scsi: cxlflash: Setup AFU PASID (41df40d8) · Commits · 戴 / test

Per the OCXL specification, the maximum PASID supported by the AFU is indicated by a field within the configuration space. Similar to acTags, implementations can choose to use any sub-range of PASID within their assigned range. For cxlflash, the entire range is used. Signed-off-by:

Uma Krishnan <ukrishn@linux.vnet.ibm.com> Acked-by:

Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Reviewed-by:

Andrew Donnellan <andrew.donnellan@au1.ibm.com> Reviewed-by:

Frederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by:

Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/cxlflash/ocxl_hw.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -118,6 +118,9 @@ static int ocxlflash_config_afu(struct pci_dev pdev, struct ocxl_hw_afu afu)
		dev_dbg(dev, "%s: acTag base=%d enabled=%d\n", __func__, base, count);
		afu->afu_actag_base = base;
		afu->afu_actag_enabled = count;
		afu->max_pasid = 1 << acfg->pasid_supported_log;

		ocxl_config_set_afu_pasid(pdev, pos, 0, acfg->pasid_supported_log);
		out:
		return rc;
		}

drivers/scsi/cxlflash/ocxl_hw.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -25,5 +25,6 @@ struct ocxl_hw_afu {
		int afu_actag_base; /* AFU acTag base */
		int afu_actag_enabled; /* AFU acTag number enabled */

		int max_pasid; /* Maximum number of contexts */
		bool is_present; /* Function has AFUs defined */
		};

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