media: atomisp: Drop userptr support from hmm

After the conversion to videobuf2 userptr support is no longer needed,
drop it.
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/atomisp/include/hmm/hmm.h

@@ -37,7 +37,6 @@ int hmm_init(void);
 void hmm_cleanup(void);
 
 ia_css_ptr hmm_alloc(size_t bytes);
-ia_css_ptr hmm_create_from_userdata(size_t bytes, const void __user *userptr);
 ia_css_ptr hmm_create_from_vmalloc_buf(size_t bytes, void *vmalloc_addr);
 
 void hmm_free(ia_css_ptr ptr);

drivers/staging/media/atomisp/include/hmm/hmm_bo.h

@@ -74,7 +74,6 @@
 enum hmm_bo_type {
 	HMM_BO_PRIVATE,
 	HMM_BO_VMALLOC,
-	HMM_BO_USER,
 	HMM_BO_LAST,
 };
 
@@ -208,7 +207,6 @@ int hmm_bo_allocated(struct hmm_buffer_object *bo);
  */
 int hmm_bo_alloc_pages(struct hmm_buffer_object *bo,
 		       enum hmm_bo_type type,
-		       const void __user *userptr,
 		       void *vmalloc_addr);
 void hmm_bo_free_pages(struct hmm_buffer_object *bo);
 int hmm_bo_page_allocated(struct hmm_buffer_object *bo);

drivers/staging/media/atomisp/pci/hmm/hmm.c

@@ -42,9 +42,8 @@ static bool hmm_initialized;
 /*
  * p: private
  * v: vmalloc
- * u: user
  */
-static const char hmm_bo_type_string[] = "pvu";
+static const char hmm_bo_type_string[] = "pv";
 
 static ssize_t bo_show(struct device *dev, struct device_attribute *attr,
 		       char *buf, struct list_head *bo_list, bool active)
@@ -168,7 +167,6 @@ void hmm_cleanup(void)
 }
 
 static ia_css_ptr __hmm_alloc(size_t bytes, enum hmm_bo_type type,
-			      const void __user *userptr,
 			      void *vmalloc_addr)
 {
 	unsigned int pgnr;
@@ -193,7 +191,7 @@ static ia_css_ptr __hmm_alloc(size_t bytes, enum hmm_bo_type type,
 	}
 
 	/* Allocate pages for memory */
-	ret = hmm_bo_alloc_pages(bo, type, userptr, vmalloc_addr);
+	ret = hmm_bo_alloc_pages(bo, type, vmalloc_addr);
 	if (ret) {
 		dev_err(atomisp_dev, "hmm_bo_alloc_pages failed.\n");
 		goto alloc_page_err;
@@ -206,9 +204,8 @@ static ia_css_ptr __hmm_alloc(size_t bytes, enum hmm_bo_type type,
 		goto bind_err;
 	}
 
-	dev_dbg(atomisp_dev,
-		"%s: pages: 0x%08x (%zu bytes), type: %d, user ptr %p\n",
-		__func__, bo->start, bytes, type, userptr);
+	dev_dbg(atomisp_dev, "pages: 0x%08x (%zu bytes), type: %d, vmalloc %p\n",
+		bo->start, bytes, type, vmalloc);
 
 	return bo->start;
 
@@ -222,17 +219,12 @@ static ia_css_ptr __hmm_alloc(size_t bytes, enum hmm_bo_type type,
 
 ia_css_ptr hmm_alloc(size_t bytes)
 {
-	return __hmm_alloc(bytes, HMM_BO_PRIVATE, NULL, NULL);
+	return __hmm_alloc(bytes, HMM_BO_PRIVATE, NULL);
 }
 
 ia_css_ptr hmm_create_from_vmalloc_buf(size_t bytes, void *vmalloc_addr)
 {
-	return __hmm_alloc(bytes, HMM_BO_VMALLOC, NULL, vmalloc_addr);
-}
-
-ia_css_ptr hmm_create_from_userdata(size_t bytes, const void __user *userptr)
-{
-	return __hmm_alloc(bytes, HMM_BO_USER, userptr, NULL);
+	return __hmm_alloc(bytes, HMM_BO_VMALLOC, vmalloc_addr);
 }
 
 void hmm_free(ia_css_ptr virt)

drivers/staging/media/atomisp/pci/hmm/hmm_bo.c

@@ -652,49 +652,6 @@ static int alloc_private_pages(struct hmm_buffer_object *bo)
 	return 0;
 }
 
-static void free_user_pages(struct hmm_buffer_object *bo,
-			    unsigned int page_nr)
-{
-	int i;
-
-	for (i = 0; i < page_nr; i++)
-		put_page(bo->pages[i]);
-}
-
-/*
- * Convert user space virtual address into pages list
- */
-static int alloc_user_pages(struct hmm_buffer_object *bo,
-			    const void __user *userptr)
-{
-	int page_nr;
-
-	userptr = untagged_addr(userptr);
-
-	/* Handle frame buffer allocated in user space */
-	mutex_unlock(&bo->mutex);
-	page_nr = get_user_pages_fast((unsigned long)userptr, bo->pgnr, 1, bo->pages);
-	mutex_lock(&bo->mutex);
-
-	/* can be written by caller, not forced */
-	if (page_nr != bo->pgnr) {
-		dev_err(atomisp_dev,
-			"get_user_pages err: bo->pgnr = %d, pgnr actually pinned = %d.\n",
-			bo->pgnr, page_nr);
-		if (page_nr < 0)
-			page_nr = 0;
-		goto out_of_mem;
-	}
-
-	return 0;
-
-out_of_mem:
-
-	free_user_pages(bo, page_nr);
-
-	return -ENOMEM;
-}
-
 static int alloc_vmalloc_pages(struct hmm_buffer_object *bo, void *vmalloc_addr)
 {
 	void *vaddr = vmalloc_addr;
@@ -716,16 +673,12 @@ static int alloc_vmalloc_pages(struct hmm_buffer_object *bo, void *vmalloc_addr)
  * allocate/free physical pages for the bo.
  *
  * type indicate where are the pages from. currently we have 3 types
- * of memory: HMM_BO_PRIVATE, HMM_BO_VMALLOC, HMM_BO_USER.
+ * of memory: HMM_BO_PRIVATE, HMM_BO_VMALLOC.
  *
  * vmalloc_addr is only valid when type is HMM_BO_VMALLOC.
- *
- * userptr is only valid when type is HMM_BO_USER, it indicates
- * the start address from user space task.
  */
 int hmm_bo_alloc_pages(struct hmm_buffer_object *bo,
 		       enum hmm_bo_type type,
-		       const void __user *userptr,
 		       void *vmalloc_addr)
 {
 	int ret = -EINVAL;
@@ -745,8 +698,6 @@ int hmm_bo_alloc_pages(struct hmm_buffer_object *bo,
 		ret = alloc_private_pages(bo);
 	} else if (type == HMM_BO_VMALLOC) {
 		ret = alloc_vmalloc_pages(bo, vmalloc_addr);
-	} else if (type == HMM_BO_USER) {
-		ret = alloc_user_pages(bo, userptr);
 	} else {
 		dev_err(atomisp_dev, "invalid buffer type.\n");
 		ret = -EINVAL;
@@ -792,8 +743,6 @@ void hmm_bo_free_pages(struct hmm_buffer_object *bo)
 		free_private_bo_pages(bo);
 	else if (bo->type == HMM_BO_VMALLOC)
 		; /* No-op, nothing to do */
-	else if (bo->type == HMM_BO_USER)
-		free_user_pages(bo, bo->pgnr);
 	else
 		dev_err(atomisp_dev, "invalid buffer type.\n");