nfp: add MIP reading support (ab78c1d2) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/net/ethernet/netronome/nfp/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -5,6 +5,7 @@ nfp-objs := \
		nfpcore/nfp_cppcore.o \
		nfpcore/nfp_cpplib.o \
		nfpcore/nfp_hwinfo.o \
		nfpcore/nfp_mip.o \
		nfpcore/nfp_nffw.o \
		nfpcore/nfp_resource.o \
		nfpcore/nfp_target.o \

drivers/net/ethernet/netronome/nfp/nfpcore/nfp_mip.c

0 → 100644

+174 −0

Original line number	Diff line number	Diff line
		/*
		* 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_mip.c
		* Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
		* Jason McMullan <jason.mcmullan@netronome.com>
		* Espen Skoglund <espen.skoglund@netronome.com>
		*/
		#include <linux/kernel.h>
		#include <linux/slab.h>

		#include "nfp.h"
		#include "nfp_cpp.h"
		#include "nfp_nffw.h"

		#define NFP_MIP_SIGNATURE cpu_to_le32(0x0050494d) /* "MIP\0" */
		#define NFP_MIP_VERSION cpu_to_le32(1)
		#define NFP_MIP_MAX_OFFSET (256 * 1024)

		struct nfp_mip {
		__le32 signature;
		__le32 mip_version;
		__le32 mip_size;
		__le32 first_entry;

		__le32 version;
		__le32 buildnum;
		__le32 buildtime;
		__le32 loadtime;

		__le32 symtab_addr;
		__le32 symtab_size;
		__le32 strtab_addr;
		__le32 strtab_size;

		char name[16];
		char toolchain[32];
		};

		/* Read memory and check if it could be a valid MIP */
		static int
		nfp_mip_try_read(struct nfp_cpp cpp, u32 cpp_id, u64 addr, struct nfp_mip mip)
		{
		int ret;

		ret = nfp_cpp_read(cpp, cpp_id, addr, mip, sizeof(*mip));
		if (ret != sizeof(*mip)) {
		nfp_err(cpp, "Failed to read MIP data (%d, %zu)\n",
		ret, sizeof(*mip));
		return -EIO;
		}
		if (mip->signature != NFP_MIP_SIGNATURE) {
		nfp_warn(cpp, "Incorrect MIP signature (0x%08x)\n",
		le32_to_cpu(mip->signature));
		return -EINVAL;
		}
		if (mip->mip_version != NFP_MIP_VERSION) {
		nfp_warn(cpp, "Unsupported MIP version (%d)\n",
		le32_to_cpu(mip->mip_version));
		return -EINVAL;
		}

		return 0;
		}

		/* Try to locate MIP using the resource table */
		static int nfp_mip_read_resource(struct nfp_cpp cpp, struct nfp_mip mip)
		{
		struct nfp_nffw_info *nffw_info;
		u32 cpp_id;
		u64 addr;
		int err;

		nffw_info = nfp_nffw_info_open(cpp);
		if (IS_ERR(nffw_info))
		return PTR_ERR(nffw_info);

		err = nfp_nffw_info_mip_first(nffw_info, &cpp_id, &addr);
		if (err)
		goto exit_close_nffw;

		err = nfp_mip_try_read(cpp, cpp_id, addr, mip);
		exit_close_nffw:
		nfp_nffw_info_close(nffw_info);
		return err;
		}

		/**
		* nfp_mip_open() - Get device MIP structure
		* @cpp: NFP CPP Handle
		*
		* Copy MIP structure from NFP device and return it. The returned
		* structure is handled internally by the library and should be
		* freed by calling nfp_mip_close().
		*
		* Return: pointer to mip, NULL on failure.
		*/
		const struct nfp_mip nfp_mip_open(struct nfp_cpp cpp)
		{
		struct nfp_mip *mip;
		int err;

		mip = kmalloc(sizeof(*mip), GFP_KERNEL);
		if (!mip)
		return NULL;

		err = nfp_mip_read_resource(cpp, mip);
		if (err) {
		kfree(mip);
		return NULL;
		}

		return mip;
		}

		void nfp_mip_close(const struct nfp_mip *mip)
		{
		kfree(mip);
		}

		/**
		* nfp_mip_symtab() - Get the address and size of the MIP symbol table
		* @mip: MIP handle
		* @addr: Location for NFP DDR address of MIP symbol table
		* @size: Location for size of MIP symbol table
		*/
		void nfp_mip_symtab(const struct nfp_mip mip, u32 addr, u32 *size)
		{
		*addr = le32_to_cpu(mip->symtab_addr);
		*size = le32_to_cpu(mip->symtab_size);
		}

		/**
		* nfp_mip_strtab() - Get the address and size of the MIP symbol name table
		* @mip: MIP handle
		* @addr: Location for NFP DDR address of MIP symbol name table
		* @size: Location for size of MIP symbol name table
		*/
		void nfp_mip_strtab(const struct nfp_mip mip, u32 addr, u32 *size)
		{
		*addr = le32_to_cpu(mip->strtab_addr);
		*size = le32_to_cpu(mip->strtab_size);
		}

drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nffw.h

+10 −0

Original line number	Diff line number	Diff line
		@@ -48,4 +48,14 @@ struct nfp_nffw_info nfp_nffw_info_open(struct nfp_cpp cpp);
		void nfp_nffw_info_close(struct nfp_nffw_info *state);
		int nfp_nffw_info_mip_first(struct nfp_nffw_info state, u32 cpp_id, u64 *off);

		/* Implemented in nfp_mip.c */

		struct nfp_mip;

		const struct nfp_mip nfp_mip_open(struct nfp_cpp cpp);
		void nfp_mip_close(const struct nfp_mip *mip);

		void nfp_mip_symtab(const struct nfp_mip mip, u32 addr, u32 *size);
		void nfp_mip_strtab(const struct nfp_mip mip, u32 addr, u32 *size);

		#endif /* NFP_NFFW_H */