ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/gpu/drm/ttm/ttm_tt.c b/marvell/linux/drivers/gpu/drm/ttm/ttm_tt.c
new file mode 100644
index 0000000..c770ec7
--- /dev/null
+++ b/marvell/linux/drivers/gpu/drm/ttm/ttm_tt.c
@@ -0,0 +1,497 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ */
+
+#define pr_fmt(fmt) "[TTM] " fmt
+
+#include <linux/sched.h>
+#include <linux/pagemap.h>
+#include <linux/shmem_fs.h>
+#include <linux/file.h>
+#include <drm/drm_cache.h>
+#include <drm/ttm/ttm_bo_driver.h>
+#include <drm/ttm/ttm_page_alloc.h>
+#include <drm/ttm/ttm_set_memory.h>
+
+/**
+ * Allocates a ttm structure for the given BO.
+ */
+int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc)
+{
+ struct ttm_bo_device *bdev = bo->bdev;
+ uint32_t page_flags = 0;
+
+ dma_resv_assert_held(bo->base.resv);
+
+ if (bdev->need_dma32)
+ page_flags |= TTM_PAGE_FLAG_DMA32;
+
+ if (bdev->no_retry)
+ page_flags |= TTM_PAGE_FLAG_NO_RETRY;
+
+ switch (bo->type) {
+ case ttm_bo_type_device:
+ if (zero_alloc)
+ page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
+ break;
+ case ttm_bo_type_kernel:
+ break;
+ case ttm_bo_type_sg:
+ page_flags |= TTM_PAGE_FLAG_SG;
+ break;
+ default:
+ bo->ttm = NULL;
+ pr_err("Illegal buffer object type\n");
+ return -EINVAL;
+ }
+
+ bo->ttm = bdev->driver->ttm_tt_create(bo, page_flags);
+ if (unlikely(bo->ttm == NULL))
+ return -ENOMEM;
+
+ return 0;
+}
+
+/**
+ * Allocates storage for pointers to the pages that back the ttm.
+ */
+static int ttm_tt_alloc_page_directory(struct ttm_tt *ttm)
+{
+ ttm->pages = kvmalloc_array(ttm->num_pages, sizeof(void*),
+ GFP_KERNEL | __GFP_ZERO);
+ if (!ttm->pages)
+ return -ENOMEM;
+ return 0;
+}
+
+static int ttm_dma_tt_alloc_page_directory(struct ttm_dma_tt *ttm)
+{
+ ttm->ttm.pages = kvmalloc_array(ttm->ttm.num_pages,
+ sizeof(*ttm->ttm.pages) +
+ sizeof(*ttm->dma_address),
+ GFP_KERNEL | __GFP_ZERO);
+ if (!ttm->ttm.pages)
+ return -ENOMEM;
+ ttm->dma_address = (void *) (ttm->ttm.pages + ttm->ttm.num_pages);
+ return 0;
+}
+
+static int ttm_sg_tt_alloc_page_directory(struct ttm_dma_tt *ttm)
+{
+ ttm->dma_address = kvmalloc_array(ttm->ttm.num_pages,
+ sizeof(*ttm->dma_address),
+ GFP_KERNEL | __GFP_ZERO);
+ if (!ttm->dma_address)
+ return -ENOMEM;
+ return 0;
+}
+
+static int ttm_tt_set_page_caching(struct page *p,
+ enum ttm_caching_state c_old,
+ enum ttm_caching_state c_new)
+{
+ int ret = 0;
+
+ if (PageHighMem(p))
+ return 0;
+
+ if (c_old != tt_cached) {
+ /* p isn't in the default caching state, set it to
+ * writeback first to free its current memtype. */
+
+ ret = ttm_set_pages_wb(p, 1);
+ if (ret)
+ return ret;
+ }
+
+ if (c_new == tt_wc)
+ ret = ttm_set_pages_wc(p, 1);
+ else if (c_new == tt_uncached)
+ ret = ttm_set_pages_uc(p, 1);
+
+ return ret;
+}
+
+/*
+ * Change caching policy for the linear kernel map
+ * for range of pages in a ttm.
+ */
+
+static int ttm_tt_set_caching(struct ttm_tt *ttm,
+ enum ttm_caching_state c_state)
+{
+ int i, j;
+ struct page *cur_page;
+ int ret;
+
+ if (ttm->caching_state == c_state)
+ return 0;
+
+ if (ttm->state == tt_unpopulated) {
+ /* Change caching but don't populate */
+ ttm->caching_state = c_state;
+ return 0;
+ }
+
+ if (ttm->caching_state == tt_cached)
+ drm_clflush_pages(ttm->pages, ttm->num_pages);
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ cur_page = ttm->pages[i];
+ if (likely(cur_page != NULL)) {
+ ret = ttm_tt_set_page_caching(cur_page,
+ ttm->caching_state,
+ c_state);
+ if (unlikely(ret != 0))
+ goto out_err;
+ }
+ }
+
+ ttm->caching_state = c_state;
+
+ return 0;
+
+out_err:
+ for (j = 0; j < i; ++j) {
+ cur_page = ttm->pages[j];
+ if (likely(cur_page != NULL)) {
+ (void)ttm_tt_set_page_caching(cur_page, c_state,
+ ttm->caching_state);
+ }
+ }
+
+ return ret;
+}
+
+int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement)
+{
+ enum ttm_caching_state state;
+
+ if (placement & TTM_PL_FLAG_WC)
+ state = tt_wc;
+ else if (placement & TTM_PL_FLAG_UNCACHED)
+ state = tt_uncached;
+ else
+ state = tt_cached;
+
+ return ttm_tt_set_caching(ttm, state);
+}
+EXPORT_SYMBOL(ttm_tt_set_placement_caching);
+
+void ttm_tt_destroy(struct ttm_tt *ttm)
+{
+ if (ttm == NULL)
+ return;
+
+ ttm_tt_unbind(ttm);
+
+ if (ttm->state == tt_unbound)
+ ttm_tt_unpopulate(ttm);
+
+ if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP) &&
+ ttm->swap_storage)
+ fput(ttm->swap_storage);
+
+ ttm->swap_storage = NULL;
+ ttm->func->destroy(ttm);
+}
+
+void ttm_tt_init_fields(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
+ uint32_t page_flags)
+{
+ ttm->bdev = bo->bdev;
+ ttm->num_pages = bo->num_pages;
+ ttm->caching_state = tt_cached;
+ ttm->page_flags = page_flags;
+ ttm->state = tt_unpopulated;
+ ttm->swap_storage = NULL;
+ ttm->sg = bo->sg;
+}
+
+int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
+ uint32_t page_flags)
+{
+ ttm_tt_init_fields(ttm, bo, page_flags);
+
+ if (ttm_tt_alloc_page_directory(ttm)) {
+ pr_err("Failed allocating page table\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ttm_tt_init);
+
+void ttm_tt_fini(struct ttm_tt *ttm)
+{
+ kvfree(ttm->pages);
+ ttm->pages = NULL;
+}
+EXPORT_SYMBOL(ttm_tt_fini);
+
+int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_buffer_object *bo,
+ uint32_t page_flags)
+{
+ struct ttm_tt *ttm = &ttm_dma->ttm;
+
+ ttm_tt_init_fields(ttm, bo, page_flags);
+
+ INIT_LIST_HEAD(&ttm_dma->pages_list);
+ if (ttm_dma_tt_alloc_page_directory(ttm_dma)) {
+ pr_err("Failed allocating page table\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ttm_dma_tt_init);
+
+int ttm_sg_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_buffer_object *bo,
+ uint32_t page_flags)
+{
+ struct ttm_tt *ttm = &ttm_dma->ttm;
+ int ret;
+
+ ttm_tt_init_fields(ttm, bo, page_flags);
+
+ INIT_LIST_HEAD(&ttm_dma->pages_list);
+ if (page_flags & TTM_PAGE_FLAG_SG)
+ ret = ttm_sg_tt_alloc_page_directory(ttm_dma);
+ else
+ ret = ttm_dma_tt_alloc_page_directory(ttm_dma);
+ if (ret) {
+ pr_err("Failed allocating page table\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ttm_sg_tt_init);
+
+void ttm_dma_tt_fini(struct ttm_dma_tt *ttm_dma)
+{
+ struct ttm_tt *ttm = &ttm_dma->ttm;
+
+ if (ttm->pages)
+ kvfree(ttm->pages);
+ else
+ kvfree(ttm_dma->dma_address);
+ ttm->pages = NULL;
+ ttm_dma->dma_address = NULL;
+}
+EXPORT_SYMBOL(ttm_dma_tt_fini);
+
+void ttm_tt_unbind(struct ttm_tt *ttm)
+{
+ int ret;
+
+ if (ttm->state == tt_bound) {
+ ret = ttm->func->unbind(ttm);
+ BUG_ON(ret);
+ ttm->state = tt_unbound;
+ }
+}
+
+int ttm_tt_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem,
+ struct ttm_operation_ctx *ctx)
+{
+ int ret = 0;
+
+ if (!ttm)
+ return -EINVAL;
+
+ if (ttm->state == tt_bound)
+ return 0;
+
+ ret = ttm_tt_populate(ttm, ctx);
+ if (ret)
+ return ret;
+
+ ret = ttm->func->bind(ttm, bo_mem);
+ if (unlikely(ret != 0))
+ return ret;
+
+ ttm->state = tt_bound;
+
+ return 0;
+}
+EXPORT_SYMBOL(ttm_tt_bind);
+
+int ttm_tt_swapin(struct ttm_tt *ttm)
+{
+ struct address_space *swap_space;
+ struct file *swap_storage;
+ struct page *from_page;
+ struct page *to_page;
+ int i;
+ int ret = -ENOMEM;
+
+ swap_storage = ttm->swap_storage;
+ BUG_ON(swap_storage == NULL);
+
+ swap_space = swap_storage->f_mapping;
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ gfp_t gfp_mask = mapping_gfp_mask(swap_space);
+
+ gfp_mask |= (ttm->page_flags & TTM_PAGE_FLAG_NO_RETRY ? __GFP_RETRY_MAYFAIL : 0);
+ from_page = shmem_read_mapping_page_gfp(swap_space, i, gfp_mask);
+
+ if (IS_ERR(from_page)) {
+ ret = PTR_ERR(from_page);
+ goto out_err;
+ }
+ to_page = ttm->pages[i];
+ if (unlikely(to_page == NULL))
+ goto out_err;
+
+ copy_highpage(to_page, from_page);
+ put_page(from_page);
+ }
+
+ if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP))
+ fput(swap_storage);
+ ttm->swap_storage = NULL;
+ ttm->page_flags &= ~TTM_PAGE_FLAG_SWAPPED;
+
+ return 0;
+out_err:
+ return ret;
+}
+
+int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage)
+{
+ struct address_space *swap_space;
+ struct file *swap_storage;
+ struct page *from_page;
+ struct page *to_page;
+ int i;
+ int ret = -ENOMEM;
+
+ BUG_ON(ttm->state != tt_unbound && ttm->state != tt_unpopulated);
+ BUG_ON(ttm->caching_state != tt_cached);
+
+ if (!persistent_swap_storage) {
+ swap_storage = shmem_file_setup("ttm swap",
+ ttm->num_pages << PAGE_SHIFT,
+ 0);
+ if (IS_ERR(swap_storage)) {
+ pr_err("Failed allocating swap storage\n");
+ return PTR_ERR(swap_storage);
+ }
+ } else {
+ swap_storage = persistent_swap_storage;
+ }
+
+ swap_space = swap_storage->f_mapping;
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ gfp_t gfp_mask = mapping_gfp_mask(swap_space);
+
+ gfp_mask |= (ttm->page_flags & TTM_PAGE_FLAG_NO_RETRY ? __GFP_RETRY_MAYFAIL : 0);
+
+ from_page = ttm->pages[i];
+ if (unlikely(from_page == NULL))
+ continue;
+
+ to_page = shmem_read_mapping_page_gfp(swap_space, i, gfp_mask);
+ if (IS_ERR(to_page)) {
+ ret = PTR_ERR(to_page);
+ goto out_err;
+ }
+ copy_highpage(to_page, from_page);
+ set_page_dirty(to_page);
+ mark_page_accessed(to_page);
+ put_page(to_page);
+ }
+
+ ttm_tt_unpopulate(ttm);
+ ttm->swap_storage = swap_storage;
+ ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
+ if (persistent_swap_storage)
+ ttm->page_flags |= TTM_PAGE_FLAG_PERSISTENT_SWAP;
+
+ return 0;
+out_err:
+ if (!persistent_swap_storage)
+ fput(swap_storage);
+
+ return ret;
+}
+
+static void ttm_tt_add_mapping(struct ttm_tt *ttm)
+{
+ pgoff_t i;
+
+ if (ttm->page_flags & TTM_PAGE_FLAG_SG)
+ return;
+
+ for (i = 0; i < ttm->num_pages; ++i)
+ ttm->pages[i]->mapping = ttm->bdev->dev_mapping;
+}
+
+int ttm_tt_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
+{
+ int ret;
+
+ if (ttm->state != tt_unpopulated)
+ return 0;
+
+ if (ttm->bdev->driver->ttm_tt_populate)
+ ret = ttm->bdev->driver->ttm_tt_populate(ttm, ctx);
+ else
+ ret = ttm_pool_populate(ttm, ctx);
+ if (!ret)
+ ttm_tt_add_mapping(ttm);
+ return ret;
+}
+
+static void ttm_tt_clear_mapping(struct ttm_tt *ttm)
+{
+ pgoff_t i;
+ struct page **page = ttm->pages;
+
+ if (ttm->page_flags & TTM_PAGE_FLAG_SG)
+ return;
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ (*page)->mapping = NULL;
+ (*page++)->index = 0;
+ }
+}
+
+void ttm_tt_unpopulate(struct ttm_tt *ttm)
+{
+ if (ttm->state == tt_unpopulated)
+ return;
+
+ ttm_tt_clear_mapping(ttm);
+ if (ttm->bdev->driver->ttm_tt_unpopulate)
+ ttm->bdev->driver->ttm_tt_unpopulate(ttm);
+ else
+ ttm_pool_unpopulate(ttm);
+}