diff options
Diffstat (limited to 'drivers/gpu/drm/omapdrm')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/Makefile | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_crtc.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_debugfs.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_dmm_tiler.c | 15 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_drv.c | 44 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_drv.h | 17 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_encoder.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_fbdev.c | 9 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_gem.c | 304 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_plane.c | 55 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/tcm-sita.c | 804 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/tcm.h | 26 |
12 files changed, 444 insertions, 843 deletions
diff --git a/drivers/gpu/drm/omapdrm/Makefile b/drivers/gpu/drm/omapdrm/Makefile index 778372b062ad..368c1ec6805a 100644 --- a/drivers/gpu/drm/omapdrm/Makefile +++ b/drivers/gpu/drm/omapdrm/Makefile @@ -12,10 +12,11 @@ omapdrm-y := omap_drv.o \ omap_encoder.o \ omap_connector.o \ omap_fb.o \ - omap_fbdev.o \ omap_gem.o \ omap_gem_dmabuf.o \ omap_dmm_tiler.o \ tcm-sita.o +omapdrm-$(CONFIG_DRM_FBDEV_EMULATION) += omap_fbdev.o + obj-$(CONFIG_DRM_OMAP) += omapdrm.o diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c index ad09590e8a46..2ed0754ed19e 100644 --- a/drivers/gpu/drm/omapdrm/omap_crtc.c +++ b/drivers/gpu/drm/omapdrm/omap_crtc.c @@ -524,7 +524,7 @@ struct drm_crtc *omap_crtc_init(struct drm_device *dev, omap_crtc->mgr = omap_dss_get_overlay_manager(channel); ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL, - &omap_crtc_funcs); + &omap_crtc_funcs, NULL); if (ret < 0) { kfree(omap_crtc); return NULL; diff --git a/drivers/gpu/drm/omapdrm/omap_debugfs.c b/drivers/gpu/drm/omapdrm/omap_debugfs.c index ee91a25127f9..6f5fc14fc015 100644 --- a/drivers/gpu/drm/omapdrm/omap_debugfs.c +++ b/drivers/gpu/drm/omapdrm/omap_debugfs.c @@ -51,6 +51,7 @@ static int mm_show(struct seq_file *m, void *arg) return drm_mm_dump_table(m, &dev->vma_offset_manager->vm_addr_space_mm); } +#ifdef CONFIG_DRM_FBDEV_EMULATION static int fb_show(struct seq_file *m, void *arg) { struct drm_info_node *node = (struct drm_info_node *) m->private; @@ -73,12 +74,15 @@ static int fb_show(struct seq_file *m, void *arg) return 0; } +#endif /* list of debufs files that are applicable to all devices */ static struct drm_info_list omap_debugfs_list[] = { {"gem", gem_show, 0}, {"mm", mm_show, 0}, +#ifdef CONFIG_DRM_FBDEV_EMULATION {"fb", fb_show, 0}, +#endif }; /* list of debugfs files that are specific to devices with dmm/tiler */ diff --git a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c index 7841970de48d..dfebdc4aa0f2 100644 --- a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c +++ b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c @@ -363,6 +363,7 @@ struct tiler_block *tiler_reserve_2d(enum tiler_fmt fmt, uint16_t w, u32 min_align = 128; int ret; unsigned long flags; + size_t slot_bytes; BUG_ON(!validfmt(fmt)); @@ -371,13 +372,15 @@ struct tiler_block *tiler_reserve_2d(enum tiler_fmt fmt, uint16_t w, h = DIV_ROUND_UP(h, geom[fmt].slot_h); /* convert alignment to slots */ - min_align = max(min_align, (geom[fmt].slot_w * geom[fmt].cpp)); - align = ALIGN(align, min_align); - align /= geom[fmt].slot_w * geom[fmt].cpp; + slot_bytes = geom[fmt].slot_w * geom[fmt].cpp; + min_align = max(min_align, slot_bytes); + align = (align > min_align) ? ALIGN(align, min_align) : min_align; + align /= slot_bytes; block->fmt = fmt; - ret = tcm_reserve_2d(containers[fmt], w, h, align, &block->area); + ret = tcm_reserve_2d(containers[fmt], w, h, align, -1, slot_bytes, + &block->area); if (ret) { kfree(block); return ERR_PTR(-ENOMEM); @@ -739,8 +742,7 @@ static int omap_dmm_probe(struct platform_device *dev) programming during reill operations */ for (i = 0; i < omap_dmm->num_lut; i++) { omap_dmm->tcm[i] = sita_init(omap_dmm->container_width, - omap_dmm->container_height, - NULL); + omap_dmm->container_height); if (!omap_dmm->tcm[i]) { dev_err(&dev->dev, "failed to allocate container\n"); @@ -1030,4 +1032,3 @@ struct platform_driver omap_dmm_driver = { MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Andy Gross <andy.gross@ti.com>"); MODULE_DESCRIPTION("OMAP DMM/Tiler Driver"); -MODULE_ALIAS("platform:" DMM_DRIVER_NAME); diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c index 5c6609cbb6a2..dfafdb602ad2 100644 --- a/drivers/gpu/drm/omapdrm/omap_drv.c +++ b/drivers/gpu/drm/omapdrm/omap_drv.c @@ -547,14 +547,19 @@ static int ioctl_set_param(struct drm_device *dev, void *data, return 0; } +#define OMAP_BO_USER_MASK 0x00ffffff /* flags settable by userspace */ + static int ioctl_gem_new(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_omap_gem_new *args = data; + u32 flags = args->flags & OMAP_BO_USER_MASK; + VERB("%p:%p: size=0x%08x, flags=%08x", dev, file_priv, - args->size.bytes, args->flags); - return omap_gem_new_handle(dev, file_priv, args->size, - args->flags, &args->handle); + args->size.bytes, flags); + + return omap_gem_new_handle(dev, file_priv, args->size, flags, + &args->handle); } static int ioctl_gem_cpu_prep(struct drm_device *dev, void *data, @@ -692,10 +697,6 @@ static int dev_load(struct drm_device *dev, unsigned long flags) drm_crtc_vblank_off(priv->crtcs[i]); priv->fbdev = omap_fbdev_init(dev); - if (!priv->fbdev) { - dev_warn(dev->dev, "omap_fbdev_init failed\n"); - /* well, limp along without an fbdev.. maybe X11 will work? */ - } /* store off drm_device for use in pm ops */ dev_set_drvdata(dev->dev, dev); @@ -831,7 +832,8 @@ static const struct file_operations omapdriver_fops = { }; static struct drm_driver omap_drm_driver = { - .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME, + .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | + DRIVER_ATOMIC, .load = dev_load, .unload = dev_unload, .open = dev_open, @@ -928,35 +930,23 @@ static struct platform_driver pdev = { .remove = pdev_remove, }; +static struct platform_driver * const drivers[] = { + &omap_dmm_driver, + &pdev, +}; + static int __init omap_drm_init(void) { - int r; - DBG("init"); - r = platform_driver_register(&omap_dmm_driver); - if (r) { - pr_err("DMM driver registration failed\n"); - return r; - } - - r = platform_driver_register(&pdev); - if (r) { - pr_err("omapdrm driver registration failed\n"); - platform_driver_unregister(&omap_dmm_driver); - return r; - } - - return 0; + return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); } static void __exit omap_drm_fini(void) { DBG("fini"); - platform_driver_unregister(&pdev); - - platform_driver_unregister(&omap_dmm_driver); + platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); } /* need late_initcall() so we load after dss_driver's are loaded */ diff --git a/drivers/gpu/drm/omapdrm/omap_drv.h b/drivers/gpu/drm/omapdrm/omap_drv.h index 130fca70bfd7..9e0030731c37 100644 --- a/drivers/gpu/drm/omapdrm/omap_drv.h +++ b/drivers/gpu/drm/omapdrm/omap_drv.h @@ -36,11 +36,7 @@ #define MODULE_NAME "omapdrm" -/* max # of mapper-id's that can be assigned.. todo, come up with a better - * (but still inexpensive) way to store/access per-buffer mapper private - * data.. - */ -#define MAX_MAPPERS 2 +struct omap_drm_usergart; /* parameters which describe (unrotated) coordinates of scanout within a fb: */ struct omap_drm_window { @@ -97,6 +93,7 @@ struct omap_drm_private { /* list of GEM objects: */ struct list_head obj_list; + struct omap_drm_usergart *usergart; bool has_dmm; /* properties: */ @@ -138,8 +135,18 @@ void omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq); void omap_drm_irq_uninstall(struct drm_device *dev); int omap_drm_irq_install(struct drm_device *dev); +#ifdef CONFIG_DRM_FBDEV_EMULATION struct drm_fb_helper *omap_fbdev_init(struct drm_device *dev); void omap_fbdev_free(struct drm_device *dev); +#else +static inline struct drm_fb_helper *omap_fbdev_init(struct drm_device *dev) +{ + return NULL; +} +static inline void omap_fbdev_free(struct drm_device *dev) +{ +} +#endif struct omap_video_timings *omap_crtc_timings(struct drm_crtc *crtc); enum omap_channel omap_crtc_channel(struct drm_crtc *crtc); diff --git a/drivers/gpu/drm/omapdrm/omap_encoder.c b/drivers/gpu/drm/omapdrm/omap_encoder.c index 7d9b32a0eb43..61714e9670ae 100644 --- a/drivers/gpu/drm/omapdrm/omap_encoder.c +++ b/drivers/gpu/drm/omapdrm/omap_encoder.c @@ -110,8 +110,6 @@ static int omap_encoder_update(struct drm_encoder *encoder, struct omap_dss_driver *dssdrv = dssdev->driver; int ret; - dssdev->src->manager = omap_dss_get_overlay_manager(channel); - if (dssdrv->check_timings) { ret = dssdrv->check_timings(dssdev, timings); } else { @@ -178,7 +176,7 @@ struct drm_encoder *omap_encoder_init(struct drm_device *dev, encoder = &omap_encoder->base; drm_encoder_init(dev, encoder, &omap_encoder_funcs, - DRM_MODE_ENCODER_TMDS); + DRM_MODE_ENCODER_TMDS, NULL); drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs); return encoder; diff --git a/drivers/gpu/drm/omapdrm/omap_fbdev.c b/drivers/gpu/drm/omapdrm/omap_fbdev.c index b8e4cdec28c3..3cb16f0cf381 100644 --- a/drivers/gpu/drm/omapdrm/omap_fbdev.c +++ b/drivers/gpu/drm/omapdrm/omap_fbdev.c @@ -112,11 +112,8 @@ static int omap_fbdev_create(struct drm_fb_helper *helper, dma_addr_t paddr; int ret; - /* only doing ARGB32 since this is what is needed to alpha-blend - * with video overlays: - */ sizes->surface_bpp = 32; - sizes->surface_depth = 32; + sizes->surface_depth = 24; DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width, sizes->surface_height, sizes->surface_bpp, @@ -298,6 +295,10 @@ fini: drm_fb_helper_fini(helper); fail: kfree(fbdev); + + dev_warn(dev->dev, "omap_fbdev_init failed\n"); + /* well, limp along without an fbdev.. maybe X11 will work? */ + return NULL; } diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c index 7ed08fdc4c42..984462622291 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem.c +++ b/drivers/gpu/drm/omapdrm/omap_gem.c @@ -25,24 +25,15 @@ #include "omap_drv.h" #include "omap_dmm_tiler.h" -/* remove these once drm core helpers are merged */ -struct page **_drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask); -void _drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages, - bool dirty, bool accessed); -int _drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size); - /* * GEM buffer object implementation. */ -#define to_omap_bo(x) container_of(x, struct omap_gem_object, base) - /* note: we use upper 8 bits of flags for driver-internal flags: */ -#define OMAP_BO_DMA 0x01000000 /* actually is physically contiguous */ +#define OMAP_BO_DMA 0x01000000 /* actually is physically contiguous */ #define OMAP_BO_EXT_SYNC 0x02000000 /* externally allocated sync object */ #define OMAP_BO_EXT_MEM 0x04000000 /* externally allocated memory */ - struct omap_gem_object { struct drm_gem_object base; @@ -119,8 +110,7 @@ struct omap_gem_object { } *sync; }; -static int get_pages(struct drm_gem_object *obj, struct page ***pages); -static uint64_t mmap_offset(struct drm_gem_object *obj); +#define to_omap_bo(x) container_of(x, struct omap_gem_object, base) /* To deal with userspace mmap'ings of 2d tiled buffers, which (a) are * not necessarily pinned in TILER all the time, and (b) when they are @@ -134,27 +124,69 @@ static uint64_t mmap_offset(struct drm_gem_object *obj); * for later.. */ #define NUM_USERGART_ENTRIES 2 -struct usergart_entry { +struct omap_drm_usergart_entry { struct tiler_block *block; /* the reserved tiler block */ dma_addr_t paddr; struct drm_gem_object *obj; /* the current pinned obj */ pgoff_t obj_pgoff; /* page offset of obj currently mapped in */ }; -static struct { - struct usergart_entry entry[NUM_USERGART_ENTRIES]; + +struct omap_drm_usergart { + struct omap_drm_usergart_entry entry[NUM_USERGART_ENTRIES]; int height; /* height in rows */ int height_shift; /* ilog2(height in rows) */ int slot_shift; /* ilog2(width per slot) */ int stride_pfn; /* stride in pages */ int last; /* index of last used entry */ -} *usergart; +}; + +/* ----------------------------------------------------------------------------- + * Helpers + */ + +/** get mmap offset */ +static uint64_t mmap_offset(struct drm_gem_object *obj) +{ + struct drm_device *dev = obj->dev; + int ret; + size_t size; + + WARN_ON(!mutex_is_locked(&dev->struct_mutex)); + + /* Make it mmapable */ + size = omap_gem_mmap_size(obj); + ret = drm_gem_create_mmap_offset_size(obj, size); + if (ret) { + dev_err(dev->dev, "could not allocate mmap offset\n"); + return 0; + } + + return drm_vma_node_offset_addr(&obj->vma_node); +} + +/* GEM objects can either be allocated from contiguous memory (in which + * case obj->filp==NULL), or w/ shmem backing (obj->filp!=NULL). But non + * contiguous buffers can be remapped in TILER/DMM if they need to be + * contiguous... but we don't do this all the time to reduce pressure + * on TILER/DMM space when we know at allocation time that the buffer + * will need to be scanned out. + */ +static inline bool is_shmem(struct drm_gem_object *obj) +{ + return obj->filp != NULL; +} + +/* ----------------------------------------------------------------------------- + * Eviction + */ static void evict_entry(struct drm_gem_object *obj, - enum tiler_fmt fmt, struct usergart_entry *entry) + enum tiler_fmt fmt, struct omap_drm_usergart_entry *entry) { struct omap_gem_object *omap_obj = to_omap_bo(obj); - int n = usergart[fmt].height; + struct omap_drm_private *priv = obj->dev->dev_private; + int n = priv->usergart[fmt].height; size_t size = PAGE_SIZE * n; loff_t off = mmap_offset(obj) + (entry->obj_pgoff << PAGE_SHIFT); @@ -180,46 +212,25 @@ static void evict_entry(struct drm_gem_object *obj, static void evict(struct drm_gem_object *obj) { struct omap_gem_object *omap_obj = to_omap_bo(obj); + struct omap_drm_private *priv = obj->dev->dev_private; if (omap_obj->flags & OMAP_BO_TILED) { enum tiler_fmt fmt = gem2fmt(omap_obj->flags); int i; - if (!usergart) - return; - for (i = 0; i < NUM_USERGART_ENTRIES; i++) { - struct usergart_entry *entry = &usergart[fmt].entry[i]; + struct omap_drm_usergart_entry *entry = + &priv->usergart[fmt].entry[i]; + if (entry->obj == obj) evict_entry(obj, fmt, entry); } } } -/* GEM objects can either be allocated from contiguous memory (in which - * case obj->filp==NULL), or w/ shmem backing (obj->filp!=NULL). But non - * contiguous buffers can be remapped in TILER/DMM if they need to be - * contiguous... but we don't do this all the time to reduce pressure - * on TILER/DMM space when we know at allocation time that the buffer - * will need to be scanned out. - */ -static inline bool is_shmem(struct drm_gem_object *obj) -{ - return obj->filp != NULL; -} - -/** - * shmem buffers that are mapped cached can simulate coherency via using - * page faulting to keep track of dirty pages +/* ----------------------------------------------------------------------------- + * Page Management */ -static inline bool is_cached_coherent(struct drm_gem_object *obj) -{ - struct omap_gem_object *omap_obj = to_omap_bo(obj); - return is_shmem(obj) && - ((omap_obj->flags & OMAP_BO_CACHE_MASK) == OMAP_BO_CACHED); -} - -static DEFINE_SPINLOCK(sync_lock); /** ensure backing pages are allocated */ static int omap_gem_attach_pages(struct drm_gem_object *obj) @@ -272,6 +283,28 @@ free_pages: return ret; } +/* acquire pages when needed (for example, for DMA where physically + * contiguous buffer is not required + */ +static int get_pages(struct drm_gem_object *obj, struct page ***pages) +{ + struct omap_gem_object *omap_obj = to_omap_bo(obj); + int ret = 0; + + if (is_shmem(obj) && !omap_obj->pages) { + ret = omap_gem_attach_pages(obj); + if (ret) { + dev_err(obj->dev->dev, "could not attach pages\n"); + return ret; + } + } + + /* TODO: even phys-contig.. we should have a list of pages? */ + *pages = omap_obj->pages; + + return 0; +} + /** release backing pages */ static void omap_gem_detach_pages(struct drm_gem_object *obj) { @@ -301,26 +334,6 @@ uint32_t omap_gem_flags(struct drm_gem_object *obj) return to_omap_bo(obj)->flags; } -/** get mmap offset */ -static uint64_t mmap_offset(struct drm_gem_object *obj) -{ - struct drm_device *dev = obj->dev; - int ret; - size_t size; - - WARN_ON(!mutex_is_locked(&dev->struct_mutex)); - - /* Make it mmapable */ - size = omap_gem_mmap_size(obj); - ret = drm_gem_create_mmap_offset_size(obj, size); - if (ret) { - dev_err(dev->dev, "could not allocate mmap offset\n"); - return 0; - } - - return drm_vma_node_offset_addr(&obj->vma_node); -} - uint64_t omap_gem_mmap_offset(struct drm_gem_object *obj) { uint64_t offset; @@ -362,6 +375,10 @@ int omap_gem_tiled_size(struct drm_gem_object *obj, uint16_t *w, uint16_t *h) return -EINVAL; } +/* ----------------------------------------------------------------------------- + * Fault Handling + */ + /* Normal handling for the case of faulting in non-tiled buffers */ static int fault_1d(struct drm_gem_object *obj, struct vm_area_struct *vma, struct vm_fault *vmf) @@ -393,7 +410,8 @@ static int fault_2d(struct drm_gem_object *obj, struct vm_area_struct *vma, struct vm_fault *vmf) { struct omap_gem_object *omap_obj = to_omap_bo(obj); - struct usergart_entry *entry; + struct omap_drm_private *priv = obj->dev->dev_private; + struct omap_drm_usergart_entry *entry; enum tiler_fmt fmt = gem2fmt(omap_obj->flags); struct page *pages[64]; /* XXX is this too much to have on stack? */ unsigned long pfn; @@ -406,8 +424,8 @@ static int fault_2d(struct drm_gem_object *obj, * that need to be mapped in to fill 4kb wide CPU page. If the slot * height is 64, then 64 pages fill a 4kb wide by 64 row region. */ - const int n = usergart[fmt].height; - const int n_shift = usergart[fmt].height_shift; + const int n = priv->usergart[fmt].height; + const int n_shift = priv->usergart[fmt].height_shift; /* * If buffer width in bytes > PAGE_SIZE then the virtual stride is @@ -428,11 +446,11 @@ static int fault_2d(struct drm_gem_object *obj, base_pgoff = round_down(pgoff, m << n_shift); /* figure out buffer width in slots */ - slots = omap_obj->width >> usergart[fmt].slot_shift; + slots = omap_obj->width >> priv->usergart[fmt].slot_shift; vaddr = vmf->virtual_address - ((pgoff - base_pgoff) << PAGE_SHIFT); - entry = &usergart[fmt].entry[usergart[fmt].last]; + entry = &priv->usergart[fmt].entry[priv->usergart[fmt].last]; /* evict previous buffer using this usergart entry, if any: */ if (entry->obj) @@ -479,12 +497,13 @@ static int fault_2d(struct drm_gem_object *obj, for (i = n; i > 0; i--) { vm_insert_mixed(vma, (unsigned long)vaddr, pfn); - pfn += usergart[fmt].stride_pfn; + pfn += priv->usergart[fmt].stride_pfn; vaddr += PAGE_SIZE * m; } /* simple round-robin: */ - usergart[fmt].last = (usergart[fmt].last + 1) % NUM_USERGART_ENTRIES; + priv->usergart[fmt].last = (priv->usergart[fmt].last + 1) + % NUM_USERGART_ENTRIES; return 0; } @@ -596,6 +615,9 @@ int omap_gem_mmap_obj(struct drm_gem_object *obj, return 0; } +/* ----------------------------------------------------------------------------- + * Dumb Buffers + */ /** * omap_gem_dumb_create - create a dumb buffer @@ -653,6 +675,7 @@ fail: return ret; } +#ifdef CONFIG_DRM_FBDEV_EMULATION /* Set scrolling position. This allows us to implement fast scrolling * for console. * @@ -689,6 +712,22 @@ fail: return ret; } +#endif + +/* ----------------------------------------------------------------------------- + * Memory Management & DMA Sync + */ + +/** + * shmem buffers that are mapped cached can simulate coherency via using + * page faulting to keep track of dirty pages + */ +static inline bool is_cached_coherent(struct drm_gem_object *obj) +{ + struct omap_gem_object *omap_obj = to_omap_bo(obj); + return is_shmem(obj) && + ((omap_obj->flags & OMAP_BO_CACHE_MASK) == OMAP_BO_CACHED); +} /* Sync the buffer for CPU access.. note pages should already be * attached, ie. omap_gem_get_pages() @@ -865,28 +904,6 @@ int omap_gem_tiled_stride(struct drm_gem_object *obj, uint32_t orient) return ret; } -/* acquire pages when needed (for example, for DMA where physically - * contiguous buffer is not required - */ -static int get_pages(struct drm_gem_object *obj, struct page ***pages) -{ - struct omap_gem_object *omap_obj = to_omap_bo(obj); - int ret = 0; - - if (is_shmem(obj) && !omap_obj->pages) { - ret = omap_gem_attach_pages(obj); - if (ret) { - dev_err(obj->dev->dev, "could not attach pages\n"); - return ret; - } - } - - /* TODO: even phys-contig.. we should have a list of pages? */ - *pages = omap_obj->pages; - - return 0; -} - /* if !remap, and we don't have pages backing, then fail, rather than * increasing the pin count (which we don't really do yet anyways, * because we don't support swapping pages back out). And 'remap' @@ -924,6 +941,7 @@ int omap_gem_put_pages(struct drm_gem_object *obj) return 0; } +#ifdef CONFIG_DRM_FBDEV_EMULATION /* Get kernel virtual address for CPU access.. this more or less only * exists for omap_fbdev. This should be called with struct_mutex * held. @@ -942,6 +960,11 @@ void *omap_gem_vaddr(struct drm_gem_object *obj) } return omap_obj->vaddr; } +#endif + +/* ----------------------------------------------------------------------------- + * Power Management + */ #ifdef CONFIG_PM /* re-pin objects in DMM in resume path: */ @@ -971,6 +994,10 @@ int omap_gem_resume(struct device *dev) } #endif +/* ----------------------------------------------------------------------------- + * DebugFS + */ + #ifdef CONFIG_DEBUG_FS void omap_gem_describe(struct drm_gem_object *obj, struct seq_file *m) { @@ -1017,9 +1044,12 @@ void omap_gem_describe_objects(struct list_head *list, struct seq_file *m) } #endif -/* Buffer Synchronization: +/* ----------------------------------------------------------------------------- + * Buffer Synchronization */ +static DEFINE_SPINLOCK(sync_lock); + struct omap_gem_sync_waiter { struct list_head list; struct omap_gem_object *omap_obj; @@ -1265,6 +1295,10 @@ unlock: return ret; } +/* ----------------------------------------------------------------------------- + * Constructor & Destructor + */ + /* don't call directly.. called from GEM core when it is time to actually * free the object.. */ @@ -1282,8 +1316,6 @@ void omap_gem_free_object(struct drm_gem_object *obj) list_del(&omap_obj->mm_list); spin_unlock(&priv->list_lock); - drm_gem_free_mmap_offset(obj); - /* this means the object is still pinned.. which really should * not happen. I think.. */ @@ -1308,31 +1340,7 @@ void omap_gem_free_object(struct drm_gem_object *obj) drm_gem_object_release(obj); - kfree(obj); -} - -/* convenience method to construct a GEM buffer object, and userspace handle */ -int omap_gem_new_handle(struct drm_device *dev, struct drm_file *file, - union omap_gem_size gsize, uint32_t flags, uint32_t *handle) -{ - struct drm_gem_object *obj; - int ret; - - obj = omap_gem_new(dev, gsize, flags); - if (!obj) - return -ENOMEM; - - ret = drm_gem_handle_create(file, obj, handle); - if (ret) { - drm_gem_object_release(obj); - kfree(obj); /* TODO isn't there a dtor to call? just copying i915 */ - return ret; - } - - /* drop reference from allocate - handle holds it now */ - drm_gem_object_unreference_unlocked(obj); - - return 0; + kfree(omap_obj); } /* GEM buffer object constructor */ @@ -1341,15 +1349,15 @@ struct drm_gem_object *omap_gem_new(struct drm_device *dev, { struct omap_drm_private *priv = dev->dev_private; struct omap_gem_object *omap_obj; - struct drm_gem_object *obj = NULL; + struct drm_gem_object *obj; struct address_space *mapping; size_t size; int ret; if (flags & OMAP_BO_TILED) { - if (!usergart) { + if (!priv->usergart) { dev_err(dev->dev, "Tiled buffers require DMM\n"); - goto fail; + return NULL; } /* tiled buffers are always shmem paged backed.. when they are @@ -1420,16 +1428,42 @@ struct drm_gem_object *omap_gem_new(struct drm_device *dev, return obj; fail: - if (obj) + omap_gem_free_object(obj); + return NULL; +} + +/* convenience method to construct a GEM buffer object, and userspace handle */ +int omap_gem_new_handle(struct drm_device *dev, struct drm_file *file, + union omap_gem_size gsize, uint32_t flags, uint32_t *handle) +{ + struct drm_gem_object *obj; + int ret; + + obj = omap_gem_new(dev, gsize, flags); + if (!obj) + return -ENOMEM; + + ret = drm_gem_handle_create(file, obj, handle); + if (ret) { omap_gem_free_object(obj); + return ret; + } - return NULL; + /* drop reference from allocate - handle holds it now */ + drm_gem_object_unreference_unlocked(obj); + + return 0; } -/* init/cleanup.. if DMM is used, we need to set some stuff up.. */ +/* ----------------------------------------------------------------------------- + * Init & Cleanup + */ + +/* If DMM is used, we need to set some stuff up.. */ void omap_gem_init(struct drm_device *dev) { struct omap_drm_private *priv = dev->dev_private; + struct omap_drm_usergart *usergart; const enum tiler_fmt fmts[] = { TILFMT_8BIT, TILFMT_16BIT, TILFMT_32BIT }; @@ -1458,10 +1492,11 @@ void omap_gem_init(struct drm_device *dev) usergart[i].stride_pfn = tiler_stride(fmts[i], 0) >> PAGE_SHIFT; usergart[i].slot_shift = ilog2((PAGE_SIZE / h) >> i); for (j = 0; j < NUM_USERGART_ENTRIES; j++) { - struct usergart_entry *entry = &usergart[i].entry[j]; - struct tiler_block *block = - tiler_reserve_2d(fmts[i], w, h, - PAGE_SIZE); + struct omap_drm_usergart_entry *entry; + struct tiler_block *block; + + entry = &usergart[i].entry[j]; + block = tiler_reserve_2d(fmts[i], w, h, PAGE_SIZE); if (IS_ERR(block)) { dev_err(dev->dev, "reserve failed: %d, %d, %ld\n", @@ -1477,13 +1512,16 @@ void omap_gem_init(struct drm_device *dev) } } + priv->usergart = usergart; priv->has_dmm = true; } void omap_gem_deinit(struct drm_device *dev) { + struct omap_drm_private *priv = dev->dev_private; + /* I believe we can rely on there being no more outstanding GEM * objects which could depend on usergart/dmm at this point. */ - kfree(usergart); + kfree(priv->usergart); } diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c index 3054bda72688..d75b197eff46 100644 --- a/drivers/gpu/drm/omapdrm/omap_plane.c +++ b/drivers/gpu/drm/omapdrm/omap_plane.c @@ -188,33 +188,6 @@ static const struct drm_plane_helper_funcs omap_plane_helper_funcs = { .atomic_disable = omap_plane_atomic_disable, }; -static void omap_plane_reset(struct drm_plane *plane) -{ - struct omap_plane *omap_plane = to_omap_plane(plane); - struct omap_plane_state *omap_state; - - if (plane->state && plane->state->fb) - drm_framebuffer_unreference(plane->state->fb); - - kfree(plane->state); - plane->state = NULL; - - omap_state = kzalloc(sizeof(*omap_state), GFP_KERNEL); - if (omap_state == NULL) - return; - - /* - * Set defaults depending on whether we are a primary or overlay - * plane. - */ - omap_state->zorder = plane->type == DRM_PLANE_TYPE_PRIMARY - ? 0 : omap_plane->id; - omap_state->base.rotation = BIT(DRM_ROTATE_0); - - plane->state = &omap_state->base; - plane->state->plane = plane; -} - static void omap_plane_destroy(struct drm_plane *plane) { struct omap_plane *omap_plane = to_omap_plane(plane); @@ -270,6 +243,32 @@ static void omap_plane_atomic_destroy_state(struct drm_plane *plane, kfree(to_omap_plane_state(state)); } +static void omap_plane_reset(struct drm_plane *plane) +{ + struct omap_plane *omap_plane = to_omap_plane(plane); + struct omap_plane_state *omap_state; + + if (plane->state) { + omap_plane_atomic_destroy_state(plane, plane->state); + plane->state = NULL; + } + + omap_state = kzalloc(sizeof(*omap_state), GFP_KERNEL); + if (omap_state == NULL) + return; + + /* + * Set defaults depending on whether we are a primary or overlay + * plane. + */ + omap_state->zorder = plane->type == DRM_PLANE_TYPE_PRIMARY + ? 0 : omap_plane->id; + omap_state->base.rotation = BIT(DRM_ROTATE_0); + + plane->state = &omap_state->base; + plane->state->plane = plane; +} + static int omap_plane_atomic_set_property(struct drm_plane *plane, struct drm_plane_state *state, struct drm_property *property, @@ -366,7 +365,7 @@ struct drm_plane *omap_plane_init(struct drm_device *dev, ret = drm_universal_plane_init(dev, plane, (1 << priv->num_crtcs) - 1, &omap_plane_funcs, omap_plane->formats, - omap_plane->nformats, type); + omap_plane->nformats, type, NULL); if (ret < 0) goto error; diff --git a/drivers/gpu/drm/omapdrm/tcm-sita.c b/drivers/gpu/drm/omapdrm/tcm-sita.c index efb609510540..c10fdfc0930f 100644 --- a/drivers/gpu/drm/omapdrm/tcm-sita.c +++ b/drivers/gpu/drm/omapdrm/tcm-sita.c @@ -5,8 +5,9 @@ * * Authors: Ravi Ramachandra <r.ramachandra@ti.com>, * Lajos Molnar <molnar@ti.com> + * Andy Gross <andy.gross@ti.com> * - * Copyright (C) 2009-2010 Texas Instruments, Inc. + * Copyright (C) 2012 Texas Instruments, Inc. * * This package is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -17,687 +18,244 @@ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. * */ +#include <linux/init.h> +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/wait.h> +#include <linux/bitmap.h> #include <linux/slab.h> -#include <linux/spinlock.h> +#include "tcm.h" -#include "tcm-sita.h" - -#define ALIGN_DOWN(value, align) ((value) & ~((align) - 1)) - -/* Individual selection criteria for different scan areas */ -static s32 CR_L2R_T2B = CR_BIAS_HORIZONTAL; -static s32 CR_R2L_T2B = CR_DIAGONAL_BALANCE; - -/********************************************* - * TCM API - Sita Implementation - *********************************************/ -static s32 sita_reserve_2d(struct tcm *tcm, u16 h, u16 w, u8 align, - struct tcm_area *area); -static s32 sita_reserve_1d(struct tcm *tcm, u32 slots, struct tcm_area *area); -static s32 sita_free(struct tcm *tcm, struct tcm_area *area); -static void sita_deinit(struct tcm *tcm); - -/********************************************* - * Main Scanner functions - *********************************************/ -static s32 scan_areas_and_find_fit(struct tcm *tcm, u16 w, u16 h, u16 align, - struct tcm_area *area); - -static s32 scan_l2r_t2b(struct tcm *tcm, u16 w, u16 h, u16 align, - struct tcm_area *field, struct tcm_area *area); - -static s32 scan_r2l_t2b(struct tcm *tcm, u16 w, u16 h, u16 align, - struct tcm_area *field, struct tcm_area *area); - -static s32 scan_r2l_b2t_one_dim(struct tcm *tcm, u32 num_slots, - struct tcm_area *field, struct tcm_area *area); - -/********************************************* - * Support Infrastructure Methods - *********************************************/ -static s32 is_area_free(struct tcm_area ***map, u16 x0, u16 y0, u16 w, u16 h); - -static s32 update_candidate(struct tcm *tcm, u16 x0, u16 y0, u16 w, u16 h, - struct tcm_area *field, s32 criteria, - struct score *best); - -static void get_nearness_factor(struct tcm_area *field, - struct tcm_area *candidate, - struct nearness_factor *nf); - -static void get_neighbor_stats(struct tcm *tcm, struct tcm_area *area, - struct neighbor_stats *stat); - -static void fill_area(struct tcm *tcm, - struct tcm_area *area, struct tcm_area *parent); - - -/*********************************************/ - -/********************************************* - * Utility Methods - *********************************************/ -struct tcm *sita_init(u16 width, u16 height, struct tcm_pt *attr) -{ - struct tcm *tcm; - struct sita_pvt *pvt; - struct tcm_area area = {0}; - s32 i; - - if (width == 0 || height == 0) - return NULL; - - tcm = kmalloc(sizeof(*tcm), GFP_KERNEL); - pvt = kmalloc(sizeof(*pvt), GFP_KERNEL); - if (!tcm || !pvt) - goto error; - - memset(tcm, 0, sizeof(*tcm)); - memset(pvt, 0, sizeof(*pvt)); - - /* Updating the pointers to SiTA implementation APIs */ - tcm->height = height; - tcm->width = width; - tcm->reserve_2d = sita_reserve_2d; - tcm->reserve_1d = sita_reserve_1d; - tcm->free = sita_free; - tcm->deinit = sita_deinit; - tcm->pvt = (void *)pvt; - - spin_lock_init(&(pvt->lock)); - - /* Creating tam map */ - pvt->map = kmalloc(sizeof(*pvt->map) * tcm->width, GFP_KERNEL); - if (!pvt->map) - goto error; - - for (i = 0; i < tcm->width; i++) { - pvt->map[i] = - kmalloc(sizeof(**pvt->map) * tcm->height, - GFP_KERNEL); - if (pvt->map[i] == NULL) { - while (i--) - kfree(pvt->map[i]); - kfree(pvt->map); - goto error; - } - } - - if (attr && attr->x <= tcm->width && attr->y <= tcm->height) { - pvt->div_pt.x = attr->x; - pvt->div_pt.y = attr->y; - - } else { - /* Defaulting to 3:1 ratio on width for 2D area split */ - /* Defaulting to 3:1 ratio on height for 2D and 1D split */ - pvt->div_pt.x = (tcm->width * 3) / 4; - pvt->div_pt.y = (tcm->height * 3) / 4; - } - - spin_lock(&(pvt->lock)); - assign(&area, 0, 0, width - 1, height - 1); - fill_area(tcm, &area, NULL); - spin_unlock(&(pvt->lock)); - return tcm; - -error: - kfree(tcm); - kfree(pvt); - return NULL; -} - -static void sita_deinit(struct tcm *tcm) -{ - struct sita_pvt *pvt = (struct sita_pvt *)tcm->pvt; - struct tcm_area area = {0}; - s32 i; - - area.p1.x = tcm->width - 1; - area.p1.y = tcm->height - 1; - - spin_lock(&(pvt->lock)); - fill_area(tcm, &area, NULL); - spin_unlock(&(pvt->lock)); - - for (i = 0; i < tcm->height; i++) - kfree(pvt->map[i]); - kfree(pvt->map); - kfree(pvt); -} - -/** - * Reserve a 1D area in the container - * - * @param num_slots size of 1D area - * @param area pointer to the area that will be populated with the - * reserved area - * - * @return 0 on success, non-0 error value on failure. +static unsigned long mask[8]; +/* + * pos position in bitmap + * w width in slots + * h height in slots + * map ptr to bitmap + * stride slots in a row */ -static s32 sita_reserve_1d(struct tcm *tcm, u32 num_slots, - struct tcm_area *area) +static void free_slots(unsigned long pos, uint16_t w, uint16_t h, + unsigned long *map, uint16_t stride) { - s32 ret; - struct tcm_area field = {0}; - struct sita_pvt *pvt = (struct sita_pvt *)tcm->pvt; - - spin_lock(&(pvt->lock)); - - /* Scanning entire container */ - assign(&field, tcm->width - 1, tcm->height - 1, 0, 0); + int i; - ret = scan_r2l_b2t_one_dim(tcm, num_slots, &field, area); - if (!ret) - /* update map */ - fill_area(tcm, area, area); - - spin_unlock(&(pvt->lock)); - return ret; + for (i = 0; i < h; i++, pos += stride) + bitmap_clear(map, pos, w); } -/** - * Reserve a 2D area in the container - * - * @param w width - * @param h height - * @param area pointer to the area that will be populated with the reserved - * area - * - * @return 0 on success, non-0 error value on failure. +/* + * w width in slots + * pos ptr to position + * map ptr to bitmap + * num_bits number of bits in bitmap */ -static s32 sita_reserve_2d(struct tcm *tcm, u16 h, u16 w, u8 align, - struct tcm_area *area) +static int r2l_b2t_1d(uint16_t w, unsigned long *pos, unsigned long *map, + size_t num_bits) { - s32 ret; - struct sita_pvt *pvt = (struct sita_pvt *)tcm->pvt; + unsigned long search_count = 0; + unsigned long bit; + bool area_found = false; - /* not supporting more than 64 as alignment */ - if (align > 64) - return -EINVAL; + *pos = num_bits - w; - /* we prefer 1, 32 and 64 as alignment */ - align = align <= 1 ? 1 : align <= 32 ? 32 : 64; + while (search_count < num_bits) { + bit = find_next_bit(map, num_bits, *pos); - spin_lock(&(pvt->lock)); - ret = scan_areas_and_find_fit(tcm, w, h, align, area); - if (!ret) - /* update map */ - fill_area(tcm, area, area); + if (bit - *pos >= w) { + /* found a long enough free area */ + bitmap_set(map, *pos, w); + area_found = true; + break; + } - spin_unlock(&(pvt->lock)); - return ret; + search_count = num_bits - bit + w; + *pos = bit - w; + } + + return (area_found) ? 0 : -ENOMEM; } -/** - * Unreserve a previously allocated 2D or 1D area - * @param area area to be freed - * @return 0 - success +/* + * w = width in slots + * h = height in slots + * a = align in slots (mask, 2^n-1, 0 is unaligned) + * offset = offset in bytes from 4KiB + * pos = position in bitmap for buffer + * map = bitmap ptr + * num_bits = size of bitmap + * stride = bits in one row of container */ -static s32 sita_free(struct tcm *tcm, struct tcm_area *area) +static int l2r_t2b(uint16_t w, uint16_t h, uint16_t a, int16_t offset, + unsigned long *pos, unsigned long slot_bytes, + unsigned long *map, size_t num_bits, size_t slot_stride) { - struct sita_pvt *pvt = (struct sita_pvt *)tcm->pvt; - - spin_lock(&(pvt->lock)); + int i; + unsigned long index; + bool area_free; + unsigned long slots_per_band = PAGE_SIZE / slot_bytes; + unsigned long bit_offset = (offset > 0) ? offset / slot_bytes : 0; + unsigned long curr_bit = bit_offset; + + /* reset alignment to 1 if we are matching a specific offset */ + /* adjust alignment - 1 to get to the format expected in bitmaps */ + a = (offset > 0) ? 0 : a - 1; + + /* FIXME Return error if slots_per_band > stride */ + + while (curr_bit < num_bits) { + *pos = bitmap_find_next_zero_area(map, num_bits, curr_bit, w, + a); + + /* skip forward if we are not at right offset */ + if (bit_offset > 0 && (*pos % slots_per_band != bit_offset)) { + curr_bit = ALIGN(*pos, slots_per_band) + bit_offset; + continue; + } - /* check that this is in fact an existing area */ - WARN_ON(pvt->map[area->p0.x][area->p0.y] != area || - pvt->map[area->p1.x][area->p1.y] != area); + /* skip forward to next row if we overlap end of row */ + if ((*pos % slot_stride) + w > slot_stride) { + curr_bit = ALIGN(*pos, slot_stride) + bit_offset; + continue; + } - /* Clear the contents of the associated tiles in the map */ - fill_area(tcm, area, NULL); + /* TODO: Handle overlapping 4K boundaries */ - spin_unlock(&(pvt->lock)); + /* break out of look if we will go past end of container */ + if ((*pos + slot_stride * h) > num_bits) + break; - return 0; -} + /* generate mask that represents out matching pattern */ + bitmap_clear(mask, 0, slot_stride); + bitmap_set(mask, (*pos % BITS_PER_LONG), w); -/** - * Note: In general the cordinates in the scan field area relevant to the can - * sweep directions. The scan origin (e.g. top-left corner) will always be - * the p0 member of the field. Therfore, for a scan from top-left p0.x <= p1.x - * and p0.y <= p1.y; whereas, for a scan from bottom-right p1.x <= p0.x and p1.y - * <= p0.y - */ + /* assume the area is free until we find an overlap */ + area_free = true; -/** - * Raster scan horizontally right to left from top to bottom to find a place for - * a 2D area of given size inside a scan field. - * - * @param w width of desired area - * @param h height of desired area - * @param align desired area alignment - * @param area pointer to the area that will be set to the best position - * @param field area to scan (inclusive) - * - * @return 0 on success, non-0 error value on failure. - */ -static s32 scan_r2l_t2b(struct tcm *tcm, u16 w, u16 h, u16 align, - struct tcm_area *field, struct tcm_area *area) -{ - s32 x, y; - s16 start_x, end_x, start_y, end_y, found_x = -1; - struct tcm_area ***map = ((struct sita_pvt *)tcm->pvt)->map; - struct score best = {{0}, {0}, {0}, 0}; - - start_x = field->p0.x; - end_x = field->p1.x; - start_y = field->p0.y; - end_y = field->p1.y; - - /* check scan area co-ordinates */ - if (field->p0.x < field->p1.x || - field->p1.y < field->p0.y) - return -EINVAL; - - /* check if allocation would fit in scan area */ - if (w > LEN(start_x, end_x) || h > LEN(end_y, start_y)) - return -ENOSPC; - - /* adjust start_x and end_y, as allocation would not fit beyond */ - start_x = ALIGN_DOWN(start_x - w + 1, align); /* - 1 to be inclusive */ - end_y = end_y - h + 1; - - /* check if allocation would still fit in scan area */ - if (start_x < end_x) - return -ENOSPC; - - /* scan field top-to-bottom, right-to-left */ - for (y = start_y; y <= end_y; y++) { - for (x = start_x; x >= end_x; x -= align) { - if (is_area_free(map, x, y, w, h)) { - found_x = x; - - /* update best candidate */ - if (update_candidate(tcm, x, y, w, h, field, - CR_R2L_T2B, &best)) - goto done; - - /* change upper x bound */ - end_x = x + 1; + /* check subsequent rows to see if complete area is free */ + for (i = 1; i < h; i++) { + index = *pos / BITS_PER_LONG + i * 8; + if (bitmap_intersects(&map[index], mask, + (*pos % BITS_PER_LONG) + w)) { + area_free = false; break; - } else if (map[x][y] && map[x][y]->is2d) { - /* step over 2D areas */ - x = ALIGN(map[x][y]->p0.x - w + 1, align); } } - /* break if you find a free area shouldering the scan field */ - if (found_x == start_x) + if (area_free) break; - } - - if (!best.a.tcm) - return -ENOSPC; -done: - assign(area, best.a.p0.x, best.a.p0.y, best.a.p1.x, best.a.p1.y); - return 0; -} - -/** - * Raster scan horizontally left to right from top to bottom to find a place for - * a 2D area of given size inside a scan field. - * - * @param w width of desired area - * @param h height of desired area - * @param align desired area alignment - * @param area pointer to the area that will be set to the best position - * @param field area to scan (inclusive) - * - * @return 0 on success, non-0 error value on failure. - */ -static s32 scan_l2r_t2b(struct tcm *tcm, u16 w, u16 h, u16 align, - struct tcm_area *field, struct tcm_area *area) -{ - s32 x, y; - s16 start_x, end_x, start_y, end_y, found_x = -1; - struct tcm_area ***map = ((struct sita_pvt *)tcm->pvt)->map; - struct score best = {{0}, {0}, {0}, 0}; - - start_x = field->p0.x; - end_x = field->p1.x; - start_y = field->p0.y; - end_y = field->p1.y; - - /* check scan area co-ordinates */ - if (field->p1.x < field->p0.x || - field->p1.y < field->p0.y) - return -EINVAL; - - /* check if allocation would fit in scan area */ - if (w > LEN(end_x, start_x) || h > LEN(end_y, start_y)) - return -ENOSPC; - - start_x = ALIGN(start_x, align); - - /* check if allocation would still fit in scan area */ - if (w > LEN(end_x, start_x)) - return -ENOSPC; - - /* adjust end_x and end_y, as allocation would not fit beyond */ - end_x = end_x - w + 1; /* + 1 to be inclusive */ - end_y = end_y - h + 1; - - /* scan field top-to-bottom, left-to-right */ - for (y = start_y; y <= end_y; y++) { - for (x = start_x; x <= end_x; x += align) { - if (is_area_free(map, x, y, w, h)) { - found_x = x; - - /* update best candidate */ - if (update_candidate(tcm, x, y, w, h, field, - CR_L2R_T2B, &best)) - goto done; - /* change upper x bound */ - end_x = x - 1; - break; - } else if (map[x][y] && map[x][y]->is2d) { - /* step over 2D areas */ - x = ALIGN_DOWN(map[x][y]->p1.x, align); - } - } + /* go forward past this match */ + if (bit_offset > 0) + curr_bit = ALIGN(*pos, slots_per_band) + bit_offset; + else + curr_bit = *pos + a + 1; + } - /* break if you find a free area shouldering the scan field */ - if (found_x == start_x) - break; + if (area_free) { + /* set area as in-use. iterate over rows */ + for (i = 0, index = *pos; i < h; i++, index += slot_stride) + bitmap_set(map, index, w); } - if (!best.a.tcm) - return -ENOSPC; -done: - assign(area, best.a.p0.x, best.a.p0.y, best.a.p1.x, best.a.p1.y); - return 0; + return (area_free) ? 0 : -ENOMEM; } -/** - * Raster scan horizontally right to left from bottom to top to find a place - * for a 1D area of given size inside a scan field. - * - * @param num_slots size of desired area - * @param align desired area alignment - * @param area pointer to the area that will be set to the best - * position - * @param field area to scan (inclusive) - * - * @return 0 on success, non-0 error value on failure. - */ -static s32 scan_r2l_b2t_one_dim(struct tcm *tcm, u32 num_slots, - struct tcm_area *field, struct tcm_area *area) +static s32 sita_reserve_1d(struct tcm *tcm, u32 num_slots, + struct tcm_area *area) { - s32 found = 0; - s16 x, y; - struct sita_pvt *pvt = (struct sita_pvt *)tcm->pvt; - struct tcm_area *p; - - /* check scan area co-ordinates */ - if (field->p0.y < field->p1.y) - return -EINVAL; - - /** - * Currently we only support full width 1D scan field, which makes sense - * since 1D slot-ordering spans the full container width. - */ - if (tcm->width != field->p0.x - field->p1.x + 1) - return -EINVAL; - - /* check if allocation would fit in scan area */ - if (num_slots > tcm->width * LEN(field->p0.y, field->p1.y)) - return -ENOSPC; - - x = field->p0.x; - y = field->p0.y; - - /* find num_slots consecutive free slots to the left */ - while (found < num_slots) { - if (y < 0) - return -ENOSPC; - - /* remember bottom-right corner */ - if (found == 0) { - area->p1.x = x; - area->p1.y = y; - } - - /* skip busy regions */ - p = pvt->map[x][y]; - if (p) { - /* move to left of 2D areas, top left of 1D */ - x = p->p0.x; - if (!p->is2d) - y = p->p0.y; - - /* start over */ - found = 0; - } else { - /* count consecutive free slots */ - found++; - if (found == num_slots) - break; - } - - /* move to the left */ - if (x == 0) - y--; - x = (x ? : tcm->width) - 1; - + unsigned long pos; + int ret; + + spin_lock(&(tcm->lock)); + ret = r2l_b2t_1d(num_slots, &pos, tcm->bitmap, tcm->map_size); + if (!ret) { + area->p0.x = pos % tcm->width; + area->p0.y = pos / tcm->width; + area->p1.x = (pos + num_slots - 1) % tcm->width; + area->p1.y = (pos + num_slots - 1) / tcm->width; } + spin_unlock(&(tcm->lock)); - /* set top-left corner */ - area->p0.x = x; - area->p0.y = y; - return 0; + return ret; } -/** - * Find a place for a 2D area of given size inside a scan field based on its - * alignment needs. - * - * @param w width of desired area - * @param h height of desired area - * @param align desired area alignment - * @param area pointer to the area that will be set to the best position - * - * @return 0 on success, non-0 error value on failure. - */ -static s32 scan_areas_and_find_fit(struct tcm *tcm, u16 w, u16 h, u16 align, - struct tcm_area *area) +static s32 sita_reserve_2d(struct tcm *tcm, u16 h, u16 w, u16 align, + int16_t offset, uint16_t slot_bytes, + struct tcm_area *area) { - s32 ret = 0; - struct tcm_area field = {0}; - u16 boundary_x, boundary_y; - struct sita_pvt *pvt = (struct sita_pvt *)tcm->pvt; - - if (align > 1) { - /* prefer top-left corner */ - boundary_x = pvt->div_pt.x - 1; - boundary_y = pvt->div_pt.y - 1; - - /* expand width and height if needed */ - if (w > pvt->div_pt.x) - boundary_x = tcm->width - 1; - if (h > pvt->div_pt.y) - boundary_y = tcm->height - 1; - - assign(&field, 0, 0, boundary_x, boundary_y); - ret = scan_l2r_t2b(tcm, w, h, align, &field, area); - - /* scan whole container if failed, but do not scan 2x */ - if (ret != 0 && (boundary_x != tcm->width - 1 || - boundary_y != tcm->height - 1)) { - /* scan the entire container if nothing found */ - assign(&field, 0, 0, tcm->width - 1, tcm->height - 1); - ret = scan_l2r_t2b(tcm, w, h, align, &field, area); - } - } else if (align == 1) { - /* prefer top-right corner */ - boundary_x = pvt->div_pt.x; - boundary_y = pvt->div_pt.y - 1; - - /* expand width and height if needed */ - if (w > (tcm->width - pvt->div_pt.x)) - boundary_x = 0; - if (h > pvt->div_pt.y) - boundary_y = tcm->height - 1; - - assign(&field, tcm->width - 1, 0, boundary_x, boundary_y); - ret = scan_r2l_t2b(tcm, w, h, align, &field, area); - - /* scan whole container if failed, but do not scan 2x */ - if (ret != 0 && (boundary_x != 0 || - boundary_y != tcm->height - 1)) { - /* scan the entire container if nothing found */ - assign(&field, tcm->width - 1, 0, 0, tcm->height - 1); - ret = scan_r2l_t2b(tcm, w, h, align, &field, - area); - } + unsigned long pos; + int ret; + + spin_lock(&(tcm->lock)); + ret = l2r_t2b(w, h, align, offset, &pos, slot_bytes, tcm->bitmap, + tcm->map_size, tcm->width); + + if (!ret) { + area->p0.x = pos % tcm->width; + area->p0.y = pos / tcm->width; + area->p1.x = area->p0.x + w - 1; + area->p1.y = area->p0.y + h - 1; } + spin_unlock(&(tcm->lock)); return ret; } -/* check if an entire area is free */ -static s32 is_area_free(struct tcm_area ***map, u16 x0, u16 y0, u16 w, u16 h) +static void sita_deinit(struct tcm *tcm) { - u16 x = 0, y = 0; - for (y = y0; y < y0 + h; y++) { - for (x = x0; x < x0 + w; x++) { - if (map[x][y]) - return false; - } - } - return true; + kfree(tcm); } -/* fills an area with a parent tcm_area */ -static void fill_area(struct tcm *tcm, struct tcm_area *area, - struct tcm_area *parent) +static s32 sita_free(struct tcm *tcm, struct tcm_area *area) { - s32 x, y; - struct sita_pvt *pvt = (struct sita_pvt *)tcm->pvt; - struct tcm_area a, a_; - - /* set area's tcm; otherwise, enumerator considers it invalid */ - area->tcm = tcm; - - tcm_for_each_slice(a, *area, a_) { - for (x = a.p0.x; x <= a.p1.x; ++x) - for (y = a.p0.y; y <= a.p1.y; ++y) - pvt->map[x][y] = parent; + unsigned long pos; + uint16_t w, h; + pos = area->p0.x + area->p0.y * tcm->width; + if (area->is2d) { + w = area->p1.x - area->p0.x + 1; + h = area->p1.y - area->p0.y + 1; + } else { + w = area->p1.x + area->p1.y * tcm->width - pos + 1; + h = 1; } + + spin_lock(&(tcm->lock)); + free_slots(pos, w, h, tcm->bitmap, tcm->width); + spin_unlock(&(tcm->lock)); + return 0; } -/** - * Compares a candidate area to the current best area, and if it is a better - * fit, it updates the best to this one. - * - * @param x0, y0, w, h top, left, width, height of candidate area - * @param field scan field - * @param criteria scan criteria - * @param best best candidate and its scores - * - * @return 1 (true) if the candidate area is known to be the final best, so no - * more searching should be performed - */ -static s32 update_candidate(struct tcm *tcm, u16 x0, u16 y0, u16 w, u16 h, - struct tcm_area *field, s32 criteria, - struct score *best) +struct tcm *sita_init(u16 width, u16 height) { - struct score me; /* score for area */ - - /* - * NOTE: For horizontal bias we always give the first found, because our - * scan is horizontal-raster-based and the first candidate will always - * have the horizontal bias. - */ - bool first = criteria & CR_BIAS_HORIZONTAL; - - assign(&me.a, x0, y0, x0 + w - 1, y0 + h - 1); - - /* calculate score for current candidate */ - if (!first) { - get_neighbor_stats(tcm, &me.a, &me.n); - me.neighs = me.n.edge + me.n.busy; - get_nearness_factor(field, &me.a, &me.f); - } - - /* the 1st candidate is always the best */ - if (!best->a.tcm) - goto better; + struct tcm *tcm; + size_t map_size = BITS_TO_LONGS(width*height) * sizeof(unsigned long); - BUG_ON(first); + if (width == 0 || height == 0) + return NULL; - /* diagonal balance check */ - if ((criteria & CR_DIAGONAL_BALANCE) && - best->neighs <= me.neighs && - (best->neighs < me.neighs || - /* this implies that neighs and occupied match */ - best->n.busy < me.n.busy || - (best->n.busy == me.n.busy && - /* check the nearness factor */ - best->f.x + best->f.y > me.f.x + me.f.y))) - goto better; + tcm = kzalloc(sizeof(*tcm) + map_size, GFP_KERNEL); + if (!tcm) + goto error; - /* not better, keep going */ - return 0; + /* Updating the pointers to SiTA implementation APIs */ + tcm->height = height; + tcm->width = width; + tcm->reserve_2d = sita_reserve_2d; + tcm->reserve_1d = sita_reserve_1d; + tcm->free = sita_free; + tcm->deinit = sita_deinit; -better: - /* save current area as best */ - memcpy(best, &me, sizeof(me)); - best->a.tcm = tcm; - return first; -} + spin_lock_init(&tcm->lock); + tcm->bitmap = (unsigned long *)(tcm + 1); + bitmap_clear(tcm->bitmap, 0, width*height); -/** - * Calculate the nearness factor of an area in a search field. The nearness - * factor is smaller if the area is closer to the search origin. - */ -static void get_nearness_factor(struct tcm_area *field, struct tcm_area *area, - struct nearness_factor *nf) -{ - /** - * Using signed math as field coordinates may be reversed if - * search direction is right-to-left or bottom-to-top. - */ - nf->x = (s32)(area->p0.x - field->p0.x) * 1000 / - (field->p1.x - field->p0.x); - nf->y = (s32)(area->p0.y - field->p0.y) * 1000 / - (field->p1.y - field->p0.y); -} + tcm->map_size = width*height; -/* get neighbor statistics */ -static void get_neighbor_stats(struct tcm *tcm, struct tcm_area *area, - struct neighbor_stats *stat) -{ - s16 x = 0, y = 0; - struct sita_pvt *pvt = (struct sita_pvt *)tcm->pvt; - - /* Clearing any exisiting values */ - memset(stat, 0, sizeof(*stat)); - - /* process top & bottom edges */ - for (x = area->p0.x; x <= area->p1.x; x++) { - if (area->p0.y == 0) - stat->edge++; - else if (pvt->map[x][area->p0.y - 1]) - stat->busy++; - - if (area->p1.y == tcm->height - 1) - stat->edge++; - else if (pvt->map[x][area->p1.y + 1]) - stat->busy++; - } + return tcm; - /* process left & right edges */ - for (y = area->p0.y; y <= area->p1.y; ++y) { - if (area->p0.x == 0) - stat->edge++; - else if (pvt->map[area->p0.x - 1][y]) - stat->busy++; - - if (area->p1.x == tcm->width - 1) - stat->edge++; - else if (pvt->map[area->p1.x + 1][y]) - stat->busy++; - } +error: + kfree(tcm); + return NULL; } diff --git a/drivers/gpu/drm/omapdrm/tcm.h b/drivers/gpu/drm/omapdrm/tcm.h index a8d5ce47686f..ef7df7d6fc84 100644 --- a/drivers/gpu/drm/omapdrm/tcm.h +++ b/drivers/gpu/drm/omapdrm/tcm.h @@ -61,18 +61,17 @@ struct tcm { unsigned int y_offset; /* offset to use for y coordinates */ - /* 'pvt' structure shall contain any tcm details (attr) along with - linked list of allocated areas and mutex for mutually exclusive access - to the list. It may also contain copies of width and height to notice - any changes to the publicly available width and height fields. */ - void *pvt; + spinlock_t lock; + unsigned long *bitmap; + size_t map_size; /* function table */ - s32 (*reserve_2d)(struct tcm *tcm, u16 height, u16 width, u8 align, + s32 (*reserve_2d)(struct tcm *tcm, u16 height, u16 width, u16 align, + int16_t offset, uint16_t slot_bytes, struct tcm_area *area); s32 (*reserve_1d)(struct tcm *tcm, u32 slots, struct tcm_area *area); - s32 (*free) (struct tcm *tcm, struct tcm_area *area); - void (*deinit) (struct tcm *tcm); + s32 (*free)(struct tcm *tcm, struct tcm_area *area); + void (*deinit)(struct tcm *tcm); }; /*============================================================================= @@ -91,7 +90,7 @@ struct tcm { * */ -struct tcm *sita_init(u16 width, u16 height, struct tcm_pt *attr); +struct tcm *sita_init(u16 width, u16 height); /** @@ -120,6 +119,9 @@ static inline void tcm_deinit(struct tcm *tcm) * all values may be supported by the container manager, * but it must support 0 (1), 32 and 64. * 0 value is equivalent to 1. + * @param offset Offset requirement, in bytes. This is the offset + * from a 4KiB aligned virtual address. + * @param slot_bytes Width of slot in bytes * @param area Pointer to where the reserved area should be stored. * * @return 0 on success. Non-0 error code on failure. Also, @@ -129,7 +131,8 @@ static inline void tcm_deinit(struct tcm *tcm) * allocation. */ static inline s32 tcm_reserve_2d(struct tcm *tcm, u16 width, u16 height, - u16 align, struct tcm_area *area) + u16 align, int16_t offset, uint16_t slot_bytes, + struct tcm_area *area) { /* perform rudimentary error checking */ s32 res = tcm == NULL ? -ENODEV : @@ -140,7 +143,8 @@ static inline s32 tcm_reserve_2d(struct tcm *tcm, u16 width, u16 height, if (!res) { area->is2d = true; - res = tcm->reserve_2d(tcm, height, width, align, area); + res = tcm->reserve_2d(tcm, height, width, align, offset, + slot_bytes, area); area->tcm = res ? NULL : tcm; } |
