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authorPaolo Bonzini <pbonzini@redhat.com>2011-04-18 17:11:14 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2011-05-26 12:14:14 +0200
commitcfdc1bb06ee4cd3a7e4aa0ebf14b00c0ce3a5e94 (patch)
tree3f7da29f2bb352933928902c461c33bde5026d85 /hw
parentab9adc88c80186cfef29bda076363e20aa675241 (diff)
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scsi: introduce SCSIBusOps
There are more operations than a SCSI bus can handle, besides completing commands. One example, which this series will introduce, is cleaning up after a request is cancelled. More long term, a "SCSI bus" can represent the LUNs attached to a target; in this case, while all commands will ultimately reach a logical unit, it is the target who is in charge of answering REPORT LUNs. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Cc: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'hw')
-rw-r--r--hw/esp.c6
-rw-r--r--hw/lsi53c895a.c6
-rw-r--r--hw/scsi-bus.c12
-rw-r--r--hw/scsi-generic.c2
-rw-r--r--hw/scsi.h13
-rw-r--r--hw/spapr_vscsi.c6
-rw-r--r--hw/usb-msd.c6
7 files changed, 34 insertions, 17 deletions
diff --git a/hw/esp.c b/hw/esp.c
index fa9d2a2..ae18401 100644
--- a/hw/esp.c
+++ b/hw/esp.c
@@ -714,6 +714,10 @@ void esp_init(target_phys_addr_t espaddr, int it_shift,
*dma_enable = qdev_get_gpio_in(dev, 1);
}
+static const struct SCSIBusOps esp_scsi_ops = {
+ .complete = esp_command_complete
+};
+
static int esp_init1(SysBusDevice *dev)
{
ESPState *s = FROM_SYSBUS(ESPState, dev);
@@ -728,7 +732,7 @@ static int esp_init1(SysBusDevice *dev)
qdev_init_gpio_in(&dev->qdev, esp_gpio_demux, 2);
- scsi_bus_new(&s->bus, &dev->qdev, 0, ESP_MAX_DEVS, esp_command_complete);
+ scsi_bus_new(&s->bus, &dev->qdev, 0, ESP_MAX_DEVS, &esp_scsi_ops);
return scsi_bus_legacy_handle_cmdline(&s->bus);
}
diff --git a/hw/lsi53c895a.c b/hw/lsi53c895a.c
index 2ce38a9..704e8ad 100644
--- a/hw/lsi53c895a.c
+++ b/hw/lsi53c895a.c
@@ -2205,6 +2205,10 @@ static int lsi_scsi_uninit(PCIDevice *d)
return 0;
}
+static const struct SCSIBusOps lsi_scsi_ops = {
+ .complete = lsi_command_complete
+};
+
static int lsi_scsi_init(PCIDevice *dev)
{
LSIState *s = DO_UPCAST(LSIState, dev, dev);
@@ -2241,7 +2245,7 @@ static int lsi_scsi_init(PCIDevice *dev)
PCI_BASE_ADDRESS_SPACE_MEMORY, lsi_ram_mapfunc);
QTAILQ_INIT(&s->queue);
- scsi_bus_new(&s->bus, &dev->qdev, 1, LSI_MAX_DEVS, lsi_command_complete);
+ scsi_bus_new(&s->bus, &dev->qdev, 1, LSI_MAX_DEVS, &lsi_scsi_ops);
if (!dev->qdev.hotplugged) {
return scsi_bus_legacy_handle_cmdline(&s->bus);
}
diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index 191cbab..1850a87 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -21,13 +21,13 @@ static int next_scsi_bus;
/* Create a scsi bus, and attach devices to it. */
void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,
- scsi_completionfn complete)
+ const SCSIBusOps *ops)
{
qbus_create_inplace(&bus->qbus, &scsi_bus_info, host, NULL);
bus->busnr = next_scsi_bus++;
bus->tcq = tcq;
bus->ndev = ndev;
- bus->complete = complete;
+ bus->ops = ops;
bus->qbus.allow_hotplug = 1;
}
@@ -503,7 +503,7 @@ static const char *scsi_command_name(uint8_t cmd)
void scsi_req_data(SCSIRequest *req, int len)
{
trace_scsi_req_data(req->dev->id, req->lun, req->tag, len);
- req->bus->complete(req->bus, SCSI_REASON_DATA, req->tag, len);
+ req->bus->ops->complete(req->bus, SCSI_REASON_DATA, req->tag, len);
}
void scsi_req_print(SCSIRequest *req)
@@ -538,9 +538,9 @@ void scsi_req_complete(SCSIRequest *req)
{
assert(req->status != -1);
scsi_req_dequeue(req);
- req->bus->complete(req->bus, SCSI_REASON_DONE,
- req->tag,
- req->status);
+ req->bus->ops->complete(req->bus, SCSI_REASON_DONE,
+ req->tag,
+ req->status);
}
static char *scsibus_get_fw_dev_path(DeviceState *dev)
diff --git a/hw/scsi-generic.c b/hw/scsi-generic.c
index e4f1f30..f09458b 100644
--- a/hw/scsi-generic.c
+++ b/hw/scsi-generic.c
@@ -335,7 +335,7 @@ static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
s->senselen = 7;
s->driver_status = SG_ERR_DRIVER_SENSE;
bus = scsi_bus_from_device(d);
- bus->complete(bus, SCSI_REASON_DONE, tag, CHECK_CONDITION);
+ bus->ops->complete(bus, SCSI_REASON_DONE, tag, CHECK_CONDITION);
return 0;
}
diff --git a/hw/scsi.h b/hw/scsi.h
index 7c09f32..d4ecc9b 100644
--- a/hw/scsi.h
+++ b/hw/scsi.h
@@ -16,10 +16,9 @@ enum scsi_reason {
};
typedef struct SCSIBus SCSIBus;
+typedef struct SCSIBusOps SCSIBusOps;
typedef struct SCSIDevice SCSIDevice;
typedef struct SCSIDeviceInfo SCSIDeviceInfo;
-typedef void (*scsi_completionfn)(SCSIBus *bus, int reason, uint32_t tag,
- uint32_t arg);
enum SCSIXferMode {
SCSI_XFER_NONE, /* TEST_UNIT_READY, ... */
@@ -74,20 +73,22 @@ struct SCSIDeviceInfo {
uint8_t *(*get_buf)(SCSIDevice *s, uint32_t tag);
};
-typedef void (*SCSIAttachFn)(DeviceState *host, BlockDriverState *bdrv,
- int unit);
+struct SCSIBusOps {
+ void (*complete)(SCSIBus *bus, int reason, uint32_t tag, uint32_t arg);
+};
+
struct SCSIBus {
BusState qbus;
int busnr;
int tcq, ndev;
- scsi_completionfn complete;
+ const SCSIBusOps *ops;
SCSIDevice *devs[MAX_SCSI_DEVS];
};
void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,
- scsi_completionfn complete);
+ const SCSIBusOps *ops);
void scsi_qdev_register(SCSIDeviceInfo *info);
static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
diff --git a/hw/spapr_vscsi.c b/hw/spapr_vscsi.c
index 9928334..c183008 100644
--- a/hw/spapr_vscsi.c
+++ b/hw/spapr_vscsi.c
@@ -907,6 +907,10 @@ static int vscsi_do_crq(struct VIOsPAPRDevice *dev, uint8_t *crq_data)
return 0;
}
+static const struct SCSIBusOps vscsi_scsi_ops = {
+ .complete = vscsi_command_complete
+};
+
static int spapr_vscsi_init(VIOsPAPRDevice *dev)
{
VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev);
@@ -923,7 +927,7 @@ static int spapr_vscsi_init(VIOsPAPRDevice *dev)
dev->crq.SendFunc = vscsi_do_crq;
scsi_bus_new(&s->bus, &dev->qdev, 1, VSCSI_REQ_LIMIT,
- vscsi_command_complete);
+ &vscsi_scsi_ops);
if (!dev->qdev.hotplugged) {
scsi_bus_legacy_handle_cmdline(&s->bus);
}
diff --git a/hw/usb-msd.c b/hw/usb-msd.c
index bd1c3a4..c0a381a 100644
--- a/hw/usb-msd.c
+++ b/hw/usb-msd.c
@@ -487,6 +487,10 @@ static void usb_msd_password_cb(void *opaque, int err)
qdev_unplug(&s->dev.qdev);
}
+static const struct SCSIBusOps usb_msd_scsi_ops = {
+ .complete = usb_msd_command_complete
+};
+
static int usb_msd_initfn(USBDevice *dev)
{
MSDState *s = DO_UPCAST(MSDState, dev, dev);
@@ -516,7 +520,7 @@ static int usb_msd_initfn(USBDevice *dev)
}
usb_desc_init(dev);
- scsi_bus_new(&s->bus, &s->dev.qdev, 0, 1, usb_msd_command_complete);
+ scsi_bus_new(&s->bus, &s->dev.qdev, 0, 1, &usb_msd_scsi_ops);
s->scsi_dev = scsi_bus_legacy_add_drive(&s->bus, bs, 0, !!s->removable);
if (!s->scsi_dev) {
return -1;