Commit a2b9d4ea authored by Dominic Chen's avatar Dominic Chen Committed by Moritz Fischer
Browse files

fpga: dfl: afu: support debug access to memory-mapped afu regions 



Allow debug access to memory-mapped regions using e.g. gdb.

Signed-off-by: default avatarDominic Chen <d.c.ddcc@gmail.com>
Acked-by: default avatarWu Hao <hao.wu@intel.com>
Signed-off-by: default avatarMoritz Fischer <mdf@kernel.org>
parent 5a538815

drivers/fpga/dfl-afu-main.c

+9 −0
Original line number Diff line number Diff line
@@ -750,6 +750,12 @@ static long afu_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 
	return -EINVAL;

}



static const struct vm_operations_struct afu_vma_ops = {

#ifdef CONFIG_HAVE_IOREMAP_PROT

	.access = generic_access_phys,

#endif

};



static int afu_mmap(struct file *filp, struct vm_area_struct *vma)

{

	struct platform_device *pdev = filp->private_data;
@@ -779,6 +785,9 @@ static int afu_mmap(struct file *filp, struct vm_area_struct *vma) 
	    !(region.flags & DFL_PORT_REGION_WRITE))

		return -EPERM;



	/* Support debug access to the mapping */

	vma->vm_ops = &afu_vma_ops;



	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);



	return remap_pfn_range(vma, vma->vm_start,

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