freebsd-nq/sys/sparc64/include/bus_private.h
Marius Strobl bda8e754a1 Make sparc64 compatible with NEW_PCIB and enable it:
- 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.
2011-10-02 23:22:38 +00:00

82 lines
3.3 KiB
C

/*-
* Copyright (c) 1997, 1998 Justin T. Gibbs.
* Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>.
* All rights reserved.
*
* 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.
*
* 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 OR CONTRIBUTORS 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.
*
* from: FreeBSD: src/sys/i386/i386/busdma_machdep.c,v 1.25 2002/01/05
*
* $FreeBSD$
*/
#ifndef _MACHINE_BUS_PRIVATE_H_
#define _MACHINE_BUS_PRIVATE_H_
#include <sys/queue.h>
/*
* Helpers
*/
int sparc64_bus_mem_map(bus_space_tag_t tag, bus_addr_t addr, bus_size_t size,
int flags, vm_offset_t vaddr, bus_space_handle_t *hp);
int sparc64_bus_mem_unmap(bus_space_tag_t tag, bus_space_handle_t handle,
bus_size_t size);
bus_space_tag_t sparc64_alloc_bus_tag(void *cookie,
struct bus_space_tag *ptag, int type, void *barrier);
bus_space_handle_t sparc64_fake_bustag(int space, bus_addr_t addr,
struct bus_space_tag *ptag);
struct bus_dmamap_res {
struct resource *dr_res;
bus_size_t dr_used;
SLIST_ENTRY(bus_dmamap_res) dr_link;
};
/*
* Callers of the bus_dma interfaces must always protect their tags and maps
* appropriately against concurrent access. However, when a map is on a LRU
* queue, there is a second access path to it; for this case, the locking rules
* are given in the parenthesized comments below:
* q - locked by the mutex protecting the queue.
* p - private to the owner of the map, no access through the queue.
* * - comment refers to pointer target.
* Only the owner of the map is allowed to insert the map into a queue. Removal
* and repositioning (i.e. temporal removal and reinsertion) is allowed to all
* if the queue lock is held.
*/
struct bus_dmamap {
TAILQ_ENTRY(bus_dmamap) dm_maplruq; /* (q) */
SLIST_HEAD(, bus_dmamap_res) dm_reslist; /* (q, *q) */
int dm_onq; /* (q) */
int dm_flags; /* (p) */
};
/* Flag values */
#define DMF_LOADED (1 << 0) /* Map is loaded. */
#define DMF_COHERENT (1 << 1) /* Coherent mapping requested. */
#define DMF_STREAMED (1 << 2) /* Streaming cache used. */
int sparc64_dma_alloc_map(bus_dma_tag_t dmat, bus_dmamap_t *mapp);
void sparc64_dma_free_map(bus_dma_tag_t dmat, bus_dmamap_t map);
#endif /* !_MACHINE_BUS_PRIVATE_H_ */