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s390/qeth: various buffer management cleanups 

Use the new qeth_scrub_qdio_buffer() helper, remove an extra parameter
from qeth_clear_output_buffer(), init the bufstates.user field just once
(in qeth_flush_buffers()) and remove some noisy trace messages.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann 2018-07-11 17:42:38 +02:00 committed by David S. Miller
parent 0761680d52
commit 3b346c1814
1 changed files with 20 additions and 46 deletions
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66
drivers/s390/net/qeth_core_main.c
View File

@ -1267,8 +1267,7 @@ static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
}
static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
struct qeth_qdio_out_buffer *buf,
enum qeth_qdio_buffer_states newbufstate)
struct qeth_qdio_out_buffer *buf)
{
int i;
@ -1276,23 +1275,19 @@ static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
atomic_dec(&queue->set_pci_flags_count);
if (newbufstate == QETH_QDIO_BUF_EMPTY) {
qeth_release_skbs(buf);
}
qeth_release_skbs(buf);
for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
if (buf->buffer->element[i].addr && buf->is_header[i])
kmem_cache_free(qeth_core_header_cache,
buf->buffer->element[i].addr);
buf->is_header[i] = 0;
buf->buffer->element[i].length = 0;
buf->buffer->element[i].addr = NULL;
buf->buffer->element[i].eflags = 0;
buf->buffer->element[i].sflags = 0;
}
buf->buffer->element[15].eflags = 0;
buf->buffer->element[15].sflags = 0;
qeth_scrub_qdio_buffer(buf->buffer,
QETH_MAX_BUFFER_ELEMENTS(queue->card));
buf->next_element_to_fill = 0;
atomic_set(&buf->state, newbufstate);
atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
}
static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
@ -1303,7 +1298,7 @@ static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
if (!q->bufs[j])
continue;
qeth_cleanup_handled_pending(q, j, 1);
qeth_clear_output_buffer(q, q->bufs[j], QETH_QDIO_BUF_EMPTY);
qeth_clear_output_buffer(q, q->bufs[j]);
if (free) {
kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
q->bufs[j] = NULL;
@ -2473,15 +2468,12 @@ static int qeth_ulp_setup(struct qeth_card *card)
static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
{
int rc;
struct qeth_qdio_out_buffer *newbuf;
rc = 0;
newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
if (!newbuf) {
rc = -ENOMEM;
goto out;
}
if (!newbuf)
return -ENOMEM;
newbuf->buffer = q->qdio_bufs[bidx];
skb_queue_head_init(&newbuf->skb_list);
lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
@ -2490,15 +2482,7 @@ static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
newbuf->next_pending = q->bufs[bidx];
atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
q->bufs[bidx] = newbuf;
if (q->bufstates) {
q->bufstates[bidx].user = newbuf;
QETH_CARD_TEXT_(q->card, 2, "nbs%d", bidx);
QETH_CARD_TEXT_(q->card, 2, "%lx", (long) newbuf);
QETH_CARD_TEXT_(q->card, 2, "%lx",
(long) newbuf->next_pending);
}
out:
return rc;
return 0;
}
static void qeth_free_qdio_out_buf(struct qeth_qdio_out_q *q)
@ -2908,8 +2892,7 @@ int qeth_init_qdio_queues(struct qeth_card *card)
QDIO_MAX_BUFFERS_PER_Q);
for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
qeth_clear_output_buffer(card->qdio.out_qs[i],
card->qdio.out_qs[i]->bufs[j],
QETH_QDIO_BUF_EMPTY);
card->qdio.out_qs[i]->bufs[j]);
}
card->qdio.out_qs[i]->card = card;
card->qdio.out_qs[i]->next_buf_to_fill = 0;
@ -3634,10 +3617,10 @@ int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
}
EXPORT_SYMBOL_GPL(qeth_configure_cq);
static void qeth_qdio_cq_handler(struct qeth_card *card,
unsigned int qdio_err,
unsigned int queue, int first_element, int count) {
static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
unsigned int queue, int first_element,
int count)
{
struct qeth_qdio_q *cq = card->qdio.c_q;
int i;
int rc;
@ -3663,25 +3646,17 @@ static void qeth_qdio_cq_handler(struct qeth_card *card,
for (i = first_element; i < first_element + count; ++i) {
int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
int e;
int e = 0;
e = 0;
while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
buffer->element[e].addr) {
unsigned long phys_aob_addr;
phys_aob_addr = (unsigned long) buffer->element[e].addr;
qeth_qdio_handle_aob(card, phys_aob_addr);
buffer->element[e].addr = NULL;
buffer->element[e].eflags = 0;
buffer->element[e].sflags = 0;
buffer->element[e].length = 0;
++e;
}
buffer->element[15].eflags = 0;
buffer->element[15].sflags = 0;
qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
}
rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
card->qdio.c_q->next_buf_to_init,
@ -3782,8 +3757,7 @@ static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
qeth_notify_skbs(queue, buffer, n);
}
qeth_clear_output_buffer(queue, buffer,
QETH_QDIO_BUF_EMPTY);
qeth_clear_output_buffer(queue, buffer);
}
qeth_cleanup_handled_pending(queue, bidx, 0);
}