linux/drivers/net/ethernet/brocade/bna/bfa_msgq.c

670 lines
15 KiB
C

/*
* Linux network driver for Brocade Converged Network Adapter.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License (GPL) Version 2 as
* published by the Free Software Foundation
*
* 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 GNU
* General Public License for more details.
*/
/*
* Copyright (c) 2005-2011 Brocade Communications Systems, Inc.
* All rights reserved
* www.brocade.com
*/
/**
* @file bfa_msgq.c MSGQ module source file.
*/
#include "bfi.h"
#include "bfa_msgq.h"
#include "bfa_ioc.h"
#define call_cmdq_ent_cbfn(_cmdq_ent, _status) \
{ \
bfa_msgq_cmdcbfn_t cbfn; \
void *cbarg; \
cbfn = (_cmdq_ent)->cbfn; \
cbarg = (_cmdq_ent)->cbarg; \
(_cmdq_ent)->cbfn = NULL; \
(_cmdq_ent)->cbarg = NULL; \
if (cbfn) { \
cbfn(cbarg, (_status)); \
} \
}
static void bfa_msgq_cmdq_dbell(struct bfa_msgq_cmdq *cmdq);
static void bfa_msgq_cmdq_copy_rsp(struct bfa_msgq_cmdq *cmdq);
enum cmdq_event {
CMDQ_E_START = 1,
CMDQ_E_STOP = 2,
CMDQ_E_FAIL = 3,
CMDQ_E_POST = 4,
CMDQ_E_INIT_RESP = 5,
CMDQ_E_DB_READY = 6,
};
bfa_fsm_state_decl(cmdq, stopped, struct bfa_msgq_cmdq, enum cmdq_event);
bfa_fsm_state_decl(cmdq, init_wait, struct bfa_msgq_cmdq, enum cmdq_event);
bfa_fsm_state_decl(cmdq, ready, struct bfa_msgq_cmdq, enum cmdq_event);
bfa_fsm_state_decl(cmdq, dbell_wait, struct bfa_msgq_cmdq,
enum cmdq_event);
static void
cmdq_sm_stopped_entry(struct bfa_msgq_cmdq *cmdq)
{
struct bfa_msgq_cmd_entry *cmdq_ent;
cmdq->producer_index = 0;
cmdq->consumer_index = 0;
cmdq->flags = 0;
cmdq->token = 0;
cmdq->offset = 0;
cmdq->bytes_to_copy = 0;
while (!list_empty(&cmdq->pending_q)) {
bfa_q_deq(&cmdq->pending_q, &cmdq_ent);
bfa_q_qe_init(&cmdq_ent->qe);
call_cmdq_ent_cbfn(cmdq_ent, BFA_STATUS_FAILED);
}
}
static void
cmdq_sm_stopped(struct bfa_msgq_cmdq *cmdq, enum cmdq_event event)
{
switch (event) {
case CMDQ_E_START:
bfa_fsm_set_state(cmdq, cmdq_sm_init_wait);
break;
case CMDQ_E_STOP:
case CMDQ_E_FAIL:
/* No-op */
break;
case CMDQ_E_POST:
cmdq->flags |= BFA_MSGQ_CMDQ_F_DB_UPDATE;
break;
default:
bfa_sm_fault(event);
}
}
static void
cmdq_sm_init_wait_entry(struct bfa_msgq_cmdq *cmdq)
{
bfa_wc_down(&cmdq->msgq->init_wc);
}
static void
cmdq_sm_init_wait(struct bfa_msgq_cmdq *cmdq, enum cmdq_event event)
{
switch (event) {
case CMDQ_E_STOP:
case CMDQ_E_FAIL:
bfa_fsm_set_state(cmdq, cmdq_sm_stopped);
break;
case CMDQ_E_POST:
cmdq->flags |= BFA_MSGQ_CMDQ_F_DB_UPDATE;
break;
case CMDQ_E_INIT_RESP:
if (cmdq->flags & BFA_MSGQ_CMDQ_F_DB_UPDATE) {
cmdq->flags &= ~BFA_MSGQ_CMDQ_F_DB_UPDATE;
bfa_fsm_set_state(cmdq, cmdq_sm_dbell_wait);
} else
bfa_fsm_set_state(cmdq, cmdq_sm_ready);
break;
default:
bfa_sm_fault(event);
}
}
static void
cmdq_sm_ready_entry(struct bfa_msgq_cmdq *cmdq)
{
}
static void
cmdq_sm_ready(struct bfa_msgq_cmdq *cmdq, enum cmdq_event event)
{
switch (event) {
case CMDQ_E_STOP:
case CMDQ_E_FAIL:
bfa_fsm_set_state(cmdq, cmdq_sm_stopped);
break;
case CMDQ_E_POST:
bfa_fsm_set_state(cmdq, cmdq_sm_dbell_wait);
break;
default:
bfa_sm_fault(event);
}
}
static void
cmdq_sm_dbell_wait_entry(struct bfa_msgq_cmdq *cmdq)
{
bfa_msgq_cmdq_dbell(cmdq);
}
static void
cmdq_sm_dbell_wait(struct bfa_msgq_cmdq *cmdq, enum cmdq_event event)
{
switch (event) {
case CMDQ_E_STOP:
case CMDQ_E_FAIL:
bfa_fsm_set_state(cmdq, cmdq_sm_stopped);
break;
case CMDQ_E_POST:
cmdq->flags |= BFA_MSGQ_CMDQ_F_DB_UPDATE;
break;
case CMDQ_E_DB_READY:
if (cmdq->flags & BFA_MSGQ_CMDQ_F_DB_UPDATE) {
cmdq->flags &= ~BFA_MSGQ_CMDQ_F_DB_UPDATE;
bfa_fsm_set_state(cmdq, cmdq_sm_dbell_wait);
} else
bfa_fsm_set_state(cmdq, cmdq_sm_ready);
break;
default:
bfa_sm_fault(event);
}
}
static void
bfa_msgq_cmdq_dbell_ready(void *arg)
{
struct bfa_msgq_cmdq *cmdq = (struct bfa_msgq_cmdq *)arg;
bfa_fsm_send_event(cmdq, CMDQ_E_DB_READY);
}
static void
bfa_msgq_cmdq_dbell(struct bfa_msgq_cmdq *cmdq)
{
struct bfi_msgq_h2i_db *dbell =
(struct bfi_msgq_h2i_db *)(&cmdq->dbell_mb.msg[0]);
memset(dbell, 0, sizeof(struct bfi_msgq_h2i_db));
bfi_h2i_set(dbell->mh, BFI_MC_MSGQ, BFI_MSGQ_H2I_DOORBELL_PI, 0);
dbell->mh.mtag.i2htok = 0;
dbell->idx.cmdq_pi = htons(cmdq->producer_index);
if (!bfa_nw_ioc_mbox_queue(cmdq->msgq->ioc, &cmdq->dbell_mb,
bfa_msgq_cmdq_dbell_ready, cmdq)) {
bfa_msgq_cmdq_dbell_ready(cmdq);
}
}
static void
__cmd_copy(struct bfa_msgq_cmdq *cmdq, struct bfa_msgq_cmd_entry *cmd)
{
size_t len = cmd->msg_size;
int num_entries = 0;
size_t to_copy;
u8 *src, *dst;
src = (u8 *)cmd->msg_hdr;
dst = (u8 *)cmdq->addr.kva;
dst += (cmdq->producer_index * BFI_MSGQ_CMD_ENTRY_SIZE);
while (len) {
to_copy = (len < BFI_MSGQ_CMD_ENTRY_SIZE) ?
len : BFI_MSGQ_CMD_ENTRY_SIZE;
memcpy(dst, src, to_copy);
len -= to_copy;
src += BFI_MSGQ_CMD_ENTRY_SIZE;
BFA_MSGQ_INDX_ADD(cmdq->producer_index, 1, cmdq->depth);
dst = (u8 *)cmdq->addr.kva;
dst += (cmdq->producer_index * BFI_MSGQ_CMD_ENTRY_SIZE);
num_entries++;
}
}
static void
bfa_msgq_cmdq_ci_update(struct bfa_msgq_cmdq *cmdq, struct bfi_mbmsg *mb)
{
struct bfi_msgq_i2h_db *dbell = (struct bfi_msgq_i2h_db *)mb;
struct bfa_msgq_cmd_entry *cmd;
int posted = 0;
cmdq->consumer_index = ntohs(dbell->idx.cmdq_ci);
/* Walk through pending list to see if the command can be posted */
while (!list_empty(&cmdq->pending_q)) {
cmd =
(struct bfa_msgq_cmd_entry *)bfa_q_first(&cmdq->pending_q);
if (ntohs(cmd->msg_hdr->num_entries) <=
BFA_MSGQ_FREE_CNT(cmdq)) {
list_del(&cmd->qe);
__cmd_copy(cmdq, cmd);
posted = 1;
call_cmdq_ent_cbfn(cmd, BFA_STATUS_OK);
} else {
break;
}
}
if (posted)
bfa_fsm_send_event(cmdq, CMDQ_E_POST);
}
static void
bfa_msgq_cmdq_copy_next(void *arg)
{
struct bfa_msgq_cmdq *cmdq = (struct bfa_msgq_cmdq *)arg;
if (cmdq->bytes_to_copy)
bfa_msgq_cmdq_copy_rsp(cmdq);
}
static void
bfa_msgq_cmdq_copy_req(struct bfa_msgq_cmdq *cmdq, struct bfi_mbmsg *mb)
{
struct bfi_msgq_i2h_cmdq_copy_req *req =
(struct bfi_msgq_i2h_cmdq_copy_req *)mb;
cmdq->token = 0;
cmdq->offset = ntohs(req->offset);
cmdq->bytes_to_copy = ntohs(req->len);
bfa_msgq_cmdq_copy_rsp(cmdq);
}
static void
bfa_msgq_cmdq_copy_rsp(struct bfa_msgq_cmdq *cmdq)
{
struct bfi_msgq_h2i_cmdq_copy_rsp *rsp =
(struct bfi_msgq_h2i_cmdq_copy_rsp *)&cmdq->copy_mb.msg[0];
int copied;
u8 *addr = (u8 *)cmdq->addr.kva;
memset(rsp, 0, sizeof(struct bfi_msgq_h2i_cmdq_copy_rsp));
bfi_h2i_set(rsp->mh, BFI_MC_MSGQ, BFI_MSGQ_H2I_CMDQ_COPY_RSP, 0);
rsp->mh.mtag.i2htok = htons(cmdq->token);
copied = (cmdq->bytes_to_copy >= BFI_CMD_COPY_SZ) ? BFI_CMD_COPY_SZ :
cmdq->bytes_to_copy;
addr += cmdq->offset;
memcpy(rsp->data, addr, copied);
cmdq->token++;
cmdq->offset += copied;
cmdq->bytes_to_copy -= copied;
if (!bfa_nw_ioc_mbox_queue(cmdq->msgq->ioc, &cmdq->copy_mb,
bfa_msgq_cmdq_copy_next, cmdq)) {
bfa_msgq_cmdq_copy_next(cmdq);
}
}
static void
bfa_msgq_cmdq_attach(struct bfa_msgq_cmdq *cmdq, struct bfa_msgq *msgq)
{
cmdq->depth = BFA_MSGQ_CMDQ_NUM_ENTRY;
INIT_LIST_HEAD(&cmdq->pending_q);
cmdq->msgq = msgq;
bfa_fsm_set_state(cmdq, cmdq_sm_stopped);
}
static void bfa_msgq_rspq_dbell(struct bfa_msgq_rspq *rspq);
enum rspq_event {
RSPQ_E_START = 1,
RSPQ_E_STOP = 2,
RSPQ_E_FAIL = 3,
RSPQ_E_RESP = 4,
RSPQ_E_INIT_RESP = 5,
RSPQ_E_DB_READY = 6,
};
bfa_fsm_state_decl(rspq, stopped, struct bfa_msgq_rspq, enum rspq_event);
bfa_fsm_state_decl(rspq, init_wait, struct bfa_msgq_rspq,
enum rspq_event);
bfa_fsm_state_decl(rspq, ready, struct bfa_msgq_rspq, enum rspq_event);
bfa_fsm_state_decl(rspq, dbell_wait, struct bfa_msgq_rspq,
enum rspq_event);
static void
rspq_sm_stopped_entry(struct bfa_msgq_rspq *rspq)
{
rspq->producer_index = 0;
rspq->consumer_index = 0;
rspq->flags = 0;
}
static void
rspq_sm_stopped(struct bfa_msgq_rspq *rspq, enum rspq_event event)
{
switch (event) {
case RSPQ_E_START:
bfa_fsm_set_state(rspq, rspq_sm_init_wait);
break;
case RSPQ_E_STOP:
case RSPQ_E_FAIL:
/* No-op */
break;
default:
bfa_sm_fault(event);
}
}
static void
rspq_sm_init_wait_entry(struct bfa_msgq_rspq *rspq)
{
bfa_wc_down(&rspq->msgq->init_wc);
}
static void
rspq_sm_init_wait(struct bfa_msgq_rspq *rspq, enum rspq_event event)
{
switch (event) {
case RSPQ_E_FAIL:
case RSPQ_E_STOP:
bfa_fsm_set_state(rspq, rspq_sm_stopped);
break;
case RSPQ_E_INIT_RESP:
bfa_fsm_set_state(rspq, rspq_sm_ready);
break;
default:
bfa_sm_fault(event);
}
}
static void
rspq_sm_ready_entry(struct bfa_msgq_rspq *rspq)
{
}
static void
rspq_sm_ready(struct bfa_msgq_rspq *rspq, enum rspq_event event)
{
switch (event) {
case RSPQ_E_STOP:
case RSPQ_E_FAIL:
bfa_fsm_set_state(rspq, rspq_sm_stopped);
break;
case RSPQ_E_RESP:
bfa_fsm_set_state(rspq, rspq_sm_dbell_wait);
break;
default:
bfa_sm_fault(event);
}
}
static void
rspq_sm_dbell_wait_entry(struct bfa_msgq_rspq *rspq)
{
if (!bfa_nw_ioc_is_disabled(rspq->msgq->ioc))
bfa_msgq_rspq_dbell(rspq);
}
static void
rspq_sm_dbell_wait(struct bfa_msgq_rspq *rspq, enum rspq_event event)
{
switch (event) {
case RSPQ_E_STOP:
case RSPQ_E_FAIL:
bfa_fsm_set_state(rspq, rspq_sm_stopped);
break;
case RSPQ_E_RESP:
rspq->flags |= BFA_MSGQ_RSPQ_F_DB_UPDATE;
break;
case RSPQ_E_DB_READY:
if (rspq->flags & BFA_MSGQ_RSPQ_F_DB_UPDATE) {
rspq->flags &= ~BFA_MSGQ_RSPQ_F_DB_UPDATE;
bfa_fsm_set_state(rspq, rspq_sm_dbell_wait);
} else
bfa_fsm_set_state(rspq, rspq_sm_ready);
break;
default:
bfa_sm_fault(event);
}
}
static void
bfa_msgq_rspq_dbell_ready(void *arg)
{
struct bfa_msgq_rspq *rspq = (struct bfa_msgq_rspq *)arg;
bfa_fsm_send_event(rspq, RSPQ_E_DB_READY);
}
static void
bfa_msgq_rspq_dbell(struct bfa_msgq_rspq *rspq)
{
struct bfi_msgq_h2i_db *dbell =
(struct bfi_msgq_h2i_db *)(&rspq->dbell_mb.msg[0]);
memset(dbell, 0, sizeof(struct bfi_msgq_h2i_db));
bfi_h2i_set(dbell->mh, BFI_MC_MSGQ, BFI_MSGQ_H2I_DOORBELL_CI, 0);
dbell->mh.mtag.i2htok = 0;
dbell->idx.rspq_ci = htons(rspq->consumer_index);
if (!bfa_nw_ioc_mbox_queue(rspq->msgq->ioc, &rspq->dbell_mb,
bfa_msgq_rspq_dbell_ready, rspq)) {
bfa_msgq_rspq_dbell_ready(rspq);
}
}
static void
bfa_msgq_rspq_pi_update(struct bfa_msgq_rspq *rspq, struct bfi_mbmsg *mb)
{
struct bfi_msgq_i2h_db *dbell = (struct bfi_msgq_i2h_db *)mb;
struct bfi_msgq_mhdr *msghdr;
int num_entries;
int mc;
u8 *rspq_qe;
rspq->producer_index = ntohs(dbell->idx.rspq_pi);
while (rspq->consumer_index != rspq->producer_index) {
rspq_qe = (u8 *)rspq->addr.kva;
rspq_qe += (rspq->consumer_index * BFI_MSGQ_RSP_ENTRY_SIZE);
msghdr = (struct bfi_msgq_mhdr *)rspq_qe;
mc = msghdr->msg_class;
num_entries = ntohs(msghdr->num_entries);
if ((mc >= BFI_MC_MAX) || (rspq->rsphdlr[mc].cbfn == NULL))
break;
(rspq->rsphdlr[mc].cbfn)(rspq->rsphdlr[mc].cbarg, msghdr);
BFA_MSGQ_INDX_ADD(rspq->consumer_index, num_entries,
rspq->depth);
}
bfa_fsm_send_event(rspq, RSPQ_E_RESP);
}
static void
bfa_msgq_rspq_attach(struct bfa_msgq_rspq *rspq, struct bfa_msgq *msgq)
{
rspq->depth = BFA_MSGQ_RSPQ_NUM_ENTRY;
rspq->msgq = msgq;
bfa_fsm_set_state(rspq, rspq_sm_stopped);
}
static void
bfa_msgq_init_rsp(struct bfa_msgq *msgq,
struct bfi_mbmsg *mb)
{
bfa_fsm_send_event(&msgq->cmdq, CMDQ_E_INIT_RESP);
bfa_fsm_send_event(&msgq->rspq, RSPQ_E_INIT_RESP);
}
static void
bfa_msgq_init(void *arg)
{
struct bfa_msgq *msgq = (struct bfa_msgq *)arg;
struct bfi_msgq_cfg_req *msgq_cfg =
(struct bfi_msgq_cfg_req *)&msgq->init_mb.msg[0];
memset(msgq_cfg, 0, sizeof(struct bfi_msgq_cfg_req));
bfi_h2i_set(msgq_cfg->mh, BFI_MC_MSGQ, BFI_MSGQ_H2I_INIT_REQ, 0);
msgq_cfg->mh.mtag.i2htok = 0;
bfa_dma_be_addr_set(msgq_cfg->cmdq.addr, msgq->cmdq.addr.pa);
msgq_cfg->cmdq.q_depth = htons(msgq->cmdq.depth);
bfa_dma_be_addr_set(msgq_cfg->rspq.addr, msgq->rspq.addr.pa);
msgq_cfg->rspq.q_depth = htons(msgq->rspq.depth);
bfa_nw_ioc_mbox_queue(msgq->ioc, &msgq->init_mb, NULL, NULL);
}
static void
bfa_msgq_isr(void *cbarg, struct bfi_mbmsg *msg)
{
struct bfa_msgq *msgq = (struct bfa_msgq *)cbarg;
switch (msg->mh.msg_id) {
case BFI_MSGQ_I2H_INIT_RSP:
bfa_msgq_init_rsp(msgq, msg);
break;
case BFI_MSGQ_I2H_DOORBELL_PI:
bfa_msgq_rspq_pi_update(&msgq->rspq, msg);
break;
case BFI_MSGQ_I2H_DOORBELL_CI:
bfa_msgq_cmdq_ci_update(&msgq->cmdq, msg);
break;
case BFI_MSGQ_I2H_CMDQ_COPY_REQ:
bfa_msgq_cmdq_copy_req(&msgq->cmdq, msg);
break;
default:
BUG_ON(1);
}
}
static void
bfa_msgq_notify(void *cbarg, enum bfa_ioc_event event)
{
struct bfa_msgq *msgq = (struct bfa_msgq *)cbarg;
switch (event) {
case BFA_IOC_E_ENABLED:
bfa_wc_init(&msgq->init_wc, bfa_msgq_init, msgq);
bfa_wc_up(&msgq->init_wc);
bfa_fsm_send_event(&msgq->cmdq, CMDQ_E_START);
bfa_wc_up(&msgq->init_wc);
bfa_fsm_send_event(&msgq->rspq, RSPQ_E_START);
bfa_wc_wait(&msgq->init_wc);
break;
case BFA_IOC_E_DISABLED:
bfa_fsm_send_event(&msgq->cmdq, CMDQ_E_STOP);
bfa_fsm_send_event(&msgq->rspq, RSPQ_E_STOP);
break;
case BFA_IOC_E_FAILED:
bfa_fsm_send_event(&msgq->cmdq, CMDQ_E_FAIL);
bfa_fsm_send_event(&msgq->rspq, RSPQ_E_FAIL);
break;
default:
break;
}
}
u32
bfa_msgq_meminfo(void)
{
return roundup(BFA_MSGQ_CMDQ_SIZE, BFA_DMA_ALIGN_SZ) +
roundup(BFA_MSGQ_RSPQ_SIZE, BFA_DMA_ALIGN_SZ);
}
void
bfa_msgq_memclaim(struct bfa_msgq *msgq, u8 *kva, u64 pa)
{
msgq->cmdq.addr.kva = kva;
msgq->cmdq.addr.pa = pa;
kva += roundup(BFA_MSGQ_CMDQ_SIZE, BFA_DMA_ALIGN_SZ);
pa += roundup(BFA_MSGQ_CMDQ_SIZE, BFA_DMA_ALIGN_SZ);
msgq->rspq.addr.kva = kva;
msgq->rspq.addr.pa = pa;
}
void
bfa_msgq_attach(struct bfa_msgq *msgq, struct bfa_ioc *ioc)
{
msgq->ioc = ioc;
bfa_msgq_cmdq_attach(&msgq->cmdq, msgq);
bfa_msgq_rspq_attach(&msgq->rspq, msgq);
bfa_nw_ioc_mbox_regisr(msgq->ioc, BFI_MC_MSGQ, bfa_msgq_isr, msgq);
bfa_q_qe_init(&msgq->ioc_notify);
bfa_ioc_notify_init(&msgq->ioc_notify, bfa_msgq_notify, msgq);
bfa_nw_ioc_notify_register(msgq->ioc, &msgq->ioc_notify);
}
void
bfa_msgq_regisr(struct bfa_msgq *msgq, enum bfi_mclass mc,
bfa_msgq_mcfunc_t cbfn, void *cbarg)
{
msgq->rspq.rsphdlr[mc].cbfn = cbfn;
msgq->rspq.rsphdlr[mc].cbarg = cbarg;
}
void
bfa_msgq_cmd_post(struct bfa_msgq *msgq, struct bfa_msgq_cmd_entry *cmd)
{
if (ntohs(cmd->msg_hdr->num_entries) <=
BFA_MSGQ_FREE_CNT(&msgq->cmdq)) {
__cmd_copy(&msgq->cmdq, cmd);
call_cmdq_ent_cbfn(cmd, BFA_STATUS_OK);
bfa_fsm_send_event(&msgq->cmdq, CMDQ_E_POST);
} else {
list_add_tail(&cmd->qe, &msgq->cmdq.pending_q);
}
}
void
bfa_msgq_rsp_copy(struct bfa_msgq *msgq, u8 *buf, size_t buf_len)
{
struct bfa_msgq_rspq *rspq = &msgq->rspq;
size_t len = buf_len;
size_t to_copy;
int ci;
u8 *src, *dst;
ci = rspq->consumer_index;
src = (u8 *)rspq->addr.kva;
src += (ci * BFI_MSGQ_RSP_ENTRY_SIZE);
dst = buf;
while (len) {
to_copy = (len < BFI_MSGQ_RSP_ENTRY_SIZE) ?
len : BFI_MSGQ_RSP_ENTRY_SIZE;
memcpy(dst, src, to_copy);
len -= to_copy;
dst += BFI_MSGQ_RSP_ENTRY_SIZE;
BFA_MSGQ_INDX_ADD(ci, 1, rspq->depth);
src = (u8 *)rspq->addr.kva;
src += (ci * BFI_MSGQ_RSP_ENTRY_SIZE);
}
}