1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
4 #include <linux/module.h>
5 #include <linux/netdevice.h>
6 #include <linux/etherdevice.h>
10 #include "ionic_bus.h"
11 #include "ionic_lif.h"
12 #include "ionic_debugfs.h"
14 /* Supported devices */
15 static const struct pci_device_id ionic_id_table[] = {
16 { PCI_VDEVICE(PENSANDO, PCI_DEVICE_ID_PENSANDO_IONIC_ETH_PF) },
17 { PCI_VDEVICE(PENSANDO, PCI_DEVICE_ID_PENSANDO_IONIC_ETH_VF) },
18 { 0, } /* end of table */
20 MODULE_DEVICE_TABLE(pci, ionic_id_table);
22 int ionic_bus_get_irq(struct ionic *ionic, unsigned int num)
24 return pci_irq_vector(ionic->pdev, num);
27 const char *ionic_bus_info(struct ionic *ionic)
29 return pci_name(ionic->pdev);
32 int ionic_bus_alloc_irq_vectors(struct ionic *ionic, unsigned int nintrs)
34 return pci_alloc_irq_vectors(ionic->pdev, nintrs, nintrs,
38 void ionic_bus_free_irq_vectors(struct ionic *ionic)
43 pci_free_irq_vectors(ionic->pdev);
46 static int ionic_map_bars(struct ionic *ionic)
48 struct pci_dev *pdev = ionic->pdev;
49 struct device *dev = ionic->dev;
50 struct ionic_dev_bar *bars;
56 for (i = 0, j = 0; i < IONIC_BARS_MAX; i++) {
57 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
59 bars[j].len = pci_resource_len(pdev, i);
61 /* only map the whole bar 0 */
65 bars[j].vaddr = pci_iomap(pdev, i, bars[j].len);
68 "Cannot memory-map BAR %d, aborting\n",
74 bars[j].bus_addr = pci_resource_start(pdev, i);
75 bars[j].res_index = i;
83 static void ionic_unmap_bars(struct ionic *ionic)
85 struct ionic_dev_bar *bars = ionic->bars;
88 for (i = 0; i < IONIC_BARS_MAX; i++) {
90 iounmap(bars[i].vaddr);
98 void __iomem *ionic_bus_map_dbpage(struct ionic *ionic, int page_num)
100 return pci_iomap_range(ionic->pdev,
101 ionic->bars[IONIC_PCI_BAR_DBELL].res_index,
102 (u64)page_num << PAGE_SHIFT, PAGE_SIZE);
105 void ionic_bus_unmap_dbpage(struct ionic *ionic, void __iomem *page)
110 static void ionic_vf_dealloc_locked(struct ionic *ionic)
119 for (i = ionic->num_vfs - 1; i >= 0; i--) {
123 (void)ionic_set_vf_config(ionic, i,
124 IONIC_VF_ATTR_STATSADDR,
126 dma_unmap_single(ionic->dev, v->stats_pa,
127 sizeof(v->stats), DMA_FROM_DEVICE);
137 static void ionic_vf_dealloc(struct ionic *ionic)
139 down_write(&ionic->vf_op_lock);
140 ionic_vf_dealloc_locked(ionic);
141 up_write(&ionic->vf_op_lock);
144 static int ionic_vf_alloc(struct ionic *ionic, int num_vfs)
150 down_write(&ionic->vf_op_lock);
152 ionic->vfs = kcalloc(num_vfs, sizeof(struct ionic_vf), GFP_KERNEL);
158 for (i = 0; i < num_vfs; i++) {
160 v->stats_pa = dma_map_single(ionic->dev, &v->stats,
161 sizeof(v->stats), DMA_FROM_DEVICE);
162 if (dma_mapping_error(ionic->dev, v->stats_pa)) {
168 /* ignore failures from older FW, we just won't get stats */
169 (void)ionic_set_vf_config(ionic, i, IONIC_VF_ATTR_STATSADDR,
176 ionic_vf_dealloc_locked(ionic);
177 up_write(&ionic->vf_op_lock);
181 static int ionic_sriov_configure(struct pci_dev *pdev, int num_vfs)
183 struct ionic *ionic = pci_get_drvdata(pdev);
184 struct device *dev = ionic->dev;
188 ret = pci_enable_sriov(pdev, num_vfs);
190 dev_err(dev, "Cannot enable SRIOV: %d\n", ret);
194 ret = ionic_vf_alloc(ionic, num_vfs);
196 dev_err(dev, "Cannot alloc VFs: %d\n", ret);
197 pci_disable_sriov(pdev);
203 pci_disable_sriov(pdev);
204 ionic_vf_dealloc(ionic);
211 static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
213 struct device *dev = &pdev->dev;
218 ionic = ionic_devlink_alloc(dev);
224 pci_set_drvdata(pdev, ionic);
225 mutex_init(&ionic->dev_cmd_lock);
227 /* Query system for DMA addressing limitation for the device. */
228 err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(IONIC_ADDR_LEN));
230 dev_err(dev, "Unable to obtain 64-bit DMA for consistent allocations, aborting. err=%d\n",
232 goto err_out_clear_drvdata;
235 ionic_debugfs_add_dev(ionic);
237 /* Setup PCI device */
238 err = pci_enable_device_mem(pdev);
240 dev_err(dev, "Cannot enable PCI device: %d, aborting\n", err);
241 goto err_out_debugfs_del_dev;
244 err = pci_request_regions(pdev, IONIC_DRV_NAME);
246 dev_err(dev, "Cannot request PCI regions: %d, aborting\n", err);
247 goto err_out_pci_disable_device;
250 pci_set_master(pdev);
251 pcie_print_link_status(pdev);
253 err = ionic_map_bars(ionic);
255 goto err_out_pci_clear_master;
257 /* Configure the device */
258 err = ionic_setup(ionic);
260 dev_err(dev, "Cannot setup device: %d, aborting\n", err);
261 goto err_out_unmap_bars;
264 err = ionic_identify(ionic);
266 dev_err(dev, "Cannot identify device: %d, aborting\n", err);
267 goto err_out_teardown;
270 err = ionic_init(ionic);
272 dev_err(dev, "Cannot init device: %d, aborting\n", err);
273 goto err_out_teardown;
276 /* Configure the ports */
277 err = ionic_port_identify(ionic);
279 dev_err(dev, "Cannot identify port: %d, aborting\n", err);
283 err = ionic_port_init(ionic);
285 dev_err(dev, "Cannot init port: %d, aborting\n", err);
290 err = ionic_lif_identify(ionic, IONIC_LIF_TYPE_CLASSIC,
293 dev_err(dev, "Cannot identify LIFs: %d, aborting\n", err);
294 goto err_out_port_reset;
297 err = ionic_lifs_size(ionic);
299 dev_err(dev, "Cannot size LIFs: %d, aborting\n", err);
300 goto err_out_port_reset;
303 err = ionic_lifs_alloc(ionic);
305 dev_err(dev, "Cannot allocate LIFs: %d, aborting\n", err);
306 goto err_out_free_irqs;
309 err = ionic_lifs_init(ionic);
311 dev_err(dev, "Cannot init LIFs: %d, aborting\n", err);
312 goto err_out_free_lifs;
315 init_rwsem(&ionic->vf_op_lock);
316 num_vfs = pci_num_vf(pdev);
318 dev_info(dev, "%d VFs found already enabled\n", num_vfs);
319 err = ionic_vf_alloc(ionic, num_vfs);
321 dev_err(dev, "Cannot enable existing VFs: %d\n", err);
324 err = ionic_lifs_register(ionic);
326 dev_err(dev, "Cannot register LIFs: %d, aborting\n", err);
327 goto err_out_deinit_lifs;
330 err = ionic_devlink_register(ionic);
332 dev_err(dev, "Cannot register devlink: %d\n", err);
333 goto err_out_deregister_lifs;
338 err_out_deregister_lifs:
339 ionic_lifs_unregister(ionic);
341 ionic_vf_dealloc(ionic);
342 ionic_lifs_deinit(ionic);
344 ionic_lifs_free(ionic);
346 ionic_bus_free_irq_vectors(ionic);
348 ionic_port_reset(ionic);
352 ionic_dev_teardown(ionic);
353 /* Don't fail the probe for these errors, keep
354 * the hw interface around for inspection
359 ionic_unmap_bars(ionic);
360 pci_release_regions(pdev);
361 err_out_pci_clear_master:
362 pci_clear_master(pdev);
363 err_out_pci_disable_device:
364 pci_disable_device(pdev);
365 err_out_debugfs_del_dev:
366 ionic_debugfs_del_dev(ionic);
367 err_out_clear_drvdata:
368 mutex_destroy(&ionic->dev_cmd_lock);
369 ionic_devlink_free(ionic);
374 static void ionic_remove(struct pci_dev *pdev)
376 struct ionic *ionic = pci_get_drvdata(pdev);
381 if (ionic->master_lif) {
382 ionic_devlink_unregister(ionic);
383 ionic_lifs_unregister(ionic);
384 ionic_lifs_deinit(ionic);
385 ionic_lifs_free(ionic);
386 ionic_bus_free_irq_vectors(ionic);
389 ionic_port_reset(ionic);
391 ionic_dev_teardown(ionic);
392 ionic_unmap_bars(ionic);
393 pci_release_regions(pdev);
394 pci_clear_master(pdev);
395 pci_disable_device(pdev);
396 ionic_debugfs_del_dev(ionic);
397 mutex_destroy(&ionic->dev_cmd_lock);
398 ionic_devlink_free(ionic);
401 static struct pci_driver ionic_driver = {
402 .name = IONIC_DRV_NAME,
403 .id_table = ionic_id_table,
404 .probe = ionic_probe,
405 .remove = ionic_remove,
406 .sriov_configure = ionic_sriov_configure,
409 int ionic_bus_register_driver(void)
411 return pci_register_driver(&ionic_driver);
414 void ionic_bus_unregister_driver(void)
416 pci_unregister_driver(&ionic_driver);