295 lines
7.4 KiB
C
295 lines
7.4 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
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/*
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* Copyright 2021 VMware, Inc.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include "vmwgfx_drv.h"
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#include "drm/drm_prime.h"
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#include "drm/drm_gem_ttm_helper.h"
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/**
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* vmw_buffer_object - Convert a struct ttm_buffer_object to a struct
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* vmw_buffer_object.
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*
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* @bo: Pointer to the TTM buffer object.
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* Return: Pointer to the struct vmw_buffer_object embedding the
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* TTM buffer object.
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*/
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static struct vmw_buffer_object *
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vmw_buffer_object(struct ttm_buffer_object *bo)
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{
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return container_of(bo, struct vmw_buffer_object, base);
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}
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static void vmw_gem_object_free(struct drm_gem_object *gobj)
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{
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struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gobj);
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if (bo) {
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ttm_bo_put(bo);
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}
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}
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static int vmw_gem_object_open(struct drm_gem_object *obj,
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struct drm_file *file_priv)
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{
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return 0;
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}
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static void vmw_gem_object_close(struct drm_gem_object *obj,
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struct drm_file *file_priv)
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{
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}
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static int vmw_gem_pin_private(struct drm_gem_object *obj, bool do_pin)
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{
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struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(obj);
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struct vmw_buffer_object *vbo = vmw_buffer_object(bo);
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int ret;
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ret = ttm_bo_reserve(bo, false, false, NULL);
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if (unlikely(ret != 0))
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goto err;
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vmw_bo_pin_reserved(vbo, do_pin);
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ttm_bo_unreserve(bo);
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err:
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return ret;
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}
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static int vmw_gem_object_pin(struct drm_gem_object *obj)
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{
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return vmw_gem_pin_private(obj, true);
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}
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static void vmw_gem_object_unpin(struct drm_gem_object *obj)
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{
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vmw_gem_pin_private(obj, false);
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}
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static struct sg_table *vmw_gem_object_get_sg_table(struct drm_gem_object *obj)
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{
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struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(obj);
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struct vmw_ttm_tt *vmw_tt =
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container_of(bo->ttm, struct vmw_ttm_tt, dma_ttm);
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if (vmw_tt->vsgt.sgt)
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return vmw_tt->vsgt.sgt;
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return drm_prime_pages_to_sg(obj->dev, vmw_tt->dma_ttm.pages, vmw_tt->dma_ttm.num_pages);
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}
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static const struct drm_gem_object_funcs vmw_gem_object_funcs = {
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.free = vmw_gem_object_free,
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.open = vmw_gem_object_open,
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.close = vmw_gem_object_close,
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.print_info = drm_gem_ttm_print_info,
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.pin = vmw_gem_object_pin,
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.unpin = vmw_gem_object_unpin,
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.get_sg_table = vmw_gem_object_get_sg_table,
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.vmap = drm_gem_ttm_vmap,
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.vunmap = drm_gem_ttm_vunmap,
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.mmap = drm_gem_ttm_mmap,
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};
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/**
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* vmw_gem_destroy - vmw buffer object destructor
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*
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* @bo: Pointer to the embedded struct ttm_buffer_object
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*/
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void vmw_gem_destroy(struct ttm_buffer_object *bo)
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{
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struct vmw_buffer_object *vbo = vmw_buffer_object(bo);
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WARN_ON(vbo->dirty);
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WARN_ON(!RB_EMPTY_ROOT(&vbo->res_tree));
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vmw_bo_unmap(vbo);
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drm_gem_object_release(&vbo->base.base);
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kfree(vbo);
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}
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int vmw_gem_object_create_with_handle(struct vmw_private *dev_priv,
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struct drm_file *filp,
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uint32_t size,
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uint32_t *handle,
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struct vmw_buffer_object **p_vbo)
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{
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int ret;
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ret = vmw_bo_create(dev_priv, size,
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(dev_priv->has_mob) ?
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&vmw_sys_placement :
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&vmw_vram_sys_placement,
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true, false, &vmw_gem_destroy, p_vbo);
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if (ret != 0)
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goto out_no_bo;
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(*p_vbo)->base.base.funcs = &vmw_gem_object_funcs;
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ret = drm_gem_handle_create(filp, &(*p_vbo)->base.base, handle);
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out_no_bo:
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return ret;
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}
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int vmw_gem_object_create_ioctl(struct drm_device *dev, void *data,
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struct drm_file *filp)
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{
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struct vmw_private *dev_priv = vmw_priv(dev);
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union drm_vmw_alloc_dmabuf_arg *arg =
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(union drm_vmw_alloc_dmabuf_arg *)data;
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struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
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struct drm_vmw_dmabuf_rep *rep = &arg->rep;
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struct vmw_buffer_object *vbo;
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uint32_t handle;
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int ret;
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ret = vmw_gem_object_create_with_handle(dev_priv, filp,
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req->size, &handle, &vbo);
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if (ret)
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goto out_no_bo;
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rep->handle = handle;
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rep->map_handle = drm_vma_node_offset_addr(&vbo->base.base.vma_node);
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rep->cur_gmr_id = handle;
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rep->cur_gmr_offset = 0;
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/* drop reference from allocate - handle holds it now */
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drm_gem_object_put(&vbo->base.base);
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out_no_bo:
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return ret;
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}
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#if defined(CONFIG_DEBUG_FS)
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static void vmw_bo_print_info(int id, struct vmw_buffer_object *bo, struct seq_file *m)
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{
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const char *placement;
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const char *type;
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switch (bo->base.resource->mem_type) {
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case TTM_PL_SYSTEM:
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placement = " CPU";
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break;
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case VMW_PL_GMR:
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placement = " GMR";
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break;
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case VMW_PL_MOB:
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placement = " MOB";
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break;
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case VMW_PL_SYSTEM:
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placement = "VCPU";
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break;
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case TTM_PL_VRAM:
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placement = "VRAM";
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break;
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default:
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placement = "None";
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break;
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}
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switch (bo->base.type) {
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case ttm_bo_type_device:
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type = "device";
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break;
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case ttm_bo_type_kernel:
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type = "kernel";
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break;
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case ttm_bo_type_sg:
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type = "sg ";
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break;
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default:
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type = "none ";
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break;
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}
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seq_printf(m, "\t\t0x%08x: %12zu bytes %s, type = %s",
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id, bo->base.base.size, placement, type);
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seq_printf(m, ", priority = %u, pin_count = %u, GEM refs = %d, TTM refs = %d",
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bo->base.priority,
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bo->base.pin_count,
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kref_read(&bo->base.base.refcount),
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kref_read(&bo->base.kref));
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seq_puts(m, "\n");
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}
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static int vmw_debugfs_gem_info_show(struct seq_file *m, void *unused)
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{
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struct vmw_private *vdev = (struct vmw_private *)m->private;
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struct drm_device *dev = &vdev->drm;
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struct drm_file *file;
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int r;
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r = mutex_lock_interruptible(&dev->filelist_mutex);
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if (r)
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return r;
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list_for_each_entry(file, &dev->filelist, lhead) {
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struct task_struct *task;
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struct drm_gem_object *gobj;
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int id;
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/*
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* Although we have a valid reference on file->pid, that does
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* not guarantee that the task_struct who called get_pid() is
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* still alive (e.g. get_pid(current) => fork() => exit()).
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* Therefore, we need to protect this ->comm access using RCU.
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*/
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rcu_read_lock();
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task = pid_task(file->pid, PIDTYPE_PID);
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seq_printf(m, "pid %8d command %s:\n", pid_nr(file->pid),
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task ? task->comm : "<unknown>");
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rcu_read_unlock();
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spin_lock(&file->table_lock);
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idr_for_each_entry(&file->object_idr, gobj, id) {
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struct vmw_buffer_object *bo = gem_to_vmw_bo(gobj);
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vmw_bo_print_info(id, bo, m);
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}
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spin_unlock(&file->table_lock);
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}
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mutex_unlock(&dev->filelist_mutex);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(vmw_debugfs_gem_info);
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#endif
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void vmw_debugfs_gem_init(struct vmw_private *vdev)
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{
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#if defined(CONFIG_DEBUG_FS)
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struct drm_minor *minor = vdev->drm.primary;
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struct dentry *root = minor->debugfs_root;
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debugfs_create_file("vmwgfx_gem_info", 0444, root, vdev,
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&vmw_debugfs_gem_info_fops);
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#endif
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}
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