| Message ID | 1479088796-3809-4-git-send-email-gustavo@padovan.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi, On Mon, Nov 14, 2016 at 10:59:56AM +0900, Gustavo Padovan wrote: >From: Gustavo Padovan <gustavo.padovan@collabora.co.uk> > >Support DRM out-fences by creating a sync_file with a fence for each CRTC >that sets the OUT_FENCE_PTR property. > >We use the out_fence pointer received in the OUT_FENCE_PTR prop to send >the sync_file fd back to userspace. > >The sync_file and fd are allocated/created before commit, but the >fd_install operation only happens after we know that commit succeed. > >v2: Comment by Rob Clark: > - Squash commit that adds DRM_MODE_ATOMIC_OUT_FENCE flag here. > > Comment by Daniel Vetter: > - Add clean up code for out_fences > >v3: Comments by Daniel Vetter: > - create DRM_MODE_ATOMIC_EVENT_MASK > - userspace should fill out_fences_ptr with the crtc_ids for which > it wants fences back. > >v4: Create OUT_FENCE_PTR properties and remove old approach. > >v5: Comments by Brian Starkey: > - Remove extra fence_get() in atomic_ioctl() > - Check ret before iterating on the crtc_state > - check ret before fd_install > - set fence_state to NULL at the beginning > - check fence_state->out_fence_ptr before put_user() > - change order of fput() and put_unused_fd() on failure > > - Add access_ok() check to the out_fence_ptr received > - Rebase after fence -> dma_fence rename > - Store out_fence_ptr in the drm_atomic_state > - Split crtc_setup_out_fence() > - return -1 as out_fence with TEST_ONLY flag > >v6: Comments by Daniel Vetter > - Add prepare/unprepare_crtc_signaling() > - move struct drm_out_fence_state to drm_atomic.c > - mark get_crtc_fence() as static > > Comments by Brian Starkey > - proper set fence_ptr fence_state array > - isolate fence_idx increment > > - improve error handling > >v7: Comments by Daniel Vetter > - remove prefix from internal functions > - make out_fence_ptr an s64 pointer > - degrade DRM_INFO to DRM_DEBUG_ATOMIC when put_user fail > - fix doc issues > - filter out OUT_FENCE_PTR == NULL and do not fail in this case > - add complete_crtc_signalling() > - krealloc fence_state on demand > > Comment by Brian Starkey > - remove unused crtc_state arg from get_out_fence() > >v8: Comment by Brian Starkey > - cancel events before check for !fence_state > - convert a few lefovers u64 types for out_fence_ptr > - fix memleak by assign fence_state earlier after realloc > - proper accout num_fences in case of error > >v9: Comment by Brian Starkey > - memset last position of fence_state after krealloc > Comments by Sean Paul > - pass install_fds in complete_crtc_signaling() instead of ret > > - put_user(-1, fence_ptr) when decoding props > >Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> >--- > drivers/gpu/drm/drm_atomic.c | 241 +++++++++++++++++++++++++++++++++++-------- > drivers/gpu/drm/drm_crtc.c | 8 ++ > include/drm/drm_atomic.h | 1 + > include/drm/drm_crtc.h | 6 ++ > 4 files changed, 211 insertions(+), 45 deletions(-) > >diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c >index 3ad780a..27e5c0a 100644 >--- a/drivers/gpu/drm/drm_atomic.c >+++ b/drivers/gpu/drm/drm_atomic.c >@@ -290,6 +290,23 @@ drm_atomic_get_crtc_state(struct drm_atomic_state *state, > } > EXPORT_SYMBOL(drm_atomic_get_crtc_state); > >+static void set_out_fence_for_crtc(struct drm_atomic_state *state, >+ struct drm_crtc *crtc, s64 __user *fence_ptr) >+{ >+ state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr; >+} >+ >+static s64 __user * get_out_fence_for_crtc(struct drm_atomic_state *state, >+ struct drm_crtc *crtc) >+{ >+ s64 __user *fence_ptr; >+ >+ fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr; >+ state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL; >+ >+ return fence_ptr; >+} >+ > /** > * drm_atomic_set_mode_for_crtc - set mode for CRTC > * @state: the CRTC whose incoming state to update >@@ -494,6 +511,16 @@ int drm_atomic_crtc_set_property(struct drm_crtc *crtc, > &replaced); > state->color_mgmt_changed |= replaced; > return ret; >+ } else if (property == config->prop_out_fence_ptr) { >+ s64 __user *fence_ptr = u64_to_user_ptr(val); >+ >+ if (!fence_ptr) >+ return 0; >+ >+ if (put_user(-1, fence_ptr)) >+ return -EFAULT; >+ >+ set_out_fence_for_crtc(state->state, crtc, fence_ptr); > } else if (crtc->funcs->atomic_set_property) > return crtc->funcs->atomic_set_property(crtc, state, property, val); > else >@@ -536,6 +563,8 @@ drm_atomic_crtc_get_property(struct drm_crtc *crtc, > *val = (state->ctm) ? state->ctm->base.id : 0; > else if (property == config->gamma_lut_property) > *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; >+ else if (property == config->prop_out_fence_ptr) >+ *val = 0; > else if (crtc->funcs->atomic_get_property) > return crtc->funcs->atomic_get_property(crtc, state, property, val); > else >@@ -1664,11 +1693,9 @@ int drm_atomic_debugfs_init(struct drm_minor *minor) > */ > > static struct drm_pending_vblank_event *create_vblank_event( >- struct drm_device *dev, struct drm_file *file_priv, >- struct dma_fence *fence, uint64_t user_data) >+ struct drm_device *dev, uint64_t user_data) > { > struct drm_pending_vblank_event *e = NULL; >- int ret; > > e = kzalloc(sizeof *e, GFP_KERNEL); > if (!e) >@@ -1678,17 +1705,6 @@ static struct drm_pending_vblank_event *create_vblank_event( > e->event.base.length = sizeof(e->event); > e->event.user_data = user_data; > >- if (file_priv) { >- ret = drm_event_reserve_init(dev, file_priv, &e->base, >- &e->event.base); >- if (ret) { >- kfree(e); >- return NULL; >- } >- } >- >- e->base.fence = fence; >- > return e; > } > >@@ -1793,6 +1809,165 @@ void drm_atomic_clean_old_fb(struct drm_device *dev, > } > EXPORT_SYMBOL(drm_atomic_clean_old_fb); > >+static struct dma_fence *get_crtc_fence(struct drm_crtc *crtc) >+{ >+ struct dma_fence *fence; >+ >+ fence = kzalloc(sizeof(*fence), GFP_KERNEL); >+ if (!fence) >+ return NULL; >+ >+ dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock, >+ crtc->fence_context, ++crtc->fence_seqno); >+ >+ return fence; >+} >+ >+struct drm_out_fence_state { >+ s64 __user *out_fence_ptr; >+ struct sync_file *sync_file; >+ int fd; >+}; >+ >+static int setup_out_fence(struct drm_out_fence_state *fence_state, >+ struct dma_fence *fence) >+{ >+ fence_state->fd = get_unused_fd_flags(O_CLOEXEC); >+ if (fence_state->fd < 0) >+ return fence_state->fd; >+ >+ if (put_user(fence_state->fd, fence_state->out_fence_ptr)) >+ return -EFAULT; >+ >+ fence_state->sync_file = sync_file_create(fence); >+ if(!fence_state->sync_file) >+ return -ENOMEM; >+ >+ return 0; >+} >+ >+static int prepare_crtc_signaling(struct drm_device *dev, >+ struct drm_atomic_state *state, >+ struct drm_mode_atomic *arg, >+ struct drm_file *file_priv, >+ struct drm_out_fence_state **fence_state, >+ unsigned int *num_fences) >+{ >+ struct drm_crtc *crtc; >+ struct drm_crtc_state *crtc_state; >+ int i, ret; >+ >+ if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) >+ return 0; >+ >+ for_each_crtc_in_state(state, crtc, crtc_state, i) { >+ u64 __user *fence_ptr; >+ >+ fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); >+ >+ if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { >+ struct drm_pending_vblank_event *e; >+ >+ e = create_vblank_event(dev, arg->user_data); >+ if (!e) >+ return -ENOMEM; >+ >+ crtc_state->event = e; >+ } >+ >+ if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { >+ struct drm_pending_vblank_event *e = crtc_state->event; >+ >+ if (!file_priv) >+ continue; >+ >+ ret = drm_event_reserve_init(dev, file_priv, &e->base, >+ &e->event.base); >+ if (ret) { >+ kfree(e); >+ crtc_state->event = NULL; >+ return ret; >+ } >+ } >+ >+ if (fence_ptr) { >+ struct dma_fence *fence; >+ struct drm_out_fence_state *f; >+ >+ f = krealloc(*fence_state, sizeof(**fence_state) * >+ (*num_fences + 1), GFP_KERNEL); >+ if (!f) >+ return -ENOMEM; >+ >+ memset(&f[*num_fences], 0, sizeof(*f)); >+ >+ f[*num_fences].out_fence_ptr = fence_ptr; >+ *fence_state = f; >+ >+ fence = get_crtc_fence(crtc); >+ if (!fence) { >+ (*num_fences)++; You shouldn't need this increment anymore, now that they all get set to -1 at the start. I don't mind either way though. >+ return -ENOMEM; >+ } >+ >+ ret = setup_out_fence(&f[(*num_fences)++], fence); >+ if (ret) { >+ dma_fence_put(fence); >+ return ret; >+ } >+ >+ crtc_state->event->base.fence = fence; >+ } >+ } >+ >+ return 0; >+} >+ >+static void complete_crtc_signaling(struct drm_device *dev, >+ struct drm_atomic_state *state, >+ struct drm_out_fence_state *fence_state, >+ unsigned int num_fences, >+ bool install_fds) >+{ >+ struct drm_crtc *crtc; >+ struct drm_crtc_state *crtc_state; >+ int i; >+ >+ if (install_fds) { >+ for (i = 0; i < num_fences; i++) >+ fd_install(fence_state[i].fd, >+ fence_state[i].sync_file->file); >+ return; Need to kfree(fence_state) before returning here? Must have got lost somewhere in the v6 refactor. With that addressed: Reviewed-by: Brian Starkey <brian.starkey@arm.com> Cheers, -Brian >+ } >+ >+ for_each_crtc_in_state(state, crtc, crtc_state, i) { >+ /* >+ * TEST_ONLY and PAGE_FLIP_EVENT are mutually >+ * exclusive, if they weren't, this code should be >+ * called on success for TEST_ONLY too. >+ */ >+ if (crtc_state->event) >+ drm_event_cancel_free(dev, &crtc_state->event->base); >+ } >+ >+ if (!fence_state) >+ return; >+ >+ for (i = 0; i < num_fences; i++) { >+ if (fence_state[i].sync_file) >+ fput(fence_state[i].sync_file->file); >+ if (fence_state[i].fd >= 0) >+ put_unused_fd(fence_state[i].fd); >+ >+ /* If this fails log error to the user */ >+ if (fence_state[i].out_fence_ptr && >+ put_user(-1, fence_state[i].out_fence_ptr)) >+ DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n"); >+ } >+ >+ kfree(fence_state); >+} >+ > int drm_mode_atomic_ioctl(struct drm_device *dev, > void *data, struct drm_file *file_priv) > { >@@ -1805,11 +1980,10 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, > struct drm_atomic_state *state; > struct drm_modeset_acquire_ctx ctx; > struct drm_plane *plane; >- struct drm_crtc *crtc; >- struct drm_crtc_state *crtc_state; >+ struct drm_out_fence_state *fence_state = NULL; > unsigned plane_mask; > int ret = 0; >- unsigned int i, j; >+ unsigned int i, j, num_fences = 0; > > /* disallow for drivers not supporting atomic: */ > if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) >@@ -1924,20 +2098,10 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, > drm_mode_object_unreference(obj); > } > >- if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { >- for_each_crtc_in_state(state, crtc, crtc_state, i) { >- struct drm_pending_vblank_event *e; >- >- e = create_vblank_event(dev, file_priv, NULL, >- arg->user_data); >- if (!e) { >- ret = -ENOMEM; >- goto out; >- } >- >- crtc_state->event = e; >- } >- } >+ ret = prepare_crtc_signaling(dev, state, arg, file_priv, &fence_state, >+ &num_fences); >+ if (ret) >+ goto out; > > if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { > /* >@@ -1957,20 +2121,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, > out: > drm_atomic_clean_old_fb(dev, plane_mask, ret); > >- if (ret && arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { >- /* >- * TEST_ONLY and PAGE_FLIP_EVENT are mutually exclusive, >- * if they weren't, this code should be called on success >- * for TEST_ONLY too. >- */ >- >- for_each_crtc_in_state(state, crtc, crtc_state, i) { >- if (!crtc_state->event) >- continue; >- >- drm_event_cancel_free(dev, &crtc_state->event->base); >- } >- } >+ complete_crtc_signaling(dev, state, fence_state, num_fences, !ret); > > if (ret == -EDEADLK) { > drm_atomic_state_clear(state); >diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c >index 20ddaff..cf2423d 100644 >--- a/drivers/gpu/drm/drm_crtc.c >+++ b/drivers/gpu/drm/drm_crtc.c >@@ -274,6 +274,8 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, > if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { > drm_object_attach_property(&crtc->base, config->prop_active, 0); > drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); >+ drm_object_attach_property(&crtc->base, >+ config->prop_out_fence_ptr, 0); > } > > return 0; >@@ -434,6 +436,12 @@ static int drm_mode_create_standard_properties(struct drm_device *dev) > return -ENOMEM; > dev->mode_config.prop_in_fence_fd = prop; > >+ prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, >+ "OUT_FENCE_PTR", 0, U64_MAX); >+ if (!prop) >+ return -ENOMEM; >+ dev->mode_config.prop_out_fence_ptr = prop; >+ > prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, > "CRTC_ID", DRM_MODE_OBJECT_CRTC); > if (!prop) >diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h >index 331bb10..c0eaec7 100644 >--- a/include/drm/drm_atomic.h >+++ b/include/drm/drm_atomic.h >@@ -144,6 +144,7 @@ struct __drm_crtcs_state { > struct drm_crtc *ptr; > struct drm_crtc_state *state; > struct drm_crtc_commit *commit; >+ s64 __user *out_fence_ptr; > }; > > struct __drm_connnectors_state { >diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h >index 0870de1..44571bc 100644 >--- a/include/drm/drm_crtc.h >+++ b/include/drm/drm_crtc.h >@@ -1264,6 +1264,12 @@ struct drm_mode_config { > */ > struct drm_property *prop_in_fence_fd; > /** >+ * @prop_out_fence_ptr: Sync File fd pointer representing the >+ * outgoing fences for a CRTC. Userspace should provide a pointer to a >+ * value of type s64, and then cast that pointer to u64. >+ */ >+ struct drm_property *prop_out_fence_ptr; >+ /** > * @prop_crtc_id: Default atomic plane property to specify the > * &drm_crtc. > */ >-- >2.5.5 >
Hi Gustavo, I was just writing some internal docs, and it occurred to me that the out-fence implementation here doesn't seem to match what we discussed with Ville a few weeks back (which had completely slipped my mind). Did the idea of returning -1 fences for multiple commits within a frame get dropped? I didn't see any discussion further than that thread on v5 from October: http://lkml.iu.edu/hypermail/linux/kernel/1610.2/04727.html Cheers, Brian On Mon, Nov 14, 2016 at 10:59:56AM +0900, Gustavo Padovan wrote: >From: Gustavo Padovan <gustavo.padovan@collabora.co.uk> > >Support DRM out-fences by creating a sync_file with a fence for each CRTC >that sets the OUT_FENCE_PTR property. > >We use the out_fence pointer received in the OUT_FENCE_PTR prop to send >the sync_file fd back to userspace. > >The sync_file and fd are allocated/created before commit, but the >fd_install operation only happens after we know that commit succeed. > >v2: Comment by Rob Clark: > - Squash commit that adds DRM_MODE_ATOMIC_OUT_FENCE flag here. > > Comment by Daniel Vetter: > - Add clean up code for out_fences > >v3: Comments by Daniel Vetter: > - create DRM_MODE_ATOMIC_EVENT_MASK > - userspace should fill out_fences_ptr with the crtc_ids for which > it wants fences back. > >v4: Create OUT_FENCE_PTR properties and remove old approach. > >v5: Comments by Brian Starkey: > - Remove extra fence_get() in atomic_ioctl() > - Check ret before iterating on the crtc_state > - check ret before fd_install > - set fence_state to NULL at the beginning > - check fence_state->out_fence_ptr before put_user() > - change order of fput() and put_unused_fd() on failure > > - Add access_ok() check to the out_fence_ptr received > - Rebase after fence -> dma_fence rename > - Store out_fence_ptr in the drm_atomic_state > - Split crtc_setup_out_fence() > - return -1 as out_fence with TEST_ONLY flag > >v6: Comments by Daniel Vetter > - Add prepare/unprepare_crtc_signaling() > - move struct drm_out_fence_state to drm_atomic.c > - mark get_crtc_fence() as static > > Comments by Brian Starkey > - proper set fence_ptr fence_state array > - isolate fence_idx increment > > - improve error handling > >v7: Comments by Daniel Vetter > - remove prefix from internal functions > - make out_fence_ptr an s64 pointer > - degrade DRM_INFO to DRM_DEBUG_ATOMIC when put_user fail > - fix doc issues > - filter out OUT_FENCE_PTR == NULL and do not fail in this case > - add complete_crtc_signalling() > - krealloc fence_state on demand > > Comment by Brian Starkey > - remove unused crtc_state arg from get_out_fence() > >v8: Comment by Brian Starkey > - cancel events before check for !fence_state > - convert a few lefovers u64 types for out_fence_ptr > - fix memleak by assign fence_state earlier after realloc > - proper accout num_fences in case of error > >v9: Comment by Brian Starkey > - memset last position of fence_state after krealloc > Comments by Sean Paul > - pass install_fds in complete_crtc_signaling() instead of ret > > - put_user(-1, fence_ptr) when decoding props > >Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> >--- > drivers/gpu/drm/drm_atomic.c | 241 +++++++++++++++++++++++++++++++++++-------- > drivers/gpu/drm/drm_crtc.c | 8 ++ > include/drm/drm_atomic.h | 1 + > include/drm/drm_crtc.h | 6 ++ > 4 files changed, 211 insertions(+), 45 deletions(-) > >diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c >index 3ad780a..27e5c0a 100644 >--- a/drivers/gpu/drm/drm_atomic.c >+++ b/drivers/gpu/drm/drm_atomic.c >@@ -290,6 +290,23 @@ drm_atomic_get_crtc_state(struct drm_atomic_state *state, > } > EXPORT_SYMBOL(drm_atomic_get_crtc_state); > >+static void set_out_fence_for_crtc(struct drm_atomic_state *state, >+ struct drm_crtc *crtc, s64 __user *fence_ptr) >+{ >+ state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr; >+} >+ >+static s64 __user * get_out_fence_for_crtc(struct drm_atomic_state *state, >+ struct drm_crtc *crtc) >+{ >+ s64 __user *fence_ptr; >+ >+ fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr; >+ state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL; >+ >+ return fence_ptr; >+} >+ > /** > * drm_atomic_set_mode_for_crtc - set mode for CRTC > * @state: the CRTC whose incoming state to update >@@ -494,6 +511,16 @@ int drm_atomic_crtc_set_property(struct drm_crtc *crtc, > &replaced); > state->color_mgmt_changed |= replaced; > return ret; >+ } else if (property == config->prop_out_fence_ptr) { >+ s64 __user *fence_ptr = u64_to_user_ptr(val); >+ >+ if (!fence_ptr) >+ return 0; >+ >+ if (put_user(-1, fence_ptr)) >+ return -EFAULT; >+ >+ set_out_fence_for_crtc(state->state, crtc, fence_ptr); > } else if (crtc->funcs->atomic_set_property) > return crtc->funcs->atomic_set_property(crtc, state, property, val); > else >@@ -536,6 +563,8 @@ drm_atomic_crtc_get_property(struct drm_crtc *crtc, > *val = (state->ctm) ? state->ctm->base.id : 0; > else if (property == config->gamma_lut_property) > *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; >+ else if (property == config->prop_out_fence_ptr) >+ *val = 0; > else if (crtc->funcs->atomic_get_property) > return crtc->funcs->atomic_get_property(crtc, state, property, val); > else >@@ -1664,11 +1693,9 @@ int drm_atomic_debugfs_init(struct drm_minor *minor) > */ > > static struct drm_pending_vblank_event *create_vblank_event( >- struct drm_device *dev, struct drm_file *file_priv, >- struct dma_fence *fence, uint64_t user_data) >+ struct drm_device *dev, uint64_t user_data) > { > struct drm_pending_vblank_event *e = NULL; >- int ret; > > e = kzalloc(sizeof *e, GFP_KERNEL); > if (!e) >@@ -1678,17 +1705,6 @@ static struct drm_pending_vblank_event *create_vblank_event( > e->event.base.length = sizeof(e->event); > e->event.user_data = user_data; > >- if (file_priv) { >- ret = drm_event_reserve_init(dev, file_priv, &e->base, >- &e->event.base); >- if (ret) { >- kfree(e); >- return NULL; >- } >- } >- >- e->base.fence = fence; >- > return e; > } > >@@ -1793,6 +1809,165 @@ void drm_atomic_clean_old_fb(struct drm_device *dev, > } > EXPORT_SYMBOL(drm_atomic_clean_old_fb); > >+static struct dma_fence *get_crtc_fence(struct drm_crtc *crtc) >+{ >+ struct dma_fence *fence; >+ >+ fence = kzalloc(sizeof(*fence), GFP_KERNEL); >+ if (!fence) >+ return NULL; >+ >+ dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock, >+ crtc->fence_context, ++crtc->fence_seqno); >+ >+ return fence; >+} >+ >+struct drm_out_fence_state { >+ s64 __user *out_fence_ptr; >+ struct sync_file *sync_file; >+ int fd; >+}; >+ >+static int setup_out_fence(struct drm_out_fence_state *fence_state, >+ struct dma_fence *fence) >+{ >+ fence_state->fd = get_unused_fd_flags(O_CLOEXEC); >+ if (fence_state->fd < 0) >+ return fence_state->fd; >+ >+ if (put_user(fence_state->fd, fence_state->out_fence_ptr)) >+ return -EFAULT; >+ >+ fence_state->sync_file = sync_file_create(fence); >+ if(!fence_state->sync_file) >+ return -ENOMEM; >+ >+ return 0; >+} >+ >+static int prepare_crtc_signaling(struct drm_device *dev, >+ struct drm_atomic_state *state, >+ struct drm_mode_atomic *arg, >+ struct drm_file *file_priv, >+ struct drm_out_fence_state **fence_state, >+ unsigned int *num_fences) >+{ >+ struct drm_crtc *crtc; >+ struct drm_crtc_state *crtc_state; >+ int i, ret; >+ >+ if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) >+ return 0; >+ >+ for_each_crtc_in_state(state, crtc, crtc_state, i) { >+ u64 __user *fence_ptr; >+ >+ fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); >+ >+ if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { >+ struct drm_pending_vblank_event *e; >+ >+ e = create_vblank_event(dev, arg->user_data); >+ if (!e) >+ return -ENOMEM; >+ >+ crtc_state->event = e; >+ } >+ >+ if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { >+ struct drm_pending_vblank_event *e = crtc_state->event; >+ >+ if (!file_priv) >+ continue; >+ >+ ret = drm_event_reserve_init(dev, file_priv, &e->base, >+ &e->event.base); >+ if (ret) { >+ kfree(e); >+ crtc_state->event = NULL; >+ return ret; >+ } >+ } >+ >+ if (fence_ptr) { >+ struct dma_fence *fence; >+ struct drm_out_fence_state *f; >+ >+ f = krealloc(*fence_state, sizeof(**fence_state) * >+ (*num_fences + 1), GFP_KERNEL); >+ if (!f) >+ return -ENOMEM; >+ >+ memset(&f[*num_fences], 0, sizeof(*f)); >+ >+ f[*num_fences].out_fence_ptr = fence_ptr; >+ *fence_state = f; >+ >+ fence = get_crtc_fence(crtc); >+ if (!fence) { >+ (*num_fences)++; >+ return -ENOMEM; >+ } >+ >+ ret = setup_out_fence(&f[(*num_fences)++], fence); >+ if (ret) { >+ dma_fence_put(fence); >+ return ret; >+ } >+ >+ crtc_state->event->base.fence = fence; >+ } >+ } >+ >+ return 0; >+} >+ >+static void complete_crtc_signaling(struct drm_device *dev, >+ struct drm_atomic_state *state, >+ struct drm_out_fence_state *fence_state, >+ unsigned int num_fences, >+ bool install_fds) >+{ >+ struct drm_crtc *crtc; >+ struct drm_crtc_state *crtc_state; >+ int i; >+ >+ if (install_fds) { >+ for (i = 0; i < num_fences; i++) >+ fd_install(fence_state[i].fd, >+ fence_state[i].sync_file->file); >+ return; >+ } >+ >+ for_each_crtc_in_state(state, crtc, crtc_state, i) { >+ /* >+ * TEST_ONLY and PAGE_FLIP_EVENT are mutually >+ * exclusive, if they weren't, this code should be >+ * called on success for TEST_ONLY too. >+ */ >+ if (crtc_state->event) >+ drm_event_cancel_free(dev, &crtc_state->event->base); >+ } >+ >+ if (!fence_state) >+ return; >+ >+ for (i = 0; i < num_fences; i++) { >+ if (fence_state[i].sync_file) >+ fput(fence_state[i].sync_file->file); >+ if (fence_state[i].fd >= 0) >+ put_unused_fd(fence_state[i].fd); >+ >+ /* If this fails log error to the user */ >+ if (fence_state[i].out_fence_ptr && >+ put_user(-1, fence_state[i].out_fence_ptr)) >+ DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n"); >+ } >+ >+ kfree(fence_state); >+} >+ > int drm_mode_atomic_ioctl(struct drm_device *dev, > void *data, struct drm_file *file_priv) > { >@@ -1805,11 +1980,10 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, > struct drm_atomic_state *state; > struct drm_modeset_acquire_ctx ctx; > struct drm_plane *plane; >- struct drm_crtc *crtc; >- struct drm_crtc_state *crtc_state; >+ struct drm_out_fence_state *fence_state = NULL; > unsigned plane_mask; > int ret = 0; >- unsigned int i, j; >+ unsigned int i, j, num_fences = 0; > > /* disallow for drivers not supporting atomic: */ > if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) >@@ -1924,20 +2098,10 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, > drm_mode_object_unreference(obj); > } > >- if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { >- for_each_crtc_in_state(state, crtc, crtc_state, i) { >- struct drm_pending_vblank_event *e; >- >- e = create_vblank_event(dev, file_priv, NULL, >- arg->user_data); >- if (!e) { >- ret = -ENOMEM; >- goto out; >- } >- >- crtc_state->event = e; >- } >- } >+ ret = prepare_crtc_signaling(dev, state, arg, file_priv, &fence_state, >+ &num_fences); >+ if (ret) >+ goto out; > > if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { > /* >@@ -1957,20 +2121,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, > out: > drm_atomic_clean_old_fb(dev, plane_mask, ret); > >- if (ret && arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { >- /* >- * TEST_ONLY and PAGE_FLIP_EVENT are mutually exclusive, >- * if they weren't, this code should be called on success >- * for TEST_ONLY too. >- */ >- >- for_each_crtc_in_state(state, crtc, crtc_state, i) { >- if (!crtc_state->event) >- continue; >- >- drm_event_cancel_free(dev, &crtc_state->event->base); >- } >- } >+ complete_crtc_signaling(dev, state, fence_state, num_fences, !ret); > > if (ret == -EDEADLK) { > drm_atomic_state_clear(state); >diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c >index 20ddaff..cf2423d 100644 >--- a/drivers/gpu/drm/drm_crtc.c >+++ b/drivers/gpu/drm/drm_crtc.c >@@ -274,6 +274,8 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, > if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { > drm_object_attach_property(&crtc->base, config->prop_active, 0); > drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); >+ drm_object_attach_property(&crtc->base, >+ config->prop_out_fence_ptr, 0); > } > > return 0; >@@ -434,6 +436,12 @@ static int drm_mode_create_standard_properties(struct drm_device *dev) > return -ENOMEM; > dev->mode_config.prop_in_fence_fd = prop; > >+ prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, >+ "OUT_FENCE_PTR", 0, U64_MAX); >+ if (!prop) >+ return -ENOMEM; >+ dev->mode_config.prop_out_fence_ptr = prop; >+ > prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, > "CRTC_ID", DRM_MODE_OBJECT_CRTC); > if (!prop) >diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h >index 331bb10..c0eaec7 100644 >--- a/include/drm/drm_atomic.h >+++ b/include/drm/drm_atomic.h >@@ -144,6 +144,7 @@ struct __drm_crtcs_state { > struct drm_crtc *ptr; > struct drm_crtc_state *state; > struct drm_crtc_commit *commit; >+ s64 __user *out_fence_ptr; > }; > > struct __drm_connnectors_state { >diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h >index 0870de1..44571bc 100644 >--- a/include/drm/drm_crtc.h >+++ b/include/drm/drm_crtc.h >@@ -1264,6 +1264,12 @@ struct drm_mode_config { > */ > struct drm_property *prop_in_fence_fd; > /** >+ * @prop_out_fence_ptr: Sync File fd pointer representing the >+ * outgoing fences for a CRTC. Userspace should provide a pointer to a >+ * value of type s64, and then cast that pointer to u64. >+ */ >+ struct drm_property *prop_out_fence_ptr; >+ /** > * @prop_crtc_id: Default atomic plane property to specify the > * &drm_crtc. > */ >-- >2.5.5 >
Tested on db410c running android + drm_hwcomposer, confirmed to be
working.
Tested-by: Robert Foss <robert.foss@collabora.com>
On Mon, Nov 14, 2016 at 3:57 PM, Brian Starkey <brian.starkey@arm.com> wrote: > I was just writing some internal docs, and it occurred to me that the > out-fence implementation here doesn't seem to match what we discussed > with Ville a few weeks back (which had completely slipped my mind). > > Did the idea of returning -1 fences for multiple commits within a > frame get dropped? I didn't see any discussion further than that > thread on v5 from October: > http://lkml.iu.edu/hypermail/linux/kernel/1610.2/04727.html Atm we only support a queue depth of 1, and not faster than vblank. This was just discussions to make sure we're not drawing ourselves into a corner with this uabi. -Daniel
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 3ad780a..27e5c0a 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -290,6 +290,23 @@ drm_atomic_get_crtc_state(struct drm_atomic_state *state, } EXPORT_SYMBOL(drm_atomic_get_crtc_state); +static void set_out_fence_for_crtc(struct drm_atomic_state *state, + struct drm_crtc *crtc, s64 __user *fence_ptr) +{ + state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr; +} + +static s64 __user * get_out_fence_for_crtc(struct drm_atomic_state *state, + struct drm_crtc *crtc) +{ + s64 __user *fence_ptr; + + fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr; + state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL; + + return fence_ptr; +} + /** * drm_atomic_set_mode_for_crtc - set mode for CRTC * @state: the CRTC whose incoming state to update @@ -494,6 +511,16 @@ int drm_atomic_crtc_set_property(struct drm_crtc *crtc, &replaced); state->color_mgmt_changed |= replaced; return ret; + } else if (property == config->prop_out_fence_ptr) { + s64 __user *fence_ptr = u64_to_user_ptr(val); + + if (!fence_ptr) + return 0; + + if (put_user(-1, fence_ptr)) + return -EFAULT; + + set_out_fence_for_crtc(state->state, crtc, fence_ptr); } else if (crtc->funcs->atomic_set_property) return crtc->funcs->atomic_set_property(crtc, state, property, val); else @@ -536,6 +563,8 @@ drm_atomic_crtc_get_property(struct drm_crtc *crtc, *val = (state->ctm) ? state->ctm->base.id : 0; else if (property == config->gamma_lut_property) *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; + else if (property == config->prop_out_fence_ptr) + *val = 0; else if (crtc->funcs->atomic_get_property) return crtc->funcs->atomic_get_property(crtc, state, property, val); else @@ -1664,11 +1693,9 @@ int drm_atomic_debugfs_init(struct drm_minor *minor) */ static struct drm_pending_vblank_event *create_vblank_event( - struct drm_device *dev, struct drm_file *file_priv, - struct dma_fence *fence, uint64_t user_data) + struct drm_device *dev, uint64_t user_data) { struct drm_pending_vblank_event *e = NULL; - int ret; e = kzalloc(sizeof *e, GFP_KERNEL); if (!e) @@ -1678,17 +1705,6 @@ static struct drm_pending_vblank_event *create_vblank_event( e->event.base.length = sizeof(e->event); e->event.user_data = user_data; - if (file_priv) { - ret = drm_event_reserve_init(dev, file_priv, &e->base, - &e->event.base); - if (ret) { - kfree(e); - return NULL; - } - } - - e->base.fence = fence; - return e; } @@ -1793,6 +1809,165 @@ void drm_atomic_clean_old_fb(struct drm_device *dev, } EXPORT_SYMBOL(drm_atomic_clean_old_fb); +static struct dma_fence *get_crtc_fence(struct drm_crtc *crtc) +{ + struct dma_fence *fence; + + fence = kzalloc(sizeof(*fence), GFP_KERNEL); + if (!fence) + return NULL; + + dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock, + crtc->fence_context, ++crtc->fence_seqno); + + return fence; +} + +struct drm_out_fence_state { + s64 __user *out_fence_ptr; + struct sync_file *sync_file; + int fd; +}; + +static int setup_out_fence(struct drm_out_fence_state *fence_state, + struct dma_fence *fence) +{ + fence_state->fd = get_unused_fd_flags(O_CLOEXEC); + if (fence_state->fd < 0) + return fence_state->fd; + + if (put_user(fence_state->fd, fence_state->out_fence_ptr)) + return -EFAULT; + + fence_state->sync_file = sync_file_create(fence); + if(!fence_state->sync_file) + return -ENOMEM; + + return 0; +} + +static int prepare_crtc_signaling(struct drm_device *dev, + struct drm_atomic_state *state, + struct drm_mode_atomic *arg, + struct drm_file *file_priv, + struct drm_out_fence_state **fence_state, + unsigned int *num_fences) +{ + struct drm_crtc *crtc; + struct drm_crtc_state *crtc_state; + int i, ret; + + if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) + return 0; + + for_each_crtc_in_state(state, crtc, crtc_state, i) { + u64 __user *fence_ptr; + + fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc); + + if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) { + struct drm_pending_vblank_event *e; + + e = create_vblank_event(dev, arg->user_data); + if (!e) + return -ENOMEM; + + crtc_state->event = e; + } + + if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { + struct drm_pending_vblank_event *e = crtc_state->event; + + if (!file_priv) + continue; + + ret = drm_event_reserve_init(dev, file_priv, &e->base, + &e->event.base); + if (ret) { + kfree(e); + crtc_state->event = NULL; + return ret; + } + } + + if (fence_ptr) { + struct dma_fence *fence; + struct drm_out_fence_state *f; + + f = krealloc(*fence_state, sizeof(**fence_state) * + (*num_fences + 1), GFP_KERNEL); + if (!f) + return -ENOMEM; + + memset(&f[*num_fences], 0, sizeof(*f)); + + f[*num_fences].out_fence_ptr = fence_ptr; + *fence_state = f; + + fence = get_crtc_fence(crtc); + if (!fence) { + (*num_fences)++; + return -ENOMEM; + } + + ret = setup_out_fence(&f[(*num_fences)++], fence); + if (ret) { + dma_fence_put(fence); + return ret; + } + + crtc_state->event->base.fence = fence; + } + } + + return 0; +} + +static void complete_crtc_signaling(struct drm_device *dev, + struct drm_atomic_state *state, + struct drm_out_fence_state *fence_state, + unsigned int num_fences, + bool install_fds) +{ + struct drm_crtc *crtc; + struct drm_crtc_state *crtc_state; + int i; + + if (install_fds) { + for (i = 0; i < num_fences; i++) + fd_install(fence_state[i].fd, + fence_state[i].sync_file->file); + return; + } + + for_each_crtc_in_state(state, crtc, crtc_state, i) { + /* + * TEST_ONLY and PAGE_FLIP_EVENT are mutually + * exclusive, if they weren't, this code should be + * called on success for TEST_ONLY too. + */ + if (crtc_state->event) + drm_event_cancel_free(dev, &crtc_state->event->base); + } + + if (!fence_state) + return; + + for (i = 0; i < num_fences; i++) { + if (fence_state[i].sync_file) + fput(fence_state[i].sync_file->file); + if (fence_state[i].fd >= 0) + put_unused_fd(fence_state[i].fd); + + /* If this fails log error to the user */ + if (fence_state[i].out_fence_ptr && + put_user(-1, fence_state[i].out_fence_ptr)) + DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n"); + } + + kfree(fence_state); +} + int drm_mode_atomic_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { @@ -1805,11 +1980,10 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, struct drm_atomic_state *state; struct drm_modeset_acquire_ctx ctx; struct drm_plane *plane; - struct drm_crtc *crtc; - struct drm_crtc_state *crtc_state; + struct drm_out_fence_state *fence_state = NULL; unsigned plane_mask; int ret = 0; - unsigned int i, j; + unsigned int i, j, num_fences = 0; /* disallow for drivers not supporting atomic: */ if (!drm_core_check_feature(dev, DRIVER_ATOMIC)) @@ -1924,20 +2098,10 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, drm_mode_object_unreference(obj); } - if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { - for_each_crtc_in_state(state, crtc, crtc_state, i) { - struct drm_pending_vblank_event *e; - - e = create_vblank_event(dev, file_priv, NULL, - arg->user_data); - if (!e) { - ret = -ENOMEM; - goto out; - } - - crtc_state->event = e; - } - } + ret = prepare_crtc_signaling(dev, state, arg, file_priv, &fence_state, + &num_fences); + if (ret) + goto out; if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) { /* @@ -1957,20 +2121,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, out: drm_atomic_clean_old_fb(dev, plane_mask, ret); - if (ret && arg->flags & DRM_MODE_PAGE_FLIP_EVENT) { - /* - * TEST_ONLY and PAGE_FLIP_EVENT are mutually exclusive, - * if they weren't, this code should be called on success - * for TEST_ONLY too. - */ - - for_each_crtc_in_state(state, crtc, crtc_state, i) { - if (!crtc_state->event) - continue; - - drm_event_cancel_free(dev, &crtc_state->event->base); - } - } + complete_crtc_signaling(dev, state, fence_state, num_fences, !ret); if (ret == -EDEADLK) { drm_atomic_state_clear(state); diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 20ddaff..cf2423d 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -274,6 +274,8 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { drm_object_attach_property(&crtc->base, config->prop_active, 0); drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); + drm_object_attach_property(&crtc->base, + config->prop_out_fence_ptr, 0); } return 0; @@ -434,6 +436,12 @@ static int drm_mode_create_standard_properties(struct drm_device *dev) return -ENOMEM; dev->mode_config.prop_in_fence_fd = prop; + prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, + "OUT_FENCE_PTR", 0, U64_MAX); + if (!prop) + return -ENOMEM; + dev->mode_config.prop_out_fence_ptr = prop; + prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, "CRTC_ID", DRM_MODE_OBJECT_CRTC); if (!prop) diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h index 331bb10..c0eaec7 100644 --- a/include/drm/drm_atomic.h +++ b/include/drm/drm_atomic.h @@ -144,6 +144,7 @@ struct __drm_crtcs_state { struct drm_crtc *ptr; struct drm_crtc_state *state; struct drm_crtc_commit *commit; + s64 __user *out_fence_ptr; }; struct __drm_connnectors_state { diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 0870de1..44571bc 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -1264,6 +1264,12 @@ struct drm_mode_config { */ struct drm_property *prop_in_fence_fd; /** + * @prop_out_fence_ptr: Sync File fd pointer representing the + * outgoing fences for a CRTC. Userspace should provide a pointer to a + * value of type s64, and then cast that pointer to u64. + */ + struct drm_property *prop_out_fence_ptr; + /** * @prop_crtc_id: Default atomic plane property to specify the * &drm_crtc. */