1 /**********************************************************************
4 * Contact: support@cavium.com
5 * Please include "LiquidIO" in the subject.
7 * Copyright (c) 2003-2015 Cavium, Inc.
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT. See the GNU General Public License for more
19 * This file may also be available under a different license from Cavium.
20 * Contact Cavium, Inc. for more information
21 **********************************************************************/
22 #include <linux/version.h>
23 #include <linux/pci.h>
24 #include <linux/firmware.h>
25 #include <linux/ptp_clock_kernel.h>
26 #include <net/vxlan.h>
27 #include "liquidio_common.h"
28 #include "octeon_droq.h"
29 #include "octeon_iq.h"
30 #include "response_manager.h"
31 #include "octeon_device.h"
32 #include "octeon_nic.h"
33 #include "octeon_main.h"
34 #include "octeon_network.h"
35 #include "cn66xx_regs.h"
36 #include "cn66xx_device.h"
37 #include "cn68xx_device.h"
38 #include "cn23xx_pf_device.h"
39 #include "liquidio_image.h"
41 MODULE_AUTHOR("Cavium Networks, <support@cavium.com>");
42 MODULE_DESCRIPTION("Cavium LiquidIO Intelligent Server Adapter Driver");
43 MODULE_LICENSE("GPL");
44 MODULE_VERSION(LIQUIDIO_VERSION);
45 MODULE_FIRMWARE(LIO_FW_DIR LIO_FW_BASE_NAME LIO_210SV_NAME LIO_FW_NAME_SUFFIX);
46 MODULE_FIRMWARE(LIO_FW_DIR LIO_FW_BASE_NAME LIO_210NV_NAME LIO_FW_NAME_SUFFIX);
47 MODULE_FIRMWARE(LIO_FW_DIR LIO_FW_BASE_NAME LIO_410NV_NAME LIO_FW_NAME_SUFFIX);
49 static int ddr_timeout = 10000;
50 module_param(ddr_timeout, int, 0644);
51 MODULE_PARM_DESC(ddr_timeout,
52 "Number of milliseconds to wait for DDR initialization. 0 waits for ddr_timeout to be set to non-zero value before starting to check");
54 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
56 #define INCR_INSTRQUEUE_PKT_COUNT(octeon_dev_ptr, iq_no, field, count) \
57 (octeon_dev_ptr->instr_queue[iq_no]->stats.field += count)
59 static int debug = -1;
60 module_param(debug, int, 0644);
61 MODULE_PARM_DESC(debug, "NETIF_MSG debug bits");
63 static char fw_type[LIO_MAX_FW_TYPE_LEN];
64 module_param_string(fw_type, fw_type, sizeof(fw_type), 0000);
65 MODULE_PARM_DESC(fw_type, "Type of firmware to be loaded. Default \"nic\"");
68 module_param(conf_type, int, 0);
69 MODULE_PARM_DESC(conf_type, "select octeon configuration 0 default 1 ovs");
71 static int ptp_enable = 1;
73 /* Bit mask values for lio->ifstate */
74 #define LIO_IFSTATE_DROQ_OPS 0x01
75 #define LIO_IFSTATE_REGISTERED 0x02
76 #define LIO_IFSTATE_RUNNING 0x04
77 #define LIO_IFSTATE_RX_TIMESTAMP_ENABLED 0x08
79 /* Polling interval for determining when NIC application is alive */
80 #define LIQUIDIO_STARTER_POLL_INTERVAL_MS 100
82 /* runtime link query interval */
83 #define LIQUIDIO_LINK_QUERY_INTERVAL_MS 1000
85 struct liquidio_if_cfg_context {
93 struct liquidio_if_cfg_resp {
95 struct liquidio_if_cfg_info cfg_info;
99 struct oct_link_status_resp {
101 struct oct_link_info link_info;
105 struct oct_timestamp_resp {
111 #define OCT_TIMESTAMP_RESP_SIZE (sizeof(struct oct_timestamp_resp))
116 #ifdef __BIG_ENDIAN_BITFIELD
128 /** Octeon device properties to be used by the NIC module.
129 * Each octeon device in the system will be represented
130 * by this structure in the NIC module.
133 #define OCTNIC_MAX_SG (MAX_SKB_FRAGS)
135 #define OCTNIC_GSO_MAX_HEADER_SIZE 128
136 #define OCTNIC_GSO_MAX_SIZE \
137 (CN23XX_DEFAULT_INPUT_JABBER - OCTNIC_GSO_MAX_HEADER_SIZE)
139 /** Structure of a node in list of gather components maintained by
140 * NIC driver for each network device.
142 struct octnic_gather {
143 /** List manipulation. Next and prev pointers. */
144 struct list_head list;
146 /** Size of the gather component at sg in bytes. */
149 /** Number of bytes that sg was adjusted to make it 8B-aligned. */
152 /** Gather component that can accommodate max sized fragment list
153 * received from the IP layer.
155 struct octeon_sg_entry *sg;
161 struct completion init;
162 struct completion started;
163 struct pci_dev *pci_dev;
168 struct octeon_device_priv {
169 /** Tasklet structures for this device. */
170 struct tasklet_struct droq_tasklet;
171 unsigned long napi_mask;
174 static int octeon_device_init(struct octeon_device *);
175 static int liquidio_stop(struct net_device *netdev);
176 static void liquidio_remove(struct pci_dev *pdev);
177 static int liquidio_probe(struct pci_dev *pdev,
178 const struct pci_device_id *ent);
180 static struct handshake handshake[MAX_OCTEON_DEVICES];
181 static struct completion first_stage;
183 static void octeon_droq_bh(unsigned long pdev)
187 struct octeon_device *oct = (struct octeon_device *)pdev;
188 struct octeon_device_priv *oct_priv =
189 (struct octeon_device_priv *)oct->priv;
191 /* for (q_no = 0; q_no < oct->num_oqs; q_no++) { */
192 for (q_no = 0; q_no < MAX_OCTEON_OUTPUT_QUEUES(oct); q_no++) {
193 if (!(oct->io_qmask.oq & (1ULL << q_no)))
195 reschedule |= octeon_droq_process_packets(oct, oct->droq[q_no],
197 lio_enable_irq(oct->droq[q_no], NULL);
201 tasklet_schedule(&oct_priv->droq_tasklet);
204 static int lio_wait_for_oq_pkts(struct octeon_device *oct)
206 struct octeon_device_priv *oct_priv =
207 (struct octeon_device_priv *)oct->priv;
208 int retry = 100, pkt_cnt = 0, pending_pkts = 0;
214 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
215 if (!(oct->io_qmask.oq & (1ULL << i)))
217 pkt_cnt += octeon_droq_check_hw_for_pkts(oct->droq[i]);
220 pending_pkts += pkt_cnt;
221 tasklet_schedule(&oct_priv->droq_tasklet);
224 schedule_timeout_uninterruptible(1);
226 } while (retry-- && pending_pkts);
232 * \brief Forces all IO queues off on a given device
233 * @param oct Pointer to Octeon device
235 static void force_io_queues_off(struct octeon_device *oct)
237 if ((oct->chip_id == OCTEON_CN66XX) ||
238 (oct->chip_id == OCTEON_CN68XX)) {
239 /* Reset the Enable bits for Input Queues. */
240 octeon_write_csr(oct, CN6XXX_SLI_PKT_INSTR_ENB, 0);
242 /* Reset the Enable bits for Output Queues. */
243 octeon_write_csr(oct, CN6XXX_SLI_PKT_OUT_ENB, 0);
248 * \brief wait for all pending requests to complete
249 * @param oct Pointer to Octeon device
251 * Called during shutdown sequence
253 static int wait_for_pending_requests(struct octeon_device *oct)
257 for (i = 0; i < 100; i++) {
259 atomic_read(&oct->response_list
260 [OCTEON_ORDERED_SC_LIST].pending_req_count);
262 schedule_timeout_uninterruptible(HZ / 10);
274 * \brief Cause device to go quiet so it can be safely removed/reset/etc
275 * @param oct Pointer to Octeon device
277 static inline void pcierror_quiesce_device(struct octeon_device *oct)
281 /* Disable the input and output queues now. No more packets will
282 * arrive from Octeon, but we should wait for all packet processing
285 force_io_queues_off(oct);
287 /* To allow for in-flight requests */
288 schedule_timeout_uninterruptible(100);
290 if (wait_for_pending_requests(oct))
291 dev_err(&oct->pci_dev->dev, "There were pending requests\n");
293 /* Force all requests waiting to be fetched by OCTEON to complete. */
294 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
295 struct octeon_instr_queue *iq;
297 if (!(oct->io_qmask.iq & (1ULL << i)))
299 iq = oct->instr_queue[i];
301 if (atomic_read(&iq->instr_pending)) {
302 spin_lock_bh(&iq->lock);
304 iq->octeon_read_index = iq->host_write_index;
305 iq->stats.instr_processed +=
306 atomic_read(&iq->instr_pending);
307 lio_process_iq_request_list(oct, iq, 0);
308 spin_unlock_bh(&iq->lock);
312 /* Force all pending ordered list requests to time out. */
313 lio_process_ordered_list(oct, 1);
315 /* We do not need to wait for output queue packets to be processed. */
319 * \brief Cleanup PCI AER uncorrectable error status
320 * @param dev Pointer to PCI device
322 static void cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
327 pr_info("%s :\n", __func__);
329 pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
330 pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
331 if (dev->error_state == pci_channel_io_normal)
332 status &= ~mask; /* Clear corresponding nonfatal bits */
334 status &= mask; /* Clear corresponding fatal bits */
335 pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
339 * \brief Stop all PCI IO to a given device
340 * @param dev Pointer to Octeon device
342 static void stop_pci_io(struct octeon_device *oct)
344 /* No more instructions will be forwarded. */
345 atomic_set(&oct->status, OCT_DEV_IN_RESET);
347 pci_disable_device(oct->pci_dev);
349 /* Disable interrupts */
350 oct->fn_list.disable_interrupt(oct->chip);
352 pcierror_quiesce_device(oct);
354 /* Release the interrupt line */
355 free_irq(oct->pci_dev->irq, oct);
357 if (oct->flags & LIO_FLAG_MSI_ENABLED)
358 pci_disable_msi(oct->pci_dev);
360 dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
361 lio_get_state_string(&oct->status));
363 /* cn63xx_cleanup_aer_uncorrect_error_status(oct->pci_dev); */
364 /* making it a common function for all OCTEON models */
365 cleanup_aer_uncorrect_error_status(oct->pci_dev);
369 * \brief called when PCI error is detected
370 * @param pdev Pointer to PCI device
371 * @param state The current pci connection state
373 * This function is called after a PCI bus error affecting
374 * this device has been detected.
376 static pci_ers_result_t liquidio_pcie_error_detected(struct pci_dev *pdev,
377 pci_channel_state_t state)
379 struct octeon_device *oct = pci_get_drvdata(pdev);
381 /* Non-correctable Non-fatal errors */
382 if (state == pci_channel_io_normal) {
383 dev_err(&oct->pci_dev->dev, "Non-correctable non-fatal error reported:\n");
384 cleanup_aer_uncorrect_error_status(oct->pci_dev);
385 return PCI_ERS_RESULT_CAN_RECOVER;
388 /* Non-correctable Fatal errors */
389 dev_err(&oct->pci_dev->dev, "Non-correctable FATAL reported by PCI AER driver\n");
392 /* Always return a DISCONNECT. There is no support for recovery but only
393 * for a clean shutdown.
395 return PCI_ERS_RESULT_DISCONNECT;
399 * \brief mmio handler
400 * @param pdev Pointer to PCI device
402 static pci_ers_result_t liquidio_pcie_mmio_enabled(
403 struct pci_dev *pdev __attribute__((unused)))
405 /* We should never hit this since we never ask for a reset for a Fatal
406 * Error. We always return DISCONNECT in io_error above.
407 * But play safe and return RECOVERED for now.
409 return PCI_ERS_RESULT_RECOVERED;
413 * \brief called after the pci bus has been reset.
414 * @param pdev Pointer to PCI device
416 * Restart the card from scratch, as if from a cold-boot. Implementation
417 * resembles the first-half of the octeon_resume routine.
419 static pci_ers_result_t liquidio_pcie_slot_reset(
420 struct pci_dev *pdev __attribute__((unused)))
422 /* We should never hit this since we never ask for a reset for a Fatal
423 * Error. We always return DISCONNECT in io_error above.
424 * But play safe and return RECOVERED for now.
426 return PCI_ERS_RESULT_RECOVERED;
430 * \brief called when traffic can start flowing again.
431 * @param pdev Pointer to PCI device
433 * This callback is called when the error recovery driver tells us that
434 * its OK to resume normal operation. Implementation resembles the
435 * second-half of the octeon_resume routine.
437 static void liquidio_pcie_resume(struct pci_dev *pdev __attribute__((unused)))
439 /* Nothing to be done here. */
444 * \brief called when suspending
445 * @param pdev Pointer to PCI device
446 * @param state state to suspend to
448 static int liquidio_suspend(struct pci_dev *pdev __attribute__((unused)),
449 pm_message_t state __attribute__((unused)))
455 * \brief called when resuming
456 * @param pdev Pointer to PCI device
458 static int liquidio_resume(struct pci_dev *pdev __attribute__((unused)))
464 /* For PCI-E Advanced Error Recovery (AER) Interface */
465 static const struct pci_error_handlers liquidio_err_handler = {
466 .error_detected = liquidio_pcie_error_detected,
467 .mmio_enabled = liquidio_pcie_mmio_enabled,
468 .slot_reset = liquidio_pcie_slot_reset,
469 .resume = liquidio_pcie_resume,
472 static const struct pci_device_id liquidio_pci_tbl[] = {
474 PCI_VENDOR_ID_CAVIUM, 0x91, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
477 PCI_VENDOR_ID_CAVIUM, 0x92, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
480 PCI_VENDOR_ID_CAVIUM, 0x9702, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
486 MODULE_DEVICE_TABLE(pci, liquidio_pci_tbl);
488 static struct pci_driver liquidio_pci_driver = {
490 .id_table = liquidio_pci_tbl,
491 .probe = liquidio_probe,
492 .remove = liquidio_remove,
493 .err_handler = &liquidio_err_handler, /* For AER */
496 .suspend = liquidio_suspend,
497 .resume = liquidio_resume,
502 * \brief register PCI driver
504 static int liquidio_init_pci(void)
506 return pci_register_driver(&liquidio_pci_driver);
510 * \brief unregister PCI driver
512 static void liquidio_deinit_pci(void)
514 pci_unregister_driver(&liquidio_pci_driver);
518 * \brief check interface state
519 * @param lio per-network private data
520 * @param state_flag flag state to check
522 static inline int ifstate_check(struct lio *lio, int state_flag)
524 return atomic_read(&lio->ifstate) & state_flag;
528 * \brief set interface state
529 * @param lio per-network private data
530 * @param state_flag flag state to set
532 static inline void ifstate_set(struct lio *lio, int state_flag)
534 atomic_set(&lio->ifstate, (atomic_read(&lio->ifstate) | state_flag));
538 * \brief clear interface state
539 * @param lio per-network private data
540 * @param state_flag flag state to clear
542 static inline void ifstate_reset(struct lio *lio, int state_flag)
544 atomic_set(&lio->ifstate, (atomic_read(&lio->ifstate) & ~(state_flag)));
548 * \brief Stop Tx queues
549 * @param netdev network device
551 static inline void txqs_stop(struct net_device *netdev)
553 if (netif_is_multiqueue(netdev)) {
556 for (i = 0; i < netdev->num_tx_queues; i++)
557 netif_stop_subqueue(netdev, i);
559 netif_stop_queue(netdev);
564 * \brief Start Tx queues
565 * @param netdev network device
567 static inline void txqs_start(struct net_device *netdev)
569 if (netif_is_multiqueue(netdev)) {
572 for (i = 0; i < netdev->num_tx_queues; i++)
573 netif_start_subqueue(netdev, i);
575 netif_start_queue(netdev);
580 * \brief Wake Tx queues
581 * @param netdev network device
583 static inline void txqs_wake(struct net_device *netdev)
585 struct lio *lio = GET_LIO(netdev);
587 if (netif_is_multiqueue(netdev)) {
590 for (i = 0; i < netdev->num_tx_queues; i++) {
591 int qno = lio->linfo.txpciq[i %
592 (lio->linfo.num_txpciq)].s.q_no;
594 if (__netif_subqueue_stopped(netdev, i)) {
595 INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, qno,
597 netif_wake_subqueue(netdev, i);
601 INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, lio->txq,
603 netif_wake_queue(netdev);
608 * \brief Stop Tx queue
609 * @param netdev network device
611 static void stop_txq(struct net_device *netdev)
617 * \brief Start Tx queue
618 * @param netdev network device
620 static void start_txq(struct net_device *netdev)
622 struct lio *lio = GET_LIO(netdev);
624 if (lio->linfo.link.s.link_up) {
631 * \brief Wake a queue
632 * @param netdev network device
633 * @param q which queue to wake
635 static inline void wake_q(struct net_device *netdev, int q)
637 if (netif_is_multiqueue(netdev))
638 netif_wake_subqueue(netdev, q);
640 netif_wake_queue(netdev);
644 * \brief Stop a queue
645 * @param netdev network device
646 * @param q which queue to stop
648 static inline void stop_q(struct net_device *netdev, int q)
650 if (netif_is_multiqueue(netdev))
651 netif_stop_subqueue(netdev, q);
653 netif_stop_queue(netdev);
657 * \brief Check Tx queue status, and take appropriate action
658 * @param lio per-network private data
659 * @returns 0 if full, number of queues woken up otherwise
661 static inline int check_txq_status(struct lio *lio)
665 if (netif_is_multiqueue(lio->netdev)) {
666 int numqs = lio->netdev->num_tx_queues;
669 /* check each sub-queue state */
670 for (q = 0; q < numqs; q++) {
671 iq = lio->linfo.txpciq[q %
672 (lio->linfo.num_txpciq)].s.q_no;
673 if (octnet_iq_is_full(lio->oct_dev, iq))
675 if (__netif_subqueue_stopped(lio->netdev, q)) {
676 wake_q(lio->netdev, q);
677 INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, iq,
683 if (octnet_iq_is_full(lio->oct_dev, lio->txq))
685 wake_q(lio->netdev, lio->txq);
686 INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, lio->txq,
694 * Remove the node at the head of the list. The list would be empty at
695 * the end of this call if there are no more nodes in the list.
697 static inline struct list_head *list_delete_head(struct list_head *root)
699 struct list_head *node;
701 if ((root->prev == root) && (root->next == root))
713 * \brief Delete gather lists
714 * @param lio per-network private data
716 static void delete_glists(struct lio *lio)
718 struct octnic_gather *g;
724 for (i = 0; i < lio->linfo.num_txpciq; i++) {
726 g = (struct octnic_gather *)
727 list_delete_head(&lio->glist[i]);
730 dma_unmap_single(&lio->oct_dev->
735 kfree((void *)((unsigned long)g->sg -
743 kfree((void *)lio->glist);
747 * \brief Setup gather lists
748 * @param lio per-network private data
750 static int setup_glists(struct octeon_device *oct, struct lio *lio, int num_iqs)
753 struct octnic_gather *g;
755 lio->glist_lock = kcalloc(num_iqs, sizeof(*lio->glist_lock),
757 if (!lio->glist_lock)
760 lio->glist = kcalloc(num_iqs, sizeof(*lio->glist),
763 kfree((void *)lio->glist_lock);
767 for (i = 0; i < num_iqs; i++) {
768 int numa_node = cpu_to_node(i % num_online_cpus());
770 spin_lock_init(&lio->glist_lock[i]);
772 INIT_LIST_HEAD(&lio->glist[i]);
774 for (j = 0; j < lio->tx_qsize; j++) {
775 g = kzalloc_node(sizeof(*g), GFP_KERNEL,
778 g = kzalloc(sizeof(*g), GFP_KERNEL);
782 g->sg_size = ((ROUNDUP4(OCTNIC_MAX_SG) >> 2) *
785 g->sg = kmalloc_node(g->sg_size + 8,
786 GFP_KERNEL, numa_node);
788 g->sg = kmalloc(g->sg_size + 8, GFP_KERNEL);
794 /* The gather component should be aligned on 64-bit
797 if (((unsigned long)g->sg) & 7) {
798 g->adjust = 8 - (((unsigned long)g->sg) & 7);
799 g->sg = (struct octeon_sg_entry *)
800 ((unsigned long)g->sg + g->adjust);
802 g->sg_dma_ptr = dma_map_single(&oct->pci_dev->dev,
805 if (dma_mapping_error(&oct->pci_dev->dev,
807 kfree((void *)((unsigned long)g->sg -
813 list_add_tail(&g->list, &lio->glist[i]);
816 if (j != lio->tx_qsize) {
826 * \brief Print link information
827 * @param netdev network device
829 static void print_link_info(struct net_device *netdev)
831 struct lio *lio = GET_LIO(netdev);
833 if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED) {
834 struct oct_link_info *linfo = &lio->linfo;
836 if (linfo->link.s.link_up) {
837 netif_info(lio, link, lio->netdev, "%d Mbps %s Duplex UP\n",
839 (linfo->link.s.duplex) ? "Full" : "Half");
841 netif_info(lio, link, lio->netdev, "Link Down\n");
847 * \brief Update link status
848 * @param netdev network device
849 * @param ls link status structure
851 * Called on receipt of a link status response from the core application to
852 * update each interface's link status.
854 static inline void update_link_status(struct net_device *netdev,
855 union oct_link_status *ls)
857 struct lio *lio = GET_LIO(netdev);
858 int changed = (lio->linfo.link.u64 != ls->u64);
860 lio->linfo.link.u64 = ls->u64;
862 if ((lio->intf_open) && (changed)) {
863 print_link_info(netdev);
866 if (lio->linfo.link.s.link_up) {
867 netif_carrier_on(netdev);
868 /* start_txq(netdev); */
871 netif_carrier_off(netdev);
877 /* Runs in interrupt context. */
878 static void update_txq_status(struct octeon_device *oct, int iq_num)
880 struct net_device *netdev;
882 struct octeon_instr_queue *iq = oct->instr_queue[iq_num];
884 /*octeon_update_iq_read_idx(oct, iq);*/
886 netdev = oct->props[iq->ifidx].netdev;
888 /* This is needed because the first IQ does not have
889 * a netdev associated with it.
894 lio = GET_LIO(netdev);
895 if (netif_is_multiqueue(netdev)) {
896 if (__netif_subqueue_stopped(netdev, iq->q_index) &&
897 lio->linfo.link.s.link_up &&
898 (!octnet_iq_is_full(oct, iq_num))) {
899 INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, iq_num,
901 netif_wake_subqueue(netdev, iq->q_index);
903 if (!octnet_iq_is_full(oct, lio->txq)) {
904 INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev,
907 wake_q(netdev, lio->txq);
914 * \brief Droq packet processor sceduler
915 * @param oct octeon device
918 void liquidio_schedule_droq_pkt_handlers(struct octeon_device *oct)
920 struct octeon_device_priv *oct_priv =
921 (struct octeon_device_priv *)oct->priv;
923 struct octeon_droq *droq;
925 if (oct->int_status & OCT_DEV_INTR_PKT_DATA) {
926 for (oq_no = 0; oq_no < MAX_OCTEON_OUTPUT_QUEUES(oct);
928 if (!(oct->droq_intr & (1ULL << oq_no)))
931 droq = oct->droq[oq_no];
933 if (droq->ops.poll_mode) {
934 droq->ops.napi_fn(droq);
935 oct_priv->napi_mask |= (1 << oq_no);
937 tasklet_schedule(&oct_priv->droq_tasklet);
944 * \brief Interrupt handler for octeon
946 * @param dev octeon device
949 irqreturn_t liquidio_intr_handler(int irq __attribute__((unused)), void *dev)
951 struct octeon_device *oct = (struct octeon_device *)dev;
954 /* Disable our interrupts for the duration of ISR */
955 oct->fn_list.disable_interrupt(oct->chip);
957 ret = oct->fn_list.process_interrupt_regs(oct);
959 if (ret == IRQ_HANDLED)
960 liquidio_schedule_droq_pkt_handlers(oct);
962 /* Re-enable our interrupts */
963 if (!(atomic_read(&oct->status) == OCT_DEV_IN_RESET))
964 oct->fn_list.enable_interrupt(oct->chip);
970 * \brief Setup interrupt for octeon device
971 * @param oct octeon device
973 * Enable interrupt in Octeon device as given in the PCI interrupt mask.
975 static int octeon_setup_interrupt(struct octeon_device *oct)
979 err = pci_enable_msi(oct->pci_dev);
981 dev_warn(&oct->pci_dev->dev, "Reverting to legacy interrupts. Error: %d\n",
984 oct->flags |= LIO_FLAG_MSI_ENABLED;
986 irqret = request_irq(oct->pci_dev->irq, liquidio_intr_handler,
987 IRQF_SHARED, "octeon", oct);
989 if (oct->flags & LIO_FLAG_MSI_ENABLED)
990 pci_disable_msi(oct->pci_dev);
991 dev_err(&oct->pci_dev->dev, "Request IRQ failed with code: %d\n",
1000 * \brief PCI probe handler
1001 * @param pdev PCI device structure
1005 liquidio_probe(struct pci_dev *pdev,
1006 const struct pci_device_id *ent __attribute__((unused)))
1008 struct octeon_device *oct_dev = NULL;
1009 struct handshake *hs;
1011 oct_dev = octeon_allocate_device(pdev->device,
1012 sizeof(struct octeon_device_priv));
1014 dev_err(&pdev->dev, "Unable to allocate device\n");
1018 dev_info(&pdev->dev, "Initializing device %x:%x.\n",
1019 (u32)pdev->vendor, (u32)pdev->device);
1021 /* Assign octeon_device for this device to the private data area. */
1022 pci_set_drvdata(pdev, oct_dev);
1024 /* set linux specific device pointer */
1025 oct_dev->pci_dev = (void *)pdev;
1027 hs = &handshake[oct_dev->octeon_id];
1028 init_completion(&hs->init);
1029 init_completion(&hs->started);
1032 if (oct_dev->octeon_id == 0)
1033 /* first LiquidIO NIC is detected */
1034 complete(&first_stage);
1036 if (octeon_device_init(oct_dev)) {
1037 liquidio_remove(pdev);
1041 oct_dev->rx_pause = 1;
1042 oct_dev->tx_pause = 1;
1044 dev_dbg(&oct_dev->pci_dev->dev, "Device is ready\n");
1050 *\brief Destroy resources associated with octeon device
1051 * @param pdev PCI device structure
1054 static void octeon_destroy_resources(struct octeon_device *oct)
1057 struct octeon_device_priv *oct_priv =
1058 (struct octeon_device_priv *)oct->priv;
1060 struct handshake *hs;
1062 switch (atomic_read(&oct->status)) {
1063 case OCT_DEV_RUNNING:
1064 case OCT_DEV_CORE_OK:
1066 /* No more instructions will be forwarded. */
1067 atomic_set(&oct->status, OCT_DEV_IN_RESET);
1069 oct->app_mode = CVM_DRV_INVALID_APP;
1070 dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
1071 lio_get_state_string(&oct->status));
1073 schedule_timeout_uninterruptible(HZ / 10);
1076 case OCT_DEV_HOST_OK:
1079 case OCT_DEV_CONSOLE_INIT_DONE:
1080 /* Remove any consoles */
1081 octeon_remove_consoles(oct);
1084 case OCT_DEV_IO_QUEUES_DONE:
1085 if (wait_for_pending_requests(oct))
1086 dev_err(&oct->pci_dev->dev, "There were pending requests\n");
1088 if (lio_wait_for_instr_fetch(oct))
1089 dev_err(&oct->pci_dev->dev, "IQ had pending instructions\n");
1091 /* Disable the input and output queues now. No more packets will
1092 * arrive from Octeon, but we should wait for all packet
1093 * processing to finish.
1095 oct->fn_list.disable_io_queues(oct);
1097 if (lio_wait_for_oq_pkts(oct))
1098 dev_err(&oct->pci_dev->dev, "OQ had pending packets\n");
1100 /* Disable interrupts */
1101 oct->fn_list.disable_interrupt(oct->chip);
1103 /* Release the interrupt line */
1104 free_irq(oct->pci_dev->irq, oct);
1106 if (oct->flags & LIO_FLAG_MSI_ENABLED)
1107 pci_disable_msi(oct->pci_dev);
1110 case OCT_DEV_IN_RESET:
1111 case OCT_DEV_DROQ_INIT_DONE:
1112 /*atomic_set(&oct->status, OCT_DEV_DROQ_INIT_DONE);*/
1114 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
1115 if (!(oct->io_qmask.oq & (1ULL << i)))
1117 octeon_delete_droq(oct, i);
1120 /* Force any pending handshakes to complete */
1121 for (i = 0; i < MAX_OCTEON_DEVICES; i++) {
1125 handshake[oct->octeon_id].init_ok = 0;
1126 complete(&handshake[oct->octeon_id].init);
1127 handshake[oct->octeon_id].started_ok = 0;
1128 complete(&handshake[oct->octeon_id].started);
1133 case OCT_DEV_RESP_LIST_INIT_DONE:
1134 octeon_delete_response_list(oct);
1137 case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
1138 octeon_free_sc_buffer_pool(oct);
1141 case OCT_DEV_INSTR_QUEUE_INIT_DONE:
1142 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
1143 if (!(oct->io_qmask.iq & (1ULL << i)))
1145 octeon_delete_instr_queue(oct, i);
1149 case OCT_DEV_DISPATCH_INIT_DONE:
1150 octeon_delete_dispatch_list(oct);
1151 cancel_delayed_work_sync(&oct->nic_poll_work.work);
1154 case OCT_DEV_PCI_MAP_DONE:
1156 /* Soft reset the octeon device before exiting */
1157 oct->fn_list.soft_reset(oct);
1159 octeon_unmap_pci_barx(oct, 0);
1160 octeon_unmap_pci_barx(oct, 1);
1163 case OCT_DEV_BEGIN_STATE:
1164 /* Disable the device, releasing the PCI INT */
1165 pci_disable_device(oct->pci_dev);
1167 /* Nothing to be done here either */
1169 } /* end switch (oct->status) */
1171 tasklet_kill(&oct_priv->droq_tasklet);
1175 * \brief Send Rx control command
1176 * @param lio per-network private data
1177 * @param start_stop whether to start or stop
1179 static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
1181 struct octnic_ctrl_pkt nctrl;
1183 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1185 nctrl.ncmd.s.cmd = OCTNET_CMD_RX_CTL;
1186 nctrl.ncmd.s.param1 = start_stop;
1187 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1188 nctrl.netpndev = (u64)lio->netdev;
1190 if (octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl) < 0)
1191 netif_info(lio, rx_err, lio->netdev, "Failed to send RX Control message\n");
1195 * \brief Destroy NIC device interface
1196 * @param oct octeon device
1197 * @param ifidx which interface to destroy
1199 * Cleanup associated with each interface for an Octeon device when NIC
1200 * module is being unloaded or if initialization fails during load.
1202 static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
1204 struct net_device *netdev = oct->props[ifidx].netdev;
1206 struct napi_struct *napi, *n;
1209 dev_err(&oct->pci_dev->dev, "%s No netdevice ptr for index %d\n",
1214 lio = GET_LIO(netdev);
1216 dev_dbg(&oct->pci_dev->dev, "NIC device cleanup\n");
1218 send_rx_ctrl_cmd(lio, 0);
1220 if (atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING)
1223 if (oct->props[lio->ifidx].napi_enabled == 1) {
1224 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
1227 oct->props[lio->ifidx].napi_enabled = 0;
1230 if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
1231 unregister_netdev(netdev);
1235 free_netdev(netdev);
1237 oct->props[ifidx].gmxport = -1;
1239 oct->props[ifidx].netdev = NULL;
1243 * \brief Stop complete NIC functionality
1244 * @param oct octeon device
1246 static int liquidio_stop_nic_module(struct octeon_device *oct)
1251 dev_dbg(&oct->pci_dev->dev, "Stopping network interfaces\n");
1252 if (!oct->ifcount) {
1253 dev_err(&oct->pci_dev->dev, "Init for Octeon was not completed\n");
1257 spin_lock_bh(&oct->cmd_resp_wqlock);
1258 oct->cmd_resp_state = OCT_DRV_OFFLINE;
1259 spin_unlock_bh(&oct->cmd_resp_wqlock);
1261 for (i = 0; i < oct->ifcount; i++) {
1262 lio = GET_LIO(oct->props[i].netdev);
1263 for (j = 0; j < lio->linfo.num_rxpciq; j++)
1264 octeon_unregister_droq_ops(oct,
1265 lio->linfo.rxpciq[j].s.q_no);
1268 for (i = 0; i < oct->ifcount; i++)
1269 liquidio_destroy_nic_device(oct, i);
1271 dev_dbg(&oct->pci_dev->dev, "Network interfaces stopped\n");
1276 * \brief Cleans up resources at unload time
1277 * @param pdev PCI device structure
1279 static void liquidio_remove(struct pci_dev *pdev)
1281 struct octeon_device *oct_dev = pci_get_drvdata(pdev);
1283 dev_dbg(&oct_dev->pci_dev->dev, "Stopping device\n");
1285 if (oct_dev->app_mode && (oct_dev->app_mode == CVM_DRV_NIC_APP))
1286 liquidio_stop_nic_module(oct_dev);
1288 /* Reset the octeon device and cleanup all memory allocated for
1289 * the octeon device by driver.
1291 octeon_destroy_resources(oct_dev);
1293 dev_info(&oct_dev->pci_dev->dev, "Device removed\n");
1295 /* This octeon device has been removed. Update the global
1296 * data structure to reflect this. Free the device structure.
1298 octeon_free_device_mem(oct_dev);
1302 * \brief Identify the Octeon device and to map the BAR address space
1303 * @param oct octeon device
1305 static int octeon_chip_specific_setup(struct octeon_device *oct)
1311 pci_read_config_dword(oct->pci_dev, 0, &dev_id);
1312 pci_read_config_dword(oct->pci_dev, 8, &rev_id);
1313 oct->rev_id = rev_id & 0xff;
1316 case OCTEON_CN68XX_PCIID:
1317 oct->chip_id = OCTEON_CN68XX;
1318 ret = lio_setup_cn68xx_octeon_device(oct);
1322 case OCTEON_CN66XX_PCIID:
1323 oct->chip_id = OCTEON_CN66XX;
1324 ret = lio_setup_cn66xx_octeon_device(oct);
1328 case OCTEON_CN23XX_PCIID_PF:
1329 oct->chip_id = OCTEON_CN23XX_PF_VID;
1330 ret = setup_cn23xx_octeon_pf_device(oct);
1336 dev_err(&oct->pci_dev->dev, "Unknown device found (dev_id: %x)\n",
1341 dev_info(&oct->pci_dev->dev, "%s PASS%d.%d %s Version: %s\n", s,
1342 OCTEON_MAJOR_REV(oct),
1343 OCTEON_MINOR_REV(oct),
1344 octeon_get_conf(oct)->card_name,
1351 * \brief PCI initialization for each Octeon device.
1352 * @param oct octeon device
1354 static int octeon_pci_os_setup(struct octeon_device *oct)
1356 /* setup PCI stuff first */
1357 if (pci_enable_device(oct->pci_dev)) {
1358 dev_err(&oct->pci_dev->dev, "pci_enable_device failed\n");
1362 if (dma_set_mask_and_coherent(&oct->pci_dev->dev, DMA_BIT_MASK(64))) {
1363 dev_err(&oct->pci_dev->dev, "Unexpected DMA device capability\n");
1367 /* Enable PCI DMA Master. */
1368 pci_set_master(oct->pci_dev);
1373 static inline int skb_iq(struct lio *lio, struct sk_buff *skb)
1377 if (netif_is_multiqueue(lio->netdev))
1378 q = skb->queue_mapping % lio->linfo.num_txpciq;
1384 * \brief Check Tx queue state for a given network buffer
1385 * @param lio per-network private data
1386 * @param skb network buffer
1388 static inline int check_txq_state(struct lio *lio, struct sk_buff *skb)
1392 if (netif_is_multiqueue(lio->netdev)) {
1393 q = skb->queue_mapping;
1394 iq = lio->linfo.txpciq[(q % (lio->linfo.num_txpciq))].s.q_no;
1400 if (octnet_iq_is_full(lio->oct_dev, iq))
1403 if (__netif_subqueue_stopped(lio->netdev, q)) {
1404 INCR_INSTRQUEUE_PKT_COUNT(lio->oct_dev, iq, tx_restart, 1);
1405 wake_q(lio->netdev, q);
1411 * \brief Unmap and free network buffer
1414 static void free_netbuf(void *buf)
1416 struct sk_buff *skb;
1417 struct octnet_buf_free_info *finfo;
1420 finfo = (struct octnet_buf_free_info *)buf;
1424 dma_unmap_single(&lio->oct_dev->pci_dev->dev, finfo->dptr, skb->len,
1427 check_txq_state(lio, skb);
1429 tx_buffer_free(skb);
1433 * \brief Unmap and free gather buffer
1436 static void free_netsgbuf(void *buf)
1438 struct octnet_buf_free_info *finfo;
1439 struct sk_buff *skb;
1441 struct octnic_gather *g;
1444 finfo = (struct octnet_buf_free_info *)buf;
1448 frags = skb_shinfo(skb)->nr_frags;
1450 dma_unmap_single(&lio->oct_dev->pci_dev->dev,
1451 g->sg[0].ptr[0], (skb->len - skb->data_len),
1456 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i - 1];
1458 pci_unmap_page((lio->oct_dev)->pci_dev,
1459 g->sg[(i >> 2)].ptr[(i & 3)],
1460 frag->size, DMA_TO_DEVICE);
1464 dma_sync_single_for_cpu(&lio->oct_dev->pci_dev->dev,
1465 g->sg_dma_ptr, g->sg_size, DMA_TO_DEVICE);
1467 iq = skb_iq(lio, skb);
1468 spin_lock(&lio->glist_lock[iq]);
1469 list_add_tail(&g->list, &lio->glist[iq]);
1470 spin_unlock(&lio->glist_lock[iq]);
1472 check_txq_state(lio, skb); /* mq support: sub-queue state check */
1474 tx_buffer_free(skb);
1478 * \brief Unmap and free gather buffer with response
1481 static void free_netsgbuf_with_resp(void *buf)
1483 struct octeon_soft_command *sc;
1484 struct octnet_buf_free_info *finfo;
1485 struct sk_buff *skb;
1487 struct octnic_gather *g;
1490 sc = (struct octeon_soft_command *)buf;
1491 skb = (struct sk_buff *)sc->callback_arg;
1492 finfo = (struct octnet_buf_free_info *)&skb->cb;
1496 frags = skb_shinfo(skb)->nr_frags;
1498 dma_unmap_single(&lio->oct_dev->pci_dev->dev,
1499 g->sg[0].ptr[0], (skb->len - skb->data_len),
1504 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i - 1];
1506 pci_unmap_page((lio->oct_dev)->pci_dev,
1507 g->sg[(i >> 2)].ptr[(i & 3)],
1508 frag->size, DMA_TO_DEVICE);
1512 dma_sync_single_for_cpu(&lio->oct_dev->pci_dev->dev,
1513 g->sg_dma_ptr, g->sg_size, DMA_TO_DEVICE);
1515 iq = skb_iq(lio, skb);
1517 spin_lock(&lio->glist_lock[iq]);
1518 list_add_tail(&g->list, &lio->glist[iq]);
1519 spin_unlock(&lio->glist_lock[iq]);
1521 /* Don't free the skb yet */
1523 check_txq_state(lio, skb);
1527 * \brief Adjust ptp frequency
1528 * @param ptp PTP clock info
1529 * @param ppb how much to adjust by, in parts-per-billion
1531 static int liquidio_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
1533 struct lio *lio = container_of(ptp, struct lio, ptp_info);
1534 struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
1536 unsigned long flags;
1537 bool neg_adj = false;
1544 /* The hardware adds the clock compensation value to the
1545 * PTP clock on every coprocessor clock cycle, so we
1546 * compute the delta in terms of coprocessor clocks.
1548 delta = (u64)ppb << 32;
1549 do_div(delta, oct->coproc_clock_rate);
1551 spin_lock_irqsave(&lio->ptp_lock, flags);
1552 comp = lio_pci_readq(oct, CN6XXX_MIO_PTP_CLOCK_COMP);
1557 lio_pci_writeq(oct, comp, CN6XXX_MIO_PTP_CLOCK_COMP);
1558 spin_unlock_irqrestore(&lio->ptp_lock, flags);
1564 * \brief Adjust ptp time
1565 * @param ptp PTP clock info
1566 * @param delta how much to adjust by, in nanosecs
1568 static int liquidio_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
1570 unsigned long flags;
1571 struct lio *lio = container_of(ptp, struct lio, ptp_info);
1573 spin_lock_irqsave(&lio->ptp_lock, flags);
1574 lio->ptp_adjust += delta;
1575 spin_unlock_irqrestore(&lio->ptp_lock, flags);
1581 * \brief Get hardware clock time, including any adjustment
1582 * @param ptp PTP clock info
1583 * @param ts timespec
1585 static int liquidio_ptp_gettime(struct ptp_clock_info *ptp,
1586 struct timespec64 *ts)
1589 unsigned long flags;
1590 struct lio *lio = container_of(ptp, struct lio, ptp_info);
1591 struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
1593 spin_lock_irqsave(&lio->ptp_lock, flags);
1594 ns = lio_pci_readq(oct, CN6XXX_MIO_PTP_CLOCK_HI);
1595 ns += lio->ptp_adjust;
1596 spin_unlock_irqrestore(&lio->ptp_lock, flags);
1598 *ts = ns_to_timespec64(ns);
1604 * \brief Set hardware clock time. Reset adjustment
1605 * @param ptp PTP clock info
1606 * @param ts timespec
1608 static int liquidio_ptp_settime(struct ptp_clock_info *ptp,
1609 const struct timespec64 *ts)
1612 unsigned long flags;
1613 struct lio *lio = container_of(ptp, struct lio, ptp_info);
1614 struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
1616 ns = timespec_to_ns(ts);
1618 spin_lock_irqsave(&lio->ptp_lock, flags);
1619 lio_pci_writeq(oct, ns, CN6XXX_MIO_PTP_CLOCK_HI);
1620 lio->ptp_adjust = 0;
1621 spin_unlock_irqrestore(&lio->ptp_lock, flags);
1627 * \brief Check if PTP is enabled
1628 * @param ptp PTP clock info
1630 * @param on is it on
1633 liquidio_ptp_enable(struct ptp_clock_info *ptp __attribute__((unused)),
1634 struct ptp_clock_request *rq __attribute__((unused)),
1635 int on __attribute__((unused)))
1641 * \brief Open PTP clock source
1642 * @param netdev network device
1644 static void oct_ptp_open(struct net_device *netdev)
1646 struct lio *lio = GET_LIO(netdev);
1647 struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
1649 spin_lock_init(&lio->ptp_lock);
1651 snprintf(lio->ptp_info.name, 16, "%s", netdev->name);
1652 lio->ptp_info.owner = THIS_MODULE;
1653 lio->ptp_info.max_adj = 250000000;
1654 lio->ptp_info.n_alarm = 0;
1655 lio->ptp_info.n_ext_ts = 0;
1656 lio->ptp_info.n_per_out = 0;
1657 lio->ptp_info.pps = 0;
1658 lio->ptp_info.adjfreq = liquidio_ptp_adjfreq;
1659 lio->ptp_info.adjtime = liquidio_ptp_adjtime;
1660 lio->ptp_info.gettime64 = liquidio_ptp_gettime;
1661 lio->ptp_info.settime64 = liquidio_ptp_settime;
1662 lio->ptp_info.enable = liquidio_ptp_enable;
1664 lio->ptp_adjust = 0;
1666 lio->ptp_clock = ptp_clock_register(&lio->ptp_info,
1667 &oct->pci_dev->dev);
1669 if (IS_ERR(lio->ptp_clock))
1670 lio->ptp_clock = NULL;
1674 * \brief Init PTP clock
1675 * @param oct octeon device
1677 static void liquidio_ptp_init(struct octeon_device *oct)
1679 u64 clock_comp, cfg;
1681 clock_comp = (u64)NSEC_PER_SEC << 32;
1682 do_div(clock_comp, oct->coproc_clock_rate);
1683 lio_pci_writeq(oct, clock_comp, CN6XXX_MIO_PTP_CLOCK_COMP);
1686 cfg = lio_pci_readq(oct, CN6XXX_MIO_PTP_CLOCK_CFG);
1687 lio_pci_writeq(oct, cfg | 0x01, CN6XXX_MIO_PTP_CLOCK_CFG);
1691 * \brief Load firmware to device
1692 * @param oct octeon device
1694 * Maps device to firmware filename, requests firmware, and downloads it
1696 static int load_firmware(struct octeon_device *oct)
1699 const struct firmware *fw;
1700 char fw_name[LIO_MAX_FW_FILENAME_LEN];
1703 if (strncmp(fw_type, LIO_FW_NAME_TYPE_NONE,
1704 sizeof(LIO_FW_NAME_TYPE_NONE)) == 0) {
1705 dev_info(&oct->pci_dev->dev, "Skipping firmware load\n");
1709 if (fw_type[0] == '\0')
1710 tmp_fw_type = LIO_FW_NAME_TYPE_NIC;
1712 tmp_fw_type = fw_type;
1714 sprintf(fw_name, "%s%s%s_%s%s", LIO_FW_DIR, LIO_FW_BASE_NAME,
1715 octeon_get_conf(oct)->card_name, tmp_fw_type,
1716 LIO_FW_NAME_SUFFIX);
1718 ret = request_firmware(&fw, fw_name, &oct->pci_dev->dev);
1720 dev_err(&oct->pci_dev->dev, "Request firmware failed. Could not find file %s.\n.",
1722 release_firmware(fw);
1726 ret = octeon_download_firmware(oct, fw->data, fw->size);
1728 release_firmware(fw);
1734 * \brief Setup output queue
1735 * @param oct octeon device
1736 * @param q_no which queue
1737 * @param num_descs how many descriptors
1738 * @param desc_size size of each descriptor
1739 * @param app_ctx application context
1741 static int octeon_setup_droq(struct octeon_device *oct, int q_no, int num_descs,
1742 int desc_size, void *app_ctx)
1746 dev_dbg(&oct->pci_dev->dev, "Creating Droq: %d\n", q_no);
1747 /* droq creation and local register settings. */
1748 ret_val = octeon_create_droq(oct, q_no, num_descs, desc_size, app_ctx);
1753 dev_dbg(&oct->pci_dev->dev, "Using default droq %d\n", q_no);
1756 /* tasklet creation for the droq */
1758 /* Enable the droq queues */
1759 octeon_set_droq_pkt_op(oct, q_no, 1);
1761 /* Send Credit for Octeon Output queues. Credits are always
1762 * sent after the output queue is enabled.
1764 writel(oct->droq[q_no]->max_count,
1765 oct->droq[q_no]->pkts_credit_reg);
1771 * \brief Callback for getting interface configuration
1772 * @param status status of request
1773 * @param buf pointer to resp structure
1775 static void if_cfg_callback(struct octeon_device *oct,
1776 u32 status __attribute__((unused)),
1779 struct octeon_soft_command *sc = (struct octeon_soft_command *)buf;
1780 struct liquidio_if_cfg_resp *resp;
1781 struct liquidio_if_cfg_context *ctx;
1783 resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
1784 ctx = (struct liquidio_if_cfg_context *)sc->ctxptr;
1786 oct = lio_get_device(ctx->octeon_id);
1788 dev_err(&oct->pci_dev->dev, "nic if cfg instruction failed. Status: %llx\n",
1789 CVM_CAST64(resp->status));
1790 WRITE_ONCE(ctx->cond, 1);
1792 snprintf(oct->fw_info.liquidio_firmware_version, 32, "%s",
1793 resp->cfg_info.liquidio_firmware_version);
1795 /* This barrier is required to be sure that the response has been
1796 * written fully before waking up the handler
1800 wake_up_interruptible(&ctx->wc);
1804 * \brief Select queue based on hash
1805 * @param dev Net device
1806 * @param skb sk_buff structure
1807 * @returns selected queue number
1809 static u16 select_q(struct net_device *dev, struct sk_buff *skb,
1810 void *accel_priv __attribute__((unused)),
1811 select_queue_fallback_t fallback __attribute__((unused)))
1817 qindex = skb_tx_hash(dev, skb);
1819 return (u16)(qindex % (lio->linfo.num_txpciq));
1822 /** Routine to push packets arriving on Octeon interface upto network layer.
1823 * @param oct_id - octeon device id.
1824 * @param skbuff - skbuff struct to be passed to network layer.
1825 * @param len - size of total data received.
1826 * @param rh - Control header associated with the packet
1827 * @param param - additional control data with the packet
1828 * @param arg - farg registered in droq_ops
1831 liquidio_push_packet(u32 octeon_id __attribute__((unused)),
1834 union octeon_rh *rh,
1838 struct napi_struct *napi = param;
1839 struct sk_buff *skb = (struct sk_buff *)skbuff;
1840 struct skb_shared_hwtstamps *shhwtstamps;
1843 struct net_device *netdev = (struct net_device *)arg;
1844 struct octeon_droq *droq = container_of(param, struct octeon_droq,
1847 int packet_was_received;
1848 struct lio *lio = GET_LIO(netdev);
1849 struct octeon_device *oct = lio->oct_dev;
1851 /* Do not proceed if the interface is not in RUNNING state. */
1852 if (!ifstate_check(lio, LIO_IFSTATE_RUNNING)) {
1853 recv_buffer_free(skb);
1854 droq->stats.rx_dropped++;
1860 skb_record_rx_queue(skb, droq->q_no);
1861 if (likely(len > MIN_SKB_SIZE)) {
1862 struct octeon_skb_page_info *pg_info;
1865 pg_info = ((struct octeon_skb_page_info *)(skb->cb));
1866 if (pg_info->page) {
1867 /* For Paged allocation use the frags */
1868 va = page_address(pg_info->page) +
1869 pg_info->page_offset;
1870 memcpy(skb->data, va, MIN_SKB_SIZE);
1871 skb_put(skb, MIN_SKB_SIZE);
1872 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
1874 pg_info->page_offset +
1880 struct octeon_skb_page_info *pg_info =
1881 ((struct octeon_skb_page_info *)(skb->cb));
1882 skb_copy_to_linear_data(skb, page_address(pg_info->page)
1883 + pg_info->page_offset, len);
1885 put_page(pg_info->page);
1888 if (((oct->chip_id == OCTEON_CN66XX) ||
1889 (oct->chip_id == OCTEON_CN68XX)) &&
1891 if (rh->r_dh.has_hwtstamp) {
1892 /* timestamp is included from the hardware at
1893 * the beginning of the packet.
1896 (lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED)) {
1897 /* Nanoseconds are in the first 64-bits
1900 memcpy(&ns, (skb->data), sizeof(ns));
1901 shhwtstamps = skb_hwtstamps(skb);
1902 shhwtstamps->hwtstamp =
1906 skb_pull(skb, sizeof(ns));
1910 skb->protocol = eth_type_trans(skb, skb->dev);
1911 if ((netdev->features & NETIF_F_RXCSUM) &&
1912 (((rh->r_dh.encap_on) &&
1913 (rh->r_dh.csum_verified & CNNIC_TUN_CSUM_VERIFIED)) ||
1914 (!(rh->r_dh.encap_on) &&
1915 (rh->r_dh.csum_verified & CNNIC_CSUM_VERIFIED))))
1916 /* checksum has already been verified */
1917 skb->ip_summed = CHECKSUM_UNNECESSARY;
1919 skb->ip_summed = CHECKSUM_NONE;
1921 /* Setting Encapsulation field on basis of status received
1924 if (rh->r_dh.encap_on) {
1925 skb->encapsulation = 1;
1926 skb->csum_level = 1;
1927 droq->stats.rx_vxlan++;
1930 /* inbound VLAN tag */
1931 if ((netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
1932 (rh->r_dh.vlan != 0)) {
1933 u16 vid = rh->r_dh.vlan;
1934 u16 priority = rh->r_dh.priority;
1936 vtag = priority << 13 | vid;
1937 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vtag);
1940 packet_was_received = napi_gro_receive(napi, skb) != GRO_DROP;
1942 if (packet_was_received) {
1943 droq->stats.rx_bytes_received += len;
1944 droq->stats.rx_pkts_received++;
1945 netdev->last_rx = jiffies;
1947 droq->stats.rx_dropped++;
1948 netif_info(lio, rx_err, lio->netdev,
1949 "droq:%d error rx_dropped:%llu\n",
1950 droq->q_no, droq->stats.rx_dropped);
1954 recv_buffer_free(skb);
1959 * \brief wrapper for calling napi_schedule
1960 * @param param parameters to pass to napi_schedule
1962 * Used when scheduling on different CPUs
1964 static void napi_schedule_wrapper(void *param)
1966 struct napi_struct *napi = param;
1968 napi_schedule(napi);
1972 * \brief callback when receive interrupt occurs and we are in NAPI mode
1973 * @param arg pointer to octeon output queue
1975 static void liquidio_napi_drv_callback(void *arg)
1977 struct octeon_droq *droq = arg;
1978 int this_cpu = smp_processor_id();
1980 if (droq->cpu_id == this_cpu) {
1981 napi_schedule(&droq->napi);
1983 struct call_single_data *csd = &droq->csd;
1985 csd->func = napi_schedule_wrapper;
1986 csd->info = &droq->napi;
1989 smp_call_function_single_async(droq->cpu_id, csd);
1994 * \brief Entry point for NAPI polling
1995 * @param napi NAPI structure
1996 * @param budget maximum number of items to process
1998 static int liquidio_napi_poll(struct napi_struct *napi, int budget)
2000 struct octeon_droq *droq;
2002 int tx_done = 0, iq_no;
2003 struct octeon_instr_queue *iq;
2004 struct octeon_device *oct;
2006 droq = container_of(napi, struct octeon_droq, napi);
2007 oct = droq->oct_dev;
2009 /* Handle Droq descriptors */
2010 work_done = octeon_process_droq_poll_cmd(oct, droq->q_no,
2011 POLL_EVENT_PROCESS_PKTS,
2014 /* Flush the instruction queue */
2015 iq = oct->instr_queue[iq_no];
2017 /* Process iq buffers with in the budget limits */
2018 tx_done = octeon_flush_iq(oct, iq, 1, budget);
2019 /* Update iq read-index rather than waiting for next interrupt.
2020 * Return back if tx_done is false.
2022 update_txq_status(oct, iq_no);
2023 /*tx_done = (iq->flush_index == iq->octeon_read_index);*/
2025 dev_err(&oct->pci_dev->dev, "%s: iq (%d) num invalid\n",
2029 if ((work_done < budget) && (tx_done)) {
2030 napi_complete(napi);
2031 octeon_process_droq_poll_cmd(droq->oct_dev, droq->q_no,
2032 POLL_EVENT_ENABLE_INTR, 0);
2036 return (!tx_done) ? (budget) : (work_done);
2040 * \brief Setup input and output queues
2041 * @param octeon_dev octeon device
2042 * @param ifidx Interface Index
2044 * Note: Queues are with respect to the octeon device. Thus
2045 * an input queue is for egress packets, and output queues
2046 * are for ingress packets.
2048 static inline int setup_io_queues(struct octeon_device *octeon_dev,
2051 struct octeon_droq_ops droq_ops;
2052 struct net_device *netdev;
2054 static int cpu_id_modulus;
2055 struct octeon_droq *droq;
2056 struct napi_struct *napi;
2057 int q, q_no, retval = 0;
2061 netdev = octeon_dev->props[ifidx].netdev;
2063 lio = GET_LIO(netdev);
2065 memset(&droq_ops, 0, sizeof(struct octeon_droq_ops));
2067 droq_ops.fptr = liquidio_push_packet;
2068 droq_ops.farg = (void *)netdev;
2070 droq_ops.poll_mode = 1;
2071 droq_ops.napi_fn = liquidio_napi_drv_callback;
2073 cpu_id_modulus = num_present_cpus();
2076 for (q = 0; q < lio->linfo.num_rxpciq; q++) {
2077 q_no = lio->linfo.rxpciq[q].s.q_no;
2078 dev_dbg(&octeon_dev->pci_dev->dev,
2079 "setup_io_queues index:%d linfo.rxpciq.s.q_no:%d\n",
2081 retval = octeon_setup_droq(octeon_dev, q_no,
2082 CFG_GET_NUM_RX_DESCS_NIC_IF
2083 (octeon_get_conf(octeon_dev),
2085 CFG_GET_NUM_RX_BUF_SIZE_NIC_IF
2086 (octeon_get_conf(octeon_dev),
2089 dev_err(&octeon_dev->pci_dev->dev,
2090 "%s : Runtime DROQ(RxQ) creation failed.\n",
2095 droq = octeon_dev->droq[q_no];
2097 dev_dbg(&octeon_dev->pci_dev->dev, "netif_napi_add netdev:%llx oct:%llx pf_num:%d\n",
2098 (u64)netdev, (u64)octeon_dev, octeon_dev->pf_num);
2099 netif_napi_add(netdev, napi, liquidio_napi_poll, 64);
2101 /* designate a CPU for this droq */
2102 droq->cpu_id = cpu_id;
2104 if (cpu_id >= cpu_id_modulus)
2107 octeon_register_droq_ops(octeon_dev, q_no, &droq_ops);
2111 for (q = 0; q < lio->linfo.num_txpciq; q++) {
2112 num_tx_descs = CFG_GET_NUM_TX_DESCS_NIC_IF(octeon_get_conf
2115 retval = octeon_setup_iq(octeon_dev, ifidx, q,
2116 lio->linfo.txpciq[q], num_tx_descs,
2117 netdev_get_tx_queue(netdev, q));
2119 dev_err(&octeon_dev->pci_dev->dev,
2120 " %s : Runtime IQ(TxQ) creation failed.\n",
2130 * \brief Poll routine for checking transmit queue status
2131 * @param work work_struct data structure
2133 static void octnet_poll_check_txq_status(struct work_struct *work)
2135 struct cavium_wk *wk = (struct cavium_wk *)work;
2136 struct lio *lio = (struct lio *)wk->ctxptr;
2138 if (!ifstate_check(lio, LIO_IFSTATE_RUNNING))
2141 check_txq_status(lio);
2142 queue_delayed_work(lio->txq_status_wq.wq,
2143 &lio->txq_status_wq.wk.work, msecs_to_jiffies(1));
2147 * \brief Sets up the txq poll check
2148 * @param netdev network device
2150 static inline void setup_tx_poll_fn(struct net_device *netdev)
2152 struct lio *lio = GET_LIO(netdev);
2153 struct octeon_device *oct = lio->oct_dev;
2155 lio->txq_status_wq.wq = alloc_workqueue("txq-status",
2157 if (!lio->txq_status_wq.wq) {
2158 dev_err(&oct->pci_dev->dev, "unable to create cavium txq status wq\n");
2161 INIT_DELAYED_WORK(&lio->txq_status_wq.wk.work,
2162 octnet_poll_check_txq_status);
2163 lio->txq_status_wq.wk.ctxptr = lio;
2164 queue_delayed_work(lio->txq_status_wq.wq,
2165 &lio->txq_status_wq.wk.work, msecs_to_jiffies(1));
2168 static inline void cleanup_tx_poll_fn(struct net_device *netdev)
2170 struct lio *lio = GET_LIO(netdev);
2172 cancel_delayed_work_sync(&lio->txq_status_wq.wk.work);
2173 destroy_workqueue(lio->txq_status_wq.wq);
2177 * \brief Net device open for LiquidIO
2178 * @param netdev network device
2180 static int liquidio_open(struct net_device *netdev)
2182 struct lio *lio = GET_LIO(netdev);
2183 struct octeon_device *oct = lio->oct_dev;
2184 struct napi_struct *napi, *n;
2186 if (oct->props[lio->ifidx].napi_enabled == 0) {
2187 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
2190 oct->props[lio->ifidx].napi_enabled = 1;
2193 oct_ptp_open(netdev);
2195 ifstate_set(lio, LIO_IFSTATE_RUNNING);
2197 setup_tx_poll_fn(netdev);
2201 netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
2203 /* tell Octeon to start forwarding packets to host */
2204 send_rx_ctrl_cmd(lio, 1);
2206 /* Ready for link status updates */
2209 dev_info(&oct->pci_dev->dev, "%s interface is opened\n",
2216 * \brief Net device stop for LiquidIO
2217 * @param netdev network device
2219 static int liquidio_stop(struct net_device *netdev)
2221 struct lio *lio = GET_LIO(netdev);
2222 struct octeon_device *oct = lio->oct_dev;
2224 ifstate_reset(lio, LIO_IFSTATE_RUNNING);
2226 netif_tx_disable(netdev);
2228 /* Inform that netif carrier is down */
2229 netif_carrier_off(netdev);
2231 lio->linfo.link.s.link_up = 0;
2232 lio->link_changes++;
2234 /* Pause for a moment and wait for Octeon to flush out (to the wire) any
2235 * egress packets that are in-flight.
2237 set_current_state(TASK_INTERRUPTIBLE);
2238 schedule_timeout(msecs_to_jiffies(100));
2240 /* Now it should be safe to tell Octeon that nic interface is down. */
2241 send_rx_ctrl_cmd(lio, 0);
2243 cleanup_tx_poll_fn(netdev);
2245 if (lio->ptp_clock) {
2246 ptp_clock_unregister(lio->ptp_clock);
2247 lio->ptp_clock = NULL;
2250 dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
2256 * \brief Converts a mask based on net device flags
2257 * @param netdev network device
2259 * This routine generates a octnet_ifflags mask from the net device flags
2260 * received from the OS.
2262 static inline enum octnet_ifflags get_new_flags(struct net_device *netdev)
2264 enum octnet_ifflags f = OCTNET_IFFLAG_UNICAST;
2266 if (netdev->flags & IFF_PROMISC)
2267 f |= OCTNET_IFFLAG_PROMISC;
2269 if (netdev->flags & IFF_ALLMULTI)
2270 f |= OCTNET_IFFLAG_ALLMULTI;
2272 if (netdev->flags & IFF_MULTICAST) {
2273 f |= OCTNET_IFFLAG_MULTICAST;
2275 /* Accept all multicast addresses if there are more than we
2278 if (netdev_mc_count(netdev) > MAX_OCTEON_MULTICAST_ADDR)
2279 f |= OCTNET_IFFLAG_ALLMULTI;
2282 if (netdev->flags & IFF_BROADCAST)
2283 f |= OCTNET_IFFLAG_BROADCAST;
2289 * \brief Net device set_multicast_list
2290 * @param netdev network device
2292 static void liquidio_set_mcast_list(struct net_device *netdev)
2294 struct lio *lio = GET_LIO(netdev);
2295 struct octeon_device *oct = lio->oct_dev;
2296 struct octnic_ctrl_pkt nctrl;
2297 struct netdev_hw_addr *ha;
2300 int mc_count = min(netdev_mc_count(netdev), MAX_OCTEON_MULTICAST_ADDR);
2302 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
2304 /* Create a ctrl pkt command to be sent to core app. */
2306 nctrl.ncmd.s.cmd = OCTNET_CMD_SET_MULTI_LIST;
2307 nctrl.ncmd.s.param1 = get_new_flags(netdev);
2308 nctrl.ncmd.s.param2 = mc_count;
2309 nctrl.ncmd.s.more = mc_count;
2310 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
2311 nctrl.netpndev = (u64)netdev;
2312 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
2314 /* copy all the addresses into the udd */
2316 netdev_for_each_mc_addr(ha, netdev) {
2318 memcpy(((u8 *)mc) + 2, ha->addr, ETH_ALEN);
2319 /* no need to swap bytes */
2321 if (++mc > &nctrl.udd[mc_count])
2325 /* Apparently, any activity in this call from the kernel has to
2326 * be atomic. So we won't wait for response.
2328 nctrl.wait_time = 0;
2330 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
2332 dev_err(&oct->pci_dev->dev, "DEVFLAGS change failed in core (ret: 0x%x)\n",
2338 * \brief Net device set_mac_address
2339 * @param netdev network device
2341 static int liquidio_set_mac(struct net_device *netdev, void *p)
2344 struct lio *lio = GET_LIO(netdev);
2345 struct octeon_device *oct = lio->oct_dev;
2346 struct sockaddr *addr = (struct sockaddr *)p;
2347 struct octnic_ctrl_pkt nctrl;
2349 if (!is_valid_ether_addr(addr->sa_data))
2350 return -EADDRNOTAVAIL;
2352 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
2355 nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MACADDR;
2356 nctrl.ncmd.s.param1 = 0;
2357 nctrl.ncmd.s.more = 1;
2358 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
2359 nctrl.netpndev = (u64)netdev;
2360 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
2361 nctrl.wait_time = 100;
2364 /* The MAC Address is presented in network byte order. */
2365 memcpy((u8 *)&nctrl.udd[0] + 2, addr->sa_data, ETH_ALEN);
2367 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
2369 dev_err(&oct->pci_dev->dev, "MAC Address change failed\n");
2372 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2373 memcpy(((u8 *)&lio->linfo.hw_addr) + 2, addr->sa_data, ETH_ALEN);
2379 * \brief Net device get_stats
2380 * @param netdev network device
2382 static struct net_device_stats *liquidio_get_stats(struct net_device *netdev)
2384 struct lio *lio = GET_LIO(netdev);
2385 struct net_device_stats *stats = &netdev->stats;
2386 struct octeon_device *oct;
2387 u64 pkts = 0, drop = 0, bytes = 0;
2388 struct oct_droq_stats *oq_stats;
2389 struct oct_iq_stats *iq_stats;
2390 int i, iq_no, oq_no;
2394 for (i = 0; i < lio->linfo.num_txpciq; i++) {
2395 iq_no = lio->linfo.txpciq[i].s.q_no;
2396 iq_stats = &oct->instr_queue[iq_no]->stats;
2397 pkts += iq_stats->tx_done;
2398 drop += iq_stats->tx_dropped;
2399 bytes += iq_stats->tx_tot_bytes;
2402 stats->tx_packets = pkts;
2403 stats->tx_bytes = bytes;
2404 stats->tx_dropped = drop;
2410 for (i = 0; i < lio->linfo.num_rxpciq; i++) {
2411 oq_no = lio->linfo.rxpciq[i].s.q_no;
2412 oq_stats = &oct->droq[oq_no]->stats;
2413 pkts += oq_stats->rx_pkts_received;
2414 drop += (oq_stats->rx_dropped +
2415 oq_stats->dropped_nodispatch +
2416 oq_stats->dropped_toomany +
2417 oq_stats->dropped_nomem);
2418 bytes += oq_stats->rx_bytes_received;
2421 stats->rx_bytes = bytes;
2422 stats->rx_packets = pkts;
2423 stats->rx_dropped = drop;
2429 * \brief Net device change_mtu
2430 * @param netdev network device
2432 static int liquidio_change_mtu(struct net_device *netdev, int new_mtu)
2434 struct lio *lio = GET_LIO(netdev);
2435 struct octeon_device *oct = lio->oct_dev;
2436 struct octnic_ctrl_pkt nctrl;
2439 /* Limit the MTU to make sure the ethernet packets are between 68 bytes
2442 if ((new_mtu < LIO_MIN_MTU_SIZE) ||
2443 (new_mtu > LIO_MAX_MTU_SIZE)) {
2444 dev_err(&oct->pci_dev->dev, "Invalid MTU: %d\n", new_mtu);
2445 dev_err(&oct->pci_dev->dev, "Valid range %d and %d\n",
2446 LIO_MIN_MTU_SIZE, LIO_MAX_MTU_SIZE);
2450 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
2453 nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MTU;
2454 nctrl.ncmd.s.param1 = new_mtu;
2455 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
2456 nctrl.wait_time = 100;
2457 nctrl.netpndev = (u64)netdev;
2458 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
2460 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
2462 dev_err(&oct->pci_dev->dev, "Failed to set MTU\n");
2472 * \brief Handler for SIOCSHWTSTAMP ioctl
2473 * @param netdev network device
2474 * @param ifr interface request
2475 * @param cmd command
2477 static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
2479 struct hwtstamp_config conf;
2480 struct lio *lio = GET_LIO(netdev);
2482 if (copy_from_user(&conf, ifr->ifr_data, sizeof(conf)))
2488 switch (conf.tx_type) {
2489 case HWTSTAMP_TX_ON:
2490 case HWTSTAMP_TX_OFF:
2496 switch (conf.rx_filter) {
2497 case HWTSTAMP_FILTER_NONE:
2499 case HWTSTAMP_FILTER_ALL:
2500 case HWTSTAMP_FILTER_SOME:
2501 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
2502 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
2503 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
2504 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
2505 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
2506 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
2507 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
2508 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
2509 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
2510 case HWTSTAMP_FILTER_PTP_V2_EVENT:
2511 case HWTSTAMP_FILTER_PTP_V2_SYNC:
2512 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
2513 conf.rx_filter = HWTSTAMP_FILTER_ALL;
2519 if (conf.rx_filter == HWTSTAMP_FILTER_ALL)
2520 ifstate_set(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
2523 ifstate_reset(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
2525 return copy_to_user(ifr->ifr_data, &conf, sizeof(conf)) ? -EFAULT : 0;
2529 * \brief ioctl handler
2530 * @param netdev network device
2531 * @param ifr interface request
2532 * @param cmd command
2534 static int liquidio_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2538 return hwtstamp_ioctl(netdev, ifr);
2545 * \brief handle a Tx timestamp response
2546 * @param status response status
2547 * @param buf pointer to skb
2549 static void handle_timestamp(struct octeon_device *oct,
2553 struct octnet_buf_free_info *finfo;
2554 struct octeon_soft_command *sc;
2555 struct oct_timestamp_resp *resp;
2557 struct sk_buff *skb = (struct sk_buff *)buf;
2559 finfo = (struct octnet_buf_free_info *)skb->cb;
2563 resp = (struct oct_timestamp_resp *)sc->virtrptr;
2565 if (status != OCTEON_REQUEST_DONE) {
2566 dev_err(&oct->pci_dev->dev, "Tx timestamp instruction failed. Status: %llx\n",
2567 CVM_CAST64(status));
2568 resp->timestamp = 0;
2571 octeon_swap_8B_data(&resp->timestamp, 1);
2573 if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS) != 0)) {
2574 struct skb_shared_hwtstamps ts;
2575 u64 ns = resp->timestamp;
2577 netif_info(lio, tx_done, lio->netdev,
2578 "Got resulting SKBTX_HW_TSTAMP skb=%p ns=%016llu\n",
2579 skb, (unsigned long long)ns);
2580 ts.hwtstamp = ns_to_ktime(ns + lio->ptp_adjust);
2581 skb_tstamp_tx(skb, &ts);
2584 octeon_free_soft_command(oct, sc);
2585 tx_buffer_free(skb);
2588 /* \brief Send a data packet that will be timestamped
2589 * @param oct octeon device
2590 * @param ndata pointer to network data
2591 * @param finfo pointer to private network data
2593 static inline int send_nic_timestamp_pkt(struct octeon_device *oct,
2594 struct octnic_data_pkt *ndata,
2595 struct octnet_buf_free_info *finfo)
2598 struct octeon_soft_command *sc;
2605 sc = octeon_alloc_soft_command_resp(oct, &ndata->cmd,
2606 sizeof(struct oct_timestamp_resp));
2610 dev_err(&oct->pci_dev->dev, "No memory for timestamped data packet\n");
2611 return IQ_SEND_FAILED;
2614 if (ndata->reqtype == REQTYPE_NORESP_NET)
2615 ndata->reqtype = REQTYPE_RESP_NET;
2616 else if (ndata->reqtype == REQTYPE_NORESP_NET_SG)
2617 ndata->reqtype = REQTYPE_RESP_NET_SG;
2619 sc->callback = handle_timestamp;
2620 sc->callback_arg = finfo->skb;
2621 sc->iq_no = ndata->q_no;
2623 len = (u32)((struct octeon_instr_ih2 *)(&sc->cmd.cmd2.ih2))->dlengsz;
2626 retval = octeon_send_command(oct, sc->iq_no, ring_doorbell, &sc->cmd,
2627 sc, len, ndata->reqtype);
2629 if (retval == IQ_SEND_FAILED) {
2630 dev_err(&oct->pci_dev->dev, "timestamp data packet failed status: %x\n",
2632 octeon_free_soft_command(oct, sc);
2634 netif_info(lio, tx_queued, lio->netdev, "Queued timestamp packet\n");
2640 /** \brief Transmit networks packets to the Octeon interface
2641 * @param skbuff skbuff struct to be passed to network layer.
2642 * @param netdev pointer to network device
2643 * @returns whether the packet was transmitted to the device okay or not
2644 * (NETDEV_TX_OK or NETDEV_TX_BUSY)
2646 static int liquidio_xmit(struct sk_buff *skb, struct net_device *netdev)
2649 struct octnet_buf_free_info *finfo;
2650 union octnic_cmd_setup cmdsetup;
2651 struct octnic_data_pkt ndata;
2652 struct octeon_device *oct;
2653 struct oct_iq_stats *stats;
2654 struct octeon_instr_irh *irh;
2655 union tx_info *tx_info;
2657 int q_idx = 0, iq_no = 0;
2662 lio = GET_LIO(netdev);
2665 if (netif_is_multiqueue(netdev)) {
2666 q_idx = skb->queue_mapping;
2667 q_idx = (q_idx % (lio->linfo.num_txpciq));
2669 iq_no = lio->linfo.txpciq[q_idx].s.q_no;
2674 stats = &oct->instr_queue[iq_no]->stats;
2676 /* Check for all conditions in which the current packet cannot be
2679 if (!(atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING) ||
2680 (!lio->linfo.link.s.link_up) ||
2682 netif_info(lio, tx_err, lio->netdev,
2683 "Transmit failed link_status : %d\n",
2684 lio->linfo.link.s.link_up);
2685 goto lio_xmit_failed;
2688 /* Use space in skb->cb to store info used to unmap and
2691 finfo = (struct octnet_buf_free_info *)skb->cb;
2696 /* Prepare the attributes for the data to be passed to OSI. */
2697 memset(&ndata, 0, sizeof(struct octnic_data_pkt));
2699 ndata.buf = (void *)finfo;
2703 if (netif_is_multiqueue(netdev)) {
2704 if (octnet_iq_is_full(oct, ndata.q_no)) {
2705 /* defer sending if queue is full */
2706 netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
2708 stats->tx_iq_busy++;
2709 return NETDEV_TX_BUSY;
2712 if (octnet_iq_is_full(oct, lio->txq)) {
2713 /* defer sending if queue is full */
2714 stats->tx_iq_busy++;
2715 netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
2717 return NETDEV_TX_BUSY;
2720 /* pr_info(" XMIT - valid Qs: %d, 1st Q no: %d, cpu: %d, q_no:%d\n",
2721 * lio->linfo.num_txpciq, lio->txq, cpu, ndata.q_no);
2724 ndata.datasize = skb->len;
2727 cmdsetup.s.iq_no = iq_no;
2729 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2730 if (skb->encapsulation) {
2731 cmdsetup.s.tnl_csum = 1;
2734 cmdsetup.s.transport_csum = 1;
2737 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
2738 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
2739 cmdsetup.s.timestamp = 1;
2742 if (skb_shinfo(skb)->nr_frags == 0) {
2743 cmdsetup.s.u.datasize = skb->len;
2744 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
2746 /* Offload checksum calculation for TCP/UDP packets */
2747 dptr = dma_map_single(&oct->pci_dev->dev,
2751 if (dma_mapping_error(&oct->pci_dev->dev, dptr)) {
2752 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 1\n",
2754 return NETDEV_TX_BUSY;
2757 ndata.cmd.cmd2.dptr = dptr;
2759 ndata.reqtype = REQTYPE_NORESP_NET;
2763 struct skb_frag_struct *frag;
2764 struct octnic_gather *g;
2766 spin_lock(&lio->glist_lock[q_idx]);
2767 g = (struct octnic_gather *)
2768 list_delete_head(&lio->glist[q_idx]);
2769 spin_unlock(&lio->glist_lock[q_idx]);
2772 netif_info(lio, tx_err, lio->netdev,
2773 "Transmit scatter gather: glist null!\n");
2774 goto lio_xmit_failed;
2777 cmdsetup.s.gather = 1;
2778 cmdsetup.s.u.gatherptrs = (skb_shinfo(skb)->nr_frags + 1);
2779 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
2781 memset(g->sg, 0, g->sg_size);
2783 g->sg[0].ptr[0] = dma_map_single(&oct->pci_dev->dev,
2785 (skb->len - skb->data_len),
2787 if (dma_mapping_error(&oct->pci_dev->dev, g->sg[0].ptr[0])) {
2788 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 2\n",
2790 return NETDEV_TX_BUSY;
2792 add_sg_size(&g->sg[0], (skb->len - skb->data_len), 0);
2794 frags = skb_shinfo(skb)->nr_frags;
2797 frag = &skb_shinfo(skb)->frags[i - 1];
2799 g->sg[(i >> 2)].ptr[(i & 3)] =
2800 dma_map_page(&oct->pci_dev->dev,
2806 if (dma_mapping_error(&oct->pci_dev->dev,
2807 g->sg[i >> 2].ptr[i & 3])) {
2808 dma_unmap_single(&oct->pci_dev->dev,
2810 skb->len - skb->data_len,
2812 for (j = 1; j < i; j++) {
2813 frag = &skb_shinfo(skb)->frags[j - 1];
2814 dma_unmap_page(&oct->pci_dev->dev,
2815 g->sg[j >> 2].ptr[j & 3],
2819 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 3\n",
2821 return NETDEV_TX_BUSY;
2824 add_sg_size(&g->sg[(i >> 2)], frag->size, (i & 3));
2828 dma_sync_single_for_device(&oct->pci_dev->dev, g->sg_dma_ptr,
2829 g->sg_size, DMA_TO_DEVICE);
2830 dptr = g->sg_dma_ptr;
2832 ndata.cmd.cmd2.dptr = dptr;
2836 ndata.reqtype = REQTYPE_NORESP_NET_SG;
2839 irh = (struct octeon_instr_irh *)&ndata.cmd.cmd2.irh;
2840 tx_info = (union tx_info *)&ndata.cmd.cmd2.ossp[0];
2842 if (skb_shinfo(skb)->gso_size) {
2843 tx_info->s.gso_size = skb_shinfo(skb)->gso_size;
2844 tx_info->s.gso_segs = skb_shinfo(skb)->gso_segs;
2848 /* HW insert VLAN tag */
2849 if (skb_vlan_tag_present(skb)) {
2850 irh->priority = skb_vlan_tag_get(skb) >> 13;
2851 irh->vlan = skb_vlan_tag_get(skb) & 0xfff;
2854 if (unlikely(cmdsetup.s.timestamp))
2855 status = send_nic_timestamp_pkt(oct, &ndata, finfo);
2857 status = octnet_send_nic_data_pkt(oct, &ndata);
2858 if (status == IQ_SEND_FAILED)
2859 goto lio_xmit_failed;
2861 netif_info(lio, tx_queued, lio->netdev, "Transmit queued successfully\n");
2863 if (status == IQ_SEND_STOP)
2864 stop_q(lio->netdev, q_idx);
2866 netif_trans_update(netdev);
2868 if (skb_shinfo(skb)->gso_size)
2869 stats->tx_done += skb_shinfo(skb)->gso_segs;
2872 stats->tx_tot_bytes += skb->len;
2874 return NETDEV_TX_OK;
2877 stats->tx_dropped++;
2878 netif_info(lio, tx_err, lio->netdev, "IQ%d Transmit dropped:%llu\n",
2879 iq_no, stats->tx_dropped);
2881 dma_unmap_single(&oct->pci_dev->dev, dptr,
2882 ndata.datasize, DMA_TO_DEVICE);
2883 tx_buffer_free(skb);
2884 return NETDEV_TX_OK;
2887 /** \brief Network device Tx timeout
2888 * @param netdev pointer to network device
2890 static void liquidio_tx_timeout(struct net_device *netdev)
2894 lio = GET_LIO(netdev);
2896 netif_info(lio, tx_err, lio->netdev,
2897 "Transmit timeout tx_dropped:%ld, waking up queues now!!\n",
2898 netdev->stats.tx_dropped);
2899 netif_trans_update(netdev);
2903 static int liquidio_vlan_rx_add_vid(struct net_device *netdev,
2904 __be16 proto __attribute__((unused)),
2907 struct lio *lio = GET_LIO(netdev);
2908 struct octeon_device *oct = lio->oct_dev;
2909 struct octnic_ctrl_pkt nctrl;
2912 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
2915 nctrl.ncmd.s.cmd = OCTNET_CMD_ADD_VLAN_FILTER;
2916 nctrl.ncmd.s.param1 = vid;
2917 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
2918 nctrl.wait_time = 100;
2919 nctrl.netpndev = (u64)netdev;
2920 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
2922 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
2924 dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
2931 static int liquidio_vlan_rx_kill_vid(struct net_device *netdev,
2932 __be16 proto __attribute__((unused)),
2935 struct lio *lio = GET_LIO(netdev);
2936 struct octeon_device *oct = lio->oct_dev;
2937 struct octnic_ctrl_pkt nctrl;
2940 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
2943 nctrl.ncmd.s.cmd = OCTNET_CMD_DEL_VLAN_FILTER;
2944 nctrl.ncmd.s.param1 = vid;
2945 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
2946 nctrl.wait_time = 100;
2947 nctrl.netpndev = (u64)netdev;
2948 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
2950 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
2952 dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
2958 /** Sending command to enable/disable RX checksum offload
2959 * @param netdev pointer to network device
2960 * @param command OCTNET_CMD_TNL_RX_CSUM_CTL
2961 * @param rx_cmd_bit OCTNET_CMD_RXCSUM_ENABLE/
2962 * OCTNET_CMD_RXCSUM_DISABLE
2963 * @returns SUCCESS or FAILURE
2965 static int liquidio_set_rxcsum_command(struct net_device *netdev, int command,
2968 struct lio *lio = GET_LIO(netdev);
2969 struct octeon_device *oct = lio->oct_dev;
2970 struct octnic_ctrl_pkt nctrl;
2974 nctrl.ncmd.s.cmd = command;
2975 nctrl.ncmd.s.param1 = rx_cmd;
2976 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
2977 nctrl.wait_time = 100;
2978 nctrl.netpndev = (u64)netdev;
2979 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
2981 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
2983 dev_err(&oct->pci_dev->dev,
2984 "DEVFLAGS RXCSUM change failed in core(ret:0x%x)\n",
2990 /** Sending command to add/delete VxLAN UDP port to firmware
2991 * @param netdev pointer to network device
2992 * @param command OCTNET_CMD_VXLAN_PORT_CONFIG
2993 * @param vxlan_port VxLAN port to be added or deleted
2994 * @param vxlan_cmd_bit OCTNET_CMD_VXLAN_PORT_ADD,
2995 * OCTNET_CMD_VXLAN_PORT_DEL
2996 * @returns SUCCESS or FAILURE
2998 static int liquidio_vxlan_port_command(struct net_device *netdev, int command,
2999 u16 vxlan_port, u8 vxlan_cmd_bit)
3001 struct lio *lio = GET_LIO(netdev);
3002 struct octeon_device *oct = lio->oct_dev;
3003 struct octnic_ctrl_pkt nctrl;
3007 nctrl.ncmd.s.cmd = command;
3008 nctrl.ncmd.s.more = vxlan_cmd_bit;
3009 nctrl.ncmd.s.param1 = vxlan_port;
3010 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
3011 nctrl.wait_time = 100;
3012 nctrl.netpndev = (u64)netdev;
3013 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
3015 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
3017 dev_err(&oct->pci_dev->dev,
3018 "VxLAN port add/delete failed in core (ret:0x%x)\n",
3024 /** \brief Net device fix features
3025 * @param netdev pointer to network device
3026 * @param request features requested
3027 * @returns updated features list
3029 static netdev_features_t liquidio_fix_features(struct net_device *netdev,
3030 netdev_features_t request)
3032 struct lio *lio = netdev_priv(netdev);
3034 if ((request & NETIF_F_RXCSUM) &&
3035 !(lio->dev_capability & NETIF_F_RXCSUM))
3036 request &= ~NETIF_F_RXCSUM;
3038 if ((request & NETIF_F_HW_CSUM) &&
3039 !(lio->dev_capability & NETIF_F_HW_CSUM))
3040 request &= ~NETIF_F_HW_CSUM;
3042 if ((request & NETIF_F_TSO) && !(lio->dev_capability & NETIF_F_TSO))
3043 request &= ~NETIF_F_TSO;
3045 if ((request & NETIF_F_TSO6) && !(lio->dev_capability & NETIF_F_TSO6))
3046 request &= ~NETIF_F_TSO6;
3048 if ((request & NETIF_F_LRO) && !(lio->dev_capability & NETIF_F_LRO))
3049 request &= ~NETIF_F_LRO;
3051 /*Disable LRO if RXCSUM is off */
3052 if (!(request & NETIF_F_RXCSUM) && (netdev->features & NETIF_F_LRO) &&
3053 (lio->dev_capability & NETIF_F_LRO))
3054 request &= ~NETIF_F_LRO;
3059 /** \brief Net device set features
3060 * @param netdev pointer to network device
3061 * @param features features to enable/disable
3063 static int liquidio_set_features(struct net_device *netdev,
3064 netdev_features_t features)
3066 struct lio *lio = netdev_priv(netdev);
3068 if (!((netdev->features ^ features) & NETIF_F_LRO))
3071 if ((features & NETIF_F_LRO) && (lio->dev_capability & NETIF_F_LRO))
3072 liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
3073 OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
3074 else if (!(features & NETIF_F_LRO) &&
3075 (lio->dev_capability & NETIF_F_LRO))
3076 liquidio_set_feature(netdev, OCTNET_CMD_LRO_DISABLE,
3077 OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
3079 /* Sending command to firmware to enable/disable RX checksum
3080 * offload settings using ethtool
3082 if (!(netdev->features & NETIF_F_RXCSUM) &&
3083 (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
3084 (features & NETIF_F_RXCSUM))
3085 liquidio_set_rxcsum_command(netdev,
3086 OCTNET_CMD_TNL_RX_CSUM_CTL,
3087 OCTNET_CMD_RXCSUM_ENABLE);
3088 else if ((netdev->features & NETIF_F_RXCSUM) &&
3089 (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
3090 !(features & NETIF_F_RXCSUM))
3091 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
3092 OCTNET_CMD_RXCSUM_DISABLE);
3097 static void liquidio_add_vxlan_port(struct net_device *netdev,
3098 struct udp_tunnel_info *ti)
3100 if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
3103 liquidio_vxlan_port_command(netdev,
3104 OCTNET_CMD_VXLAN_PORT_CONFIG,
3106 OCTNET_CMD_VXLAN_PORT_ADD);
3109 static void liquidio_del_vxlan_port(struct net_device *netdev,
3110 struct udp_tunnel_info *ti)
3112 if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
3115 liquidio_vxlan_port_command(netdev,
3116 OCTNET_CMD_VXLAN_PORT_CONFIG,
3118 OCTNET_CMD_VXLAN_PORT_DEL);
3121 static struct net_device_ops lionetdevops = {
3122 .ndo_open = liquidio_open,
3123 .ndo_stop = liquidio_stop,
3124 .ndo_start_xmit = liquidio_xmit,
3125 .ndo_get_stats = liquidio_get_stats,
3126 .ndo_set_mac_address = liquidio_set_mac,
3127 .ndo_set_rx_mode = liquidio_set_mcast_list,
3128 .ndo_tx_timeout = liquidio_tx_timeout,
3130 .ndo_vlan_rx_add_vid = liquidio_vlan_rx_add_vid,
3131 .ndo_vlan_rx_kill_vid = liquidio_vlan_rx_kill_vid,
3132 .ndo_change_mtu = liquidio_change_mtu,
3133 .ndo_do_ioctl = liquidio_ioctl,
3134 .ndo_fix_features = liquidio_fix_features,
3135 .ndo_set_features = liquidio_set_features,
3136 .ndo_udp_tunnel_add = liquidio_add_vxlan_port,
3137 .ndo_udp_tunnel_del = liquidio_del_vxlan_port,
3140 /** \brief Entry point for the liquidio module
3142 static int __init liquidio_init(void)
3145 struct handshake *hs;
3147 init_completion(&first_stage);
3149 octeon_init_device_list(conf_type);
3151 if (liquidio_init_pci())
3154 wait_for_completion_timeout(&first_stage, msecs_to_jiffies(1000));
3156 for (i = 0; i < MAX_OCTEON_DEVICES; i++) {
3159 wait_for_completion(&hs->init);
3161 /* init handshake failed */
3162 dev_err(&hs->pci_dev->dev,
3163 "Failed to init device\n");
3164 liquidio_deinit_pci();
3170 for (i = 0; i < MAX_OCTEON_DEVICES; i++) {
3173 wait_for_completion_timeout(&hs->started,
3174 msecs_to_jiffies(30000));
3175 if (!hs->started_ok) {
3176 /* starter handshake failed */
3177 dev_err(&hs->pci_dev->dev,
3178 "Firmware failed to start\n");
3179 liquidio_deinit_pci();
3188 static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
3190 struct octeon_device *oct = (struct octeon_device *)buf;
3191 struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
3193 union oct_link_status *ls;
3196 if (recv_pkt->buffer_size[0] != sizeof(*ls)) {
3197 dev_err(&oct->pci_dev->dev, "Malformed NIC_INFO, len=%d, ifidx=%d\n",
3198 recv_pkt->buffer_size[0],
3199 recv_pkt->rh.r_nic_info.gmxport);
3203 gmxport = recv_pkt->rh.r_nic_info.gmxport;
3204 ls = (union oct_link_status *)get_rbd(recv_pkt->buffer_ptr[0]);
3206 octeon_swap_8B_data((u64 *)ls, (sizeof(union oct_link_status)) >> 3);
3207 for (i = 0; i < oct->ifcount; i++) {
3208 if (oct->props[i].gmxport == gmxport) {
3209 update_link_status(oct->props[i].netdev, ls);
3215 for (i = 0; i < recv_pkt->buffer_count; i++)
3216 recv_buffer_free(recv_pkt->buffer_ptr[i]);
3217 octeon_free_recv_info(recv_info);
3222 * \brief Setup network interfaces
3223 * @param octeon_dev octeon device
3225 * Called during init time for each device. It assumes the NIC
3226 * is already up and running. The link information for each
3227 * interface is passed in link_info.
3229 static int setup_nic_devices(struct octeon_device *octeon_dev)
3231 struct lio *lio = NULL;
3232 struct net_device *netdev;
3234 struct octeon_soft_command *sc;
3235 struct liquidio_if_cfg_context *ctx;
3236 struct liquidio_if_cfg_resp *resp;
3237 struct octdev_props *props;
3238 int retval, num_iqueues, num_oqueues;
3239 union oct_nic_if_cfg if_cfg;
3240 unsigned int base_queue;
3241 unsigned int gmx_port_id;
3242 u32 resp_size, ctx_size, data_size;
3244 struct lio_version *vdata;
3246 /* This is to handle link status changes */
3247 octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC,
3249 lio_nic_info, octeon_dev);
3251 /* REQTYPE_RESP_NET and REQTYPE_SOFT_COMMAND do not have free functions.
3252 * They are handled directly.
3254 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET,
3257 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET_SG,
3260 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_RESP_NET_SG,
3261 free_netsgbuf_with_resp);
3263 for (i = 0; i < octeon_dev->ifcount; i++) {
3264 resp_size = sizeof(struct liquidio_if_cfg_resp);
3265 ctx_size = sizeof(struct liquidio_if_cfg_context);
3266 data_size = sizeof(struct lio_version);
3267 sc = (struct octeon_soft_command *)
3268 octeon_alloc_soft_command(octeon_dev, data_size,
3269 resp_size, ctx_size);
3270 resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
3271 ctx = (struct liquidio_if_cfg_context *)sc->ctxptr;
3272 vdata = (struct lio_version *)sc->virtdptr;
3274 *((u64 *)vdata) = 0;
3275 vdata->major = cpu_to_be16(LIQUIDIO_BASE_MAJOR_VERSION);
3276 vdata->minor = cpu_to_be16(LIQUIDIO_BASE_MINOR_VERSION);
3277 vdata->micro = cpu_to_be16(LIQUIDIO_BASE_MICRO_VERSION);
3279 if (OCTEON_CN23XX_PF(octeon_dev)) {
3280 num_iqueues = octeon_dev->sriov_info.num_pf_rings;
3281 num_oqueues = octeon_dev->sriov_info.num_pf_rings;
3282 base_queue = octeon_dev->sriov_info.pf_srn;
3284 gmx_port_id = octeon_dev->pf_num;
3285 ifidx_or_pfnum = octeon_dev->pf_num;
3287 num_iqueues = CFG_GET_NUM_TXQS_NIC_IF(
3288 octeon_get_conf(octeon_dev), i);
3289 num_oqueues = CFG_GET_NUM_RXQS_NIC_IF(
3290 octeon_get_conf(octeon_dev), i);
3291 base_queue = CFG_GET_BASE_QUE_NIC_IF(
3292 octeon_get_conf(octeon_dev), i);
3293 gmx_port_id = CFG_GET_GMXID_NIC_IF(
3294 octeon_get_conf(octeon_dev), i);
3298 dev_dbg(&octeon_dev->pci_dev->dev,
3299 "requesting config for interface %d, iqs %d, oqs %d\n",
3300 ifidx_or_pfnum, num_iqueues, num_oqueues);
3301 WRITE_ONCE(ctx->cond, 0);
3302 ctx->octeon_id = lio_get_device_id(octeon_dev);
3303 init_waitqueue_head(&ctx->wc);
3306 if_cfg.s.num_iqueues = num_iqueues;
3307 if_cfg.s.num_oqueues = num_oqueues;
3308 if_cfg.s.base_queue = base_queue;
3309 if_cfg.s.gmx_port_id = gmx_port_id;
3313 octeon_prepare_soft_command(octeon_dev, sc, OPCODE_NIC,
3314 OPCODE_NIC_IF_CFG, 0,
3317 sc->callback = if_cfg_callback;
3318 sc->callback_arg = sc;
3319 sc->wait_time = 3000;
3321 retval = octeon_send_soft_command(octeon_dev, sc);
3322 if (retval == IQ_SEND_FAILED) {
3323 dev_err(&octeon_dev->pci_dev->dev,
3324 "iq/oq config failed status: %x\n",
3326 /* Soft instr is freed by driver in case of failure. */
3327 goto setup_nic_dev_fail;
3330 /* Sleep on a wait queue till the cond flag indicates that the
3331 * response arrived or timed-out.
3333 sleep_cond(&ctx->wc, &ctx->cond);
3334 retval = resp->status;
3336 dev_err(&octeon_dev->pci_dev->dev, "iq/oq config failed\n");
3337 goto setup_nic_dev_fail;
3340 octeon_swap_8B_data((u64 *)(&resp->cfg_info),
3341 (sizeof(struct liquidio_if_cfg_info)) >> 3);
3343 num_iqueues = hweight64(resp->cfg_info.iqmask);
3344 num_oqueues = hweight64(resp->cfg_info.oqmask);
3346 if (!(num_iqueues) || !(num_oqueues)) {
3347 dev_err(&octeon_dev->pci_dev->dev,
3348 "Got bad iqueues (%016llx) or oqueues (%016llx) from firmware.\n",
3349 resp->cfg_info.iqmask,
3350 resp->cfg_info.oqmask);
3351 goto setup_nic_dev_fail;
3353 dev_dbg(&octeon_dev->pci_dev->dev,
3354 "interface %d, iqmask %016llx, oqmask %016llx, numiqueues %d, numoqueues %d\n",
3355 i, resp->cfg_info.iqmask, resp->cfg_info.oqmask,
3356 num_iqueues, num_oqueues);
3357 netdev = alloc_etherdev_mq(LIO_SIZE, num_iqueues);
3360 dev_err(&octeon_dev->pci_dev->dev, "Device allocation failed\n");
3361 goto setup_nic_dev_fail;
3364 SET_NETDEV_DEV(netdev, &octeon_dev->pci_dev->dev);
3366 if (num_iqueues > 1)
3367 lionetdevops.ndo_select_queue = select_q;
3369 /* Associate the routines that will handle different
3372 netdev->netdev_ops = &lionetdevops;
3374 lio = GET_LIO(netdev);
3376 memset(lio, 0, sizeof(struct lio));
3378 lio->ifidx = ifidx_or_pfnum;
3380 props = &octeon_dev->props[i];
3381 props->gmxport = resp->cfg_info.linfo.gmxport;
3382 props->netdev = netdev;
3384 lio->linfo.num_rxpciq = num_oqueues;
3385 lio->linfo.num_txpciq = num_iqueues;
3386 for (j = 0; j < num_oqueues; j++) {
3387 lio->linfo.rxpciq[j].u64 =
3388 resp->cfg_info.linfo.rxpciq[j].u64;
3390 for (j = 0; j < num_iqueues; j++) {
3391 lio->linfo.txpciq[j].u64 =
3392 resp->cfg_info.linfo.txpciq[j].u64;
3394 lio->linfo.hw_addr = resp->cfg_info.linfo.hw_addr;
3395 lio->linfo.gmxport = resp->cfg_info.linfo.gmxport;
3396 lio->linfo.link.u64 = resp->cfg_info.linfo.link.u64;
3398 lio->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
3400 if (OCTEON_CN23XX_PF(octeon_dev) ||
3401 OCTEON_CN6XXX(octeon_dev)) {
3402 lio->dev_capability = NETIF_F_HIGHDMA
3405 | NETIF_F_SG | NETIF_F_RXCSUM
3407 | NETIF_F_TSO | NETIF_F_TSO6
3410 netif_set_gso_max_size(netdev, OCTNIC_GSO_MAX_SIZE);
3412 /* Copy of transmit encapsulation capabilities:
3413 * TSO, TSO6, Checksums for this device
3415 lio->enc_dev_capability = NETIF_F_IP_CSUM
3417 | NETIF_F_GSO_UDP_TUNNEL
3418 | NETIF_F_HW_CSUM | NETIF_F_SG
3420 | NETIF_F_TSO | NETIF_F_TSO6
3423 netdev->hw_enc_features = (lio->enc_dev_capability &
3426 lio->dev_capability |= NETIF_F_GSO_UDP_TUNNEL;
3428 netdev->vlan_features = lio->dev_capability;
3429 /* Add any unchangeable hw features */
3430 lio->dev_capability |= NETIF_F_HW_VLAN_CTAG_FILTER |
3431 NETIF_F_HW_VLAN_CTAG_RX |
3432 NETIF_F_HW_VLAN_CTAG_TX;
3434 netdev->features = (lio->dev_capability & ~NETIF_F_LRO);
3436 netdev->hw_features = lio->dev_capability;
3437 /*HW_VLAN_RX and HW_VLAN_FILTER is always on*/
3438 netdev->hw_features = netdev->hw_features &
3439 ~NETIF_F_HW_VLAN_CTAG_RX;
3441 /* Point to the properties for octeon device to which this
3442 * interface belongs.
3444 lio->oct_dev = octeon_dev;
3445 lio->octprops = props;
3446 lio->netdev = netdev;
3448 dev_dbg(&octeon_dev->pci_dev->dev,
3449 "if%d gmx: %d hw_addr: 0x%llx\n", i,
3450 lio->linfo.gmxport, CVM_CAST64(lio->linfo.hw_addr));
3452 /* 64-bit swap required on LE machines */
3453 octeon_swap_8B_data(&lio->linfo.hw_addr, 1);
3454 for (j = 0; j < 6; j++)
3455 mac[j] = *((u8 *)(((u8 *)&lio->linfo.hw_addr) + 2 + j));
3457 /* Copy MAC Address to OS network device structure */
3459 ether_addr_copy(netdev->dev_addr, mac);
3461 /* By default all interfaces on a single Octeon uses the same
3464 lio->txq = lio->linfo.txpciq[0].s.q_no;
3465 lio->rxq = lio->linfo.rxpciq[0].s.q_no;
3466 if (setup_io_queues(octeon_dev, i)) {
3467 dev_err(&octeon_dev->pci_dev->dev, "I/O queues creation failed\n");
3468 goto setup_nic_dev_fail;
3471 ifstate_set(lio, LIO_IFSTATE_DROQ_OPS);
3473 lio->tx_qsize = octeon_get_tx_qsize(octeon_dev, lio->txq);
3474 lio->rx_qsize = octeon_get_rx_qsize(octeon_dev, lio->rxq);
3476 if (setup_glists(octeon_dev, lio, num_iqueues)) {
3477 dev_err(&octeon_dev->pci_dev->dev,
3478 "Gather list allocation failed\n");
3479 goto setup_nic_dev_fail;
3482 /* Register ethtool support */
3483 liquidio_set_ethtool_ops(netdev);
3484 octeon_dev->priv_flags = 0x0;
3486 if (netdev->features & NETIF_F_LRO)
3487 liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
3488 OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
3490 liquidio_set_feature(netdev, OCTNET_CMD_ENABLE_VLAN_FILTER, 0);
3492 if ((debug != -1) && (debug & NETIF_MSG_HW))
3493 liquidio_set_feature(netdev,
3494 OCTNET_CMD_VERBOSE_ENABLE, 0);
3496 /* Register the network device with the OS */
3497 if (register_netdev(netdev)) {
3498 dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
3499 goto setup_nic_dev_fail;
3502 dev_dbg(&octeon_dev->pci_dev->dev,
3503 "Setup NIC ifidx:%d mac:%02x%02x%02x%02x%02x%02x\n",
3504 i, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
3505 netif_carrier_off(netdev);
3506 lio->link_changes++;
3508 ifstate_set(lio, LIO_IFSTATE_REGISTERED);
3510 /* Sending command to firmware to enable Rx checksum offload
3511 * by default at the time of setup of Liquidio driver for
3514 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
3515 OCTNET_CMD_RXCSUM_ENABLE);
3516 liquidio_set_feature(netdev, OCTNET_CMD_TNL_TX_CSUM_CTL,
3517 OCTNET_CMD_TXCSUM_ENABLE);
3519 dev_dbg(&octeon_dev->pci_dev->dev,
3520 "NIC ifidx:%d Setup successful\n", i);
3522 octeon_free_soft_command(octeon_dev, sc);
3529 octeon_free_soft_command(octeon_dev, sc);
3532 dev_err(&octeon_dev->pci_dev->dev,
3533 "NIC ifidx:%d Setup failed\n", i);
3534 liquidio_destroy_nic_device(octeon_dev, i);
3540 * \brief initialize the NIC
3541 * @param oct octeon device
3543 * This initialization routine is called once the Octeon device application is
3546 static int liquidio_init_nic_module(struct octeon_device *oct)
3548 struct oct_intrmod_cfg *intrmod_cfg;
3550 int num_nic_ports = CFG_GET_NUM_NIC_PORTS(octeon_get_conf(oct));
3552 dev_dbg(&oct->pci_dev->dev, "Initializing network interfaces\n");
3554 /* only default iq and oq were initialized
3555 * initialize the rest as well
3557 /* run port_config command for each port */
3558 oct->ifcount = num_nic_ports;
3560 memset(oct->props, 0,
3561 sizeof(struct octdev_props) * num_nic_ports);
3563 for (i = 0; i < MAX_OCTEON_LINKS; i++)
3564 oct->props[i].gmxport = -1;
3566 retval = setup_nic_devices(oct);
3568 dev_err(&oct->pci_dev->dev, "Setup NIC devices failed\n");
3569 goto octnet_init_failure;
3572 liquidio_ptp_init(oct);
3574 /* Initialize interrupt moderation params */
3575 intrmod_cfg = &((struct octeon_device *)oct)->intrmod;
3576 intrmod_cfg->rx_enable = 1;
3577 intrmod_cfg->check_intrvl = LIO_INTRMOD_CHECK_INTERVAL;
3578 intrmod_cfg->maxpkt_ratethr = LIO_INTRMOD_MAXPKT_RATETHR;
3579 intrmod_cfg->minpkt_ratethr = LIO_INTRMOD_MINPKT_RATETHR;
3580 intrmod_cfg->rx_maxcnt_trigger = LIO_INTRMOD_RXMAXCNT_TRIGGER;
3581 intrmod_cfg->rx_maxtmr_trigger = LIO_INTRMOD_RXMAXTMR_TRIGGER;
3582 intrmod_cfg->rx_mintmr_trigger = LIO_INTRMOD_RXMINTMR_TRIGGER;
3583 intrmod_cfg->rx_mincnt_trigger = LIO_INTRMOD_RXMINCNT_TRIGGER;
3584 intrmod_cfg->tx_enable = 1;
3585 intrmod_cfg->tx_maxcnt_trigger = LIO_INTRMOD_TXMAXCNT_TRIGGER;
3586 intrmod_cfg->tx_mincnt_trigger = LIO_INTRMOD_TXMINCNT_TRIGGER;
3587 intrmod_cfg->rx_frames = CFG_GET_OQ_INTR_PKT(octeon_get_conf(oct));
3588 intrmod_cfg->rx_usecs = CFG_GET_OQ_INTR_TIME(octeon_get_conf(oct));
3589 dev_dbg(&oct->pci_dev->dev, "Network interfaces ready\n");
3593 octnet_init_failure:
3601 * \brief starter callback that invokes the remaining initialization work after
3602 * the NIC is up and running.
3603 * @param octptr work struct work_struct
3605 static void nic_starter(struct work_struct *work)
3607 struct octeon_device *oct;
3608 struct cavium_wk *wk = (struct cavium_wk *)work;
3610 oct = (struct octeon_device *)wk->ctxptr;
3612 if (atomic_read(&oct->status) == OCT_DEV_RUNNING)
3615 /* If the status of the device is CORE_OK, the core
3616 * application has reported its application type. Call
3617 * any registered handlers now and move to the RUNNING
3620 if (atomic_read(&oct->status) != OCT_DEV_CORE_OK) {
3621 schedule_delayed_work(&oct->nic_poll_work.work,
3622 LIQUIDIO_STARTER_POLL_INTERVAL_MS);
3626 atomic_set(&oct->status, OCT_DEV_RUNNING);
3628 if (oct->app_mode && oct->app_mode == CVM_DRV_NIC_APP) {
3629 dev_dbg(&oct->pci_dev->dev, "Starting NIC module\n");
3631 if (liquidio_init_nic_module(oct))
3632 dev_err(&oct->pci_dev->dev, "NIC initialization failed\n");
3634 handshake[oct->octeon_id].started_ok = 1;
3636 dev_err(&oct->pci_dev->dev,
3637 "Unexpected application running on NIC (%d). Check firmware.\n",
3641 complete(&handshake[oct->octeon_id].started);
3645 * \brief Device initialization for each Octeon device that is probed
3646 * @param octeon_dev octeon device
3648 static int octeon_device_init(struct octeon_device *octeon_dev)
3651 char bootcmd[] = "\n";
3652 struct octeon_device_priv *oct_priv =
3653 (struct octeon_device_priv *)octeon_dev->priv;
3654 atomic_set(&octeon_dev->status, OCT_DEV_BEGIN_STATE);
3656 /* Enable access to the octeon device and make its DMA capability
3659 if (octeon_pci_os_setup(octeon_dev))
3662 /* Identify the Octeon type and map the BAR address space. */
3663 if (octeon_chip_specific_setup(octeon_dev)) {
3664 dev_err(&octeon_dev->pci_dev->dev, "Chip specific setup failed\n");
3668 atomic_set(&octeon_dev->status, OCT_DEV_PCI_MAP_DONE);
3670 octeon_dev->app_mode = CVM_DRV_INVALID_APP;
3672 /* Do a soft reset of the Octeon device. */
3673 if (octeon_dev->fn_list.soft_reset(octeon_dev))
3676 /* Initialize the dispatch mechanism used to push packets arriving on
3677 * Octeon Output queues.
3679 if (octeon_init_dispatch_list(octeon_dev))
3682 octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC,
3683 OPCODE_NIC_CORE_DRV_ACTIVE,
3684 octeon_core_drv_init,
3687 INIT_DELAYED_WORK(&octeon_dev->nic_poll_work.work, nic_starter);
3688 octeon_dev->nic_poll_work.ctxptr = (void *)octeon_dev;
3689 schedule_delayed_work(&octeon_dev->nic_poll_work.work,
3690 LIQUIDIO_STARTER_POLL_INTERVAL_MS);
3692 atomic_set(&octeon_dev->status, OCT_DEV_DISPATCH_INIT_DONE);
3694 octeon_set_io_queues_off(octeon_dev);
3696 if (OCTEON_CN23XX_PF(octeon_dev)) {
3697 ret = octeon_dev->fn_list.setup_device_regs(octeon_dev);
3699 dev_err(&octeon_dev->pci_dev->dev, "OCTEON: Failed to configure device registers\n");
3704 /* Initialize soft command buffer pool
3706 if (octeon_setup_sc_buffer_pool(octeon_dev)) {
3707 dev_err(&octeon_dev->pci_dev->dev, "sc buffer pool allocation failed\n");
3710 atomic_set(&octeon_dev->status, OCT_DEV_SC_BUFF_POOL_INIT_DONE);
3712 /* Setup the data structures that manage this Octeon's Input queues. */
3713 if (octeon_setup_instr_queues(octeon_dev)) {
3714 dev_err(&octeon_dev->pci_dev->dev,
3715 "instruction queue initialization failed\n");
3716 /* On error, release any previously allocated queues */
3717 for (j = 0; j < octeon_dev->num_iqs; j++)
3718 octeon_delete_instr_queue(octeon_dev, j);
3721 atomic_set(&octeon_dev->status, OCT_DEV_INSTR_QUEUE_INIT_DONE);
3723 /* Initialize lists to manage the requests of different types that
3724 * arrive from user & kernel applications for this octeon device.
3726 if (octeon_setup_response_list(octeon_dev)) {
3727 dev_err(&octeon_dev->pci_dev->dev, "Response list allocation failed\n");
3730 atomic_set(&octeon_dev->status, OCT_DEV_RESP_LIST_INIT_DONE);
3732 if (octeon_setup_output_queues(octeon_dev)) {
3733 dev_err(&octeon_dev->pci_dev->dev, "Output queue initialization failed\n");
3734 /* Release any previously allocated queues */
3735 for (j = 0; j < octeon_dev->num_oqs; j++)
3736 octeon_delete_droq(octeon_dev, j);
3740 atomic_set(&octeon_dev->status, OCT_DEV_DROQ_INIT_DONE);
3742 /* The input and output queue registers were setup earlier (the queues
3743 * were not enabled). Any additional registers that need to be
3744 * programmed should be done now.
3746 ret = octeon_dev->fn_list.setup_device_regs(octeon_dev);
3748 dev_err(&octeon_dev->pci_dev->dev,
3749 "Failed to configure device registers\n");
3753 /* Initialize the tasklet that handles output queue packet processing.*/
3754 dev_dbg(&octeon_dev->pci_dev->dev, "Initializing droq tasklet\n");
3755 tasklet_init(&oct_priv->droq_tasklet, octeon_droq_bh,
3756 (unsigned long)octeon_dev);
3758 /* Setup the interrupt handler and record the INT SUM register address
3760 if (octeon_setup_interrupt(octeon_dev))
3763 /* Enable Octeon device interrupts */
3764 octeon_dev->fn_list.enable_interrupt(octeon_dev->chip);
3766 /* Enable the input and output queues for this Octeon device */
3767 ret = octeon_dev->fn_list.enable_io_queues(octeon_dev);
3769 dev_err(&octeon_dev->pci_dev->dev, "Failed to enable input/output queues");
3773 atomic_set(&octeon_dev->status, OCT_DEV_IO_QUEUES_DONE);
3775 dev_dbg(&octeon_dev->pci_dev->dev, "Waiting for DDR initialization...\n");
3777 if (ddr_timeout == 0)
3778 dev_info(&octeon_dev->pci_dev->dev, "WAITING. Set ddr_timeout to non-zero value to proceed with initialization.\n");
3780 schedule_timeout_uninterruptible(HZ * LIO_RESET_SECS);
3782 /* Wait for the octeon to initialize DDR after the soft-reset. */
3783 while (ddr_timeout == 0) {
3784 set_current_state(TASK_INTERRUPTIBLE);
3785 if (schedule_timeout(HZ / 10)) {
3786 /* user probably pressed Control-C */
3790 ret = octeon_wait_for_ddr_init(octeon_dev, &ddr_timeout);
3792 dev_err(&octeon_dev->pci_dev->dev,
3793 "DDR not initialized. Please confirm that board is configured to boot from Flash, ret: %d\n",
3798 if (octeon_wait_for_bootloader(octeon_dev, 1000) != 0) {
3799 dev_err(&octeon_dev->pci_dev->dev, "Board not responding\n");
3803 /* Divert uboot to take commands from host instead. */
3804 ret = octeon_console_send_cmd(octeon_dev, bootcmd, 50);
3806 dev_dbg(&octeon_dev->pci_dev->dev, "Initializing consoles\n");
3807 ret = octeon_init_consoles(octeon_dev);
3809 dev_err(&octeon_dev->pci_dev->dev, "Could not access board consoles\n");
3812 ret = octeon_add_console(octeon_dev, 0);
3814 dev_err(&octeon_dev->pci_dev->dev, "Could not access board console\n");
3818 atomic_set(&octeon_dev->status, OCT_DEV_CONSOLE_INIT_DONE);
3820 dev_dbg(&octeon_dev->pci_dev->dev, "Loading firmware\n");
3821 ret = load_firmware(octeon_dev);
3823 dev_err(&octeon_dev->pci_dev->dev, "Could not load firmware to board\n");
3827 handshake[octeon_dev->octeon_id].init_ok = 1;
3828 complete(&handshake[octeon_dev->octeon_id].init);
3830 atomic_set(&octeon_dev->status, OCT_DEV_HOST_OK);
3832 /* Send Credit for Octeon Output queues. Credits are always sent after
3833 * the output queue is enabled.
3835 for (j = 0; j < octeon_dev->num_oqs; j++)
3836 writel(octeon_dev->droq[j]->max_count,
3837 octeon_dev->droq[j]->pkts_credit_reg);
3839 /* Packets can start arriving on the output queues from this point. */
3845 * \brief Exits the module
3847 static void __exit liquidio_exit(void)
3849 liquidio_deinit_pci();
3851 pr_info("LiquidIO network module is now unloaded\n");
3854 module_init(liquidio_init);
3855 module_exit(liquidio_exit);