gpu: ion: Add dedicated heap for memblock_removed memory
Going forward, the carveout heap will be relying on having
properly populated struct pages. Using memblock_remove does
not populate the page structures correctly. Add a dedicated
heap for dealing with memblock_removed memory and remove
extra features from the carveout heap to deal with outside
memory.
Change-Id: Ibfe44d2ca27316d164892be885eb2464946bf608
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
diff --git a/drivers/gpu/ion/ion_removed_heap.c b/drivers/gpu/ion/ion_removed_heap.c
new file mode 100644
index 0000000..4759e40
--- /dev/null
+++ b/drivers/gpu/ion/ion_removed_heap.c
@@ -0,0 +1,441 @@
+/*
+ * drivers/gpu/ion/ion_removed_heap.c
+ *
+ * Copyright (C) 2011 Google, Inc.
+ * Copyright (c) 2011-2013, The Linux Foundation. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+#include <linux/spinlock.h>
+
+#include <linux/err.h>
+#include <linux/genalloc.h>
+#include <linux/io.h>
+#include <linux/ion.h>
+#include <linux/mm.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/seq_file.h>
+#include "ion_priv.h"
+
+#include <asm/mach/map.h>
+#include <asm/cacheflush.h>
+#include <linux/msm_ion.h>
+
+struct ion_removed_heap {
+ struct ion_heap heap;
+ struct gen_pool *pool;
+ ion_phys_addr_t base;
+ unsigned long allocated_bytes;
+ unsigned long total_size;
+ int (*request_region)(void *);
+ int (*release_region)(void *);
+ atomic_t map_count;
+ void *bus_id;
+ unsigned int has_outer_cache;
+};
+
+ion_phys_addr_t ion_removed_allocate(struct ion_heap *heap,
+ unsigned long size,
+ unsigned long align)
+{
+ struct ion_removed_heap *removed_heap =
+ container_of(heap, struct ion_removed_heap, heap);
+ unsigned long offset = gen_pool_alloc_aligned(removed_heap->pool,
+ size, ilog2(align));
+
+ if (!offset) {
+ if ((removed_heap->total_size -
+ removed_heap->allocated_bytes) >= size)
+ pr_debug("%s: heap %s has enough memory (%lx) but the allocation of size %lx still failed. Memory is probably fragmented.",
+ __func__, heap->name,
+ removed_heap->total_size -
+ removed_heap->allocated_bytes, size);
+ return ION_CARVEOUT_ALLOCATE_FAIL;
+ }
+
+ removed_heap->allocated_bytes += size;
+ return offset;
+}
+
+void ion_removed_free(struct ion_heap *heap, ion_phys_addr_t addr,
+ unsigned long size)
+{
+ struct ion_removed_heap *removed_heap =
+ container_of(heap, struct ion_removed_heap, heap);
+
+ if (addr == ION_CARVEOUT_ALLOCATE_FAIL)
+ return;
+ gen_pool_free(removed_heap->pool, addr, size);
+ removed_heap->allocated_bytes -= size;
+}
+
+static int ion_removed_heap_phys(struct ion_heap *heap,
+ struct ion_buffer *buffer,
+ ion_phys_addr_t *addr, size_t *len)
+{
+ *addr = buffer->priv_phys;
+ *len = buffer->size;
+ return 0;
+}
+
+static int ion_removed_heap_allocate(struct ion_heap *heap,
+ struct ion_buffer *buffer,
+ unsigned long size, unsigned long align,
+ unsigned long flags)
+{
+ buffer->priv_phys = ion_removed_allocate(heap, size, align);
+ return buffer->priv_phys == ION_CARVEOUT_ALLOCATE_FAIL ? -ENOMEM : 0;
+}
+
+static void ion_removed_heap_free(struct ion_buffer *buffer)
+{
+ struct ion_heap *heap = buffer->heap;
+
+ ion_removed_free(heap, buffer->priv_phys, buffer->size);
+ buffer->priv_phys = ION_CARVEOUT_ALLOCATE_FAIL;
+}
+
+struct sg_table *ion_removed_heap_map_dma(struct ion_heap *heap,
+ struct ion_buffer *buffer)
+{
+ struct sg_table *table;
+ int ret;
+
+ table = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
+ if (!table)
+ return ERR_PTR(-ENOMEM);
+
+ ret = sg_alloc_table(table, 1, GFP_KERNEL);
+ if (ret)
+ goto err0;
+
+ table->sgl->length = buffer->size;
+ table->sgl->offset = 0;
+ table->sgl->dma_address = buffer->priv_phys;
+
+ return table;
+
+err0:
+ kfree(table);
+ return ERR_PTR(ret);
+}
+
+void ion_removed_heap_unmap_dma(struct ion_heap *heap,
+ struct ion_buffer *buffer)
+{
+ if (buffer->sg_table)
+ sg_free_table(buffer->sg_table);
+ kfree(buffer->sg_table);
+ buffer->sg_table = 0;
+}
+
+static int ion_removed_request_region(struct ion_removed_heap *removed_heap)
+{
+ int ret_value = 0;
+ if (atomic_inc_return(&removed_heap->map_count) == 1) {
+ if (removed_heap->request_region) {
+ ret_value = removed_heap->request_region(
+ removed_heap->bus_id);
+ if (ret_value) {
+ pr_err("Unable to request SMI region");
+ atomic_dec(&removed_heap->map_count);
+ }
+ }
+ }
+ return ret_value;
+}
+
+static int ion_removed_release_region(struct ion_removed_heap *removed_heap)
+{
+ int ret_value = 0;
+ if (atomic_dec_and_test(&removed_heap->map_count)) {
+ if (removed_heap->release_region) {
+ ret_value = removed_heap->release_region(
+ removed_heap->bus_id);
+ if (ret_value)
+ pr_err("Unable to release SMI region");
+ }
+ }
+ return ret_value;
+}
+
+void *ion_removed_heap_map_kernel(struct ion_heap *heap,
+ struct ion_buffer *buffer)
+{
+ struct ion_removed_heap *removed_heap =
+ container_of(heap, struct ion_removed_heap, heap);
+ void *ret_value;
+
+ if (ion_removed_request_region(removed_heap))
+ return NULL;
+
+ if (ION_IS_CACHED(buffer->flags))
+ ret_value = ioremap_cached(buffer->priv_phys, buffer->size);
+ else
+ ret_value = ioremap(buffer->priv_phys, buffer->size);
+
+ if (!ret_value)
+ ion_removed_release_region(removed_heap);
+ return ret_value;
+}
+
+void ion_removed_heap_unmap_kernel(struct ion_heap *heap,
+ struct ion_buffer *buffer)
+{
+ struct ion_removed_heap *removed_heap =
+ container_of(heap, struct ion_removed_heap, heap);
+
+ __arm_iounmap(buffer->vaddr);
+ buffer->vaddr = NULL;
+
+ ion_removed_release_region(removed_heap);
+ return;
+}
+
+int ion_removed_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer,
+ struct vm_area_struct *vma)
+{
+ struct ion_removed_heap *removed_heap =
+ container_of(heap, struct ion_removed_heap, heap);
+ int ret_value = 0;
+
+ if (ion_removed_request_region(removed_heap))
+ return -EINVAL;
+
+ if (!ION_IS_CACHED(buffer->flags))
+ vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+
+ ret_value = remap_pfn_range(vma, vma->vm_start,
+ __phys_to_pfn(buffer->priv_phys) + vma->vm_pgoff,
+ vma->vm_end - vma->vm_start,
+ vma->vm_page_prot);
+
+ if (ret_value)
+ ion_removed_release_region(removed_heap);
+ return ret_value;
+}
+
+void ion_removed_heap_unmap_user(struct ion_heap *heap,
+ struct ion_buffer *buffer)
+{
+ struct ion_removed_heap *removed_heap =
+ container_of(heap, struct ion_removed_heap, heap);
+ ion_removed_release_region(removed_heap);
+}
+
+int ion_removed_cache_ops(struct ion_heap *heap, struct ion_buffer *buffer,
+ void *vaddr, unsigned int offset, unsigned int length,
+ unsigned int cmd)
+{
+ void (*outer_cache_op)(phys_addr_t, phys_addr_t) = NULL;
+ struct ion_removed_heap *removed_heap =
+ container_of(heap, struct ion_removed_heap, heap);
+ unsigned int size_to_vmap, total_size;
+ int i, j;
+ void *ptr = NULL;
+ ion_phys_addr_t buff_phys = buffer->priv_phys;
+
+ if (!vaddr) {
+ /*
+ * Split the vmalloc space into smaller regions in
+ * order to clean and/or invalidate the cache.
+ */
+ size_to_vmap = ((VMALLOC_END - VMALLOC_START)/8);
+ total_size = buffer->size;
+
+ for (i = 0; i < total_size; i += size_to_vmap) {
+ size_to_vmap = min(size_to_vmap, total_size - i);
+ for (j = 0; j < 10 && size_to_vmap; ++j) {
+ ptr = ioremap(buff_phys, size_to_vmap);
+ if (ptr) {
+ switch (cmd) {
+ case ION_IOC_CLEAN_CACHES:
+ dmac_clean_range(ptr,
+ ptr + size_to_vmap);
+ outer_cache_op =
+ outer_clean_range;
+ break;
+ case ION_IOC_INV_CACHES:
+ dmac_inv_range(ptr,
+ ptr + size_to_vmap);
+ outer_cache_op =
+ outer_inv_range;
+ break;
+ case ION_IOC_CLEAN_INV_CACHES:
+ dmac_flush_range(ptr,
+ ptr + size_to_vmap);
+ outer_cache_op =
+ outer_flush_range;
+ break;
+ default:
+ return -EINVAL;
+ }
+ buff_phys += size_to_vmap;
+ break;
+ } else {
+ size_to_vmap >>= 1;
+ }
+ }
+ if (!ptr) {
+ pr_err("Couldn't io-remap the memory\n");
+ return -EINVAL;
+ }
+ iounmap(ptr);
+ }
+ } else {
+ switch (cmd) {
+ case ION_IOC_CLEAN_CACHES:
+ dmac_clean_range(vaddr, vaddr + length);
+ outer_cache_op = outer_clean_range;
+ break;
+ case ION_IOC_INV_CACHES:
+ dmac_inv_range(vaddr, vaddr + length);
+ outer_cache_op = outer_inv_range;
+ break;
+ case ION_IOC_CLEAN_INV_CACHES:
+ dmac_flush_range(vaddr, vaddr + length);
+ outer_cache_op = outer_flush_range;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ if (removed_heap->has_outer_cache) {
+ unsigned long pstart = buffer->priv_phys + offset;
+ outer_cache_op(pstart, pstart + length);
+ }
+ return 0;
+}
+
+static int ion_removed_print_debug(struct ion_heap *heap, struct seq_file *s,
+ const struct rb_root *mem_map)
+{
+ struct ion_removed_heap *removed_heap =
+ container_of(heap, struct ion_removed_heap, heap);
+
+ seq_printf(s, "total bytes currently allocated: %lx\n",
+ removed_heap->allocated_bytes);
+ seq_printf(s, "total heap size: %lx\n", removed_heap->total_size);
+
+ if (mem_map) {
+ unsigned long base = removed_heap->base;
+ unsigned long size = removed_heap->total_size;
+ unsigned long end = base+size;
+ unsigned long last_end = base;
+ struct rb_node *n;
+
+ seq_printf(s, "\nMemory Map\n");
+ seq_printf(s, "%16.s %14.s %14.s %14.s\n",
+ "client", "start address", "end address",
+ "size (hex)");
+
+ for (n = rb_first(mem_map); n; n = rb_next(n)) {
+ struct mem_map_data *data =
+ rb_entry(n, struct mem_map_data, node);
+ const char *client_name = "(null)";
+
+ if (last_end < data->addr) {
+ phys_addr_t da;
+
+ da = data->addr-1;
+ seq_printf(s, "%16.s %14pa %14pa %14lu (%lx)\n",
+ "FREE", &last_end, &da,
+ data->addr-last_end,
+ data->addr-last_end);
+ }
+
+ if (data->client_name)
+ client_name = data->client_name;
+
+ seq_printf(s, "%16.s %14pa %14pa %14lu (%lx)\n",
+ client_name, &data->addr,
+ &data->addr_end,
+ data->size, data->size);
+ last_end = data->addr_end+1;
+ }
+ if (last_end < end) {
+ seq_printf(s, "%16.s %14lx %14lx %14lu (%lx)\n", "FREE",
+ last_end, end-1, end-last_end, end-last_end);
+ }
+ }
+ return 0;
+}
+
+static struct ion_heap_ops removed_heap_ops = {
+ .allocate = ion_removed_heap_allocate,
+ .free = ion_removed_heap_free,
+ .phys = ion_removed_heap_phys,
+ .map_user = ion_removed_heap_map_user,
+ .map_kernel = ion_removed_heap_map_kernel,
+ .unmap_user = ion_removed_heap_unmap_user,
+ .unmap_kernel = ion_removed_heap_unmap_kernel,
+ .map_dma = ion_removed_heap_map_dma,
+ .unmap_dma = ion_removed_heap_unmap_dma,
+ .cache_op = ion_removed_cache_ops,
+ .print_debug = ion_removed_print_debug,
+};
+
+struct ion_heap *ion_removed_heap_create(struct ion_platform_heap *heap_data)
+{
+ struct ion_removed_heap *removed_heap;
+ int ret;
+
+ removed_heap = kzalloc(sizeof(struct ion_removed_heap), GFP_KERNEL);
+ if (!removed_heap)
+ return ERR_PTR(-ENOMEM);
+
+ removed_heap->pool = gen_pool_create(12, -1);
+ if (!removed_heap->pool) {
+ kfree(removed_heap);
+ return ERR_PTR(-ENOMEM);
+ }
+ removed_heap->base = heap_data->base;
+ ret = gen_pool_add(removed_heap->pool, removed_heap->base,
+ heap_data->size, -1);
+ if (ret < 0) {
+ gen_pool_destroy(removed_heap->pool);
+ kfree(removed_heap);
+ return ERR_PTR(-EINVAL);
+ }
+ removed_heap->heap.ops = &removed_heap_ops;
+ removed_heap->heap.type = ION_HEAP_TYPE_REMOVED;
+ removed_heap->allocated_bytes = 0;
+ removed_heap->total_size = heap_data->size;
+ removed_heap->has_outer_cache = heap_data->has_outer_cache;
+
+ if (heap_data->extra_data) {
+ struct ion_co_heap_pdata *extra_data =
+ heap_data->extra_data;
+
+ if (extra_data->setup_region)
+ removed_heap->bus_id = extra_data->setup_region();
+ if (extra_data->request_region)
+ removed_heap->request_region =
+ extra_data->request_region;
+ if (extra_data->release_region)
+ removed_heap->release_region =
+ extra_data->release_region;
+ }
+ return &removed_heap->heap;
+}
+
+void ion_removed_heap_destroy(struct ion_heap *heap)
+{
+ struct ion_removed_heap *removed_heap =
+ container_of(heap, struct ion_removed_heap, heap);
+
+ gen_pool_destroy(removed_heap->pool);
+ kfree(removed_heap);
+ removed_heap = NULL;
+}