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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright © 2023 Dmitry Salychev
*
* 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 AUTHOR 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 AUTHOR 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/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <machine/bus.h>
#include "dpaa2_types.h"
#include "dpaa2_buf.h"
#include "dpaa2_bp.h"
#include "dpaa2_channel.h"
#include "dpaa2_swp.h"
#include "dpaa2_swp_if.h"
#include "dpaa2_ni.h"
MALLOC_DEFINE(M_DPAA2_RXB, "dpaa2_rxb", "DPAA2 DMA-mapped buffer (Rx)");
/**
* @brief Allocate Rx buffers visible to QBMan and release them to the
* buffer pool.
*/
int
dpaa2_buf_seed_pool(device_t dev, device_t bpdev, void *arg, uint32_t count,
int size, struct mtx *dma_mtx)
{
struct dpaa2_ni_softc *sc = device_get_softc(dev);
struct dpaa2_bp_softc *bpsc = device_get_softc(bpdev);
struct dpaa2_channel *ch = (struct dpaa2_channel *)arg;
struct dpaa2_buf *buf;
const int alloc = DPAA2_ATOMIC_READ(&sc->buf_num);
const uint16_t bpid = bpsc->attr.bpid;
bus_addr_t paddr[DPAA2_SWP_BUFS_PER_CMD];
int error, bufn = 0;
#if defined(INVARIANTS)
KASSERT(ch->rx_dmat != NULL, ("%s: no DMA tag?", __func__));
if (dma_mtx != NULL) {
mtx_assert(dma_mtx, MA_OWNED);
}
#endif /* INVARIANTS */
#ifdef _notyet_
/* Limit amount of buffers released to the pool */
count = (alloc + count > DPAA2_NI_BUFS_MAX)
? DPAA2_NI_BUFS_MAX - alloc : count;
#endif
/* Release "count" buffers to the pool */
for (int i = alloc; i < alloc + count; i++) {
/* Enough buffers were allocated for a single command */
if (bufn == DPAA2_SWP_BUFS_PER_CMD) {
error = DPAA2_SWP_RELEASE_BUFS(ch->io_dev, bpid, paddr,
bufn);
if (error) {
device_printf(sc->dev, "%s: failed to release "
"buffers to the pool (1)\n", __func__);
return (error);
}
DPAA2_ATOMIC_ADD(&sc->buf_num, bufn);
bufn = 0;
}
buf = malloc(sizeof(struct dpaa2_buf), M_DPAA2_RXB, M_NOWAIT);
if (buf == NULL) {
device_printf(dev, "%s: malloc() failed\n", __func__);
return (ENOMEM);
}
DPAA2_BUF_INIT_TAGOPT(buf, ch->rx_dmat, ch);
error = dpaa2_buf_seed_rxb(dev, buf, size, dma_mtx);
if (error != 0) {
device_printf(dev, "%s: dpaa2_buf_seed_rxb() failed: "
"error=%d/n", __func__, error);
break;
}
paddr[bufn] = buf->paddr;
bufn++;
}
/* Release reminder of the buffers to the pool */
if (bufn > 0) {
error = DPAA2_SWP_RELEASE_BUFS(ch->io_dev, bpid, paddr, bufn);
if (error) {
device_printf(sc->dev, "%s: failed to release "
"buffers to the pool (2)\n", __func__);
return (error);
}
DPAA2_ATOMIC_ADD(&sc->buf_num, bufn);
}
return (0);
}
/**
* @brief Prepare Rx buffer to be released to the buffer pool.
*/
int
dpaa2_buf_seed_rxb(device_t dev, struct dpaa2_buf *buf, int size,
struct mtx *dma_mtx)
{
struct dpaa2_ni_softc *sc = device_get_softc(dev);
struct dpaa2_fa *fa;
bool map_created = false;
bool mbuf_alloc = false;
int error;
#if defined(INVARIANTS)
DPAA2_BUF_ASSERT_RXPREP(buf);
if (dma_mtx != NULL) {
mtx_assert(dma_mtx, MA_OWNED);
}
#endif /* INVARIANTS */
if (__predict_false(buf->dmap == NULL)) {
error = bus_dmamap_create(buf->dmat, 0, &buf->dmap);
if (error != 0) {
device_printf(dev, "%s: failed to create DMA map: "
"error=%d\n", __func__, error);
goto fail_map_create;
}
map_created = true;
}
if (__predict_true(buf->m == NULL)) {
buf->m = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, size);
if (__predict_false(buf->m == NULL)) {
device_printf(dev, "%s: m_getjcl() failed\n", __func__);
error = ENOMEM;
goto fail_mbuf_alloc;
}
buf->m->m_len = buf->m->m_ext.ext_size;
buf->m->m_pkthdr.len = buf->m->m_ext.ext_size;
mbuf_alloc = true;
}
error = bus_dmamap_load_mbuf_sg(buf->dmat, buf->dmap, buf->m, &buf->seg,
&buf->nseg, BUS_DMA_NOWAIT);
KASSERT(buf->nseg == 1, ("%s: one segment expected: nseg=%d", __func__,
buf->nseg));
KASSERT(error == 0, ("%s: bus_dmamap_load_mbuf_sg() failed: error=%d",
__func__, error));
if (__predict_false(error != 0 || buf->nseg != 1)) {
device_printf(sc->dev, "%s: bus_dmamap_load_mbuf_sg() failed: "
"error=%d, nsegs=%d\n", __func__, error, buf->nseg);
goto fail_mbuf_map;
}
buf->paddr = buf->seg.ds_addr;
buf->vaddr = buf->m->m_data;
/* Populate frame annotation for future use */
fa = (struct dpaa2_fa *)buf->vaddr;
fa->magic = DPAA2_MAGIC;
fa->buf = buf;
bus_dmamap_sync(buf->dmat, buf->dmap, BUS_DMASYNC_PREREAD);
DPAA2_BUF_ASSERT_RXREADY(buf);
return (0);
fail_mbuf_map:
if (mbuf_alloc) {
m_freem(buf->m);
buf->m = NULL;
}
fail_mbuf_alloc:
if (map_created) {
(void)bus_dmamap_destroy(buf->dmat, buf->dmap);
}
fail_map_create:
return (error);
}
/**
* @brief Prepare Tx buffer to be added to the Tx ring.
*/
int
dpaa2_buf_seed_txb(device_t dev, struct dpaa2_buf *buf)
{
struct dpaa2_buf *sgt = buf->sgt;
bool map_created = false;
int error;
DPAA2_BUF_ASSERT_TXPREP(buf);
if (buf->dmap == NULL) {
error = bus_dmamap_create(buf->dmat, 0, &buf->dmap);
if (error != 0) {
device_printf(dev, "%s: bus_dmamap_create() failed: "
"error=%d\n", __func__, error);
goto fail_map_create;
}
map_created = true;
}
if (sgt->vaddr == NULL) {
error = bus_dmamem_alloc(sgt->dmat, (void **)&sgt->vaddr,
BUS_DMA_ZERO | BUS_DMA_COHERENT, &sgt->dmap);
if (error != 0) {
device_printf(dev, "%s: bus_dmamem_alloc() failed: "
"error=%d\n", __func__, error);
goto fail_mem_alloc;
}
}
DPAA2_BUF_ASSERT_TXREADY(buf);
return (0);
fail_mem_alloc:
if (map_created) {
(void)bus_dmamap_destroy(buf->dmat, buf->dmap);
}
fail_map_create:
return (error);
}
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