Commit d926519e authored by Uma Krishnan's avatar Uma Krishnan Committed by Martin K. Petersen
Browse files

scsi: cxlflash: Setup AFU acTag range 



The OCXL specification supports distributing acTags amongst different AFUs and
functions on the link. As cxlflash devices are expected to only support a
single AFU per function, the entire range that was assigned to the function is
also assigned to the AFU.

Signed-off-by: default avatarUma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: default avatarMatthew R. Ochs <mrochs@linux.vnet.ibm.com>
Reviewed-by: default avatarAndrew Donnellan <andrew.donnellan@au1.ibm.com>
Reviewed-by: default avatarFrederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 9cc84291

drivers/scsi/cxlflash/ocxl_hw.c

+13 −0
Original line number Diff line number Diff line
@@ -92,6 +92,9 @@ static int ocxlflash_config_afu(struct pci_dev *pdev, struct ocxl_hw_afu *afu) 
	struct ocxl_afu_config *acfg = &afu->acfg;

	struct ocxl_fn_config *fcfg = &afu->fcfg;

	struct device *dev = &pdev->dev;

	int count;

	int base;

	int pos;

	int rc = 0;



	/* This HW AFU function does not have any AFUs defined */
@@ -105,6 +108,16 @@ static int ocxlflash_config_afu(struct pci_dev *pdev, struct ocxl_hw_afu *afu) 
			__func__, rc);

		goto out;

	}



	/* Only one AFU per function is supported, so actag_base is same */

	base = afu->fn_actag_base;

	count = min_t(int, acfg->actag_supported, afu->fn_actag_enabled);

	pos = acfg->dvsec_afu_control_pos;



	ocxl_config_set_afu_actag(pdev, pos, base, count);

	dev_dbg(dev, "%s: acTag base=%d enabled=%d\n", __func__, base, count);

	afu->afu_actag_base = base;

	afu->afu_actag_enabled = count;

out:

	return rc;

}

drivers/scsi/cxlflash/ocxl_hw.h

+2 −0
Original line number Diff line number Diff line
@@ -22,6 +22,8 @@ struct ocxl_hw_afu { 


	int fn_actag_base;		/* Function acTag base */

	int fn_actag_enabled;		/* Function acTag number enabled */

	int afu_actag_base;		/* AFU acTag base */

	int afu_actag_enabled;		/* AFU acTag number enabled */



	bool is_present;		/* Function has AFUs defined */

};

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