2 * Copyright (C) 2015 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 virtual function network device driver: Main entry point
37 * Author: Jason McMullan <jason.mcmullan@netronome.com>
38 * Rolf Neugebauer <rolf.neugebauer@netronome.com>
41 #include <linux/version.h>
42 #include <linux/module.h>
43 #include <linux/kernel.h>
44 #include <linux/init.h>
45 #include <linux/etherdevice.h>
47 #include "nfp_net_ctrl.h"
50 const char nfp_net_driver_name[] = "nfp_netvf";
51 const char nfp_net_driver_version[] = "0.1";
52 #define PCI_DEVICE_NFP6000VF 0x6003
53 static const struct pci_device_id nfp_netvf_pci_device_ids[] = {
54 { PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_NFP6000VF,
55 PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID,
58 { 0, } /* Required last entry. */
60 MODULE_DEVICE_TABLE(pci, nfp_netvf_pci_device_ids);
62 static void nfp_netvf_get_mac_addr(struct nfp_net *nn)
64 u8 mac_addr[ETH_ALEN];
66 put_unaligned_be32(nn_readl(nn, NFP_NET_CFG_MACADDR + 0), &mac_addr[0]);
67 /* We can't do readw for NFP-3200 compatibility */
68 put_unaligned_be16(nn_readl(nn, NFP_NET_CFG_MACADDR + 4) >> 16,
71 if (!is_valid_ether_addr(mac_addr)) {
72 eth_hw_addr_random(nn->netdev);
76 ether_addr_copy(nn->netdev->dev_addr, mac_addr);
77 ether_addr_copy(nn->netdev->perm_addr, mac_addr);
80 static int nfp_netvf_pci_probe(struct pci_dev *pdev,
81 const struct pci_device_id *pci_id)
83 struct nfp_net_fw_version fw_ver;
84 int max_tx_rings, max_rx_rings;
85 u32 tx_bar_off, rx_bar_off;
86 u32 tx_bar_sz, rx_bar_sz;
87 int tx_bar_no, rx_bar_no;
95 err = pci_enable_device_mem(pdev);
99 err = pci_request_regions(pdev, nfp_net_driver_name);
101 dev_err(&pdev->dev, "Unable to allocate device memory.\n");
102 goto err_pci_disable;
105 switch (pdev->device) {
106 case PCI_DEVICE_NFP6000VF:
111 goto err_pci_regions;
114 pci_set_master(pdev);
116 err = dma_set_mask_and_coherent(&pdev->dev,
117 DMA_BIT_MASK(NFP_NET_MAX_DMA_BITS));
119 goto err_pci_regions;
121 /* Map the Control BAR.
123 * Irrespective of the advertised BAR size we only map the
124 * first NFP_NET_CFG_BAR_SZ of the BAR. This keeps the code
125 * the identical for PF and VF drivers.
127 ctrl_bar = ioremap_nocache(pci_resource_start(pdev, NFP_NET_CTRL_BAR),
131 "Failed to map resource %d\n", NFP_NET_CTRL_BAR);
133 goto err_pci_regions;
136 nfp_net_get_fw_version(&fw_ver, ctrl_bar);
137 if (fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
138 dev_err(&pdev->dev, "Unknown Firmware ABI %d.%d.%d.%d\n",
139 fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor);
144 /* Determine stride */
145 if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 0) ||
146 nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1) ||
147 nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0x12, 0x48)) {
149 tx_bar_no = NFP_NET_Q0_BAR;
150 rx_bar_no = NFP_NET_Q1_BAR;
151 dev_warn(&pdev->dev, "OBSOLETE Firmware detected - VF isolation not available\n");
153 switch (fw_ver.major) {
157 tx_bar_no = NFP_NET_Q0_BAR;
158 rx_bar_no = NFP_NET_Q1_BAR;
161 tx_bar_no = NFP_NET_Q0_BAR;
162 rx_bar_no = tx_bar_no;
166 dev_err(&pdev->dev, "Unsupported Firmware ABI %d.%d.%d.%d\n",
167 fw_ver.resv, fw_ver.class,
168 fw_ver.major, fw_ver.minor);
174 /* Find out how many rings are supported */
175 max_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS);
176 max_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS);
178 tx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_tx_rings * stride;
179 rx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_rx_rings * stride;
182 if (tx_bar_sz > pci_resource_len(pdev, tx_bar_no)) {
184 "TX BAR too small for number of TX rings. Adjusting\n");
185 tx_bar_sz = pci_resource_len(pdev, tx_bar_no);
186 max_tx_rings = (tx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2;
188 if (rx_bar_sz > pci_resource_len(pdev, rx_bar_no)) {
190 "RX BAR too small for number of RX rings. Adjusting\n");
191 rx_bar_sz = pci_resource_len(pdev, rx_bar_no);
192 max_rx_rings = (rx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2;
195 /* XXX Implement a workaround for THB-350 here. Ideally, we
196 * have a different PCI ID for A rev VFs.
198 switch (pdev->device) {
199 case PCI_DEVICE_NFP6000VF:
200 startq = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
201 tx_bar_off = NFP_PCIE_QUEUE(startq);
202 startq = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
203 rx_bar_off = NFP_PCIE_QUEUE(startq);
210 /* Allocate and initialise the netdev */
211 nn = nfp_net_netdev_alloc(pdev, max_tx_rings, max_rx_rings);
218 nn->ctrl_bar = ctrl_bar;
220 nn->is_nfp3200 = is_nfp3200;
221 nn->stride_tx = stride;
222 nn->stride_rx = stride;
224 if (rx_bar_no == tx_bar_no) {
226 resource_size_t map_addr;
228 /* Make a single overlapping BAR mapping */
229 if (tx_bar_off < rx_bar_off)
230 bar_off = tx_bar_off;
232 bar_off = rx_bar_off;
234 if ((tx_bar_off + tx_bar_sz) > (rx_bar_off + rx_bar_sz))
235 bar_sz = (tx_bar_off + tx_bar_sz) - bar_off;
237 bar_sz = (rx_bar_off + rx_bar_sz) - bar_off;
239 map_addr = pci_resource_start(pdev, tx_bar_no) + bar_off;
240 nn->q_bar = ioremap_nocache(map_addr, bar_sz);
242 nn_err(nn, "Failed to map resource %d\n", tx_bar_no);
244 goto err_netdev_free;
248 nn->tx_bar = nn->q_bar + (tx_bar_off - bar_off);
250 nn->rx_bar = nn->q_bar + (rx_bar_off - bar_off);
252 resource_size_t map_addr;
255 map_addr = pci_resource_start(pdev, tx_bar_no) + tx_bar_off;
256 nn->tx_bar = ioremap_nocache(map_addr, tx_bar_sz);
258 nn_err(nn, "Failed to map resource %d\n", tx_bar_no);
260 goto err_netdev_free;
264 map_addr = pci_resource_start(pdev, rx_bar_no) + rx_bar_off;
265 nn->rx_bar = ioremap_nocache(map_addr, rx_bar_sz);
267 nn_err(nn, "Failed to map resource %d\n", rx_bar_no);
273 nfp_netvf_get_mac_addr(nn);
275 err = nfp_net_irqs_alloc(nn);
277 nn_warn(nn, "Unable to allocate MSI-X Vectors. Exiting\n");
282 /* Get ME clock frequency from ctrl BAR
283 * XXX for now frequency is hardcoded until we figure out how
284 * to get the value from nfp-hwinfo into ctrl bar
286 nn->me_freq_mhz = 1200;
288 err = nfp_net_netdev_init(nn->netdev);
290 goto err_irqs_disable;
292 pci_set_drvdata(pdev, nn);
295 nfp_net_debugfs_adapter_add(nn);
300 nfp_net_irqs_disable(nn);
310 pci_set_drvdata(pdev, NULL);
311 nfp_net_netdev_free(nn);
315 pci_release_regions(pdev);
317 pci_disable_device(pdev);
321 static void nfp_netvf_pci_remove(struct pci_dev *pdev)
323 struct nfp_net *nn = pci_get_drvdata(pdev);
325 /* Note, the order is slightly different from above as we need
326 * to keep the nn pointer around till we have freed everything.
328 nfp_net_debugfs_adapter_del(nn);
330 nfp_net_netdev_clean(nn->netdev);
332 nfp_net_irqs_disable(nn);
340 iounmap(nn->ctrl_bar);
342 pci_set_drvdata(pdev, NULL);
344 nfp_net_netdev_free(nn);
346 pci_release_regions(pdev);
347 pci_disable_device(pdev);
350 static struct pci_driver nfp_netvf_pci_driver = {
351 .name = nfp_net_driver_name,
352 .id_table = nfp_netvf_pci_device_ids,
353 .probe = nfp_netvf_pci_probe,
354 .remove = nfp_netvf_pci_remove,
357 static int __init nfp_netvf_init(void)
361 pr_info("%s: NFP VF Network driver, Copyright (C) 2014-2015 Netronome Systems\n",
362 nfp_net_driver_name);
364 nfp_net_debugfs_create();
365 err = pci_register_driver(&nfp_netvf_pci_driver);
367 nfp_net_debugfs_destroy();
374 static void __exit nfp_netvf_exit(void)
376 pci_unregister_driver(&nfp_netvf_pci_driver);
377 nfp_net_debugfs_destroy();
380 module_init(nfp_netvf_init);
381 module_exit(nfp_netvf_exit);
383 MODULE_AUTHOR("Netronome Systems <oss-drivers@netronome.com>");
384 MODULE_LICENSE("GPL");
385 MODULE_DESCRIPTION("NFP VF network device driver");