| Message ID | 20210812171533.v7.4.I20c79eef4f36c4a3802e1068e59ec4a9f4ded940@changeid (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v7,1/4] Bluetooth: btusb: disable Intel link statistics telemetry events | expand |
Hi Joseph, On Thu, Aug 12, 2021 at 2:16 AM Joseph Hwang <josephsih@chromium.org> wrote: > > This patch allows a user space process to enable/disable the quality > report events dynamically through the set experimental feature mgmt > interface if CONFIG_BT_FEATURE_QUALITY_REPORT is enabled. > > Since the quality report feature needs to invoke the callback function > provided by the driver, i.e., hdev->set_quality_report, a valid > controller index is required. > > Reviewed-by: Miao-chen Chou <mcchou@chromium.org> > Signed-off-by: Joseph Hwang <josephsih@chromium.org> > --- > > Changes in v7: > - Rebase on Tedd's patches that moved functionality from btusb to > btintel. > > Changes in v5: > - Removed CONFIG_BT_FEATURE_QUALITY_REPORT since there was no > large size impact. > > include/net/bluetooth/hci.h | 1 + > include/net/bluetooth/hci_core.h | 2 + > net/bluetooth/mgmt.c | 110 ++++++++++++++++++++++++++++++- > 3 files changed, 112 insertions(+), 1 deletion(-) > > diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h > index b80415011dcd..bb6b7398f490 100644 > --- a/include/net/bluetooth/hci.h > +++ b/include/net/bluetooth/hci.h > @@ -330,6 +330,7 @@ enum { > HCI_ENABLE_LL_PRIVACY, > HCI_CMD_PENDING, > HCI_FORCE_NO_MITM, > + HCI_QUALITY_REPORT, Hmm, 3/4 actually makes use of HCI_QUALITY_REPORT so this should actually appear before it (3/4 4/4 should be swapped) otherwise we break the likes of bisect, I usually recommend using git rebase -i origin/master --exec make to check if each and every change build properly. > > __HCI_NUM_FLAGS, > }; > diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h > index a7d06d7da602..7e9ae36b2582 100644 > --- a/include/net/bluetooth/hci_core.h > +++ b/include/net/bluetooth/hci_core.h > @@ -606,6 +606,7 @@ struct hci_dev { > int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr); > void (*cmd_timeout)(struct hci_dev *hdev); > bool (*prevent_wake)(struct hci_dev *hdev); > + int (*set_quality_report)(struct hci_dev *hdev, bool enable); > }; > > #define HCI_PHY_HANDLE(handle) (handle & 0xff) > @@ -759,6 +760,7 @@ extern struct mutex hci_cb_list_lock; > hci_dev_clear_flag(hdev, HCI_LE_ADV); \ > hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);\ > hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ); \ > + hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT); \ > } while (0) > > /* ----- HCI interface to upper protocols ----- */ > diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c > index 1e21e014efd2..358250862720 100644 > --- a/net/bluetooth/mgmt.c > +++ b/net/bluetooth/mgmt.c > @@ -3791,6 +3791,12 @@ static const u8 debug_uuid[16] = { > }; > #endif > > +/* 330859bc-7506-492d-9370-9a6f0614037f */ > +static const u8 quality_report_uuid[16] = { > + 0x7f, 0x03, 0x14, 0x06, 0x6f, 0x9a, 0x70, 0x93, > + 0x2d, 0x49, 0x06, 0x75, 0xbc, 0x59, 0x08, 0x33, > +}; > + > /* 671b10b5-42c0-4696-9227-eb28d1b049d6 */ > static const u8 simult_central_periph_uuid[16] = { > 0xd6, 0x49, 0xb0, 0xd1, 0x28, 0xeb, 0x27, 0x92, > @@ -3806,7 +3812,7 @@ static const u8 rpa_resolution_uuid[16] = { > static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev, > void *data, u16 data_len) > { > - char buf[62]; /* Enough space for 3 features */ > + char buf[82]; /* Enough space for 4 features: 2 + 20 * 4 */ > struct mgmt_rp_read_exp_features_info *rp = (void *)buf; > u16 idx = 0; > u32 flags; > @@ -3850,6 +3856,24 @@ static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev, > idx++; > } > > + if (hdev) { > + if (hdev->set_quality_report) { > + /* BIT(0): indicating if set_quality_report is > + * supported by controller. > + */ > + flags = BIT(0); > + > + /* BIT(1): indicating if the feature is enabled. */ > + if (hci_dev_test_flag(hdev, HCI_QUALITY_REPORT)) > + flags |= BIT(1); > + } else { > + flags = 0; > + } > + memcpy(rp->features[idx].uuid, quality_report_uuid, 16); > + rp->features[idx].flags = cpu_to_le32(flags); > + idx++; > + } > + > rp->feature_count = cpu_to_le16(idx); > > /* After reading the experimental features information, enable > @@ -3892,6 +3916,21 @@ static int exp_debug_feature_changed(bool enabled, struct sock *skip) > } > #endif > > +static int exp_quality_report_feature_changed(bool enabled, struct sock *skip) > +{ > + struct mgmt_ev_exp_feature_changed ev; > + > + BT_INFO("enabled %d", enabled); > + > + memset(&ev, 0, sizeof(ev)); > + memcpy(ev.uuid, quality_report_uuid, 16); > + ev.flags = cpu_to_le32(enabled ? BIT(0) : 0); > + > + return mgmt_limited_event(MGMT_EV_EXP_FEATURE_CHANGED, NULL, > + &ev, sizeof(ev), > + HCI_MGMT_EXP_FEATURE_EVENTS, skip); > +} > + > static int set_exp_feature(struct sock *sk, struct hci_dev *hdev, > void *data, u16 data_len) > { > @@ -4038,6 +4077,75 @@ static int set_exp_feature(struct sock *sk, struct hci_dev *hdev, > return err; > } Perhaps it would be a good idea to have a function table e.g: struct mgmt_exp_feature { const char *uuid; int (func*)(...) } exp_features[] = { ... }; That way we don't have to add such changes directly into set_exp_feature just in the table and implement its callback. > + if (!memcmp(cp->uuid, quality_report_uuid, 16)) { > + bool val, changed; > + int err; > + > + /* Command requires to use a valid controller index */ > + if (!hdev) > + return mgmt_cmd_status(sk, MGMT_INDEX_NONE, > + MGMT_OP_SET_EXP_FEATURE, > + MGMT_STATUS_INVALID_INDEX); > + > + /* Parameters are limited to a single octet */ > + if (data_len != MGMT_SET_EXP_FEATURE_SIZE + 1) > + return mgmt_cmd_status(sk, hdev->id, > + MGMT_OP_SET_EXP_FEATURE, > + MGMT_STATUS_INVALID_PARAMS); > + > + /* Only boolean on/off is supported */ > + if (cp->param[0] != 0x00 && cp->param[0] != 0x01) > + return mgmt_cmd_status(sk, hdev->id, > + MGMT_OP_SET_EXP_FEATURE, > + MGMT_STATUS_INVALID_PARAMS); > + > + hci_req_sync_lock(hdev); > + > + val = !!cp->param[0]; > + changed = (val != hci_dev_test_flag(hdev, HCI_QUALITY_REPORT)); > + > + if (!hdev->set_quality_report) { > + BT_INFO("quality report not supported"); > + err = mgmt_cmd_status(sk, hdev->id, > + MGMT_OP_SET_EXP_FEATURE, > + MGMT_STATUS_NOT_SUPPORTED); > + goto unlock_quality_report; > + } > + > + if (changed) { > + err = hdev->set_quality_report(hdev, val); > + if (err) { > + BT_ERR("set_quality_report value %d err %d", > + val, err); > + err = mgmt_cmd_status(sk, hdev->id, > + MGMT_OP_SET_EXP_FEATURE, > + MGMT_STATUS_FAILED); > + goto unlock_quality_report; > + } > + if (val) > + hci_dev_set_flag(hdev, HCI_QUALITY_REPORT); > + else > + hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT); > + } > + > + BT_INFO("quality report enable %d changed %d", > + val, changed); > + > + memcpy(rp.uuid, quality_report_uuid, 16); > + rp.flags = cpu_to_le32(val ? BIT(0) : 0); > + hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS); > + err = mgmt_cmd_complete(sk, hdev->id, > + MGMT_OP_SET_EXP_FEATURE, 0, > + &rp, sizeof(rp)); > + > + if (changed) > + exp_quality_report_feature_changed(val, sk); > + > +unlock_quality_report: > + hci_req_sync_unlock(hdev); > + return err; > + } > + > return mgmt_cmd_status(sk, hdev ? hdev->id : MGMT_INDEX_NONE, > MGMT_OP_SET_EXP_FEATURE, > MGMT_STATUS_NOT_SUPPORTED); > -- > 2.32.0.605.g8dce9f2422-goog >
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index b80415011dcd..bb6b7398f490 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -330,6 +330,7 @@ enum { HCI_ENABLE_LL_PRIVACY, HCI_CMD_PENDING, HCI_FORCE_NO_MITM, + HCI_QUALITY_REPORT, __HCI_NUM_FLAGS, }; diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index a7d06d7da602..7e9ae36b2582 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -606,6 +606,7 @@ struct hci_dev { int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr); void (*cmd_timeout)(struct hci_dev *hdev); bool (*prevent_wake)(struct hci_dev *hdev); + int (*set_quality_report)(struct hci_dev *hdev, bool enable); }; #define HCI_PHY_HANDLE(handle) (handle & 0xff) @@ -759,6 +760,7 @@ extern struct mutex hci_cb_list_lock; hci_dev_clear_flag(hdev, HCI_LE_ADV); \ hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);\ hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ); \ + hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT); \ } while (0) /* ----- HCI interface to upper protocols ----- */ diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 1e21e014efd2..358250862720 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -3791,6 +3791,12 @@ static const u8 debug_uuid[16] = { }; #endif +/* 330859bc-7506-492d-9370-9a6f0614037f */ +static const u8 quality_report_uuid[16] = { + 0x7f, 0x03, 0x14, 0x06, 0x6f, 0x9a, 0x70, 0x93, + 0x2d, 0x49, 0x06, 0x75, 0xbc, 0x59, 0x08, 0x33, +}; + /* 671b10b5-42c0-4696-9227-eb28d1b049d6 */ static const u8 simult_central_periph_uuid[16] = { 0xd6, 0x49, 0xb0, 0xd1, 0x28, 0xeb, 0x27, 0x92, @@ -3806,7 +3812,7 @@ static const u8 rpa_resolution_uuid[16] = { static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev, void *data, u16 data_len) { - char buf[62]; /* Enough space for 3 features */ + char buf[82]; /* Enough space for 4 features: 2 + 20 * 4 */ struct mgmt_rp_read_exp_features_info *rp = (void *)buf; u16 idx = 0; u32 flags; @@ -3850,6 +3856,24 @@ static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev, idx++; } + if (hdev) { + if (hdev->set_quality_report) { + /* BIT(0): indicating if set_quality_report is + * supported by controller. + */ + flags = BIT(0); + + /* BIT(1): indicating if the feature is enabled. */ + if (hci_dev_test_flag(hdev, HCI_QUALITY_REPORT)) + flags |= BIT(1); + } else { + flags = 0; + } + memcpy(rp->features[idx].uuid, quality_report_uuid, 16); + rp->features[idx].flags = cpu_to_le32(flags); + idx++; + } + rp->feature_count = cpu_to_le16(idx); /* After reading the experimental features information, enable @@ -3892,6 +3916,21 @@ static int exp_debug_feature_changed(bool enabled, struct sock *skip) } #endif +static int exp_quality_report_feature_changed(bool enabled, struct sock *skip) +{ + struct mgmt_ev_exp_feature_changed ev; + + BT_INFO("enabled %d", enabled); + + memset(&ev, 0, sizeof(ev)); + memcpy(ev.uuid, quality_report_uuid, 16); + ev.flags = cpu_to_le32(enabled ? BIT(0) : 0); + + return mgmt_limited_event(MGMT_EV_EXP_FEATURE_CHANGED, NULL, + &ev, sizeof(ev), + HCI_MGMT_EXP_FEATURE_EVENTS, skip); +} + static int set_exp_feature(struct sock *sk, struct hci_dev *hdev, void *data, u16 data_len) { @@ -4038,6 +4077,75 @@ static int set_exp_feature(struct sock *sk, struct hci_dev *hdev, return err; } + if (!memcmp(cp->uuid, quality_report_uuid, 16)) { + bool val, changed; + int err; + + /* Command requires to use a valid controller index */ + if (!hdev) + return mgmt_cmd_status(sk, MGMT_INDEX_NONE, + MGMT_OP_SET_EXP_FEATURE, + MGMT_STATUS_INVALID_INDEX); + + /* Parameters are limited to a single octet */ + if (data_len != MGMT_SET_EXP_FEATURE_SIZE + 1) + return mgmt_cmd_status(sk, hdev->id, + MGMT_OP_SET_EXP_FEATURE, + MGMT_STATUS_INVALID_PARAMS); + + /* Only boolean on/off is supported */ + if (cp->param[0] != 0x00 && cp->param[0] != 0x01) + return mgmt_cmd_status(sk, hdev->id, + MGMT_OP_SET_EXP_FEATURE, + MGMT_STATUS_INVALID_PARAMS); + + hci_req_sync_lock(hdev); + + val = !!cp->param[0]; + changed = (val != hci_dev_test_flag(hdev, HCI_QUALITY_REPORT)); + + if (!hdev->set_quality_report) { + BT_INFO("quality report not supported"); + err = mgmt_cmd_status(sk, hdev->id, + MGMT_OP_SET_EXP_FEATURE, + MGMT_STATUS_NOT_SUPPORTED); + goto unlock_quality_report; + } + + if (changed) { + err = hdev->set_quality_report(hdev, val); + if (err) { + BT_ERR("set_quality_report value %d err %d", + val, err); + err = mgmt_cmd_status(sk, hdev->id, + MGMT_OP_SET_EXP_FEATURE, + MGMT_STATUS_FAILED); + goto unlock_quality_report; + } + if (val) + hci_dev_set_flag(hdev, HCI_QUALITY_REPORT); + else + hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT); + } + + BT_INFO("quality report enable %d changed %d", + val, changed); + + memcpy(rp.uuid, quality_report_uuid, 16); + rp.flags = cpu_to_le32(val ? BIT(0) : 0); + hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS); + err = mgmt_cmd_complete(sk, hdev->id, + MGMT_OP_SET_EXP_FEATURE, 0, + &rp, sizeof(rp)); + + if (changed) + exp_quality_report_feature_changed(val, sk); + +unlock_quality_report: + hci_req_sync_unlock(hdev); + return err; + } + return mgmt_cmd_status(sk, hdev ? hdev->id : MGMT_INDEX_NONE, MGMT_OP_SET_EXP_FEATURE, MGMT_STATUS_NOT_SUPPORTED);