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];
105 nfp_net_pf_rtsym_read_optional(struct nfp_pf *pf, const char *format,
106 unsigned int default_val)
112 snprintf(name, sizeof(name), format, nfp_cppcore_pcie_unit(pf->cpp));
114 val = nfp_rtsym_read_le(pf->rtbl, name, &err);
118 nfp_err(pf->cpp, "Unable to read symbol %s\n", name);
125 static int nfp_net_pf_get_num_ports(struct nfp_pf *pf)
127 return nfp_net_pf_rtsym_read_optional(pf, "nfd_cfg_pf%u_num_ports", 1);
130 static int nfp_net_pf_get_app_id(struct nfp_pf *pf)
132 return nfp_net_pf_rtsym_read_optional(pf, "_pf%u_net_app_id",
137 nfp_net_pf_map_rtsym(struct nfp_pf *pf, const char *name, const char *sym_fmt,
138 unsigned int min_size, struct nfp_cpp_area **area)
142 snprintf(pf_symbol, sizeof(pf_symbol), sym_fmt,
143 nfp_cppcore_pcie_unit(pf->cpp));
145 return nfp_rtsym_map(pf->rtbl, pf_symbol, name, min_size, area);
148 static void nfp_net_pf_free_vnic(struct nfp_pf *pf, struct nfp_net *nn)
150 if (nfp_net_is_data_vnic(nn))
151 nfp_app_vnic_free(pf->app, nn);
152 nfp_port_free(nn->port);
153 list_del(&nn->vnic_list);
158 static void nfp_net_pf_free_vnics(struct nfp_pf *pf)
160 struct nfp_net *nn, *next;
162 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list)
163 if (nfp_net_is_data_vnic(nn))
164 nfp_net_pf_free_vnic(pf, nn);
167 static struct nfp_net *
168 nfp_net_pf_alloc_vnic(struct nfp_pf *pf, bool needs_netdev,
169 void __iomem *ctrl_bar, void __iomem *qc_bar,
170 int stride, unsigned int id)
172 u32 tx_base, rx_base, n_tx_rings, n_rx_rings;
176 tx_base = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
177 rx_base = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
178 n_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS);
179 n_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS);
181 /* Allocate and initialise the vNIC */
182 nn = nfp_net_alloc(pf->pdev, needs_netdev, n_tx_rings, n_rx_rings);
187 nfp_net_get_fw_version(&nn->fw_ver, ctrl_bar);
188 nn->dp.ctrl_bar = ctrl_bar;
189 nn->tx_bar = qc_bar + tx_base * NFP_QCP_QUEUE_ADDR_SZ;
190 nn->rx_bar = qc_bar + rx_base * NFP_QCP_QUEUE_ADDR_SZ;
192 nn->stride_rx = stride;
193 nn->stride_tx = stride;
196 err = nfp_app_vnic_alloc(pf->app, nn, id);
204 list_add_tail(&nn->vnic_list, &pf->vnics);
210 nfp_net_pf_init_vnic(struct nfp_pf *pf, struct nfp_net *nn, unsigned int id)
214 err = nfp_net_init(nn);
218 nfp_net_debugfs_vnic_add(nn, pf->ddir, id);
221 err = nfp_devlink_port_register(pf->app, nn->port);
228 if (nfp_net_is_data_vnic(nn)) {
229 err = nfp_app_vnic_init(pf->app, nn);
231 goto err_devlink_port_clean;
236 err_devlink_port_clean:
238 nfp_devlink_port_unregister(nn->port);
240 nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
246 nfp_net_pf_alloc_vnics(struct nfp_pf *pf, void __iomem *ctrl_bar,
247 void __iomem *qc_bar, int stride)
253 for (i = 0; i < pf->max_data_vnics; i++) {
254 nn = nfp_net_pf_alloc_vnic(pf, true, ctrl_bar, qc_bar,
261 ctrl_bar += NFP_PF_CSR_SLICE_SIZE;
263 /* Kill the vNIC if app init marked it as invalid */
264 if (nn->port && nn->port->type == NFP_PORT_INVALID) {
265 nfp_net_pf_free_vnic(pf, nn);
270 if (list_empty(&pf->vnics))
276 nfp_net_pf_free_vnics(pf);
280 static void nfp_net_pf_clean_vnic(struct nfp_pf *pf, struct nfp_net *nn)
282 if (nfp_net_is_data_vnic(nn))
283 nfp_app_vnic_clean(pf->app, nn);
285 nfp_devlink_port_unregister(nn->port);
286 nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
290 static int nfp_net_pf_alloc_irqs(struct nfp_pf *pf)
292 unsigned int wanted_irqs, num_irqs, vnics_left, irqs_left;
295 /* Get MSI-X vectors */
297 list_for_each_entry(nn, &pf->vnics, vnic_list)
298 wanted_irqs += NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs;
299 pf->irq_entries = kcalloc(wanted_irqs, sizeof(*pf->irq_entries),
301 if (!pf->irq_entries)
304 num_irqs = nfp_net_irqs_alloc(pf->pdev, pf->irq_entries,
305 NFP_NET_MIN_VNIC_IRQS * pf->num_vnics,
308 nfp_warn(pf->cpp, "Unable to allocate MSI-X vectors\n");
309 kfree(pf->irq_entries);
313 /* Distribute IRQs to vNICs */
314 irqs_left = num_irqs;
315 vnics_left = pf->num_vnics;
316 list_for_each_entry(nn, &pf->vnics, vnic_list) {
319 n = min(NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs,
320 DIV_ROUND_UP(irqs_left, vnics_left));
321 nfp_net_irqs_assign(nn, &pf->irq_entries[num_irqs - irqs_left],
330 static void nfp_net_pf_free_irqs(struct nfp_pf *pf)
332 nfp_net_irqs_disable(pf->pdev);
333 kfree(pf->irq_entries);
336 static int nfp_net_pf_init_vnics(struct nfp_pf *pf)
342 /* Finish vNIC init and register */
344 list_for_each_entry(nn, &pf->vnics, vnic_list) {
345 if (!nfp_net_is_data_vnic(nn))
347 err = nfp_net_pf_init_vnic(pf, nn, id);
349 goto err_prev_deinit;
357 list_for_each_entry_continue_reverse(nn, &pf->vnics, vnic_list)
358 if (nfp_net_is_data_vnic(nn))
359 nfp_net_pf_clean_vnic(pf, nn);
364 nfp_net_pf_app_init(struct nfp_pf *pf, u8 __iomem *qc_bar, unsigned int stride)
366 u8 __iomem *ctrl_bar;
369 pf->app = nfp_app_alloc(pf, nfp_net_pf_get_app_id(pf));
371 return PTR_ERR(pf->app);
373 mutex_lock(&pf->lock);
374 err = nfp_app_init(pf->app);
375 mutex_unlock(&pf->lock);
379 if (!nfp_app_needs_ctrl_vnic(pf->app))
382 ctrl_bar = nfp_net_pf_map_rtsym(pf, "net.ctrl", "_pf%u_net_ctrl_bar",
383 NFP_PF_CSR_SLICE_SIZE,
385 if (IS_ERR(ctrl_bar)) {
386 nfp_err(pf->cpp, "Failed to find ctrl vNIC memory symbol\n");
387 err = PTR_ERR(ctrl_bar);
391 pf->ctrl_vnic = nfp_net_pf_alloc_vnic(pf, false, ctrl_bar, qc_bar,
393 if (IS_ERR(pf->ctrl_vnic)) {
394 err = PTR_ERR(pf->ctrl_vnic);
401 nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
403 mutex_lock(&pf->lock);
404 nfp_app_clean(pf->app);
405 mutex_unlock(&pf->lock);
407 nfp_app_free(pf->app);
412 static void nfp_net_pf_app_clean(struct nfp_pf *pf)
415 nfp_net_pf_free_vnic(pf, pf->ctrl_vnic);
416 nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
419 mutex_lock(&pf->lock);
420 nfp_app_clean(pf->app);
421 mutex_unlock(&pf->lock);
423 nfp_app_free(pf->app);
427 static int nfp_net_pf_app_start_ctrl(struct nfp_pf *pf)
433 err = nfp_net_pf_init_vnic(pf, pf->ctrl_vnic, 0);
437 err = nfp_ctrl_open(pf->ctrl_vnic);
444 nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
448 static void nfp_net_pf_app_stop_ctrl(struct nfp_pf *pf)
452 nfp_ctrl_close(pf->ctrl_vnic);
453 nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
456 static int nfp_net_pf_app_start(struct nfp_pf *pf)
460 err = nfp_net_pf_app_start_ctrl(pf);
464 err = nfp_app_start(pf->app, pf->ctrl_vnic);
469 err = nfp_app_sriov_enable(pf->app, pf->num_vfs);
477 nfp_app_stop(pf->app);
479 nfp_net_pf_app_stop_ctrl(pf);
483 static void nfp_net_pf_app_stop(struct nfp_pf *pf)
486 nfp_app_sriov_disable(pf->app);
487 nfp_app_stop(pf->app);
488 nfp_net_pf_app_stop_ctrl(pf);
491 static void nfp_net_pci_unmap_mem(struct nfp_pf *pf)
493 if (pf->vfcfg_tbl2_area)
494 nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
496 nfp_cpp_area_release_free(pf->vf_cfg_bar);
497 if (pf->mac_stats_bar)
498 nfp_cpp_area_release_free(pf->mac_stats_bar);
499 nfp_cpp_area_release_free(pf->qc_area);
500 nfp_cpp_area_release_free(pf->data_vnic_bar);
503 static int nfp_net_pci_map_mem(struct nfp_pf *pf)
509 min_size = pf->max_data_vnics * NFP_PF_CSR_SLICE_SIZE;
510 mem = nfp_net_pf_map_rtsym(pf, "net.bar0", "_pf%d_net_bar0",
511 min_size, &pf->data_vnic_bar);
513 nfp_err(pf->cpp, "Failed to find data vNIC memory symbol\n");
518 min_size = NFP_MAC_STATS_SIZE * (pf->eth_tbl->max_index + 1);
519 pf->mac_stats_mem = nfp_rtsym_map(pf->rtbl, "_mac_stats",
520 "net.macstats", min_size,
522 if (IS_ERR(pf->mac_stats_mem)) {
523 if (PTR_ERR(pf->mac_stats_mem) != -ENOENT) {
524 err = PTR_ERR(pf->mac_stats_mem);
527 pf->mac_stats_mem = NULL;
531 pf->vf_cfg_mem = nfp_net_pf_map_rtsym(pf, "net.vfcfg",
534 pf->limit_vfs, &pf->vf_cfg_bar);
535 if (IS_ERR(pf->vf_cfg_mem)) {
536 if (PTR_ERR(pf->vf_cfg_mem) != -ENOENT) {
537 err = PTR_ERR(pf->vf_cfg_mem);
538 goto err_unmap_mac_stats;
540 pf->vf_cfg_mem = NULL;
543 min_size = NFP_NET_VF_CFG_SZ * pf->limit_vfs + NFP_NET_VF_CFG_MB_SZ;
544 pf->vfcfg_tbl2 = nfp_net_pf_map_rtsym(pf, "net.vfcfg_tbl2",
546 min_size, &pf->vfcfg_tbl2_area);
547 if (IS_ERR(pf->vfcfg_tbl2)) {
548 if (PTR_ERR(pf->vfcfg_tbl2) != -ENOENT) {
549 err = PTR_ERR(pf->vfcfg_tbl2);
550 goto err_unmap_vf_cfg;
552 pf->vfcfg_tbl2 = NULL;
555 mem = nfp_cpp_map_area(pf->cpp, "net.qc", 0, 0,
556 NFP_PCIE_QUEUE(0), NFP_QCP_QUEUE_AREA_SZ,
559 nfp_err(pf->cpp, "Failed to map Queue Controller area.\n");
561 goto err_unmap_vfcfg_tbl2;
566 err_unmap_vfcfg_tbl2:
567 if (pf->vfcfg_tbl2_area)
568 nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
571 nfp_cpp_area_release_free(pf->vf_cfg_bar);
573 if (pf->mac_stats_bar)
574 nfp_cpp_area_release_free(pf->mac_stats_bar);
576 nfp_cpp_area_release_free(pf->data_vnic_bar);
581 nfp_net_eth_port_update(struct nfp_cpp *cpp, struct nfp_port *port,
582 struct nfp_eth_table *eth_table)
584 struct nfp_eth_table_port *eth_port;
588 eth_port = nfp_net_find_port(eth_table, port->eth_id);
590 set_bit(NFP_PORT_CHANGED, &port->flags);
591 nfp_warn(cpp, "Warning: port #%d not present after reconfig\n",
595 if (eth_port->override_changed) {
596 nfp_warn(cpp, "Port #%d config changed, unregistering. Driver reload required before port will be operational again.\n", port->eth_id);
597 port->type = NFP_PORT_INVALID;
600 memcpy(port->eth_port, eth_port, sizeof(*eth_port));
605 int nfp_net_refresh_port_table_sync(struct nfp_pf *pf)
607 struct nfp_eth_table *eth_table;
608 struct nfp_net *nn, *next;
609 struct nfp_port *port;
612 lockdep_assert_held(&pf->lock);
614 /* Check for nfp_net_pci_remove() racing against us */
615 if (list_empty(&pf->vnics))
618 /* Update state of all ports */
620 list_for_each_entry(port, &pf->ports, port_list)
621 clear_bit(NFP_PORT_CHANGED, &port->flags);
623 eth_table = nfp_eth_read_ports(pf->cpp);
625 list_for_each_entry(port, &pf->ports, port_list)
626 if (__nfp_port_get_eth_port(port))
627 set_bit(NFP_PORT_CHANGED, &port->flags);
629 nfp_err(pf->cpp, "Error refreshing port config!\n");
633 list_for_each_entry(port, &pf->ports, port_list)
634 if (__nfp_port_get_eth_port(port))
635 nfp_net_eth_port_update(pf->cpp, port, eth_table);
640 /* Resync repr state. This may cause reprs to be removed. */
641 err = nfp_reprs_resync_phys_ports(pf->app);
645 /* Shoot off the ports which became invalid */
646 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
647 if (!nn->port || nn->port->type != NFP_PORT_INVALID)
650 nfp_net_pf_clean_vnic(pf, nn);
651 nfp_net_pf_free_vnic(pf, nn);
657 static void nfp_net_refresh_vnics(struct work_struct *work)
659 struct nfp_pf *pf = container_of(work, struct nfp_pf,
662 mutex_lock(&pf->lock);
663 nfp_net_refresh_port_table_sync(pf);
664 mutex_unlock(&pf->lock);
667 void nfp_net_refresh_port_table(struct nfp_port *port)
669 struct nfp_pf *pf = port->app->pf;
671 set_bit(NFP_PORT_CHANGED, &port->flags);
673 queue_work(pf->wq, &pf->port_refresh_work);
676 int nfp_net_refresh_eth_port(struct nfp_port *port)
678 struct nfp_cpp *cpp = port->app->cpp;
679 struct nfp_eth_table *eth_table;
682 clear_bit(NFP_PORT_CHANGED, &port->flags);
684 eth_table = nfp_eth_read_ports(cpp);
686 set_bit(NFP_PORT_CHANGED, &port->flags);
687 nfp_err(cpp, "Error refreshing port state table!\n");
691 ret = nfp_net_eth_port_update(cpp, port, eth_table);
699 * PCI device functions
701 int nfp_net_pci_probe(struct nfp_pf *pf)
703 struct devlink *devlink = priv_to_devlink(pf);
704 struct nfp_net_fw_version fw_ver;
705 u8 __iomem *ctrl_bar, *qc_bar;
709 INIT_WORK(&pf->port_refresh_work, nfp_net_refresh_vnics);
712 nfp_err(pf->cpp, "No %s, giving up.\n",
713 pf->fw_loaded ? "symbol table" : "firmware found");
717 pf->max_data_vnics = nfp_net_pf_get_num_ports(pf);
718 if ((int)pf->max_data_vnics < 0)
719 return pf->max_data_vnics;
721 err = nfp_net_pci_map_mem(pf);
725 ctrl_bar = nfp_cpp_area_iomem(pf->data_vnic_bar);
726 qc_bar = nfp_cpp_area_iomem(pf->qc_area);
727 if (!ctrl_bar || !qc_bar) {
732 nfp_net_get_fw_version(&fw_ver, ctrl_bar);
733 if (fw_ver.resv || fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
734 nfp_err(pf->cpp, "Unknown Firmware ABI %d.%d.%d.%d\n",
735 fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor);
740 /* Determine stride */
741 if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
743 nfp_warn(pf->cpp, "OBSOLETE Firmware detected - VF isolation not available\n");
745 switch (fw_ver.major) {
750 nfp_err(pf->cpp, "Unsupported Firmware ABI %d.%d.%d.%d\n",
751 fw_ver.resv, fw_ver.class,
752 fw_ver.major, fw_ver.minor);
758 err = nfp_net_pf_app_init(pf, qc_bar, stride);
762 err = devlink_register(devlink, &pf->pdev->dev);
766 mutex_lock(&pf->lock);
767 pf->ddir = nfp_net_debugfs_device_add(pf->pdev);
769 /* Allocate the vnics and do basic init */
770 err = nfp_net_pf_alloc_vnics(pf, ctrl_bar, qc_bar, stride);
774 err = nfp_net_pf_alloc_irqs(pf);
778 err = nfp_net_pf_app_start(pf);
782 err = nfp_net_pf_init_vnics(pf);
786 mutex_unlock(&pf->lock);
791 nfp_net_pf_app_stop(pf);
793 nfp_net_pf_free_irqs(pf);
795 nfp_net_pf_free_vnics(pf);
797 nfp_net_debugfs_dir_clean(&pf->ddir);
798 mutex_unlock(&pf->lock);
799 cancel_work_sync(&pf->port_refresh_work);
800 devlink_unregister(devlink);
802 nfp_net_pf_app_clean(pf);
804 nfp_net_pci_unmap_mem(pf);
808 void nfp_net_pci_remove(struct nfp_pf *pf)
810 struct nfp_net *nn, *next;
812 mutex_lock(&pf->lock);
813 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
814 if (!nfp_net_is_data_vnic(nn))
816 nfp_net_pf_clean_vnic(pf, nn);
817 nfp_net_pf_free_vnic(pf, nn);
820 nfp_net_pf_app_stop(pf);
821 /* stop app first, to avoid double free of ctrl vNIC's ddir */
822 nfp_net_debugfs_dir_clean(&pf->ddir);
824 mutex_unlock(&pf->lock);
826 devlink_unregister(priv_to_devlink(pf));
828 nfp_net_pf_free_irqs(pf);
829 nfp_net_pf_app_clean(pf);
830 nfp_net_pci_unmap_mem(pf);
832 cancel_work_sync(&pf->port_refresh_work);