Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) /* Copyright (C) 2015-2017 Netronome Systems, Inc. */ /* * 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; } mip->name[sizeof(mip->name) - 1] = 0; return mip; } void nfp_mip_close(const struct nfp_mip *mip) { kfree(mip); } const char *nfp_mip_name(const struct nfp_mip *mip) { return mip->name; } /** * 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); } |