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Bluetooth: Controller: Enable ISO support in the SDC
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This commit enables the experimental ISO support in the SoftDevice
Controller. See the changelog for more details.

Signed-off-by: Rubin Gerritsen <rubin.gerritsen@nordicsemi.no>
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@rugeGerritsen @nordicjm
rugeGerritsen authored and nordicjm committed Oct 5, 2023
1 parent d35ca67 commit b37c09b
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Showing 3 changed files with 453 additions and 1 deletion.
32 changes: 32 additions & 0 deletions subsys/bluetooth/controller/Kconfig
View file
Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,10 @@ config BT_LL_SOFTDEVICE
select BT_CTLR_SYNC_TRANSFER_SENDER_SUPPORT
select BT_CTLR_SYNC_TRANSFER_RECEIVER_SUPPORT
select BT_CTLR_SCA_UPDATE_SUPPORT
select BT_CTLR_PERIPHERAL_ISO_SUPPORT
select BT_CTLR_CENTRAL_ISO_SUPPORT
select BT_CTLR_SYNC_ISO_SUPPORT
select BT_CTLR_ADV_ISO_SUPPORT
select BT_CTLR_PHY_2M_SUPPORT if HAS_HW_NRF_RADIO_BLE_2M
select BT_CTLR_PHY_CODED_SUPPORT if HAS_HW_NRF_RADIO_BLE_CODED
select BT_HAS_HCI_VS
Expand Down Expand Up @@ -131,6 +135,7 @@ config BT_CTLR_SDC_MAX_CONN_EVENT_LEN_DEFAULT_OVERRIDE

config BT_CTLR_SDC_MAX_CONN_EVENT_LEN_DEFAULT
int "Default max connection event length [us]"
default 10000 if BT_ISO && !BT_CTLR_SDC_MAX_CONN_EVENT_LEN_DEFAULT_OVERRIDE
default 7500 if !BT_CTLR_SDC_MAX_CONN_EVENT_LEN_DEFAULT_OVERRIDE
range 1250 4000000
help
Expand Down Expand Up @@ -240,6 +245,7 @@ choice BT_LL_SOFTDEVICE_VARIANT
BT_CTLR_SCA_UPDATE || \
BT_CTLR_SDC_PAWR_ADV || \
BT_CTLR_SDC_PAWR_SYNC || \
BT_ISO || \
SOC_NRF5340_CPUNET)
default BT_LL_SOFTDEVICE_CENTRAL if BT_OBSERVER
default BT_LL_SOFTDEVICE_PERIPHERAL if BT_BROADCASTER
Expand Down Expand Up @@ -270,6 +276,14 @@ config BT_LL_SOFTDEVICE_MULTIROLE

endchoice

config BT_LL_SOFTDEVICE_EXPERIMENTAL_ISO
bool "ISO Support in the SoftDevice Controller [EXPERIMENTAL]"
default BT_ISO
select EXPERIMENTAL
help
ISO support in the SoftDevice Controller is experimental.
It cannot be used in products as per now.

config BT_CTLR_FAL_SIZE
int "Configures the maximum number of addresses in the Filter Accept List"
range 0 255
Expand Down Expand Up @@ -319,6 +333,24 @@ config BT_CTLR_LE_POWER_CONTROL
Enable support for LE Power Control feature that defined in the Bluetooth
Core specification, Version 5.3 | Vol 6, Part B, Section 4.6.31.

config BT_CTLR_SDC_ISO_RX_PDU_BUFFER_COUNT
int "BT_CTLR_SDC_ISO_RX_PDU_BUFFER_COUNT"
depends on BT_CTLR_SYNC_ISO || BT_CTLR_CONN_ISO
range 0 10
default 3

config BT_CTLR_SDC_ISO_TX_HCI_BUFFER_COUNT
int "BT_CTLR_SDC_ISO_TX_HCI_BUFFER_COUNT"
depends on BT_CTLR_ADV_ISO || BT_CTLR_CONN_ISO
range 0 10
default 3

config BT_CTLR_SDC_ISO_TX_PDU_BUFFER_PER_STREAM_COUNT
int "BT_CTLR_SDC_ISO_TX_PDU_BUFFER_PER_STREAM_COUNT"
depends on BT_CTLR_ADV_ISO || BT_CTLR_CONN_ISO
range 1 32
default 3

config BT_UNINIT_MPSL_ON_DISABLE
bool "Uninitializes MPSL on BT disable"
depends on MPSL_DYNAMIC_INTERRUPTS
Expand Down
209 changes: 208 additions & 1 deletion subsys/bluetooth/controller/hci_driver.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -163,6 +163,60 @@ BUILD_ASSERT(!IS_ENABLED(CONFIG_BT_PERIPHERAL) ||

#define SDC_FAL_MEM_SIZE SDC_MEM_FAL(CONFIG_BT_CTLR_FAL_SIZE)

#if defined(CONFIG_BT_CTLR_CONN_ISO)
#define SDC_MEM_CIG SDC_MEM_PER_CIG(CONFIG_BT_CTLR_CONN_ISO_GROUPS)
#define SDC_MEM_CIS \
SDC_MEM_PER_CIS(CONFIG_BT_CTLR_CONN_ISO_STREAMS) + \
SDC_MEM_ISO_RX_SDU_POOL_SIZE(CONFIG_BT_CTLR_CONN_ISO_STREAMS)
#define SDC_CIS_COUNT CONFIG_BT_CTLR_CONN_ISO_STREAMS
#else
#define SDC_MEM_CIG 0
#define SDC_MEM_CIS 0
#define SDC_CIS_COUNT 0
#endif

#if defined(CONFIG_BT_CTLR_SYNC_ISO)
#define SDC_MEM_BIS_SINK \
SDC_MEM_PER_BIG(CONFIG_BT_CTLR_SCAN_SYNC_ISO_SET) + \
SDC_MEM_PER_BIS(CONFIG_BT_CTLR_SYNC_ISO_STREAM_COUNT) + \
SDC_MEM_ISO_RX_SDU_POOL_SIZE(CONFIG_BT_CTLR_SYNC_ISO_STREAM_COUNT)
#define SDC_BIS_SINK_COUNT CONFIG_BT_CTLR_SYNC_ISO_STREAM_COUNT
#else
#define SDC_MEM_BIS_SINK 0
#define SDC_BIS_SINK_COUNT 0
#endif

#if defined(CONFIG_BT_CTLR_ADV_ISO)
#define SDC_MEM_BIS_SOURCE \
SDC_MEM_PER_BIG(CONFIG_BT_CTLR_ADV_ISO_SET) + \
SDC_MEM_PER_BIS(CONFIG_BT_CTLR_ADV_ISO_STREAM_COUNT)
#define SDC_BIS_SOURCE_COUNT CONFIG_BT_CTLR_ADV_ISO_STREAM_COUNT
#else
#define SDC_MEM_BIS_SOURCE 0
#define SDC_BIS_SOURCE_COUNT 0
#endif

#if defined(CONFIG_BT_CTLR_SDC_ISO_RX_PDU_BUFFER_COUNT)
#define SDC_MEM_ISO_RX_POOL \
SDC_MEM_ISO_RX_PDU_POOL_SIZE(CONFIG_BT_CTLR_SDC_ISO_RX_PDU_BUFFER_COUNT)
#else
#define SDC_MEM_ISO_RX_POOL 0
#endif

#if defined(CONFIG_BT_CTLR_SDC_ISO_TX_HCI_BUFFER_COUNT) && \
defined(CONFIG_BT_CTLR_SDC_ISO_TX_PDU_BUFFER_PER_STREAM_COUNT)
#define SDC_MEM_ISO_TX_POOL \
SDC_MEM_ISO_TX_POOL_SIZE(CONFIG_BT_CTLR_SDC_ISO_TX_HCI_BUFFER_COUNT, \
CONFIG_BT_CTLR_SDC_ISO_TX_PDU_BUFFER_PER_STREAM_COUNT, \
SDC_CIS_COUNT, \
(SDC_BIS_SINK_COUNT + SDC_BIS_SOURCE_COUNT))
/* We should not have to allocate TX pool memory for CONFIG_BT_CTLR_SYNC_ISO_STREAM_COUNT,
* but currently bis_count does not differentiate between ADV or SYNC streams.
*/
#else
#define SDC_MEM_ISO_TX_POOL 0
#endif

#define MEMPOOL_SIZE ((PERIPHERAL_COUNT * PERIPHERAL_MEM_SIZE) + \
(SDC_CENTRAL_COUNT * CENTRAL_MEM_SIZE) + \
(SDC_ADV_SET_MEM_SIZE) + \
Expand All @@ -171,7 +225,13 @@ BUILD_ASSERT(!IS_ENABLED(CONFIG_BT_PERIPHERAL) ||
(SDC_PERIODIC_SYNC_MEM_SIZE) + \
(SDC_PERIODIC_ADV_LIST_MEM_SIZE) + \
(SDC_SCAN_BUF_SIZE) + \
(SDC_FAL_MEM_SIZE))
(SDC_FAL_MEM_SIZE) + \
(SDC_MEM_CIG) + \
(SDC_MEM_CIS) + \
(SDC_MEM_BIS_SINK) + \
(SDC_MEM_BIS_SOURCE) + \
(SDC_MEM_ISO_RX_POOL) + \
(SDC_MEM_ISO_TX_POOL))

#if defined(CONFIG_BT_SDC_ADDITIONAL_MEMORY)
__aligned(8) uint8_t sdc_mempool[MEMPOOL_SIZE + CONFIG_BT_SDC_ADDITIONAL_MEMORY];
Expand Down Expand Up @@ -241,6 +301,27 @@ static int acl_handle(struct net_buf *acl)
}
#endif

#if defined(CONFIG_BT_CTLR_ISO_TX_BUFFERS)
static int iso_handle(struct net_buf *acl)
{
LOG_DBG("");

int errcode = MULTITHREADING_LOCK_ACQUIRE();

if (!errcode) {
errcode = sdc_hci_iso_data_put(acl->data);
MULTITHREADING_LOCK_RELEASE();

if (errcode) {
/* Likely buffer overflow event */
receive_signal_raise();
}
}

return errcode;
}
#endif

static int hci_driver_send(struct net_buf *buf)
{
int err;
Expand All @@ -263,6 +344,11 @@ static int hci_driver_send(struct net_buf *buf)
case BT_BUF_CMD:
err = cmd_handle(buf);
break;
#if defined(CONFIG_BT_CTLR_ISO_TX_BUFFERS)
case BT_BUF_ISO_OUT:
err = iso_handle(buf);
break;
#endif
default:
LOG_DBG("Unknown HCI type %u", type);
return -EINVAL;
Expand Down Expand Up @@ -302,6 +388,18 @@ static void data_packet_process(uint8_t *hci_buf)
bt_recv(data_buf);
}

static void iso_data_packet_process(uint8_t *hci_buf)
{
struct net_buf *data_buf = bt_buf_get_rx(BT_BUF_ISO_IN, K_FOREVER);
struct bt_hci_iso_hdr *hdr = (void *)hci_buf;

uint16_t len = sys_le16_to_cpu(hdr->len);

net_buf_add_mem(data_buf, &hci_buf[0], len + sizeof(*hdr));

bt_recv(data_buf);
}

static bool event_packet_is_discardable(const uint8_t *hci_buf)
{
struct bt_hci_evt_hdr *hdr = (void *)hci_buf;
Expand Down Expand Up @@ -409,6 +507,8 @@ static bool fetch_and_process_hci_msg(uint8_t *p_hci_buffer)
event_packet_process(p_hci_buffer);
} else if (msg_type == SDC_HCI_MSG_TYPE_DATA) {
data_packet_process(p_hci_buffer);
} else if (msg_type == SDC_HCI_MSG_TYPE_ISO) {
iso_data_packet_process(p_hci_buffer);
} else {
if (!IS_ENABLED(CONFIG_BT_CTLR_SDC_SILENCE_UNEXPECTED_MSG_TYPE)) {
LOG_ERR("Unexpected msg_type: %u. This if-else needs a new branch",
Expand Down Expand Up @@ -700,6 +800,34 @@ static int configure_supported_features(void)
}
}

if (IS_ENABLED(CONFIG_BT_CTLR_PERIPHERAL_ISO)) {
err = sdc_support_cis_peripheral();
if (err) {
return -ENOTSUP;
}
}

if (IS_ENABLED(CONFIG_BT_CTLR_CENTRAL_ISO)) {
err = sdc_support_cis_central();
if (err) {
return -ENOTSUP;
}
}

if (IS_ENABLED(CONFIG_BT_CTLR_ADV_ISO)) {
err = sdc_support_bis_source();
if (err) {
return -ENOTSUP;
}
}

if (IS_ENABLED(CONFIG_BT_CTLR_SYNC_ISO)) {
err = sdc_support_bis_sink();
if (err) {
return -ENOTSUP;
}
}

return 0;
}

Expand All @@ -708,6 +836,10 @@ static int configure_memory_usage(void)
int required_memory;
sdc_cfg_t cfg;

#if defined(CONFIG_BT_CTLR_SDC_ISO_RX_PDU_BUFFER_COUNT)
uint8_t iso_rx_paths = 0;
#endif

#if !defined(CONFIG_BT_LL_SOFTDEVICE_PERIPHERAL)
cfg.central_count.count = SDC_CENTRAL_COUNT;

Expand Down Expand Up @@ -877,6 +1009,81 @@ static int configure_memory_usage(void)
}
#endif

#if defined(CONFIG_BT_CTLR_CONN_ISO)
cfg.cig_count.count = CONFIG_BT_CTLR_CONN_ISO_GROUPS;
required_memory = sdc_cfg_set(SDC_DEFAULT_RESOURCE_CFG_TAG,
SDC_CFG_TYPE_CIG_COUNT, &cfg);
if (required_memory < 0) {
return required_memory;
}

iso_rx_paths = CONFIG_BT_CTLR_CONN_ISO_STREAMS;
cfg.cis_count.count = CONFIG_BT_CTLR_CONN_ISO_STREAMS;
required_memory = sdc_cfg_set(SDC_DEFAULT_RESOURCE_CFG_TAG,
SDC_CFG_TYPE_CIS_COUNT, &cfg);
if (required_memory < 0) {
return required_memory;
}
#endif /* CONFIG_BT_CTLR_CONN_ISO */

#if defined(CONFIG_BT_CTLR_BROADCAST_ISO)
cfg.big_count.count = 0;
#if defined(CONFIG_BT_CTLR_ADV_ISO)
cfg.big_count.count += CONFIG_BT_CTLR_ADV_ISO_SET;
#endif /* CONFIG_BT_CTLR_ADV_ISO */
#if defined(CONFIG_BT_CTLR_SYNC_ISO)
cfg.big_count.count += CONFIG_BT_CTLR_SCAN_SYNC_ISO_SET;
#endif /* CONFIG_BT_CTLR_SYNC_ISO */
required_memory = sdc_cfg_set(SDC_DEFAULT_RESOURCE_CFG_TAG,
SDC_CFG_TYPE_BIG_COUNT, &cfg);
if (required_memory < 0) {
return required_memory;
}

cfg.bis_count.count = 0;
#if defined(CONFIG_BT_CTLR_ADV_ISO)
cfg.bis_count.count += CONFIG_BT_CTLR_ADV_ISO_STREAM_COUNT;

#endif /* CONFIG_BT_CTLR_ADV_ISO */
#if defined(CONFIG_BT_CTLR_SYNC_ISO)
cfg.bis_count.count += CONFIG_BT_CTLR_SYNC_ISO_STREAM_COUNT;
iso_rx_paths += CONFIG_BT_CTLR_SYNC_ISO_STREAM_COUNT;
#endif /* CONFIG_BT_CTLR_SYNC_ISO */
required_memory = sdc_cfg_set(SDC_DEFAULT_RESOURCE_CFG_TAG,
SDC_CFG_TYPE_BIS_COUNT, &cfg);
if (required_memory < 0) {
return required_memory;
}
#endif /* CONFIG_BT_CTLR_BROADCAST_ISO */

#if defined(CONFIG_BT_CTLR_SDC_ISO_RX_PDU_BUFFER_COUNT)
cfg.iso_rx_pdu_buffer_cfg.count = CONFIG_BT_CTLR_SDC_ISO_RX_PDU_BUFFER_COUNT;
required_memory = sdc_cfg_set(SDC_DEFAULT_RESOURCE_CFG_TAG,
SDC_CFG_TYPE_ISO_RX_PDU_BUFFER_CFG, &cfg);
if (required_memory < 0) {
return required_memory;
}

cfg.iso_rx_sdu_buffer_cfg.count = iso_rx_paths;
required_memory = sdc_cfg_set(SDC_DEFAULT_RESOURCE_CFG_TAG,
SDC_CFG_TYPE_ISO_RX_SDU_BUFFER_CFG, &cfg);
if (required_memory < 0) {
return required_memory;
}
#endif

#if defined(CONFIG_BT_CTLR_SDC_ISO_TX_HCI_BUFFER_COUNT) && \
defined(CONFIG_BT_CTLR_SDC_ISO_TX_PDU_BUFFER_PER_STREAM_COUNT)
cfg.iso_tx_buffer_cfg.tx_hci_buffer_count = CONFIG_BT_CTLR_SDC_ISO_TX_HCI_BUFFER_COUNT;
cfg.iso_tx_buffer_cfg.tx_pdu_buffer_per_stream_count =
CONFIG_BT_CTLR_SDC_ISO_TX_PDU_BUFFER_PER_STREAM_COUNT;
required_memory = sdc_cfg_set(SDC_DEFAULT_RESOURCE_CFG_TAG,
SDC_CFG_TYPE_ISO_TX_BUFFER_CFG, &cfg);
if (required_memory < 0) {
return required_memory;
}
#endif

LOG_DBG("BT mempool size: %u, required: %u",
sizeof(sdc_mempool), required_memory);

Expand Down
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