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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* This file is part of the Chelsio T4 support code.
*
* Copyright (C) 2011-2013 Chelsio Communications. All rights reserved.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the LICENSE file included in this
* release for licensing terms and conditions.
*/
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/atomic.h>
#include <sys/types.h>
#include <sys/kmem.h>
#include "osdep.h"
#include "shared.h"
static int rxbuf_ctor(void *, void *, int);
static void rxbuf_dtor(void *, void *);
int
cxgb_printf(dev_info_t *dip, int level, char *f, ...)
{
va_list list;
char fmt[128];
int rv;
rv = snprintf(fmt, sizeof (fmt), "%s%d: %s", ddi_driver_name(dip),
ddi_get_instance(dip), f);
va_start(list, f);
vcmn_err(level, fmt, list);
va_end(list);
return (rv);
}
kmem_cache_t *
rxbuf_cache_create(struct rxbuf_cache_params *p)
{
char name[32];
(void) snprintf(name, sizeof (name), "%s%d_rxbuf_cache",
ddi_driver_name(p->dip), ddi_get_instance(p->dip));
return kmem_cache_create(name, sizeof (struct rxbuf), CACHE_LINE,
rxbuf_ctor, rxbuf_dtor, NULL, p, NULL, 0);
}
void
rxbuf_cache_destroy(kmem_cache_t *cache)
{
kmem_cache_destroy(cache);
}
/*
* If ref_cnt is more than 1 then those many calls to rxbuf_free will
* have to be made before the rxb is released back to the kmem_cache.
*/
struct rxbuf *
rxbuf_alloc(kmem_cache_t *cache, int kmflags, uint_t ref_cnt)
{
struct rxbuf *rxb;
ASSERT(ref_cnt > 0);
rxb = kmem_cache_alloc(cache, kmflags);
if (rxb != NULL) {
rxb->ref_cnt = ref_cnt;
rxb->cache = cache;
}
return (rxb);
}
/*
* This is normally called via the rxb's freefunc, when an mblk referencing the
* rxb is freed.
*/
void
rxbuf_free(struct rxbuf *rxb)
{
if (atomic_dec_uint_nv(&rxb->ref_cnt) == 0)
kmem_cache_free(rxb->cache, rxb);
}
static int
rxbuf_ctor(void *arg1, void *arg2, int kmflag)
{
struct rxbuf *rxb = arg1;
struct rxbuf_cache_params *p = arg2;
size_t real_len;
ddi_dma_cookie_t cookie;
uint_t ccount = 0;
int (*callback)(caddr_t);
int rc = ENOMEM;
if ((kmflag & KM_NOSLEEP) != 0)
callback = DDI_DMA_DONTWAIT;
else
callback = DDI_DMA_SLEEP;
rc = ddi_dma_alloc_handle(p->dip, &p->dma_attr_rx, callback, 0,
&rxb->dhdl);
if (rc != DDI_SUCCESS)
return (rc == DDI_DMA_BADATTR ? EINVAL : ENOMEM);
rc = ddi_dma_mem_alloc(rxb->dhdl, p->buf_size, &p->acc_attr_rx,
DDI_DMA_STREAMING, callback, 0, &rxb->va, &real_len, &rxb->ahdl);
if (rc != DDI_SUCCESS) {
rc = ENOMEM;
goto fail1;
}
rc = ddi_dma_addr_bind_handle(rxb->dhdl, NULL, rxb->va, p->buf_size,
DDI_DMA_READ | DDI_DMA_STREAMING, NULL, NULL, &cookie, &ccount);
if (rc != DDI_DMA_MAPPED) {
if (rc == DDI_DMA_INUSE)
rc = EBUSY;
else if (rc == DDI_DMA_TOOBIG)
rc = E2BIG;
else
rc = ENOMEM;
goto fail2;
}
if (ccount != 1) {
rc = E2BIG;
goto fail3;
}
rxb->ref_cnt = 0;
rxb->buf_size = p->buf_size;
rxb->freefunc.free_arg = (caddr_t)rxb;
rxb->freefunc.free_func = rxbuf_free;
rxb->ba = cookie.dmac_laddress;
return (0);
fail3: (void) ddi_dma_unbind_handle(rxb->dhdl);
fail2: ddi_dma_mem_free(&rxb->ahdl);
fail1: ddi_dma_free_handle(&rxb->dhdl);
return (rc);
}
/* ARGSUSED */
static void
rxbuf_dtor(void *arg1, void *arg2)
{
struct rxbuf *rxb = arg1;
(void) ddi_dma_unbind_handle(rxb->dhdl);
ddi_dma_mem_free(&rxb->ahdl);
ddi_dma_free_handle(&rxb->dhdl);
}
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