diff options
Diffstat (limited to 'drivers/mfd/glamo/glamo-buffer.c')
| -rw-r--r-- | drivers/mfd/glamo/glamo-buffer.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/drivers/mfd/glamo/glamo-buffer.c b/drivers/mfd/glamo/glamo-buffer.c new file mode 100644 index 00000000000..945824a1b15 --- /dev/null +++ b/drivers/mfd/glamo/glamo-buffer.c @@ -0,0 +1,198 @@ +/* + * SMedia Glamo 336x/337x memory management + * + * Copyright (c) 2009 Thomas White <taw@bitwiz.org.uk> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + */ + + +#include <drm/drmP.h> +#include <drm/glamo_drm.h> + +#include "glamo-drm-private.h" + + +int glamo_ioctl_gem_create(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_glamo_gem_create *args = data; + struct drm_gem_object *obj; + struct glamodrm_handle *gdrm; + struct drm_glamo_gem_object *gobj; + int handle, ret; + + gdrm = dev->dev_private; + + args->size = roundup(args->size, PAGE_SIZE); + + obj = drm_gem_object_alloc(dev, args->size); + if (obj == NULL) return -ENOMEM; + + gobj = obj->driver_private; + + /* Allocate memory for this object in VRAM */ + gobj->block = drm_mm_search_free(gdrm->mmgr, args->size, + args->alignment, 1); + if (!gobj->block) { + ret = -ENOMEM; + goto fail; + } + gobj->block = drm_mm_get_block(gobj->block, args->size, + args->alignment); + if (!gobj->block) { + ret = -ENOMEM; + goto fail; + } + + ret = drm_gem_handle_create(file_priv, obj, &handle); + mutex_lock(&dev->struct_mutex); + drm_gem_object_handle_unreference(obj); + mutex_unlock(&dev->struct_mutex); + + if (ret) goto fail; + + printk(KERN_INFO "[glamo-drm] GEM object %i: %li bytes at 0x%lx\n", + handle, gobj->block->size, gobj->block->start); + args->handle = handle; + + return 0; + +fail: + mutex_lock(&dev->struct_mutex); + drm_gem_object_unreference(obj); + mutex_unlock(&dev->struct_mutex); + printk(KERN_INFO "[glamo-drm] Failed to allocate object\n"); + + return ret; +} + + +int glamo_ioctl_gem_mmap(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_glamo_gem_mmap *args = data; + struct drm_gem_object *obj; + loff_t offset; + unsigned long addr; + + obj = drm_gem_object_lookup(dev, file_priv, args->handle); + if (obj == NULL) + return -EBADF; + + offset = args->offset; + + down_write(¤t->mm->mmap_sem); + addr = do_mmap(obj->filp, 0, args->size, + PROT_READ | PROT_WRITE, MAP_SHARED, + args->offset); + up_write(¤t->mm->mmap_sem); + mutex_lock(&dev->struct_mutex); + drm_gem_object_unreference(obj); + mutex_unlock(&dev->struct_mutex); + if (IS_ERR((void *)addr)) + return addr; + + args->addr_ptr = (uint64_t) addr; + + return 0; +} + + +int glamo_ioctl_gem_pin(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + printk(KERN_INFO "glamo_ioctl_gem_pin\n"); + return 0; +} + + +int glamo_ioctl_gem_unpin(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + printk(KERN_INFO "glamo_ioctl_gem_unpin\n"); + return 0; +} + + +int glamo_ioctl_gem_pread(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + printk(KERN_INFO "glamo_ioctl_gem_pread\n"); + return 0; +} + + +int glamo_ioctl_gem_pwrite(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + printk(KERN_INFO "glamo_ioctl_gem_pwrite\n"); + return 0; +} + + +int glamodrm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) +{ + return VM_FAULT_SIGBUS; +} + + +int glamodrm_gem_init_object(struct drm_gem_object *obj) +{ + struct drm_glamo_gem_object *gobj; + + /* Allocate a private structure */ + gobj = drm_calloc(1, sizeof(*gobj), DRM_MEM_DRIVER); + if (!gobj) return -ENOMEM; + + obj->driver_private = gobj; + gobj->obj = obj; + + return 0; +} + + +void glamodrm_gem_free_object(struct drm_gem_object *obj) +{ + struct drm_glamo_gem_object *gobj; + + gobj = obj->driver_private; + + /* Free the VRAM */ + drm_mm_put_block(gobj->block); + + /* Free the private structure */ + drm_free(obj->driver_private, 1, DRM_MEM_DRIVER); +} + + +/* Memory management initialisation */ +int glamo_buffer_init(struct glamodrm_handle *gdrm) +{ + gdrm->mmgr = drm_calloc(1, sizeof(struct drm_mm), DRM_MEM_DRIVER); + drm_mm_init(gdrm->mmgr, 0, gdrm->vram_size); + return 0; +} + + +/* Memory management finalisation */ +int glamo_buffer_final(struct glamodrm_handle *gdrm) +{ + drm_mm_takedown(gdrm->mmgr); + drm_free(gdrm->mmgr , 1, DRM_MEM_DRIVER); + return 0; +} |