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:
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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"
64 #define NFP_PF_CSR_SLICE_SIZE (32 * 1024)
66 static int nfp_is_ready(struct nfp_pf *pf)
72 cp = nfp_hwinfo_lookup(pf->hwinfo, "board.state");
76 err = kstrtol(cp, 0, &state);
84 * nfp_net_get_mac_addr() - Get the MAC address.
86 * @port: NFP port structure
88 * First try to get the MAC address from NSP ETH table. If that
89 * fails generate a random address.
91 void nfp_net_get_mac_addr(struct nfp_pf *pf, struct nfp_port *port)
93 struct nfp_eth_table_port *eth_port;
95 eth_port = __nfp_port_get_eth_port(port);
97 eth_hw_addr_random(port->netdev);
101 ether_addr_copy(port->netdev->dev_addr, eth_port->mac_addr);
102 ether_addr_copy(port->netdev->perm_addr, eth_port->mac_addr);
105 static struct nfp_eth_table_port *
106 nfp_net_find_port(struct nfp_eth_table *eth_tbl, unsigned int index)
110 for (i = 0; eth_tbl && i < eth_tbl->count; i++)
111 if (eth_tbl->ports[i].index == index)
112 return ð_tbl->ports[i];
118 nfp_net_pf_rtsym_read_optional(struct nfp_pf *pf, const char *format,
119 unsigned int default_val)
125 snprintf(name, sizeof(name), format, nfp_cppcore_pcie_unit(pf->cpp));
127 val = nfp_rtsym_read_le(pf->rtbl, name, &err);
131 nfp_err(pf->cpp, "Unable to read symbol %s\n", name);
138 static int nfp_net_pf_get_num_ports(struct nfp_pf *pf)
140 return nfp_net_pf_rtsym_read_optional(pf, "nfd_cfg_pf%u_num_ports", 1);
143 static int nfp_net_pf_get_app_id(struct nfp_pf *pf)
145 return nfp_net_pf_rtsym_read_optional(pf, "_pf%u_net_app_id",
150 nfp_net_pf_map_rtsym(struct nfp_pf *pf, const char *name, const char *sym_fmt,
151 unsigned int min_size, struct nfp_cpp_area **area)
155 snprintf(pf_symbol, sizeof(pf_symbol), sym_fmt,
156 nfp_cppcore_pcie_unit(pf->cpp));
158 return nfp_rtsym_map(pf->rtbl, pf_symbol, name, min_size, area);
161 static void nfp_net_pf_free_vnic(struct nfp_pf *pf, struct nfp_net *nn)
163 nfp_port_free(nn->port);
164 list_del(&nn->vnic_list);
169 static void nfp_net_pf_free_vnics(struct nfp_pf *pf)
171 struct nfp_net *nn, *next;
173 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list)
174 if (nfp_net_is_data_vnic(nn))
175 nfp_net_pf_free_vnic(pf, nn);
178 static struct nfp_net *
179 nfp_net_pf_alloc_vnic(struct nfp_pf *pf, bool needs_netdev,
180 void __iomem *ctrl_bar, void __iomem *qc_bar,
181 int stride, unsigned int id)
183 u32 tx_base, rx_base, n_tx_rings, n_rx_rings;
187 tx_base = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
188 rx_base = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
189 n_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS);
190 n_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS);
192 /* Allocate and initialise the vNIC */
193 nn = nfp_net_alloc(pf->pdev, needs_netdev, n_tx_rings, n_rx_rings);
198 nfp_net_get_fw_version(&nn->fw_ver, ctrl_bar);
199 nn->dp.ctrl_bar = ctrl_bar;
200 nn->tx_bar = qc_bar + tx_base * NFP_QCP_QUEUE_ADDR_SZ;
201 nn->rx_bar = qc_bar + rx_base * NFP_QCP_QUEUE_ADDR_SZ;
203 nn->stride_rx = stride;
204 nn->stride_tx = stride;
207 err = nfp_app_vnic_init(pf->app, nn, id);
215 list_add_tail(&nn->vnic_list, &pf->vnics);
221 nfp_net_pf_init_vnic(struct nfp_pf *pf, struct nfp_net *nn, unsigned int id)
225 /* Get ME clock frequency from ctrl BAR
226 * XXX for now frequency is hardcoded until we figure out how
227 * to get the value from nfp-hwinfo into ctrl bar
229 nn->me_freq_mhz = 1200;
231 err = nfp_net_init(nn);
235 nfp_net_debugfs_vnic_add(nn, pf->ddir, id);
238 err = nfp_devlink_port_register(pf->app, nn->port);
248 nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
254 nfp_net_pf_alloc_vnics(struct nfp_pf *pf, void __iomem *ctrl_bar,
255 void __iomem *qc_bar, int stride)
261 for (i = 0; i < pf->max_data_vnics; i++) {
262 nn = nfp_net_pf_alloc_vnic(pf, true, ctrl_bar, qc_bar,
269 ctrl_bar += NFP_PF_CSR_SLICE_SIZE;
271 /* Kill the vNIC if app init marked it as invalid */
272 if (nn->port && nn->port->type == NFP_PORT_INVALID) {
273 nfp_net_pf_free_vnic(pf, nn);
278 if (list_empty(&pf->vnics))
284 nfp_net_pf_free_vnics(pf);
288 static void nfp_net_pf_clean_vnic(struct nfp_pf *pf, struct nfp_net *nn)
291 nfp_devlink_port_unregister(nn->port);
292 nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
294 nfp_app_vnic_clean(pf->app, nn);
297 static int nfp_net_pf_alloc_irqs(struct nfp_pf *pf)
299 unsigned int wanted_irqs, num_irqs, vnics_left, irqs_left;
302 /* Get MSI-X vectors */
304 list_for_each_entry(nn, &pf->vnics, vnic_list)
305 wanted_irqs += NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs;
306 pf->irq_entries = kcalloc(wanted_irqs, sizeof(*pf->irq_entries),
308 if (!pf->irq_entries)
311 num_irqs = nfp_net_irqs_alloc(pf->pdev, pf->irq_entries,
312 NFP_NET_MIN_VNIC_IRQS * pf->num_vnics,
315 nfp_warn(pf->cpp, "Unable to allocate MSI-X vectors\n");
316 kfree(pf->irq_entries);
320 /* Distribute IRQs to vNICs */
321 irqs_left = num_irqs;
322 vnics_left = pf->num_vnics;
323 list_for_each_entry(nn, &pf->vnics, vnic_list) {
326 n = min(NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs,
327 DIV_ROUND_UP(irqs_left, vnics_left));
328 nfp_net_irqs_assign(nn, &pf->irq_entries[num_irqs - irqs_left],
337 static void nfp_net_pf_free_irqs(struct nfp_pf *pf)
339 nfp_net_irqs_disable(pf->pdev);
340 kfree(pf->irq_entries);
343 static int nfp_net_pf_init_vnics(struct nfp_pf *pf)
349 /* Finish vNIC init and register */
351 list_for_each_entry(nn, &pf->vnics, vnic_list) {
352 if (!nfp_net_is_data_vnic(nn))
354 err = nfp_net_pf_init_vnic(pf, nn, id);
356 goto err_prev_deinit;
364 list_for_each_entry_continue_reverse(nn, &pf->vnics, vnic_list)
365 if (nfp_net_is_data_vnic(nn))
366 nfp_net_pf_clean_vnic(pf, nn);
371 nfp_net_pf_app_init(struct nfp_pf *pf, u8 __iomem *qc_bar, unsigned int stride)
373 u8 __iomem *ctrl_bar;
376 pf->app = nfp_app_alloc(pf, nfp_net_pf_get_app_id(pf));
378 return PTR_ERR(pf->app);
380 err = nfp_app_init(pf->app);
384 if (!nfp_app_needs_ctrl_vnic(pf->app))
387 ctrl_bar = nfp_net_pf_map_rtsym(pf, "net.ctrl", "_pf%u_net_ctrl_bar",
388 NFP_PF_CSR_SLICE_SIZE,
390 if (IS_ERR(ctrl_bar)) {
391 nfp_err(pf->cpp, "Failed to find data vNIC memory symbol\n");
392 err = PTR_ERR(ctrl_bar);
396 pf->ctrl_vnic = nfp_net_pf_alloc_vnic(pf, false, ctrl_bar, qc_bar,
398 if (IS_ERR(pf->ctrl_vnic)) {
399 err = PTR_ERR(pf->ctrl_vnic);
406 nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
408 nfp_app_clean(pf->app);
410 nfp_app_free(pf->app);
415 static void nfp_net_pf_app_clean(struct nfp_pf *pf)
418 nfp_net_pf_free_vnic(pf, pf->ctrl_vnic);
419 nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
421 nfp_app_clean(pf->app);
422 nfp_app_free(pf->app);
426 static int nfp_net_pf_app_start_ctrl(struct nfp_pf *pf)
432 err = nfp_net_pf_init_vnic(pf, pf->ctrl_vnic, 0);
436 err = nfp_ctrl_open(pf->ctrl_vnic);
443 nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
447 static void nfp_net_pf_app_stop_ctrl(struct nfp_pf *pf)
451 nfp_ctrl_close(pf->ctrl_vnic);
452 nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
455 static int nfp_net_pf_app_start(struct nfp_pf *pf)
459 err = nfp_net_pf_app_start_ctrl(pf);
463 err = nfp_app_start(pf->app, pf->ctrl_vnic);
468 err = nfp_app_sriov_enable(pf->app, pf->num_vfs);
476 nfp_app_stop(pf->app);
478 nfp_net_pf_app_stop_ctrl(pf);
482 static void nfp_net_pf_app_stop(struct nfp_pf *pf)
485 nfp_app_sriov_disable(pf->app);
486 nfp_app_stop(pf->app);
487 nfp_net_pf_app_stop_ctrl(pf);
490 static void nfp_net_pci_unmap_mem(struct nfp_pf *pf)
493 nfp_cpp_area_release_free(pf->vf_cfg_bar);
494 if (pf->mac_stats_bar)
495 nfp_cpp_area_release_free(pf->mac_stats_bar);
496 nfp_cpp_area_release_free(pf->qc_area);
497 nfp_cpp_area_release_free(pf->data_vnic_bar);
500 static int nfp_net_pci_map_mem(struct nfp_pf *pf)
506 min_size = pf->max_data_vnics * NFP_PF_CSR_SLICE_SIZE;
507 mem = nfp_net_pf_map_rtsym(pf, "net.ctrl", "_pf%d_net_bar0",
508 min_size, &pf->data_vnic_bar);
510 nfp_err(pf->cpp, "Failed to find data vNIC memory symbol\n");
514 min_size = NFP_MAC_STATS_SIZE * (pf->eth_tbl->max_index + 1);
515 pf->mac_stats_mem = nfp_rtsym_map(pf->rtbl, "_mac_stats",
516 "net.macstats", min_size,
518 if (IS_ERR(pf->mac_stats_mem)) {
519 if (PTR_ERR(pf->mac_stats_mem) != -ENOENT) {
520 err = PTR_ERR(pf->mac_stats_mem);
523 pf->mac_stats_mem = NULL;
526 pf->vf_cfg_mem = nfp_net_pf_map_rtsym(pf, "net.vfcfg",
529 pf->limit_vfs, &pf->vf_cfg_bar);
530 if (IS_ERR(pf->vf_cfg_mem)) {
531 if (PTR_ERR(pf->vf_cfg_mem) != -ENOENT) {
532 err = PTR_ERR(pf->vf_cfg_mem);
533 goto err_unmap_mac_stats;
535 pf->vf_cfg_mem = NULL;
538 mem = nfp_cpp_map_area(pf->cpp, "net.qc", 0, 0,
539 NFP_PCIE_QUEUE(0), NFP_QCP_QUEUE_AREA_SZ,
542 nfp_err(pf->cpp, "Failed to map Queue Controller area.\n");
544 goto err_unmap_vf_cfg;
551 nfp_cpp_area_release_free(pf->vf_cfg_bar);
553 if (pf->mac_stats_bar)
554 nfp_cpp_area_release_free(pf->mac_stats_bar);
556 nfp_cpp_area_release_free(pf->data_vnic_bar);
560 static void nfp_net_pci_remove_finish(struct nfp_pf *pf)
562 nfp_net_pf_app_stop(pf);
563 /* stop app first, to avoid double free of ctrl vNIC's ddir */
564 nfp_net_debugfs_dir_clean(&pf->ddir);
566 nfp_net_pf_free_irqs(pf);
567 nfp_net_pf_app_clean(pf);
568 nfp_net_pci_unmap_mem(pf);
572 nfp_net_eth_port_update(struct nfp_cpp *cpp, struct nfp_port *port,
573 struct nfp_eth_table *eth_table)
575 struct nfp_eth_table_port *eth_port;
579 eth_port = nfp_net_find_port(eth_table, port->eth_id);
581 set_bit(NFP_PORT_CHANGED, &port->flags);
582 nfp_warn(cpp, "Warning: port #%d not present after reconfig\n",
586 if (eth_port->override_changed) {
587 nfp_warn(cpp, "Port #%d config changed, unregistering. Reboot required before port will be operational again.\n", port->eth_id);
588 port->type = NFP_PORT_INVALID;
591 memcpy(port->eth_port, eth_port, sizeof(*eth_port));
596 int nfp_net_refresh_port_table_sync(struct nfp_pf *pf)
598 struct nfp_eth_table *eth_table;
599 struct nfp_net *nn, *next;
600 struct nfp_port *port;
602 lockdep_assert_held(&pf->lock);
604 /* Check for nfp_net_pci_remove() racing against us */
605 if (list_empty(&pf->vnics))
608 /* Update state of all ports */
610 list_for_each_entry(port, &pf->ports, port_list)
611 clear_bit(NFP_PORT_CHANGED, &port->flags);
613 eth_table = nfp_eth_read_ports(pf->cpp);
615 list_for_each_entry(port, &pf->ports, port_list)
616 if (__nfp_port_get_eth_port(port))
617 set_bit(NFP_PORT_CHANGED, &port->flags);
619 nfp_err(pf->cpp, "Error refreshing port config!\n");
623 list_for_each_entry(port, &pf->ports, port_list)
624 if (__nfp_port_get_eth_port(port))
625 nfp_net_eth_port_update(pf->cpp, port, eth_table);
630 /* Shoot off the ports which became invalid */
631 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
632 if (!nn->port || nn->port->type != NFP_PORT_INVALID)
635 nfp_net_pf_clean_vnic(pf, nn);
636 nfp_net_pf_free_vnic(pf, nn);
639 if (list_empty(&pf->vnics))
640 nfp_net_pci_remove_finish(pf);
645 static void nfp_net_refresh_vnics(struct work_struct *work)
647 struct nfp_pf *pf = container_of(work, struct nfp_pf,
650 mutex_lock(&pf->lock);
651 nfp_net_refresh_port_table_sync(pf);
652 mutex_unlock(&pf->lock);
655 void nfp_net_refresh_port_table(struct nfp_port *port)
657 struct nfp_pf *pf = port->app->pf;
659 set_bit(NFP_PORT_CHANGED, &port->flags);
661 queue_work(pf->wq, &pf->port_refresh_work);
664 int nfp_net_refresh_eth_port(struct nfp_port *port)
666 struct nfp_cpp *cpp = port->app->cpp;
667 struct nfp_eth_table *eth_table;
670 clear_bit(NFP_PORT_CHANGED, &port->flags);
672 eth_table = nfp_eth_read_ports(cpp);
674 set_bit(NFP_PORT_CHANGED, &port->flags);
675 nfp_err(cpp, "Error refreshing port state table!\n");
679 ret = nfp_net_eth_port_update(cpp, port, eth_table);
687 * PCI device functions
689 int nfp_net_pci_probe(struct nfp_pf *pf)
691 struct nfp_net_fw_version fw_ver;
692 u8 __iomem *ctrl_bar, *qc_bar;
696 INIT_WORK(&pf->port_refresh_work, nfp_net_refresh_vnics);
698 /* Verify that the board has completed initialization */
699 if (!nfp_is_ready(pf)) {
700 nfp_err(pf->cpp, "NFP is not ready for NIC operation.\n");
705 nfp_err(pf->cpp, "No %s, giving up.\n",
706 pf->fw_loaded ? "symbol table" : "firmware found");
707 return -EPROBE_DEFER;
710 mutex_lock(&pf->lock);
711 pf->max_data_vnics = nfp_net_pf_get_num_ports(pf);
712 if ((int)pf->max_data_vnics < 0) {
713 err = pf->max_data_vnics;
717 err = nfp_net_pci_map_mem(pf);
721 ctrl_bar = nfp_cpp_area_iomem(pf->data_vnic_bar);
722 qc_bar = nfp_cpp_area_iomem(pf->qc_area);
723 if (!ctrl_bar || !qc_bar) {
728 nfp_net_get_fw_version(&fw_ver, ctrl_bar);
729 if (fw_ver.resv || fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
730 nfp_err(pf->cpp, "Unknown Firmware ABI %d.%d.%d.%d\n",
731 fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor);
736 /* Determine stride */
737 if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
739 nfp_warn(pf->cpp, "OBSOLETE Firmware detected - VF isolation not available\n");
741 switch (fw_ver.major) {
746 nfp_err(pf->cpp, "Unsupported Firmware ABI %d.%d.%d.%d\n",
747 fw_ver.resv, fw_ver.class,
748 fw_ver.major, fw_ver.minor);
754 err = nfp_net_pf_app_init(pf, qc_bar, stride);
758 pf->ddir = nfp_net_debugfs_device_add(pf->pdev);
760 /* Allocate the vnics and do basic init */
761 err = nfp_net_pf_alloc_vnics(pf, ctrl_bar, qc_bar, stride);
765 err = nfp_net_pf_alloc_irqs(pf);
769 err = nfp_net_pf_app_start(pf);
773 err = nfp_net_pf_init_vnics(pf);
777 mutex_unlock(&pf->lock);
782 nfp_net_pf_app_stop(pf);
784 nfp_net_pf_free_irqs(pf);
786 nfp_net_pf_free_vnics(pf);
788 nfp_net_debugfs_dir_clean(&pf->ddir);
789 nfp_net_pf_app_clean(pf);
791 nfp_net_pci_unmap_mem(pf);
793 mutex_unlock(&pf->lock);
794 cancel_work_sync(&pf->port_refresh_work);
798 void nfp_net_pci_remove(struct nfp_pf *pf)
802 mutex_lock(&pf->lock);
803 if (list_empty(&pf->vnics))
806 list_for_each_entry(nn, &pf->vnics, vnic_list)
807 if (nfp_net_is_data_vnic(nn))
808 nfp_net_pf_clean_vnic(pf, nn);
810 nfp_net_pf_free_vnics(pf);
812 nfp_net_pci_remove_finish(pf);
814 mutex_unlock(&pf->lock);
816 cancel_work_sync(&pf->port_refresh_work);