Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 612 insertions, 0 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
new file mode 100644
index 0000000000..af8562c95c
--- /dev/null
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
@@ -0,0 +1,612 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/**************************************************************************
+ *
+ * Copyright 2009-2023 VMware, Inc., Palo Alto, CA., USA
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+#include "vmwgfx_bo.h"
+#include "vmwgfx_drv.h"
+#include <drm/ttm/ttm_placement.h>
+
+static const struct ttm_place vram_placement_flags = {
+	.fpfn = 0,
+	.lpfn = 0,
+	.mem_type = TTM_PL_VRAM,
+	.flags = 0
+};
+
+static const struct ttm_place sys_placement_flags = {
+	.fpfn = 0,
+	.lpfn = 0,
+	.mem_type = TTM_PL_SYSTEM,
+	.flags = 0
+};
+
+static const struct ttm_place gmr_placement_flags = {
+	.fpfn = 0,
+	.lpfn = 0,
+	.mem_type = VMW_PL_GMR,
+	.flags = 0
+};
+
+struct ttm_placement vmw_vram_placement = {
+	.num_placement = 1,
+	.placement = &vram_placement_flags,
+	.num_busy_placement = 1,
+	.busy_placement = &vram_placement_flags
+};
+
+static const struct ttm_place vram_gmr_placement_flags[] = {
+	{
+		.fpfn = 0,
+		.lpfn = 0,
+		.mem_type = TTM_PL_VRAM,
+		.flags = 0
+	}, {
+		.fpfn = 0,
+		.lpfn = 0,
+		.mem_type = VMW_PL_GMR,
+		.flags = 0
+	}
+};
+
+struct ttm_placement vmw_vram_gmr_placement = {
+	.num_placement = 2,
+	.placement = vram_gmr_placement_flags,
+	.num_busy_placement = 1,
+	.busy_placement = &gmr_placement_flags
+};
+
+struct ttm_placement vmw_sys_placement = {
+	.num_placement = 1,
+	.placement = &sys_placement_flags,
+	.num_busy_placement = 1,
+	.busy_placement = &sys_placement_flags
+};
+
+const size_t vmw_tt_size = sizeof(struct vmw_ttm_tt);
+
+/**
+ * __vmw_piter_non_sg_next: Helper functions to advance
+ * a struct vmw_piter iterator.
+ *
+ * @viter: Pointer to the iterator.
+ *
+ * These functions return false if past the end of the list,
+ * true otherwise. Functions are selected depending on the current
+ * DMA mapping mode.
+ */
+static bool __vmw_piter_non_sg_next(struct vmw_piter *viter)
+{
+	return ++(viter->i) < viter->num_pages;
+}
+
+static bool __vmw_piter_sg_next(struct vmw_piter *viter)
+{
+	bool ret = __vmw_piter_non_sg_next(viter);
+
+	return __sg_page_iter_dma_next(&viter->iter) && ret;
+}
+
+
+static dma_addr_t __vmw_piter_dma_addr(struct vmw_piter *viter)
+{
+	return viter->addrs[viter->i];
+}
+
+static dma_addr_t __vmw_piter_sg_addr(struct vmw_piter *viter)
+{
+	return sg_page_iter_dma_address(&viter->iter);
+}
+
+
+/**
+ * vmw_piter_start - Initialize a struct vmw_piter.
+ *
+ * @viter: Pointer to the iterator to initialize
+ * @vsgt: Pointer to a struct vmw_sg_table to initialize from
+ * @p_offset: Pointer offset used to update current array position
+ *
+ * Note that we're following the convention of __sg_page_iter_start, so that
+ * the iterator doesn't point to a valid page after initialization; it has
+ * to be advanced one step first.
+ */
+void vmw_piter_start(struct vmw_piter *viter, const struct vmw_sg_table *vsgt,
+		     unsigned long p_offset)
+{
+	viter->i = p_offset - 1;
+	viter->num_pages = vsgt->num_pages;
+	viter->pages = vsgt->pages;
+	switch (vsgt->mode) {
+	case vmw_dma_alloc_coherent:
+		viter->next = &__vmw_piter_non_sg_next;
+		viter->dma_address = &__vmw_piter_dma_addr;
+		viter->addrs = vsgt->addrs;
+		break;
+	case vmw_dma_map_populate:
+	case vmw_dma_map_bind:
+		viter->next = &__vmw_piter_sg_next;
+		viter->dma_address = &__vmw_piter_sg_addr;
+		__sg_page_iter_start(&viter->iter.base, vsgt->sgt->sgl,
+				     vsgt->sgt->orig_nents, p_offset);
+		break;
+	default:
+		BUG();
+	}
+}
+
+/**
+ * vmw_ttm_unmap_from_dma - unmap  device addresses previsouly mapped for
+ * TTM pages
+ *
+ * @vmw_tt: Pointer to a struct vmw_ttm_backend
+ *
+ * Used to free dma mappings previously mapped by vmw_ttm_map_for_dma.
+ */
+static void vmw_ttm_unmap_from_dma(struct vmw_ttm_tt *vmw_tt)
+{
+	struct device *dev = vmw_tt->dev_priv->drm.dev;
+
+	dma_unmap_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
+	vmw_tt->sgt.nents = vmw_tt->sgt.orig_nents;
+}
+
+/**
+ * vmw_ttm_map_for_dma - map TTM pages to get device addresses
+ *
+ * @vmw_tt: Pointer to a struct vmw_ttm_backend
+ *
+ * This function is used to get device addresses from the kernel DMA layer.
+ * However, it's violating the DMA API in that when this operation has been
+ * performed, it's illegal for the CPU to write to the pages without first
+ * unmapping the DMA mappings, or calling dma_sync_sg_for_cpu(). It is
+ * therefore only legal to call this function if we know that the function
+ * dma_sync_sg_for_cpu() is a NOP, and dma_sync_sg_for_device() is at most
+ * a CPU write buffer flush.
+ */
+static int vmw_ttm_map_for_dma(struct vmw_ttm_tt *vmw_tt)
+{
+	struct device *dev = vmw_tt->dev_priv->drm.dev;
+
+	return dma_map_sgtable(dev, &vmw_tt->sgt, DMA_BIDIRECTIONAL, 0);
+}
+
+/**
+ * vmw_ttm_map_dma - Make sure TTM pages are visible to the device
+ *
+ * @vmw_tt: Pointer to a struct vmw_ttm_tt
+ *
+ * Select the correct function for and make sure the TTM pages are
+ * visible to the device. Allocate storage for the device mappings.
+ * If a mapping has already been performed, indicated by the storage
+ * pointer being non NULL, the function returns success.
+ */
+static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt)
+{
+	struct vmw_private *dev_priv = vmw_tt->dev_priv;
+	struct vmw_sg_table *vsgt = &vmw_tt->vsgt;
+	int ret = 0;
+
+	if (vmw_tt->mapped)
+		return 0;
+
+	vsgt->mode = dev_priv->map_mode;
+	vsgt->pages = vmw_tt->dma_ttm.pages;
+	vsgt->num_pages = vmw_tt->dma_ttm.num_pages;
+	vsgt->addrs = vmw_tt->dma_ttm.dma_address;
+	vsgt->sgt = NULL;
+
+	switch (dev_priv->map_mode) {
+	case vmw_dma_map_bind:
+	case vmw_dma_map_populate:
+		vsgt->sgt = &vmw_tt->sgt;
+		ret = sg_alloc_table_from_pages_segment(
+			&vmw_tt->sgt, vsgt->pages, vsgt->num_pages, 0,
+			(unsigned long)vsgt->num_pages << PAGE_SHIFT,
+			dma_get_max_seg_size(dev_priv->drm.dev), GFP_KERNEL);
+		if (ret)
+			goto out_sg_alloc_fail;
+
+		ret = vmw_ttm_map_for_dma(vmw_tt);
+		if (unlikely(ret != 0))
+			goto out_map_fail;
+
+		break;
+	default:
+		break;
+	}
+
+	vmw_tt->mapped = true;
+	return 0;
+
+out_map_fail:
+	sg_free_table(vmw_tt->vsgt.sgt);
+	vmw_tt->vsgt.sgt = NULL;
+out_sg_alloc_fail:
+	return ret;
+}
+
+/**
+ * vmw_ttm_unmap_dma - Tear down any TTM page device mappings
+ *
+ * @vmw_tt: Pointer to a struct vmw_ttm_tt
+ *
+ * Tear down any previously set up device DMA mappings and free
+ * any storage space allocated for them. If there are no mappings set up,
+ * this function is a NOP.
+ */
+static void vmw_ttm_unmap_dma(struct vmw_ttm_tt *vmw_tt)
+{
+	struct vmw_private *dev_priv = vmw_tt->dev_priv;
+
+	if (!vmw_tt->vsgt.sgt)
+		return;
+
+	switch (dev_priv->map_mode) {
+	case vmw_dma_map_bind:
+	case vmw_dma_map_populate:
+		vmw_ttm_unmap_from_dma(vmw_tt);
+		sg_free_table(vmw_tt->vsgt.sgt);
+		vmw_tt->vsgt.sgt = NULL;
+		break;
+	default:
+		break;
+	}
+	vmw_tt->mapped = false;
+}
+
+/**
+ * vmw_bo_sg_table - Return a struct vmw_sg_table object for a
+ * TTM buffer object
+ *
+ * @bo: Pointer to a struct ttm_buffer_object
+ *
+ * Returns a pointer to a struct vmw_sg_table object. The object should
+ * not be freed after use.
+ * Note that for the device addresses to be valid, the buffer object must
+ * either be reserved or pinned.
+ */
+const struct vmw_sg_table *vmw_bo_sg_table(struct ttm_buffer_object *bo)
+{
+	struct vmw_ttm_tt *vmw_tt =
+		container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
+
+	return &vmw_tt->vsgt;
+}
+
+
+static int vmw_ttm_bind(struct ttm_device *bdev,
+			struct ttm_tt *ttm, struct ttm_resource *bo_mem)
+{
+	struct vmw_ttm_tt *vmw_be =
+		container_of(ttm, struct vmw_ttm_tt, dma_ttm);
+	int ret = 0;
+
+	if (!bo_mem)
+		return -EINVAL;
+
+	if (vmw_be->bound)
+		return 0;
+
+	ret = vmw_ttm_map_dma(vmw_be);
+	if (unlikely(ret != 0))
+		return ret;
+
+	vmw_be->gmr_id = bo_mem->start;
+	vmw_be->mem_type = bo_mem->mem_type;
+
+	switch (bo_mem->mem_type) {
+	case VMW_PL_GMR:
+		ret = vmw_gmr_bind(vmw_be->dev_priv, &vmw_be->vsgt,
+				    ttm->num_pages, vmw_be->gmr_id);
+		break;
+	case VMW_PL_MOB:
+		if (unlikely(vmw_be->mob == NULL)) {
+			vmw_be->mob =
+				vmw_mob_create(ttm->num_pages);
+			if (unlikely(vmw_be->mob == NULL))
+				return -ENOMEM;
+		}
+
+		ret = vmw_mob_bind(vmw_be->dev_priv, vmw_be->mob,
+				    &vmw_be->vsgt, ttm->num_pages,
+				    vmw_be->gmr_id);
+		break;
+	case VMW_PL_SYSTEM:
+		/* Nothing to be done for a system bind */
+		break;
+	default:
+		BUG();
+	}
+	vmw_be->bound = true;
+	return ret;
+}
+
+static void vmw_ttm_unbind(struct ttm_device *bdev,
+			   struct ttm_tt *ttm)
+{
+	struct vmw_ttm_tt *vmw_be =
+		container_of(ttm, struct vmw_ttm_tt, dma_ttm);
+
+	if (!vmw_be->bound)
+		return;
+
+	switch (vmw_be->mem_type) {
+	case VMW_PL_GMR:
+		vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
+		break;
+	case VMW_PL_MOB:
+		vmw_mob_unbind(vmw_be->dev_priv, vmw_be->mob);
+		break;
+	case VMW_PL_SYSTEM:
+		break;
+	default:
+		BUG();
+	}
+
+	if (vmw_be->dev_priv->map_mode == vmw_dma_map_bind)
+		vmw_ttm_unmap_dma(vmw_be);
+	vmw_be->bound = false;
+}
+
+
+static void vmw_ttm_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
+{
+	struct vmw_ttm_tt *vmw_be =
+		container_of(ttm, struct vmw_ttm_tt, dma_ttm);
+
+	vmw_ttm_unmap_dma(vmw_be);
+	ttm_tt_fini(ttm);
+	if (vmw_be->mob)
+		vmw_mob_destroy(vmw_be->mob);
+
+	kfree(vmw_be);
+}
+
+
+static int vmw_ttm_populate(struct ttm_device *bdev,
+			    struct ttm_tt *ttm, struct ttm_operation_ctx *ctx)
+{
+	int ret;
+
+	/* TODO: maybe completely drop this ? */
+	if (ttm_tt_is_populated(ttm))
+		return 0;
+
+	ret = ttm_pool_alloc(&bdev->pool, ttm, ctx);
+
+	return ret;
+}
+
+static void vmw_ttm_unpopulate(struct ttm_device *bdev,
+			       struct ttm_tt *ttm)
+{
+	struct vmw_ttm_tt *vmw_tt = container_of(ttm, struct vmw_ttm_tt,
+						 dma_ttm);
+
+	vmw_ttm_unbind(bdev, ttm);
+
+	if (vmw_tt->mob) {
+		vmw_mob_destroy(vmw_tt->mob);
+		vmw_tt->mob = NULL;
+	}
+
+	vmw_ttm_unmap_dma(vmw_tt);
+
+	ttm_pool_free(&bdev->pool, ttm);
+}
+
+static struct ttm_tt *vmw_ttm_tt_create(struct ttm_buffer_object *bo,
+					uint32_t page_flags)
+{
+	struct vmw_ttm_tt *vmw_be;
+	int ret;
+
+	vmw_be = kzalloc(sizeof(*vmw_be), GFP_KERNEL);
+	if (!vmw_be)
+		return NULL;
+
+	vmw_be->dev_priv = vmw_priv_from_ttm(bo->bdev);
+	vmw_be->mob = NULL;
+
+	if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
+		ret = ttm_sg_tt_init(&vmw_be->dma_ttm, bo, page_flags,
+				     ttm_cached);
+	else
+		ret = ttm_tt_init(&vmw_be->dma_ttm, bo, page_flags,
+				  ttm_cached, 0);
+	if (unlikely(ret != 0))
+		goto out_no_init;
+
+	return &vmw_be->dma_ttm;
+out_no_init:
+	kfree(vmw_be);
+	return NULL;
+}
+
+static void vmw_evict_flags(struct ttm_buffer_object *bo,
+		     struct ttm_placement *placement)
+{
+	*placement = vmw_sys_placement;
+}
+
+static int vmw_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resource *mem)
+{
+	struct vmw_private *dev_priv = vmw_priv_from_ttm(bdev);
+
+	switch (mem->mem_type) {
+	case TTM_PL_SYSTEM:
+	case VMW_PL_SYSTEM:
+	case VMW_PL_GMR:
+	case VMW_PL_MOB:
+		return 0;
+	case TTM_PL_VRAM:
+		mem->bus.offset = (mem->start << PAGE_SHIFT) +
+			dev_priv->vram_start;
+		mem->bus.is_iomem = true;
+		mem->bus.caching = ttm_cached;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/**
+ * vmw_move_notify - TTM move_notify_callback
+ *
+ * @bo: The TTM buffer object about to move.
+ * @old_mem: The old memory where we move from
+ * @new_mem: The struct ttm_resource indicating to what memory
+ *       region the move is taking place.
+ *
+ * Calls move_notify for all subsystems needing it.
+ * (currently only resources).
+ */
+static void vmw_move_notify(struct ttm_buffer_object *bo,
+			    struct ttm_resource *old_mem,
+			    struct ttm_resource *new_mem)
+{
+	vmw_bo_move_notify(bo, new_mem);
+	vmw_query_move_notify(bo, old_mem, new_mem);
+}
+
+
+/**
+ * vmw_swap_notify - TTM move_notify_callback
+ *
+ * @bo: The TTM buffer object about to be swapped out.
+ */
+static void vmw_swap_notify(struct ttm_buffer_object *bo)
+{
+	vmw_bo_swap_notify(bo);
+	(void) ttm_bo_wait(bo, false, false);
+}
+
+static bool vmw_memtype_is_system(uint32_t mem_type)
+{
+	return mem_type == TTM_PL_SYSTEM || mem_type == VMW_PL_SYSTEM;
+}
+
+static int vmw_move(struct ttm_buffer_object *bo,
+		    bool evict,
+		    struct ttm_operation_ctx *ctx,
+		    struct ttm_resource *new_mem,
+		    struct ttm_place *hop)
+{
+	struct ttm_resource_manager *new_man;
+	struct ttm_resource_manager *old_man = NULL;
+	int ret = 0;
+
+	new_man = ttm_manager_type(bo->bdev, new_mem->mem_type);
+	if (bo->resource)
+		old_man = ttm_manager_type(bo->bdev, bo->resource->mem_type);
+
+	if (new_man->use_tt && !vmw_memtype_is_system(new_mem->mem_type)) {
+		ret = vmw_ttm_bind(bo->bdev, bo->ttm, new_mem);
+		if (ret)
+			return ret;
+	}
+
+	if (!bo->resource || (bo->resource->mem_type == TTM_PL_SYSTEM &&
+			      bo->ttm == NULL)) {
+		ttm_bo_move_null(bo, new_mem);
+		return 0;
+	}
+
+	vmw_move_notify(bo, bo->resource, new_mem);
+
+	if (old_man && old_man->use_tt && new_man->use_tt) {
+		if (vmw_memtype_is_system(bo->resource->mem_type)) {
+			ttm_bo_move_null(bo, new_mem);
+			return 0;
+		}
+		ret = ttm_bo_wait_ctx(bo, ctx);
+		if (ret)
+			goto fail;
+
+		vmw_ttm_unbind(bo->bdev, bo->ttm);
+		ttm_resource_free(bo, &bo->resource);
+		ttm_bo_assign_mem(bo, new_mem);
+		return 0;
+	} else {
+		ret = ttm_bo_move_memcpy(bo, ctx, new_mem);
+		if (ret)
+			goto fail;
+	}
+	return 0;
+fail:
+	vmw_move_notify(bo, new_mem, bo->resource);
+	return ret;
+}
+
+struct ttm_device_funcs vmw_bo_driver = {
+	.ttm_tt_create = &vmw_ttm_tt_create,
+	.ttm_tt_populate = &vmw_ttm_populate,
+	.ttm_tt_unpopulate = &vmw_ttm_unpopulate,
+	.ttm_tt_destroy = &vmw_ttm_destroy,
+	.eviction_valuable = ttm_bo_eviction_valuable,
+	.evict_flags = vmw_evict_flags,
+	.move = vmw_move,
+	.swap_notify = vmw_swap_notify,
+	.io_mem_reserve = &vmw_ttm_io_mem_reserve,
+};
+
+int vmw_bo_create_and_populate(struct vmw_private *dev_priv,
+			       size_t bo_size, u32 domain,
+			       struct vmw_bo **bo_p)
+{
+	struct ttm_operation_ctx ctx = {
+		.interruptible = false,
+		.no_wait_gpu = false
+	};
+	struct vmw_bo *vbo;
+	int ret;
+	struct vmw_bo_params bo_params = {
+		.domain = domain,
+		.busy_domain = domain,
+		.bo_type = ttm_bo_type_kernel,
+		.size = bo_size,
+		.pin = true
+	};
+
+	ret = vmw_bo_create(dev_priv, &bo_params, &vbo);
+	if (unlikely(ret != 0))
+		return ret;
+
+	ret = ttm_bo_reserve(&vbo->tbo, false, true, NULL);
+	BUG_ON(ret != 0);
+	ret = vmw_ttm_populate(vbo->tbo.bdev, vbo->tbo.ttm, &ctx);
+	if (likely(ret == 0)) {
+		struct vmw_ttm_tt *vmw_tt =
+			container_of(vbo->tbo.ttm, struct vmw_ttm_tt, dma_ttm);
+		ret = vmw_ttm_map_dma(vmw_tt);
+	}
+
+	ttm_bo_unreserve(&vbo->tbo);
+
+	if (likely(ret == 0))
+		*bo_p = vbo;
+	return ret;
+}