1 /*
2 * Copyright (C) 2015-2017 Netronome Systems, Inc.
3 *
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.
8 *
9 * The BSD 2-Clause License:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * 1. Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
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.
23 *
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
31 * SOFTWARE.
32 */
33
34 /*
35 * nfp_netvf_main.c
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>
39 */
40
41 #include <linux/module.h>
42 #include <linux/kernel.h>
43 #include <linux/init.h>
44 #include <linux/etherdevice.h>
45
46 #include "nfp_net_ctrl.h"
47 #include "nfp_net.h"
48 #include "nfp_main.h"
49
50 /**
51 * struct nfp_net_vf - NFP VF-specific device structure
52 * @nn: NFP Net structure for this device
53 * @irq_entries: Pre-allocated array of MSI-X entries
54 * @q_bar: Pointer to mapped QC memory (NULL if TX/RX mapped directly)
55 * @ddir: Per-device debugfs directory
56 */
57 struct nfp_net_vf {
58 struct nfp_net *nn;
59
60 struct msix_entry irq_entries[NFP_NET_NON_Q_VECTORS +
61 NFP_NET_MAX_TX_RINGS];
62 u8 __iomem *q_bar;
63
64 struct dentry *ddir;
65 };
66
67 static const char nfp_net_driver_name[] = "nfp_netvf";
68
69 #define PCI_DEVICE_NFP6000VF 0x6003
70 static const struct pci_device_id nfp_netvf_pci_device_ids[] = {
71 { PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_NFP6000VF,
72 PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID,
73 PCI_ANY_ID, 0,
74 },
75 { 0, } /* Required last entry. */
76 };
77 MODULE_DEVICE_TABLE(pci, nfp_netvf_pci_device_ids);
78
nfp_netvf_get_mac_addr(struct nfp_net * nn)79 static void nfp_netvf_get_mac_addr(struct nfp_net *nn)
80 {
81 u8 mac_addr[ETH_ALEN];
82
83 put_unaligned_be32(nn_readl(nn, NFP_NET_CFG_MACADDR + 0), &mac_addr[0]);
84 put_unaligned_be16(nn_readw(nn, NFP_NET_CFG_MACADDR + 6), &mac_addr[4]);
85
86 if (!is_valid_ether_addr(mac_addr)) {
87 eth_hw_addr_random(nn->dp.netdev);
88 return;
89 }
90
91 ether_addr_copy(nn->dp.netdev->dev_addr, mac_addr);
92 ether_addr_copy(nn->dp.netdev->perm_addr, mac_addr);
93 }
94
nfp_netvf_pci_probe(struct pci_dev * pdev,const struct pci_device_id * pci_id)95 static int nfp_netvf_pci_probe(struct pci_dev *pdev,
96 const struct pci_device_id *pci_id)
97 {
98 struct nfp_net_fw_version fw_ver;
99 int max_tx_rings, max_rx_rings;
100 u32 tx_bar_off, rx_bar_off;
101 u32 tx_bar_sz, rx_bar_sz;
102 int tx_bar_no, rx_bar_no;
103 struct nfp_net_vf *vf;
104 unsigned int num_irqs;
105 u8 __iomem *ctrl_bar;
106 struct nfp_net *nn;
107 u32 startq;
108 int stride;
109 int err;
110
111 vf = kzalloc(sizeof(*vf), GFP_KERNEL);
112 if (!vf)
113 return -ENOMEM;
114 pci_set_drvdata(pdev, vf);
115
116 err = pci_enable_device_mem(pdev);
117 if (err)
118 goto err_free_vf;
119
120 err = pci_request_regions(pdev, nfp_net_driver_name);
121 if (err) {
122 dev_err(&pdev->dev, "Unable to allocate device memory.\n");
123 goto err_pci_disable;
124 }
125
126 pci_set_master(pdev);
127
128 err = dma_set_mask_and_coherent(&pdev->dev,
129 DMA_BIT_MASK(NFP_NET_MAX_DMA_BITS));
130 if (err)
131 goto err_pci_regions;
132
133 /* Map the Control BAR.
134 *
135 * Irrespective of the advertised BAR size we only map the
136 * first NFP_NET_CFG_BAR_SZ of the BAR. This keeps the code
137 * the identical for PF and VF drivers.
138 */
139 ctrl_bar = ioremap_nocache(pci_resource_start(pdev, NFP_NET_CTRL_BAR),
140 NFP_NET_CFG_BAR_SZ);
141 if (!ctrl_bar) {
142 dev_err(&pdev->dev,
143 "Failed to map resource %d\n", NFP_NET_CTRL_BAR);
144 err = -EIO;
145 goto err_pci_regions;
146 }
147
148 nfp_net_get_fw_version(&fw_ver, ctrl_bar);
149 if (fw_ver.resv || fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
150 dev_err(&pdev->dev, "Unknown Firmware ABI %d.%d.%d.%d\n",
151 fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor);
152 err = -EINVAL;
153 goto err_ctrl_unmap;
154 }
155
156 /* Determine stride */
157 if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
158 stride = 2;
159 tx_bar_no = NFP_NET_Q0_BAR;
160 rx_bar_no = NFP_NET_Q1_BAR;
161 dev_warn(&pdev->dev, "OBSOLETE Firmware detected - VF isolation not available\n");
162 } else {
163 switch (fw_ver.major) {
164 case 1 ... 5:
165 stride = 4;
166 tx_bar_no = NFP_NET_Q0_BAR;
167 rx_bar_no = tx_bar_no;
168 break;
169 default:
170 dev_err(&pdev->dev, "Unsupported Firmware ABI %d.%d.%d.%d\n",
171 fw_ver.resv, fw_ver.class,
172 fw_ver.major, fw_ver.minor);
173 err = -EINVAL;
174 goto err_ctrl_unmap;
175 }
176 }
177
178 /* Find out how many rings are supported */
179 max_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS);
180 max_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS);
181
182 tx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_tx_rings * stride;
183 rx_bar_sz = NFP_QCP_QUEUE_ADDR_SZ * max_rx_rings * stride;
184
185 /* Sanity checks */
186 if (tx_bar_sz > pci_resource_len(pdev, tx_bar_no)) {
187 dev_err(&pdev->dev,
188 "TX BAR too small for number of TX rings. Adjusting\n");
189 tx_bar_sz = pci_resource_len(pdev, tx_bar_no);
190 max_tx_rings = (tx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2;
191 }
192 if (rx_bar_sz > pci_resource_len(pdev, rx_bar_no)) {
193 dev_err(&pdev->dev,
194 "RX BAR too small for number of RX rings. Adjusting\n");
195 rx_bar_sz = pci_resource_len(pdev, rx_bar_no);
196 max_rx_rings = (rx_bar_sz / NFP_QCP_QUEUE_ADDR_SZ) / 2;
197 }
198
199 startq = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
200 tx_bar_off = NFP_PCIE_QUEUE(startq);
201 startq = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
202 rx_bar_off = NFP_PCIE_QUEUE(startq);
203
204 /* Allocate and initialise the netdev */
205 nn = nfp_net_alloc(pdev, true, max_tx_rings, max_rx_rings);
206 if (IS_ERR(nn)) {
207 err = PTR_ERR(nn);
208 goto err_ctrl_unmap;
209 }
210 vf->nn = nn;
211
212 nn->fw_ver = fw_ver;
213 nn->dp.ctrl_bar = ctrl_bar;
214 nn->dp.is_vf = 1;
215 nn->stride_tx = stride;
216 nn->stride_rx = stride;
217
218 if (rx_bar_no == tx_bar_no) {
219 u32 bar_off, bar_sz;
220 resource_size_t map_addr;
221
222 /* Make a single overlapping BAR mapping */
223 if (tx_bar_off < rx_bar_off)
224 bar_off = tx_bar_off;
225 else
226 bar_off = rx_bar_off;
227
228 if ((tx_bar_off + tx_bar_sz) > (rx_bar_off + rx_bar_sz))
229 bar_sz = (tx_bar_off + tx_bar_sz) - bar_off;
230 else
231 bar_sz = (rx_bar_off + rx_bar_sz) - bar_off;
232
233 map_addr = pci_resource_start(pdev, tx_bar_no) + bar_off;
234 vf->q_bar = ioremap_nocache(map_addr, bar_sz);
235 if (!vf->q_bar) {
236 nn_err(nn, "Failed to map resource %d\n", tx_bar_no);
237 err = -EIO;
238 goto err_netdev_free;
239 }
240
241 /* TX queues */
242 nn->tx_bar = vf->q_bar + (tx_bar_off - bar_off);
243 /* RX queues */
244 nn->rx_bar = vf->q_bar + (rx_bar_off - bar_off);
245 } else {
246 resource_size_t map_addr;
247
248 /* TX queues */
249 map_addr = pci_resource_start(pdev, tx_bar_no) + tx_bar_off;
250 nn->tx_bar = ioremap_nocache(map_addr, tx_bar_sz);
251 if (!nn->tx_bar) {
252 nn_err(nn, "Failed to map resource %d\n", tx_bar_no);
253 err = -EIO;
254 goto err_netdev_free;
255 }
256
257 /* RX queues */
258 map_addr = pci_resource_start(pdev, rx_bar_no) + rx_bar_off;
259 nn->rx_bar = ioremap_nocache(map_addr, rx_bar_sz);
260 if (!nn->rx_bar) {
261 nn_err(nn, "Failed to map resource %d\n", rx_bar_no);
262 err = -EIO;
263 goto err_unmap_tx;
264 }
265 }
266
267 nfp_netvf_get_mac_addr(nn);
268
269 num_irqs = nfp_net_irqs_alloc(pdev, vf->irq_entries,
270 NFP_NET_MIN_VNIC_IRQS,
271 NFP_NET_NON_Q_VECTORS +
272 nn->dp.num_r_vecs);
273 if (!num_irqs) {
274 nn_warn(nn, "Unable to allocate MSI-X Vectors. Exiting\n");
275 err = -EIO;
276 goto err_unmap_rx;
277 }
278 nfp_net_irqs_assign(nn, vf->irq_entries, num_irqs);
279
280 err = nfp_net_init(nn);
281 if (err)
282 goto err_irqs_disable;
283
284 nfp_net_info(nn);
285 vf->ddir = nfp_net_debugfs_device_add(pdev);
286 nfp_net_debugfs_vnic_add(nn, vf->ddir);
287
288 return 0;
289
290 err_irqs_disable:
291 nfp_net_irqs_disable(pdev);
292 err_unmap_rx:
293 if (!vf->q_bar)
294 iounmap(nn->rx_bar);
295 err_unmap_tx:
296 if (!vf->q_bar)
297 iounmap(nn->tx_bar);
298 else
299 iounmap(vf->q_bar);
300 err_netdev_free:
301 nfp_net_free(nn);
302 err_ctrl_unmap:
303 iounmap(ctrl_bar);
304 err_pci_regions:
305 pci_release_regions(pdev);
306 err_pci_disable:
307 pci_disable_device(pdev);
308 err_free_vf:
309 pci_set_drvdata(pdev, NULL);
310 kfree(vf);
311 return err;
312 }
313
nfp_netvf_pci_remove(struct pci_dev * pdev)314 static void nfp_netvf_pci_remove(struct pci_dev *pdev)
315 {
316 struct nfp_net_vf *vf = pci_get_drvdata(pdev);
317 struct nfp_net *nn = vf->nn;
318
319 /* Note, the order is slightly different from above as we need
320 * to keep the nn pointer around till we have freed everything.
321 */
322 nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
323 nfp_net_debugfs_dir_clean(&vf->ddir);
324
325 nfp_net_clean(nn);
326
327 nfp_net_irqs_disable(pdev);
328
329 if (!vf->q_bar) {
330 iounmap(nn->rx_bar);
331 iounmap(nn->tx_bar);
332 } else {
333 iounmap(vf->q_bar);
334 }
335 iounmap(nn->dp.ctrl_bar);
336
337 nfp_net_free(nn);
338
339 pci_release_regions(pdev);
340 pci_disable_device(pdev);
341
342 pci_set_drvdata(pdev, NULL);
343 kfree(vf);
344 }
345
346 struct pci_driver nfp_netvf_pci_driver = {
347 .name = nfp_net_driver_name,
348 .id_table = nfp_netvf_pci_device_ids,
349 .probe = nfp_netvf_pci_probe,
350 .remove = nfp_netvf_pci_remove,
351 };
352
