Hi, On 10/8/20 2:37 PM, Shravan Kumar Ramani wrote: > The performance modules in BlueField are present in several hardware > blocks and each block provides access to these stats either through > counters that can be programmed to monitor supported events or > through memory-mapped registers that hold the relevant information. > The hardware blocks that include a performance module are: > * Tile (block containing 2 cores and a shared L2 cache) > * TRIO (PCIe root complex) > * MSS (Memory Sub-system containing the Memory Controller and L3 cache) > * GIC (Interrupt controller) > * SMMU (System Memory Management Unit) > The mlx_pmc driver provides access to all of these performance modules > through a hwmon sysfs interface. Thank you for your patch, I've applied this patch to my review-hans branch: https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans Note it will show up there once I've pushed my local branch there, which might take a while. Once I've run some tests on this branch the patches there will be added to the platform-drivers-x86/for-next branch and eventually will be included in the pdx86 pull-request to Linus for the next merge-window. Regards, Hans > > v2 --> v3 > Update copyright info. > > v1 --> v2 > Remove unused headers. > Add comma to arrays where last line is not a termination. > Use kstrtoint in place of sscanf. > UUID manipulation follows drivers/platform/mellanox/mlxbf-bootctl.c > > Signed-off-by: Shravan Kumar Ramani <shravankr@xxxxxxxxxx> > Reviewed-by: Vadim Pasternak <vadimp@xxxxxxxxxx> > Reviewed-by: Jiri Pirko <jiri@xxxxxxxxxx> > --- > drivers/platform/mellanox/Kconfig | 10 + > drivers/platform/mellanox/Makefile | 1 + > drivers/platform/mellanox/mlxbf-pmc.c | 1478 +++++++++++++++++++++++++++++++++ > 3 files changed, 1489 insertions(+) > create mode 100644 drivers/platform/mellanox/mlxbf-pmc.c > > diff --git a/drivers/platform/mellanox/Kconfig b/drivers/platform/mellanox/Kconfig > index 916b39d..edd17e1 100644 > --- a/drivers/platform/mellanox/Kconfig > +++ b/drivers/platform/mellanox/Kconfig > @@ -56,4 +56,14 @@ config MLXBF_BOOTCTL > to the userspace tools, to be used in conjunction with the eMMC > device driver to do necessary initial swap of the boot partition. > > +config MLXBF_PMC > + tristate "Mellanox BlueField Performance Monitoring Counters driver" > + depends on ARM64 > + depends on HWMON > + depends on ACPI > + help > + Say y here to enable PMC support. The PMC driver provides access > + to performance monitoring counters within various blocks in the > + Mellanox BlueField SoC via a sysfs interface. > + > endif # MELLANOX_PLATFORM > diff --git a/drivers/platform/mellanox/Makefile b/drivers/platform/mellanox/Makefile > index 499623c..000ddaa 100644 > --- a/drivers/platform/mellanox/Makefile > +++ b/drivers/platform/mellanox/Makefile > @@ -4,6 +4,7 @@ > # Mellanox Platform-Specific Drivers > # > obj-$(CONFIG_MLXBF_BOOTCTL) += mlxbf-bootctl.o > +obj-$(CONFIG_MLXBF_PMC) += mlxbf-pmc.o > obj-$(CONFIG_MLXBF_TMFIFO) += mlxbf-tmfifo.o > obj-$(CONFIG_MLXREG_HOTPLUG) += mlxreg-hotplug.o > obj-$(CONFIG_MLXREG_IO) += mlxreg-io.o > diff --git a/drivers/platform/mellanox/mlxbf-pmc.c b/drivers/platform/mellanox/mlxbf-pmc.c > new file mode 100644 > index 0000000..3588398 > --- /dev/null > +++ b/drivers/platform/mellanox/mlxbf-pmc.c > @@ -0,0 +1,1478 @@ > +// 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) > + > +/** > + * 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; > +}; > + > +/** > + * 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 > + * @blcok_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; > +}; > + > +/** > + * 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 > + * @sv_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; > +}; > + > +/** > + * 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_S_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 (IS_ERR(pmc->block[i].mmio_base)) > + return PTR_ERR(pmc->block[i].mmio_base); > + > + 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@xxxxxxxxxxxx>"); > +MODULE_DESCRIPTION("Mellanox PMC driver"); > +MODULE_LICENSE("Dual BSD/GPL"); >
