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/* $OpenBSD: cn30xxfpa.c,v 1.9 2017/11/05 04:57:28 visa Exp $ */
/*
* Copyright (c) 2007 Internet Initiative Japan, Inc.
* 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 REGENTS 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 REGENTS 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/malloc.h>
#include <machine/bus.h>
#include <machine/vmparam.h>
#include <machine/octeonvar.h>
#include <octeon/dev/cn30xxfpavar.h>
#include <octeon/dev/cn30xxfpareg.h>
struct cn30xxfpa_softc {
int sc_initialized;
bus_space_tag_t sc_regt;
bus_space_handle_t sc_regh;
bus_dma_tag_t sc_dmat;
};
void cn30xxfpa_bootstrap(struct octeon_config *);
void cn30xxfpa_reset(void);
void cn30xxfpa_int_enable(struct cn30xxfpa_softc *, int);
void cn30xxfpa_buf_dma_alloc(struct cn30xxfpa_buf *);
void cn30xxfpa_init(struct cn30xxfpa_softc *);
#ifdef notyet
uint64_t cn30xxfpa_iobdma(struct cn30xxfpa_softc *, int, int);
#endif
static struct cn30xxfpa_softc cn30xxfpa_softc;
/* ---- global functions */
void
cn30xxfpa_bootstrap(struct octeon_config *mcp)
{
struct cn30xxfpa_softc *sc = &cn30xxfpa_softc;
sc->sc_regt = mcp->mc_iobus_bust;
sc->sc_dmat = mcp->mc_iobus_dmat;
cn30xxfpa_init(sc);
}
void
cn30xxfpa_reset(void)
{
/* XXX */
}
int
cn30xxfpa_buf_init(int poolno, size_t size, size_t nelems,
struct cn30xxfpa_buf **rfb)
{
struct cn30xxfpa_softc *sc = &cn30xxfpa_softc;
struct cn30xxfpa_buf *fb;
int nsegs;
paddr_t paddr;
nsegs = 1/* XXX */;
fb = malloc(sizeof(*fb) + sizeof(*fb->fb_dma_segs) * nsegs, M_DEVBUF,
M_WAITOK | M_ZERO);
if (fb == NULL)
return 1;
fb->fb_poolno = poolno;
fb->fb_size = size;
fb->fb_nelems = nelems;
fb->fb_len = size * nelems;
fb->fb_dmat = sc->sc_dmat;
fb->fb_dma_segs = (void *)(fb + 1);
fb->fb_dma_nsegs = nsegs;
cn30xxfpa_buf_dma_alloc(fb);
for (paddr = fb->fb_paddr; paddr < fb->fb_paddr + fb->fb_len;
paddr += fb->fb_size)
cn30xxfpa_buf_put_paddr(fb, paddr);
*rfb = fb;
return 0;
}
void *
cn30xxfpa_buf_get(struct cn30xxfpa_buf *fb)
{
paddr_t paddr;
vaddr_t addr;
paddr = cn30xxfpa_buf_get_paddr(fb);
if (paddr == 0)
addr = 0;
else
addr = fb->fb_addr + (vaddr_t/* XXX */)(paddr - fb->fb_paddr);
return (void *)addr;
}
void
cn30xxfpa_buf_dma_alloc(struct cn30xxfpa_buf *fb)
{
int status;
int nsegs;
caddr_t va;
status = bus_dmamap_create(fb->fb_dmat, fb->fb_len,
fb->fb_len / PAGE_SIZE, /* # of segments */
fb->fb_len, /* we don't use s/g for FPA buf */
PAGE_SIZE, /* OCTEON hates >PAGE_SIZE boundary */
0, &fb->fb_dmah);
if (status != 0)
panic("%s failed", "bus_dmamap_create");
status = bus_dmamem_alloc(fb->fb_dmat, fb->fb_len, CACHELINESIZE, 0,
fb->fb_dma_segs, fb->fb_dma_nsegs, &nsegs, 0);
if (status != 0 || fb->fb_dma_nsegs != nsegs)
panic("%s failed", "bus_dmamem_alloc");
status = bus_dmamem_map(fb->fb_dmat, fb->fb_dma_segs, fb->fb_dma_nsegs,
fb->fb_len, &va, 0);
if (status != 0)
panic("%s failed", "bus_dmamem_map");
status = bus_dmamap_load(fb->fb_dmat, fb->fb_dmah, va, fb->fb_len,
NULL, /* kernel */
0);
if (status != 0)
panic("%s failed", "bus_dmamap_load");
fb->fb_addr = (vaddr_t)va;
fb->fb_paddr = fb->fb_dma_segs[0].ds_addr;
}
uint64_t
cn30xxfpa_query(int poolno)
{
struct cn30xxfpa_softc *sc = &cn30xxfpa_softc;
return bus_space_read_8(sc->sc_regt, sc->sc_regh,
FPA_QUE0_AVAILABLE_OFFSET + sizeof(uint64_t) * poolno);
}
/* ---- local functions */
void cn30xxfpa_init_regs(struct cn30xxfpa_softc *);
void
cn30xxfpa_init(struct cn30xxfpa_softc *sc)
{
if (sc->sc_initialized != 0)
panic("%s: already initialized", __func__);
sc->sc_initialized = 1;
cn30xxfpa_init_regs(sc);
}
void
cn30xxfpa_init_regs(struct cn30xxfpa_softc *sc)
{
int status;
status = bus_space_map(sc->sc_regt, FPA_BASE, FPA_SIZE, 0,
&sc->sc_regh);
if (status != 0)
panic("%s: could not map FPA registers", __func__);
bus_space_write_8(sc->sc_regt, sc->sc_regh, FPA_CTL_STATUS_OFFSET,
FPA_CTL_STATUS_ENB);
}
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