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/*
* Copyright (C) 2007 VMware, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of the Common
* Development and Distribution License (the "License") version 1.0
* and no later version. You may not use this file except in
* compliance with the License.
*
* You can obtain a copy of the License at
* http://www.opensource.org/licenses/cddl1.php
*
* See the License for the specific language governing permissions
* and limitations under the License.
*/
/*
* Copyright (c) 2016 by Delphix. All rights reserved.
*/
#include <vmxnet3.h>
/* Used by ddi_regs_map_setup() and ddi_dma_mem_alloc() */
ddi_device_acc_attr_t vmxnet3_dev_attr = {
DDI_DEVICE_ATTR_V0,
DDI_STRUCTURE_LE_ACC,
DDI_STRICTORDER_ACC
};
/* Buffers with no alignment constraint DMA description */
static ddi_dma_attr_t vmxnet3_dma_attrs_1 = {
.dma_attr_version = DMA_ATTR_V0,
.dma_attr_addr_lo = 0x0000000000000000ull,
.dma_attr_addr_hi = 0xFFFFFFFFFFFFFFFFull,
.dma_attr_count_max = 0xFFFFFFFFFFFFFFFFull,
.dma_attr_align = 0x0000000000000001ull,
.dma_attr_burstsizes = 0x0000000000000001ull,
.dma_attr_minxfer = 0x00000001,
.dma_attr_maxxfer = 0xFFFFFFFFFFFFFFFFull,
.dma_attr_seg = 0xFFFFFFFFFFFFFFFFull,
.dma_attr_sgllen = 1,
.dma_attr_granular = 0x00000001,
.dma_attr_flags = 0
};
/* Buffers with a 128-bytes alignment constraint DMA description */
static ddi_dma_attr_t vmxnet3_dma_attrs_128 = {
.dma_attr_version = DMA_ATTR_V0,
.dma_attr_addr_lo = 0x0000000000000000ull,
.dma_attr_addr_hi = 0xFFFFFFFFFFFFFFFFull,
.dma_attr_count_max = 0xFFFFFFFFFFFFFFFFull,
.dma_attr_align = 0x0000000000000080ull,
.dma_attr_burstsizes = 0x0000000000000001ull,
.dma_attr_minxfer = 0x00000001,
.dma_attr_maxxfer = 0xFFFFFFFFFFFFFFFFull,
.dma_attr_seg = 0xFFFFFFFFFFFFFFFFull,
.dma_attr_sgllen = 1,
.dma_attr_granular = 0x00000001,
.dma_attr_flags = 0
};
/* Buffers with a 512-bytes alignment constraint DMA description */
static ddi_dma_attr_t vmxnet3_dma_attrs_512 = {
.dma_attr_version = DMA_ATTR_V0,
.dma_attr_addr_lo = 0x0000000000000000ull,
.dma_attr_addr_hi = 0xFFFFFFFFFFFFFFFFull,
.dma_attr_count_max = 0xFFFFFFFFFFFFFFFFull,
.dma_attr_align = 0x0000000000000200ull,
.dma_attr_burstsizes = 0x0000000000000001ull,
.dma_attr_minxfer = 0x00000001,
.dma_attr_maxxfer = 0xFFFFFFFFFFFFFFFFull,
.dma_attr_seg = 0xFFFFFFFFFFFFFFFFull,
.dma_attr_sgllen = 1,
.dma_attr_granular = 0x00000001,
.dma_attr_flags = 0
};
int
vmxnet3_dmaerr2errno(int dmaerr)
{
int err;
switch (dmaerr) {
case DDI_DMA_NORESOURCES:
case DDI_DMA_TOOBIG:
err = ENOMEM;
break;
case DDI_DMA_INUSE:
err = EBUSY;
break;
case DDI_DMA_BADATTR:
case DDI_DMA_NOMAPPING:
default:
err = EINVAL;
}
return (err);
}
/*
* Allocate /size/ bytes of contiguous DMA-ble memory.
*
* Returns:
* 0 on success, non-zero on failure.
*/
static int
vmxnet3_alloc_dma_mem(vmxnet3_softc_t *dp, vmxnet3_dmabuf_t *dma, size_t size,
boolean_t canSleep, ddi_dma_attr_t *dma_attrs)
{
ddi_dma_cookie_t cookie;
uint_t cookieCount;
int dmaerr, err = 0;
int (*cb) (caddr_t) = canSleep ? DDI_DMA_SLEEP : DDI_DMA_DONTWAIT;
ASSERT(size != 0);
/*
* Allocate a DMA handle
*/
if ((dmaerr = ddi_dma_alloc_handle(dp->dip, dma_attrs, cb, NULL,
&dma->dmaHandle)) != DDI_SUCCESS) {
VMXNET3_WARN(dp, "ddi_dma_alloc_handle() failed: %d", dmaerr);
err = vmxnet3_dmaerr2errno(dmaerr);
goto error;
}
/*
* Allocate memory
*/
if (ddi_dma_mem_alloc(dma->dmaHandle, size, &vmxnet3_dev_attr,
DDI_DMA_CONSISTENT, cb, NULL, &dma->buf, &dma->bufLen,
&dma->dataHandle) != DDI_SUCCESS) {
VMXNET3_WARN(dp, "ddi_dma_mem_alloc() failed");
err = ENOMEM;
goto error_dma_handle;
}
/*
* Map the memory
*/
if ((dmaerr = ddi_dma_addr_bind_handle(dma->dmaHandle, NULL, dma->buf,
dma->bufLen, DDI_DMA_RDWR | DDI_DMA_STREAMING, cb, NULL, &cookie,
&cookieCount)) != DDI_DMA_MAPPED) {
VMXNET3_WARN(dp, "ddi_dma_addr_bind_handle() failed: %d",
dmaerr);
err = vmxnet3_dmaerr2errno(dmaerr);
goto error_dma_mem;
}
ASSERT(cookieCount == 1);
dma->bufPA = cookie.dmac_laddress;
return (0);
error_dma_mem:
ddi_dma_mem_free(&dma->dataHandle);
error_dma_handle:
ddi_dma_free_handle(&dma->dmaHandle);
error:
dma->buf = NULL;
dma->bufPA = 0;
dma->bufLen = 0;
return (err);
}
int
vmxnet3_alloc_dma_mem_1(vmxnet3_softc_t *dp, vmxnet3_dmabuf_t *dma, size_t size,
boolean_t canSleep)
{
return (vmxnet3_alloc_dma_mem(dp, dma, size, canSleep,
&vmxnet3_dma_attrs_1));
}
int
vmxnet3_alloc_dma_mem_512(vmxnet3_softc_t *dp, vmxnet3_dmabuf_t *dma,
size_t size, boolean_t canSleep)
{
return (vmxnet3_alloc_dma_mem(dp, dma, size, canSleep,
&vmxnet3_dma_attrs_512));
}
int
vmxnet3_alloc_dma_mem_128(vmxnet3_softc_t *dp, vmxnet3_dmabuf_t *dma,
size_t size, boolean_t canSleep)
{
return (vmxnet3_alloc_dma_mem(dp, dma, size, canSleep,
&vmxnet3_dma_attrs_128));
}
/*
* Free DMA-ble memory.
*/
void
vmxnet3_free_dma_mem(vmxnet3_dmabuf_t *dma)
{
(void) ddi_dma_unbind_handle(dma->dmaHandle);
ddi_dma_mem_free(&dma->dataHandle);
ddi_dma_free_handle(&dma->dmaHandle);
dma->buf = NULL;
dma->bufPA = 0;
dma->bufLen = 0;
}
/*
* Get the numeric value of the property "name" in vmxnet3s.conf for
* the corresponding device instance.
* If the property isn't found or if it doesn't satisfy the conditions,
* "def" is returned.
*
* Returns:
* The value of the property or "def".
*/
int
vmxnet3_getprop(vmxnet3_softc_t *dp, char *name, int min, int max, int def)
{
int ret = def;
int *props;
uint_t nprops;
if (ddi_prop_lookup_int_array(DDI_DEV_T_ANY, dp->dip, DDI_PROP_DONTPASS,
name, &props, &nprops) == DDI_PROP_SUCCESS) {
if (dp->instance < nprops) {
ret = props[dp->instance];
} else {
VMXNET3_WARN(dp, "property %s not available for this "
"device\n", name);
}
ddi_prop_free(props);
}
if (ret < min || ret > max) {
ASSERT(def >= min && def <= max);
VMXNET3_WARN(dp, "property %s invalid (%d <= %d <= %d)\n",
name, min, ret, max);
ret = def;
}
VMXNET3_DEBUG(dp, 2, "getprop(%s) -> %d\n", name, ret);
return (ret);
}
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