gpu: nvgpu: Fix build for Linux v6.3

Upstream Linux commit bc292ab00f6c ("(HEAD) mm: introduce vma->vm_flags
wrapper functions") breaking building the NVGPU driver because the
vm_flags variable is made a const and can no longer be set directly. Fix
the build for Linux v6.3 by using the helper functions for setting the
flags.

Bug 4014315

Change-Id: Ie58d1f43b59167869742ff01ffe4e1841dbb1d6e
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2867167
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/os/linux/debug_gr.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2022, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2017-2023, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -27,6 +27,7 @@
 #include <linux/uaccess.h>
 #include <linux/capability.h>
 #include <linux/debugfs.h>
+#include <linux/version.h>
 
 #ifdef CONFIG_NVGPU_COMPRESSION
 static int cbc_status_debug_show(struct seq_file *s, void *unused)
@@ -245,9 +246,15 @@ static int cbc_ctrl_debug_mmap_cbc_store(struct file *f, struct vm_area_struct *
 		err = -EINVAL;
 		goto done;
 	}
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
+	vm_flags_set(vma, VM_DONTCOPY | VM_DONTEXPAND | VM_NORESERVE |
+			 VM_DONTDUMP | VM_PFNMAP);
+	vm_flags_clear(vma, VM_MAYWRITE);
+#else
 	vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND | VM_NORESERVE |
 			 VM_DONTDUMP | VM_PFNMAP;
 	vma->vm_flags &= ~VM_MAYWRITE;
+#endif
 	cbc_store_pa = nvgpu_mem_get_addr(g, &cbc->compbit_store.mem);
 	err = remap_pfn_range(vma, vma->vm_start, cbc_store_pa >> PAGE_SHIFT,
 			      mapping_size, prot);

drivers/gpu/nvgpu/os/linux/dmabuf_nvs.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2022-2023, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -144,11 +144,20 @@ static int nvgpu_nvs_buf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma
 
 	nvgpu_nvs_ctrl_fifo_lock_queues(g);
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
+	vm_flags_set(vma, VM_DONTCOPY | VM_DONTEXPAND | VM_NORESERVE |
+		VM_DONTDUMP);
+#else
 	vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND | VM_NORESERVE |
 		VM_DONTDUMP;
+#endif
 
 	if (buf->mask == NVGPU_NVS_CTRL_FIFO_QUEUE_CLIENT_EVENTS_READ) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
+		vm_flags_set(vma, VM_SHARED);
+#else
 		vma->vm_flags |= VM_SHARED;
+#endif
 	}
 
 	vm_ops_old = vma->vm_ops;

drivers/gpu/nvgpu/os/linux/ioctl_ctrl.c

@@ -14,6 +14,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <linux/version.h>
 #include <linux/uaccess.h>
 #include <linux/cdev.h>
 #include <linux/file.h>
@@ -2723,8 +2724,13 @@ int gk20a_ctrl_dev_mmap(struct file *filp, struct vm_area_struct *vma)
 
 	nvgpu_mutex_acquire(&l->ctrl_privs_lock);
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
+	vm_flags_set(vma, VM_IO | VM_DONTCOPY | VM_DONTEXPAND | VM_NORESERVE |
+		VM_DONTDUMP | VM_PFNMAP);
+#else
 	vma->vm_flags |= VM_IO | VM_DONTCOPY | VM_DONTEXPAND | VM_NORESERVE |
 		VM_DONTDUMP | VM_PFNMAP;
+#endif
 	vma->vm_ops = &usermode_vma_ops;
 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);