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SubjectRe: [PATCH 4/4] scsi: hisi_sas: Add support for DIF/DIX feature for v3 hw
Hi Xiang,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on mkp-scsi/for-next]
[also build test WARNING on next-20181123]
[cannot apply to v4.20-rc3]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/John-Garry/hisi_sas-DIF-DIX-support/20181123-202805
base: https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next
config: x86_64-allmodconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All warnings (new ones prefixed by >>):

drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:26: warning: cast from restricted __le64
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:26: warning: incorrect type in argument 1 (different base types)
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:26: expected unsigned long long [unsigned] [usertype] val
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:26: got restricted __le64 [usertype] sas_addr
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:26: warning: cast from restricted __le64
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:26: warning: cast from restricted __le64
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:26: warning: cast from restricted __le64
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:26: warning: cast from restricted __le64
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:26: warning: cast from restricted __le64
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:26: warning: cast from restricted __le64
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:26: warning: cast from restricted __le64
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:26: warning: cast from restricted __le64
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:24: warning: incorrect type in assignment (different base types)
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:24: expected restricted __le64 [usertype] sas_addr
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:694:24: got unsigned long long
>> drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1165:26: warning: invalid assignment: |=
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1165:26: left side has type restricted __le32
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1165:26: right side has type int
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1166:26: warning: invalid assignment: |=
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1166:26: left side has type restricted __le32
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1166:26: right side has type int
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1759:37: warning: incorrect type in initializer (different base types)
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1759:37: expected unsigned int [unsigned] [usertype] dma_rx_err_type
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1759:37: got restricted __le32 [usertype] dma_rx_err_type
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1760:40: warning: incorrect type in initializer (different base types)
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1760:40: expected unsigned int [unsigned] [usertype] trans_tx_fail_type
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1760:40: got restricted __le32 [usertype] trans_tx_fail_type
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1767:40: warning: restricted __le32 degrades to integer
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1781:40: warning: restricted __le32 degrades to integer
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1840:30: warning: restricted __le32 degrades to integer
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1864:26: warning: restricted __le32 degrades to integer
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:1976:37: warning: restricted __le32 degrades to integer
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:2372:25: warning: symbol 'host_attrs_v3_hw' was not declared. Should it be static?
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:2858:22: warning: incorrect type in assignment (different base types)
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:2858:22: expected unsigned int [unsigned] [usertype] device_state
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:2858:22: got restricted pci_power_t
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:2863:35: warning: incorrect type in argument 2 (different base types)
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:2863:35: expected restricted pci_power_t [usertype] state
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:2863:35: got unsigned int [unsigned] [usertype] device_state
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:2878:32: warning: incorrect type in initializer (different base types)
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:2878:32: expected unsigned int [unsigned] [usertype] device_state
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c:2878:32: got restricted pci_power_t [usertype] current_state

vim +1165 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c

1072
1073 static void prep_ssp_v3_hw(struct hisi_hba *hisi_hba,
1074 struct hisi_sas_slot *slot)
1075 {
1076 struct sas_task *task = slot->task;
1077 struct hisi_sas_cmd_hdr *hdr = slot->cmd_hdr;
1078 struct domain_device *device = task->dev;
1079 struct hisi_sas_device *sas_dev = device->lldd_dev;
1080 struct hisi_sas_port *port = slot->port;
1081 struct sas_ssp_task *ssp_task = &task->ssp_task;
1082 struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
1083 struct hisi_sas_tmf_task *tmf = slot->tmf;
1084 int has_data = 0, priority = !!tmf;
1085 u8 *buf_cmd;
1086 u32 dw1 = 0, dw2 = 0, len = 0;
1087
1088 hdr->dw0 = cpu_to_le32((1 << CMD_HDR_RESP_REPORT_OFF) |
1089 (2 << CMD_HDR_TLR_CTRL_OFF) |
1090 (port->id << CMD_HDR_PORT_OFF) |
1091 (priority << CMD_HDR_PRIORITY_OFF) |
1092 (1 << CMD_HDR_CMD_OFF)); /* ssp */
1093
1094 dw1 = 1 << CMD_HDR_VDTL_OFF;
1095 if (tmf) {
1096 dw1 |= 2 << CMD_HDR_FRAME_TYPE_OFF;
1097 dw1 |= DIR_NO_DATA << CMD_HDR_DIR_OFF;
1098 } else {
1099 dw1 |= 1 << CMD_HDR_FRAME_TYPE_OFF;
1100 switch (scsi_cmnd->sc_data_direction) {
1101 case DMA_TO_DEVICE:
1102 has_data = 1;
1103 dw1 |= DIR_TO_DEVICE << CMD_HDR_DIR_OFF;
1104 break;
1105 case DMA_FROM_DEVICE:
1106 has_data = 1;
1107 dw1 |= DIR_TO_INI << CMD_HDR_DIR_OFF;
1108 break;
1109 default:
1110 dw1 &= ~CMD_HDR_DIR_MSK;
1111 }
1112 }
1113
1114 /* map itct entry */
1115 dw1 |= sas_dev->device_id << CMD_HDR_DEV_ID_OFF;
1116 hdr->dw1 = cpu_to_le32(dw1);
1117
1118 dw2 = (((sizeof(struct ssp_command_iu) + sizeof(struct ssp_frame_hdr)
1119 + 3) / 4) << CMD_HDR_CFL_OFF) |
1120 ((HISI_SAS_MAX_SSP_RESP_SZ / 4) << CMD_HDR_MRFL_OFF) |
1121 (2 << CMD_HDR_SG_MOD_OFF);
1122 hdr->dw2 = cpu_to_le32(dw2);
1123 hdr->transfer_tags = cpu_to_le32(slot->idx);
1124
1125 if (has_data) {
1126 prep_prd_sge_v3_hw(hisi_hba, slot, hdr, task->scatter,
1127 slot->n_elem);
1128
1129 if (scsi_prot_sg_count(scsi_cmnd))
1130 prep_prd_sge_dif_v3_hw(hisi_hba, slot, hdr,
1131 scsi_prot_sglist(scsi_cmnd),
1132 slot->n_elem_dif);
1133 }
1134
1135 hdr->cmd_table_addr = cpu_to_le64(hisi_sas_cmd_hdr_addr_dma(slot));
1136 hdr->sts_buffer_addr = cpu_to_le64(hisi_sas_status_buf_addr_dma(slot));
1137
1138 buf_cmd = hisi_sas_cmd_hdr_addr_mem(slot) +
1139 sizeof(struct ssp_frame_hdr);
1140
1141 memcpy(buf_cmd, &task->ssp_task.LUN, 8);
1142 if (!tmf) {
1143 buf_cmd[9] = ssp_task->task_attr | (ssp_task->task_prio << 3);
1144 memcpy(buf_cmd + 12, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
1145 } else {
1146 buf_cmd[10] = tmf->tmf;
1147 switch (tmf->tmf) {
1148 case TMF_ABORT_TASK:
1149 case TMF_QUERY_TASK:
1150 buf_cmd[12] =
1151 (tmf->tag_of_task_to_be_managed >> 8) & 0xff;
1152 buf_cmd[13] =
1153 tmf->tag_of_task_to_be_managed & 0xff;
1154 break;
1155 default:
1156 break;
1157 }
1158 }
1159
1160 if (has_data && !scsi_prot_op_normal(scsi_cmnd)) {
1161 struct hisi_sas_protect_iu_v3_hw prot;
1162 unsigned char prot_op = scsi_get_prot_op(scsi_cmnd);
1163 u8 *buf_cmd_prot;
1164
> 1165 hdr->dw7 |= 1 << CMD_HDR_ADDR_MODE_SEL_OFF;
1166 hdr->dw1 |= CMD_HDR_PIR_MSK;
1167 buf_cmd_prot = hisi_sas_cmd_hdr_addr_mem(slot) +
1168 sizeof(struct ssp_frame_hdr) +
1169 sizeof(struct ssp_command_iu);
1170
1171 memset(&prot, 0, sizeof(struct hisi_sas_protect_iu_v3_hw));
1172 fill_prot_v3_hw(scsi_cmnd, &prot);
1173 memcpy(buf_cmd_prot, &prot,
1174 sizeof(struct hisi_sas_protect_iu_v3_hw));
1175
1176 if ((prot_op == SCSI_PROT_READ_INSERT) ||
1177 (prot_op == SCSI_PROT_WRITE_INSERT) ||
1178 (prot_op == SCSI_PROT_WRITE_PASS) ||
1179 (prot_op == SCSI_PROT_READ_PASS)) {
1180 unsigned int interval = scsi_prot_interval(scsi_cmnd);
1181 unsigned int ilog2_interval = ilog2(interval);
1182
1183 len = (task->total_xfer_len >> ilog2_interval) * 8;
1184 }
1185 }
1186
1187 hdr->data_transfer_len = cpu_to_le32(task->total_xfer_len + len);
1188 }
1189

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