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// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/pci.h>
#include "ionic.h"
#include "ionic_bus.h"
#include "ionic_debugfs.h"
/* Supported devices */
static const struct pci_device_id ionic_id_table[] = {
{ PCI_VDEVICE(PENSANDO, PCI_DEVICE_ID_PENSANDO_IONIC_ETH_PF) },
{ PCI_VDEVICE(PENSANDO, PCI_DEVICE_ID_PENSANDO_IONIC_ETH_VF) },
{ 0, } /* end of table */
};
MODULE_DEVICE_TABLE(pci, ionic_id_table);
const char *ionic_bus_info(struct ionic *ionic)
{
return pci_name(ionic->pdev);
}
static int ionic_map_bars(struct ionic *ionic)
{
struct pci_dev *pdev = ionic->pdev;
struct device *dev = ionic->dev;
struct ionic_dev_bar *bars;
unsigned int i, j;
bars = ionic->bars;
ionic->num_bars = 0;
for (i = 0, j = 0; i < IONIC_BARS_MAX; i++) {
if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
continue;
bars[j].len = pci_resource_len(pdev, i);
/* only map the whole bar 0 */
if (j > 0) {
bars[j].vaddr = NULL;
} else {
bars[j].vaddr = pci_iomap(pdev, i, bars[j].len);
if (!bars[j].vaddr) {
dev_err(dev,
"Cannot memory-map BAR %d, aborting\n",
i);
return -ENODEV;
}
}
bars[j].bus_addr = pci_resource_start(pdev, i);
bars[j].res_index = i;
ionic->num_bars++;
j++;
}
return 0;
}
static void ionic_unmap_bars(struct ionic *ionic)
{
struct ionic_dev_bar *bars = ionic->bars;
unsigned int i;
for (i = 0; i < IONIC_BARS_MAX; i++) {
if (bars[i].vaddr) {
iounmap(bars[i].vaddr);
bars[i].bus_addr = 0;
bars[i].vaddr = NULL;
bars[i].len = 0;
}
}
}
static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct device *dev = &pdev->dev;
struct ionic *ionic;
int err;
ionic = ionic_devlink_alloc(dev);
if (!ionic)
return -ENOMEM;
ionic->pdev = pdev;
ionic->dev = dev;
pci_set_drvdata(pdev, ionic);
mutex_init(&ionic->dev_cmd_lock);
/* Query system for DMA addressing limitation for the device. */
err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(IONIC_ADDR_LEN));
if (err) {
dev_err(dev, "Unable to obtain 64-bit DMA for consistent allocations, aborting. err=%d\n",
err);
goto err_out_clear_drvdata;
}
ionic_debugfs_add_dev(ionic);
/* Setup PCI device */
err = pci_enable_device_mem(pdev);
if (err) {
dev_err(dev, "Cannot enable PCI device: %d, aborting\n", err);
goto err_out_debugfs_del_dev;
}
err = pci_request_regions(pdev, IONIC_DRV_NAME);
if (err) {
dev_err(dev, "Cannot request PCI regions: %d, aborting\n", err);
goto err_out_pci_disable_device;
}
pci_set_master(pdev);
err = ionic_map_bars(ionic);
if (err)
goto err_out_pci_clear_master;
/* Configure the device */
err = ionic_setup(ionic);
if (err) {
dev_err(dev, "Cannot setup device: %d, aborting\n", err);
goto err_out_unmap_bars;
}
err = ionic_identify(ionic);
if (err) {
dev_err(dev, "Cannot identify device: %d, aborting\n", err);
goto err_out_teardown;
}
err = ionic_init(ionic);
if (err) {
dev_err(dev, "Cannot init device: %d, aborting\n", err);
goto err_out_teardown;
}
err = ionic_devlink_register(ionic);
if (err)
dev_err(dev, "Cannot register devlink: %d\n", err);
return 0;
err_out_teardown:
ionic_dev_teardown(ionic);
err_out_unmap_bars:
ionic_unmap_bars(ionic);
pci_release_regions(pdev);
err_out_pci_clear_master:
pci_clear_master(pdev);
err_out_pci_disable_device:
pci_disable_device(pdev);
err_out_debugfs_del_dev:
ionic_debugfs_del_dev(ionic);
err_out_clear_drvdata:
mutex_destroy(&ionic->dev_cmd_lock);
ionic_devlink_free(ionic);
return err;
}
static void ionic_remove(struct pci_dev *pdev)
{
struct ionic *ionic = pci_get_drvdata(pdev);
if (!ionic)
return;
ionic_devlink_unregister(ionic);
ionic_reset(ionic);
ionic_dev_teardown(ionic);
ionic_unmap_bars(ionic);
pci_release_regions(pdev);
pci_clear_master(pdev);
pci_disable_device(pdev);
ionic_debugfs_del_dev(ionic);
mutex_destroy(&ionic->dev_cmd_lock);
ionic_devlink_free(ionic);
}
static struct pci_driver ionic_driver = {
.name = IONIC_DRV_NAME,
.id_table = ionic_id_table,
.probe = ionic_probe,
.remove = ionic_remove,
};
int ionic_bus_register_driver(void)
{
return pci_register_driver(&ionic_driver);
}
void ionic_bus_unregister_driver(void)
{
pci_unregister_driver(&ionic_driver);
}
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