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[PATCH 1/2] dma-buf/dma_fence_array: remove unused functionality v3

by Christian König

Amdgpu was the only user of the signal on any feature and we dropped that use case recently, so we can remove that functionality. v2: update num_pending only after the fence is signaled v3: separate out simplifying dma_fence_array implementation Signed-off-by: Christian König <christian.koenig(a)amd.com> --- drivers/dma-buf/dma-fence-array.c | 13 ++++--------- drivers/dma-buf/dma-fence-unwrap.c | 3 +-- drivers/dma-buf/dma-resv.c | 3 +-- drivers/dma-buf/st-dma-fence-unwrap.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 3 +-- drivers/gpu/drm/xe/xe_sync.c | 2 +- drivers/gpu/drm/xe/xe_vm.c | 4 ++-- include/linux/dma-fence-array.h | 6 ++---- 8 files changed, 13 insertions(+), 23 deletions(-) diff --git a/drivers/dma-buf/dma-fence-array.c b/drivers/dma-buf/dma-fence-array.c index 089f69469524..5e10e8df372f 100644 --- a/drivers/dma-buf/dma-fence-array.c +++ b/drivers/dma-buf/dma-fence-array.c @@ -190,15 +190,13 @@ EXPORT_SYMBOL(dma_fence_array_alloc); * @fences: [in] array containing the fences * @context: [in] fence context to use * @seqno: [in] sequence number to use - * @signal_on_any: [in] signal on any fence in the array * * Implementation of @dma_fence_array_create without allocation. Useful to init * a preallocated dma fence array in the path of reclaim or dma fence signaling. */ void dma_fence_array_init(struct dma_fence_array *array, int num_fences, struct dma_fence **fences, - u64 context, unsigned seqno, - bool signal_on_any) + u64 context, unsigned seqno) { static struct lock_class_key dma_fence_array_lock_key; @@ -222,7 +220,7 @@ void dma_fence_array_init(struct dma_fence_array *array, */ lockdep_set_class(&array->base.inline_lock, &dma_fence_array_lock_key); - atomic_set(&array->num_pending, signal_on_any ? 1 : num_fences); + atomic_set(&array->num_pending, num_fences); array->fences = fences; array->base.error = PENDING_ERROR; @@ -249,7 +247,6 @@ EXPORT_SYMBOL(dma_fence_array_init); * @fences: [in] array containing the fences * @context: [in] fence context to use * @seqno: [in] sequence number to use - * @signal_on_any: [in] signal on any fence in the array * * Allocate a dma_fence_array object and initialize the base fence with * dma_fence_init(). @@ -264,8 +261,7 @@ EXPORT_SYMBOL(dma_fence_array_init); */ struct dma_fence_array *dma_fence_array_create(int num_fences, struct dma_fence **fences, - u64 context, unsigned seqno, - bool signal_on_any) + u64 context, unsigned seqno) { struct dma_fence_array *array; @@ -273,8 +269,7 @@ struct dma_fence_array *dma_fence_array_create(int num_fences, if (!array) return NULL; - dma_fence_array_init(array, num_fences, fences, - context, seqno, signal_on_any); + dma_fence_array_init(array, num_fences, fences, context, seqno); return array; } diff --git a/drivers/dma-buf/dma-fence-unwrap.c b/drivers/dma-buf/dma-fence-unwrap.c index 07fe9bf45aea..53bb40e70b27 100644 --- a/drivers/dma-buf/dma-fence-unwrap.c +++ b/drivers/dma-buf/dma-fence-unwrap.c @@ -180,8 +180,7 @@ struct dma_fence *__dma_fence_unwrap_merge(unsigned int num_fences, if (count > 1) { result = dma_fence_array_create(count, array, - dma_fence_context_alloc(1), - 1, false); + dma_fence_context_alloc(1), 1); if (!result) { for (i = 0; i < count; i++) dma_fence_put(array[i]); diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c index ce9e6c04897f..39a92d9f2413 100644 --- a/drivers/dma-buf/dma-resv.c +++ b/drivers/dma-buf/dma-resv.c @@ -648,8 +648,7 @@ int dma_resv_get_singleton(struct dma_resv *obj, enum dma_resv_usage usage, } array = dma_fence_array_create(count, fences, - dma_fence_context_alloc(1), - 1, false); + dma_fence_context_alloc(1), 1); if (!array) { while (count--) dma_fence_put(fences[count]); diff --git a/drivers/dma-buf/st-dma-fence-unwrap.c b/drivers/dma-buf/st-dma-fence-unwrap.c index 51c87869b7b8..4e7ee25372ba 100644 --- a/drivers/dma-buf/st-dma-fence-unwrap.c +++ b/drivers/dma-buf/st-dma-fence-unwrap.c @@ -64,7 +64,7 @@ static struct dma_fence *mock_array(unsigned int num_fences, ...) array = dma_fence_array_create(num_fences, fences, dma_fence_context_alloc(1), - 1, false); + 1); if (!array) goto error_free; return &array->base; diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index 942f4eed817f..4a1a9031f9db 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -3205,8 +3205,7 @@ eb_composite_fence_create(struct i915_execbuffer *eb, int out_fence_fd) fence_array = dma_fence_array_create(eb->num_batches, fences, eb->context->parallel.fence_context, - eb->context->parallel.seqno++, - false); + eb->context->parallel.seqno++); if (!fence_array) { kfree(fences); return ERR_PTR(-ENOMEM); diff --git a/drivers/gpu/drm/xe/xe_sync.c b/drivers/gpu/drm/xe/xe_sync.c index 24d6d9af20d6..37866768d64c 100644 --- a/drivers/gpu/drm/xe/xe_sync.c +++ b/drivers/gpu/drm/xe/xe_sync.c @@ -376,7 +376,7 @@ xe_sync_in_fence_get(struct xe_sync_entry *sync, int num_sync, xe_assert(vm->xe, current_fence == num_fence); cf = dma_fence_array_create(num_fence, fences, dma_fence_context_alloc(1), - 1, false); + 1); if (!cf) goto err_out; diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c index 56e2db50bb36..8f472911469d 100644 --- a/drivers/gpu/drm/xe/xe_vm.c +++ b/drivers/gpu/drm/xe/xe_vm.c @@ -3370,7 +3370,7 @@ static struct dma_fence *ops_execute(struct xe_vm *vm, goto err_trace; } - cf = dma_fence_array_alloc(n_fence); + cf = dma_fence_array_alloc(); if (!cf) { fence = ERR_PTR(-ENOMEM); goto err_out; @@ -3414,7 +3414,7 @@ static struct dma_fence *ops_execute(struct xe_vm *vm, xe_assert(vm->xe, current_fence == n_fence); dma_fence_array_init(cf, n_fence, fences, dma_fence_context_alloc(1), - 1, false); + 1); fence = &cf->base; for_each_tile(tile, vm->xe, id) { diff --git a/include/linux/dma-fence-array.h b/include/linux/dma-fence-array.h index 370b3d2bba37..1b1d87579c38 100644 --- a/include/linux/dma-fence-array.h +++ b/include/linux/dma-fence-array.h @@ -81,13 +81,11 @@ to_dma_fence_array(struct dma_fence *fence) struct dma_fence_array *dma_fence_array_alloc(int num_fences); void dma_fence_array_init(struct dma_fence_array *array, int num_fences, struct dma_fence **fences, - u64 context, unsigned seqno, - bool signal_on_any); + u64 context, unsigned seqno); struct dma_fence_array *dma_fence_array_create(int num_fences, struct dma_fence **fences, - u64 context, unsigned seqno, - bool signal_on_any); + u64 context, unsigned seqno); bool dma_fence_match_context(struct dma_fence *fence, u64 context); -- 2.43.0

2 days, 11 hours

[PATCH] dma-buf: system_heap: Optimize sg_table-to-pages conversion in vmap

by Barry Song (Xiaomi)

From: Xueyuan Chen <Xueyuan.chen21(a)gmail.com> Replace the heavy for_each_sgtable_page() iterator in system_heap_do_vmap() with a more efficient nested loop approach. Instead of iterating page by page, we now iterate through the scatterlist entries via for_each_sgtable_sg(). Because pages within a single sg entry are physically contiguous, we can populate the page array with a in an inner loop using simple pointer math. This save a lot of time. The WARN_ON check is also pulled out of the loop to save branch instructions. Performance results mapping a 2GB buffer on Radxa O6: - Before: ~1440000 ns - After: ~232000 ns (~84% reduction in iteration time, or ~6.2x faster) Cc: Sumit Semwal <sumit.semwal(a)linaro.org> Cc: Benjamin Gaignard <benjamin.gaignard(a)collabora.com> Cc: Brian Starkey <Brian.Starkey(a)arm.com> Cc: John Stultz <jstultz(a)google.com> Cc: T.J. Mercier <tjmercier(a)google.com> Cc: Christian König <christian.koenig(a)amd.com> Signed-off-by: Xueyuan Chen <Xueyuan.chen21(a)gmail.com> Signed-off-by: Barry Song (Xiaomi) <baohua(a)kernel.org> --- drivers/dma-buf/heaps/system_heap.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/dma-buf/heaps/system_heap.c b/drivers/dma-buf/heaps/system_heap.c index b3650d8fd651..769f01f0cc96 100644 --- a/drivers/dma-buf/heaps/system_heap.c +++ b/drivers/dma-buf/heaps/system_heap.c @@ -224,16 +224,21 @@ static void *system_heap_do_vmap(struct system_heap_buffer *buffer) int npages = PAGE_ALIGN(buffer->len) / PAGE_SIZE; struct page **pages = vmalloc(sizeof(struct page *) * npages); struct page **tmp = pages; - struct sg_page_iter piter; void *vaddr; + u32 i, j, count; + struct page *base_page; + struct scatterlist *sg; if (!pages) return ERR_PTR(-ENOMEM); - for_each_sgtable_page(table, &piter, 0) { - WARN_ON(tmp - pages >= npages); - *tmp++ = sg_page_iter_page(&piter); + for_each_sgtable_sg(table, sg, i) { + base_page = sg_page(sg); + count = sg->length >> PAGE_SHIFT; + for (j = 0; j < count; j++) + *tmp++ = base_page + j; } + WARN_ON(tmp - pages != npages); vaddr = vmap(pages, npages, VM_MAP, PAGE_KERNEL); vfree(pages); -- 2.39.3 (Apple Git-146)

2 days, 16 hours

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[PATCH v11 0/5] Rust bindings for gem shmem

by Lyude Paul

Most of this patch series has already been pushed upstream, this is just the second half of the patch series that has not been pushed yet + some additional changes which were required to implement changes requested by the mailing list. This patch series is originally from Asahi, previously posted by Daniel Almeida. The previous version of the patch series can be found here: https://patchwork.freedesktop.org/series/164580/ Branch with patches applied available here (+ a hack required to make sure this builds: https://gitlab.freedesktop.org/lyudess/linux/-/commits/rust/gem-shmem This patch series applies on top of drm-rust-next Lyude Paul (5): rust: drm: gem: s/device::Device/Device/ for shmem.rs drm/gem/shmem: Introduce __drm_gem_shmem_free_sgt_locked() drm/gem/shmem: Export drm_gem_shmem_get_pages_sgt_locked() rust: drm: gem: Introduce shmem::SGTable rust: drm: gem: Add vmap functions to shmem bindings drivers/gpu/drm/drm_gem_shmem_helper.c | 48 ++- include/drm/drm_gem_shmem_helper.h | 2 + rust/kernel/drm/gem/shmem.rs | 557 ++++++++++++++++++++++++- 3 files changed, 593 insertions(+), 14 deletions(-) base-commit: a7a080bb4236ebe577b6776d940d1717912ff6dd -- 2.53.0

2 days, 23 hours

[PATCH v10 0/5] Rust bindings for gem shmem

by Lyude Paul

Most of this patch series has already been pushed upstream, this is just the second half of the patch series that has not been pushed yet + some additional changes which were required to implement changes requested by the mailing list. This patch series is originally from Asahi, previously posted by Daniel Almeida. The previous version of the patch series can be found here: (apparently it mistakenly was not sent to dri-devel, so no patchwork ): https://patchwork.freedesktop.org/series/156093/ Branch with patches applied available here (+ a hack required to make sure this builds: https://gitlab.freedesktop.org/lyudess/linux/-/commits/rust/gem-shmem Lyude Paul (5): rust: drm: gem: s/device::Device/Device/ for shmem.rs drm/gem/shmem: Introduce __drm_gem_shmem_free_sgt_locked() drm/gem/shmem: Export drm_gem_shmem_get_pages_sgt_locked() rust: drm: gem: Introduce shmem::SGTable rust: drm: gem: Add vmap functions to shmem bindings drivers/gpu/drm/drm_gem_shmem_helper.c | 48 ++- include/drm/drm_gem_shmem_helper.h | 2 + rust/kernel/drm/gem/shmem.rs | 553 ++++++++++++++++++++++++- 3 files changed, 590 insertions(+), 13 deletions(-) base-commit: a7a080bb4236ebe577b6776d940d1717912ff6dd -- 2.53.0

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