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[35.243.177.252]) by smtp.gmail.com with ESMTPSA id s4sm976678vsc.11.2020.07.01.15.08.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Jul 2020 15:08:55 -0700 (PDT) From: Alain Michaud To: linux-bluetooth@vger.kernel.org Cc: Alain Michaud Subject: [PATCH v2] Bluetooth: le_supported_roles experimental feature Date: Wed, 1 Jul 2020 22:08:53 +0000 Message-Id: <20200701220853.421445-1-alainm@chromium.org> X-Mailer: git-send-email 2.27.0.212.ge8ba1cc988-goog MIME-Version: 1.0 Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org This patch adds an le_supported_roles features which allows a clients to determine if the controller is able to support peripheral and central connections separately and at the same time. Signed-off-by: Alain Michaud --- Changes in v2: - Slight change of design based on offline feedback net/bluetooth/mgmt.c | 36 +++++++++++++++++++++++++++++++++++- 1 file changed, 35 insertions(+), 1 deletion(-) diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 5e9b9728eeac..c13fcc21745f 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -3753,10 +3753,36 @@ static const u8 debug_uuid[16] = { }; #endif +/* 671b10b5-42c0-4696-9227-eb28d1b049d6 */ +static const u8 le_supported_roles[16] = { + 0xd6, 0x49, 0xb0, 0xd1, 0x28, 0xeb, 0x27, 0x92, + 0x96, 0x46, 0xc0, 0x42, 0xb5, 0x10, 0x1b, 0x67, +}; + +static u32 get_le_roles_flags(struct hci_dev *hdev) +{ + u32 flags = 0; + + /* Central connections supported */ + if (hdev->le_states[4] & 0x08) + flags |= BIT(0); + + /* Peripheral connections supported */ + if (hdev->le_states[4] & 0x40) + flags |= BIT(1); + + /* Simult central and peripheral connections supported */ + if (test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) && + (hdev->le_states[3] & 0x10)) + flags |= BIT(2); + + return flags; +} + static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev, void *data, u16 data_len) { - char buf[42]; + char buf[44]; struct mgmt_rp_read_exp_features_info *rp = (void *)buf; u16 idx = 0; @@ -3774,6 +3800,14 @@ static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev, } #endif + if (hdev) { + memcpy(rp->features[idx].uuid, le_supported_roles, + sizeof(le_supported_roles)); + + rp->features[idx].flags = cpu_to_le32(get_le_roles_flags(hdev)); + ++idx; + } + rp->feature_count = cpu_to_le16(idx); /* After reading the experimental features information, enable