From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:3300 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1732943AbfLKPqT (ORCPT ); Wed, 11 Dec 2019 10:46:19 -0500 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xBBFhOvK085130 for ; Wed, 11 Dec 2019 10:46:18 -0500 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0a-001b2d01.pphosted.com with ESMTP id 2wtdp4hw5e-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 11 Dec 2019 10:46:17 -0500 Received: from localhost by e06smtp01.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 11 Dec 2019 15:46:16 -0000 From: Pierre Morel Subject: [kvm-unit-tests PATCH v4 9/9] s390x: css: ping pong Date: Wed, 11 Dec 2019 16:46:10 +0100 In-Reply-To: <1576079170-7244-1-git-send-email-pmorel@linux.ibm.com> References: <1576079170-7244-1-git-send-email-pmorel@linux.ibm.com> Message-Id: <1576079170-7244-10-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 | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/s390x/css.c b/s390x/css.c index 7b9bdb1..a09cdff 100644 --- a/s390x/css.c +++ b/s390x/css.c @@ -26,6 +26,9 @@ #define CSS_TEST_INT_PARAM 0xcafec0ca #define PONG_CU_TYPE 0xc0ca +/* Channel Commands for PONG device */ +#define PONG_WRITE 0x21 /* Write */ +#define PONG_READ 0x22 /* Read buffer */ struct lowcore *lowcore = (void *)0x0; @@ -302,6 +305,48 @@ 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, BUF_SZ, "%08x\n", cnt); + success = start_subchannel(PONG_WRITE, buffer, 8); + if (!success) { + report(0, "start_subchannel failed"); + goto unreg_cb; + } + delay(100); + success = start_subchannel(PONG_READ, buffer, 8); + 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); @@ -309,6 +354,7 @@ 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