Skip to content

Commit

Permalink
[SCSI] Fix ibmvscsi client for multiplatform iSeries+pSeries kernel
Browse files Browse the repository at this point in the history 
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>
  • Loading branch information
David Woodhouse authored and James Bottomley committed Oct 12, 2007
1 parent 5307b1e commit d3849d5
Show file tree
Hide file tree
Showing 5 changed files with 130 additions and 100 deletions.
2 changes: 0 additions & 2 deletions drivers/scsi/ibmvscsi/Makefile
View file
Original file line number Diff line number Diff line change
@@ -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
46 changes: 28 additions & 18 deletions drivers/scsi/ibmvscsi/ibmvscsi.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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>
Expand All @@ -92,6 +93,8 @@ static struct scsi_transport_template *ibmvscsi_transport_template;

#define IBMVSCSI_VERSION "1.5.8"

static struct ibmvscsi_ops *ibmvscsi_ops;

MODULE_DESCRIPTION("IBM Virtual SCSI");
MODULE_AUTHOR("Dave Boutcher");
MODULE_LICENSE("GPL");
Expand Down Expand Up @@ -509,8 +512,8 @@ static void ibmvscsi_reset_host(struct ibmvscsi_host_data *hostdata)
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");
Expand Down Expand Up @@ -615,7 +618,7 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct,
}

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);

Expand Down Expand Up @@ -1214,8 +1217,8 @@ void ibmvscsi_handle_crq(struct viosrp_crq *crq,
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 {
Expand All @@ -1240,10 +1243,10 @@ void ibmvscsi_handle_crq(struct viosrp_crq *crq,
/* 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");
Expand All @@ -1253,10 +1256,10 @@ void ibmvscsi_handle_crq(struct viosrp_crq *crq,
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");
Expand Down Expand Up @@ -1579,7 +1582,7 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id)
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;
Expand Down Expand Up @@ -1608,7 +1611,7 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id)
* 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
Expand Down Expand Up @@ -1636,7 +1639,7 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id)
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:
Expand All @@ -1647,8 +1650,8 @@ static int ibmvscsi_remove(struct vio_dev *vdev)
{
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);
Expand Down Expand Up @@ -1684,6 +1687,13 @@ int __init ibmvscsi_module_init(void)
{
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)
Expand Down
32 changes: 18 additions & 14 deletions drivers/scsi/ibmvscsi/ibmvscsi.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -98,21 +98,25 @@ struct ibmvscsi_host_data {
};

/* 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 */
37 changes: 23 additions & 14 deletions drivers/scsi/ibmvscsi/iseries_vscsi.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -53,7 +53,7 @@ struct srp_lp_event {
/**
* 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;

Expand All @@ -74,9 +74,9 @@ static void ibmvscsi_handle_event(struct HvLpEvent *lpevt)
/* ------------------------------------------------------------
* 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;

Expand All @@ -88,7 +88,7 @@ int ibmvscsi_init_crq_queue(struct crq_queue *queue,
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);
Expand All @@ -102,9 +102,9 @@ int ibmvscsi_init_crq_queue(struct crq_queue *queue,
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);
Expand All @@ -117,8 +117,8 @@ void ibmvscsi_release_crq_queue(struct crq_queue *queue,
*
* 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;
}
Expand All @@ -130,19 +130,20 @@ int ibmvscsi_reset_crq_queue(struct crq_queue *queue,
*
* 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,
Expand All @@ -156,3 +157,11 @@ int ibmvscsi_send_crq(struct ibmvscsi_host_data *hostdata, u64 word1, u64 word2)
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,
};
Loading

0 comments on commit d3849d5

Please sign in to comment.