Commit Graph

2965 Commits

Author SHA1 Message Date
Vinayak Kariappa Chettimada
6551630c2c Bluetooth: Controller: Fix window offset calculation
Fix window offset calculation which is missing the radio
rx ready delay timing be subtracted because the connection
offset from the start of the radio for scan window to the
end of the ADV_IND PDU includes the radio rx ready delay
timing, where as the determined window offset by advanced
scheduling calculates the offset from the ticks_at_expire
of the scan window to an active central connection's
ticks_at_expire.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-04-13 16:12:58 +02:00
Vinayak Kariappa Chettimada
9d5ecd5bc9 Bluetooth: Controller: Use remainder in win_offset_us calculation
Update Advanced Scheduling implementation to use remainder
value in precisely calculating the connection request window
offset in microseconds.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-04-13 16:12:58 +02:00
Vinayak Kariappa Chettimada
205406820f Bluetooth: Controller: Move rx chain delay use into prepare_connect_req
Move the use of rx chain delay value used to calculate the
window offset into lll_scan_prepare_connect_req() instead of
current two places, one for legacy and other for extended
connection setup.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-04-13 16:12:58 +02:00
Vinayak Kariappa Chettimada
d1d58de94c Bluetooth: Controller: Match Central roles for BT_CTLR_CENTRAL_SPACING
Find and match only Central role ticker when applying the
BT_CTLR_CENTRAL_SPACING value.

Use the EVENT_TICKER_RES_MARGIN_US value as +/- jitter
margin when ticker advanced scheduling is used to group
radio events.

When using CONFIG_BT_CTLR_CENTRAL_SPACING, do not add the
+/- jitter to the ticks_slot.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-04-13 16:12:58 +02:00
Nirosharn Amarasinghe
11ce28f8f7 Bluetooth: controller: Consideration for SDU interval in fragmentation
Included consideration for the packet sequence number and time stamps
together with the SDU interval in matching the event for fragmentation
of SDUs to unframed PDUs.

Implemented:
-- Increase in kconfig limit of BT_CTLR_ISO_TX_BUFFERS to allow full 32
   buffers to be available for LL/CIS/PER/BV-39C
-- ISO-AL microsecond time wrapping exposed to be used externally to
   adjust incoming Group Reference Points and Time-stamps where required
-- Function that handles adjustment of payload number according to
   incoming SDU exposed for external use to allow next payload number to
   be accessed by ISO transmit tests
-- Changed internal fragmentation source identification parameter from
   the source structure pointer to the source handle so that only the
   source handle needs to be used for external calls

Signed-off-by: Nirosharn Amarasinghe <niag@demant.com>
2023-04-13 16:09:39 +02:00
Gerard Marull-Paretas
4863c5f05b sys/util: extend usage of DIV_ROUND_UP
Many areas of Zephyr divide and round up without using the DIV_ROUND_UP
macro. Make use of it, so that we make use of a tested system macro and
at the same time we make code more readable.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
2023-04-12 16:42:29 +02:00
Gerard Marull-Paretas
a5fd0d184a init: remove the need for a dummy device pointer in SYS_INIT functions
The init infrastructure, found in `init.h`, is currently used by:

- `SYS_INIT`: to call functions before `main`
- `DEVICE_*`: to initialize devices

They are all sorted according to an initialization level + a priority.
`SYS_INIT` calls are really orthogonal to devices, however, the required
function signature requires a `const struct device *dev` as a first
argument. The only reason for that is because the same init machinery is
used by devices, so we have something like:

```c
struct init_entry {
	int (*init)(const struct device *dev);
	/* only set by DEVICE_*, otherwise NULL */
	const struct device *dev;
}
```

As a result, we end up with such weird/ugly pattern:

```c
static int my_init(const struct device *dev)
{
	/* always NULL! add ARG_UNUSED to avoid compiler warning */
	ARG_UNUSED(dev);
	...
}
```

This is really a result of poor internals isolation. This patch proposes
a to make init entries more flexible so that they can accept sytem
initialization calls like this:

```c
static int my_init(void)
{
	...
}
```

This is achieved using a union:

```c
union init_function {
	/* for SYS_INIT, used when init_entry.dev == NULL */
	int (*sys)(void);
	/* for DEVICE*, used when init_entry.dev != NULL */
	int (*dev)(const struct device *dev);
};

struct init_entry {
	/* stores init function (either for SYS_INIT or DEVICE*)
	union init_function init_fn;
	/* stores device pointer for DEVICE*, NULL for SYS_INIT. Allows
	 * to know which union entry to call.
	 */
	const struct device *dev;
}
```

This solution **does not increase ROM usage**, and allows to offer clean
public APIs for both SYS_INIT and DEVICE*. Note that however, init
machinery keeps a coupling with devices.

**NOTE**: This is a breaking change! All `SYS_INIT` functions will need
to be converted to the new signature. See the script offered in the
following commit.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>

init: convert SYS_INIT functions to the new signature

Conversion scripted using scripts/utils/migrate_sys_init.py.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>

manifest: update projects for SYS_INIT changes

Update modules with updated SYS_INIT calls:

- hal_ti
- lvgl
- sof
- TraceRecorderSource

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>

tests: devicetree: devices: adjust test

Adjust test according to the recently introduced SYS_INIT
infrastructure.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>

tests: kernel: threads: adjust SYS_INIT call

Adjust to the new signature: int (*init_fn)(void);

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
2023-04-12 14:28:07 +00:00
Vinayak Kariappa Chettimada
51a7de2beb Bluetooth: Controller: Fix BIG handle when operation cancelled by Host
Fix the BIG handle in the HCI LE BIG Sync Established event
when BIG Create Sync operation is cancelled by Host.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-04-12 13:10:39 +02:00
Gerard Marull-Paretas
0ebe14beb4 sys: util: migrate all files to DIV_ROUND_UP
ceiling_fraction is deprecated, use DIV_ROUND_UP.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
2023-04-11 12:00:37 +02:00
Vinayak Kariappa Chettimada
8c3c33a970 Bluetooth: Controller: Fix compile error due to missing DF include
Fix compile error due to missing Direction Finding header
file include.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-04-06 12:57:20 +00:00
Vinayak Kariappa Chettimada
b161c7fca4 Bluetooth: Controller: Fix ticker to reduce RTC min compare offset
Fix ticker to explicitly trigger worker when ticks_to_expire
is less than or equal to elapsed time.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-24 12:10:37 +01:00
Vinayak Kariappa Chettimada
925066ae1f Bluetooth: Controller: Continuous scan with ticks_slot_window
Use ticks_slot_window for continuous scanning.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-24 11:32:42 +01:00
Vinayak Kariappa Chettimada
852b3e9e17 Bluetooth: Controller: Reschedule unreserved ticker with slot window
Update ticker implementation to reschedule unreserved ticker
that use ticks_slot_window.

This will avoid unreserved ticker from continuously
overlapping with reserved tickers. And the change is
required to reduce processing overheads before reserve
ticker timeout callback executes.

Unreserved tickers with ticks_slot_window will always yield
to any colliding reserved or unreserved tickers.

The implementation moves unreserved tickers (no ticks_slot
value, in this case continuous scan window) to end of a
colliding reserved/unreserved ticker so that reserved
tickers (like central role) do not have high overheads due
to unreserved ticker's prepare (scanner) be preempted
everytime before reserved ticker's prepare (central).

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-24 11:32:42 +01:00
Jonathan Rico
c84fdfe438 Bluetooth: controller: fix kconfig dependency
BT_TICKER_EXT is being selected undiscriminately, but it's a Zephyr
controller feature.

Signed-off-by: Jonathan Rico <jonathan.rico@nordicsemi.no>
2023-03-22 21:20:22 +01:00
Troels Nilsson
714d74b77b Bluetooth: controller: Use new ticker feature to get offsets
Updated the 3 places in extended advertising where the ticker was
previously inquired about the expiration of another ticker ID in a
separate mayfly (adv_aux, adv_sync and adv_iso). It will now use the
new ticker feature where another ticker IDs expiration info will be
added to the callback.

Channel map updates are now handled in ticker_cb and applied immediately
if the ticker is not running

Signed-off-by: Troels Nilsson <trnn@demant.com>
2023-03-22 08:57:37 +00:00
Troels Nilsson
e990ab941d Bluetooth: controller: Add option for ticker to return expiration info
It is now possible (via the extended ticker interface) to ask for
expiration information for another ticker ID to be returned in the
ticker callback. This utilises the extended ticker interface and a
callback function with a different context to keep the current ticker
interface as unchanged as possible.

Signed-off-by: Troels Nilsson <trnn@demant.com>
2023-03-22 08:57:37 +00:00
Vinayak Kariappa Chettimada
643723479f drivers: flash: nRF: Move sync ticker to Subsys Bluetooth Controller
Move the SoC Flash nRF sync ticker implementation into
Bluetooth Controller Subsystem folder, as internal headers
are included.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-21 12:33:32 +01:00
Vinayak Kariappa Chettimada
b9f9f1ba9c Bluetooth: Controller: Refactor CMakelists.txt for consistency
Refactor the Bluetooth Controller's CMakelists.txt to
consistently use zephyr_library_sources_ifdef() and
zephyr_library_include_directories_ifdef().

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-21 12:33:32 +01:00
Krzysztof Chruscinski
369ffb4929 hal_nordic: Add protection against resource conflict (take 2)
Commit will be squeezed once agreement is reached.

Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
2023-03-20 16:59:40 +01:00
Krzysztof Chruscinski
5af49c1e35 hal_nordic: Add protection against resource conflict
Add check in CMake files to prevent resource overlap for
TIMER0, TIMER1, RTC0.

Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
2023-03-20 16:59:40 +01:00
Krzysztof Chruscinski
9a73b9c80d hal_nordic: Change scheme for RTC and TIMER reservation
In general, RTC and TIMER driver implements counter API but there
are exception when those peripherals are used in a custom way
(e.g. for system timer or bluetooth). In that case, system must
prevent using counter based on a reserved instance. Previously,
it was managed by Kconfig options but that cannot be maintained
when switching to devicetree configuration of the counter driver.

A new approach removes Kconfig options and instead adds static
asserts in the files which are using direct peripherals. Those
asserts check if given node is not enabled in the device tree.

Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
2023-03-20 16:59:40 +01:00
Vinayak Kariappa Chettimada
de9579f297 Bluetooth: Controller: Implement CIS abort_cb to flush tx/rx
Implement a custom abort_cb callback to perform Tx and Rx
flush and adjust the SN/NESN values.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-17 16:07:09 +01:00
Vinayak Kariappa Chettimada
0d54ca8761 Bluetooth: Controller: Fix ull_prepare_dequeue for skipped events
Fix ull_prepare_dequeue to not skip events when preempt
does not match the event in the head of the prepare queue.
The head of the prepare queue does not match when
ull_prepare_dequeue has put the head of the queue to the
last of the queue when it is calling lll_resume interface.
This happens when there is already an active event which
needs a preempt timeout to be setup and there is another
non-resume event in the pipeline which now becomes the
head. The fix ensure to restore the order of the events
if a preempt timeout was to be setup.

Currently ull_prepare_dequeue loops through all events
before stopping at the original way the queue was. This is
not efficient and is a scope for improvement in future.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-17 16:06:54 +01:00
Vinayak Kariappa Chettimada
ceaddc81db Bluetooth: Controller: Fix connected ISO time reservation calculation
Fix Connected ISO time reservation that was missing the
event start and end overhead values.
Fix missing event end overhead values in ACL connection
time reservation.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-17 16:06:32 +01:00
Morten Priess
00c9580914 Bluetooth: controller: Fix offset for CIG with CISes in different ACLs
Calculate CIS offset of secondary CIS(es) using CIG reference point.
This fixes issue with e.g. two CISes associated with separate ACL
connections.

Signed-off-by: Morten Priess <mtpr@oticon.com>
2023-03-17 16:06:18 +01:00
Morten Priess
b8c7506681 Bluetooth: controller: Keep CIS/CIG instances until ll_cig_remove
This commit enables having multiple CIS/CIG setups/connects and
teardowns in sequence.

- For central, cig->lll.num_cis is initialized to cis_count and
  untouched until ll_cig_remove. The value shall indicate number of
  allocated instances, to ensure correct CIG traversal.
- Keep CIG/CIS instances for central until ll_cig_remove
- Initialize CIS instance state vars in ll_cis_create, similar to the
  peripheral flow.
- In ll_cig_remove, always release streams and CIG instance. Do not
  remove paths, as this is done from host at bt_iso_chan_disconnected.
- Remove unsued cis_count member in ll_conn_iso_group.
- Use correct function ull_iso_lll_ack_enqueue at LLL flush to have
  data path respected.

Signed-off-by: Morten Priess <mtpr@oticon.com>
2023-03-17 16:06:18 +01:00
Andries Kruithof
4215854956 Bluetooth: controller: remove refs to LLCP_LEGACY after rebase
Some recent PRs included conditional compilation for
KCONFIG_BT_LL_SW_LLCP_LEGACY, which must be removed.

Signed-off-by: Andries Kruithof <andries.kruithof@nordicsemi.no>
2023-03-17 15:05:05 +01:00
Andries Kruithof
e6a3def17b Bluetooth: controller: remove dependency for slot reservation
The slot reservation code is only valid for the refactored LLCP;
a guard was in place to ensure that it was not compiled in for
legacy controller code. This commit removes this guard

Signed-off-by: Andries Kruithof <andries.kruithof@nordicsemi.no>
2023-03-17 15:05:05 +01:00
Andries Kruithof
729c3e3d83 Bluetooth: controller: remove code related to advanced scheduling
This commit removes the code related to advanced scheduling from
ull_sched.c, since this code only works for the legacy controller.
Implementing advanced scheduling for the refactored LLCP is tracked
in its own issue

Signed-off-by: Andries Kruithof <andries.kruithof@nordicsemi.no>
2023-03-17 15:05:05 +01:00
Andries Kruithof
f6172f3159 Blueotooth: controller: removed delayed notification code
The code that was added for delaying notifications to the host,
which was only implemented for legacy controller, is removed
in this commit

Signed-off-by: Andries Kruithof <andries.kruithof@nordicsemi.no>
2023-03-17 15:05:05 +01:00
Andries Kruithof
2ada005d7c Bluetooth: controller: removing legacy LLCP code
This commit removes the legacy LLCP code including the
Kconfig option
It also updates the babblesim tests, and removes the
tests for the legacy controller

Signed-off-by: Andries Kruithof <andries.kruithof@nordicsemi.no>
2023-03-17 15:05:05 +01:00
Vinayak Kariappa Chettimada
1f52e70fe2 Bluetooth: Controller: Add 'U' suffix when using unsigned variables
Add a 'U' suffix to values, when computing and comparing
against unsigned variables.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-17 11:48:26 +01:00
Vinayak Kariappa Chettimada
9b3a3ee79b Bluetooth: Controller: Add additional LE Channel Selection tests
Add additional custom LE Channel Selection #2 tests to cover
event and subevent mapping.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-17 11:48:26 +01:00
Vinayak Kariappa Chettimada
c3e6edd402 Bluetooth: Controller: Remove redundant use of local variable
Remove redundant use of local variable chan_idx in the
lll_chan_iso_subevent() function.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-17 11:48:26 +01:00
Henrik Møller
86757f5ae5 Bluetooth: controller: Fix channel selection
For ISO-subevents channel selection must use remap table always
-regardless of channel is a mapped or unmapped channel.

Signed-off-by: Henrik Møller <heml@demant.com>
2023-03-17 11:48:26 +01:00
Tomáš Beneš
14138d4a34 Bluetooth: Controller: Add coexistence implementation
To enable Bluetooth controller coexistence feature, there is
implementation of ticker task, which aborts any ongoing radio events
during assertion of the grant pin. This solves the co-existence issue
in the role of the subordinate transceiver.

Signed-off-by: Tomáš Beneš <tomas@dronetag.cz>
2023-03-16 14:37:55 +01:00
Vinayak Kariappa Chettimada
947ef4c96b Bluetooth: Controller: Remove redundant EVENT_IFS_US in BIS timing
Remove redundant EVENT_IFS_US used in Control PDU timing
calculation. The BIG radio event ends with Control Subevent
and hence there is no need to add EVENT_IFS_US at the end
of the BIG event.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-16 13:39:03 +01:00
Vinayak Kariappa Chettimada
ca44b34994 Bluetooth: Controller: Fix ISO Sync Receiver reception abort
Fix ISO Sync Receiver PDU reception to enqueue towards ULL
any PDUs that where received before the BIG event in
unreserved timespace is aborted due to overlap with other
radio events.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-16 13:38:48 +01:00
Wolfgang Puffitsch
b525db221c Bluetooth: controller: Avoid the use of weak functions for ISO data path
Avoid the use of weak functions and call the respective functions only
if vendor-specific data path is supported. The weak dummy functions
will not implement the desired behavior anyway. This change makes it
explicit that these functions need to be implemented by the vendor.

Signed-off-by: Wolfgang Puffitsch <wopu@demant.com>
2023-03-16 11:46:05 +01:00
Nirosharn Amarasinghe
b1fe487bb1 Bluetooth: controller: Release of padding PDUs for framed production
Implemented:
-- Released framed padding PDUs when data received in SDUs for a given
   event do not fully utilise BN.

Signed-off-by: Nirosharn Amarasinghe <niag@demant.com>
2023-03-16 09:17:19 +01:00
Vinayak Kariappa Chettimada
11ad5bf92c Bluetooth: Controller: Inherit BT_ISO_TX_BUF_COUNT value
Inherit BT_ISO_TX_BUF_COUNT value when BT_ISO is enabled
to set BT_CTLR_ISO_TX_BUFFERS count.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-15 08:49:42 -04:00
Vinayak Kariappa Chettimada
c22f40a358 Bluetooth: Controller: Fix max PDU len radio config for BIS Ctrl PDUs
Fix missing radio configuration that limits the maximum PDU
len on reception to consider that Control PDU can be larger
than the max PDU size in the BIS parameters.
Use dedicated PDU buffer for transmission and reception of
BIG Control PDUs so that it is independent of maximum ISO
PDU length which can be less than BIG Control PDU length.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-15 08:49:42 -04:00
Andries Kruithof
02eac5cbc2 Bluetooth: controller: fix compile error when VS cmds disabled
When vendor specific commands are disabled by setting
BT_HCI_VS=n the host still calls bt_read_static_addr,
but that function is not compiled in, resulting in a
build error.
Fixed by moving the code in controller/hci/hci.c
outside of the conditional compile

Signed-off-by: Andries Kruithof <andries.kruithof@nordicsemi.no>
2023-03-10 09:39:23 +01:00
Erik Brockhoff
1028cab11e Revert "Bluetooth: controller: use RX node piggy-back for NTF when possible"
This reverts commit 6dbc446342.

Signed-off-by: Erik Brockhoff <erbr@oticon.com>
2023-03-10 09:30:23 +01:00
Erik Brockhoff
a40434748c Revert "Bluetooth: controller: fixing CIS establish flow for refactored LLCP"
This reverts commit 1d8acfe5fa.

Signed-off-by: Erik Brockhoff <erbr@oticon.com>
2023-03-10 09:30:23 +01:00
Szymon Janc
6ca2dac6a3 bluetooth: controller: Fix build with BT_HCI_VS_EXT disabled
[216/319] Building C object zephyr/subsys/bluetooth/controller/
  CMakeFiles/subsys__bluetooth__controller.dir/hci/hci.c.obj
zephyrproject/zephyr/subsys/bluetooth/controller/hci/hci.c:
   In function 'hci_vendor_cmd_handle_common':
zephyrproject/zephyr/subsys/bluetooth/controller/hci/hci.c:5459:17:
   warning: implicit declaration of function 'vs_set_min_used_chans';
   did you mean 'll_set_min_used_chans'? [-Wimplicit-function-declaration]
 5459 |                 vs_set_min_used_chans(cmd, evt);
      |                 ^~~~~~~~~~~~~~~~~~~~~
      |                 ll_set_min_used_chans
....
zephyr-sdk-0.15.0/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.1.0/../
  ../../../arm-zephyr-eabi/bin/ld.exe: zephyr/subsys/bluetooth/controller/
  libsubsys__bluetooth__controller.a(hci.c.obj): in function
   `hci_vendor_cmd_handle_common':
zephyrproject/zephyr/subsys/bluetooth/controller/hci/hci.c:5459: undefined
   reference to `vs_set_min_used_chans'
collect2.exe: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

Signed-off-by: Szymon Janc <szymon.janc@codecoup.pl>
2023-03-09 11:49:14 +01:00
Vinayak Kariappa Chettimada
c7835e239f Bluetooth: Controller: Remove mesh low lat bsim test workaround
Remove mesh loopback group test workaround introduced in
commit 2a9cd8ffb1 ("Bluetooth: Controller: Add
EVENT_OVERHEAD_START_US when enabling states").

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-07 11:12:23 +01:00
Vinayak Kariappa Chettimada
55c4084c8b Bluetooth: Controller: Fix scan window value corruption
Fix scan window value corruption due to modification of
stored ticks_window value when enabling continuous scan.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
2023-03-07 11:12:23 +01:00
Erik Brockhoff
1d8acfe5fa Bluetooth: controller: fixing CIS establish flow for refactored LLCP
Latest modification to LLCP removed 'monitoring' of cis->established
flag in LLCP, relying instead on signal through ULL.

For this to work properly the signal must also be generated, so this is
introduced. Note - checking of cis->established flag could be removed
if caller ensures only calling once (on establish condition)

Signed-off-by: Erik Brockhoff <erbr@oticon.com>
2023-03-06 17:08:42 +01:00
Erik Brockhoff
6dbc446342 Bluetooth: controller: use RX node piggy-back for NTF when possible
When possible re-use the already allocated RX node for notifications.
Store (retain) RX node and Link element on RX if NTF could occur.
Pass link element to LLCP (ull_cp_rx()) together with RX node.
New RX node type RETAIN introduced to signal retention

When no RX node is available allocate one and hold off TX on procedures
until such time that a node is available for NTF.

In case waiting for NTF buffer avail is needed, allocate and store TX
node to use for TX once NTF becomes available.

CIS Established (incl. timeout handling) is now handled entirely as a
specific event driven by ull_conn_iso - ie removal of procedure check
of cis->established and cis->expire, as this is doubling mechanism
in the conn_iso context.

Unit test and helpers updated to handle new node type.
Function ull_cp_release_ntf() was used only in unit test, so moved to
helper context.
Updating release_ntf to handle the fact that with piggy-backing in test
context the node used for NTF can be from two different memory pools

Signed-off-by: Erik Brockhoff <erbr@oticon.com>
2023-03-06 09:35:10 +01:00