From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:51516 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728049AbgBTMB5 (ORCPT ); Thu, 20 Feb 2020 07:01:57 -0500 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 01KC1Pjx061336 for ; Thu, 20 Feb 2020 07:01:55 -0500 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0b-001b2d01.pphosted.com with ESMTP id 2y8xdpqaqh-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 20 Feb 2020 07:01:44 -0500 Received: from localhost by e06smtp04.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 20 Feb 2020 12:00:52 -0000 From: Pierre Morel Subject: [kvm-unit-tests PATCH v5 10/10] s390x: css: ping pong Date: Thu, 20 Feb 2020 13:00:43 +0100 In-Reply-To: <1582200043-21760-1-git-send-email-pmorel@linux.ibm.com> References: <1582200043-21760-1-git-send-email-pmorel@linux.ibm.com> Message-Id: <1582200043-21760-11-git-send-email-pmorel@linux.ibm.com> Sender: linux-s390-owner@vger.kernel.org List-ID: To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com To test a write command with the SSCH instruction we need a QEMU device, with control unit type 0xC0CA. The PONG device is such a device. This type of device responds to PONG_WRITE requests by incrementing an integer, stored as a string at offset 0 of the CCW data. Signed-off-by: Pierre Morel --- s390x/css.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/s390x/css.c b/s390x/css.c index b9805a9..c1616d4 100644 --- a/s390x/css.c +++ b/s390x/css.c @@ -25,6 +25,12 @@ #define PSW_PRG_MASK (PSW_MASK_IO | PSW_MASK_EA | PSW_MASK_BA) #define PONG_CU_TYPE 0xc0ca +/* Channel Commands for PONG device */ +#define PONG_WRITE 0x21 /* Write */ +#define PONG_READ 0x22 /* Read buffer */ + +#define BUFSZ 9 +static char buffer[BUFSZ]; struct lowcore *lowcore = (void *)0x0; @@ -266,6 +272,48 @@ unreg_cb: unregister_io_int_func(irq_io); } +static void test_ping(void) +{ + int success, result; + int cnt = 0, max = 4; + + if (senseid.cu_type != PONG_CU) { + report_skip("No PONG, no ping-pong"); + return; + } + + result = register_io_int_func(irq_io); + if (result) { + report(0, "Could not register IRQ handler"); + return; + } + + while (cnt++ < max) { + snprintf(buffer, BUFSZ, "%08x\n", cnt); + success = start_subchannel(PONG_WRITE, buffer, BUFSZ); + if (!success) { + report(0, "start_subchannel failed"); + goto unreg_cb; + } + delay(100); + success = start_subchannel(PONG_READ, buffer, BUFSZ); + if (!success) { + report(0, "start_subchannel failed"); + goto unreg_cb; + } + result = atol(buffer); + if (result != (cnt + 1)) { + report(0, "Bad answer from pong: %08x - %08x", + cnt, result); + goto unreg_cb; + } + } + report(1, "ping-pong count 0x%08x", cnt); + +unreg_cb: + unregister_io_int_func(irq_io); +} + static struct { const char *name; void (*func)(void); @@ -273,6 +321,7 @@ static struct { { "enumerate (stsch)", test_enumerate }, { "enable (msch)", test_enable }, { "sense (ssch/tsch)", test_sense }, + { "ping-pong (ssch/tsch)", test_ping }, { NULL, NULL } }; -- 2.17.0