1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2015-2017 Netronome Systems, Inc. */
6 * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
7 * Jason McMullan <jason.mcmullan@netronome.com>
8 * Espen Skoglund <espen.skoglund@netronome.com>
10 #include <linux/kernel.h>
11 #include <linux/slab.h>
17 #define NFP_MIP_SIGNATURE cpu_to_le32(0x0050494d) /* "MIP\0" */
18 #define NFP_MIP_VERSION cpu_to_le32(1)
19 #define NFP_MIP_MAX_OFFSET (256 * 1024)
41 /* Read memory and check if it could be a valid MIP */
43 nfp_mip_try_read(struct nfp_cpp *cpp, u32 cpp_id, u64 addr, struct nfp_mip *mip)
47 ret = nfp_cpp_read(cpp, cpp_id, addr, mip, sizeof(*mip));
48 if (ret != sizeof(*mip)) {
49 nfp_err(cpp, "Failed to read MIP data (%d, %zu)\n",
53 if (mip->signature != NFP_MIP_SIGNATURE) {
54 nfp_warn(cpp, "Incorrect MIP signature (0x%08x)\n",
55 le32_to_cpu(mip->signature));
58 if (mip->mip_version != NFP_MIP_VERSION) {
59 nfp_warn(cpp, "Unsupported MIP version (%d)\n",
60 le32_to_cpu(mip->mip_version));
67 /* Try to locate MIP using the resource table */
68 static int nfp_mip_read_resource(struct nfp_cpp *cpp, struct nfp_mip *mip)
70 struct nfp_nffw_info *nffw_info;
75 nffw_info = nfp_nffw_info_open(cpp);
76 if (IS_ERR(nffw_info))
77 return PTR_ERR(nffw_info);
79 err = nfp_nffw_info_mip_first(nffw_info, &cpp_id, &addr);
83 err = nfp_mip_try_read(cpp, cpp_id, addr, mip);
85 nfp_nffw_info_close(nffw_info);
90 * nfp_mip_open() - Get device MIP structure
91 * @cpp: NFP CPP Handle
93 * Copy MIP structure from NFP device and return it. The returned
94 * structure is handled internally by the library and should be
95 * freed by calling nfp_mip_close().
97 * Return: pointer to mip, NULL on failure.
99 const struct nfp_mip *nfp_mip_open(struct nfp_cpp *cpp)
104 mip = kmalloc(sizeof(*mip), GFP_KERNEL);
108 err = nfp_mip_read_resource(cpp, mip);
114 mip->name[sizeof(mip->name) - 1] = 0;
119 void nfp_mip_close(const struct nfp_mip *mip)
124 const char *nfp_mip_name(const struct nfp_mip *mip)
130 * nfp_mip_symtab() - Get the address and size of the MIP symbol table
132 * @addr: Location for NFP DDR address of MIP symbol table
133 * @size: Location for size of MIP symbol table
135 void nfp_mip_symtab(const struct nfp_mip *mip, u32 *addr, u32 *size)
137 *addr = le32_to_cpu(mip->symtab_addr);
138 *size = le32_to_cpu(mip->symtab_size);
142 * nfp_mip_strtab() - Get the address and size of the MIP symbol name table
144 * @addr: Location for NFP DDR address of MIP symbol name table
145 * @size: Location for size of MIP symbol name table
147 void nfp_mip_strtab(const struct nfp_mip *mip, u32 *addr, u32 *size)
149 *addr = le32_to_cpu(mip->strtab_addr);
150 *size = le32_to_cpu(mip->strtab_size);