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ANDROID: dma-buf: system_heap: support to allocate pages with GFP_DMA32

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Add add heap - "system-dma32" to allocate pages with GFP_DMA32, support cache,
and add heap - "system-uncached-dma32" to allocate pages with GFP_DMA32, but
unsupport cache

Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
Change-Id: I93bb7c17fc038f52940ddc4facf836637c917bea
This commit is contained in:
Jianqun Xu
2021-11-09 18:12:23 +08:00
parent 595d953df0
commit 8880c05e5a
1 changed files with 41 additions and 0 deletions
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41
drivers/dma-buf/heaps/system_heap.c
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@@ -28,7 +28,9 @@
#define CONFIG_SYSTEM_HEAP_FORCE_DMA_SYNC
static struct dma_heap *sys_heap;
static struct dma_heap *sys_dma32_heap;
static struct dma_heap *sys_uncached_heap;
static struct dma_heap *sys_uncached_dma32_heap;
struct system_heap_buffer {
struct dma_heap *heap;
@@ -66,6 +68,7 @@ static gfp_t order_flags[] = {HIGH_ORDER_GFP, LOW_ORDER_GFP, LOW_ORDER_GFP};
static unsigned int orders[] = {8, 4, 0};
#define NUM_ORDERS ARRAY_SIZE(orders)
struct dmabuf_page_pool *pools[NUM_ORDERS];
struct dmabuf_page_pool *dma32_pools[NUM_ORDERS];
static struct sg_table *dup_sg_table(struct sg_table *table)
{
@@ -682,8 +685,11 @@ static long system_get_pool_size(struct dma_heap *heap)
int i;
long num_pages = 0;
struct dmabuf_page_pool **pool;
const char *name = dma_heap_get_name(heap);
pool = pools;
if (!strcmp(name, "system-dma32") || !strcmp(name, "system-uncached-dma32"))
pool = dma32_pools;
for (i = 0; i < NUM_ORDERS; i++, pool++) {
num_pages += ((*pool)->count[POOL_LOWPAGE] +
(*pool)->count[POOL_HIGHPAGE]) << (*pool)->order;
@@ -761,6 +767,19 @@ static int system_heap_create(void)
}
}
for (i = 0; i < NUM_ORDERS; i++) {
dma32_pools[i] = dmabuf_page_pool_create(order_flags[i] | GFP_DMA32, orders[i]);
if (!dma32_pools[i]) {
int j;
pr_err("%s: page dma32 pool creation failed!\n", __func__);
for (j = 0; j < i; j++)
dmabuf_page_pool_destroy(dma32_pools[j]);
goto err_dma32_pool;
}
}
exp_info.name = "system";
exp_info.ops = &system_heap_ops;
exp_info.priv = NULL;
@@ -769,6 +788,14 @@ static int system_heap_create(void)
if (IS_ERR(sys_heap))
return PTR_ERR(sys_heap);
exp_info.name = "system-dma32";
exp_info.ops = &system_heap_ops;
exp_info.priv = NULL;
sys_dma32_heap = dma_heap_add(&exp_info);
if (IS_ERR(sys_dma32_heap))
return PTR_ERR(sys_dma32_heap);
exp_info.name = "system-uncached";
exp_info.ops = &system_uncached_heap_ops;
exp_info.priv = NULL;
@@ -777,11 +804,25 @@ static int system_heap_create(void)
if (IS_ERR(sys_uncached_heap))
return PTR_ERR(sys_uncached_heap);
exp_info.name = "system-uncached-dma32";
exp_info.ops = &system_uncached_heap_ops;
exp_info.priv = NULL;
sys_uncached_dma32_heap = dma_heap_add(&exp_info);
if (IS_ERR(sys_uncached_dma32_heap))
return PTR_ERR(sys_uncached_dma32_heap);
dma_coerce_mask_and_coherent(dma_heap_get_dev(sys_uncached_heap), DMA_BIT_MASK(64));
dma_coerce_mask_and_coherent(dma_heap_get_dev(sys_uncached_dma32_heap), DMA_BIT_MASK(32));
mb(); /* make sure we only set allocate after dma_mask is set */
system_uncached_heap_ops.allocate = system_uncached_heap_allocate;
return 0;
err_dma32_pool:
for (i = 0; i < NUM_ORDERS; i++)
dmabuf_page_pool_destroy(pools[i]);
return -ENOMEM;
}
module_init(system_heap_create);
MODULE_LICENSE("GPL v2");