From 32d1f6985ceb6b9099bc9e02dc04e58660f28c16 Mon Sep 17 00:00:00 2001 From: Thomas Hellstrom Date: Fri, 12 Oct 2018 17:16:39 +0200 Subject: [PATCH] drm/ttm: Allow the driver to provide the ttm struct vm_operations_struct MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Add a pointer to the struct vm_operations_struct in the bo_device, and assign that pointer to the default value currently used. The driver can then optionally modify that pointer and the new value can be used for each new vma created. Cc: "Christian König" Signed-off-by: Thomas Hellstrom Reviewed-by: Christian König --- drivers/gpu/drm/ttm/ttm_bo.c | 1 + drivers/gpu/drm/ttm/ttm_bo_vm.c | 6 +++--- include/drm/ttm/ttm_bo_driver.h | 6 ++++++ 3 files changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index c7de667..6953dd2 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -1739,6 +1739,7 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev, mutex_lock(&ttm_global_mutex); list_add_tail(&bdev->device_list, &glob->device_list); mutex_unlock(&ttm_global_mutex); + bdev->vm_ops = &ttm_bo_vm_ops; return 0; out_no_sys: diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c index 6dacff4..196e13a 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c @@ -395,7 +395,7 @@ static int ttm_bo_vm_access(struct vm_area_struct *vma, unsigned long addr, return ret; } -static const struct vm_operations_struct ttm_bo_vm_ops = { +const struct vm_operations_struct ttm_bo_vm_ops = { .fault = ttm_bo_vm_fault, .open = ttm_bo_vm_open, .close = ttm_bo_vm_close, @@ -448,7 +448,7 @@ int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma, if (unlikely(ret != 0)) goto out_unref; - vma->vm_ops = &ttm_bo_vm_ops; + vma->vm_ops = bdev->vm_ops; /* * Note: We're transferring the bo reference to @@ -480,7 +480,7 @@ int ttm_fbdev_mmap(struct vm_area_struct *vma, struct ttm_buffer_object *bo) ttm_bo_get(bo); - vma->vm_ops = &ttm_bo_vm_ops; + vma->vm_ops = bo->bdev->vm_ops; vma->vm_private_data = bo; vma->vm_flags |= VM_MIXEDMAP; vma->vm_flags |= VM_IO | VM_DONTEXPAND; diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h index c9b8ba4..a2d810a 100644 --- a/include/drm/ttm/ttm_bo_driver.h +++ b/include/drm/ttm/ttm_bo_driver.h @@ -442,6 +442,9 @@ extern struct ttm_bo_global { * @driver: Pointer to a struct ttm_bo_driver struct setup by the driver. * @man: An array of mem_type_managers. * @vma_manager: Address space manager + * @vm_ops: Pointer to the struct vm_operations_struct used for this + * device's VM operations. The driver may override this before the first + * mmap() call. * lru_lock: Spinlock that protects the buffer+device lru lists and * ddestroy lists. * @dev_mapping: A pointer to the struct address_space representing the @@ -460,6 +463,7 @@ struct ttm_bo_device { struct ttm_bo_global *glob; struct ttm_bo_driver *driver; struct ttm_mem_type_manager man[TTM_NUM_MEM_TYPES]; + const struct vm_operations_struct *vm_ops; /* * Protected by internal locks. @@ -488,6 +492,8 @@ struct ttm_bo_device { bool no_retry; }; +extern const struct vm_operations_struct ttm_bo_vm_ops; + /** * struct ttm_lru_bulk_move_pos * -- 2.7.4