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
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16 * copyright notice, this list of conditions and the following
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20 * copyright notice, this list of conditions and the following
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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
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27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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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/module.h>
42 #include <linux/kernel.h>
43 #include <linux/init.h>
44 #include <linux/etherdevice.h>
46 #include "nfp_net_ctrl.h"
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
60 struct msix_entry irq_entries[NFP_NET_NON_Q_VECTORS +
61 NFP_NET_MAX_TX_RINGS];
67 static const char nfp_net_driver_name[] = "nfp_netvf";
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,
75 { 0, } /* Required last entry. */
77 MODULE_DEVICE_TABLE(pci, nfp_netvf_pci_device_ids);
79 static void nfp_netvf_get_mac_addr(struct nfp_net *nn)
81 u8 mac_addr[ETH_ALEN];
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]);
86 if (!is_valid_ether_addr(mac_addr)) {
87 eth_hw_addr_random(nn->dp.netdev);
91 ether_addr_copy(nn->dp.netdev->dev_addr, mac_addr);
92 ether_addr_copy(nn->dp.netdev->perm_addr, mac_addr);
95 static int nfp_netvf_pci_probe(struct pci_dev *pdev,
96 const struct pci_device_id *pci_id)
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;
111 vf = kzalloc(sizeof(*vf), GFP_KERNEL);
114 pci_set_drvdata(pdev, vf);
116 err = pci_enable_device_mem(pdev);
120 err = pci_request_regions(pdev, nfp_net_driver_name);
122 dev_err(&pdev->dev, "Unable to allocate device memory.\n");
123 goto err_pci_disable;
126 pci_set_master(pdev);
128 err = dma_set_mask_and_coherent(&pdev->dev,
129 DMA_BIT_MASK(NFP_NET_MAX_DMA_BITS));
131 goto err_pci_regions;
133 /* Map the Control BAR.
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.
139 ctrl_bar = ioremap_nocache(pci_resource_start(pdev, NFP_NET_CTRL_BAR),
143 "Failed to map resource %d\n", NFP_NET_CTRL_BAR);
145 goto err_pci_regions;
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);
156 /* Determine stride */
157 if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
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");
163 switch (fw_ver.major) {
166 tx_bar_no = NFP_NET_Q0_BAR;
167 rx_bar_no = tx_bar_no;
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);
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);
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;
186 if (tx_bar_sz > pci_resource_len(pdev, tx_bar_no)) {
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;
192 if (rx_bar_sz > pci_resource_len(pdev, rx_bar_no)) {
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;
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);
204 /* Allocate and initialise the netdev */
205 nn = nfp_net_alloc(pdev, true, max_tx_rings, max_rx_rings);
213 nn->dp.ctrl_bar = ctrl_bar;
215 nn->stride_tx = stride;
216 nn->stride_rx = stride;
218 if (rx_bar_no == tx_bar_no) {
220 resource_size_t map_addr;
222 /* Make a single overlapping BAR mapping */
223 if (tx_bar_off < rx_bar_off)
224 bar_off = tx_bar_off;
226 bar_off = rx_bar_off;
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;
231 bar_sz = (rx_bar_off + rx_bar_sz) - bar_off;
233 map_addr = pci_resource_start(pdev, tx_bar_no) + bar_off;
234 vf->q_bar = ioremap_nocache(map_addr, bar_sz);
236 nn_err(nn, "Failed to map resource %d\n", tx_bar_no);
238 goto err_netdev_free;
242 nn->tx_bar = vf->q_bar + (tx_bar_off - bar_off);
244 nn->rx_bar = vf->q_bar + (rx_bar_off - bar_off);
246 resource_size_t map_addr;
249 map_addr = pci_resource_start(pdev, tx_bar_no) + tx_bar_off;
250 nn->tx_bar = ioremap_nocache(map_addr, tx_bar_sz);
252 nn_err(nn, "Failed to map resource %d\n", tx_bar_no);
254 goto err_netdev_free;
258 map_addr = pci_resource_start(pdev, rx_bar_no) + rx_bar_off;
259 nn->rx_bar = ioremap_nocache(map_addr, rx_bar_sz);
261 nn_err(nn, "Failed to map resource %d\n", rx_bar_no);
267 nfp_netvf_get_mac_addr(nn);
269 num_irqs = nfp_net_irqs_alloc(pdev, vf->irq_entries,
270 NFP_NET_MIN_VNIC_IRQS,
271 NFP_NET_NON_Q_VECTORS +
274 nn_warn(nn, "Unable to allocate MSI-X Vectors. Exiting\n");
278 nfp_net_irqs_assign(nn, vf->irq_entries, num_irqs);
280 /* Get ME clock frequency from ctrl BAR
281 * XXX for now frequency is hardcoded until we figure out how
282 * to get the value from nfp-hwinfo into ctrl bar
284 nn->me_freq_mhz = 1200;
286 err = nfp_net_init(nn);
288 goto err_irqs_disable;
291 vf->ddir = nfp_net_debugfs_device_add(pdev);
292 nfp_net_debugfs_vnic_add(nn, vf->ddir, 0);
297 nfp_net_irqs_disable(pdev);
311 pci_release_regions(pdev);
313 pci_disable_device(pdev);
315 pci_set_drvdata(pdev, NULL);
320 static void nfp_netvf_pci_remove(struct pci_dev *pdev)
322 struct nfp_net_vf *vf = pci_get_drvdata(pdev);
323 struct nfp_net *nn = vf->nn;
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_dir_clean(&nn->debugfs_dir);
329 nfp_net_debugfs_dir_clean(&vf->ddir);
333 nfp_net_irqs_disable(pdev);
341 iounmap(nn->dp.ctrl_bar);
345 pci_release_regions(pdev);
346 pci_disable_device(pdev);
348 pci_set_drvdata(pdev, NULL);
352 struct pci_driver nfp_netvf_pci_driver = {
353 .name = nfp_net_driver_name,
354 .id_table = nfp_netvf_pci_device_ids,
355 .probe = nfp_netvf_pci_probe,
356 .remove = nfp_netvf_pci_remove,