diff options
Diffstat (limited to 'src/import/chips/p9/procedures/hwp')
| -rw-r--r-- | src/import/chips/p9/procedures/hwp/nest/p9_pcie_config.C | 43 |
1 files changed, 32 insertions, 11 deletions
diff --git a/src/import/chips/p9/procedures/hwp/nest/p9_pcie_config.C b/src/import/chips/p9/procedures/hwp/nest/p9_pcie_config.C index d9890e11c..412d6406a 100644 --- a/src/import/chips/p9/procedures/hwp/nest/p9_pcie_config.C +++ b/src/import/chips/p9/procedures/hwp/nest/p9_pcie_config.C @@ -5,7 +5,7 @@ /* */ /* OpenPOWER HostBoot Project */ /* */ -/* Contributors Listed Below - COPYRIGHT 2015,2018 */ +/* Contributors Listed Below - COPYRIGHT 2015,2019 */ /* [+] International Business Machines Corp. */ /* */ /* */ @@ -60,8 +60,6 @@ const uint64_t PCI_NFIR_MASK_REG = 0x0030001C00000000ULL; const uint8_t PEC_PBCQ_HWCFG_HANG_POLL_SCALE = 0x1; const uint8_t PEC_PBCQ_HWCFG_DATA_POLL_SCALE = 0x1; const uint8_t PEC_PBCQ_HWCFG_HANG_PE_SCALE = 0x1; -const uint8_t PEC_PBCQ_HWCFG_P9_CACHE_INJ_MODE = 0x3; -const uint8_t PEC_PBCQ_HWCFG_P9_CACHE_INJ_RATE = 0x3; // PCI AIB Hardware Configuration Register field definitions const uint8_t PEC_AIB_HWCFG_OSBM_HOL_BLK_CNT = 0x7; @@ -97,6 +95,8 @@ fapi2::ReturnCode p9_pcie_config( fapi2::ATTR_CHIP_EC_FEATURE_HW363246_Type l_hw363246; fapi2::ATTR_CHIP_EC_FEATURE_HW410503_Type l_hw410503; fapi2::ATTR_CHIP_EC_FEATURE_HW423589_OPTION1_Type l_hw423589_option1; + fapi2::ATTR_PROC_PCIE_CACHE_INJ_MODE_Type l_cache_inject_mode; + fapi2::ATTR_PROC_PCIE_CACHE_INJ_THROTTLE_Type l_cache_inject_throttle; fapi2::ATTR_CHIP_EC_FEATURE_EXTENDED_ADDRESSING_MODE_Type l_extended_addressing_mode; fapi2::Target<fapi2::TARGET_TYPE_SYSTEM> FAPI_SYSTEM; @@ -259,20 +259,41 @@ fapi2::ReturnCode p9_pcie_config( } - // Enable P9 Style cache injects if chip is group. + //Attribute to control the cache inject mode. + // DISABLE_CI = 0x0 - Disable cache inject completely. (Reset value default) + // P7_STYLE_CI = 0x1 - Use cache inject design from Power7. + // PCITLP_STYLE_CI = 0x2 - Use PCI TLP Hint bits in packet to perform the cache inject. + // P9_STYLE_CI = 0x3 - Initial attempt as cache inject. Power9 style. (Attribute default) + // + // Different cache inject modes will affect DMA write performance. The attribute default was + // selected based on various workloads and was to be the most optimal settings for Power9. + FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_PROC_PCIE_CACHE_INJ_MODE, l_pec_chiplet, l_cache_inject_mode), + "Error from FAPI_ATTR_GET (ATTR_PROC_PCIE_CACHE_INJ_MODE)"); + + //Attribute to control the cache inject throttling when cache inject is enable. + // DISABLE = 0x0 - Disable cache inject throttling. (Reset value default) + // 16_CYCLES = 0x1 - Perform 1 cache inject every 16 clock cycles. + // 32_CYCLES = 0x3 - Perform 1 cache inject every 32 clock cycles. (Attribute default) + // 64_CYCLES = 0x7 - Perform 1 cache inject every 32 clock cycles. + + // Different throttle rates will affect DMA write performance. The attribute default settings + // were optimal settings found across various workloads. + FAPI_TRY(FAPI_ATTR_GET(fapi2::ATTR_PROC_PCIE_CACHE_INJ_THROTTLE, l_pec_chiplet, l_cache_inject_throttle), + "Error from FAPI_ATTR_GET (ATTR_PROC_PCIE_CACHE_INJ_THROTTLE)"); + + // Disable P9 Style cache injects if chip is node. // CHIP_IS_NODE = 0x01 // CHIP_IS_GROUP = 0x02 - if (l_fabric_pump_mode != 0x1) + if ((l_fabric_pump_mode != fapi2::ENUM_ATTR_PROC_FABRIC_PUMP_MODE_CHIP_IS_NODE) + && (l_cache_inject_mode != fapi2::ENUM_ATTR_PROC_PCIE_CACHE_INJ_MODE_DISABLE_CI)) { - l_buf.insertFromRight<PEC_PBCQHWCFG_REG_PE_WR_CACHE_INJECT_MODE, - PEC_PBCQHWCFG_REG_PE_WR_CACHE_INJECT_MODE_LEN>( - PEC_PBCQ_HWCFG_P9_CACHE_INJ_MODE); + l_buf.insertFromRight<PEC_PBCQHWCFG_REG_PE_WR_CACHE_INJECT_MODE, PEC_PBCQHWCFG_REG_PE_WR_CACHE_INJECT_MODE_LEN> + (l_cache_inject_mode); if (l_hw410503) { - l_buf.insertFromRight<PEC_PBCQHWCFG_REG_PE_WR_CACHE_INJECT_RATE, - PEC_PBCQHWCFG_REG_PE_WR_CACHE_INJECT_RATE_LEN>( - PEC_PBCQ_HWCFG_P9_CACHE_INJ_RATE); + l_buf.insertFromRight<PEC_PBCQHWCFG_REG_PE_WR_CACHE_INJECT_RATE, PEC_PBCQHWCFG_REG_PE_WR_CACHE_INJECT_RATE_LEN> + (l_cache_inject_throttle); } } |
