b730263346
- Implement bus_adjust_resource() methods as far as necessary and in non-PCI bridge drivers as far as feasible without rototilling them. - As NEW_PCIB does a layering violation by activating resources at layers above pci(4) without previously bubbling up their allocation there, move the assignment of bus tags and handles from the bus_alloc_resource() to the bus_activate_resource() methods like at least the other NEW_PCIB enabled architectures do. This is somewhat unfortunate as previously sparc64 (ab)used resource activation to indicate whether SYS_RES_MEMORY resources should be mapped into KVA, which is only necessary if their going to be accessed via the pointer returned from rman_get_virtual() but not for bus_space(9) as the later always uses physical access on sparc64. Besides wasting KVA if we always map in SYS_RES_MEMORY resources, a driver also may deliberately not map them in if the firmware already has done so, possibly in a special way. So in order to still allow a driver to decide whether a SYS_RES_MEMORY resource should be mapped into KVA we let it indicate that by calling bus_space_map(9) with BUS_SPACE_MAP_LINEAR as actually documented in the bus_space(9) page. This is implemented by allocating a separate bus tag per SYS_RES_MEMORY resource and passing the resource via the previously unused bus tag cookie so we later on can call rman_set_virtual() in sparc64_bus_mem_map(). As a side effect this now also allows to actually indicate that a SYS_RES_MEMORY resource should be mapped in as cacheable and/or read-only via BUS_SPACE_MAP_CACHEABLE and BUS_SPACE_MAP_READONLY respectively. - Do some minor cleanup like taking advantage of rman_init_from_resource(), factor out the common part of bus tag allocation into a newly added sparc64_alloc_bus_tag(), hook up some missing newbus methods and replace some homegrown versions with the generic counterparts etc. - While at it, let apb_attach() (which can't use the generic NEW_PCIB code as APB bridges just don't have the base and limit registers implemented) regarding the config space registers cached in pcib_softc and the SYSCTL reporting nodes set up.
82 lines
3.3 KiB
C
82 lines
3.3 KiB
C
/*-
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* Copyright (c) 1997, 1998 Justin T. Gibbs.
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* Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* from: FreeBSD: src/sys/i386/i386/busdma_machdep.c,v 1.25 2002/01/05
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_BUS_PRIVATE_H_
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#define _MACHINE_BUS_PRIVATE_H_
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#include <sys/queue.h>
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/*
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* Helpers
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*/
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int sparc64_bus_mem_map(bus_space_tag_t tag, bus_addr_t addr, bus_size_t size,
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int flags, vm_offset_t vaddr, bus_space_handle_t *hp);
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int sparc64_bus_mem_unmap(bus_space_tag_t tag, bus_space_handle_t handle,
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bus_size_t size);
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bus_space_tag_t sparc64_alloc_bus_tag(void *cookie,
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struct bus_space_tag *ptag, int type, void *barrier);
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bus_space_handle_t sparc64_fake_bustag(int space, bus_addr_t addr,
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struct bus_space_tag *ptag);
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struct bus_dmamap_res {
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struct resource *dr_res;
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bus_size_t dr_used;
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SLIST_ENTRY(bus_dmamap_res) dr_link;
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};
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/*
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* Callers of the bus_dma interfaces must always protect their tags and maps
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* appropriately against concurrent access. However, when a map is on a LRU
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* queue, there is a second access path to it; for this case, the locking rules
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* are given in the parenthesized comments below:
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* q - locked by the mutex protecting the queue.
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* p - private to the owner of the map, no access through the queue.
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* * - comment refers to pointer target.
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* Only the owner of the map is allowed to insert the map into a queue. Removal
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* and repositioning (i.e. temporal removal and reinsertion) is allowed to all
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* if the queue lock is held.
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*/
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struct bus_dmamap {
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TAILQ_ENTRY(bus_dmamap) dm_maplruq; /* (q) */
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SLIST_HEAD(, bus_dmamap_res) dm_reslist; /* (q, *q) */
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int dm_onq; /* (q) */
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int dm_flags; /* (p) */
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};
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/* Flag values */
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#define DMF_LOADED (1 << 0) /* Map is loaded. */
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#define DMF_COHERENT (1 << 1) /* Coherent mapping requested. */
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#define DMF_STREAMED (1 << 2) /* Streaming cache used. */
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int sparc64_dma_alloc_map(bus_dma_tag_t dmat, bus_dmamap_t *mapp);
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void sparc64_dma_free_map(bus_dma_tag_t dmat, bus_dmamap_t map);
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#endif /* !_MACHINE_BUS_PRIVATE_H_ */
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