From 9e6b6b81aafaf6e6d6d8f22e87b2cd9f2ffd66e8 Mon Sep 17 00:00:00 2001
From: Tyrel Datwyler <tyreld@linux.ibm.com>
Date: Thu, 14 Jan 2021 14:31:32 -0600
Subject: [PATCH] scsi: ibmvfc: Define hcall wrapper for registering a Sub-CRQ
References: jsc#SLE-15442 bsc#1180814 ltc#187461
Patch-mainline: v5.12-rc1
Git-commit: 9e6b6b81aafaf6e6d6d8f22e87b2cd9f2ffd66e8
Sub-CRQs are registred with firmware via a hypercall. Abstract that
interface into a simpler helper function.
Link: https://lore.kernel.org/r/20210114203148.246656-6-tyreld@linux.ibm.com
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
drivers/scsi/ibmvscsi/ibmvfc.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 81491da51f8b..c31a1c4791d5 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -138,6 +138,20 @@ static void ibmvfc_tgt_move_login(struct ibmvfc_target *);
static const char *unknown_error = "unknown error";
+static long h_reg_sub_crq(unsigned long unit_address, unsigned long ioba,
+ unsigned long length, unsigned long *cookie,
+ unsigned long *irq)
+{
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+ long rc;
+
+ rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, ioba, length);
+ *cookie = retbuf[0];
+ *irq = retbuf[1];
+
+ return rc;
+}
+
static int ibmvfc_check_caps(struct ibmvfc_host *vhost, unsigned long cap_flags)
{
u64 host_caps = be64_to_cpu(vhost->login_buf->resp.capabilities);
--
2.26.2