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nfp: add the PF driver

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Add PF driver for NFP4000 and NFP6000.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2017-02-09 09:17:38 -08:00 committed by David S. Miller
parent fdace6c224
commit 63461a028f
5 changed files with 970 additions and 23 deletions
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1
drivers/net/ethernet/netronome/nfp/Makefile
View File

@ -16,6 +16,7 @@ nfp-objs := \
nfp_net_common.o \
nfp_net_ethtool.o \
nfp_net_offload.o \
nfp_net_main.o \
nfp_netvf_main.o
ifeq ($(CONFIG_BPF_SYSCALL),y)

332
drivers/net/ethernet/netronome/nfp/nfp_main.c
View File

@ -45,12 +45,326 @@
#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_NFP6000,
PCI_VENDOR_ID_NETRONOME, PCI_ANY_ID,
PCI_ANY_ID, 0,
},
{ PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_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 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_nsp *nsp;
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;
}
nsp = nfp_nsp_open(pf->cpp);
if (IS_ERR(nsp)) {
err = PTR_ERR(nsp);
goto err_cpp_free;
}
err = nfp_nsp_wait(nsp);
if (err < 0) {
nfp_nsp_close(nsp);
goto err_cpp_free;
}
pf->eth_tbl = __nfp_eth_read_ports(pf->cpp, nsp);
err = nfp_fw_load(pdev, pf, nsp);
nfp_nsp_close(nsp);
if (err < 0) {
dev_err(&pdev->dev, "Failed to load FW\n");
goto err_eth_tbl_free;
}
pf->fw_loaded = !!err;
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);
err_eth_tbl_free:
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;
@ -60,12 +374,18 @@ static int __init nfp_main_init(void)
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_destroy_debugfs;
goto err_unreg_pf;
return err;
err_unreg_pf:
pci_unregister_driver(&nfp_pci_driver);
err_destroy_debugfs:
nfp_net_debugfs_destroy();
return err;
@ -74,12 +394,22 @@ err_destroy_debugfs:
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.");

49
drivers/net/ethernet/netronome/nfp/nfp_main.h
View File

@ -39,10 +39,59 @@
#ifndef NFP_MAIN_H
#define NFP_MAIN_H
#include <linux/list.h>
#include <linux/types.h>
#include <linux/msi.h>
#include <linux/pci.h>
struct dentry;
struct pci_dev;
struct nfp_cpp;
struct nfp_cpp_area;
struct nfp_eth_table;
/**
* struct nfp_pf - NFP PF-specific device structure
* @pdev: Backpointer to PCI device
* @cpp: Pointer to the CPP handle
* @ctrl_area: Pointer to the CPP area for the control BAR
* @tx_area: Pointer to the CPP area for the TX queues
* @rx_area: Pointer to the CPP area for the FL/RX queues
* @irq_entries: Array of MSI-X entries for all ports
* @num_vfs: Number of SR-IOV VFs enabled
* @fw_loaded: Is the firmware loaded?
* @eth_tbl: NSP ETH table
* @ddir: Per-device debugfs directory
* @num_ports: Number of adapter ports
* @ports: Linked list of port structures (struct nfp_net)
*/
struct nfp_pf {
struct pci_dev *pdev;
struct nfp_cpp *cpp;
struct nfp_cpp_area *ctrl_area;
struct nfp_cpp_area *tx_area;
struct nfp_cpp_area *rx_area;
struct msix_entry *irq_entries;
unsigned int num_vfs;
bool fw_loaded;
struct nfp_eth_table *eth_tbl;
struct dentry *ddir;
unsigned int num_ports;
struct list_head ports;
};
extern struct pci_driver nfp_netvf_pci_driver;
int nfp_net_pci_probe(struct nfp_pf *pf);
void nfp_net_pci_remove(struct nfp_pf *pf);
#endif /* NFP_MAIN_H */

26
drivers/net/ethernet/netronome/nfp/nfp_net.h
View File

@ -43,6 +43,7 @@
#define _NFP_NET_H_
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/io-64-nonatomic-hi-lo.h>
@ -434,20 +435,13 @@ struct nfp_stat_pair {
* struct nfp_net - NFP network device structure
* @pdev: Backpointer to PCI device
* @netdev: Backpointer to net_device structure
* @nfp_fallback: Is the driver used in fallback mode?
* @is_vf: Is the driver attached to a VF?
* @fw_loaded: Is the firmware loaded?
* @bpf_offload_skip_sw: Offloaded BPF program will not be rerun by cls_bpf
* @bpf_offload_xdp: Offloaded BPF program is XDP
* @ctrl: Local copy of the control register/word.
* @fl_bufsz: Currently configured size of the freelist buffers
* @rx_offset: Offset in the RX buffers where packet data starts
* @xdp_prog: Installed XDP program
* @cpp: Pointer to the CPP handle
* @nfp_dev_cpp: Pointer to the NFP Device handle
* @ctrl_area: Pointer to the CPP area for the control BAR
* @tx_area: Pointer to the CPP area for the TX queues
* @rx_area: Pointer to the CPP area for the FL/RX queues
* @fw_ver: Firmware version
* @cap: Capabilities advertised by the Firmware
* @max_mtu: Maximum support MTU advertised by the Firmware
@ -497,14 +491,13 @@ struct nfp_stat_pair {
* @tx_bar: Pointer to mapped TX queues
* @rx_bar: Pointer to mapped FL/RX queues
* @debugfs_dir: Device directory in debugfs
* @port_list: Entry on device port list
*/
struct nfp_net {
struct pci_dev *pdev;
struct net_device *netdev;
unsigned nfp_fallback:1;
unsigned is_vf:1;
unsigned fw_loaded:1;
unsigned bpf_offload_skip_sw:1;
unsigned bpf_offload_xdp:1;
@ -518,18 +511,6 @@ struct nfp_net {
struct nfp_net_tx_ring *tx_rings;
struct nfp_net_rx_ring *rx_rings;
#ifdef CONFIG_PCI_IOV
unsigned int num_vfs;
struct vf_data_storage *vfinfo;
int vf_rate_link_speed;
#endif
struct nfp_cpp *cpp;
struct platform_device *nfp_dev_cpp;
struct nfp_cpp_area *ctrl_area;
struct nfp_cpp_area *tx_area;
struct nfp_cpp_area *rx_area;
struct nfp_net_fw_version fw_ver;
u32 cap;
u32 max_mtu;
@ -592,11 +573,12 @@ struct nfp_net {
u8 __iomem *qcp_cfg;
u8 __iomem *ctrl_bar;
u8 __iomem *q_bar;
u8 __iomem *tx_bar;
u8 __iomem *rx_bar;
struct dentry *debugfs_dir;
struct list_head port_list;
};
struct nfp_net_ring_set {

585
drivers/net/ethernet/netronome/nfp/nfp_net_main.c Normal file
View File

@ -0,0 +1,585 @@
/*
* 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_net_main.c
* Netronome network device driver: Main entry point
* 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/etherdevice.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/pci_regs.h>
#include <linux/msi.h>
#include <linux/random.h>
#include "nfpcore/nfp.h"
#include "nfpcore/nfp_cpp.h"
#include "nfpcore/nfp_nffw.h"
#include "nfpcore/nfp_nsp_eth.h"
#include "nfpcore/nfp6000_pcie.h"
#include "nfp_net_ctrl.h"
#include "nfp_net.h"
#include "nfp_main.h"
#define NFP_PF_CSR_SLICE_SIZE (32 * 1024)
static int nfp_is_ready(struct nfp_cpp *cpp)
{
const char *cp;
long state;
int err;
cp = nfp_hwinfo_lookup(cpp, "board.state");
if (!cp)
return 0;
err = kstrtol(cp, 0, &state);
if (err < 0)
return 0;
return state == 15;
}
/**
* nfp_net_map_area() - Help function to map an area
* @cpp: NFP CPP handler
* @name: Name for the area
* @target: CPP target
* @addr: CPP address
* @size: Size of the area
* @area: Area handle (returned).
*
* This function is primarily to simplify the code in the main probe
* function. To undo the effect of this functions call
* @nfp_cpp_area_release_free(*area);
*
* Return: Pointer to memory mapped area or ERR_PTR
*/
static u8 __iomem *nfp_net_map_area(struct nfp_cpp *cpp,
const char *name, int isl, int target,
unsigned long long addr, unsigned long size,
struct nfp_cpp_area **area)
{
u8 __iomem *res;
u32 dest;
int err;
dest = NFP_CPP_ISLAND_ID(target, NFP_CPP_ACTION_RW, 0, isl);
*area = nfp_cpp_area_alloc_with_name(cpp, dest, name, addr, size);
if (!*area) {
err = -EIO;
goto err_area;
}
err = nfp_cpp_area_acquire(*area);
if (err < 0)
goto err_acquire;
res = nfp_cpp_area_iomem(*area);
if (!res) {
err = -EIO;
goto err_map;
}
return res;
err_map:
nfp_cpp_area_release(*area);
err_acquire:
nfp_cpp_area_free(*area);
err_area:
return (u8 __iomem *)ERR_PTR(err);
}
static void
nfp_net_get_mac_addr_hwinfo(struct nfp_net *nn, struct nfp_cpp *cpp,
unsigned int id)
{
u8 mac_addr[ETH_ALEN];
const char *mac_str;
char name[32];
snprintf(name, sizeof(name), "eth%d.mac", id);
mac_str = nfp_hwinfo_lookup(cpp, name);
if (!mac_str) {
dev_warn(&nn->pdev->dev,
"Can't lookup MAC address. Generate\n");
eth_hw_addr_random(nn->netdev);
return;
}
if (sscanf(mac_str, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
&mac_addr[0], &mac_addr[1], &mac_addr[2],
&mac_addr[3], &mac_addr[4], &mac_addr[5]) != 6) {
dev_warn(&nn->pdev->dev,
"Can't parse MAC address (%s). Generate.\n", mac_str);
eth_hw_addr_random(nn->netdev);
return;
}
ether_addr_copy(nn->netdev->dev_addr, mac_addr);
ether_addr_copy(nn->netdev->perm_addr, mac_addr);
}
/**
* nfp_net_get_mac_addr() - Get the MAC address.
* @nn: NFP Network structure
* @pf: NFP PF device structure
* @id: NFP port id
*
* First try to get the MAC address from NSP ETH table. If that
* fails try HWInfo. As a last resort generate a random address.
*/
static void
nfp_net_get_mac_addr(struct nfp_net *nn, struct nfp_pf *pf, unsigned int id)
{
int i;
for (i = 0; pf->eth_tbl && i < pf->eth_tbl->count; i++)
if (pf->eth_tbl->ports[i].eth_index == id) {
const u8 *mac_addr = pf->eth_tbl->ports[i].mac_addr;
ether_addr_copy(nn->netdev->dev_addr, mac_addr);
ether_addr_copy(nn->netdev->perm_addr, mac_addr);
return;
}
nfp_net_get_mac_addr_hwinfo(nn, pf->cpp, id);
}
static unsigned int nfp_net_pf_get_num_ports(struct nfp_pf *pf)
{
char name[256];
u16 interface;
int pcie_pf;
int err = 0;
u64 val;
interface = nfp_cpp_interface(pf->cpp);
pcie_pf = NFP_CPP_INTERFACE_UNIT_of(interface);
snprintf(name, sizeof(name), "nfd_cfg_pf%d_num_ports", pcie_pf);
val = nfp_rtsym_read_le(pf->cpp, name, &err);
/* Default to one port */
if (err) {
if (err != -ENOENT)
nfp_err(pf->cpp, "Unable to read adapter port count\n");
val = 1;
}
return val;
}
static unsigned int
nfp_net_pf_total_qcs(struct nfp_pf *pf, void __iomem *ctrl_bar,
unsigned int stride, u32 start_off, u32 num_off)
{
unsigned int i, min_qc, max_qc;
min_qc = readl(ctrl_bar + start_off);
max_qc = min_qc;
for (i = 0; i < pf->num_ports; i++) {
/* To make our lives simpler only accept configuration where
* queues are allocated to PFs in order (queues of PFn all have
* indexes lower than PFn+1).
*/
if (max_qc > readl(ctrl_bar + start_off))
return 0;
max_qc = readl(ctrl_bar + start_off);
max_qc += readl(ctrl_bar + num_off) * stride;
ctrl_bar += NFP_PF_CSR_SLICE_SIZE;
}
return max_qc - min_qc;
}
static u8 __iomem *nfp_net_pf_map_ctrl_bar(struct nfp_pf *pf)
{
const struct nfp_rtsym *ctrl_sym;
u8 __iomem *ctrl_bar;
char pf_symbol[256];
u16 interface;
int pcie_pf;
interface = nfp_cpp_interface(pf->cpp);
pcie_pf = NFP_CPP_INTERFACE_UNIT_of(interface);
snprintf(pf_symbol, sizeof(pf_symbol), "_pf%d_net_bar0", pcie_pf);
ctrl_sym = nfp_rtsym_lookup(pf->cpp, pf_symbol);
if (!ctrl_sym) {
dev_err(&pf->pdev->dev,
"Failed to find PF BAR0 symbol %s\n", pf_symbol);
return NULL;
}
if (ctrl_sym->size < pf->num_ports * NFP_PF_CSR_SLICE_SIZE) {
dev_err(&pf->pdev->dev,
"PF BAR0 too small to contain %d ports\n",
pf->num_ports);
return NULL;
}
ctrl_bar = nfp_net_map_area(pf->cpp, "net.ctrl",
ctrl_sym->domain, ctrl_sym->target,
ctrl_sym->addr, ctrl_sym->size,
&pf->ctrl_area);
if (IS_ERR(ctrl_bar)) {
dev_err(&pf->pdev->dev, "Failed to map PF BAR0: %ld\n",
PTR_ERR(ctrl_bar));
return NULL;
}
return ctrl_bar;
}
static void nfp_net_pf_free_netdevs(struct nfp_pf *pf)
{
struct nfp_net *nn;
while (!list_empty(&pf->ports)) {
nn = list_first_entry(&pf->ports, struct nfp_net, port_list);
list_del(&nn->port_list);
nfp_net_netdev_free(nn);
}
}
static struct nfp_net *
nfp_net_pf_alloc_port_netdev(struct nfp_pf *pf, void __iomem *ctrl_bar,
void __iomem *tx_bar, void __iomem *rx_bar,
int stride, struct nfp_net_fw_version *fw_ver)
{
u32 n_tx_rings, n_rx_rings;
struct nfp_net *nn;
n_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS);
n_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS);
/* Allocate and initialise the netdev */
nn = nfp_net_netdev_alloc(pf->pdev, n_tx_rings, n_rx_rings);
if (IS_ERR(nn))
return nn;
nn->fw_ver = *fw_ver;
nn->ctrl_bar = ctrl_bar;
nn->tx_bar = tx_bar;
nn->rx_bar = rx_bar;
nn->is_vf = 0;
nn->stride_rx = stride;
nn->stride_tx = stride;
return nn;
}
static int
nfp_net_pf_init_port_netdev(struct nfp_pf *pf, struct nfp_net *nn,
unsigned int id)
{
int err;
/* Get MAC address */
nfp_net_get_mac_addr(nn, pf, id);
/* Get ME clock frequency from ctrl BAR
* XXX for now frequency is hardcoded until we figure out how
* to get the value from nfp-hwinfo into ctrl bar
*/
nn->me_freq_mhz = 1200;
err = nfp_net_netdev_init(nn->netdev);
if (err)
return err;
nfp_net_debugfs_port_add(nn, pf->ddir, id);
nfp_net_info(nn);
return 0;
}
static int
nfp_net_pf_alloc_netdevs(struct nfp_pf *pf, void __iomem *ctrl_bar,
void __iomem *tx_bar, void __iomem *rx_bar,
int stride, struct nfp_net_fw_version *fw_ver)
{
u32 prev_tx_base, prev_rx_base, tgt_tx_base, tgt_rx_base;
struct nfp_net *nn;
unsigned int i;
int err;
prev_tx_base = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
prev_rx_base = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
for (i = 0; i < pf->num_ports; i++) {
tgt_tx_base = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
tgt_rx_base = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
tx_bar += (tgt_tx_base - prev_tx_base) * NFP_QCP_QUEUE_ADDR_SZ;
rx_bar += (tgt_rx_base - prev_rx_base) * NFP_QCP_QUEUE_ADDR_SZ;
prev_tx_base = tgt_tx_base;
prev_rx_base = tgt_rx_base;
nn = nfp_net_pf_alloc_port_netdev(pf, ctrl_bar, tx_bar, rx_bar,
stride, fw_ver);
if (IS_ERR(nn)) {
err = PTR_ERR(nn);
goto err_free_prev;
}
list_add_tail(&nn->port_list, &pf->ports);
ctrl_bar += NFP_PF_CSR_SLICE_SIZE;
}
return 0;
err_free_prev:
nfp_net_pf_free_netdevs(pf);
return err;
}
static int
nfp_net_pf_spawn_netdevs(struct nfp_pf *pf,
void __iomem *ctrl_bar, void __iomem *tx_bar,
void __iomem *rx_bar, int stride,
struct nfp_net_fw_version *fw_ver)
{
unsigned int id, wanted_irqs, num_irqs, ports_left, irqs_left;
struct nfp_net *nn;
int err;
/* Allocate the netdevs and do basic init */
err = nfp_net_pf_alloc_netdevs(pf, ctrl_bar, tx_bar, rx_bar,
stride, fw_ver);
if (err)
return err;
/* Get MSI-X vectors */
wanted_irqs = 0;
list_for_each_entry(nn, &pf->ports, port_list)
wanted_irqs += NFP_NET_NON_Q_VECTORS + nn->num_r_vecs;
pf->irq_entries = kcalloc(wanted_irqs, sizeof(*pf->irq_entries),
GFP_KERNEL);
if (!pf->irq_entries) {
err = -ENOMEM;
goto err_nn_free;
}
num_irqs = nfp_net_irqs_alloc(pf->pdev, pf->irq_entries,
NFP_NET_MIN_PORT_IRQS * pf->num_ports,
wanted_irqs);
if (!num_irqs) {
nn_warn(nn, "Unable to allocate MSI-X Vectors. Exiting\n");
err = -ENOMEM;
goto err_vec_free;
}
/* Distribute IRQs to ports */
irqs_left = num_irqs;
ports_left = pf->num_ports;
list_for_each_entry(nn, &pf->ports, port_list) {
unsigned int n;
n = DIV_ROUND_UP(irqs_left, ports_left);
nfp_net_irqs_assign(nn, &pf->irq_entries[num_irqs - irqs_left],
n);
irqs_left -= n;
ports_left--;
}
/* Finish netdev init and register */
id = 0;
list_for_each_entry(nn, &pf->ports, port_list) {
err = nfp_net_pf_init_port_netdev(pf, nn, id);
if (err)
goto err_prev_deinit;
id++;
}
return 0;
err_prev_deinit:
list_for_each_entry_continue_reverse(nn, &pf->ports, port_list) {
nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
nfp_net_netdev_clean(nn->netdev);
}
nfp_net_irqs_disable(pf->pdev);
err_vec_free:
kfree(pf->irq_entries);
err_nn_free:
nfp_net_pf_free_netdevs(pf);
return err;
}
/*
* PCI device functions
*/
int nfp_net_pci_probe(struct nfp_pf *pf)
{
u8 __iomem *ctrl_bar, *tx_bar, *rx_bar;
u32 total_tx_qcs, total_rx_qcs;
struct nfp_net_fw_version fw_ver;
u32 tx_area_sz, rx_area_sz;
u32 start_q;
int stride;
int err;
/* Verify that the board has completed initialization */
if (!nfp_is_ready(pf->cpp)) {
nfp_err(pf->cpp, "NFP is not ready for NIC operation.\n");
return -EINVAL;
}
pf->num_ports = nfp_net_pf_get_num_ports(pf);
ctrl_bar = nfp_net_pf_map_ctrl_bar(pf);
if (!ctrl_bar)
return pf->fw_loaded ? -EINVAL : -EPROBE_DEFER;
nfp_net_get_fw_version(&fw_ver, ctrl_bar);
if (fw_ver.resv || fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
nfp_err(pf->cpp, "Unknown Firmware ABI %d.%d.%d.%d\n",
fw_ver.resv, fw_ver.class, fw_ver.major, fw_ver.minor);
err = -EINVAL;
goto err_ctrl_unmap;
}
/* Determine stride */
if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
stride = 2;
nfp_warn(pf->cpp, "OBSOLETE Firmware detected - VF isolation not available\n");
} else {
switch (fw_ver.major) {
case 1 ... 4:
stride = 4;
break;
default:
nfp_err(pf->cpp, "Unsupported Firmware ABI %d.%d.%d.%d\n",
fw_ver.resv, fw_ver.class,
fw_ver.major, fw_ver.minor);
err = -EINVAL;
goto err_ctrl_unmap;
}
}
/* Find how many QC structs need to be mapped */
total_tx_qcs = nfp_net_pf_total_qcs(pf, ctrl_bar, stride,
NFP_NET_CFG_START_TXQ,
NFP_NET_CFG_MAX_TXRINGS);
total_rx_qcs = nfp_net_pf_total_qcs(pf, ctrl_bar, stride,
NFP_NET_CFG_START_RXQ,
NFP_NET_CFG_MAX_RXRINGS);
if (!total_tx_qcs || !total_rx_qcs) {
nfp_err(pf->cpp, "Invalid PF QC configuration [%d,%d]\n",
total_tx_qcs, total_rx_qcs);
err = -EINVAL;
goto err_ctrl_unmap;
}
tx_area_sz = NFP_QCP_QUEUE_ADDR_SZ * total_tx_qcs;
rx_area_sz = NFP_QCP_QUEUE_ADDR_SZ * total_rx_qcs;
/* Map TX queues */
start_q = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
tx_bar = nfp_net_map_area(pf->cpp, "net.tx", 0, 0,
NFP_PCIE_QUEUE(start_q),
tx_area_sz, &pf->tx_area);
if (IS_ERR(tx_bar)) {
nfp_err(pf->cpp, "Failed to map TX area.\n");
err = PTR_ERR(tx_bar);
goto err_ctrl_unmap;
}
/* Map RX queues */
start_q = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
rx_bar = nfp_net_map_area(pf->cpp, "net.rx", 0, 0,
NFP_PCIE_QUEUE(start_q),
rx_area_sz, &pf->rx_area);
if (IS_ERR(rx_bar)) {
nfp_err(pf->cpp, "Failed to map RX area.\n");
err = PTR_ERR(rx_bar);
goto err_unmap_tx;
}
pf->ddir = nfp_net_debugfs_device_add(pf->pdev);
err = nfp_net_pf_spawn_netdevs(pf, ctrl_bar, tx_bar, rx_bar,
stride, &fw_ver);
if (err)
goto err_clean_ddir;
return 0;
err_clean_ddir:
nfp_net_debugfs_dir_clean(&pf->ddir);
nfp_cpp_area_release_free(pf->rx_area);
err_unmap_tx:
nfp_cpp_area_release_free(pf->tx_area);
err_ctrl_unmap:
nfp_cpp_area_release_free(pf->ctrl_area);
return err;
}
void nfp_net_pci_remove(struct nfp_pf *pf)
{
struct nfp_net *nn;
list_for_each_entry(nn, &pf->ports, port_list) {
nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
nfp_net_netdev_clean(nn->netdev);
}
nfp_net_pf_free_netdevs(pf);
nfp_net_debugfs_dir_clean(&pf->ddir);
nfp_net_irqs_disable(pf->pdev);
kfree(pf->irq_entries);
nfp_cpp_area_release_free(pf->rx_area);
nfp_cpp_area_release_free(pf->tx_area);
nfp_cpp_area_release_free(pf->ctrl_area);
}