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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/gpu/drm/qxl/qxl_ioctl.c
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@@ -23,6 +23,9 @@
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  *          Alon Levy
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  */
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+#include <linux/pci.h>
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+#include <linux/uaccess.h>
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+
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 #include "qxl_drv.h"
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 #include "qxl_object.h"
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@@ -33,7 +36,7 @@
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 static int qxl_alloc_ioctl(struct drm_device *dev, void *data,
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 			   struct drm_file *file_priv)
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 {
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-	struct qxl_device *qdev = dev->dev_private;
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+	struct qxl_device *qdev = to_qxl(dev);
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 	struct drm_qxl_alloc *qxl_alloc = data;
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 	int ret;
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 	struct qxl_bo *qobj;
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@@ -61,7 +64,7 @@
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 static int qxl_map_ioctl(struct drm_device *dev, void *data,
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 			 struct drm_file *file_priv)
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 {
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-	struct qxl_device *qdev = dev->dev_private;
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+	struct qxl_device *qdev = to_qxl(dev);
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 	struct drm_qxl_map *qxl_map = data;
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 	return qxl_mode_dumb_mmap(file_priv, &qdev->ddev, qxl_map->handle,
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@@ -85,11 +88,12 @@
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 apply_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
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 {
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 	void *reloc_page;
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-	reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
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+
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+	reloc_page = qxl_bo_kmap_local_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
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 	*(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
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 											      info->src_bo,
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 											      info->src_offset);
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-	qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
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+	qxl_bo_kunmap_local_page(qdev, info->dst_bo, reloc_page);
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 }
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 static void
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@@ -101,9 +105,9 @@
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 	if (info->src_bo && !info->src_bo->is_primary)
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 		id = info->src_bo->surface_id;
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-	reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
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+	reloc_page = qxl_bo_kmap_local_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
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 	*(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
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-	qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
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+	qxl_bo_kunmap_local_page(qdev, info->dst_bo, reloc_page);
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 }
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 /* return holding the reference to this object */
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@@ -121,7 +125,7 @@
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 	qobj = gem_to_qxl_bo(gobj);
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126
 
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 	ret = qxl_release_list_add(release, qobj);
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-	drm_gem_object_put_unlocked(gobj);
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+	drm_gem_object_put(gobj);
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 	if (ret)
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 		return ret;
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@@ -145,7 +149,6 @@
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 	struct qxl_bo *cmd_bo;
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 	void *fb_cmd;
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 	int i, ret, num_relocs;
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-	int unwritten;
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 	switch (cmd->type) {
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 	case QXL_CMD_DRAW:
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@@ -162,8 +165,7 @@
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 	if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
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 		return -EINVAL;
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-	if (!access_ok(VERIFY_READ,
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-		       u64_to_user_ptr(cmd->command),
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+	if (!access_ok(u64_to_user_ptr(cmd->command),
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 		       cmd->command_size))
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 		return -EFAULT;
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@@ -182,20 +184,21 @@
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 		goto out_free_reloc;
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 	/* TODO copy slow path code from i915 */
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-	fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_MASK));
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-	unwritten = __copy_from_user_inatomic_nocache
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-		(fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK),
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-		 u64_to_user_ptr(cmd->command), cmd->command_size);
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+	fb_cmd = qxl_bo_kmap_local_page(qdev, cmd_bo, (release->release_offset & PAGE_MASK));
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-	{
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+	if (copy_from_user(fb_cmd + sizeof(union qxl_release_info) +
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+			   (release->release_offset & ~PAGE_MASK),
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+			   u64_to_user_ptr(cmd->command), cmd->command_size)) {
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+		ret = -EFAULT;
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+	} else {
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 		struct qxl_drawable *draw = fb_cmd;
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+
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 		draw->mm_time = qdev->rom->mm_clock;
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 	}
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-	qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
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-	if (unwritten) {
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-		DRM_ERROR("got unwritten %d\n", unwritten);
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-		ret = -EFAULT;
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+	qxl_bo_kunmap_local_page(qdev, cmd_bo, fb_cmd);
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+	if (ret) {
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+		DRM_ERROR("copy from user failed %d\n", ret);
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 		goto out_free_release;
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 	}
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@@ -272,7 +275,7 @@
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 static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
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 				struct drm_file *file_priv)
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 {
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-	struct qxl_device *qdev = dev->dev_private;
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+	struct qxl_device *qdev = to_qxl(dev);
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 	struct drm_qxl_execbuffer *execbuffer = data;
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 	struct drm_qxl_command user_cmd;
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 	int cmd_num;
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@@ -297,7 +300,7 @@
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 static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
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 				 struct drm_file *file)
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 {
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-	struct qxl_device *qdev = dev->dev_private;
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+	struct qxl_device *qdev = to_qxl(dev);
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 	struct drm_qxl_update_area *update_area = data;
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 	struct qxl_rect area = {.left = update_area->left,
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 				.top = update_area->top,
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@@ -318,7 +321,7 @@
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 	qobj = gem_to_qxl_bo(gobj);
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-	ret = qxl_bo_reserve(qobj, false);
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+	ret = qxl_bo_reserve(qobj);
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 	if (ret)
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 		goto out;
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@@ -340,14 +343,14 @@
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 	qxl_bo_unreserve(qobj);
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 out:
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-	drm_gem_object_put_unlocked(gobj);
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+	drm_gem_object_put(gobj);
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 	return ret;
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 }
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 static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
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 		       struct drm_file *file_priv)
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 {
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-	struct qxl_device *qdev = dev->dev_private;
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+	struct qxl_device *qdev = to_qxl(dev);
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 	struct drm_qxl_getparam *param = data;
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 	switch (param->param) {
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@@ -366,7 +369,7 @@
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 static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
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 				  struct drm_file *file_priv)
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 {
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-	struct qxl_device *qdev = dev->dev_private;
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+	struct qxl_device *qdev = to_qxl(dev);
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 	struct drm_qxl_clientcap *param = data;
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 	int byte, idx;
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@@ -387,7 +390,7 @@
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 static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
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 				struct drm_file *file)
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 {
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-	struct qxl_device *qdev = dev->dev_private;
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+	struct qxl_device *qdev = to_qxl(dev);
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 	struct drm_qxl_alloc_surf *param = data;
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 	struct qxl_bo *qobj;
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 	int handle;