[PATCH v4] drm/amdgpu : Add register read/write debugfs support for AID's

[Mangesh Gadre]

SMN address is larger than 32 bits for registers on different AID's
Updating existing interface to support access to such registers.

Signed-off-by: Mangesh Gadre <Mangesh.Gadre at amd.com>
Reviewed-by: Christian König <christian.koenig at amd.com>
---
v2 : Adding hardware family check for creating
     debugfs interface for PCIe register access
v3 : Instead of creating new debugfs interface,now using
     existing interface with address range check for
     call to appropriate interface (Lijo)
v4 : Using available helper instead of explicit right 
     shift operations (Christian)


 drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index 96d634bfa448..391af8060704 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -559,7 +559,11 @@ static ssize_t amdgpu_debugfs_regs_pcie_read(struct file *f, char __user *buf,
 	while (size) {
 		uint32_t value;
 
-		value = RREG32_PCIE(*pos);
+		if (upper_32_bits(*pos))
+			value = RREG32_PCIE_EXT(*pos);
+		else
+			value = RREG32_PCIE(*pos);
+
 		r = put_user(value, (uint32_t *)buf);
 		if (r)
 			goto out;
@@ -619,7 +623,10 @@ static ssize_t amdgpu_debugfs_regs_pcie_write(struct file *f, const char __user
 		if (r)
 			goto out;
 
-		WREG32_PCIE(*pos, value);
+		if (upper_32_bits(*pos))
+			WREG32_PCIE_EXT(*pos, value);
+		else
+			WREG32_PCIE(*pos, value);
 
 		result += 4;
 		buf += 4;
-- 
2.34.1