drm/radeon/kms: add dpm support for btc (v3)

This adds dpm support for btc asics.  This includes:
- clockgating
- dynamic engine clock scaling
- dynamic memory clock scaling
- dynamic voltage scaling
- dynamic pcie gen1/gen2 switching (requires additional acpi support)

Set radeon.dpm=1 to enable.

v2: reduce stack usage
v3: attempt to fix state enable

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

1 files changed, 181 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/btcd.h b/drivers/gpu/drm/radeon/btcd.h
new file mode 100644
index 000000000000..29e32de7e025
--- /dev/null
+++ b/drivers/gpu/drm/radeon/btcd.h
@@ -0,0 +1,181 @@
+/*
+ * Copyright 2010 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Alex Deucher
+ */
+#ifndef _BTCD_H_
+#define _BTCD_H_
+
+/* pm registers */
+
+#define GENERAL_PWRMGT                                  0x63c
+#       define GLOBAL_PWRMGT_EN                         (1 << 0)
+#       define STATIC_PM_EN                             (1 << 1)
+#       define THERMAL_PROTECTION_DIS                   (1 << 2)
+#       define THERMAL_PROTECTION_TYPE                  (1 << 3)
+#       define ENABLE_GEN2PCIE                          (1 << 4)
+#       define ENABLE_GEN2XSP                           (1 << 5)
+#       define SW_SMIO_INDEX(x)                         ((x) << 6)
+#       define SW_SMIO_INDEX_MASK                       (3 << 6)
+#       define SW_SMIO_INDEX_SHIFT                      6
+#       define LOW_VOLT_D2_ACPI                         (1 << 8)
+#       define LOW_VOLT_D3_ACPI                         (1 << 9)
+#       define VOLT_PWRMGT_EN                           (1 << 10)
+#       define BACKBIAS_PAD_EN                          (1 << 18)
+#       define BACKBIAS_VALUE                           (1 << 19)
+#       define DYN_SPREAD_SPECTRUM_EN                   (1 << 23)
+#       define AC_DC_SW                                 (1 << 24)
+
+#define	CG_BIF_REQ_AND_RSP				0x7f4
+#define		CG_CLIENT_REQ(x)			((x) << 0)
+#define		CG_CLIENT_REQ_MASK			(0xff << 0)
+#define		CG_CLIENT_REQ_SHIFT			0
+#define		CG_CLIENT_RESP(x)			((x) << 8)
+#define		CG_CLIENT_RESP_MASK			(0xff << 8)
+#define		CG_CLIENT_RESP_SHIFT			8
+#define		CLIENT_CG_REQ(x)			((x) << 16)
+#define		CLIENT_CG_REQ_MASK			(0xff << 16)
+#define		CLIENT_CG_REQ_SHIFT			16
+#define		CLIENT_CG_RESP(x)			((x) << 24)
+#define		CLIENT_CG_RESP_MASK			(0xff << 24)
+#define		CLIENT_CG_RESP_SHIFT			24
+
+#define	SCLK_PSKIP_CNTL					0x8c0
+#define		PSKIP_ON_ALLOW_STOP_HI(x)		((x) << 16)
+#define		PSKIP_ON_ALLOW_STOP_HI_MASK		(0xff << 16)
+#define		PSKIP_ON_ALLOW_STOP_HI_SHIFT		16
+
+#define	CG_ULV_CONTROL					0x8c8
+#define	CG_ULV_PARAMETER				0x8cc
+
+#define	MC_ARB_DRAM_TIMING				0x2774
+#define	MC_ARB_DRAM_TIMING2				0x2778
+
+#define	MC_ARB_RFSH_RATE				0x27b0
+#define		POWERMODE0(x)				((x) << 0)
+#define		POWERMODE0_MASK				(0xff << 0)
+#define		POWERMODE0_SHIFT			0
+#define		POWERMODE1(x)				((x) << 8)
+#define		POWERMODE1_MASK				(0xff << 8)
+#define		POWERMODE1_SHIFT			8
+#define		POWERMODE2(x)				((x) << 16)
+#define		POWERMODE2_MASK				(0xff << 16)
+#define		POWERMODE2_SHIFT			16
+#define		POWERMODE3(x)				((x) << 24)
+#define		POWERMODE3_MASK				(0xff << 24)
+#define		POWERMODE3_SHIFT			24
+
+#define MC_ARB_BURST_TIME                               0x2808
+#define		STATE0(x)				((x) << 0)
+#define		STATE0_MASK				(0x1f << 0)
+#define		STATE0_SHIFT				0
+#define		STATE1(x)				((x) << 5)
+#define		STATE1_MASK				(0x1f << 5)
+#define		STATE1_SHIFT				5
+#define		STATE2(x)				((x) << 10)
+#define		STATE2_MASK				(0x1f << 10)
+#define		STATE2_SHIFT				10
+#define		STATE3(x)				((x) << 15)
+#define		STATE3_MASK				(0x1f << 15)
+#define		STATE3_SHIFT				15
+
+#define MC_SEQ_RAS_TIMING                               0x28a0
+#define MC_SEQ_CAS_TIMING                               0x28a4
+#define MC_SEQ_MISC_TIMING                              0x28a8
+#define MC_SEQ_MISC_TIMING2                             0x28ac
+
+#define MC_SEQ_RD_CTL_D0                                0x28b4
+#define MC_SEQ_RD_CTL_D1                                0x28b8
+#define MC_SEQ_WR_CTL_D0                                0x28bc
+#define MC_SEQ_WR_CTL_D1                                0x28c0
+
+#define MC_PMG_AUTO_CFG                                 0x28d4
+
+#define MC_SEQ_STATUS_M                                 0x29f4
+#       define PMG_PWRSTATE                             (1 << 16)
+
+#define MC_SEQ_MISC0                                    0x2a00
+#define         MC_SEQ_MISC0_GDDR5_SHIFT                28
+#define         MC_SEQ_MISC0_GDDR5_MASK                 0xf0000000
+#define         MC_SEQ_MISC0_GDDR5_VALUE                5
+#define MC_SEQ_MISC1                                    0x2a04
+#define MC_SEQ_RESERVE_M                                0x2a08
+#define MC_PMG_CMD_EMRS                                 0x2a0c
+
+#define MC_SEQ_MISC3                                    0x2a2c
+
+#define MC_SEQ_MISC5                                    0x2a54
+#define MC_SEQ_MISC6                                    0x2a58
+
+#define MC_SEQ_MISC7                                    0x2a64
+
+#define MC_SEQ_CG                                       0x2a68
+#define		CG_SEQ_REQ(x)				((x) << 0)
+#define		CG_SEQ_REQ_MASK				(0xff << 0)
+#define		CG_SEQ_REQ_SHIFT			0
+#define		CG_SEQ_RESP(x)				((x) << 8)
+#define		CG_SEQ_RESP_MASK			(0xff << 8)
+#define		CG_SEQ_RESP_SHIFT			8
+#define		SEQ_CG_REQ(x)				((x) << 16)
+#define		SEQ_CG_REQ_MASK				(0xff << 16)
+#define		SEQ_CG_REQ_SHIFT			16
+#define		SEQ_CG_RESP(x)				((x) << 24)
+#define		SEQ_CG_RESP_MASK			(0xff << 24)
+#define		SEQ_CG_RESP_SHIFT			24
+#define MC_SEQ_RAS_TIMING_LP                            0x2a6c
+#define MC_SEQ_CAS_TIMING_LP                            0x2a70
+#define MC_SEQ_MISC_TIMING_LP                           0x2a74
+#define MC_SEQ_MISC_TIMING2_LP                          0x2a78
+#define MC_SEQ_WR_CTL_D0_LP                             0x2a7c
+#define MC_SEQ_WR_CTL_D1_LP                             0x2a80
+#define MC_SEQ_PMG_CMD_EMRS_LP                          0x2a84
+#define MC_SEQ_PMG_CMD_MRS_LP                           0x2a88
+
+#define MC_PMG_CMD_MRS                                  0x2aac
+
+#define MC_SEQ_RD_CTL_D0_LP                             0x2b1c
+#define MC_SEQ_RD_CTL_D1_LP                             0x2b20
+
+#define MC_PMG_CMD_MRS1                                 0x2b44
+#define MC_SEQ_PMG_CMD_MRS1_LP                          0x2b48
+
+#define	LB_SYNC_RESET_SEL				0x6b28
+#define		LB_SYNC_RESET_SEL_MASK			(3 << 0)
+#define		LB_SYNC_RESET_SEL_SHIFT			0
+
+/* PCIE link stuff */
+#define PCIE_LC_SPEED_CNTL                                0xa4 /* PCIE_P */
+#       define LC_GEN2_EN_STRAP                           (1 << 0)
+#       define LC_TARGET_LINK_SPEED_OVERRIDE_EN           (1 << 1)
+#       define LC_FORCE_EN_HW_SPEED_CHANGE                (1 << 5)
+#       define LC_FORCE_DIS_HW_SPEED_CHANGE               (1 << 6)
+#       define LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_MASK      (0x3 << 8)
+#       define LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_SHIFT     3
+#       define LC_CURRENT_DATA_RATE                       (1 << 11)
+#       define LC_HW_VOLTAGE_IF_CONTROL(x)                ((x) << 12)
+#       define LC_HW_VOLTAGE_IF_CONTROL_MASK              (3 << 12)
+#       define LC_HW_VOLTAGE_IF_CONTROL_SHIFT             12
+#       define LC_VOLTAGE_TIMER_SEL_MASK                  (0xf << 14)
+#       define LC_CLR_FAILED_SPD_CHANGE_CNT               (1 << 21)
+#       define LC_OTHER_SIDE_EVER_SENT_GEN2               (1 << 23)
+#       define LC_OTHER_SIDE_SUPPORTS_GEN2                (1 << 24)
+
+#endif