[PATCH] amdgpu/soc15: make the pcie index/data registers constant.

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

These don't seem to change at runtime, and the initialisers
are constant data. This could be improved by not selecting
the apu/non-apu path on each pcie read/write access.

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c | 8 ++++----
 drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h | 2 +-
 drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c | 8 ++++----
 drivers/gpu/drm/amd/amdgpu/nbio_v7_0.h | 2 +-
 drivers/gpu/drm/amd/amdgpu/soc15.c     | 4 ++--
 5 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c
index 045988b..7723d7b 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c
@@ -216,7 +216,10 @@ void nbio_v6_1_get_clockgating_state(struct amdgpu_device *adev, u32 *flags)
 }
 
 struct nbio_hdp_flush_reg nbio_v6_1_hdp_flush_reg;
-struct nbio_pcie_index_data nbio_v6_1_pcie_index_data;
+const struct nbio_pcie_index_data nbio_v6_1_pcie_index_data = {
+	.index_offset = SOC15_REG_OFFSET(NBIO, 0, mmPCIE_INDEX),
+	.data_offset = SOC15_REG_OFFSET(NBIO, 0, mmPCIE_DATA),
+};
 
 int nbio_v6_1_init(struct amdgpu_device *adev)
 {
@@ -235,9 +238,6 @@ int nbio_v6_1_init(struct amdgpu_device *adev)
 	nbio_v6_1_hdp_flush_reg.ref_and_mask_sdma0 = BIF_BX_PF0_GPU_HDP_FLUSH_DONE__SDMA0_MASK;
 	nbio_v6_1_hdp_flush_reg.ref_and_mask_sdma1 = BIF_BX_PF0_GPU_HDP_FLUSH_DONE__SDMA1_MASK;
 
-	nbio_v6_1_pcie_index_data.index_offset = SOC15_REG_OFFSET(NBIO, 0, mmPCIE_INDEX);
-	nbio_v6_1_pcie_index_data.data_offset = SOC15_REG_OFFSET(NBIO, 0, mmPCIE_DATA);
-
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h
index 686e4b4..c5ca1e4 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.h
@@ -27,7 +27,7 @@
 #include "soc15_common.h"
 
 extern struct nbio_hdp_flush_reg nbio_v6_1_hdp_flush_reg;
-extern struct nbio_pcie_index_data nbio_v6_1_pcie_index_data;
+extern const struct nbio_pcie_index_data nbio_v6_1_pcie_index_data;
 int nbio_v6_1_init(struct amdgpu_device *adev);
 u32 nbio_v6_1_get_atombios_scratch_regs(struct amdgpu_device *adev,
                                         uint32_t idx);
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c
index 11b70d6..b932b78 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c
@@ -186,7 +186,10 @@ void nbio_v7_0_ih_control(struct amdgpu_device *adev)
 }
 
 struct nbio_hdp_flush_reg nbio_v7_0_hdp_flush_reg;
-struct nbio_pcie_index_data nbio_v7_0_pcie_index_data;
+const struct nbio_pcie_index_data nbio_v7_0_pcie_index_data = {
+	.index_offset = SOC15_REG_OFFSET(NBIO, 0, mmPCIE_INDEX2),
+	.data_offset = SOC15_REG_OFFSET(NBIO, 0, mmPCIE_DATA2)
+};
 
 int nbio_v7_0_init(struct amdgpu_device *adev)
 {
@@ -205,8 +208,5 @@ int nbio_v7_0_init(struct amdgpu_device *adev)
 	nbio_v7_0_hdp_flush_reg.ref_and_mask_sdma0 = GPU_HDP_FLUSH_DONE__SDMA0_MASK;
 	nbio_v7_0_hdp_flush_reg.ref_and_mask_sdma1 = GPU_HDP_FLUSH_DONE__SDMA1_MASK;
 
-	nbio_v7_0_pcie_index_data.index_offset = SOC15_REG_OFFSET(NBIO, 0, mmPCIE_INDEX2);
-	nbio_v7_0_pcie_index_data.data_offset = SOC15_REG_OFFSET(NBIO, 0, mmPCIE_DATA2);
-
 	return 0;
 }
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.h b/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.h
index 054ff49..21bad00 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.h
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.h
@@ -27,7 +27,7 @@
 #include "soc15_common.h"
 
 extern struct nbio_hdp_flush_reg nbio_v7_0_hdp_flush_reg;
-extern struct nbio_pcie_index_data nbio_v7_0_pcie_index_data;
+extern const struct nbio_pcie_index_data nbio_v7_0_pcie_index_data;
 int nbio_v7_0_init(struct amdgpu_device *adev);
 u32 nbio_v7_0_get_atombios_scratch_regs(struct amdgpu_device *adev,
                                         uint32_t idx);
diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
index c2611ec..28294f5 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -101,7 +101,7 @@ static u32 soc15_pcie_rreg(struct amdgpu_device *adev, u32 reg)
 {
 	unsigned long flags, address, data;
 	u32 r;
-	struct nbio_pcie_index_data *nbio_pcie_id;
+	const struct nbio_pcie_index_data *nbio_pcie_id;
 
 	if (adev->flags & AMD_IS_APU)
 		nbio_pcie_id = &nbio_v7_0_pcie_index_data;
@@ -122,7 +122,7 @@ static u32 soc15_pcie_rreg(struct amdgpu_device *adev, u32 reg)
 static void soc15_pcie_wreg(struct amdgpu_device *adev, u32 reg, u32 v)
 {
 	unsigned long flags, address, data;
-	struct nbio_pcie_index_data *nbio_pcie_id;
+	const struct nbio_pcie_index_data *nbio_pcie_id;
 
 	if (adev->flags & AMD_IS_APU)
 		nbio_pcie_id = &nbio_v7_0_pcie_index_data;
-- 
2.9.4