Introduces a new parameters to execbuf so that we can specify syncobj
handles as well as timeline points.
This is needed for the submission side of the Vulkan timeline
semaphore (VK_KHR_timeline_semaphore extension).
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.c | 4 +-
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 190 ++++++++++++++++-----
include/uapi/drm/i915_drm.h | 38 ++++-
3 files changed, 182 insertions(+), 50 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 83d2eb9e74cb..d62ddf2fa5b5 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -444,6 +444,7 @@ static int i915_getparam_ioctl(struct drm_device *dev, void *data,
case I915_PARAM_HAS_EXEC_BATCH_FIRST:
case I915_PARAM_HAS_EXEC_FENCE_ARRAY:
case I915_PARAM_HAS_EXEC_SUBMIT_FENCE:
+ case I915_PARAM_HAS_EXEC_FENCE_ARRAY2:
/* For the time being all of these are always true;
* if some supported hardware does not have one of these
* features this value needs to be provided from
@@ -3175,7 +3176,8 @@ static struct drm_driver driver = {
*/
.driver_features =
DRIVER_GEM | DRIVER_PRIME |
- DRIVER_RENDER | DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_SYNCOBJ,
+ DRIVER_RENDER | DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_SYNCOBJ |
+ DRIVER_SYNCOBJ_TIMELINE,
.release = i915_driver_release,
.open = i915_driver_open,
.lastclose = i915_driver_lastclose,
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 8b85c91c3ea4..f681533c085a 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -229,6 +229,13 @@ enum {
* the batchbuffer in trusted mode, otherwise the ioctl is rejected.
*/
+struct i915_drm_dma_fences {
+ struct drm_syncobj *syncobj; /* Use with ptr_mask_bits() */
+ struct dma_fence *dma_fence;
+ u64 value;
+ struct dma_fence_chain *chain_fence;
+};
+
struct i915_execbuffer {
struct drm_i915_private *i915; /** i915 backpointer */
struct drm_file *file; /** per-file lookup tables and limits */
@@ -1932,7 +1939,7 @@ static bool i915_gem_check_execbuffer(struct drm_i915_gem_execbuffer2 *exec)
return false;
/* Kernel clipping was a DRI1 misfeature */
- if (!(exec->flags & I915_EXEC_FENCE_ARRAY)) {
+ if (!(exec->flags & (I915_EXEC_FENCE_ARRAY | I915_EXEC_FENCE_ARRAY2))) {
if (exec->num_cliprects || exec->cliprects_ptr)
return false;
}
@@ -2182,25 +2189,30 @@ eb_select_engine(struct i915_execbuffer *eb,
}
static void
-__free_fence_array(struct drm_syncobj **fences, unsigned int n)
+__free_fence_array(struct i915_drm_dma_fences *fences, unsigned int n)
{
- while (n--)
- drm_syncobj_put(ptr_mask_bits(fences[n], 2));
+ while (n--) {
+ drm_syncobj_put(ptr_mask_bits(fences[n].syncobj, 2));
+ dma_fence_put(fences[n].dma_fence);
+ kfree(fences[n].chain_fence);
+ }
kvfree(fences);
}
-static struct drm_syncobj **
+static struct i915_drm_dma_fences *
get_fence_array(struct drm_i915_gem_execbuffer2 *args,
struct drm_file *file)
{
const unsigned long nfences = args->num_cliprects;
struct drm_i915_gem_exec_fence __user *user;
- struct drm_syncobj **fences;
+ struct drm_i915_gem_exec_fence2 __user *user2;
+ struct i915_drm_dma_fences *fences;
unsigned long n;
int err;
- if (!(args->flags & I915_EXEC_FENCE_ARRAY))
- return NULL;
+ if ((args->flags & (I915_EXEC_FENCE_ARRAY | I915_EXEC_FENCE_ARRAY2)) ==
+ (I915_EXEC_FENCE_ARRAY | I915_EXEC_FENCE_ARRAY2))
+ return ERR_PTR(-EINVAL);
/* Check multiplication overflow for access_ok() and kvmalloc_array() */
BUILD_BUG_ON(sizeof(size_t) > sizeof(unsigned long));
@@ -2209,40 +2221,121 @@ get_fence_array(struct drm_i915_gem_execbuffer2 *args,
SIZE_MAX / sizeof(*fences)))
return ERR_PTR(-EINVAL);
- user = u64_to_user_ptr(args->cliprects_ptr);
- if (!access_ok(user, nfences * sizeof(*user)))
- return ERR_PTR(-EFAULT);
+ if (args->flags & I915_EXEC_FENCE_ARRAY2) {
+ user2 = u64_to_user_ptr(args->cliprects_ptr);
+ if (!access_ok(user, nfences * sizeof(*user2)))
+ return ERR_PTR(-EFAULT);
+ } else {
+ user = u64_to_user_ptr(args->cliprects_ptr);
+ if (!access_ok(user, nfences * sizeof(*user)))
+ return ERR_PTR(-EFAULT);
+ }
fences = kvmalloc_array(nfences, sizeof(*fences),
__GFP_NOWARN | GFP_KERNEL);
if (!fences)
return ERR_PTR(-ENOMEM);
- for (n = 0; n < nfences; n++) {
- struct drm_i915_gem_exec_fence fence;
- struct drm_syncobj *syncobj;
+ BUILD_BUG_ON(~(ARCH_KMALLOC_MINALIGN - 1) &
+ ~__I915_EXEC_FENCE_UNKNOWN_FLAGS);
- if (__copy_from_user(&fence, user++, sizeof(fence))) {
- err = -EFAULT;
- goto err;
- }
+ if (args->flags & I915_EXEC_FENCE_ARRAY2) {
+ for (n = 0; n < nfences; n++) {
+ struct drm_i915_gem_exec_fence2 user_fence;
+ struct drm_syncobj *syncobj;
+ struct dma_fence *fence = NULL;
- if (fence.flags & __I915_EXEC_FENCE_UNKNOWN_FLAGS) {
- err = -EINVAL;
- goto err;
- }
+ if (__copy_from_user(&user_fence, user2++, sizeof(user_fence))) {
+ err = -EFAULT;
+ goto err;
+ }
- syncobj = drm_syncobj_find(file, fence.handle);
- if (!syncobj) {
- DRM_DEBUG("Invalid syncobj handle provided\n");
- err = -ENOENT;
- goto err;
+ if (user_fence.flags & __I915_EXEC_FENCE_UNKNOWN_FLAGS) {
+ err = -EINVAL;
+ goto err;
+ }
+
+ if (user_fence.flags & I915_EXEC_FENCE_WAIT) {
+ err = drm_syncobj_find_fence(
+ file, user_fence.handle, user_fence.value,
+ DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT,
+ &syncobj, &fence);
+ if (err) {
+ DRM_DEBUG("Invalid syncobj handle or timeline value provided\n");
+ goto err;
+ }
+ } else {
+ syncobj = drm_syncobj_find(
+ file, user_fence.handle);
+ if (!syncobj) {
+ err = -ENOENT;
+ DRM_DEBUG("Invalid syncobj handle provided\n");
+ goto err;
+ }
+ }
+
+ if (user_fence.value != 0 && user_fence.flags & I915_EXEC_FENCE_SIGNAL) {
+ fences[n].chain_fence =
+ kmalloc(sizeof(*fences[n].chain_fence),
+ GFP_KERNEL);
+ if (!fences[n].chain_fence) {
+ dma_fence_put(fence);
+ drm_syncobj_put(syncobj);
+ err = -ENOMEM;
+ DRM_DEBUG("Unable to alloc chain_fence\n");
+ goto err;
+ }
+ } else {
+ fences[n].chain_fence = NULL;
+ }
+
+ fences[n].syncobj = ptr_pack_bits(syncobj, user_fence.flags, 2);
+ fences[n].dma_fence = fence;
+ fences[n].value = user_fence.value;
}
+ } else {
+ for (n = 0; n < nfences; n++) {
+ struct drm_i915_gem_exec_fence user_fence;
+ struct drm_syncobj *syncobj;
+ struct dma_fence *fence;
+
+ if (__copy_from_user(&user_fence, user++, sizeof(user_fence))) {
+ err = -EFAULT;
+ goto err;
+ }
+
+ if (user_fence.flags & __I915_EXEC_FENCE_UNKNOWN_FLAGS) {
+ err = -EINVAL;
+ goto err;
+ }
- BUILD_BUG_ON(~(ARCH_KMALLOC_MINALIGN - 1) &
- ~__I915_EXEC_FENCE_UNKNOWN_FLAGS);
+ /* If we're just signaling a syncobj, no need to get
+ * the fence.
+ */
+ if (user_fence.flags & I915_EXEC_FENCE_WAIT) {
+ err = drm_syncobj_find_fence(
+ file, user_fence.handle, 0, 0, &syncobj, &fence);
+ if (err) {
+ DRM_DEBUG("Invalid syncobj handle provided\n");
+ goto err;
+ }
+ } else {
+ syncobj = drm_syncobj_find(file, user_fence.handle);
+ if (!syncobj) {
+ DRM_DEBUG("Invalid syncobj handle provided\n");
+ goto err;
+ }
+ fence = NULL;
+ }
+
+ BUILD_BUG_ON(~(ARCH_KMALLOC_MINALIGN - 1) &
+ ~__I915_EXEC_FENCE_UNKNOWN_FLAGS);
- fences[n] = ptr_pack_bits(syncobj, fence.flags, 2);
+ fences[n].syncobj = ptr_pack_bits(syncobj, user_fence.flags, 2);
+ fences[n].dma_fence = fence;
+ fences[n].value = 0;
+ fences[n].chain_fence = NULL;
+ }
}
return fences;
@@ -2254,7 +2347,7 @@ get_fence_array(struct drm_i915_gem_execbuffer2 *args,
static void
put_fence_array(struct drm_i915_gem_execbuffer2 *args,
- struct drm_syncobj **fences)
+ struct i915_drm_dma_fences *fences)
{
if (fences)
__free_fence_array(fences, args->num_cliprects);
@@ -2262,7 +2355,7 @@ put_fence_array(struct drm_i915_gem_execbuffer2 *args,
static int
await_fence_array(struct i915_execbuffer *eb,
- struct drm_syncobj **fences)
+ struct i915_drm_dma_fences *fences)
{
const unsigned int nfences = eb->args->num_cliprects;
unsigned int n;
@@ -2270,19 +2363,14 @@ await_fence_array(struct i915_execbuffer *eb,
for (n = 0; n < nfences; n++) {
struct drm_syncobj *syncobj;
- struct dma_fence *fence;
unsigned int flags;
- syncobj = ptr_unpack_bits(fences[n], &flags, 2);
+ syncobj = ptr_unpack_bits(fences[n].syncobj, &flags, 2);
if (!(flags & I915_EXEC_FENCE_WAIT))
continue;
- fence = drm_syncobj_fence_get(syncobj);
- if (!fence)
- return -EINVAL;
-
- err = i915_request_await_dma_fence(eb->request, fence);
- dma_fence_put(fence);
+ err = i915_request_await_dma_fence(eb->request,
+ fences[n].dma_fence);
if (err < 0)
return err;
}
@@ -2292,7 +2380,7 @@ await_fence_array(struct i915_execbuffer *eb,
static void
signal_fence_array(struct i915_execbuffer *eb,
- struct drm_syncobj **fences)
+ struct i915_drm_dma_fences *fences)
{
const unsigned int nfences = eb->args->num_cliprects;
struct dma_fence * const fence = &eb->request->fence;
@@ -2302,11 +2390,21 @@ signal_fence_array(struct i915_execbuffer *eb,
struct drm_syncobj *syncobj;
unsigned int flags;
- syncobj = ptr_unpack_bits(fences[n], &flags, 2);
+ syncobj = ptr_unpack_bits(fences[n].syncobj, &flags, 2);
if (!(flags & I915_EXEC_FENCE_SIGNAL))
continue;
- drm_syncobj_replace_fence(syncobj, fence);
+ if (fences[n].chain_fence) {
+ drm_syncobj_add_point(syncobj, fences[n].chain_fence,
+ fence, fences[n].value);
+ /*
+ * The chain's ownership is transfered to the
+ * timeline.
+ */
+ fences[n].chain_fence = NULL;
+ } else {
+ drm_syncobj_replace_fence(syncobj, fence);
+ }
}
}
@@ -2315,7 +2413,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
struct drm_file *file,
struct drm_i915_gem_execbuffer2 *args,
struct drm_i915_gem_exec_object2 *exec,
- struct drm_syncobj **fences)
+ struct i915_drm_dma_fences *fences)
{
struct i915_execbuffer eb;
struct dma_fence *in_fence = NULL;
@@ -2705,7 +2803,7 @@ i915_gem_execbuffer2_ioctl(struct drm_device *dev, void *data,
{
struct drm_i915_gem_execbuffer2 *args = data;
struct drm_i915_gem_exec_object2 *exec2_list;
- struct drm_syncobj **fences = NULL;
+ struct i915_drm_dma_fences *fences = NULL;
const size_t count = args->buffer_count;
int err;
@@ -2733,7 +2831,7 @@ i915_gem_execbuffer2_ioctl(struct drm_device *dev, void *data,
return -EFAULT;
}
- if (args->flags & I915_EXEC_FENCE_ARRAY) {
+ if (args->flags & (I915_EXEC_FENCE_ARRAY | I915_EXEC_FENCE_ARRAY2)) {
fences = get_fence_array(args, file);
if (IS_ERR(fences)) {
kvfree(exec2_list);
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 328d05e77d9f..eaf7b89360fd 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -610,6 +610,12 @@ typedef struct drm_i915_irq_wait {
* See I915_EXEC_FENCE_OUT and I915_EXEC_FENCE_SUBMIT.
*/
#define I915_PARAM_HAS_EXEC_SUBMIT_FENCE 53
+
+/* Query whether DRM_I915_GEM_EXECBUFFER2 supports supplying an array of
+ * drm_i915_gem_exec_fence2 structures. See I915_EXEC_FENCE_ARRAY.
+ */
+#define I915_PARAM_HAS_EXEC_FENCE_ARRAY2 54
+
/* Must be kept compact -- no holes and well documented */
typedef struct drm_i915_getparam {
@@ -1006,6 +1012,24 @@ struct drm_i915_gem_exec_fence {
__u32 flags;
};
+struct drm_i915_gem_exec_fence2 {
+ /**
+ * User's handle for a drm_syncobj to wait on or signal.
+ */
+ __u32 handle;
+
+ /**
+ * Same flags as drm_i915_gem_exec_fence.
+ */
+ __u32 flags;
+
+ /**
+ * A point for a timeline drm_syncobj to wait on or signal. Must be 0
+ * for a binary drm_syncobj.
+ */
+ __u64 value;
+};
+
struct drm_i915_gem_execbuffer2 {
/**
* List of gem_exec_object2 structs
@@ -1022,8 +1046,10 @@ struct drm_i915_gem_execbuffer2 {
__u32 num_cliprects;
/**
* This is a struct drm_clip_rect *cliprects if I915_EXEC_FENCE_ARRAY
- * is not set. If I915_EXEC_FENCE_ARRAY is set, then this is a
- * struct drm_i915_gem_exec_fence *fences.
+ * & I915_EXEC_FENCE_ARRAY2 are not set. If I915_EXEC_FENCE_ARRAY is
+ * set, then this is a struct drm_i915_gem_exec_fence *fences. If
+ * I915_EXEC_FENCE_ARRAY2 is set, then this is a struct
+ * drm_i915_gem_exec_fence2 *fences.
*/
__u64 cliprects_ptr;
#define I915_EXEC_RING_MASK (0x3f)
@@ -1141,7 +1167,13 @@ struct drm_i915_gem_execbuffer2 {
*/
#define I915_EXEC_FENCE_SUBMIT (1 << 20)
-#define __I915_EXEC_UNKNOWN_FLAGS (-(I915_EXEC_FENCE_SUBMIT << 1))
+/* Setting I915_FENCE_ARRAY2 implies that num_cliprects and cliprects_ptr
+ * define an array of i915_gem_exec_fence2 structures which specify a set of
+ * dma fences to wait upon or signal.
+ */
+#define I915_EXEC_FENCE_ARRAY2 (1<<22)
+
+#define __I915_EXEC_UNKNOWN_FLAGS (-(I915_EXEC_FENCE_ARRAY2<<1))
#define I915_EXEC_CONTEXT_ID_MASK (0xffffffff)
#define i915_execbuffer2_set_context_id(eb2, context) \
--
2.21.0.392.gf8f6787159e
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