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[S390] qdio: fix qeth port count detection

Browse source 
qeth needs to get the port count information before
qdio has allocated a page for the chsc operation.
Extend qdio_get_ssqd_desc() to store the data in the
specified structure.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Jan Glauber 2008-12-25 13:38:43 +01:00 • committed by Martin Schwidefsky
commit bbd50e172f
5 changed files with 55 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

16
arch/s390/include/asm/qdio.h
View file

@ -373,16 +373,16 @@ struct qdio_initialize {
#define QDIO_FLAG_SYNC_OUTPUT 0x02
#define QDIO_FLAG_PCI_OUT 0x10
extern int qdio_initialize(struct qdio_initialize *init_data);
extern int qdio_allocate(struct qdio_initialize *init_data);
extern int qdio_establish(struct qdio_initialize *init_data);
extern int qdio_initialize(struct qdio_initialize *);
extern int qdio_allocate(struct qdio_initialize *);
extern int qdio_establish(struct qdio_initialize *);
extern int qdio_activate(struct ccw_device *);
extern int do_QDIO(struct ccw_device*, unsigned int flags,
int q_nr, int qidx, int count);
extern int qdio_cleanup(struct ccw_device*, int how);
extern int qdio_shutdown(struct ccw_device*, int how);
extern int do_QDIO(struct ccw_device *cdev, unsigned int callflags,
int q_nr, int bufnr, int count);
extern int qdio_cleanup(struct ccw_device*, int);
extern int qdio_shutdown(struct ccw_device*, int);
extern int qdio_free(struct ccw_device *);
extern struct qdio_ssqd_desc *qdio_get_ssqd_desc(struct ccw_device *cdev);
extern int qdio_get_ssqd_desc(struct ccw_device *dev, struct qdio_ssqd_desc*);
#endif /* __QDIO_H__ */

3
drivers/s390/cio/qdio.h
View file

@ -378,6 +378,9 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs,
int nr_output_qs);
void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr);
int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
struct subchannel_id *schid,
struct qdio_ssqd_desc *data);
int qdio_setup_irq(struct qdio_initialize *init_data);
void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
struct ccw_device *cdev);

18
drivers/s390/cio/qdio_main.c
View file

@ -1129,23 +1129,23 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
/**
* qdio_get_ssqd_desc - get qdio subchannel description
* @cdev: ccw device to get description for
* @data: where to store the ssqd
*
* Returns a pointer to the saved qdio subchannel description,
* or NULL for not setup qdio devices.
* Returns 0 or an error code. The results of the chsc are stored in the
* specified structure.
*/
struct qdio_ssqd_desc *qdio_get_ssqd_desc(struct ccw_device *cdev)
int qdio_get_ssqd_desc(struct ccw_device *cdev,
struct qdio_ssqd_desc *data)
{
struct qdio_irq *irq_ptr;
char dbf_text[15];
if (!cdev || !cdev->private)
return -EINVAL;
sprintf(dbf_text, "qssq%4x", cdev->private->schid.sch_no);
QDIO_DBF_TEXT0(0, setup, dbf_text);
irq_ptr = cdev->private->qdio_data;
if (!irq_ptr)
return NULL;
return &irq_ptr->ssqd_desc;
return qdio_setup_get_ssqd(NULL, &cdev->private->schid, data);
}
EXPORT_SYMBOL_GPL(qdio_get_ssqd_desc);

33
drivers/s390/cio/qdio_setup.c
View file

@ -243,22 +243,31 @@ no_qebsm:
QDIO_DBF_TEXT0(0, setup, "noV=V");
}
static int __get_ssqd_info(struct qdio_irq *irq_ptr)
/*
* If there is a qdio_irq we use the chsc_page and store the information
* in the qdio_irq, otherwise we copy it to the specified structure.
*/
int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr,
struct subchannel_id *schid,
struct qdio_ssqd_desc *data)
{
struct chsc_ssqd_area *ssqd;
int rc;
QDIO_DBF_TEXT0(0, setup, "getssqd");
ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
if (irq_ptr != NULL)
ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page;
else
ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL);
memset(ssqd, 0, PAGE_SIZE);
ssqd->request = (struct chsc_header) {
.length = 0x0010,
.code = 0x0024,
};
ssqd->first_sch = irq_ptr->schid.sch_no;
ssqd->last_sch = irq_ptr->schid.sch_no;
ssqd->ssid = irq_ptr->schid.ssid;
ssqd->first_sch = schid->sch_no;
ssqd->last_sch = schid->sch_no;
ssqd->ssid = schid->ssid;
if (chsc(ssqd))
return -EIO;
@ -268,11 +277,17 @@ static int __get_ssqd_info(struct qdio_irq *irq_ptr)
if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) ||
!(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) ||
(ssqd->qdio_ssqd.sch != irq_ptr->schid.sch_no))
(ssqd->qdio_ssqd.sch != schid->sch_no))
return -EINVAL;
memcpy(&irq_ptr->ssqd_desc, &ssqd->qdio_ssqd,
sizeof(struct qdio_ssqd_desc));
if (irq_ptr != NULL)
memcpy(&irq_ptr->ssqd_desc, &ssqd->qdio_ssqd,
sizeof(struct qdio_ssqd_desc));
else {
memcpy(data, &ssqd->qdio_ssqd,
sizeof(struct qdio_ssqd_desc));
free_page((unsigned long)ssqd);
}
return 0;
}
@ -282,7 +297,7 @@ void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr)
char dbf_text[15];
int rc;
rc = __get_ssqd_info(irq_ptr);
rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, NULL);
if (rc) {
QDIO_DBF_TEXT2(0, setup, "ssqdasig");
sprintf(dbf_text, "schn%4x", irq_ptr->schid.sch_no);

15
drivers/s390/net/qeth_core_main.c
View file

@ -3757,7 +3757,7 @@ static int qeth_core_driver_group(const char *buf, struct device *root_dev,
int qeth_core_hardsetup_card(struct qeth_card *card)
{
struct qdio_ssqd_desc *qdio_ssqd;
struct qdio_ssqd_desc *ssqd;
int retries = 3;
int mpno = 0;
int rc;
@ -3792,9 +3792,16 @@ retry:
return rc;
}
qdio_ssqd = qdio_get_ssqd_desc(CARD_DDEV(card));
if (qdio_ssqd)
mpno = qdio_ssqd->pcnt;
ssqd = kmalloc(sizeof(struct qdio_ssqd_desc), GFP_KERNEL);
if (!ssqd) {
rc = -ENOMEM;
goto out;
}
rc = qdio_get_ssqd_desc(CARD_DDEV(card), ssqd);
if (rc == 0)
mpno = ssqd->pcnt;
kfree(ssqd);
if (mpno)
mpno = min(mpno - 1, QETH_MAX_PORTNO);
if (card->info.portno > mpno) {