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sys/dev/liquidio/base/lio_request_manager.c

/*
* BSD LICENSE
*
* Copyright(c) 2017 Cavium, Inc.. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Cavium, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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(S) 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.
*/
/*$FreeBSD$*/
#include "lio_bsd.h"
#include "lio_common.h"
#include "lio_droq.h"
#include "lio_iq.h"
#include "lio_response_manager.h"
#include "lio_device.h"
#include "lio_main.h"
#include "lio_network.h"
#include "cn23xx_pf_device.h"
#include "lio_rxtx.h"
struct lio_iq_post_status {
int status;
int index;
};
static void lio_check_db_timeout(void *arg, int pending);
static void __lio_check_db_timeout(struct octeon_device *oct,
uint64_t iq_no);
/* Return 0 on success, 1 on failure */
int
lio_init_instr_queue(struct octeon_device *oct, union octeon_txpciq txpciq,
uint32_t num_descs)
{
struct lio_instr_queue *iq;
struct lio_iq_config *conf = NULL;
struct lio_tq *db_tq;
struct lio_request_list *request_buf;
bus_size_t max_size;
uint32_t iq_no = (uint32_t)txpciq.s.q_no;
uint32_t q_size;
int error, i;
if (LIO_CN23XX_PF(oct))
conf = &(LIO_GET_IQ_CFG(LIO_CHIP_CONF(oct, cn23xx_pf)));
if (conf == NULL) {
lio_dev_err(oct, "Unsupported Chip %x\n", oct->chip_id);
return (1);
}
q_size = (uint32_t)conf->instr_type * num_descs;
iq = oct->instr_queue[iq_no];
iq->oct_dev = oct;
max_size = LIO_CN23XX_PKI_MAX_FRAME_SIZE * num_descs;
error = bus_dma_tag_create(bus_get_dma_tag(oct->device), /* parent */
1, 0, /* alignment, bounds */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
max_size, /* maxsize */
LIO_MAX_SG, /* nsegments */
PAGE_SIZE, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockfuncarg */
&iq->txtag);
if (error) {
lio_dev_err(oct, "Cannot allocate memory for instr queue %d\n",
iq_no);
return (1);
}
iq->base_addr = lio_dma_alloc(q_size, (vm_paddr_t *)&iq->base_addr_dma);
if (!iq->base_addr) {
lio_dev_err(oct, "Cannot allocate memory for instr queue %d\n",
iq_no);
return (1);
}
iq->max_count = num_descs;
/*
* Initialize a list to holds requests that have been posted to
* Octeon but has yet to be fetched by octeon
*/
iq->request_list = malloc(sizeof(*iq->request_list) * num_descs,
M_DEVBUF, M_NOWAIT | M_ZERO);
if (iq->request_list == NULL) {
lio_dev_err(oct, "Alloc failed for IQ[%d] nr free list\n",
iq_no);
return (1);
}
lio_dev_dbg(oct, "IQ[%d]: base: %p basedma: %llx count: %d\n",
iq_no, iq->base_addr, LIO_CAST64(iq->base_addr_dma),
iq->max_count);
/* Create the descriptor buffer dma maps */
request_buf = iq->request_list;
for (i = 0; i < num_descs; i++, request_buf++) {
error = bus_dmamap_create(iq->txtag, 0, &request_buf->map);
if (error) {
lio_dev_err(oct, "Unable to create TX DMA map\n");
return (1);
}
}
iq->txpciq.txpciq64 = txpciq.txpciq64;
iq->fill_cnt = 0;
iq->host_write_index = 0;
iq->octeon_read_index = 0;
iq->flush_index = 0;
iq->last_db_time = 0;
iq->db_timeout = (uint32_t)conf->db_timeout;
atomic_store_rel_int(&iq->instr_pending, 0);
/* Initialize the lock for this instruction queue */
mtx_init(&iq->lock, "Tx_lock", NULL, MTX_DEF);
mtx_init(&iq->post_lock, "iq_post_lock", NULL, MTX_DEF);
mtx_init(&iq->enq_lock, "enq_lock", NULL, MTX_DEF);
mtx_init(&iq->iq_flush_running_lock, "iq_flush_running_lock", NULL,
MTX_DEF);
oct->io_qmask.iq |= BIT_ULL(iq_no);
/* Set the 32B/64B mode for each input queue */
oct->io_qmask.iq64B |= ((conf->instr_type == 64) << iq_no);
iq->iqcmd_64B = (conf->instr_type == 64);
oct->fn_list.setup_iq_regs(oct, iq_no);
db_tq = &oct->check_db_tq[iq_no];
db_tq->tq = taskqueue_create("lio_check_db_timeout", M_WAITOK,
taskqueue_thread_enqueue, &db_tq->tq);
if (db_tq->tq == NULL) {
lio_dev_err(oct, "check db wq create failed for iq %d\n",
iq_no);
return (1);
}
TIMEOUT_TASK_INIT(db_tq->tq, &db_tq->work, 0, lio_check_db_timeout,
(void *)db_tq);
db_tq->ctxul = iq_no;
db_tq->ctxptr = oct;
taskqueue_start_threads(&db_tq->tq, 1, PI_NET,
"lio%d_check_db_timeout:%d",
oct->octeon_id, iq_no);
taskqueue_enqueue_timeout(db_tq->tq, &db_tq->work, 1);
/* Allocate a buf ring */
oct->instr_queue[iq_no]->br =
buf_ring_alloc(LIO_BR_SIZE, M_DEVBUF, M_WAITOK,
&oct->instr_queue[iq_no]->enq_lock);
if (oct->instr_queue[iq_no]->br == NULL) {
lio_dev_err(oct, "Critical Failure setting up buf ring\n");
return (1);
}
return (0);
}
int
lio_delete_instr_queue(struct octeon_device *oct, uint32_t iq_no)
{
struct lio_instr_queue *iq = oct->instr_queue[iq_no];
struct lio_request_list *request_buf;
struct lio_mbuf_free_info *finfo;
uint64_t desc_size = 0, q_size;
int i;
lio_dev_dbg(oct, "%s[%d]\n", __func__, iq_no);
if (oct->check_db_tq[iq_no].tq != NULL) {
while (taskqueue_cancel_timeout(oct->check_db_tq[iq_no].tq,
&oct->check_db_tq[iq_no].work,
NULL))
taskqueue_drain_timeout(oct->check_db_tq[iq_no].tq,
&oct->check_db_tq[iq_no].work);
taskqueue_free(oct->check_db_tq[iq_no].tq);
oct->check_db_tq[iq_no].tq = NULL;
}
if (LIO_CN23XX_PF(oct))
desc_size =
LIO_GET_IQ_INSTR_TYPE_CFG(LIO_CHIP_CONF(oct, cn23xx_pf));
request_buf = iq->request_list;
for (i = 0; i < iq->max_count; i++, request_buf++) {
if ((request_buf->reqtype == LIO_REQTYPE_NORESP_NET) ||
(request_buf->reqtype == LIO_REQTYPE_NORESP_NET_SG)) {
if (request_buf->buf != NULL) {
finfo = request_buf->buf;
bus_dmamap_sync(iq->txtag, request_buf->map,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(iq->txtag,
request_buf->map);
m_freem(finfo->mb);
request_buf->buf = NULL;
if (request_buf->map != NULL) {
bus_dmamap_destroy(iq->txtag,
request_buf->map);
request_buf->map = NULL;
}
} else if (request_buf->map != NULL) {
bus_dmamap_unload(iq->txtag, request_buf->map);
bus_dmamap_destroy(iq->txtag, request_buf->map);
request_buf->map = NULL;
}
}
}
if (iq->br != NULL) {
buf_ring_free(iq->br, M_DEVBUF);
iq->br = NULL;
}
if (iq->request_list != NULL) {
free(iq->request_list, M_DEVBUF);
iq->request_list = NULL;
}
if (iq->txtag != NULL) {
bus_dma_tag_destroy(iq->txtag);
iq->txtag = NULL;
}
if (iq->base_addr) {
q_size = iq->max_count * desc_size;
lio_dma_free((uint32_t)q_size, iq->base_addr);
oct->io_qmask.iq &= ~(1ULL << iq_no);
bzero(oct->instr_queue[iq_no], sizeof(struct lio_instr_queue));
oct->num_iqs--;
return (0);
}
return (1);
}
/* Return 0 on success, 1 on failure */
int
lio_setup_iq(struct octeon_device *oct, int ifidx, int q_index,
union octeon_txpciq txpciq, uint32_t num_descs)
{
uint32_t iq_no = (uint32_t)txpciq.s.q_no;
if (oct->instr_queue[iq_no]->oct_dev != NULL) {
lio_dev_dbg(oct, "IQ is in use. Cannot create the IQ: %d again\n",
iq_no);
oct->instr_queue[iq_no]->txpciq.txpciq64 = txpciq.txpciq64;
return (0);
}
oct->instr_queue[iq_no]->q_index = q_index;
oct->instr_queue[iq_no]->ifidx = ifidx;
if (lio_init_instr_queue(oct, txpciq, num_descs)) {
lio_delete_instr_queue(oct, iq_no);
return (1);
}
oct->num_iqs++;
if (oct->fn_list.enable_io_queues(oct))
return (1);
return (0);
}
int
lio_wait_for_instr_fetch(struct octeon_device *oct)
{
int i, retry = 1000, pending, instr_cnt = 0;
do {
instr_cnt = 0;
for (i = 0; i < LIO_MAX_INSTR_QUEUES(oct); i++) {
if (!(oct->io_qmask.iq & BIT_ULL(i)))
continue;
pending = atomic_load_acq_int(
&oct->instr_queue[i]->instr_pending);
if (pending)
__lio_check_db_timeout(oct, i);
instr_cnt += pending;
}
if (instr_cnt == 0)
break;
lio_sleep_timeout(1);
} while (retry-- && instr_cnt);
return (instr_cnt);
}
static inline void
lio_ring_doorbell(struct octeon_device *oct, struct lio_instr_queue *iq)
{
if (atomic_load_acq_int(&oct->status) == LIO_DEV_RUNNING) {
lio_write_csr32(oct, iq->doorbell_reg, iq->fill_cnt);
/* make sure doorbell write goes through */
__compiler_membar();
iq->fill_cnt = 0;
iq->last_db_time = ticks;
return;
}
}
static inline void
__lio_copy_cmd_into_iq(struct lio_instr_queue *iq, uint8_t *cmd)
{
uint8_t *iqptr, cmdsize;
cmdsize = ((iq->iqcmd_64B) ? 64 : 32);
iqptr = iq->base_addr + (cmdsize * iq->host_write_index);
memcpy(iqptr, cmd, cmdsize);
}
static inline struct lio_iq_post_status
__lio_post_command2(struct lio_instr_queue *iq, uint8_t *cmd)
{
struct lio_iq_post_status st;
st.status = LIO_IQ_SEND_OK;
/*
* This ensures that the read index does not wrap around to the same
* position if queue gets full before Octeon could fetch any instr.
*/
if (atomic_load_acq_int(&iq->instr_pending) >=
(int32_t)(iq->max_count - 1)) {
st.status = LIO_IQ_SEND_FAILED;
st.index = -1;
return (st);
}
if (atomic_load_acq_int(&iq->instr_pending) >=
(int32_t)(iq->max_count - 2))
st.status = LIO_IQ_SEND_STOP;
__lio_copy_cmd_into_iq(iq, cmd);
/* "index" is returned, host_write_index is modified. */
st.index = iq->host_write_index;
iq->host_write_index = lio_incr_index(iq->host_write_index, 1,
iq->max_count);
iq->fill_cnt++;
/*
* Flush the command into memory. We need to be sure the data is in
* memory before indicating that the instruction is pending.
*/
wmb();
atomic_add_int(&iq->instr_pending, 1);
return (st);
}
static inline void
__lio_add_to_request_list(struct lio_instr_queue *iq, int idx, void *buf,
int reqtype)
{
iq->request_list[idx].buf = buf;
iq->request_list[idx].reqtype = reqtype;
}
/* Can only run in process context */
int
lio_process_iq_request_list(struct octeon_device *oct,
struct lio_instr_queue *iq, uint32_t budget)
{
struct lio_soft_command *sc;
struct octeon_instr_irh *irh = NULL;
struct lio_mbuf_free_info *finfo;
void *buf;
uint32_t inst_count = 0;
uint32_t old = iq->flush_index;
int reqtype;
while (old != iq->octeon_read_index) {
reqtype = iq->request_list[old].reqtype;
buf = iq->request_list[old].buf;
finfo = buf;
if (reqtype == LIO_REQTYPE_NONE)
goto skip_this;
switch (reqtype) {
case LIO_REQTYPE_NORESP_NET:
lio_free_mbuf(iq, buf);
break;
case LIO_REQTYPE_NORESP_NET_SG:
lio_free_sgmbuf(iq, buf);
break;
case LIO_REQTYPE_RESP_NET:
case LIO_REQTYPE_SOFT_COMMAND:
sc = buf;
if (LIO_CN23XX_PF(oct))
irh = (struct octeon_instr_irh *)
&sc->cmd.cmd3.irh;
if (irh->rflag) {
/*
* We're expecting a response from Octeon.
* It's up to lio_process_ordered_list() to
* process sc. Add sc to the ordered soft
* command response list because we expect
* a response from Octeon.
*/
mtx_lock(&oct->response_list
[LIO_ORDERED_SC_LIST].lock);
atomic_add_int(&oct->response_list
[LIO_ORDERED_SC_LIST].
pending_req_count, 1);
STAILQ_INSERT_TAIL(&oct->response_list
[LIO_ORDERED_SC_LIST].
head, &sc->node, entries);
mtx_unlock(&oct->response_list
[LIO_ORDERED_SC_LIST].lock);
} else {
if (sc->callback != NULL) {
/* This callback must not sleep */
sc->callback(oct, LIO_REQUEST_DONE,
sc->callback_arg);
}
}
break;
default:
lio_dev_err(oct, "%s Unknown reqtype: %d buf: %p at idx %d\n",
__func__, reqtype, buf, old);
}
iq->request_list[old].buf = NULL;
iq->request_list[old].reqtype = 0;
skip_this:
inst_count++;
old = lio_incr_index(old, 1, iq->max_count);
if ((budget) && (inst_count >= budget))
break;
}
iq->flush_index = old;
return (inst_count);
}
/* Can only be called from process context */
int
lio_flush_iq(struct octeon_device *oct, struct lio_instr_queue *iq,
uint32_t budget)
{
uint32_t inst_processed = 0;
uint32_t tot_inst_processed = 0;
int tx_done = 1;
if (!mtx_trylock(&iq->iq_flush_running_lock))
return (tx_done);
mtx_lock(&iq->lock);
iq->octeon_read_index = oct->fn_list.update_iq_read_idx(iq);
do {
/* Process any outstanding IQ packets. */
if (iq->flush_index == iq->octeon_read_index)
break;
if (budget)
inst_processed =
lio_process_iq_request_list(oct, iq,
budget -
tot_inst_processed);
else
inst_processed =
lio_process_iq_request_list(oct, iq, 0);
if (inst_processed) {
atomic_subtract_int(&iq->instr_pending, inst_processed);
iq->stats.instr_processed += inst_processed;
}
tot_inst_processed += inst_processed;
inst_processed = 0;
} while (tot_inst_processed < budget);
if (budget && (tot_inst_processed >= budget))
tx_done = 0;
iq->last_db_time = ticks;
mtx_unlock(&iq->lock);
mtx_unlock(&iq->iq_flush_running_lock);
return (tx_done);
}
/*
* Process instruction queue after timeout.
* This routine gets called from a taskqueue or when removing the module.
*/
static void
__lio_check_db_timeout(struct octeon_device *oct, uint64_t iq_no)
{
struct lio_instr_queue *iq;
uint64_t next_time;
if (oct == NULL)
return;
iq = oct->instr_queue[iq_no];
if (iq == NULL)
return;
if (atomic_load_acq_int(&iq->instr_pending)) {
/* If ticks - last_db_time < db_timeout do nothing */
next_time = iq->last_db_time + lio_ms_to_ticks(iq->db_timeout);
if (!lio_check_timeout(ticks, next_time))
return;
iq->last_db_time = ticks;
/* Flush the instruction queue */
lio_flush_iq(oct, iq, 0);
lio_enable_irq(NULL, iq);
}
if (oct->props.ifp != NULL && iq->br != NULL) {
if (mtx_trylock(&iq->enq_lock)) {
if (!drbr_empty(oct->props.ifp, iq->br))
lio_mq_start_locked(oct->props.ifp, iq);
mtx_unlock(&iq->enq_lock);
}
}
}
/*
* Called by the Poll thread at regular intervals to check the instruction
* queue for commands to be posted and for commands that were fetched by Octeon.
*/
static void
lio_check_db_timeout(void *arg, int pending)
{
struct lio_tq *db_tq = (struct lio_tq *)arg;
struct octeon_device *oct = db_tq->ctxptr;
uint64_t iq_no = db_tq->ctxul;
uint32_t delay = 10;
__lio_check_db_timeout(oct, iq_no);
taskqueue_enqueue_timeout(db_tq->tq, &db_tq->work,
lio_ms_to_ticks(delay));
}
int
lio_send_command(struct octeon_device *oct, uint32_t iq_no,
uint32_t force_db, void *cmd, void *buf,
uint32_t datasize, uint32_t reqtype)
{
struct lio_iq_post_status st;
struct lio_instr_queue *iq = oct->instr_queue[iq_no];
/*
* Get the lock and prevent other tasks and tx interrupt handler
* from running.
*/
mtx_lock(&iq->post_lock);
st = __lio_post_command2(iq, cmd);
if (st.status != LIO_IQ_SEND_FAILED) {
__lio_add_to_request_list(iq, st.index, buf, reqtype);
LIO_INCR_INSTRQUEUE_PKT_COUNT(oct, iq_no, bytes_sent, datasize);
LIO_INCR_INSTRQUEUE_PKT_COUNT(oct, iq_no, instr_posted, 1);
if (force_db || (st.status == LIO_IQ_SEND_STOP))
lio_ring_doorbell(oct, iq);
} else {
LIO_INCR_INSTRQUEUE_PKT_COUNT(oct, iq_no, instr_dropped, 1);
}
mtx_unlock(&iq->post_lock);
/*
* This is only done here to expedite packets being flushed for
* cases where there are no IQ completion interrupts.
*/
return (st.status);
}
void
lio_prepare_soft_command(struct octeon_device *oct, struct lio_soft_command *sc,
uint8_t opcode, uint8_t subcode, uint32_t irh_ossp,
uint64_t ossp0, uint64_t ossp1)
{
struct lio_config *lio_cfg;
struct octeon_instr_ih3 *ih3;
struct octeon_instr_pki_ih3 *pki_ih3;
struct octeon_instr_irh *irh;
struct octeon_instr_rdp *rdp;
KASSERT(opcode <= 15, ("%s, %d, opcode > 15", __func__, __LINE__));
KASSERT(subcode <= 127, ("%s, %d, opcode > 127", __func__, __LINE__));
lio_cfg = lio_get_conf(oct);
if (LIO_CN23XX_PF(oct)) {
ih3 = (struct octeon_instr_ih3 *)&sc->cmd.cmd3.ih3;
ih3->pkind = oct->instr_queue[sc->iq_no]->txpciq.s.pkind;
pki_ih3 = (struct octeon_instr_pki_ih3 *)&sc->cmd.cmd3.pki_ih3;
pki_ih3->w = 1;
pki_ih3->raw = 1;
pki_ih3->utag = 1;
pki_ih3->uqpg = oct->instr_queue[sc->iq_no]->txpciq.s.use_qpg;
pki_ih3->utt = 1;
pki_ih3->tag = LIO_CONTROL;
pki_ih3->tagtype = LIO_ATOMIC_TAG;
pki_ih3->qpg = oct->instr_queue[sc->iq_no]->txpciq.s.qpg;
pki_ih3->pm = 0x7;
pki_ih3->sl = 8;
if (sc->datasize)
ih3->dlengsz = sc->datasize;
irh = (struct octeon_instr_irh *)&sc->cmd.cmd3.irh;
irh->opcode = opcode;
irh->subcode = subcode;
/* opcode/subcode specific parameters (ossp) */
irh->ossp = irh_ossp;
sc->cmd.cmd3.ossp[0] = ossp0;
sc->cmd.cmd3.ossp[1] = ossp1;
if (sc->rdatasize) {
rdp = (struct octeon_instr_rdp *)&sc->cmd.cmd3.rdp;
rdp->pcie_port = oct->pcie_port;
rdp->rlen = sc->rdatasize;
irh->rflag = 1;
/* PKI IH3 */
/* pki_ih3 irh+ossp[0]+ossp[1]+rdp+rptr = 48 bytes */
ih3->fsz = LIO_SOFTCMDRESP_IH3;
} else {
irh->rflag = 0;
/* PKI IH3 */
/* pki_h3 + irh + ossp[0] + ossp[1] = 32 bytes */
ih3->fsz = LIO_PCICMD_O3;
}
}
}
int
lio_send_soft_command(struct octeon_device *oct, struct lio_soft_command *sc)
{
struct octeon_instr_ih3 *ih3;
struct octeon_instr_irh *irh;
uint32_t len = 0;
if (LIO_CN23XX_PF(oct)) {
ih3 = (struct octeon_instr_ih3 *)&sc->cmd.cmd3.ih3;
if (ih3->dlengsz) {
KASSERT(sc->dmadptr, ("%s, %d, sc->dmadptr is NULL",
__func__, __LINE__));
sc->cmd.cmd3.dptr = sc->dmadptr;
}
irh = (struct octeon_instr_irh *)&sc->cmd.cmd3.irh;
if (irh->rflag) {
KASSERT(sc->dmarptr, ("%s, %d, sc->dmarptr is NULL",
__func__, __LINE__));
KASSERT(sc->status_word, ("%s, %d, sc->status_word is NULL",
__func__, __LINE__));
*sc->status_word = COMPLETION_WORD_INIT;
sc->cmd.cmd3.rptr = sc->dmarptr;
}
len = (uint32_t)ih3->dlengsz;
}
if (sc->wait_time)
sc->timeout = ticks + lio_ms_to_ticks(sc->wait_time);
return (lio_send_command(oct, sc->iq_no, 1, &sc->cmd, sc,
len, LIO_REQTYPE_SOFT_COMMAND));
}
int
lio_setup_sc_buffer_pool(struct octeon_device *oct)
{
struct lio_soft_command *sc;
uint64_t dma_addr;
int i;
STAILQ_INIT(&oct->sc_buf_pool.head);
mtx_init(&oct->sc_buf_pool.lock, "sc_pool_lock", NULL, MTX_DEF);
atomic_store_rel_int(&oct->sc_buf_pool.alloc_buf_count, 0);
for (i = 0; i < LIO_MAX_SOFT_COMMAND_BUFFERS; i++) {
sc = (struct lio_soft_command *)
lio_dma_alloc(LIO_SOFT_COMMAND_BUFFER_SIZE, (vm_paddr_t *)&dma_addr);
if (sc == NULL) {
lio_free_sc_buffer_pool(oct);
return (1);
}
sc->dma_addr = dma_addr;
sc->size = LIO_SOFT_COMMAND_BUFFER_SIZE;
STAILQ_INSERT_TAIL(&oct->sc_buf_pool.head, &sc->node, entries);
}
return (0);
}
int
lio_free_sc_buffer_pool(struct octeon_device *oct)
{
struct lio_stailq_node *tmp, *tmp2;
struct lio_soft_command *sc;
mtx_lock(&oct->sc_buf_pool.lock);
STAILQ_FOREACH_SAFE(tmp, &oct->sc_buf_pool.head, entries, tmp2) {
sc = LIO_STAILQ_FIRST_ENTRY(&oct->sc_buf_pool.head,
struct lio_soft_command, node);
STAILQ_REMOVE_HEAD(&oct->sc_buf_pool.head, entries);
lio_dma_free(sc->size, sc);
}
STAILQ_INIT(&oct->sc_buf_pool.head);
mtx_unlock(&oct->sc_buf_pool.lock);
return (0);
}
struct lio_soft_command *
lio_alloc_soft_command(struct octeon_device *oct, uint32_t datasize,
uint32_t rdatasize, uint32_t ctxsize)
{
struct lio_soft_command *sc = NULL;
struct lio_stailq_node *tmp;
uint64_t dma_addr;
uint32_t size;
uint32_t offset = sizeof(struct lio_soft_command);
KASSERT((offset + datasize + rdatasize + ctxsize) <=
LIO_SOFT_COMMAND_BUFFER_SIZE,
("%s, %d, offset + datasize + rdatasize + ctxsize > LIO_SOFT_COMMAND_BUFFER_SIZE",
__func__, __LINE__));
mtx_lock(&oct->sc_buf_pool.lock);
if (STAILQ_EMPTY(&oct->sc_buf_pool.head)) {
mtx_unlock(&oct->sc_buf_pool.lock);
return (NULL);
}
tmp = STAILQ_LAST(&oct->sc_buf_pool.head, lio_stailq_node, entries);
STAILQ_REMOVE(&oct->sc_buf_pool.head, tmp, lio_stailq_node, entries);
atomic_add_int(&oct->sc_buf_pool.alloc_buf_count, 1);
mtx_unlock(&oct->sc_buf_pool.lock);
sc = (struct lio_soft_command *)tmp;
dma_addr = sc->dma_addr;
size = sc->size;
bzero(sc, sc->size);
sc->dma_addr = dma_addr;
sc->size = size;
if (ctxsize) {
sc->ctxptr = (uint8_t *)sc + offset;
sc->ctxsize = ctxsize;
}
/* Start data at 128 byte boundary */
offset = (offset + ctxsize + 127) & 0xffffff80;
if (datasize) {
sc->virtdptr = (uint8_t *)sc + offset;
sc->dmadptr = dma_addr + offset;
sc->datasize = datasize;
}
/* Start rdata at 128 byte boundary */
offset = (offset + datasize + 127) & 0xffffff80;
if (rdatasize) {
KASSERT(rdatasize >= 16, ("%s, %d, rdatasize < 16", __func__,
__LINE__));
sc->virtrptr = (uint8_t *)sc + offset;
sc->dmarptr = dma_addr + offset;
sc->rdatasize = rdatasize;
sc->status_word = (uint64_t *)((uint8_t *)(sc->virtrptr) +
rdatasize - 8);
}
return (sc);
}
void
lio_free_soft_command(struct octeon_device *oct,
struct lio_soft_command *sc)
{
mtx_lock(&oct->sc_buf_pool.lock);
STAILQ_INSERT_TAIL(&oct->sc_buf_pool.head, &sc->node, entries);
atomic_subtract_int(&oct->sc_buf_pool.alloc_buf_count, 1);
mtx_unlock(&oct->sc_buf_pool.lock);
}