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Date: Mon, 25 Oct 2021 11:56:52 +0200
From: Julian Wiedmann <jwi@...ux.ibm.com>
To: David Miller <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: linux-netdev <netdev@...r.kernel.org>,
linux-s390 <linux-s390@...r.kernel.org>,
Heiko Carstens <hca@...ux.ibm.com>,
Karsten Graul <kgraul@...ux.ibm.com>,
Julian Wiedmann <jwi@...ux.ibm.com>,
Benjamin Block <bblock@...ux.ibm.com>
Subject: [PATCH net-next 3/9] 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@...ux.ibm.com>
Reviewed-by: Benjamin Block <bblock@...ux.ibm.com>
---
arch/s390/include/asm/qdio.h | 2 --
drivers/s390/cio/qdio_setup.c | 34 ++-----------------------------
drivers/s390/net/qeth_core_main.c | 19 +++++++++++++++--
3 files changed, 19 insertions(+), 36 deletions(-)
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h
index 25b5dc34db75..4b9b14b20984 100644
--- a/arch/s390/include/asm/qdio.h
+++ b/arch/s390/include/asm/qdio.h
@@ -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);
diff --git a/drivers/s390/cio/qdio_setup.c b/drivers/s390/cio/qdio_setup.c
index 20efafe47897..efbb5e5eca05 100644
--- a/drivers/s390/cio/qdio_setup.c
+++ b/drivers/s390/cio/qdio_setup.c
@@ -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);
}
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 4149ea253fa0..48dea62bdaa4 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -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);
--
2.25.1
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