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 * @port: NFP port structure
72 * First try to get the MAC address from NSP ETH table. If that
73 * fails generate a random address.
75 void nfp_net_get_mac_addr(struct nfp_pf *pf, struct nfp_port *port)
77 struct nfp_eth_table_port *eth_port;
79 eth_port = __nfp_port_get_eth_port(port);
81 eth_hw_addr_random(port->netdev);
85 ether_addr_copy(port->netdev->dev_addr, eth_port->mac_addr);
86 ether_addr_copy(port->netdev->perm_addr, eth_port->mac_addr);
89 static struct nfp_eth_table_port *
90 nfp_net_find_port(struct nfp_eth_table *eth_tbl, unsigned int index)
94 for (i = 0; eth_tbl && i < eth_tbl->count; i++)
95 if (eth_tbl->ports[i].index == index)
96 return ð_tbl->ports[i];
102 nfp_net_pf_rtsym_read_optional(struct nfp_pf *pf, const char *format,
103 unsigned int default_val)
109 snprintf(name, sizeof(name), format, nfp_cppcore_pcie_unit(pf->cpp));
111 val = nfp_rtsym_read_le(pf->rtbl, name, &err);
115 nfp_err(pf->cpp, "Unable to read symbol %s\n", name);
122 static int nfp_net_pf_get_num_ports(struct nfp_pf *pf)
124 return nfp_net_pf_rtsym_read_optional(pf, "nfd_cfg_pf%u_num_ports", 1);
127 static int nfp_net_pf_get_app_id(struct nfp_pf *pf)
129 return nfp_net_pf_rtsym_read_optional(pf, "_pf%u_net_app_id",
134 nfp_net_pf_map_rtsym(struct nfp_pf *pf, const char *name, const char *sym_fmt,
135 unsigned int min_size, struct nfp_cpp_area **area)
139 snprintf(pf_symbol, sizeof(pf_symbol), sym_fmt,
140 nfp_cppcore_pcie_unit(pf->cpp));
142 return nfp_rtsym_map(pf->rtbl, pf_symbol, name, min_size, area);
145 static void nfp_net_pf_free_vnic(struct nfp_pf *pf, struct nfp_net *nn)
147 if (nfp_net_is_data_vnic(nn))
148 nfp_app_vnic_free(pf->app, nn);
149 nfp_port_free(nn->port);
150 list_del(&nn->vnic_list);
155 static void nfp_net_pf_free_vnics(struct nfp_pf *pf)
157 struct nfp_net *nn, *next;
159 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list)
160 if (nfp_net_is_data_vnic(nn))
161 nfp_net_pf_free_vnic(pf, nn);
164 static struct nfp_net *
165 nfp_net_pf_alloc_vnic(struct nfp_pf *pf, bool needs_netdev,
166 void __iomem *ctrl_bar, void __iomem *qc_bar,
167 int stride, unsigned int id)
169 u32 tx_base, rx_base, n_tx_rings, n_rx_rings;
173 tx_base = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
174 rx_base = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
175 n_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS);
176 n_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS);
178 /* Allocate and initialise the vNIC */
179 nn = nfp_net_alloc(pf->pdev, needs_netdev, n_tx_rings, n_rx_rings);
184 nfp_net_get_fw_version(&nn->fw_ver, ctrl_bar);
185 nn->dp.ctrl_bar = ctrl_bar;
186 nn->tx_bar = qc_bar + tx_base * NFP_QCP_QUEUE_ADDR_SZ;
187 nn->rx_bar = qc_bar + rx_base * NFP_QCP_QUEUE_ADDR_SZ;
189 nn->stride_rx = stride;
190 nn->stride_tx = stride;
193 err = nfp_app_vnic_alloc(pf->app, nn, id);
201 list_add_tail(&nn->vnic_list, &pf->vnics);
207 nfp_net_pf_init_vnic(struct nfp_pf *pf, struct nfp_net *nn, unsigned int id)
211 /* Get ME clock frequency from ctrl BAR
212 * XXX for now frequency is hardcoded until we figure out how
213 * to get the value from nfp-hwinfo into ctrl bar
215 nn->me_freq_mhz = 1200;
217 err = nfp_net_init(nn);
221 nfp_net_debugfs_vnic_add(nn, pf->ddir, id);
224 err = nfp_devlink_port_register(pf->app, nn->port);
231 if (nfp_net_is_data_vnic(nn)) {
232 err = nfp_app_vnic_init(pf->app, nn);
234 goto err_devlink_port_clean;
239 err_devlink_port_clean:
241 nfp_devlink_port_unregister(nn->port);
243 nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
249 nfp_net_pf_alloc_vnics(struct nfp_pf *pf, void __iomem *ctrl_bar,
250 void __iomem *qc_bar, int stride)
256 for (i = 0; i < pf->max_data_vnics; i++) {
257 nn = nfp_net_pf_alloc_vnic(pf, true, ctrl_bar, qc_bar,
264 ctrl_bar += NFP_PF_CSR_SLICE_SIZE;
266 /* Kill the vNIC if app init marked it as invalid */
267 if (nn->port && nn->port->type == NFP_PORT_INVALID) {
268 nfp_net_pf_free_vnic(pf, nn);
273 if (list_empty(&pf->vnics))
279 nfp_net_pf_free_vnics(pf);
283 static void nfp_net_pf_clean_vnic(struct nfp_pf *pf, struct nfp_net *nn)
285 if (nfp_net_is_data_vnic(nn))
286 nfp_app_vnic_clean(pf->app, nn);
288 nfp_devlink_port_unregister(nn->port);
289 nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
293 static int nfp_net_pf_alloc_irqs(struct nfp_pf *pf)
295 unsigned int wanted_irqs, num_irqs, vnics_left, irqs_left;
298 /* Get MSI-X vectors */
300 list_for_each_entry(nn, &pf->vnics, vnic_list)
301 wanted_irqs += NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs;
302 pf->irq_entries = kcalloc(wanted_irqs, sizeof(*pf->irq_entries),
304 if (!pf->irq_entries)
307 num_irqs = nfp_net_irqs_alloc(pf->pdev, pf->irq_entries,
308 NFP_NET_MIN_VNIC_IRQS * pf->num_vnics,
311 nfp_warn(pf->cpp, "Unable to allocate MSI-X vectors\n");
312 kfree(pf->irq_entries);
316 /* Distribute IRQs to vNICs */
317 irqs_left = num_irqs;
318 vnics_left = pf->num_vnics;
319 list_for_each_entry(nn, &pf->vnics, vnic_list) {
322 n = min(NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs,
323 DIV_ROUND_UP(irqs_left, vnics_left));
324 nfp_net_irqs_assign(nn, &pf->irq_entries[num_irqs - irqs_left],
333 static void nfp_net_pf_free_irqs(struct nfp_pf *pf)
335 nfp_net_irqs_disable(pf->pdev);
336 kfree(pf->irq_entries);
339 static int nfp_net_pf_init_vnics(struct nfp_pf *pf)
345 /* Finish vNIC init and register */
347 list_for_each_entry(nn, &pf->vnics, vnic_list) {
348 if (!nfp_net_is_data_vnic(nn))
350 err = nfp_net_pf_init_vnic(pf, nn, id);
352 goto err_prev_deinit;
360 list_for_each_entry_continue_reverse(nn, &pf->vnics, vnic_list)
361 if (nfp_net_is_data_vnic(nn))
362 nfp_net_pf_clean_vnic(pf, nn);
367 nfp_net_pf_app_init(struct nfp_pf *pf, u8 __iomem *qc_bar, unsigned int stride)
369 u8 __iomem *ctrl_bar;
372 pf->app = nfp_app_alloc(pf, nfp_net_pf_get_app_id(pf));
374 return PTR_ERR(pf->app);
376 err = nfp_app_init(pf->app);
380 if (!nfp_app_needs_ctrl_vnic(pf->app))
383 ctrl_bar = nfp_net_pf_map_rtsym(pf, "net.ctrl", "_pf%u_net_ctrl_bar",
384 NFP_PF_CSR_SLICE_SIZE,
386 if (IS_ERR(ctrl_bar)) {
387 nfp_err(pf->cpp, "Failed to find ctrl vNIC memory symbol\n");
388 err = PTR_ERR(ctrl_bar);
392 pf->ctrl_vnic = nfp_net_pf_alloc_vnic(pf, false, ctrl_bar, qc_bar,
394 if (IS_ERR(pf->ctrl_vnic)) {
395 err = PTR_ERR(pf->ctrl_vnic);
402 nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
404 nfp_app_clean(pf->app);
406 nfp_app_free(pf->app);
411 static void nfp_net_pf_app_clean(struct nfp_pf *pf)
414 nfp_net_pf_free_vnic(pf, pf->ctrl_vnic);
415 nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
417 nfp_app_clean(pf->app);
418 nfp_app_free(pf->app);
422 static int nfp_net_pf_app_start_ctrl(struct nfp_pf *pf)
428 err = nfp_net_pf_init_vnic(pf, pf->ctrl_vnic, 0);
432 err = nfp_ctrl_open(pf->ctrl_vnic);
439 nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
443 static void nfp_net_pf_app_stop_ctrl(struct nfp_pf *pf)
447 nfp_ctrl_close(pf->ctrl_vnic);
448 nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
451 static int nfp_net_pf_app_start(struct nfp_pf *pf)
455 err = nfp_net_pf_app_start_ctrl(pf);
459 err = nfp_app_start(pf->app, pf->ctrl_vnic);
464 err = nfp_app_sriov_enable(pf->app, pf->num_vfs);
472 nfp_app_stop(pf->app);
474 nfp_net_pf_app_stop_ctrl(pf);
478 static void nfp_net_pf_app_stop(struct nfp_pf *pf)
481 nfp_app_sriov_disable(pf->app);
482 nfp_app_stop(pf->app);
483 nfp_net_pf_app_stop_ctrl(pf);
486 static void nfp_net_pci_unmap_mem(struct nfp_pf *pf)
488 if (pf->vfcfg_tbl2_area)
489 nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
491 nfp_cpp_area_release_free(pf->vf_cfg_bar);
492 if (pf->mac_stats_bar)
493 nfp_cpp_area_release_free(pf->mac_stats_bar);
494 nfp_cpp_area_release_free(pf->qc_area);
495 nfp_cpp_area_release_free(pf->data_vnic_bar);
498 static int nfp_net_pci_map_mem(struct nfp_pf *pf)
504 min_size = pf->max_data_vnics * NFP_PF_CSR_SLICE_SIZE;
505 mem = nfp_net_pf_map_rtsym(pf, "net.bar0", "_pf%d_net_bar0",
506 min_size, &pf->data_vnic_bar);
508 nfp_err(pf->cpp, "Failed to find data vNIC memory symbol\n");
512 min_size = NFP_MAC_STATS_SIZE * (pf->eth_tbl->max_index + 1);
513 pf->mac_stats_mem = nfp_rtsym_map(pf->rtbl, "_mac_stats",
514 "net.macstats", min_size,
516 if (IS_ERR(pf->mac_stats_mem)) {
517 if (PTR_ERR(pf->mac_stats_mem) != -ENOENT) {
518 err = PTR_ERR(pf->mac_stats_mem);
521 pf->mac_stats_mem = NULL;
524 pf->vf_cfg_mem = nfp_net_pf_map_rtsym(pf, "net.vfcfg",
527 pf->limit_vfs, &pf->vf_cfg_bar);
528 if (IS_ERR(pf->vf_cfg_mem)) {
529 if (PTR_ERR(pf->vf_cfg_mem) != -ENOENT) {
530 err = PTR_ERR(pf->vf_cfg_mem);
531 goto err_unmap_mac_stats;
533 pf->vf_cfg_mem = NULL;
536 min_size = NFP_NET_VF_CFG_SZ * pf->limit_vfs + NFP_NET_VF_CFG_MB_SZ;
537 pf->vfcfg_tbl2 = nfp_net_pf_map_rtsym(pf, "net.vfcfg_tbl2",
539 min_size, &pf->vfcfg_tbl2_area);
540 if (IS_ERR(pf->vfcfg_tbl2)) {
541 if (PTR_ERR(pf->vfcfg_tbl2) != -ENOENT) {
542 err = PTR_ERR(pf->vfcfg_tbl2);
543 goto err_unmap_vf_cfg;
545 pf->vfcfg_tbl2 = NULL;
548 mem = nfp_cpp_map_area(pf->cpp, "net.qc", 0, 0,
549 NFP_PCIE_QUEUE(0), NFP_QCP_QUEUE_AREA_SZ,
552 nfp_err(pf->cpp, "Failed to map Queue Controller area.\n");
554 goto err_unmap_vfcfg_tbl2;
559 err_unmap_vfcfg_tbl2:
560 if (pf->vfcfg_tbl2_area)
561 nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
564 nfp_cpp_area_release_free(pf->vf_cfg_bar);
566 if (pf->mac_stats_bar)
567 nfp_cpp_area_release_free(pf->mac_stats_bar);
569 nfp_cpp_area_release_free(pf->data_vnic_bar);
573 static void nfp_net_pci_remove_finish(struct nfp_pf *pf)
575 nfp_net_pf_app_stop(pf);
576 /* stop app first, to avoid double free of ctrl vNIC's ddir */
577 nfp_net_debugfs_dir_clean(&pf->ddir);
579 nfp_net_pf_free_irqs(pf);
580 nfp_net_pf_app_clean(pf);
581 nfp_net_pci_unmap_mem(pf);
585 nfp_net_eth_port_update(struct nfp_cpp *cpp, struct nfp_port *port,
586 struct nfp_eth_table *eth_table)
588 struct nfp_eth_table_port *eth_port;
592 eth_port = nfp_net_find_port(eth_table, port->eth_id);
594 set_bit(NFP_PORT_CHANGED, &port->flags);
595 nfp_warn(cpp, "Warning: port #%d not present after reconfig\n",
599 if (eth_port->override_changed) {
600 nfp_warn(cpp, "Port #%d config changed, unregistering. Reboot required before port will be operational again.\n", port->eth_id);
601 port->type = NFP_PORT_INVALID;
604 memcpy(port->eth_port, eth_port, sizeof(*eth_port));
609 int nfp_net_refresh_port_table_sync(struct nfp_pf *pf)
611 struct nfp_eth_table *eth_table;
612 struct nfp_net *nn, *next;
613 struct nfp_port *port;
615 lockdep_assert_held(&pf->lock);
617 /* Check for nfp_net_pci_remove() racing against us */
618 if (list_empty(&pf->vnics))
621 /* Update state of all ports */
623 list_for_each_entry(port, &pf->ports, port_list)
624 clear_bit(NFP_PORT_CHANGED, &port->flags);
626 eth_table = nfp_eth_read_ports(pf->cpp);
628 list_for_each_entry(port, &pf->ports, port_list)
629 if (__nfp_port_get_eth_port(port))
630 set_bit(NFP_PORT_CHANGED, &port->flags);
632 nfp_err(pf->cpp, "Error refreshing port config!\n");
636 list_for_each_entry(port, &pf->ports, port_list)
637 if (__nfp_port_get_eth_port(port))
638 nfp_net_eth_port_update(pf->cpp, port, eth_table);
643 /* Shoot off the ports which became invalid */
644 list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
645 if (!nn->port || nn->port->type != NFP_PORT_INVALID)
648 nfp_net_pf_clean_vnic(pf, nn);
649 nfp_net_pf_free_vnic(pf, nn);
652 if (list_empty(&pf->vnics))
653 nfp_net_pci_remove_finish(pf);
658 static void nfp_net_refresh_vnics(struct work_struct *work)
660 struct nfp_pf *pf = container_of(work, struct nfp_pf,
663 mutex_lock(&pf->lock);
664 nfp_net_refresh_port_table_sync(pf);
665 mutex_unlock(&pf->lock);
668 void nfp_net_refresh_port_table(struct nfp_port *port)
670 struct nfp_pf *pf = port->app->pf;
672 set_bit(NFP_PORT_CHANGED, &port->flags);
674 queue_work(pf->wq, &pf->port_refresh_work);
677 int nfp_net_refresh_eth_port(struct nfp_port *port)
679 struct nfp_cpp *cpp = port->app->cpp;
680 struct nfp_eth_table *eth_table;
683 clear_bit(NFP_PORT_CHANGED, &port->flags);
685 eth_table = nfp_eth_read_ports(cpp);
687 set_bit(NFP_PORT_CHANGED, &port->flags);
688 nfp_err(cpp, "Error refreshing port state table!\n");
692 ret = nfp_net_eth_port_update(cpp, port, eth_table);
700 * PCI device functions
702 int nfp_net_pci_probe(struct nfp_pf *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 mutex_lock(&pf->lock);
718 pf->max_data_vnics = nfp_net_pf_get_num_ports(pf);
719 if ((int)pf->max_data_vnics < 0) {
720 err = pf->max_data_vnics;
724 err = nfp_net_pci_map_mem(pf);
728 ctrl_bar = nfp_cpp_area_iomem(pf->data_vnic_bar);
729 qc_bar = nfp_cpp_area_iomem(pf->qc_area);
730 if (!ctrl_bar || !qc_bar) {
735 nfp_net_get_fw_version(&fw_ver, ctrl_bar);
736 if (fw_ver.resv || fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
737 nfp_err(pf->cpp, "Unknown Firmware ABI %d.%d.%d.%d\n",
738 fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor);
743 /* Determine stride */
744 if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
746 nfp_warn(pf->cpp, "OBSOLETE Firmware detected - VF isolation not available\n");
748 switch (fw_ver.major) {
753 nfp_err(pf->cpp, "Unsupported Firmware ABI %d.%d.%d.%d\n",
754 fw_ver.resv, fw_ver.class,
755 fw_ver.major, fw_ver.minor);
761 err = nfp_net_pf_app_init(pf, qc_bar, stride);
765 pf->ddir = nfp_net_debugfs_device_add(pf->pdev);
767 /* Allocate the vnics and do basic init */
768 err = nfp_net_pf_alloc_vnics(pf, ctrl_bar, qc_bar, stride);
772 err = nfp_net_pf_alloc_irqs(pf);
776 err = nfp_net_pf_app_start(pf);
780 err = nfp_net_pf_init_vnics(pf);
784 mutex_unlock(&pf->lock);
789 nfp_net_pf_app_stop(pf);
791 nfp_net_pf_free_irqs(pf);
793 nfp_net_pf_free_vnics(pf);
795 nfp_net_debugfs_dir_clean(&pf->ddir);
796 nfp_net_pf_app_clean(pf);
798 nfp_net_pci_unmap_mem(pf);
800 mutex_unlock(&pf->lock);
801 cancel_work_sync(&pf->port_refresh_work);
805 void nfp_net_pci_remove(struct nfp_pf *pf)
809 mutex_lock(&pf->lock);
810 if (list_empty(&pf->vnics))
813 list_for_each_entry(nn, &pf->vnics, vnic_list)
814 if (nfp_net_is_data_vnic(nn))
815 nfp_net_pf_clean_vnic(pf, nn);
817 nfp_net_pf_free_vnics(pf);
819 nfp_net_pci_remove_finish(pf);
821 mutex_unlock(&pf->lock);
823 cancel_work_sync(&pf->port_refresh_work);