LinuxLists.cc - [PATCH 1/2] Bluetooth: Add option to enable/disable SCO support

2015-05-22 05:56:04

Subject: [PATCH 1/2] Bluetooth: Add option to enable/disable SCO support

Embedded device may need flexible option to reduce the code size
and memory use

Signed-off-by: Arron Wang <[email protected]>
---
include/net/bluetooth/bluetooth.h | 11 +++++++++++
include/net/bluetooth/hci_core.h | 13 +++++++++++++
net/bluetooth/Kconfig | 10 +++++++++-
net/bluetooth/Makefile | 3 ++-
4 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
index 7dba805..f085ff14 100644
--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -365,8 +365,19 @@ extern struct dentry *bt_debugfs;
int l2cap_init(void);
void l2cap_exit(void);

+#if IS_ENABLED(CONFIG_BT_SCO)
int sco_init(void);
void sco_exit(void);
+#else
+static inline int sco_init(void)
+{
+ return 0;
+}
+
+static inline void sco_exit(void)
+{
+}
+#endif

int mgmt_init(void);
void mgmt_exit(void);
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index a056c2b..7c70034 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -532,8 +532,21 @@ int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
int l2cap_disconn_ind(struct hci_conn *hcon);
int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);

+#if IS_ENABLED(CONFIG_BT_SCO)
int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
+#else
+static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
+ __u8 *flags)
+{
+ return 0;
+}
+
+static inline int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
+{
+ return 0;
+}
+#endif

/* ----- Inquiry cache ----- */
#define INQUIRY_CACHE_AGE_MAX (HZ*30) /* 30 seconds */
diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig
index b8c794b..e7bca37 100644
--- a/net/bluetooth/Kconfig
+++ b/net/bluetooth/Kconfig
@@ -23,10 +23,10 @@ menuconfig BT
Linux Bluetooth subsystem consist of several layers:
Bluetooth Core
HCI device and connection manager, scheduler
- SCO audio links
L2CAP (Logical Link Control and Adaptation Protocol)
SMP (Security Manager Protocol) on LE (Low Energy) links
HCI Device drivers (Interface to the hardware)
+ SCO Module (SCO audio links)
RFCOMM Module (RFCOMM Protocol)
BNEP Module (Bluetooth Network Encapsulation Protocol)
CMTP Module (CAPI Message Transport Protocol)
@@ -45,6 +45,14 @@ config BT_BREDR
depends on BT
default y

+config BT_SCO
+ bool "Bluetooth SCO support"
+ depends on BT_BREDR
+ default y
+ help
+ SCO link provides voice transport over Bluetooth. SCO support is
+ required for voice applications like Headset and Audio.
+
source "net/bluetooth/rfcomm/Kconfig"

source "net/bluetooth/bnep/Kconfig"
diff --git a/net/bluetooth/Makefile b/net/bluetooth/Makefile
index 9a8ea23..21fe57a 100644
--- a/net/bluetooth/Makefile
+++ b/net/bluetooth/Makefile
@@ -12,9 +12,10 @@ obj-$(CONFIG_BT_6LOWPAN) += bluetooth_6lowpan.o
bluetooth_6lowpan-y := 6lowpan.o

bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o mgmt.o \
- hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o sco.o lib.o \
+ hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o lib.o \
a2mp.o amp.o ecc.o hci_request.o mgmt_util.o

+bluetooth-$(CONFIG_BT_SCO) += sco.o
bluetooth-$(CONFIG_BT_DEBUGFS) += hci_debugfs.o
bluetooth-$(CONFIG_BT_SELFTEST) += selftest.o

--
1.7.9.5

2015-05-25 19:06:09

by Marcel Holtmann

[permalink] [raw]

Subject: Re: [PATCH 2/2] Bluetooth: Add option to enable/disable A2MP module

Hi Arron,

> Make Bluetooth 3.0 HS feature configurable
>
> Signed-off-by: Arron Wang <[email protected]>
> ---
> net/bluetooth/Kconfig | 5 +
> net/bluetooth/Makefile | 3 +-
> net/bluetooth/a2mp.h | 19 +++
> net/bluetooth/amp.h | 11 ++
> net/bluetooth/hci_event.c | 260 +-----------------------------------
> net/bluetooth/hci_event_a2mp.c | 283 ++++++++++++++++++++++++++++++++++++++++
> net/bluetooth/hci_event_a2mp.h | 91 +++++++++++++
> 7 files changed, 412 insertions(+), 260 deletions(-)
> create mode 100644 net/bluetooth/hci_event_a2mp.c
> create mode 100644 net/bluetooth/hci_event_a2mp.h

I don’t think this is the solution here. I think A2MP support should be self contained and utilises the synchronous HCI command framework we have in place and also use in mgmt.

> diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig
> index e7bca37..a558c66 100644
> --- a/net/bluetooth/Kconfig
> +++ b/net/bluetooth/Kconfig
> @@ -27,6 +27,7 @@ menuconfig BT
> SMP (Security Manager Protocol) on LE (Low Energy) links
> HCI Device drivers (Interface to the hardware)
> SCO Module (SCO audio links)
> + A2MP Module (AMP Manager Protocol)
> RFCOMM Module (RFCOMM Protocol)
> BNEP Module (Bluetooth Network Encapsulation Protocol)
> CMTP Module (CAPI Message Transport Protocol)
> @@ -53,6 +54,10 @@ config BT_SCO
> SCO link provides voice transport over Bluetooth. SCO support is
> required for voice applications like Headset and Audio.
>
> +config BT_A2MP
> + bool "Bluetooth Alternate MAC/PHY (AMP) features"
> + depends on BT_BREDR
> +

The option name you are looking for for BT_HS for high speed support. A2MP and AMP support should be hidden behind that config option.

Regards

Marcel

2015-05-25 19:06:07

by Marcel Holtmann

[permalink] [raw]

Subject: Re: [PATCH 1/2] Bluetooth: Add option to enable/disable SCO support

Hi Arron,

> Embedded device may need flexible option to reduce the code size
> and memory use
>
> Signed-off-by: Arron Wang <[email protected]>
> ---
> include/net/bluetooth/bluetooth.h | 11 +++++++++++
> include/net/bluetooth/hci_core.h | 13 +++++++++++++
> net/bluetooth/Kconfig | 10 +++++++++-
> net/bluetooth/Makefile | 3 ++-
> 4 files changed, 35 insertions(+), 2 deletions(-)
>
> diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
> index 7dba805..f085ff14 100644
> --- a/include/net/bluetooth/bluetooth.h
> +++ b/include/net/bluetooth/bluetooth.h
> @@ -365,8 +365,19 @@ extern struct dentry *bt_debugfs;
> int l2cap_init(void);
> void l2cap_exit(void);
>
> +#if IS_ENABLED(CONFIG_BT_SCO)
> int sco_init(void);
> void sco_exit(void);
> +#else
> +static inline int sco_init(void)
> +{
> + return 0;
> +}
> +
> +static inline void sco_exit(void)
> +{
> +}
> +#endif
>
> int mgmt_init(void);
> void mgmt_exit(void);
> diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
> index a056c2b..7c70034 100644
> --- a/include/net/bluetooth/hci_core.h
> +++ b/include/net/bluetooth/hci_core.h
> @@ -532,8 +532,21 @@ int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
> int l2cap_disconn_ind(struct hci_conn *hcon);
> int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
>
> +#if IS_ENABLED(CONFIG_BT_SCO)
> int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
> int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
> +#else
> +static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
> + __u8 *flags)
> +{
> + return 0;
> +}

shouldn’t this return an error?

> +
> +static inline int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
> +{
> + return 0;

I wonder now why this is returning anything at all. Should we maybe make this void in the first place?

> +}
> +#endif
>
> /* ----- Inquiry cache ----- */
> #define INQUIRY_CACHE_AGE_MAX (HZ*30) /* 30 seconds */
> diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig
> index b8c794b..e7bca37 100644
> --- a/net/bluetooth/Kconfig
> +++ b/net/bluetooth/Kconfig
> @@ -23,10 +23,10 @@ menuconfig BT
> Linux Bluetooth subsystem consist of several layers:
> Bluetooth Core
> HCI device and connection manager, scheduler
> - SCO audio links
> L2CAP (Logical Link Control and Adaptation Protocol)
> SMP (Security Manager Protocol) on LE (Low Energy) links
> HCI Device drivers (Interface to the hardware)
> + SCO Module (SCO audio links)
> RFCOMM Module (RFCOMM Protocol)
> BNEP Module (Bluetooth Network Encapsulation Protocol)
> CMTP Module (CAPI Message Transport Protocol)
> @@ -45,6 +45,14 @@ config BT_BREDR
> depends on BT
> default y
>
> +config BT_SCO
> + bool "Bluetooth SCO support"
> + depends on BT_BREDR
> + default y
> + help
> + SCO link provides voice transport over Bluetooth. SCO support is
> + required for voice applications like Headset and Audio.
> +

This can be all hidden behind the BT_BREDR config option. No need to create another one. BR/EDR without SCO/eSCO support is a pretty useless offer. And if you do BR/EDR, then the little extra SCO socket handling is not big overhead.

> source "net/bluetooth/rfcomm/Kconfig"
>
> source "net/bluetooth/bnep/Kconfig"
> diff --git a/net/bluetooth/Makefile b/net/bluetooth/Makefile
> index 9a8ea23..21fe57a 100644
> --- a/net/bluetooth/Makefile
> +++ b/net/bluetooth/Makefile
> @@ -12,9 +12,10 @@ obj-$(CONFIG_BT_6LOWPAN) += bluetooth_6lowpan.o
> bluetooth_6lowpan-y := 6lowpan.o
>
> bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o mgmt.o \
> - hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o sco.o lib.o \
> + hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o lib.o \
> a2mp.o amp.o ecc.o hci_request.o mgmt_util.o
>
> +bluetooth-$(CONFIG_BT_SCO) += sco.o
> bluetooth-$(CONFIG_BT_DEBUGFS) += hci_debugfs.o
> bluetooth-$(CONFIG_BT_SELFTEST) += selftest.o

Regards

Marcel

2015-05-22 05:56:05

by Arron Wang

[permalink] [raw]

Subject: [PATCH 2/2] Bluetooth: Add option to enable/disable A2MP module

Make Bluetooth 3.0 HS feature configurable

Signed-off-by: Arron Wang <[email protected]>
---
net/bluetooth/Kconfig | 5 +
net/bluetooth/Makefile | 3 +-
net/bluetooth/a2mp.h | 19 +++
net/bluetooth/amp.h | 11 ++
net/bluetooth/hci_event.c | 260 +-----------------------------------
net/bluetooth/hci_event_a2mp.c | 283 ++++++++++++++++++++++++++++++++++++++++
net/bluetooth/hci_event_a2mp.h | 91 +++++++++++++
7 files changed, 412 insertions(+), 260 deletions(-)
create mode 100644 net/bluetooth/hci_event_a2mp.c
create mode 100644 net/bluetooth/hci_event_a2mp.h

diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig
index e7bca37..a558c66 100644
--- a/net/bluetooth/Kconfig
+++ b/net/bluetooth/Kconfig
@@ -27,6 +27,7 @@ menuconfig BT
SMP (Security Manager Protocol) on LE (Low Energy) links
HCI Device drivers (Interface to the hardware)
SCO Module (SCO audio links)
+ A2MP Module (AMP Manager Protocol)
RFCOMM Module (RFCOMM Protocol)
BNEP Module (Bluetooth Network Encapsulation Protocol)
CMTP Module (CAPI Message Transport Protocol)
@@ -53,6 +54,10 @@ config BT_SCO
SCO link provides voice transport over Bluetooth. SCO support is
required for voice applications like Headset and Audio.

+config BT_A2MP
+ bool "Bluetooth Alternate MAC/PHY (AMP) features"
+ depends on BT_BREDR
+
source "net/bluetooth/rfcomm/Kconfig"

source "net/bluetooth/bnep/Kconfig"
diff --git a/net/bluetooth/Makefile b/net/bluetooth/Makefile
index 21fe57a..a87fc90 100644
--- a/net/bluetooth/Makefile
+++ b/net/bluetooth/Makefile
@@ -13,9 +13,10 @@ bluetooth_6lowpan-y := 6lowpan.o

bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o mgmt.o \
hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o lib.o \
- a2mp.o amp.o ecc.o hci_request.o mgmt_util.o
+ ecc.o hci_request.o mgmt_util.o

bluetooth-$(CONFIG_BT_SCO) += sco.o
+bluetooth-$(CONFIG_BT_A2MP) += a2mp.o amp.o hci_event_a2mp.o
bluetooth-$(CONFIG_BT_DEBUGFS) += hci_debugfs.o
bluetooth-$(CONFIG_BT_SELFTEST) += selftest.o

diff --git a/net/bluetooth/a2mp.h b/net/bluetooth/a2mp.h
index 296f665..d92577a 100644
--- a/net/bluetooth/a2mp.h
+++ b/net/bluetooth/a2mp.h
@@ -130,10 +130,29 @@ struct a2mp_physlink_rsp {
#define A2MP_STATUS_SECURITY_VIOLATION 0x06

struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr);
+
+#if IS_ENABLED(CONFIG_BT_A2MP)
int amp_mgr_put(struct amp_mgr *mgr);
struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
struct sk_buff *skb);
void a2mp_discover_amp(struct l2cap_chan *chan);
+#else
+static inline int amp_mgr_put(struct amp_mgr *mgr)
+{
+ return 0;
+}
+
+static inline struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
+ struct sk_buff *skb)
+{
+ return NULL;
+}
+
+static inline void a2mp_discover_amp(struct l2cap_chan *chan)
+{
+}
+#endif
+
void a2mp_send_getinfo_rsp(struct hci_dev *hdev);
void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status);
void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status);
diff --git a/net/bluetooth/amp.h b/net/bluetooth/amp.h
index 7ea3db7..508b06d 100644
--- a/net/bluetooth/amp.h
+++ b/net/bluetooth/amp.h
@@ -47,8 +47,19 @@ void amp_accept_phylink(struct hci_dev *hdev, struct amp_mgr *mgr,
void amp_write_remote_assoc(struct hci_dev *hdev, u8 handle);
void amp_write_rem_assoc_continue(struct hci_dev *hdev, u8 handle);
void amp_physical_cfm(struct hci_conn *bredr_hcon, struct hci_conn *hs_hcon);
+
+#if IS_ENABLED(CONFIG_BT_A2MP)
void amp_create_logical_link(struct l2cap_chan *chan);
void amp_disconnect_logical_link(struct hci_chan *hchan);
+#else
+static inline void amp_create_logical_link(struct l2cap_chan *chan)
+{
+}
+
+static inline void amp_disconnect_logical_link(struct hci_chan *hchan)
+{
+}
+#endif
void amp_destroy_logical_link(struct hci_chan *hchan, u8 reason);

#endif /* __AMP_H */
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 7b61be7..de913087 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -32,9 +32,8 @@

#include "hci_request.h"
#include "hci_debugfs.h"
-#include "a2mp.h"
-#include "amp.h"
#include "smp.h"
+#include "hci_event_a2mp.h"

#define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00\x00\x00\x00\x00"
@@ -815,68 +814,6 @@ unlock:
hci_dev_unlock(hdev);
}

-static void hci_cc_read_local_amp_info(struct hci_dev *hdev,
- struct sk_buff *skb)
-{
- struct hci_rp_read_local_amp_info *rp = (void *) skb->data;
-
- BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
-
- if (rp->status)
- goto a2mp_rsp;
-
- hdev->amp_status = rp->amp_status;
- hdev->amp_total_bw = __le32_to_cpu(rp->total_bw);
- hdev->amp_max_bw = __le32_to_cpu(rp->max_bw);
- hdev->amp_min_latency = __le32_to_cpu(rp->min_latency);
- hdev->amp_max_pdu = __le32_to_cpu(rp->max_pdu);
- hdev->amp_type = rp->amp_type;
- hdev->amp_pal_cap = __le16_to_cpu(rp->pal_cap);
- hdev->amp_assoc_size = __le16_to_cpu(rp->max_assoc_size);
- hdev->amp_be_flush_to = __le32_to_cpu(rp->be_flush_to);
- hdev->amp_max_flush_to = __le32_to_cpu(rp->max_flush_to);
-
-a2mp_rsp:
- a2mp_send_getinfo_rsp(hdev);
-}
-
-static void hci_cc_read_local_amp_assoc(struct hci_dev *hdev,
- struct sk_buff *skb)
-{
- struct hci_rp_read_local_amp_assoc *rp = (void *) skb->data;
- struct amp_assoc *assoc = &hdev->loc_assoc;
- size_t rem_len, frag_len;
-
- BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
-
- if (rp->status)
- goto a2mp_rsp;
-
- frag_len = skb->len - sizeof(*rp);
- rem_len = __le16_to_cpu(rp->rem_len);
-
- if (rem_len > frag_len) {
- BT_DBG("frag_len %zu rem_len %zu", frag_len, rem_len);
-
- memcpy(assoc->data + assoc->offset, rp->frag, frag_len);
- assoc->offset += frag_len;
-
- /* Read other fragments */
- amp_read_loc_assoc_frag(hdev, rp->phy_handle);
-
- return;
- }
-
- memcpy(assoc->data + assoc->offset, rp->frag, rem_len);
- assoc->len = assoc->offset + rem_len;
- assoc->offset = 0;
-
-a2mp_rsp:
- /* Send A2MP Rsp when all fragments are received */
- a2mp_send_getampassoc_rsp(hdev, rp->status);
- a2mp_send_create_phy_link_req(hdev, rp->status);
-}
-
static void hci_cc_read_inq_rsp_tx_power(struct hci_dev *hdev,
struct sk_buff *skb)
{
@@ -1409,20 +1346,6 @@ static void hci_cc_set_adv_param(struct hci_dev *hdev, struct sk_buff *skb)
hci_dev_unlock(hdev);
}

-static void hci_cc_write_remote_amp_assoc(struct hci_dev *hdev,
- struct sk_buff *skb)
-{
- struct hci_rp_write_remote_amp_assoc *rp = (void *) skb->data;
-
- BT_DBG("%s status 0x%2.2x phy_handle 0x%2.2x",
- hdev->name, rp->status, rp->phy_handle);
-
- if (rp->status)
- return;
-
- amp_write_rem_assoc_continue(hdev, rp->phy_handle);
-}
-
static void hci_cc_read_rssi(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_rp_read_rssi *rp = (void *) skb->data;
@@ -1944,47 +1867,6 @@ static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
hci_dev_unlock(hdev);
}

-static void hci_cs_create_phylink(struct hci_dev *hdev, u8 status)
-{
- struct hci_cp_create_phy_link *cp;
-
- BT_DBG("%s status 0x%2.2x", hdev->name, status);
-
- cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_PHY_LINK);
- if (!cp)
- return;
-
- hci_dev_lock(hdev);
-
- if (status) {
- struct hci_conn *hcon;
-
- hcon = hci_conn_hash_lookup_handle(hdev, cp->phy_handle);
- if (hcon)
- hci_conn_del(hcon);
- } else {
- amp_write_remote_assoc(hdev, cp->phy_handle);
- }
-
- hci_dev_unlock(hdev);
-}
-
-static void hci_cs_accept_phylink(struct hci_dev *hdev, u8 status)
-{
- struct hci_cp_accept_phy_link *cp;
-
- BT_DBG("%s status 0x%2.2x", hdev->name, status);
-
- if (status)
- return;
-
- cp = hci_sent_cmd_data(hdev, HCI_OP_ACCEPT_PHY_LINK);
- if (!cp)
- return;
-
- amp_write_remote_assoc(hdev, cp->phy_handle);
-}
-
static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
{
struct hci_cp_le_create_conn *cp;
@@ -4313,130 +4195,6 @@ unlock:
hci_dev_unlock(hdev);
}

-static void hci_phy_link_complete_evt(struct hci_dev *hdev,
- struct sk_buff *skb)
-{
- struct hci_ev_phy_link_complete *ev = (void *) skb->data;
- struct hci_conn *hcon, *bredr_hcon;
-
- BT_DBG("%s handle 0x%2.2x status 0x%2.2x", hdev->name, ev->phy_handle,
- ev->status);
-
- hci_dev_lock(hdev);
-
- hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
- if (!hcon) {
- hci_dev_unlock(hdev);
- return;
- }
-
- if (ev->status) {
- hci_conn_del(hcon);
- hci_dev_unlock(hdev);
- return;
- }
-
- bredr_hcon = hcon->amp_mgr->l2cap_conn->hcon;
-
- hcon->state = BT_CONNECTED;
- bacpy(&hcon->dst, &bredr_hcon->dst);
-
- hci_conn_hold(hcon);
- hcon->disc_timeout = HCI_DISCONN_TIMEOUT;
- hci_conn_drop(hcon);
-
- hci_debugfs_create_conn(hcon);
- hci_conn_add_sysfs(hcon);
-
- amp_physical_cfm(bredr_hcon, hcon);
-
- hci_dev_unlock(hdev);
-}
-
-static void hci_loglink_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
-{
- struct hci_ev_logical_link_complete *ev = (void *) skb->data;
- struct hci_conn *hcon;
- struct hci_chan *hchan;
- struct amp_mgr *mgr;
-
- BT_DBG("%s log_handle 0x%4.4x phy_handle 0x%2.2x status 0x%2.2x",
- hdev->name, le16_to_cpu(ev->handle), ev->phy_handle,
- ev->status);
-
- hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
- if (!hcon)
- return;
-
- /* Create AMP hchan */
- hchan = hci_chan_create(hcon);
- if (!hchan)
- return;
-
- hchan->handle = le16_to_cpu(ev->handle);
-
- BT_DBG("hcon %p mgr %p hchan %p", hcon, hcon->amp_mgr, hchan);
-
- mgr = hcon->amp_mgr;
- if (mgr && mgr->bredr_chan) {
- struct l2cap_chan *bredr_chan = mgr->bredr_chan;
-
- l2cap_chan_lock(bredr_chan);
-
- bredr_chan->conn->mtu = hdev->block_mtu;
- l2cap_logical_cfm(bredr_chan, hchan, 0);
- hci_conn_hold(hcon);
-
- l2cap_chan_unlock(bredr_chan);
- }
-}
-
-static void hci_disconn_loglink_complete_evt(struct hci_dev *hdev,
- struct sk_buff *skb)
-{
- struct hci_ev_disconn_logical_link_complete *ev = (void *) skb->data;
- struct hci_chan *hchan;
-
- BT_DBG("%s log handle 0x%4.4x status 0x%2.2x", hdev->name,
- le16_to_cpu(ev->handle), ev->status);
-
- if (ev->status)
- return;
-
- hci_dev_lock(hdev);
-
- hchan = hci_chan_lookup_handle(hdev, le16_to_cpu(ev->handle));
- if (!hchan)
- goto unlock;
-
- amp_destroy_logical_link(hchan, ev->reason);
-
-unlock:
- hci_dev_unlock(hdev);
-}
-
-static void hci_disconn_phylink_complete_evt(struct hci_dev *hdev,
- struct sk_buff *skb)
-{
- struct hci_ev_disconn_phy_link_complete *ev = (void *) skb->data;
- struct hci_conn *hcon;
-
- BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
-
- if (ev->status)
- return;
-
- hci_dev_lock(hdev);
-
- hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
- if (hcon) {
- hcon->state = BT_CLOSED;
- hci_conn_del(hcon);
- }
-
- hci_dev_unlock(hdev);
-}
-
static void hci_le_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_le_conn_complete *ev = (void *) skb->data;
@@ -5119,22 +4877,6 @@ static void hci_le_meta_evt(struct hci_dev *hdev, struct sk_buff *skb)
}
}

-static void hci_chan_selected_evt(struct hci_dev *hdev, struct sk_buff *skb)
-{
- struct hci_ev_channel_selected *ev = (void *) skb->data;
- struct hci_conn *hcon;
-
- BT_DBG("%s handle 0x%2.2x", hdev->name, ev->phy_handle);
-
- skb_pull(skb, sizeof(*ev));
-
- hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
- if (!hcon)
- return;
-
- amp_read_loc_assoc_final_data(hdev, hcon);
-}
-
static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
u8 event, struct sk_buff *skb)
{
diff --git a/net/bluetooth/hci_event_a2mp.c b/net/bluetooth/hci_event_a2mp.c
new file mode 100644
index 0000000..587f9fb7
--- /dev/null
+++ b/net/bluetooth/hci_event_a2mp.c
@@ -0,0 +1,283 @@
+/*
+ BlueZ - Bluetooth protocol stack for Linux
+ Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
+
+ Written 2000,2001 by Maxim Krasnyansky <[email protected]>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License version 2 as
+ published by the Free Software Foundation;
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+ IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+ CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+ ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+ COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+ SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth HCI A2MP event handling. */
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "hci_debugfs.h"
+#include "a2mp.h"
+#include "amp.h"
+
+void hci_cc_read_local_amp_info(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_rp_read_local_amp_info *rp = (void *)skb->data;
+
+ BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+ if (rp->status)
+ goto a2mp_rsp;
+
+ hdev->amp_status = rp->amp_status;
+ hdev->amp_total_bw = __le32_to_cpu(rp->total_bw);
+ hdev->amp_max_bw = __le32_to_cpu(rp->max_bw);
+ hdev->amp_min_latency = __le32_to_cpu(rp->min_latency);
+ hdev->amp_max_pdu = __le32_to_cpu(rp->max_pdu);
+ hdev->amp_type = rp->amp_type;
+ hdev->amp_pal_cap = __le16_to_cpu(rp->pal_cap);
+ hdev->amp_assoc_size = __le16_to_cpu(rp->max_assoc_size);
+ hdev->amp_be_flush_to = __le32_to_cpu(rp->be_flush_to);
+ hdev->amp_max_flush_to = __le32_to_cpu(rp->max_flush_to);
+
+a2mp_rsp:
+ a2mp_send_getinfo_rsp(hdev);
+}
+
+void hci_cc_read_local_amp_assoc(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_rp_read_local_amp_assoc *rp = (void *)skb->data;
+ struct amp_assoc *assoc = &hdev->loc_assoc;
+ size_t rem_len, frag_len;
+
+ BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
+
+ if (rp->status)
+ goto a2mp_rsp;
+
+ frag_len = skb->len - sizeof(*rp);
+ rem_len = __le16_to_cpu(rp->rem_len);
+
+ if (rem_len > frag_len) {
+ BT_DBG("frag_len %zu rem_len %zu", frag_len, rem_len);
+
+ memcpy(assoc->data + assoc->offset, rp->frag, frag_len);
+ assoc->offset += frag_len;
+
+ /* Read other fragments */
+ amp_read_loc_assoc_frag(hdev, rp->phy_handle);
+
+ return;
+ }
+
+ memcpy(assoc->data + assoc->offset, rp->frag, rem_len);
+ assoc->len = assoc->offset + rem_len;
+ assoc->offset = 0;
+
+a2mp_rsp:
+ /* Send A2MP Rsp when all fragments are received */
+ a2mp_send_getampassoc_rsp(hdev, rp->status);
+ a2mp_send_create_phy_link_req(hdev, rp->status);
+}
+
+void hci_cc_write_remote_amp_assoc(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_rp_write_remote_amp_assoc *rp = (void *)skb->data;
+
+ BT_DBG("%s status 0x%2.2x phy_handle 0x%2.2x",
+ hdev->name, rp->status, rp->phy_handle);
+
+ if (rp->status)
+ return;
+
+ amp_write_rem_assoc_continue(hdev, rp->phy_handle);
+}
+
+void hci_cs_create_phylink(struct hci_dev *hdev, u8 status)
+{
+ struct hci_cp_create_phy_link *cp;
+
+ BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+ cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_PHY_LINK);
+ if (!cp)
+ return;
+
+ hci_dev_lock(hdev);
+
+ if (status) {
+ struct hci_conn *hcon;
+
+ hcon = hci_conn_hash_lookup_handle(hdev, cp->phy_handle);
+ if (hcon)
+ hci_conn_del(hcon);
+ } else {
+ amp_write_remote_assoc(hdev, cp->phy_handle);
+ }
+
+ hci_dev_unlock(hdev);
+}
+
+void hci_cs_accept_phylink(struct hci_dev *hdev, u8 status)
+{
+ struct hci_cp_accept_phy_link *cp;
+
+ BT_DBG("%s status 0x%2.2x", hdev->name, status);
+
+ if (status)
+ return;
+
+ cp = hci_sent_cmd_data(hdev, HCI_OP_ACCEPT_PHY_LINK);
+ if (!cp)
+ return;
+
+ amp_write_remote_assoc(hdev, cp->phy_handle);
+}
+
+void hci_chan_selected_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_ev_channel_selected *ev = (void *)skb->data;
+ struct hci_conn *hcon;
+
+ BT_DBG("%s handle 0x%2.2x", hdev->name, ev->phy_handle);
+
+ skb_pull(skb, sizeof(*ev));
+
+ hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
+ if (!hcon)
+ return;
+
+ amp_read_loc_assoc_final_data(hdev, hcon);
+}
+
+void hci_phy_link_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_ev_phy_link_complete *ev = (void *)skb->data;
+ struct hci_conn *hcon, *bredr_hcon;
+
+ BT_DBG("%s handle 0x%2.2x status 0x%2.2x", hdev->name, ev->phy_handle,
+ ev->status);
+
+ hci_dev_lock(hdev);
+
+ hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
+ if (!hcon) {
+ hci_dev_unlock(hdev);
+ return;
+ }
+
+ if (ev->status) {
+ hci_conn_del(hcon);
+ hci_dev_unlock(hdev);
+ return;
+ }
+
+ bredr_hcon = hcon->amp_mgr->l2cap_conn->hcon;
+
+ hcon->state = BT_CONNECTED;
+ bacpy(&hcon->dst, &bredr_hcon->dst);
+
+ hci_conn_hold(hcon);
+ hcon->disc_timeout = HCI_DISCONN_TIMEOUT;
+ hci_conn_drop(hcon);
+
+ hci_debugfs_create_conn(hcon);
+ hci_conn_add_sysfs(hcon);
+
+ amp_physical_cfm(bredr_hcon, hcon);
+
+ hci_dev_unlock(hdev);
+}
+
+void hci_loglink_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_ev_logical_link_complete *ev = (void *)skb->data;
+ struct hci_conn *hcon;
+ struct hci_chan *hchan;
+ struct amp_mgr *mgr;
+
+ BT_DBG("%s log_handle 0x%4.4x phy_handle 0x%2.2x status 0x%2.2x",
+ hdev->name, le16_to_cpu(ev->handle), ev->phy_handle,
+ ev->status);
+
+ hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
+ if (!hcon)
+ return;
+
+ /* Create AMP hchan */
+ hchan = hci_chan_create(hcon);
+ if (!hchan)
+ return;
+
+ hchan->handle = le16_to_cpu(ev->handle);
+
+ BT_DBG("hcon %p mgr %p hchan %p", hcon, hcon->amp_mgr, hchan);
+
+ mgr = hcon->amp_mgr;
+ if (mgr && mgr->bredr_chan) {
+ struct l2cap_chan *bredr_chan = mgr->bredr_chan;
+
+ l2cap_chan_lock(bredr_chan);
+
+ bredr_chan->conn->mtu = hdev->block_mtu;
+ l2cap_logical_cfm(bredr_chan, hchan, 0);
+ hci_conn_hold(hcon);
+
+ l2cap_chan_unlock(bredr_chan);
+ }
+}
+
+void hci_disconn_loglink_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_ev_disconn_logical_link_complete *ev = (void *)skb->data;
+ struct hci_chan *hchan;
+
+ BT_DBG("%s log handle 0x%4.4x status 0x%2.2x", hdev->name,
+ le16_to_cpu(ev->handle), ev->status);
+
+ if (ev->status)
+ return;
+
+ hci_dev_lock(hdev);
+
+ hchan = hci_chan_lookup_handle(hdev, le16_to_cpu(ev->handle));
+ if (!hchan)
+ goto unlock;
+
+ amp_destroy_logical_link(hchan, ev->reason);
+
+unlock:
+ hci_dev_unlock(hdev);
+}
+
+void hci_disconn_phylink_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_ev_disconn_phy_link_complete *ev = (void *)skb->data;
+ struct hci_conn *hcon;
+
+ BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+ if (ev->status)
+ return;
+
+ hci_dev_lock(hdev);
+
+ hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
+ if (hcon) {
+ hcon->state = BT_CLOSED;
+ hci_conn_del(hcon);
+ }
+
+ hci_dev_unlock(hdev);
+}
diff --git a/net/bluetooth/hci_event_a2mp.h b/net/bluetooth/hci_event_a2mp.h
new file mode 100644
index 0000000..2625431
--- /dev/null
+++ b/net/bluetooth/hci_event_a2mp.h
@@ -0,0 +1,91 @@
+/*
+ BlueZ - Bluetooth protocol stack for Linux
+ Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
+
+ Written 2000,2001 by Maxim Krasnyansky <[email protected]>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License version 2 as
+ published by the Free Software Foundation;
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+ IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+ CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+ ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+ COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+ SOFTWARE IS DISCLAIMED.
+*/
+
+#ifndef __HCI_EVENT_A2MP_H
+#define __HCI_EVENT_A2MP_H
+
+#if IS_ENABLED(CONFIG_BT_A2MP)
+void hci_cc_read_local_amp_info(struct hci_dev *hdev, struct sk_buff *skb);
+void hci_cc_read_local_amp_assoc(struct hci_dev *hdev, struct sk_buff *skb);
+void hci_cc_write_remote_amp_assoc(struct hci_dev *hdev, struct sk_buff *skb);
+void hci_cs_create_phylink(struct hci_dev *hdev, u8 status);
+void hci_cs_accept_phylink(struct hci_dev *hdev, u8 status);
+void hci_chan_selected_evt(struct hci_dev *hdev, struct sk_buff *skb);
+void hci_phy_link_complete_evt(struct hci_dev *hdev, struct sk_buff *skb);
+void hci_loglink_complete_evt(struct hci_dev *hdev, struct sk_buff *skb);
+void hci_disconn_loglink_complete_evt(struct hci_dev *hdev,
+ struct sk_buff *skb);
+void hci_disconn_phylink_complete_evt(struct hci_dev *hdev,
+ struct sk_buff *skb);
+#else
+static inline void hci_cc_read_local_amp_info(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+}
+
+static inline void hci_cc_read_local_amp_assoc(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+}
+
+static inline void hci_cc_write_remote_amp_assoc(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+}
+
+static inline void hci_cs_create_phylink(struct hci_dev *hdev, u8 status)
+{
+}
+
+static inline void hci_cs_accept_phylink(struct hci_dev *hdev, u8 status)
+{
+}
+
+static inline void hci_chan_selected_evt(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+}
+
+static inline void hci_phy_link_complete_evt(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+}
+
+static inline void hci_loglink_complete_evt(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+}
+
+static inline void hci_disconn_loglink_complete_evt(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+}
+
+static inline void hci_disconn_phylink_complete_evt(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+}
+#endif
+
+#endif /* __HCI_EVENT_A2MP_H */
--
1.7.9.5

2015-06-09 12:04:02

by Marcel Holtmann

[permalink] [raw]

Subject: Re: [PATCH 2/2] Bluetooth: Add option to enable/disable A2MP module

Hi Arron,

>>>>> Make Bluetooth 3.0 HS feature configurable
>>>>>
>>>>> Signed-off-by: Arron Wang <[email protected]>
>>>>> ---
>>>>> net/bluetooth/Kconfig | 5 +
>>>>> net/bluetooth/Makefile | 3 +-
>>>>> net/bluetooth/a2mp.h | 19 +++
>>>>> net/bluetooth/amp.h | 11 ++
>>>>> net/bluetooth/hci_event.c | 260 +-----------------------------------
>>>>> net/bluetooth/hci_event_a2mp.c | 283
>>>> ++++++++++++++++++++++++++++++++++++++++
>>>>> net/bluetooth/hci_event_a2mp.h | 91 +++++++++++++
>>>>> 7 files changed, 412 insertions(+), 260 deletions(-) create mode
>>>>> 100644 net/bluetooth/hci_event_a2mp.c create mode 100644
>>>>> net/bluetooth/hci_event_a2mp.h
>>>>
>>>> I don’t think this is the solution here. I think A2MP support should
>>>> be self contained and utilises the synchronous HCI command framework
>>>> we have in place and also use in mgmt.
>>>
>>> Yes, create a separate file for hci a2mp event maybe not suitable, but there are
>> many hci ops/events for different Bluetooth controller BREDR/AMP/LE, add the
>> macro to separate them in one file may not easy to maintain, can we move these
>> AMP releated hci ops/event function to file amp.c?
>>
>> unless it has some complicated state machine impact, using the hci_request
>> infrastructure should be preferred compared to go through callback handlers in
>> hci_event.c. So first of all it needs to be investigated which of the A2MP HCI
>> functions can be turned into using hci_request.
>
> I found the current A2MP functions already use hci_request send command to hci subsystem, in hci_event.c they just invoke these functions, we can define these functions as inline but I not sure whether we also should put A2MP related events under BT_HS config option.

I am actually seeing hci_send_cmd being used a lot in amp.c.

Regards

Marcel

2015-06-09 09:45:46

by Arron Wang

[permalink] [raw]

Subject: RE: [PATCH 2/2] Bluetooth: Add option to enable/disable A2MP module

Hi Marcel,

>-----Original Message-----
>From: Marcel Holtmann [mailto:[email protected]]
>Sent: Saturday, June 6, 2015 12:57 PM
>To: Wang, Arron
>Cc: [email protected]
>Subject: Re: [PATCH 2/2] Bluetooth: Add option to enable/disable A2MP module
>
>Hi Arron,
>
>>>> Make Bluetooth 3.0 HS feature configurable
>>>>
>>>> Signed-off-by: Arron Wang <[email protected]>
>>>> ---
>>>> net/bluetooth/Kconfig | 5 +
>>>> net/bluetooth/Makefile | 3 +-
>>>> net/bluetooth/a2mp.h | 19 +++
>>>> net/bluetooth/amp.h | 11 ++
>>>> net/bluetooth/hci_event.c | 260 +-----------------------------------
>>>> net/bluetooth/hci_event_a2mp.c | 283
>>> ++++++++++++++++++++++++++++++++++++++++
>>>> net/bluetooth/hci_event_a2mp.h | 91 +++++++++++++
>>>> 7 files changed, 412 insertions(+), 260 deletions(-) create mode
>>>> 100644 net/bluetooth/hci_event_a2mp.c create mode 100644
>>>> net/bluetooth/hci_event_a2mp.h
>>>
>>> I don’t think this is the solution here. I think A2MP support should
>>> be self contained and utilises the synchronous HCI command framework
>>> we have in place and also use in mgmt.
>>
>> Yes, create a separate file for hci a2mp event maybe not suitable, but there are
>many hci ops/events for different Bluetooth controller BREDR/AMP/LE, add the
>macro to separate them in one file may not easy to maintain, can we move these
>AMP releated hci ops/event function to file amp.c?
>
>unless it has some complicated state machine impact, using the hci_request
>infrastructure should be preferred compared to go through callback handlers in
>hci_event.c. So first of all it needs to be investigated which of the A2MP HCI
>functions can be turned into using hci_request.

I found the current A2MP functions already use hci_request send command to hci subsystem, in hci_event.c they just invoke these functions, we can define these functions as inline but I not sure whether we also should put A2MP related events under BT_HS config option.

Thanks
Arron

Attachments:

smime.p7s (7.40 kB)

2015-06-06 04:57:00

by Marcel Holtmann

[permalink] [raw]

Subject: Re: [PATCH 2/2] Bluetooth: Add option to enable/disable A2MP module

Hi Arron,

>>> Make Bluetooth 3.0 HS feature configurable
>>>
>>> Signed-off-by: Arron Wang <[email protected]>
>>> ---
>>> net/bluetooth/Kconfig | 5 +
>>> net/bluetooth/Makefile | 3 +-
>>> net/bluetooth/a2mp.h | 19 +++
>>> net/bluetooth/amp.h | 11 ++
>>> net/bluetooth/hci_event.c | 260 +-----------------------------------
>>> net/bluetooth/hci_event_a2mp.c | 283
>> ++++++++++++++++++++++++++++++++++++++++
>>> net/bluetooth/hci_event_a2mp.h | 91 +++++++++++++
>>> 7 files changed, 412 insertions(+), 260 deletions(-) create mode
>>> 100644 net/bluetooth/hci_event_a2mp.c create mode 100644
>>> net/bluetooth/hci_event_a2mp.h
>>
>> I don’t think this is the solution here. I think A2MP support should be self
>> contained and utilises the synchronous HCI command framework we have in place
>> and also use in mgmt.
>
> Yes, create a separate file for hci a2mp event maybe not suitable, but there are many hci ops/events for different Bluetooth controller BREDR/AMP/LE, add the macro to separate them in one file may not easy to maintain, can we move these AMP releated hci ops/event function to file amp.c?

unless it has some complicated state machine impact, using the hci_request infrastructure should be preferred compared to go through callback handlers in hci_event.c. So first of all it needs to be investigated which of the A2MP HCI functions can be turned into using hci_request.

Regards

Marcel

2015-06-03 09:22:48

by Arron Wang

[permalink] [raw]

Subject: RE: [PATCH 2/2] Bluetooth: Add option to enable/disable A2MP module

Attachments:

smime.p7s (7.40 kB)

2015-06-03 09:21:54

by Arron Wang

[permalink] [raw]

Subject: RE: [PATCH 1/2] Bluetooth: Add option to enable/disable SCO support

Hi Marcel,

>-----Original Message-----
>From: [email protected]
>[mailto:[email protected]] On Behalf Of Marcel Holtmann
>Sent: Tuesday, May 26, 2015 3:06 AM
>To: Wang, Arron
>Cc: [email protected]
>Subject: Re: [PATCH 1/2] Bluetooth: Add option to enable/disable SCO support
>
>Hi Arron,
>
>> Embedded device may need flexible option to reduce the code size and
>> memory use
>>
>> Signed-off-by: Arron Wang <[email protected]>
>> ---
>> include/net/bluetooth/bluetooth.h | 11 +++++++++++
>> include/net/bluetooth/hci_core.h | 13 +++++++++++++
>> net/bluetooth/Kconfig | 10 +++++++++-
>> net/bluetooth/Makefile | 3 ++-
>> 4 files changed, 35 insertions(+), 2 deletions(-)
>>
>> diff --git a/include/net/bluetooth/bluetooth.h
>> b/include/net/bluetooth/bluetooth.h
>> index 7dba805..f085ff14 100644
>> --- a/include/net/bluetooth/bluetooth.h
>> +++ b/include/net/bluetooth/bluetooth.h
>> @@ -365,8 +365,19 @@ extern struct dentry *bt_debugfs; int
>> l2cap_init(void); void l2cap_exit(void);
>>
>> +#if IS_ENABLED(CONFIG_BT_SCO)
>> int sco_init(void);
>> void sco_exit(void);
>> +#else
>> +static inline int sco_init(void)
>> +{
>> + return 0;
>> +}
>> +
>> +static inline void sco_exit(void)
>> +{
>> +}
>> +#endif
>>
>> int mgmt_init(void);
>> void mgmt_exit(void);
>> diff --git a/include/net/bluetooth/hci_core.h
>> b/include/net/bluetooth/hci_core.h
>> index a056c2b..7c70034 100644
>> --- a/include/net/bluetooth/hci_core.h
>> +++ b/include/net/bluetooth/hci_core.h
>> @@ -532,8 +532,21 @@ int l2cap_connect_ind(struct hci_dev *hdev,
>> bdaddr_t *bdaddr); int l2cap_disconn_ind(struct hci_conn *hcon); int
>> l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16
>> flags);
>>
>> +#if IS_ENABLED(CONFIG_BT_SCO)
>> int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8
>> *flags); int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff
>> *skb);
>> +#else
>> +static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
>> + __u8 *flags)
>> +{
>> + return 0;
>> +}
>
>shouldn’t this return an error?

This function returns link mode value, default zero indicate no link mode is chose and lead to hci reject the connection.

>> +
>> +static inline int sco_recv_scodata(struct hci_conn *hcon, struct
>> +sk_buff *skb) {
>> + return 0;
>
>I wonder now why this is returning anything at all. Should we maybe make this
>void in the first place?

Yes, my function just follow with the definition, I'll change them to return void.

>> +}
>> +#endif
>>
>> /* ----- Inquiry cache ----- */
>> #define INQUIRY_CACHE_AGE_MAX (HZ*30) /* 30 seconds */
>> diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig index
>> b8c794b..e7bca37 100644
>> --- a/net/bluetooth/Kconfig
>> +++ b/net/bluetooth/Kconfig
>> @@ -23,10 +23,10 @@ menuconfig BT
>> Linux Bluetooth subsystem consist of several layers:
>> Bluetooth Core
>> HCI device and connection manager, scheduler
>> - SCO audio links
>> L2CAP (Logical Link Control and Adaptation Protocol)
>> SMP (Security Manager Protocol) on LE (Low Energy) links
>> HCI Device drivers (Interface to the hardware)
>> + SCO Module (SCO audio links)
>> RFCOMM Module (RFCOMM Protocol)
>> BNEP Module (Bluetooth Network Encapsulation Protocol)
>> CMTP Module (CAPI Message Transport Protocol) @@ -45,6 +45,14 @@
>> config BT_BREDR
>> depends on BT
>> default y
>>
>> +config BT_SCO
>> + bool "Bluetooth SCO support"
>> + depends on BT_BREDR
>> + default y
>> + help
>> + SCO link provides voice transport over Bluetooth. SCO support is
>> + required for voice applications like Headset and Audio.
>> +
>
>This can be all hidden behind the BT_BREDR config option. No need to create
>another one. BR/EDR without SCO/eSCO support is a pretty useless offer. And if
>you do BR/EDR, then the little extra SCO socket handling is not big overhead.

Yes, I'll change them under BT_BREDR config option

>> source "net/bluetooth/rfcomm/Kconfig"
>>
>> source "net/bluetooth/bnep/Kconfig"
>> diff --git a/net/bluetooth/Makefile b/net/bluetooth/Makefile index
>> 9a8ea23..21fe57a 100644
>> --- a/net/bluetooth/Makefile
>> +++ b/net/bluetooth/Makefile
>> @@ -12,9 +12,10 @@ obj-$(CONFIG_BT_6LOWPAN) += bluetooth_6lowpan.o
>> bluetooth_6lowpan-y := 6lowpan.o
>>
>> bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o mgmt.o \
>> - hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o sco.o lib.o \
>> + hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o lib.o \
>> a2mp.o amp.o ecc.o hci_request.o mgmt_util.o
>>
>> +bluetooth-$(CONFIG_BT_SCO) += sco.o
>> bluetooth-$(CONFIG_BT_DEBUGFS) += hci_debugfs.o
>> bluetooth-$(CONFIG_BT_SELFTEST) += selftest.o
>
>Regards
>
>Marcel
>

Thanks
Arron

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