/* * csr1212.h -- IEEE 1212 Control and Status Register support for Linux * * Copyright (C) 2003 Francois Retief <fgretief@sun.ac.za> * Steve Kinneberg <kinnebergsteve@acmsystems.com> * * 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. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef __CSR1212_H__ #define __CSR1212_H__ #include <linux/types.h> #include <linux/slab.h> #include <asm/atomic.h> #define CSR1212_MALLOC(size) kmalloc((size), GFP_KERNEL) #define CSR1212_FREE(ptr) kfree(ptr) #define CSR1212_SUCCESS (0) /* CSR 1212 key types */ #define CSR1212_KV_TYPE_IMMEDIATE 0 #define CSR1212_KV_TYPE_CSR_OFFSET 1 #define CSR1212_KV_TYPE_LEAF 2 #define CSR1212_KV_TYPE_DIRECTORY 3 /* CSR 1212 key ids */ #define CSR1212_KV_ID_DESCRIPTOR 0x01 #define CSR1212_KV_ID_BUS_DEPENDENT_INFO 0x02 #define CSR1212_KV_ID_VENDOR 0x03 #define CSR1212_KV_ID_HARDWARE_VERSION 0x04 #define CSR1212_KV_ID_MODULE 0x07 #define CSR1212_KV_ID_NODE_CAPABILITIES 0x0C #define CSR1212_KV_ID_EUI_64 0x0D #define CSR1212_KV_ID_UNIT 0x11 #define CSR1212_KV_ID_SPECIFIER_ID 0x12 #define CSR1212_KV_ID_VERSION 0x13 #define CSR1212_KV_ID_DEPENDENT_INFO 0x14 #define CSR1212_KV_ID_UNIT_LOCATION 0x15 #define CSR1212_KV_ID_MODEL 0x17 #define CSR1212_KV_ID_INSTANCE 0x18 #define CSR1212_KV_ID_KEYWORD 0x19 #define CSR1212_KV_ID_FEATURE 0x1A #define CSR1212_KV_ID_EXTENDED_ROM 0x1B #define CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID 0x1C #define CSR1212_KV_ID_EXTENDED_KEY 0x1D #define CSR1212_KV_ID_EXTENDED_DATA 0x1E #define CSR1212_KV_ID_MODIFIABLE_DESCRIPTOR 0x1F #define CSR1212_KV_ID_DIRECTORY_ID 0x20 #define CSR1212_KV_ID_REVISION 0x21 /* IEEE 1212 Address space map */ #define CSR1212_ALL_SPACE_BASE (0x000000000000ULL) #define CSR1212_ALL_SPACE_SIZE (1ULL << 48) #define CSR1212_ALL_SPACE_END (CSR1212_ALL_SPACE_BASE + CSR1212_ALL_SPACE_SIZE) #define CSR1212_MEMORY_SPACE_BASE (0x000000000000ULL) #define CSR1212_MEMORY_SPACE_SIZE ((256ULL * (1ULL << 40)) - (512ULL * (1ULL << 20))) #define CSR1212_MEMORY_SPACE_END (CSR1212_MEMORY_SPACE_BASE + CSR1212_MEMORY_SPACE_SIZE) #define CSR1212_PRIVATE_SPACE_BASE (0xffffe0000000ULL) #define CSR1212_PRIVATE_SPACE_SIZE (256ULL * (1ULL << 20)) #define CSR1212_PRIVATE_SPACE_END (CSR1212_PRIVATE_SPACE_BASE + CSR1212_PRIVATE_SPACE_SIZE) #define CSR1212_REGISTER_SPACE_BASE (0xfffff0000000ULL) #define CSR1212_REGISTER_SPACE_SIZE (256ULL * (1ULL << 20)) #define CSR1212_REGISTER_SPACE_END (CSR1212_REGISTER_SPACE_BASE + CSR1212_REGISTER_SPACE_SIZE) #define CSR1212_CSR_ARCH_REG_SPACE_BASE (0xfffff0000000ULL) #define CSR1212_CSR_ARCH_REG_SPACE_SIZE (512) #define CSR1212_CSR_ARCH_REG_SPACE_END (CSR1212_CSR_ARCH_REG_SPACE_BASE + CSR1212_CSR_ARCH_REG_SPACE_SIZE) #define CSR1212_CSR_ARCH_REG_SPACE_OFFSET (CSR1212_CSR_ARCH_REG_SPACE_BASE - CSR1212_REGISTER_SPACE_BASE) #define CSR1212_CSR_BUS_DEP_REG_SPACE_BASE (0xfffff0000200ULL) #define CSR1212_CSR_BUS_DEP_REG_SPACE_SIZE (512) #define CSR1212_CSR_BUS_DEP_REG_SPACE_END (CSR1212_CSR_BUS_DEP_REG_SPACE_BASE + CSR1212_CSR_BUS_DEP_REG_SPACE_SIZE) #define CSR1212_CSR_BUS_DEP_REG_SPACE_OFFSET (CSR1212_CSR_BUS_DEP_REG_SPACE_BASE - CSR1212_REGISTER_SPACE_BASE) #define CSR1212_CONFIG_ROM_SPACE_BASE (0xfffff0000400ULL) #define CSR1212_CONFIG_ROM_SPACE_SIZE (1024) #define CSR1212_CONFIG_ROM_SPACE_END (CSR1212_CONFIG_ROM_SPACE_BASE + CSR1212_CONFIG_ROM_SPACE_SIZE) #define CSR1212_CONFIG_ROM_SPACE_OFFSET (CSR1212_CONFIG_ROM_SPACE_BASE - CSR1212_REGISTER_SPACE_BASE) #define CSR1212_UNITS_SPACE_BASE (0xfffff0000800ULL) #define CSR1212_UNITS_SPACE_SIZE ((256ULL * (1ULL << 20)) - 2048) #define CSR1212_UNITS_SPACE_END (CSR1212_UNITS_SPACE_BASE + CSR1212_UNITS_SPACE_SIZE) #define CSR1212_UNITS_SPACE_OFFSET (CSR1212_UNITS_SPACE_BASE - CSR1212_REGISTER_SPACE_BASE) #define CSR1212_INVALID_ADDR_SPACE -1 /* Config ROM image structures */ struct csr1212_bus_info_block_img { u8 length; u8 crc_length; u16 crc; /* Must be last */ u32 data[0]; /* older gcc can't handle [] which is standard */ }; struct csr1212_leaf { int len; u32 *data; }; struct csr1212_dentry { struct csr1212_dentry *next, *prev; struct csr1212_keyval *kv; }; struct csr1212_directory { int len; struct csr1212_dentry *dentries_head, *dentries_tail; }; struct csr1212_keyval { struct { u8 type; u8 id; } key; union { u32 immediate; u32 csr_offset; struct csr1212_leaf leaf; struct csr1212_directory directory; } value; struct csr1212_keyval *associate; atomic_t refcnt; /* used in generating and/or parsing CSR image */ struct csr1212_keyval *next, *prev; /* flat list of CSR elements */ u32 offset; /* position in CSR from 0xffff f000 0000 */ u8 valid; /* flag indicating keyval has valid data*/ }; struct csr1212_cache_region { struct csr1212_cache_region *next, *prev; u32 offset_start; /* inclusive */ u32 offset_end; /* exclusive */ }; struct csr1212_csr_rom_cache { struct csr1212_csr_rom_cache *next, *prev; struct csr1212_cache_region *filled_head, *filled_tail; struct csr1212_keyval *layout_head, *layout_tail; size_t size; u32 offset; struct csr1212_keyval *ext_rom; size_t len; /* Must be last */ u32 data[0]; /* older gcc can't handle [] which is standard */ }; struct csr1212_csr { size_t bus_info_len; /* bus info block length in bytes */ size_t crc_len; /* crc length in bytes */ u32 *bus_info_data; /* bus info data incl bus name and EUI */ void *private; /* private, bus specific data */ struct csr1212_bus_ops *ops; struct csr1212_keyval *root_kv; int max_rom; /* max bytes readable in Config ROM region */ /* Items below used for image parsing and generation */ struct csr1212_csr_rom_cache *cache_head, *cache_tail; }; struct csr1212_bus_ops { /* This function is used by csr1212 to read additional information * from remote nodes when parsing a Config ROM (i.e., read Config ROM * entries located in the Units Space. Must return 0 on success * anything else indicates an error. */ int (*bus_read) (struct csr1212_csr *csr, u64 addr, u16 length, void *buffer, void *private); /* This function is used by csr1212 to allocate a region in units space * in the event that Config ROM entries don't all fit in the predefined * 1K region. The void *private parameter is private member of struct * csr1212_csr. */ u64 (*allocate_addr_range) (u64 size, u32 alignment, void *private); /* This function is used by csr1212 to release a region in units space * that is no longer needed. */ void (*release_addr) (u64 addr, void *private); /* This function is used by csr1212 to determine the max read request * supported by a remote node when reading the ConfigROM space. Must * return 0, 1, or 2 per IEEE 1212. */ int (*get_max_rom) (u32 *bus_info, void *private); }; /* Descriptor Leaf manipulation macros */ #define CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT 24 #define CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID_MASK 0xffffff #define CSR1212_DESCRIPTOR_LEAF_OVERHEAD (1 * sizeof(u32)) #define CSR1212_DESCRIPTOR_LEAF_TYPE(kv) \ (be32_to_cpu((kv)->value.leaf.data[0]) >> \ CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT) #define CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) \ (be32_to_cpu((kv)->value.leaf.data[0]) & \ CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID_MASK) /* Text Descriptor Leaf manipulation macros */ #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH_SHIFT 28 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH_MASK 0xf /* after shift */ #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET_SHIFT 16 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET_MASK 0xfff /* after shift */ #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE_MASK 0xffff #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_OVERHEAD (1 * sizeof(u32)) #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) \ (be32_to_cpu((kv)->value.leaf.data[1]) >> \ CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH_SHIFT) #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) \ ((be32_to_cpu((kv)->value.leaf.data[1]) >> \ CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET_SHIFT) & \ CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET_MASK) #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) \ (be32_to_cpu((kv)->value.leaf.data[1]) & \ CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE_MASK) #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(kv) \ (&((kv)->value.leaf.data[2])) /* The following 2 function are for creating new Configuration ROM trees. The * first function is used for both creating local trees and parsing remote * trees. The second function adds pertinent information to local Configuration * ROM trees - namely data for the bus information block. */ extern struct csr1212_csr *csr1212_create_csr(struct csr1212_bus_ops *ops, size_t bus_info_size, void *private); extern void csr1212_init_local_csr(struct csr1212_csr *csr, const u32 *bus_info_data, int max_rom); /* Destroy a Configuration ROM tree and release all memory taken by the tree. */ extern void csr1212_destroy_csr(struct csr1212_csr *csr); /* The following set of functions are fore creating new keyvals for placement in * a Configuration ROM tree. Code that creates new keyvals with these functions * must release those keyvals with csr1212_release_keyval() when they are no * longer needed. */ extern struct csr1212_keyval *csr1212_new_immediate(u8 key, u32 value); extern struct csr1212_keyval *csr1212_new_directory(u8 key); extern struct csr1212_keyval *csr1212_new_string_descriptor_leaf(const char *s); /* The following function manages association between keyvals. Typically, * Descriptor Leaves and Directories will be associated with another keyval and * it is desirable for the Descriptor keyval to be place immediately after the * keyval that it is associated with. * Take care with subsequent ROM modifications: There is no function to remove * previously specified associations. */ extern void csr1212_associate_keyval(struct csr1212_keyval *kv, struct csr1212_keyval *associate); /* The following functions manage the association of a keyval and directories. * A keyval may be attached to more than one directory. */ extern int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir, struct csr1212_keyval *kv); extern void csr1212_detach_keyval_from_directory(struct csr1212_keyval *dir, struct csr1212_keyval *kv); /* Creates a complete Configuration ROM image in the list of caches available * via csr->cache_head. */ extern int csr1212_generate_csr_image(struct csr1212_csr *csr); /* This is a convience function for reading a block of data out of one of the * caches in the csr->cache_head list. */ extern int csr1212_read(struct csr1212_csr *csr, u32 offset, void *buffer, u32 len); /* The following functions are in place for parsing Configuration ROM images. * csr1212_parse_keyval() is used should there be a need to directly parse a * Configuration ROM directly. */ extern int csr1212_parse_keyval(struct csr1212_keyval *kv, struct csr1212_csr_rom_cache *cache); extern int csr1212_parse_csr(struct csr1212_csr *csr); /* This function allocates a new cache which may be used for either parsing or * generating sub-sets of Configuration ROM images. */ static inline struct csr1212_csr_rom_cache * csr1212_rom_cache_malloc(u32 offset, size_t size) { struct csr1212_csr_rom_cache *cache; cache = CSR1212_MALLOC(sizeof(*cache) + size); if (!cache) return NULL; cache->next = NULL; cache->prev = NULL; cache->filled_head = NULL; cache->filled_tail = NULL; cache->layout_head = NULL; cache->layout_tail = NULL; cache->offset = offset; cache->size = size; cache->ext_rom = NULL; return cache; } /* This function ensures that a keyval contains data when referencing a keyval * created by parsing a Configuration ROM. */ extern struct csr1212_keyval * csr1212_get_keyval(struct csr1212_csr *csr, struct csr1212_keyval *kv); /* This function increments the reference count for a keyval should there be a * need for code to retain a keyval that has been parsed. */ static inline void csr1212_keep_keyval(struct csr1212_keyval *kv) { atomic_inc(&kv->refcnt); smp_mb__after_atomic_inc(); } /* This function decrements a keyval's reference count and will destroy the * keyval when there are no more users of the keyval. This should be called by * any code that calls csr1212_keep_keyval() or any of the keyval creation * routines csr1212_new_*(). */ extern void csr1212_release_keyval(struct csr1212_keyval *kv); /* * This macro allows for looping over the keyval entries in a directory and it * ensures that keyvals from remote ConfigROMs are parsed properly. * * struct csr1212_csr *_csr points to the CSR associated with dir. * struct csr1212_keyval *_kv points to the current keyval (loop index). * struct csr1212_keyval *_dir points to the directory to be looped. * struct csr1212_dentry *_pos is used internally for indexing. * * kv will be NULL upon exit of the loop. */ #define csr1212_for_each_dir_entry(_csr, _kv, _dir, _pos) \ for (csr1212_get_keyval((_csr), (_dir)), \ _pos = (_dir)->value.directory.dentries_head, \ _kv = (_pos) ? csr1212_get_keyval((_csr), _pos->kv) : NULL;\ (_kv) && (_pos); \ (_kv->associate == NULL) ? \ ((_pos = _pos->next), (_kv = (_pos) ? \ csr1212_get_keyval((_csr), _pos->kv) : \ NULL)) : \ (_kv = csr1212_get_keyval((_csr), _kv->associate))) #endif /* __CSR1212_H__ */