[SCSI] Fix ibmvscsi client for multiplatform iSeries+pSeries kernel
If you build a multiplatform kernel for iSeries and pSeries, with
ibmvscsic support, the resulting client doesn't work on iSeries.
This fixes that, using the appropriate low-level operations
for the machine detected at runtime.
[jejb: fixed up rejections around the srp transport patch]
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Acked by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/ibmvscsi/Makefile b/drivers/scsi/ibmvscsi/Makefile
index f67d9ef..6ac0633 100644
--- a/drivers/scsi/ibmvscsi/Makefile
+++ b/drivers/scsi/ibmvscsi/Makefile
@@ -1,9 +1,7 @@
obj-$(CONFIG_SCSI_IBMVSCSI) += ibmvscsic.o
ibmvscsic-y += ibmvscsi.o
-ifndef CONFIG_PPC_PSERIES
ibmvscsic-$(CONFIG_PPC_ISERIES) += iseries_vscsi.o
-endif
ibmvscsic-$(CONFIG_PPC_PSERIES) += rpa_vscsi.o
obj-$(CONFIG_SCSI_IBMVSCSIS) += ibmvstgt.o
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index 93bd01b..cda0cc3 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -70,6 +70,7 @@
#include <linux/moduleparam.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
+#include <asm/firmware.h>
#include <asm/vio.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@@ -92,6 +93,8 @@
#define IBMVSCSI_VERSION "1.5.8"
+static struct ibmvscsi_ops *ibmvscsi_ops;
+
MODULE_DESCRIPTION("IBM Virtual SCSI");
MODULE_AUTHOR("Dave Boutcher");
MODULE_LICENSE("GPL");
@@ -509,8 +512,8 @@
atomic_set(&hostdata->request_limit, 0);
purge_requests(hostdata, DID_ERROR);
- if ((ibmvscsi_reset_crq_queue(&hostdata->queue, hostdata)) ||
- (ibmvscsi_send_crq(hostdata, 0xC001000000000000LL, 0)) ||
+ if ((ibmvscsi_ops->reset_crq_queue(&hostdata->queue, hostdata)) ||
+ (ibmvscsi_ops->send_crq(hostdata, 0xC001000000000000LL, 0)) ||
(vio_enable_interrupts(to_vio_dev(hostdata->dev)))) {
atomic_set(&hostdata->request_limit, -1);
dev_err(hostdata->dev, "error after reset\n");
@@ -615,7 +618,7 @@
}
if ((rc =
- ibmvscsi_send_crq(hostdata, crq_as_u64[0], crq_as_u64[1])) != 0) {
+ ibmvscsi_ops->send_crq(hostdata, crq_as_u64[0], crq_as_u64[1])) != 0) {
list_del(&evt_struct->list);
del_timer(&evt_struct->timer);
@@ -1214,8 +1217,8 @@
case 0x01: /* Initialization message */
dev_info(hostdata->dev, "partner initialized\n");
/* Send back a response */
- if ((rc = ibmvscsi_send_crq(hostdata,
- 0xC002000000000000LL, 0)) == 0) {
+ if ((rc = ibmvscsi_ops->send_crq(hostdata,
+ 0xC002000000000000LL, 0)) == 0) {
/* Now login */
send_srp_login(hostdata);
} else {
@@ -1240,10 +1243,10 @@
/* We need to re-setup the interpartition connection */
dev_info(hostdata->dev, "Re-enabling adapter!\n");
purge_requests(hostdata, DID_REQUEUE);
- if ((ibmvscsi_reenable_crq_queue(&hostdata->queue,
- hostdata)) ||
- (ibmvscsi_send_crq(hostdata,
- 0xC001000000000000LL, 0))) {
+ if ((ibmvscsi_ops->reenable_crq_queue(&hostdata->queue,
+ hostdata)) ||
+ (ibmvscsi_ops->send_crq(hostdata,
+ 0xC001000000000000LL, 0))) {
atomic_set(&hostdata->request_limit,
-1);
dev_err(hostdata->dev, "error after enable\n");
@@ -1253,10 +1256,10 @@
crq->format);
purge_requests(hostdata, DID_ERROR);
- if ((ibmvscsi_reset_crq_queue(&hostdata->queue,
- hostdata)) ||
- (ibmvscsi_send_crq(hostdata,
- 0xC001000000000000LL, 0))) {
+ if ((ibmvscsi_ops->reset_crq_queue(&hostdata->queue,
+ hostdata)) ||
+ (ibmvscsi_ops->send_crq(hostdata,
+ 0xC001000000000000LL, 0))) {
atomic_set(&hostdata->request_limit,
-1);
dev_err(hostdata->dev, "error after reset\n");
@@ -1579,7 +1582,7 @@
atomic_set(&hostdata->request_limit, -1);
hostdata->host->max_sectors = 32 * 8; /* default max I/O 32 pages */
- rc = ibmvscsi_init_crq_queue(&hostdata->queue, hostdata, max_requests);
+ rc = ibmvscsi_ops->init_crq_queue(&hostdata->queue, hostdata, max_requests);
if (rc != 0 && rc != H_RESOURCE) {
dev_err(&vdev->dev, "couldn't initialize crq. rc=%d\n", rc);
goto init_crq_failed;
@@ -1608,7 +1611,7 @@
* to fail if the other end is not acive. In that case we don't
* want to scan
*/
- if (ibmvscsi_send_crq(hostdata, 0xC001000000000000LL, 0) == 0
+ if (ibmvscsi_ops->send_crq(hostdata, 0xC001000000000000LL, 0) == 0
|| rc == H_RESOURCE) {
/*
* Wait around max init_timeout secs for the adapter to finish
@@ -1636,7 +1639,7 @@
add_host_failed:
release_event_pool(&hostdata->pool, hostdata);
init_pool_failed:
- ibmvscsi_release_crq_queue(&hostdata->queue, hostdata, max_requests);
+ ibmvscsi_ops->release_crq_queue(&hostdata->queue, hostdata, max_requests);
init_crq_failed:
scsi_host_put(host);
scsi_host_alloc_failed:
@@ -1647,8 +1650,8 @@
{
struct ibmvscsi_host_data *hostdata = vdev->dev.driver_data;
release_event_pool(&hostdata->pool, hostdata);
- ibmvscsi_release_crq_queue(&hostdata->queue, hostdata,
- max_requests);
+ ibmvscsi_ops->release_crq_queue(&hostdata->queue, hostdata,
+ max_requests);
srp_remove_host(hostdata->host);
scsi_remove_host(hostdata->host);
@@ -1684,6 +1687,13 @@
{
int ret;
+ if (firmware_has_feature(FW_FEATURE_ISERIES))
+ ibmvscsi_ops = &iseriesvscsi_ops;
+ else if (firmware_has_feature(FW_FEATURE_VIO))
+ ibmvscsi_ops = &rpavscsi_ops;
+ else
+ return -ENODEV;
+
ibmvscsi_transport_template =
srp_attach_transport(&ibmvscsi_transport_functions);
if (!ibmvscsi_transport_template)
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.h b/drivers/scsi/ibmvscsi/ibmvscsi.h
index b19c2e2..46e850e 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.h
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.h
@@ -98,21 +98,25 @@
};
/* routines for managing a command/response queue */
-int ibmvscsi_init_crq_queue(struct crq_queue *queue,
- struct ibmvscsi_host_data *hostdata,
- int max_requests);
-void ibmvscsi_release_crq_queue(struct crq_queue *queue,
- struct ibmvscsi_host_data *hostdata,
- int max_requests);
-int ibmvscsi_reset_crq_queue(struct crq_queue *queue,
- struct ibmvscsi_host_data *hostdata);
-
-int ibmvscsi_reenable_crq_queue(struct crq_queue *queue,
- struct ibmvscsi_host_data *hostdata);
-
void ibmvscsi_handle_crq(struct viosrp_crq *crq,
struct ibmvscsi_host_data *hostdata);
-int ibmvscsi_send_crq(struct ibmvscsi_host_data *hostdata,
- u64 word1, u64 word2);
+
+struct ibmvscsi_ops {
+ int (*init_crq_queue)(struct crq_queue *queue,
+ struct ibmvscsi_host_data *hostdata,
+ int max_requests);
+ void (*release_crq_queue)(struct crq_queue *queue,
+ struct ibmvscsi_host_data *hostdata,
+ int max_requests);
+ int (*reset_crq_queue)(struct crq_queue *queue,
+ struct ibmvscsi_host_data *hostdata);
+ int (*reenable_crq_queue)(struct crq_queue *queue,
+ struct ibmvscsi_host_data *hostdata);
+ int (*send_crq)(struct ibmvscsi_host_data *hostdata,
+ u64 word1, u64 word2);
+};
+
+extern struct ibmvscsi_ops iseriesvscsi_ops;
+extern struct ibmvscsi_ops rpavscsi_ops;
#endif /* IBMVSCSI_H */
diff --git a/drivers/scsi/ibmvscsi/iseries_vscsi.c b/drivers/scsi/ibmvscsi/iseries_vscsi.c
index 6aeb5f0..0775fde 100644
--- a/drivers/scsi/ibmvscsi/iseries_vscsi.c
+++ b/drivers/scsi/ibmvscsi/iseries_vscsi.c
@@ -53,7 +53,7 @@
/**
* standard interface for handling logical partition events.
*/
-static void ibmvscsi_handle_event(struct HvLpEvent *lpevt)
+static void iseriesvscsi_handle_event(struct HvLpEvent *lpevt)
{
struct srp_lp_event *evt = (struct srp_lp_event *)lpevt;
@@ -74,9 +74,9 @@
/* ------------------------------------------------------------
* Routines for driver initialization
*/
-int ibmvscsi_init_crq_queue(struct crq_queue *queue,
- struct ibmvscsi_host_data *hostdata,
- int max_requests)
+static int iseriesvscsi_init_crq_queue(struct crq_queue *queue,
+ struct ibmvscsi_host_data *hostdata,
+ int max_requests)
{
int rc;
@@ -88,7 +88,7 @@
goto viopath_open_failed;
}
- rc = vio_setHandler(viomajorsubtype_scsi, ibmvscsi_handle_event);
+ rc = vio_setHandler(viomajorsubtype_scsi, iseriesvscsi_handle_event);
if (rc < 0) {
printk("vio_setHandler failed with rc %d in open_event_path\n",
rc);
@@ -102,9 +102,9 @@
return -1;
}
-void ibmvscsi_release_crq_queue(struct crq_queue *queue,
- struct ibmvscsi_host_data *hostdata,
- int max_requests)
+static void iseriesvscsi_release_crq_queue(struct crq_queue *queue,
+ struct ibmvscsi_host_data *hostdata,
+ int max_requests)
{
vio_clearHandler(viomajorsubtype_scsi);
viopath_close(viopath_hostLp, viomajorsubtype_scsi, max_requests);
@@ -117,8 +117,8 @@
*
* no-op for iSeries
*/
-int ibmvscsi_reset_crq_queue(struct crq_queue *queue,
- struct ibmvscsi_host_data *hostdata)
+static int iseriesvscsi_reset_crq_queue(struct crq_queue *queue,
+ struct ibmvscsi_host_data *hostdata)
{
return 0;
}
@@ -130,19 +130,20 @@
*
* no-op for iSeries
*/
-int ibmvscsi_reenable_crq_queue(struct crq_queue *queue,
- struct ibmvscsi_host_data *hostdata)
+static int iseriesvscsi_reenable_crq_queue(struct crq_queue *queue,
+ struct ibmvscsi_host_data *hostdata)
{
return 0;
}
/**
- * ibmvscsi_send_crq: - Send a CRQ
+ * iseriesvscsi_send_crq: - Send a CRQ
* @hostdata: the adapter
* @word1: the first 64 bits of the data
* @word2: the second 64 bits of the data
*/
-int ibmvscsi_send_crq(struct ibmvscsi_host_data *hostdata, u64 word1, u64 word2)
+static int iseriesvscsi_send_crq(struct ibmvscsi_host_data *hostdata,
+ u64 word1, u64 word2)
{
single_host_data = hostdata;
return HvCallEvent_signalLpEventFast(viopath_hostLp,
@@ -156,3 +157,11 @@
VIOVERSION << 16, word1, word2, 0,
0);
}
+
+struct ibmvscsi_ops iseriesvscsi_ops = {
+ .init_crq_queue = iseriesvscsi_init_crq_queue,
+ .release_crq_queue = iseriesvscsi_release_crq_queue,
+ .reset_crq_queue = iseriesvscsi_reset_crq_queue,
+ .reenable_crq_queue = iseriesvscsi_reenable_crq_queue,
+ .send_crq = iseriesvscsi_send_crq,
+};
diff --git a/drivers/scsi/ibmvscsi/rpa_vscsi.c b/drivers/scsi/ibmvscsi/rpa_vscsi.c
index 9c14e78..1821461 100644
--- a/drivers/scsi/ibmvscsi/rpa_vscsi.c
+++ b/drivers/scsi/ibmvscsi/rpa_vscsi.c
@@ -42,14 +42,14 @@
* Routines for managing the command/response queue
*/
/**
- * ibmvscsi_handle_event: - Interrupt handler for crq events
+ * rpavscsi_handle_event: - Interrupt handler for crq events
* @irq: number of irq to handle, not used
* @dev_instance: ibmvscsi_host_data of host that received interrupt
*
* Disables interrupts and schedules srp_task
* Always returns IRQ_HANDLED
*/
-static irqreturn_t ibmvscsi_handle_event(int irq, void *dev_instance)
+static irqreturn_t rpavscsi_handle_event(int irq, void *dev_instance)
{
struct ibmvscsi_host_data *hostdata =
(struct ibmvscsi_host_data *)dev_instance;
@@ -66,9 +66,9 @@
* Frees irq, deallocates a page for messages, unmaps dma, and unregisters
* the crq with the hypervisor.
*/
-void ibmvscsi_release_crq_queue(struct crq_queue *queue,
- struct ibmvscsi_host_data *hostdata,
- int max_requests)
+static void rpavscsi_release_crq_queue(struct crq_queue *queue,
+ struct ibmvscsi_host_data *hostdata,
+ int max_requests)
{
long rc;
struct vio_dev *vdev = to_vio_dev(hostdata->dev);
@@ -108,12 +108,13 @@
}
/**
- * ibmvscsi_send_crq: - Send a CRQ
+ * rpavscsi_send_crq: - Send a CRQ
* @hostdata: the adapter
* @word1: the first 64 bits of the data
* @word2: the second 64 bits of the data
*/
-int ibmvscsi_send_crq(struct ibmvscsi_host_data *hostdata, u64 word1, u64 word2)
+static int rpavscsi_send_crq(struct ibmvscsi_host_data *hostdata,
+ u64 word1, u64 word2)
{
struct vio_dev *vdev = to_vio_dev(hostdata->dev);
@@ -121,10 +122,10 @@
}
/**
- * ibmvscsi_task: - Process srps asynchronously
+ * rpavscsi_task: - Process srps asynchronously
* @data: ibmvscsi_host_data of host
*/
-static void ibmvscsi_task(void *data)
+static void rpavscsi_task(void *data)
{
struct ibmvscsi_host_data *hostdata = (struct ibmvscsi_host_data *)data;
struct vio_dev *vdev = to_vio_dev(hostdata->dev);
@@ -190,121 +191,13 @@
}
/**
- * initialize_crq_queue: - Initializes and registers CRQ with hypervisor
- * @queue: crq_queue to initialize and register
- * @hostdata: ibmvscsi_host_data of host
- *
- * Allocates a page for messages, maps it for dma, and registers
- * the crq with the hypervisor.
- * Returns zero on success.
- */
-int ibmvscsi_init_crq_queue(struct crq_queue *queue,
- struct ibmvscsi_host_data *hostdata,
- int max_requests)
-{
- int rc;
- int retrc;
- struct vio_dev *vdev = to_vio_dev(hostdata->dev);
-
- queue->msgs = (struct viosrp_crq *)get_zeroed_page(GFP_KERNEL);
-
- if (!queue->msgs)
- goto malloc_failed;
- queue->size = PAGE_SIZE / sizeof(*queue->msgs);
-
- queue->msg_token = dma_map_single(hostdata->dev, queue->msgs,
- queue->size * sizeof(*queue->msgs),
- DMA_BIDIRECTIONAL);
-
- if (dma_mapping_error(queue->msg_token))
- goto map_failed;
-
- gather_partition_info();
- set_adapter_info(hostdata);
-
- retrc = rc = plpar_hcall_norets(H_REG_CRQ,
- vdev->unit_address,
- queue->msg_token, PAGE_SIZE);
- if (rc == H_RESOURCE)
- /* maybe kexecing and resource is busy. try a reset */
- rc = ibmvscsi_reset_crq_queue(queue,
- hostdata);
-
- if (rc == 2) {
- /* Adapter is good, but other end is not ready */
- dev_warn(hostdata->dev, "Partner adapter not ready\n");
- retrc = 0;
- } else if (rc != 0) {
- dev_warn(hostdata->dev, "Error %d opening adapter\n", rc);
- goto reg_crq_failed;
- }
-
- if (request_irq(vdev->irq,
- ibmvscsi_handle_event,
- 0, "ibmvscsi", (void *)hostdata) != 0) {
- dev_err(hostdata->dev, "couldn't register irq 0x%x\n",
- vdev->irq);
- goto req_irq_failed;
- }
-
- rc = vio_enable_interrupts(vdev);
- if (rc != 0) {
- dev_err(hostdata->dev, "Error %d enabling interrupts!!!\n", rc);
- goto req_irq_failed;
- }
-
- queue->cur = 0;
- spin_lock_init(&queue->lock);
-
- tasklet_init(&hostdata->srp_task, (void *)ibmvscsi_task,
- (unsigned long)hostdata);
-
- return retrc;
-
- req_irq_failed:
- do {
- rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
- } while ((rc == H_BUSY) || (H_IS_LONG_BUSY(rc)));
- reg_crq_failed:
- dma_unmap_single(hostdata->dev,
- queue->msg_token,
- queue->size * sizeof(*queue->msgs), DMA_BIDIRECTIONAL);
- map_failed:
- free_page((unsigned long)queue->msgs);
- malloc_failed:
- return -1;
-}
-
-/**
- * reenable_crq_queue: - reenables a crq after
- * @queue: crq_queue to initialize and register
- * @hostdata: ibmvscsi_host_data of host
- *
- */
-int ibmvscsi_reenable_crq_queue(struct crq_queue *queue,
- struct ibmvscsi_host_data *hostdata)
-{
- int rc;
- struct vio_dev *vdev = to_vio_dev(hostdata->dev);
-
- /* Re-enable the CRQ */
- do {
- rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
- } while ((rc == H_IN_PROGRESS) || (rc == H_BUSY) || (H_IS_LONG_BUSY(rc)));
-
- if (rc)
- dev_err(hostdata->dev, "Error %d enabling adapter\n", rc);
- return rc;
-}
-
-/**
* reset_crq_queue: - resets a crq after a failure
* @queue: crq_queue to initialize and register
* @hostdata: ibmvscsi_host_data of host
*
*/
-int ibmvscsi_reset_crq_queue(struct crq_queue *queue,
- struct ibmvscsi_host_data *hostdata)
+static int rpavscsi_reset_crq_queue(struct crq_queue *queue,
+ struct ibmvscsi_host_data *hostdata)
{
int rc;
struct vio_dev *vdev = to_vio_dev(hostdata->dev);
@@ -332,3 +225,119 @@
}
return rc;
}
+
+/**
+ * initialize_crq_queue: - Initializes and registers CRQ with hypervisor
+ * @queue: crq_queue to initialize and register
+ * @hostdata: ibmvscsi_host_data of host
+ *
+ * Allocates a page for messages, maps it for dma, and registers
+ * the crq with the hypervisor.
+ * Returns zero on success.
+ */
+static int rpavscsi_init_crq_queue(struct crq_queue *queue,
+ struct ibmvscsi_host_data *hostdata,
+ int max_requests)
+{
+ int rc;
+ int retrc;
+ struct vio_dev *vdev = to_vio_dev(hostdata->dev);
+
+ queue->msgs = (struct viosrp_crq *)get_zeroed_page(GFP_KERNEL);
+
+ if (!queue->msgs)
+ goto malloc_failed;
+ queue->size = PAGE_SIZE / sizeof(*queue->msgs);
+
+ queue->msg_token = dma_map_single(hostdata->dev, queue->msgs,
+ queue->size * sizeof(*queue->msgs),
+ DMA_BIDIRECTIONAL);
+
+ if (dma_mapping_error(queue->msg_token))
+ goto map_failed;
+
+ gather_partition_info();
+ set_adapter_info(hostdata);
+
+ retrc = rc = plpar_hcall_norets(H_REG_CRQ,
+ vdev->unit_address,
+ queue->msg_token, PAGE_SIZE);
+ if (rc == H_RESOURCE)
+ /* maybe kexecing and resource is busy. try a reset */
+ rc = rpavscsi_reset_crq_queue(queue,
+ hostdata);
+
+ if (rc == 2) {
+ /* Adapter is good, but other end is not ready */
+ dev_warn(hostdata->dev, "Partner adapter not ready\n");
+ retrc = 0;
+ } else if (rc != 0) {
+ dev_warn(hostdata->dev, "Error %d opening adapter\n", rc);
+ goto reg_crq_failed;
+ }
+
+ if (request_irq(vdev->irq,
+ rpavscsi_handle_event,
+ 0, "ibmvscsi", (void *)hostdata) != 0) {
+ dev_err(hostdata->dev, "couldn't register irq 0x%x\n",
+ vdev->irq);
+ goto req_irq_failed;
+ }
+
+ rc = vio_enable_interrupts(vdev);
+ if (rc != 0) {
+ dev_err(hostdata->dev, "Error %d enabling interrupts!!!\n", rc);
+ goto req_irq_failed;
+ }
+
+ queue->cur = 0;
+ spin_lock_init(&queue->lock);
+
+ tasklet_init(&hostdata->srp_task, (void *)rpavscsi_task,
+ (unsigned long)hostdata);
+
+ return retrc;
+
+ req_irq_failed:
+ do {
+ rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
+ } while ((rc == H_BUSY) || (H_IS_LONG_BUSY(rc)));
+ reg_crq_failed:
+ dma_unmap_single(hostdata->dev,
+ queue->msg_token,
+ queue->size * sizeof(*queue->msgs), DMA_BIDIRECTIONAL);
+ map_failed:
+ free_page((unsigned long)queue->msgs);
+ malloc_failed:
+ return -1;
+}
+
+/**
+ * reenable_crq_queue: - reenables a crq after
+ * @queue: crq_queue to initialize and register
+ * @hostdata: ibmvscsi_host_data of host
+ *
+ */
+static int rpavscsi_reenable_crq_queue(struct crq_queue *queue,
+ struct ibmvscsi_host_data *hostdata)
+{
+ int rc;
+ struct vio_dev *vdev = to_vio_dev(hostdata->dev);
+
+ /* Re-enable the CRQ */
+ do {
+ rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
+ } while ((rc == H_IN_PROGRESS) || (rc == H_BUSY) || (H_IS_LONG_BUSY(rc)));
+
+ if (rc)
+ dev_err(hostdata->dev, "Error %d enabling adapter\n", rc);
+ return rc;
+}
+
+struct ibmvscsi_ops rpavscsi_ops = {
+ .init_crq_queue = rpavscsi_init_crq_queue,
+ .release_crq_queue = rpavscsi_release_crq_queue,
+ .reset_crq_queue = rpavscsi_reset_crq_queue,
+ .reenable_crq_queue = rpavscsi_reenable_crq_queue,
+ .send_crq = rpavscsi_send_crq,
+};