+/* megasas_get_target_prop - Send DCMD with below details to firmware.
+ *
+ * This DCMD will fetch few properties of LD/system PD defined
+ * in MR_TARGET_DEV_PROPERTIES. eg. Queue Depth, MDTS value.
+ *
+ * DCMD send by drivers whenever new target is added to the OS.
+ *
+ * dcmd.opcode - MR_DCMD_DEV_GET_TARGET_PROP
+ * dcmd.mbox.b[0] - DCMD is to be fired for LD or system PD.
+ * 0 = system PD, 1 = LD.
+ * dcmd.mbox.s[1] - TargetID for LD/system PD.
+ * dcmd.sge IN - Pointer to return MR_TARGET_DEV_PROPERTIES.
+ *
+ * @instance: Adapter soft state
+ * @sdev: OS provided scsi device
+ *
+ * Returns 0 on success non-zero on failure.
+ */
+static int
+megasas_get_target_prop(struct megasas_instance *instance,
+ struct scsi_device *sdev)
+{
+ int ret;
+ struct megasas_cmd *cmd;
+ struct megasas_dcmd_frame *dcmd;
+ u16 targetId = (sdev->channel % 2) + sdev->id;
+
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd) {
+ dev_err(&instance->pdev->dev,
+ "Failed to get cmd %s\n", __func__);
+ return -ENOMEM;
+ }
+
+ dcmd = &cmd->frame->dcmd;
+
+ memset(instance->tgt_prop, 0, sizeof(*instance->tgt_prop));
+ memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
+ dcmd->mbox.b[0] = MEGASAS_IS_LOGICAL(sdev);
+
+ dcmd->mbox.s[1] = cpu_to_le16(targetId);
+ dcmd->cmd = MFI_CMD_DCMD;
+ dcmd->cmd_status = 0xFF;
+ dcmd->sge_count = 1;
+ dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
+ dcmd->timeout = 0;
+ dcmd->pad_0 = 0;
+ dcmd->data_xfer_len =
+ cpu_to_le32(sizeof(struct MR_TARGET_PROPERTIES));
+ dcmd->opcode = cpu_to_le32(MR_DCMD_DRV_GET_TARGET_PROP);
+ dcmd->sgl.sge32[0].phys_addr =
+ cpu_to_le32(instance->tgt_prop_h);
+ dcmd->sgl.sge32[0].length =
+ cpu_to_le32(sizeof(struct MR_TARGET_PROPERTIES));
+
+ if (instance->ctrl_context && !instance->mask_interrupts)
+ ret = megasas_issue_blocked_cmd(instance,
+ cmd, MFI_IO_TIMEOUT_SECS);
+ else
+ ret = megasas_issue_polled(instance, cmd);
+
+ switch (ret) {
+ case DCMD_TIMEOUT:
+ switch (dcmd_timeout_ocr_possible(instance)) {
+ case INITIATE_OCR:
+ cmd->flags |= DRV_DCMD_SKIP_REFIRE;
+ megasas_reset_fusion(instance->host,
+ MFI_IO_TIMEOUT_OCR);
+ break;
+ case KILL_ADAPTER:
+ megaraid_sas_kill_hba(instance);
+ break;
+ case IGNORE_TIMEOUT:
+ dev_info(&instance->pdev->dev,
+ "Ignore DCMD timeout: %s %d\n",
+ __func__, __LINE__);
+ break;
+ }
+ break;
+
+ default:
+ megasas_return_cmd(instance, cmd);
+ }
+ if (ret != DCMD_SUCCESS)
+ dev_err(&instance->pdev->dev,
+ "return from %s %d return value %d\n",
+ __func__, __LINE__, ret);
+
+ return ret;
+}
+