diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/kv_smc.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/kv_smc.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/kv_smc.c b/drivers/gpu/drm/radeon/kv_smc.c new file mode 100644 index 000000000000..34a226d7e34a --- /dev/null +++ b/drivers/gpu/drm/radeon/kv_smc.c @@ -0,0 +1,207 @@ +/* + * Copyright 2013 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 + */ + +#include "drmP.h" +#include "radeon.h" +#include "cikd.h" +#include "kv_dpm.h" + +int kv_notify_message_to_smu(struct radeon_device *rdev, u32 id) +{ + u32 i; + u32 tmp = 0; + + WREG32(SMC_MESSAGE_0, id & SMC_MSG_MASK); + + for (i = 0; i < rdev->usec_timeout; i++) { + if ((RREG32(SMC_RESP_0) & SMC_RESP_MASK) != 0) + break; + udelay(1); + } + tmp = RREG32(SMC_RESP_0) & SMC_RESP_MASK; + + if (tmp != 1) { + if (tmp == 0xFF) + return -EINVAL; + else if (tmp == 0xFE) + return -EINVAL; + } + + return 0; +} + +int kv_dpm_get_enable_mask(struct radeon_device *rdev, u32 *enable_mask) +{ + int ret; + + ret = kv_notify_message_to_smu(rdev, PPSMC_MSG_SCLKDPM_GetEnabledMask); + + if (ret == 0) + *enable_mask = RREG32_SMC(SMC_SYSCON_MSG_ARG_0); + + return ret; +} + +int kv_send_msg_to_smc_with_parameter(struct radeon_device *rdev, + PPSMC_Msg msg, u32 parameter) +{ + + WREG32(SMC_MSG_ARG_0, parameter); + + return kv_notify_message_to_smu(rdev, msg); +} + +static int kv_set_smc_sram_address(struct radeon_device *rdev, + u32 smc_address, u32 limit) +{ + if (smc_address & 3) + return -EINVAL; + if ((smc_address + 3) > limit) + return -EINVAL; + + WREG32(SMC_IND_INDEX_0, smc_address); + WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0); + + return 0; +} + +int kv_read_smc_sram_dword(struct radeon_device *rdev, u32 smc_address, + u32 *value, u32 limit) +{ + int ret; + + ret = kv_set_smc_sram_address(rdev, smc_address, limit); + if (ret) + return ret; + + *value = RREG32(SMC_IND_DATA_0); + return 0; +} + +int kv_smc_dpm_enable(struct radeon_device *rdev, bool enable) +{ + if (enable) + return kv_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Enable); + else + return kv_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Disable); +} + +int kv_copy_bytes_to_smc(struct radeon_device *rdev, + u32 smc_start_address, + const u8 *src, u32 byte_count, u32 limit) +{ + int ret; + u32 data, original_data, addr, extra_shift, t_byte, count, mask; + + if ((smc_start_address + byte_count) > limit) + return -EINVAL; + + addr = smc_start_address; + t_byte = addr & 3; + + /* RMW for the initial bytes */ + if (t_byte != 0) { + addr -= t_byte; + + ret = kv_set_smc_sram_address(rdev, addr, limit); + if (ret) + return ret; + + original_data = RREG32(SMC_IND_DATA_0); + + data = 0; + mask = 0; + count = 4; + while (count > 0) { + if (t_byte > 0) { + mask = (mask << 8) | 0xff; + t_byte--; + } else if (byte_count > 0) { + data = (data << 8) + *src++; + byte_count--; + mask <<= 8; + } else { + data <<= 8; + mask = (mask << 8) | 0xff; + } + count--; + } + + data |= original_data & mask; + + ret = kv_set_smc_sram_address(rdev, addr, limit); + if (ret) + return ret; + + WREG32(SMC_IND_DATA_0, data); + + addr += 4; + } + + while (byte_count >= 4) { + /* SMC address space is BE */ + data = (src[0] << 24) + (src[1] << 16) + (src[2] << 8) + src[3]; + + ret = kv_set_smc_sram_address(rdev, addr, limit); + if (ret) + return ret; + + WREG32(SMC_IND_DATA_0, data); + + src += 4; + byte_count -= 4; + addr += 4; + } + + /* RMW for the final bytes */ + if (byte_count > 0) { + data = 0; + + ret = kv_set_smc_sram_address(rdev, addr, limit); + if (ret) + return ret; + + original_data= RREG32(SMC_IND_DATA_0); + + extra_shift = 8 * (4 - byte_count); + + while (byte_count > 0) { + /* SMC address space is BE */ + data = (data << 8) + *src++; + byte_count--; + } + + data <<= extra_shift; + + data |= (original_data & ~((~0UL) << extra_shift)); + + ret = kv_set_smc_sram_address(rdev, addr, limit); + if (ret) + return ret; + + WREG32(SMC_IND_DATA_0, data); + } + return 0; +} + |