drm/amdgpu: drop legacy IO bar support

It was leftover from radeon where it was required for some
specific old hardware.  It hasn't been required for ages
and the driver already falls back to MMIO when legacy IO
is not available.  Legacy IO also seems to be problematic on
on some thunderbolt devices.  Drop it.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au>

1 files changed, 0 insertions, 57 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index f04680d50856..9b022bac6708 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -466,49 +466,6 @@ void amdgpu_mm_wreg_mmio_rlc(struct amdgpu_device *adev,
 }
 
 /**
- * amdgpu_io_rreg - read an IO register
- *
- * @adev: amdgpu_device pointer
- * @reg: dword aligned register offset
- *
- * Returns the 32 bit value from the offset specified.
- */
-u32 amdgpu_io_rreg(struct amdgpu_device *adev, u32 reg)
-{
-	if (adev->in_pci_err_recovery)
-		return 0;
-
-	if ((reg * 4) < adev->rio_mem_size)
-		return ioread32(adev->rio_mem + (reg * 4));
-	else {
-		iowrite32((reg * 4), adev->rio_mem + (mmMM_INDEX * 4));
-		return ioread32(adev->rio_mem + (mmMM_DATA * 4));
-	}
-}
-
-/**
- * amdgpu_io_wreg - write to an IO register
- *
- * @adev: amdgpu_device pointer
- * @reg: dword aligned register offset
- * @v: 32 bit value to write to the register
- *
- * Writes the value specified to the offset specified.
- */
-void amdgpu_io_wreg(struct amdgpu_device *adev, u32 reg, u32 v)
-{
-	if (adev->in_pci_err_recovery)
-		return;
-
-	if ((reg * 4) < adev->rio_mem_size)
-		iowrite32(v, adev->rio_mem + (reg * 4));
-	else {
-		iowrite32((reg * 4), adev->rio_mem + (mmMM_INDEX * 4));
-		iowrite32(v, adev->rio_mem + (mmMM_DATA * 4));
-	}
-}
-
-/**
  * amdgpu_mm_rdoorbell - read a doorbell dword
  *
  * @adev: amdgpu_device pointer
@@ -3356,17 +3313,6 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 	DRM_INFO("register mmio base: 0x%08X\n", (uint32_t)adev->rmmio_base);
 	DRM_INFO("register mmio size: %u\n", (unsigned)adev->rmmio_size);
 
-	/* io port mapping */
-	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
-		if (pci_resource_flags(adev->pdev, i) & IORESOURCE_IO) {
-			adev->rio_mem_size = pci_resource_len(adev->pdev, i);
-			adev->rio_mem = pci_iomap(adev->pdev, i, adev->rio_mem_size);
-			break;
-		}
-	}
-	if (adev->rio_mem == NULL)
-		DRM_INFO("PCI I/O BAR is not found.\n");
-
 	/* enable PCIE atomic ops */
 	r = pci_enable_atomic_ops_to_root(adev->pdev,
 					  PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
@@ -3698,9 +3644,6 @@ void amdgpu_device_fini(struct amdgpu_device *adev)
 		vga_switcheroo_fini_domain_pm_ops(adev->dev);
 	if ((adev->pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
 		vga_client_register(adev->pdev, NULL, NULL, NULL);
-	if (adev->rio_mem)
-		pci_iounmap(adev->pdev, adev->rio_mem);
-	adev->rio_mem = NULL;
 	iounmap(adev->rmmio);
 	adev->rmmio = NULL;
 	amdgpu_device_doorbell_fini(adev);