From e1684a048b709f886dcd996901580f8a65b18391 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 19 Apr 2011 15:28:21 +0100 Subject: [PATCH] gma500: GEM - now we have the basics we shall stick pins in it Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/staging/gma500/psb_gtt.c | 70 ++++++++++++++++------ drivers/staging/gma500/psb_gtt.h | 13 ++-- drivers/staging/gma500/psb_intel_display.c | 33 ++++++---- 3 files changed, 80 insertions(+), 36 deletions(-) diff --git a/drivers/staging/gma500/psb_gtt.c b/drivers/staging/gma500/psb_gtt.c index 090d30e21643..a991c12315ce 100644 --- a/drivers/staging/gma500/psb_gtt.c +++ b/drivers/staging/gma500/psb_gtt.c @@ -66,7 +66,6 @@ u32 *psb_gtt_entry(struct drm_device *dev, struct gtt_range *r) return dev_priv->gtt_map + (offset >> PAGE_SHIFT); } - /** * psb_gtt_insert - put an object into the GART * @dev: our DRM device @@ -77,21 +76,19 @@ u32 *psb_gtt_entry(struct drm_device *dev, struct gtt_range *r) * * FIXME: gtt lock ? */ -int psb_gtt_insert(struct drm_device *dev, struct gtt_range *r) +static int psb_gtt_insert(struct drm_device *dev, struct gtt_range *r) { u32 *gtt_slot, pte; int numpages = (r->resource.end + 1 - r->resource.start) >> PAGE_SHIFT; struct page **pages; int i; - if (r->stolen) - return 0; if (r->pages == NULL) { WARN_ON(1); return -EINVAL; } - WARN_ON(r->in_gart); /* refcount these maybe ? */ + WARN_ON(r->stolen); /* refcount these maybe ? */ gtt_slot = psb_gtt_entry(dev, r); pages = r->pages; @@ -118,16 +115,14 @@ int psb_gtt_insert(struct drm_device *dev, struct gtt_range *r) * page table entries with the dummy page */ -void psb_gtt_remove(struct drm_device *dev, struct gtt_range *r) +static void psb_gtt_remove(struct drm_device *dev, struct gtt_range *r) { struct drm_psb_private *dev_priv = dev->dev_private; u32 *gtt_slot, pte; int numpages = (r->resource.end + 1 - r->resource.start) >> PAGE_SHIFT; int i; - if (r->stolen) - return; - WARN_ON(!r->in_gart); + WARN_ON(r->stolen); gtt_slot = psb_gtt_entry(dev, r); pte = psb_gtt_mask_pte(page_to_pfn(dev_priv->scratch_page), 0);; @@ -146,7 +141,7 @@ void psb_gtt_remove(struct drm_device *dev, struct gtt_range *r) * Pin and build an in kernel list of the pages that back our GEM object. * While we hold this the pages cannot be swapped out */ -int psb_gtt_attach_pages(struct gtt_range *gt) +static int psb_gtt_attach_pages(struct gtt_range *gt) { struct inode *inode; struct address_space *mapping; @@ -189,13 +184,11 @@ err: * must have been removed from the GART as they could now be paged out * and move bus address. */ -void psb_gtt_detach_pages(struct gtt_range *gt) +static void psb_gtt_detach_pages(struct gtt_range *gt) { int i; int pages = (gt->resource.end + 1 - gt->resource.start) >> PAGE_SHIFT; - WARN_ON(gt->in_gart); - for (i = 0; i < pages; i++) { /* FIXME: do we need to force dirty */ set_page_dirty(gt->pages[i]); @@ -206,6 +199,50 @@ void psb_gtt_detach_pages(struct gtt_range *gt) gt->pages = NULL; } +/* + * Manage pinning of resources into the GART + */ + +int psb_gtt_pin(struct drm_device *dev, struct gtt_range *gt) +{ + int ret; + struct drm_psb_private *dev_priv = dev->dev_private; + + mutex_lock(&dev_priv->gtt_mutex); + + if (gt->in_gart == 0 && gt->stolen == 0) { + ret = psb_gtt_attach_pages(gt); + if (ret < 0) + goto out; + ret = psb_gtt_insert(dev, gt); + if (ret < 0) { + psb_gtt_detach_pages(gt); + goto out; + } + } + gt->in_gart++; +out: + mutex_unlock(&dev_priv->gtt_mutex); + return ret; +} + +void psb_gtt_unpin(struct drm_device *dev, struct gtt_range *gt) +{ + struct drm_psb_private *dev_priv = dev->dev_private; + + mutex_lock(&dev_priv->gtt_mutex); + + WARN_ON(!gt->in_gart); + + gt->in_gart--; + if (gt->in_gart == 0 && gt->stolen == 0) { + psb_gtt_remove(dev, gt); + psb_gtt_detach_pages(gt); + } + + mutex_unlock(&dev_priv->gtt_mutex); +} + /* * GTT resource allocator - allocate and manage GTT address space */ @@ -265,10 +302,7 @@ struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len, static void psb_gtt_destroy(struct kref *kref) { struct gtt_range *gt = container_of(kref, struct gtt_range, kref); - if (gt->in_gart && !gt->stolen) - psb_gtt_remove(gt->gem.dev, gt); - if (gt->pages) - psb_gtt_detach_pages(gt); + WARN_ON(gt->in_gart && !gt->stolen); release_resource(>->resource); kfree(gt); } @@ -345,6 +379,8 @@ int psb_gtt_init(struct drm_device *dev, int resume) int ret = 0; uint32_t pte; + mutex_init(&dev_priv->gtt_mutex); + dev_priv->pg = pg = psb_gtt_alloc(dev); if (pg == NULL) return -ENOMEM; diff --git a/drivers/staging/gma500/psb_gtt.h b/drivers/staging/gma500/psb_gtt.h index b5d653088bc3..dc553e07a9de 100644 --- a/drivers/staging/gma500/psb_gtt.h +++ b/drivers/staging/gma500/psb_gtt.h @@ -44,18 +44,17 @@ struct gtt_range { struct resource resource; u32 offset; struct kref kref; - struct drm_gem_object gem; /* GEM high level stuff */ - int in_gart; /* Currently in the GART */ - int stolen; /* Backed from stolen RAM */ - struct page **pages; /* Backing pages if present */ + struct drm_gem_object gem; /* GEM high level stuff */ + int in_gart; /* Currently in the GART (ref ct) */ + bool stolen; /* Backed from stolen RAM */ + struct page **pages; /* Backing pages if present */ }; -extern int psb_gtt_insert(struct drm_device *dev, struct gtt_range *r); -extern void psb_gtt_remove(struct drm_device *dev, struct gtt_range *r); - extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len, const char *name, int backed); extern void psb_gtt_kref_put(struct gtt_range *gt); extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt); +extern int psb_gtt_pin(struct drm_device *dev, struct gtt_range *gt); +extern void psb_gtt_unpin(struct drm_device *dev, struct gtt_range *gt); #endif diff --git a/drivers/staging/gma500/psb_intel_display.c b/drivers/staging/gma500/psb_intel_display.c index 4d384d592e09..b5a36d20d0ba 100644 --- a/drivers/staging/gma500/psb_intel_display.c +++ b/drivers/staging/gma500/psb_intel_display.c @@ -341,7 +341,6 @@ int psb_intel_pipe_set_base(struct drm_crtc *crtc, /* struct drm_i915_master_private *master_priv; */ struct psb_intel_crtc *psb_intel_crtc = to_psb_intel_crtc(crtc); struct psb_framebuffer *psbfb = to_psb_fb(crtc->fb); - struct psb_intel_mode_device *mode_dev = psb_intel_crtc->mode_dev; int pipe = psb_intel_crtc->pipe; unsigned long start, offset; int dspbase = (pipe == 0 ? DSPABASE : DSPBBASE); @@ -1020,8 +1019,6 @@ static int psb_intel_crtc_cursor_set(struct drm_crtc *crtc, uint32_t width, uint32_t height) { struct drm_device *dev = crtc->dev; - struct drm_psb_private *dev_priv = - (struct drm_psb_private *)dev->dev_private; struct psb_intel_crtc *psb_intel_crtc = to_psb_intel_crtc(crtc); int pipe = psb_intel_crtc->pipe; uint32_t control = (pipe == 0) ? CURACNTR : CURBCNTR; @@ -1048,6 +1045,9 @@ static int psb_intel_crtc_cursor_set(struct drm_crtc *crtc, /* Unpin the old GEM object */ if (psb_intel_crtc->cursor_obj) { + gt = container_of(psb_intel_crtc->cursor_obj, + struct gtt_range, gem); + psb_gtt_unpin(crtc->dev, gt); drm_gem_object_unreference(psb_intel_crtc->cursor_obj); psb_intel_crtc->cursor_obj = NULL; } @@ -1070,19 +1070,17 @@ static int psb_intel_crtc_cursor_set(struct drm_crtc *crtc, return -ENOMEM; } - /*insert this bo into gtt*/ - DRM_DEBUG("%s: map meminfo for hw cursor. handle %x\n", - __func__, handle); + gt = container_of(obj, struct gtt_range, gem); -/* Pin : FIXME + /* Pin the memory into the GTT */ + ret = psb_gtt_pin(crtc->dev, gt); if (ret) { - DRM_ERROR("Can not map meminfo to GTT. handle 0x%x\n", handle); + DRM_ERROR("Can not pin down handle 0x%x\n", handle); return ret; } -*/ - gt = container_of(obj, struct gtt_range, gem); - addr = gt->resource.start; + + addr = gt->offset; /* Or resource.start ??? */ psb_intel_crtc->cursor_addr = addr; @@ -1099,6 +1097,9 @@ static int psb_intel_crtc_cursor_set(struct drm_crtc *crtc, /* unpin the old bo */ if (psb_intel_crtc->cursor_obj && psb_intel_crtc->cursor_obj != obj) { + gt = container_of(psb_intel_crtc->cursor_obj, + struct gtt_range, gem); + psb_gtt_unpin(crtc->dev, gt); drm_gem_object_unreference(psb_intel_crtc->cursor_obj); psb_intel_crtc->cursor_obj = obj; } @@ -1301,8 +1302,16 @@ struct drm_display_mode *psb_intel_crtc_mode_get(struct drm_device *dev, static void psb_intel_crtc_destroy(struct drm_crtc *crtc) { struct psb_intel_crtc *psb_intel_crtc = to_psb_intel_crtc(crtc); + struct gtt_range *gt; - /* FIXME: do we need to put the final GEM cursor ? */ + /* Unpin the old GEM object */ + if (psb_intel_crtc->cursor_obj) { + gt = container_of(psb_intel_crtc->cursor_obj, + struct gtt_range, gem); + psb_gtt_unpin(crtc->dev, gt); + drm_gem_object_unreference(psb_intel_crtc->cursor_obj); + psb_intel_crtc->cursor_obj = NULL; + } kfree(psb_intel_crtc->crtc_state); drm_crtc_cleanup(crtc); kfree(psb_intel_crtc); -- 2.20.1