diff options
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_mob.c')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_mob.c | 651 |
1 files changed, 651 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c b/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c new file mode 100644 index 000000000..7f95ed6aa --- /dev/null +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c @@ -0,0 +1,651 @@ +// SPDX-License-Identifier: GPL-2.0 OR MIT +/************************************************************************** + * + * Copyright 2012-2015 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 <linux/highmem.h> + +#include "vmwgfx_drv.h" + +/* + * If we set up the screen target otable, screen objects stop working. + */ + +#define VMW_OTABLE_SETUP_SUB ((VMWGFX_ENABLE_SCREEN_TARGET_OTABLE ? 0 : 1)) + +#ifdef CONFIG_64BIT +#define VMW_PPN_SIZE 8 +#define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PTDEPTH64_0 +#define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PTDEPTH64_1 +#define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PTDEPTH64_2 +#else +#define VMW_PPN_SIZE 4 +#define VMW_MOBFMT_PTDEPTH_0 SVGA3D_MOBFMT_PTDEPTH_0 +#define VMW_MOBFMT_PTDEPTH_1 SVGA3D_MOBFMT_PTDEPTH_1 +#define VMW_MOBFMT_PTDEPTH_2 SVGA3D_MOBFMT_PTDEPTH_2 +#endif + +/* + * struct vmw_mob - Structure containing page table and metadata for a + * Guest Memory OBject. + * + * @num_pages Number of pages that make up the page table. + * @pt_level The indirection level of the page table. 0-2. + * @pt_root_page DMA address of the level 0 page of the page table. + */ +struct vmw_mob { + struct ttm_buffer_object *pt_bo; + unsigned long num_pages; + unsigned pt_level; + dma_addr_t pt_root_page; + uint32_t id; +}; + +/* + * struct vmw_otable - Guest Memory OBject table metadata + * + * @size: Size of the table (page-aligned). + * @page_table: Pointer to a struct vmw_mob holding the page table. + */ +static const struct vmw_otable pre_dx_tables[] = { + {VMWGFX_NUM_MOB * SVGA3D_OTABLE_MOB_ENTRY_SIZE, NULL, true}, + {VMWGFX_NUM_GB_SURFACE * SVGA3D_OTABLE_SURFACE_ENTRY_SIZE, NULL, true}, + {VMWGFX_NUM_GB_CONTEXT * SVGA3D_OTABLE_CONTEXT_ENTRY_SIZE, NULL, true}, + {VMWGFX_NUM_GB_SHADER * SVGA3D_OTABLE_SHADER_ENTRY_SIZE, NULL, true}, + {VMWGFX_NUM_GB_SCREEN_TARGET * SVGA3D_OTABLE_SCREEN_TARGET_ENTRY_SIZE, + NULL, VMWGFX_ENABLE_SCREEN_TARGET_OTABLE} +}; + +static const struct vmw_otable dx_tables[] = { + {VMWGFX_NUM_MOB * SVGA3D_OTABLE_MOB_ENTRY_SIZE, NULL, true}, + {VMWGFX_NUM_GB_SURFACE * SVGA3D_OTABLE_SURFACE_ENTRY_SIZE, NULL, true}, + {VMWGFX_NUM_GB_CONTEXT * SVGA3D_OTABLE_CONTEXT_ENTRY_SIZE, NULL, true}, + {VMWGFX_NUM_GB_SHADER * SVGA3D_OTABLE_SHADER_ENTRY_SIZE, NULL, true}, + {VMWGFX_NUM_GB_SCREEN_TARGET * SVGA3D_OTABLE_SCREEN_TARGET_ENTRY_SIZE, + NULL, VMWGFX_ENABLE_SCREEN_TARGET_OTABLE}, + {VMWGFX_NUM_DXCONTEXT * sizeof(SVGAOTableDXContextEntry), NULL, true}, +}; + +static int vmw_mob_pt_populate(struct vmw_private *dev_priv, + struct vmw_mob *mob); +static void vmw_mob_pt_setup(struct vmw_mob *mob, + struct vmw_piter data_iter, + unsigned long num_data_pages); + +/* + * vmw_setup_otable_base - Issue an object table base setup command to + * the device + * + * @dev_priv: Pointer to a device private structure + * @type: Type of object table base + * @offset Start of table offset into dev_priv::otable_bo + * @otable Pointer to otable metadata; + * + * This function returns -ENOMEM if it fails to reserve fifo space, + * and may block waiting for fifo space. + */ +static int vmw_setup_otable_base(struct vmw_private *dev_priv, + SVGAOTableType type, + struct ttm_buffer_object *otable_bo, + unsigned long offset, + struct vmw_otable *otable) +{ + struct { + SVGA3dCmdHeader header; + SVGA3dCmdSetOTableBase64 body; + } *cmd; + struct vmw_mob *mob; + const struct vmw_sg_table *vsgt; + struct vmw_piter iter; + int ret; + + BUG_ON(otable->page_table != NULL); + + vsgt = vmw_bo_sg_table(otable_bo); + vmw_piter_start(&iter, vsgt, offset >> PAGE_SHIFT); + WARN_ON(!vmw_piter_next(&iter)); + + mob = vmw_mob_create(otable->size >> PAGE_SHIFT); + if (unlikely(mob == NULL)) { + DRM_ERROR("Failed creating OTable page table.\n"); + return -ENOMEM; + } + + if (otable->size <= PAGE_SIZE) { + mob->pt_level = VMW_MOBFMT_PTDEPTH_0; + mob->pt_root_page = vmw_piter_dma_addr(&iter); + } else if (vsgt->num_regions == 1) { + mob->pt_level = SVGA3D_MOBFMT_RANGE; + mob->pt_root_page = vmw_piter_dma_addr(&iter); + } else { + ret = vmw_mob_pt_populate(dev_priv, mob); + if (unlikely(ret != 0)) + goto out_no_populate; + + vmw_mob_pt_setup(mob, iter, otable->size >> PAGE_SHIFT); + mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; + } + + cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd)); + if (unlikely(cmd == NULL)) { + ret = -ENOMEM; + goto out_no_fifo; + } + + memset(cmd, 0, sizeof(*cmd)); + cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE64; + cmd->header.size = sizeof(cmd->body); + cmd->body.type = type; + cmd->body.baseAddress = mob->pt_root_page >> PAGE_SHIFT; + cmd->body.sizeInBytes = otable->size; + cmd->body.validSizeInBytes = 0; + cmd->body.ptDepth = mob->pt_level; + + /* + * The device doesn't support this, But the otable size is + * determined at compile-time, so this BUG shouldn't trigger + * randomly. + */ + BUG_ON(mob->pt_level == VMW_MOBFMT_PTDEPTH_2); + + vmw_fifo_commit(dev_priv, sizeof(*cmd)); + otable->page_table = mob; + + return 0; + +out_no_fifo: +out_no_populate: + vmw_mob_destroy(mob); + return ret; +} + +/* + * vmw_takedown_otable_base - Issue an object table base takedown command + * to the device + * + * @dev_priv: Pointer to a device private structure + * @type: Type of object table base + * + */ +static void vmw_takedown_otable_base(struct vmw_private *dev_priv, + SVGAOTableType type, + struct vmw_otable *otable) +{ + struct { + SVGA3dCmdHeader header; + SVGA3dCmdSetOTableBase body; + } *cmd; + struct ttm_buffer_object *bo; + + if (otable->page_table == NULL) + return; + + bo = otable->page_table->pt_bo; + cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd)); + if (unlikely(cmd == NULL)) + return; + + memset(cmd, 0, sizeof(*cmd)); + cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE; + cmd->header.size = sizeof(cmd->body); + cmd->body.type = type; + cmd->body.baseAddress = 0; + cmd->body.sizeInBytes = 0; + cmd->body.validSizeInBytes = 0; + cmd->body.ptDepth = SVGA3D_MOBFMT_INVALID; + vmw_fifo_commit(dev_priv, sizeof(*cmd)); + + if (bo) { + int ret; + + ret = ttm_bo_reserve(bo, false, true, NULL); + BUG_ON(ret != 0); + + vmw_bo_fence_single(bo, NULL); + ttm_bo_unreserve(bo); + } + + vmw_mob_destroy(otable->page_table); + otable->page_table = NULL; +} + + +static int vmw_otable_batch_setup(struct vmw_private *dev_priv, + struct vmw_otable_batch *batch) +{ + unsigned long offset; + unsigned long bo_size; + struct vmw_otable *otables = batch->otables; + SVGAOTableType i; + int ret; + + bo_size = 0; + for (i = 0; i < batch->num_otables; ++i) { + if (!otables[i].enabled) + continue; + + otables[i].size = + (otables[i].size + PAGE_SIZE - 1) & PAGE_MASK; + bo_size += otables[i].size; + } + + ret = vmw_bo_create_and_populate(dev_priv, bo_size, &batch->otable_bo); + if (unlikely(ret != 0)) + return ret; + + offset = 0; + for (i = 0; i < batch->num_otables; ++i) { + if (!batch->otables[i].enabled) + continue; + + ret = vmw_setup_otable_base(dev_priv, i, batch->otable_bo, + offset, + &otables[i]); + if (unlikely(ret != 0)) + goto out_no_setup; + offset += otables[i].size; + } + + return 0; + +out_no_setup: + for (i = 0; i < batch->num_otables; ++i) { + if (batch->otables[i].enabled) + vmw_takedown_otable_base(dev_priv, i, + &batch->otables[i]); + } + + ttm_bo_put(batch->otable_bo); + batch->otable_bo = NULL; + return ret; +} + +/* + * vmw_otables_setup - Set up guest backed memory object tables + * + * @dev_priv: Pointer to a device private structure + * + * Takes care of the device guest backed surface + * initialization, by setting up the guest backed memory object tables. + * Returns 0 on success and various error codes on failure. A successful return + * means the object tables can be taken down using the vmw_otables_takedown + * function. + */ +int vmw_otables_setup(struct vmw_private *dev_priv) +{ + struct vmw_otable **otables = &dev_priv->otable_batch.otables; + int ret; + + if (has_sm4_context(dev_priv)) { + *otables = kmemdup(dx_tables, sizeof(dx_tables), GFP_KERNEL); + if (!(*otables)) + return -ENOMEM; + + dev_priv->otable_batch.num_otables = ARRAY_SIZE(dx_tables); + } else { + *otables = kmemdup(pre_dx_tables, sizeof(pre_dx_tables), + GFP_KERNEL); + if (!(*otables)) + return -ENOMEM; + + dev_priv->otable_batch.num_otables = ARRAY_SIZE(pre_dx_tables); + } + + ret = vmw_otable_batch_setup(dev_priv, &dev_priv->otable_batch); + if (unlikely(ret != 0)) + goto out_setup; + + return 0; + +out_setup: + kfree(*otables); + return ret; +} + +static void vmw_otable_batch_takedown(struct vmw_private *dev_priv, + struct vmw_otable_batch *batch) +{ + SVGAOTableType i; + struct ttm_buffer_object *bo = batch->otable_bo; + int ret; + + for (i = 0; i < batch->num_otables; ++i) + if (batch->otables[i].enabled) + vmw_takedown_otable_base(dev_priv, i, + &batch->otables[i]); + + ret = ttm_bo_reserve(bo, false, true, NULL); + BUG_ON(ret != 0); + + vmw_bo_fence_single(bo, NULL); + ttm_bo_unreserve(bo); + + ttm_bo_put(batch->otable_bo); + batch->otable_bo = NULL; +} + +/* + * vmw_otables_takedown - Take down guest backed memory object tables + * + * @dev_priv: Pointer to a device private structure + * + * Take down the Guest Memory Object tables. + */ +void vmw_otables_takedown(struct vmw_private *dev_priv) +{ + vmw_otable_batch_takedown(dev_priv, &dev_priv->otable_batch); + kfree(dev_priv->otable_batch.otables); +} + +/* + * vmw_mob_calculate_pt_pages - Calculate the number of page table pages + * needed for a guest backed memory object. + * + * @data_pages: Number of data pages in the memory object buffer. + */ +static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages) +{ + unsigned long data_size = data_pages * PAGE_SIZE; + unsigned long tot_size = 0; + + while (likely(data_size > PAGE_SIZE)) { + data_size = DIV_ROUND_UP(data_size, PAGE_SIZE); + data_size *= VMW_PPN_SIZE; + tot_size += (data_size + PAGE_SIZE - 1) & PAGE_MASK; + } + + return tot_size >> PAGE_SHIFT; +} + +/* + * vmw_mob_create - Create a mob, but don't populate it. + * + * @data_pages: Number of data pages of the underlying buffer object. + */ +struct vmw_mob *vmw_mob_create(unsigned long data_pages) +{ + struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL); + + if (unlikely(!mob)) + return NULL; + + mob->num_pages = vmw_mob_calculate_pt_pages(data_pages); + + return mob; +} + +/* + * vmw_mob_pt_populate - Populate the mob pagetable + * + * @mob: Pointer to the mob the pagetable of which we want to + * populate. + * + * This function allocates memory to be used for the pagetable, and + * adjusts TTM memory accounting accordingly. Returns ENOMEM if + * memory resources aren't sufficient and may cause TTM buffer objects + * to be swapped out by using the TTM memory accounting function. + */ +static int vmw_mob_pt_populate(struct vmw_private *dev_priv, + struct vmw_mob *mob) +{ + BUG_ON(mob->pt_bo != NULL); + + return vmw_bo_create_and_populate(dev_priv, mob->num_pages * PAGE_SIZE, &mob->pt_bo); +} + +/** + * vmw_mob_assign_ppn - Assign a value to a page table entry + * + * @addr: Pointer to pointer to page table entry. + * @val: The page table entry + * + * Assigns a value to a page table entry pointed to by *@addr and increments + * *@addr according to the page table entry size. + */ +#if (VMW_PPN_SIZE == 8) +static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) +{ + *((u64 *) *addr) = val >> PAGE_SHIFT; + *addr += 2; +} +#else +static void vmw_mob_assign_ppn(u32 **addr, dma_addr_t val) +{ + *(*addr)++ = val >> PAGE_SHIFT; +} +#endif + +/* + * vmw_mob_build_pt - Build a pagetable + * + * @data_addr: Array of DMA addresses to the underlying buffer + * object's data pages. + * @num_data_pages: Number of buffer object data pages. + * @pt_pages: Array of page pointers to the page table pages. + * + * Returns the number of page table pages actually used. + * Uses atomic kmaps of highmem pages to avoid TLB thrashing. + */ +static unsigned long vmw_mob_build_pt(struct vmw_piter *data_iter, + unsigned long num_data_pages, + struct vmw_piter *pt_iter) +{ + unsigned long pt_size = num_data_pages * VMW_PPN_SIZE; + unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE); + unsigned long pt_page; + u32 *addr, *save_addr; + unsigned long i; + struct page *page; + + for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) { + page = vmw_piter_page(pt_iter); + + save_addr = addr = kmap_atomic(page); + + for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) { + vmw_mob_assign_ppn(&addr, + vmw_piter_dma_addr(data_iter)); + if (unlikely(--num_data_pages == 0)) + break; + WARN_ON(!vmw_piter_next(data_iter)); + } + kunmap_atomic(save_addr); + vmw_piter_next(pt_iter); + } + + return num_pt_pages; +} + +/* + * vmw_mob_build_pt - Set up a multilevel mob pagetable + * + * @mob: Pointer to a mob whose page table needs setting up. + * @data_addr Array of DMA addresses to the buffer object's data + * pages. + * @num_data_pages: Number of buffer object data pages. + * + * Uses tail recursion to set up a multilevel mob page table. + */ +static void vmw_mob_pt_setup(struct vmw_mob *mob, + struct vmw_piter data_iter, + unsigned long num_data_pages) +{ + unsigned long num_pt_pages = 0; + struct ttm_buffer_object *bo = mob->pt_bo; + struct vmw_piter save_pt_iter; + struct vmw_piter pt_iter; + const struct vmw_sg_table *vsgt; + int ret; + + ret = ttm_bo_reserve(bo, false, true, NULL); + BUG_ON(ret != 0); + + vsgt = vmw_bo_sg_table(bo); + vmw_piter_start(&pt_iter, vsgt, 0); + BUG_ON(!vmw_piter_next(&pt_iter)); + mob->pt_level = 0; + while (likely(num_data_pages > 1)) { + ++mob->pt_level; + BUG_ON(mob->pt_level > 2); + save_pt_iter = pt_iter; + num_pt_pages = vmw_mob_build_pt(&data_iter, num_data_pages, + &pt_iter); + data_iter = save_pt_iter; + num_data_pages = num_pt_pages; + } + + mob->pt_root_page = vmw_piter_dma_addr(&save_pt_iter); + ttm_bo_unreserve(bo); +} + +/* + * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary. + * + * @mob: Pointer to a mob to destroy. + */ +void vmw_mob_destroy(struct vmw_mob *mob) +{ + if (mob->pt_bo) { + ttm_bo_put(mob->pt_bo); + mob->pt_bo = NULL; + } + kfree(mob); +} + +/* + * vmw_mob_unbind - Hide a mob from the device. + * + * @dev_priv: Pointer to a device private. + * @mob_id: Device id of the mob to unbind. + */ +void vmw_mob_unbind(struct vmw_private *dev_priv, + struct vmw_mob *mob) +{ + struct { + SVGA3dCmdHeader header; + SVGA3dCmdDestroyGBMob body; + } *cmd; + int ret; + struct ttm_buffer_object *bo = mob->pt_bo; + + if (bo) { + ret = ttm_bo_reserve(bo, false, true, NULL); + /* + * Noone else should be using this buffer. + */ + BUG_ON(ret != 0); + } + + cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd)); + if (cmd) { + cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB; + cmd->header.size = sizeof(cmd->body); + cmd->body.mobid = mob->id; + vmw_fifo_commit(dev_priv, sizeof(*cmd)); + } + + if (bo) { + vmw_bo_fence_single(bo, NULL); + ttm_bo_unreserve(bo); + } + vmw_fifo_resource_dec(dev_priv); +} + +/* + * vmw_mob_bind - Make a mob visible to the device after first + * populating it if necessary. + * + * @dev_priv: Pointer to a device private. + * @mob: Pointer to the mob we're making visible. + * @data_addr: Array of DMA addresses to the data pages of the underlying + * buffer object. + * @num_data_pages: Number of data pages of the underlying buffer + * object. + * @mob_id: Device id of the mob to bind + * + * This function is intended to be interfaced with the ttm_tt backend + * code. + */ +int vmw_mob_bind(struct vmw_private *dev_priv, + struct vmw_mob *mob, + const struct vmw_sg_table *vsgt, + unsigned long num_data_pages, + int32_t mob_id) +{ + int ret; + bool pt_set_up = false; + struct vmw_piter data_iter; + struct { + SVGA3dCmdHeader header; + SVGA3dCmdDefineGBMob64 body; + } *cmd; + + mob->id = mob_id; + vmw_piter_start(&data_iter, vsgt, 0); + if (unlikely(!vmw_piter_next(&data_iter))) + return 0; + + if (likely(num_data_pages == 1)) { + mob->pt_level = VMW_MOBFMT_PTDEPTH_0; + mob->pt_root_page = vmw_piter_dma_addr(&data_iter); + } else if (vsgt->num_regions == 1) { + mob->pt_level = SVGA3D_MOBFMT_RANGE; + mob->pt_root_page = vmw_piter_dma_addr(&data_iter); + } else if (unlikely(mob->pt_bo == NULL)) { + ret = vmw_mob_pt_populate(dev_priv, mob); + if (unlikely(ret != 0)) + return ret; + + vmw_mob_pt_setup(mob, data_iter, num_data_pages); + pt_set_up = true; + mob->pt_level += VMW_MOBFMT_PTDEPTH_1 - SVGA3D_MOBFMT_PTDEPTH_1; + } + + vmw_fifo_resource_inc(dev_priv); + + cmd = VMW_FIFO_RESERVE(dev_priv, sizeof(*cmd)); + if (unlikely(cmd == NULL)) + goto out_no_cmd_space; + + cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB64; + cmd->header.size = sizeof(cmd->body); + cmd->body.mobid = mob_id; + cmd->body.ptDepth = mob->pt_level; + cmd->body.base = mob->pt_root_page >> PAGE_SHIFT; + cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE; + + vmw_fifo_commit(dev_priv, sizeof(*cmd)); + + return 0; + +out_no_cmd_space: + vmw_fifo_resource_dec(dev_priv); + if (pt_set_up) { + ttm_bo_put(mob->pt_bo); + mob->pt_bo = NULL; + } + + return -ENOMEM; +} |