1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* 3 * Copyright (c) 2026 zhenwei pi <zhenwei.pi@linux.dev> 4 */ 5 6 #include <rdma/ib_pma.h> 7 #include "rxe.h" 8 #include "rxe_hw_counters.h" 9 10 static int rxe_get_pma_info(struct ib_mad *out) 11 { 12 struct ib_class_port_info cpi = {}; 13 14 cpi.capability_mask = IB_PMA_CLASS_CAP_EXT_WIDTH; 15 memcpy((out->data + 40), &cpi, sizeof(cpi)); 16 17 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 18 } 19 20 static int rxe_get_pma_counters(struct rxe_dev *rxe, struct ib_mad *out) 21 { 22 struct ib_pma_portcounters *pma_cnt = (struct ib_pma_portcounters *)(out->data + 40); 23 s64 val; 24 25 /* IBA release 1.8, 16.1.3.5: During operation, instead of overflowing, they shall stop 26 * at all ones. 27 */ 28 val = atomic64_read(&rxe->stats_counters[RXE_CNT_LINK_DOWNED]); 29 pma_cnt->link_downed_counter = clamp(val, 0, U8_MAX); 30 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 31 } 32 33 static int rxe_get_pma_counters_ext(struct rxe_dev *rxe, struct ib_mad *out) 34 { 35 struct ib_pma_portcounters_ext *pma_cnt_ext = 36 (struct ib_pma_portcounters_ext *)(out->data + 40); 37 s64 val; 38 39 val = atomic64_read(&rxe->stats_counters[RXE_CNT_SENT_BYTES]); 40 pma_cnt_ext->port_xmit_data = cpu_to_be64(val >> 2); 41 42 val = atomic64_read(&rxe->stats_counters[RXE_CNT_RCVD_BYTES]); 43 pma_cnt_ext->port_rcv_data = cpu_to_be64(val >> 2); 44 45 val = atomic64_read(&rxe->stats_counters[RXE_CNT_SENT_PKTS]); 46 pma_cnt_ext->port_xmit_packets = cpu_to_be64(val); 47 48 val = atomic64_read(&rxe->stats_counters[RXE_CNT_RCVD_PKTS]); 49 pma_cnt_ext->port_rcv_packets = cpu_to_be64(val); 50 51 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 52 } 53 54 static int rxe_get_perf_mgmt(struct rxe_dev *rxe, const struct ib_mad *in, struct ib_mad *out) 55 { 56 switch (in->mad_hdr.attr_id) { 57 case IB_PMA_CLASS_PORT_INFO: 58 return rxe_get_pma_info(out); 59 60 case IB_PMA_PORT_COUNTERS: 61 return rxe_get_pma_counters(rxe, out); 62 63 case IB_PMA_PORT_COUNTERS_EXT: 64 return rxe_get_pma_counters_ext(rxe, out); 65 66 default: 67 out->mad_hdr.status = cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB); 68 return IB_MAD_RESULT_SUCCESS; 69 } 70 } 71 72 int rxe_process_mad(struct ib_device *ibdev, int mad_flags, u32 port_num, 73 const struct ib_wc *in_wc, const struct ib_grh *in_grh, 74 const struct ib_mad *in, struct ib_mad *out, 75 size_t *out_mad_size, u16 *out_mad_pkey_index) 76 { 77 struct rxe_dev *rxe = to_rdev(ibdev); 78 u8 mgmt_class = in->mad_hdr.mgmt_class; 79 u8 method = in->mad_hdr.method; 80 81 if (port_num != 1) 82 return IB_MAD_RESULT_FAILURE; 83 84 memset(out, 0, sizeof(*out)); 85 switch (mgmt_class) { 86 case IB_MGMT_CLASS_PERF_MGMT: 87 if (method == IB_MGMT_METHOD_GET) 88 return rxe_get_perf_mgmt(rxe, in, out); 89 break; 90 91 default: 92 out->mad_hdr.status = cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD); 93 return IB_MAD_RESULT_SUCCESS; 94 } 95 96 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY; 97 } 98