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From 81d722eaf6284d55e2da0ba6cc4874bfd262a7e2 Mon Sep 17 00:00:00 2001
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From: Thomas Huth <thuth@redhat.com>
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Date: Mon, 14 Oct 2019 10:06:43 +0100
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Subject: [PATCH 18/21] s390-bios: Add channel command codes/structs needed for
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dasd-ipl
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RH-Author: Thomas Huth <thuth@redhat.com>
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Message-id: <20191014100645.22862-16-thuth@redhat.com>
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Patchwork-id: 91792
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O-Subject: [RHEL-8.2.0 qemu-kvm PATCH v2 15/17] s390-bios: Add channel command codes/structs needed for dasd-ipl
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Bugzilla: 1664376
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Acked-by: Jens Freimann <jfreimann@redhat.com>
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From: "Jason J. Herne" <jjherne@linux.ibm.com>
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The dasd IPL procedure needs to execute a few previously unused
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channel commands. Let's define them and their associated data
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structures.
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Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
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Acked-by: Cornelia Huck <cohuck@redhat.com>
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Acked-by: Thomas Huth <thuth@redhat.com>
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Message-Id: <1554388475-18329-15-git-send-email-jjherne@linux.ibm.com>
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Signed-off-by: Thomas Huth <thuth@redhat.com>
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(cherry picked from commit 69333c36dc85b84b021766747cffc2b53df93ae8)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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pc-bios/s390-ccw/cio.h | 23 +++++++++++++++++++++++
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1 file changed, 23 insertions(+)
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diff --git a/pc-bios/s390-ccw/cio.h b/pc-bios/s390-ccw/cio.h
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index 1637e32..aaa432d 100644
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--- a/pc-bios/s390-ccw/cio.h
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+++ b/pc-bios/s390-ccw/cio.h
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@@ -200,11 +200,14 @@ typedef struct ccw1 {
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#define CCW_FLAG_IDA 0x04
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#define CCW_FLAG_SUSPEND 0x02
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+/* Common CCW commands */
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+#define CCW_CMD_READ_IPL 0x02
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#define CCW_CMD_NOOP 0x03
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#define CCW_CMD_BASIC_SENSE 0x04
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#define CCW_CMD_TIC 0x08
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#define CCW_CMD_SENSE_ID 0xe4
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+/* Virtio CCW commands */
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#define CCW_CMD_SET_VQ 0x13
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#define CCW_CMD_VDEV_RESET 0x33
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#define CCW_CMD_READ_FEAT 0x12
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@@ -216,6 +219,12 @@ typedef struct ccw1 {
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#define CCW_CMD_SET_CONF_IND 0x53
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#define CCW_CMD_READ_VQ_CONF 0x32
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+/* DASD CCW commands */
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+#define CCW_CMD_DASD_READ 0x06
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+#define CCW_CMD_DASD_SEEK 0x07
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+#define CCW_CMD_DASD_SEARCH_ID_EQ 0x31
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+#define CCW_CMD_DASD_READ_MT 0x86
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+
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/*
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* Command-mode operation request block
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*/
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@@ -333,6 +342,20 @@ typedef struct irb {
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__u32 emw[8];
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} __attribute__ ((packed, aligned(4))) Irb;
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+/* Used for SEEK ccw commands */
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+typedef struct CcwSeekData {
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+ uint16_t reserved;
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+ uint16_t cyl;
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+ uint16_t head;
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+} __attribute__((packed)) CcwSeekData;
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+
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+/* Used for SEARCH ID ccw commands */
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+typedef struct CcwSearchIdData {
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+ uint16_t cyl;
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+ uint16_t head;
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+ uint8_t record;
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+} __attribute__((packed)) CcwSearchIdData;
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+
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int enable_mss_facility(void);
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void enable_subchannel(SubChannelId schid);
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uint16_t cu_type(SubChannelId schid);
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--
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1.8.3.1
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