diff options
author | Julian Wiedmann <jwi@linux.ibm.com> | 2021-07-23 09:16:10 +0200 |
---|---|---|
committer | Heiko Carstens <hca@linux.ibm.com> | 2021-12-06 14:42:25 +0100 |
commit | b44995e515227e68af8a337c0538e17b05ae560f (patch) | |
tree | 90c08834167b548e7024489dc02029001fcce586 /drivers/s390 | |
parent | 513251fe25d304d1ca628c581bd0cc0422de150a (diff) | |
download | linux-b44995e515227e68af8a337c0538e17b05ae560f.tar.bz2 |
s390/qdio: split qdio_inspect_queue()
The callers know what type of queue they want to inspect. Introduce
type-specific variants to inspect an {Input,Output} queue, so that we
can avoid one function parameter and some conditional branches in the
hot paths.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r-- | drivers/s390/cio/qdio_main.c | 84 | ||||
-rw-r--r-- | drivers/s390/net/qeth_core_main.c | 16 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_qdio.c | 4 |
3 files changed, 60 insertions, 44 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index 35a32240b4ce..3f047faf59f0 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -500,6 +500,31 @@ static int get_inbound_buffer_frontier(struct qdio_q *q, unsigned int start, } } +int qdio_inspect_input_queue(struct ccw_device *cdev, unsigned int nr, + unsigned int *bufnr, unsigned int *error) +{ + struct qdio_irq *irq = cdev->private->qdio_data; + unsigned int start; + struct qdio_q *q; + int count; + + if (!irq) + return -ENODEV; + + q = irq->input_qs[nr]; + start = q->first_to_check; + *error = 0; + + count = get_inbound_buffer_frontier(q, start, error); + if (count == 0) + return 0; + + *bufnr = start; + q->first_to_check = add_buf(start, count); + return count; +} +EXPORT_SYMBOL_GPL(qdio_inspect_input_queue); + static inline int qdio_inbound_q_done(struct qdio_q *q, unsigned int start) { unsigned char state = 0; @@ -579,6 +604,31 @@ static int get_outbound_buffer_frontier(struct qdio_q *q, unsigned int start, } } +int qdio_inspect_output_queue(struct ccw_device *cdev, unsigned int nr, + unsigned int *bufnr, unsigned int *error) +{ + struct qdio_irq *irq = cdev->private->qdio_data; + unsigned int start; + struct qdio_q *q; + int count; + + if (!irq) + return -ENODEV; + + q = irq->output_qs[nr]; + start = q->first_to_check; + *error = 0; + + count = get_outbound_buffer_frontier(q, start, error); + if (count == 0) + return 0; + + *bufnr = start; + q->first_to_check = add_buf(start, count); + return count; +} +EXPORT_SYMBOL_GPL(qdio_inspect_output_queue); + static int qdio_kick_outbound_q(struct qdio_q *q, unsigned int count, unsigned long aob) { @@ -1284,40 +1334,6 @@ rescan: } EXPORT_SYMBOL(qdio_start_irq); -static int __qdio_inspect_queue(struct qdio_q *q, unsigned int *bufnr, - unsigned int *error) -{ - unsigned int start = q->first_to_check; - int count; - - *error = 0; - count = q->is_input_q ? get_inbound_buffer_frontier(q, start, error) : - get_outbound_buffer_frontier(q, start, error); - if (count == 0) - return 0; - - *bufnr = start; - - /* for the next time */ - q->first_to_check = add_buf(start, count); - - return count; -} - -int qdio_inspect_queue(struct ccw_device *cdev, unsigned int nr, bool is_input, - unsigned int *bufnr, unsigned int *error) -{ - struct qdio_irq *irq_ptr = cdev->private->qdio_data; - struct qdio_q *q; - - if (!irq_ptr) - return -ENODEV; - q = is_input ? irq_ptr->input_qs[nr] : irq_ptr->output_qs[nr]; - - return __qdio_inspect_queue(q, bufnr, error); -} -EXPORT_SYMBOL_GPL(qdio_inspect_queue); - /** * qdio_stop_irq - disable interrupt processing for the device * @cdev: associated ccw_device for the qdio subchannel diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 26c55f67289f..8cfbcb6aec07 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -5850,10 +5850,10 @@ static unsigned int qeth_rx_poll(struct qeth_card *card, int budget) /* Fetch completed RX buffers: */ if (!card->rx.b_count) { card->rx.qdio_err = 0; - card->rx.b_count = qdio_inspect_queue(CARD_DDEV(card), - 0, true, - &card->rx.b_index, - &card->rx.qdio_err); + card->rx.b_count = + qdio_inspect_input_queue(CARD_DDEV(card), 0, + &card->rx.b_index, + &card->rx.qdio_err); if (card->rx.b_count <= 0) { card->rx.b_count = 0; break; @@ -5900,8 +5900,8 @@ static void qeth_cq_poll(struct qeth_card *card) unsigned int start, error; int completed; - completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start, - &error); + completed = qdio_inspect_input_queue(CARD_DDEV(card), 1, &start, + &error); if (completed <= 0) return; @@ -6038,8 +6038,8 @@ static int qeth_tx_poll(struct napi_struct *napi, int budget) return 0; } - completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false, - &start, &error); + completed = qdio_inspect_output_queue(CARD_DDEV(card), queue_no, + &start, &error); if (completed <= 0) { /* Ensure we see TX completion for pending work: */ if (napi_complete_done(napi, 0) && diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index 6a2720105138..728945c70621 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -79,7 +79,7 @@ static void zfcp_qdio_request_tasklet(struct tasklet_struct *tasklet) unsigned int start, error; int completed; - completed = qdio_inspect_queue(cdev, 0, false, &start, &error); + completed = qdio_inspect_output_queue(cdev, 0, &start, &error); if (completed > 0) { if (error) { zfcp_qdio_handler_error(qdio, "qdreqt1", error); @@ -169,7 +169,7 @@ static void zfcp_qdio_irq_tasklet(struct tasklet_struct *tasklet) tasklet_schedule(&qdio->request_tasklet); /* Check the Response Queue: */ - completed = qdio_inspect_queue(cdev, 0, true, &start, &error); + completed = qdio_inspect_input_queue(cdev, 0, &start, &error); if (completed < 0) return; if (completed > 0) |