drivers/scsi/libsas/sas_task.c

Source file repositories/reference/linux-study-clean/drivers/scsi/libsas/sas_task.c

File Facts

System
Linux kernel
Corpus path
drivers/scsi/libsas/sas_task.c
Extension
.c
Size
1188 bytes
Lines
43
Domain
Driver Families
Bucket
drivers/scsi
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only

#include "sas_internal.h"

#include <linux/kernel.h>
#include <linux/export.h>
#include <scsi/sas.h>
#include <scsi/libsas.h>

/* fill task_status_struct based on SSP response frame */
void sas_ssp_task_response(struct device *dev, struct sas_task *task,
			   struct ssp_response_iu *iu)
{
	struct task_status_struct *tstat = &task->task_status;

	tstat->resp = SAS_TASK_COMPLETE;

	switch (iu->datapres) {
	case SAS_DATAPRES_NO_DATA:
		tstat->stat = iu->status;
		break;
	case SAS_DATAPRES_RESPONSE_DATA:
		tstat->stat = iu->resp_data[3];
		break;
	case SAS_DATAPRES_SENSE_DATA:
		tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
		tstat->buf_valid_size =
			min_t(int, SAS_STATUS_BUF_SIZE,
			      be32_to_cpu(iu->sense_data_len));
		memcpy(tstat->buf, iu->sense_data, tstat->buf_valid_size);

		if (iu->status != SAM_STAT_CHECK_CONDITION)
			dev_warn(dev, "dev %016llx sent sense data, but stat(0x%x) is not CHECK CONDITION\n",
				 SAS_ADDR(task->dev->sas_addr), iu->status);
		break;
	default:
		/* when datapres contains corrupt/unknown value... */
		tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
	}
}
EXPORT_SYMBOL_GPL(sas_ssp_task_response);

Annotation

Implementation Notes