Lines Matching refs:qca
81 start_spi_intr_handling(struct qcaspi *qca, u16 *intr_cause)
85 qcaspi_write_register(qca, SPI_REG_INTR_ENABLE, 0, wr_verify);
86 qcaspi_read_register(qca, SPI_REG_INTR_CAUSE, intr_cause);
87 netdev_dbg(qca->net_dev, "interrupts: 0x%04x\n", *intr_cause);
91 end_spi_intr_handling(struct qcaspi *qca, u16 intr_cause)
98 qcaspi_write_register(qca, SPI_REG_INTR_CAUSE, intr_cause, 0);
99 qcaspi_write_register(qca, SPI_REG_INTR_ENABLE, intr_enable, wr_verify);
100 netdev_dbg(qca->net_dev, "acking int: 0x%04x\n", intr_cause);
104 qcaspi_write_burst(struct qcaspi *qca, u8 *src, u32 len)
122 ret = spi_sync(qca->spi_dev, &msg);
125 qcaspi_spi_error(qca);
133 qcaspi_write_legacy(struct qcaspi *qca, u8 *src, u32 len)
146 ret = spi_sync(qca->spi_dev, &msg);
149 qcaspi_spi_error(qca);
157 qcaspi_read_burst(struct qcaspi *qca, u8 *dst, u32 len)
175 ret = spi_sync(qca->spi_dev, &msg);
178 qcaspi_spi_error(qca);
186 qcaspi_read_legacy(struct qcaspi *qca, u8 *dst, u32 len)
199 ret = spi_sync(qca->spi_dev, &msg);
202 qcaspi_spi_error(qca);
210 qcaspi_tx_cmd(struct qcaspi *qca, u16 cmd)
226 ret = spi_sync(qca->spi_dev, &msg);
232 qcaspi_spi_error(qca);
238 qcaspi_tx_frame(struct qcaspi *qca, struct sk_buff *skb)
247 qcaspi_write_register(qca, SPI_REG_BFR_SIZE, len, wr_verify);
248 if (qca->legacy_mode)
249 qcaspi_tx_cmd(qca, QCA7K_SPI_WRITE | QCA7K_SPI_EXTERNAL);
254 if (count > qca->burst_len)
255 count = qca->burst_len;
257 if (qca->legacy_mode) {
258 written = qcaspi_write_legacy(qca,
262 written = qcaspi_write_burst(qca,
278 qcaspi_transmit(struct qcaspi *qca)
280 struct net_device_stats *n_stats = &qca->net_dev->stats;
286 if (qca->txr.skb[qca->txr.head] == NULL)
289 qcaspi_read_register(qca, SPI_REG_WRBUF_SPC_AVA, &available);
295 qca->stats.buf_avail_err++;
299 while (qca->txr.skb[qca->txr.head]) {
300 pkt_len = qca->txr.skb[qca->txr.head]->len + QCASPI_HW_PKT_LEN;
304 qca->stats.write_buf_miss++;
308 if (qcaspi_tx_frame(qca, qca->txr.skb[qca->txr.head]) == -1) {
309 qca->stats.write_err++;
315 n_stats->tx_bytes += qca->txr.skb[qca->txr.head]->len;
322 netif_tx_lock_bh(qca->net_dev);
323 dev_kfree_skb(qca->txr.skb[qca->txr.head]);
324 qca->txr.skb[qca->txr.head] = NULL;
325 qca->txr.size -= pkt_len;
326 new_head = qca->txr.head + 1;
327 if (new_head >= qca->txr.count)
329 qca->txr.head = new_head;
330 if (netif_queue_stopped(qca->net_dev))
331 netif_wake_queue(qca->net_dev);
332 netif_tx_unlock_bh(qca->net_dev);
339 qcaspi_receive(struct qcaspi *qca)
341 struct net_device *net_dev = qca->net_dev;
348 if (!qca->rx_skb) {
349 qca->rx_skb = netdev_alloc_skb_ip_align(net_dev,
352 if (!qca->rx_skb) {
354 qca->stats.out_of_mem++;
360 qcaspi_read_register(qca, SPI_REG_RDBUF_BYTE_AVA, &available);
369 qca->stats.buf_avail_err++;
376 qcaspi_write_register(qca, SPI_REG_BFR_SIZE, available, wr_verify);
378 if (qca->legacy_mode)
379 qcaspi_tx_cmd(qca, QCA7K_SPI_READ | QCA7K_SPI_EXTERNAL);
384 if (count > qca->burst_len)
385 count = qca->burst_len;
387 if (qca->legacy_mode) {
388 bytes_read = qcaspi_read_legacy(qca, qca->rx_buffer,
391 bytes_read = qcaspi_read_burst(qca, qca->rx_buffer,
401 qca->stats.read_err++;
405 cp = qca->rx_buffer;
407 while ((bytes_read--) && (qca->rx_skb)) {
410 retcode = qcafrm_fsm_decode(&qca->frm_handle,
411 qca->rx_skb->data,
412 skb_tailroom(qca->rx_skb),
430 qca->rx_skb->dev = qca->net_dev;
433 skb_put(qca->rx_skb, retcode);
434 qca->rx_skb->protocol = eth_type_trans(
435 qca->rx_skb, qca->rx_skb->dev);
436 skb_checksum_none_assert(qca->rx_skb);
437 netif_rx(qca->rx_skb);
438 qca->rx_skb = netdev_alloc_skb_ip_align(net_dev,
440 if (!qca->rx_skb) {
443 qca->stats.out_of_mem++;
471 qcaspi_flush_tx_ring(struct qcaspi *qca)
478 netif_tx_lock_bh(qca->net_dev);
480 if (qca->txr.skb[i]) {
481 dev_kfree_skb(qca->txr.skb[i]);
482 qca->txr.skb[i] = NULL;
483 qca->net_dev->stats.tx_dropped++;
486 qca->txr.tail = 0;
487 qca->txr.head = 0;
488 qca->txr.size = 0;
489 netif_tx_unlock_bh(qca->net_dev);
493 qcaspi_qca7k_sync(struct qcaspi *qca, int event)
503 qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
504 qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
506 if (qca->sync == QCASPI_SYNC_READY)
507 qca->stats.bad_signature++;
509 qca->sync = QCASPI_SYNC_UNKNOWN;
510 netdev_dbg(qca->net_dev, "sync: got CPU on, but signature was invalid, restart\n");
514 qcaspi_read_register(qca, SPI_REG_WRBUF_SPC_AVA,
517 netdev_dbg(qca->net_dev, "sync: got CPU on, but wrbuf not empty. reset!\n");
518 qca->sync = QCASPI_SYNC_UNKNOWN;
520 netdev_dbg(qca->net_dev, "sync: got CPU on, now in sync\n");
521 qca->sync = QCASPI_SYNC_READY;
527 switch (qca->sync) {
530 qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
532 qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
535 qca->sync = QCASPI_SYNC_UNKNOWN;
536 qca->stats.bad_signature++;
537 netdev_dbg(qca->net_dev, "sync: bad signature, restart\n");
544 qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
546 netdev_dbg(qca->net_dev, "sync: could not read signature to reset device, retry.\n");
551 netdev_dbg(qca->net_dev, "sync: resetting device.\n");
552 qcaspi_read_register(qca, SPI_REG_SPI_CONFIG, &spi_config);
554 qcaspi_write_register(qca, SPI_REG_SPI_CONFIG, spi_config, 0);
556 qca->sync = QCASPI_SYNC_RESET;
557 qca->stats.trig_reset++;
558 qca->reset_count = 0;
561 qca->reset_count++;
562 netdev_dbg(qca->net_dev, "sync: waiting for CPU on, count %u.\n",
563 qca->reset_count);
564 if (qca->reset_count >= QCASPI_RESET_TIMEOUT) {
566 qca->sync = QCASPI_SYNC_UNKNOWN;
567 qca->stats.reset_timeout++;
568 netdev_dbg(qca->net_dev, "sync: reset timeout, restarting process.\n");
577 struct qcaspi *qca = data;
580 netdev_info(qca->net_dev, "SPI thread created\n");
584 netif_tx_disable(qca->net_dev);
585 netif_carrier_off(qca->net_dev);
586 qcaspi_flush_tx_ring(qca);
588 if (qca->sync == QCASPI_SYNC_READY) {
589 netif_carrier_on(qca->net_dev);
590 netif_wake_queue(qca->net_dev);
595 if ((qca->intr_req == qca->intr_svc) &&
596 !qca->txr.skb[qca->txr.head])
601 netdev_dbg(qca->net_dev, "have work to do. int: %d, tx_skb: %p\n",
602 qca->intr_req - qca->intr_svc,
603 qca->txr.skb[qca->txr.head]);
605 qcaspi_qca7k_sync(qca, QCASPI_EVENT_UPDATE);
607 if (qca->sync != QCASPI_SYNC_READY) {
608 netdev_dbg(qca->net_dev, "sync: not ready %u, turn off carrier and flush\n",
609 (unsigned int)qca->sync);
610 netif_stop_queue(qca->net_dev);
611 netif_carrier_off(qca->net_dev);
612 qcaspi_flush_tx_ring(qca);
616 if (qca->intr_svc != qca->intr_req) {
617 qca->intr_svc = qca->intr_req;
618 start_spi_intr_handling(qca, &intr_cause);
621 qcaspi_qca7k_sync(qca, QCASPI_EVENT_CPUON);
624 if (qca->frm_handle.state != qca->frm_handle.init)
625 qca->net_dev->stats.rx_dropped++;
627 qcafrm_fsm_init_spi(&qca->frm_handle);
628 qca->stats.device_reset++;
631 if (qca->sync != QCASPI_SYNC_READY)
634 netif_wake_queue(qca->net_dev);
635 netif_carrier_on(qca->net_dev);
640 netdev_dbg(qca->net_dev, "===> rdbuf error!\n");
641 qca->stats.read_buf_err++;
642 qca->sync = QCASPI_SYNC_UNKNOWN;
648 netdev_dbg(qca->net_dev, "===> wrbuf error!\n");
649 qca->stats.write_buf_err++;
650 qca->sync = QCASPI_SYNC_UNKNOWN;
657 if (qca->sync == QCASPI_SYNC_READY) {
659 qcaspi_receive(qca);
662 end_spi_intr_handling(qca, intr_cause);
665 if (qca->sync == QCASPI_SYNC_READY)
666 qcaspi_transmit(qca);
669 netdev_info(qca->net_dev, "SPI thread exit\n");
677 struct qcaspi *qca = data;
679 qca->intr_req++;
680 if (qca->spi_thread)
681 wake_up_process(qca->spi_thread);
689 struct qcaspi *qca = netdev_priv(dev);
692 if (!qca)
695 qca->intr_req = 1;
696 qca->intr_svc = 0;
697 qca->sync = QCASPI_SYNC_UNKNOWN;
698 qcafrm_fsm_init_spi(&qca->frm_handle);
700 qca->spi_thread = kthread_run((void *)qcaspi_spi_thread,
701 qca, "%s", dev->name);
703 if (IS_ERR(qca->spi_thread)) {
706 return PTR_ERR(qca->spi_thread);
709 ret = request_irq(qca->spi_dev->irq, qcaspi_intr_handler, 0,
710 dev->name, qca);
713 QCASPI_DRV_NAME, qca->spi_dev->irq, ret);
714 kthread_stop(qca->spi_thread);
726 struct qcaspi *qca = netdev_priv(dev);
730 qcaspi_write_register(qca, SPI_REG_INTR_ENABLE, 0, wr_verify);
731 free_irq(qca->spi_dev->irq, qca);
733 kthread_stop(qca->spi_thread);
734 qca->spi_thread = NULL;
735 qcaspi_flush_tx_ring(qca);
745 struct qcaspi *qca = netdev_priv(dev);
753 if (qca->txr.skb[qca->txr.tail]) {
754 netdev_warn(qca->net_dev, "queue was unexpectedly full!\n");
755 netif_stop_queue(qca->net_dev);
756 qca->stats.ring_full++;
765 qca->stats.out_of_mem++;
784 netdev_dbg(qca->net_dev, "Tx-ing packet: Size: 0x%08x\n",
787 qca->txr.size += skb->len + QCASPI_HW_PKT_LEN;
789 new_tail = qca->txr.tail + 1;
790 if (new_tail >= qca->txr.count)
793 qca->txr.skb[qca->txr.tail] = skb;
794 qca->txr.tail = new_tail;
796 if (!qcaspi_tx_ring_has_space(&qca->txr)) {
797 netif_stop_queue(qca->net_dev);
798 qca->stats.ring_full++;
803 if (qca->spi_thread)
804 wake_up_process(qca->spi_thread);
812 struct qcaspi *qca = netdev_priv(dev);
814 netdev_info(qca->net_dev, "Transmit timeout at %ld, latency %ld\n",
816 qca->net_dev->stats.tx_errors++;
818 qca->sync = QCASPI_SYNC_UNKNOWN;
820 if (qca->spi_thread)
821 wake_up_process(qca->spi_thread);
827 struct qcaspi *qca = netdev_priv(dev);
831 qca->clkspeed = qcaspi_clkspeed;
832 qca->burst_len = qcaspi_burst_len;
833 qca->spi_thread = NULL;
834 qca->buffer_size = (dev->mtu + VLAN_ETH_HLEN + QCAFRM_HEADER_LEN +
837 memset(&qca->stats, 0, sizeof(struct qcaspi_stats));
839 qca->rx_buffer = kmalloc(qca->buffer_size, GFP_KERNEL);
840 if (!qca->rx_buffer)
843 qca->rx_skb = netdev_alloc_skb_ip_align(dev, qca->net_dev->mtu +
845 if (!qca->rx_skb) {
846 kfree(qca->rx_buffer);
847 netdev_info(qca->net_dev, "Failed to allocate RX sk_buff.\n");
857 struct qcaspi *qca = netdev_priv(dev);
859 kfree(qca->rx_buffer);
860 qca->buffer_size = 0;
861 dev_kfree_skb(qca->rx_skb);
878 struct qcaspi *qca = NULL;
890 qca = netdev_priv(dev);
891 memset(qca, 0, sizeof(struct qcaspi));
893 memset(&qca->txr, 0, sizeof(qca->txr));
894 qca->txr.count = TX_RING_MAX_LEN;
898 { .compatible = "qca,qca7000" },
906 struct qcaspi *qca = NULL;
918 "qca,legacy-mode");
975 qca = netdev_priv(qcaspi_devs);
976 if (!qca) {
981 qca->net_dev = qcaspi_devs;
982 qca->spi_dev = spi;
983 qca->legacy_mode = legacy_mode;
987 ret = of_get_ethdev_address(spi->dev.of_node, qca->net_dev);
989 eth_hw_addr_random(qca->net_dev);
991 qca->net_dev->dev_addr);
994 netif_carrier_off(qca->net_dev);
997 qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
998 qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
1015 qcaspi_init_device_debugfs(qca);
1024 struct qcaspi *qca = netdev_priv(qcaspi_devs);
1026 qcaspi_remove_device_debugfs(qca);