diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nffw.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nffw.c | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nffw.c b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nffw.c new file mode 100644 index 000000000000..cd34097b79f1 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nffw.c @@ -0,0 +1,323 @@ +/* + * 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_nffw.c + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Francois H. Theron <francois.theron@netronome.com> + */ + +#include <linux/kernel.h> +#include <linux/slab.h> + +#include "nfp.h" +#include "nfp_cpp.h" +#include "nfp_nffw.h" +#include "nfp6000/nfp6000.h" + +/* Init-CSR owner IDs for firmware map to firmware IDs which start at 4. + * Lower IDs are reserved for target and loader IDs. + */ +#define NFFW_FWID_EXT 3 /* For active MEs that we didn't load. */ +#define NFFW_FWID_BASE 4 + +#define NFFW_FWID_ALL 255 + +/** + * NFFW_INFO_VERSION history: + * 0: This was never actually used (before versioning), but it refers to + * the previous struct which had FWINFO_CNT = MEINFO_CNT = 120 that later + * changed to 200. + * 1: First versioned struct, with + * FWINFO_CNT = 120 + * MEINFO_CNT = 120 + * 2: FWINFO_CNT = 200 + * MEINFO_CNT = 200 + */ +#define NFFW_INFO_VERSION_CURRENT 2 + +/* Enough for all current chip families */ +#define NFFW_MEINFO_CNT_V1 120 +#define NFFW_FWINFO_CNT_V1 120 +#define NFFW_MEINFO_CNT_V2 200 +#define NFFW_FWINFO_CNT_V2 200 + +/* Work in 32-bit words to make cross-platform endianness easier to handle */ + +/** nfp.nffw meinfo **/ +struct nffw_meinfo { + __le32 ctxmask__fwid__meid; +}; + +struct nffw_fwinfo { + __le32 loaded__mu_da__mip_off_hi; + __le32 mip_cppid; /* 0 means no MIP */ + __le32 mip_offset_lo; +}; + +struct nfp_nffw_info_v1 { + struct nffw_meinfo meinfo[NFFW_MEINFO_CNT_V1]; + struct nffw_fwinfo fwinfo[NFFW_FWINFO_CNT_V1]; +}; + +struct nfp_nffw_info_v2 { + struct nffw_meinfo meinfo[NFFW_MEINFO_CNT_V2]; + struct nffw_fwinfo fwinfo[NFFW_FWINFO_CNT_V2]; +}; + +/** Resource: nfp.nffw main **/ +struct nfp_nffw_info_data { + __le32 flags[2]; + union { + struct nfp_nffw_info_v1 v1; + struct nfp_nffw_info_v2 v2; + } info; +}; + +struct nfp_nffw_info { + struct nfp_cpp *cpp; + struct nfp_resource *res; + + struct nfp_nffw_info_data fwinf; +}; + +/* flg_info_version = flags[0]<27:16> + * This is a small version counter intended only to detect if the current + * implementation can read the current struct. Struct changes should be very + * rare and as such a 12-bit counter should cover large spans of time. By the + * time it wraps around, we don't expect to have 4096 versions of this struct + * to be in use at the same time. + */ +static u32 nffw_res_info_version_get(const struct nfp_nffw_info_data *res) +{ + return (le32_to_cpu(res->flags[0]) >> 16) & 0xfff; +} + +/* flg_init = flags[0]<0> */ +static u32 nffw_res_flg_init_get(const struct nfp_nffw_info_data *res) +{ + return (le32_to_cpu(res->flags[0]) >> 0) & 1; +} + +/* loaded = loaded__mu_da__mip_off_hi<31:31> */ +static u32 nffw_fwinfo_loaded_get(const struct nffw_fwinfo *fi) +{ + return (le32_to_cpu(fi->loaded__mu_da__mip_off_hi) >> 31) & 1; +} + +/* mip_cppid = mip_cppid */ +static u32 nffw_fwinfo_mip_cppid_get(const struct nffw_fwinfo *fi) +{ + return le32_to_cpu(fi->mip_cppid); +} + +/* loaded = loaded__mu_da__mip_off_hi<8:8> */ +static u32 nffw_fwinfo_mip_mu_da_get(const struct nffw_fwinfo *fi) +{ + return (le32_to_cpu(fi->loaded__mu_da__mip_off_hi) >> 8) & 1; +} + +/* mip_offset = (loaded__mu_da__mip_off_hi<7:0> << 8) | mip_offset_lo */ +static u64 nffw_fwinfo_mip_offset_get(const struct nffw_fwinfo *fi) +{ + u64 mip_off_hi = le32_to_cpu(fi->loaded__mu_da__mip_off_hi); + + return (mip_off_hi & 0xFF) << 32 | le32_to_cpu(fi->mip_offset_lo); +} + +#define NFP_IMB_TGTADDRESSMODECFG_MODE_of(_x) (((_x) >> 13) & 0x7) +#define NFP_IMB_TGTADDRESSMODECFG_ADDRMODE BIT(12) +#define NFP_IMB_TGTADDRESSMODECFG_ADDRMODE_32_BIT 0 +#define NFP_IMB_TGTADDRESSMODECFG_ADDRMODE_40_BIT BIT(12) + +static int nfp_mip_mu_locality_lsb(struct nfp_cpp *cpp) +{ + unsigned int mode, addr40; + u32 xpbaddr, imbcppat; + int err; + + /* Hardcoded XPB IMB Base, island 0 */ + xpbaddr = 0x000a0000 + NFP_CPP_TARGET_MU * 4; + err = nfp_xpb_readl(cpp, xpbaddr, &imbcppat); + if (err < 0) + return err; + + mode = NFP_IMB_TGTADDRESSMODECFG_MODE_of(imbcppat); + addr40 = !!(imbcppat & NFP_IMB_TGTADDRESSMODECFG_ADDRMODE); + + return nfp_cppat_mu_locality_lsb(mode, addr40); +} + +static unsigned int +nffw_res_fwinfos(struct nfp_nffw_info_data *fwinf, struct nffw_fwinfo **arr) +{ + /* For the this code, version 0 is most likely to be + * version 1 in this case. Since the kernel driver + * does not take responsibility for initialising the + * nfp.nffw resource, any previous code (CA firmware or + * userspace) that left the version 0 and did set + * the init flag is going to be version 1. + */ + switch (nffw_res_info_version_get(fwinf)) { + case 0: + case 1: + *arr = &fwinf->info.v1.fwinfo[0]; + return NFFW_FWINFO_CNT_V1; + case 2: + *arr = &fwinf->info.v2.fwinfo[0]; + return NFFW_FWINFO_CNT_V2; + default: + *arr = NULL; + return 0; + } +} + +/** + * nfp_nffw_info_open() - Acquire the lock on the NFFW table + * @cpp: NFP CPP handle + * + * Return: 0, or -ERRNO + */ +struct nfp_nffw_info *nfp_nffw_info_open(struct nfp_cpp *cpp) +{ + struct nfp_nffw_info_data *fwinf; + struct nfp_nffw_info *state; + u32 info_ver; + int err; + + state = kzalloc(sizeof(*state), GFP_KERNEL); + if (!state) + return ERR_PTR(-ENOMEM); + + state->res = nfp_resource_acquire(cpp, NFP_RESOURCE_NFP_NFFW); + if (IS_ERR(state->res)) + goto err_free; + + fwinf = &state->fwinf; + + if (sizeof(*fwinf) > nfp_resource_size(state->res)) + goto err_release; + + err = nfp_cpp_read(cpp, nfp_resource_cpp_id(state->res), + nfp_resource_address(state->res), + fwinf, sizeof(*fwinf)); + if (err < sizeof(*fwinf)) + goto err_release; + + if (!nffw_res_flg_init_get(fwinf)) + goto err_release; + + info_ver = nffw_res_info_version_get(fwinf); + if (info_ver > NFFW_INFO_VERSION_CURRENT) + goto err_release; + + state->cpp = cpp; + return state; + +err_release: + nfp_resource_release(state->res); +err_free: + kfree(state); + return ERR_PTR(-EIO); +} + +/** + * nfp_nffw_info_release() - Release the lock on the NFFW table + * @state: NFP FW info state + * + * Return: 0, or -ERRNO + */ +void nfp_nffw_info_close(struct nfp_nffw_info *state) +{ + nfp_resource_release(state->res); + kfree(state); +} + +/** + * nfp_nffw_info_fwid_first() - Return the first firmware ID in the NFFW + * @state: NFP FW info state + * + * Return: First NFFW firmware info, NULL on failure + */ +static struct nffw_fwinfo *nfp_nffw_info_fwid_first(struct nfp_nffw_info *state) +{ + struct nffw_fwinfo *fwinfo; + unsigned int cnt, i; + + cnt = nffw_res_fwinfos(&state->fwinf, &fwinfo); + if (!cnt) + return NULL; + + for (i = 0; i < cnt; i++) + if (nffw_fwinfo_loaded_get(&fwinfo[i])) + return &fwinfo[i]; + + return NULL; +} + +/** + * nfp_nffw_info_mip_first() - Retrieve the location of the first FW's MIP + * @state: NFP FW info state + * @cpp_id: Pointer to the CPP ID of the MIP + * @off: Pointer to the CPP Address of the MIP + * + * Return: 0, or -ERRNO + */ +int nfp_nffw_info_mip_first(struct nfp_nffw_info *state, u32 *cpp_id, u64 *off) +{ + struct nffw_fwinfo *fwinfo; + + fwinfo = nfp_nffw_info_fwid_first(state); + if (!fwinfo) + return -EINVAL; + + *cpp_id = nffw_fwinfo_mip_cppid_get(fwinfo); + *off = nffw_fwinfo_mip_offset_get(fwinfo); + + if (nffw_fwinfo_mip_mu_da_get(fwinfo)) { + int locality_off; + + if (NFP_CPP_ID_TARGET_of(*cpp_id) != NFP_CPP_TARGET_MU) + return 0; + + locality_off = nfp_mip_mu_locality_lsb(state->cpp); + if (locality_off < 0) + return locality_off; + + *off &= ~(NFP_MU_ADDR_ACCESS_TYPE_MASK << locality_off); + *off |= NFP_MU_ADDR_ACCESS_TYPE_DIRECT << locality_off; + } + + return 0; +} |