From 9f7d148022b12b0f706c9be99be94e934fbdb50d Mon Sep 17 00:00:00 2001 From: Thomas Hellstrom Date: Thu, 23 Mar 2017 15:19:45 -0700 Subject: [PATCH] drm/vmwgfx: Re-implement the stream resource as a simple resource. Provide and document a reference implementation. Signed-off-by: Thomas Hellstrom Reviewed-by: Sinclair Yeh --- drivers/gpu/drm/vmwgfx/Makefile | 2 +- drivers/gpu/drm/vmwgfx/vmwgfx_resource.c | 254 ----------------------- drivers/gpu/drm/vmwgfx/vmwgfx_va.c | 168 +++++++++++++++ 3 files changed, 169 insertions(+), 255 deletions(-) create mode 100644 drivers/gpu/drm/vmwgfx/vmwgfx_va.c diff --git a/drivers/gpu/drm/vmwgfx/Makefile b/drivers/gpu/drm/vmwgfx/Makefile index 2258908b1436..aac17a640cce 100644 --- a/drivers/gpu/drm/vmwgfx/Makefile +++ b/drivers/gpu/drm/vmwgfx/Makefile @@ -9,6 +9,6 @@ vmwgfx-y := vmwgfx_execbuf.o vmwgfx_gmr.o vmwgfx_kms.o vmwgfx_drv.o \ vmwgfx_surface.o vmwgfx_prime.o vmwgfx_mob.o vmwgfx_shader.o \ vmwgfx_cmdbuf_res.o vmwgfx_cmdbuf.o vmwgfx_stdu.o \ vmwgfx_cotable.o vmwgfx_so.o vmwgfx_binding.o vmwgfx_msg.o \ - vmwgfx_simple_resource.o + vmwgfx_simple_resource.o vmwgfx_va.o obj-$(CONFIG_DRM_VMWGFX) := vmwgfx.o diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c index 27033d944b08..fa1037ec8e5f 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c @@ -45,31 +45,6 @@ struct vmw_bo_user_rep { uint64_t map_handle; }; -struct vmw_stream { - struct vmw_resource res; - uint32_t stream_id; -}; - -struct vmw_user_stream { - struct ttm_base_object base; - struct vmw_stream stream; -}; - - -static uint64_t vmw_user_stream_size; - -static const struct vmw_res_func vmw_stream_func = { - .res_type = vmw_res_stream, - .needs_backup = false, - .may_evict = false, - .type_name = "video streams", - .backup_placement = NULL, - .create = NULL, - .destroy = NULL, - .bind = NULL, - .unbind = NULL -}; - static inline struct vmw_dma_buffer * vmw_dma_buffer(struct ttm_buffer_object *bo) { @@ -259,24 +234,6 @@ void vmw_resource_activate(struct vmw_resource *res, write_unlock(&dev_priv->resource_lock); } -static struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv, - struct idr *idr, int id) -{ - struct vmw_resource *res; - - read_lock(&dev_priv->resource_lock); - res = idr_find(idr, id); - if (!res || !res->avail || !kref_get_unless_zero(&res->kref)) - res = NULL; - - read_unlock(&dev_priv->resource_lock); - - if (unlikely(res == NULL)) - return NULL; - - return res; -} - /** * vmw_user_resource_lookup_handle - lookup a struct resource from a * TTM user-space handle and perform basic type checks @@ -776,217 +733,6 @@ int vmw_user_dmabuf_reference(struct ttm_object_file *tfile, TTM_REF_USAGE, NULL); } -/* - * Stream management - */ - -static void vmw_stream_destroy(struct vmw_resource *res) -{ - struct vmw_private *dev_priv = res->dev_priv; - struct vmw_stream *stream; - int ret; - - DRM_INFO("%s: unref\n", __func__); - stream = container_of(res, struct vmw_stream, res); - - ret = vmw_overlay_unref(dev_priv, stream->stream_id); - WARN_ON(ret != 0); -} - -static int vmw_stream_init(struct vmw_private *dev_priv, - struct vmw_stream *stream, - void (*res_free) (struct vmw_resource *res)) -{ - struct vmw_resource *res = &stream->res; - int ret; - - ret = vmw_resource_init(dev_priv, res, false, res_free, - &vmw_stream_func); - - if (unlikely(ret != 0)) { - if (res_free == NULL) - kfree(stream); - else - res_free(&stream->res); - return ret; - } - - ret = vmw_overlay_claim(dev_priv, &stream->stream_id); - if (ret) { - vmw_resource_unreference(&res); - return ret; - } - - DRM_INFO("%s: claimed\n", __func__); - - vmw_resource_activate(&stream->res, vmw_stream_destroy); - return 0; -} - -static void vmw_user_stream_free(struct vmw_resource *res) -{ - struct vmw_user_stream *stream = - container_of(res, struct vmw_user_stream, stream.res); - struct vmw_private *dev_priv = res->dev_priv; - - ttm_base_object_kfree(stream, base); - ttm_mem_global_free(vmw_mem_glob(dev_priv), - vmw_user_stream_size); -} - -/** - * This function is called when user space has no more references on the - * base object. It releases the base-object's reference on the resource object. - */ - -static void vmw_user_stream_base_release(struct ttm_base_object **p_base) -{ - struct ttm_base_object *base = *p_base; - struct vmw_user_stream *stream = - container_of(base, struct vmw_user_stream, base); - struct vmw_resource *res = &stream->stream.res; - - *p_base = NULL; - vmw_resource_unreference(&res); -} - -int vmw_stream_unref_ioctl(struct drm_device *dev, void *data, - struct drm_file *file_priv) -{ - struct vmw_private *dev_priv = vmw_priv(dev); - struct vmw_resource *res; - struct vmw_user_stream *stream; - struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; - struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; - struct idr *idr = &dev_priv->res_idr[vmw_res_stream]; - int ret = 0; - - - res = vmw_resource_lookup(dev_priv, idr, arg->stream_id); - if (unlikely(res == NULL)) - return -EINVAL; - - if (res->res_free != &vmw_user_stream_free) { - ret = -EINVAL; - goto out; - } - - stream = container_of(res, struct vmw_user_stream, stream.res); - if (stream->base.tfile != tfile) { - ret = -EINVAL; - goto out; - } - - ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE); -out: - vmw_resource_unreference(&res); - return ret; -} - -int vmw_stream_claim_ioctl(struct drm_device *dev, void *data, - struct drm_file *file_priv) -{ - struct vmw_private *dev_priv = vmw_priv(dev); - struct vmw_user_stream *stream; - struct vmw_resource *res; - struct vmw_resource *tmp; - struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; - struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; - int ret; - - /* - * Approximate idr memory usage with 128 bytes. It will be limited - * by maximum number_of streams anyway? - */ - - if (unlikely(vmw_user_stream_size == 0)) - vmw_user_stream_size = ttm_round_pot(sizeof(*stream)) + 128; - - ret = ttm_read_lock(&dev_priv->reservation_sem, true); - if (unlikely(ret != 0)) - return ret; - - ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), - vmw_user_stream_size, - false, true); - ttm_read_unlock(&dev_priv->reservation_sem); - if (unlikely(ret != 0)) { - if (ret != -ERESTARTSYS) - DRM_ERROR("Out of graphics memory for stream" - " creation.\n"); - - goto out_ret; - } - - stream = kmalloc(sizeof(*stream), GFP_KERNEL); - if (unlikely(stream == NULL)) { - ttm_mem_global_free(vmw_mem_glob(dev_priv), - vmw_user_stream_size); - ret = -ENOMEM; - goto out_ret; - } - - res = &stream->stream.res; - stream->base.shareable = false; - stream->base.tfile = NULL; - - /* - * From here on, the destructor takes over resource freeing. - */ - - ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free); - if (unlikely(ret != 0)) - goto out_ret; - - tmp = vmw_resource_reference(res); - ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM, - &vmw_user_stream_base_release, NULL); - - if (unlikely(ret != 0)) { - vmw_resource_unreference(&tmp); - goto out_err; - } - - arg->stream_id = res->id; -out_err: - vmw_resource_unreference(&res); -out_ret: - return ret; -} - -int vmw_user_stream_lookup(struct vmw_private *dev_priv, - struct ttm_object_file *tfile, - uint32_t *inout_id, struct vmw_resource **out) -{ - struct vmw_user_stream *stream; - struct vmw_resource *res; - int ret; - - res = vmw_resource_lookup(dev_priv, &dev_priv->res_idr[vmw_res_stream], - *inout_id); - if (unlikely(res == NULL)) - return -EINVAL; - - if (res->res_free != &vmw_user_stream_free) { - ret = -EINVAL; - goto err_ref; - } - - stream = container_of(res, struct vmw_user_stream, stream.res); - if (stream->base.tfile != tfile) { - ret = -EPERM; - goto err_ref; - } - - *inout_id = stream->stream.stream_id; - *out = res; - return 0; -err_ref: - vmw_resource_unreference(&res); - return ret; -} - - /** * vmw_dumb_create - Create a dumb kms buffer * diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_va.c b/drivers/gpu/drm/vmwgfx/vmwgfx_va.c new file mode 100644 index 000000000000..b4162fd78600 --- /dev/null +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_va.c @@ -0,0 +1,168 @@ +/************************************************************************** + * + * Copyright © 2012-2016 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" + +/** + * struct vmw_stream - Overlay stream simple resource. + * @sres: The simple resource we derive from. + * @stream_id: The overlay stream id. + */ +struct vmw_stream { + struct vmw_simple_resource sres; + u32 stream_id; +}; + +/** + * vmw_stream - Typecast a struct vmw_resource to a struct vmw_stream. + * @res: Pointer to the struct vmw_resource. + * + * Returns: Returns a pointer to the struct vmw_stream. + */ +static struct vmw_stream * +vmw_stream(struct vmw_resource *res) +{ + return container_of(res, struct vmw_stream, sres.res); +} + +/*************************************************************************** + * Simple resource callbacks for struct vmw_stream + **************************************************************************/ +static void vmw_stream_hw_destroy(struct vmw_resource *res) +{ + struct vmw_private *dev_priv = res->dev_priv; + struct vmw_stream *stream = vmw_stream(res); + int ret; + + ret = vmw_overlay_unref(dev_priv, stream->stream_id); + WARN_ON_ONCE(ret != 0); +} + +static int vmw_stream_init(struct vmw_resource *res, void *data) +{ + struct vmw_stream *stream = vmw_stream(res); + + return vmw_overlay_claim(res->dev_priv, &stream->stream_id); +} + +static void vmw_stream_set_arg_handle(void *data, u32 handle) +{ + struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; + + arg->stream_id = handle; +} + +static const struct vmw_simple_resource_func va_stream_func = { + .res_func = { + .res_type = vmw_res_stream, + .needs_backup = false, + .may_evict = false, + .type_name = "overlay stream", + .backup_placement = NULL, + .create = NULL, + .destroy = NULL, + .bind = NULL, + .unbind = NULL + }, + .ttm_res_type = VMW_RES_STREAM, + .size = sizeof(struct vmw_stream), + .init = vmw_stream_init, + .hw_destroy = vmw_stream_hw_destroy, + .set_arg_handle = vmw_stream_set_arg_handle, +}; + +/*************************************************************************** + * End simple resource callbacks for struct vmw_stream + **************************************************************************/ + +/** + * vmw_stream_unref_ioctl - Ioctl to unreference a user-space handle to + * a struct vmw_stream. + * @dev: Pointer to the drm device. + * @data: The ioctl argument + * @file_priv: Pointer to a struct drm_file identifying the caller. + * + * Return: + * 0 if successful. + * Negative error value on failure. + */ +int vmw_stream_unref_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; + + return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, + arg->stream_id, TTM_REF_USAGE); +} + +/** + * vmw_stream_claim_ioctl - Ioctl to claim a struct vmw_stream overlay. + * @dev: Pointer to the drm device. + * @data: The ioctl argument + * @file_priv: Pointer to a struct drm_file identifying the caller. + * + * Return: + * 0 if successful. + * Negative error value on failure. + */ +int vmw_stream_claim_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + return vmw_simple_resource_create_ioctl(dev, data, file_priv, + &va_stream_func); +} + +/** + * vmw_user_stream_lookup - Look up a struct vmw_user_stream from a handle. + * @dev_priv: Pointer to a struct vmw_private. + * @tfile: struct ttm_object_file identifying the caller. + * @inout_id: In: The user-space handle. Out: The stream id. + * @out: On output contains a refcounted pointer to the embedded + * struct vmw_resource. + * + * Return: + * 0 if successful. + * Negative error value on failure. + */ +int vmw_user_stream_lookup(struct vmw_private *dev_priv, + struct ttm_object_file *tfile, + uint32_t *inout_id, struct vmw_resource **out) +{ + struct vmw_stream *stream; + struct vmw_resource *res = + vmw_simple_resource_lookup(tfile, *inout_id, &va_stream_func); + + if (IS_ERR(res)) + return PTR_ERR(res); + + stream = vmw_stream(res); + *inout_id = stream->stream_id; + *out = res; + + return 0; +} -- 2.45.2