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gerrit-public.fairphone.software / kernel / msm-4.9 / a212cf530acf4a7d3b4b245755d69806e56df334 / . / drivers / media / platform / msm / camera / cam_req_mgr / cam_req_mgr_core.c
blob: 4c4afc1841f870bdc22a5a6e62a9f9c8488af792 [file] [log] [blame]
/* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only 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.
*/
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include "cam_req_mgr_interface.h"
#include "cam_req_mgr_util.h"
#include "cam_req_mgr_core.h"
#include "cam_req_mgr_workq.h"
#include "cam_req_mgr_debug.h"
#include "cam_trace.h"
#include "cam_debug_util.h"
#include "cam_req_mgr_dev.h"
static struct cam_req_mgr_core_device *g_crm_core_dev;
void cam_req_mgr_handle_core_shutdown(void)
{
struct cam_req_mgr_core_session *session;
struct cam_req_mgr_core_session *tsession;
struct cam_req_mgr_session_info ses_info;
if (!list_empty(&g_crm_core_dev->session_head)) {
list_for_each_entry_safe(session, tsession,
&g_crm_core_dev->session_head, entry) {
ses_info.session_hdl =
session->session_hdl;
cam_req_mgr_destroy_session(&ses_info);
}
}
}
static int __cam_req_mgr_setup_payload(struct cam_req_mgr_core_workq *workq)
{
int32_t i = 0;
int rc = 0;
struct crm_task_payload *task_data = NULL;
task_data = kcalloc(
workq->task.num_task, sizeof(*task_data),
GFP_KERNEL);
if (!task_data) {
rc = -ENOMEM;
} else {
for (i = 0; i < workq->task.num_task; i++)
workq->task.pool[i].payload = &task_data[i];
}
return rc;
}
/**
* __cam_req_mgr_reset_req_tbl()
*
* @brief : Initialize req table data
* @in_q : request queue pointer
*
* @return: 0 for success, negative for failure
*
*/
static int __cam_req_mgr_print_req_tbl(struct cam_req_mgr_req_data *req)
{
int rc = 0;
int32_t i = 0;
struct cam_req_mgr_req_queue *in_q = req->in_q;
struct cam_req_mgr_req_tbl *req_tbl = req->l_tbl;
if (!in_q || !req_tbl) {
CAM_WARN(CAM_CRM, "NULL pointer %pK %pK", in_q, req_tbl);
return -EINVAL;
}
CAM_DBG(CAM_CRM, "in_q %pK %pK %d", in_q, req_tbl, req_tbl->num_slots);
mutex_lock(&req->lock);
for (i = 0; i < in_q->num_slots; i++) {
CAM_DBG(CAM_CRM, "IN_Q %d: idx %d, red_id %lld", i,
in_q->slot[i].idx, CRM_GET_REQ_ID(in_q, i));
}
while (req_tbl != NULL) {
for (i = 0; i < req_tbl->num_slots; i++) {
CAM_DBG(CAM_CRM, "idx= %d, map= %x, state= %d",
req_tbl->slot[i].idx,
req_tbl->slot[i].req_ready_map,
req_tbl->slot[i].state);
}
CAM_DBG(CAM_CRM,
"TBL:id= %d, pd=%d cnt=%d mask=%x skip=%d num_slt= %d",
req_tbl->id, req_tbl->pd, req_tbl->dev_count,
req_tbl->dev_mask, req_tbl->skip_traverse,
req_tbl->num_slots);
req_tbl = req_tbl->next;
}
mutex_unlock(&req->lock);
return rc;
}
/**
* __cam_req_mgr_find_pd_tbl()
*
* @brief : Find pipeline delay based table pointer which matches delay
* @tbl : Pointer to list of request table
* @delay : Pipeline delay value to be searched for comparison
*
* @return : pointer to request table for matching pipeline delay table.
*
*/
static struct cam_req_mgr_req_tbl *__cam_req_mgr_find_pd_tbl(
struct cam_req_mgr_req_tbl *tbl, int32_t delay)
{
if (!tbl)
return NULL;
do {
if (delay != tbl->pd)
tbl = tbl->next;
else
return tbl;
} while (tbl != NULL);
return NULL;
}
/**
* __cam_req_mgr_inc_idx()
*
* @brief : Increment val passed by step size and rollover after max_val
* @val : value to be incremented
* @step : amount/step by which val is incremented
* @max_val : max val after which idx will roll over
*
*/
static void __cam_req_mgr_inc_idx(int32_t *val, int32_t step, int32_t max_val)
{
*val = (*val + step) % max_val;
}
/**
* __cam_req_mgr_dec_idx()
*
* @brief : Decrement val passed by step size and rollover after max_val
* @val : value to be decremented
* @step : amount/step by which val is decremented
* @max_val : after zero value will roll over to max val
*
*/
static void __cam_req_mgr_dec_idx(int32_t *val, int32_t step, int32_t max_val)
{
*val = *val - step;
if (*val < 0)
*val = max_val + (*val);
}
/**
* __cam_req_mgr_validate_inject_delay()
*
* @brief : Check if any pd device is introducing inject delay
* @tbl : cam_req_mgr_req_tbl
* @curr_idx : slot idx
*
* @return : 0 for success, negative for failure
*/
static int __cam_req_mgr_validate_inject_delay(
struct cam_req_mgr_req_tbl *tbl,
int32_t curr_idx)
{
struct cam_req_mgr_tbl_slot *slot = NULL;
while (tbl) {
slot = &tbl->slot[curr_idx];
if (slot->inject_delay > 0) {
slot->inject_delay--;
return -EAGAIN;
}
__cam_req_mgr_dec_idx(&curr_idx, tbl->pd_delta,
tbl->num_slots);
tbl = tbl->next;
}
return 0;
}
/**
* __cam_req_mgr_traverse()
*
* @brief : Traverse through pd tables, it will internally cover all linked
* pd tables. Each pd table visited will check if idx passed to its
* in ready state. If ready means all devices linked to the pd table
* have this request id packet ready. Then it calls subsequent pd
* tbl with new idx. New idx value takes into account the delta
* between current pd table and next one.
* @traverse_data: contains all the info to traverse through pd tables
*
* @return: 0 for success, negative for failure
*
*/
static int __cam_req_mgr_traverse(struct cam_req_mgr_traverse *traverse_data)
{
int rc = 0;
int32_t next_idx = traverse_data->idx;
int32_t curr_idx = traverse_data->idx;
struct cam_req_mgr_req_tbl *tbl;
struct cam_req_mgr_apply *apply_data;
struct cam_req_mgr_tbl_slot *slot = NULL;
if (!traverse_data->tbl || !traverse_data->apply_data) {
CAM_ERR(CAM_CRM, "NULL pointer %pK %pK",
traverse_data->tbl, traverse_data->apply_data);
traverse_data->result = 0;
return -EINVAL;
}
tbl = traverse_data->tbl;
apply_data = traverse_data->apply_data;
slot = &tbl->slot[curr_idx];
CAM_DBG(CAM_CRM,
"Enter pd %d idx %d state %d skip %d status %d skip_idx %d",
tbl->pd, curr_idx, tbl->slot[curr_idx].state,
tbl->skip_traverse, traverse_data->in_q->slot[curr_idx].status,
traverse_data->in_q->slot[curr_idx].skip_idx);
if ((traverse_data->self_link == true) &&
(!traverse_data->inject_delay_chk)) {
rc = __cam_req_mgr_validate_inject_delay(tbl, curr_idx);
if (rc) {
CAM_DBG(CAM_CRM, "Injecting Delay of one frame");
apply_data[tbl->pd].req_id = -1;
/* This pd tbl not ready to proceed with asked idx */
SET_FAILURE_BIT(traverse_data->result, tbl->pd);
return -EAGAIN;
}
traverse_data->inject_delay_chk = true;
}
/* Check if req is ready or in skip mode or pd tbl is in skip mode */
if (tbl->slot[curr_idx].state == CRM_REQ_STATE_READY ||
traverse_data->in_q->slot[curr_idx].skip_idx == 1 ||
tbl->skip_traverse > 0) {
if (tbl->next) {
__cam_req_mgr_dec_idx(&next_idx, tbl->pd_delta,
tbl->num_slots);
traverse_data->idx = next_idx;
traverse_data->tbl = tbl->next;
rc = __cam_req_mgr_traverse(traverse_data);
}
if (rc >= 0) {
SET_SUCCESS_BIT(traverse_data->result, tbl->pd);
if (traverse_data->validate_only == false) {
apply_data[tbl->pd].pd = tbl->pd;
apply_data[tbl->pd].req_id =
CRM_GET_REQ_ID(
traverse_data->in_q, curr_idx);
apply_data[tbl->pd].idx = curr_idx;
CAM_DBG(CAM_CRM, "req_id: %lld with pd of %d",
apply_data[tbl->pd].req_id,
apply_data[tbl->pd].pd);
/*
* If traverse is successful decrement
* traverse skip
*/
if (tbl->skip_traverse > 0) {
apply_data[tbl->pd].req_id = -1;
tbl->skip_traverse--;
}
}
} else {
/* linked pd table is not ready for this traverse yet */
return rc;
}
} else {
/* This pd table is not ready to proceed with asked idx */
CAM_INFO(CAM_CRM,
"Skip Frame: req: %lld not ready pd: %d open_req count: %d",
CRM_GET_REQ_ID(traverse_data->in_q, curr_idx),
tbl->pd,
traverse_data->open_req_cnt);
SET_FAILURE_BIT(traverse_data->result, tbl->pd);
return -EAGAIN;
}
return 0;
}
/**
* __cam_req_mgr_in_q_skip_idx()
*
* @brief : Decrement val passed by step size and rollover after max_val
* @in_q : input queue pointer
* @idx : Sets skip_idx bit of the particular slot to true so when traverse
* happens for this idx, no req will be submitted for devices
* handling this idx.
*
*/
static void __cam_req_mgr_in_q_skip_idx(struct cam_req_mgr_req_queue *in_q,
int32_t idx)
{
in_q->slot[idx].req_id = -1;
in_q->slot[idx].skip_idx = 1;
in_q->slot[idx].status = CRM_SLOT_STATUS_REQ_ADDED;
CAM_DBG(CAM_CRM, "SET IDX SKIP on slot= %d", idx);
}
/**
* __cam_req_mgr_tbl_set_id()
*
* @brief : Set unique id to table
* @tbl : pipeline based table which requires new id
* @req : pointer to request data wihch contains num_tables counter
*
*/
static void __cam_req_mgr_tbl_set_id(struct cam_req_mgr_req_tbl *tbl,
struct cam_req_mgr_req_data *req)
{
if (!tbl)
return;
do {
tbl->id = req->num_tbl++;
CAM_DBG(CAM_CRM, "%d: pd %d skip_traverse %d delta %d",
tbl->id, tbl->pd, tbl->skip_traverse,
tbl->pd_delta);
tbl = tbl->next;
} while (tbl != NULL);
}
/**
* __cam_req_mgr_tbl_set_all_skip_cnt()
*
* @brief : Each pd table sets skip value based on delta between itself and
* max pd value. During initial streamon or bubble case this is
* used. That way each pd table skips required num of traverse and
* align themselve with req mgr connected devs.
* @l_tbl : iterates through list of pd tables and sets skip traverse
*
*/
static void __cam_req_mgr_tbl_set_all_skip_cnt(
struct cam_req_mgr_req_tbl **l_tbl)
{
struct cam_req_mgr_req_tbl *tbl = *l_tbl;
int32_t max_pd;
if (!tbl)
return;
max_pd = tbl->pd;
do {
tbl->skip_traverse = max_pd - tbl->pd;
CAM_DBG(CAM_CRM, "%d: pd %d skip_traverse %d delta %d",
tbl->id, tbl->pd, tbl->skip_traverse,
tbl->pd_delta);
tbl = tbl->next;
} while (tbl != NULL);
}
/**
* __cam_req_mgr_reset_req_slot()
*
* @brief : reset specified idx/slot in input queue as well as all pd tables
* @link : link pointer
* @idx : slot index which will be reset
*
*/
static void __cam_req_mgr_reset_req_slot(struct cam_req_mgr_core_link *link,
int32_t idx)
{
struct cam_req_mgr_slot *slot;
struct cam_req_mgr_req_tbl *tbl = link->req.l_tbl;
struct cam_req_mgr_req_queue *in_q = link->req.in_q;
slot = &in_q->slot[idx];
CAM_DBG(CAM_CRM, "RESET: idx: %d: slot->status %d", idx, slot->status);
/* Check if CSL has already pushed new request*/
if (slot->status == CRM_SLOT_STATUS_REQ_ADDED)
return;
/* Reset input queue slot */
slot->req_id = -1;
slot->skip_idx = 0;
slot->recover = 0;
slot->sync_mode = CAM_REQ_MGR_SYNC_MODE_NO_SYNC;
slot->status = CRM_SLOT_STATUS_NO_REQ;
/* Reset all pd table slot */
while (tbl != NULL) {
CAM_DBG(CAM_CRM, "pd: %d: idx %d state %d",
tbl->pd, idx, tbl->slot[idx].state);
tbl->slot[idx].req_ready_map = 0;
tbl->slot[idx].state = CRM_REQ_STATE_EMPTY;
tbl = tbl->next;
}
}
/**
* __cam_req_mgr_check_next_req_slot()
*
* @brief : While streaming if input queue does not contain any pending
* request, req mgr still needs to submit pending request ids to
* devices with lower pipeline delay value.
* @in_q : Pointer to input queue where req mgr wil peep into
*
*/
static void __cam_req_mgr_check_next_req_slot(
struct cam_req_mgr_req_queue *in_q)
{
int32_t idx = in_q->rd_idx;
struct cam_req_mgr_slot *slot;
__cam_req_mgr_inc_idx(&idx, 1, in_q->num_slots);
slot = &in_q->slot[idx];
CAM_DBG(CAM_CRM, "idx: %d: slot->status %d", idx, slot->status);
/* Check if there is new req from CSL, if not complete req */
if (slot->status == CRM_SLOT_STATUS_NO_REQ) {
__cam_req_mgr_in_q_skip_idx(in_q, idx);
if (in_q->wr_idx != idx)
CAM_WARN(CAM_CRM,
"CHECK here wr %d, rd %d", in_q->wr_idx, idx);
__cam_req_mgr_inc_idx(&in_q->wr_idx, 1, in_q->num_slots);
}
}
/**
* __cam_req_mgr_send_req()
*
* @brief : send request id to be applied to each device connected on link
* @link : pointer to link whose input queue and req tbl are
* traversed through
* @in_q : pointer to input request queue
*
* @return : 0 for success, negative for failure
*
*/
static int __cam_req_mgr_send_req(struct cam_req_mgr_core_link *link,
struct cam_req_mgr_req_queue *in_q, uint32_t trigger)
{
int rc = 0, pd, i, idx;
struct cam_req_mgr_connected_device *dev = NULL;
struct cam_req_mgr_apply_request apply_req;
struct cam_req_mgr_link_evt_data evt_data;
apply_req.link_hdl = link->link_hdl;
apply_req.report_if_bubble = 0;
for (i = 0; i < link->num_devs; i++) {
dev = &link->l_dev[i];
if (dev) {
pd = dev->dev_info.p_delay;
if (pd >= CAM_PIPELINE_DELAY_MAX) {
CAM_WARN(CAM_CRM, "pd %d greater than max",
pd);
continue;
}
if (link->req.apply_data[pd].skip_idx ||
link->req.apply_data[pd].req_id < 0) {
CAM_DBG(CAM_CRM, "skip %d req_id %lld",
link->req.apply_data[pd].skip_idx,
link->req.apply_data[pd].req_id);
continue;
}
if (!(dev->dev_info.trigger & trigger))
continue;
apply_req.dev_hdl = dev->dev_hdl;
apply_req.request_id =
link->req.apply_data[pd].req_id;
idx = link->req.apply_data[pd].idx;
apply_req.report_if_bubble =
in_q->slot[idx].recover;
trace_cam_req_mgr_apply_request(link, &apply_req, dev);
apply_req.trigger_point = trigger;
CAM_DBG(CAM_REQ,
"SEND: link_hdl: %x pd %d req_id %lld",
link->link_hdl, pd, apply_req.request_id);
if (dev->ops && dev->ops->apply_req) {
rc = dev->ops->apply_req(&apply_req);
if (rc < 0)
break;
if (pd == link->max_delay)
link->open_req_cnt--;
}
}
}
if (rc < 0) {
CAM_ERR_RATE_LIMIT(CAM_CRM, "APPLY FAILED pd %d req_id %lld",
dev->dev_info.p_delay, apply_req.request_id);
/* Apply req failed notify already applied devs */
for (; i >= 0; i--) {
dev = &link->l_dev[i];
evt_data.evt_type = CAM_REQ_MGR_LINK_EVT_ERR;
evt_data.dev_hdl = dev->dev_hdl;
evt_data.link_hdl = link->link_hdl;
evt_data.req_id = apply_req.request_id;
evt_data.u.error = CRM_KMD_ERR_BUBBLE;
if (dev->ops && dev->ops->process_evt)
dev->ops->process_evt(&evt_data);
}
}
return rc;
}
/**
* __cam_req_mgr_check_link_is_ready()
*
* @brief : traverse through all request tables and see if all devices are
* ready to apply request settings.
* @link : pointer to link whose input queue and req tbl are
* traversed through
* @idx : index within input request queue
* @validate_only : Whether to validate only and/or update settings
* @self_link : To indicate whether the validation is for the given link or
* other sync link
*
* @return : 0 for success, negative for failure
*
*/
static int __cam_req_mgr_check_link_is_ready(struct cam_req_mgr_core_link *link,
int32_t idx, bool validate_only, bool self_link)
{
int rc;
struct cam_req_mgr_traverse traverse_data;
struct cam_req_mgr_req_queue *in_q;
struct cam_req_mgr_apply *apply_data;
in_q = link->req.in_q;
apply_data = link->req.apply_data;
if (validate_only == false) {
memset(apply_data, 0,
sizeof(struct cam_req_mgr_apply) * CAM_PIPELINE_DELAY_MAX);
}
traverse_data.apply_data = apply_data;
traverse_data.idx = idx;
traverse_data.tbl = link->req.l_tbl;
traverse_data.in_q = in_q;
traverse_data.result = 0;
traverse_data.validate_only = validate_only;
traverse_data.self_link = self_link;
traverse_data.inject_delay_chk = false;
traverse_data.open_req_cnt = link->open_req_cnt;
/*
* Traverse through all pd tables, if result is success,
* apply the settings
*/
rc = __cam_req_mgr_traverse(&traverse_data);
CAM_DBG(CAM_CRM,
"SOF: idx %d self_link %d validate %d result %x pd_mask %x rc %d",
idx, traverse_data.self_link, traverse_data.validate_only,
traverse_data.result, link->pd_mask, rc);
if (!rc && traverse_data.result == link->pd_mask) {
CAM_DBG(CAM_CRM,
"READY: link_hdl= %x idx= %d, req_id= %lld :%lld :%lld",
link->link_hdl, idx,
apply_data[2].req_id,
apply_data[1].req_id,
apply_data[0].req_id);
} else
rc = -EAGAIN;
return rc;
}
/**
* __cam_req_mgr_find_slot_for_req()
*
* @brief : Find idx from input queue at which req id is enqueued
* @in_q : input request queue pointer
* @req_id : request id which needs to be searched in input queue
*
* @return : slot index where passed request id is stored, -1 for failure
*
*/
static int32_t __cam_req_mgr_find_slot_for_req(
struct cam_req_mgr_req_queue *in_q, int64_t req_id)
{
int32_t idx, i;
struct cam_req_mgr_slot *slot;
idx = in_q->rd_idx;
for (i = 0; i < in_q->num_slots; i++) {
slot = &in_q->slot[idx];
if (slot->req_id == req_id) {
CAM_DBG(CAM_CRM,
"req: %lld found at idx: %d status: %d sync_mode: %d",
req_id, idx, slot->status, slot->sync_mode);
break;
}
__cam_req_mgr_dec_idx(&idx, 1, in_q->num_slots);
}
if (i >= in_q->num_slots)
idx = -1;
return idx;
}
/**
* __cam_req_mgr_reset_sof_cnt()
*
* @brief : the sof_count for both the links are reset
* @link : pointer to link whose input queue and req tbl are
* traversed through
*
*/
static void __cam_req_mgr_reset_sof_cnt(
struct cam_req_mgr_core_link *link)
{
link->sof_counter = -1;
link->sync_link->sof_counter = -1;
link->frame_skip_flag = false;
CAM_DBG(CAM_CRM,
"link_hdl %x self_counter %lld other_counter %lld frame_skip_lag %d",
link->link_hdl, link->sof_counter,
link->sync_link->sof_counter, link->frame_skip_flag);
}
/**
* __cam_req_mgr_sof_cnt_initialize()
*
* @brief : when the sof count is intially -1 it increments count
* and computes the sync_self_ref for this link
* the count needs to be wrapped back starting from 0
* @link : pointer to link whose input queue and req tbl are
* traversed through
*
*/
static void __cam_req_mgr_sof_cnt_initialize(
struct cam_req_mgr_core_link *link)
{
link->sof_counter++;
link->sync_self_ref = link->sof_counter -
link->sync_link->sof_counter;
CAM_DBG(CAM_CRM,
"link_hdl %x self_counter %lld other_counter %lld",
link->link_hdl, link->sof_counter,
link->sync_link->sof_counter);
}
/**
* __cam_req_mgr_wrap_sof_cnt()
*
* @brief : once the sof count reaches a predefined maximum
* the count needs to be wrapped back starting from 0
* @link : pointer to link whose input queue and req tbl are
* traversed through
*
*/
static void __cam_req_mgr_wrap_sof_cnt(
struct cam_req_mgr_core_link *link)
{
link->sof_counter = (MAX_SYNC_COUNT -
(link->sync_link->sof_counter));
link->sync_link->sof_counter = 0;
CAM_DBG(CAM_CRM,
"link_hdl %x self_counter %lld sync_link_hdl %x other_counter %lld",
link->link_hdl, link->sof_counter,
link->sync_link->link_hdl, link->sync_link->sof_counter);
}
/**
* __cam_req_mgr_validate_sof_cnt()
*
* @brief : validates sof count difference for a given link
* @link : pointer to link whose input queue and req tbl are
* traversed through
* @sync_link : pointer to the sync link
* @return : 0 for success, negative for failure
*
*/
static int __cam_req_mgr_validate_sof_cnt(
struct cam_req_mgr_core_link *link,
struct cam_req_mgr_core_link *sync_link)
{
int64_t sync_diff = 0;
int rc = 0;
if (link->sof_counter == MAX_SYNC_COUNT)
__cam_req_mgr_wrap_sof_cnt(link);
sync_diff = link->sof_counter - sync_link->sof_counter;
CAM_DBG(CAM_CRM,
"link[%x] self_counter=%lld other_counter=%lld diff=%lld sync_self_ref=%lld",
link->link_hdl, link->sof_counter,
sync_link->sof_counter, sync_diff, link->sync_self_ref);
if (sync_diff > SYNC_LINK_SOF_CNT_MAX_LMT) {
link->sync_link->frame_skip_flag = true;
CAM_WARN(CAM_CRM,
"Detected anomaly, skip link_hdl %x self_counter=%lld other_counter=%lld sync_self_ref=%lld",
link->link_hdl, link->sof_counter,
sync_link->sof_counter, link->sync_self_ref);
rc = -EPERM;
}
return rc;
}
/**
* __cam_req_mgr_process_sync_req()
*
* @brief : processes requests during sync mode
* @link : pointer to link whose input queue and req tbl are
* traversed through
* @slot : pointer to the current slot being processed
* @return : 0 for success, negative for failure
*
*/
static int __cam_req_mgr_process_sync_req(
struct cam_req_mgr_core_link *link,
struct cam_req_mgr_slot *slot)
{
struct cam_req_mgr_core_link *sync_link = NULL;
int64_t req_id = 0;
int sync_slot_idx = 0, rc = 0;
if (!link->sync_link) {
CAM_ERR(CAM_CRM, "Sync link null");
return -EINVAL;
}
sync_link = link->sync_link;
req_id = slot->req_id;
CAM_DBG(CAM_REQ,
"link_hdl %x req %lld sync_self_ref %lld sof_counter %lld frame_skip_flag %d sync_link_self_ref %lld",
link->link_hdl, req_id, link->sync_self_ref, link->sof_counter,
link->frame_skip_flag, link->sync_link->sync_self_ref);
if (sync_link->sync_link_sof_skip) {
CAM_DBG(CAM_REQ,
"No req applied on corresponding SOF on sync link: %x",
sync_link->link_hdl);
sync_link->sync_link_sof_skip = false;
/*It is to manage compensate inject delay for each pd*/
__cam_req_mgr_check_link_is_ready(link, slot->idx, true, true);
return -EINVAL;
}
if (link->sof_counter == -1) {
__cam_req_mgr_sof_cnt_initialize(link);
} else if ((link->frame_skip_flag) &&
(sync_link->sync_self_ref != -1)) {
CAM_DBG(CAM_REQ, "Link[%x] Req[%lld] Resetting values ",
link->link_hdl, req_id);
__cam_req_mgr_reset_sof_cnt(link);
__cam_req_mgr_sof_cnt_initialize(link);
} else {
link->sof_counter++;
}
rc = __cam_req_mgr_check_link_is_ready(link, slot->idx, true, true);
if (rc) {
CAM_DBG(CAM_REQ,
"Req: %lld [My link] not ready on link: %x, rc=%d",
req_id, link->link_hdl, rc);
link->sync_link_sof_skip = true;
goto failure;
}
sync_slot_idx = __cam_req_mgr_find_slot_for_req(
sync_link->req.in_q, req_id);
if (sync_slot_idx != -1) {
rc = __cam_req_mgr_check_link_is_ready(
sync_link, sync_slot_idx, true, false);
CAM_DBG(CAM_CRM, "sync_slot_idx=%d, status=%d, rc=%d",
sync_slot_idx,
sync_link->req.in_q->slot[sync_slot_idx].status,
rc);
} else {
CAM_DBG(CAM_CRM, "sync_slot_idx=%d, rc=%d",
sync_slot_idx, rc);
}
if ((sync_slot_idx != -1) &&
((sync_link->req.in_q->slot[sync_slot_idx].status ==
CRM_SLOT_STATUS_REQ_APPLIED) || (rc == 0))) {
rc = __cam_req_mgr_validate_sof_cnt(link, sync_link);
if (rc) {
CAM_DBG(CAM_CRM,
"Req: %lld validate failed: %x",
req_id, sync_link->link_hdl);
goto failure;
}
CAM_DBG(CAM_REQ,
"Req: %lld ready to apply on link: %x [validation successful]",
req_id, link->link_hdl);
/*
* At this point all validation is successfully done
* and we can proceed to apply the given request.
* Ideally the next call should return success.
*/
rc = __cam_req_mgr_check_link_is_ready(link,
slot->idx, false, true);
if (rc) {
CAM_WARN(CAM_CRM, "Unexpected return value rc: %d", rc);
}
} else {
CAM_DBG(CAM_REQ,
"Req: %lld [Other link] not ready to apply on link: %x",
req_id, sync_link->link_hdl);
rc = -EPERM;
link->sync_link_sof_skip = true;
goto failure;
}
return rc;
failure:
link->sof_counter--;
return rc;
}
/**
* __cam_req_mgr_process_req()
*
* @brief : processes read index in request queue and traverse through table
* @link : pointer to link whose input queue and req tbl are
* traversed through
*
* @return : 0 for success, negative for failure
*
*/
static int __cam_req_mgr_process_req(struct cam_req_mgr_core_link *link,
uint32_t trigger)
{
int rc = 0, idx;
struct cam_req_mgr_slot *slot = NULL;
struct cam_req_mgr_req_queue *in_q;
struct cam_req_mgr_core_session *session;
in_q = link->req.in_q;
session = (struct cam_req_mgr_core_session *)link->parent;
mutex_lock(&session->lock);
/*
* Check if new read index,
* - if in pending state, traverse again to complete
* transaction of this read index.
* - if in applied_state, somthign wrong.
* - if in no_req state, no new req
*/
CAM_DBG(CAM_REQ, "SOF Req[%lld] idx %d req_status %d link_hdl %x",
in_q->slot[in_q->rd_idx].req_id, in_q->rd_idx,
in_q->slot[in_q->rd_idx].status, link->link_hdl);
slot = &in_q->slot[in_q->rd_idx];
if (slot->status == CRM_SLOT_STATUS_NO_REQ) {
CAM_DBG(CAM_CRM, "No Pending req");
rc = 0;
goto error;
}
if ((trigger != CAM_TRIGGER_POINT_SOF) &&
(trigger != CAM_TRIGGER_POINT_EOF))
goto error;
if ((trigger == CAM_TRIGGER_POINT_EOF) &&
(!(link->trigger_mask & CAM_TRIGGER_POINT_SOF))) {
CAM_DBG(CAM_CRM, "Applying for last SOF fails");
rc = -EINVAL;
goto error;
}
if (trigger == CAM_TRIGGER_POINT_SOF) {
if (link->trigger_mask) {
CAM_ERR_RATE_LIMIT(CAM_CRM,
"Applying for last EOF fails");
rc = -EINVAL;
goto error;
}
if (slot->sync_mode == CAM_REQ_MGR_SYNC_MODE_SYNC)
rc = __cam_req_mgr_process_sync_req(link, slot);
else
rc = __cam_req_mgr_check_link_is_ready(link,
slot->idx, false, true);
if (rc < 0) {
/*
* If traverse result is not success, then some devices
* are not ready with packet for the asked request id,
* hence try again in next sof
*/
slot->status = CRM_SLOT_STATUS_REQ_PENDING;
spin_lock_bh(&link->link_state_spin_lock);
if (link->state == CAM_CRM_LINK_STATE_ERR) {
/*
* During error recovery all tables should be
* ready, don't expect to enter here.
* @TODO: gracefully handle if recovery fails.
*/
CAM_ERR_RATE_LIMIT(CAM_CRM,
"FATAL recovery cant finish idx %d status %d",
in_q->rd_idx,
in_q->slot[in_q->rd_idx].status);
rc = -EPERM;
}
spin_unlock_bh(&link->link_state_spin_lock);
goto error;
}
}
rc = __cam_req_mgr_send_req(link, link->req.in_q, trigger);
if (rc < 0) {
/* Apply req failed retry at next sof */
slot->status = CRM_SLOT_STATUS_REQ_PENDING;
} else {
link->trigger_mask |= trigger;
CAM_DBG(CAM_CRM, "Applied req[%lld] on link[%x] success",
slot->req_id, link->link_hdl);
spin_lock_bh(&link->link_state_spin_lock);
if (link->state == CAM_CRM_LINK_STATE_ERR) {
CAM_WARN(CAM_CRM, "Err recovery done idx %d",
in_q->rd_idx);
link->state = CAM_CRM_LINK_STATE_READY;
}
spin_unlock_bh(&link->link_state_spin_lock);
if (link->sync_link_sof_skip)
link->sync_link_sof_skip = false;
if (link->trigger_mask == link->subscribe_event) {
slot->status = CRM_SLOT_STATUS_REQ_APPLIED;
link->trigger_mask = 0;
CAM_DBG(CAM_CRM, "req %d is applied on link %x",
slot->req_id,
link->link_hdl);
idx = in_q->rd_idx;
__cam_req_mgr_dec_idx(
&idx, link->max_delay + 1,
in_q->num_slots);
__cam_req_mgr_reset_req_slot(link, idx);
}
}
mutex_unlock(&session->lock);
return rc;
error:
mutex_unlock(&session->lock);
return rc;
}
/**
* __cam_req_mgr_add_tbl_to_link()
*
* @brief : Add table to list under link sorted by pd decremeting order
* @l_tbl : list of pipeline delay tables.
* @new_tbl : new tbl which will be appended to above list as per its pd value
*
*/
static void __cam_req_mgr_add_tbl_to_link(struct cam_req_mgr_req_tbl **l_tbl,
struct cam_req_mgr_req_tbl *new_tbl)
{
struct cam_req_mgr_req_tbl *tbl;
if (!(*l_tbl) || (*l_tbl)->pd < new_tbl->pd) {
new_tbl->next = *l_tbl;
if (*l_tbl) {
new_tbl->pd_delta =
new_tbl->pd - (*l_tbl)->pd;
}
*l_tbl = new_tbl;
} else {
tbl = *l_tbl;
/* Reach existing tbl which has less pd value */
while (tbl->next != NULL &&
new_tbl->pd < tbl->next->pd) {
tbl = tbl->next;
}
if (tbl->next != NULL) {
new_tbl->pd_delta =
new_tbl->pd - tbl->next->pd;
} else {
/* This is last table in linked list*/
new_tbl->pd_delta = 0;
}
new_tbl->next = tbl->next;
tbl->next = new_tbl;
tbl->pd_delta = tbl->pd - new_tbl->pd;
}
CAM_DBG(CAM_CRM, "added pd %d tbl to link delta %d", new_tbl->pd,
new_tbl->pd_delta);
}
/**
* __cam_req_mgr_create_pd_tbl()
*
* @brief : Creates new request table for new delay value
* @delay : New pd table allocated will have this delay value
*
* @return : pointer to newly allocated table, NULL for failure
*
*/
static struct cam_req_mgr_req_tbl *__cam_req_mgr_create_pd_tbl(int32_t delay)
{
struct cam_req_mgr_req_tbl *tbl =
kzalloc(sizeof(struct cam_req_mgr_req_tbl), GFP_KERNEL);
if (tbl != NULL) {
tbl->num_slots = MAX_REQ_SLOTS;
CAM_DBG(CAM_CRM, "pd= %d slots= %d", delay, tbl->num_slots);
}
return tbl;
}
/**
* __cam_req_mgr_destroy_all_tbl()
*
* @brief : This func will destroy all pipeline delay based req table structs
* @l_tbl : pointer to first table in list and it has max pd .
*
*/
static void __cam_req_mgr_destroy_all_tbl(struct cam_req_mgr_req_tbl **l_tbl)
{
struct cam_req_mgr_req_tbl *tbl = *l_tbl, *temp;
CAM_DBG(CAM_CRM, "*l_tbl %pK", tbl);
while (tbl != NULL) {
temp = tbl->next;
kfree(tbl);
tbl = temp;
}
*l_tbl = NULL;
}
/**
* __cam_req_mgr_setup_in_q()
*
* @brief : Initialize req table data
* @req : request data pointer
*
* @return: 0 for success, negative for failure
*
*/
static int __cam_req_mgr_setup_in_q(struct cam_req_mgr_req_data *req)
{
int i;
struct cam_req_mgr_req_queue *in_q = req->in_q;
if (!in_q) {
CAM_ERR(CAM_CRM, "NULL in_q");
return -EINVAL;
}
mutex_lock(&req->lock);
in_q->num_slots = MAX_REQ_SLOTS;
for (i = 0; i < in_q->num_slots; i++) {
in_q->slot[i].idx = i;
in_q->slot[i].req_id = -1;
in_q->slot[i].skip_idx = 0;
in_q->slot[i].status = CRM_SLOT_STATUS_NO_REQ;
}
in_q->wr_idx = 0;
in_q->rd_idx = 0;
mutex_unlock(&req->lock);
return 0;
}
/**
* __cam_req_mgr_reset_req_tbl()
*
* @brief : Initialize req table data
* @req : request queue pointer
*
* @return: 0 for success, negative for failure
*
*/
static int __cam_req_mgr_reset_in_q(struct cam_req_mgr_req_data *req)
{
struct cam_req_mgr_req_queue *in_q = req->in_q;
if (!in_q) {
CAM_ERR(CAM_CRM, "NULL in_q");
return -EINVAL;
}
mutex_lock(&req->lock);
memset(in_q->slot, 0,
sizeof(struct cam_req_mgr_slot) * in_q->num_slots);
in_q->num_slots = 0;
in_q->wr_idx = 0;
in_q->rd_idx = 0;
mutex_unlock(&req->lock);
return 0;
}
/**
* __cam_req_mgr_notify_sof_freeze()
*
* @brief : Notify devices on link on detecting a SOF freeze
* @link : link on which the sof freeze was detected
*
*/
static void __cam_req_mgr_notify_sof_freeze(
struct cam_req_mgr_core_link *link)
{
int i = 0;
struct cam_req_mgr_link_evt_data evt_data;
struct cam_req_mgr_connected_device *dev = NULL;
for (i = 0; i < link->num_devs; i++) {
dev = &link->l_dev[i];
evt_data.evt_type = CAM_REQ_MGR_LINK_EVT_SOF_FREEZE;
evt_data.dev_hdl = dev->dev_hdl;
evt_data.link_hdl = link->link_hdl;
evt_data.req_id = 0;
evt_data.u.error = CRM_KMD_ERR_FATAL;
if (dev->ops && dev->ops->process_evt)
dev->ops->process_evt(&evt_data);
}
}
/**
* __cam_req_mgr_process_sof_freeze()
*
* @brief : Apoptosis - Handles case when connected devices are not responding
* @priv : link information
* @data : task data
*
*/
static int __cam_req_mgr_process_sof_freeze(void *priv, void *data)
{
struct cam_req_mgr_core_link *link = NULL;
struct cam_req_mgr_core_session *session = NULL;
struct cam_req_mgr_message msg;
int rc = 0;
if (!data || !priv) {
CAM_ERR(CAM_CRM, "input args NULL %pK %pK", data, priv);
return -EINVAL;
}
link = (struct cam_req_mgr_core_link *)priv;
session = (struct cam_req_mgr_core_session *)link->parent;
CAM_ERR(CAM_CRM, "SOF freeze for session %d link 0x%x",
session->session_hdl, link->link_hdl);
__cam_req_mgr_notify_sof_freeze(link);
memset(&msg, 0, sizeof(msg));
msg.session_hdl = session->session_hdl;
msg.u.err_msg.error_type = CAM_REQ_MGR_ERROR_TYPE_DEVICE;
msg.u.err_msg.request_id = 0;
msg.u.err_msg.link_hdl = link->link_hdl;
rc = cam_req_mgr_notify_message(&msg,
V4L_EVENT_CAM_REQ_MGR_ERROR, V4L_EVENT_CAM_REQ_MGR_EVENT);
if (rc)
CAM_ERR(CAM_CRM,
"Error notifying SOF freeze for session %d link 0x%x rc %d",
session->session_hdl, link->link_hdl, rc);
return rc;
}
/**
* __cam_req_mgr_sof_freeze()
*
* @brief : Callback function for timer timeout indicating SOF freeze
* @data : timer pointer
*
*/
static void __cam_req_mgr_sof_freeze(unsigned long data)
{
struct cam_req_mgr_timer *timer = (struct cam_req_mgr_timer *)data;
struct crm_workq_task *task = NULL;
struct cam_req_mgr_core_link *link = NULL;
struct crm_task_payload *task_data;
if (!timer) {
CAM_ERR(CAM_CRM, "NULL timer");
return;
}
link = (struct cam_req_mgr_core_link *)timer->parent;
task = cam_req_mgr_workq_get_task(link->workq);
if (!task) {
CAM_ERR(CAM_CRM, "No empty task");
return;
}
task_data = (struct crm_task_payload *)task->payload;
task_data->type = CRM_WORKQ_TASK_NOTIFY_FREEZE;
task->process_cb = &__cam_req_mgr_process_sof_freeze;
cam_req_mgr_workq_enqueue_task(task, link, CRM_TASK_PRIORITY_0);
}
/**
* __cam_req_mgr_create_subdevs()
*
* @brief : Create new crm subdev to link with realtime devices
* @l_dev : list of subdevs internal to crm
* @num_dev : num of subdevs to be created for link
*
* @return : pointer to allocated list of devices
*/
static int __cam_req_mgr_create_subdevs(
struct cam_req_mgr_connected_device **l_dev, int32_t num_dev)
{
int rc = 0;
*l_dev = (struct cam_req_mgr_connected_device *)
kzalloc(sizeof(struct cam_req_mgr_connected_device) * num_dev,
GFP_KERNEL);
if (!*l_dev)
rc = -ENOMEM;
return rc;
}
/**
* __cam_req_mgr_destroy_subdev()
*
* @brief : Cleans up the subdevs allocated by crm for link
* @l_device : pointer to list of subdevs crm created
*
*/
static void __cam_req_mgr_destroy_subdev(
struct cam_req_mgr_connected_device *l_device)
{
kfree(l_device);
l_device = NULL;
}
/**
* __cam_req_mgr_destroy_link_info()
*
* @brief : Cleans up the mem allocated while linking
* @link : pointer to link, mem associated with this link is freed
*
* @return : returns if unlink for any device was success or failure
*/
static int __cam_req_mgr_destroy_link_info(struct cam_req_mgr_core_link *link)
{
int32_t i = 0;
struct cam_req_mgr_connected_device *dev;
struct cam_req_mgr_core_dev_link_setup link_data;
int rc = 0;
link_data.link_enable = 0;
link_data.link_hdl = link->link_hdl;
link_data.crm_cb = NULL;
link_data.subscribe_event = 0;
/* Using device ops unlink devices */
for (i = 0; i < link->num_devs; i++) {
dev = &link->l_dev[i];
if (dev != NULL) {
link_data.dev_hdl = dev->dev_hdl;
if (dev->ops && dev->ops->link_setup) {
rc = dev->ops->link_setup(&link_data);
if (rc)
CAM_ERR(CAM_CRM,
"Unlink failed dev name %s hdl %x",
dev->dev_info.name,
dev->dev_hdl);
}
dev->dev_hdl = 0;
dev->parent = NULL;
dev->ops = NULL;
}
}
__cam_req_mgr_destroy_all_tbl(&link->req.l_tbl);
__cam_req_mgr_reset_in_q(&link->req);
link->req.num_tbl = 0;
mutex_destroy(&link->req.lock);
link->pd_mask = 0;
link->num_devs = 0;
link->max_delay = 0;
return rc;
}
/**
* __cam_req_mgr_reserve_link()
*
* @brief: Reserves one link data struct within session
* @session: session identifier
*
* @return: pointer to link reserved
*
*/
static struct cam_req_mgr_core_link *__cam_req_mgr_reserve_link(
struct cam_req_mgr_core_session *session)
{
struct cam_req_mgr_core_link *link;
struct cam_req_mgr_req_queue *in_q;
int i;
if (!session || !g_crm_core_dev) {
CAM_ERR(CAM_CRM, "NULL session/core_dev ptr");
return NULL;
}
if (session->num_links >= MAXIMUM_LINKS_PER_SESSION) {
CAM_ERR(CAM_CRM, "Reached max links %d per session limit %d",
session->num_links, MAXIMUM_LINKS_PER_SESSION);
return NULL;
}
link = (struct cam_req_mgr_core_link *)
kzalloc(sizeof(struct cam_req_mgr_core_link), GFP_KERNEL);
if (!link) {
CAM_ERR(CAM_CRM, "failed to create link, no mem");
return NULL;
}
in_q = (struct cam_req_mgr_req_queue *)
kzalloc(sizeof(struct cam_req_mgr_req_queue), GFP_KERNEL);
if (!in_q) {
CAM_ERR(CAM_CRM, "failed to create input queue, no mem");
kfree(link);
return NULL;
}
mutex_init(&link->lock);
spin_lock_init(&link->link_state_spin_lock);
mutex_lock(&link->lock);
link->state = CAM_CRM_LINK_STATE_AVAILABLE;
link->num_devs = 0;
link->max_delay = 0;
memset(in_q->slot, 0,
sizeof(struct cam_req_mgr_slot) * MAX_REQ_SLOTS);
link->req.in_q = in_q;
in_q->num_slots = 0;
link->state = CAM_CRM_LINK_STATE_IDLE;
link->parent = (void *)session;
link->sync_link = NULL;
mutex_unlock(&link->lock);
mutex_lock(&session->lock);
/* Loop through and find a free index */
for (i = 0; i < MAXIMUM_LINKS_PER_SESSION; i++) {
if (!session->links[i]) {
CAM_DBG(CAM_CRM,
"Free link index %d found, num_links=%d",
i, session->num_links);
session->links[i] = link;
break;
}
}
if (i == MAXIMUM_LINKS_PER_SESSION) {
CAM_ERR(CAM_CRM, "Free link index not found");
goto error;
}
session->num_links++;
CAM_DBG(CAM_CRM, "Active session links (%d)",
session->num_links);
mutex_unlock(&session->lock);
return link;
error:
mutex_unlock(&session->lock);
kfree(link);
kfree(in_q);
return NULL;
}
/*
* __cam_req_mgr_free_link()
*
* @brief: Frees the link and its request queue
*
* @link: link identifier
*
*/
static void __cam_req_mgr_free_link(struct cam_req_mgr_core_link *link)
{
kfree(link->req.in_q);
link->req.in_q = NULL;
kfree(link);
}
/**
* __cam_req_mgr_unreserve_link()
*
* @brief : Removes the link data struct from the session and frees it
* @session: session identifier
* @link : link identifier
*
*/
static void __cam_req_mgr_unreserve_link(
struct cam_req_mgr_core_session *session,
struct cam_req_mgr_core_link *link)
{
int i;
if (!session || !link) {
CAM_ERR(CAM_CRM, "NULL session/link ptr %pK %pK",
session, link);
return;
}
mutex_lock(&session->lock);
if (!session->num_links) {
CAM_WARN(CAM_CRM, "No active link or invalid state: hdl %x",
link->link_hdl);
mutex_unlock(&session->lock);
return;
}
for (i = 0; i < MAXIMUM_LINKS_PER_SESSION; i++) {
if (session->links[i] == link)
session->links[i] = NULL;
}
if ((session->sync_mode != CAM_REQ_MGR_SYNC_MODE_NO_SYNC) &&
(link->sync_link)) {
/*
* make sure to unlink sync setup under the assumption
* of only having 2 links in a given session
*/
session->sync_mode = CAM_REQ_MGR_SYNC_MODE_NO_SYNC;
for (i = 0; i < MAXIMUM_LINKS_PER_SESSION; i++) {
if (session->links[i])
session->links[i]->sync_link = NULL;
}
}
session->num_links--;
CAM_DBG(CAM_CRM, "Active session links (%d)", session->num_links);
mutex_unlock(&session->lock);
__cam_req_mgr_free_link(link);
}
/* Workqueue context processing section */
/**
* cam_req_mgr_process_send_req()
*
* @brief: This runs in workque thread context. Call core funcs to send
* apply request id to drivers.
* @priv : link information.
* @data : contains information about frame_id, link etc.
*
* @return: 0 on success.
*/
int cam_req_mgr_process_send_req(void *priv, void *data)
{
int rc = 0;
struct cam_req_mgr_core_link *link = NULL;
struct cam_req_mgr_send_request *send_req = NULL;
struct cam_req_mgr_req_queue *in_q = NULL;
if (!data || !priv) {
CAM_ERR(CAM_CRM, "input args NULL %pK %pK", data, priv);
rc = -EINVAL;
goto end;
}
link = (struct cam_req_mgr_core_link *)priv;
send_req = (struct cam_req_mgr_send_request *)data;
in_q = send_req->in_q;
rc = __cam_req_mgr_send_req(link, in_q, CAM_TRIGGER_POINT_SOF);
end:
return rc;
}
/**
* cam_req_mgr_process_flush_req()
*
* @brief: This runs in workque thread context. Call core funcs to check
* which requests need to be removed/cancelled.
* @priv : link information.
* @data : contains information about frame_id, link etc.
*
* @return: 0 on success.
*/
int cam_req_mgr_process_flush_req(void *priv, void *data)
{
int rc = 0, i = 0, idx = -1;
struct cam_req_mgr_flush_info *flush_info = NULL;
struct cam_req_mgr_core_link *link = NULL;
struct cam_req_mgr_req_queue *in_q = NULL;
struct cam_req_mgr_slot *slot = NULL;
struct cam_req_mgr_connected_device *device = NULL;
struct cam_req_mgr_flush_request flush_req;
struct crm_task_payload *task_data = NULL;
if (!data || !priv) {
CAM_ERR(CAM_CRM, "input args NULL %pK %pK", data, priv);
rc = -EINVAL;
goto end;
}
link = (struct cam_req_mgr_core_link *)priv;
task_data = (struct crm_task_payload *)data;
flush_info = (struct cam_req_mgr_flush_info *)&task_data->u;
CAM_DBG(CAM_REQ, "link_hdl %x req_id %lld type %d",
flush_info->link_hdl,
flush_info->req_id,
flush_info->flush_type);
in_q = link->req.in_q;
trace_cam_flush_req(link, flush_info);
mutex_lock(&link->req.lock);
if (flush_info->flush_type == CAM_REQ_MGR_FLUSH_TYPE_ALL) {
for (i = 0; i < in_q->num_slots; i++) {
slot = &in_q->slot[i];
slot->req_id = -1;
slot->sync_mode = CAM_REQ_MGR_SYNC_MODE_NO_SYNC;
slot->skip_idx = 1;
slot->status = CRM_SLOT_STATUS_NO_REQ;
}
in_q->wr_idx = 0;
in_q->rd_idx = 0;
} else if (flush_info->flush_type ==
CAM_REQ_MGR_FLUSH_TYPE_CANCEL_REQ) {
idx = __cam_req_mgr_find_slot_for_req(in_q, flush_info->req_id);
if (idx < 0) {
CAM_ERR(CAM_CRM, "req_id %lld not found in input queue",
flush_info->req_id);
mutex_unlock(&link->req.lock);
return -EINVAL;
} else {
CAM_DBG(CAM_CRM, "req_id %lld found at idx %d",
flush_info->req_id, idx);
slot = &in_q->slot[idx];
if (slot->status == CRM_SLOT_STATUS_REQ_PENDING ||
slot->status == CRM_SLOT_STATUS_REQ_APPLIED) {
CAM_WARN(CAM_CRM,
"req_id %lld can not be cancelled",
flush_info->req_id);
mutex_unlock(&link->req.lock);
return -EINVAL;
}
__cam_req_mgr_in_q_skip_idx(in_q, idx);
}
}
for (i = 0; i < link->num_devs; i++) {
device = &link->l_dev[i];
flush_req.link_hdl = flush_info->link_hdl;
flush_req.dev_hdl = device->dev_hdl;
flush_req.req_id = flush_info->req_id;
flush_req.type = flush_info->flush_type;
/* @TODO: error return handling from drivers */
if (device->ops && device->ops->flush_req)
rc = device->ops->flush_req(&flush_req);
}
complete(&link->workq_comp);
mutex_unlock(&link->req.lock);
end:
return rc;
}
/**
* cam_req_mgr_process_sched_req()
*
* @brief: This runs in workque thread context. Call core funcs to check
* which peding requests can be processed.
* @priv : link information.
* @data : contains information about frame_id, link etc.
*
* @return: 0 on success.
*/
int cam_req_mgr_process_sched_req(void *priv, void *data)
{
int rc = 0;
struct cam_req_mgr_sched_request *sched_req = NULL;
struct cam_req_mgr_core_link *link = NULL;
struct cam_req_mgr_req_queue *in_q = NULL;
struct cam_req_mgr_slot *slot = NULL;
struct crm_task_payload *task_data = NULL;
if (!data || !priv) {
CAM_ERR(CAM_CRM, "input args NULL %pK %pK", data, priv);
rc = -EINVAL;
goto end;
}
link = (struct cam_req_mgr_core_link *)priv;
task_data = (struct crm_task_payload *)data;
sched_req = (struct cam_req_mgr_sched_request *)&task_data->u;
in_q = link->req.in_q;
CAM_DBG(CAM_CRM, "link_hdl %x req_id %lld at slot %d sync_mode %d",
sched_req->link_hdl, sched_req->req_id,
in_q->wr_idx, sched_req->sync_mode);
mutex_lock(&link->req.lock);
slot = &in_q->slot[in_q->wr_idx];
if (slot->status != CRM_SLOT_STATUS_NO_REQ &&
slot->status != CRM_SLOT_STATUS_REQ_APPLIED)
CAM_WARN(CAM_CRM, "in_q overwrite %d", slot->status);
slot->status = CRM_SLOT_STATUS_REQ_ADDED;
slot->req_id = sched_req->req_id;
slot->sync_mode = sched_req->sync_mode;
slot->skip_idx = 0;
slot->recover = sched_req->bubble_enable;
link->open_req_cnt++;
__cam_req_mgr_inc_idx(&in_q->wr_idx, 1, in_q->num_slots);
mutex_unlock(&link->req.lock);
end:
return rc;
}
/**
* cam_req_mgr_process_add_req()
*
* @brief: This runs in workque thread context. Call core funcs to check
* which peding requests can be processed.
* @priv : link information.
* @data : contains information about frame_id, link etc.
*
* @return: 0 on success.
*/
int cam_req_mgr_process_add_req(void *priv, void *data)
{
int rc = 0, i = 0, idx;
struct cam_req_mgr_add_request *add_req = NULL;
struct cam_req_mgr_core_link *link = NULL;
struct cam_req_mgr_connected_device *device = NULL;
struct cam_req_mgr_req_tbl *tbl = NULL;
struct cam_req_mgr_tbl_slot *slot = NULL;
struct crm_task_payload *task_data = NULL;
if (!data || !priv) {
CAM_ERR(CAM_CRM, "input args NULL %pK %pK", data, priv);
rc = -EINVAL;
goto end;
}
link = (struct cam_req_mgr_core_link *)priv;
task_data = (struct crm_task_payload *)data;
add_req = (struct cam_req_mgr_add_request *)&task_data->u;
for (i = 0; i < link->num_devs; i++) {
device = &link->l_dev[i];
if (device->dev_hdl == add_req->dev_hdl) {
tbl = device->pd_tbl;
break;
}
}
if (!tbl) {
CAM_ERR_RATE_LIMIT(CAM_CRM, "dev_hdl not found %x, %x %x",
add_req->dev_hdl,
link->l_dev[0].dev_hdl,
link->l_dev[1].dev_hdl);
rc = -EINVAL;
goto end;
}
/*
* Go through request table and add
* request id to proper table
* 1. find req slot in in_q matching req_id.sent by dev
* 2. goto table of this device based on p_delay
* 3. mark req_ready_map with this dev_bit.
*/
mutex_lock(&link->req.lock);
idx = __cam_req_mgr_find_slot_for_req(link->req.in_q, add_req->req_id);
if (idx < 0) {
CAM_ERR(CAM_CRM, "req %lld not found in in_q", add_req->req_id);
rc = -EBADSLT;
mutex_unlock(&link->req.lock);
goto end;
}
slot = &tbl->slot[idx];
if (add_req->skip_before_applying > slot->inject_delay) {
slot->inject_delay = add_req->skip_before_applying;
CAM_DBG(CAM_CRM, "Req_id %llu injecting delay %u",
add_req->req_id, add_req->skip_before_applying);
}
if (slot->state != CRM_REQ_STATE_PENDING &&
slot->state != CRM_REQ_STATE_EMPTY) {
CAM_WARN(CAM_CRM, "Unexpected state %d for slot %d map %x",
slot->state, idx, slot->req_ready_map);
}
slot->state = CRM_REQ_STATE_PENDING;
slot->req_ready_map |= (1 << device->dev_bit);
CAM_DBG(CAM_CRM, "idx %d dev_hdl %x req_id %lld pd %d ready_map %x",
idx, add_req->dev_hdl, add_req->req_id, tbl->pd,
slot->req_ready_map);
trace_cam_req_mgr_add_req(link, idx, add_req, tbl, device);
if (slot->req_ready_map == tbl->dev_mask) {
CAM_DBG(CAM_REQ, "idx %d req_id %lld pd %d SLOT READY",
idx, add_req->req_id, tbl->pd);
slot->state = CRM_REQ_STATE_READY;
}
mutex_unlock(&link->req.lock);
end:
return rc;
}
/**
* cam_req_mgr_process_error()
*
* @brief: This runs in workque thread context. bubble /err recovery.
* @priv : link information.
* @data : contains information about frame_id, link etc.
*
* @return: 0 on success.
*/
int cam_req_mgr_process_error(void *priv, void *data)
{
int rc = 0, idx = -1, i;
struct cam_req_mgr_error_notify *err_info = NULL;
struct cam_req_mgr_core_link *link = NULL;
struct cam_req_mgr_req_queue *in_q = NULL;
struct cam_req_mgr_slot *slot = NULL;
struct cam_req_mgr_connected_device *device = NULL;
struct cam_req_mgr_link_evt_data evt_data;
struct crm_task_payload *task_data = NULL;
if (!data || !priv) {
CAM_ERR(CAM_CRM, "input args NULL %pK %pK", data, priv);
rc = -EINVAL;
goto end;
}
link = (struct cam_req_mgr_core_link *)priv;
task_data = (struct crm_task_payload *)data;
err_info = (struct cam_req_mgr_error_notify *)&task_data->u;
CAM_DBG(CAM_CRM, "link_hdl %x req_id %lld error %d",
err_info->link_hdl,
err_info->req_id,
err_info->error);
in_q = link->req.in_q;
mutex_lock(&link->req.lock);
if (err_info->error == CRM_KMD_ERR_BUBBLE) {
idx = __cam_req_mgr_find_slot_for_req(in_q, err_info->req_id);
if (idx < 0) {
CAM_ERR_RATE_LIMIT(CAM_CRM,
"req_id %lld not found in input queue",
err_info->req_id);
} else {
CAM_DBG(CAM_CRM, "req_id %lld found at idx %d",
err_info->req_id, idx);
slot = &in_q->slot[idx];
if (!slot->recover) {
CAM_WARN(CAM_CRM,
"err recovery disabled req_id %lld",
err_info->req_id);
mutex_unlock(&link->req.lock);
return 0;
} else if (slot->status != CRM_SLOT_STATUS_REQ_PENDING
&& slot->status != CRM_SLOT_STATUS_REQ_APPLIED) {
CAM_WARN(CAM_CRM,
"req_id %lld can not be recovered %d",
err_info->req_id, slot->status);
mutex_unlock(&link->req.lock);
return -EINVAL;
}
/* Notify all devices in the link about error */
for (i = 0; i < link->num_devs; i++) {
device = &link->l_dev[i];
if (device != NULL) {
evt_data.dev_hdl = device->dev_hdl;
evt_data.evt_type =
CAM_REQ_MGR_LINK_EVT_ERR;
evt_data.link_hdl = link->link_hdl;
evt_data.req_id = err_info->req_id;
evt_data.u.error = err_info->error;
if (device->ops &&
device->ops->process_evt)
rc = device->ops->process_evt(
&evt_data);
}
}
/* Bring processing pointer to bubbled req id */
__cam_req_mgr_tbl_set_all_skip_cnt(&link->req.l_tbl);
in_q->rd_idx = idx;
in_q->slot[idx].status = CRM_SLOT_STATUS_REQ_ADDED;
spin_lock_bh(&link->link_state_spin_lock);
link->state = CAM_CRM_LINK_STATE_ERR;
spin_unlock_bh(&link->link_state_spin_lock);
}
}
mutex_unlock(&link->req.lock);
end:
return rc;
}
/**
* cam_req_mgr_process_trigger()
*
* @brief: This runs in workque thread context. Call core funcs to check
* which peding requests can be processed.
* @priv : link information.
* @data : contains information about frame_id, link etc.
*
* @return: 0 on success.
*/
static int cam_req_mgr_process_trigger(void *priv, void *data)
{
int rc = 0;
struct cam_req_mgr_trigger_notify *trigger_data = NULL;
struct cam_req_mgr_core_link *link = NULL;
struct cam_req_mgr_req_queue *in_q = NULL;
struct crm_task_payload *task_data = NULL;
if (!data || !priv) {
CAM_ERR(CAM_CRM, "input args NULL %pK %pK", data, priv);
rc = -EINVAL;
goto end;
}
link = (struct cam_req_mgr_core_link *)priv;
task_data = (struct crm_task_payload *)data;
trigger_data = (struct cam_req_mgr_trigger_notify *)&task_data->u;
CAM_DBG(CAM_REQ, "link_hdl %x frame_id %lld, trigger %x\n",
trigger_data->link_hdl,
trigger_data->frame_id,
trigger_data->trigger);
in_q = link->req.in_q;
mutex_lock(&link->req.lock);
/*
* Check if current read index is in applied state, if yes make it free
* and increment read index to next slot.
*/
CAM_DBG(CAM_CRM, "link_hdl %x curent idx %d req_status %d",
link->link_hdl, in_q->rd_idx, in_q->slot[in_q->rd_idx].status);
spin_lock_bh(&link->link_state_spin_lock);
if (link->state == CAM_CRM_LINK_STATE_ERR)
CAM_WARN(CAM_CRM, "Error recovery idx %d status %d",
in_q->rd_idx,
in_q->slot[in_q->rd_idx].status);
spin_unlock_bh(&link->link_state_spin_lock);
if (in_q->slot[in_q->rd_idx].status == CRM_SLOT_STATUS_REQ_APPLIED) {
/*
* Do NOT reset req q slot data here, it can not be done
* here because we need to preserve the data to handle bubble.
*
* Check if any new req is pending in slot, if not finish the
* lower pipeline delay device with available req ids.
*/
CAM_DBG(CAM_CRM, "link[%x] Req[%lld] invalidating slot",
link->link_hdl, in_q->slot[in_q->rd_idx].req_id);
__cam_req_mgr_check_next_req_slot(in_q);
__cam_req_mgr_inc_idx(&in_q->rd_idx, 1, in_q->num_slots);
}
rc = __cam_req_mgr_process_req(link, trigger_data->trigger);
mutex_unlock(&link->req.lock);
end:
return rc;
}
/**
* __cam_req_mgr_dev_handle_to_name()
*
* @brief : Finds device name based on the device handle
* @dev_hdl : Device handle whose name is to be found
* @link : Link on which the device is connected
* @return : String containing the device name
*
*/
static const char *__cam_req_mgr_dev_handle_to_name(
int32_t dev_hdl, struct cam_req_mgr_core_link *link)
{
struct cam_req_mgr_connected_device *dev = NULL;
int i = 0;
for (i = 0; i < link->num_devs; i++) {
dev = &link->l_dev[i];
if (dev_hdl == dev->dev_hdl)
return dev->dev_info.name;
}
return "Invalid dev_hdl";
}
/* Linked devices' Callback section */
/**
* cam_req_mgr_cb_add_req()
*
* @brief : Drivers call this function to notify new packet is available.
* @add_req : Information about new request available at a device.
*
* @return : 0 on success, negative in case of failure
*
*/
static int cam_req_mgr_cb_add_req(struct cam_req_mgr_add_request *add_req)
{
int rc = 0, idx;
struct crm_workq_task *task = NULL;
struct cam_req_mgr_core_link *link = NULL;
struct cam_req_mgr_add_request *dev_req;
struct crm_task_payload *task_data;
if (!add_req) {
CAM_ERR(CAM_CRM, "sof_data is NULL");
return -EINVAL;
}
link = (struct cam_req_mgr_core_link *)
cam_get_device_priv(add_req->link_hdl);
if (!link) {
CAM_DBG(CAM_CRM, "link ptr NULL %x", add_req->link_hdl);
return -EINVAL;
}
CAM_DBG(CAM_REQ, "dev name %s dev_hdl %d dev req %lld",
__cam_req_mgr_dev_handle_to_name(add_req->dev_hdl, link),
add_req->dev_hdl, add_req->req_id);
mutex_lock(&link->lock);
spin_lock_bh(&link->link_state_spin_lock);
if (link->state < CAM_CRM_LINK_STATE_READY) {
CAM_WARN(CAM_CRM, "invalid link state:%d", link->state);
rc = -EPERM;
spin_unlock_bh(&link->link_state_spin_lock);
goto end;
}
spin_unlock_bh(&link->link_state_spin_lock);
/* Validate if req id is present in input queue */
idx = __cam_req_mgr_find_slot_for_req(link->req.in_q, add_req->req_id);
if (idx < 0) {
CAM_ERR(CAM_CRM, "req %lld not found in in_q", add_req->req_id);
rc = -ENOENT;
goto end;
}
task = cam_req_mgr_workq_get_task(link->workq);
if (!task) {
CAM_ERR_RATE_LIMIT(CAM_CRM, "no empty task dev %x req %lld",
add_req->dev_hdl, add_req->req_id);
rc = -EBUSY;
goto end;
}
task_data = (struct crm_task_payload *)task->payload;
task_data->type = CRM_WORKQ_TASK_DEV_ADD_REQ;
dev_req = (struct cam_req_mgr_add_request *)&task_data->u;
dev_req->req_id = add_req->req_id;
dev_req->link_hdl = add_req->link_hdl;
dev_req->dev_hdl = add_req->dev_hdl;
dev_req->skip_before_applying = add_req->skip_before_applying;
task->process_cb = &cam_req_mgr_process_add_req;
rc = cam_req_mgr_workq_enqueue_task(task, link, CRM_TASK_PRIORITY_0);
CAM_DBG(CAM_CRM, "X: dev %x dev req %lld",
add_req->dev_hdl, add_req->req_id);
end:
mutex_unlock(&link->lock);
return rc;
}
/**
* cam_req_mgr_cb_notify_err()
*
* @brief : Error received from device, sends bubble recovery
* @err_info : contains information about error occurred like bubble/overflow
*
* @return : 0 on success, negative in case of failure
*
*/
static int cam_req_mgr_cb_notify_err(
struct cam_req_mgr_error_notify *err_info)
{
int rc = 0;
struct crm_workq_task *task = NULL;
struct cam_req_mgr_core_link *link = NULL;
struct cam_req_mgr_error_notify *notify_err;
struct crm_task_payload *task_data;
if (!err_info) {
CAM_ERR(CAM_CRM, "err_info is NULL");
rc = -EINVAL;
goto end;
}
link = (struct cam_req_mgr_core_link *)
cam_get_device_priv(err_info->link_hdl);
if (!link) {
CAM_DBG(CAM_CRM, "link ptr NULL %x", err_info->link_hdl);
rc = -EINVAL;
goto end;
}
spin_lock_bh(&link->link_state_spin_lock);
if (link->state != CAM_CRM_LINK_STATE_READY) {
CAM_WARN(CAM_CRM, "invalid link state:%d", link->state);
spin_unlock_bh(&link->link_state_spin_lock);
rc = -EPERM;
goto end;
}
crm_timer_reset(link->watchdog);
spin_unlock_bh(&link->link_state_spin_lock);
task = cam_req_mgr_workq_get_task(link->workq);
if (!task) {
CAM_ERR(CAM_CRM, "no empty task req_id %lld", err_info->req_id);
rc = -EBUSY;
goto end;
}
task_data = (struct crm_task_payload *)task->payload;
task_data->type = CRM_WORKQ_TASK_NOTIFY_ERR;
notify_err = (struct cam_req_mgr_error_notify *)&task_data->u;
notify_err->req_id = err_info->req_id;
notify_err->link_hdl = err_info->link_hdl;
notify_err->dev_hdl = err_info->dev_hdl;
notify_err->error = err_info->error;
task->process_cb = &cam_req_mgr_process_error;
rc = cam_req_mgr_workq_enqueue_task(task, link, CRM_TASK_PRIORITY_0);
end:
return rc;
}
/**
* cam_req_mgr_cb_notify_trigger()
*
* @brief : SOF received from device, sends trigger through workqueue
* @sof_data: contains information about frame_id, link etc.
*
* @return : 0 on success
*
*/
static int cam_req_mgr_cb_notify_trigger(
struct cam_req_mgr_trigger_notify *trigger_data)
{
int rc = 0;
struct crm_workq_task *task = NULL;
struct cam_req_mgr_core_link *link = NULL;
struct cam_req_mgr_trigger_notify *notify_trigger;
struct crm_task_payload *task_data;
if (!trigger_data) {
CAM_ERR(CAM_CRM, "sof_data is NULL");
rc = -EINVAL;
goto end;
}
link = (struct cam_req_mgr_core_link *)
cam_get_device_priv(trigger_data->link_hdl);
if (!link) {
CAM_DBG(CAM_CRM, "link ptr NULL %x", trigger_data->link_hdl);
rc = -EINVAL;
goto end;
}
spin_lock_bh(&link->link_state_spin_lock);
if (link->state < CAM_CRM_LINK_STATE_READY) {
CAM_WARN(CAM_CRM, "invalid link state:%d", link->state);
spin_unlock_bh(&link->link_state_spin_lock);
rc = -EPERM;
goto end;
}
crm_timer_reset(link->watchdog);
spin_unlock_bh(&link->link_state_spin_lock);
task = cam_req_mgr_workq_get_task(link->workq);
if (!task) {
CAM_ERR(CAM_CRM, "no empty task frame %lld",
trigger_data->frame_id);
rc = -EBUSY;
goto end;
}
task_data = (struct crm_task_payload *)task->payload;
task_data->type = CRM_WORKQ_TASK_NOTIFY_SOF;
notify_trigger = (struct cam_req_mgr_trigger_notify *)&task_data->u;
notify_trigger->frame_id = trigger_data->frame_id;
notify_trigger->link_hdl = trigger_data->link_hdl;
notify_trigger->dev_hdl = trigger_data->dev_hdl;
notify_trigger->trigger = trigger_data->trigger;
task->process_cb = &cam_req_mgr_process_trigger;
rc = cam_req_mgr_workq_enqueue_task(task, link, CRM_TASK_PRIORITY_0);
end:
return rc;
}
static struct cam_req_mgr_crm_cb cam_req_mgr_ops = {
.notify_trigger = cam_req_mgr_cb_notify_trigger,
.notify_err = cam_req_mgr_cb_notify_err,
.add_req = cam_req_mgr_cb_add_req,
};
/**
* __cam_req_mgr_setup_link_info()
*
* @brief : Sets up input queue, create pd based tables, communicate with
* devs connected on this link and setup communication.
* @link : pointer to link to setup
* @link_info : link_info coming from CSL to prepare link
*
* @return : 0 on success, negative in case of failure
*
*/
static int __cam_req_mgr_setup_link_info(struct cam_req_mgr_core_link *link,
struct cam_req_mgr_link_info *link_info)
{
int rc = 0, i = 0;
struct cam_req_mgr_core_dev_link_setup link_data;
struct cam_req_mgr_connected_device *dev;
struct cam_req_mgr_req_tbl *pd_tbl;
enum cam_pipeline_delay max_delay;
uint32_t subscribe_event = 0;
if (link_info->num_devices > CAM_REQ_MGR_MAX_HANDLES)
return -EPERM;
mutex_init(&link->req.lock);
CAM_DBG(CAM_CRM, "LOCK_DBG in_q lock %pK", &link->req.lock);
link->req.num_tbl = 0;
rc = __cam_req_mgr_setup_in_q(&link->req);
if (rc < 0)
return rc;
max_delay = CAM_PIPELINE_DELAY_0;
for (i = 0; i < link_info->num_devices; i++) {
dev = &link->l_dev[i];
/* Using dev hdl, get ops ptr to communicate with device */
dev->ops = (struct cam_req_mgr_kmd_ops *)
cam_get_device_ops(link_info->dev_hdls[i]);
if (!dev->ops ||
!dev->ops->get_dev_info ||
!dev->ops->link_setup) {
CAM_ERR(CAM_CRM, "FATAL: device ops NULL");
rc = -ENXIO;
goto error;
}
dev->dev_hdl = link_info->dev_hdls[i];
dev->parent = (void *)link;
dev->dev_info.dev_hdl = dev->dev_hdl;
rc = dev->ops->get_dev_info(&dev->dev_info);
trace_cam_req_mgr_connect_device(link, &dev->dev_info);
CAM_DBG(CAM_CRM,
"%x: connected: %s, id %d, delay %d, trigger %x",
link_info->session_hdl, dev->dev_info.name,
dev->dev_info.dev_id, dev->dev_info.p_delay,
dev->dev_info.trigger);
if (rc < 0 ||
dev->dev_info.p_delay >=
CAM_PIPELINE_DELAY_MAX ||
dev->dev_info.p_delay <
CAM_PIPELINE_DELAY_0) {
CAM_ERR(CAM_CRM, "get device info failed");
goto error;
} else {
CAM_DBG(CAM_CRM, "%x: connected: %s, delay %d",
link_info->session_hdl,
dev->dev_info.name,
dev->dev_info.p_delay);
if (dev->dev_info.p_delay > max_delay)
max_delay = dev->dev_info.p_delay;
subscribe_event |= (uint32_t)dev->dev_info.trigger;
}
}
link->subscribe_event = subscribe_event;
link_data.link_enable = 1;
link_data.link_hdl = link->link_hdl;
link_data.crm_cb = &cam_req_mgr_ops;
link_data.max_delay = max_delay;
link_data.subscribe_event = subscribe_event;
for (i = 0; i < link_info->num_devices; i++) {
dev = &link->l_dev[i];
link_data.dev_hdl = dev->dev_hdl;
/*
* For unique pipeline delay table create request
* tracking table
*/
if (link->pd_mask & (1 << dev->dev_info.p_delay)) {
pd_tbl = __cam_req_mgr_find_pd_tbl(link->req.l_tbl,
dev->dev_info.p_delay);
if (!pd_tbl) {
CAM_ERR(CAM_CRM, "pd %d tbl not found",
dev->dev_info.p_delay);
rc = -ENXIO;
goto error;
}
} else {
pd_tbl = __cam_req_mgr_create_pd_tbl(
dev->dev_info.p_delay);
if (pd_tbl == NULL) {
CAM_ERR(CAM_CRM, "create new pd tbl failed");
rc = -ENXIO;
goto error;
}
pd_tbl->pd = dev->dev_info.p_delay;
link->pd_mask |= (1 << pd_tbl->pd);
/*
* Add table to list and also sort list
* from max pd to lowest
*/
__cam_req_mgr_add_tbl_to_link(&link->req.l_tbl, pd_tbl);
}
dev->dev_bit = pd_tbl->dev_count++;
dev->pd_tbl = pd_tbl;
pd_tbl->dev_mask |= (1 << dev->dev_bit);
/* Communicate with dev to establish the link */
dev->ops->link_setup(&link_data);
if (link->max_delay < dev->dev_info.p_delay)
link->max_delay = dev->dev_info.p_delay;
}
link->num_devs = link_info->num_devices;
/* Assign id for pd tables */
__cam_req_mgr_tbl_set_id(link->req.l_tbl, &link->req);
/* At start, expect max pd devices, all are in skip state */
__cam_req_mgr_tbl_set_all_skip_cnt(&link->req.l_tbl);
return 0;
error:
__cam_req_mgr_destroy_link_info(link);
return rc;
}
/* IOCTLs handling section */
int cam_req_mgr_create_session(
struct cam_req_mgr_session_info *ses_info)
{
int rc = 0;
int32_t session_hdl;
struct cam_req_mgr_core_session *cam_session = NULL;
if (!ses_info) {
CAM_DBG(CAM_CRM, "NULL session info pointer");
return -EINVAL;
}
mutex_lock(&g_crm_core_dev->crm_lock);
cam_session = (struct cam_req_mgr_core_session *)
kzalloc(sizeof(*cam_session), GFP_KERNEL);
if (!cam_session) {
rc = -ENOMEM;
goto end;
}
session_hdl = cam_create_session_hdl((void *)cam_session);
if (session_hdl < 0) {
CAM_ERR(CAM_CRM, "unable to create session_hdl = %x",
session_hdl);
rc = session_hdl;
kfree(cam_session);
goto end;
}
ses_info->session_hdl = session_hdl;
mutex_init(&cam_session->lock);
CAM_DBG(CAM_CRM, "LOCK_DBG session lock %pK", &cam_session->lock);
mutex_lock(&cam_session->lock);
cam_session->session_hdl = session_hdl;
cam_session->num_links = 0;
cam_session->sync_mode = CAM_REQ_MGR_SYNC_MODE_NO_SYNC;
list_add(&cam_session->entry, &g_crm_core_dev->session_head);
mutex_unlock(&cam_session->lock);
end:
mutex_unlock(&g_crm_core_dev->crm_lock);
return rc;
}
/**
* __cam_req_mgr_unlink()
*
* @brief : Unlink devices on a link structure from the session
* @link : Pointer to the link structure
*
* @return: 0 for success, negative for failure
*
*/
static int __cam_req_mgr_unlink(struct cam_req_mgr_core_link *link)
{
int rc;
mutex_lock(&link->lock);
spin_lock_bh(&link->link_state_spin_lock);
link->state = CAM_CRM_LINK_STATE_IDLE;
/* Destroy timer of link */
crm_timer_exit(&link->watchdog);
spin_unlock_bh(&link->link_state_spin_lock);
__cam_req_mgr_print_req_tbl(&link->req);
/* Destroy workq payload data */
kfree(link->workq->task.pool[0].payload);
link->workq->task.pool[0].payload = NULL;
/* Destroy workq of link */
cam_req_mgr_workq_destroy(&link->workq);
/* Cleanup request tables and unlink devices */
rc = __cam_req_mgr_destroy_link_info(link);
if (rc)
CAM_ERR(CAM_CORE,
"Unlink for all devices was not successful");
/* Free memory holding data of linked devs */
__cam_req_mgr_destroy_subdev(link->l_dev);
/* Destroy the link handle */
rc = cam_destroy_device_hdl(link->link_hdl);
if (rc < 0) {
CAM_ERR(CAM_CRM, "error destroying link hdl %x rc %d",
link->link_hdl, rc);
}
mutex_unlock(&link->lock);
return rc;
}
int cam_req_mgr_destroy_session(
struct cam_req_mgr_session_info *ses_info)
{
int rc;
int i;
struct cam_req_mgr_core_session *cam_session = NULL;
struct cam_req_mgr_core_link *link;
if (!ses_info) {
CAM_DBG(CAM_CRM, "NULL session info pointer");
return -EINVAL;
}
mutex_lock(&g_crm_core_dev->crm_lock);
cam_session = (struct cam_req_mgr_core_session *)
cam_get_device_priv(ses_info->session_hdl);
if (!cam_session) {
CAM_ERR(CAM_CRM, "failed to get session priv");
rc = -ENOENT;
goto end;
}
mutex_lock(&cam_session->lock);
if (cam_session->num_links) {
CAM_DBG(CAM_CRM, "destroy session %x num_active_links %d",
ses_info->session_hdl,
cam_session->num_links);
for (i = 0; i < MAXIMUM_LINKS_PER_SESSION; i++) {
link = cam_session->links[i];
if (!link)
continue;
/* Ignore return value since session is going away */
__cam_req_mgr_unlink(link);
__cam_req_mgr_free_link(link);
}
}
list_del(&cam_session->entry);
mutex_unlock(&cam_session->lock);
mutex_destroy(&cam_session->lock);
kfree(cam_session);
rc = cam_destroy_session_hdl(ses_info->session_hdl);
if (rc < 0)
CAM_ERR(CAM_CRM, "unable to destroy session_hdl = %x rc %d",
ses_info->session_hdl, rc);
end:
mutex_unlock(&g_crm_core_dev->crm_lock);
return rc;
}
int cam_req_mgr_link(struct cam_req_mgr_link_info *link_info)
{
int rc = 0;
int wq_flag = 0;
char buf[128];
struct cam_create_dev_hdl root_dev;
struct cam_req_mgr_core_session *cam_session;
struct cam_req_mgr_core_link *link;
if (!link_info) {
CAM_DBG(CAM_CRM, "NULL pointer");
return -EINVAL;
}
if (link_info->num_devices > CAM_REQ_MGR_MAX_HANDLES) {
CAM_ERR(CAM_CRM, "Invalid num devices %d",
link_info->num_devices);
return -EINVAL;
}
/* session hdl's priv data is cam session struct */
cam_session = (struct cam_req_mgr_core_session *)
cam_get_device_priv(link_info->session_hdl);
if (!cam_session) {
CAM_DBG(CAM_CRM, "NULL pointer");
return -EINVAL;
}
mutex_lock(&g_crm_core_dev->crm_lock);
/* Allocate link struct and map it with session's request queue */
link = __cam_req_mgr_reserve_link(cam_session);
if (!link) {
CAM_ERR(CAM_CRM, "failed to reserve new link");
mutex_unlock(&g_crm_core_dev->crm_lock);
return -EINVAL;
}
CAM_DBG(CAM_CRM, "link reserved %pK %x", link, link->link_hdl);
memset(&root_dev, 0, sizeof(struct cam_create_dev_hdl));
root_dev.session_hdl = link_info->session_hdl;
root_dev.priv = (void *)link;
mutex_lock(&link->lock);
/* Create unique dev handle for link */
link->link_hdl = cam_create_device_hdl(&root_dev);
if (link->link_hdl < 0) {
CAM_ERR(CAM_CRM,
"Insufficient memory to create new device handle");
rc = link->link_hdl;
goto link_hdl_fail;
}
link_info->link_hdl = link->link_hdl;
/* Allocate memory to hold data of all linked devs */
rc = __cam_req_mgr_create_subdevs(&link->l_dev,
link_info->num_devices);
if (rc < 0) {
CAM_ERR(CAM_CRM,
"Insufficient memory to create new crm subdevs");
goto create_subdev_failed;
}
/* Using device ops query connected devs, prepare request tables */
rc = __cam_req_mgr_setup_link_info(link, link_info);
if (rc < 0)
goto setup_failed;
spin_lock_bh(&link->link_state_spin_lock);
link->state = CAM_CRM_LINK_STATE_READY;
spin_unlock_bh(&link->link_state_spin_lock);
/* Create worker for current link */
snprintf(buf, sizeof(buf), "%x-%x",
link_info->session_hdl, link->link_hdl);
wq_flag = CAM_WORKQ_FLAG_HIGH_PRIORITY | CAM_WORKQ_FLAG_SERIAL;
rc = cam_req_mgr_workq_create(buf, CRM_WORKQ_NUM_TASKS,
&link->workq, CRM_WORKQ_USAGE_NON_IRQ, wq_flag);
if (rc < 0) {
CAM_ERR(CAM_CRM, "FATAL: unable to create worker");
__cam_req_mgr_destroy_link_info(link);
goto setup_failed;
}
/* Assign payload to workqueue tasks */
rc = __cam_req_mgr_setup_payload(link->workq);
if (rc < 0) {
__cam_req_mgr_destroy_link_info(link);
cam_req_mgr_workq_destroy(&link->workq);
goto setup_failed;
}
mutex_unlock(&link->lock);
mutex_unlock(&g_crm_core_dev->crm_lock);
return rc;
setup_failed:
__cam_req_mgr_destroy_subdev(link->l_dev);
create_subdev_failed:
cam_destroy_device_hdl(link->link_hdl);
link_info->link_hdl = 0;
link_hdl_fail:
mutex_unlock(&link->lock);
__cam_req_mgr_unreserve_link(cam_session, link);
mutex_unlock(&g_crm_core_dev->crm_lock);
return rc;
}
int cam_req_mgr_unlink(struct cam_req_mgr_unlink_info *unlink_info)
{
int rc = 0;
struct cam_req_mgr_core_session *cam_session;
struct cam_req_mgr_core_link *link;
if (!unlink_info) {
CAM_ERR(CAM_CRM, "NULL pointer");
return -EINVAL;
}
mutex_lock(&g_crm_core_dev->crm_lock);
CAM_DBG(CAM_CRM, "link_hdl %x", unlink_info->link_hdl);
/* session hdl's priv data is cam session struct */
cam_session = (struct cam_req_mgr_core_session *)
cam_get_device_priv(unlink_info->session_hdl);
if (!cam_session) {
CAM_ERR(CAM_CRM, "NULL pointer");
mutex_unlock(&g_crm_core_dev->crm_lock);
return -EINVAL;
}
/* link hdl's priv data is core_link struct */
link = cam_get_device_priv(unlink_info->link_hdl);
if (!link) {
CAM_ERR(CAM_CRM, "NULL pointer");
rc = -EINVAL;
goto done;
}
rc = __cam_req_mgr_unlink(link);
/* Free curent link and put back into session's free pool of links */
__cam_req_mgr_unreserve_link(cam_session, link);
done:
mutex_unlock(&g_crm_core_dev->crm_lock);
return rc;
}
int cam_req_mgr_schedule_request(
struct cam_req_mgr_sched_request *sched_req)
{
int rc = 0;
struct cam_req_mgr_core_link *link = NULL;
struct cam_req_mgr_core_session *session = NULL;
struct cam_req_mgr_sched_request *sched;
struct crm_task_payload task_data;
if (!sched_req) {
CAM_ERR(CAM_CRM, "csl_req is NULL");
return -EINVAL;
}
mutex_lock(&g_crm_core_dev->crm_lock);
link = (struct cam_req_mgr_core_link *)
cam_get_device_priv(sched_req->link_hdl);
if (!link) {
CAM_DBG(CAM_CRM, "link ptr NULL %x", sched_req->link_hdl);
rc = -EINVAL;
goto end;
}
session = (struct cam_req_mgr_core_session *)link->parent;
if (!session) {
CAM_WARN(CAM_CRM, "session ptr NULL %x", sched_req->link_hdl);
rc = -EINVAL;
goto end;
}
CAM_DBG(CAM_CRM, "link 0x%x req %lld, sync_mode %d",
sched_req->link_hdl, sched_req->req_id, sched_req->sync_mode);
task_data.type = CRM_WORKQ_TASK_SCHED_REQ;
sched = (struct cam_req_mgr_sched_request *)&task_data.u;
sched->req_id = sched_req->req_id;
sched->sync_mode = sched_req->sync_mode;
sched->link_hdl = sched_req->link_hdl;
if (session->force_err_recovery == AUTO_RECOVERY) {
sched->bubble_enable = sched_req->bubble_enable;
} else {
sched->bubble_enable =
(session->force_err_recovery == FORCE_ENABLE_RECOVERY) ? 1 : 0;
}
rc = cam_req_mgr_process_sched_req(link, &task_data);
CAM_DBG(CAM_REQ, "Open req %lld on link 0x%x with sync_mode %d",
sched_req->req_id, sched_req->link_hdl, sched_req->sync_mode);
end:
mutex_unlock(&g_crm_core_dev->crm_lock);
return rc;
}
int cam_req_mgr_sync_config(
struct cam_req_mgr_sync_mode *sync_info)
{
int rc = 0;
struct cam_req_mgr_core_session *cam_session;
struct cam_req_mgr_core_link *link1 = NULL;
struct cam_req_mgr_core_link *link2 = NULL;
if (!sync_info) {
CAM_ERR(CAM_CRM, "NULL pointer");
return -EINVAL;
}
if ((sync_info->num_links < 0) ||
(sync_info->num_links >
MAX_LINKS_PER_SESSION)) {
CAM_ERR(CAM_CRM, "Invalid num links %d", sync_info->num_links);
return -EINVAL;
}
if ((!sync_info->link_hdls[0]) || (!sync_info->link_hdls[1])) {
CAM_WARN(CAM_CRM, "Invalid link handles 0x%x 0x%x",
sync_info->link_hdls[0], sync_info->link_hdls[1]);
return -EINVAL;
}
mutex_lock(&g_crm_core_dev->crm_lock);
/* session hdl's priv data is cam session struct */
cam_session = (struct cam_req_mgr_core_session *)
cam_get_device_priv(sync_info->session_hdl);
if (!cam_session) {
CAM_ERR(CAM_CRM, "NULL pointer");
mutex_unlock(&g_crm_core_dev->crm_lock);
return -EINVAL;
}
mutex_lock(&cam_session->lock);
CAM_DBG(CAM_CRM, "link handles %x %x",
sync_info->link_hdls[0], sync_info->link_hdls[1]);
/* only two links existing per session in dual cam use case*/
link1 = cam_get_device_priv(sync_info->link_hdls[0]);
if (!link1) {
CAM_ERR(CAM_CRM, "link1 NULL pointer");
rc = -EINVAL;
goto done;
}
link2 = cam_get_device_priv(sync_info->link_hdls[1]);
if (!link2) {
CAM_ERR(CAM_CRM, "link2 NULL pointer");
rc = -EINVAL;
goto done;
}
link1->sof_counter = -1;
link1->sync_self_ref = -1;
link1->frame_skip_flag = false;
link1->sync_link_sof_skip = false;
link1->sync_link = link2;
link2->sof_counter = -1;
link2->sync_self_ref = -1;
link2->frame_skip_flag = false;
link2->sync_link_sof_skip = false;
link2->sync_link = link1;
cam_session->sync_mode = sync_info->sync_mode;
CAM_DBG(CAM_REQ,
"Sync config on link1 0x%x & link2 0x%x with sync_mode %d",
link1->link_hdl, link2->link_hdl, cam_session->sync_mode);
done:
mutex_unlock(&cam_session->lock);
mutex_unlock(&g_crm_core_dev->crm_lock);
return rc;
}
int cam_req_mgr_flush_requests(
struct cam_req_mgr_flush_info *flush_info)
{
int rc = 0;
struct crm_workq_task *task = NULL;
struct cam_req_mgr_core_link *link = NULL;
struct cam_req_mgr_flush_info *flush;
struct crm_task_payload *task_data;
struct cam_req_mgr_core_session *session = NULL;
if (!flush_info) {
CAM_ERR(CAM_CRM, "flush req is NULL");
rc = -EFAULT;
goto end;
}
if (flush_info->flush_type >= CAM_REQ_MGR_FLUSH_TYPE_MAX) {
CAM_ERR(CAM_CRM, "incorrect flush type %x",
flush_info->flush_type);
rc = -EINVAL;
goto end;
}
mutex_lock(&g_crm_core_dev->crm_lock);
/* session hdl's priv data is cam session struct */
session = (struct cam_req_mgr_core_session *)
cam_get_device_priv(flush_info->session_hdl);
if (!session) {
CAM_ERR(CAM_CRM, "Invalid session %x", flush_info->session_hdl);
rc = -EINVAL;
goto end;
}
if (session->num_links <= 0) {
CAM_WARN(CAM_CRM, "No active links in session %x",
flush_info->session_hdl);
goto end;
}
link = (struct cam_req_mgr_core_link *)
cam_get_device_priv(flush_info->link_hdl);
if (!link) {
CAM_DBG(CAM_CRM, "link ptr NULL %x", flush_info->link_hdl);
rc = -EINVAL;
goto end;
}
task = cam_req_mgr_workq_get_task(link->workq);
if (!task) {
rc = -ENOMEM;
goto end;
}
task_data = (struct crm_task_payload *)task->payload;
task_data->type = CRM_WORKQ_TASK_FLUSH_REQ;
flush = (struct cam_req_mgr_flush_info *)&task_data->u;
flush->req_id = flush_info->req_id;
flush->link_hdl = flush_info->link_hdl;
flush->flush_type = flush_info->flush_type;
task->process_cb = &cam_req_mgr_process_flush_req;
init_completion(&link->workq_comp);
rc = cam_req_mgr_workq_enqueue_task(task, link, CRM_TASK_PRIORITY_0);
/* Blocking call */
rc = wait_for_completion_timeout(
&link->workq_comp,
msecs_to_jiffies(CAM_REQ_MGR_SCHED_REQ_TIMEOUT));
end:
mutex_unlock(&g_crm_core_dev->crm_lock);
return rc;
}
int cam_req_mgr_link_control(struct cam_req_mgr_link_control *control)
{
int rc = 0;
int i, j;
struct cam_req_mgr_core_link *link = NULL;
struct cam_req_mgr_connected_device *dev = NULL;
struct cam_req_mgr_link_evt_data evt_data;
if (!control) {
CAM_ERR(CAM_CRM, "Control command is NULL");
rc = -EINVAL;
goto end;
}
if (control->num_links > MAX_LINKS_PER_SESSION) {
CAM_ERR(CAM_CRM, "Invalid number of links %d",
control->num_links);
rc = -EINVAL;
goto end;
}
mutex_lock(&g_crm_core_dev->crm_lock);
for (i = 0; i < control->num_links; i++) {
link = (struct cam_req_mgr_core_link *)
cam_get_device_priv(control->link_hdls[i]);
if (!link) {
CAM_ERR(CAM_CRM, "Link(%d) is NULL on session 0x%x",
i, control->session_hdl);
rc = -EINVAL;
break;
}
mutex_lock(&link->lock);
if (control->ops == CAM_REQ_MGR_LINK_ACTIVATE) {
/* Start SOF watchdog timer */
rc = crm_timer_init(&link->watchdog,
CAM_REQ_MGR_WATCHDOG_TIMEOUT, link,
&__cam_req_mgr_sof_freeze);
if (rc < 0) {
CAM_ERR(CAM_CRM,
"SOF timer start fails: link=0x%x",
link->link_hdl);
rc = -EFAULT;
}
/* notify nodes */
for (j = 0; j < link->num_devs; j++) {
dev = &link->l_dev[j];
evt_data.evt_type = CAM_REQ_MGR_LINK_EVT_RESUME;
evt_data.link_hdl = link->link_hdl;
evt_data.dev_hdl = dev->dev_hdl;
evt_data.req_id = 0;
if (dev->ops && dev->ops->process_evt)
dev->ops->process_evt(&evt_data);
}
} else if (control->ops == CAM_REQ_MGR_LINK_DEACTIVATE) {
/* Destroy SOF watchdog timer */
spin_lock_bh(&link->link_state_spin_lock);
crm_timer_exit(&link->watchdog);
spin_unlock_bh(&link->link_state_spin_lock);
/* notify nodes */
for (j = 0; j < link->num_devs; j++) {
dev = &link->l_dev[j];
evt_data.evt_type = CAM_REQ_MGR_LINK_EVT_PAUSE;
evt_data.link_hdl = link->link_hdl;
evt_data.dev_hdl = dev->dev_hdl;
evt_data.req_id = 0;
if (dev->ops && dev->ops->process_evt)
dev->ops->process_evt(&evt_data);
}
} else {
CAM_ERR(CAM_CRM, "Invalid link control command");
rc = -EINVAL;
}
mutex_unlock(&link->lock);
}
mutex_unlock(&g_crm_core_dev->crm_lock);
end:
return rc;
}
int cam_req_mgr_core_device_init(void)
{
CAM_DBG(CAM_CRM, "Enter g_crm_core_dev %pK", g_crm_core_dev);
if (g_crm_core_dev) {
CAM_WARN(CAM_CRM, "core device is already initialized");
return 0;
}
g_crm_core_dev = (struct cam_req_mgr_core_device *)
kzalloc(sizeof(*g_crm_core_dev), GFP_KERNEL);
if (!g_crm_core_dev)
return -ENOMEM;
CAM_DBG(CAM_CRM, "g_crm_core_dev %pK", g_crm_core_dev);
INIT_LIST_HEAD(&g_crm_core_dev->session_head);
mutex_init(&g_crm_core_dev->crm_lock);
cam_req_mgr_debug_register(g_crm_core_dev);
return 0;
}
int cam_req_mgr_core_device_deinit(void)
{
if (!g_crm_core_dev) {
CAM_ERR(CAM_CRM, "NULL pointer");
return -EINVAL;
}
CAM_DBG(CAM_CRM, "g_crm_core_dev %pK", g_crm_core_dev);
mutex_destroy(&g_crm_core_dev->crm_lock);
kfree(g_crm_core_dev);
g_crm_core_dev = NULL;
return 0;
}