Bluetooth: Add reading of all local feature pages

With the introduction of CSA4 there is now also a features page number 2
available. This patch increments the maximum supported page number to 2
and adds code for reading all available pages (as long as we have
support for them - indicated by HCI_MAX_PAGES).

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

3 files changed, 14 insertions, 1 deletions

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 26822967e29c..80d718a9b31f 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -134,7 +134,7 @@ struct amp_assoc {
         __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
 };
 
-#define HCI_MAX_PAGES   2
+#define HCI_MAX_PAGES   3
 
 #define NUM_REASSEMBLY 4
 struct hci_dev {
@@ -153,6 +153,7 @@ struct hci_dev {
         __u8            dev_class[3];
         __u8            major_class;
         __u8            minor_class;
+        __u8            max_page;
         __u8            features[HCI_MAX_PAGES][8];
         __u8            le_features[8];
         __u8            le_white_list_size;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 9570358adb77..e246d3782ac2 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -589,6 +589,7 @@ static void hci_set_le_support(struct hci_request *req)
 static void hci_init3_req(struct hci_request *req, unsigned long opt)
 {
         struct hci_dev *hdev = req->hdev;
+        u8 p;
 
         if (hdev->commands[5] & 0x10)
                 hci_setup_link_policy(req);
@@ -597,6 +598,15 @@ static void hci_init3_req(struct hci_request *req, unsigned long opt)
                 hci_set_le_support(req);
                 hci_update_ad(req);
         }
+
+        /* Read features beyond page 1 if available */
+        for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
+                struct hci_cp_read_local_ext_features cp;
+
+                cp.page = p;
+                hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
+                            sizeof(cp), &cp);
+        }
 }
 
 static int __hci_init(struct hci_dev *hdev)
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 8adc3915ece4..3b2c0e07b25b 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -544,6 +544,8 @@ static void hci_cc_read_local_ext_features(struct hci_dev *hdev,
         if (rp->status)
                 return;
 
+        hdev->max_page = rp->max_page;
+
         if (rp->page < HCI_MAX_PAGES)
                 memcpy(hdev->features[rp->page], rp->features, 8);
 }