From: Pierre Morel <pmorel@linux.ibm.com>
To: kvm@vger.kernel.org
Cc: linux-s390@vger.kernel.org, frankja@linux.ibm.com,
david@redhat.com, thuth@redhat.com, cohuck@redhat.com
Subject: [kvm-unit-tests PATCH v7 12/12] s390x: css: ping pong
Date: Mon, 18 May 2020 18:07:31 +0200 [thread overview]
Message-ID: <1589818051-20549-13-git-send-email-pmorel@linux.ibm.com> (raw)
In-Reply-To: <1589818051-20549-1-git-send-email-pmorel@linux.ibm.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 <pmorel@linux.ibm.com>
---
s390x/css.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/s390x/css.c b/s390x/css.c
index c94a916..da80574 100644
--- a/s390x/css.c
+++ b/s390x/css.c
@@ -21,6 +21,12 @@
#include <css.h>
#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;
@@ -274,6 +280,53 @@ 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("Device is not a pong device.");
+ 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, 0);
+ if (!success) {
+ report(0, "start_subchannel failed");
+ goto unreg_cb;
+ }
+
+ wait_for_interrupt(PSW_MASK_IO);
+
+ success = start_subchannel(PONG_READ, buffer, BUFSZ, 0);
+ if (!success) {
+ report(0, "start_subchannel failed");
+ goto unreg_cb;
+ }
+
+ wait_for_interrupt(PSW_MASK_IO);
+
+ 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);
@@ -281,6 +334,7 @@ static struct {
{ "enumerate (stsch)", test_enumerate },
{ "enable (msch)", test_enable },
{ "sense (ssch/tsch)", test_sense },
+ { "ping-pong (ssch/tsch)", test_ping },
{ NULL, NULL }
};
--
2.25.1
prev parent reply other threads:[~2020-05-18 16:07 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-18 16:07 [kvm-unit-tests PATCH v7 00/12] s390x: Testing the Channel Subsystem I/O Pierre Morel
2020-05-18 16:07 ` [kvm-unit-tests PATCH v7 01/12] s390x: saving regs for interrupts Pierre Morel
2020-05-26 10:30 ` Janosch Frank
2020-05-26 11:39 ` Pierre Morel
2020-05-18 16:07 ` [kvm-unit-tests PATCH v7 02/12] s390x: Use PSW bits definitions in cstart Pierre Morel
2020-05-26 10:17 ` Janosch Frank
2020-05-26 11:40 ` Pierre Morel
2020-05-18 16:07 ` [kvm-unit-tests PATCH v7 03/12] s390x: Move control register bit definitions and add AFP to them Pierre Morel
2020-05-25 18:57 ` Thomas Huth
2020-05-26 11:51 ` Pierre Morel
2020-05-18 16:07 ` [kvm-unit-tests PATCH v7 04/12] s390x: interrupt registration Pierre Morel
2020-05-26 18:08 ` Thomas Huth
2020-05-27 15:54 ` Pierre Morel
2020-05-18 16:07 ` [kvm-unit-tests PATCH v7 05/12] s390x: export the clock get_clock_ms() utility Pierre Morel
2020-05-26 18:10 ` Thomas Huth
2020-06-04 6:49 ` Pierre Morel
2020-05-18 16:07 ` [kvm-unit-tests PATCH v7 06/12] s390x: use get_clock_ms() to calculate a delay in ms Pierre Morel
2020-05-26 18:16 ` Thomas Huth
2020-06-04 7:21 ` Pierre Morel
2020-05-18 16:07 ` [kvm-unit-tests PATCH v7 07/12] s390x: Library resources for CSS tests Pierre Morel
2020-05-26 16:30 ` Cornelia Huck
2020-06-04 7:42 ` Pierre Morel
2020-05-18 16:07 ` [kvm-unit-tests PATCH v7 08/12] s390x: css: stsch, enumeration test Pierre Morel
2020-05-25 19:12 ` Thomas Huth
2020-05-26 10:41 ` Janosch Frank
2020-05-26 10:49 ` Thomas Huth
2020-05-26 11:38 ` Pierre Morel
2020-05-27 8:55 ` Cornelia Huck
2020-06-04 11:35 ` Pierre Morel
2020-06-04 11:45 ` Thomas Huth
2020-06-04 12:27 ` Pierre Morel
2020-05-18 16:07 ` [kvm-unit-tests PATCH v7 09/12] s390x: css: msch, enable test Pierre Morel
2020-05-27 9:42 ` Cornelia Huck
2020-06-04 12:46 ` Pierre Morel
2020-06-04 13:29 ` Cornelia Huck
2020-06-05 7:37 ` Pierre Morel
2020-06-05 8:24 ` Pierre Morel
2020-06-05 9:00 ` Cornelia Huck
2020-05-18 16:07 ` [kvm-unit-tests PATCH v7 10/12] s390x: define function to wait for interrupt Pierre Morel
2020-05-26 10:42 ` Janosch Frank
2020-05-26 11:40 ` Pierre Morel
2020-05-27 9:45 ` Cornelia Huck
2020-06-04 12:47 ` Pierre Morel
2020-05-18 16:07 ` [kvm-unit-tests PATCH v7 11/12] s390x: css: ssch/tsch with sense and interrupt Pierre Morel
2020-05-27 10:09 ` Cornelia Huck
2020-06-05 7:37 ` Pierre Morel
2020-06-05 9:02 ` Cornelia Huck
2020-05-18 16:07 ` Pierre Morel [this message]
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