From f70575805708cabdedea7498aaa3f710fde4d920 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 03:29:01 +0000
Subject: [PATCH] add lvds1024*800
---
kernel/drivers/gpu/drm/bochs/bochs_mm.c | 523 ---------------------------------------------------------
1 files changed, 7 insertions(+), 516 deletions(-)
diff --git a/kernel/drivers/gpu/drm/bochs/bochs_mm.c b/kernel/drivers/gpu/drm/bochs/bochs_mm.c
index 39cd084..1b74f53 100644
--- a/kernel/drivers/gpu/drm/bochs/bochs_mm.c
+++ b/kernel/drivers/gpu/drm/bochs/bochs_mm.c
@@ -1,533 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
*/
#include "bochs.h"
-static void bochs_ttm_placement(struct bochs_bo *bo, int domain);
-
/* ---------------------------------------------------------------------- */
-
-static inline struct bochs_device *bochs_bdev(struct ttm_bo_device *bd)
-{
- return container_of(bd, struct bochs_device, ttm.bdev);
-}
-
-static int bochs_ttm_mem_global_init(struct drm_global_reference *ref)
-{
- return ttm_mem_global_init(ref->object);
-}
-
-static void bochs_ttm_mem_global_release(struct drm_global_reference *ref)
-{
- ttm_mem_global_release(ref->object);
-}
-
-static int bochs_ttm_global_init(struct bochs_device *bochs)
-{
- struct drm_global_reference *global_ref;
- int r;
-
- global_ref = &bochs->ttm.mem_global_ref;
- global_ref->global_type = DRM_GLOBAL_TTM_MEM;
- global_ref->size = sizeof(struct ttm_mem_global);
- global_ref->init = &bochs_ttm_mem_global_init;
- global_ref->release = &bochs_ttm_mem_global_release;
- r = drm_global_item_ref(global_ref);
- if (r != 0) {
- DRM_ERROR("Failed setting up TTM memory accounting "
- "subsystem.\n");
- return r;
- }
-
- bochs->ttm.bo_global_ref.mem_glob =
- bochs->ttm.mem_global_ref.object;
- global_ref = &bochs->ttm.bo_global_ref.ref;
- global_ref->global_type = DRM_GLOBAL_TTM_BO;
- global_ref->size = sizeof(struct ttm_bo_global);
- global_ref->init = &ttm_bo_global_init;
- global_ref->release = &ttm_bo_global_release;
- r = drm_global_item_ref(global_ref);
- if (r != 0) {
- DRM_ERROR("Failed setting up TTM BO subsystem.\n");
- drm_global_item_unref(&bochs->ttm.mem_global_ref);
- return r;
- }
-
- return 0;
-}
-
-static void bochs_ttm_global_release(struct bochs_device *bochs)
-{
- if (bochs->ttm.mem_global_ref.release == NULL)
- return;
-
- drm_global_item_unref(&bochs->ttm.bo_global_ref.ref);
- drm_global_item_unref(&bochs->ttm.mem_global_ref);
- bochs->ttm.mem_global_ref.release = NULL;
-}
-
-
-static void bochs_bo_ttm_destroy(struct ttm_buffer_object *tbo)
-{
- struct bochs_bo *bo;
-
- bo = container_of(tbo, struct bochs_bo, bo);
- drm_gem_object_release(&bo->gem);
- kfree(bo);
-}
-
-static bool bochs_ttm_bo_is_bochs_bo(struct ttm_buffer_object *bo)
-{
- if (bo->destroy == &bochs_bo_ttm_destroy)
- return true;
- return false;
-}
-
-static int bochs_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
- struct ttm_mem_type_manager *man)
-{
- switch (type) {
- case TTM_PL_SYSTEM:
- man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
- man->available_caching = TTM_PL_MASK_CACHING;
- man->default_caching = TTM_PL_FLAG_CACHED;
- break;
- case TTM_PL_VRAM:
- man->func = &ttm_bo_manager_func;
- man->flags = TTM_MEMTYPE_FLAG_FIXED |
- TTM_MEMTYPE_FLAG_MAPPABLE;
- man->available_caching = TTM_PL_FLAG_UNCACHED |
- TTM_PL_FLAG_WC;
- man->default_caching = TTM_PL_FLAG_WC;
- break;
- default:
- DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
- return -EINVAL;
- }
- return 0;
-}
-
-static void
-bochs_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
-{
- struct bochs_bo *bochsbo = bochs_bo(bo);
-
- if (!bochs_ttm_bo_is_bochs_bo(bo))
- return;
-
- bochs_ttm_placement(bochsbo, TTM_PL_FLAG_SYSTEM);
- *pl = bochsbo->placement;
-}
-
-static int bochs_bo_verify_access(struct ttm_buffer_object *bo,
- struct file *filp)
-{
- struct bochs_bo *bochsbo = bochs_bo(bo);
-
- return drm_vma_node_verify_access(&bochsbo->gem.vma_node,
- filp->private_data);
-}
-
-static int bochs_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
- struct ttm_mem_reg *mem)
-{
- struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
- struct bochs_device *bochs = bochs_bdev(bdev);
-
- mem->bus.addr = NULL;
- mem->bus.offset = 0;
- mem->bus.size = mem->num_pages << PAGE_SHIFT;
- mem->bus.base = 0;
- mem->bus.is_iomem = false;
- if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
- return -EINVAL;
- switch (mem->mem_type) {
- case TTM_PL_SYSTEM:
- /* system memory */
- return 0;
- case TTM_PL_VRAM:
- mem->bus.offset = mem->start << PAGE_SHIFT;
- mem->bus.base = bochs->fb_base;
- mem->bus.is_iomem = true;
- break;
- default:
- return -EINVAL;
- break;
- }
- return 0;
-}
-
-static void bochs_ttm_io_mem_free(struct ttm_bo_device *bdev,
- struct ttm_mem_reg *mem)
-{
-}
-
-static void bochs_ttm_backend_destroy(struct ttm_tt *tt)
-{
- ttm_tt_fini(tt);
- kfree(tt);
-}
-
-static struct ttm_backend_func bochs_tt_backend_func = {
- .destroy = &bochs_ttm_backend_destroy,
-};
-
-static struct ttm_tt *bochs_ttm_tt_create(struct ttm_buffer_object *bo,
- uint32_t page_flags)
-{
- struct ttm_tt *tt;
-
- tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
- if (tt == NULL)
- return NULL;
- tt->func = &bochs_tt_backend_func;
- if (ttm_tt_init(tt, bo, page_flags)) {
- kfree(tt);
- return NULL;
- }
- return tt;
-}
-
-static struct ttm_bo_driver bochs_bo_driver = {
- .ttm_tt_create = bochs_ttm_tt_create,
- .init_mem_type = bochs_bo_init_mem_type,
- .eviction_valuable = ttm_bo_eviction_valuable,
- .evict_flags = bochs_bo_evict_flags,
- .move = NULL,
- .verify_access = bochs_bo_verify_access,
- .io_mem_reserve = &bochs_ttm_io_mem_reserve,
- .io_mem_free = &bochs_ttm_io_mem_free,
-};
int bochs_mm_init(struct bochs_device *bochs)
{
- struct ttm_bo_device *bdev = &bochs->ttm.bdev;
- int ret;
+ struct drm_vram_mm *vmm;
- ret = bochs_ttm_global_init(bochs);
- if (ret)
- return ret;
-
- ret = ttm_bo_device_init(&bochs->ttm.bdev,
- bochs->ttm.bo_global_ref.ref.object,
- &bochs_bo_driver,
- bochs->dev->anon_inode->i_mapping,
- DRM_FILE_PAGE_OFFSET,
- true);
- if (ret) {
- DRM_ERROR("Error initialising bo driver; %d\n", ret);
- return ret;
- }
-
- ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
- bochs->fb_size >> PAGE_SHIFT);
- if (ret) {
- DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
- return ret;
- }
-
- bochs->ttm.initialized = true;
- return 0;
+ vmm = drm_vram_helper_alloc_mm(bochs->dev, bochs->fb_base,
+ bochs->fb_size);
+ return PTR_ERR_OR_ZERO(vmm);
}
void bochs_mm_fini(struct bochs_device *bochs)
{
- if (!bochs->ttm.initialized)
+ if (!bochs->dev->vram_mm)
return;
- ttm_bo_device_release(&bochs->ttm.bdev);
- bochs_ttm_global_release(bochs);
- bochs->ttm.initialized = false;
+ drm_vram_helper_release_mm(bochs->dev);
}
-
-static void bochs_ttm_placement(struct bochs_bo *bo, int domain)
-{
- unsigned i;
- u32 c = 0;
- bo->placement.placement = bo->placements;
- bo->placement.busy_placement = bo->placements;
- if (domain & TTM_PL_FLAG_VRAM) {
- bo->placements[c++].flags = TTM_PL_FLAG_WC
- | TTM_PL_FLAG_UNCACHED
- | TTM_PL_FLAG_VRAM;
- }
- if (domain & TTM_PL_FLAG_SYSTEM) {
- bo->placements[c++].flags = TTM_PL_MASK_CACHING
- | TTM_PL_FLAG_SYSTEM;
- }
- if (!c) {
- bo->placements[c++].flags = TTM_PL_MASK_CACHING
- | TTM_PL_FLAG_SYSTEM;
- }
- for (i = 0; i < c; ++i) {
- bo->placements[i].fpfn = 0;
- bo->placements[i].lpfn = 0;
- }
- bo->placement.num_placement = c;
- bo->placement.num_busy_placement = c;
-}
-
-static inline u64 bochs_bo_gpu_offset(struct bochs_bo *bo)
-{
- return bo->bo.offset;
-}
-
-int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag, u64 *gpu_addr)
-{
- struct ttm_operation_ctx ctx = { false, false };
- int i, ret;
-
- if (bo->pin_count) {
- bo->pin_count++;
- if (gpu_addr)
- *gpu_addr = bochs_bo_gpu_offset(bo);
- return 0;
- }
-
- bochs_ttm_placement(bo, pl_flag);
- for (i = 0; i < bo->placement.num_placement; i++)
- bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
- ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
- if (ret)
- return ret;
-
- bo->pin_count = 1;
- if (gpu_addr)
- *gpu_addr = bochs_bo_gpu_offset(bo);
- return 0;
-}
-
-int bochs_bo_unpin(struct bochs_bo *bo)
-{
- struct ttm_operation_ctx ctx = { false, false };
- int i, ret;
-
- if (!bo->pin_count) {
- DRM_ERROR("unpin bad %p\n", bo);
- return 0;
- }
- bo->pin_count--;
-
- if (bo->pin_count)
- return 0;
-
- for (i = 0; i < bo->placement.num_placement; i++)
- bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
- ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
- if (ret)
- return ret;
-
- return 0;
-}
-
-int bochs_mmap(struct file *filp, struct vm_area_struct *vma)
-{
- struct drm_file *file_priv;
- struct bochs_device *bochs;
-
- if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
- return -EINVAL;
-
- file_priv = filp->private_data;
- bochs = file_priv->minor->dev->dev_private;
- return ttm_bo_mmap(filp, vma, &bochs->ttm.bdev);
-}
-
-/* ---------------------------------------------------------------------- */
-
-static int bochs_bo_create(struct drm_device *dev, int size, int align,
- uint32_t flags, struct bochs_bo **pbochsbo)
-{
- struct bochs_device *bochs = dev->dev_private;
- struct bochs_bo *bochsbo;
- size_t acc_size;
- int ret;
-
- bochsbo = kzalloc(sizeof(struct bochs_bo), GFP_KERNEL);
- if (!bochsbo)
- return -ENOMEM;
-
- ret = drm_gem_object_init(dev, &bochsbo->gem, size);
- if (ret) {
- kfree(bochsbo);
- return ret;
- }
-
- bochsbo->bo.bdev = &bochs->ttm.bdev;
- bochsbo->bo.bdev->dev_mapping = dev->anon_inode->i_mapping;
-
- bochs_ttm_placement(bochsbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
-
- acc_size = ttm_bo_dma_acc_size(&bochs->ttm.bdev, size,
- sizeof(struct bochs_bo));
-
- ret = ttm_bo_init(&bochs->ttm.bdev, &bochsbo->bo, size,
- ttm_bo_type_device, &bochsbo->placement,
- align >> PAGE_SHIFT, false, acc_size,
- NULL, NULL, bochs_bo_ttm_destroy);
- if (ret)
- return ret;
-
- *pbochsbo = bochsbo;
- return 0;
-}
-
-int bochs_gem_create(struct drm_device *dev, u32 size, bool iskernel,
- struct drm_gem_object **obj)
-{
- struct bochs_bo *bochsbo;
- int ret;
-
- *obj = NULL;
-
- size = PAGE_ALIGN(size);
- if (size == 0)
- return -EINVAL;
-
- ret = bochs_bo_create(dev, size, 0, 0, &bochsbo);
- if (ret) {
- if (ret != -ERESTARTSYS)
- DRM_ERROR("failed to allocate GEM object\n");
- return ret;
- }
- *obj = &bochsbo->gem;
- return 0;
-}
-
-int bochs_dumb_create(struct drm_file *file, struct drm_device *dev,
- struct drm_mode_create_dumb *args)
-{
- struct drm_gem_object *gobj;
- u32 handle;
- int ret;
-
- args->pitch = args->width * ((args->bpp + 7) / 8);
- args->size = args->pitch * args->height;
-
- ret = bochs_gem_create(dev, args->size, false,
- &gobj);
- if (ret)
- return ret;
-
- ret = drm_gem_handle_create(file, gobj, &handle);
- drm_gem_object_unreference_unlocked(gobj);
- if (ret)
- return ret;
-
- args->handle = handle;
- return 0;
-}
-
-static void bochs_bo_unref(struct bochs_bo **bo)
-{
- struct ttm_buffer_object *tbo;
-
- if ((*bo) == NULL)
- return;
-
- tbo = &((*bo)->bo);
- ttm_bo_unref(&tbo);
- *bo = NULL;
-}
-
-void bochs_gem_free_object(struct drm_gem_object *obj)
-{
- struct bochs_bo *bochs_bo = gem_to_bochs_bo(obj);
-
- bochs_bo_unref(&bochs_bo);
-}
-
-int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
- uint32_t handle, uint64_t *offset)
-{
- struct drm_gem_object *obj;
- struct bochs_bo *bo;
-
- obj = drm_gem_object_lookup(file, handle);
- if (obj == NULL)
- return -ENOENT;
-
- bo = gem_to_bochs_bo(obj);
- *offset = bochs_bo_mmap_offset(bo);
-
- drm_gem_object_unreference_unlocked(obj);
- return 0;
-}
-
-/* ---------------------------------------------------------------------- */
-
-static void bochs_user_framebuffer_destroy(struct drm_framebuffer *fb)
-{
- struct bochs_framebuffer *bochs_fb = to_bochs_framebuffer(fb);
-
- drm_gem_object_unreference_unlocked(bochs_fb->obj);
- drm_framebuffer_cleanup(fb);
- kfree(fb);
-}
-
-static const struct drm_framebuffer_funcs bochs_fb_funcs = {
- .destroy = bochs_user_framebuffer_destroy,
-};
-
-int bochs_framebuffer_init(struct drm_device *dev,
- struct bochs_framebuffer *gfb,
- const struct drm_mode_fb_cmd2 *mode_cmd,
- struct drm_gem_object *obj)
-{
- int ret;
-
- drm_helper_mode_fill_fb_struct(dev, &gfb->base, mode_cmd);
- gfb->obj = obj;
- ret = drm_framebuffer_init(dev, &gfb->base, &bochs_fb_funcs);
- if (ret) {
- DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
- return ret;
- }
- return 0;
-}
-
-static struct drm_framebuffer *
-bochs_user_framebuffer_create(struct drm_device *dev,
- struct drm_file *filp,
- const struct drm_mode_fb_cmd2 *mode_cmd)
-{
- struct drm_gem_object *obj;
- struct bochs_framebuffer *bochs_fb;
- int ret;
-
- DRM_DEBUG_DRIVER("%dx%d, format %c%c%c%c\n",
- mode_cmd->width, mode_cmd->height,
- (mode_cmd->pixel_format) & 0xff,
- (mode_cmd->pixel_format >> 8) & 0xff,
- (mode_cmd->pixel_format >> 16) & 0xff,
- (mode_cmd->pixel_format >> 24) & 0xff);
-
- if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888)
- return ERR_PTR(-ENOENT);
-
- obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
- if (obj == NULL)
- return ERR_PTR(-ENOENT);
-
- bochs_fb = kzalloc(sizeof(*bochs_fb), GFP_KERNEL);
- if (!bochs_fb) {
- drm_gem_object_unreference_unlocked(obj);
- return ERR_PTR(-ENOMEM);
- }
-
- ret = bochs_framebuffer_init(dev, bochs_fb, mode_cmd, obj);
- if (ret) {
- drm_gem_object_unreference_unlocked(obj);
- kfree(bochs_fb);
- return ERR_PTR(ret);
- }
- return &bochs_fb->base;
-}
-
-const struct drm_mode_config_funcs bochs_mode_funcs = {
- .fb_create = bochs_user_framebuffer_create,
-};
--
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