fsi: Add regmap and refactor sbefifo

Merge series from Eddie James <eajames@linux.ibm.com>:

The SBEFIFO hardware can now be attached over a new I2C endpoint interface
called the I2C Responder (I2CR). In order to use the existing SBEFIFO
driver, add a regmap driver for the FSI bus and an endpoint driver for the
I2CR. Then, refactor the SBEFIFO and OCC drivers to clean up and use the
new regmap driver or the I2CR interface.

This branch just has the regmap change so it can be shared with the FSI
code.

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
index 183024d7c184..e3b2b6b4f1a6 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -1211,6 +1211,20 @@ static int soc15_common_sw_fini(void *handle)
 	return 0;
 }
 
+static void soc15_sdma_doorbell_range_init(struct amdgpu_device *adev)
+{
+	int i;
+
+	/* sdma doorbell range is programed by hypervisor */
+	if (!amdgpu_sriov_vf(adev)) {
+		for (i = 0; i < adev->sdma.num_instances; i++) {
+			adev->nbio.funcs->sdma_doorbell_range(adev, i,
+				true, adev->doorbell_index.sdma_engine[i] << 1,
+				adev->doorbell_index.sdma_doorbell_range);
+		}
+	}
+}
+
 static int soc15_common_hw_init(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
@@ -1230,6 +1244,13 @@ static int soc15_common_hw_init(void *handle)
 
 	/* enable the doorbell aperture */
 	soc15_enable_doorbell_aperture(adev, true);
+	/* HW doorbell routing policy: doorbell writing not
+	 * in SDMA/IH/MM/ACV range will be routed to CP. So
+	 * we need to init SDMA doorbell range prior
+	 * to CP ip block init and ring test.  IH already
+	 * happens before CP.
+	 */
+	soc15_sdma_doorbell_range_init(adev);
 
 	return 0;
 }