diff options
Diffstat (limited to 'kernel/drivers/gpu/drm/vmwgfx/vmwgfx_so.c')
| -rw-r--r-- | kernel/drivers/gpu/drm/vmwgfx/vmwgfx_so.c | 555 |
1 files changed, 555 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/vmwgfx/vmwgfx_so.c b/kernel/drivers/gpu/drm/vmwgfx/vmwgfx_so.c new file mode 100644 index 000000000..5a73eebd0 --- /dev/null +++ b/kernel/drivers/gpu/drm/vmwgfx/vmwgfx_so.c @@ -0,0 +1,555 @@ +/************************************************************************** + * Copyright © 2014-2015 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. + * + **************************************************************************/ + +#include "vmwgfx_drv.h" +#include "vmwgfx_resource_priv.h" +#include "vmwgfx_so.h" +#include "vmwgfx_binding.h" + +/* + * The currently only reason we need to keep track of views is that if we + * destroy a hardware surface, all views pointing to it must also be destroyed, + * otherwise the device will error. + * So in particuar if a surface is evicted, we must destroy all views pointing + * to it, and all context bindings of that view. Similarly we must restore + * the view bindings, views and surfaces pointed to by the views when a + * context is referenced in the command stream. + */ + +/** + * struct vmw_view - view metadata + * + * @res: The struct vmw_resource we derive from + * @ctx: Non-refcounted pointer to the context this view belongs to. + * @srf: Refcounted pointer to the surface pointed to by this view. + * @cotable: Refcounted pointer to the cotable holding this view. + * @srf_head: List head for the surface-to-view list. + * @cotable_head: List head for the cotable-to_view list. + * @view_type: View type. + * @view_id: User-space per context view id. Currently used also as per + * context device view id. + * @cmd_size: Size of the SVGA3D define view command that we've copied from the + * command stream. + * @committed: Whether the view is actually created or pending creation at the + * device level. + * @cmd: The SVGA3D define view command copied from the command stream. + */ +struct vmw_view { + struct rcu_head rcu; + struct vmw_resource res; + struct vmw_resource *ctx; /* Immutable */ + struct vmw_resource *srf; /* Immutable */ + struct vmw_resource *cotable; /* Immutable */ + struct list_head srf_head; /* Protected by binding_mutex */ + struct list_head cotable_head; /* Protected by binding_mutex */ + unsigned view_type; /* Immutable */ + unsigned view_id; /* Immutable */ + u32 cmd_size; /* Immutable */ + bool committed; /* Protected by binding_mutex */ + u32 cmd[1]; /* Immutable */ +}; + +static int vmw_view_create(struct vmw_resource *res); +static int vmw_view_destroy(struct vmw_resource *res); +static void vmw_hw_view_destroy(struct vmw_resource *res); +static void vmw_view_commit_notify(struct vmw_resource *res, + enum vmw_cmdbuf_res_state state); + +static const struct vmw_res_func vmw_view_func = { + .res_type = vmw_res_view, + .needs_backup = false, + .may_evict = false, + .type_name = "DX view", + .backup_placement = NULL, + .create = vmw_view_create, + .commit_notify = vmw_view_commit_notify, +}; + +/** + * struct vmw_view - view define command body stub + * + * @view_id: The device id of the view being defined + * @sid: The surface id of the view being defined + * + * This generic struct is used by the code to change @view_id and @sid of a + * saved view define command. + */ +struct vmw_view_define { + uint32 view_id; + uint32 sid; +}; + +/** + * vmw_view - Convert a struct vmw_resource to a struct vmw_view + * + * @res: Pointer to the resource to convert. + * + * Returns a pointer to a struct vmw_view. + */ +static struct vmw_view *vmw_view(struct vmw_resource *res) +{ + return container_of(res, struct vmw_view, res); +} + +/** + * vmw_view_commit_notify - Notify that a view operation has been committed to + * hardware from a user-supplied command stream. + * + * @res: Pointer to the view resource. + * @state: Indicating whether a creation or removal has been committed. + * + */ +static void vmw_view_commit_notify(struct vmw_resource *res, + enum vmw_cmdbuf_res_state state) +{ + struct vmw_view *view = vmw_view(res); + struct vmw_private *dev_priv = res->dev_priv; + + mutex_lock(&dev_priv->binding_mutex); + if (state == VMW_CMDBUF_RES_ADD) { + struct vmw_surface *srf = vmw_res_to_srf(view->srf); + + list_add_tail(&view->srf_head, &srf->view_list); + vmw_cotable_add_resource(view->cotable, &view->cotable_head); + view->committed = true; + res->id = view->view_id; + + } else { + list_del_init(&view->cotable_head); + list_del_init(&view->srf_head); + view->committed = false; + res->id = -1; + } + mutex_unlock(&dev_priv->binding_mutex); +} + +/** + * vmw_view_create - Create a hardware view. + * + * @res: Pointer to the view resource. + * + * Create a hardware view. Typically used if that view has previously been + * destroyed by an eviction operation. + */ +static int vmw_view_create(struct vmw_resource *res) +{ + struct vmw_view *view = vmw_view(res); + struct vmw_surface *srf = vmw_res_to_srf(view->srf); + struct vmw_private *dev_priv = res->dev_priv; + struct { + SVGA3dCmdHeader header; + struct vmw_view_define body; + } *cmd; + + mutex_lock(&dev_priv->binding_mutex); + if (!view->committed) { + mutex_unlock(&dev_priv->binding_mutex); + return 0; + } + + cmd = vmw_fifo_reserve_dx(res->dev_priv, view->cmd_size, + view->ctx->id); + if (!cmd) { + DRM_ERROR("Failed reserving FIFO space for view creation.\n"); + mutex_unlock(&dev_priv->binding_mutex); + return -ENOMEM; + } + memcpy(cmd, &view->cmd, view->cmd_size); + WARN_ON(cmd->body.view_id != view->view_id); + /* Sid may have changed due to surface eviction. */ + WARN_ON(view->srf->id == SVGA3D_INVALID_ID); + cmd->body.sid = view->srf->id; + vmw_fifo_commit(res->dev_priv, view->cmd_size); + res->id = view->view_id; + list_add_tail(&view->srf_head, &srf->view_list); + vmw_cotable_add_resource(view->cotable, &view->cotable_head); + mutex_unlock(&dev_priv->binding_mutex); + + return 0; +} + +/** + * vmw_view_destroy - Destroy a hardware view. + * + * @res: Pointer to the view resource. + * + * Destroy a hardware view. Typically used on unexpected termination of the + * owning process or if the surface the view is pointing to is destroyed. + */ +static int vmw_view_destroy(struct vmw_resource *res) +{ + struct vmw_private *dev_priv = res->dev_priv; + struct vmw_view *view = vmw_view(res); + struct { + SVGA3dCmdHeader header; + union vmw_view_destroy body; + } *cmd; + + WARN_ON_ONCE(!mutex_is_locked(&dev_priv->binding_mutex)); + vmw_binding_res_list_scrub(&res->binding_head); + + if (!view->committed || res->id == -1) + return 0; + + cmd = vmw_fifo_reserve_dx(dev_priv, sizeof(*cmd), view->ctx->id); + if (!cmd) { + DRM_ERROR("Failed reserving FIFO space for view " + "destruction.\n"); + return -ENOMEM; + } + + cmd->header.id = vmw_view_destroy_cmds[view->view_type]; + cmd->header.size = sizeof(cmd->body); + cmd->body.view_id = view->view_id; + vmw_fifo_commit(dev_priv, sizeof(*cmd)); + res->id = -1; + list_del_init(&view->cotable_head); + list_del_init(&view->srf_head); + + return 0; +} + +/** + * vmw_hw_view_destroy - Destroy a hardware view as part of resource cleanup. + * + * @res: Pointer to the view resource. + * + * Destroy a hardware view if it's still present. + */ +static void vmw_hw_view_destroy(struct vmw_resource *res) +{ + struct vmw_private *dev_priv = res->dev_priv; + + mutex_lock(&dev_priv->binding_mutex); + WARN_ON(vmw_view_destroy(res)); + res->id = -1; + mutex_unlock(&dev_priv->binding_mutex); +} + +/** + * vmw_view_key - Compute a view key suitable for the cmdbuf resource manager + * + * @user_key: The user-space id used for the view. + * @view_type: The view type. + * + * Destroy a hardware view if it's still present. + */ +static u32 vmw_view_key(u32 user_key, enum vmw_view_type view_type) +{ + return user_key | (view_type << 20); +} + +/** + * vmw_view_id_ok - Basic view id and type range checks. + * + * @user_key: The user-space id used for the view. + * @view_type: The view type. + * + * Checks that the view id and type (typically provided by user-space) is + * valid. + */ +static bool vmw_view_id_ok(u32 user_key, enum vmw_view_type view_type) +{ + return (user_key < SVGA_COTABLE_MAX_IDS && + view_type < vmw_view_max); +} + +/** + * vmw_view_res_free - resource res_free callback for view resources + * + * @res: Pointer to a struct vmw_resource + * + * Frees memory and memory accounting held by a struct vmw_view. + */ +static void vmw_view_res_free(struct vmw_resource *res) +{ + struct vmw_view *view = vmw_view(res); + size_t size = offsetof(struct vmw_view, cmd) + view->cmd_size; + struct vmw_private *dev_priv = res->dev_priv; + + vmw_resource_unreference(&view->cotable); + vmw_resource_unreference(&view->srf); + kfree_rcu(view, rcu); + ttm_mem_global_free(vmw_mem_glob(dev_priv), size); +} + +/** + * vmw_view_add - Create a view resource and stage it for addition + * as a command buffer managed resource. + * + * @man: Pointer to the compat shader manager identifying the shader namespace. + * @ctx: Pointer to a struct vmw_resource identifying the active context. + * @srf: Pointer to a struct vmw_resource identifying the surface the view + * points to. + * @view_type: The view type deduced from the view create command. + * @user_key: The key that is used to identify the shader. The key is + * unique to the view type and to the context. + * @cmd: Pointer to the view create command in the command stream. + * @cmd_size: Size of the view create command in the command stream. + * @list: Caller's list of staged command buffer resource actions. + */ +int vmw_view_add(struct vmw_cmdbuf_res_manager *man, + struct vmw_resource *ctx, + struct vmw_resource *srf, + enum vmw_view_type view_type, + u32 user_key, + const void *cmd, + size_t cmd_size, + struct list_head *list) +{ + static const size_t vmw_view_define_sizes[] = { + [vmw_view_sr] = sizeof(SVGA3dCmdDXDefineShaderResourceView), + [vmw_view_rt] = sizeof(SVGA3dCmdDXDefineRenderTargetView), + [vmw_view_ds] = sizeof(SVGA3dCmdDXDefineDepthStencilView) + }; + + struct vmw_private *dev_priv = ctx->dev_priv; + struct vmw_resource *res; + struct vmw_view *view; + size_t size; + int ret; + + if (cmd_size != vmw_view_define_sizes[view_type] + + sizeof(SVGA3dCmdHeader)) { + DRM_ERROR("Illegal view create command size.\n"); + return -EINVAL; + } + + if (!vmw_view_id_ok(user_key, view_type)) { + DRM_ERROR("Illegal view add view id.\n"); + return -EINVAL; + } + + size = offsetof(struct vmw_view, cmd) + cmd_size; + + ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), size, false, true); + if (ret) { + if (ret != -ERESTARTSYS) + DRM_ERROR("Out of graphics memory for view" + " creation.\n"); + return ret; + } + + view = kmalloc(size, GFP_KERNEL); + if (!view) { + ttm_mem_global_free(vmw_mem_glob(dev_priv), size); + return -ENOMEM; + } + + res = &view->res; + view->ctx = ctx; + view->srf = vmw_resource_reference(srf); + view->cotable = vmw_context_cotable(ctx, vmw_view_cotables[view_type]); + view->view_type = view_type; + view->view_id = user_key; + view->cmd_size = cmd_size; + view->committed = false; + INIT_LIST_HEAD(&view->srf_head); + INIT_LIST_HEAD(&view->cotable_head); + memcpy(&view->cmd, cmd, cmd_size); + ret = vmw_resource_init(dev_priv, res, true, + vmw_view_res_free, &vmw_view_func); + if (ret) + goto out_resource_init; + + ret = vmw_cmdbuf_res_add(man, vmw_cmdbuf_res_view, + vmw_view_key(user_key, view_type), + res, list); + if (ret) + goto out_resource_init; + + res->id = view->view_id; + vmw_resource_activate(res, vmw_hw_view_destroy); + +out_resource_init: + vmw_resource_unreference(&res); + + return ret; +} + +/** + * vmw_view_remove - Stage a view for removal. + * + * @man: Pointer to the view manager identifying the shader namespace. + * @user_key: The key that is used to identify the view. The key is + * unique to the view type. + * @view_type: View type + * @list: Caller's list of staged command buffer resource actions. + * @res_p: If the resource is in an already committed state, points to the + * struct vmw_resource on successful return. The pointer will be + * non ref-counted. + */ +int vmw_view_remove(struct vmw_cmdbuf_res_manager *man, + u32 user_key, enum vmw_view_type view_type, + struct list_head *list, + struct vmw_resource **res_p) +{ + if (!vmw_view_id_ok(user_key, view_type)) { + DRM_ERROR("Illegal view remove view id.\n"); + return -EINVAL; + } + + return vmw_cmdbuf_res_remove(man, vmw_cmdbuf_res_view, + vmw_view_key(user_key, view_type), + list, res_p); +} + +/** + * vmw_view_cotable_list_destroy - Evict all views belonging to a cotable. + * + * @dev_priv: Pointer to a device private struct. + * @list: List of views belonging to a cotable. + * @readback: Unused. Needed for function interface only. + * + * This function evicts all views belonging to a cotable. + * It must be called with the binding_mutex held, and the caller must hold + * a reference to the view resource. This is typically called before the + * cotable is paged out. + */ +void vmw_view_cotable_list_destroy(struct vmw_private *dev_priv, + struct list_head *list, + bool readback) +{ + struct vmw_view *entry, *next; + + WARN_ON_ONCE(!mutex_is_locked(&dev_priv->binding_mutex)); + + list_for_each_entry_safe(entry, next, list, cotable_head) + WARN_ON(vmw_view_destroy(&entry->res)); +} + +/** + * vmw_view_surface_list_destroy - Evict all views pointing to a surface + * + * @dev_priv: Pointer to a device private struct. + * @list: List of views pointing to a surface. + * + * This function evicts all views pointing to a surface. This is typically + * called before the surface is evicted. + */ +void vmw_view_surface_list_destroy(struct vmw_private *dev_priv, + struct list_head *list) +{ + struct vmw_view *entry, *next; + + WARN_ON_ONCE(!mutex_is_locked(&dev_priv->binding_mutex)); + + list_for_each_entry_safe(entry, next, list, srf_head) + WARN_ON(vmw_view_destroy(&entry->res)); +} + +/** + * vmw_view_srf - Return a non-refcounted pointer to the surface a view is + * pointing to. + * + * @res: pointer to a view resource. + * + * Note that the view itself is holding a reference, so as long + * the view resource is alive, the surface resource will be. + */ +struct vmw_resource *vmw_view_srf(struct vmw_resource *res) +{ + return vmw_view(res)->srf; +} + +/** + * vmw_view_lookup - Look up a view. + * + * @man: The context's cmdbuf ref manager. + * @view_type: The view type. + * @user_key: The view user id. + * + * returns a refcounted pointer to a view or an error pointer if not found. + */ +struct vmw_resource *vmw_view_lookup(struct vmw_cmdbuf_res_manager *man, + enum vmw_view_type view_type, + u32 user_key) +{ + return vmw_cmdbuf_res_lookup(man, vmw_cmdbuf_res_view, + vmw_view_key(user_key, view_type)); +} + +const u32 vmw_view_destroy_cmds[] = { + [vmw_view_sr] = SVGA_3D_CMD_DX_DESTROY_SHADERRESOURCE_VIEW, + [vmw_view_rt] = SVGA_3D_CMD_DX_DESTROY_RENDERTARGET_VIEW, + [vmw_view_ds] = SVGA_3D_CMD_DX_DESTROY_DEPTHSTENCIL_VIEW, +}; + +const SVGACOTableType vmw_view_cotables[] = { + [vmw_view_sr] = SVGA_COTABLE_SRVIEW, + [vmw_view_rt] = SVGA_COTABLE_RTVIEW, + [vmw_view_ds] = SVGA_COTABLE_DSVIEW, +}; + +const SVGACOTableType vmw_so_cotables[] = { + [vmw_so_el] = SVGA_COTABLE_ELEMENTLAYOUT, + [vmw_so_bs] = SVGA_COTABLE_BLENDSTATE, + [vmw_so_ds] = SVGA_COTABLE_DEPTHSTENCIL, + [vmw_so_rs] = SVGA_COTABLE_RASTERIZERSTATE, + [vmw_so_ss] = SVGA_COTABLE_SAMPLER, + [vmw_so_so] = SVGA_COTABLE_STREAMOUTPUT +}; + + +/* To remove unused function warning */ +static void vmw_so_build_asserts(void) __attribute__((used)); + + +/* + * This function is unused at run-time, and only used to dump various build + * asserts important for code optimization assumptions. + */ +static void vmw_so_build_asserts(void) +{ + /* Assert that our vmw_view_cmd_to_type() function is correct. */ + BUILD_BUG_ON(SVGA_3D_CMD_DX_DESTROY_SHADERRESOURCE_VIEW != + SVGA_3D_CMD_DX_DEFINE_SHADERRESOURCE_VIEW + 1); + BUILD_BUG_ON(SVGA_3D_CMD_DX_DEFINE_RENDERTARGET_VIEW != + SVGA_3D_CMD_DX_DEFINE_SHADERRESOURCE_VIEW + 2); + BUILD_BUG_ON(SVGA_3D_CMD_DX_DESTROY_RENDERTARGET_VIEW != + SVGA_3D_CMD_DX_DEFINE_SHADERRESOURCE_VIEW + 3); + BUILD_BUG_ON(SVGA_3D_CMD_DX_DEFINE_DEPTHSTENCIL_VIEW != + SVGA_3D_CMD_DX_DEFINE_SHADERRESOURCE_VIEW + 4); + BUILD_BUG_ON(SVGA_3D_CMD_DX_DESTROY_DEPTHSTENCIL_VIEW != + SVGA_3D_CMD_DX_DEFINE_SHADERRESOURCE_VIEW + 5); + + /* Assert that our "one body fits all" assumption is valid */ + BUILD_BUG_ON(sizeof(union vmw_view_destroy) != sizeof(u32)); + + /* Assert that the view key space can hold all view ids. */ + BUILD_BUG_ON(SVGA_COTABLE_MAX_IDS >= ((1 << 20) - 1)); + + /* + * Assert that the offset of sid in all view define commands + * is what we assume it to be. + */ + BUILD_BUG_ON(offsetof(struct vmw_view_define, sid) != + offsetof(SVGA3dCmdDXDefineShaderResourceView, sid)); + BUILD_BUG_ON(offsetof(struct vmw_view_define, sid) != + offsetof(SVGA3dCmdDXDefineRenderTargetView, sid)); + BUILD_BUG_ON(offsetof(struct vmw_view_define, sid) != + offsetof(SVGA3dCmdDXDefineDepthStencilView, sid)); +} |