/*
* Copyright (C) 2015-2017 Netronome Systems, Inc.
*
* This software is dual licensed under the GNU General License Version 2,
* June 1991 as shown in the file COPYING in the top-level directory of this
* source tree or the BSD 2-Clause License provided below. You have the
* option to license this software under the complete terms of either license.
*
* The BSD 2-Clause License:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/*
* nfp_main.c
* Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
* Alejandro Lucero <alejandro.lucero@netronome.com>
* Jason McMullan <jason.mcmullan@netronome.com>
* Rolf Neugebauer <rolf.neugebauer@netronome.com>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/firmware.h>
#include <linux/vermagic.h>
#include "nfpcore/nfp.h"
#include "nfpcore/nfp_cpp.h"
#include "nfpcore/nfp_nsp_eth.h"
#include "nfpcore/nfp6000_pcie.h"
#include "nfp_main.h"
#include "nfp_net.h"
static const char nfp_driver_name[] = "nfp";
const char nfp_driver_version[] = VERMAGIC_STRING;
static const struct pci_device_id nfp_pci_device_ids[] = {
{ PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP6000,
PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID,
PCI_ANY_ID, 0,
},
{ PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP4000,
PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID,
PCI_ANY_ID, 0,
},
{ 0, } /* Required last entry. */
};
MODULE_DEVICE_TABLE(pci, nfp_pci_device_ids);
static int nfp_pcie_sriov_enable(struct pci_dev *pdev, int num_vfs)
{
#ifdef CONFIG_PCI_IOV
struct nfp_pf *pf = pci_get_drvdata(pdev);
int err;
err = pci_enable_sriov(pdev, num_vfs);
if (err) {
dev_warn(&pdev->dev, "Failed to enable PCI sriov: %d\n", err);
return err;
}
pf->num_vfs = num_vfs;
dev_dbg(&pdev->dev, "Created %d VFs.\n", pf->num_vfs);
return num_vfs;
#endif
return 0;
}
static int nfp_pcie_sriov_disable(struct pci_dev *pdev)
{
#ifdef CONFIG_PCI_IOV
struct nfp_pf *pf = pci_get_drvdata(pdev);
/* If the VFs are assigned we cannot shut down SR-IOV without
* causing issues, so just leave the hardware available but
* disabled
*/
if (pci_vfs_assigned(pdev)) {
dev_warn(&pdev->dev, "Disabling while VFs assigned - VFs will not be deallocated\n");
return -EPERM;
}
pf->num_vfs = 0;
pci_disable_sriov(pdev);
dev_dbg(&pdev->dev, "Removed VFs.\n");
#endif
return 0;
}
static int nfp_pcie_sriov_configure(struct pci_dev *pdev, int num_vfs)
{
if (num_vfs == 0)
return nfp_pcie_sriov_disable(pdev);
else
return nfp_pcie_sriov_enable(pdev, num_vfs);
}
/**
* nfp_net_fw_find() - Find the correct firmware image for netdev mode
* @pdev: PCI Device structure
* @pf: NFP PF Device structure
*
* Return: firmware if found and requested successfully.
*/
static const struct firmware *
nfp_net_fw_find(struct pci_dev *pdev, struct nfp_pf *pf)
{
const struct firmware *fw = NULL;
struct nfp_eth_table_port *port;
const char *fw_model;
char fw_name[256];
int spc, err = 0;
int i, j;
if (!pf->eth_tbl) {
dev_err(&pdev->dev, "Error: can't identify media config\n");
return NULL;
}
fw_model = nfp_hwinfo_lookup(pf->cpp, "assembly.partno");
if (!fw_model) {
dev_err(&pdev->dev, "Error: can't read part number\n");
return NULL;
}
spc = ARRAY_SIZE(fw_name);
spc -= snprintf(fw_name, spc, "netronome/nic_%s", fw_model);
for (i = 0; spc > 0 && i < pf->eth_tbl->count; i += j) {
port = &pf->eth_tbl->ports[i];
j = 1;
while (i + j < pf->eth_tbl->count &&
port->speed == port[j].speed)
j++;
spc -= snprintf(&fw_name[ARRAY_SIZE(fw_name) - spc], spc,
"_%dx%d", j, port->speed / 1000);
}
if (spc <= 0)
return NULL;
spc -= snprintf(&fw_name[ARRAY_SIZE(fw_name) - spc], spc, ".nffw");
if (spc <= 0)
return NULL;
err = request_firmware(&fw, fw_name, &pdev->dev);
if (err)
return NULL;
dev_info(&pdev->dev, "Loading FW image: %s\n", fw_name);
return fw;
}
/**
* nfp_net_fw_load() - Load the firmware image
* @pdev: PCI Device structure
* @pf: NFP PF Device structure
* @nsp: NFP SP handle
*
* Return: -ERRNO, 0 for no firmware loaded, 1 for firmware loaded
*/
static int
nfp_fw_load(struct pci_dev *pdev, struct nfp_pf *pf, struct nfp_nsp *nsp)
{
const struct firmware *fw;
u16 interface;
int err;
interface = nfp_cpp_interface(pf->cpp);
if (NFP_CPP_INTERFACE_UNIT_of(interface) != 0) {
/* Only Unit 0 should reset or load firmware */
dev_info(&pdev->dev, "Firmware will be loaded by partner\n");
return 0;
}
fw = nfp_net_fw_find(pdev, pf);
if (!fw)
return 0;
dev_info(&pdev->dev, "Soft-reset, loading FW image\n");
err = nfp_nsp_device_soft_reset(nsp);
if (err < 0) {
dev_err(&pdev->dev, "Failed to soft reset the NFP: %d\n",
err);
goto exit_release_fw;
}
err = nfp_nsp_load_fw(nsp, fw);
if (err < 0) {
dev_err(&pdev->dev, "FW loading failed: %d\n", err);
goto exit_release_fw;
}
dev_info(&pdev->dev, "Finished loading FW image\n");
exit_release_fw:
release_firmware(fw);
return err < 0 ? err : 1;
}
static int nfp_nsp_init(struct pci_dev *pdev, struct nfp_pf *pf)
{
struct nfp_nsp *nsp;
int err;
nsp = nfp_nsp_open(pf->cpp);
if (IS_ERR(nsp)) {
err = PTR_ERR(nsp);
dev_err(&pdev->dev, "Failed to access the NSP: %d\n", err);
return err;
}
err = nfp_nsp_wait(nsp);
if (err < 0)
goto exit_close_nsp;
pf->eth_tbl = __nfp_eth_read_ports(pf->cpp, nsp);
err = nfp_fw_load(pdev, pf, nsp);
if (err < 0) {
kfree(pf->eth_tbl);
dev_err(&pdev->dev, "Failed to load FW\n");
goto exit_close_nsp;
}
pf->fw_loaded = !!err;
err = 0;
exit_close_nsp:
nfp_nsp_close(nsp);
return err;
}
static void nfp_fw_unload(struct nfp_pf *pf)
{
struct nfp_nsp *nsp;
int err;
nsp = nfp_nsp_open(pf->cpp);
if (IS_ERR(nsp)) {
nfp_err(pf->cpp, "Reset failed, can't open NSP\n");
return;
}
err = nfp_nsp_device_soft_reset(nsp);
if (err < 0)
dev_warn(&pf->pdev->dev, "Couldn't unload firmware: %d\n", err);
else
dev_info(&pf->pdev->dev, "Firmware safely unloaded\n");
nfp_nsp_close(nsp);
}
static int nfp_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *pci_id)
{
struct nfp_pf *pf;
int err;
err = pci_enable_device(pdev);
if (err < 0)
return err;
pci_set_master(pdev);
err = dma_set_mask_and_coherent(&pdev->dev,
DMA_BIT_MASK(NFP_NET_MAX_DMA_BITS));
if (err)
goto err_pci_disable;
err = pci_request_regions(pdev, nfp_driver_name);
if (err < 0) {
dev_err(&pdev->dev, "Unable to reserve pci resources.\n");
goto err_pci_disable;
}
pf = kzalloc(sizeof(*pf), GFP_KERNEL);
if (!pf) {
err = -ENOMEM;
goto err_rel_regions;
}
INIT_LIST_HEAD(&pf->ports);
pci_set_drvdata(pdev, pf);
pf->pdev = pdev;
pf->cpp = nfp_cpp_from_nfp6000_pcie(pdev);
if (IS_ERR_OR_NULL(pf->cpp)) {
err = PTR_ERR(pf->cpp);
if (err >= 0)
err = -ENOMEM;
goto err_disable_msix;
}
dev_info(&pdev->dev, "Assembly: %s%s%s-%s CPLD: %s\n",
nfp_hwinfo_lookup(pf->cpp, "assembly.vendor"),
nfp_hwinfo_lookup(pf->cpp, "assembly.partno"),
nfp_hwinfo_lookup(pf->cpp, "assembly.serial"),
nfp_hwinfo_lookup(pf->cpp, "assembly.revision"),
nfp_hwinfo_lookup(pf->cpp, "cpld.version"));
err = nfp_nsp_init(pdev, pf);
if (err)
goto err_cpp_free;
err = nfp_net_pci_probe(pf);
if (err)
goto err_fw_unload;
return 0;
err_fw_unload:
if (pf->fw_loaded)
nfp_fw_unload(pf);
kfree(pf->eth_tbl);
err_cpp_free:
nfp_cpp_free(pf->cpp);
err_disable_msix:
pci_set_drvdata(pdev, NULL);
kfree(pf);
err_rel_regions:
pci_release_regions(pdev);
err_pci_disable:
pci_disable_device(pdev);
return err;
}
static void nfp_pci_remove(struct pci_dev *pdev)
{
struct nfp_pf *pf = pci_get_drvdata(pdev);
if (!list_empty(&pf->ports))
nfp_net_pci_remove(pf);
nfp_pcie_sriov_disable(pdev);
if (pf->fw_loaded)
nfp_fw_unload(pf);
pci_set_drvdata(pdev, NULL);
nfp_cpp_free(pf->cpp);
kfree(pf->eth_tbl);
kfree(pf);
pci_release_regions(pdev);
pci_disable_device(pdev);
}
static struct pci_driver nfp_pci_driver = {
.name = nfp_driver_name,
.id_table = nfp_pci_device_ids,
.probe = nfp_pci_probe,
.remove = nfp_pci_remove,
.sriov_configure = nfp_pcie_sriov_configure,
};
static int __init nfp_main_init(void)
{
int err;
pr_info("%s: NFP PCIe Driver, Copyright (C) 2014-2017 Netronome Systems\n",
nfp_driver_name);
nfp_net_debugfs_create();
err = pci_register_driver(&nfp_pci_driver);
if (err < 0)
goto err_destroy_debugfs;
err = pci_register_driver(&nfp_netvf_pci_driver);
if (err)
goto err_unreg_pf;
return err;
err_unreg_pf:
pci_unregister_driver(&nfp_pci_driver);
err_destroy_debugfs:
nfp_net_debugfs_destroy();
return err;
}
static void __exit nfp_main_exit(void)
{
pci_unregister_driver(&nfp_netvf_pci_driver);
pci_unregister_driver(&nfp_pci_driver);
nfp_net_debugfs_destroy();
}
module_init(nfp_main_init);
module_exit(nfp_main_exit);
MODULE_FIRMWARE("netronome/nic_AMDA0081-0001_1x40.nffw");
MODULE_FIRMWARE("netronome/nic_AMDA0081-0001_4x10.nffw");
MODULE_FIRMWARE("netronome/nic_AMDA0096-0001_2x10.nffw");
MODULE_FIRMWARE("netronome/nic_AMDA0097-0001_2x40.nffw");
MODULE_FIRMWARE("netronome/nic_AMDA0097-0001_4x10_1x40.nffw");
MODULE_FIRMWARE("netronome/nic_AMDA0097-0001_8x10.nffw");
MODULE_FIRMWARE("netronome/nic_AMDA0099-0001_2x10.nffw");
MODULE_FIRMWARE("netronome/nic_AMDA0099-0001_2x25.nffw");
MODULE_AUTHOR("Netronome Systems <oss-drivers@netronome.com>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("The Netronome Flow Processor (NFP) driver.");
