pc-bios/s390-ccw: Split virtio-scsi code from virtio_blk_setup_device()

The next patch is going to add more virtio-block specific code to
virtio_blk_setup_device(), and if the virtio-scsi code is also in
there, this is more cumbersome. And the calling function virtio_setup()
in main.c looks at the device type already anyway, so it's more
logical to separate the virtio-scsi stuff into a new function in
virtio-scsi.c instead.

Message-Id: <20220704111903.62400-10-thuth@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

pc-bios/s390-ccw/main.c

@@ -14,6 +14,7 @@
 #include "s390-ccw.h"
 #include "cio.h"
 #include "virtio.h"
+#include "virtio-scsi.h"
 #include "dasd-ipl.h"
 
 char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
@@ -218,6 +219,7 @@ static int virtio_setup(void)
 {
     VDev *vdev = virtio_get_device();
     QemuIplParameters *early_qipl = (QemuIplParameters *)QIPL_ADDRESS;
+    int ret;
 
     memcpy(&qipl, early_qipl, sizeof(QemuIplParameters));
 
@@ -225,18 +227,26 @@ static int virtio_setup(void)
         menu_setup();
     }
 
-    if (virtio_get_device_type() == VIRTIO_ID_NET) {
+    switch (vdev->senseid.cu_model) {
+    case VIRTIO_ID_NET:
         sclp_print("Network boot device detected\n");
         vdev->netboot_start_addr = qipl.netboot_start_addr;
-    } else {
+        return 0;
-        int ret = virtio_blk_setup_device(blk_schid);
+    case VIRTIO_ID_BLOCK:
-        if (ret) {
+        ret = virtio_blk_setup_device(blk_schid);
-            return ret;
+        break;
-        }
+    case VIRTIO_ID_SCSI:
+        ret = virtio_scsi_setup_device(blk_schid);
+        break;
+    default:
+        panic("\n! No IPL device available !\n");
+    }
+
+    if (!ret) {
         IPL_assert(virtio_ipl_disk_is_valid(), "No valid IPL device detected");
     }
 
-    return 0;
+    return ret;
 }
 
 static void ipl_boot_device(void)

pc-bios/s390-ccw/virtio-blkdev.c

@@ -222,27 +222,11 @@ uint64_t virtio_get_blocks(void)
 int virtio_blk_setup_device(SubChannelId schid)
 {
     VDev *vdev = virtio_get_device();
-    int ret = 0;
 
     vdev->schid = schid;
     virtio_setup_ccw(vdev);
 
-    switch (vdev->senseid.cu_model) {
+    sclp_print("Using virtio-blk.\n");
-    case VIRTIO_ID_BLOCK:
-        sclp_print("Using virtio-blk.\n");
-        break;
-    case VIRTIO_ID_SCSI:
-        IPL_assert(vdev->config.scsi.sense_size == VIRTIO_SCSI_SENSE_SIZE,
-            "Config: sense size mismatch");
-        IPL_assert(vdev->config.scsi.cdb_size == VIRTIO_SCSI_CDB_SIZE,
-            "Config: CDB size mismatch");
 
-        sclp_print("Using virtio-scsi.\n");
+    return 0;
-        ret = virtio_scsi_setup(vdev);
-        break;
-    default:
-        panic("\n! No IPL device available !\n");
-    }
-
-    return ret;
 }

pc-bios/s390-ccw/virtio-scsi.c

@@ -329,7 +329,7 @@ static void scsi_parse_capacity_report(void *data,
     }
 }
 
-int virtio_scsi_setup(VDev *vdev)
+static int virtio_scsi_setup(VDev *vdev)
 {
     int retry_test_unit_ready = 3;
     uint8_t data[256];
@@ -430,3 +430,20 @@ int virtio_scsi_setup(VDev *vdev)
 
     return 0;
 }
+
+int virtio_scsi_setup_device(SubChannelId schid)
+{
+    VDev *vdev = virtio_get_device();
+
+    vdev->schid = schid;
+    virtio_setup_ccw(vdev);
+
+    IPL_assert(vdev->config.scsi.sense_size == VIRTIO_SCSI_SENSE_SIZE,
+               "Config: sense size mismatch");
+    IPL_assert(vdev->config.scsi.cdb_size == VIRTIO_SCSI_CDB_SIZE,
+               "Config: CDB size mismatch");
+
+    sclp_print("Using virtio-scsi.\n");
+
+    return virtio_scsi_setup(vdev);
+}

pc-bios/s390-ccw/virtio-scsi.h

@@ -67,8 +67,8 @@ static inline bool virtio_scsi_response_ok(const VirtioScsiCmdResp *r)
         return r->response == VIRTIO_SCSI_S_OK && r->status == CDB_STATUS_GOOD;
 }
 
-int virtio_scsi_setup(VDev *vdev);
 int virtio_scsi_read_many(VDev *vdev,
                           ulong sector, void *load_addr, int sec_num);
+int virtio_scsi_setup_device(SubChannelId schid);
 
 #endif /* VIRTIO_SCSI_H */