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 "drmP.h" 26 #include "radeon.h" 27 #include "cikd.h" 28 #include "kv_dpm.h" 29 30 int kv_notify_message_to_smu(struct radeon_device *rdev, u32 id) 31 { 32 u32 i; 33 u32 tmp = 0; 34 35 WREG32(SMC_MESSAGE_0, id & SMC_MSG_MASK); 36 37 for (i = 0; i < rdev->usec_timeout; i++) { 38 if ((RREG32(SMC_RESP_0) & SMC_RESP_MASK) != 0) 39 break; 40 udelay(1); 41 } 42 tmp = RREG32(SMC_RESP_0) & SMC_RESP_MASK; 43 44 if (tmp != 1) { 45 if (tmp == 0xFF) 46 return -EINVAL; 47 else if (tmp == 0xFE) 48 return -EINVAL; 49 } 50 51 return 0; 52 } 53 54 int kv_dpm_get_enable_mask(struct radeon_device *rdev, u32 *enable_mask) 55 { 56 int ret; 57 58 ret = kv_notify_message_to_smu(rdev, PPSMC_MSG_SCLKDPM_GetEnabledMask); 59 60 if (ret == 0) 61 *enable_mask = RREG32_SMC(SMC_SYSCON_MSG_ARG_0); 62 63 return ret; 64 } 65 66 int kv_send_msg_to_smc_with_parameter(struct radeon_device *rdev, 67 PPSMC_Msg msg, u32 parameter) 68 { 69 70 WREG32(SMC_MSG_ARG_0, parameter); 71 72 return kv_notify_message_to_smu(rdev, msg); 73 } 74 75 static int kv_set_smc_sram_address(struct radeon_device *rdev, 76 u32 smc_address, u32 limit) 77 { 78 if (smc_address & 3) 79 return -EINVAL; 80 if ((smc_address + 3) > limit) 81 return -EINVAL; 82 83 WREG32(SMC_IND_INDEX_0, smc_address); 84 WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0); 85 86 return 0; 87 } 88 89 int kv_read_smc_sram_dword(struct radeon_device *rdev, u32 smc_address, 90 u32 *value, u32 limit) 91 { 92 int ret; 93 94 ret = kv_set_smc_sram_address(rdev, smc_address, limit); 95 if (ret) 96 return ret; 97 98 *value = RREG32(SMC_IND_DATA_0); 99 return 0; 100 } 101 102 int kv_smc_dpm_enable(struct radeon_device *rdev, bool enable) 103 { 104 if (enable) 105 return kv_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Enable); 106 else 107 return kv_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Disable); 108 } 109 110 int kv_copy_bytes_to_smc(struct radeon_device *rdev, 111 u32 smc_start_address, 112 const u8 *src, u32 byte_count, u32 limit) 113 { 114 int ret; 115 u32 data, original_data, addr, extra_shift, t_byte, count, mask; 116 117 if ((smc_start_address + byte_count) > limit) 118 return -EINVAL; 119 120 addr = smc_start_address; 121 t_byte = addr & 3; 122 123 /* RMW for the initial bytes */ 124 if (t_byte != 0) { 125 addr -= t_byte; 126 127 ret = kv_set_smc_sram_address(rdev, addr, limit); 128 if (ret) 129 return ret; 130 131 original_data = RREG32(SMC_IND_DATA_0); 132 133 data = 0; 134 mask = 0; 135 count = 4; 136 while (count > 0) { 137 if (t_byte > 0) { 138 mask = (mask << 8) | 0xff; 139 t_byte--; 140 } else if (byte_count > 0) { 141 data = (data << 8) + *src++; 142 byte_count--; 143 mask <<= 8; 144 } else { 145 data <<= 8; 146 mask = (mask << 8) | 0xff; 147 } 148 count--; 149 } 150 151 data |= original_data & mask; 152 153 ret = kv_set_smc_sram_address(rdev, addr, limit); 154 if (ret) 155 return ret; 156 157 WREG32(SMC_IND_DATA_0, data); 158 159 addr += 4; 160 } 161 162 while (byte_count >= 4) { 163 /* SMC address space is BE */ 164 data = (src[0] << 24) + (src[1] << 16) + (src[2] << 8) + src[3]; 165 166 ret = kv_set_smc_sram_address(rdev, addr, limit); 167 if (ret) 168 return ret; 169 170 WREG32(SMC_IND_DATA_0, data); 171 172 src += 4; 173 byte_count -= 4; 174 addr += 4; 175 } 176 177 /* RMW for the final bytes */ 178 if (byte_count > 0) { 179 data = 0; 180 181 ret = kv_set_smc_sram_address(rdev, addr, limit); 182 if (ret) 183 return ret; 184 185 original_data= RREG32(SMC_IND_DATA_0); 186 187 extra_shift = 8 * (4 - byte_count); 188 189 while (byte_count > 0) { 190 /* SMC address space is BE */ 191 data = (data << 8) + *src++; 192 byte_count--; 193 } 194 195 data <<= extra_shift; 196 197 data |= (original_data & ~((~0UL) << extra_shift)); 198 199 ret = kv_set_smc_sram_address(rdev, addr, limit); 200 if (ret) 201 return ret; 202 203 WREG32(SMC_IND_DATA_0, data); 204 } 205 return 0; 206 } 207 208