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 "amdgpu.h"
26 #include "cikd.h"
27 #include "kv_dpm.h"
28 
29 #include "smu/smu_7_0_0_d.h"
30 #include "smu/smu_7_0_0_sh_mask.h"
31 
32 int amdgpu_kv_notify_message_to_smu(struct amdgpu_device *adev, u32 id)
33 {
34 	u32 i;
35 	u32 tmp = 0;
36 
37 	WREG32(mmSMC_MESSAGE_0, id & SMC_MESSAGE_0__SMC_MSG_MASK);
38 
39 	for (i = 0; i < adev->usec_timeout; i++) {
40 		if ((RREG32(mmSMC_RESP_0) & SMC_RESP_0__SMC_RESP_MASK) != 0)
41 			break;
42 		udelay(1);
43 	}
44 	tmp = RREG32(mmSMC_RESP_0) & SMC_RESP_0__SMC_RESP_MASK;
45 
46 	if (tmp != 1) {
47 		if (tmp == 0xFF)
48 			return -EINVAL;
49 		else if (tmp == 0xFE)
50 			return -EINVAL;
51 	}
52 
53 	return 0;
54 }
55 
56 int amdgpu_kv_dpm_get_enable_mask(struct amdgpu_device *adev, u32 *enable_mask)
57 {
58 	int ret;
59 
60 	ret = amdgpu_kv_notify_message_to_smu(adev, PPSMC_MSG_SCLKDPM_GetEnabledMask);
61 
62 	if (ret == 0)
63 		*enable_mask = RREG32_SMC(ixSMC_SYSCON_MSG_ARG_0);
64 
65 	return ret;
66 }
67 
68 int amdgpu_kv_send_msg_to_smc_with_parameter(struct amdgpu_device *adev,
69 				      PPSMC_Msg msg, u32 parameter)
70 {
71 
72 	WREG32(mmSMC_MSG_ARG_0, parameter);
73 
74 	return amdgpu_kv_notify_message_to_smu(adev, msg);
75 }
76 
77 static int kv_set_smc_sram_address(struct amdgpu_device *adev,
78 				   u32 smc_address, u32 limit)
79 {
80 	if (smc_address & 3)
81 		return -EINVAL;
82 	if ((smc_address + 3) > limit)
83 		return -EINVAL;
84 
85 	WREG32(mmSMC_IND_INDEX_0, smc_address);
86 	WREG32_P(mmSMC_IND_ACCESS_CNTL, 0,
87 			~SMC_IND_ACCESS_CNTL__AUTO_INCREMENT_IND_0_MASK);
88 
89 	return 0;
90 }
91 
92 int amdgpu_kv_read_smc_sram_dword(struct amdgpu_device *adev, u32 smc_address,
93 			   u32 *value, u32 limit)
94 {
95 	int ret;
96 
97 	ret = kv_set_smc_sram_address(adev, smc_address, limit);
98 	if (ret)
99 		return ret;
100 
101 	*value = RREG32(mmSMC_IND_DATA_0);
102 	return 0;
103 }
104 
105 int amdgpu_kv_smc_dpm_enable(struct amdgpu_device *adev, bool enable)
106 {
107 	if (enable)
108 		return amdgpu_kv_notify_message_to_smu(adev, PPSMC_MSG_DPM_Enable);
109 	else
110 		return amdgpu_kv_notify_message_to_smu(adev, PPSMC_MSG_DPM_Disable);
111 }
112 
113 int amdgpu_kv_smc_bapm_enable(struct amdgpu_device *adev, bool enable)
114 {
115 	if (enable)
116 		return amdgpu_kv_notify_message_to_smu(adev, PPSMC_MSG_EnableBAPM);
117 	else
118 		return amdgpu_kv_notify_message_to_smu(adev, PPSMC_MSG_DisableBAPM);
119 }
120 
121 int amdgpu_kv_copy_bytes_to_smc(struct amdgpu_device *adev,
122 			 u32 smc_start_address,
123 			 const u8 *src, u32 byte_count, u32 limit)
124 {
125 	int ret;
126 	u32 data, original_data, addr, extra_shift, t_byte, count, mask;
127 
128 	if ((smc_start_address + byte_count) > limit)
129 		return -EINVAL;
130 
131 	addr = smc_start_address;
132 	t_byte = addr & 3;
133 
134 	/* RMW for the initial bytes */
135 	if  (t_byte != 0) {
136 		addr -= t_byte;
137 
138 		ret = kv_set_smc_sram_address(adev, addr, limit);
139 		if (ret)
140 			return ret;
141 
142 		original_data = RREG32(mmSMC_IND_DATA_0);
143 
144 		data = 0;
145 		mask = 0;
146 		count = 4;
147 		while (count > 0) {
148 			if (t_byte > 0) {
149 				mask = (mask << 8) | 0xff;
150 				t_byte--;
151 			} else if (byte_count > 0) {
152 				data = (data << 8) + *src++;
153 				byte_count--;
154 				mask <<= 8;
155 			} else {
156 				data <<= 8;
157 				mask = (mask << 8) | 0xff;
158 			}
159 			count--;
160 		}
161 
162 		data |= original_data & mask;
163 
164 		ret = kv_set_smc_sram_address(adev, addr, limit);
165 		if (ret)
166 			return ret;
167 
168 		WREG32(mmSMC_IND_DATA_0, data);
169 
170 		addr += 4;
171 	}
172 
173 	while (byte_count >= 4) {
174 		/* SMC address space is BE */
175 		data = (src[0] << 24) + (src[1] << 16) + (src[2] << 8) + src[3];
176 
177 		ret = kv_set_smc_sram_address(adev, addr, limit);
178 		if (ret)
179 			return ret;
180 
181 		WREG32(mmSMC_IND_DATA_0, data);
182 
183 		src += 4;
184 		byte_count -= 4;
185 		addr += 4;
186 	}
187 
188 	/* RMW for the final bytes */
189 	if (byte_count > 0) {
190 		data = 0;
191 
192 		ret = kv_set_smc_sram_address(adev, addr, limit);
193 		if (ret)
194 			return ret;
195 
196 		original_data = RREG32(mmSMC_IND_DATA_0);
197 
198 		extra_shift = 8 * (4 - byte_count);
199 
200 		while (byte_count > 0) {
201 			/* SMC address space is BE */
202 			data = (data << 8) + *src++;
203 			byte_count--;
204 		}
205 
206 		data <<= extra_shift;
207 
208 		data |= (original_data & ~((~0UL) << extra_shift));
209 
210 		ret = kv_set_smc_sram_address(adev, addr, limit);
211 		if (ret)
212 			return ret;
213 
214 		WREG32(mmSMC_IND_DATA_0, data);
215 	}
216 	return 0;
217 }
218 
219