1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2015-2018 Netronome Systems, Inc. */
6 * Netronome network device driver: Main entry point
7 * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
8 * Alejandro Lucero <alejandro.lucero@netronome.com>
9 * Jason McMullan <jason.mcmullan@netronome.com>
10 * Rolf Neugebauer <rolf.neugebauer@netronome.com>
13 #include <linux/etherdevice.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/lockdep.h>
17 #include <linux/pci.h>
18 #include <linux/pci_regs.h>
19 #include <linux/msi.h>
20 #include <linux/random.h>
21 #include <linux/rtnetlink.h>
23 #include "nfpcore/nfp.h"
24 #include "nfpcore/nfp_cpp.h"
25 #include "nfpcore/nfp_nffw.h"
26 #include "nfpcore/nfp_nsp.h"
27 #include "nfpcore/nfp6000_pcie.h"
29 #include "nfp_net_ctrl.h"
30 #include "nfp_net_sriov.h"
35 #define NFP_PF_CSR_SLICE_SIZE (32 * 1024)
38 * nfp_net_get_mac_addr() - Get the MAC address.
40 * @netdev: net_device to set MAC address on
41 * @port: NFP port structure
43 * First try to get the MAC address from NSP ETH table. If that
44 * fails generate a random address.
47 nfp_net_get_mac_addr(struct nfp_pf *pf, struct net_device *netdev,
48 struct nfp_port *port)
50 struct nfp_eth_table_port *eth_port;
52 eth_port = __nfp_port_get_eth_port(port);
54 eth_hw_addr_random(netdev);
58 ether_addr_copy(netdev->dev_addr, eth_port->mac_addr);
59 ether_addr_copy(netdev->perm_addr, eth_port->mac_addr);
62 static struct nfp_eth_table_port *
63 nfp_net_find_port(struct nfp_eth_table *eth_tbl, unsigned int index)
67 for (i = 0; eth_tbl && i < eth_tbl->count; i++)
68 if (eth_tbl->ports[i].index == index)
69 return ð_tbl->ports[i];
74 static int nfp_net_pf_get_num_ports(struct nfp_pf *pf)
76 return nfp_pf_rtsym_read_optional(pf, "nfd_cfg_pf%u_num_ports", 1);
79 static int nfp_net_pf_get_app_id(struct nfp_pf *pf)
81 return nfp_pf_rtsym_read_optional(pf, "_pf%u_net_app_id",
85 static void nfp_net_pf_free_vnic(struct nfp_pf *pf, struct nfp_net *nn)
87 if (nfp_net_is_data_vnic(nn))
88 nfp_app_vnic_free(pf->app, nn);
89 nfp_port_free(nn->port);
90 list_del(&nn->vnic_list);
95 static void nfp_net_pf_free_vnics(struct nfp_pf *pf)
97 struct nfp_net *nn, *next;
99 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list)
100 if (nfp_net_is_data_vnic(nn))
101 nfp_net_pf_free_vnic(pf, nn);
104 static struct nfp_net *
105 nfp_net_pf_alloc_vnic(struct nfp_pf *pf, bool needs_netdev,
106 void __iomem *ctrl_bar, void __iomem *qc_bar,
107 int stride, unsigned int id)
109 u32 tx_base, rx_base, n_tx_rings, n_rx_rings;
113 tx_base = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
114 rx_base = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
115 n_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS);
116 n_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS);
118 /* Allocate and initialise the vNIC */
119 nn = nfp_net_alloc(pf->pdev, ctrl_bar, needs_netdev,
120 n_tx_rings, n_rx_rings);
125 nfp_net_get_fw_version(&nn->fw_ver, ctrl_bar);
126 nn->tx_bar = qc_bar + tx_base * NFP_QCP_QUEUE_ADDR_SZ;
127 nn->rx_bar = qc_bar + rx_base * NFP_QCP_QUEUE_ADDR_SZ;
129 nn->stride_rx = stride;
130 nn->stride_tx = stride;
133 err = nfp_app_vnic_alloc(pf->app, nn, id);
141 list_add_tail(&nn->vnic_list, &pf->vnics);
147 nfp_net_pf_init_vnic(struct nfp_pf *pf, struct nfp_net *nn, unsigned int id)
154 err = nfp_devlink_port_register(pf->app, nn->port);
159 err = nfp_net_init(nn);
161 goto err_devlink_port_clean;
163 nfp_net_debugfs_vnic_add(nn, pf->ddir);
166 nfp_devlink_port_type_eth_set(nn->port);
170 if (nfp_net_is_data_vnic(nn)) {
171 err = nfp_app_vnic_init(pf->app, nn);
173 goto err_devlink_port_type_clean;
178 err_devlink_port_type_clean:
180 nfp_devlink_port_type_clear(nn->port);
181 nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
183 err_devlink_port_clean:
185 nfp_devlink_port_unregister(nn->port);
190 nfp_net_pf_alloc_vnics(struct nfp_pf *pf, void __iomem *ctrl_bar,
191 void __iomem *qc_bar, int stride)
197 for (i = 0; i < pf->max_data_vnics; i++) {
198 nn = nfp_net_pf_alloc_vnic(pf, true, ctrl_bar, qc_bar,
205 ctrl_bar += NFP_PF_CSR_SLICE_SIZE;
207 /* Kill the vNIC if app init marked it as invalid */
208 if (nn->port && nn->port->type == NFP_PORT_INVALID)
209 nfp_net_pf_free_vnic(pf, nn);
212 if (list_empty(&pf->vnics))
218 nfp_net_pf_free_vnics(pf);
222 static void nfp_net_pf_clean_vnic(struct nfp_pf *pf, struct nfp_net *nn)
224 if (nfp_net_is_data_vnic(nn))
225 nfp_app_vnic_clean(pf->app, nn);
227 nfp_devlink_port_type_clear(nn->port);
228 nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
231 nfp_devlink_port_unregister(nn->port);
234 static int nfp_net_pf_alloc_irqs(struct nfp_pf *pf)
236 unsigned int wanted_irqs, num_irqs, vnics_left, irqs_left;
239 /* Get MSI-X vectors */
241 list_for_each_entry(nn, &pf->vnics, vnic_list)
242 wanted_irqs += NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs;
243 pf->irq_entries = kcalloc(wanted_irqs, sizeof(*pf->irq_entries),
245 if (!pf->irq_entries)
248 num_irqs = nfp_net_irqs_alloc(pf->pdev, pf->irq_entries,
249 NFP_NET_MIN_VNIC_IRQS * pf->num_vnics,
252 nfp_warn(pf->cpp, "Unable to allocate MSI-X vectors\n");
253 kfree(pf->irq_entries);
257 /* Distribute IRQs to vNICs */
258 irqs_left = num_irqs;
259 vnics_left = pf->num_vnics;
260 list_for_each_entry(nn, &pf->vnics, vnic_list) {
263 n = min(NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs,
264 DIV_ROUND_UP(irqs_left, vnics_left));
265 nfp_net_irqs_assign(nn, &pf->irq_entries[num_irqs - irqs_left],
274 static void nfp_net_pf_free_irqs(struct nfp_pf *pf)
276 nfp_net_irqs_disable(pf->pdev);
277 kfree(pf->irq_entries);
280 static int nfp_net_pf_init_vnics(struct nfp_pf *pf)
286 /* Finish vNIC init and register */
288 list_for_each_entry(nn, &pf->vnics, vnic_list) {
289 if (!nfp_net_is_data_vnic(nn))
291 err = nfp_net_pf_init_vnic(pf, nn, id);
293 goto err_prev_deinit;
301 list_for_each_entry_continue_reverse(nn, &pf->vnics, vnic_list)
302 if (nfp_net_is_data_vnic(nn))
303 nfp_net_pf_clean_vnic(pf, nn);
308 nfp_net_pf_app_init(struct nfp_pf *pf, u8 __iomem *qc_bar, unsigned int stride)
310 u8 __iomem *ctrl_bar;
313 pf->app = nfp_app_alloc(pf, nfp_net_pf_get_app_id(pf));
315 return PTR_ERR(pf->app);
317 mutex_lock(&pf->lock);
318 err = nfp_app_init(pf->app);
319 mutex_unlock(&pf->lock);
323 if (!nfp_app_needs_ctrl_vnic(pf->app))
326 ctrl_bar = nfp_pf_map_rtsym(pf, "net.ctrl", "_pf%u_net_ctrl_bar",
327 NFP_PF_CSR_SLICE_SIZE, &pf->ctrl_vnic_bar);
328 if (IS_ERR(ctrl_bar)) {
329 nfp_err(pf->cpp, "Failed to find ctrl vNIC memory symbol\n");
330 err = PTR_ERR(ctrl_bar);
334 pf->ctrl_vnic = nfp_net_pf_alloc_vnic(pf, false, ctrl_bar, qc_bar,
336 if (IS_ERR(pf->ctrl_vnic)) {
337 err = PTR_ERR(pf->ctrl_vnic);
344 nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
346 mutex_lock(&pf->lock);
347 nfp_app_clean(pf->app);
348 mutex_unlock(&pf->lock);
350 nfp_app_free(pf->app);
355 static void nfp_net_pf_app_clean(struct nfp_pf *pf)
358 nfp_net_pf_free_vnic(pf, pf->ctrl_vnic);
359 nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
362 mutex_lock(&pf->lock);
363 nfp_app_clean(pf->app);
364 mutex_unlock(&pf->lock);
366 nfp_app_free(pf->app);
370 static int nfp_net_pf_app_start_ctrl(struct nfp_pf *pf)
376 err = nfp_net_pf_init_vnic(pf, pf->ctrl_vnic, 0);
380 err = nfp_ctrl_open(pf->ctrl_vnic);
387 nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
391 static void nfp_net_pf_app_stop_ctrl(struct nfp_pf *pf)
395 nfp_ctrl_close(pf->ctrl_vnic);
396 nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
399 static int nfp_net_pf_app_start(struct nfp_pf *pf)
403 err = nfp_net_pf_app_start_ctrl(pf);
407 err = nfp_app_start(pf->app, pf->ctrl_vnic);
412 err = nfp_app_sriov_enable(pf->app, pf->num_vfs);
420 nfp_app_stop(pf->app);
422 nfp_net_pf_app_stop_ctrl(pf);
426 static void nfp_net_pf_app_stop(struct nfp_pf *pf)
429 nfp_app_sriov_disable(pf->app);
430 nfp_app_stop(pf->app);
431 nfp_net_pf_app_stop_ctrl(pf);
434 static void nfp_net_pci_unmap_mem(struct nfp_pf *pf)
436 if (pf->vfcfg_tbl2_area)
437 nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
439 nfp_cpp_area_release_free(pf->vf_cfg_bar);
440 if (pf->mac_stats_bar)
441 nfp_cpp_area_release_free(pf->mac_stats_bar);
442 nfp_cpp_area_release_free(pf->qc_area);
443 nfp_cpp_area_release_free(pf->data_vnic_bar);
446 static int nfp_net_pci_map_mem(struct nfp_pf *pf)
448 u32 min_size, cpp_id;
452 min_size = pf->max_data_vnics * NFP_PF_CSR_SLICE_SIZE;
453 mem = nfp_pf_map_rtsym(pf, "net.bar0", "_pf%d_net_bar0",
454 min_size, &pf->data_vnic_bar);
456 nfp_err(pf->cpp, "Failed to find data vNIC memory symbol\n");
461 min_size = NFP_MAC_STATS_SIZE * (pf->eth_tbl->max_index + 1);
462 pf->mac_stats_mem = nfp_rtsym_map(pf->rtbl, "_mac_stats",
463 "net.macstats", min_size,
465 if (IS_ERR(pf->mac_stats_mem)) {
466 if (PTR_ERR(pf->mac_stats_mem) != -ENOENT) {
467 err = PTR_ERR(pf->mac_stats_mem);
470 pf->mac_stats_mem = NULL;
474 pf->vf_cfg_mem = nfp_pf_map_rtsym(pf, "net.vfcfg", "_pf%d_net_vf_bar",
475 NFP_NET_CFG_BAR_SZ * pf->limit_vfs,
477 if (IS_ERR(pf->vf_cfg_mem)) {
478 if (PTR_ERR(pf->vf_cfg_mem) != -ENOENT) {
479 err = PTR_ERR(pf->vf_cfg_mem);
480 goto err_unmap_mac_stats;
482 pf->vf_cfg_mem = NULL;
485 min_size = NFP_NET_VF_CFG_SZ * pf->limit_vfs + NFP_NET_VF_CFG_MB_SZ;
486 pf->vfcfg_tbl2 = nfp_pf_map_rtsym(pf, "net.vfcfg_tbl2",
488 min_size, &pf->vfcfg_tbl2_area);
489 if (IS_ERR(pf->vfcfg_tbl2)) {
490 if (PTR_ERR(pf->vfcfg_tbl2) != -ENOENT) {
491 err = PTR_ERR(pf->vfcfg_tbl2);
492 goto err_unmap_vf_cfg;
494 pf->vfcfg_tbl2 = NULL;
497 cpp_id = NFP_CPP_ISLAND_ID(0, NFP_CPP_ACTION_RW, 0, 0);
498 mem = nfp_cpp_map_area(pf->cpp, "net.qc", cpp_id, NFP_PCIE_QUEUE(0),
499 NFP_QCP_QUEUE_AREA_SZ, &pf->qc_area);
501 nfp_err(pf->cpp, "Failed to map Queue Controller area.\n");
503 goto err_unmap_vfcfg_tbl2;
508 err_unmap_vfcfg_tbl2:
509 if (pf->vfcfg_tbl2_area)
510 nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
513 nfp_cpp_area_release_free(pf->vf_cfg_bar);
515 if (pf->mac_stats_bar)
516 nfp_cpp_area_release_free(pf->mac_stats_bar);
518 nfp_cpp_area_release_free(pf->data_vnic_bar);
523 nfp_net_eth_port_update(struct nfp_cpp *cpp, struct nfp_port *port,
524 struct nfp_eth_table *eth_table)
526 struct nfp_eth_table_port *eth_port;
530 eth_port = nfp_net_find_port(eth_table, port->eth_id);
532 set_bit(NFP_PORT_CHANGED, &port->flags);
533 nfp_warn(cpp, "Warning: port #%d not present after reconfig\n",
537 if (eth_port->override_changed) {
538 nfp_warn(cpp, "Port #%d config changed, unregistering. Driver reload required before port will be operational again.\n", port->eth_id);
539 port->type = NFP_PORT_INVALID;
542 memcpy(port->eth_port, eth_port, sizeof(*eth_port));
547 int nfp_net_refresh_port_table_sync(struct nfp_pf *pf)
549 struct nfp_eth_table *eth_table;
550 struct nfp_net *nn, *next;
551 struct nfp_port *port;
554 lockdep_assert_held(&pf->lock);
556 /* Check for nfp_net_pci_remove() racing against us */
557 if (list_empty(&pf->vnics))
560 /* Update state of all ports */
562 list_for_each_entry(port, &pf->ports, port_list)
563 clear_bit(NFP_PORT_CHANGED, &port->flags);
565 eth_table = nfp_eth_read_ports(pf->cpp);
567 list_for_each_entry(port, &pf->ports, port_list)
568 if (__nfp_port_get_eth_port(port))
569 set_bit(NFP_PORT_CHANGED, &port->flags);
571 nfp_err(pf->cpp, "Error refreshing port config!\n");
575 list_for_each_entry(port, &pf->ports, port_list)
576 if (__nfp_port_get_eth_port(port))
577 nfp_net_eth_port_update(pf->cpp, port, eth_table);
582 /* Resync repr state. This may cause reprs to be removed. */
583 err = nfp_reprs_resync_phys_ports(pf->app);
587 /* Shoot off the ports which became invalid */
588 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
589 if (!nn->port || nn->port->type != NFP_PORT_INVALID)
592 nfp_net_pf_clean_vnic(pf, nn);
593 nfp_net_pf_free_vnic(pf, nn);
599 static void nfp_net_refresh_vnics(struct work_struct *work)
601 struct nfp_pf *pf = container_of(work, struct nfp_pf,
604 mutex_lock(&pf->lock);
605 nfp_net_refresh_port_table_sync(pf);
606 mutex_unlock(&pf->lock);
609 void nfp_net_refresh_port_table(struct nfp_port *port)
611 struct nfp_pf *pf = port->app->pf;
613 set_bit(NFP_PORT_CHANGED, &port->flags);
615 queue_work(pf->wq, &pf->port_refresh_work);
618 int nfp_net_refresh_eth_port(struct nfp_port *port)
620 struct nfp_cpp *cpp = port->app->cpp;
621 struct nfp_eth_table *eth_table;
624 clear_bit(NFP_PORT_CHANGED, &port->flags);
626 eth_table = nfp_eth_read_ports(cpp);
628 set_bit(NFP_PORT_CHANGED, &port->flags);
629 nfp_err(cpp, "Error refreshing port state table!\n");
633 ret = nfp_net_eth_port_update(cpp, port, eth_table);
641 * PCI device functions
643 int nfp_net_pci_probe(struct nfp_pf *pf)
645 struct devlink *devlink = priv_to_devlink(pf);
646 struct nfp_net_fw_version fw_ver;
647 u8 __iomem *ctrl_bar, *qc_bar;
651 INIT_WORK(&pf->port_refresh_work, nfp_net_refresh_vnics);
654 nfp_err(pf->cpp, "No %s, giving up.\n",
655 pf->fw_loaded ? "symbol table" : "firmware found");
659 pf->max_data_vnics = nfp_net_pf_get_num_ports(pf);
660 if ((int)pf->max_data_vnics < 0)
661 return pf->max_data_vnics;
663 err = nfp_net_pci_map_mem(pf);
667 ctrl_bar = nfp_cpp_area_iomem(pf->data_vnic_bar);
668 qc_bar = nfp_cpp_area_iomem(pf->qc_area);
669 if (!ctrl_bar || !qc_bar) {
674 nfp_net_get_fw_version(&fw_ver, ctrl_bar);
675 if (fw_ver.resv || fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
676 nfp_err(pf->cpp, "Unknown Firmware ABI %d.%d.%d.%d\n",
677 fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor);
682 /* Determine stride */
683 if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
685 nfp_warn(pf->cpp, "OBSOLETE Firmware detected - VF isolation not available\n");
687 switch (fw_ver.major) {
692 nfp_err(pf->cpp, "Unsupported Firmware ABI %d.%d.%d.%d\n",
693 fw_ver.resv, fw_ver.class,
694 fw_ver.major, fw_ver.minor);
700 err = nfp_net_pf_app_init(pf, qc_bar, stride);
704 err = devlink_register(devlink, &pf->pdev->dev);
708 err = nfp_shared_buf_register(pf);
710 goto err_devlink_unreg;
712 err = nfp_devlink_params_register(pf);
714 goto err_shared_buf_unreg;
716 mutex_lock(&pf->lock);
717 pf->ddir = nfp_net_debugfs_device_add(pf->pdev);
719 /* Allocate the vnics and do basic init */
720 err = nfp_net_pf_alloc_vnics(pf, ctrl_bar, qc_bar, stride);
724 err = nfp_net_pf_alloc_irqs(pf);
728 err = nfp_net_pf_app_start(pf);
732 err = nfp_net_pf_init_vnics(pf);
736 mutex_unlock(&pf->lock);
741 nfp_net_pf_app_stop(pf);
743 nfp_net_pf_free_irqs(pf);
745 nfp_net_pf_free_vnics(pf);
747 nfp_net_debugfs_dir_clean(&pf->ddir);
748 mutex_unlock(&pf->lock);
749 nfp_devlink_params_unregister(pf);
750 err_shared_buf_unreg:
751 nfp_shared_buf_unregister(pf);
753 cancel_work_sync(&pf->port_refresh_work);
754 devlink_unregister(devlink);
756 nfp_net_pf_app_clean(pf);
758 nfp_net_pci_unmap_mem(pf);
762 void nfp_net_pci_remove(struct nfp_pf *pf)
764 struct nfp_net *nn, *next;
766 mutex_lock(&pf->lock);
767 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
768 if (!nfp_net_is_data_vnic(nn))
770 nfp_net_pf_clean_vnic(pf, nn);
771 nfp_net_pf_free_vnic(pf, nn);
774 nfp_net_pf_app_stop(pf);
775 /* stop app first, to avoid double free of ctrl vNIC's ddir */
776 nfp_net_debugfs_dir_clean(&pf->ddir);
778 mutex_unlock(&pf->lock);
780 nfp_devlink_params_unregister(pf);
781 nfp_shared_buf_unregister(pf);
782 devlink_unregister(priv_to_devlink(pf));
784 nfp_net_pf_free_irqs(pf);
785 nfp_net_pf_app_clean(pf);
786 nfp_net_pci_unmap_mem(pf);
788 cancel_work_sync(&pf->port_refresh_work);