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* [PATCH v2] Bluetooth: btintel_pcie: Introduce HCI Driver protocol
@ 2025-11-07  5:40 Chethan T N
  2025-11-07  6:02 ` [v2] " bluez.test.bot
  2025-11-19 15:00 ` [PATCH v2] " patchwork-bot+bluetooth
  0 siblings, 2 replies; 3+ messages in thread
From: Chethan T N @ 2025-11-07  5:40 UTC (permalink / raw)
  To: linux-bluetooth
  Cc: ravishankar.srivatsa, chandrashekar.devegowda, kiran.k,
	Chethan T N

This patch adds the infrastructure that allow the user space program to
talk to intel pcie driver directly for fetching basic driver details.

The changes introduced are referred form
commit 04425292a62c15 ("Bluetooth: Introduce HCI Driver protocol")

Signed-off-by: Chethan T N <chethan.tumkur.narayan@intel.com>
---
 drivers/bluetooth/btintel_pcie.c | 59 ++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)

diff --git a/drivers/bluetooth/btintel_pcie.c b/drivers/bluetooth/btintel_pcie.c
index b0ad3c759ef5..2936b535479f 100644
--- a/drivers/bluetooth/btintel_pcie.c
+++ b/drivers/bluetooth/btintel_pcie.c
@@ -19,6 +19,7 @@
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/hci_drv.h>
 
 #include "btintel.h"
 #include "btintel_pcie.h"
@@ -2360,6 +2361,63 @@ static bool btintel_pcie_wakeup(struct hci_dev *hdev)
 	return device_may_wakeup(&data->pdev->dev);
 }
 
+static const struct {
+	u16 opcode;
+	const char *desc;
+} btintel_pcie_hci_drv_supported_commands[] = {
+	/* Common commands */
+	{ HCI_DRV_OP_READ_INFO, "Read Info" },
+};
+
+static int btintel_pcie_hci_drv_read_info(struct hci_dev *hdev, void *data,
+					  u16 data_len)
+{
+	struct hci_drv_rp_read_info *rp;
+	size_t rp_size;
+	int err, i;
+	u16 opcode, num_supported_commands =
+		ARRAY_SIZE(btintel_pcie_hci_drv_supported_commands);
+
+	rp_size = sizeof(*rp) + num_supported_commands * 2;
+
+	rp = kmalloc(rp_size, GFP_KERNEL);
+	if (!rp)
+		return -ENOMEM;
+
+	strscpy_pad(rp->driver_name, KBUILD_MODNAME);
+
+	rp->num_supported_commands = cpu_to_le16(num_supported_commands);
+	for (i = 0; i < num_supported_commands; i++) {
+		opcode = btintel_pcie_hci_drv_supported_commands[i].opcode;
+		bt_dev_dbg(hdev,
+			    "Supported HCI Drv command (0x%02x|0x%04x): %s",
+			    hci_opcode_ogf(opcode),
+			    hci_opcode_ocf(opcode),
+			    btintel_pcie_hci_drv_supported_commands[i].desc);
+		rp->supported_commands[i] = cpu_to_le16(opcode);
+	}
+
+	err = hci_drv_cmd_complete(hdev, HCI_DRV_OP_READ_INFO,
+				   HCI_DRV_STATUS_SUCCESS,
+				   rp, rp_size);
+
+	kfree(rp);
+	return err;
+}
+
+static const struct hci_drv_handler btintel_pcie_hci_drv_common_handlers[] = {
+	{ btintel_pcie_hci_drv_read_info,       HCI_DRV_READ_INFO_SIZE },
+};
+
+static const struct hci_drv_handler btintel_pcie_hci_drv_specific_handlers[] = {};
+
+static struct hci_drv btintel_pcie_hci_drv = {
+	.common_handler_count   = ARRAY_SIZE(btintel_pcie_hci_drv_common_handlers),
+	.common_handlers        = btintel_pcie_hci_drv_common_handlers,
+	.specific_handler_count = ARRAY_SIZE(btintel_pcie_hci_drv_specific_handlers),
+	.specific_handlers      = btintel_pcie_hci_drv_specific_handlers,
+};
+
 static int btintel_pcie_setup_hdev(struct btintel_pcie_data *data)
 {
 	int err;
@@ -2386,6 +2444,7 @@ static int btintel_pcie_setup_hdev(struct btintel_pcie_data *data)
 	hdev->set_bdaddr = btintel_set_bdaddr;
 	hdev->reset = btintel_pcie_reset;
 	hdev->wakeup = btintel_pcie_wakeup;
+	hdev->hci_drv = &btintel_pcie_hci_drv;
 
 	err = hci_register_dev(hdev);
 	if (err < 0) {
-- 
2.34.1


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2025-11-07  5:40 [PATCH v2] Bluetooth: btintel_pcie: Introduce HCI Driver protocol Chethan T N
2025-11-07  6:02 ` [v2] " bluez.test.bot
2025-11-19 15:00 ` [PATCH v2] " patchwork-bot+bluetooth

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