[PATCH 5/6] drm/amdgpu: Add the HDP flush support for Navi

[Zhao, Yong]

The HDP flush support code was missing in the nbio and nv files.

Change-Id: I046ff52567676b56bf16dc1728b02481233acb61
Signed-off-by: Yong Zhao <yong.z...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c | 16 +++++++++++++---
 drivers/gpu/drm/amd/amdgpu/nv.c        |  9 +++++++++
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c 
b/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c
index e7e36fb6113d..c699cbfe015a 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c
@@ -27,11 +27,21 @@
 #include "nbio/nbio_2_3_default.h"
 #include "nbio/nbio_2_3_offset.h"
 #include "nbio/nbio_2_3_sh_mask.h"
+#include <uapi/linux/kfd_ioctl.h>
 
 #define smnPCIE_CONFIG_CNTL    0x11180044
 #define smnCPM_CONTROL         0x11180460
 #define smnPCIE_CNTL2          0x11180070
 
+
+static void nbio_v2_3_remap_hdp_registers(struct amdgpu_device *adev)
+{
+       WREG32_SOC15(NBIO, 0, mmREMAP_HDP_MEM_FLUSH_CNTL,
+               adev->rmmio_remap.reg_offset + 
KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL);
+       WREG32_SOC15(NBIO, 0, mmREMAP_HDP_REG_FLUSH_CNTL,
+               adev->rmmio_remap.reg_offset + 
KFD_MMIO_REMAP_HDP_REG_FLUSH_CNTL);
+}
+
 static u32 nbio_v2_3_get_rev_id(struct amdgpu_device *adev)
 {
        u32 tmp = RREG32_SOC15(NBIO, 0, mmRCC_DEV0_EPF0_STRAP0);
@@ -56,10 +66,9 @@ static void nbio_v2_3_hdp_flush(struct amdgpu_device *adev,
                                struct amdgpu_ring *ring)
 {
        if (!ring || !ring->funcs->emit_wreg)
-               WREG32_SOC15_NO_KIQ(NBIO, 0, 
mmBIF_BX_PF_HDP_MEM_COHERENCY_FLUSH_CNTL, 0);
+               WREG32_NO_KIQ((adev->rmmio_remap.reg_offset + 
KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL) >> 2, 0);
        else
-               amdgpu_ring_emit_wreg(ring, SOC15_REG_OFFSET(
-                       NBIO, 0, mmBIF_BX_PF_HDP_MEM_COHERENCY_FLUSH_CNTL), 0);
+               amdgpu_ring_emit_wreg(ring, (adev->rmmio_remap.reg_offset + 
KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL) >> 2, 0);
 }
 
 static u32 nbio_v2_3_get_memsize(struct amdgpu_device *adev)
@@ -330,4 +339,5 @@ const struct amdgpu_nbio_funcs nbio_v2_3_funcs = {
        .ih_control = nbio_v2_3_ih_control,
        .init_registers = nbio_v2_3_init_registers,
        .detect_hw_virt = nbio_v2_3_detect_hw_virt,
+       .remap_hdp_registers = nbio_v7_4_remap_hdp_registers,
 };
diff --git a/drivers/gpu/drm/amd/amdgpu/nv.c b/drivers/gpu/drm/amd/amdgpu/nv.c
index b3e7756fcc4b..6699a45b88ec 100644
--- a/drivers/gpu/drm/amd/amdgpu/nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/nv.c
@@ -587,8 +587,11 @@ static const struct amdgpu_asic_funcs nv_asic_funcs =
 
 static int nv_common_early_init(void *handle)
 {
+#define MMIO_REG_HOLE_OFFSET (0x80000 - PAGE_SIZE)
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
+       adev->rmmio_remap.reg_offset = MMIO_REG_HOLE_OFFSET;
+       adev->rmmio_remap.bus_addr = adev->rmmio_base + MMIO_REG_HOLE_OFFSET;
        adev->smc_rreg = NULL;
        adev->smc_wreg = NULL;
        adev->pcie_rreg = &nv_pcie_rreg;
@@ -714,6 +717,12 @@ static int nv_common_hw_init(void *handle)
        nv_program_aspm(adev);
        /* setup nbio registers */
        adev->nbio.funcs->init_registers(adev);
+       /* remap HDP registers to a hole in mmio space,
+        * for the purpose of expose those registers
+        * to process space
+        */
+       if (adev->nbio.funcs->remap_hdp_registers)
+               adev->nbio.funcs->remap_hdp_registers(adev);
        /* enable the doorbell aperture */
        nv_enable_doorbell_aperture(adev, true);
 
-- 
2.17.1

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