/**************************************************************************
*
* Copyright © 2009 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_drm.h"
#include "ttm/ttm_object.h"
#include "ttm/ttm_placement.h"
#include "drmP.h"
#define VMW_RES_CONTEXT ttm_driver_type0
#define VMW_RES_SURFACE ttm_driver_type1
#define VMW_RES_STREAM ttm_driver_type2
/* XXX: This isn't a real hardware flag, but just a hack for kernel to
* know about primary surfaces. Find a better way to accomplish this.
*/
#define SVGA3D_SURFACE_HINT_SCANOUT (1 << 9)
struct vmw_user_context {
struct ttm_base_object base;
struct vmw_resource res;
};
struct vmw_user_surface {
struct ttm_base_object base;
struct vmw_surface srf;
};
struct vmw_user_dma_buffer {
struct ttm_base_object base;
struct vmw_dma_buffer dma;
};
struct vmw_bo_user_rep {
uint32_t handle;
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 inline struct vmw_dma_buffer *
vmw_dma_buffer(struct ttm_buffer_object *bo)
{
return container_of(bo, struct vmw_dma_buffer, base);
}
static inline struct vmw_user_dma_buffer *
vmw_user_dma_buffer(struct ttm_buffer_object *bo)
{
struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
return container_of(vmw_bo, struct vmw_user_dma_buffer, dma);
}
struct vmw_resource *vmw_resource_reference(struct vmw_resource *res)
{
kref_get(&res->kref);
return res;
}
static void vmw_resource_release(struct kref *kref)
{
struct vmw_resource *res =
container_of(kref, struct vmw_resource, kref);
struct vmw_private *dev_priv = res->dev_priv;
idr_remove(res->idr, res->id);
write_unlock(&dev_priv->resource_lock);
if (likely(res->hw_destroy != NULL))
res->hw_destroy(res);
if (res->res_free != NULL)
res->res_free(res);
else
kfree(res);
write_lock(&dev_priv->resource_lock);
}
void vmw_resource_unreference(struct vmw_resource **p_res)
{
struct vmw_resource *res = *p_res;
struct vmw_private *dev_priv = res->dev_priv;
*p_res = NULL;
write_lock(&dev_priv->resource_lock);
kref_put(&res->kref, vmw_resource_release);
write_unlock(&dev_priv->resource_lock);
}
static int vmw_resource_init(struct vmw_private *dev_priv,
struct vmw_resource *res,
struct idr *idr,
enum ttm_object_type obj_type,
void (*res_free) (struct vmw_resource *res))
{
int ret;
kref_init(&res->kref);
res->hw_destroy = NULL;
res->res_free = res_free;
res->res_type = obj_type;
res->idr = idr;
res->avail = false;
res->dev_priv = dev_priv;
do {
if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0))
return -ENOMEM;
write_lock(&dev_priv->resource_lock);
ret = idr_get_new_above(idr, res, 1, &res->id);
write_unlock(&dev_priv->resource_lock);
} while (ret == -EAGAIN);
return ret;
}
/**
* vmw_resource_activate
*
* @res: Pointer to the newly created resource
* @hw_destroy: Destroy function. NULL if none.
*
* Activate a resource after the hardware has been made aware of it.
* Set tye destroy function to @destroy. Typically this frees the
* resource and destroys the hardware resources associated with it.
* Activate basically means that the function vmw_resource_lookup will
* find it.
*/
static void vmw_resource_activate(struct vmw_resource *res,
void (*hw_destroy) (struct vmw_resource *))
{
struct vmw_private *dev_priv = res->dev_priv;
write_lock(&dev_priv->resource_lock);
res->avail = true;
res->hw_destroy = hw_destroy;
write_unlock(&dev_priv->resource_lock);
}
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(&res->kref);
else
res = NULL;
read_unlock(&dev_priv->resource_lock);
if (unlikely(res == NULL))
return NULL;
return res;
}
/**
* Context management:
*/
static void vmw_hw_context_destroy(struct vmw_resource *res)
{
struct vmw_private *dev_priv = res->dev_priv;
struct {
SVGA3dCmdHeader header;
SVGA3dCmdDestroyContext body;
} *cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
if (unlikely(cmd == NULL)) {
DRM_ERROR("Failed reserving FIFO space for surface "
"destruction.\n");
return;
}
cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DESTROY);
cmd->header.size = cpu_to_le32(sizeof(cmd->body));
cmd->body.cid = cpu_to_le32(res->id);
vmw_fifo_commit(dev_priv, sizeof(*cmd));
}
static int vmw_context_init(struct vmw_private *dev_priv,
struct vmw_resource *res,
void (*res_free) (struct vmw_resource *res))
{
int ret;
struct {
SVGA3dCmdHeader header;
SVGA3dCmdDefineContext body;
} *cmd;
ret = vmw_resource_init(dev_priv, res, &dev_priv->context_idr,
VMW_RES_CONTEXT, res_free);
if (unlikely(ret != 0)) {
if (res_free == NULL)
kfree(res);
else
res_free(res);
return ret;
}
cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
if (unlikely(cmd == NULL)) {
DRM_ERROR("Fifo reserve failed.\n");
vmw_resource_unreference(&res);
return -ENOMEM;
}
cmd->header.id = cpu_to_le32(SVGA_3D_CMD_CONTEXT_DEFINE);
cmd->header.size = cpu_to_le32(sizeof(cmd->body));
cmd->body.cid = cpu_to_le32(res->id);
vmw_fifo_commit(dev_priv, sizeof(*cmd));
vmw_resource_activate(res, vmw_hw_context_destroy);
return 0;
}
struct vmw_resource *vmw_context_alloc(struct vmw_private *dev_priv)
{
struct vmw_resource *res = kmalloc(sizeof(*res), GFP_KERNEL);
int ret;
if (unlikely(res == NULL))
return NULL;
ret = vmw_context_init(dev_priv, res, NULL);
return (ret == 0) ? res : NULL;
}
/**
* User-space context management:
*/
static void vmw_user_context_free(struct vmw_resource *res)
{
struct vmw_user_context *ctx =
container_of(res, struct vmw_user_context, res);
kfree(ctx);
}
/**
* 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_context_base_release(struct ttm_base_object **p_base)
{
struct ttm_base_object *base = *p_base;
struct vmw_user_context *ctx =
container_of(base, struct vmw_user_context, base);
struct vmw_resource *res = &ctx->res;
*p_base = NULL;
vmw_resource_unreference(&res);
}
int vmw_context_destroy_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_context *ctx;
struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
int ret = 0;
res = vmw_resource_lookup(dev_priv, &dev_priv->context_idr, arg->cid);
if (unlikely(res == NULL))
return -EINVAL;
if (res->res_free != &vmw_user_context_free) {
ret = -EINVAL;
goto out;
}
ctx = container_of(res, struct vmw_user_context, res);
if (ctx->base.tfile != tfile && !ctx->base.shareable) {
ret = -EPERM;
goto out;
}
ttm_ref_object_base_unref(tfile, ctx->base.hash.key, TTM_REF_USAGE);
out:
vmw_resource_unreference(&res);
return ret;
}
int vmw_context_define_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct vmw_private *dev_priv = vmw_priv(dev);
struct vmw_user_context *ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
struct vmw_resource *res;
struct vmw_resource *tmp;
struct drm_vmw_context_arg *arg = (struct drm_vmw_context_arg *)data;
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
int ret;
if (unlikely(ctx == NULL))
return -ENOMEM;
res = &ctx->res;
ctx->base.shareable = false;
ctx->base.tfile = NULL;
ret = vmw_context_init(dev_priv, res, vmw_user_context_free);
if (unlikely(ret != 0))
return ret;
tmp = vmw_resource_reference(&ctx->res);
ret = ttm_base_object_init(tfile, &ctx->base, false, VMW_RES_CONTEXT,
&vmw_user_context_base_release, NULL);
if (unlikely(ret != 0)) {
vmw_resource_unreference(&tmp);
goto out_err;
}
arg->cid = res->id;
out_err:
vmw_resource_unreference(&res);
return ret;
}
int vmw_context_check(struct vmw_private *dev_priv,
struct ttm_object_file *tfile,
int id)
{
struct vmw_resource *res;
int ret = 0;
read_lock(&dev_priv->resource_lock);
res = idr_find(&dev_priv->context_idr, id);
if (res && res->avail) {
struct vmw_user_context *ctx =
container_of(res, struct vmw_user_context, res);
if (ctx->base.tfile != tfile && !ctx->base.shareable)
ret = -EPERM;
} else
ret = -EINVAL;
read_unlock(&dev_priv->resource_lock);
return ret;
}
/**
* Surface management.
*/
static void vmw_hw_surface_destroy(struct vmw_resource *res)
{
struct vmw_private *dev_priv = res->dev_priv;
struct {
SVGA3dCmdHeader header;
SVGA3dCmdDestroySurface body;
} *cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
if (unlikely(cmd == NULL)) {
DRM_ERROR("Failed reserving FIFO space for surface "
"destruction.\n");
return;
}
cmd->header.id = cpu_to_le32(SVGA_3D_CMD_SURFACE_DESTROY);
cmd->header.size = cpu_to_le32(sizeof(cmd->body));
cmd->body.sid = cpu_to_le32(res->id);
vmw_fifo_commit(dev_priv, sizeof(*cmd));
}
void vmw_surface_res_free(struct vmw_resource *res)
{
struct vmw_surface *srf = container_of(res, struct vmw_surface, res);
kfree(srf->sizes);
kfree(srf->snooper.image);
kfree(srf);
}
int vmw_surface_init(struct vmw_private *dev_priv,
struct vmw_surface *srf,
void (*res_free) (struct vmw_resource *res))
{
int ret;
struct {
SVGA3dCmdHeader header;
SVGA3dCmdDefineSurface body;
} *cmd;
SVGA3dSize *cmd_size;
struct vmw_resource *res = &srf->res;
struct drm_vmw_size *src_size;
size_t submit_size;
uint32_t cmd_len;
int i;
BUG_ON(res_free == NULL);
ret = vmw_resource_init(dev_priv, res, &dev_priv->surface_idr,
VMW_RES_SURFACE, res_free);
if (unlikely(ret != 0)) {
res_free(res);
return ret;
}
submit_size = sizeof(*cmd) + srf->num_sizes * sizeof(SVGA3dSize);
cmd_len = sizeof(cmd->body) + srf->num_sizes * sizeof(SVGA3dSize);
cmd = vmw_fifo_reserve(dev_priv, submit_size);
if (unlikely(cmd == NULL)) {
DRM_ERROR("Fifo reserve failed for create surface.\n");
vmw_resource_unreference(&res);
return -ENOMEM;
}
cmd->header.id = cpu_to_le32(SVGA_3D_CMD_SURFACE_DEFINE);
cmd->header.size = cpu_to_le32(cmd_len);
cmd->body.sid = cpu_to_le32(res->id);
cmd->body.surfaceFlags = cpu_to_le32(srf->flags);
cmd->body.format = cpu_to_le32(srf->format);
for (i = 0; i < DRM_VMW_MAX_SURFACE_FACES; ++i) {
cmd->body.face[i].numMipLevels =
cpu_to_le32(srf->mip_levels[i]);
}
cmd += 1;
cmd_size = (SVGA3dSize *) cmd;
src_size = srf->sizes;
for (i = 0; i < srf->num_sizes; ++i, cmd_size++, src_size++) {
cmd_size->width = cpu_to_le32(src_size->width);
cmd_size->height = cpu_to_le32(src_size->height);
cmd_size->depth = cpu_to_le32(src_size->depth);
}
vmw_fifo_commit(dev_priv, submit_size);
vmw_resource_activate(res, vmw_hw_surface_destroy);
return 0;
}
static void vmw_user_surface_free(struct vmw_resource *res)
{
struct vmw_surface *srf = container_of(res, struct vmw_surface, res);
struct vmw_user_surface *user_srf =
container_of(srf, struct vmw_user_surface, srf);
kfree(srf->sizes);
kfree(srf->snooper.image);
kfree(user_srf);
}
int vmw_user_surface_lookup_handle(struct vmw_private *dev_priv,
struct ttm_object_file *tfile,
uint32_t handle, struct vmw_surface **out)
{
struct vmw_resource *res;
struct vmw_surface *srf;
struct vmw_user_surface *user_srf;
struct ttm_base_object *base;
int ret = -EINVAL;
base = ttm_base_object_lookup(tfile, handle);
if (unlikely(base == NULL))
return -EINVAL;
if (unlikely(base->object_type != VMW_RES_SURFACE))
goto out_bad_resource;
user_srf = container_of(base, struct vmw_user_surface, base);
srf = &user_srf->srf;
res = &srf->res;
read_lock(&dev_priv->resource_lock);
if (!res->avail || res->res_free != &vmw_user_surface_free) {
read_unlock(&dev_priv->resource_lock);
goto out_bad_resource;
}
kref_get(&res->kref);
read_unlock(&dev_priv->resource_lock);
*out = srf;
ret = 0;
out_bad_resource:
ttm_base_object_unref(&base);
return ret;
}
static void vmw_user_surface_base_release(struct ttm_base_object **p_base)
{
struct ttm_base_object *base = *p_base;
struct vmw_user_surface *user_srf =
container_of(base, struct vmw_user_surface, base);
struct vmw_resource *res = &user_srf->srf.res;
*p_base = NULL;
vmw_resource_unreference(&res);
}
int vmw_surface_destroy_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_vmw_surface_arg *arg = (struct drm_vmw_surface_arg *)data;
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
return ttm_ref_object_base_unref(tfile, arg->sid, TTM_REF_USAGE);
}
int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct vmw_private *dev_priv = vmw_priv(dev);
struct vmw_user_surface *user_srf =
kmalloc(sizeof(*user_srf), GFP_KERNEL);
struct vmw_surface *srf;
struct vmw_resource *res;
struct vmw_resource *tmp;
union drm_vmw_surface_create_arg *arg =
(union drm_vmw_surface_create_arg *)data;
struct drm_vmw_surface_create_req *req = &arg->req;
struct drm_vmw_surface_arg *rep = &arg->rep;
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
struct drm_vmw_size __user *user_sizes;
int ret;
int i;
if (unlikely(user_srf == NULL))
return -ENOMEM;
srf = &user_srf->srf;
res = &srf->res;
srf->flags = req->flags;
srf->format = req->format;
memcpy(srf->mip_levels, req->mip_levels, sizeof(srf->mip_levels));
srf->num_sizes = 0;
for (i = 0; i < DRM_VMW_MAX_SURFACE_FACES; ++i)
srf->num_sizes += srf->mip_levels[i];
if (srf->num_sizes > DRM_VMW_MAX_SURFACE_FACES *
DRM_VMW_MAX_MIP_LEVELS) {
ret = -EINVAL;
goto out_err0;
}
srf->sizes = kmalloc(srf->num_sizes * sizeof(*srf->sizes), GFP_KERNEL);
if (unlikely(srf->sizes == NULL)) {
ret = -ENOMEM;
goto out_err0;
}
user_sizes = (struct drm_vmw_size __user *)(unsigned long)
req->size_addr;
ret = copy_from_user(srf->sizes, user_sizes,
srf->num_sizes * sizeof(*srf->sizes));
if (unlikely(ret != 0))
goto out_err1;
if (srf->flags & SVGA3D_SURFACE_HINT_SCANOUT) {
/* we should not send this flag down to hardware since
* its not a official one
*/
srf->flags &= ~SVGA3D_SURFACE_HINT_SCANOUT;
srf->scanout = true;
} else {
srf->scanout = false;
}
if (srf->scanout &&
srf->num_sizes == 1 &&
srf->sizes[0].width == 64 &&
srf->sizes[0].height == 64 &&
srf->format == SVGA3D_A8R8G8B8) {
srf->snooper.image = kmalloc(64 * 64 * 4, GFP_KERNEL);
/* clear the image */
if (srf->snooper.image) {
memset(srf->snooper.image, 0x00, 64 * 64 * 4);
} else {
DRM_ERROR("Failed to allocate cursor_image\n");
ret = -ENOMEM;
goto out_err1;
}
} else {
srf->snooper.image = NULL;
}
srf->snooper.crtc = NULL;
user_srf->base.shareable = false;
user_srf->base.tfile = NULL;
/**
* From this point, the generic resource management functions
* destroy the object on failure.
*/
ret = vmw_surface_init(dev_priv, srf, vmw_user_surface_free);
if (unlikely(ret != 0))
return ret;
tmp = vmw_resource_reference(&srf->res);
ret = ttm_base_object_init(tfile, &user_srf->base,
req->shareable, VMW_RES_SURFACE,
&vmw_user_surface_base_release, NULL);
if (unlikely(ret != 0)) {
vmw_resource_unreference(&tmp);
vmw_resource_unreference(&res);
return ret;
}
rep->sid = user_srf->base.hash.key;
if (rep->sid == SVGA3D_INVALID_ID)
DRM_ERROR("Created bad Surface ID.\n");
vmw_resource_unreference(&res);
return 0;
out_err1:
kfree(srf->sizes);
out_err0:
kfree(user_srf);
return ret;
}
int vmw_surface_reference_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
union drm_vmw_surface_reference_arg *arg =
(union drm_vmw_surface_reference_arg *)data;
struct drm_vmw_surface_arg *req = &arg->req;
struct drm_vmw_surface_create_req *rep = &arg->rep;
struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
struct vmw_surface *srf;
struct vmw_user_surface *user_srf;
struct drm_vmw_size __user *user_sizes;
struct ttm_base_object *base;
int ret = -EINVAL;
base = ttm_base_object_lookup(tfile, req->sid);
if (unlikely(base == NULL)) {
DRM_ERROR("Could not find surface to reference.\n");
return -EINVAL;
}
if (unlikely(base->object_type != VMW_RES_SURFACE))
goto out_bad_resource;
user_srf = container_of(base, struct vmw_user_surface, base);
srf = &user_srf->srf;
ret = ttm_ref_object_add(tfile, &user_srf->base, TTM_REF_USAGE, NULL);
if (unlikely(ret != 0)) {
DRM_ERROR("Could not add a reference to a surface.\n");
goto out_no_reference;
}
rep->flags = srf->flags;
rep->format = srf->format;
memcpy(rep->mip_levels, srf->mip_levels, sizeof(srf->mip_levels));
user_sizes = (struct drm_vmw_size __user *)(unsigned long)
rep->size_addr;
if (user_sizes)
ret = copy_to_user(user_sizes, srf->sizes,
srf->num_sizes * sizeof(*srf->sizes));
if (unlikely(ret != 0))
DRM_ERROR("copy_to_user failed %p %u\n",
user_sizes, srf->num_sizes);
out_bad_resource:
out_no_reference:
ttm_base_object_unref(&base);
return ret;
}
int vmw_surface_check(struct vmw_private *dev_priv,
struct ttm_object_file *tfile,
uint32_t handle, int *id)
{
struct ttm_base_object *base;
struct vmw_user_surface *user_srf;
int ret = -EPERM;
base = ttm_base_object_lookup(tfile, handle);
if (unlikely(base == NULL))
return -EINVAL;
if (unlikely(base->object_type != VMW_RES_SURFACE))
goto out_bad_surface;
user_srf = container_of(base, struct vmw_user_surface, base);
*id = user_srf->srf.res.id;
ret = 0;
out_bad_surface:
/**
* FIXME: May deadlock here when called from the
* command parsing code.
*/
ttm_base_object_unref(&base);
return ret;
}
/**
* Buffer management.
*/
static size_t vmw_dmabuf_acc_size(struct ttm_bo_global *glob,
unsigned long num_pages)
{
static size_t bo_user_size = ~0;
size_t page_array_size =
(num_pages * sizeof(void *) + PAGE_SIZE - 1) & PAGE_MASK;
if (unlikely(bo_user_size == ~0)) {
bo_user_size = glob->ttm_bo_extra_size +
ttm_round_pot(sizeof(struct vmw_dma_buffer));
}
return bo_user_size + page_array_size;
}
void vmw_dmabuf_gmr_unbind(struct ttm_buffer_object *bo)
{
struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
struct ttm_bo_global *glob = bo->glob;
struct vmw_private *dev_priv =
container_of(bo->bdev, struct vmw_private, bdev);
if (vmw_bo->gmr_bound) {
vmw_gmr_unbind(dev_priv, vmw_bo->gmr_id);
spin_lock(&glob->lru_lock);
ida_remove(&dev_priv->gmr_ida, vmw_bo->gmr_id);
spin_unlock(&glob->lru_lock);
vmw_bo->gmr_bound = false;
}
}
void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo)
{
struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
struct ttm_bo_global *glob = bo->glob;
vmw_dmabuf_gmr_unbind(bo);
ttm_mem_global_free(glob->mem_glob, bo->acc_size);
kfree(vmw_bo);
}
int vmw_dmabuf_init(struct vmw_private *dev_priv,
struct vmw_dma_buffer *vmw_bo,
size_t size, struct ttm_placement *placement,
bool interruptible,
void (*bo_free) (struct ttm_buffer_object *bo))
{
struct ttm_bo_device *bdev = &dev_priv->bdev;
struct ttm_mem_global *mem_glob = bdev->glob->mem_glob;
size_t acc_size;
int ret;
BUG_ON(!bo_free);
acc_size =
vmw_dmabuf_acc_size(bdev->glob,
(size + PAGE_SIZE - 1) >> PAGE_SHIFT);
ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false);
if (unlikely(ret != 0)) {
/* we must free the bo here as
* ttm_buffer_object_init does so as well */
bo_free(&vmw_bo->base);
return ret;
}
memset(vmw_bo, 0, sizeof(*vmw_bo));
INIT_LIST_HEAD(&vmw_bo->gmr_lru);
INIT_LIST_HEAD(&vmw_bo->validate_list);
vmw_bo->gmr_id = 0;
vmw_bo->gmr_bound = false;
ret = ttm_bo_init(bdev, &vmw_bo->base, size,
ttm_bo_type_device, placement,
0, 0, interruptible,
NULL, acc_size, bo_free);
return ret;
}
static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo)
{
struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo);
struct ttm_bo_global *glob = bo->glob;
vmw_dmabuf_gmr_unbind(bo);
ttm_mem_global_free(glob->mem_glob, bo->acc_size);
kfree(vmw_user_bo);
}
static void vmw_user_dmabuf_release(struct ttm_base_object **p_base)
{
struct vmw_user_dma_buffer *vmw_user_bo;
struct ttm_base_object *base = *p_base;
struct ttm_buffer_object *bo;
*p_base = NULL;
if (unlikely(base == NULL))
return;
vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base);
bo = &vmw_user_bo->dma.base;
ttm_bo_unref(&bo);
}
int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct vmw_private *dev_priv = vmw_priv(dev);
union drm_vmw_alloc_dmabuf_arg *arg =
(union drm_vmw_alloc_dmabuf_arg *)data;
struct drm_vmw_alloc_dmabuf_req *req = &arg->req;
struct drm_vmw_dmabuf_rep *rep = &arg->rep;
struct vmw_user_dma_buffer *vmw_user_bo;
struct ttm_buffer_object *tmp;
struct vmw_master *vmaster = vmw_master(file_priv->master);
int ret;
vmw_user_bo = kzalloc(sizeof(*vmw_user_bo), GFP_KERNEL);
if (unlikely(vmw_user_bo == NULL))
return -ENOMEM;
ret = ttm_read_lock(&vmaster->lock, true);
if (unlikely(ret != 0)) {
kfree(vmw_user_bo);
return ret;
}
ret = vmw_dmabuf_init(dev_priv, &vmw_user_bo->dma, req->size,
&vmw_vram_sys_placement, true,
&vmw_user_dmabuf_destroy);
if (unlikely(ret != 0))
return ret;
tmp = ttm_bo_reference(&vmw_user_bo->dma.base);
ret = ttm_base_object_init(vmw_fpriv(file_priv)->tfile,
&vmw_user_bo->base,
false,
ttm_buffer_type,
&vmw_user_dmabuf_release, NULL);
if (unlikely(ret != 0)) {
ttm_bo_unref(&tmp);
} else {
rep->handle = vmw_user_bo->base.hash.key;
rep->map_handle = vmw_user_bo->dma.base.addr_space_offset;
rep->cur_gmr_id = vmw_user_bo->base.hash.key;
rep->cur_gmr_offset = 0;
}
ttm_bo_unref(&tmp);
ttm_read_unlock(&vmaster->lock);
return 0;
}
int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_vmw_unref_dmabuf_arg *arg =
(struct drm_vmw_unref_dmabuf_arg *)data;
return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
arg->handle,
TTM_REF_USAGE);
}
uint32_t vmw_dmabuf_validate_node(struct ttm_buffer_object *bo,
uint32_t cur_validate_node)
{
struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
if (likely(vmw_bo->on_validate_list))
return vmw_bo->cur_validate_node;
vmw_bo->cur_validate_node = cur_validate_node;
vmw_bo->on_validate_list = true;
return cur_validate_node;
}
void vmw_dmabuf_validate_clear(struct ttm_buffer_object *bo)
{
struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
vmw_bo->on_validate_list = false;
}
uint32_t vmw_dmabuf_gmr(struct ttm_buffer_object *bo)
{
struct vmw_dma_buffer *vmw_bo;
if (bo->mem.mem_type == TTM_PL_VRAM)
return SVGA_GMR_FRAMEBUFFER;
vmw_bo = vmw_dma_buffer(bo);
return (vmw_bo->gmr_bound) ? vmw_bo->gmr_id : SVGA_GMR_NULL;
}
void vmw_dmabuf_set_gmr(struct ttm_buffer_object *bo, uint32_t id)
{
struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo);
vmw_bo->gmr_bound = true;
vmw_bo->gmr_id = id;
}
int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile,
uint32_t handle, struct vmw_dma_buffer **out)
{
struct vmw_user_dma_buffer *vmw_user_bo;
struct ttm_base_object *base;
base = ttm_base_object_lookup(tfile, handle);
if (unlikely(base == NULL)) {
printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
(unsigned long)handle);
return -ESRCH;
}
if (unlikely(base->object_type != ttm_buffer_type)) {
ttm_base_object_unref(&base);
printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n",
(unsigned long)handle);
return -EINVAL;
}
vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, base);
(void)ttm_bo_reference(&vmw_user_bo->dma.base);
ttm_base_object_unref(&base);
*out = &vmw_user_bo->dma;
return 0;
}
/**
* TODO: Implement a gmr id eviction mechanism. Currently we just fail
* when we're out of ids, causing GMR space to be allocated
* out of VRAM.
*/
int vmw_gmr_id_alloc(struct vmw_private *dev_priv, uint32_t *p_id)
{
struct ttm_bo_global *glob = dev_priv->bdev.glob;
int id;
int ret;
do {
if (unlikely(ida_pre_get(&dev_priv->gmr_ida, GFP_KERNEL) == 0))
return -ENOMEM;
spin_lock(&glob->lru_lock);
ret = ida_get_new(&dev_priv->gmr_ida, &id);
spin_unlock(&glob->lru_lock);
} while (ret == -EAGAIN);
if (unlikely(ret != 0))
return ret;
if (unlikely(id >= dev_priv->max_gmr_ids)) {
spin_lock(&glob->lru_lock);
ida_remove(&dev_priv->gmr_ida, id);
spin_unlock(&glob->lru_lock);
return -EBUSY;
}
*p_id = (uint32_t) id;
return 0;
}
/*
* Stream managment
*/
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, &dev_priv->stream_idr,
VMW_RES_STREAM, res_free);
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;
}
/**
* User-space context management:
*/
static void vmw_user_stream_free(struct vmw_resource *res)
{
struct vmw_user_stream *stream =
container_of(res, struct vmw_user_stream, stream.res);
kfree(stream);
}
/**
* 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;
int ret = 0;
res = vmw_resource_lookup(dev_priv, &dev_priv->stream_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 = kmalloc(sizeof(*stream), GFP_KERNEL);
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;
if (unlikely(stream == NULL))
return -ENOMEM;
res = &stream->stream.res;
stream->base.shareable = false;
stream->base.tfile = NULL;
ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free);
if (unlikely(ret != 0))
return 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);
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->stream_idr, *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;
}
