diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/gpu/drm/udl/udl_gem.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/gpu/drm/udl/udl_gem.c')
-rw-r--r-- | kernel/drivers/gpu/drm/udl/udl_gem.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/udl/udl_gem.c b/kernel/drivers/gpu/drm/udl/udl_gem.c new file mode 100644 index 000000000..2a0a784ab --- /dev/null +++ b/kernel/drivers/gpu/drm/udl/udl_gem.c @@ -0,0 +1,241 @@ +/* + * Copyright (C) 2012 Red Hat + * + * This file is subject to the terms and conditions of the GNU General Public + * License v2. See the file COPYING in the main directory of this archive for + * more details. + */ + +#include <drm/drmP.h> +#include "udl_drv.h" +#include <linux/shmem_fs.h> +#include <linux/dma-buf.h> + +struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev, + size_t size) +{ + struct udl_gem_object *obj; + + obj = kzalloc(sizeof(*obj), GFP_KERNEL); + if (obj == NULL) + return NULL; + + if (drm_gem_object_init(dev, &obj->base, size) != 0) { + kfree(obj); + return NULL; + } + + obj->flags = UDL_BO_CACHEABLE; + return obj; +} + +static int +udl_gem_create(struct drm_file *file, + struct drm_device *dev, + uint64_t size, + uint32_t *handle_p) +{ + struct udl_gem_object *obj; + int ret; + u32 handle; + + size = roundup(size, PAGE_SIZE); + + obj = udl_gem_alloc_object(dev, size); + if (obj == NULL) + return -ENOMEM; + + ret = drm_gem_handle_create(file, &obj->base, &handle); + if (ret) { + drm_gem_object_release(&obj->base); + kfree(obj); + return ret; + } + + drm_gem_object_unreference(&obj->base); + *handle_p = handle; + return 0; +} + +static void update_vm_cache_attr(struct udl_gem_object *obj, + struct vm_area_struct *vma) +{ + DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags); + + /* non-cacheable as default. */ + if (obj->flags & UDL_BO_CACHEABLE) { + vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); + } else if (obj->flags & UDL_BO_WC) { + vma->vm_page_prot = + pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); + } else { + vma->vm_page_prot = + pgprot_noncached(vm_get_page_prot(vma->vm_flags)); + } +} + +int udl_dumb_create(struct drm_file *file, + struct drm_device *dev, + struct drm_mode_create_dumb *args) +{ + args->pitch = args->width * DIV_ROUND_UP(args->bpp, 8); + args->size = args->pitch * args->height; + return udl_gem_create(file, dev, + args->size, &args->handle); +} + +int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) +{ + int ret; + + ret = drm_gem_mmap(filp, vma); + if (ret) + return ret; + + vma->vm_flags &= ~VM_PFNMAP; + vma->vm_flags |= VM_MIXEDMAP; + + update_vm_cache_attr(to_udl_bo(vma->vm_private_data), vma); + + return ret; +} + +int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) +{ + struct udl_gem_object *obj = to_udl_bo(vma->vm_private_data); + struct page *page; + unsigned int page_offset; + int ret = 0; + + page_offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >> + PAGE_SHIFT; + + if (!obj->pages) + return VM_FAULT_SIGBUS; + + page = obj->pages[page_offset]; + ret = vm_insert_page(vma, (unsigned long)vmf->virtual_address, page); + switch (ret) { + case -EAGAIN: + case 0: + case -ERESTARTSYS: + return VM_FAULT_NOPAGE; + case -ENOMEM: + return VM_FAULT_OOM; + default: + return VM_FAULT_SIGBUS; + } +} + +int udl_gem_get_pages(struct udl_gem_object *obj) +{ + struct page **pages; + + if (obj->pages) + return 0; + + pages = drm_gem_get_pages(&obj->base); + if (IS_ERR(pages)) + return PTR_ERR(pages); + + obj->pages = pages; + + return 0; +} + +void udl_gem_put_pages(struct udl_gem_object *obj) +{ + if (obj->base.import_attach) { + drm_free_large(obj->pages); + obj->pages = NULL; + return; + } + + drm_gem_put_pages(&obj->base, obj->pages, false, false); + obj->pages = NULL; +} + +int udl_gem_vmap(struct udl_gem_object *obj) +{ + int page_count = obj->base.size / PAGE_SIZE; + int ret; + + if (obj->base.import_attach) { + obj->vmapping = dma_buf_vmap(obj->base.import_attach->dmabuf); + if (!obj->vmapping) + return -ENOMEM; + return 0; + } + + ret = udl_gem_get_pages(obj); + if (ret) + return ret; + + obj->vmapping = vmap(obj->pages, page_count, 0, PAGE_KERNEL); + if (!obj->vmapping) + return -ENOMEM; + return 0; +} + +void udl_gem_vunmap(struct udl_gem_object *obj) +{ + if (obj->base.import_attach) { + dma_buf_vunmap(obj->base.import_attach->dmabuf, obj->vmapping); + return; + } + + vunmap(obj->vmapping); + + udl_gem_put_pages(obj); +} + +void udl_gem_free_object(struct drm_gem_object *gem_obj) +{ + struct udl_gem_object *obj = to_udl_bo(gem_obj); + + if (obj->vmapping) + udl_gem_vunmap(obj); + + if (gem_obj->import_attach) { + drm_prime_gem_destroy(gem_obj, obj->sg); + put_device(gem_obj->dev->dev); + } + + if (obj->pages) + udl_gem_put_pages(obj); + + drm_gem_free_mmap_offset(gem_obj); +} + +/* the dumb interface doesn't work with the GEM straight MMAP + interface, it expects to do MMAP on the drm fd, like normal */ +int udl_gem_mmap(struct drm_file *file, struct drm_device *dev, + uint32_t handle, uint64_t *offset) +{ + struct udl_gem_object *gobj; + struct drm_gem_object *obj; + int ret = 0; + + mutex_lock(&dev->struct_mutex); + obj = drm_gem_object_lookup(dev, file, handle); + if (obj == NULL) { + ret = -ENOENT; + goto unlock; + } + gobj = to_udl_bo(obj); + + ret = udl_gem_get_pages(gobj); + if (ret) + goto out; + ret = drm_gem_create_mmap_offset(obj); + if (ret) + goto out; + + *offset = drm_vma_node_offset_addr(&gobj->base.vma_node); + +out: + drm_gem_object_unreference(&gobj->base); +unlock: + mutex_unlock(&dev->struct_mutex); + return ret; +} |