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Miller" , Jakub Kicinski , Johan Hedberg , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH v9 4/5] Bluetooth: Support the quality report events Date: Sun, 15 Aug 2021 20:17:16 +0800 Message-Id: <20210815201611.v9.4.I20c79eef4f36c4a3802e1068e59ec4a9f4ded940@changeid> X-Mailer: git-send-email 2.33.0.rc1.237.g0d66db33f3-goog In-Reply-To: <20210815201611.v9.1.I41aec59e65ffd3226d368dabeb084af13cc133c8@changeid> References: <20210815201611.v9.1.I41aec59e65ffd3226d368dabeb084af13cc133c8@changeid> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org 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 Signed-off-by: Joseph Hwang --- (no changes since v8) Changes in v8: - Rebase on the previous patch about refactoring set_exp_feature with a feature table. A standalone set_quality_report_func is implemented instead of adding the logic into set_exp_feature. 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 | 113 ++++++++++++++++++++++++++++++- 3 files changed, 115 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, __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 42bd503da20d..2910488bcb3b 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); +} + #define EXP_FEAT(_uuid, _set_func) \ { \ .uuid = _uuid, \ @@ -4046,6 +4085,77 @@ static int set_rpa_resolution_func(struct sock *sk, struct hci_dev *hdev, return err; } +static int set_quality_report_func(struct sock *sk, struct hci_dev *hdev, + struct mgmt_cp_set_exp_feature *cp, + u16 data_len) +{ + struct mgmt_rp_set_exp_feature rp; + 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; +} + static const struct mgmt_exp_feature { const u8 *uuid; int (*set_func)(struct sock *sk, struct hci_dev *hdev, @@ -4056,6 +4166,7 @@ static const struct mgmt_exp_feature { EXP_FEAT(debug_uuid, set_debug_func), #endif EXP_FEAT(rpa_resolution_uuid, set_rpa_resolution_func), + EXP_FEAT(quality_report_uuid, set_quality_report_func), /* end with a null feature */ EXP_FEAT(NULL, NULL)