drm/radeon/kms: add dpm support for rv7xx (v4)

This adds dpm support for rv7xx asics.  This includes:
- clockgating
- dynamic engine clock scaling
- dynamic memory clock scaling
- dynamic voltage scaling
- dynamic pcie gen1/gen2 switching

Set radeon.dpm=1 to enable.

v2: reduce stack usage
v3: fix 64 bit div
v4: fix state enable

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 42 insertions, 6 deletions

diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index ce5aa1febb80..a27d746386ae 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -57,10 +57,14 @@ MODULE_FIRMWARE("radeon/RS780_pfp.bin");
 MODULE_FIRMWARE("radeon/RS780_me.bin");
 MODULE_FIRMWARE("radeon/RV770_pfp.bin");
 MODULE_FIRMWARE("radeon/RV770_me.bin");
+MODULE_FIRMWARE("radeon/RV770_smc.bin");
 MODULE_FIRMWARE("radeon/RV730_pfp.bin");
 MODULE_FIRMWARE("radeon/RV730_me.bin");
+MODULE_FIRMWARE("radeon/RV730_smc.bin");
+MODULE_FIRMWARE("radeon/RV740_smc.bin");
 MODULE_FIRMWARE("radeon/RV710_pfp.bin");
 MODULE_FIRMWARE("radeon/RV710_me.bin");
+MODULE_FIRMWARE("radeon/RV710_smc.bin");
 MODULE_FIRMWARE("radeon/R600_rlc.bin");
 MODULE_FIRMWARE("radeon/R700_rlc.bin");
 MODULE_FIRMWARE("radeon/CEDAR_pfp.bin");
@@ -2139,7 +2143,8 @@ int r600_init_microcode(struct radeon_device *rdev)
 	struct platform_device *pdev;
 	const char *chip_name;
 	const char *rlc_chip_name;
-	size_t pfp_req_size, me_req_size, rlc_req_size;
+	const char *smc_chip_name = "RV770";
+	size_t pfp_req_size, me_req_size, rlc_req_size, smc_req_size = 0;
 	char fw_name[30];
 	int err;
 
@@ -2185,15 +2190,26 @@ int r600_init_microcode(struct radeon_device *rdev)
 	case CHIP_RV770:
 		chip_name = "RV770";
 		rlc_chip_name = "R700";
+		smc_chip_name = "RV770";
+		smc_req_size = ALIGN(RV770_SMC_UCODE_SIZE, 4);
 		break;
 	case CHIP_RV730:
-	case CHIP_RV740:
 		chip_name = "RV730";
 		rlc_chip_name = "R700";
+		smc_chip_name = "RV730";
+		smc_req_size = ALIGN(RV730_SMC_UCODE_SIZE, 4);
 		break;
 	case CHIP_RV710:
 		chip_name = "RV710";
 		rlc_chip_name = "R700";
+		smc_chip_name = "RV710";
+		smc_req_size = ALIGN(RV710_SMC_UCODE_SIZE, 4);
+		break;
+	case CHIP_RV740:
+		chip_name = "RV730";
+		rlc_chip_name = "R700";
+		smc_chip_name = "RV740";
+		smc_req_size = ALIGN(RV740_SMC_UCODE_SIZE, 4);
 		break;
 	case CHIP_CEDAR:
 		chip_name = "CEDAR";
@@ -2277,6 +2293,19 @@ int r600_init_microcode(struct radeon_device *rdev)
 		err = -EINVAL;
 	}
 
+	if ((rdev->family >= CHIP_RV770) && (rdev->family <= CHIP_RV740)) {
+		snprintf(fw_name, sizeof(fw_name), "radeon/%s_smc.bin", smc_chip_name);
+		err = request_firmware(&rdev->smc_fw, fw_name, &pdev->dev);
+		if (err)
+			goto out;
+		if (rdev->smc_fw->size != smc_req_size) {
+			printk(KERN_ERR
+			       "smc: Bogus length %zu in firmware \"%s\"\n",
+			       rdev->smc_fw->size, fw_name);
+			err = -EINVAL;
+		}
+	}
+
 out:
 	platform_device_unregister(pdev);
 
@@ -2291,6 +2320,8 @@ out:
 		rdev->me_fw = NULL;
 		release_firmware(rdev->rlc_fw);
 		rdev->rlc_fw = NULL;
+		release_firmware(rdev->smc_fw);
+		rdev->smc_fw = NULL;
 	}
 	return err;
 }
@@ -4039,10 +4070,13 @@ int r600_irq_set(struct radeon_device *rdev)
 	if ((rdev->family > CHIP_R600) && (rdev->family < CHIP_RV770)) {
 		thermal_int = RREG32(CG_THERMAL_INT) &
 			~(THERM_INT_MASK_HIGH | THERM_INT_MASK_LOW);
-		if (rdev->irq.dpm_thermal) {
-			DRM_DEBUG("dpm thermal\n");
-			thermal_int |= THERM_INT_MASK_HIGH | THERM_INT_MASK_LOW;
-		}
+	} else if (rdev->family >= CHIP_RV770) {
+		thermal_int = RREG32(RV770_CG_THERMAL_INT) &
+			~(THERM_INT_MASK_HIGH | THERM_INT_MASK_LOW);
+	}
+	if (rdev->irq.dpm_thermal) {
+		DRM_DEBUG("dpm thermal\n");
+		thermal_int |= THERM_INT_MASK_HIGH | THERM_INT_MASK_LOW;
 	}
 
 	if (atomic_read(&rdev->irq.ring_int[RADEON_RING_TYPE_GFX_INDEX])) {
@@ -4128,6 +4162,8 @@ int r600_irq_set(struct radeon_device *rdev)
 	}
 	if ((rdev->family > CHIP_R600) && (rdev->family < CHIP_RV770)) {
 		WREG32(CG_THERMAL_INT, thermal_int);
+	} else if (rdev->family >= CHIP_RV770) {
+		WREG32(RV770_CG_THERMAL_INT, thermal_int);
 	}
 
 	return 0;