| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Shravan Kumar Ramani | 7108 | 99.89% | 1 | 25.00% |
| Randy Dunlap | 4 | 0.06% | 1 | 25.00% |
| Miaoqian Lin | 3 | 0.04% | 1 | 25.00% |
| James Hurley | 1 | 0.01% | 1 | 25.00% |
| Total | 7116 | 4 |
// SPDX-License-Identifier: GPL-2.0-only OR Linux-OpenIB /* * Mellanox BlueField Performance Monitoring Counters driver * * This driver provides a sysfs interface for monitoring * performance statistics in BlueField SoC. * * Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved. */ #include <linux/acpi.h> #include <linux/arm-smccc.h> #include <linux/bitfield.h> #include <linux/errno.h> #include <linux/hwmon.h> #include <linux/platform_device.h> #include <linux/string.h> #include <uapi/linux/psci.h> #define MLXBF_PMC_WRITE_REG_32 0x82000009 #define MLXBF_PMC_READ_REG_32 0x8200000A #define MLXBF_PMC_WRITE_REG_64 0x8200000B #define MLXBF_PMC_READ_REG_64 0x8200000C #define MLXBF_PMC_SIP_SVC_UID 0x8200ff01 #define MLXBF_PMC_SIP_SVC_VERSION 0x8200ff03 #define MLXBF_PMC_SVC_REQ_MAJOR 0 #define MLXBF_PMC_SVC_MIN_MINOR 3 #define MLXBF_PMC_SMCCC_ACCESS_VIOLATION -4 #define MLXBF_PMC_EVENT_SET_BF1 0 #define MLXBF_PMC_EVENT_SET_BF2 1 #define MLXBF_PMC_EVENT_INFO_LEN 100 #define MLXBF_PMC_MAX_BLOCKS 30 #define MLXBF_PMC_MAX_ATTRS 30 #define MLXBF_PMC_INFO_SZ 4 #define MLXBF_PMC_REG_SIZE 8 #define MLXBF_PMC_L3C_REG_SIZE 4 #define MLXBF_PMC_TYPE_COUNTER 1 #define MLXBF_PMC_TYPE_REGISTER 0 #define MLXBF_PMC_PERFCTL 0 #define MLXBF_PMC_PERFEVT 1 #define MLXBF_PMC_PERFACC0 4 #define MLXBF_PMC_PERFMON_CONFIG_WR_R_B BIT(0) #define MLXBF_PMC_PERFMON_CONFIG_STROBE BIT(1) #define MLXBF_PMC_PERFMON_CONFIG_ADDR GENMASK_ULL(4, 2) #define MLXBF_PMC_PERFMON_CONFIG_WDATA GENMASK_ULL(60, 5) #define MLXBF_PMC_PERFCTL_FM0 GENMASK_ULL(18, 16) #define MLXBF_PMC_PERFCTL_MS0 GENMASK_ULL(21, 20) #define MLXBF_PMC_PERFCTL_ACCM0 GENMASK_ULL(26, 24) #define MLXBF_PMC_PERFCTL_AD0 BIT(27) #define MLXBF_PMC_PERFCTL_ETRIG0 GENMASK_ULL(29, 28) #define MLXBF_PMC_PERFCTL_EB0 BIT(30) #define MLXBF_PMC_PERFCTL_EN0 BIT(31) #define MLXBF_PMC_PERFEVT_EVTSEL GENMASK_ULL(31, 24) #define MLXBF_PMC_L3C_PERF_CNT_CFG 0x0 #define MLXBF_PMC_L3C_PERF_CNT_SEL 0x10 #define MLXBF_PMC_L3C_PERF_CNT_SEL_1 0x14 #define MLXBF_PMC_L3C_PERF_CNT_LOW 0x40 #define MLXBF_PMC_L3C_PERF_CNT_HIGH 0x60 #define MLXBF_PMC_L3C_PERF_CNT_CFG_EN BIT(0) #define MLXBF_PMC_L3C_PERF_CNT_CFG_RST BIT(1) #define MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_0 GENMASK(5, 0) #define MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_1 GENMASK(13, 8) #define MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_2 GENMASK(21, 16) #define MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_3 GENMASK(29, 24) #define MLXBF_PMC_L3C_PERF_CNT_SEL_1_CNT_4 GENMASK(5, 0) #define MLXBF_PMC_L3C_PERF_CNT_LOW_VAL GENMASK(31, 0) #define MLXBF_PMC_L3C_PERF_CNT_HIGH_VAL GENMASK(24, 0) /** * struct mlxbf_pmc_attribute - Structure to hold attribute and block info * for each sysfs entry * @dev_attr: Device attribute struct * @index: index to identify counter number within a block * @nr: block number to which the sysfs belongs */ struct mlxbf_pmc_attribute { struct device_attribute dev_attr; int index; int nr; }; /** * struct mlxbf_pmc_block_info - Structure to hold info for each HW block * * @mmio_base: The VA at which the PMC block is mapped * @blk_size: Size of each mapped region * @counters: Number of counters in the block * @type: Type of counters in the block * @attr_counter: Attributes for "counter" sysfs files * @attr_event: Attributes for "event" sysfs files * @attr_event_list: Attributes for "event_list" sysfs files * @attr_enable: Attributes for "enable" sysfs files * @block_attr: All attributes needed for the block * @block_attr_grp: Attribute group for the block */ struct mlxbf_pmc_block_info { void __iomem *mmio_base; size_t blk_size; size_t counters; int type; struct mlxbf_pmc_attribute *attr_counter; struct mlxbf_pmc_attribute *attr_event; struct mlxbf_pmc_attribute attr_event_list; struct mlxbf_pmc_attribute attr_enable; struct attribute *block_attr[MLXBF_PMC_MAX_ATTRS]; struct attribute_group block_attr_grp; }; /** * struct mlxbf_pmc_context - Structure to hold PMC context info * * @pdev: The kernel structure representing the device * @total_blocks: Total number of blocks * @tile_count: Number of tiles in the system * @hwmon_dev: Hwmon device for bfperf * @block_name: Block name * @block: Block info * @groups: Attribute groups from each block * @svc_sreg_support: Whether SMCs are used to access performance registers * @sreg_tbl_perf: Secure register access table number * @event_set: Event set to use */ struct mlxbf_pmc_context { struct platform_device *pdev; uint32_t total_blocks; uint32_t tile_count; struct device *hwmon_dev; const char *block_name[MLXBF_PMC_MAX_BLOCKS]; struct mlxbf_pmc_block_info block[MLXBF_PMC_MAX_BLOCKS]; const struct attribute_group *groups[MLXBF_PMC_MAX_BLOCKS]; bool svc_sreg_support; uint32_t sreg_tbl_perf; unsigned int event_set; }; /** * struct mlxbf_pmc_events - Structure to hold supported events for each block * @evt_num: Event number used to program counters * @evt_name: Name of the event */ struct mlxbf_pmc_events { int evt_num; char *evt_name; }; static const struct mlxbf_pmc_events mlxbf_pmc_pcie_events[] = { { 0x0, "IN_P_PKT_CNT" }, { 0x10, "IN_NP_PKT_CNT" }, { 0x18, "IN_C_PKT_CNT" }, { 0x20, "OUT_P_PKT_CNT" }, { 0x28, "OUT_NP_PKT_CNT" }, { 0x30, "OUT_C_PKT_CNT" }, { 0x38, "IN_P_BYTE_CNT" }, { 0x40, "IN_NP_BYTE_CNT" }, { 0x48, "IN_C_BYTE_CNT" }, { 0x50, "OUT_P_BYTE_CNT" }, { 0x58, "OUT_NP_BYTE_CNT" }, { 0x60, "OUT_C_BYTE_CNT" }, }; static const struct mlxbf_pmc_events mlxbf_pmc_smgen_events[] = { { 0x0, "AW_REQ" }, { 0x1, "AW_BEATS" }, { 0x2, "AW_TRANS" }, { 0x3, "AW_RESP" }, { 0x4, "AW_STL" }, { 0x5, "AW_LAT" }, { 0x6, "AW_REQ_TBU" }, { 0x8, "AR_REQ" }, { 0x9, "AR_BEATS" }, { 0xa, "AR_TRANS" }, { 0xb, "AR_STL" }, { 0xc, "AR_LAT" }, { 0xd, "AR_REQ_TBU" }, { 0xe, "TBU_MISS" }, { 0xf, "TX_DAT_AF" }, { 0x10, "RX_DAT_AF" }, { 0x11, "RETRYQ_CRED" }, }; static const struct mlxbf_pmc_events mlxbf_pmc_trio_events_1[] = { { 0xa0, "TPIO_DATA_BEAT" }, { 0xa1, "TDMA_DATA_BEAT" }, { 0xa2, "MAP_DATA_BEAT" }, { 0xa3, "TXMSG_DATA_BEAT" }, { 0xa4, "TPIO_DATA_PACKET" }, { 0xa5, "TDMA_DATA_PACKET" }, { 0xa6, "MAP_DATA_PACKET" }, { 0xa7, "TXMSG_DATA_PACKET" }, { 0xa8, "TDMA_RT_AF" }, { 0xa9, "TDMA_PBUF_MAC_AF" }, { 0xaa, "TRIO_MAP_WRQ_BUF_EMPTY" }, { 0xab, "TRIO_MAP_CPL_BUF_EMPTY" }, { 0xac, "TRIO_MAP_RDQ0_BUF_EMPTY" }, { 0xad, "TRIO_MAP_RDQ1_BUF_EMPTY" }, { 0xae, "TRIO_MAP_RDQ2_BUF_EMPTY" }, { 0xaf, "TRIO_MAP_RDQ3_BUF_EMPTY" }, { 0xb0, "TRIO_MAP_RDQ4_BUF_EMPTY" }, { 0xb1, "TRIO_MAP_RDQ5_BUF_EMPTY" }, { 0xb2, "TRIO_MAP_RDQ6_BUF_EMPTY" }, { 0xb3, "TRIO_MAP_RDQ7_BUF_EMPTY" }, }; static const struct mlxbf_pmc_events mlxbf_pmc_trio_events_2[] = { { 0xa0, "TPIO_DATA_BEAT" }, { 0xa1, "TDMA_DATA_BEAT" }, { 0xa2, "MAP_DATA_BEAT" }, { 0xa3, "TXMSG_DATA_BEAT" }, { 0xa4, "TPIO_DATA_PACKET" }, { 0xa5, "TDMA_DATA_PACKET" }, { 0xa6, "MAP_DATA_PACKET" }, { 0xa7, "TXMSG_DATA_PACKET" }, { 0xa8, "TDMA_RT_AF" }, { 0xa9, "TDMA_PBUF_MAC_AF" }, { 0xaa, "TRIO_MAP_WRQ_BUF_EMPTY" }, { 0xab, "TRIO_MAP_CPL_BUF_EMPTY" }, { 0xac, "TRIO_MAP_RDQ0_BUF_EMPTY" }, { 0xad, "TRIO_MAP_RDQ1_BUF_EMPTY" }, { 0xae, "TRIO_MAP_RDQ2_BUF_EMPTY" }, { 0xaf, "TRIO_MAP_RDQ3_BUF_EMPTY" }, { 0xb0, "TRIO_MAP_RDQ4_BUF_EMPTY" }, { 0xb1, "TRIO_MAP_RDQ5_BUF_EMPTY" }, { 0xb2, "TRIO_MAP_RDQ6_BUF_EMPTY" }, { 0xb3, "TRIO_MAP_RDQ7_BUF_EMPTY" }, { 0xb4, "TRIO_RING_TX_FLIT_CH0" }, { 0xb5, "TRIO_RING_TX_FLIT_CH1" }, { 0xb6, "TRIO_RING_TX_FLIT_CH2" }, { 0xb7, "TRIO_RING_TX_FLIT_CH3" }, { 0xb8, "TRIO_RING_TX_FLIT_CH4" }, { 0xb9, "TRIO_RING_RX_FLIT_CH0" }, { 0xba, "TRIO_RING_RX_FLIT_CH1" }, { 0xbb, "TRIO_RING_RX_FLIT_CH2" }, { 0xbc, "TRIO_RING_RX_FLIT_CH3" }, }; static const struct mlxbf_pmc_events mlxbf_pmc_ecc_events[] = { { 0x100, "ECC_SINGLE_ERROR_CNT" }, { 0x104, "ECC_DOUBLE_ERROR_CNT" }, { 0x114, "SERR_INJ" }, { 0x118, "DERR_INJ" }, { 0x124, "ECC_SINGLE_ERROR_0" }, { 0x164, "ECC_DOUBLE_ERROR_0" }, { 0x340, "DRAM_ECC_COUNT" }, { 0x344, "DRAM_ECC_INJECT" }, { 0x348, "DRAM_ECC_ERROR" }, }; static const struct mlxbf_pmc_events mlxbf_pmc_mss_events[] = { { 0xc0, "RXREQ_MSS" }, { 0xc1, "RXDAT_MSS" }, { 0xc2, "TXRSP_MSS" }, { 0xc3, "TXDAT_MSS" }, }; static const struct mlxbf_pmc_events mlxbf_pmc_hnf_events[] = { { 0x45, "HNF_REQUESTS" }, { 0x46, "HNF_REJECTS" }, { 0x47, "ALL_BUSY" }, { 0x48, "MAF_BUSY" }, { 0x49, "MAF_REQUESTS" }, { 0x4a, "RNF_REQUESTS" }, { 0x4b, "REQUEST_TYPE" }, { 0x4c, "MEMORY_READS" }, { 0x4d, "MEMORY_WRITES" }, { 0x4e, "VICTIM_WRITE" }, { 0x4f, "POC_FULL" }, { 0x50, "POC_FAIL" }, { 0x51, "POC_SUCCESS" }, { 0x52, "POC_WRITES" }, { 0x53, "POC_READS" }, { 0x54, "FORWARD" }, { 0x55, "RXREQ_HNF" }, { 0x56, "RXRSP_HNF" }, { 0x57, "RXDAT_HNF" }, { 0x58, "TXREQ_HNF" }, { 0x59, "TXRSP_HNF" }, { 0x5a, "TXDAT_HNF" }, { 0x5b, "TXSNP_HNF" }, { 0x5c, "INDEX_MATCH" }, { 0x5d, "A72_ACCESS" }, { 0x5e, "IO_ACCESS" }, { 0x5f, "TSO_WRITE" }, { 0x60, "TSO_CONFLICT" }, { 0x61, "DIR_HIT" }, { 0x62, "HNF_ACCEPTS" }, { 0x63, "REQ_BUF_EMPTY" }, { 0x64, "REQ_BUF_IDLE_MAF" }, { 0x65, "TSO_NOARB" }, { 0x66, "TSO_NOARB_CYCLES" }, { 0x67, "MSS_NO_CREDIT" }, { 0x68, "TXDAT_NO_LCRD" }, { 0x69, "TXSNP_NO_LCRD" }, { 0x6a, "TXRSP_NO_LCRD" }, { 0x6b, "TXREQ_NO_LCRD" }, { 0x6c, "TSO_CL_MATCH" }, { 0x6d, "MEMORY_READS_BYPASS" }, { 0x6e, "TSO_NOARB_TIMEOUT" }, { 0x6f, "ALLOCATE" }, { 0x70, "VICTIM" }, { 0x71, "A72_WRITE" }, { 0x72, "A72_READ" }, { 0x73, "IO_WRITE" }, { 0x74, "IO_READ" }, { 0x75, "TSO_REJECT" }, { 0x80, "TXREQ_RN" }, { 0x81, "TXRSP_RN" }, { 0x82, "TXDAT_RN" }, { 0x83, "RXSNP_RN" }, { 0x84, "RXRSP_RN" }, { 0x85, "RXDAT_RN" }, }; static const struct mlxbf_pmc_events mlxbf_pmc_hnfnet_events[] = { { 0x12, "CDN_REQ" }, { 0x13, "DDN_REQ" }, { 0x14, "NDN_REQ" }, { 0x15, "CDN_DIAG_N_OUT_OF_CRED" }, { 0x16, "CDN_DIAG_S_OUT_OF_CRED" }, { 0x17, "CDN_DIAG_E_OUT_OF_CRED" }, { 0x18, "CDN_DIAG_W_OUT_OF_CRED" }, { 0x19, "CDN_DIAG_C_OUT_OF_CRED" }, { 0x1a, "CDN_DIAG_N_EGRESS" }, { 0x1b, "CDN_DIAG_S_EGRESS" }, { 0x1c, "CDN_DIAG_E_EGRESS" }, { 0x1d, "CDN_DIAG_W_EGRESS" }, { 0x1e, "CDN_DIAG_C_EGRESS" }, { 0x1f, "CDN_DIAG_N_INGRESS" }, { 0x20, "CDN_DIAG_S_INGRESS" }, { 0x21, "CDN_DIAG_E_INGRESS" }, { 0x22, "CDN_DIAG_W_INGRESS" }, { 0x23, "CDN_DIAG_C_INGRESS" }, { 0x24, "CDN_DIAG_CORE_SENT" }, { 0x25, "DDN_DIAG_N_OUT_OF_CRED" }, { 0x26, "DDN_DIAG_S_OUT_OF_CRED" }, { 0x27, "DDN_DIAG_E_OUT_OF_CRED" }, { 0x28, "DDN_DIAG_W_OUT_OF_CRED" }, { 0x29, "DDN_DIAG_C_OUT_OF_CRED" }, { 0x2a, "DDN_DIAG_N_EGRESS" }, { 0x2b, "DDN_DIAG_S_EGRESS" }, { 0x2c, "DDN_DIAG_E_EGRESS" }, { 0x2d, "DDN_DIAG_W_EGRESS" }, { 0x2e, "DDN_DIAG_C_EGRESS" }, { 0x2f, "DDN_DIAG_N_INGRESS" }, { 0x30, "DDN_DIAG_S_INGRESS" }, { 0x31, "DDN_DIAG_E_INGRESS" }, { 0x32, "DDN_DIAG_W_INGRESS" }, { 0x33, "DDN_DIAG_C_INGRESS" }, { 0x34, "DDN_DIAG_CORE_SENT" }, { 0x35, "NDN_DIAG_N_OUT_OF_CRED" }, { 0x36, "NDN_DIAG_S_OUT_OF_CRED" }, { 0x37, "NDN_DIAG_E_OUT_OF_CRED" }, { 0x38, "NDN_DIAG_W_OUT_OF_CRED" }, { 0x39, "NDN_DIAG_C_OUT_OF_CRED" }, { 0x3a, "NDN_DIAG_N_EGRESS" }, { 0x3b, "NDN_DIAG_S_EGRESS" }, { 0x3c, "NDN_DIAG_E_EGRESS" }, { 0x3d, "NDN_DIAG_W_EGRESS" }, { 0x3e, "NDN_DIAG_C_EGRESS" }, { 0x3f, "NDN_DIAG_N_INGRESS" }, { 0x40, "NDN_DIAG_S_INGRESS" }, { 0x41, "NDN_DIAG_E_INGRESS" }, { 0x42, "NDN_DIAG_W_INGRESS" }, { 0x43, "NDN_DIAG_C_INGRESS" }, { 0x44, "NDN_DIAG_CORE_SENT" }, }; static const struct mlxbf_pmc_events mlxbf_pmc_l3c_events[] = { { 0x00, "DISABLE" }, { 0x01, "CYCLES" }, { 0x02, "TOTAL_RD_REQ_IN" }, { 0x03, "TOTAL_WR_REQ_IN" }, { 0x04, "TOTAL_WR_DBID_ACK" }, { 0x05, "TOTAL_WR_DATA_IN" }, { 0x06, "TOTAL_WR_COMP" }, { 0x07, "TOTAL_RD_DATA_OUT" }, { 0x08, "TOTAL_CDN_REQ_IN_BANK0" }, { 0x09, "TOTAL_CDN_REQ_IN_BANK1" }, { 0x0a, "TOTAL_DDN_REQ_IN_BANK0" }, { 0x0b, "TOTAL_DDN_REQ_IN_BANK1" }, { 0x0c, "TOTAL_EMEM_RD_RES_IN_BANK0" }, { 0x0d, "TOTAL_EMEM_RD_RES_IN_BANK1" }, { 0x0e, "TOTAL_CACHE_RD_RES_IN_BANK0" }, { 0x0f, "TOTAL_CACHE_RD_RES_IN_BANK1" }, { 0x10, "TOTAL_EMEM_RD_REQ_BANK0" }, { 0x11, "TOTAL_EMEM_RD_REQ_BANK1" }, { 0x12, "TOTAL_EMEM_WR_REQ_BANK0" }, { 0x13, "TOTAL_EMEM_WR_REQ_BANK1" }, { 0x14, "TOTAL_RD_REQ_OUT" }, { 0x15, "TOTAL_WR_REQ_OUT" }, { 0x16, "TOTAL_RD_RES_IN" }, { 0x17, "HITS_BANK0" }, { 0x18, "HITS_BANK1" }, { 0x19, "MISSES_BANK0" }, { 0x1a, "MISSES_BANK1" }, { 0x1b, "ALLOCATIONS_BANK0" }, { 0x1c, "ALLOCATIONS_BANK1" }, { 0x1d, "EVICTIONS_BANK0" }, { 0x1e, "EVICTIONS_BANK1" }, { 0x1f, "DBID_REJECT" }, { 0x20, "WRDB_REJECT_BANK0" }, { 0x21, "WRDB_REJECT_BANK1" }, { 0x22, "CMDQ_REJECT_BANK0" }, { 0x23, "CMDQ_REJECT_BANK1" }, { 0x24, "COB_REJECT_BANK0" }, { 0x25, "COB_REJECT_BANK1" }, { 0x26, "TRB_REJECT_BANK0" }, { 0x27, "TRB_REJECT_BANK1" }, { 0x28, "TAG_REJECT_BANK0" }, { 0x29, "TAG_REJECT_BANK1" }, { 0x2a, "ANY_REJECT_BANK0" }, { 0x2b, "ANY_REJECT_BANK1" }, }; static struct mlxbf_pmc_context *pmc; /* UUID used to probe ATF service. */ static const char *mlxbf_pmc_svc_uuid_str = "89c036b4-e7d7-11e6-8797-001aca00bfc4"; /* Calls an SMC to access a performance register */ static int mlxbf_pmc_secure_read(void __iomem *addr, uint32_t command, uint64_t *result) { struct arm_smccc_res res; int status, err = 0; arm_smccc_smc(command, pmc->sreg_tbl_perf, (uintptr_t)addr, 0, 0, 0, 0, 0, &res); status = res.a0; switch (status) { case PSCI_RET_NOT_SUPPORTED: err = -EINVAL; break; case MLXBF_PMC_SMCCC_ACCESS_VIOLATION: err = -EACCES; break; default: *result = res.a1; break; } return err; } /* Read from a performance counter */ static int mlxbf_pmc_read(void __iomem *addr, uint32_t command, uint64_t *result) { if (pmc->svc_sreg_support) return mlxbf_pmc_secure_read(addr, command, result); if (command == MLXBF_PMC_READ_REG_32) *result = readl(addr); else *result = readq(addr); return 0; } /* Convenience function for 32-bit reads */ static int mlxbf_pmc_readl(void __iomem *addr, uint32_t *result) { uint64_t read_out; int status; status = mlxbf_pmc_read(addr, MLXBF_PMC_READ_REG_32, &read_out); if (status) return status; *result = (uint32_t)read_out; return 0; } /* Calls an SMC to access a performance register */ static int mlxbf_pmc_secure_write(void __iomem *addr, uint32_t command, uint64_t value) { struct arm_smccc_res res; int status, err = 0; arm_smccc_smc(command, pmc->sreg_tbl_perf, value, (uintptr_t)addr, 0, 0, 0, 0, &res); status = res.a0; switch (status) { case PSCI_RET_NOT_SUPPORTED: err = -EINVAL; break; case MLXBF_PMC_SMCCC_ACCESS_VIOLATION: err = -EACCES; break; } return err; } /* Write to a performance counter */ static int mlxbf_pmc_write(void __iomem *addr, int command, uint64_t value) { if (pmc->svc_sreg_support) return mlxbf_pmc_secure_write(addr, command, value); if (command == MLXBF_PMC_WRITE_REG_32) writel(value, addr); else writeq(value, addr); return 0; } /* Check if the register offset is within the mapped region for the block */ static bool mlxbf_pmc_valid_range(int blk_num, uint32_t offset) { if ((offset >= 0) && !(offset % MLXBF_PMC_REG_SIZE) && (offset + MLXBF_PMC_REG_SIZE <= pmc->block[blk_num].blk_size)) return true; /* inside the mapped PMC space */ return false; } /* Get the event list corresponding to a certain block */ static const struct mlxbf_pmc_events *mlxbf_pmc_event_list(const char *blk, int *size) { const struct mlxbf_pmc_events *events; if (strstr(blk, "tilenet")) { events = mlxbf_pmc_hnfnet_events; *size = ARRAY_SIZE(mlxbf_pmc_hnfnet_events); } else if (strstr(blk, "tile")) { events = mlxbf_pmc_hnf_events; *size = ARRAY_SIZE(mlxbf_pmc_hnf_events); } else if (strstr(blk, "triogen")) { events = mlxbf_pmc_smgen_events; *size = ARRAY_SIZE(mlxbf_pmc_smgen_events); } else if (strstr(blk, "trio")) { switch (pmc->event_set) { case MLXBF_PMC_EVENT_SET_BF1: events = mlxbf_pmc_trio_events_1; *size = ARRAY_SIZE(mlxbf_pmc_trio_events_1); break; case MLXBF_PMC_EVENT_SET_BF2: events = mlxbf_pmc_trio_events_2; *size = ARRAY_SIZE(mlxbf_pmc_trio_events_2); break; default: events = NULL; *size = 0; break; } } else if (strstr(blk, "mss")) { events = mlxbf_pmc_mss_events; *size = ARRAY_SIZE(mlxbf_pmc_mss_events); } else if (strstr(blk, "ecc")) { events = mlxbf_pmc_ecc_events; *size = ARRAY_SIZE(mlxbf_pmc_ecc_events); } else if (strstr(blk, "pcie")) { events = mlxbf_pmc_pcie_events; *size = ARRAY_SIZE(mlxbf_pmc_pcie_events); } else if (strstr(blk, "l3cache")) { events = mlxbf_pmc_l3c_events; *size = ARRAY_SIZE(mlxbf_pmc_l3c_events); } else if (strstr(blk, "gic")) { events = mlxbf_pmc_smgen_events; *size = ARRAY_SIZE(mlxbf_pmc_smgen_events); } else if (strstr(blk, "smmu")) { events = mlxbf_pmc_smgen_events; *size = ARRAY_SIZE(mlxbf_pmc_smgen_events); } else { events = NULL; *size = 0; } return events; } /* Get the event number given the name */ static int mlxbf_pmc_get_event_num(const char *blk, const char *evt) { const struct mlxbf_pmc_events *events; int i, size; events = mlxbf_pmc_event_list(blk, &size); if (!events) return -EINVAL; for (i = 0; i < size; ++i) { if (!strcmp(evt, events[i].evt_name)) return events[i].evt_num; } return -ENODEV; } /* Get the event number given the name */ static char *mlxbf_pmc_get_event_name(const char *blk, int evt) { const struct mlxbf_pmc_events *events; int i, size; events = mlxbf_pmc_event_list(blk, &size); if (!events) return NULL; for (i = 0; i < size; ++i) { if (evt == events[i].evt_num) return events[i].evt_name; } return NULL; } /* Method to enable/disable/reset l3cache counters */ static int mlxbf_pmc_config_l3_counters(int blk_num, bool enable, bool reset) { uint32_t perfcnt_cfg = 0; if (enable) perfcnt_cfg |= MLXBF_PMC_L3C_PERF_CNT_CFG_EN; if (reset) perfcnt_cfg |= MLXBF_PMC_L3C_PERF_CNT_CFG_RST; return mlxbf_pmc_write(pmc->block[blk_num].mmio_base + MLXBF_PMC_L3C_PERF_CNT_CFG, MLXBF_PMC_WRITE_REG_32, perfcnt_cfg); } /* Method to handle l3cache counter programming */ static int mlxbf_pmc_program_l3_counter(int blk_num, uint32_t cnt_num, uint32_t evt) { uint32_t perfcnt_sel_1 = 0; uint32_t perfcnt_sel = 0; uint32_t *wordaddr; void __iomem *pmcaddr; int ret; /* Disable all counters before programming them */ if (mlxbf_pmc_config_l3_counters(blk_num, false, false)) return -EINVAL; /* Select appropriate register information */ switch (cnt_num) { case 0 ... 3: pmcaddr = pmc->block[blk_num].mmio_base + MLXBF_PMC_L3C_PERF_CNT_SEL; wordaddr = &perfcnt_sel; break; case 4: pmcaddr = pmc->block[blk_num].mmio_base + MLXBF_PMC_L3C_PERF_CNT_SEL_1; wordaddr = &perfcnt_sel_1; break; default: return -EINVAL; } ret = mlxbf_pmc_readl(pmcaddr, wordaddr); if (ret) return ret; switch (cnt_num) { case 0: perfcnt_sel &= ~MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_0; perfcnt_sel |= FIELD_PREP(MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_0, evt); break; case 1: perfcnt_sel &= ~MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_1; perfcnt_sel |= FIELD_PREP(MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_1, evt); break; case 2: perfcnt_sel &= ~MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_2; perfcnt_sel |= FIELD_PREP(MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_2, evt); break; case 3: perfcnt_sel &= ~MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_3; perfcnt_sel |= FIELD_PREP(MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_3, evt); break; case 4: perfcnt_sel_1 &= ~MLXBF_PMC_L3C_PERF_CNT_SEL_1_CNT_4; perfcnt_sel_1 |= FIELD_PREP(MLXBF_PMC_L3C_PERF_CNT_SEL_1_CNT_4, evt); break; default: return -EINVAL; } return mlxbf_pmc_write(pmcaddr, MLXBF_PMC_WRITE_REG_32, *wordaddr); } /* Method to program a counter to monitor an event */ static int mlxbf_pmc_program_counter(int blk_num, uint32_t cnt_num, uint32_t evt, bool is_l3) { uint64_t perfctl, perfevt, perfmon_cfg; if (cnt_num >= pmc->block[blk_num].counters) return -ENODEV; if (is_l3) return mlxbf_pmc_program_l3_counter(blk_num, cnt_num, evt); /* Configure the counter */ perfctl = FIELD_PREP(MLXBF_PMC_PERFCTL_EN0, 1); perfctl |= FIELD_PREP(MLXBF_PMC_PERFCTL_EB0, 0); perfctl |= FIELD_PREP(MLXBF_PMC_PERFCTL_ETRIG0, 1); perfctl |= FIELD_PREP(MLXBF_PMC_PERFCTL_AD0, 0); perfctl |= FIELD_PREP(MLXBF_PMC_PERFCTL_ACCM0, 0); perfctl |= FIELD_PREP(MLXBF_PMC_PERFCTL_MS0, 0); perfctl |= FIELD_PREP(MLXBF_PMC_PERFCTL_FM0, 0); perfmon_cfg = FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_WDATA, perfctl); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_ADDR, MLXBF_PMC_PERFCTL); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_STROBE, 1); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_WR_R_B, 1); if (mlxbf_pmc_write(pmc->block[blk_num].mmio_base + cnt_num * MLXBF_PMC_REG_SIZE, MLXBF_PMC_WRITE_REG_64, perfmon_cfg)) return -EFAULT; /* Select the event */ perfevt = FIELD_PREP(MLXBF_PMC_PERFEVT_EVTSEL, evt); perfmon_cfg = FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_WDATA, perfevt); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_ADDR, MLXBF_PMC_PERFEVT); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_STROBE, 1); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_WR_R_B, 1); if (mlxbf_pmc_write(pmc->block[blk_num].mmio_base + cnt_num * MLXBF_PMC_REG_SIZE, MLXBF_PMC_WRITE_REG_64, perfmon_cfg)) return -EFAULT; /* Clear the accumulator */ perfmon_cfg = FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_ADDR, MLXBF_PMC_PERFACC0); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_STROBE, 1); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_WR_R_B, 1); if (mlxbf_pmc_write(pmc->block[blk_num].mmio_base + cnt_num * MLXBF_PMC_REG_SIZE, MLXBF_PMC_WRITE_REG_64, perfmon_cfg)) return -EFAULT; return 0; } /* Method to handle l3 counter reads */ static int mlxbf_pmc_read_l3_counter(int blk_num, uint32_t cnt_num, uint64_t *result) { uint32_t perfcnt_low = 0, perfcnt_high = 0; uint64_t value; int status = 0; status = mlxbf_pmc_readl(pmc->block[blk_num].mmio_base + MLXBF_PMC_L3C_PERF_CNT_LOW + cnt_num * MLXBF_PMC_L3C_REG_SIZE, &perfcnt_low); if (status) return status; status = mlxbf_pmc_readl(pmc->block[blk_num].mmio_base + MLXBF_PMC_L3C_PERF_CNT_HIGH + cnt_num * MLXBF_PMC_L3C_REG_SIZE, &perfcnt_high); if (status) return status; value = perfcnt_high; value = value << 32; value |= perfcnt_low; *result = value; return 0; } /* Method to read the counter value */ static int mlxbf_pmc_read_counter(int blk_num, uint32_t cnt_num, bool is_l3, uint64_t *result) { uint32_t perfcfg_offset, perfval_offset; uint64_t perfmon_cfg; int status; if (cnt_num >= pmc->block[blk_num].counters) return -EINVAL; if (is_l3) return mlxbf_pmc_read_l3_counter(blk_num, cnt_num, result); perfcfg_offset = cnt_num * MLXBF_PMC_REG_SIZE; perfval_offset = perfcfg_offset + pmc->block[blk_num].counters * MLXBF_PMC_REG_SIZE; /* Set counter in "read" mode */ perfmon_cfg = FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_ADDR, MLXBF_PMC_PERFACC0); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_STROBE, 1); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_WR_R_B, 0); status = mlxbf_pmc_write(pmc->block[blk_num].mmio_base + perfcfg_offset, MLXBF_PMC_WRITE_REG_64, perfmon_cfg); if (status) return status; /* Get the counter value */ return mlxbf_pmc_read(pmc->block[blk_num].mmio_base + perfval_offset, MLXBF_PMC_READ_REG_64, result); } /* Method to read L3 block event */ static int mlxbf_pmc_read_l3_event(int blk_num, uint32_t cnt_num, uint64_t *result) { uint32_t perfcnt_sel = 0, perfcnt_sel_1 = 0; uint32_t *wordaddr; void __iomem *pmcaddr; uint64_t evt; /* Select appropriate register information */ switch (cnt_num) { case 0 ... 3: pmcaddr = pmc->block[blk_num].mmio_base + MLXBF_PMC_L3C_PERF_CNT_SEL; wordaddr = &perfcnt_sel; break; case 4: pmcaddr = pmc->block[blk_num].mmio_base + MLXBF_PMC_L3C_PERF_CNT_SEL_1; wordaddr = &perfcnt_sel_1; break; default: return -EINVAL; } if (mlxbf_pmc_readl(pmcaddr, wordaddr)) return -EINVAL; /* Read from appropriate register field for the counter */ switch (cnt_num) { case 0: evt = FIELD_GET(MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_0, perfcnt_sel); break; case 1: evt = FIELD_GET(MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_1, perfcnt_sel); break; case 2: evt = FIELD_GET(MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_2, perfcnt_sel); break; case 3: evt = FIELD_GET(MLXBF_PMC_L3C_PERF_CNT_SEL_CNT_3, perfcnt_sel); break; case 4: evt = FIELD_GET(MLXBF_PMC_L3C_PERF_CNT_SEL_1_CNT_4, perfcnt_sel_1); break; default: return -EINVAL; } *result = evt; return 0; } /* Method to find the event currently being monitored by a counter */ static int mlxbf_pmc_read_event(int blk_num, uint32_t cnt_num, bool is_l3, uint64_t *result) { uint32_t perfcfg_offset, perfval_offset; uint64_t perfmon_cfg, perfevt, perfctl; if (cnt_num >= pmc->block[blk_num].counters) return -EINVAL; if (is_l3) return mlxbf_pmc_read_l3_event(blk_num, cnt_num, result); perfcfg_offset = cnt_num * MLXBF_PMC_REG_SIZE; perfval_offset = perfcfg_offset + pmc->block[blk_num].counters * MLXBF_PMC_REG_SIZE; /* Set counter in "read" mode */ perfmon_cfg = FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_ADDR, MLXBF_PMC_PERFCTL); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_STROBE, 1); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_WR_R_B, 0); if (mlxbf_pmc_write(pmc->block[blk_num].mmio_base + perfcfg_offset, MLXBF_PMC_WRITE_REG_64, perfmon_cfg)) return -EFAULT; /* Check if the counter is enabled */ if (mlxbf_pmc_read(pmc->block[blk_num].mmio_base + perfval_offset, MLXBF_PMC_READ_REG_64, &perfctl)) return -EFAULT; if (!FIELD_GET(MLXBF_PMC_PERFCTL_EN0, perfctl)) return -EINVAL; /* Set counter in "read" mode */ perfmon_cfg = FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_ADDR, MLXBF_PMC_PERFEVT); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_STROBE, 1); perfmon_cfg |= FIELD_PREP(MLXBF_PMC_PERFMON_CONFIG_WR_R_B, 0); if (mlxbf_pmc_write(pmc->block[blk_num].mmio_base + perfcfg_offset, MLXBF_PMC_WRITE_REG_64, perfmon_cfg)) return -EFAULT; /* Get the event number */ if (mlxbf_pmc_read(pmc->block[blk_num].mmio_base + perfval_offset, MLXBF_PMC_READ_REG_64, &perfevt)) return -EFAULT; *result = FIELD_GET(MLXBF_PMC_PERFEVT_EVTSEL, perfevt); return 0; } /* Method to read a register */ static int mlxbf_pmc_read_reg(int blk_num, uint32_t offset, uint64_t *result) { uint32_t ecc_out; if (strstr(pmc->block_name[blk_num], "ecc")) { if (mlxbf_pmc_readl(pmc->block[blk_num].mmio_base + offset, &ecc_out)) return -EFAULT; *result = ecc_out; return 0; } if (mlxbf_pmc_valid_range(blk_num, offset)) return mlxbf_pmc_read(pmc->block[blk_num].mmio_base + offset, MLXBF_PMC_READ_REG_64, result); return -EINVAL; } /* Method to write to a register */ static int mlxbf_pmc_write_reg(int blk_num, uint32_t offset, uint64_t data) { if (strstr(pmc->block_name[blk_num], "ecc")) { return mlxbf_pmc_write(pmc->block[blk_num].mmio_base + offset, MLXBF_PMC_WRITE_REG_32, data); } if (mlxbf_pmc_valid_range(blk_num, offset)) return mlxbf_pmc_write(pmc->block[blk_num].mmio_base + offset, MLXBF_PMC_WRITE_REG_64, data); return -EINVAL; } /* Show function for "counter" sysfs files */ static ssize_t mlxbf_pmc_counter_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mlxbf_pmc_attribute *attr_counter = container_of( attr, struct mlxbf_pmc_attribute, dev_attr); int blk_num, cnt_num, offset; bool is_l3 = false; uint64_t value; blk_num = attr_counter->nr; cnt_num = attr_counter->index; if (strstr(pmc->block_name[blk_num], "l3cache")) is_l3 = true; if (pmc->block[blk_num].type == MLXBF_PMC_TYPE_COUNTER) { if (mlxbf_pmc_read_counter(blk_num, cnt_num, is_l3, &value)) return -EINVAL; } else if (pmc->block[blk_num].type == MLXBF_PMC_TYPE_REGISTER) { offset = mlxbf_pmc_get_event_num(pmc->block_name[blk_num], attr->attr.name); if (offset < 0) return -EINVAL; if (mlxbf_pmc_read_reg(blk_num, offset, &value)) return -EINVAL; } else return -EINVAL; return sprintf(buf, "0x%llx\n", value); } /* Store function for "counter" sysfs files */ static ssize_t mlxbf_pmc_counter_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct mlxbf_pmc_attribute *attr_counter = container_of( attr, struct mlxbf_pmc_attribute, dev_attr); int blk_num, cnt_num, offset, err, data; bool is_l3 = false; uint64_t evt_num; blk_num = attr_counter->nr; cnt_num = attr_counter->index; err = kstrtoint(buf, 0, &data); if (err < 0) return err; /* Allow non-zero writes only to the ecc regs */ if (!(strstr(pmc->block_name[blk_num], "ecc")) && data) return -EINVAL; /* Do not allow writes to the L3C regs */ if (strstr(pmc->block_name[blk_num], "l3cache")) return -EINVAL; if (pmc->block[blk_num].type == MLXBF_PMC_TYPE_COUNTER) { err = mlxbf_pmc_read_event(blk_num, cnt_num, is_l3, &evt_num); if (err) return err; err = mlxbf_pmc_program_counter(blk_num, cnt_num, evt_num, is_l3); if (err) return err; } else if (pmc->block[blk_num].type == MLXBF_PMC_TYPE_REGISTER) { offset = mlxbf_pmc_get_event_num(pmc->block_name[blk_num], attr->attr.name); if (offset < 0) return -EINVAL; err = mlxbf_pmc_write_reg(blk_num, offset, data); if (err) return err; } else return -EINVAL; return count; } /* Show function for "event" sysfs files */ static ssize_t mlxbf_pmc_event_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mlxbf_pmc_attribute *attr_event = container_of( attr, struct mlxbf_pmc_attribute, dev_attr); int blk_num, cnt_num, err; bool is_l3 = false; uint64_t evt_num; char *evt_name; blk_num = attr_event->nr; cnt_num = attr_event->index; if (strstr(pmc->block_name[blk_num], "l3cache")) is_l3 = true; err = mlxbf_pmc_read_event(blk_num, cnt_num, is_l3, &evt_num); if (err) return sprintf(buf, "No event being monitored\n"); evt_name = mlxbf_pmc_get_event_name(pmc->block_name[blk_num], evt_num); if (!evt_name) return -EINVAL; return sprintf(buf, "0x%llx: %s\n", evt_num, evt_name); } /* Store function for "event" sysfs files */ static ssize_t mlxbf_pmc_event_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct mlxbf_pmc_attribute *attr_event = container_of( attr, struct mlxbf_pmc_attribute, dev_attr); int blk_num, cnt_num, evt_num, err; bool is_l3 = false; blk_num = attr_event->nr; cnt_num = attr_event->index; if (isalpha(buf[0])) { evt_num = mlxbf_pmc_get_event_num(pmc->block_name[blk_num], buf); if (evt_num < 0) return -EINVAL; } else { err = kstrtoint(buf, 0, &evt_num); if (err < 0) return err; } if (strstr(pmc->block_name[blk_num], "l3cache")) is_l3 = true; err = mlxbf_pmc_program_counter(blk_num, cnt_num, evt_num, is_l3); if (err) return err; return count; } /* Show function for "event_list" sysfs files */ static ssize_t mlxbf_pmc_event_list_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mlxbf_pmc_attribute *attr_event_list = container_of( attr, struct mlxbf_pmc_attribute, dev_attr); int blk_num, i, size, len = 0, ret = 0; const struct mlxbf_pmc_events *events; char e_info[MLXBF_PMC_EVENT_INFO_LEN]; blk_num = attr_event_list->nr; events = mlxbf_pmc_event_list(pmc->block_name[blk_num], &size); if (!events) return -EINVAL; for (i = 0, buf[0] = '\0'; i < size; ++i) { len += sprintf(e_info, "0x%x: %s\n", events[i].evt_num, events[i].evt_name); if (len > PAGE_SIZE) break; strcat(buf, e_info); ret = len; } return ret; } /* Show function for "enable" sysfs files - only for l3cache */ static ssize_t mlxbf_pmc_enable_show(struct device *dev, struct device_attribute *attr, char *buf) { struct mlxbf_pmc_attribute *attr_enable = container_of( attr, struct mlxbf_pmc_attribute, dev_attr); uint32_t perfcnt_cfg; int blk_num, value; blk_num = attr_enable->nr; if (mlxbf_pmc_readl(pmc->block[blk_num].mmio_base + MLXBF_PMC_L3C_PERF_CNT_CFG, &perfcnt_cfg)) return -EINVAL; value = FIELD_GET(MLXBF_PMC_L3C_PERF_CNT_CFG_EN, perfcnt_cfg); return sprintf(buf, "%d\n", value); } /* Store function for "enable" sysfs files - only for l3cache */ static ssize_t mlxbf_pmc_enable_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct mlxbf_pmc_attribute *attr_enable = container_of( attr, struct mlxbf_pmc_attribute, dev_attr); int err, en, blk_num; blk_num = attr_enable->nr; err = kstrtoint(buf, 0, &en); if (err < 0) return err; if (!en) { err = mlxbf_pmc_config_l3_counters(blk_num, false, false); if (err) return err; } else if (en == 1) { err = mlxbf_pmc_config_l3_counters(blk_num, false, true); if (err) return err; err = mlxbf_pmc_config_l3_counters(blk_num, true, false); if (err) return err; } else return -EINVAL; return count; } /* Populate attributes for blocks with counters to monitor performance */ static int mlxbf_pmc_init_perftype_counter(struct device *dev, int blk_num) { struct mlxbf_pmc_attribute *attr; int i = 0, j = 0; /* "event_list" sysfs to list events supported by the block */ attr = &pmc->block[blk_num].attr_event_list; attr->dev_attr.attr.mode = 0444; attr->dev_attr.show = mlxbf_pmc_event_list_show; attr->nr = blk_num; attr->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL, "event_list"); pmc->block[blk_num].block_attr[i] = &attr->dev_attr.attr; attr = NULL; /* "enable" sysfs to start/stop the counters. Only in L3C blocks */ if (strstr(pmc->block_name[blk_num], "l3cache")) { attr = &pmc->block[blk_num].attr_enable; attr->dev_attr.attr.mode = 0644; attr->dev_attr.show = mlxbf_pmc_enable_show; attr->dev_attr.store = mlxbf_pmc_enable_store; attr->nr = blk_num; attr->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL, "enable"); pmc->block[blk_num].block_attr[++i] = &attr->dev_attr.attr; attr = NULL; } pmc->block[blk_num].attr_counter = devm_kcalloc( dev, pmc->block[blk_num].counters, sizeof(struct mlxbf_pmc_attribute), GFP_KERNEL); if (!pmc->block[blk_num].attr_counter) return -ENOMEM; pmc->block[blk_num].attr_event = devm_kcalloc( dev, pmc->block[blk_num].counters, sizeof(struct mlxbf_pmc_attribute), GFP_KERNEL); if (!pmc->block[blk_num].attr_event) return -ENOMEM; /* "eventX" and "counterX" sysfs to program and read counter values */ for (j = 0; j < pmc->block[blk_num].counters; ++j) { attr = &pmc->block[blk_num].attr_counter[j]; attr->dev_attr.attr.mode = 0644; attr->dev_attr.show = mlxbf_pmc_counter_show; attr->dev_attr.store = mlxbf_pmc_counter_store; attr->index = j; attr->nr = blk_num; attr->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL, "counter%d", j); pmc->block[blk_num].block_attr[++i] = &attr->dev_attr.attr; attr = NULL; attr = &pmc->block[blk_num].attr_event[j]; attr->dev_attr.attr.mode = 0644; attr->dev_attr.show = mlxbf_pmc_event_show; attr->dev_attr.store = mlxbf_pmc_event_store; attr->index = j; attr->nr = blk_num; attr->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL, "event%d", j); pmc->block[blk_num].block_attr[++i] = &attr->dev_attr.attr; attr = NULL; } return 0; } /* Populate attributes for blocks with registers to monitor performance */ static int mlxbf_pmc_init_perftype_reg(struct device *dev, int blk_num) { struct mlxbf_pmc_attribute *attr; const struct mlxbf_pmc_events *events; int i = 0, j = 0; events = mlxbf_pmc_event_list(pmc->block_name[blk_num], &j); if (!events) return -EINVAL; pmc->block[blk_num].attr_event = devm_kcalloc( dev, j, sizeof(struct mlxbf_pmc_attribute), GFP_KERNEL); if (!pmc->block[blk_num].attr_event) return -ENOMEM; while (j > 0) { --j; attr = &pmc->block[blk_num].attr_event[j]; attr->dev_attr.attr.mode = 0644; attr->dev_attr.show = mlxbf_pmc_counter_show; attr->dev_attr.store = mlxbf_pmc_counter_store; attr->nr = blk_num; attr->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL, events[j].evt_name); pmc->block[blk_num].block_attr[i] = &attr->dev_attr.attr; attr = NULL; i++; } return 0; } /* Helper to create the bfperf sysfs sub-directories and files */ static int mlxbf_pmc_create_groups(struct device *dev, int blk_num) { int err; /* Populate attributes based on counter type */ if (pmc->block[blk_num].type == MLXBF_PMC_TYPE_COUNTER) err = mlxbf_pmc_init_perftype_counter(dev, blk_num); else if (pmc->block[blk_num].type == MLXBF_PMC_TYPE_REGISTER) err = mlxbf_pmc_init_perftype_reg(dev, blk_num); else err = -EINVAL; if (err) return err; /* Add a new attribute_group for the block */ pmc->block[blk_num].block_attr_grp.attrs = pmc->block[blk_num].block_attr; pmc->block[blk_num].block_attr_grp.name = devm_kasprintf( dev, GFP_KERNEL, pmc->block_name[blk_num]); pmc->groups[blk_num] = &pmc->block[blk_num].block_attr_grp; return 0; } static bool mlxbf_pmc_guid_match(const guid_t *guid, const struct arm_smccc_res *res) { guid_t id = GUID_INIT(res->a0, res->a1, res->a1 >> 16, res->a2, res->a2 >> 8, res->a2 >> 16, res->a2 >> 24, res->a3, res->a3 >> 8, res->a3 >> 16, res->a3 >> 24); return guid_equal(guid, &id); } /* Helper to map the Performance Counters from the varios blocks */ static int mlxbf_pmc_map_counters(struct device *dev) { uint64_t info[MLXBF_PMC_INFO_SZ]; int i, tile_num, ret; for (i = 0; i < pmc->total_blocks; ++i) { if (strstr(pmc->block_name[i], "tile")) { ret = sscanf(pmc->block_name[i], "tile%d", &tile_num); if (ret < 0) return ret; if (tile_num >= pmc->tile_count) continue; } ret = device_property_read_u64_array(dev, pmc->block_name[i], info, MLXBF_PMC_INFO_SZ); if (ret) return ret; /* * Do not remap if the proper SMC calls are supported, * since the SMC calls expect physical addresses. */ if (pmc->svc_sreg_support) pmc->block[i].mmio_base = (void __iomem *)info[0]; else pmc->block[i].mmio_base = devm_ioremap(dev, info[0], info[1]); pmc->block[i].blk_size = info[1]; pmc->block[i].counters = info[2]; pmc->block[i].type = info[3]; if (!pmc->block[i].mmio_base) return -ENOMEM; ret = mlxbf_pmc_create_groups(dev, i); if (ret) return ret; } return 0; } static int mlxbf_pmc_probe(struct platform_device *pdev) { struct acpi_device *acpi_dev = ACPI_COMPANION(&pdev->dev); const char *hid = acpi_device_hid(acpi_dev); struct device *dev = &pdev->dev; struct arm_smccc_res res; guid_t guid; int ret; /* Ensure we have the UUID we expect for this service. */ arm_smccc_smc(MLXBF_PMC_SIP_SVC_UID, 0, 0, 0, 0, 0, 0, 0, &res); guid_parse(mlxbf_pmc_svc_uuid_str, &guid); if (!mlxbf_pmc_guid_match(&guid, &res)) return -ENODEV; pmc = devm_kzalloc(dev, sizeof(struct mlxbf_pmc_context), GFP_KERNEL); if (!pmc) return -ENOMEM; /* * ACPI indicates whether we use SMCs to access registers or not. * If sreg_tbl_perf is not present, just assume we're not using SMCs. */ ret = device_property_read_u32(dev, "sec_reg_block", &pmc->sreg_tbl_perf); if (ret) { pmc->svc_sreg_support = false; } else { /* * Check service version to see if we actually do support the * needed SMCs. If we have the calls we need, mark support for * them in the pmc struct. */ arm_smccc_smc(MLXBF_PMC_SIP_SVC_VERSION, 0, 0, 0, 0, 0, 0, 0, &res); if (res.a0 == MLXBF_PMC_SVC_REQ_MAJOR && res.a1 >= MLXBF_PMC_SVC_MIN_MINOR) pmc->svc_sreg_support = true; else return -EINVAL; } if (!strcmp(hid, "MLNXBFD0")) pmc->event_set = MLXBF_PMC_EVENT_SET_BF1; else if (!strcmp(hid, "MLNXBFD1")) pmc->event_set = MLXBF_PMC_EVENT_SET_BF2; else return -ENODEV; ret = device_property_read_u32(dev, "block_num", &pmc->total_blocks); if (ret) return ret; ret = device_property_read_string_array(dev, "block_name", pmc->block_name, pmc->total_blocks); if (ret != pmc->total_blocks) return -EFAULT; ret = device_property_read_u32(dev, "tile_num", &pmc->tile_count); if (ret) return ret; pmc->pdev = pdev; ret = mlxbf_pmc_map_counters(dev); if (ret) return ret; pmc->hwmon_dev = devm_hwmon_device_register_with_groups( dev, "bfperf", pmc, pmc->groups); platform_set_drvdata(pdev, pmc); return 0; } static const struct acpi_device_id mlxbf_pmc_acpi_ids[] = { { "MLNXBFD0", 0 }, { "MLNXBFD1", 0 }, {}, }; MODULE_DEVICE_TABLE(acpi, mlxbf_pmc_acpi_ids); static struct platform_driver pmc_driver = { .driver = { .name = "mlxbf-pmc", .acpi_match_table = ACPI_PTR(mlxbf_pmc_acpi_ids), }, .probe = mlxbf_pmc_probe, }; module_platform_driver(pmc_driver); MODULE_AUTHOR("Shravan Kumar Ramani <sramani@mellanox.com>"); MODULE_DESCRIPTION("Mellanox PMC driver"); MODULE_LICENSE("Dual BSD/GPL");
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