2 * Copyright (C) 2015-2017 Netronome Systems, Inc.
4 * This software is dual licensed under the GNU General License Version 2,
5 * June 1991 as shown in the file COPYING in the top-level directory of this
6 * source tree or the BSD 2-Clause License provided below. You have the
7 * option to license this software under the complete terms of either license.
9 * The BSD 2-Clause License:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * 1. Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * 2. Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 * Netronome network device driver: Main entry point
37 * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
38 * Alejandro Lucero <alejandro.lucero@netronome.com>
39 * Jason McMullan <jason.mcmullan@netronome.com>
40 * Rolf Neugebauer <rolf.neugebauer@netronome.com>
43 #include <linux/etherdevice.h>
44 #include <linux/kernel.h>
45 #include <linux/init.h>
46 #include <linux/lockdep.h>
47 #include <linux/pci.h>
48 #include <linux/pci_regs.h>
49 #include <linux/msi.h>
50 #include <linux/random.h>
51 #include <linux/rtnetlink.h>
53 #include "nfpcore/nfp.h"
54 #include "nfpcore/nfp_cpp.h"
55 #include "nfpcore/nfp_nffw.h"
56 #include "nfpcore/nfp_nsp.h"
57 #include "nfpcore/nfp6000_pcie.h"
59 #include "nfp_net_ctrl.h"
60 #include "nfp_net_sriov.h"
65 #define NFP_PF_CSR_SLICE_SIZE (32 * 1024)
68 * nfp_net_get_mac_addr() - Get the MAC address.
70 * @netdev: net_device to set MAC address on
71 * @port: NFP port structure
73 * First try to get the MAC address from NSP ETH table. If that
74 * fails generate a random address.
77 nfp_net_get_mac_addr(struct nfp_pf *pf, struct net_device *netdev,
78 struct nfp_port *port)
80 struct nfp_eth_table_port *eth_port;
82 eth_port = __nfp_port_get_eth_port(port);
84 eth_hw_addr_random(netdev);
88 ether_addr_copy(netdev->dev_addr, eth_port->mac_addr);
89 ether_addr_copy(netdev->perm_addr, eth_port->mac_addr);
92 static struct nfp_eth_table_port *
93 nfp_net_find_port(struct nfp_eth_table *eth_tbl, unsigned int index)
97 for (i = 0; eth_tbl && i < eth_tbl->count; i++)
98 if (eth_tbl->ports[i].index == index)
99 return ð_tbl->ports[i];
104 static int nfp_net_pf_get_num_ports(struct nfp_pf *pf)
106 return nfp_pf_rtsym_read_optional(pf, "nfd_cfg_pf%u_num_ports", 1);
109 static int nfp_net_pf_get_app_id(struct nfp_pf *pf)
111 return nfp_pf_rtsym_read_optional(pf, "_pf%u_net_app_id",
115 static void nfp_net_pf_free_vnic(struct nfp_pf *pf, struct nfp_net *nn)
117 if (nfp_net_is_data_vnic(nn))
118 nfp_app_vnic_free(pf->app, nn);
119 nfp_port_free(nn->port);
120 list_del(&nn->vnic_list);
125 static void nfp_net_pf_free_vnics(struct nfp_pf *pf)
127 struct nfp_net *nn, *next;
129 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list)
130 if (nfp_net_is_data_vnic(nn))
131 nfp_net_pf_free_vnic(pf, nn);
134 static struct nfp_net *
135 nfp_net_pf_alloc_vnic(struct nfp_pf *pf, bool needs_netdev,
136 void __iomem *ctrl_bar, void __iomem *qc_bar,
137 int stride, unsigned int id)
139 u32 tx_base, rx_base, n_tx_rings, n_rx_rings;
143 tx_base = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
144 rx_base = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
145 n_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS);
146 n_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS);
148 /* Allocate and initialise the vNIC */
149 nn = nfp_net_alloc(pf->pdev, needs_netdev, n_tx_rings, n_rx_rings);
154 nfp_net_get_fw_version(&nn->fw_ver, ctrl_bar);
155 nn->dp.ctrl_bar = ctrl_bar;
156 nn->tx_bar = qc_bar + tx_base * NFP_QCP_QUEUE_ADDR_SZ;
157 nn->rx_bar = qc_bar + rx_base * NFP_QCP_QUEUE_ADDR_SZ;
159 nn->stride_rx = stride;
160 nn->stride_tx = stride;
163 err = nfp_app_vnic_alloc(pf->app, nn, id);
171 list_add_tail(&nn->vnic_list, &pf->vnics);
177 nfp_net_pf_init_vnic(struct nfp_pf *pf, struct nfp_net *nn, unsigned int id)
183 err = nfp_net_init(nn);
187 nfp_net_debugfs_vnic_add(nn, pf->ddir);
190 err = nfp_devlink_port_register(pf->app, nn->port);
197 if (nfp_net_is_data_vnic(nn)) {
198 err = nfp_app_vnic_init(pf->app, nn);
200 goto err_devlink_port_clean;
205 err_devlink_port_clean:
207 nfp_devlink_port_unregister(nn->port);
209 nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
215 nfp_net_pf_alloc_vnics(struct nfp_pf *pf, void __iomem *ctrl_bar,
216 void __iomem *qc_bar, int stride)
222 for (i = 0; i < pf->max_data_vnics; i++) {
223 nn = nfp_net_pf_alloc_vnic(pf, true, ctrl_bar, qc_bar,
230 ctrl_bar += NFP_PF_CSR_SLICE_SIZE;
232 /* Kill the vNIC if app init marked it as invalid */
233 if (nn->port && nn->port->type == NFP_PORT_INVALID) {
234 nfp_net_pf_free_vnic(pf, nn);
239 if (list_empty(&pf->vnics))
245 nfp_net_pf_free_vnics(pf);
249 static void nfp_net_pf_clean_vnic(struct nfp_pf *pf, struct nfp_net *nn)
251 if (nfp_net_is_data_vnic(nn))
252 nfp_app_vnic_clean(pf->app, nn);
254 nfp_devlink_port_unregister(nn->port);
255 nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
259 static int nfp_net_pf_alloc_irqs(struct nfp_pf *pf)
261 unsigned int wanted_irqs, num_irqs, vnics_left, irqs_left;
264 /* Get MSI-X vectors */
266 list_for_each_entry(nn, &pf->vnics, vnic_list)
267 wanted_irqs += NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs;
268 pf->irq_entries = kcalloc(wanted_irqs, sizeof(*pf->irq_entries),
270 if (!pf->irq_entries)
273 num_irqs = nfp_net_irqs_alloc(pf->pdev, pf->irq_entries,
274 NFP_NET_MIN_VNIC_IRQS * pf->num_vnics,
277 nfp_warn(pf->cpp, "Unable to allocate MSI-X vectors\n");
278 kfree(pf->irq_entries);
282 /* Distribute IRQs to vNICs */
283 irqs_left = num_irqs;
284 vnics_left = pf->num_vnics;
285 list_for_each_entry(nn, &pf->vnics, vnic_list) {
288 n = min(NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs,
289 DIV_ROUND_UP(irqs_left, vnics_left));
290 nfp_net_irqs_assign(nn, &pf->irq_entries[num_irqs - irqs_left],
299 static void nfp_net_pf_free_irqs(struct nfp_pf *pf)
301 nfp_net_irqs_disable(pf->pdev);
302 kfree(pf->irq_entries);
305 static int nfp_net_pf_init_vnics(struct nfp_pf *pf)
311 /* Finish vNIC init and register */
313 list_for_each_entry(nn, &pf->vnics, vnic_list) {
314 if (!nfp_net_is_data_vnic(nn))
316 err = nfp_net_pf_init_vnic(pf, nn, id);
318 goto err_prev_deinit;
326 list_for_each_entry_continue_reverse(nn, &pf->vnics, vnic_list)
327 if (nfp_net_is_data_vnic(nn))
328 nfp_net_pf_clean_vnic(pf, nn);
333 nfp_net_pf_app_init(struct nfp_pf *pf, u8 __iomem *qc_bar, unsigned int stride)
335 u8 __iomem *ctrl_bar;
338 pf->app = nfp_app_alloc(pf, nfp_net_pf_get_app_id(pf));
340 return PTR_ERR(pf->app);
342 mutex_lock(&pf->lock);
343 err = nfp_app_init(pf->app);
344 mutex_unlock(&pf->lock);
348 if (!nfp_app_needs_ctrl_vnic(pf->app))
351 ctrl_bar = nfp_pf_map_rtsym(pf, "net.ctrl", "_pf%u_net_ctrl_bar",
352 NFP_PF_CSR_SLICE_SIZE, &pf->ctrl_vnic_bar);
353 if (IS_ERR(ctrl_bar)) {
354 nfp_err(pf->cpp, "Failed to find ctrl vNIC memory symbol\n");
355 err = PTR_ERR(ctrl_bar);
359 pf->ctrl_vnic = nfp_net_pf_alloc_vnic(pf, false, ctrl_bar, qc_bar,
361 if (IS_ERR(pf->ctrl_vnic)) {
362 err = PTR_ERR(pf->ctrl_vnic);
369 nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
371 mutex_lock(&pf->lock);
372 nfp_app_clean(pf->app);
373 mutex_unlock(&pf->lock);
375 nfp_app_free(pf->app);
380 static void nfp_net_pf_app_clean(struct nfp_pf *pf)
383 nfp_net_pf_free_vnic(pf, pf->ctrl_vnic);
384 nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
387 mutex_lock(&pf->lock);
388 nfp_app_clean(pf->app);
389 mutex_unlock(&pf->lock);
391 nfp_app_free(pf->app);
395 static int nfp_net_pf_app_start_ctrl(struct nfp_pf *pf)
401 err = nfp_net_pf_init_vnic(pf, pf->ctrl_vnic, 0);
405 err = nfp_ctrl_open(pf->ctrl_vnic);
412 nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
416 static void nfp_net_pf_app_stop_ctrl(struct nfp_pf *pf)
420 nfp_ctrl_close(pf->ctrl_vnic);
421 nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
424 static int nfp_net_pf_app_start(struct nfp_pf *pf)
428 err = nfp_net_pf_app_start_ctrl(pf);
432 err = nfp_app_start(pf->app, pf->ctrl_vnic);
437 err = nfp_app_sriov_enable(pf->app, pf->num_vfs);
445 nfp_app_stop(pf->app);
447 nfp_net_pf_app_stop_ctrl(pf);
451 static void nfp_net_pf_app_stop(struct nfp_pf *pf)
454 nfp_app_sriov_disable(pf->app);
455 nfp_app_stop(pf->app);
456 nfp_net_pf_app_stop_ctrl(pf);
459 static void nfp_net_pci_unmap_mem(struct nfp_pf *pf)
461 if (pf->vfcfg_tbl2_area)
462 nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
464 nfp_cpp_area_release_free(pf->vf_cfg_bar);
465 if (pf->mac_stats_bar)
466 nfp_cpp_area_release_free(pf->mac_stats_bar);
467 nfp_cpp_area_release_free(pf->qc_area);
468 nfp_cpp_area_release_free(pf->data_vnic_bar);
471 static int nfp_net_pci_map_mem(struct nfp_pf *pf)
477 min_size = pf->max_data_vnics * NFP_PF_CSR_SLICE_SIZE;
478 mem = nfp_pf_map_rtsym(pf, "net.bar0", "_pf%d_net_bar0",
479 min_size, &pf->data_vnic_bar);
481 nfp_err(pf->cpp, "Failed to find data vNIC memory symbol\n");
486 min_size = NFP_MAC_STATS_SIZE * (pf->eth_tbl->max_index + 1);
487 pf->mac_stats_mem = nfp_rtsym_map(pf->rtbl, "_mac_stats",
488 "net.macstats", min_size,
490 if (IS_ERR(pf->mac_stats_mem)) {
491 if (PTR_ERR(pf->mac_stats_mem) != -ENOENT) {
492 err = PTR_ERR(pf->mac_stats_mem);
495 pf->mac_stats_mem = NULL;
499 pf->vf_cfg_mem = nfp_pf_map_rtsym(pf, "net.vfcfg", "_pf%d_net_vf_bar",
500 NFP_NET_CFG_BAR_SZ * pf->limit_vfs,
502 if (IS_ERR(pf->vf_cfg_mem)) {
503 if (PTR_ERR(pf->vf_cfg_mem) != -ENOENT) {
504 err = PTR_ERR(pf->vf_cfg_mem);
505 goto err_unmap_mac_stats;
507 pf->vf_cfg_mem = NULL;
510 min_size = NFP_NET_VF_CFG_SZ * pf->limit_vfs + NFP_NET_VF_CFG_MB_SZ;
511 pf->vfcfg_tbl2 = nfp_pf_map_rtsym(pf, "net.vfcfg_tbl2",
513 min_size, &pf->vfcfg_tbl2_area);
514 if (IS_ERR(pf->vfcfg_tbl2)) {
515 if (PTR_ERR(pf->vfcfg_tbl2) != -ENOENT) {
516 err = PTR_ERR(pf->vfcfg_tbl2);
517 goto err_unmap_vf_cfg;
519 pf->vfcfg_tbl2 = NULL;
522 mem = nfp_cpp_map_area(pf->cpp, "net.qc", 0, 0,
523 NFP_PCIE_QUEUE(0), NFP_QCP_QUEUE_AREA_SZ,
526 nfp_err(pf->cpp, "Failed to map Queue Controller area.\n");
528 goto err_unmap_vfcfg_tbl2;
533 err_unmap_vfcfg_tbl2:
534 if (pf->vfcfg_tbl2_area)
535 nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
538 nfp_cpp_area_release_free(pf->vf_cfg_bar);
540 if (pf->mac_stats_bar)
541 nfp_cpp_area_release_free(pf->mac_stats_bar);
543 nfp_cpp_area_release_free(pf->data_vnic_bar);
548 nfp_net_eth_port_update(struct nfp_cpp *cpp, struct nfp_port *port,
549 struct nfp_eth_table *eth_table)
551 struct nfp_eth_table_port *eth_port;
555 eth_port = nfp_net_find_port(eth_table, port->eth_id);
557 set_bit(NFP_PORT_CHANGED, &port->flags);
558 nfp_warn(cpp, "Warning: port #%d not present after reconfig\n",
562 if (eth_port->override_changed) {
563 nfp_warn(cpp, "Port #%d config changed, unregistering. Driver reload required before port will be operational again.\n", port->eth_id);
564 port->type = NFP_PORT_INVALID;
567 memcpy(port->eth_port, eth_port, sizeof(*eth_port));
572 int nfp_net_refresh_port_table_sync(struct nfp_pf *pf)
574 struct nfp_eth_table *eth_table;
575 struct nfp_net *nn, *next;
576 struct nfp_port *port;
579 lockdep_assert_held(&pf->lock);
581 /* Check for nfp_net_pci_remove() racing against us */
582 if (list_empty(&pf->vnics))
585 /* Update state of all ports */
587 list_for_each_entry(port, &pf->ports, port_list)
588 clear_bit(NFP_PORT_CHANGED, &port->flags);
590 eth_table = nfp_eth_read_ports(pf->cpp);
592 list_for_each_entry(port, &pf->ports, port_list)
593 if (__nfp_port_get_eth_port(port))
594 set_bit(NFP_PORT_CHANGED, &port->flags);
596 nfp_err(pf->cpp, "Error refreshing port config!\n");
600 list_for_each_entry(port, &pf->ports, port_list)
601 if (__nfp_port_get_eth_port(port))
602 nfp_net_eth_port_update(pf->cpp, port, eth_table);
607 /* Resync repr state. This may cause reprs to be removed. */
608 err = nfp_reprs_resync_phys_ports(pf->app);
612 /* Shoot off the ports which became invalid */
613 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
614 if (!nn->port || nn->port->type != NFP_PORT_INVALID)
617 nfp_net_pf_clean_vnic(pf, nn);
618 nfp_net_pf_free_vnic(pf, nn);
624 static void nfp_net_refresh_vnics(struct work_struct *work)
626 struct nfp_pf *pf = container_of(work, struct nfp_pf,
629 mutex_lock(&pf->lock);
630 nfp_net_refresh_port_table_sync(pf);
631 mutex_unlock(&pf->lock);
634 void nfp_net_refresh_port_table(struct nfp_port *port)
636 struct nfp_pf *pf = port->app->pf;
638 set_bit(NFP_PORT_CHANGED, &port->flags);
640 queue_work(pf->wq, &pf->port_refresh_work);
643 int nfp_net_refresh_eth_port(struct nfp_port *port)
645 struct nfp_cpp *cpp = port->app->cpp;
646 struct nfp_eth_table *eth_table;
649 clear_bit(NFP_PORT_CHANGED, &port->flags);
651 eth_table = nfp_eth_read_ports(cpp);
653 set_bit(NFP_PORT_CHANGED, &port->flags);
654 nfp_err(cpp, "Error refreshing port state table!\n");
658 ret = nfp_net_eth_port_update(cpp, port, eth_table);
666 * PCI device functions
668 int nfp_net_pci_probe(struct nfp_pf *pf)
670 struct devlink *devlink = priv_to_devlink(pf);
671 struct nfp_net_fw_version fw_ver;
672 u8 __iomem *ctrl_bar, *qc_bar;
676 INIT_WORK(&pf->port_refresh_work, nfp_net_refresh_vnics);
679 nfp_err(pf->cpp, "No %s, giving up.\n",
680 pf->fw_loaded ? "symbol table" : "firmware found");
684 pf->max_data_vnics = nfp_net_pf_get_num_ports(pf);
685 if ((int)pf->max_data_vnics < 0)
686 return pf->max_data_vnics;
688 err = nfp_net_pci_map_mem(pf);
692 ctrl_bar = nfp_cpp_area_iomem(pf->data_vnic_bar);
693 qc_bar = nfp_cpp_area_iomem(pf->qc_area);
694 if (!ctrl_bar || !qc_bar) {
699 nfp_net_get_fw_version(&fw_ver, ctrl_bar);
700 if (fw_ver.resv || fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
701 nfp_err(pf->cpp, "Unknown Firmware ABI %d.%d.%d.%d\n",
702 fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor);
707 /* Determine stride */
708 if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
710 nfp_warn(pf->cpp, "OBSOLETE Firmware detected - VF isolation not available\n");
712 switch (fw_ver.major) {
717 nfp_err(pf->cpp, "Unsupported Firmware ABI %d.%d.%d.%d\n",
718 fw_ver.resv, fw_ver.class,
719 fw_ver.major, fw_ver.minor);
725 err = nfp_net_pf_app_init(pf, qc_bar, stride);
729 err = devlink_register(devlink, &pf->pdev->dev);
733 err = nfp_shared_buf_register(pf);
735 goto err_devlink_unreg;
737 mutex_lock(&pf->lock);
738 pf->ddir = nfp_net_debugfs_device_add(pf->pdev);
740 /* Allocate the vnics and do basic init */
741 err = nfp_net_pf_alloc_vnics(pf, ctrl_bar, qc_bar, stride);
745 err = nfp_net_pf_alloc_irqs(pf);
749 err = nfp_net_pf_app_start(pf);
753 err = nfp_net_pf_init_vnics(pf);
757 mutex_unlock(&pf->lock);
762 nfp_net_pf_app_stop(pf);
764 nfp_net_pf_free_irqs(pf);
766 nfp_net_pf_free_vnics(pf);
768 nfp_net_debugfs_dir_clean(&pf->ddir);
769 mutex_unlock(&pf->lock);
770 nfp_shared_buf_unregister(pf);
772 cancel_work_sync(&pf->port_refresh_work);
773 devlink_unregister(devlink);
775 nfp_net_pf_app_clean(pf);
777 nfp_net_pci_unmap_mem(pf);
781 void nfp_net_pci_remove(struct nfp_pf *pf)
783 struct nfp_net *nn, *next;
785 mutex_lock(&pf->lock);
786 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
787 if (!nfp_net_is_data_vnic(nn))
789 nfp_net_pf_clean_vnic(pf, nn);
790 nfp_net_pf_free_vnic(pf, nn);
793 nfp_net_pf_app_stop(pf);
794 /* stop app first, to avoid double free of ctrl vNIC's ddir */
795 nfp_net_debugfs_dir_clean(&pf->ddir);
797 mutex_unlock(&pf->lock);
799 nfp_shared_buf_unregister(pf);
800 devlink_unregister(priv_to_devlink(pf));
802 nfp_net_pf_free_irqs(pf);
803 nfp_net_pf_app_clean(pf);
804 nfp_net_pci_unmap_mem(pf);
806 cancel_work_sync(&pf->port_refresh_work);