Lines Matching refs:qca
82 start_spi_intr_handling(struct qcaspi *qca, u16 *intr_cause)
86 qcaspi_write_register(qca, SPI_REG_INTR_ENABLE, 0, wr_verify);
87 qcaspi_read_register(qca, SPI_REG_INTR_CAUSE, intr_cause);
88 netdev_dbg(qca->net_dev, "interrupts: 0x%04x\n", *intr_cause);
92 end_spi_intr_handling(struct qcaspi *qca, u16 intr_cause)
99 qcaspi_write_register(qca, SPI_REG_INTR_CAUSE, intr_cause, 0);
100 qcaspi_write_register(qca, SPI_REG_INTR_ENABLE, intr_enable, wr_verify);
101 netdev_dbg(qca->net_dev, "acking int: 0x%04x\n", intr_cause);
105 qcaspi_write_burst(struct qcaspi *qca, u8 *src, u32 len)
123 ret = spi_sync(qca->spi_dev, &msg);
126 qcaspi_spi_error(qca);
134 qcaspi_write_legacy(struct qcaspi *qca, u8 *src, u32 len)
147 ret = spi_sync(qca->spi_dev, &msg);
150 qcaspi_spi_error(qca);
158 qcaspi_read_burst(struct qcaspi *qca, u8 *dst, u32 len)
176 ret = spi_sync(qca->spi_dev, &msg);
179 qcaspi_spi_error(qca);
187 qcaspi_read_legacy(struct qcaspi *qca, u8 *dst, u32 len)
200 ret = spi_sync(qca->spi_dev, &msg);
203 qcaspi_spi_error(qca);
211 qcaspi_tx_cmd(struct qcaspi *qca, u16 cmd)
227 ret = spi_sync(qca->spi_dev, &msg);
233 qcaspi_spi_error(qca);
239 qcaspi_tx_frame(struct qcaspi *qca, struct sk_buff *skb)
248 qcaspi_write_register(qca, SPI_REG_BFR_SIZE, len, wr_verify);
249 if (qca->legacy_mode)
250 qcaspi_tx_cmd(qca, QCA7K_SPI_WRITE | QCA7K_SPI_EXTERNAL);
255 if (count > qca->burst_len)
256 count = qca->burst_len;
258 if (qca->legacy_mode) {
259 written = qcaspi_write_legacy(qca,
263 written = qcaspi_write_burst(qca,
279 qcaspi_transmit(struct qcaspi *qca)
281 struct net_device_stats *n_stats = &qca->net_dev->stats;
287 if (qca->txr.skb[qca->txr.head] == NULL)
290 qcaspi_read_register(qca, SPI_REG_WRBUF_SPC_AVA, &available);
296 qca->stats.buf_avail_err++;
300 while (qca->txr.skb[qca->txr.head]) {
301 pkt_len = qca->txr.skb[qca->txr.head]->len + QCASPI_HW_PKT_LEN;
305 qca->stats.write_buf_miss++;
309 if (qcaspi_tx_frame(qca, qca->txr.skb[qca->txr.head]) == -1) {
310 qca->stats.write_err++;
316 n_stats->tx_bytes += qca->txr.skb[qca->txr.head]->len;
323 netif_tx_lock_bh(qca->net_dev);
324 dev_kfree_skb(qca->txr.skb[qca->txr.head]);
325 qca->txr.skb[qca->txr.head] = NULL;
326 qca->txr.size -= pkt_len;
327 new_head = qca->txr.head + 1;
328 if (new_head >= qca->txr.count)
330 qca->txr.head = new_head;
331 if (netif_queue_stopped(qca->net_dev))
332 netif_wake_queue(qca->net_dev);
333 netif_tx_unlock_bh(qca->net_dev);
340 qcaspi_receive(struct qcaspi *qca)
342 struct net_device *net_dev = qca->net_dev;
349 if (!qca->rx_skb) {
350 qca->rx_skb = netdev_alloc_skb_ip_align(net_dev,
353 if (!qca->rx_skb) {
355 qca->stats.out_of_mem++;
361 qcaspi_read_register(qca, SPI_REG_RDBUF_BYTE_AVA, &available);
370 qca->stats.buf_avail_err++;
377 qcaspi_write_register(qca, SPI_REG_BFR_SIZE, available, wr_verify);
379 if (qca->legacy_mode)
380 qcaspi_tx_cmd(qca, QCA7K_SPI_READ | QCA7K_SPI_EXTERNAL);
385 if (count > qca->burst_len)
386 count = qca->burst_len;
388 if (qca->legacy_mode) {
389 bytes_read = qcaspi_read_legacy(qca, qca->rx_buffer,
392 bytes_read = qcaspi_read_burst(qca, qca->rx_buffer,
402 qca->stats.read_err++;
406 cp = qca->rx_buffer;
408 while ((bytes_read--) && (qca->rx_skb)) {
411 retcode = qcafrm_fsm_decode(&qca->frm_handle,
412 qca->rx_skb->data,
413 skb_tailroom(qca->rx_skb),
431 qca->rx_skb->dev = qca->net_dev;
434 skb_put(qca->rx_skb, retcode);
435 qca->rx_skb->protocol = eth_type_trans(
436 qca->rx_skb, qca->rx_skb->dev);
437 skb_checksum_none_assert(qca->rx_skb);
438 netif_rx_ni(qca->rx_skb);
439 qca->rx_skb = netdev_alloc_skb_ip_align(net_dev,
441 if (!qca->rx_skb) {
444 qca->stats.out_of_mem++;
472 qcaspi_flush_tx_ring(struct qcaspi *qca)
479 netif_tx_lock_bh(qca->net_dev);
481 if (qca->txr.skb[i]) {
482 dev_kfree_skb(qca->txr.skb[i]);
483 qca->txr.skb[i] = NULL;
484 qca->net_dev->stats.tx_dropped++;
487 qca->txr.tail = 0;
488 qca->txr.head = 0;
489 qca->txr.size = 0;
490 netif_tx_unlock_bh(qca->net_dev);
494 qcaspi_qca7k_sync(struct qcaspi *qca, int event)
504 qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
505 qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
507 qca->sync = QCASPI_SYNC_UNKNOWN;
508 netdev_dbg(qca->net_dev, "sync: got CPU on, but signature was invalid, restart\n");
511 qcaspi_read_register(qca, SPI_REG_WRBUF_SPC_AVA,
514 netdev_dbg(qca->net_dev, "sync: got CPU on, but wrbuf not empty. reset!\n");
515 qca->sync = QCASPI_SYNC_UNKNOWN;
517 netdev_dbg(qca->net_dev, "sync: got CPU on, now in sync\n");
518 qca->sync = QCASPI_SYNC_READY;
524 switch (qca->sync) {
527 qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
529 qca->sync = QCASPI_SYNC_UNKNOWN;
530 netdev_dbg(qca->net_dev, "sync: bad signature, restart\n");
537 qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
539 netdev_dbg(qca->net_dev, "sync: could not read signature to reset device, retry.\n");
544 netdev_dbg(qca->net_dev, "sync: resetting device.\n");
545 qcaspi_read_register(qca, SPI_REG_SPI_CONFIG, &spi_config);
547 qcaspi_write_register(qca, SPI_REG_SPI_CONFIG, spi_config, 0);
549 qca->sync = QCASPI_SYNC_RESET;
550 qca->stats.trig_reset++;
551 qca->reset_count = 0;
554 qca->reset_count++;
555 netdev_dbg(qca->net_dev, "sync: waiting for CPU on, count %u.\n",
556 qca->reset_count);
557 if (qca->reset_count >= QCASPI_RESET_TIMEOUT) {
559 qca->sync = QCASPI_SYNC_UNKNOWN;
560 qca->stats.reset_timeout++;
561 netdev_dbg(qca->net_dev, "sync: reset timeout, restarting process.\n");
570 struct qcaspi *qca = data;
573 netdev_info(qca->net_dev, "SPI thread created\n");
577 netif_tx_disable(qca->net_dev);
578 netif_carrier_off(qca->net_dev);
579 qcaspi_flush_tx_ring(qca);
581 if (qca->sync == QCASPI_SYNC_READY) {
582 netif_carrier_on(qca->net_dev);
583 netif_wake_queue(qca->net_dev);
588 if ((qca->intr_req == qca->intr_svc) &&
589 !qca->txr.skb[qca->txr.head])
594 netdev_dbg(qca->net_dev, "have work to do. int: %d, tx_skb: %p\n",
595 qca->intr_req - qca->intr_svc,
596 qca->txr.skb[qca->txr.head]);
598 qcaspi_qca7k_sync(qca, QCASPI_EVENT_UPDATE);
600 if (qca->sync != QCASPI_SYNC_READY) {
601 netdev_dbg(qca->net_dev, "sync: not ready %u, turn off carrier and flush\n",
602 (unsigned int)qca->sync);
603 netif_stop_queue(qca->net_dev);
604 netif_carrier_off(qca->net_dev);
605 qcaspi_flush_tx_ring(qca);
609 if (qca->intr_svc != qca->intr_req) {
610 qca->intr_svc = qca->intr_req;
611 start_spi_intr_handling(qca, &intr_cause);
614 qcaspi_qca7k_sync(qca, QCASPI_EVENT_CPUON);
617 if (qca->frm_handle.state != qca->frm_handle.init)
618 qca->net_dev->stats.rx_dropped++;
620 qcafrm_fsm_init_spi(&qca->frm_handle);
621 qca->stats.device_reset++;
624 if (qca->sync != QCASPI_SYNC_READY)
627 netif_wake_queue(qca->net_dev);
628 netif_carrier_on(qca->net_dev);
633 netdev_dbg(qca->net_dev, "===> rdbuf error!\n");
634 qca->stats.read_buf_err++;
635 qca->sync = QCASPI_SYNC_UNKNOWN;
641 netdev_dbg(qca->net_dev, "===> wrbuf error!\n");
642 qca->stats.write_buf_err++;
643 qca->sync = QCASPI_SYNC_UNKNOWN;
650 if (qca->sync == QCASPI_SYNC_READY) {
652 qcaspi_receive(qca);
655 end_spi_intr_handling(qca, intr_cause);
658 if (qca->sync == QCASPI_SYNC_READY)
659 qcaspi_transmit(qca);
662 netdev_info(qca->net_dev, "SPI thread exit\n");
670 struct qcaspi *qca = data;
672 qca->intr_req++;
673 if (qca->spi_thread &&
674 qca->spi_thread->state != TASK_RUNNING)
675 wake_up_process(qca->spi_thread);
683 struct qcaspi *qca = netdev_priv(dev);
686 if (!qca)
689 qca->intr_req = 1;
690 qca->intr_svc = 0;
691 qca->sync = QCASPI_SYNC_UNKNOWN;
692 qcafrm_fsm_init_spi(&qca->frm_handle);
694 qca->spi_thread = kthread_run((void *)qcaspi_spi_thread,
695 qca, "%s", dev->name);
697 if (IS_ERR(qca->spi_thread)) {
700 return PTR_ERR(qca->spi_thread);
703 ret = request_irq(qca->spi_dev->irq, qcaspi_intr_handler, 0,
704 dev->name, qca);
707 QCASPI_DRV_NAME, qca->spi_dev->irq, ret);
708 kthread_stop(qca->spi_thread);
720 struct qcaspi *qca = netdev_priv(dev);
724 qcaspi_write_register(qca, SPI_REG_INTR_ENABLE, 0, wr_verify);
725 free_irq(qca->spi_dev->irq, qca);
727 kthread_stop(qca->spi_thread);
728 qca->spi_thread = NULL;
729 qcaspi_flush_tx_ring(qca);
739 struct qcaspi *qca = netdev_priv(dev);
747 if (qca->txr.skb[qca->txr.tail]) {
748 netdev_warn(qca->net_dev, "queue was unexpectedly full!\n");
749 netif_stop_queue(qca->net_dev);
750 qca->stats.ring_full++;
759 qca->stats.out_of_mem++;
778 netdev_dbg(qca->net_dev, "Tx-ing packet: Size: 0x%08x\n",
781 qca->txr.size += skb->len + QCASPI_HW_PKT_LEN;
783 new_tail = qca->txr.tail + 1;
784 if (new_tail >= qca->txr.count)
787 qca->txr.skb[qca->txr.tail] = skb;
788 qca->txr.tail = new_tail;
790 if (!qcaspi_tx_ring_has_space(&qca->txr)) {
791 netif_stop_queue(qca->net_dev);
792 qca->stats.ring_full++;
797 if (qca->spi_thread &&
798 qca->spi_thread->state != TASK_RUNNING)
799 wake_up_process(qca->spi_thread);
807 struct qcaspi *qca = netdev_priv(dev);
809 netdev_info(qca->net_dev, "Transmit timeout at %ld, latency %ld\n",
811 qca->net_dev->stats.tx_errors++;
813 qca->sync = QCASPI_SYNC_UNKNOWN;
815 if (qca->spi_thread)
816 wake_up_process(qca->spi_thread);
822 struct qcaspi *qca = netdev_priv(dev);
826 qca->clkspeed = qcaspi_clkspeed;
827 qca->burst_len = qcaspi_burst_len;
828 qca->spi_thread = NULL;
829 qca->buffer_size = (dev->mtu + VLAN_ETH_HLEN + QCAFRM_HEADER_LEN +
832 memset(&qca->stats, 0, sizeof(struct qcaspi_stats));
834 qca->rx_buffer = kmalloc(qca->buffer_size, GFP_KERNEL);
835 if (!qca->rx_buffer)
838 qca->rx_skb = netdev_alloc_skb_ip_align(dev, qca->net_dev->mtu +
840 if (!qca->rx_skb) {
841 kfree(qca->rx_buffer);
842 netdev_info(qca->net_dev, "Failed to allocate RX sk_buff.\n");
852 struct qcaspi *qca = netdev_priv(dev);
854 kfree(qca->rx_buffer);
855 qca->buffer_size = 0;
856 dev_kfree_skb(qca->rx_skb);
873 struct qcaspi *qca = NULL;
885 qca = netdev_priv(dev);
886 memset(qca, 0, sizeof(struct qcaspi));
888 memset(&qca->txr, 0, sizeof(qca->txr));
889 qca->txr.count = TX_RING_MAX_LEN;
893 { .compatible = "qca,qca7000" },
901 struct qcaspi *qca = NULL;
913 "qca,legacy-mode");
970 qca = netdev_priv(qcaspi_devs);
971 if (!qca) {
976 qca->net_dev = qcaspi_devs;
977 qca->spi_dev = spi;
978 qca->legacy_mode = legacy_mode;
985 ether_addr_copy(qca->net_dev->dev_addr, mac);
987 if (!is_valid_ether_addr(qca->net_dev->dev_addr)) {
988 eth_hw_addr_random(qca->net_dev);
990 qca->net_dev->dev_addr);
993 netif_carrier_off(qca->net_dev);
996 qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
997 qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
1014 qcaspi_init_device_debugfs(qca);
1023 struct qcaspi *qca = netdev_priv(qcaspi_devs);
1025 qcaspi_remove_device_debugfs(qca);