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kernel_samsung_sm7125/drivers/isdn/hardware/eicon/um_idi.c

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// SPDX-License-Identifier: GPL-2.0
/* $Id: um_idi.c,v 1.14 2004/03/21 17:54:37 armin Exp $ */
#include "platform.h"
#include "di_defs.h"
#include "pc.h"
#include "dqueue.h"
#include "adapter.h"
#include "entity.h"
#include "um_xdi.h"
#include "um_idi.h"
#include "debuglib.h"
#include "divasync.h"
#define DIVAS_MAX_XDI_ADAPTERS 64
/* --------------------------------------------------------------------------
IMPORTS
-------------------------------------------------------------------------- */
extern void diva_os_wakeup_read(void *os_context);
extern void diva_os_wakeup_close(void *os_context);
/* --------------------------------------------------------------------------
LOCALS
-------------------------------------------------------------------------- */
static LIST_HEAD(adapter_q);
static diva_os_spin_lock_t adapter_lock;
static diva_um_idi_adapter_t *diva_um_idi_find_adapter(dword nr);
static void cleanup_adapter(diva_um_idi_adapter_t *a);
static void cleanup_entity(divas_um_idi_entity_t *e);
static int diva_user_mode_idi_adapter_features(diva_um_idi_adapter_t *a,
diva_um_idi_adapter_features_t
*features);
static int process_idi_request(divas_um_idi_entity_t *e,
const diva_um_idi_req_hdr_t *req);
static int process_idi_rc(divas_um_idi_entity_t *e, byte rc);
static int process_idi_ind(divas_um_idi_entity_t *e, byte ind);
static int write_return_code(divas_um_idi_entity_t *e, byte rc);
/* --------------------------------------------------------------------------
MAIN
-------------------------------------------------------------------------- */
int diva_user_mode_idi_init(void)
{
diva_os_initialize_spin_lock(&adapter_lock, "adapter");
return (0);
}
/* --------------------------------------------------------------------------
Copy adapter features to user supplied buffer
-------------------------------------------------------------------------- */
static int
diva_user_mode_idi_adapter_features(diva_um_idi_adapter_t *a,
diva_um_idi_adapter_features_t *
features)
{
IDI_SYNC_REQ sync_req;
if ((a) && (a->d.request)) {
features->type = a->d.type;
features->features = a->d.features;
features->channels = a->d.channels;
memset(features->name, 0, sizeof(features->name));
sync_req.GetName.Req = 0;
sync_req.GetName.Rc = IDI_SYNC_REQ_GET_NAME;
(*(a->d.request)) ((ENTITY *)&sync_req);
strlcpy(features->name, sync_req.GetName.name,
sizeof(features->name));
sync_req.GetSerial.Req = 0;
sync_req.GetSerial.Rc = IDI_SYNC_REQ_GET_SERIAL;
sync_req.GetSerial.serial = 0;
(*(a->d.request))((ENTITY *)&sync_req);
features->serial_number = sync_req.GetSerial.serial;
}
return ((a) ? 0 : -1);
}
/* --------------------------------------------------------------------------
REMOVE ADAPTER
-------------------------------------------------------------------------- */
void diva_user_mode_idi_remove_adapter(int adapter_nr)
{
struct list_head *tmp;
diva_um_idi_adapter_t *a;
list_for_each(tmp, &adapter_q) {
a = list_entry(tmp, diva_um_idi_adapter_t, link);
if (a->adapter_nr == adapter_nr) {
list_del(tmp);
cleanup_adapter(a);
DBG_LOG(("DIDD: del adapter(%d)", a->adapter_nr));
diva_os_free(0, a);
break;
}
}
}
/* --------------------------------------------------------------------------
CALLED ON DRIVER EXIT (UNLOAD)
-------------------------------------------------------------------------- */
void diva_user_mode_idi_finit(void)
{
struct list_head *tmp, *safe;
diva_um_idi_adapter_t *a;
list_for_each_safe(tmp, safe, &adapter_q) {
a = list_entry(tmp, diva_um_idi_adapter_t, link);
list_del(tmp);
cleanup_adapter(a);
DBG_LOG(("DIDD: del adapter(%d)", a->adapter_nr));
diva_os_free(0, a);
}
diva_os_destroy_spin_lock(&adapter_lock, "adapter");
}
/* -------------------------------------------------------------------------
CREATE AND INIT IDI ADAPTER
------------------------------------------------------------------------- */
int diva_user_mode_idi_create_adapter(const DESCRIPTOR *d, int adapter_nr)
{
diva_os_spin_lock_magic_t old_irql;
diva_um_idi_adapter_t *a =
(diva_um_idi_adapter_t *) diva_os_malloc(0,
sizeof
(diva_um_idi_adapter_t));
if (!a) {
return (-1);
}
memset(a, 0x00, sizeof(*a));
INIT_LIST_HEAD(&a->entity_q);
a->d = *d;
a->adapter_nr = adapter_nr;
DBG_LOG(("DIDD_ADD A(%d), type:%02x, features:%04x, channels:%d",
adapter_nr, a->d.type, a->d.features, a->d.channels));
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "create_adapter");
list_add_tail(&a->link, &adapter_q);
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "create_adapter");
return (0);
}
/* ------------------------------------------------------------------------
Find adapter by Adapter number
------------------------------------------------------------------------ */
static diva_um_idi_adapter_t *diva_um_idi_find_adapter(dword nr)
{
diva_um_idi_adapter_t *a = NULL;
struct list_head *tmp;
list_for_each(tmp, &adapter_q) {
a = list_entry(tmp, diva_um_idi_adapter_t, link);
DBG_TRC(("find_adapter: (%d)-(%d)", nr, a->adapter_nr));
if (a->adapter_nr == (int)nr)
break;
a = NULL;
}
return (a);
}
/* ------------------------------------------------------------------------
Cleanup this adapter and cleanup/delete all entities assigned
to this adapter
------------------------------------------------------------------------ */
static void cleanup_adapter(diva_um_idi_adapter_t *a)
{
struct list_head *tmp, *safe;
divas_um_idi_entity_t *e;
list_for_each_safe(tmp, safe, &a->entity_q) {
e = list_entry(tmp, divas_um_idi_entity_t, link);
list_del(tmp);
cleanup_entity(e);
if (e->os_context) {
diva_os_wakeup_read(e->os_context);
diva_os_wakeup_close(e->os_context);
}
}
memset(&a->d, 0x00, sizeof(DESCRIPTOR));
}
/* ------------------------------------------------------------------------
Cleanup, but NOT delete this entity
------------------------------------------------------------------------ */
static void cleanup_entity(divas_um_idi_entity_t *e)
{
e->os_ref = NULL;
e->status = 0;
e->adapter = NULL;
e->e.Id = 0;
e->rc_count = 0;
e->status |= DIVA_UM_IDI_REMOVED;
e->status |= DIVA_UM_IDI_REMOVE_PENDING;
diva_data_q_finit(&e->data);
diva_data_q_finit(&e->rc);
}
/* ------------------------------------------------------------------------
Create ENTITY, link it to the adapter and remove pointer to entity
------------------------------------------------------------------------ */
void *divas_um_idi_create_entity(dword adapter_nr, void *file)
{
divas_um_idi_entity_t *e;
diva_um_idi_adapter_t *a;
diva_os_spin_lock_magic_t old_irql;
if ((e = (divas_um_idi_entity_t *) diva_os_malloc(0, sizeof(*e)))) {
memset(e, 0x00, sizeof(*e));
if (!
(e->os_context =
diva_os_malloc(0, diva_os_get_context_size()))) {
DBG_LOG(("E(%08x) no memory for os context", e));
diva_os_free(0, e);
return NULL;
}
memset(e->os_context, 0x00, diva_os_get_context_size());
if ((diva_data_q_init(&e->data, 2048 + 512, 16))) {
diva_os_free(0, e->os_context);
diva_os_free(0, e);
return NULL;
}
if ((diva_data_q_init(&e->rc, sizeof(diva_um_idi_ind_hdr_t), 2))) {
diva_data_q_finit(&e->data);
diva_os_free(0, e->os_context);
diva_os_free(0, e);
return NULL;
}
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "create_entity");
/*
Look for Adapter requested
*/
if (!(a = diva_um_idi_find_adapter(adapter_nr))) {
/*
No adapter was found, or this adapter was removed
*/
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "create_entity");
DBG_LOG(("A: no adapter(%ld)", adapter_nr));
cleanup_entity(e);
diva_os_free(0, e->os_context);
diva_os_free(0, e);
return NULL;
}
e->os_ref = file; /* link to os handle */
e->adapter = a; /* link to adapter */
list_add_tail(&e->link, &a->entity_q); /* link from adapter */
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "create_entity");
DBG_LOG(("A(%ld), create E(%08x)", adapter_nr, e));
}
return (e);
}
/* ------------------------------------------------------------------------
Unlink entity and free memory
------------------------------------------------------------------------ */
int divas_um_idi_delete_entity(int adapter_nr, void *entity)
{
divas_um_idi_entity_t *e;
diva_um_idi_adapter_t *a;
diva_os_spin_lock_magic_t old_irql;
if (!(e = (divas_um_idi_entity_t *) entity))
return (-1);
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "delete_entity");
if ((a = e->adapter)) {
list_del(&e->link);
}
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "delete_entity");
diva_um_idi_stop_wdog(entity);
cleanup_entity(e);
diva_os_free(0, e->os_context);
memset(e, 0x00, sizeof(*e));
DBG_LOG(("A(%d) remove E:%08x", adapter_nr, e));
diva_os_free(0, e);
return (0);
}
/* --------------------------------------------------------------------------
Called by application to read data from IDI
-------------------------------------------------------------------------- */
int diva_um_idi_read(void *entity,
void *os_handle,
void *dst,
int max_length, divas_um_idi_copy_to_user_fn_t cp_fn)
{
divas_um_idi_entity_t *e;
diva_um_idi_adapter_t *a;
const void *data;
int length, ret = 0;
diva_um_idi_data_queue_t *q;
diva_os_spin_lock_magic_t old_irql;
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "read");
e = (divas_um_idi_entity_t *) entity;
if (!e || (!(a = e->adapter)) ||
(e->status & DIVA_UM_IDI_REMOVE_PENDING) ||
(e->status & DIVA_UM_IDI_REMOVED) ||
(a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "read");
DBG_ERR(("E(%08x) read failed - adapter removed", e))
return (-1);
}
DBG_TRC(("A(%d) E(%08x) read(%d)", a->adapter_nr, e, max_length));
/*
Try to read return code first
*/
data = diva_data_q_get_segment4read(&e->rc);
q = &e->rc;
/*
No return codes available, read indications now
*/
if (!data) {
if (!(e->status & DIVA_UM_IDI_RC_PENDING)) {
DBG_TRC(("A(%d) E(%08x) read data", a->adapter_nr, e));
data = diva_data_q_get_segment4read(&e->data);
q = &e->data;
}
} else {
e->status &= ~DIVA_UM_IDI_RC_PENDING;
DBG_TRC(("A(%d) E(%08x) read rc", a->adapter_nr, e));
}
if (data) {
if ((length = diva_data_q_get_segment_length(q)) >
max_length) {
/*
Not enough space to read message
*/
DBG_ERR(("A: A(%d) E(%08x) read small buffer",
a->adapter_nr, e, ret));
diva_os_leave_spin_lock(&adapter_lock, &old_irql,
"read");
return (-2);
}
/*
Copy it to user, this function does access ONLY locked an verified
memory, also we can access it witch spin lock held
*/
if ((ret = (*cp_fn) (os_handle, dst, data, length)) >= 0) {
/*
Acknowledge only if read was successful
*/
diva_data_q_ack_segment4read(q);
}
}
DBG_TRC(("A(%d) E(%08x) read=%d", a->adapter_nr, e, ret));
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "read");
return (ret);
}
int diva_um_idi_write(void *entity,
void *os_handle,
const void *src,
int length, divas_um_idi_copy_from_user_fn_t cp_fn)
{
divas_um_idi_entity_t *e;
diva_um_idi_adapter_t *a;
diva_um_idi_req_hdr_t *req;
void *data;
int ret = 0;
diva_os_spin_lock_magic_t old_irql;
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "write");
e = (divas_um_idi_entity_t *) entity;
if (!e || (!(a = e->adapter)) ||
(e->status & DIVA_UM_IDI_REMOVE_PENDING) ||
(e->status & DIVA_UM_IDI_REMOVED) ||
(a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
DBG_ERR(("E(%08x) write failed - adapter removed", e))
return (-1);
}
DBG_TRC(("A(%d) E(%08x) write(%d)", a->adapter_nr, e, length));
if ((length < sizeof(*req)) || (length > sizeof(e->buffer))) {
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
return (-2);
}
if (e->status & DIVA_UM_IDI_RC_PENDING) {
DBG_ERR(("A: A(%d) E(%08x) rc pending", a->adapter_nr, e));
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
return (-1); /* should wait for RC code first */
}
/*
Copy function does access only locked verified memory,
also it can be called with spin lock held
*/
if ((ret = (*cp_fn) (os_handle, e->buffer, src, length)) < 0) {
DBG_TRC(("A: A(%d) E(%08x) write error=%d", a->adapter_nr,
e, ret));
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
return (ret);
}
req = (diva_um_idi_req_hdr_t *)&e->buffer[0];
switch (req->type) {
case DIVA_UM_IDI_GET_FEATURES:{
DBG_LOG(("A(%d) get_features", a->adapter_nr));
if (!(data =
diva_data_q_get_segment4write(&e->data))) {
DBG_ERR(("A(%d) get_features, no free buffer",
a->adapter_nr));
diva_os_leave_spin_lock(&adapter_lock,
&old_irql,
"write");
return (0);
}
diva_user_mode_idi_adapter_features(a, &(((diva_um_idi_ind_hdr_t
*) data)->hdr.features));
((diva_um_idi_ind_hdr_t *) data)->type =
DIVA_UM_IDI_IND_FEATURES;
((diva_um_idi_ind_hdr_t *) data)->data_length = 0;
diva_data_q_ack_segment4write(&e->data,
sizeof(diva_um_idi_ind_hdr_t));
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
diva_os_wakeup_read(e->os_context);
}
break;
case DIVA_UM_IDI_REQ:
case DIVA_UM_IDI_REQ_MAN:
case DIVA_UM_IDI_REQ_SIG:
case DIVA_UM_IDI_REQ_NET:
DBG_TRC(("A(%d) REQ(%02d)-(%02d)-(%08x)", a->adapter_nr,
req->Req, req->ReqCh,
req->type & DIVA_UM_IDI_REQ_TYPE_MASK));
switch (process_idi_request(e, req)) {
case -1:
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
return (-1);
case -2:
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
diva_os_wakeup_read(e->os_context);
break;
default:
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
break;
}
break;
default:
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
return (-1);
}
DBG_TRC(("A(%d) E(%08x) write=%d", a->adapter_nr, e, ret));
return (ret);
}
/* --------------------------------------------------------------------------
CALLBACK FROM XDI
-------------------------------------------------------------------------- */
static void diva_um_idi_xdi_callback(ENTITY *entity)
{
divas_um_idi_entity_t *e = DIVAS_CONTAINING_RECORD(entity,
divas_um_idi_entity_t,
e);
diva_os_spin_lock_magic_t old_irql;
int call_wakeup = 0;
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "xdi_callback");
if (e->e.complete == 255) {
if (!(e->status & DIVA_UM_IDI_REMOVE_PENDING)) {
diva_um_idi_stop_wdog(e);
}
if ((call_wakeup = process_idi_rc(e, e->e.Rc))) {
if (e->rc_count) {
e->rc_count--;
}
}
e->e.Rc = 0;
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "xdi_callback");
if (call_wakeup) {
diva_os_wakeup_read(e->os_context);
diva_os_wakeup_close(e->os_context);
}
} else {
if (e->status & DIVA_UM_IDI_REMOVE_PENDING) {
e->e.RNum = 0;
e->e.RNR = 2;
} else {
call_wakeup = process_idi_ind(e, e->e.Ind);
}
e->e.Ind = 0;
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "xdi_callback");
if (call_wakeup) {
diva_os_wakeup_read(e->os_context);
}
}
}
static int process_idi_request(divas_um_idi_entity_t *e,
const diva_um_idi_req_hdr_t *req)
{
int assign = 0;
byte Req = (byte) req->Req;
dword type = req->type & DIVA_UM_IDI_REQ_TYPE_MASK;
if (!e->e.Id || !e->e.callback) { /* not assigned */
if (Req != ASSIGN) {
DBG_ERR(("A: A(%d) E(%08x) not assigned",
e->adapter->adapter_nr, e));
return (-1); /* NOT ASSIGNED */
} else {
switch (type) {
case DIVA_UM_IDI_REQ_TYPE_MAN:
e->e.Id = MAN_ID;
DBG_TRC(("A(%d) E(%08x) assign MAN",
e->adapter->adapter_nr, e));
break;
case DIVA_UM_IDI_REQ_TYPE_SIG:
e->e.Id = DSIG_ID;
DBG_TRC(("A(%d) E(%08x) assign SIG",
e->adapter->adapter_nr, e));
break;
case DIVA_UM_IDI_REQ_TYPE_NET:
e->e.Id = NL_ID;
DBG_TRC(("A(%d) E(%08x) assign NET",
e->adapter->adapter_nr, e));
break;
default:
DBG_ERR(("A: A(%d) E(%08x) unknown type=%08x",
e->adapter->adapter_nr, e,
type));
return (-1);
}
}
e->e.XNum = 1;
e->e.RNum = 1;
e->e.callback = diva_um_idi_xdi_callback;
e->e.X = &e->XData;
e->e.R = &e->RData;
assign = 1;
}
e->status |= DIVA_UM_IDI_RC_PENDING;
e->e.Req = Req;
e->e.ReqCh = (byte) req->ReqCh;
e->e.X->PLength = (word) req->data_length;
e->e.X->P = (byte *)&req[1]; /* Our buffer is safe */
DBG_TRC(("A(%d) E(%08x) request(%02x-%02x-%02x (%d))",
e->adapter->adapter_nr, e, e->e.Id, e->e.Req,
e->e.ReqCh, e->e.X->PLength));
e->rc_count++;
if (e->adapter && e->adapter->d.request) {
diva_um_idi_start_wdog(e);
(*(e->adapter->d.request)) (&e->e);
}
if (assign) {
if (e->e.Rc == OUT_OF_RESOURCES) {
/*
XDI has no entities more, call was not forwarded to the card,
no callback will be scheduled
*/
DBG_ERR(("A: A(%d) E(%08x) XDI out of entities",
e->adapter->adapter_nr, e));
e->e.Id = 0;
e->e.ReqCh = 0;
e->e.RcCh = 0;
e->e.Ind = 0;
e->e.IndCh = 0;
e->e.XNum = 0;
e->e.RNum = 0;
e->e.callback = NULL;
e->e.X = NULL;
e->e.R = NULL;
write_return_code(e, ASSIGN_RC | OUT_OF_RESOURCES);
return (-2);
} else {
e->status |= DIVA_UM_IDI_ASSIGN_PENDING;
}
}
return (0);
}
static int process_idi_rc(divas_um_idi_entity_t *e, byte rc)
{
DBG_TRC(("A(%d) E(%08x) rc(%02x-%02x-%02x)",
e->adapter->adapter_nr, e, e->e.Id, rc, e->e.RcCh));
if (e->status & DIVA_UM_IDI_ASSIGN_PENDING) {
e->status &= ~DIVA_UM_IDI_ASSIGN_PENDING;
if (rc != ASSIGN_OK) {
DBG_ERR(("A: A(%d) E(%08x) ASSIGN failed",
e->adapter->adapter_nr, e));
e->e.callback = NULL;
e->e.Id = 0;
e->e.Req = 0;
e->e.ReqCh = 0;
e->e.Rc = 0;
e->e.RcCh = 0;
e->e.Ind = 0;
e->e.IndCh = 0;
e->e.X = NULL;
e->e.R = NULL;
e->e.XNum = 0;
e->e.RNum = 0;
}
}
if ((e->e.Req == REMOVE) && e->e.Id && (rc == 0xff)) {
DBG_ERR(("A: A(%d) E(%08x) discard OK in REMOVE",
e->adapter->adapter_nr, e));
return (0); /* let us do it in the driver */
}
if ((e->e.Req == REMOVE) && (!e->e.Id)) { /* REMOVE COMPLETE */
e->e.callback = NULL;
e->e.Id = 0;
e->e.Req = 0;
e->e.ReqCh = 0;
e->e.Rc = 0;
e->e.RcCh = 0;
e->e.Ind = 0;
e->e.IndCh = 0;
e->e.X = NULL;
e->e.R = NULL;
e->e.XNum = 0;
e->e.RNum = 0;
e->rc_count = 0;
}
if ((e->e.Req == REMOVE) && (rc != 0xff)) { /* REMOVE FAILED */
DBG_ERR(("A: A(%d) E(%08x) REMOVE FAILED",
e->adapter->adapter_nr, e));
}
write_return_code(e, rc);
return (1);
}
static int process_idi_ind(divas_um_idi_entity_t *e, byte ind)
{
int do_wakeup = 0;
if (e->e.complete != 0x02) {
diva_um_idi_ind_hdr_t *pind =
(diva_um_idi_ind_hdr_t *)
diva_data_q_get_segment4write(&e->data);
if (pind) {
e->e.RNum = 1;
e->e.R->P = (byte *)&pind[1];
e->e.R->PLength =
(word) (diva_data_q_get_max_length(&e->data) -
sizeof(*pind));
DBG_TRC(("A(%d) E(%08x) ind_1(%02x-%02x-%02x)-[%d-%d]",
e->adapter->adapter_nr, e, e->e.Id, ind,
e->e.IndCh, e->e.RLength,
e->e.R->PLength));
} else {
DBG_TRC(("A(%d) E(%08x) ind(%02x-%02x-%02x)-RNR",
e->adapter->adapter_nr, e, e->e.Id, ind,
e->e.IndCh));
e->e.RNum = 0;
e->e.RNR = 1;
do_wakeup = 1;
}
} else {
diva_um_idi_ind_hdr_t *pind =
(diva_um_idi_ind_hdr_t *) (e->e.R->P);
DBG_TRC(("A(%d) E(%08x) ind(%02x-%02x-%02x)-[%d]",
e->adapter->adapter_nr, e, e->e.Id, ind,
e->e.IndCh, e->e.R->PLength));
pind--;
pind->type = DIVA_UM_IDI_IND;
pind->hdr.ind.Ind = ind;
pind->hdr.ind.IndCh = e->e.IndCh;
pind->data_length = e->e.R->PLength;
diva_data_q_ack_segment4write(&e->data,
(int) (sizeof(*pind) +
e->e.R->PLength));
do_wakeup = 1;
}
if ((e->status & DIVA_UM_IDI_RC_PENDING) && !e->rc.count) {
do_wakeup = 0;
}
return (do_wakeup);
}
/* --------------------------------------------------------------------------
Write return code to the return code queue of entity
-------------------------------------------------------------------------- */
static int write_return_code(divas_um_idi_entity_t *e, byte rc)
{
diva_um_idi_ind_hdr_t *prc;
if (!(prc =
(diva_um_idi_ind_hdr_t *) diva_data_q_get_segment4write(&e->rc)))
{
DBG_ERR(("A: A(%d) E(%08x) rc(%02x) lost",
e->adapter->adapter_nr, e, rc));
e->status &= ~DIVA_UM_IDI_RC_PENDING;
return (-1);
}
prc->type = DIVA_UM_IDI_IND_RC;
prc->hdr.rc.Rc = rc;
prc->hdr.rc.RcCh = e->e.RcCh;
prc->data_length = 0;
diva_data_q_ack_segment4write(&e->rc, sizeof(*prc));
return (0);
}
/* --------------------------------------------------------------------------
Return amount of entries that can be bead from this entity or
-1 if adapter was removed
-------------------------------------------------------------------------- */
int diva_user_mode_idi_ind_ready(void *entity, void *os_handle)
{
divas_um_idi_entity_t *e;
diva_um_idi_adapter_t *a;
diva_os_spin_lock_magic_t old_irql;
int ret;
if (!entity)
return (-1);
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "ind_ready");
e = (divas_um_idi_entity_t *) entity;
a = e->adapter;
if ((!a) || (a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
/*
Adapter was unloaded
*/
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "ind_ready");
return (-1); /* adapter was removed */
}
if (e->status & DIVA_UM_IDI_REMOVED) {
/*
entity was removed as result of adapter removal
user should assign this entity again
*/
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "ind_ready");
return (-1);
}
ret = e->rc.count + e->data.count;
if ((e->status & DIVA_UM_IDI_RC_PENDING) && !e->rc.count) {
ret = 0;
}
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "ind_ready");
return (ret);
}
void *diva_um_id_get_os_context(void *entity)
{
return (((divas_um_idi_entity_t *) entity)->os_context);
}
int divas_um_idi_entity_assigned(void *entity)
{
divas_um_idi_entity_t *e;
diva_um_idi_adapter_t *a;
int ret;
diva_os_spin_lock_magic_t old_irql;
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "assigned?");
e = (divas_um_idi_entity_t *) entity;
if (!e || (!(a = e->adapter)) ||
(e->status & DIVA_UM_IDI_REMOVED) ||
(a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "assigned?");
return (0);
}
e->status |= DIVA_UM_IDI_REMOVE_PENDING;
ret = (e->e.Id || e->rc_count
|| (e->status & DIVA_UM_IDI_ASSIGN_PENDING));
DBG_TRC(("Id:%02x, rc_count:%d, status:%08x", e->e.Id, e->rc_count,
e->status))
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "assigned?");
return (ret);
}
int divas_um_idi_entity_start_remove(void *entity)
{
divas_um_idi_entity_t *e;
diva_um_idi_adapter_t *a;
diva_os_spin_lock_magic_t old_irql;
diva_os_enter_spin_lock(&adapter_lock, &old_irql, "start_remove");
e = (divas_um_idi_entity_t *) entity;
if (!e || (!(a = e->adapter)) ||
(e->status & DIVA_UM_IDI_REMOVED) ||
(a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "start_remove");
return (0);
}
if (e->rc_count) {
/*
Entity BUSY
*/
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "start_remove");
return (1);
}
if (!e->e.Id) {
/*
Remove request was already pending, and arrived now
*/
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "start_remove");
return (0); /* REMOVE was pending */
}
/*
Now send remove request
*/
e->e.Req = REMOVE;
e->e.ReqCh = 0;
e->rc_count++;
DBG_TRC(("A(%d) E(%08x) request(%02x-%02x-%02x (%d))",
e->adapter->adapter_nr, e, e->e.Id, e->e.Req,
e->e.ReqCh, e->e.X->PLength));
if (a->d.request)
(*(a->d.request)) (&e->e);
diva_os_leave_spin_lock(&adapter_lock, &old_irql, "start_remove");
return (0);
}