From 45b17a809fda352086b63518e32d272cc3442ed5 Mon Sep 17 00:00:00 2001 From: Rebecca Schultz Zavin Date: Fri, 13 Dec 2013 14:24:11 -0800 Subject: [PATCH] gpu: ion: Use the ion_page_pool from the system heap With this change the system heap will use pagepools to avoid having to invalidate memory when it is allocated, a significant performance improvement on some systems. Signed-off-by: Rebecca Schultz Zavin [jstultz: modified patch to apply to staging directory] Signed-off-by: John Stultz Signed-off-by: Greg Kroah-Hartman --- drivers/staging/android/ion/ion.c | 18 ++- drivers/staging/android/ion/ion_priv.h | 11 ++ drivers/staging/android/ion/ion_system_heap.c | 191 +++++++++++++++++++++----- 3 files changed, 180 insertions(+), 40 deletions(-) diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c index 6c589cb..0070c9b 100644 --- a/drivers/staging/android/ion/ion.c +++ b/drivers/staging/android/ion/ion.c @@ -106,6 +106,11 @@ bool ion_buffer_fault_user_mappings(struct ion_buffer *buffer) !(buffer->flags & ION_FLAG_CACHED_NEEDS_SYNC)); } +bool ion_buffer_cached(struct ion_buffer *buffer) +{ + return !!(buffer->flags & ION_FLAG_CACHED); +} + /* this function should only be called while dev->lock is held */ static void ion_buffer_add(struct ion_device *dev, struct ion_buffer *buffer) @@ -1219,11 +1224,12 @@ static int ion_debug_heap_show(struct seq_file *s, void *unused) for (n = rb_first(&dev->buffers); n; n = rb_next(n)) { struct ion_buffer *buffer = rb_entry(n, struct ion_buffer, node); - if (buffer->heap->type == heap->type) - total_size += buffer->size; + if (buffer->heap->type != heap->type) + continue; + total_size += buffer->size; if (!buffer->handle_count) { - seq_printf(s, "%16.s %16u %16u\n", buffer->task_comm, - buffer->pid, buffer->size); + seq_printf(s, "%16.s %16u %16u %d %d\n", buffer->task_comm, + buffer->pid, buffer->size, buffer->kmap_cnt, buffer->ref); total_orphaned_size += buffer->size; } } @@ -1232,6 +1238,10 @@ static int ion_debug_heap_show(struct seq_file *s, void *unused) seq_printf(s, "%16.s %16u\n", "total orphaned", total_orphaned_size); seq_printf(s, "%16.s %16u\n", "total ", total_size); + seq_printf(s, "----------------------------------------------------\n"); + + if (heap->debug_show) + heap->debug_show(heap, s, unused); return 0; } diff --git a/drivers/staging/android/ion/ion_priv.h b/drivers/staging/android/ion/ion_priv.h index 0707733..9f32634 100644 --- a/drivers/staging/android/ion/ion_priv.h +++ b/drivers/staging/android/ion/ion_priv.h @@ -118,6 +118,8 @@ struct ion_heap_ops { * allocating. These are specified by platform data and * MUST be unique * @name: used for debugging + * @debug_show: called when heap debug file is read to add any + * heap specific debug info to output * * Represents a pool of memory from which buffers can be made. In some * systems the only heap is regular system memory allocated via vmalloc. @@ -131,9 +133,18 @@ struct ion_heap { struct ion_heap_ops *ops; int id; const char *name; + int (*debug_show)(struct ion_heap *heap, struct seq_file *, void *); }; /** + * ion_buffer_cached - this ion buffer is cached + * @buffer: buffer + * + * indicates whether this ion buffer is cached + */ +bool ion_buffer_cached(struct ion_buffer *buffer); + +/** * ion_buffer_fault_user_mappings - fault in user mappings of this buffer * @buffer: buffer * diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c index fcfbb66..35fbfff 100644 --- a/drivers/staging/android/ion/ion_system_heap.c +++ b/drivers/staging/android/ion/ion_system_heap.c @@ -20,39 +20,112 @@ #include #include #include +#include #include #include #include "ion.h" #include "ion_priv.h" +static const unsigned int orders[] = {8, 4, 0}; +static const int num_orders = ARRAY_SIZE(orders); +static int order_to_index(unsigned int order) +{ + int i; + for (i = 0; i < num_orders; i++) + if (order == orders[i]) + return i; + BUG(); + return -1; +} + +static unsigned int order_to_size(int order) +{ + return PAGE_SIZE << order; +} + +struct ion_system_heap { + struct ion_heap heap; + struct ion_page_pool **pools; +}; + struct page_info { struct page *page; - unsigned long order; + unsigned int order; struct list_head list; }; -static unsigned int orders[] = {8, 4, 0}; +static struct page *alloc_buffer_page(struct ion_system_heap *heap, + struct ion_buffer *buffer, + unsigned long order) +{ + bool cached = ion_buffer_cached(buffer); + bool split_pages = ion_buffer_fault_user_mappings(buffer); + struct ion_page_pool *pool = heap->pools[order_to_index(order)]; + struct page *page; -static struct page_info *alloc_largest_available(unsigned long size, - bool split_pages, + if (!cached) + page = ion_page_pool_alloc(pool); + else + page = alloc_pages(GFP_HIGHUSER | __GFP_ZERO | + __GFP_NOWARN | __GFP_NORETRY, order); + if (!page) + return 0; + if (split_pages) + split_page(page, order); + return page; +} + +static void free_buffer_page(struct ion_system_heap *heap, + struct ion_buffer *buffer, struct page *page, + unsigned int order) +{ + bool cached = ion_buffer_cached(buffer); + bool split_pages = ion_buffer_fault_user_mappings(buffer); + int i; + + if (!cached) { + struct ion_page_pool *pool = heap->pools[order_to_index(order)]; + /* zero the pages before returning them to the pool for + security. This uses vmap as we want to set the pgprot so + the writes to occur to noncached mappings, as the pool's + purpose is to keep the pages out of the cache */ + for (i = 0; i < order / PAGE_SIZE; i++) { + struct page *sub_page = page + i; + void *addr = vmap(&sub_page, 1, VM_MAP, + pgprot_writecombine(PAGE_KERNEL)); + memset(addr, 0, PAGE_SIZE); + vunmap(addr); + } + ion_page_pool_free(pool, page); + } else if (split_pages) { + for (i = 0; i < (1 << order); i++) + __free_page(page + i); + } else { + __free_pages(page, order); + } +} + + +static struct page_info *alloc_largest_available(struct ion_system_heap *heap, + struct ion_buffer *buffer, + unsigned long size, unsigned int max_order) { struct page *page; struct page_info *info; int i; - for (i = 0; i < ARRAY_SIZE(orders); i++) { - if (size < (1 << orders[i]) * PAGE_SIZE) + for (i = 0; i < num_orders; i++) { + if (size < order_to_size(orders[i])) continue; if (max_order < orders[i]) continue; - page = alloc_pages(GFP_HIGHUSER | __GFP_ZERO | - __GFP_NOWARN | __GFP_NORETRY, orders[i]); + + page = alloc_buffer_page(heap, buffer, orders[i]); if (!page) continue; - if (split_pages) - split_page(page, orders[i]); - info = kmalloc(sizeof(struct page_info *), GFP_KERNEL); + + info = kmalloc(sizeof(struct page_info), GFP_KERNEL); info->page = page; info->order = orders[i]; return info; @@ -65,6 +138,9 @@ static int ion_system_heap_allocate(struct ion_heap *heap, unsigned long size, unsigned long align, unsigned long flags) { + struct ion_system_heap *sys_heap = container_of(heap, + struct ion_system_heap, + heap); struct sg_table *table; struct scatterlist *sg; int ret; @@ -72,15 +148,12 @@ static int ion_system_heap_allocate(struct ion_heap *heap, struct page_info *info, *tmp_info; int i = 0; long size_remaining = PAGE_ALIGN(size); - bool split_pages = ion_buffer_fault_user_mappings(buffer); - - unsigned int max_order = orders[0]; + bool split_pages = ion_buffer_fault_user_mappings(buffer); INIT_LIST_HEAD(&pages); while (size_remaining > 0) { - info = alloc_largest_available(size_remaining, split_pages, - max_order); + info = alloc_largest_available(sys_heap, buffer, size_remaining, max_order); if (!info) goto err; list_add_tail(&info->list, &pages); @@ -105,7 +178,6 @@ static int ion_system_heap_allocate(struct ion_heap *heap, sg = table->sgl; list_for_each_entry_safe(info, tmp_info, &pages, list) { struct page *page = info->page; - if (split_pages) { for (i = 0; i < (1 << info->order); i++) { sg_set_page(sg, page + i, PAGE_SIZE, 0); @@ -129,12 +201,7 @@ err1: kfree(table); err: list_for_each_entry(info, &pages, list) { - if (split_pages) - for (i = 0; i < (1 << info->order); i++) - __free_page(info->page + i); - else - __free_pages(info->page, info->order); - + free_buffer_page(sys_heap, buffer, info->page, info->order); kfree(info); } return -ENOMEM; @@ -142,15 +209,19 @@ err: void ion_system_heap_free(struct ion_buffer *buffer) { - int i; - struct scatterlist *sg; + struct ion_heap *heap = buffer->heap; + struct ion_system_heap *sys_heap = container_of(heap, + struct ion_system_heap, + heap); struct sg_table *table = buffer->priv_virt; + struct scatterlist *sg; + LIST_HEAD(pages); + int i; for_each_sg(table->sgl, sg, table->nents, i) - __free_pages(sg_page(sg), get_order(sg_dma_len(sg))); - if (buffer->sg_table) - sg_free_table(buffer->sg_table); - kfree(buffer->sg_table); + free_buffer_page(sys_heap, buffer, sg_page(sg), get_order(sg_dma_len(sg))); + sg_free_table(table); + kfree(table); } struct sg_table *ion_system_heap_map_dma(struct ion_heap *heap, @@ -228,7 +299,7 @@ int ion_system_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer, return 0; } -static struct ion_heap_ops vmalloc_ops = { +static struct ion_heap_ops system_heap_ops = { .allocate = ion_system_heap_allocate, .free = ion_system_heap_free, .map_dma = ion_system_heap_map_dma, @@ -238,21 +309,69 @@ static struct ion_heap_ops vmalloc_ops = { .map_user = ion_system_heap_map_user, }; +static int ion_system_heap_debug_show(struct ion_heap *heap, struct seq_file *s, + void *unused) +{ + + struct ion_system_heap *sys_heap = container_of(heap, + struct ion_system_heap, + heap); + int i; + for (i = 0; i < num_orders; i++) { + struct ion_page_pool *pool = sys_heap->pools[i]; + seq_printf(s, "%d order %u pages in pool = %lu total\n", + pool->count, pool->order, + (1 << pool->order) * PAGE_SIZE * pool->count); + } + return 0; +} + struct ion_heap *ion_system_heap_create(struct ion_platform_heap *unused) { - struct ion_heap *heap; + struct ion_system_heap *heap; + int i; - heap = kzalloc(sizeof(struct ion_heap), GFP_KERNEL); + heap = kzalloc(sizeof(struct ion_system_heap), GFP_KERNEL); if (!heap) return ERR_PTR(-ENOMEM); - heap->ops = &vmalloc_ops; - heap->type = ION_HEAP_TYPE_SYSTEM; - return heap; + heap->heap.ops = &system_heap_ops; + heap->heap.type = ION_HEAP_TYPE_SYSTEM; + heap->pools = kzalloc(sizeof(struct ion_page_pool *) * num_orders, + GFP_KERNEL); + if (!heap->pools) + goto err_alloc_pools; + for (i = 0; i < num_orders; i++) { + struct ion_page_pool *pool; + pool = ion_page_pool_create(GFP_HIGHUSER | __GFP_ZERO | + __GFP_NOWARN | __GFP_NORETRY, + orders[i]); + if (!pool) + goto err_create_pool; + heap->pools[i] = pool; + } + heap->heap.debug_show = ion_system_heap_debug_show; + return &heap->heap; +err_create_pool: + for (i = 0; i < num_orders; i++) + if (heap->pools[i]) + ion_page_pool_destroy(heap->pools[i]); + kfree(heap->pools); +err_alloc_pools: + kfree(heap); + return ERR_PTR(-ENOMEM); } void ion_system_heap_destroy(struct ion_heap *heap) { - kfree(heap); + struct ion_system_heap *sys_heap = container_of(heap, + struct ion_system_heap, + heap); + int i; + + for (i = 0; i < num_orders; i++) + ion_page_pool_destroy(sys_heap->pools[i]); + kfree(sys_heap->pools); + kfree(sys_heap); } static int ion_system_contig_heap_allocate(struct ion_heap *heap, -- 2.7.4