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)
181 err = nfp_net_init(nn);
185 nfp_net_debugfs_vnic_add(nn, pf->ddir, id);
188 err = nfp_devlink_port_register(pf->app, nn->port);
195 if (nfp_net_is_data_vnic(nn)) {
196 err = nfp_app_vnic_init(pf->app, nn);
198 goto err_devlink_port_clean;
203 err_devlink_port_clean:
205 nfp_devlink_port_unregister(nn->port);
207 nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
213 nfp_net_pf_alloc_vnics(struct nfp_pf *pf, void __iomem *ctrl_bar,
214 void __iomem *qc_bar, int stride)
220 for (i = 0; i < pf->max_data_vnics; i++) {
221 nn = nfp_net_pf_alloc_vnic(pf, true, ctrl_bar, qc_bar,
228 ctrl_bar += NFP_PF_CSR_SLICE_SIZE;
230 /* Kill the vNIC if app init marked it as invalid */
231 if (nn->port && nn->port->type == NFP_PORT_INVALID) {
232 nfp_net_pf_free_vnic(pf, nn);
237 if (list_empty(&pf->vnics))
243 nfp_net_pf_free_vnics(pf);
247 static void nfp_net_pf_clean_vnic(struct nfp_pf *pf, struct nfp_net *nn)
249 if (nfp_net_is_data_vnic(nn))
250 nfp_app_vnic_clean(pf->app, nn);
252 nfp_devlink_port_unregister(nn->port);
253 nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
257 static int nfp_net_pf_alloc_irqs(struct nfp_pf *pf)
259 unsigned int wanted_irqs, num_irqs, vnics_left, irqs_left;
262 /* Get MSI-X vectors */
264 list_for_each_entry(nn, &pf->vnics, vnic_list)
265 wanted_irqs += NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs;
266 pf->irq_entries = kcalloc(wanted_irqs, sizeof(*pf->irq_entries),
268 if (!pf->irq_entries)
271 num_irqs = nfp_net_irqs_alloc(pf->pdev, pf->irq_entries,
272 NFP_NET_MIN_VNIC_IRQS * pf->num_vnics,
275 nfp_warn(pf->cpp, "Unable to allocate MSI-X vectors\n");
276 kfree(pf->irq_entries);
280 /* Distribute IRQs to vNICs */
281 irqs_left = num_irqs;
282 vnics_left = pf->num_vnics;
283 list_for_each_entry(nn, &pf->vnics, vnic_list) {
286 n = min(NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs,
287 DIV_ROUND_UP(irqs_left, vnics_left));
288 nfp_net_irqs_assign(nn, &pf->irq_entries[num_irqs - irqs_left],
297 static void nfp_net_pf_free_irqs(struct nfp_pf *pf)
299 nfp_net_irqs_disable(pf->pdev);
300 kfree(pf->irq_entries);
303 static int nfp_net_pf_init_vnics(struct nfp_pf *pf)
309 /* Finish vNIC init and register */
311 list_for_each_entry(nn, &pf->vnics, vnic_list) {
312 if (!nfp_net_is_data_vnic(nn))
314 err = nfp_net_pf_init_vnic(pf, nn, id);
316 goto err_prev_deinit;
324 list_for_each_entry_continue_reverse(nn, &pf->vnics, vnic_list)
325 if (nfp_net_is_data_vnic(nn))
326 nfp_net_pf_clean_vnic(pf, nn);
331 nfp_net_pf_app_init(struct nfp_pf *pf, u8 __iomem *qc_bar, unsigned int stride)
333 u8 __iomem *ctrl_bar;
336 pf->app = nfp_app_alloc(pf, nfp_net_pf_get_app_id(pf));
338 return PTR_ERR(pf->app);
340 mutex_lock(&pf->lock);
341 err = nfp_app_init(pf->app);
342 mutex_unlock(&pf->lock);
346 if (!nfp_app_needs_ctrl_vnic(pf->app))
349 ctrl_bar = nfp_pf_map_rtsym(pf, "net.ctrl", "_pf%u_net_ctrl_bar",
350 NFP_PF_CSR_SLICE_SIZE, &pf->ctrl_vnic_bar);
351 if (IS_ERR(ctrl_bar)) {
352 nfp_err(pf->cpp, "Failed to find ctrl vNIC memory symbol\n");
353 err = PTR_ERR(ctrl_bar);
357 pf->ctrl_vnic = nfp_net_pf_alloc_vnic(pf, false, ctrl_bar, qc_bar,
359 if (IS_ERR(pf->ctrl_vnic)) {
360 err = PTR_ERR(pf->ctrl_vnic);
367 nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
369 mutex_lock(&pf->lock);
370 nfp_app_clean(pf->app);
371 mutex_unlock(&pf->lock);
373 nfp_app_free(pf->app);
378 static void nfp_net_pf_app_clean(struct nfp_pf *pf)
381 nfp_net_pf_free_vnic(pf, pf->ctrl_vnic);
382 nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
385 mutex_lock(&pf->lock);
386 nfp_app_clean(pf->app);
387 mutex_unlock(&pf->lock);
389 nfp_app_free(pf->app);
393 static int nfp_net_pf_app_start_ctrl(struct nfp_pf *pf)
399 err = nfp_net_pf_init_vnic(pf, pf->ctrl_vnic, 0);
403 err = nfp_ctrl_open(pf->ctrl_vnic);
410 nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
414 static void nfp_net_pf_app_stop_ctrl(struct nfp_pf *pf)
418 nfp_ctrl_close(pf->ctrl_vnic);
419 nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
422 static int nfp_net_pf_app_start(struct nfp_pf *pf)
426 err = nfp_net_pf_app_start_ctrl(pf);
430 err = nfp_app_start(pf->app, pf->ctrl_vnic);
435 err = nfp_app_sriov_enable(pf->app, pf->num_vfs);
443 nfp_app_stop(pf->app);
445 nfp_net_pf_app_stop_ctrl(pf);
449 static void nfp_net_pf_app_stop(struct nfp_pf *pf)
452 nfp_app_sriov_disable(pf->app);
453 nfp_app_stop(pf->app);
454 nfp_net_pf_app_stop_ctrl(pf);
457 static void nfp_net_pci_unmap_mem(struct nfp_pf *pf)
459 if (pf->vfcfg_tbl2_area)
460 nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
462 nfp_cpp_area_release_free(pf->vf_cfg_bar);
463 if (pf->mac_stats_bar)
464 nfp_cpp_area_release_free(pf->mac_stats_bar);
465 nfp_cpp_area_release_free(pf->qc_area);
466 nfp_cpp_area_release_free(pf->data_vnic_bar);
469 static int nfp_net_pci_map_mem(struct nfp_pf *pf)
475 min_size = pf->max_data_vnics * NFP_PF_CSR_SLICE_SIZE;
476 mem = nfp_pf_map_rtsym(pf, "net.bar0", "_pf%d_net_bar0",
477 min_size, &pf->data_vnic_bar);
479 nfp_err(pf->cpp, "Failed to find data vNIC memory symbol\n");
484 min_size = NFP_MAC_STATS_SIZE * (pf->eth_tbl->max_index + 1);
485 pf->mac_stats_mem = nfp_rtsym_map(pf->rtbl, "_mac_stats",
486 "net.macstats", min_size,
488 if (IS_ERR(pf->mac_stats_mem)) {
489 if (PTR_ERR(pf->mac_stats_mem) != -ENOENT) {
490 err = PTR_ERR(pf->mac_stats_mem);
493 pf->mac_stats_mem = NULL;
497 pf->vf_cfg_mem = nfp_pf_map_rtsym(pf, "net.vfcfg", "_pf%d_net_vf_bar",
498 NFP_NET_CFG_BAR_SZ * pf->limit_vfs,
500 if (IS_ERR(pf->vf_cfg_mem)) {
501 if (PTR_ERR(pf->vf_cfg_mem) != -ENOENT) {
502 err = PTR_ERR(pf->vf_cfg_mem);
503 goto err_unmap_mac_stats;
505 pf->vf_cfg_mem = NULL;
508 min_size = NFP_NET_VF_CFG_SZ * pf->limit_vfs + NFP_NET_VF_CFG_MB_SZ;
509 pf->vfcfg_tbl2 = nfp_pf_map_rtsym(pf, "net.vfcfg_tbl2",
511 min_size, &pf->vfcfg_tbl2_area);
512 if (IS_ERR(pf->vfcfg_tbl2)) {
513 if (PTR_ERR(pf->vfcfg_tbl2) != -ENOENT) {
514 err = PTR_ERR(pf->vfcfg_tbl2);
515 goto err_unmap_vf_cfg;
517 pf->vfcfg_tbl2 = NULL;
520 mem = nfp_cpp_map_area(pf->cpp, "net.qc", 0, 0,
521 NFP_PCIE_QUEUE(0), NFP_QCP_QUEUE_AREA_SZ,
524 nfp_err(pf->cpp, "Failed to map Queue Controller area.\n");
526 goto err_unmap_vfcfg_tbl2;
531 err_unmap_vfcfg_tbl2:
532 if (pf->vfcfg_tbl2_area)
533 nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
536 nfp_cpp_area_release_free(pf->vf_cfg_bar);
538 if (pf->mac_stats_bar)
539 nfp_cpp_area_release_free(pf->mac_stats_bar);
541 nfp_cpp_area_release_free(pf->data_vnic_bar);
546 nfp_net_eth_port_update(struct nfp_cpp *cpp, struct nfp_port *port,
547 struct nfp_eth_table *eth_table)
549 struct nfp_eth_table_port *eth_port;
553 eth_port = nfp_net_find_port(eth_table, port->eth_id);
555 set_bit(NFP_PORT_CHANGED, &port->flags);
556 nfp_warn(cpp, "Warning: port #%d not present after reconfig\n",
560 if (eth_port->override_changed) {
561 nfp_warn(cpp, "Port #%d config changed, unregistering. Driver reload required before port will be operational again.\n", port->eth_id);
562 port->type = NFP_PORT_INVALID;
565 memcpy(port->eth_port, eth_port, sizeof(*eth_port));
570 int nfp_net_refresh_port_table_sync(struct nfp_pf *pf)
572 struct nfp_eth_table *eth_table;
573 struct nfp_net *nn, *next;
574 struct nfp_port *port;
577 lockdep_assert_held(&pf->lock);
579 /* Check for nfp_net_pci_remove() racing against us */
580 if (list_empty(&pf->vnics))
583 /* Update state of all ports */
585 list_for_each_entry(port, &pf->ports, port_list)
586 clear_bit(NFP_PORT_CHANGED, &port->flags);
588 eth_table = nfp_eth_read_ports(pf->cpp);
590 list_for_each_entry(port, &pf->ports, port_list)
591 if (__nfp_port_get_eth_port(port))
592 set_bit(NFP_PORT_CHANGED, &port->flags);
594 nfp_err(pf->cpp, "Error refreshing port config!\n");
598 list_for_each_entry(port, &pf->ports, port_list)
599 if (__nfp_port_get_eth_port(port))
600 nfp_net_eth_port_update(pf->cpp, port, eth_table);
605 /* Resync repr state. This may cause reprs to be removed. */
606 err = nfp_reprs_resync_phys_ports(pf->app);
610 /* Shoot off the ports which became invalid */
611 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
612 if (!nn->port || nn->port->type != NFP_PORT_INVALID)
615 nfp_net_pf_clean_vnic(pf, nn);
616 nfp_net_pf_free_vnic(pf, nn);
622 static void nfp_net_refresh_vnics(struct work_struct *work)
624 struct nfp_pf *pf = container_of(work, struct nfp_pf,
627 mutex_lock(&pf->lock);
628 nfp_net_refresh_port_table_sync(pf);
629 mutex_unlock(&pf->lock);
632 void nfp_net_refresh_port_table(struct nfp_port *port)
634 struct nfp_pf *pf = port->app->pf;
636 set_bit(NFP_PORT_CHANGED, &port->flags);
638 queue_work(pf->wq, &pf->port_refresh_work);
641 int nfp_net_refresh_eth_port(struct nfp_port *port)
643 struct nfp_cpp *cpp = port->app->cpp;
644 struct nfp_eth_table *eth_table;
647 clear_bit(NFP_PORT_CHANGED, &port->flags);
649 eth_table = nfp_eth_read_ports(cpp);
651 set_bit(NFP_PORT_CHANGED, &port->flags);
652 nfp_err(cpp, "Error refreshing port state table!\n");
656 ret = nfp_net_eth_port_update(cpp, port, eth_table);
664 * PCI device functions
666 int nfp_net_pci_probe(struct nfp_pf *pf)
668 struct devlink *devlink = priv_to_devlink(pf);
669 struct nfp_net_fw_version fw_ver;
670 u8 __iomem *ctrl_bar, *qc_bar;
674 INIT_WORK(&pf->port_refresh_work, nfp_net_refresh_vnics);
677 nfp_err(pf->cpp, "No %s, giving up.\n",
678 pf->fw_loaded ? "symbol table" : "firmware found");
682 pf->max_data_vnics = nfp_net_pf_get_num_ports(pf);
683 if ((int)pf->max_data_vnics < 0)
684 return pf->max_data_vnics;
686 err = nfp_net_pci_map_mem(pf);
690 ctrl_bar = nfp_cpp_area_iomem(pf->data_vnic_bar);
691 qc_bar = nfp_cpp_area_iomem(pf->qc_area);
692 if (!ctrl_bar || !qc_bar) {
697 nfp_net_get_fw_version(&fw_ver, ctrl_bar);
698 if (fw_ver.resv || fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
699 nfp_err(pf->cpp, "Unknown Firmware ABI %d.%d.%d.%d\n",
700 fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor);
705 /* Determine stride */
706 if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
708 nfp_warn(pf->cpp, "OBSOLETE Firmware detected - VF isolation not available\n");
710 switch (fw_ver.major) {
715 nfp_err(pf->cpp, "Unsupported Firmware ABI %d.%d.%d.%d\n",
716 fw_ver.resv, fw_ver.class,
717 fw_ver.major, fw_ver.minor);
723 err = nfp_net_pf_app_init(pf, qc_bar, stride);
727 err = devlink_register(devlink, &pf->pdev->dev);
731 err = nfp_shared_buf_register(pf);
733 goto err_devlink_unreg;
735 mutex_lock(&pf->lock);
736 pf->ddir = nfp_net_debugfs_device_add(pf->pdev);
738 /* Allocate the vnics and do basic init */
739 err = nfp_net_pf_alloc_vnics(pf, ctrl_bar, qc_bar, stride);
743 err = nfp_net_pf_alloc_irqs(pf);
747 err = nfp_net_pf_app_start(pf);
751 err = nfp_net_pf_init_vnics(pf);
755 mutex_unlock(&pf->lock);
760 nfp_net_pf_app_stop(pf);
762 nfp_net_pf_free_irqs(pf);
764 nfp_net_pf_free_vnics(pf);
766 nfp_net_debugfs_dir_clean(&pf->ddir);
767 mutex_unlock(&pf->lock);
768 nfp_shared_buf_unregister(pf);
770 cancel_work_sync(&pf->port_refresh_work);
771 devlink_unregister(devlink);
773 nfp_net_pf_app_clean(pf);
775 nfp_net_pci_unmap_mem(pf);
779 void nfp_net_pci_remove(struct nfp_pf *pf)
781 struct nfp_net *nn, *next;
783 mutex_lock(&pf->lock);
784 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
785 if (!nfp_net_is_data_vnic(nn))
787 nfp_net_pf_clean_vnic(pf, nn);
788 nfp_net_pf_free_vnic(pf, nn);
791 nfp_net_pf_app_stop(pf);
792 /* stop app first, to avoid double free of ctrl vNIC's ddir */
793 nfp_net_debugfs_dir_clean(&pf->ddir);
795 mutex_unlock(&pf->lock);
797 nfp_shared_buf_unregister(pf);
798 devlink_unregister(priv_to_devlink(pf));
800 nfp_net_pf_free_irqs(pf);
801 nfp_net_pf_app_clean(pf);
802 nfp_net_pci_unmap_mem(pf);
804 cancel_work_sync(&pf->port_refresh_work);