drm/radeon/kms: add dpm support for sumo asics (v2)

This adds dpm support for sumo asics.  This includes:
- clockgating
- powergating
- dynamic engine clock scaling
- dynamic voltage scaling

set radeon.dpm=1 to enable it.

v2: fix indention

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>

1 files changed, 224 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/sumo_smc.c b/drivers/gpu/drm/radeon/sumo_smc.c
new file mode 100644
index 000000000000..7abbca6426d6
--- /dev/null
+++ b/drivers/gpu/drm/radeon/sumo_smc.c
@@ -0,0 +1,224 @@
+/*
+ * Copyright 2012 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.
+ *
+ */
+
+#include <linux/firmware.h>
+#include "drmP.h"
+#include "radeon.h"
+#include "sumod.h"
+#include "sumo_dpm.h"
+#include "ppsmc.h"
+#include "radeon_ucode.h"
+
+#define SUMO_SMU_SERVICE_ROUTINE_PG_INIT        1
+#define SUMO_SMU_SERVICE_ROUTINE_ALTVDDNB_NOTIFY  27
+#define SUMO_SMU_SERVICE_ROUTINE_GFX_SRV_ID_20  20
+
+struct sumo_ps *sumo_get_ps(struct radeon_ps *rps);
+struct sumo_power_info *sumo_get_pi(struct radeon_device *rdev);
+
+static void sumo_send_msg_to_smu(struct radeon_device *rdev, u32 id)
+{
+	u32 gfx_int_req;
+	int i;
+
+	for (i = 0; i < rdev->usec_timeout; i++) {
+		if (RREG32(GFX_INT_STATUS) & INT_DONE)
+			break;
+		udelay(1);
+	}
+
+	gfx_int_req = SERV_INDEX(id) | INT_REQ;
+	WREG32(GFX_INT_REQ, gfx_int_req);
+
+	for (i = 0; i < rdev->usec_timeout; i++) {
+		if (RREG32(GFX_INT_REQ) & INT_REQ)
+			break;
+		udelay(1);
+	}
+
+	for (i = 0; i < rdev->usec_timeout; i++) {
+		if (RREG32(GFX_INT_STATUS) & INT_ACK)
+			break;
+		udelay(1);
+	}
+
+	for (i = 0; i < rdev->usec_timeout; i++) {
+		if (RREG32(GFX_INT_STATUS) & INT_DONE)
+			break;
+		udelay(1);
+	}
+
+	gfx_int_req &= ~INT_REQ;
+	WREG32(GFX_INT_REQ, gfx_int_req);
+}
+
+void sumo_initialize_m3_arb(struct radeon_device *rdev)
+{
+	struct sumo_power_info *pi = sumo_get_pi(rdev);
+	u32 i;
+
+	if (!pi->enable_dynamic_m3_arbiter)
+		return;
+
+	for (i = 0; i < NUMBER_OF_M3ARB_PARAM_SETS; i++)
+		WREG32_RCU(MCU_M3ARB_PARAMS + (i * 4),
+			   pi->sys_info.csr_m3_arb_cntl_default[i]);
+
+	for (; i < NUMBER_OF_M3ARB_PARAM_SETS * 2; i++)
+		WREG32_RCU(MCU_M3ARB_PARAMS + (i * 4),
+			   pi->sys_info.csr_m3_arb_cntl_uvd[i % NUMBER_OF_M3ARB_PARAM_SETS]);
+
+	for (; i < NUMBER_OF_M3ARB_PARAM_SETS * 3; i++)
+		WREG32_RCU(MCU_M3ARB_PARAMS + (i * 4),
+			   pi->sys_info.csr_m3_arb_cntl_fs3d[i % NUMBER_OF_M3ARB_PARAM_SETS]);
+}
+
+static bool sumo_is_alt_vddnb_supported(struct radeon_device *rdev)
+{
+	struct sumo_power_info *pi = sumo_get_pi(rdev);
+	bool return_code = false;
+
+	if (!pi->enable_alt_vddnb)
+		return return_code;
+
+	if ((rdev->family == CHIP_SUMO) || (rdev->family == CHIP_SUMO2)) {
+		if (pi->fw_version >= 0x00010C00)
+			return_code = true;
+	}
+
+	return return_code;
+}
+
+void sumo_smu_notify_alt_vddnb_change(struct radeon_device *rdev,
+				      bool powersaving, bool force_nbps1)
+{
+	u32 param = 0;
+
+	if (!sumo_is_alt_vddnb_supported(rdev))
+		return;
+
+	if (powersaving)
+		param |= 1;
+
+	if (force_nbps1)
+		param |= 2;
+
+	WREG32_RCU(RCU_ALTVDDNB_NOTIFY, param);
+
+	sumo_send_msg_to_smu(rdev, SUMO_SMU_SERVICE_ROUTINE_ALTVDDNB_NOTIFY);
+}
+
+void sumo_smu_pg_init(struct radeon_device *rdev)
+{
+	sumo_send_msg_to_smu(rdev, SUMO_SMU_SERVICE_ROUTINE_PG_INIT);
+}
+
+static u32 sumo_power_of_4(u32 unit)
+{
+	u32 ret = 1;
+	u32 i;
+
+	for (i = 0; i < unit; i++)
+		ret *= 4;
+
+	return ret;
+}
+
+void sumo_enable_boost_timer(struct radeon_device *rdev)
+{
+	struct sumo_power_info *pi = sumo_get_pi(rdev);
+	u32 period, unit, timer_value;
+	u32 xclk = sumo_get_xclk(rdev);
+
+	unit = (RREG32_RCU(RCU_LCLK_SCALING_CNTL) & LCLK_SCALING_TIMER_PRESCALER_MASK)
+		>> LCLK_SCALING_TIMER_PRESCALER_SHIFT;
+
+	period = 100 * (xclk / 100 / sumo_power_of_4(unit));
+
+	timer_value = (period << 16) | (unit << 4);
+
+	WREG32_RCU(RCU_GNB_PWR_REP_TIMER_CNTL, timer_value);
+	WREG32_RCU(RCU_BOOST_MARGIN, pi->sys_info.sclk_dpm_boost_margin);
+	WREG32_RCU(RCU_THROTTLE_MARGIN, pi->sys_info.sclk_dpm_throttle_margin);
+	WREG32_RCU(GNB_TDP_LIMIT, pi->sys_info.gnb_tdp_limit);
+	WREG32_RCU(RCU_SclkDpmTdpLimitPG, pi->sys_info.sclk_dpm_tdp_limit_pg);
+
+	sumo_send_msg_to_smu(rdev, SUMO_SMU_SERVICE_ROUTINE_GFX_SRV_ID_20);
+}
+
+void sumo_set_tdp_limit(struct radeon_device *rdev, u32 index, u32 tdp_limit)
+{
+	u32 regoffset = 0;
+	u32 shift = 0;
+	u32 mask = 0xFFF;
+	u32 sclk_dpm_tdp_limit;
+
+	switch (index) {
+	case 0:
+		regoffset = RCU_SclkDpmTdpLimit01;
+		shift = 16;
+		break;
+	case 1:
+		regoffset = RCU_SclkDpmTdpLimit01;
+		shift = 0;
+		break;
+	case 2:
+		regoffset = RCU_SclkDpmTdpLimit23;
+		shift = 16;
+		break;
+	case 3:
+		regoffset = RCU_SclkDpmTdpLimit23;
+		shift = 0;
+		break;
+	case 4:
+		regoffset = RCU_SclkDpmTdpLimit47;
+		shift = 16;
+		break;
+	case 7:
+		regoffset = RCU_SclkDpmTdpLimit47;
+		shift = 0;
+		break;
+	default:
+		break;
+	}
+
+	sclk_dpm_tdp_limit = RREG32_RCU(regoffset);
+	sclk_dpm_tdp_limit &= ~(mask << shift);
+	sclk_dpm_tdp_limit |= (tdp_limit << shift);
+	WREG32_RCU(regoffset, sclk_dpm_tdp_limit);
+}
+
+void sumo_boost_state_enable(struct radeon_device *rdev, bool enable)
+{
+	u32 boost_disable = RREG32_RCU(RCU_GPU_BOOST_DISABLE);
+
+	boost_disable &= 0xFFFFFFFE;
+	boost_disable |= (enable ? 0 : 1);
+	WREG32_RCU(RCU_GPU_BOOST_DISABLE, boost_disable);
+}
+
+u32 sumo_get_running_fw_version(struct radeon_device *rdev)
+{
+	return RREG32_RCU(RCU_FW_VERSION);
+}
+