu/host1x/job.h
+++ b/drivers/gpu/host1x/job.h
@@ -35,11 +35,7 @@ struct host1x_job_cmd {
};
struct host1x_job_unpin_data {
- struct host1x_bo *bo;
- struct sg_table *sgt;
- struct device *dev;
- size_t size;
- enum dma_data_direction dir;
+ struct host1x_bo_mapping *map;
};
/*
diff --git a/include/linux/host1x.h b/include/linux/host1x.h
index 2a1b53ebee77..56851523378a 100644
--- a/include/linux/host1x.h
+++ b/include/linux/host1x.h
@@ -7,6 +7,7 @@
#define __LINUX_HOST1X_H
#include <linux/device.h>
+#include <linux/dma-direction.h>
#include <linux/types.h>
enum host1x_class {
@@ -84,12 +85,23 @@ struct host1x_client {
struct host1x_bo;
struct sg_table;
+struct host1x_bo_mapping {
+ struct dma_buf_attachment *attach;
+ enum dma_data_direction direction;
+ struct host1x_bo *bo;
+ struct sg_table *sgt;
+ unsigned int chunks;
+ struct device *dev;
+ dma_addr_t phys;
+ size_t size;
+};
+
struct host1x_bo_ops {
struct host1x_bo *(*get)(struct host1x_bo *bo);
void (*put)(struct host1x_bo *bo);
- struct sg_table *(*pin)(struct device *dev, struct host1x_bo *bo,
- dma_addr_t *phys);
- void (*unpin)(struct device *dev, struct sg_table *sgt);
+ struct host1x_bo_mapping *(*pin)(struct device *dev, struct host1x_bo *bo,
+ enum dma_data_direction dir);
+ void (*unpin)(struct host1x_bo_mapping *map);
void *(*mmap)(struct host1x_bo *bo);
void (*munmap)(struct host1x_bo *bo, void *addr);
};
@@ -114,17 +126,15 @@ static inline void host1x_bo_put(struct host1x_bo *bo)
bo->ops->put(bo);
}
-static inline struct sg_table *host1x_bo_pin(struct device *dev,
- struct host1x_bo *bo,
- dma_addr_t *phys)
+static inline struct host1x_bo_mapping *host1x_bo_pin(struct device *dev, struct host1x_bo *bo,
+ enum dma_data_direction dir)
{
- return bo->ops->pin(dev, bo, phys);
+ return bo->ops->pin(dev, bo, dir);
}
-static inline void host1x_bo_unpin(struct device *dev, struct host1x_bo *bo,
- struct sg_table *sgt)
+static inline void host1x_bo_unpin(struct host1x_bo_mapping *map)
{
- bo->ops->unpin(dev, sgt);
+ map->bo->ops->unpin(map);
}
static inline void *host1x_bo_mmap(struct host1x_bo *bo)
--
2.33.0
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