xref: /linux/drivers/gpu/drm/radeon/kv_smc.c (revision b7e1e969c887c897947fdc3754fe9b0c24acb155)
1 /*
2  * Copyright 2013 Advanced Micro Devices, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: Alex Deucher
23  */
24 
25 #include "radeon.h"
26 #include "cikd.h"
27 #include "kv_dpm.h"
28 
kv_notify_message_to_smu(struct radeon_device * rdev,u32 id)29 int kv_notify_message_to_smu(struct radeon_device *rdev, u32 id)
30 {
31 	u32 i;
32 	u32 tmp = 0;
33 
34 	WREG32(SMC_MESSAGE_0, id & SMC_MSG_MASK);
35 
36 	for (i = 0; i < rdev->usec_timeout; i++) {
37 		if ((RREG32(SMC_RESP_0) & SMC_RESP_MASK) != 0)
38 			break;
39 		udelay(1);
40 	}
41 	tmp = RREG32(SMC_RESP_0) & SMC_RESP_MASK;
42 
43 	if (tmp != 1) {
44 		if (tmp == 0xFF)
45 			return -EINVAL;
46 		else if (tmp == 0xFE)
47 			return -EINVAL;
48 	}
49 
50 	return 0;
51 }
52 
kv_dpm_get_enable_mask(struct radeon_device * rdev,u32 * enable_mask)53 int kv_dpm_get_enable_mask(struct radeon_device *rdev, u32 *enable_mask)
54 {
55 	int ret;
56 
57 	ret = kv_notify_message_to_smu(rdev, PPSMC_MSG_SCLKDPM_GetEnabledMask);
58 
59 	if (ret == 0)
60 		*enable_mask = RREG32_SMC(SMC_SYSCON_MSG_ARG_0);
61 
62 	return ret;
63 }
64 
kv_send_msg_to_smc_with_parameter(struct radeon_device * rdev,PPSMC_Msg msg,u32 parameter)65 int kv_send_msg_to_smc_with_parameter(struct radeon_device *rdev,
66 				      PPSMC_Msg msg, u32 parameter)
67 {
68 
69 	WREG32(SMC_MSG_ARG_0, parameter);
70 
71 	return kv_notify_message_to_smu(rdev, msg);
72 }
73 
kv_set_smc_sram_address(struct radeon_device * rdev,u32 smc_address,u32 limit)74 static int kv_set_smc_sram_address(struct radeon_device *rdev,
75 				   u32 smc_address, u32 limit)
76 {
77 	if (smc_address & 3)
78 		return -EINVAL;
79 	if ((smc_address + 3) > limit)
80 		return -EINVAL;
81 
82 	WREG32(SMC_IND_INDEX_0, smc_address);
83 	WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0);
84 
85 	return 0;
86 }
87 
kv_read_smc_sram_dword(struct radeon_device * rdev,u32 smc_address,u32 * value,u32 limit)88 int kv_read_smc_sram_dword(struct radeon_device *rdev, u32 smc_address,
89 			   u32 *value, u32 limit)
90 {
91 	int ret;
92 
93 	ret = kv_set_smc_sram_address(rdev, smc_address, limit);
94 	if (ret)
95 		return ret;
96 
97 	*value = RREG32(SMC_IND_DATA_0);
98 	return 0;
99 }
100 
kv_smc_dpm_enable(struct radeon_device * rdev,bool enable)101 int kv_smc_dpm_enable(struct radeon_device *rdev, bool enable)
102 {
103 	if (enable)
104 		return kv_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Enable);
105 	else
106 		return kv_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Disable);
107 }
108 
kv_smc_bapm_enable(struct radeon_device * rdev,bool enable)109 int kv_smc_bapm_enable(struct radeon_device *rdev, bool enable)
110 {
111 	if (enable)
112 		return kv_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);
113 	else
114 		return kv_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);
115 }
116 
kv_copy_bytes_to_smc(struct radeon_device * rdev,u32 smc_start_address,const u8 * src,u32 byte_count,u32 limit)117 int kv_copy_bytes_to_smc(struct radeon_device *rdev,
118 			 u32 smc_start_address,
119 			 const u8 *src, u32 byte_count, u32 limit)
120 {
121 	int ret;
122 	u32 data, original_data, addr, extra_shift, t_byte, count, mask;
123 
124 	if ((smc_start_address + byte_count) > limit)
125 		return -EINVAL;
126 
127 	addr = smc_start_address;
128 	t_byte = addr & 3;
129 
130 	/* RMW for the initial bytes */
131 	if  (t_byte != 0) {
132 		addr -= t_byte;
133 
134 		ret = kv_set_smc_sram_address(rdev, addr, limit);
135 		if (ret)
136 			return ret;
137 
138 		original_data = RREG32(SMC_IND_DATA_0);
139 
140 		data = 0;
141 		mask = 0;
142 		count = 4;
143 		while (count > 0) {
144 			if (t_byte > 0) {
145 				mask = (mask << 8) | 0xff;
146 				t_byte--;
147 			} else if (byte_count > 0) {
148 				data = (data << 8) + *src++;
149 				byte_count--;
150 				mask <<= 8;
151 			} else {
152 				data <<= 8;
153 				mask = (mask << 8) | 0xff;
154 			}
155 			count--;
156 		}
157 
158 		data |= original_data & mask;
159 
160 		ret = kv_set_smc_sram_address(rdev, addr, limit);
161 		if (ret)
162 			return ret;
163 
164 		WREG32(SMC_IND_DATA_0, data);
165 
166 		addr += 4;
167 	}
168 
169 	while (byte_count >= 4) {
170 		/* SMC address space is BE */
171 		data = (src[0] << 24) + (src[1] << 16) + (src[2] << 8) + src[3];
172 
173 		ret = kv_set_smc_sram_address(rdev, addr, limit);
174 		if (ret)
175 			return ret;
176 
177 		WREG32(SMC_IND_DATA_0, data);
178 
179 		src += 4;
180 		byte_count -= 4;
181 		addr += 4;
182 	}
183 
184 	/* RMW for the final bytes */
185 	if (byte_count > 0) {
186 		data = 0;
187 
188 		ret = kv_set_smc_sram_address(rdev, addr, limit);
189 		if (ret)
190 			return ret;
191 
192 		original_data = RREG32(SMC_IND_DATA_0);
193 
194 		extra_shift = 8 * (4 - byte_count);
195 
196 		while (byte_count > 0) {
197 			/* SMC address space is BE */
198 			data = (data << 8) + *src++;
199 			byte_count--;
200 		}
201 
202 		data <<= extra_shift;
203 
204 		data |= (original_data & ~((~0UL) << extra_shift));
205 
206 		ret = kv_set_smc_sram_address(rdev, addr, limit);
207 		if (ret)
208 			return ret;
209 
210 		WREG32(SMC_IND_DATA_0, data);
211 	}
212 	return 0;
213 }
214 
215