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ion: reorder pages for scatterlist

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Change-Id: I3a25eba9d65ac1345471321f61ae9d7a959a1be6
Signed-off-by: Simon Xue <xxm@rock-chips.com>
This commit is contained in:
Simon Xue
2021-06-21 10:23:30 +08:00
committed by Tao Huang
parent e4ff4df380
commit f1c8124be2
1 changed files with 55 additions and 1 deletions
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56
drivers/staging/android/ion/heaps/ion_system_heap.c
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@@ -111,21 +111,48 @@ static int ion_system_heap_allocate(struct ion_heap *heap,
int i = 0;
unsigned long size_remaining = PAGE_ALIGN(size);
unsigned int max_order = orders[0];
struct list_head lists[8];
unsigned int block_index[8] = {0};
unsigned int block_1M = 0;
unsigned int block_64K = 0;
unsigned int maximum;
int j;
if (size / PAGE_SIZE > totalram_pages() / 2)
return -ENOMEM;
INIT_LIST_HEAD(&pages);
for (i = 0; i < 8; i++)
INIT_LIST_HEAD(&lists[i]);
i = 0;
while (size_remaining > 0) {
page = alloc_largest_available(sys_heap, buffer, size_remaining,
max_order);
if (!page)
goto free_pages;
list_add_tail(&page->lru, &pages);
size_remaining -= page_size(page);
max_order = compound_order(page);
if (max_order) {
if (max_order == 8)
block_1M++;
if (max_order == 4)
block_64K++;
list_add_tail(&page->lru, &pages);
} else {
dma_addr_t phys = page_to_phys(page);
unsigned int bit12_14 = (phys >> 12) & 0x7;
list_add_tail(&page->lru, &lists[bit12_14]);
block_index[bit12_14]++;
}
i++;
}
pr_debug("%s, %d, i = %d, size = %ld\n", __func__, __LINE__, i, size);
table = kmalloc(sizeof(*table), GFP_KERNEL);
if (!table)
goto free_pages;
@@ -133,6 +160,16 @@ static int ion_system_heap_allocate(struct ion_heap *heap,
if (sg_alloc_table(table, i, GFP_KERNEL))
goto free_table;
maximum = block_index[0];
for (i = 1; i < 8; i++)
maximum = max(maximum, block_index[i]);
pr_debug("%s, %d, maximum = %d, block_1M = %d, block_64K = %d\n",
__func__, __LINE__, maximum, block_1M, block_64K);
for (i = 0; i < 8; i++)
pr_debug("block_index[%d] = %d\n", i, block_index[i]);
sg = table->sgl;
list_for_each_entry_safe(page, tmp_page, &pages, lru) {
sg_set_page(sg, page, page_size(page), 0);
@@ -140,6 +177,18 @@ static int ion_system_heap_allocate(struct ion_heap *heap,
list_del(&page->lru);
}
for (i = 0; i < maximum; i++) {
for (j = 0; j < 8; j++) {
if (!list_empty(&lists[j])) {
page = list_first_entry(&lists[j], struct page,
lru);
sg_set_page(sg, page, PAGE_SIZE, 0);
sg = sg_next(sg);
list_del(&page->lru);
}
}
}
buffer->sg_table = table;
ion_buffer_prep_noncached(buffer);
@@ -151,6 +200,11 @@ free_table:
free_pages:
list_for_each_entry_safe(page, tmp_page, &pages, lru)
free_buffer_page(sys_heap, buffer, page);
for (i = 0; i < 8; i++) {
list_for_each_entry_safe(page, tmp_page, &lists[i], lru)
free_buffer_page(sys_heap, buffer, page);
}
return -ENOMEM;
}