static void render_state_free(struct i915_render_state *so)
{
kunmap(so->batch);
i915_gem_object_ggtt_unpin(so->obj);
drm_gem_object_unreference(&so->obj->base);
kfree(so);
}
static int intelfb_alloc(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct intel_fbdev *ifbdev =
container_of(helper, struct intel_fbdev, helper);
struct drm_framebuffer *fb;
struct drm_device *dev = helper->dev;
struct drm_mode_fb_cmd2 mode_cmd = {};
struct drm_i915_gem_object *obj;
int size, ret;
/* we don't do packed 24bpp */
if (sizes->surface_bpp == 24)
sizes->surface_bpp = 32;
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
sizes->surface_depth);
size = mode_cmd.pitches[0] * mode_cmd.height;
size = ALIGN(size, PAGE_SIZE);
obj = i915_gem_object_create_stolen(dev, size);
if (obj == NULL)
obj = i915_gem_alloc_object(dev, size);
if (!obj) {
DRM_ERROR("failed to allocate framebuffer\n");
ret = -ENOMEM;
goto out;
}
/* Flush everything out, we'll be doing GTT only from now on */
ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
if (ret) {
DRM_ERROR("failed to pin obj: %d\n", ret);
goto out_unref;
}
fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
if (IS_ERR(fb)) {
ret = PTR_ERR(fb);
goto out_unpin;
}
ifbdev->fb = to_intel_framebuffer(fb);
return 0;
out_unpin:
i915_gem_object_ggtt_unpin(obj);
out_unref:
drm_gem_object_unreference(&obj->base);
out:
return ret;
}
void i915_gem_context_fini(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_context *dctx = dev_priv->ring[RCS].default_context;
int i;
if (dctx->legacy_hw_ctx.rcs_state) {
/* The only known way to stop the gpu from accessing the hw context is
* to reset it. Do this as the very last operation to avoid confusing
* other code, leading to spurious errors. */
intel_gpu_reset(dev);
/* When default context is created and switched to, base object refcount
* will be 2 (+1 from object creation and +1 from do_switch()).
* i915_gem_context_fini() will be called after gpu_idle() has switched
* to default context. So we need to unreference the base object once
* to offset the do_switch part, so that i915_gem_context_unreference()
* can then free the base object correctly. */
WARN_ON(!dev_priv->ring[RCS].last_context);
if (dev_priv->ring[RCS].last_context == dctx) {
/* Fake switch to NULL context */
WARN_ON(dctx->legacy_hw_ctx.rcs_state->active);
i915_gem_object_ggtt_unpin(dctx->legacy_hw_ctx.rcs_state);
i915_gem_context_unreference(dctx);
dev_priv->ring[RCS].last_context = NULL;
}
i915_gem_object_ggtt_unpin(dctx->legacy_hw_ctx.rcs_state);
}
for (i = 0; i < I915_NUM_RINGS; i++) {
struct intel_engine_cs *ring = &dev_priv->ring[i];
if (ring->last_context)
i915_gem_context_unreference(ring->last_context);
ring->default_context = NULL;
ring->last_context = NULL;
}
i915_gem_context_unreference(dctx);
}
/**
* The default context needs to exist per ring that uses contexts. It stores the
* context state of the GPU for applications that don't utilize HW contexts, as
* well as an idle case.
*/
static struct intel_context *
i915_gem_create_context(struct drm_device *dev,
struct drm_i915_file_private *file_priv)
{
const bool is_global_default_ctx = file_priv == NULL;
struct intel_context *ctx;
int ret = 0;
BUG_ON(!mutex_is_locked(&dev->struct_mutex));
ctx = __create_hw_context(dev, file_priv);
if (IS_ERR(ctx))
return ctx;
if (is_global_default_ctx && ctx->legacy_hw_ctx.rcs_state) {
/* We may need to do things with the shrinker which
* require us to immediately switch back to the default
* context. This can cause a problem as pinning the
* default context also requires GTT space which may not
* be available. To avoid this we always pin the default
* context.
*/
ret = i915_gem_obj_ggtt_pin(ctx->legacy_hw_ctx.rcs_state,
get_context_alignment(dev), 0);
if (ret) {
DRM_DEBUG_DRIVER("Couldn't pin %d\n", ret);
goto err_destroy;
}
}
if (USES_FULL_PPGTT(dev)) {
struct i915_hw_ppgtt *ppgtt = i915_ppgtt_create(dev, file_priv);
if (IS_ERR_OR_NULL(ppgtt)) {
DRM_DEBUG_DRIVER("PPGTT setup failed (%ld)\n",
PTR_ERR(ppgtt));
ret = PTR_ERR(ppgtt);
goto err_unpin;
}
ctx->ppgtt = ppgtt;
}
trace_i915_context_create(ctx);
return ctx;
err_unpin:
if (is_global_default_ctx && ctx->legacy_hw_ctx.rcs_state)
i915_gem_object_ggtt_unpin(ctx->legacy_hw_ctx.rcs_state);
err_destroy:
i915_gem_context_unreference(ctx);
return ERR_PTR(ret);
}
static struct i915_render_state *render_state_alloc(struct drm_device *dev)
{
struct i915_render_state *so;
struct page *page;
int ret;
so = kzalloc(sizeof(*so), GFP_KERNEL);
if (!so)
return ERR_PTR(-ENOMEM);
so->obj = i915_gem_alloc_object(dev, 4096);
if (so->obj == NULL) {
ret = -ENOMEM;
goto free;
}
so->size = 4096;
ret = i915_gem_obj_ggtt_pin(so->obj, 4096, 0);
if (ret)
goto free_gem;
BUG_ON(so->obj->pages->nents != 1);
page = sg_page(so->obj->pages->sgl);
so->batch = kmap(page);
if (!so->batch) {
ret = -ENOMEM;
goto unpin;
}
so->ggtt_offset = i915_gem_obj_ggtt_offset(so->obj);
return so;
unpin:
i915_gem_object_ggtt_unpin(so->obj);
free_gem:
drm_gem_object_unreference(&so->obj->base);
free:
kfree(so);
return ERR_PTR(ret);
}
void i915_gem_context_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int i;
/* In execlists mode we will unreference the context when the execlist
* queue is cleared and the requests destroyed.
*/
if (i915.enable_execlists)
return;
for (i = 0; i < I915_NUM_RINGS; i++) {
struct intel_engine_cs *ring = &dev_priv->ring[i];
struct intel_context *lctx = ring->last_context;
if (lctx) {
if (lctx->legacy_hw_ctx.rcs_state && i == RCS)
i915_gem_object_ggtt_unpin(lctx->legacy_hw_ctx.rcs_state);
i915_gem_context_unreference(lctx);
ring->last_context = NULL;
}
}
}
void i915_gem_render_state_fini(struct render_state *so)
{
i915_gem_object_ggtt_unpin(so->obj);
drm_gem_object_unreference(&so->obj->base);
}
static int intelfb_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct intel_fbdev *ifbdev =
container_of(helper, struct intel_fbdev, helper);
struct intel_framebuffer *intel_fb = ifbdev->fb;
struct drm_device *dev = helper->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct fb_info *info;
struct drm_framebuffer *fb;
struct drm_i915_gem_object *obj;
int size, ret;
mutex_lock(&dev->struct_mutex);
if (!intel_fb || WARN_ON(!intel_fb->obj)) {
DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
ret = intelfb_alloc(helper, sizes);
if (ret)
goto out_unlock;
intel_fb = ifbdev->fb;
} else {
DRM_DEBUG_KMS("re-using BIOS fb\n");
sizes->fb_width = intel_fb->base.width;
sizes->fb_height = intel_fb->base.height;
}
obj = intel_fb->obj;
size = obj->base.size;
info = framebuffer_alloc(0, &dev->pdev->dev);
if (!info) {
ret = -ENOMEM;
goto out_unpin;
}
info->par = helper;
fb = &ifbdev->fb->base;
ifbdev->helper.fb = fb;
ifbdev->helper.fbdev = info;
strcpy(info->fix.id, "inteldrmfb");
info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
info->fbops = &intelfb_ops;
ret = fb_alloc_cmap(&info->cmap, 256, 0);
if (ret) {
ret = -ENOMEM;
goto out_unpin;
}
/* setup aperture base/size for vesafb takeover */
info->apertures = alloc_apertures(1);
if (!info->apertures) {
ret = -ENOMEM;
goto out_unpin;
}
info->apertures->ranges[0].base = dev->mode_config.fb_base;
info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
info->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);
info->fix.smem_len = size;
info->screen_base =
ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),
size);
if (!info->screen_base) {
ret = -ENOSPC;
goto out_unpin;
}
info->screen_size = size;
/* This driver doesn't need a VT switch to restore the mode on resume */
info->skip_vt_switch = true;
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
/* If the object is shmemfs backed, it will have given us zeroed pages.
* If the object is stolen however, it will be full of whatever
* garbage was left in there.
*/
if (ifbdev->fb->obj->stolen)
memset_io(info->screen_base, 0, info->screen_size);
/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
fb->width, fb->height,
i915_gem_obj_ggtt_offset(obj), obj);
mutex_unlock(&dev->struct_mutex);
vga_switcheroo_client_fb_set(dev->pdev, info);
return 0;
out_unpin:
i915_gem_object_ggtt_unpin(obj);
drm_gem_object_unreference(&obj->base);
out_unlock:
mutex_unlock(&dev->struct_mutex);
return ret;
}
