Commit 4cb584e0 authored by Jakub Kicinski's avatar Jakub Kicinski Committed by David S. Miller

nfp: add CPP access core

Command Push Pull is the name of NFP's network on a chip.
PCIe PF can access the interconnect through a number of mappings
controlled via Base Access Registers.  BARs allow the PF to issue
pretty much any command or address any memory on the chip.

Add appropriate logic and a handful of helper for simple operations
like reading scalars from memories.
Signed-off-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2633beb9
obj-$(CONFIG_NFP) += nfp.o obj-$(CONFIG_NFP) += nfp.o
nfp-objs := \ nfp-objs := \
nfpcore/nfp6000_pcie.o \
nfpcore/nfp_cppcore.o \
nfpcore/nfp_cpplib.o \
nfpcore/nfp_target.o \
nfp_main.o \ nfp_main.o \
nfp_net_common.o \ nfp_net_common.o \
nfp_net_ethtool.o \ nfp_net_ethtool.o \
......
/*
* 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.
*/
#ifndef NFP6000_NFP6000_H
#define NFP6000_NFP6000_H
#include <linux/errno.h>
#include <linux/types.h>
/* CPP Target IDs */
#define NFP_CPP_TARGET_INVALID 0
#define NFP_CPP_TARGET_NBI 1
#define NFP_CPP_TARGET_QDR 2
#define NFP_CPP_TARGET_ILA 6
#define NFP_CPP_TARGET_MU 7
#define NFP_CPP_TARGET_PCIE 9
#define NFP_CPP_TARGET_ARM 10
#define NFP_CPP_TARGET_CRYPTO 12
#define NFP_CPP_TARGET_ISLAND_XPB 14 /* Shared with CAP */
#define NFP_CPP_TARGET_ISLAND_CAP 14 /* Shared with XPB */
#define NFP_CPP_TARGET_CT_XPB 14
#define NFP_CPP_TARGET_LOCAL_SCRATCH 15
#define NFP_CPP_TARGET_CLS NFP_CPP_TARGET_LOCAL_SCRATCH
#define NFP_ISL_EMEM0 24
#define NFP_MU_ADDR_ACCESS_TYPE_MASK 3ULL
#define NFP_MU_ADDR_ACCESS_TYPE_DIRECT 2ULL
#define PUSHPULL(_pull, _push) ((_pull) << 4 | (_push) << 0)
#define PUSH_WIDTH(_pushpull) pushpull_width((_pushpull) >> 0)
#define PULL_WIDTH(_pushpull) pushpull_width((_pushpull) >> 4)
static inline int pushpull_width(int pp)
{
pp &= 0xf;
if (pp == 0)
return -EINVAL;
return 2 << pp;
}
static inline int nfp_cppat_mu_locality_lsb(int mode, bool addr40)
{
switch (mode) {
case 0 ... 3:
return addr40 ? 38 : 30;
default:
return -EINVAL;
}
}
int nfp_target_pushpull(u32 cpp_id, u64 address);
int nfp_target_cpp(u32 cpp_island_id, u64 cpp_island_address,
u32 *cpp_target_id, u64 *cpp_target_address,
const u32 *imb_table);
#endif /* NFP6000_NFP6000_H */
/*
* 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_xpb.h
* Author: Jason McMullan <jason.mcmullan@netronome.com>
*/
#ifndef NFP6000_XPB_H
#define NFP6000_XPB_H
/* For use with NFP6000 Databook "XPB Addressing" section
*/
#define NFP_XPB_OVERLAY(island) (((island) & 0x3f) << 24)
#define NFP_XPB_ISLAND(island) (NFP_XPB_OVERLAY(island) + 0x60000)
#define NFP_XPB_ISLAND_of(offset) (((offset) >> 24) & 0x3F)
/* For use with NFP6000 Databook "XPB Island and Device IDs" chapter
*/
#define NFP_XPB_DEVICE(island, slave, device) \
(NFP_XPB_OVERLAY(island) | \
(((slave) & 3) << 22) | \
(((device) & 0x3f) << 16))
#endif /* NFP6000_XPB_H */
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/*
* 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.
*/
/*
* nfp6000_pcie.h
* Author: Jason McMullan <jason.mcmullan@netronome.com>
*/
#ifndef NFP6000_PCIE_H
#define NFP6000_PCIE_H
#include "nfp_cpp.h"
struct nfp_cpp *nfp_cpp_from_nfp6000_pcie(struct pci_dev *pdev);
#endif /* NFP6000_PCIE_H */
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/*
* 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_cpplib.c
* Library of functions to access the NFP's CPP bus
* Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
* Jason McMullan <jason.mcmullan@netronome.com>
* Rolf Neugebauer <rolf.neugebauer@netronome.com>
*/
#include <asm/unaligned.h>
#include <linux/bitfield.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include "nfp_cpp.h"
#include "nfp6000/nfp6000.h"
#include "nfp6000/nfp_xpb.h"
/* NFP6000 PL */
#define NFP_PL_DEVICE_ID 0x00000004
#define NFP_PL_DEVICE_ID_MASK GENMASK(7, 0)
#define NFP6000_ARM_GCSR_SOFTMODEL0 0x00400144
/**
* nfp_cpp_readl() - Read a u32 word from a CPP location
* @cpp: CPP device handle
* @cpp_id: CPP ID for operation
* @address: Address for operation
* @value: Pointer to read buffer
*
* Return: length of the io, or -ERRNO
*/
int nfp_cpp_readl(struct nfp_cpp *cpp, u32 cpp_id,
unsigned long long address, u32 *value)
{
u8 tmp[4];
int err;
err = nfp_cpp_read(cpp, cpp_id, address, tmp, sizeof(tmp));
*value = get_unaligned_le32(tmp);
return err;
}
/**
* nfp_cpp_writel() - Write a u32 word to a CPP location
* @cpp: CPP device handle
* @cpp_id: CPP ID for operation
* @address: Address for operation
* @value: Value to write
*
* Return: length of the io, or -ERRNO
*/
int nfp_cpp_writel(struct nfp_cpp *cpp, u32 cpp_id,
unsigned long long address, u32 value)
{
u8 tmp[4];
put_unaligned_le32(value, tmp);
return nfp_cpp_write(cpp, cpp_id, address, tmp, sizeof(tmp));
}
/**
* nfp_cpp_readq() - Read a u64 word from a CPP location
* @cpp: CPP device handle
* @cpp_id: CPP ID for operation
* @address: Address for operation
* @value: Pointer to read buffer
*
* Return: length of the io, or -ERRNO
*/
int nfp_cpp_readq(struct nfp_cpp *cpp, u32 cpp_id,
unsigned long long address, u64 *value)
{
u8 tmp[8];
int err;
err = nfp_cpp_read(cpp, cpp_id, address, tmp, sizeof(tmp));
*value = get_unaligned_le64(tmp);
return err;
}
/**
* nfp_cpp_writeq() - Write a u64 word to a CPP location
* @cpp: CPP device handle
* @cpp_id: CPP ID for operation
* @address: Address for operation
* @value: Value to write
*
* Return: length of the io, or -ERRNO
*/
int nfp_cpp_writeq(struct nfp_cpp *cpp, u32 cpp_id,
unsigned long long address, u64 value)
{
u8 tmp[8];
put_unaligned_le64(value, tmp);
return nfp_cpp_write(cpp, cpp_id, address, tmp, sizeof(tmp));
}
/* NOTE: This code should not use nfp_xpb_* functions,
* as those are model-specific
*/
int nfp_cpp_model_autodetect(struct nfp_cpp *cpp, u32 *model)
{
const u32 arm_id = NFP_CPP_ID(NFP_CPP_TARGET_ARM, 0, 0);
u32 reg;
int err;
err = nfp_cpp_readl(cpp, arm_id, NFP6000_ARM_GCSR_SOFTMODEL0, model);
if (err < 0)
return err;
/* The PL's PluDeviceID revision code is authoratative */
*model &= ~0xff;
err = nfp_xpb_readl(cpp, NFP_XPB_DEVICE(1, 1, 16) + NFP_PL_DEVICE_ID,
&reg);
if (err < 0)
return err;
*model |= (NFP_PL_DEVICE_ID_MASK & reg) - 0x10;
return 0;
}
static u8 nfp_bytemask(int width, u64 addr)
{
if (width == 8)
return 0xff;
else if (width == 4)
return 0x0f << (addr & 4);
else if (width == 2)
return 0x03 << (addr & 6);
else if (width == 1)
return 0x01 << (addr & 7);
else
return 0;
}
int nfp_cpp_explicit_read(struct nfp_cpp *cpp, u32 cpp_id,
u64 addr, void *buff, size_t len, int width_read)
{
struct nfp_cpp_explicit *expl;
char *tmp = buff;
int err, i, incr;
u8 byte_mask;
if (len & (width_read - 1))
return -EINVAL;
expl = nfp_cpp_explicit_acquire(cpp);
if (!expl)
return -EBUSY;
incr = min_t(int, 16 * width_read, 128);
incr = min_t(int, incr, len);
/* Translate a NFP_CPP_ACTION_RW to action 0 */
if (NFP_CPP_ID_ACTION_of(cpp_id) == NFP_CPP_ACTION_RW)
cpp_id = NFP_CPP_ID(NFP_CPP_ID_TARGET_of(cpp_id), 0,
NFP_CPP_ID_TOKEN_of(cpp_id));
byte_mask = nfp_bytemask(width_read, addr);
nfp_cpp_explicit_set_target(expl, cpp_id,
incr / width_read - 1, byte_mask);
nfp_cpp_explicit_set_posted(expl, 1, 0, NFP_SIGNAL_PUSH,
0, NFP_SIGNAL_NONE);
for (i = 0; i < len; i += incr, addr += incr, tmp += incr) {
if (i + incr > len) {
incr = len - i;
nfp_cpp_explicit_set_target(expl, cpp_id,
incr / width_read - 1,
0xff);
}
err = nfp_cpp_explicit_do(expl, addr);
if (err < 0)
goto exit_release;
err = nfp_cpp_explicit_get(expl, tmp, incr);
if (err < 0)
goto exit_release;
}
err = len;
exit_release:
nfp_cpp_explicit_release(expl);
return err;
}
int nfp_cpp_explicit_write(struct nfp_cpp *cpp, u32 cpp_id, u64 addr,
const void *buff, size_t len, int width_write)
{
struct nfp_cpp_explicit *expl;
const char *tmp = buff;
int err, i, incr;
u8 byte_mask;
if (len & (width_write - 1))
return -EINVAL;
expl = nfp_cpp_explicit_acquire(cpp);
if (!expl)
return -EBUSY;
incr = min_t(int, 16 * width_write, 128);
incr = min_t(int, incr, len);
/* Translate a NFP_CPP_ACTION_RW to action 1 */
if (NFP_CPP_ID_ACTION_of(cpp_id) == NFP_CPP_ACTION_RW)
cpp_id = NFP_CPP_ID(NFP_CPP_ID_TARGET_of(cpp_id), 1,
NFP_CPP_ID_TOKEN_of(cpp_id));
byte_mask = nfp_bytemask(width_write, addr);
nfp_cpp_explicit_set_target(expl, cpp_id,
incr / width_write - 1, byte_mask);
nfp_cpp_explicit_set_posted(expl, 1, 0, NFP_SIGNAL_PULL,
0, NFP_SIGNAL_NONE);
for (i = 0; i < len; i += incr, addr += incr, tmp += incr) {
if (i + incr > len) {
incr = len - i;
nfp_cpp_explicit_set_target(expl, cpp_id,
incr / width_write - 1,
0xff);
}
err = nfp_cpp_explicit_put(expl, tmp, incr);
if (err < 0)
goto exit_release;
err = nfp_cpp_explicit_do(expl, addr);
if (err < 0)
goto exit_release;
}
err = len;
exit_release:
nfp_cpp_explicit_release(expl);
return err;
}
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