[PATCH v5 05/21] ibmvfc: define hcall wrapper for registering a Sub-CRQ
From: Tyrel Datwyler <tyreld@linux.ibm.com>
Date: 2021-01-14 20:34:14
Also in:
linux-scsi, lkml
Subsystem:
ibm power virtual fc device drivers, linux for powerpc (32-bit and 64-bit), scsi subsystem, the rest · Maintainers:
Tyrel Datwyler, Madhavan Srinivasan, "James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
Sub-CRQs are registred with firmware via a hypercall. Abstract that interface into a simpler helper function. Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com> Reviewed-by: Brian King <redacted> --- 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 524e81164d70..612c7f3d7bd3 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);
--
2.27.0