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/*
* Copyright (c) 2008-2016 Solarflare Communications 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
*
* The views and conclusions contained in the software and documentation are
* those of the authors and should not be interpreted as representing official
* policies, either expressed or implied, of the FreeBSD Project.
*/
#include <sys/ddi.h>
#include "sfxge.h"
#include "efx.h"
static int
sfxge_dma_buffer_unbind_handle(efsys_mem_t *esmp)
{
int rc;
esmp->esm_addr = 0;
rc = ddi_dma_unbind_handle(esmp->esm_dma_handle);
if (rc != DDI_SUCCESS)
goto fail1;
return (0);
fail1:
DTRACE_PROBE1(fail1, int, rc);
return (rc);
}
static void
sfxge_dma_buffer_mem_free(efsys_mem_t *esmp)
{
esmp->esm_base = NULL;
ddi_dma_mem_free(&(esmp->esm_acc_handle));
esmp->esm_acc_handle = NULL;
}
static void
sfxge_dma_buffer_handle_free(ddi_dma_handle_t *dhandlep)
{
ddi_dma_free_handle(dhandlep);
*dhandlep = NULL;
}
int
sfxge_dma_buffer_create(efsys_mem_t *esmp, const sfxge_dma_buffer_attr_t *sdbap)
{
int err;
int rc;
size_t unit;
ddi_dma_cookie_t dmac;
unsigned int ncookies;
/* Allocate a DMA handle */
err = ddi_dma_alloc_handle(sdbap->sdba_dip, sdbap->sdba_dattrp,
sdbap->sdba_callback, NULL, &(esmp->esm_dma_handle));
switch (err) {
case DDI_SUCCESS:
break;
case DDI_DMA_BADATTR:
rc = EINVAL;
goto fail1;
case DDI_DMA_NORESOURCES:
rc = ENOMEM;
goto fail1;
default:
rc = EFAULT;
goto fail1;
}
/* Allocate some DMA memory */
err = ddi_dma_mem_alloc(esmp->esm_dma_handle, sdbap->sdba_length,
sdbap->sdba_devaccp, sdbap->sdba_memflags,
sdbap->sdba_callback, NULL,
&(esmp->esm_base), &unit, &(esmp->esm_acc_handle));
switch (err) {
case DDI_SUCCESS:
break;
case DDI_FAILURE:
/*FALLTHRU*/
default:
rc = EFAULT;
goto fail2;
}
if (sdbap->sdba_zeroinit)
bzero(esmp->esm_base, sdbap->sdba_length);
/* Bind the DMA memory to the DMA handle */
/* We aren't handling partial mappings */
ASSERT3U(sdbap->sdba_bindflags & DDI_DMA_PARTIAL, !=, DDI_DMA_PARTIAL);
err = ddi_dma_addr_bind_handle(esmp->esm_dma_handle, NULL,
esmp->esm_base, sdbap->sdba_length, sdbap->sdba_bindflags,
sdbap->sdba_callback, NULL, &dmac, &ncookies);
switch (err) {
case DDI_DMA_MAPPED:
break;
case DDI_DMA_INUSE:
rc = EEXIST;
goto fail3;
case DDI_DMA_NORESOURCES:
rc = ENOMEM;
goto fail3;
case DDI_DMA_NOMAPPING:
rc = ENOTSUP;
goto fail3;
case DDI_DMA_TOOBIG:
rc = EFBIG;
goto fail3;
default:
rc = EFAULT;
goto fail3;
}
ASSERT3U(ncookies, >=, 1);
ASSERT3U(ncookies, <=, sdbap->sdba_maxcookies);
esmp->esm_addr = dmac.dmac_laddress;
esmp->esm_size = dmac.dmac_size;
DTRACE_PROBE1(addr, efsys_dma_addr_t, esmp->esm_addr);
return (0);
fail3:
DTRACE_PROBE(fail3);
sfxge_dma_buffer_mem_free(esmp);
fail2:
DTRACE_PROBE(fail2);
sfxge_dma_buffer_handle_free(&(esmp->esm_dma_handle));
esmp->esm_dma_handle = NULL;
fail1:
DTRACE_PROBE1(fail1, int, rc);
return (-1);
}
void
sfxge_dma_buffer_destroy(efsys_mem_t *esmp)
{
int rc;
rc = sfxge_dma_buffer_unbind_handle(esmp);
if (rc != 0) {
cmn_err(CE_WARN, SFXGE_CMN_ERR "DMA Unbind failed rc=%d", rc);
}
sfxge_dma_buffer_mem_free(esmp);
sfxge_dma_buffer_handle_free(&(esmp->esm_dma_handle));
}
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