From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:38726 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726648AbfK1MqU (ORCPT ); Thu, 28 Nov 2019 07:46:20 -0500 Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xASCgwDT058356 for ; Thu, 28 Nov 2019 07:46:18 -0500 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0a-001b2d01.pphosted.com with ESMTP id 2whcxrk0st-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 28 Nov 2019 07:46:18 -0500 Received: from localhost by e06smtp01.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 28 Nov 2019 12:46:16 -0000 From: Pierre Morel Subject: [kvm-unit-tests PATCH v2 9/9] s390x: css: ping pong Date: Thu, 28 Nov 2019 13:46:07 +0100 In-Reply-To: <1574945167-29677-1-git-send-email-pmorel@linux.ibm.com> References: <1574945167-29677-1-git-send-email-pmorel@linux.ibm.com> Message-Id: <1574945167-29677-10-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 respond to PONG_WRITE requests by incrementing an integer, stored as a string at offset 0 of the CCW data. This is only a success test, no error expected. Signed-off-by: Pierre Morel --- s390x/css.c | 46 +++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 45 insertions(+), 1 deletion(-) diff --git a/s390x/css.c b/s390x/css.c index 534864f..0761e70 100644 --- a/s390x/css.c +++ b/s390x/css.c @@ -23,6 +23,10 @@ #define SID_ONE 0x00010000 #define PSW_PRG_MASK (PSW_MASK_IO | PSW_MASK_EA | PSW_MASK_BA) +/* Local Channel Commands */ +#define PONG_WRITE 0x21 /* Write */ +#define PONG_READ 0x22 /* Read buffer */ + struct lowcore *lowcore = (void *)0x0; static struct schib schib; @@ -31,7 +35,8 @@ static struct ccw ccw[NB_CCW]; #define NB_ORB 100 static struct orb orb[NB_ORB]; static struct irb irb; -static char buffer[0x1000] __attribute__ ((aligned(8))); +#define BUF_SZ 0x1000 +static char buffer[BUF_SZ] __attribute__ ((aligned(8))); static struct senseid senseid; static const char *Channel_type[3] = { @@ -224,6 +229,44 @@ static void test_sense(void) report("cu_type: expect c0ca, got %04x", 0, senseid.cu_type); } +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; + } + + enable_io_irq(); + + while (cnt++ < max) { +report_info("cnt..: %08x", cnt); + snprintf(buffer, BUF_SZ, "%08x\n", cnt); + success = start_subchannel(PONG_WRITE, buffer, 8); + if (!success) { + report("start_subchannel failed", 0); + return; + } + delay(100); + success = start_subchannel(PONG_READ, buffer, 8); + if (!success) { + report("start_subchannel failed", 0); + return; + } + result = atol(buffer); + if (result != (cnt + 1)) { + report("Bad answer from pong: %08x - %08x", 0, cnt, result); + return; + } else + report_info("%08x - %08x", cnt, result); + + delay(100); + } + report("ping-pong count 0x%08x", 1, cnt); +} + static struct { const char *name; void (*func)(void); @@ -231,6 +274,7 @@ 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