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s390/qeth: move qdio's QAOB cache into qeth 

qdio.ko no longer needs to care about how the QAOBs are allocated,
from its perspective they are merely another parameter to do_QDIO().

So for a start, shift the cache into the only qdio driver that uses
QAOBs (ie. qeth). Here there's further opportunity to optimize its
usage in the future - eg. make it per-{device, TX queue}, or only
compile it when the driver is built with CQ/QAOB support.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann 2021-10-25 11:56:52 +02:00 committed by David S. Miller
parent 2decb0b7ba
commit a18c28f0ae
3 changed files with 19 additions and 36 deletions
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2
arch/s390/include/asm/qdio.h
View File

@ -349,8 +349,6 @@ extern int qdio_allocate(struct ccw_device *cdev, unsigned int no_input_qs,
extern int qdio_establish(struct ccw_device *cdev,
struct qdio_initialize *init_data);
extern int qdio_activate(struct ccw_device *);
extern struct qaob *qdio_allocate_aob(void);
extern void qdio_release_aob(struct qaob *);
extern int do_QDIO(struct ccw_device *cdev, unsigned int callflags, int q_nr,
unsigned int bufnr, unsigned int count, struct qaob *aob);
extern int qdio_start_irq(struct ccw_device *cdev);

34
drivers/s390/cio/qdio_setup.c
View File

@ -24,19 +24,6 @@
#define QBUFF_PER_PAGE (PAGE_SIZE / sizeof(struct qdio_buffer))
static struct kmem_cache *qdio_q_cache;
static struct kmem_cache *qdio_aob_cache;
struct qaob *qdio_allocate_aob(void)
{
return kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC);
}
EXPORT_SYMBOL_GPL(qdio_allocate_aob);
void qdio_release_aob(struct qaob *aob)
{
kmem_cache_free(qdio_aob_cache, aob);
}
EXPORT_SYMBOL_GPL(qdio_release_aob);
/**
* qdio_free_buffers() - free qdio buffers
@ -447,39 +434,22 @@ void qdio_print_subchannel_info(struct qdio_irq *irq_ptr)
int __init qdio_setup_init(void)
{
int rc;
qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
256, 0, NULL);
if (!qdio_q_cache)
return -ENOMEM;
qdio_aob_cache = kmem_cache_create("qdio_aob",
sizeof(struct qaob),
sizeof(struct qaob),
0,
NULL);
if (!qdio_aob_cache) {
rc = -ENOMEM;
goto free_qdio_q_cache;
}
/* Check for OSA/FCP thin interrupts (bit 67). */
DBF_EVENT("thinint:%1d",
(css_general_characteristics.aif_osa) ? 1 : 0);
/* Check for QEBSM support in general (bit 58). */
DBF_EVENT("cssQEBSM:%1d", css_general_characteristics.qebsm);
rc = 0;
out:
return rc;
free_qdio_q_cache:
kmem_cache_destroy(qdio_q_cache);
goto out;
return 0;
}
void qdio_setup_exit(void)
{
kmem_cache_destroy(qdio_aob_cache);
kmem_cache_destroy(qdio_q_cache);
}

19
drivers/s390/net/qeth_core_main.c
View File

@ -59,6 +59,7 @@ EXPORT_SYMBOL_GPL(qeth_dbf);
static struct kmem_cache *qeth_core_header_cache;
static struct kmem_cache *qeth_qdio_outbuf_cache;
static struct kmem_cache *qeth_qaob_cache;
static struct device *qeth_core_root_dev;
static struct dentry *qeth_debugfs_root;
@ -1338,7 +1339,7 @@ static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf)
{
if (buf->aob)
qdio_release_aob(buf->aob);
kmem_cache_free(qeth_qaob_cache, buf->aob);
kmem_cache_free(qeth_qdio_outbuf_cache, buf);
}
@ -3554,7 +3555,8 @@ static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
!qeth_iqd_is_mcast_queue(card, queue) &&
count == 1) {
if (!buf->aob)
buf->aob = qdio_allocate_aob();
buf->aob = kmem_cache_zalloc(qeth_qaob_cache,
GFP_ATOMIC);
if (buf->aob) {
struct qeth_qaob_priv1 *priv;
@ -7174,6 +7176,16 @@ static int __init qeth_core_init(void)
rc = -ENOMEM;
goto cqslab_err;
}
qeth_qaob_cache = kmem_cache_create("qeth_qaob",
sizeof(struct qaob),
sizeof(struct qaob),
0, NULL);
if (!qeth_qaob_cache) {
rc = -ENOMEM;
goto qaob_err;
}
rc = ccw_driver_register(&qeth_ccw_driver);
if (rc)
goto ccw_err;
@ -7186,6 +7198,8 @@ static int __init qeth_core_init(void)
ccwgroup_err:
ccw_driver_unregister(&qeth_ccw_driver);
ccw_err:
kmem_cache_destroy(qeth_qaob_cache);
qaob_err:
kmem_cache_destroy(qeth_qdio_outbuf_cache);
cqslab_err:
kmem_cache_destroy(qeth_core_header_cache);
@ -7204,6 +7218,7 @@ static void __exit qeth_core_exit(void)
qeth_clear_dbf_list();
ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
ccw_driver_unregister(&qeth_ccw_driver);
kmem_cache_destroy(qeth_qaob_cache);
kmem_cache_destroy(qeth_qdio_outbuf_cache);
kmem_cache_destroy(qeth_core_header_cache);
root_device_unregister(qeth_core_root_dev);