Bluetooth: AMP: Write remote AMP Assoc

When receiving HCI Command Status after HCI Create Physical Link
execute HCI Write Remote AMP Assoc command to AMP controller.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

diff --git a/include/net/bluetooth/amp.h b/include/net/bluetooth/amp.h
index cadb3d0..8f80329 100644 (file)
--- a/include/net/bluetooth/amp.h
+++ b/include/net/bluetooth/amp.h
@@ -39,5 +39,7 @@ void amp_read_loc_assoc_frag(struct hci_dev *hdev, u8 phy_handle);
 void amp_read_loc_assoc(struct hci_dev *hdev, struct amp_mgr *mgr);
 void amp_create_phylink(struct hci_dev *hdev, struct amp_mgr *mgr,
                        struct hci_conn *hcon);
+void amp_write_remote_assoc(struct hci_dev *hdev, u8 handle);
+void amp_write_rem_assoc_continue(struct hci_dev *hdev, u8 handle);
 
 #endif /* __AMP_H */

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 464eae3..ea1f934 100644 (file)
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -127,6 +127,8 @@ struct le_scan_params {
 struct amp_assoc {
        __u16   len;
        __u16   offset;
+       __u16   rem_len;
+       __u16   len_so_far;
        __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
 };
 

diff --git a/net/bluetooth/amp.c b/net/bluetooth/amp.c
index 657ec73..5895ad0 100644 (file)
--- a/net/bluetooth/amp.c
+++ b/net/bluetooth/amp.c
@@ -233,6 +233,86 @@ void amp_read_loc_assoc(struct hci_dev *hdev, struct amp_mgr *mgr)
        hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_ASSOC, sizeof(cp), &cp);
 }
 
+
+/* Write AMP Assoc data fragments, returns true with last fragment written*/
+static bool amp_write_rem_assoc_frag(struct hci_dev *hdev,
+                                    struct hci_conn *hcon)
+{
+       struct hci_cp_write_remote_amp_assoc *cp;
+       struct amp_mgr *mgr = hcon->amp_mgr;
+       struct amp_ctrl *ctrl;
+       u16 frag_len, len;
+
+       ctrl = amp_ctrl_lookup(mgr, hcon->remote_id);
+       if (!ctrl)
+               return false;
+
+       if (!ctrl->assoc_rem_len) {
+               BT_DBG("all fragments are written");
+               ctrl->assoc_rem_len = ctrl->assoc_len;
+               ctrl->assoc_len_so_far = 0;
+
+               amp_ctrl_put(ctrl);
+               return true;
+       }
+
+       frag_len = min_t(u16, 248, ctrl->assoc_rem_len);
+       len = frag_len + sizeof(*cp);
+
+       cp = kzalloc(len, GFP_KERNEL);
+       if (!cp) {
+               amp_ctrl_put(ctrl);
+               return false;
+       }
+
+       BT_DBG("hcon %p ctrl %p frag_len %u assoc_len %u rem_len %u",
+              hcon, ctrl, frag_len, ctrl->assoc_len, ctrl->assoc_rem_len);
+
+       cp->phy_handle = hcon->handle;
+       cp->len_so_far = cpu_to_le16(ctrl->assoc_len_so_far);
+       cp->rem_len = cpu_to_le16(ctrl->assoc_rem_len);
+       memcpy(cp->frag, ctrl->assoc, frag_len);
+
+       ctrl->assoc_len_so_far += frag_len;
+       ctrl->assoc_rem_len -= frag_len;
+
+       amp_ctrl_put(ctrl);
+
+       hci_send_cmd(hdev, HCI_OP_WRITE_REMOTE_AMP_ASSOC, len, cp);
+
+       kfree(cp);
+
+       return false;
+}
+
+void amp_write_rem_assoc_continue(struct hci_dev *hdev, u8 handle)
+{
+       struct hci_conn *hcon;
+
+       BT_DBG("%s phy handle 0x%2.2x", hdev->name, handle);
+
+       hcon = hci_conn_hash_lookup_handle(hdev, handle);
+       if (!hcon)
+               return;
+
+       amp_write_rem_assoc_frag(hdev, hcon);
+}
+
+void amp_write_remote_assoc(struct hci_dev *hdev, u8 handle)
+{
+       struct hci_conn *hcon;
+
+       BT_DBG("%s phy handle 0x%2.2x", hdev->name, handle);
+
+       hcon = hci_conn_hash_lookup_handle(hdev, handle);
+       if (!hcon)
+               return;
+
+       BT_DBG("%s phy handle 0x%2.2x hcon %p", hdev->name, handle, hcon);
+
+       amp_write_rem_assoc_frag(hdev, hcon);
+}
+
 void amp_create_phylink(struct hci_dev *hdev, struct amp_mgr *mgr,
                        struct hci_conn *hcon)
 {

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index bd06ef9..0b7ba1e 100644 (file)
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1215,6 +1215,20 @@ static void hci_cc_write_le_host_supported(struct hci_dev *hdev,
        hci_req_complete(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED, status);
 }
 
+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_cs_inquiry(struct hci_dev *hdev, __u8 status)
 {
        BT_DBG("%s status 0x%2.2x", hdev->name, status);
@@ -1700,7 +1714,18 @@ static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
 
 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);
+
+       if (status)
+               return;
+
+       cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_PHY_LINK);
+       if (!cp)
+               return;
+
+       amp_write_remote_assoc(hdev, cp->phy_handle);
 }
 
 static void hci_inquiry_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
@@ -2436,6 +2461,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
                hci_cc_write_le_host_supported(hdev, skb);
                break;
 
+       case HCI_OP_WRITE_REMOTE_AMP_ASSOC:
+               hci_cc_write_remote_amp_assoc(hdev, skb);
+               break;
+
        default:
                BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
                break;