Commit 2e222779 authored by Uma Krishnan's avatar Uma Krishnan Committed by Martin K. Petersen
Browse files

scsi: cxlflash: Setup function acTag range 



The OCXL specification supports distributing acTags amongst different AFUs and
functions on the link. The platform-specific acTag range for the link is
obtained using the OCXL provider services and then assigned to the host
function based on implementation.

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 e9dfceda

drivers/scsi/cxlflash/ocxl_hw.c

+15 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ static int ocxlflash_config_fn(struct pci_dev *pdev, struct ocxl_hw_afu *afu) 
{

	struct ocxl_fn_config *fcfg = &afu->fcfg;

	struct device *dev = &pdev->dev;

	u16 base, enabled, supported;

	int rc = 0;



	/* Read DVSEC config of the function */
@@ -59,6 +60,20 @@ static int ocxlflash_config_fn(struct pci_dev *pdev, struct ocxl_hw_afu *afu) 
			dev_warn(dev, "%s: Unexpected AFU index value %d\n",

				 __func__, fcfg->max_afu_index);

	}



	rc = ocxl_config_get_actag_info(pdev, &base, &enabled, &supported);

	if (unlikely(rc)) {

		dev_err(dev, "%s: ocxl_config_get_actag_info failed rc=%d\n",

			__func__, rc);

		goto out;

	}



	afu->fn_actag_base = base;

	afu->fn_actag_enabled = enabled;



	ocxl_config_set_actag(pdev, fcfg->dvsec_function_pos, base, enabled);

	dev_dbg(dev, "%s: Function acTag range base=%u enabled=%u\n",

		__func__, base, enabled);

out:

	return rc;

}

drivers/scsi/cxlflash/ocxl_hw.h

+3 −0
Original line number Diff line number Diff line
@@ -19,5 +19,8 @@ struct ocxl_hw_afu { 


	struct ocxl_fn_config fcfg;	/* DVSEC config of the function */



	int fn_actag_base;		/* Function acTag base */

	int fn_actag_enabled;		/* Function acTag number enabled */



	bool is_present;		/* Function has AFUs defined */

};

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