--- /dev/null
+/*
+ * 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;
+}
--- /dev/null
+/*
+ * 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.h
+ * Authors: Jason McMullan <jason.mcmullan@netronome.com>
+ * Francois H. Theron <francois.theron@netronome.com>
+ */
+
+#ifndef NFP_NFFW_H
+#define NFP_NFFW_H
+
+/* Implemented in nfp_nffw.c */
+
+struct nfp_nffw_info;
+
+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);
+
+#endif /* NFP_NFFW_H */
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