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NetBSD/sys/arch/alpha/pci/tsp_dma.c

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/* $NetBSD: tsp_dma.c,v 1.1 1999/06/29 06:46:47 ross Exp $ */
/*-
* Copyright (c) 1999 by Ross Harvey. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Ross Harvey.
* 4. The name of Ross Harvey may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE
* ARE DISCLAIMED. IN NO EVENT SHALL ROSS HARVEY 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.
*
*/
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <vm/vm.h>
#include <machine/autoconf.h>
#define _ALPHA_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <machine/rpb.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/tsreg.h>
#include <alpha/pci/tsvar.h>
#define tsp_dma() { Generate ctags(1) key. }
#define EDIFF(a, b) (((a) | WSBA_ENA | WSBA_SG) != ((b) | WSBA_ENA | WSBA_SG))
bus_dma_tag_t tsp_dma_get_tag __P((bus_dma_tag_t, alpha_bus_t));
int tsp_bus_dmamap_create_sgmap __P((bus_dma_tag_t, bus_size_t, int,
bus_size_t, bus_size_t, int, bus_dmamap_t *));
void tsp_bus_dmamap_destroy_sgmap __P((bus_dma_tag_t, bus_dmamap_t));
int tsp_bus_dmamap_load_sgmap __P((bus_dma_tag_t, bus_dmamap_t, void *,
bus_size_t, struct proc *, int));
int tsp_bus_dmamap_load_mbuf_sgmap __P((bus_dma_tag_t, bus_dmamap_t,
struct mbuf *, int));
int tsp_bus_dmamap_load_uio_sgmap __P((bus_dma_tag_t, bus_dmamap_t,
struct uio *, int));
int tsp_bus_dmamap_load_raw_sgmap __P((bus_dma_tag_t, bus_dmamap_t,
bus_dma_segment_t *, int, bus_size_t, int));
void tsp_bus_dmamap_unload_sgmap __P((bus_dma_tag_t, bus_dmamap_t));
void tsp_tlb_invalidate __P((struct tsp_config *));
void
tsp_dma_init(pcp)
struct tsp_config *pcp;
{
int i;
bus_dma_tag_t t;
struct ts_pchip *pccsr = pcp->pc_csr;
bus_addr_t dwbase, dwlen, sgwbase, sgwlen, tbase;
static struct map_expected {
u_int32_t base, mask, enables;
} premap[4] = {
{ 0x800000, 0x700000, WSBA_ENA | WSBA_SG },
{ 0x80000000 | WSBA_ENA, 0x3ff00000, WSBA_ENA },
{ 0, 0 },
{ 0, 0 }
};
alpha_mb();
for(i = 0; i < 4; ++i) {
if (EDIFF(pccsr->tsp_wsba[i].tsg_r, premap[i].base) ||
EDIFF(pccsr->tsp_wsm[i].tsg_r, premap[i].mask))
printf("tsp%d: window %d: %lx/base %lx/mask %lx"
" reinitialized\n",
pcp->pc_pslot, i,
pccsr->tsp_wsba[i].tsg_r,
pccsr->tsp_wsm[i].tsg_r,
pccsr->tsp_tba[i].tsg_r);
pccsr->tsp_wsba[i].tsg_r = premap[i].base | premap[i].enables;
pccsr->tsp_wsm[i].tsg_r = premap[i].mask;
}
alpha_mb();
/*
* Initialize the DMA tag used for direct-mapped DMA.
*/
t = &pcp->pc_dmat_direct;
t->_cookie = pcp;
t->_wbase = dwbase = WSBA_ADDR(pccsr->tsp_wsba[1].tsg_r);
t->_wsize = dwlen = WSM_LEN(pccsr->tsp_wsm[1].tsg_r);
t->_next_window = &pcp->pc_dmat_sgmap;
t->_boundary = 0;
t->_sgmap = NULL;
t->_get_tag = tsp_dma_get_tag;
t->_dmamap_create = _bus_dmamap_create;
t->_dmamap_destroy = _bus_dmamap_destroy;
t->_dmamap_load = _bus_dmamap_load_direct;
t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct;
t->_dmamap_load_uio = _bus_dmamap_load_uio_direct;
t->_dmamap_load_raw = _bus_dmamap_load_raw_direct;
t->_dmamap_unload = _bus_dmamap_unload;
t->_dmamap_sync = _bus_dmamap_sync;
t->_dmamem_alloc = _bus_dmamem_alloc;
t->_dmamem_free = _bus_dmamem_free;
t->_dmamem_map = _bus_dmamem_map;
t->_dmamem_unmap = _bus_dmamem_unmap;
t->_dmamem_mmap = _bus_dmamem_mmap;
/*
* Initialize the DMA tag used for sgmap-mapped DMA.
*/
t = &pcp->pc_dmat_sgmap;
t->_cookie = pcp;
t->_wbase = sgwbase = WSBA_ADDR(pccsr->tsp_wsba[0].tsg_r);
t->_wsize = sgwlen = WSM_LEN(pccsr->tsp_wsm[0].tsg_r);
t->_next_window = NULL;
t->_boundary = 0;
t->_sgmap = &pcp->pc_sgmap;
t->_get_tag = tsp_dma_get_tag;
t->_dmamap_create = tsp_bus_dmamap_create_sgmap;
t->_dmamap_destroy = tsp_bus_dmamap_destroy_sgmap;
t->_dmamap_load = tsp_bus_dmamap_load_sgmap;
t->_dmamap_load_mbuf = tsp_bus_dmamap_load_mbuf_sgmap;
t->_dmamap_load_uio = tsp_bus_dmamap_load_uio_sgmap;
t->_dmamap_load_raw = tsp_bus_dmamap_load_raw_sgmap;
t->_dmamap_unload = tsp_bus_dmamap_unload_sgmap;
t->_dmamap_sync = _bus_dmamap_sync;
t->_dmamem_alloc = _bus_dmamem_alloc;
t->_dmamem_free = _bus_dmamem_free;
t->_dmamem_map = _bus_dmamem_map;
t->_dmamem_unmap = _bus_dmamem_unmap;
t->_dmamem_mmap = _bus_dmamem_mmap;
/*
* Initialize the SGMAP. Align page table to 32k in case
* window is somewhat larger than expected.
*/
alpha_sgmap_init(t, &pcp->pc_sgmap, "tsp_sgmap",
sgwbase, 0, sgwlen, sizeof(u_int64_t), NULL, (32*1024));
/*
* Enable window 0 and enable SG PTE mapping.
*/
alpha_mb();
pccsr->tsp_wsba[0].tsg_r |= WSBA_SG | WSBA_ENA;
alpha_mb();
/*
* Check windows for sanity, especially if we later decide to
* use the firmware's initialization in some cases.
*/
if ((sgwbase <= dwbase && dwbase < sgwbase + sgwlen) ||
(dwbase <= sgwbase && sgwbase < dwbase + dwlen))
panic("tsp_dma_init: overlap");
tbase = pcp->pc_sgmap.aps_ptpa;
if (tbase & ~0x7fffffc00UL)
panic("tsp_dma_init: bad page table address");
alpha_mb();
pccsr->tsp_tba[0].tsg_r = tbase;
alpha_mb();
tsp_tlb_invalidate(pcp);
alpha_mb();
/* XXX XXX BEGIN XXX XXX */
{ /* XXX */
extern paddr_t alpha_XXX_dmamap_or; /* XXX */
alpha_XXX_dmamap_or = dwbase; /* XXX */
} /* XXX */
/* XXX XXX END XXX XXX */
}
/*
* Return the bus dma tag to be used for the specified bus type.
* INTERNAL USE ONLY!
*/
bus_dma_tag_t
tsp_dma_get_tag(t, bustype)
bus_dma_tag_t t;
alpha_bus_t bustype;
{
struct tsp_config *pcp = t->_cookie;
switch (bustype) {
case ALPHA_BUS_PCI:
case ALPHA_BUS_EISA:
/*
* The direct mapped window will work for most systems,
* most of the time. When it doesn't, we chain to the sgmap
* window automatically.
*/
return (&pcp->pc_dmat_direct);
case ALPHA_BUS_ISA:
/*
* ISA doesn't have enough address bits to use
* the direct-mapped DMA window, so we must use
* SGMAPs.
*/
return (&pcp->pc_dmat_sgmap);
default:
panic("tsp_dma_get_tag: shouldn't be here, really...");
}
}
/*
* Create a TSP SGMAP-mapped DMA map.
*/
int
tsp_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary,
flags, dmamp)
bus_dma_tag_t t;
bus_size_t size;
int nsegments;
bus_size_t maxsegsz;
bus_size_t boundary;
int flags;
bus_dmamap_t *dmamp;
{
bus_dmamap_t map;
int error;
error = _bus_dmamap_create(t, size, nsegments, maxsegsz,
boundary, flags, dmamp);
if (error)
return (error);
map = *dmamp;
if (flags & BUS_DMA_ALLOCNOW) {
error = alpha_sgmap_alloc(map, round_page(size),
t->_sgmap, flags);
if (error)
tsp_bus_dmamap_destroy_sgmap(t, map);
}
return (error);
}
/*
* Destroy a TSP SGMAP-mapped DMA map.
*/
void
tsp_bus_dmamap_destroy_sgmap(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
if (map->_dm_flags & DMAMAP_HAS_SGMAP)
alpha_sgmap_free(map, t->_sgmap);
_bus_dmamap_destroy(t, map);
}
/*
* Load a TSP SGMAP-mapped DMA map with a linear buffer.
*/
int
tsp_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
void *buf;
bus_size_t buflen;
struct proc *p;
int flags;
{
int error;
error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags,
t->_sgmap);
if (error == 0)
tsp_tlb_invalidate(t->_cookie);
return (error);
}
/*
* Load a TSP SGMAP-mapped DMA map with an mbuf chain.
*/
int
tsp_bus_dmamap_load_mbuf_sgmap(t, map, m, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct mbuf *m;
int flags;
{
int error;
error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap);
if (error == 0)
tsp_tlb_invalidate(t->_cookie);
return (error);
}
/*
* Load a TSP SGMAP-mapped DMA map with a uio.
*/
int
tsp_bus_dmamap_load_uio_sgmap(t, map, uio, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
struct uio *uio;
int flags;
{
int error;
error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap);
if (error == 0)
tsp_tlb_invalidate(t->_cookie);
return (error);
}
/*
* Load a TSP SGMAP-mapped DMA map with raw memory.
*/
int
tsp_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags)
bus_dma_tag_t t;
bus_dmamap_t map;
bus_dma_segment_t *segs;
int nsegs;
bus_size_t size;
int flags;
{
int error;
error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags,
t->_sgmap);
if (error == 0)
tsp_tlb_invalidate(t->_cookie);
return (error);
}
/*
* Unload a TSP DMA map.
*/
void
tsp_bus_dmamap_unload_sgmap(t, map)
bus_dma_tag_t t;
bus_dmamap_t map;
{
/*
* Invalidate any SGMAP page table entries used by this
* mapping.
*/
pci_sgmap_pte64_unload(t, map, t->_sgmap);
tsp_tlb_invalidate(t->_cookie);
/*
* Do the generic bits of the unload.
*/
_bus_dmamap_unload(t, map);
}
/*
* Flush the TSP scatter/gather TLB.
*/
void
tsp_tlb_invalidate(pcp)
struct tsp_config *pcp;
{
alpha_mb();
pcp->pc_csr->tsp_tlbia.tsg_r = 0;
alpha_mb();
}
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