nfp: add MIP reading support
MIP is a vector of information which linker can optionally include in application firmware. It will be used to retrieve the location of symbol tables. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -5,6 +5,7 @@ nfp-objs := \
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nfpcore/nfp_cppcore.o \
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nfpcore/nfp_cpplib.o \
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nfpcore/nfp_hwinfo.o \
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nfpcore/nfp_mip.o \
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nfpcore/nfp_nffw.o \
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nfpcore/nfp_resource.o \
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nfpcore/nfp_target.o \
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174
drivers/net/ethernet/netronome/nfp/nfpcore/nfp_mip.c
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174
drivers/net/ethernet/netronome/nfp/nfpcore/nfp_mip.c
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@ -0,0 +1,174 @@
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/*
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* Copyright (C) 2015-2017 Netronome Systems, Inc.
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*
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* This software is dual licensed under the GNU General License Version 2,
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* June 1991 as shown in the file COPYING in the top-level directory of this
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* source tree or the BSD 2-Clause License provided below. You have the
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* option to license this software under the complete terms of either license.
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*
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* The BSD 2-Clause License:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/*
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* nfp_mip.c
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* Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
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* Jason McMullan <jason.mcmullan@netronome.com>
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* Espen Skoglund <espen.skoglund@netronome.com>
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include "nfp.h"
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#include "nfp_cpp.h"
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#include "nfp_nffw.h"
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#define NFP_MIP_SIGNATURE cpu_to_le32(0x0050494d) /* "MIP\0" */
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#define NFP_MIP_VERSION cpu_to_le32(1)
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#define NFP_MIP_MAX_OFFSET (256 * 1024)
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struct nfp_mip {
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__le32 signature;
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__le32 mip_version;
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__le32 mip_size;
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__le32 first_entry;
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__le32 version;
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__le32 buildnum;
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__le32 buildtime;
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__le32 loadtime;
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__le32 symtab_addr;
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__le32 symtab_size;
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__le32 strtab_addr;
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__le32 strtab_size;
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char name[16];
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char toolchain[32];
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};
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/* Read memory and check if it could be a valid MIP */
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static int
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nfp_mip_try_read(struct nfp_cpp *cpp, u32 cpp_id, u64 addr, struct nfp_mip *mip)
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{
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int ret;
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ret = nfp_cpp_read(cpp, cpp_id, addr, mip, sizeof(*mip));
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if (ret != sizeof(*mip)) {
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nfp_err(cpp, "Failed to read MIP data (%d, %zu)\n",
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ret, sizeof(*mip));
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return -EIO;
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}
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if (mip->signature != NFP_MIP_SIGNATURE) {
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nfp_warn(cpp, "Incorrect MIP signature (0x%08x)\n",
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le32_to_cpu(mip->signature));
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return -EINVAL;
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}
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if (mip->mip_version != NFP_MIP_VERSION) {
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nfp_warn(cpp, "Unsupported MIP version (%d)\n",
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le32_to_cpu(mip->mip_version));
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return -EINVAL;
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}
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return 0;
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}
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/* Try to locate MIP using the resource table */
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static int nfp_mip_read_resource(struct nfp_cpp *cpp, struct nfp_mip *mip)
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{
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struct nfp_nffw_info *nffw_info;
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u32 cpp_id;
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u64 addr;
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int err;
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nffw_info = nfp_nffw_info_open(cpp);
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if (IS_ERR(nffw_info))
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return PTR_ERR(nffw_info);
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err = nfp_nffw_info_mip_first(nffw_info, &cpp_id, &addr);
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if (err)
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goto exit_close_nffw;
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err = nfp_mip_try_read(cpp, cpp_id, addr, mip);
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exit_close_nffw:
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nfp_nffw_info_close(nffw_info);
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return err;
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}
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/**
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* nfp_mip_open() - Get device MIP structure
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* @cpp: NFP CPP Handle
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*
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* Copy MIP structure from NFP device and return it. The returned
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* structure is handled internally by the library and should be
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* freed by calling nfp_mip_close().
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*
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* Return: pointer to mip, NULL on failure.
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*/
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const struct nfp_mip *nfp_mip_open(struct nfp_cpp *cpp)
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{
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struct nfp_mip *mip;
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int err;
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mip = kmalloc(sizeof(*mip), GFP_KERNEL);
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if (!mip)
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return NULL;
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err = nfp_mip_read_resource(cpp, mip);
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if (err) {
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kfree(mip);
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return NULL;
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}
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return mip;
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}
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void nfp_mip_close(const struct nfp_mip *mip)
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{
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kfree(mip);
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}
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/**
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* nfp_mip_symtab() - Get the address and size of the MIP symbol table
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* @mip: MIP handle
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* @addr: Location for NFP DDR address of MIP symbol table
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* @size: Location for size of MIP symbol table
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*/
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void nfp_mip_symtab(const struct nfp_mip *mip, u32 *addr, u32 *size)
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{
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*addr = le32_to_cpu(mip->symtab_addr);
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*size = le32_to_cpu(mip->symtab_size);
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}
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/**
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* nfp_mip_strtab() - Get the address and size of the MIP symbol name table
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* @mip: MIP handle
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* @addr: Location for NFP DDR address of MIP symbol name table
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* @size: Location for size of MIP symbol name table
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*/
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void nfp_mip_strtab(const struct nfp_mip *mip, u32 *addr, u32 *size)
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{
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*addr = le32_to_cpu(mip->strtab_addr);
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*size = le32_to_cpu(mip->strtab_size);
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}
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@ -48,4 +48,14 @@ struct nfp_nffw_info *nfp_nffw_info_open(struct nfp_cpp *cpp);
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void nfp_nffw_info_close(struct nfp_nffw_info *state);
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int nfp_nffw_info_mip_first(struct nfp_nffw_info *state, u32 *cpp_id, u64 *off);
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/* Implemented in nfp_mip.c */
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struct nfp_mip;
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const struct nfp_mip *nfp_mip_open(struct nfp_cpp *cpp);
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void nfp_mip_close(const struct nfp_mip *mip);
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void nfp_mip_symtab(const struct nfp_mip *mip, u32 *addr, u32 *size);
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void nfp_mip_strtab(const struct nfp_mip *mip, u32 *addr, u32 *size);
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#endif /* NFP_NFFW_H */
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