/*- * Copyright (c) 2015-2016 Landon Fuller * Copyright (c) 2017 The FreeBSD Foundation * All rights reserved. * * Portions of this software were developed by Landon Fuller * under sponsorship from the FreeBSD Foundation. * * Portions of this software were developed by Landon Fuller * under sponsorship from the FreeBSD Foundation. * * 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, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any * redistribution must be conditioned upon including a substantially * similar Disclaimer requirement for further binary redistribution. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. * */ #ifndef _BHND_BHNDB_PRIVATE_H_ #define _BHND_BHNDB_PRIVATE_H_ #include #include #include #include #include #include #include #include "bhndbvar.h" /* * Private bhndb(4) driver definitions. */ struct bhndb_dw_alloc; struct bhndb_intr_handler; struct bhndb_region; struct bhndb_resources; struct bhndb_resources *bhndb_alloc_resources(device_t dev, device_t parent_dev, const struct bhndb_hwcfg *cfg); void bhndb_free_resources( struct bhndb_resources *br); int bhndb_add_resource_region( struct bhndb_resources *br, bhnd_addr_t addr, bhnd_size_t size, bhndb_priority_t priority, uint32_t alloc_flags, const struct bhndb_regwin *static_regwin); int bhndb_find_resource_limits( struct bhndb_resources *br, struct resource *r, rman_res_t *start, rman_res_t *end); struct bhndb_intr_handler *bhndb_alloc_intr_handler(device_t owner, struct resource *r, struct bhndb_intr_isrc *isrc); void bhndb_free_intr_handler( struct bhndb_intr_handler *ih); void bhndb_register_intr_handler( struct bhndb_resources *br, struct bhndb_intr_handler *ih); void bhndb_deregister_intr_handler( struct bhndb_resources *br, struct bhndb_intr_handler *ih); struct bhndb_intr_handler *bhndb_find_intr_handler( struct bhndb_resources *br, void *cookiep); bool bhndb_has_static_region_mapping( struct bhndb_resources *br, bhnd_addr_t addr, bhnd_size_t size); struct bhndb_region *bhndb_find_resource_region( struct bhndb_resources *br, bhnd_addr_t addr, bhnd_size_t size); struct bhndb_dw_alloc *bhndb_dw_find_resource( struct bhndb_resources *dr, struct resource *r); struct bhndb_dw_alloc *bhndb_dw_find_mapping( struct bhndb_resources *br, bhnd_addr_t addr, bhnd_size_t size); int bhndb_dw_retain( struct bhndb_resources *br, struct bhndb_dw_alloc *dwa, struct resource *res); void bhndb_dw_release( struct bhndb_resources *br, struct bhndb_dw_alloc *dwa, struct resource *res); int bhndb_dw_set_addr(device_t dev, struct bhndb_resources *br, struct bhndb_dw_alloc *dwa, bus_addr_t addr, bus_size_t size); struct bhndb_dw_alloc *bhndb_dw_steal(struct bhndb_resources *br, bus_addr_t *saved); void bhndb_dw_return_stolen(device_t dev, struct bhndb_resources *br, struct bhndb_dw_alloc *dwa, bus_addr_t saved); const struct bhndb_hw_priority *bhndb_hw_priority_find_core( const struct bhndb_hw_priority *table, struct bhnd_core_info *core); const struct bhndb_port_priority *bhndb_hw_priorty_find_port( const struct bhndb_hw_priority *table, struct bhnd_core_info *core, bhnd_port_type port_type, u_int port, u_int region); /** * Dynamic register window allocation reference. */ struct bhndb_dw_rentry { struct resource *dw_res; /**< child resource */ LIST_ENTRY(bhndb_dw_rentry) dw_link; }; /** * A dynamic register window allocation record. */ struct bhndb_dw_alloc { const struct bhndb_regwin *win; /**< window definition */ struct resource *parent_res; /**< enclosing resource */ u_int rnid; /**< region identifier */ rman_res_t target; /**< the current window address, or 0x0 if unknown */ LIST_HEAD(, bhndb_dw_rentry) refs; /**< references */ }; /** * A bus address region description. */ struct bhndb_region { bhnd_addr_t addr; /**< start of mapped range */ bhnd_size_t size; /**< size of mapped range */ bhndb_priority_t priority; /**< direct resource allocation priority */ uint32_t alloc_flags; /**< resource allocation flags (@see bhndb_alloc_flags) */ const struct bhndb_regwin *static_regwin; /**< fixed mapping regwin, if any */ STAILQ_ENTRY(bhndb_region) link; }; /** * Attached interrupt handler state */ struct bhndb_intr_handler { device_t ih_owner; /**< child device */ struct resource *ih_res; /**< child resource */ void *ih_cookiep; /**< hostb-assigned cookiep, or NULL if bus_setup_intr() incomplete. */ struct bhndb_intr_isrc *ih_isrc; /**< host interrupt source routing the child's interrupt */ bool ih_active; /**< handler has been registered via bhndb_register_intr_handler */ STAILQ_ENTRY(bhndb_intr_handler) ih_link; }; /** * BHNDB resource allocation state. */ struct bhndb_resources { device_t dev; /**< bridge device */ const struct bhndb_hwcfg *cfg; /**< hardware configuration */ struct bhndb_host_resources *res; /**< host resources, or NULL if not allocated */ struct rman ht_mem_rman; /**< host memory manager */ struct rman br_mem_rman; /**< bridged memory manager */ struct rman br_irq_rman; /**< bridged irq manager */ STAILQ_HEAD(, bhndb_region) bus_regions; /**< bus region descriptors */ struct mtx dw_steal_mtx; /**< spinlock must be held when stealing a dynamic window allocation */ struct bhndb_dw_alloc *dw_alloc; /**< dynamic window allocation records */ size_t dwa_count; /**< number of dynamic windows available. */ bitstr_t *dwa_freelist; /**< dynamic window free list */ bhndb_priority_t min_prio; /**< minimum resource priority required to allocate a dynamic window */ STAILQ_HEAD(,bhndb_intr_handler) bus_intrs; /**< attached child interrupt handlers */ }; /** * Returns true if the all dynamic windows are marked free, false * otherwise. * * @param br The resource state to check. */ static inline bool bhndb_dw_all_free(struct bhndb_resources *br) { int bit; bit_ffs(br->dwa_freelist, br->dwa_count, &bit); return (bit == -1); } /** * Find the next free dynamic window region in @p br. * * @param br The resource state to search. */ static inline struct bhndb_dw_alloc * bhndb_dw_next_free(struct bhndb_resources *br) { struct bhndb_dw_alloc *dw_free; int bit; bit_ffc(br->dwa_freelist, br->dwa_count, &bit); if (bit == -1) return (NULL); dw_free = &br->dw_alloc[bit]; KASSERT(LIST_EMPTY(&dw_free->refs), ("free list out of sync with refs")); return (dw_free); } /** * Returns true if a dynamic window allocation is marked as free. * * @param br The resource state owning @p dwa. * @param dwa The dynamic window allocation record to be checked. */ static inline bool bhndb_dw_is_free(struct bhndb_resources *br, struct bhndb_dw_alloc *dwa) { bool is_free = LIST_EMPTY(&dwa->refs); KASSERT(is_free == !bit_test(br->dwa_freelist, dwa->rnid), ("refs out of sync with free list")); return (is_free); } #define BHNDB_LOCK_INIT(sc) \ mtx_init(&(sc)->sc_mtx, device_get_nameunit((sc)->dev), \ "bhndb resource allocator lock", MTX_DEF) #define BHNDB_LOCK(sc) mtx_lock(&(sc)->sc_mtx) #define BHNDB_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx) #define BHNDB_LOCK_ASSERT(sc, what) mtx_assert(&(sc)->sc_mtx, what) #define BHNDB_LOCK_DESTROY(sc) mtx_destroy(&(sc)->sc_mtx) #endif /* _BHND_BHNDB_PRIVATE_H_ */