// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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/* Copyright (C) 2015-2018 Netronome Systems, Inc. */
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/*
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* nfp_nffw.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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* Francois H. Theron <francois.theron@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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#include "nfp6000/nfp6000.h"
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/* Init-CSR owner IDs for firmware map to firmware IDs which start at 4.
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* Lower IDs are reserved for target and loader IDs.
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*/
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#define NFFW_FWID_EXT 3 /* For active MEs that we didn't load. */
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#define NFFW_FWID_BASE 4
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#define NFFW_FWID_ALL 255
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/**
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* NFFW_INFO_VERSION history:
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* 0: This was never actually used (before versioning), but it refers to
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* the previous struct which had FWINFO_CNT = MEINFO_CNT = 120 that later
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* changed to 200.
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* 1: First versioned struct, with
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* FWINFO_CNT = 120
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* MEINFO_CNT = 120
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* 2: FWINFO_CNT = 200
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* MEINFO_CNT = 200
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*/
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#define NFFW_INFO_VERSION_CURRENT 2
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/* Enough for all current chip families */
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#define NFFW_MEINFO_CNT_V1 120
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#define NFFW_FWINFO_CNT_V1 120
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#define NFFW_MEINFO_CNT_V2 200
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#define NFFW_FWINFO_CNT_V2 200
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/* Work in 32-bit words to make cross-platform endianness easier to handle */
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/** nfp.nffw meinfo **/
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struct nffw_meinfo {
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__le32 ctxmask__fwid__meid;
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};
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struct nffw_fwinfo {
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__le32 loaded__mu_da__mip_off_hi;
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__le32 mip_cppid; /* 0 means no MIP */
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__le32 mip_offset_lo;
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};
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struct nfp_nffw_info_v1 {
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struct nffw_meinfo meinfo[NFFW_MEINFO_CNT_V1];
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struct nffw_fwinfo fwinfo[NFFW_FWINFO_CNT_V1];
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};
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struct nfp_nffw_info_v2 {
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struct nffw_meinfo meinfo[NFFW_MEINFO_CNT_V2];
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struct nffw_fwinfo fwinfo[NFFW_FWINFO_CNT_V2];
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};
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/** Resource: nfp.nffw main **/
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struct nfp_nffw_info_data {
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__le32 flags[2];
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union {
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struct nfp_nffw_info_v1 v1;
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struct nfp_nffw_info_v2 v2;
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} info;
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};
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struct nfp_nffw_info {
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struct nfp_cpp *cpp;
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struct nfp_resource *res;
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struct nfp_nffw_info_data fwinf;
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};
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/* flg_info_version = flags[0]<27:16>
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* This is a small version counter intended only to detect if the current
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* implementation can read the current struct. Struct changes should be very
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* rare and as such a 12-bit counter should cover large spans of time. By the
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* time it wraps around, we don't expect to have 4096 versions of this struct
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* to be in use at the same time.
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*/
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static u32 nffw_res_info_version_get(const struct nfp_nffw_info_data *res)
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{
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return (le32_to_cpu(res->flags[0]) >> 16) & 0xfff;
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}
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/* flg_init = flags[0]<0> */
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static u32 nffw_res_flg_init_get(const struct nfp_nffw_info_data *res)
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{
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return (le32_to_cpu(res->flags[0]) >> 0) & 1;
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}
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/* loaded = loaded__mu_da__mip_off_hi<31:31> */
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static u32 nffw_fwinfo_loaded_get(const struct nffw_fwinfo *fi)
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{
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return (le32_to_cpu(fi->loaded__mu_da__mip_off_hi) >> 31) & 1;
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}
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/* mip_cppid = mip_cppid */
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static u32 nffw_fwinfo_mip_cppid_get(const struct nffw_fwinfo *fi)
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{
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return le32_to_cpu(fi->mip_cppid);
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}
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/* loaded = loaded__mu_da__mip_off_hi<8:8> */
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static u32 nffw_fwinfo_mip_mu_da_get(const struct nffw_fwinfo *fi)
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{
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return (le32_to_cpu(fi->loaded__mu_da__mip_off_hi) >> 8) & 1;
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}
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/* mip_offset = (loaded__mu_da__mip_off_hi<7:0> << 8) | mip_offset_lo */
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static u64 nffw_fwinfo_mip_offset_get(const struct nffw_fwinfo *fi)
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{
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u64 mip_off_hi = le32_to_cpu(fi->loaded__mu_da__mip_off_hi);
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return (mip_off_hi & 0xFF) << 32 | le32_to_cpu(fi->mip_offset_lo);
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}
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static unsigned int
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nffw_res_fwinfos(struct nfp_nffw_info_data *fwinf, struct nffw_fwinfo **arr)
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{
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/* For the this code, version 0 is most likely to be
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* version 1 in this case. Since the kernel driver
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* does not take responsibility for initialising the
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* nfp.nffw resource, any previous code (CA firmware or
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* userspace) that left the version 0 and did set
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* the init flag is going to be version 1.
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*/
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switch (nffw_res_info_version_get(fwinf)) {
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case 0:
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case 1:
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*arr = &fwinf->info.v1.fwinfo[0];
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return NFFW_FWINFO_CNT_V1;
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case 2:
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*arr = &fwinf->info.v2.fwinfo[0];
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return NFFW_FWINFO_CNT_V2;
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default:
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*arr = NULL;
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return 0;
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}
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}
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/**
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* nfp_nffw_info_open() - Acquire the lock on the NFFW table
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* @cpp: NFP CPP handle
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*
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* Return: pointer to nfp_nffw_info object or ERR_PTR()
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*/
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struct nfp_nffw_info *nfp_nffw_info_open(struct nfp_cpp *cpp)
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{
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struct nfp_nffw_info_data *fwinf;
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struct nfp_nffw_info *state;
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u32 info_ver;
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int err;
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state = kzalloc(sizeof(*state), GFP_KERNEL);
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if (!state)
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return ERR_PTR(-ENOMEM);
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state->res = nfp_resource_acquire(cpp, NFP_RESOURCE_NFP_NFFW);
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if (IS_ERR(state->res))
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goto err_free;
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fwinf = &state->fwinf;
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if (sizeof(*fwinf) > nfp_resource_size(state->res))
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goto err_release;
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err = nfp_cpp_read(cpp, nfp_resource_cpp_id(state->res),
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nfp_resource_address(state->res),
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fwinf, sizeof(*fwinf));
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if (err < (int)sizeof(*fwinf))
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goto err_release;
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if (!nffw_res_flg_init_get(fwinf))
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goto err_release;
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info_ver = nffw_res_info_version_get(fwinf);
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if (info_ver > NFFW_INFO_VERSION_CURRENT)
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goto err_release;
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state->cpp = cpp;
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return state;
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err_release:
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nfp_resource_release(state->res);
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err_free:
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kfree(state);
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return ERR_PTR(-EIO);
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}
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/**
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* nfp_nffw_info_close() - Release the lock on the NFFW table and free state
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* @state: NFP FW info state
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*/
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void nfp_nffw_info_close(struct nfp_nffw_info *state)
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{
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nfp_resource_release(state->res);
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kfree(state);
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}
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/**
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* nfp_nffw_info_fwid_first() - Return the first firmware ID in the NFFW
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* @state: NFP FW info state
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*
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* Return: First NFFW firmware info, NULL on failure
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*/
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static struct nffw_fwinfo *nfp_nffw_info_fwid_first(struct nfp_nffw_info *state)
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{
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struct nffw_fwinfo *fwinfo;
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unsigned int cnt, i;
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cnt = nffw_res_fwinfos(&state->fwinf, &fwinfo);
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if (!cnt)
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return NULL;
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for (i = 0; i < cnt; i++)
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if (nffw_fwinfo_loaded_get(&fwinfo[i]))
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return &fwinfo[i];
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return NULL;
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}
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/**
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* nfp_nffw_info_mip_first() - Retrieve the location of the first FW's MIP
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* @state: NFP FW info state
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* @cpp_id: Pointer to the CPP ID of the MIP
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* @off: Pointer to the CPP Address of the MIP
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*
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* Return: 0, or -ERRNO
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*/
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int nfp_nffw_info_mip_first(struct nfp_nffw_info *state, u32 *cpp_id, u64 *off)
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{
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struct nffw_fwinfo *fwinfo;
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fwinfo = nfp_nffw_info_fwid_first(state);
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if (!fwinfo)
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return -EINVAL;
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*cpp_id = nffw_fwinfo_mip_cppid_get(fwinfo);
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*off = nffw_fwinfo_mip_offset_get(fwinfo);
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if (nffw_fwinfo_mip_mu_da_get(fwinfo)) {
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int locality_off = nfp_cpp_mu_locality_lsb(state->cpp);
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*off &= ~(NFP_MU_ADDR_ACCESS_TYPE_MASK << locality_off);
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*off |= NFP_MU_ADDR_ACCESS_TYPE_DIRECT << locality_off;
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}
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return 0;
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}
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