Use the new vma manager instead of the old hashtable. Also convert all drivers to use the new convenience helpers. This drops all the (map_list.hash.key << PAGE_SHIFT) non-sense.
Locking and access-management is exactly the same as before with an additional lock inside of the vma-manager, which strictly wouldn't be needed for gem.
Signed-off-by: David Herrmann dh.herrmann@gmail.com --- drivers/gpu/drm/drm_gem.c | 89 +++++------------------------- drivers/gpu/drm/drm_gem_cma_helper.c | 9 +-- drivers/gpu/drm/exynos/exynos_drm_gem.c | 7 ++- drivers/gpu/drm/gma500/gem.c | 8 +-- drivers/gpu/drm/i915/i915_gem.c | 9 +-- drivers/gpu/drm/omapdrm/omap_gem.c | 11 ++-- drivers/gpu/drm/omapdrm/omap_gem_helpers.c | 49 +--------------- drivers/gpu/drm/udl/udl_gem.c | 6 +- include/drm/drmP.h | 7 +-- include/drm/drm_vma_manager.h | 1 - include/uapi/drm/drm.h | 2 +- 11 files changed, 47 insertions(+), 151 deletions(-)
diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index 88f0322..e1d0f67 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -37,6 +37,7 @@ #include <linux/shmem_fs.h> #include <linux/dma-buf.h> #include <drm/drmP.h> +#include <drm/drm_vma_manager.h>
/** @file drm_gem.c * @@ -102,14 +103,9 @@ drm_gem_init(struct drm_device *dev) }
dev->mm_private = mm; - - if (drm_ht_create(&mm->offset_hash, 12)) { - kfree(mm); - return -ENOMEM; - } - - drm_mm_init(&mm->offset_manager, DRM_FILE_PAGE_OFFSET_START, - DRM_FILE_PAGE_OFFSET_SIZE); + drm_vma_offset_manager_init(&mm->vma_manager, + DRM_FILE_PAGE_OFFSET_START, + DRM_FILE_PAGE_OFFSET_SIZE);
return 0; } @@ -119,8 +115,7 @@ drm_gem_destroy(struct drm_device *dev) { struct drm_gem_mm *mm = dev->mm_private;
- drm_mm_takedown(&mm->offset_manager); - drm_ht_remove(&mm->offset_hash); + drm_vma_offset_manager_destroy(&mm->vma_manager); kfree(mm); dev->mm_private = NULL; } @@ -306,12 +301,8 @@ drm_gem_free_mmap_offset(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; struct drm_gem_mm *mm = dev->mm_private; - struct drm_map_list *list = &obj->map_list;
- drm_ht_remove_item(&mm->offset_hash, &list->hash); - drm_mm_put_block(list->file_offset_node); - kfree(list->map); - list->map = NULL; + drm_vma_offset_remove(&mm->vma_manager, &obj->vma_node); } EXPORT_SYMBOL(drm_gem_free_mmap_offset);
@@ -331,54 +322,9 @@ drm_gem_create_mmap_offset(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; struct drm_gem_mm *mm = dev->mm_private; - struct drm_map_list *list; - struct drm_local_map *map; - int ret; - - /* Set the object up for mmap'ing */ - list = &obj->map_list; - list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL); - if (!list->map) - return -ENOMEM; - - map = list->map; - map->type = _DRM_GEM; - map->size = obj->size; - map->handle = obj; - - /* Get a DRM GEM mmap offset allocated... */ - list->file_offset_node = drm_mm_search_free(&mm->offset_manager, - obj->size / PAGE_SIZE, 0, false); - - if (!list->file_offset_node) { - DRM_ERROR("failed to allocate offset for bo %d\n", obj->name); - ret = -ENOSPC; - goto out_free_list; - }
- list->file_offset_node = drm_mm_get_block(list->file_offset_node, - obj->size / PAGE_SIZE, 0); - if (!list->file_offset_node) { - ret = -ENOMEM; - goto out_free_list; - } - - list->hash.key = list->file_offset_node->start; - ret = drm_ht_insert_item(&mm->offset_hash, &list->hash); - if (ret) { - DRM_ERROR("failed to add to map hash\n"); - goto out_free_mm; - } - - return 0; - -out_free_mm: - drm_mm_put_block(list->file_offset_node); -out_free_list: - kfree(list->map); - list->map = NULL; - - return ret; + return drm_vma_offset_add(&mm->vma_manager, &obj->vma_node, + obj->size / PAGE_SIZE); } EXPORT_SYMBOL(drm_gem_create_mmap_offset);
@@ -660,9 +606,8 @@ int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) struct drm_file *priv = filp->private_data; struct drm_device *dev = priv->minor->dev; struct drm_gem_mm *mm = dev->mm_private; - struct drm_local_map *map = NULL; struct drm_gem_object *obj; - struct drm_hash_item *hash; + struct drm_vma_offset_node *node; int ret = 0;
if (drm_device_is_unplugged(dev)) @@ -670,25 +615,19 @@ int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
mutex_lock(&dev->struct_mutex);
- if (drm_ht_find_item(&mm->offset_hash, vma->vm_pgoff, &hash)) { + node = drm_vma_offset_exact_lookup(&mm->vma_manager, vma->vm_pgoff); + if (!node) { mutex_unlock(&dev->struct_mutex); return drm_mmap(filp, vma); } - - map = drm_hash_entry(hash, struct drm_map_list, hash)->map; - if (!map || - ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) { - ret = -EPERM; - goto out_unlock; - } + obj = container_of(node, struct drm_gem_object, vma_node);
/* Check for valid size. */ - if (map->size < vma->vm_end - vma->vm_start) { + if (node->vm_pages < vma_pages(vma)) { ret = -EINVAL; goto out_unlock; }
- obj = map->handle; if (!obj->dev->driver->gem_vm_ops) { ret = -EINVAL; goto out_unlock; @@ -696,7 +635,7 @@ int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP; vma->vm_ops = obj->dev->driver->gem_vm_ops; - vma->vm_private_data = map->handle; + vma->vm_private_data = (void*)obj; vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
/* Take a ref for this mapping of the object, so that the fault diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c index 0a7e011..905f4ec 100644 --- a/drivers/gpu/drm/drm_gem_cma_helper.c +++ b/drivers/gpu/drm/drm_gem_cma_helper.c @@ -26,10 +26,11 @@ #include <drm/drmP.h> #include <drm/drm.h> #include <drm/drm_gem_cma_helper.h> +#include <drm/drm_vma_manager.h>
static unsigned int get_gem_mmap_offset(struct drm_gem_object *obj) { - return (unsigned int)obj->map_list.hash.key << PAGE_SHIFT; + return (unsigned int)drm_vma_node_offset_addr(&obj->vma_node); }
static void drm_gem_cma_buf_destroy(struct drm_device *drm, @@ -140,7 +141,7 @@ void drm_gem_cma_free_object(struct drm_gem_object *gem_obj) { struct drm_gem_cma_object *cma_obj;
- if (gem_obj->map_list.map) + if (drm_vma_node_has_offset(&gem_obj->vma_node)) drm_gem_free_mmap_offset(gem_obj);
drm_gem_object_release(gem_obj); @@ -259,8 +260,8 @@ void drm_gem_cma_describe(struct drm_gem_cma_object *cma_obj, struct seq_file *m
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
- if (obj->map_list.map) - off = (uint64_t)obj->map_list.hash.key; + if (drm_vma_node_has_offset(&obj->vma_node)) + off = drm_vma_node_start(&obj->vma_node);
seq_printf(m, "%2d (%2d) %08llx %08Zx %p %d", obj->name, obj->refcount.refcount.counter, diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c index cf4543f..59488ea 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c @@ -10,6 +10,7 @@ */
#include <drm/drmP.h> +#include <drm/drm_vma_manager.h>
#include <linux/shmem_fs.h> #include <drm/exynos_drm.h> @@ -154,7 +155,7 @@ out: exynos_drm_fini_buf(obj->dev, buf); exynos_gem_obj->buffer = NULL;
- if (obj->map_list.map) + if (drm_vma_node_has_offset(&obj->vma_node)) drm_gem_free_mmap_offset(obj);
/* release file pointer to gem object. */ @@ -721,13 +722,13 @@ int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, goto unlock; }
- if (!obj->map_list.map) { + if (!drm_vma_node_has_offset(&obj->vma_node)) { ret = drm_gem_create_mmap_offset(obj); if (ret) goto out; }
- *offset = (u64)obj->map_list.hash.key << PAGE_SHIFT; + *offset = drm_vma_node_offset_addr(&obj->vma_node); DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset);
out: diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c index eefd6cc..9fd0c9f 100644 --- a/drivers/gpu/drm/gma500/gem.c +++ b/drivers/gpu/drm/gma500/gem.c @@ -26,6 +26,7 @@ #include <drm/drmP.h> #include <drm/drm.h> #include <drm/gma_drm.h> +#include <drm/drm_vma_manager.h> #include "psb_drv.h"
int psb_gem_init_object(struct drm_gem_object *obj) @@ -38,7 +39,7 @@ void psb_gem_free_object(struct drm_gem_object *obj) struct gtt_range *gtt = container_of(obj, struct gtt_range, gem);
/* Remove the list map if one is present */ - if (obj->map_list.map) + if (drm_vma_node_has_offset(&obj->vma_node)) drm_gem_free_mmap_offset(obj); drm_gem_object_release(obj);
@@ -81,13 +82,12 @@ int psb_gem_dumb_map_gtt(struct drm_file *file, struct drm_device *dev, /* What validation is needed here ? */
/* Make it mmapable */ - if (!obj->map_list.map) { + if (!drm_vma_node_has_offset(&obj->vma_node)) { ret = drm_gem_create_mmap_offset(obj); if (ret) goto out; } - /* GEM should really work out the hash offsets for us */ - *offset = (u64)obj->map_list.hash.key << PAGE_SHIFT; + *offset = drm_vma_node_offset_addr(&obj->vma_node); out: drm_gem_object_unreference(obj); unlock: diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 9e35daf..1617166 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -26,6 +26,7 @@ */
#include <drm/drmP.h> +#include <drm/drm_vma_manager.h> #include <drm/i915_drm.h> #include "i915_drv.h" #include "i915_trace.h" @@ -1428,7 +1429,7 @@ i915_gem_release_mmap(struct drm_i915_gem_object *obj)
if (obj->base.dev->dev_mapping) unmap_mapping_range(obj->base.dev->dev_mapping, - (loff_t)obj->base.map_list.hash.key<<PAGE_SHIFT, + (loff_t)drm_vma_node_offset_addr(&obj->base.vma_node), obj->base.size, 1);
obj->fault_mappable = false; @@ -1486,7 +1487,7 @@ static int i915_gem_object_create_mmap_offset(struct drm_i915_gem_object *obj) struct drm_i915_private *dev_priv = obj->base.dev->dev_private; int ret;
- if (obj->base.map_list.map) + if (drm_vma_node_has_offset(&obj->base.vma_node)) return 0;
dev_priv->mm.shrinker_no_lock_stealing = true; @@ -1517,7 +1518,7 @@ out:
static void i915_gem_object_free_mmap_offset(struct drm_i915_gem_object *obj) { - if (!obj->base.map_list.map) + if (!drm_vma_node_has_offset(&obj->base.vma_node)) return;
drm_gem_free_mmap_offset(&obj->base); @@ -1558,7 +1559,7 @@ i915_gem_mmap_gtt(struct drm_file *file, if (ret) goto out;
- *offset = (u64)obj->base.map_list.hash.key << PAGE_SHIFT; + *offset = drm_vma_node_offset_addr(&obj->base.vma_node);
out: drm_gem_object_unreference(&obj->base); diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c index ebbdf41..0bcfdb9 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem.c +++ b/drivers/gpu/drm/omapdrm/omap_gem.c @@ -20,6 +20,7 @@
#include <linux/spinlock.h> #include <linux/shmem_fs.h> +#include <drm/drm_vma_manager.h>
#include "omap_drv.h" #include "omap_dmm_tiler.h" @@ -311,7 +312,7 @@ static uint64_t mmap_offset(struct drm_gem_object *obj)
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
- if (!obj->map_list.map) { + if (!drm_vma_node_has_offset(&obj->vma_node)) { /* Make it mmapable */ size_t size = omap_gem_mmap_size(obj); int ret = _drm_gem_create_mmap_offset_size(obj, size); @@ -322,7 +323,7 @@ static uint64_t mmap_offset(struct drm_gem_object *obj) } }
- return (uint64_t)obj->map_list.hash.key << PAGE_SHIFT; + return drm_vma_node_offset_addr(&obj->vma_node); }
uint64_t omap_gem_mmap_offset(struct drm_gem_object *obj) @@ -1001,8 +1002,8 @@ void omap_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
- if (obj->map_list.map) - off = (uint64_t)obj->map_list.hash.key; + if (drm_vma_node_has_offset(&obj->vma_node)) + off = drm_vma_node_start(&obj->vma_node);
seq_printf(m, "%08x: %2d (%2d) %08llx %08Zx (%2d) %p %4d", omap_obj->flags, obj->name, obj->refcount.refcount.counter, @@ -1309,7 +1310,7 @@ void omap_gem_free_object(struct drm_gem_object *obj)
list_del(&omap_obj->mm_list);
- if (obj->map_list.map) + if (drm_vma_node_has_offset(&obj->vma_node)) drm_gem_free_mmap_offset(obj);
/* this means the object is still pinned.. which really should diff --git a/drivers/gpu/drm/omapdrm/omap_gem_helpers.c b/drivers/gpu/drm/omapdrm/omap_gem_helpers.c index f9eb679..dbb1575 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem_helpers.c +++ b/drivers/gpu/drm/omapdrm/omap_gem_helpers.c @@ -118,52 +118,7 @@ _drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size) { struct drm_device *dev = obj->dev; struct drm_gem_mm *mm = dev->mm_private; - struct drm_map_list *list; - struct drm_local_map *map; - int ret = 0; - - /* Set the object up for mmap'ing */ - list = &obj->map_list; - list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL); - if (!list->map) - return -ENOMEM; - - map = list->map; - map->type = _DRM_GEM; - map->size = size; - map->handle = obj; - - /* Get a DRM GEM mmap offset allocated... */ - list->file_offset_node = drm_mm_search_free(&mm->offset_manager, - size / PAGE_SIZE, 0, 0); - - if (!list->file_offset_node) { - DRM_ERROR("failed to allocate offset for bo %d\n", obj->name); - ret = -ENOSPC; - goto out_free_list; - } - - list->file_offset_node = drm_mm_get_block(list->file_offset_node, - size / PAGE_SIZE, 0); - if (!list->file_offset_node) { - ret = -ENOMEM; - goto out_free_list; - } - - list->hash.key = list->file_offset_node->start; - ret = drm_ht_insert_item(&mm->offset_hash, &list->hash); - if (ret) { - DRM_ERROR("failed to add to map hash\n"); - goto out_free_mm; - } - - return 0; - -out_free_mm: - drm_mm_put_block(list->file_offset_node); -out_free_list: - kfree(list->map); - list->map = NULL;
- return ret; + return drm_vma_offset_add(&mm->vma_manager, &obj->vma_node, + size / PAGE_SIZE); } diff --git a/drivers/gpu/drm/udl/udl_gem.c b/drivers/gpu/drm/udl/udl_gem.c index ef034fa..59aee8a 100644 --- a/drivers/gpu/drm/udl/udl_gem.c +++ b/drivers/gpu/drm/udl/udl_gem.c @@ -223,7 +223,7 @@ void udl_gem_free_object(struct drm_gem_object *gem_obj) if (obj->pages) udl_gem_put_pages(obj);
- if (gem_obj->map_list.map) + if (drm_vma_node_has_offset(&gem_obj->vma_node)) drm_gem_free_mmap_offset(gem_obj); }
@@ -247,13 +247,13 @@ int udl_gem_mmap(struct drm_file *file, struct drm_device *dev, ret = udl_gem_get_pages(gobj, GFP_KERNEL); if (ret) goto out; - if (!gobj->base.map_list.map) { + if (!drm_vma_node_has_offset(&gobj->base.vma_node)) { ret = drm_gem_create_mmap_offset(obj); if (ret) goto out; }
- *offset = (u64)gobj->base.map_list.hash.key << PAGE_SHIFT; + *offset = drm_vma_node_offset_addr(&gobj->base.vma_node);
out: drm_gem_object_unreference(&gobj->base); diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 63d17ee..79ea723 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -74,6 +74,7 @@ #include <asm/pgalloc.h> #include <drm/drm.h> #include <drm/drm_sarea.h> +#include <drm/drm_vma_manager.h>
#include <linux/idr.h>
@@ -590,7 +591,6 @@ struct drm_map_list { struct drm_local_map *map; /**< mapping */ uint64_t user_token; struct drm_master *master; - struct drm_mm_node *file_offset_node; /**< fake offset */ };
/** @@ -625,8 +625,7 @@ struct drm_ati_pcigart_info { * GEM specific mm private for tracking GEM objects */ struct drm_gem_mm { - struct drm_mm offset_manager; /**< Offset mgmt for buffer objects */ - struct drm_open_hash offset_hash; /**< User token hash table for maps */ + struct drm_vma_offset_manager vma_manager; };
/** @@ -647,7 +646,7 @@ struct drm_gem_object { struct file *filp;
/* Mapping info for this object */ - struct drm_map_list map_list; + struct drm_vma_offset_node vma_node;
/** * Size of the object, in bytes. Immutable over the object's diff --git a/include/drm/drm_vma_manager.h b/include/drm/drm_vma_manager.h index 8a1975c..4d6a734 100644 --- a/include/drm/drm_vma_manager.h +++ b/include/drm/drm_vma_manager.h @@ -23,7 +23,6 @@ * OTHER DEALINGS IN THE SOFTWARE. */
-#include <drm/drmP.h> #include <drm/drm_mm.h> #include <linux/module.h> #include <linux/rbtree.h> diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h index 5a57be6..1d1c6f0 100644 --- a/include/uapi/drm/drm.h +++ b/include/uapi/drm/drm.h @@ -181,7 +181,7 @@ enum drm_map_type { _DRM_AGP = 3, /**< AGP/GART */ _DRM_SCATTER_GATHER = 4, /**< Scatter/gather memory for PCI DMA */ _DRM_CONSISTENT = 5, /**< Consistent memory for PCI DMA */ - _DRM_GEM = 6, /**< GEM object */ + _DRM_GEM = 6, /**< GEM object (obsolete) */ };
/**