linux-kernel - [PATCH v8 5/6] drm/amdgpu: move hw generation check into amdgpu_doorbell

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Message-Id: <1499698794-1718-6-git-send-email-deathsimple@vodafone.de>
Date:   Mon, 10 Jul 2017 16:59:53 +0200
From:   Christian König <deathsimple@...afone.de>
To:     helgaas@...nel.org, linux-pci@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        amd-gfx@...ts.freedesktop.org
Subject: [PATCH v8 5/6] drm/amdgpu: move hw generation check into amdgpu_doorbell_init v2

From: Christian König <christian.koenig@....com>

This way we can safely call it on SI as well.

v2: fix type in commit message

Signed-off-by: Christian König <christian.koenig@....com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 4a8fc15..7d1a04a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -419,6 +419,15 @@ void amdgpu_pci_config_reset(struct amdgpu_device *adev)
  */
 static int amdgpu_doorbell_init(struct amdgpu_device *adev)
 {
+	/* No doorbell on SI hardware generation */
+	if (adev->asic_type < CHIP_BONAIRE) {
+		adev->doorbell.base = 0;
+		adev->doorbell.size = 0;
+		adev->doorbell.num_doorbells = 0;
+		adev->doorbell.ptr = NULL;
+		return 0;
+	}
+
 	/* doorbell bar mapping */
 	adev->doorbell.base = pci_resource_start(adev->pdev, 2);
 	adev->doorbell.size = pci_resource_len(adev->pdev, 2);
@@ -2099,9 +2108,8 @@ 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);
 
-	if (adev->asic_type >= CHIP_BONAIRE)
-		/* doorbell bar mapping */
-		amdgpu_doorbell_init(adev);
+	/* doorbell bar mapping */
+	amdgpu_doorbell_init(adev);
 
 	/* io port mapping */
 	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
@@ -2307,8 +2315,7 @@ void amdgpu_device_fini(struct amdgpu_device *adev)
 	adev->rio_mem = NULL;
 	iounmap(adev->rmmio);
 	adev->rmmio = NULL;
-	if (adev->asic_type >= CHIP_BONAIRE)
-		amdgpu_doorbell_fini(adev);
+	amdgpu_doorbell_fini(adev);
 	amdgpu_debugfs_regs_cleanup(adev);
 }
 
-- 
2.7.4