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gbmc/linux/4a8bdffce502d70405391a7ac38bac6dcef94749/./drivers/bluetooth/btintel_pcie.c
blob: ac71934007699bcefcea09fd59de95fdeb657177 [file]
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Bluetooth support for Intel PCIe devices
*
* Copyright (C) 2024 Intel Corporation
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/firmware.h>
#include <linux/overflow.h>
#include <linux/pci.h>
#include <linux/string.h>
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/acpi.h>
#include <linux/unaligned.h>
#include <linux/devcoredump.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include <net/bluetooth/hci_drv.h>
#include "btintel.h"
#include "btintel_pcie.h"
#define VERSION "0.1"
#define BTINTEL_PCI_DEVICE(dev, subdev) \
.vendor = PCI_VENDOR_ID_INTEL, \
.device = (dev), \
.subvendor = PCI_ANY_ID, \
.subdevice = (subdev), \
.driver_data = 0
#define POLL_INTERVAL_US 10
#define BTINTEL_PCIE_DMA_ALIGN_128B 128 /* 128 byte aligned */
/* Intel Bluetooth PCIe device id table */
static const struct pci_device_id btintel_pcie_table[] = {
/* BlazarI, Wildcat Lake */
{ BTINTEL_PCI_DEVICE(0x4D76, PCI_ANY_ID) },
/* BlazarI, Lunar Lake */
{ BTINTEL_PCI_DEVICE(0xA876, PCI_ANY_ID) },
/* Scorpious, Panther Lake-H484 */
{ BTINTEL_PCI_DEVICE(0xE376, PCI_ANY_ID) },
/* Scorpious, Panther Lake-H404 */
{ BTINTEL_PCI_DEVICE(0xE476, PCI_ANY_ID) },
/* Scorpious2, Nova Lake-PCD-H */
{ BTINTEL_PCI_DEVICE(0xD346, PCI_ANY_ID) },
/* Scorpious2, Nova Lake-PCD-S */
{ BTINTEL_PCI_DEVICE(0x6E74, PCI_ANY_ID) },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, btintel_pcie_table);
struct btintel_pcie_dev_recovery {
struct list_head list;
u8 count;
time64_t last_error;
char name[];
};
/* Intel PCIe uses 4 bytes of HCI type instead of 1 byte BT SIG HCI type */
#define BTINTEL_PCIE_HCI_TYPE_LEN 4
#define BTINTEL_PCIE_HCI_CMD_PKT 0x00000001
#define BTINTEL_PCIE_HCI_ACL_PKT 0x00000002
#define BTINTEL_PCIE_HCI_SCO_PKT 0x00000003
#define BTINTEL_PCIE_HCI_EVT_PKT 0x00000004
#define BTINTEL_PCIE_HCI_ISO_PKT 0x00000005
#define BTINTEL_PCIE_MAGIC_NUM 0xA5A5A5A5
#define BTINTEL_PCIE_BLZR_HWEXP_SIZE 1024
#define BTINTEL_PCIE_BLZR_HWEXP_DMP_ADDR 0xB00A7C00
#define BTINTEL_PCIE_SCP_HWEXP_SIZE 4096
#define BTINTEL_PCIE_SCP_HWEXP_DMP_ADDR 0xB030F800
#define BTINTEL_PCIE_SCP2_HWEXP_SIZE 4096
#define BTINTEL_PCIE_SCP2_HWEXP_DMP_ADDR 0xB031D000
#define BTINTEL_PCIE_MAGIC_NUM 0xA5A5A5A5
#define BTINTEL_PCIE_TRIGGER_REASON_USER_TRIGGER 0x17A2
#define BTINTEL_PCIE_TRIGGER_REASON_FW_ASSERT 0x1E61
#define BTINTEL_PCIE_RESET_WINDOW_SECS 5
#define BTINTEL_PCIE_FLR_MAX_RETRY 1
/* Alive interrupt context */
enum {
BTINTEL_PCIE_ROM,
BTINTEL_PCIE_FW_DL,
BTINTEL_PCIE_HCI_RESET,
BTINTEL_PCIE_INTEL_HCI_RESET1,
BTINTEL_PCIE_INTEL_HCI_RESET2,
BTINTEL_PCIE_D0,
BTINTEL_PCIE_D3
};
enum {
BTINTEL_PCIE_DSM_SET_RESET_TIMING = 1,
BTINTEL_PCIE_DSM_GET_RESET_TIMING = 2,
BTINTEL_PCIE_DSM_BT_PLDR_CONFIG = 3,
BTINTEL_PCIE_DSM_GET_RESET_TYPE = 4,
BTINTEL_PCIE_DSM_DYNAMIC_PLDR = 5,
BTINTEL_PCIE_DSM_GET_RESET_METHOD = 6,
BTINTEL_PCIE_DSM_SET_PLDR_DELAY = 7,
};
enum btintel_dsm_internal_product_reset_mode {
BTINTEL_PCIE_DSM_PLDR_MODE_EN_PROD_RESET = BIT(0),
BTINTEL_PCIE_DSM_PLDR_MODE_EN_WIFI_FLR = BIT(1),
BTINTEL_PCIE_DSM_PLDR_MODE_EN_BT_OFF_ON = BIT(2),
};
/* Structure for dbgc fragment buffer
* @buf_addr_lsb: LSB of the buffer's physical address
* @buf_addr_msb: MSB of the buffer's physical address
* @buf_size: Total size of the buffer
*/
struct btintel_pcie_dbgc_ctxt_buf {
u32 buf_addr_lsb;
u32 buf_addr_msb;
u32 buf_size;
};
/* Structure for dbgc fragment
* @magic_num: 0XA5A5A5A5
* @ver: For Driver-FW compatibility
* @total_size: Total size of the payload debug info
* @num_buf: Num of allocated debug bufs
* @bufs: All buffer's addresses and sizes
*/
struct btintel_pcie_dbgc_ctxt {
u32 magic_num;
u32 ver;
u32 total_size;
u32 num_buf;
struct btintel_pcie_dbgc_ctxt_buf bufs[BTINTEL_PCIE_DBGC_BUFFER_COUNT];
};
struct btintel_pcie_trigger_evt {
u8 type;
u8 len;
__le32 addr;
__le32 size;
} __packed;
struct btintel_pcie_fwtrigger_evt {
__le32 reserved;
u8 type; /* Debug Trigger event */
__le16 len;
u8 event_type;
__le16 event_id;
__le16 reserved2;
} __packed;
static LIST_HEAD(btintel_pcie_recovery_list);
static DEFINE_SPINLOCK(btintel_pcie_recovery_lock);
static inline char *btintel_pcie_alivectxt_state2str(u32 alive_intr_ctxt)
{
switch (alive_intr_ctxt) {
case BTINTEL_PCIE_ROM:
return "rom";
case BTINTEL_PCIE_FW_DL:
return "fw_dl";
case BTINTEL_PCIE_D0:
return "d0";
case BTINTEL_PCIE_D3:
return "d3";
case BTINTEL_PCIE_HCI_RESET:
return "hci_reset";
case BTINTEL_PCIE_INTEL_HCI_RESET1:
return "intel_reset1";
case BTINTEL_PCIE_INTEL_HCI_RESET2:
return "intel_reset2";
default:
return "unknown";
}
}
/* This function initializes the memory for DBGC buffers and formats the
* DBGC fragment which consists header info and DBGC buffer's LSB, MSB and
* size as the payload
*/
static int btintel_pcie_setup_dbgc(struct btintel_pcie_data *data)
{
struct btintel_pcie_dbgc_ctxt db_frag;
struct data_buf *buf;
int i;
data->dbgc.count = BTINTEL_PCIE_DBGC_BUFFER_COUNT;
data->dbgc.bufs = devm_kcalloc(&data->pdev->dev, data->dbgc.count,
sizeof(*buf), GFP_KERNEL);
if (!data->dbgc.bufs)
return -ENOMEM;
data->dbgc.buf_v_addr = dmam_alloc_coherent(&data->pdev->dev,
data->dbgc.count *
BTINTEL_PCIE_DBGC_BUFFER_SIZE,
&data->dbgc.buf_p_addr,
GFP_KERNEL | __GFP_NOWARN);
if (!data->dbgc.buf_v_addr)
return -ENOMEM;
data->dbgc.frag_v_addr = dmam_alloc_coherent(&data->pdev->dev,
sizeof(struct btintel_pcie_dbgc_ctxt),
&data->dbgc.frag_p_addr,
GFP_KERNEL | __GFP_NOWARN);
if (!data->dbgc.frag_v_addr)
return -ENOMEM;
data->dbgc.frag_size = sizeof(struct btintel_pcie_dbgc_ctxt);
db_frag.magic_num = BTINTEL_PCIE_MAGIC_NUM;
db_frag.ver = BTINTEL_PCIE_DBGC_FRAG_VERSION;
db_frag.total_size = BTINTEL_PCIE_DBGC_FRAG_PAYLOAD_SIZE;
db_frag.num_buf = BTINTEL_PCIE_DBGC_FRAG_BUFFER_COUNT;
for (i = 0; i < data->dbgc.count; i++) {
buf = &data->dbgc.bufs[i];
buf->data_p_addr = data->dbgc.buf_p_addr + i * BTINTEL_PCIE_DBGC_BUFFER_SIZE;
buf->data = data->dbgc.buf_v_addr + i * BTINTEL_PCIE_DBGC_BUFFER_SIZE;
db_frag.bufs[i].buf_addr_lsb = lower_32_bits(buf->data_p_addr);
db_frag.bufs[i].buf_addr_msb = upper_32_bits(buf->data_p_addr);
db_frag.bufs[i].buf_size = BTINTEL_PCIE_DBGC_BUFFER_SIZE;
}
memcpy(data->dbgc.frag_v_addr, &db_frag, sizeof(db_frag));
return 0;
}
static inline void ipc_print_ia_ring(struct hci_dev *hdev, struct ia *ia,
u16 queue_num)
{
bt_dev_dbg(hdev, "IA: %s: tr-h:%02u tr-t:%02u cr-h:%02u cr-t:%02u",
queue_num == BTINTEL_PCIE_TXQ_NUM ? "TXQ" : "RXQ",
ia->tr_hia[queue_num], ia->tr_tia[queue_num],
ia->cr_hia[queue_num], ia->cr_tia[queue_num]);
}
static inline void ipc_print_urbd1(struct hci_dev *hdev, struct urbd1 *urbd1,
u16 index)
{
bt_dev_dbg(hdev, "RXQ:urbd1(%u) frbd_tag:%u status: 0x%x fixed:0x%x",
index, urbd1->frbd_tag, urbd1->status, urbd1->fixed);
}
static struct btintel_pcie_data *btintel_pcie_get_data(struct msix_entry *entry)
{
u8 queue = entry->entry;
struct msix_entry *entries = entry - queue;
return container_of(entries, struct btintel_pcie_data, msix_entries[0]);
}
/* Set the doorbell for TXQ to notify the device that @index (actually index-1)
* of the TFD is updated and ready to transmit.
*/
static void btintel_pcie_set_tx_db(struct btintel_pcie_data *data, u16 index)
{
u32 val;
val = index;
val |= (BTINTEL_PCIE_TX_DB_VEC << 16);
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_HBUS_TARG_WRPTR, val);
}
/* Copy the data to next(@tfd_index) data buffer and update the TFD(transfer
* descriptor) with the data length and the DMA address of the data buffer.
*/
static void btintel_pcie_prepare_tx(struct txq *txq, u16 tfd_index,
struct sk_buff *skb)
{
struct data_buf *buf;
struct tfd *tfd;
tfd = &txq->tfds[tfd_index];
memset(tfd, 0, sizeof(*tfd));
buf = &txq->bufs[tfd_index];
tfd->size = skb->len;
tfd->addr = buf->data_p_addr;
/* Copy the outgoing data to DMA buffer */
memcpy(buf->data, skb->data, tfd->size);
}
static inline void btintel_pcie_dump_debug_registers(struct hci_dev *hdev)
{
struct btintel_pcie_data *data = hci_get_drvdata(hdev);
u16 cr_hia, cr_tia;
u32 reg, mbox_reg;
struct sk_buff *skb;
u8 buf[80];
skb = alloc_skb(1024, GFP_ATOMIC);
if (!skb)
return;
strscpy(buf, "---- Dump of debug registers ---");
bt_dev_dbg(hdev, "%s", buf);
skb_put_data(skb, buf, strlen(buf));
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_BOOT_STAGE_REG);
snprintf(buf, sizeof(buf), "boot stage: 0x%8.8x", reg);
bt_dev_dbg(hdev, "%s", buf);
skb_put_data(skb, buf, strlen(buf));
data->boot_stage_cache = reg;
if (reg & BTINTEL_PCIE_CSR_BOOT_STAGE_DEVICE_WARNING)
bt_dev_warn(hdev, "Controller device warning (boot_stage: 0x%8.8x)", reg);
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_IPC_STATUS_REG);
snprintf(buf, sizeof(buf), "ipc status: 0x%8.8x", reg);
skb_put_data(skb, buf, strlen(buf));
bt_dev_dbg(hdev, "%s", buf);
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_IPC_CONTROL_REG);
snprintf(buf, sizeof(buf), "ipc control: 0x%8.8x", reg);
skb_put_data(skb, buf, strlen(buf));
bt_dev_dbg(hdev, "%s", buf);
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_IPC_SLEEP_CTL_REG);
snprintf(buf, sizeof(buf), "ipc sleep control: 0x%8.8x", reg);
skb_put_data(skb, buf, strlen(buf));
bt_dev_dbg(hdev, "%s", buf);
/*Read the Mail box status and registers*/
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_MBOX_STATUS_REG);
snprintf(buf, sizeof(buf), "mbox status: 0x%8.8x", reg);
skb_put_data(skb, buf, strlen(buf));
if (reg & BTINTEL_PCIE_CSR_MBOX_STATUS_MBOX1) {
mbox_reg = btintel_pcie_rd_reg32(data,
BTINTEL_PCIE_CSR_MBOX_1_REG);
snprintf(buf, sizeof(buf), "mbox_1: 0x%8.8x", mbox_reg);
skb_put_data(skb, buf, strlen(buf));
bt_dev_dbg(hdev, "%s", buf);
}
if (reg & BTINTEL_PCIE_CSR_MBOX_STATUS_MBOX2) {
mbox_reg = btintel_pcie_rd_reg32(data,
BTINTEL_PCIE_CSR_MBOX_2_REG);
snprintf(buf, sizeof(buf), "mbox_2: 0x%8.8x", mbox_reg);
skb_put_data(skb, buf, strlen(buf));
bt_dev_dbg(hdev, "%s", buf);
}
if (reg & BTINTEL_PCIE_CSR_MBOX_STATUS_MBOX3) {
mbox_reg = btintel_pcie_rd_reg32(data,
BTINTEL_PCIE_CSR_MBOX_3_REG);
snprintf(buf, sizeof(buf), "mbox_3: 0x%8.8x", mbox_reg);
skb_put_data(skb, buf, strlen(buf));
bt_dev_dbg(hdev, "%s", buf);
}
if (reg & BTINTEL_PCIE_CSR_MBOX_STATUS_MBOX4) {
mbox_reg = btintel_pcie_rd_reg32(data,
BTINTEL_PCIE_CSR_MBOX_4_REG);
snprintf(buf, sizeof(buf), "mbox_4: 0x%8.8x", mbox_reg);
skb_put_data(skb, buf, strlen(buf));
bt_dev_dbg(hdev, "%s", buf);
}
cr_hia = data->ia.cr_hia[BTINTEL_PCIE_RXQ_NUM];
cr_tia = data->ia.cr_tia[BTINTEL_PCIE_RXQ_NUM];
snprintf(buf, sizeof(buf), "rxq: cr_tia: %u cr_hia: %u", cr_tia, cr_hia);
skb_put_data(skb, buf, strlen(buf));
bt_dev_dbg(hdev, "%s", buf);
cr_hia = data->ia.cr_hia[BTINTEL_PCIE_TXQ_NUM];
cr_tia = data->ia.cr_tia[BTINTEL_PCIE_TXQ_NUM];
snprintf(buf, sizeof(buf), "txq: cr_tia: %u cr_hia: %u", cr_tia, cr_hia);
skb_put_data(skb, buf, strlen(buf));
bt_dev_dbg(hdev, "%s", buf);
strscpy(buf, "--------------------------------");
bt_dev_dbg(hdev, "%s", buf);
hci_recv_diag(hdev, skb);
}
static int btintel_pcie_send_sync(struct btintel_pcie_data *data,
struct sk_buff *skb, u32 pkt_type, u16 opcode)
{
int ret;
u16 tfd_index;
u32 old_ctxt;
bool wait_on_alive = false;
struct hci_dev *hdev = data->hdev;
struct txq *txq = &data->txq;
tfd_index = data->ia.tr_hia[BTINTEL_PCIE_TXQ_NUM];
if (tfd_index >= txq->count)
return -ERANGE;
if (skb->len > BTINTEL_PCIE_BUFFER_SIZE - BTINTEL_PCIE_HCI_TYPE_LEN) {
bt_dev_err(hdev, "TX skb too large (%u > %u)", skb->len,
BTINTEL_PCIE_BUFFER_SIZE - BTINTEL_PCIE_HCI_TYPE_LEN);
return -EMSGSIZE;
}
/* Firmware raises alive interrupt on HCI_OP_RESET or
* BTINTEL_HCI_OP_RESET
*/
wait_on_alive = (pkt_type == BTINTEL_PCIE_HCI_CMD_PKT &&
(opcode == BTINTEL_HCI_OP_RESET || opcode == HCI_OP_RESET));
if (wait_on_alive) {
data->gp0_received = false;
old_ctxt = data->alive_intr_ctxt;
data->alive_intr_ctxt =
(opcode == BTINTEL_HCI_OP_RESET ? BTINTEL_PCIE_INTEL_HCI_RESET1 :
BTINTEL_PCIE_HCI_RESET);
bt_dev_dbg(data->hdev, "sending cmd: 0x%4.4x alive context changed: %s -> %s",
opcode, btintel_pcie_alivectxt_state2str(old_ctxt),
btintel_pcie_alivectxt_state2str(data->alive_intr_ctxt));
}
memcpy(skb_push(skb, BTINTEL_PCIE_HCI_TYPE_LEN), &pkt_type,
BTINTEL_PCIE_HCI_TYPE_LEN);
/* Prepare for TX. It updates the TFD with the length of data and
* address of the DMA buffer, and copy the data to the DMA buffer
*/
btintel_pcie_prepare_tx(txq, tfd_index, skb);
tfd_index = (tfd_index + 1) % txq->count;
data->ia.tr_hia[BTINTEL_PCIE_TXQ_NUM] = tfd_index;
/* Arm wait event condition */
data->tx_wait_done = false;
/* Set the doorbell to notify the device */
btintel_pcie_set_tx_db(data, tfd_index);
/* Wait for the complete interrupt - URBD0 */
ret = wait_event_timeout(data->tx_wait_q, data->tx_wait_done,
msecs_to_jiffies(BTINTEL_PCIE_TX_WAIT_TIMEOUT_MS));
if (!ret) {
bt_dev_err(data->hdev, "Timeout (%u ms) on tx completion",
BTINTEL_PCIE_TX_WAIT_TIMEOUT_MS);
btintel_pcie_dump_debug_registers(data->hdev);
return -ETIME;
}
if (wait_on_alive) {
ret = wait_event_timeout(data->gp0_wait_q,
data->gp0_received,
msecs_to_jiffies(BTINTEL_DEFAULT_INTR_TIMEOUT_MS));
if (!ret) {
hdev->stat.err_tx++;
bt_dev_err(hdev, "Timeout (%u ms) on alive interrupt, alive context: %s",
BTINTEL_DEFAULT_INTR_TIMEOUT_MS,
btintel_pcie_alivectxt_state2str(data->alive_intr_ctxt));
return -ETIME;
}
}
return 0;
}
/* Set the doorbell for RXQ to notify the device that @index (actually index-1)
* is available to receive the data
*/
static void btintel_pcie_set_rx_db(struct btintel_pcie_data *data, u16 index)
{
u32 val;
val = index;
val |= (BTINTEL_PCIE_RX_DB_VEC << 16);
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_HBUS_TARG_WRPTR, val);
}
/* Update the FRBD (free buffer descriptor) with the @frbd_index and the
* DMA address of the free buffer.
*/
static void btintel_pcie_prepare_rx(struct rxq *rxq, u16 frbd_index)
{
struct data_buf *buf;
struct frbd *frbd;
/* Get the buffer of the FRBD for DMA */
buf = &rxq->bufs[frbd_index];
frbd = &rxq->frbds[frbd_index];
memset(frbd, 0, sizeof(*frbd));
/* Update FRBD */
frbd->tag = frbd_index;
frbd->addr = buf->data_p_addr;
}
static int btintel_pcie_submit_rx(struct btintel_pcie_data *data)
{
u16 frbd_index;
struct rxq *rxq = &data->rxq;
frbd_index = data->ia.tr_hia[BTINTEL_PCIE_RXQ_NUM];
if (frbd_index >= rxq->count)
return -ERANGE;
/* Prepare for RX submit. It updates the FRBD with the address of DMA
* buffer
*/
btintel_pcie_prepare_rx(rxq, frbd_index);
frbd_index = (frbd_index + 1) % rxq->count;
data->ia.tr_hia[BTINTEL_PCIE_RXQ_NUM] = frbd_index;
ipc_print_ia_ring(data->hdev, &data->ia, BTINTEL_PCIE_RXQ_NUM);
/* Set the doorbell to notify the device */
btintel_pcie_set_rx_db(data, frbd_index);
return 0;
}
static int btintel_pcie_start_rx(struct btintel_pcie_data *data)
{
int i, ret;
struct rxq *rxq = &data->rxq;
/* Post (BTINTEL_PCIE_RX_DESCS_COUNT - 3) buffers to overcome the
* hardware issues leading to race condition at the firmware.
*/
for (i = 0; i < rxq->count - 3; i++) {
ret = btintel_pcie_submit_rx(data);
if (ret)
return ret;
}
return 0;
}
static void btintel_pcie_reset_ia(struct btintel_pcie_data *data)
{
memset(data->ia.tr_hia, 0, sizeof(u16) * BTINTEL_PCIE_NUM_QUEUES);
memset(data->ia.tr_tia, 0, sizeof(u16) * BTINTEL_PCIE_NUM_QUEUES);
memset(data->ia.cr_hia, 0, sizeof(u16) * BTINTEL_PCIE_NUM_QUEUES);
memset(data->ia.cr_tia, 0, sizeof(u16) * BTINTEL_PCIE_NUM_QUEUES);
}
static int btintel_pcie_reset_bt(struct btintel_pcie_data *data)
{
u32 reg;
int retry = 3;
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG);
reg &= ~(BTINTEL_PCIE_CSR_FUNC_CTRL_FUNC_ENA |
BTINTEL_PCIE_CSR_FUNC_CTRL_MAC_INIT |
BTINTEL_PCIE_CSR_FUNC_CTRL_FUNC_INIT);
reg |= BTINTEL_PCIE_CSR_FUNC_CTRL_BUS_MASTER_DISCON;
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG, reg);
do {
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG);
if (reg & BTINTEL_PCIE_CSR_FUNC_CTRL_BUS_MASTER_STS)
break;
usleep_range(10000, 12000);
} while (--retry > 0);
usleep_range(10000, 12000);
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG);
reg &= ~(BTINTEL_PCIE_CSR_FUNC_CTRL_FUNC_ENA |
BTINTEL_PCIE_CSR_FUNC_CTRL_MAC_INIT |
BTINTEL_PCIE_CSR_FUNC_CTRL_FUNC_INIT);
reg |= BTINTEL_PCIE_CSR_FUNC_CTRL_SW_RESET;
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG, reg);
usleep_range(10000, 12000);
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG);
bt_dev_dbg(data->hdev, "csr register after reset: 0x%8.8x", reg);
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_BOOT_STAGE_REG);
/* If shared hardware reset is success then boot stage register shall be
* set to 0
*/
return reg == 0 ? 0 : -ENODEV;
}
static void btintel_pcie_mac_init(struct btintel_pcie_data *data)
{
u32 reg;
/* Set MAC_INIT bit to start primary bootloader */
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG);
reg &= ~(BTINTEL_PCIE_CSR_FUNC_CTRL_FUNC_INIT |
BTINTEL_PCIE_CSR_FUNC_CTRL_BUS_MASTER_DISCON |
BTINTEL_PCIE_CSR_FUNC_CTRL_SW_RESET);
reg |= (BTINTEL_PCIE_CSR_FUNC_CTRL_FUNC_ENA |
BTINTEL_PCIE_CSR_FUNC_CTRL_MAC_INIT);
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG, reg);
}
static int btintel_pcie_get_mac_access(struct btintel_pcie_data *data)
{
u32 reg;
int retry = 15;
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG);
if (!(reg & BTINTEL_PCIE_CSR_FUNC_CTRL_MAC_ACCESS_REQ)) {
reg |= BTINTEL_PCIE_CSR_FUNC_CTRL_MAC_ACCESS_REQ;
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG, reg);
}
do {
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG);
if (reg & BTINTEL_PCIE_CSR_FUNC_CTRL_MAC_ACCESS_STS)
return 0;
/* Need delay here for Target Access harwdware to settle down*/
usleep_range(1000, 1200);
} while (--retry > 0);
return -ETIME;
}
static void btintel_pcie_release_mac_access(struct btintel_pcie_data *data)
{
u32 reg;
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG);
if (reg & BTINTEL_PCIE_CSR_FUNC_CTRL_MAC_ACCESS_REQ) {
reg &= ~BTINTEL_PCIE_CSR_FUNC_CTRL_MAC_ACCESS_REQ;
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG, reg);
}
}
static void *btintel_pcie_copy_tlv(void *dest, enum btintel_pcie_tlv_type type,
void *data, size_t size)
{
struct intel_tlv *tlv;
tlv = dest;
tlv->type = type;
tlv->len = size;
memcpy(tlv->val, data, tlv->len);
return dest + sizeof(*tlv) + size;
}
static int btintel_pcie_read_dram_buffers(struct btintel_pcie_data *data)
{
u32 offset, prev_size, wr_ptr_status, dump_size, data_len;
u32 status_reg, wrap_reg;
struct btintel_pcie_dbgc *dbgc = &data->dbgc;
struct hci_dev *hdev = data->hdev;
u8 *pdata, *p, buf_idx, hw_variant;
struct intel_tlv *tlv;
struct timespec64 now;
struct tm tm_now;
char fw_build[128];
char ts[128];
char vendor[64];
char driver[64];
if (!IS_ENABLED(CONFIG_DEV_COREDUMP))
return -EOPNOTSUPP;
hw_variant = INTEL_HW_VARIANT(data->cnvi);
switch (hw_variant) {
case BTINTEL_HWID_BZRI:
case BTINTEL_HWID_BZRIW:
status_reg = BTINTEL_PCIE_DBGC_CUR_DBGBUFF_STATUS;
wrap_reg = BTINTEL_PCIE_DBGC_DBGBUFF_WRAP_ARND;
break;
case BTINTEL_HWID_SCP:
case BTINTEL_HWID_SCP2:
case BTINTEL_HWID_SCP2F:
status_reg = BTINTEL_PCIE_DBGC_CUR_DBGBUFF_STATUS_SCP;
wrap_reg = BTINTEL_PCIE_DBGC_DBGBUFF_WRAP_ARND_SCP;
break;
default:
bt_dev_err(hdev, "Unsupported Intel hardware variant (0x%2.2x)",
hw_variant);
return -EINVAL;
}
wr_ptr_status = btintel_pcie_rd_dev_mem(data, status_reg);
data->dmp_hdr.wrap_ctr = btintel_pcie_rd_dev_mem(data, wrap_reg);
offset = wr_ptr_status & BTINTEL_PCIE_DBG_OFFSET_BIT_MASK;
buf_idx = BTINTEL_PCIE_DBGC_DBG_BUF_IDX(wr_ptr_status);
if (buf_idx > dbgc->count) {
bt_dev_warn(hdev, "Buffer index is invalid");
return -EINVAL;
}
prev_size = buf_idx * BTINTEL_PCIE_DBGC_BUFFER_SIZE;
if (prev_size + offset >= prev_size)
data->dmp_hdr.write_ptr = prev_size + offset;
else
return -EINVAL;
strscpy(vendor, "Vendor: Intel\n");
snprintf(driver, sizeof(driver), "Driver: %s\n",
data->dmp_hdr.driver_name);
ktime_get_real_ts64(&now);
time64_to_tm(now.tv_sec, 0, &tm_now);
snprintf(ts, sizeof(ts), "Dump Time: %02d-%02d-%04ld %02d:%02d:%02d",
tm_now.tm_mday, tm_now.tm_mon + 1, tm_now.tm_year + 1900,
tm_now.tm_hour, tm_now.tm_min, tm_now.tm_sec);
snprintf(fw_build, sizeof(fw_build),
"Firmware Timestamp: Year %u WW %02u buildtype %u build %u",
2000 + (data->dmp_hdr.fw_timestamp >> 8),
data->dmp_hdr.fw_timestamp & 0xff, data->dmp_hdr.fw_build_type,
data->dmp_hdr.fw_build_num);
data_len = sizeof(*tlv) + sizeof(data->dmp_hdr.cnvi_bt) +
sizeof(*tlv) + sizeof(data->dmp_hdr.write_ptr) +
sizeof(*tlv) + sizeof(data->dmp_hdr.wrap_ctr) +
sizeof(*tlv) + sizeof(data->dmp_hdr.trigger_reason) +
sizeof(*tlv) + sizeof(data->dmp_hdr.fw_git_sha1) +
sizeof(*tlv) + sizeof(data->dmp_hdr.cnvr_top) +
sizeof(*tlv) + sizeof(data->dmp_hdr.cnvi_top) +
sizeof(*tlv) + strlen(ts) +
sizeof(*tlv) + strlen(fw_build) +
sizeof(*tlv) + strlen(vendor) +
sizeof(*tlv) + strlen(driver);
if (data->dmp_hdr.event_type && data->dmp_hdr.event_id) {
data_len += sizeof(*tlv) + sizeof(data->dmp_hdr.event_type);
data_len += sizeof(*tlv) + sizeof(data->dmp_hdr.event_id);
}
/*
* sizeof(u32) - signature
* sizeof(data_len) - to store tlv data size
* data_len - TLV data
*/
dump_size = sizeof(u32) + sizeof(data_len) + data_len;
/* Add debug buffers data length to dump size */
dump_size += BTINTEL_PCIE_DBGC_BUFFER_SIZE * dbgc->count;
pdata = vmalloc(dump_size);
if (!pdata)
return -ENOMEM;
p = pdata;
*(u32 *)p = BTINTEL_PCIE_MAGIC_NUM;
p += sizeof(u32);
*(u32 *)p = data_len;
p += sizeof(u32);
p = btintel_pcie_copy_tlv(p, BTINTEL_VENDOR, vendor, strlen(vendor));
p = btintel_pcie_copy_tlv(p, BTINTEL_DRIVER, driver, strlen(driver));
p = btintel_pcie_copy_tlv(p, BTINTEL_DUMP_TIME, ts, strlen(ts));
p = btintel_pcie_copy_tlv(p, BTINTEL_FW_BUILD, fw_build,
strlen(fw_build));
p = btintel_pcie_copy_tlv(p, BTINTEL_CNVI_BT, &data->dmp_hdr.cnvi_bt,
sizeof(data->dmp_hdr.cnvi_bt));
p = btintel_pcie_copy_tlv(p, BTINTEL_WRITE_PTR, &data->dmp_hdr.write_ptr,
sizeof(data->dmp_hdr.write_ptr));
p = btintel_pcie_copy_tlv(p, BTINTEL_WRAP_CTR, &data->dmp_hdr.wrap_ctr,
sizeof(data->dmp_hdr.wrap_ctr));
p = btintel_pcie_copy_tlv(p, BTINTEL_TRIGGER_REASON, &data->dmp_hdr.trigger_reason,
sizeof(data->dmp_hdr.trigger_reason));
p = btintel_pcie_copy_tlv(p, BTINTEL_FW_SHA, &data->dmp_hdr.fw_git_sha1,
sizeof(data->dmp_hdr.fw_git_sha1));
p = btintel_pcie_copy_tlv(p, BTINTEL_CNVR_TOP, &data->dmp_hdr.cnvr_top,
sizeof(data->dmp_hdr.cnvr_top));
p = btintel_pcie_copy_tlv(p, BTINTEL_CNVI_TOP, &data->dmp_hdr.cnvi_top,
sizeof(data->dmp_hdr.cnvi_top));
if (data->dmp_hdr.event_type && data->dmp_hdr.event_id) {
p = btintel_pcie_copy_tlv(p, BTINTEL_EVENT_TYPE,
&data->dmp_hdr.event_type,
sizeof(data->dmp_hdr.event_type));
p = btintel_pcie_copy_tlv(p, BTINTEL_EVENT_ID,
&data->dmp_hdr.event_id,
sizeof(data->dmp_hdr.event_id));
data->dmp_hdr.event_type = 0;
data->dmp_hdr.event_id = 0;
}
memcpy(p, dbgc->bufs[0].data, dbgc->count * BTINTEL_PCIE_DBGC_BUFFER_SIZE);
dev_coredumpv(&hdev->dev, pdata, dump_size, GFP_KERNEL);
return 0;
}
static void btintel_pcie_dump_traces(struct hci_dev *hdev)
{
struct btintel_pcie_data *data = hci_get_drvdata(hdev);
int ret = 0;
ret = btintel_pcie_get_mac_access(data);
if (ret) {
bt_dev_err(hdev, "Failed to get mac access: (%d)", ret);
return;
}
ret = btintel_pcie_read_dram_buffers(data);
btintel_pcie_release_mac_access(data);
if (ret)
bt_dev_err(hdev, "Failed to dump traces: (%d)", ret);
}
static bool btintel_pcie_is_blazariw(struct pci_dev *pdev)
{
return pdev->device == 0x4D76;
}
/* This function enables BT function by setting BTINTEL_PCIE_CSR_FUNC_CTRL_MAC_INIT bit in
* BTINTEL_PCIE_CSR_FUNC_CTRL_REG register and wait for MSI-X with
* BTINTEL_PCIE_MSIX_HW_INT_CAUSES_GP0.
* Then the host reads firmware version from BTINTEL_CSR_F2D_MBX and the boot stage
* from BTINTEL_PCIE_CSR_BOOT_STAGE_REG.
*/
static int btintel_pcie_enable_bt(struct btintel_pcie_data *data)
{
int err;
u32 reg;
data->gp0_received = false;
/* Update the DMA address of CI struct to CSR */
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_CI_ADDR_LSB_REG,
data->ci_p_addr & 0xffffffff);
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_CI_ADDR_MSB_REG,
(u64)data->ci_p_addr >> 32);
/* On BlazarIW, the D0 entry to MAC init does not complete in
* time. Wait 50 ms (worst case as per HW analysis) for the
* shared hardware reset flow to complete before proceeding with
* MAC init.
*/
if (btintel_pcie_is_blazariw(data->pdev))
msleep(50);
/* Reset the cached value of boot stage. it is updated by the MSI-X
* gp0 interrupt handler.
*/
data->boot_stage_cache = 0x0;
/* Set MAC_INIT bit to start primary bootloader */
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG);
reg &= ~(BTINTEL_PCIE_CSR_FUNC_CTRL_FUNC_INIT |
BTINTEL_PCIE_CSR_FUNC_CTRL_BUS_MASTER_DISCON |
BTINTEL_PCIE_CSR_FUNC_CTRL_SW_RESET);
reg |= (BTINTEL_PCIE_CSR_FUNC_CTRL_FUNC_ENA |
BTINTEL_PCIE_CSR_FUNC_CTRL_MAC_INIT);
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG, reg);
/* MAC is ready. Enable BT FUNC */
btintel_pcie_set_reg_bits(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG,
BTINTEL_PCIE_CSR_FUNC_CTRL_FUNC_INIT);
btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG);
/* wait for interrupt from the device after booting up to primary
* bootloader.
*/
data->alive_intr_ctxt = BTINTEL_PCIE_ROM;
err = wait_event_timeout(data->gp0_wait_q, data->gp0_received,
msecs_to_jiffies(BTINTEL_DEFAULT_INTR_TIMEOUT_MS));
if (!err)
return -ETIME;
/* Check cached boot stage is BTINTEL_PCIE_CSR_BOOT_STAGE_ROM(BIT(0)) */
if (~data->boot_stage_cache & BTINTEL_PCIE_CSR_BOOT_STAGE_ROM)
return -ENODEV;
return 0;
}
static inline bool btintel_pcie_in_op(struct btintel_pcie_data *data)
{
return data->boot_stage_cache & BTINTEL_PCIE_CSR_BOOT_STAGE_OPFW;
}
static inline bool btintel_pcie_in_iml(struct btintel_pcie_data *data)
{
return data->boot_stage_cache & BTINTEL_PCIE_CSR_BOOT_STAGE_IML &&
!(data->boot_stage_cache & BTINTEL_PCIE_CSR_BOOT_STAGE_OPFW);
}
static inline bool btintel_pcie_in_d3(struct btintel_pcie_data *data)
{
return data->boot_stage_cache & BTINTEL_PCIE_CSR_BOOT_STAGE_D3_STATE_READY;
}
static inline bool btintel_pcie_in_d0(struct btintel_pcie_data *data)
{
return !(data->boot_stage_cache & BTINTEL_PCIE_CSR_BOOT_STAGE_D3_STATE_READY);
}
static inline bool btintel_pcie_in_device_halt(struct btintel_pcie_data *data)
{
return data->boot_stage_cache & BTINTEL_PCIE_CSR_BOOT_STAGE_DEVICE_HALTED;
}
static void btintel_pcie_wr_sleep_cntrl(struct btintel_pcie_data *data,
u32 dxstate)
{
bt_dev_dbg(data->hdev, "writing sleep_ctl_reg: 0x%8.8x", dxstate);
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_IPC_SLEEP_CTL_REG, dxstate);
}
static int btintel_pcie_read_device_mem(struct btintel_pcie_data *data,
void *buf, u32 dev_addr, int len)
{
int err;
u32 *val = buf;
/* Get device mac access */
err = btintel_pcie_get_mac_access(data);
if (err) {
bt_dev_err(data->hdev, "Failed to get mac access %d", err);
return err;
}
for (; len > 0; len -= 4, dev_addr += 4, val++)
*val = btintel_pcie_rd_dev_mem(data, dev_addr);
btintel_pcie_release_mac_access(data);
return 0;
}
static inline bool btintel_pcie_in_lockdown(struct btintel_pcie_data *data)
{
return (data->boot_stage_cache &
BTINTEL_PCIE_CSR_BOOT_STAGE_ROM_LOCKDOWN) ||
(data->boot_stage_cache &
BTINTEL_PCIE_CSR_BOOT_STAGE_IML_LOCKDOWN);
}
static inline bool btintel_pcie_in_error(struct btintel_pcie_data *data)
{
if (data->boot_stage_cache & BTINTEL_PCIE_CSR_BOOT_STAGE_DEVICE_WARNING)
bt_dev_warn(data->hdev, "Controller device warning (boot_stage: 0x%8.8x)",
data->boot_stage_cache);
return data->boot_stage_cache & BTINTEL_PCIE_CSR_BOOT_STAGE_ABORT_HANDLER;
}
static void btintel_pcie_msix_gp1_handler(struct btintel_pcie_data *data)
{
bt_dev_err(data->hdev, "Received gp1 mailbox interrupt");
btintel_pcie_dump_debug_registers(data->hdev);
}
/* This function handles the MSI-X interrupt for gp0 cause (bit 0 in
* BTINTEL_PCIE_CSR_MSIX_HW_INT_CAUSES) which is sent for boot stage and image response.
*/
static void btintel_pcie_msix_gp0_handler(struct btintel_pcie_data *data)
{
bool submit_rx, signal_waitq;
u32 reg, old_ctxt;
/* This interrupt is for three different causes and it is not easy to
* know what causes the interrupt. So, it compares each register value
* with cached value and update it before it wake up the queue.
*/
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_BOOT_STAGE_REG);
if (reg != data->boot_stage_cache)
data->boot_stage_cache = reg;
bt_dev_dbg(data->hdev, "Alive context: %s old_boot_stage: 0x%8.8x new_boot_stage: 0x%8.8x",
btintel_pcie_alivectxt_state2str(data->alive_intr_ctxt),
data->boot_stage_cache, reg);
reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_IMG_RESPONSE_REG);
if (reg != data->img_resp_cache)
data->img_resp_cache = reg;
if (btintel_pcie_in_error(data)) {
bt_dev_err(data->hdev, "Controller in error state (boot_stage: 0x%8.8x)",
data->boot_stage_cache);
btintel_pcie_dump_debug_registers(data->hdev);
return;
}
if (btintel_pcie_in_lockdown(data)) {
bt_dev_err(data->hdev, "Controller in lockdown state");
btintel_pcie_dump_debug_registers(data->hdev);
return;
}
data->gp0_received = true;
old_ctxt = data->alive_intr_ctxt;
submit_rx = false;
signal_waitq = false;
switch (data->alive_intr_ctxt) {
case BTINTEL_PCIE_ROM:
data->alive_intr_ctxt = BTINTEL_PCIE_FW_DL;
signal_waitq = true;
break;
case BTINTEL_PCIE_FW_DL:
/* Error case is already handled. Ideally control shall not
* reach here
*/
break;
case BTINTEL_PCIE_INTEL_HCI_RESET1:
if (btintel_pcie_in_op(data)) {
submit_rx = true;
signal_waitq = true;
break;
}
if (btintel_pcie_in_iml(data)) {
submit_rx = true;
signal_waitq = true;
data->alive_intr_ctxt = BTINTEL_PCIE_FW_DL;
break;
}
break;
case BTINTEL_PCIE_INTEL_HCI_RESET2:
if (btintel_test_and_clear_flag(data->hdev, INTEL_WAIT_FOR_D0)) {
btintel_wake_up_flag(data->hdev, INTEL_WAIT_FOR_D0);
data->alive_intr_ctxt = BTINTEL_PCIE_D0;
}
break;
case BTINTEL_PCIE_D0:
if (btintel_pcie_in_d3(data)) {
data->alive_intr_ctxt = BTINTEL_PCIE_D3;
signal_waitq = true;
break;
}
break;
case BTINTEL_PCIE_D3:
if (btintel_pcie_in_d0(data)) {
data->alive_intr_ctxt = BTINTEL_PCIE_D0;
submit_rx = true;
signal_waitq = true;
break;
}
break;
case BTINTEL_PCIE_HCI_RESET:
data->alive_intr_ctxt = BTINTEL_PCIE_D0;
submit_rx = true;
signal_waitq = true;
break;
default:
bt_dev_err(data->hdev, "Unknown state: 0x%2.2x",
data->alive_intr_ctxt);
break;
}
if (submit_rx) {
btintel_pcie_reset_ia(data);
btintel_pcie_start_rx(data);
}
if (signal_waitq) {
bt_dev_dbg(data->hdev, "wake up gp0 wait_q");
wake_up(&data->gp0_wait_q);
}
if (old_ctxt != data->alive_intr_ctxt)
bt_dev_dbg(data->hdev, "alive context changed: %s -> %s",
btintel_pcie_alivectxt_state2str(old_ctxt),
btintel_pcie_alivectxt_state2str(data->alive_intr_ctxt));
}
/* This function handles the MSX-X interrupt for rx queue 0 which is for TX
*/
static void btintel_pcie_msix_tx_handle(struct btintel_pcie_data *data)
{
u16 cr_tia, cr_hia;
struct txq *txq;
struct urbd0 *urbd0;
cr_tia = data->ia.cr_tia[BTINTEL_PCIE_TXQ_NUM];
cr_hia = data->ia.cr_hia[BTINTEL_PCIE_TXQ_NUM];
if (cr_tia == cr_hia)
return;
txq = &data->txq;
if (cr_hia >= txq->count) {
bt_dev_err(data->hdev, "TXQ: invalid cr_hia %u", cr_hia);
return;
}
while (cr_tia != cr_hia) {
data->tx_wait_done = true;
wake_up(&data->tx_wait_q);
urbd0 = &txq->urbd0s[cr_tia];
if (urbd0->tfd_index >= txq->count)
return;
cr_tia = (cr_tia + 1) % txq->count;
data->ia.cr_tia[BTINTEL_PCIE_TXQ_NUM] = cr_tia;
ipc_print_ia_ring(data->hdev, &data->ia, BTINTEL_PCIE_TXQ_NUM);
}
}
static int btintel_pcie_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_event_hdr *hdr = (void *)skb->data;
struct btintel_pcie_data *data = hci_get_drvdata(hdev);
if (skb->len > HCI_EVENT_HDR_SIZE && hdr->evt == 0xff &&
hdr->plen > 0) {
const void *ptr = skb->data + HCI_EVENT_HDR_SIZE + 1;
unsigned int len = skb->len - HCI_EVENT_HDR_SIZE - 1;
if (btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
switch (skb->data[2]) {
case 0x02:
/* When switching to the operational firmware
* the device sends a vendor specific event
* indicating that the bootup completed.
*/
btintel_bootup(hdev, ptr, len);
/* If bootup event is from operational image,
* driver needs to write sleep control register to
* move into D0 state
*/
if (btintel_pcie_in_op(data)) {
btintel_pcie_wr_sleep_cntrl(data, BTINTEL_PCIE_STATE_D0);
data->alive_intr_ctxt = BTINTEL_PCIE_INTEL_HCI_RESET2;
kfree_skb(skb);
return 0;
}
if (btintel_pcie_in_iml(data)) {
/* In case of IML, there is no concept
* of D0 transition. Just mimic as if
* IML moved to D0 by clearing INTEL_WAIT_FOR_D0
* bit and waking up the task waiting on
* INTEL_WAIT_FOR_D0. This is required
* as intel_boot() is common function for
* both IML and OP image loading.
*/
if (btintel_test_and_clear_flag(data->hdev,
INTEL_WAIT_FOR_D0))
btintel_wake_up_flag(data->hdev,
INTEL_WAIT_FOR_D0);
}
kfree_skb(skb);
return 0;
case 0x06:
/* When the firmware loading completes the
* device sends out a vendor specific event
* indicating the result of the firmware
* loading.
*/
btintel_secure_send_result(hdev, ptr, len);
kfree_skb(skb);
return 0;
}
}
/* This is a debug event that comes from IML and OP image when it
* starts execution. There is no need pass this event to stack.
*/
if (skb->data[2] == 0x97) {
hci_recv_diag(hdev, skb);
return 0;
}
}
return hci_recv_frame(hdev, skb);
}
/* Process the received rx data
* It check the frame header to identify the data type and create skb
* and calling HCI API
*/
static int btintel_pcie_recv_frame(struct btintel_pcie_data *data,
struct sk_buff *skb)
{
int ret;
u8 pkt_type;
u32 plen;
u32 pcie_pkt_type;
void *pdata;
struct hci_dev *hdev = data->hdev;
spin_lock(&data->hci_rx_lock);
/* The first 4 bytes indicates the Intel PCIe specific packet type */
pdata = skb_pull_data(skb, BTINTEL_PCIE_HCI_TYPE_LEN);
if (!pdata) {
bt_dev_err(hdev, "Corrupted packet received");
ret = -EILSEQ;
goto exit_error;
}
pcie_pkt_type = get_unaligned_le32(pdata);
switch (pcie_pkt_type) {
case BTINTEL_PCIE_HCI_ACL_PKT:
if (skb->len >= HCI_ACL_HDR_SIZE) {
plen = HCI_ACL_HDR_SIZE + __le16_to_cpu(hci_acl_hdr(skb)->dlen);
pkt_type = HCI_ACLDATA_PKT;
} else {
bt_dev_err(hdev, "ACL packet is too short");
ret = -EILSEQ;
goto exit_error;
}
break;
case BTINTEL_PCIE_HCI_SCO_PKT:
if (skb->len >= HCI_SCO_HDR_SIZE) {
plen = HCI_SCO_HDR_SIZE + hci_sco_hdr(skb)->dlen;
pkt_type = HCI_SCODATA_PKT;
} else {
bt_dev_err(hdev, "SCO packet is too short");
ret = -EILSEQ;
goto exit_error;
}
break;
case BTINTEL_PCIE_HCI_EVT_PKT:
if (skb->len >= HCI_EVENT_HDR_SIZE) {
plen = HCI_EVENT_HDR_SIZE + hci_event_hdr(skb)->plen;
pkt_type = HCI_EVENT_PKT;
} else {
bt_dev_err(hdev, "Event packet is too short");
ret = -EILSEQ;
goto exit_error;
}
break;
case BTINTEL_PCIE_HCI_ISO_PKT:
if (skb->len >= HCI_ISO_HDR_SIZE) {
plen = HCI_ISO_HDR_SIZE + __le16_to_cpu(hci_iso_hdr(skb)->dlen);
pkt_type = HCI_ISODATA_PKT;
} else {
bt_dev_err(hdev, "ISO packet is too short");
ret = -EILSEQ;
goto exit_error;
}
break;
default:
bt_dev_err(hdev, "Invalid packet type received: 0x%4.4x",
pcie_pkt_type);
ret = -EINVAL;
goto exit_error;
}
if (skb->len < plen) {
bt_dev_err(hdev, "Received corrupted packet. type: 0x%2.2x",
pkt_type);
ret = -EILSEQ;
goto exit_error;
}
bt_dev_dbg(hdev, "pkt_type: 0x%2.2x len: %u", pkt_type, plen);
hci_skb_pkt_type(skb) = pkt_type;
hdev->stat.byte_rx += plen;
skb_trim(skb, plen);
if (pcie_pkt_type == BTINTEL_PCIE_HCI_EVT_PKT)
ret = btintel_pcie_recv_event(hdev, skb);
else
ret = hci_recv_frame(hdev, skb);
skb = NULL; /* skb is freed in the callee */
exit_error:
kfree_skb(skb);
if (ret)
hdev->stat.err_rx++;
spin_unlock(&data->hci_rx_lock);
return ret;
}
static void btintel_pcie_read_hwexp(struct btintel_pcie_data *data)
{
int len, err, offset, pending;
struct sk_buff *skb;
u8 *buf, prefix[64];
u32 addr, val;
u16 pkt_len;
struct tlv {
u8 type;
__le16 len;
u8 val[];
} __packed;
struct tlv *tlv;
switch (data->dmp_hdr.cnvi_top & 0xfff) {
case BTINTEL_CNVI_BLAZARI:
case BTINTEL_CNVI_BLAZARIW:
/* only from step B0 onwards */
if (INTEL_CNVX_TOP_STEP(data->dmp_hdr.cnvi_top) != 0x01)
return;
len = BTINTEL_PCIE_BLZR_HWEXP_SIZE; /* exception data length */
addr = BTINTEL_PCIE_BLZR_HWEXP_DMP_ADDR;
break;
case BTINTEL_CNVI_SCP:
len = BTINTEL_PCIE_SCP_HWEXP_SIZE;
addr = BTINTEL_PCIE_SCP_HWEXP_DMP_ADDR;
break;
case BTINTEL_CNVI_SCP2:
case BTINTEL_CNVI_SCP2F:
len = BTINTEL_PCIE_SCP2_HWEXP_SIZE;
addr = BTINTEL_PCIE_SCP2_HWEXP_DMP_ADDR;
break;
default:
bt_dev_err(data->hdev, "Unsupported cnvi 0x%8.8x", data->dmp_hdr.cnvi_top);
return;
}
buf = kzalloc(len, GFP_KERNEL);
if (!buf)
goto exit_on_error;
btintel_pcie_mac_init(data);
err = btintel_pcie_read_device_mem(data, buf, addr, len);
if (err)
goto exit_on_error;
val = get_unaligned_le32(buf);
if (val != BTINTEL_PCIE_MAGIC_NUM) {
bt_dev_err(data->hdev, "Invalid exception dump signature: 0x%8.8x",
val);
goto exit_on_error;
}
snprintf(prefix, sizeof(prefix), "Bluetooth: %s: ", bt_dev_name(data->hdev));
offset = 4;
do {
pending = len - offset;
if (pending < sizeof(*tlv))
break;
tlv = (struct tlv *)(buf + offset);
/* If type == 0, then there are no more TLVs to be parsed */
if (!tlv->type) {
bt_dev_dbg(data->hdev, "Invalid TLV type 0");
break;
}
pkt_len = le16_to_cpu(tlv->len);
offset += sizeof(*tlv);
pending = len - offset;
if (pkt_len > pending)
break;
offset += pkt_len;
/* Only TLVs of type == 1 are HCI events, no need to process other
* TLVs
*/
if (tlv->type != 1)
continue;
bt_dev_dbg(data->hdev, "TLV packet length: %u", pkt_len);
if (pkt_len > HCI_MAX_EVENT_SIZE)
break;
skb = bt_skb_alloc(pkt_len, GFP_KERNEL);
if (!skb)
goto exit_on_error;
hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
skb_put_data(skb, tlv->val, pkt_len);
/* copy Intel specific pcie packet type */
val = BTINTEL_PCIE_HCI_EVT_PKT;
memcpy(skb_push(skb, BTINTEL_PCIE_HCI_TYPE_LEN), &val,
BTINTEL_PCIE_HCI_TYPE_LEN);
print_hex_dump(KERN_DEBUG, prefix, DUMP_PREFIX_OFFSET, 16, 1,
tlv->val, pkt_len, false);
btintel_pcie_recv_frame(data, skb);
} while (offset < len);
exit_on_error:
kfree(buf);
}
static int btintel_pcie_dump_fwtrigger_event(struct btintel_pcie_data *data)
{
struct btintel_pcie_fwtrigger_evt *evt;
struct sk_buff *skb;
unsigned int len;
int err;
u8 *buf;
if (!data->debug_evt_size || !data->debug_evt_addr)
return -EINVAL;
len = data->debug_evt_size;
len = ALIGN_DOWN(len, 4);
if (len < sizeof(*evt) || len > HCI_MAX_EVENT_SIZE) {
bt_dev_err(data->hdev, "Invalid FW trigger data size (%u bytes)", len);
return -EINVAL;
}
buf = kzalloc(len, GFP_KERNEL);
if (!buf)
return -ENOMEM;
btintel_pcie_mac_init(data);
err = btintel_pcie_read_device_mem(data, buf, data->debug_evt_addr,
len);
if (err)
goto exit_on_error;
evt = (void *)buf;
data->dmp_hdr.event_type = evt->event_type;
data->dmp_hdr.event_id = le16_to_cpu(evt->event_id);
bt_dev_dbg(data->hdev, "event type: 0x%2.2x event id: 0x%4.4x len: %u",
data->dmp_hdr.event_type, data->dmp_hdr.event_id, len);
skb = bt_skb_alloc(len, GFP_KERNEL);
if (!skb) {
err = -ENOMEM;
goto exit_on_error;
}
skb_put_data(skb, buf, len);
hci_recv_diag(data->hdev, skb);
err = 0;
exit_on_error:
kfree(buf);
return err;
}
/* Queue a coredump dump_traces() pass.
*
* Returns true if a new coredump was queued, false if one was already
* in-flight (the BTINTEL_PCIE_COREDUMP_INPROGRESS bit serves as the
* single-writer guard for the @coredump_work item) or the workqueue is
* disabled (reset / remove in progress).
*
* Always queue this AFTER any companion event-reader work (hwexp /
* fwtrigger) so that, on the ordered @dump_workqueue, the event reader
* runs first and populates dmp_hdr.event_type / event_id before
* dump_traces consumes them.
*/
static bool btintel_pcie_queue_coredump(struct btintel_pcie_data *data,
u16 trigger_reason)
{
if (test_and_set_bit(BTINTEL_PCIE_COREDUMP_INPROGRESS, &data->flags))
return false;
data->dmp_hdr.trigger_reason = trigger_reason;
if (queue_work(data->dump_workqueue, &data->coredump_work))
return true;
/* Workqueue is disabled (reset/remove drained it). Release the
* guard so a later trigger, after re-probe, can succeed.
*/
clear_bit(BTINTEL_PCIE_COREDUMP_INPROGRESS, &data->flags);
return false;
}
static void btintel_pcie_msix_fw_trigger_handler(struct btintel_pcie_data *data)
{
bt_dev_dbg(data->hdev, "Received firmware smart trigger cause");
/* Per-work guard: deduplicate concurrent FW-trigger interrupts.
* Cleared at the tail of btintel_pcie_fwtrigger_worker().
*/
if (test_and_set_bit(BTINTEL_PCIE_FWTRIGGER_DUMP_INPROGRESS,
&data->flags))
return;
if (!queue_work(data->dump_workqueue, &data->fwtrigger_work)) {
clear_bit(BTINTEL_PCIE_FWTRIGGER_DUMP_INPROGRESS, &data->flags);
return;
}
/* Queue coredump after the fwtrigger event reader so dmp_hdr.event_*
* is populated before dump_traces consumes it.
*/
btintel_pcie_queue_coredump(data, BTINTEL_PCIE_TRIGGER_REASON_FW_ASSERT);
}
static void btintel_pcie_msix_hw_exp_handler(struct btintel_pcie_data *data)
{
bt_dev_err(data->hdev, "Received hw exception interrupt");
/* CORE_HALTED is the single-writer guard for this handler. It is
* set once on first HW exception and cleared only by re-probe
* (data is reallocated), so it also serializes hwexp_work
* scheduling without needing a separate bit.
*/
if (test_and_set_bit(BTINTEL_PCIE_CORE_HALTED, &data->flags))
return;
/* Queue companion coredump first so it is appended after hwexp_work
* on the ordered @dump_workqueue (preserves the original
* coredump-then-hwexp ordering).
*/
btintel_pcie_queue_coredump(data, BTINTEL_PCIE_TRIGGER_REASON_FW_ASSERT);
queue_work(data->dump_workqueue, &data->hwexp_work);
}
static void btintel_pcie_coredump_worker(struct work_struct *work)
{
struct btintel_pcie_data *data = container_of(work,
struct btintel_pcie_data, coredump_work);
/* hdev is NULL until setup_hdev() succeeds, and is cleared on
* teardown after disable_work_sync() drains us; bail in that case.
*/
if (!data->hdev)
goto out;
btintel_pcie_dump_traces(data->hdev);
out:
/* Release guard last so a new trigger can run only after this
* pass has fully completed (including dev_coredumpv()).
*/
clear_bit(BTINTEL_PCIE_COREDUMP_INPROGRESS, &data->flags);
}
static void btintel_pcie_hwexp_worker(struct work_struct *work)
{
struct btintel_pcie_data *data = container_of(work,
struct btintel_pcie_data, hwexp_work);
if (!data->hdev)
return;
/* Unlike usb products, controller will not send hardware exception
* event on exception. Instead controller writes the hardware event
* to device memory along with optional debug events, raises MSIX
* and halts. Driver shall read the exception event from device
* memory and passes it to the stack for further processing.
*
* Re-entry is gated by BTINTEL_PCIE_CORE_HALTED in the IRQ
* handler, which is only cleared by re-probe; no per-work bit
* is needed here.
*/
btintel_pcie_read_hwexp(data);
}
static void btintel_pcie_fwtrigger_worker(struct work_struct *work)
{
struct btintel_pcie_data *data = container_of(work,
struct btintel_pcie_data, fwtrigger_work);
int err;
if (!data->hdev)
goto out;
err = btintel_pcie_dump_fwtrigger_event(data);
if (err)
bt_dev_warn(data->hdev, "failed to log fwtrigger event");
out:
/* Release guard last; matches set in fw_trigger handler. */
clear_bit(BTINTEL_PCIE_FWTRIGGER_DUMP_INPROGRESS, &data->flags);
}
static void btintel_pcie_rx_work(struct work_struct *work)
{
struct btintel_pcie_data *data = container_of(work,
struct btintel_pcie_data, rx_work);
struct sk_buff *skb;
/* Process the sk_buf in queue and send to the HCI layer */
while ((skb = skb_dequeue(&data->rx_skb_q))) {
btintel_pcie_recv_frame(data, skb);
}
}
/* create sk_buff with data and save it to queue and start RX work */
static int btintel_pcie_submit_rx_work(struct btintel_pcie_data *data, u8 status,
void *buf)
{
int ret, len;
struct rfh_hdr *rfh_hdr;
struct sk_buff *skb;
rfh_hdr = buf;
len = rfh_hdr->packet_len;
if (len == 0 || len > BTINTEL_PCIE_BUFFER_SIZE - sizeof(*rfh_hdr)) {
bt_dev_err(data->hdev, "Invalid packet_len %d (max %zu)", len,
BTINTEL_PCIE_BUFFER_SIZE - sizeof(*rfh_hdr));
ret = -EINVAL;
goto resubmit;
}
/* Remove RFH header */
buf += sizeof(*rfh_hdr);
skb = alloc_skb(len, GFP_ATOMIC);
if (!skb)
goto resubmit;
skb_put_data(skb, buf, len);
skb_queue_tail(&data->rx_skb_q, skb);
queue_work(data->workqueue, &data->rx_work);
resubmit:
ret = btintel_pcie_submit_rx(data);
return ret;
}
/* Handles the MSI-X interrupt for rx queue 1 which is for RX */
static void btintel_pcie_msix_rx_handle(struct btintel_pcie_data *data)
{
u16 cr_hia, cr_tia;
struct rxq *rxq;
struct urbd1 *urbd1;
struct data_buf *buf;
int ret;
struct hci_dev *hdev = data->hdev;
cr_hia = data->ia.cr_hia[BTINTEL_PCIE_RXQ_NUM];
cr_tia = data->ia.cr_tia[BTINTEL_PCIE_RXQ_NUM];
bt_dev_dbg(hdev, "RXQ: cr_hia: %u cr_tia: %u", cr_hia, cr_tia);
/* Check CR_TIA and CR_HIA for change */
if (cr_tia == cr_hia)
return;
rxq = &data->rxq;
if (cr_hia >= rxq->count) {
bt_dev_err(hdev, "RXQ: invalid cr_hia %u", cr_hia);
return;
}
/* The firmware sends multiple CD in a single MSI-X and it needs to
* process all received CDs in this interrupt.
*/
while (cr_tia != cr_hia) {
urbd1 = &rxq->urbd1s[cr_tia];
ipc_print_urbd1(data->hdev, urbd1, cr_tia);
if (urbd1->frbd_tag >= rxq->count) {
bt_dev_err(hdev, "RXQ: invalid frbd_tag %u",
urbd1->frbd_tag);
return;
}
buf = &rxq->bufs[urbd1->frbd_tag];
if (!buf) {
bt_dev_err(hdev, "RXQ: failed to get the DMA buffer for %d",
urbd1->frbd_tag);
return;
}
ret = btintel_pcie_submit_rx_work(data, urbd1->status,
buf->data);
if (ret) {
bt_dev_err(hdev, "RXQ: failed to submit rx request");
return;
}
cr_tia = (cr_tia + 1) % rxq->count;
data->ia.cr_tia[BTINTEL_PCIE_RXQ_NUM] = cr_tia;
ipc_print_ia_ring(data->hdev, &data->ia, BTINTEL_PCIE_RXQ_NUM);
}
}
static inline bool btintel_pcie_is_rxq_empty(struct btintel_pcie_data *data)
{
return data->ia.cr_hia[BTINTEL_PCIE_RXQ_NUM] == data->ia.cr_tia[BTINTEL_PCIE_RXQ_NUM];
}
static inline bool btintel_pcie_is_txackq_empty(struct btintel_pcie_data *data)
{
return data->ia.cr_tia[BTINTEL_PCIE_TXQ_NUM] == data->ia.cr_hia[BTINTEL_PCIE_TXQ_NUM];
}
static irqreturn_t btintel_pcie_irq_msix_handler(int irq, void *dev_id)
{
struct msix_entry *entry = dev_id;
struct btintel_pcie_data *data = btintel_pcie_get_data(entry);
u32 intr_fh, intr_hw;
spin_lock(&data->irq_lock);
intr_fh = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_MSIX_FH_INT_CAUSES);
intr_hw = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_MSIX_HW_INT_CAUSES);
/* Clear causes registers to avoid being handling the same cause */
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_MSIX_FH_INT_CAUSES, intr_fh);
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_MSIX_HW_INT_CAUSES, intr_hw);
spin_unlock(&data->irq_lock);
if (unlikely(!(intr_fh | intr_hw))) {
/* Ignore interrupt, inta == 0 */
bt_warn_ratelimited("Bluetooth: btintel_pcie: Received spurious interrupt\n");
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_MSIX_AUTOMASK_ST,
BIT(entry->entry));
return IRQ_NONE;
}
/* This interrupt is raised when there is an hardware exception */
if (intr_hw & BTINTEL_PCIE_MSIX_HW_INT_CAUSES_HWEXP)
btintel_pcie_msix_hw_exp_handler(data);
if (intr_hw & BTINTEL_PCIE_MSIX_HW_INT_CAUSES_GP1)
btintel_pcie_msix_gp1_handler(data);
/* For TX */
if (intr_fh & BTINTEL_PCIE_MSIX_FH_INT_CAUSES_0) {
btintel_pcie_msix_tx_handle(data);
if (!btintel_pcie_is_rxq_empty(data))
btintel_pcie_msix_rx_handle(data);
}
/* For RX */
if (intr_fh & BTINTEL_PCIE_MSIX_FH_INT_CAUSES_1) {
btintel_pcie_msix_rx_handle(data);
if (!btintel_pcie_is_txackq_empty(data))
btintel_pcie_msix_tx_handle(data);
}
if (intr_hw & BTINTEL_PCIE_MSIX_HW_INT_CAUSES_FWTRIG)
btintel_pcie_msix_fw_trigger_handler(data);
/* This interrupt is triggered by the firmware after updating
* boot_stage register and image_response register
*/
if (intr_hw & BTINTEL_PCIE_MSIX_HW_INT_CAUSES_GP0)
btintel_pcie_msix_gp0_handler(data);
/*
* Before sending the interrupt the HW disables it to prevent a nested
* interrupt. This is done by writing 1 to the corresponding bit in
* the mask register. After handling the interrupt, it should be
* re-enabled by clearing this bit. This register is defined as write 1
* clear (W1C) register, meaning that it's cleared by writing 1
* to the bit.
*/
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_MSIX_AUTOMASK_ST,
BIT(entry->entry));
return IRQ_HANDLED;
}
/* This function requests the irq for MSI-X and registers the handlers per irq.
* Currently, it requests only 1 irq for all interrupt causes.
*/
static int btintel_pcie_setup_irq(struct btintel_pcie_data *data)
{
int err;
int num_irqs, i, j;
for (i = 0; i < BTINTEL_PCIE_MSIX_VEC_MAX; i++)
data->msix_entries[i].entry = i;
num_irqs = pci_alloc_irq_vectors(data->pdev, BTINTEL_PCIE_MSIX_VEC_MIN,
BTINTEL_PCIE_MSIX_VEC_MAX, PCI_IRQ_MSIX);
if (num_irqs < 0)
return num_irqs;
data->alloc_vecs = num_irqs;
data->msix_enabled = 1;
data->def_irq = 0;
/* setup irq handler */
for (i = 0; i < data->alloc_vecs; i++) {
struct msix_entry *msix_entry;
msix_entry = &data->msix_entries[i];
msix_entry->vector = pci_irq_vector(data->pdev, i);
err = devm_request_threaded_irq(&data->pdev->dev,
msix_entry->vector,
NULL,
btintel_pcie_irq_msix_handler,
IRQF_ONESHOT | IRQF_SHARED,
KBUILD_MODNAME,
msix_entry);
if (err) {
for (j = 0; j < i; j++)
devm_free_irq(&data->pdev->dev,
data->msix_entries[j].vector,
&data->msix_entries[j]);
pci_free_irq_vectors(data->pdev);
data->alloc_vecs = 0;
return err;
}
}
return 0;
}
struct btintel_pcie_causes_list {
u32 cause;
u32 mask_reg;
u8 cause_num;
};
static struct btintel_pcie_causes_list causes_list[] = {
{ BTINTEL_PCIE_MSIX_FH_INT_CAUSES_0, BTINTEL_PCIE_CSR_MSIX_FH_INT_MASK, 0x00 },
{ BTINTEL_PCIE_MSIX_FH_INT_CAUSES_1, BTINTEL_PCIE_CSR_MSIX_FH_INT_MASK, 0x01 },
{ BTINTEL_PCIE_MSIX_HW_INT_CAUSES_GP0, BTINTEL_PCIE_CSR_MSIX_HW_INT_MASK, 0x20 },
{ BTINTEL_PCIE_MSIX_HW_INT_CAUSES_HWEXP, BTINTEL_PCIE_CSR_MSIX_HW_INT_MASK, 0x23 },
{ BTINTEL_PCIE_MSIX_HW_INT_CAUSES_FWTRIG, BTINTEL_PCIE_CSR_MSIX_HW_INT_MASK, 0x25 },
};
/* This function configures the interrupt masks for both HW_INT_CAUSES and
* FH_INT_CAUSES which are meaningful to us.
*
* After resetting BT function via PCIE FLR or FUNC_CTRL reset, the driver
* need to call this function again to configure since the masks
* are reset to 0xFFFFFFFF after reset.
*/
static void btintel_pcie_config_msix(struct btintel_pcie_data *data)
{
int i;
int val = data->def_irq | BTINTEL_PCIE_MSIX_NON_AUTO_CLEAR_CAUSE;
/* Set Non Auto Clear Cause */
for (i = 0; i < ARRAY_SIZE(causes_list); i++) {
btintel_pcie_wr_reg8(data,
BTINTEL_PCIE_CSR_MSIX_IVAR(causes_list[i].cause_num),
val);
btintel_pcie_clr_reg_bits(data,
causes_list[i].mask_reg,
causes_list[i].cause);
}
/* Save the initial interrupt mask */
data->fh_init_mask = ~btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_MSIX_FH_INT_MASK);
data->hw_init_mask = ~btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_MSIX_HW_INT_MASK);
}
static int btintel_pcie_config_pcie(struct pci_dev *pdev,
struct btintel_pcie_data *data)
{
int err;
err = pcim_enable_device(pdev);
if (err)
return err;
pci_set_master(pdev);
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (err) {
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err)
return err;
}
data->base_addr = pcim_iomap_region(pdev, 0, KBUILD_MODNAME);
if (IS_ERR(data->base_addr))
return PTR_ERR(data->base_addr);
/* Do shared hardware reset to ensure a clean start before
* configuring interrupts.
*/
err = btintel_pcie_reset_bt(data);
if (err)
return err;
err = btintel_pcie_setup_irq(data);
if (err)
return err;
/* Configure MSI-X with causes list */
btintel_pcie_config_msix(data);
return 0;
}
static void btintel_pcie_init_ci(struct btintel_pcie_data *data,
struct ctx_info *ci)
{
ci->version = 0x1;
ci->size = sizeof(*ci);
ci->config = 0x0000;
ci->addr_cr_hia = data->ia.cr_hia_p_addr;
ci->addr_tr_tia = data->ia.tr_tia_p_addr;
ci->addr_cr_tia = data->ia.cr_tia_p_addr;
ci->addr_tr_hia = data->ia.tr_hia_p_addr;
ci->num_cr_ia = BTINTEL_PCIE_NUM_QUEUES;
ci->num_tr_ia = BTINTEL_PCIE_NUM_QUEUES;
ci->addr_urbdq0 = data->txq.urbd0s_p_addr;
ci->addr_tfdq = data->txq.tfds_p_addr;
ci->num_tfdq = data->txq.count;
ci->num_urbdq0 = data->txq.count;
ci->tfdq_db_vec = BTINTEL_PCIE_TXQ_NUM;
ci->urbdq0_db_vec = BTINTEL_PCIE_TXQ_NUM;
ci->rbd_size = BTINTEL_PCIE_RBD_SIZE_4K;
ci->addr_frbdq = data->rxq.frbds_p_addr;
ci->num_frbdq = data->rxq.count;
ci->frbdq_db_vec = BTINTEL_PCIE_RXQ_NUM;
ci->addr_urbdq1 = data->rxq.urbd1s_p_addr;
ci->num_urbdq1 = data->rxq.count;
ci->urbdq_db_vec = BTINTEL_PCIE_RXQ_NUM;
ci->dbg_output_mode = 0x01;
ci->dbgc_addr = data->dbgc.frag_p_addr;
ci->dbgc_size = data->dbgc.frag_size;
ci->dbg_preset = 0x00;
}
static void btintel_pcie_free_txq_bufs(struct btintel_pcie_data *data,
struct txq *txq)
{
/* Free data buffers first */
dma_free_coherent(&data->pdev->dev, txq->count * BTINTEL_PCIE_BUFFER_SIZE,
txq->buf_v_addr, txq->buf_p_addr);
kfree(txq->bufs);
}
static int btintel_pcie_setup_txq_bufs(struct btintel_pcie_data *data,
struct txq *txq)
{
int i;
struct data_buf *buf;
/* Allocate the same number of buffers as the descriptor */
txq->bufs = kmalloc_objs(*buf, txq->count);
if (!txq->bufs)
return -ENOMEM;
/* Allocate full chunk of data buffer for DMA first and do indexing and
* initialization next, so it can be freed easily
*/
txq->buf_v_addr = dma_alloc_coherent(&data->pdev->dev,
txq->count * BTINTEL_PCIE_BUFFER_SIZE,
&txq->buf_p_addr,
GFP_KERNEL | __GFP_NOWARN);
if (!txq->buf_v_addr) {
kfree(txq->bufs);
return -ENOMEM;
}
/* Setup the allocated DMA buffer to bufs. Each data_buf should
* have virtual address and physical address
*/
for (i = 0; i < txq->count; i++) {
buf = &txq->bufs[i];
buf->data_p_addr = txq->buf_p_addr + (i * BTINTEL_PCIE_BUFFER_SIZE);
buf->data = txq->buf_v_addr + (i * BTINTEL_PCIE_BUFFER_SIZE);
}
return 0;
}
static void btintel_pcie_free_rxq_bufs(struct btintel_pcie_data *data,
struct rxq *rxq)
{
/* Free data buffers first */
dma_free_coherent(&data->pdev->dev, rxq->count * BTINTEL_PCIE_BUFFER_SIZE,
rxq->buf_v_addr, rxq->buf_p_addr);
kfree(rxq->bufs);
}
static int btintel_pcie_setup_rxq_bufs(struct btintel_pcie_data *data,
struct rxq *rxq)
{
int i;
struct data_buf *buf;
/* Allocate the same number of buffers as the descriptor */
rxq->bufs = kmalloc_objs(*buf, rxq->count);
if (!rxq->bufs)
return -ENOMEM;
/* Allocate full chunk of data buffer for DMA first and do indexing and
* initialization next, so it can be freed easily
*/
rxq->buf_v_addr = dma_alloc_coherent(&data->pdev->dev,
rxq->count * BTINTEL_PCIE_BUFFER_SIZE,
&rxq->buf_p_addr,
GFP_KERNEL | __GFP_NOWARN);
if (!rxq->buf_v_addr) {
kfree(rxq->bufs);
return -ENOMEM;
}
/* Setup the allocated DMA buffer to bufs. Each data_buf should
* have virtual address and physical address
*/
for (i = 0; i < rxq->count; i++) {
buf = &rxq->bufs[i];
buf->data_p_addr = rxq->buf_p_addr + (i * BTINTEL_PCIE_BUFFER_SIZE);
buf->data = rxq->buf_v_addr + (i * BTINTEL_PCIE_BUFFER_SIZE);
}
return 0;
}
static void btintel_pcie_free(struct btintel_pcie_data *data)
{
btintel_pcie_free_rxq_bufs(data, &data->rxq);
btintel_pcie_free_txq_bufs(data, &data->txq);
dma_pool_free(data->dma_pool, data->dma_v_addr, data->dma_p_addr);
dma_pool_destroy(data->dma_pool);
}
/* Allocate tx and rx queues, any related data structures and buffers.
*/
static int btintel_pcie_alloc(struct btintel_pcie_data *data)
{
int err = 0;
size_t total;
dma_addr_t p_addr;
void *v_addr;
size_t tfd_size, frbd_size, ctx_size, ci_size, urbd0_size, urbd1_size;
/* Allocate the chunk of DMA memory for descriptors, index array, and
* context information, instead of allocating individually.
* The DMA memory for data buffer is allocated while setting up the
* each queue.
*
* Total size is sum of the following and each of the individual sizes
* are aligned to 128 bytes before adding up.
*
* + size of TFD * Number of descriptors in queue
* + size of URBD0 * Number of descriptors in queue
* + size of FRBD * Number of descriptors in queue
* + size of URBD1 * Number of descriptors in queue
* + size of index * Number of queues(2) * type of index array(4)
* + size of context information
*/
tfd_size = ALIGN(sizeof(struct tfd) * BTINTEL_PCIE_TX_DESCS_COUNT,
BTINTEL_PCIE_DMA_ALIGN_128B);
urbd0_size = ALIGN(sizeof(struct urbd0) * BTINTEL_PCIE_TX_DESCS_COUNT,
BTINTEL_PCIE_DMA_ALIGN_128B);
frbd_size = ALIGN(sizeof(struct frbd) * BTINTEL_PCIE_RX_DESCS_COUNT,
BTINTEL_PCIE_DMA_ALIGN_128B);
urbd1_size = ALIGN(sizeof(struct urbd1) * BTINTEL_PCIE_RX_DESCS_COUNT,
BTINTEL_PCIE_DMA_ALIGN_128B);
ci_size = ALIGN(sizeof(u16) * BTINTEL_PCIE_NUM_QUEUES,
BTINTEL_PCIE_DMA_ALIGN_128B);
ctx_size = ALIGN(sizeof(struct ctx_info), BTINTEL_PCIE_DMA_ALIGN_128B);
total = tfd_size + urbd0_size + frbd_size + urbd1_size + ctx_size + ci_size * 4;
data->dma_pool = dma_pool_create(KBUILD_MODNAME, &data->pdev->dev,
total, BTINTEL_PCIE_DMA_ALIGN_128B, 0);
if (!data->dma_pool) {
err = -ENOMEM;
goto exit_error;
}
v_addr = dma_pool_zalloc(data->dma_pool, GFP_KERNEL | __GFP_NOWARN,
&p_addr);
if (!v_addr) {
dma_pool_destroy(data->dma_pool);
err = -ENOMEM;
goto exit_error;
}
data->dma_p_addr = p_addr;
data->dma_v_addr = v_addr;
/* Setup descriptor count */
data->txq.count = BTINTEL_PCIE_TX_DESCS_COUNT;
data->rxq.count = BTINTEL_PCIE_RX_DESCS_COUNT;
/* Setup tfds */
data->txq.tfds_p_addr = p_addr;
data->txq.tfds = v_addr;
p_addr += tfd_size;
v_addr += tfd_size;
/* Setup urbd0 */
data->txq.urbd0s_p_addr = p_addr;
data->txq.urbd0s = v_addr;
p_addr += urbd0_size;
v_addr += urbd0_size;
/* Setup FRBD*/
data->rxq.frbds_p_addr = p_addr;
data->rxq.frbds = v_addr;
p_addr += frbd_size;
v_addr += frbd_size;
/* Setup urbd1 */
data->rxq.urbd1s_p_addr = p_addr;
data->rxq.urbd1s = v_addr;
p_addr += urbd1_size;
v_addr += urbd1_size;
/* Setup data buffers for txq */
err = btintel_pcie_setup_txq_bufs(data, &data->txq);
if (err)
goto exit_error_pool;
/* Setup data buffers for rxq */
err = btintel_pcie_setup_rxq_bufs(data, &data->rxq);
if (err)
goto exit_error_txq;
/* TR Head Index Array */
data->ia.tr_hia_p_addr = p_addr;
data->ia.tr_hia = v_addr;
p_addr += ci_size;
v_addr += ci_size;
/* TR Tail Index Array */
data->ia.tr_tia_p_addr = p_addr;
data->ia.tr_tia = v_addr;
p_addr += ci_size;
v_addr += ci_size;
/* CR Head index Array */
data->ia.cr_hia_p_addr = p_addr;
data->ia.cr_hia = v_addr;
p_addr += ci_size;
v_addr += ci_size;
/* CR Tail Index Array */
data->ia.cr_tia_p_addr = p_addr;
data->ia.cr_tia = v_addr;
p_addr += ci_size;
v_addr += ci_size;
/* Setup data buffers for dbgc */
err = btintel_pcie_setup_dbgc(data);
if (err)
goto exit_error_txq;
/* Setup Context Information */
data->ci = v_addr;
data->ci_p_addr = p_addr;
/* Initialize the CI */
btintel_pcie_init_ci(data, data->ci);
return 0;
exit_error_txq:
btintel_pcie_free_txq_bufs(data, &data->txq);
exit_error_pool:
dma_pool_free(data->dma_pool, data->dma_v_addr, data->dma_p_addr);
dma_pool_destroy(data->dma_pool);
exit_error:
return err;
}
static int btintel_pcie_open(struct hci_dev *hdev)
{
bt_dev_dbg(hdev, "");
return 0;
}
static int btintel_pcie_close(struct hci_dev *hdev)
{
bt_dev_dbg(hdev, "");
return 0;
}
static int btintel_pcie_inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
{
struct sk_buff *skb;
struct hci_event_hdr *hdr;
struct hci_ev_cmd_complete *evt;
skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
if (!skb)
return -ENOMEM;
hdr = (struct hci_event_hdr *)skb_put(skb, sizeof(*hdr));
hdr->evt = HCI_EV_CMD_COMPLETE;
hdr->plen = sizeof(*evt) + 1;
evt = (struct hci_ev_cmd_complete *)skb_put(skb, sizeof(*evt));
evt->ncmd = 0x01;
evt->opcode = cpu_to_le16(opcode);
*(u8 *)skb_put(skb, 1) = 0x00;
hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
return hci_recv_frame(hdev, skb);
}
static int btintel_pcie_send_frame(struct hci_dev *hdev,
struct sk_buff *skb)
{
struct btintel_pcie_data *data = hci_get_drvdata(hdev);
struct hci_command_hdr *cmd;
__u16 opcode = ~0;
int ret;
u32 type;
if (test_bit(BTINTEL_PCIE_CORE_HALTED, &data->flags))
return -ENODEV;
if (test_bit(BTINTEL_PCIE_RECOVERY_IN_PROGRESS, &data->flags))
return -ENODEV;
/* Account for the 4-byte PCIe type header prepended before the
* DMA copy. Written as a subtraction to avoid wrap-around on
* attacker-controlled skb->len.
*/
if (skb->len > BTINTEL_PCIE_BUFFER_SIZE - BTINTEL_PCIE_HCI_TYPE_LEN) {
bt_dev_err(hdev, "Packet too large: %u > %u", skb->len,
BTINTEL_PCIE_BUFFER_SIZE - BTINTEL_PCIE_HCI_TYPE_LEN);
return -EMSGSIZE;
}
/* Due to the fw limitation, the type header of the packet should be
* 4 bytes unlike 1 byte for UART. In UART, the firmware can read
* the first byte to get the packet type and redirect the rest of data
* packet to the right handler.
*
* But for PCIe, THF(Transfer Flow Handler) fetches the 4 bytes of data
* from DMA memory and by the time it reads the first 4 bytes, it has
* already consumed some part of packet. Thus the packet type indicator
* for iBT PCIe is 4 bytes.
*
* Luckily, when HCI core creates the skb, it allocates 8 bytes of
* head room for profile and driver use, and before sending the data
* to the device, append the iBT PCIe packet type in the front.
*/
switch (hci_skb_pkt_type(skb)) {
case HCI_COMMAND_PKT:
type = BTINTEL_PCIE_HCI_CMD_PKT;
cmd = (void *)skb->data;
opcode = le16_to_cpu(cmd->opcode);
if (btintel_test_flag(hdev, INTEL_BOOTLOADER)) {
struct hci_command_hdr *cmd = (void *)skb->data;
__u16 opcode = le16_to_cpu(cmd->opcode);
/* When the BTINTEL_HCI_OP_RESET command is issued to
* boot into the operational firmware, it will actually
* not send a command complete event. To keep the flow
* control working inject that event here.
*/
if (opcode == BTINTEL_HCI_OP_RESET)
btintel_pcie_inject_cmd_complete(hdev, opcode);
}
hdev->stat.cmd_tx++;
break;
case HCI_ACLDATA_PKT:
type = BTINTEL_PCIE_HCI_ACL_PKT;
hdev->stat.acl_tx++;
break;
case HCI_SCODATA_PKT:
type = BTINTEL_PCIE_HCI_SCO_PKT;
hdev->stat.sco_tx++;
break;
case HCI_ISODATA_PKT:
type = BTINTEL_PCIE_HCI_ISO_PKT;
break;
default:
bt_dev_err(hdev, "Unknown HCI packet type");
return -EILSEQ;
}
ret = btintel_pcie_send_sync(data, skb, type, opcode);
if (ret) {
hdev->stat.err_tx++;
bt_dev_err(hdev, "Failed to send frame (%d)", ret);
goto exit_error;
}
hdev->stat.byte_tx += skb->len;
kfree_skb(skb);
exit_error:
return ret;
}
static void btintel_pcie_release_hdev(struct btintel_pcie_data *data)
{
struct hci_dev *hdev = data->hdev;
if (!hdev)
return;
hci_unregister_dev(hdev);
hci_free_dev(hdev);
data->hdev = NULL;
}
static void btintel_pcie_disable_interrupts(struct btintel_pcie_data *data)
{
spin_lock(&data->irq_lock);
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_MSIX_FH_INT_MASK, data->fh_init_mask);
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_MSIX_HW_INT_MASK, data->hw_init_mask);
spin_unlock(&data->irq_lock);
}
static void btintel_pcie_enable_interrupts(struct btintel_pcie_data *data)
{
spin_lock(&data->irq_lock);
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_MSIX_FH_INT_MASK, ~data->fh_init_mask);
btintel_pcie_wr_reg32(data, BTINTEL_PCIE_CSR_MSIX_HW_INT_MASK, ~data->hw_init_mask);
spin_unlock(&data->irq_lock);
}
static void btintel_pcie_synchronize_irqs(struct btintel_pcie_data *data)
{
for (int i = 0; i < data->alloc_vecs; i++)
synchronize_irq(data->msix_entries[i].vector);
}
static int btintel_pcie_get_debug_info_addr(struct hci_dev *hdev)
{
struct btintel_pcie_data *data = hci_get_drvdata(hdev);
struct btintel_pcie_trigger_evt *evt;
u8 param[1] = {0x10};
struct sk_buff *skb;
int err = 0;
skb = __hci_cmd_sync(hdev, BTINTEL_HCI_OP_DEBUG, 1, param,
HCI_CMD_TIMEOUT);
if (IS_ERR(skb)) {
bt_dev_err(hdev, "Reading Intel read debug info address command failed (%ld)",
PTR_ERR(skb));
/* Not all Intel products supports this command */
if (PTR_ERR(skb) == -EOPNOTSUPP)
return 0;
return PTR_ERR(skb);
}
if (skb->len < (1 + sizeof(*evt))) {
bt_dev_err(hdev, "Debug info response too short (%u bytes)", skb->len);
err = -EIO;
goto exit_error;
}
/* Check the status */
if (skb->data[0]) {
bt_dev_err(hdev, "Reading Intel read debug info command failed (0x%2.2x)",
skb->data[0]);
err = -EIO;
goto exit_error;
}
/* Consume Command Complete Status field */
skb_pull(skb, 1);
evt = (void *)skb->data;
data->debug_evt_addr = le32_to_cpu(evt->addr);
data->debug_evt_size = le32_to_cpu(evt->size);
bt_dev_dbg(hdev, "config type: %u config len: %u debug event addr: 0x%8.8x size: 0x%8.8x",
evt->type, evt->len, data->debug_evt_addr,
data->debug_evt_size);
exit_error:
kfree_skb(skb);
return err;
}
static int btintel_pcie_setup_internal(struct hci_dev *hdev)
{
struct btintel_pcie_data *data = hci_get_drvdata(hdev);
const u8 param[1] = { 0xFF };
struct intel_version_tlv ver_tlv;
struct sk_buff *skb;
int err;
BT_DBG("%s", hdev->name);
skb = __hci_cmd_sync(hdev, 0xfc05, 1, param, HCI_CMD_TIMEOUT);
if (IS_ERR(skb)) {
bt_dev_err(hdev, "Reading Intel version command failed (%ld)",
PTR_ERR(skb));
return PTR_ERR(skb);
}
/* Check the status */
if (skb->data[0]) {
bt_dev_err(hdev, "Intel Read Version command failed (%02x)",
skb->data[0]);
err = -EIO;
goto exit_error;
}
/* Apply the common HCI quirks for Intel device */
hci_set_quirk(hdev, HCI_QUIRK_STRICT_DUPLICATE_FILTER);
hci_set_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY);
hci_set_quirk(hdev, HCI_QUIRK_NON_PERSISTENT_DIAG);
/* Set up the quality report callback for Intel devices */
hdev->set_quality_report = btintel_set_quality_report;
memset(&ver_tlv, 0, sizeof(ver_tlv));
/* For TLV type device, parse the tlv data */
err = btintel_parse_version_tlv(hdev, &ver_tlv, skb);
if (err) {
bt_dev_err(hdev, "Failed to parse TLV version information");
goto exit_error;
}
switch (INTEL_HW_PLATFORM(ver_tlv.cnvi_bt)) {
case 0x37:
break;
default:
bt_dev_err(hdev, "Unsupported Intel hardware platform (0x%2x)",
INTEL_HW_PLATFORM(ver_tlv.cnvi_bt));
err = -EINVAL;
goto exit_error;
}
/* Check for supported iBT hardware variants of this firmware
* loading method.
*
* This check has been put in place to ensure correct forward
* compatibility options when newer hardware variants come
* along.
*/
switch (INTEL_HW_VARIANT(ver_tlv.cnvi_bt)) {
case 0x1e: /* BzrI */
case 0x1f: /* ScP */
case 0x20: /* ScP2 */
case 0x21: /* ScP2 F */
case 0x22: /* BzrIW */
/* Display version information of TLV type */
btintel_version_info_tlv(hdev, &ver_tlv);
/* Apply the device specific HCI quirks for TLV based devices
*
* All TLV based devices support WBS
*/
hci_set_quirk(hdev, HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED);
/* Setup MSFT Extension support */
btintel_set_msft_opcode(hdev,
INTEL_HW_VARIANT(ver_tlv.cnvi_bt));
err = btintel_bootloader_setup_tlv(hdev, &ver_tlv);
if (err)
goto exit_error;
break;
default:
bt_dev_err(hdev, "Unsupported Intel hw variant (%u)",
INTEL_HW_VARIANT(ver_tlv.cnvi_bt));
err = -EINVAL;
goto exit_error;
}
data->dmp_hdr.cnvi_top = ver_tlv.cnvi_top;
data->dmp_hdr.cnvr_top = ver_tlv.cnvr_top;
data->dmp_hdr.fw_timestamp = ver_tlv.timestamp;
data->dmp_hdr.fw_build_type = ver_tlv.build_type;
data->dmp_hdr.fw_build_num = ver_tlv.build_num;
data->dmp_hdr.cnvi_bt = ver_tlv.cnvi_bt;
if (ver_tlv.img_type == 0x02 || ver_tlv.img_type == 0x03)
data->dmp_hdr.fw_git_sha1 = ver_tlv.git_sha1;
err = btintel_pcie_get_debug_info_addr(hdev);
if (err)
goto exit_error;
btintel_print_fseq_info(hdev);
exit_error:
kfree_skb(skb);
return err;
}
static int btintel_pcie_setup(struct hci_dev *hdev)
{
int err, fw_dl_retry = 0;
struct btintel_pcie_data *data = hci_get_drvdata(hdev);
while ((err = btintel_pcie_setup_internal(hdev)) && fw_dl_retry++ < 1) {
bt_dev_err(hdev, "Firmware download retry count: %d",
fw_dl_retry);
btintel_pcie_dump_debug_registers(hdev);
btintel_pcie_disable_interrupts(data);
btintel_pcie_synchronize_irqs(data);
err = btintel_pcie_reset_bt(data);
if (err) {
bt_dev_err(hdev, "Failed to do shr reset: %d", err);
break;
}
usleep_range(10000, 12000);
btintel_pcie_reset_ia(data);
btintel_pcie_enable_interrupts(data);
btintel_pcie_config_msix(data);
err = btintel_pcie_enable_bt(data);
if (err) {
bt_dev_err(hdev, "Failed to enable hardware: %d", err);
break;
}
btintel_pcie_start_rx(data);
}
if (!err)
set_bit(BTINTEL_PCIE_SETUP_DONE, &data->flags);
return err;
}
static struct btintel_pcie_dev_recovery *
btintel_pcie_get_recovery(struct pci_dev *pdev, struct device *dev)
{
struct btintel_pcie_dev_recovery *tmp, *data = NULL;
const char *name = pci_name(pdev);
const size_t name_len = strlen(name) + 1;
struct hci_dev *hdev = to_hci_dev(dev);
spin_lock(&btintel_pcie_recovery_lock);
list_for_each_entry(tmp, &btintel_pcie_recovery_list, list) {
if (strcmp(tmp->name, name))
continue;
data = tmp;
break;
}
spin_unlock(&btintel_pcie_recovery_lock);
if (data) {
bt_dev_dbg(hdev, "Found restart data for BDF: %s", data->name);
return data;
}
data = kzalloc_flex(*data, name, name_len, GFP_ATOMIC);
if (!data)
return NULL;
strscpy(data->name, name, name_len);
spin_lock(&btintel_pcie_recovery_lock);
list_add_tail(&data->list, &btintel_pcie_recovery_list);
spin_unlock(&btintel_pcie_recovery_lock);
return data;
}
static void btintel_pcie_free_restart_list(void)
{
struct btintel_pcie_dev_recovery *tmp;
while ((tmp = list_first_entry_or_null(&btintel_pcie_recovery_list,
typeof(*tmp), list))) {
list_del(&tmp->list);
kfree(tmp);
}
}
static void btintel_pcie_inc_recovery_count(struct pci_dev *pdev,
struct device *dev)
{
struct btintel_pcie_dev_recovery *data;
time64_t retry_window;
data = btintel_pcie_get_recovery(pdev, dev);
if (!data)
return;
retry_window = ktime_get_boottime_seconds() - data->last_error;
if (data->count == 0) {
data->last_error = ktime_get_boottime_seconds();
data->count++;
} else if (retry_window < BTINTEL_PCIE_RESET_WINDOW_SECS &&
data->count <= BTINTEL_PCIE_FLR_MAX_RETRY) {
data->count++;
} else if (retry_window > BTINTEL_PCIE_RESET_WINDOW_SECS) {
data->last_error = 0;
data->count = 0;
}
}
static int btintel_pcie_acpi_reset_method(struct btintel_pcie_data *data)
{
union acpi_object *obj, argv4;
acpi_handle handle;
int ret;
struct pldr_mode {
__le16 cmd_type;
__le16 cmd_payload;
} __packed;
/* set 1 for _PRR mode
* Product Reset (PLDR Abort flow)
*/
static const struct pldr_mode mode = {
.cmd_type = cpu_to_le16(1),
.cmd_payload = cpu_to_le16(BTINTEL_PCIE_DSM_PLDR_MODE_EN_PROD_RESET |
BTINTEL_PCIE_DSM_PLDR_MODE_EN_WIFI_FLR),
};
struct hci_dev *hdev = data->hdev;
handle = ACPI_HANDLE(GET_HCIDEV_DEV(data->hdev));
if (!handle) {
bt_dev_err(data->hdev, "No support for bluetooth device in ACPI firmware");
return -EACCES;
}
if (!acpi_has_method(handle, "_PRR")) {
bt_dev_err(data->hdev, "No support for _PRR ACPI method, cold boot");
return -ENODEV;
}
argv4.buffer.type = ACPI_TYPE_BUFFER;
argv4.buffer.length = sizeof(mode);
argv4.buffer.pointer = (void *)&mode;
obj = acpi_evaluate_dsm(handle, &btintel_guid_dsm, 0,
BTINTEL_PCIE_DSM_DYNAMIC_PLDR, &argv4);
if (!obj) {
bt_dev_err(data->hdev, "Failed to call dsm to set reset method");
return -EIO;
}
ACPI_FREE(obj);
pci_dev_lock(data->pdev);
pci_save_state(data->pdev);
ret = btintel_acpi_reset_method(hdev);
if (ret)
bt_dev_err(data->hdev, "ACPI _PRR reset failed (%d), PLDR incomplete",
ret);
pci_restore_state(data->pdev);
pci_dev_unlock(data->pdev);
return ret;
}
static void btintel_pcie_perform_pldr(struct btintel_pcie_data *data)
{
struct pci_dev *pdev = data->pdev;
struct pci_dev *wifi = NULL;
struct pci_bus *bus;
int ret;
/* on integrated we have to look up by ID (same bus) */
static const struct pci_device_id wifi_device_ids[] = {
#define WIFI_DEV(_id) { PCI_DEVICE(PCI_VENDOR_ID_INTEL, _id) }
WIFI_DEV(0xA840), /* LNL */
WIFI_DEV(0xE440), /* PTL-P */
WIFI_DEV(0xE340), /* PTL-H */
WIFI_DEV(0xD340), /* NVL-H */
WIFI_DEV(0x6E70), /* NVL-S */
WIFI_DEV(0x4D40), /* WCL */
{}
};
struct pci_dev *tmp = NULL;
bus = pdev->bus;
if (!bus)
return;
list_for_each_entry(tmp, &bus->devices, bus_list) {
if (pci_match_id(wifi_device_ids, tmp)) {
wifi = pci_dev_get(tmp);
break;
}
}
if (wifi)
device_release_driver(&wifi->dev);
/* Wi-Fi is fully unbound before the reset and fully reprobed after
* the normal PCI probe path handles all state setup from scratch.
* BT needs pci_save_state()/pci_restore_state() because the BT driver
* is still partially attached when the _PRR runs (it hasn't been unbound yet).
* The PCI device needs to remain minimally functional so that
* device_reprobe(&pdev->dev) can work afterward
*/
ret = btintel_pcie_acpi_reset_method(data);
if (wifi) {
if (device_reprobe(&wifi->dev))
BT_ERR("WiFi reprobe failed for BDF:%s", pci_name(wifi));
pci_dev_put(wifi);
}
if (!ret) {
if (device_reprobe(&pdev->dev))
BT_ERR("BT reprobe failed for BDF:%s", pci_name(pdev));
}
}
/*
* Issue a Function Level Reset and hand teardown/re-init off to the PCI
* core via device_reprobe(), mirroring the PLDR path's contract.
*
* Caller must hold pci_lock_rescan_remove() and must have already
* disabled interrupts and drained both rx_work and coredump_work.
*/
static int btintel_pcie_perform_flr(struct btintel_pcie_data *data)
{
struct pci_dev *pdev = data->pdev;
int err;
/* pci_try_reset_function() avoids the device_lock ABBA against
* btintel_pcie_remove(): .remove() runs with device_lock held and
* then waits for this work via disable_work_sync(); the blocking
* pci_reset_function() would deadlock by trying to re-acquire
* device_lock here.
*/
err = pci_try_reset_function(pdev);
if (err) {
BT_ERR("Failed resetting the pcie device (%d)", err);
return err;
}
/* device_reprobe() always detaches the driver first (running
* .remove(), which frees 'data'); any re-probe failure leaves the
* device unbound but 'data' is already gone, so just log it.
*/
if (device_reprobe(&pdev->dev))
BT_ERR("BT reprobe failed for BDF:%s", pci_name(pdev));
return 0;
}
static void btintel_pcie_reset_work(struct work_struct *wk)
{
struct btintel_pcie_data *data =
container_of(wk, struct btintel_pcie_data, reset_work);
struct pci_dev *pdev = data->pdev;
pci_lock_rescan_remove();
if (!pdev->bus)
goto out;
if (!data)
goto out;
btintel_pcie_disable_interrupts(data);
btintel_pcie_synchronize_irqs(data);
flush_work(&data->rx_work);
/* Drain any in-flight dump workers and block new ones across reset.
* Safe from self-deadlock: they all run on a separate wq.
*/
disable_work_sync(&data->coredump_work);
disable_work_sync(&data->hwexp_work);
disable_work_sync(&data->fwtrigger_work);
bt_dev_dbg(data->hdev, "Release bluetooth interface");
/* Both reset paths follow the same contract: on success they
* destroy 'data' via device_reprobe() (a fresh probe re-INIT_WORKs
* the dump workers with disable count 0), so enable_work() must
* NOT be called on the success path. Only the FLR path can fail
* with 'data' still alive, in which case we balance the
* disable_work_sync() calls above so a later successful reset is
* not permanently blocked.
*
* pci_lock_rescan_remove() (held above) serializes against PCI
* device addition/removal (hotplug), so no device can be added to
* or removed from the bus list while this code runs.
*/
if (data->reset_type == BTINTEL_PCIE_IOSF_PRR_PLDR) {
btintel_pcie_perform_pldr(data);
goto out;
}
if (btintel_pcie_perform_flr(data)) {
enable_work(&data->coredump_work);
enable_work(&data->hwexp_work);
enable_work(&data->fwtrigger_work);
}
out:
pci_dev_put(pdev);
pci_unlock_rescan_remove();
}
/* Schedule a device reset of the requested type.
*
* BTINTEL_PCIE_RECOVERY_IN_PROGRESS serializes all reset requesters
* (sysfs reset attribute, hci_cmd_timeout(), hw_error, resume error
* path, etc.) so that:
*
* - dev_data->reset_type is written by exactly one caller (the
* thread that wins test_and_set_bit), eliminating the race where
* a second hw_error could clobber an already-scheduled reset's
* type;
* - the write happens AFTER the bit is set, so reset_work observes
* it through schedule_work()'s memory ordering;
* - losers return without touching reset_type or scheduling the
* work, so concurrent triggers are silently coalesced into the
* in-flight one (whose recovery will reinitialize the device
* regardless of the dropped trigger's variant).
*
* The bit is cleared only by .remove() / re-probe via fresh devm
* allocation, which is the intended one-shot semantics: a reset
* tears down and re-probes 'data', so there is no "in-flight"
* reset to follow up after device_reprobe() succeeds.
*/
static void btintel_pcie_request_reset(struct btintel_pcie_data *data,
enum btintel_pcie_reset_type type)
{
if (!test_bit(BTINTEL_PCIE_SETUP_DONE, &data->flags))
return;
if (test_and_set_bit(BTINTEL_PCIE_RECOVERY_IN_PROGRESS, &data->flags))
return;
data->reset_type = type;
pci_dev_get(data->pdev);
schedule_work(&data->reset_work);
}
static void btintel_pcie_hci_reset(struct hci_dev *hdev)
{
struct btintel_pcie_data *data = hci_get_drvdata(hdev);
btintel_pcie_request_reset(data, BTINTEL_PCIE_IOSF_PRR_FLR);
}
static ssize_t vendor_reset_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned int val;
struct pci_dev *pdev = to_pci_dev(dev);
struct btintel_pcie_data *data = pci_get_drvdata(pdev);
if (!data || !data->hdev)
return -ENODEV;
if (kstrtouint(buf, 10, &val) || val != 0) {
bt_dev_warn(data->hdev, "PLDR rejected: invalid input");
return -EINVAL;
}
bt_dev_info(data->hdev, "PLDR triggered via sysfs");
btintel_pcie_request_reset(data, BTINTEL_PCIE_IOSF_PRR_PLDR);
return count;
}
static ssize_t vendor_reset_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sysfs_emit(buf, "0 - PLDR\n");
}
static DEVICE_ATTR_RW(vendor_reset);
static struct attribute *btintel_pcie_attrs[] = {
&dev_attr_vendor_reset.attr,
NULL,
};
ATTRIBUTE_GROUPS(btintel_pcie);
static void btintel_pcie_hw_error(struct hci_dev *hdev, u8 code)
{
struct btintel_pcie_dev_recovery *rec;
struct btintel_pcie_data *dev_data = hci_get_drvdata(hdev);
struct pci_dev *pdev = dev_data->pdev;
enum btintel_pcie_reset_type type;
time64_t retry_window;
if (test_bit(BTINTEL_PCIE_RECOVERY_IN_PROGRESS, &dev_data->flags))
return;
btintel_pcie_dump_debug_registers(hdev);
rec = btintel_pcie_get_recovery(pdev, &hdev->dev);
if (!rec)
return;
type = (code == 0x13) ? BTINTEL_PCIE_IOSF_PRR_PLDR
: BTINTEL_PCIE_IOSF_PRR_FLR;
bt_dev_err(hdev, "Encountered exception err:0x%x triggering: %s", code,
type == BTINTEL_PCIE_IOSF_PRR_PLDR ? "PLDR" : "FLR");
retry_window = ktime_get_boottime_seconds() - rec->last_error;
if (retry_window < BTINTEL_PCIE_RESET_WINDOW_SECS &&
rec->count >= BTINTEL_PCIE_FLR_MAX_RETRY) {
bt_dev_err(hdev, "Exhausted maximum: %d recovery attempts: %d",
BTINTEL_PCIE_FLR_MAX_RETRY, rec->count);
bt_dev_dbg(hdev, "Boot time: %lld seconds",
ktime_get_boottime_seconds());
bt_dev_dbg(hdev, "last error at: %lld seconds",
rec->last_error);
return;
}
btintel_pcie_inc_recovery_count(pdev, &hdev->dev);
btintel_pcie_request_reset(dev_data, type);
}
static bool btintel_pcie_wakeup(struct hci_dev *hdev)
{
struct btintel_pcie_data *data = hci_get_drvdata(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 = struct_size(rp, supported_commands, num_supported_commands);
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;
struct hci_dev *hdev;
hdev = hci_alloc_dev_priv(sizeof(struct btintel_data));
if (!hdev)
return -ENOMEM;
hdev->bus = HCI_PCI;
hci_set_drvdata(hdev, data);
SET_HCIDEV_DEV(hdev, &data->pdev->dev);
hdev->manufacturer = 2;
hdev->open = btintel_pcie_open;
hdev->close = btintel_pcie_close;
hdev->send = btintel_pcie_send_frame;
hdev->setup = btintel_pcie_setup;
hdev->shutdown = btintel_shutdown_combined;
hdev->hw_error = btintel_pcie_hw_error;
hdev->set_diag = btintel_set_diag;
hdev->set_bdaddr = btintel_set_bdaddr;
hdev->reset = btintel_pcie_hci_reset;
hdev->wakeup = btintel_pcie_wakeup;
hdev->hci_drv = &btintel_pcie_hci_drv;
err = hci_register_dev(hdev);
if (err < 0) {
BT_ERR("Failed to register to hdev (%d)", err);
hci_free_dev(hdev);
return err;
}
/* Publish hdev only after successful registration; the coredump
* worker bails on !data->hdev, so it never observes a half-set-up
* device.
*/
data->hdev = hdev;
data->dmp_hdr.driver_name = KBUILD_MODNAME;
return 0;
}
static int btintel_pcie_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int err;
struct btintel_pcie_data *data;
if (!pdev)
return -ENODEV;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->pdev = pdev;
spin_lock_init(&data->irq_lock);
spin_lock_init(&data->hci_rx_lock);
init_waitqueue_head(&data->gp0_wait_q);
data->gp0_received = false;
init_waitqueue_head(&data->tx_wait_q);
data->tx_wait_done = false;
data->workqueue = alloc_ordered_workqueue(KBUILD_MODNAME, WQ_HIGHPRI);
if (!data->workqueue)
return -ENOMEM;
data->dump_workqueue = alloc_ordered_workqueue(KBUILD_MODNAME "_cd", 0);
if (!data->dump_workqueue) {
destroy_workqueue(data->workqueue);
return -ENOMEM;
}
skb_queue_head_init(&data->rx_skb_q);
INIT_WORK(&data->rx_work, btintel_pcie_rx_work);
INIT_WORK(&data->reset_work, btintel_pcie_reset_work);
INIT_WORK(&data->coredump_work, btintel_pcie_coredump_worker);
INIT_WORK(&data->hwexp_work, btintel_pcie_hwexp_worker);
INIT_WORK(&data->fwtrigger_work, btintel_pcie_fwtrigger_worker);
data->boot_stage_cache = 0x00;
data->img_resp_cache = 0x00;
/* FLR can be invoked by echoing to debugfs path, so explicitly
* initialized
*/
data->reset_type = BTINTEL_PCIE_IOSF_PRR_FLR;
err = btintel_pcie_config_pcie(pdev, data);
if (err)
goto exit_error;
pci_set_drvdata(pdev, data);
err = btintel_pcie_alloc(data);
if (err)
goto exit_error;
err = btintel_pcie_enable_bt(data);
if (err)
goto exit_error;
/* CNV information (CNVi and CNVr) is in CSR */
data->cnvi = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_HW_REV_REG);
data->cnvr = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_RF_ID_REG);
err = btintel_pcie_start_rx(data);
if (err)
goto exit_error;
err = btintel_pcie_setup_hdev(data);
if (err)
goto exit_error;
bt_dev_dbg(data->hdev, "cnvi: 0x%8.8x cnvr: 0x%8.8x", data->cnvi,
data->cnvr);
return 0;
exit_error:
/* reset device before exit */
btintel_pcie_reset_bt(data);
destroy_workqueue(data->dump_workqueue);
pci_clear_master(pdev);
pci_set_drvdata(pdev, NULL);
return err;
}
static void btintel_pcie_remove(struct pci_dev *pdev)
{
struct btintel_pcie_data *data;
data = pci_get_drvdata(pdev);
if (!data) {
BT_WARN("PCI driver data is NULL, aborting remove");
return;
}
/* Permanently block all dump triggers and drain the workers before
* tearing down. Must run before disable_work_sync(&reset_work) so
* the disable counters stay >= 1 even after reset_work()'s
* balanced enable_work() (counter 2 -> 1, never reaching 0).
*/
disable_work_sync(&data->coredump_work);
disable_work_sync(&data->hwexp_work);
disable_work_sync(&data->fwtrigger_work);
/* Cancel pending reset work. Skip only when remove() is called from
* within the reset work itself (PLDR device_reprobe path) to avoid
* deadlock. current_work() returns the work_struct of the caller if
* we are in a workqueue context.
*/
if (current_work() != &data->reset_work)
disable_work_sync(&data->reset_work);
btintel_pcie_disable_interrupts(data);
btintel_pcie_synchronize_irqs(data);
flush_work(&data->rx_work);
btintel_pcie_reset_bt(data);
for (int i = 0; i < data->alloc_vecs; i++) {
struct msix_entry *msix_entry;
msix_entry = &data->msix_entries[i];
devm_free_irq(&pdev->dev, msix_entry->vector, msix_entry);
}
pci_free_irq_vectors(pdev);
btintel_pcie_release_hdev(data);
destroy_workqueue(data->dump_workqueue);
destroy_workqueue(data->workqueue);
btintel_pcie_free(data);
pci_clear_master(pdev);
pci_set_drvdata(pdev, NULL);
}
#ifdef CONFIG_DEV_COREDUMP
static void btintel_pcie_coredump(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct btintel_pcie_data *data = pci_get_drvdata(pdev);
if (!data)
return;
btintel_pcie_queue_coredump(data,
BTINTEL_PCIE_TRIGGER_REASON_USER_TRIGGER);
}
#endif
static int btintel_pcie_set_dxstate(struct btintel_pcie_data *data, u32 dxstate)
{
int retry = 0, status;
u32 dx_intr_timeout_ms = 200;
do {
data->gp0_received = false;
btintel_pcie_wr_sleep_cntrl(data, dxstate);
status = wait_event_timeout(data->gp0_wait_q, data->gp0_received,
msecs_to_jiffies(dx_intr_timeout_ms));
if (status)
return 0;
bt_dev_warn(data->hdev,
"Timeout (%u ms) on alive interrupt for D%d entry, retry count %d",
dx_intr_timeout_ms, dxstate, retry);
/* clear gp0 cause */
btintel_pcie_clr_reg_bits(data,
BTINTEL_PCIE_CSR_MSIX_HW_INT_CAUSES,
BTINTEL_PCIE_MSIX_HW_INT_CAUSES_GP0);
/* A hardware bug may cause the alive interrupt to be missed.
* Check if the controller reached the expected state and retry
* the operation only if it hasn't.
*/
if (dxstate == BTINTEL_PCIE_STATE_D0) {
if (btintel_pcie_in_d0(data))
return 0;
} else {
if (btintel_pcie_in_d3(data))
return 0;
}
} while (++retry < BTINTEL_PCIE_DX_TRANSITION_MAX_RETRIES);
return -EBUSY;
}
static int btintel_pcie_suspend_late(struct device *dev, pm_message_t mesg)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct btintel_pcie_data *data;
ktime_t start;
u32 dxstate;
int err;
data = pci_get_drvdata(pdev);
dxstate = (mesg.event == PM_EVENT_SUSPEND ?
BTINTEL_PCIE_STATE_D3_HOT : BTINTEL_PCIE_STATE_D3_COLD);
data->pm_sx_event = mesg.event;
start = ktime_get();
/* Refer: 6.4.11.7 -> Platform power management */
err = btintel_pcie_set_dxstate(data, dxstate);
if (err)
return err;
bt_dev_dbg(data->hdev,
"device entered into d3 state from d0 in %lld us",
ktime_to_us(ktime_get() - start));
return err;
}
static int btintel_pcie_suspend(struct device *dev)
{
return btintel_pcie_suspend_late(dev, PMSG_SUSPEND);
}
static int btintel_pcie_hibernate(struct device *dev)
{
return btintel_pcie_suspend_late(dev, PMSG_HIBERNATE);
}
static int btintel_pcie_freeze(struct device *dev)
{
return btintel_pcie_suspend_late(dev, PMSG_FREEZE);
}
static int btintel_pcie_resume(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct btintel_pcie_data *data;
ktime_t start;
int err;
data = pci_get_drvdata(pdev);
data->gp0_received = false;
start = ktime_get();
/* When the system enters S4 (hibernate) mode, bluetooth device loses
* power, which results in the erasure of its loaded firmware.
* Consequently, function level reset (flr) is required on system
* resume to bring the controller back into an operational state by
* initiating a new firmware download.
*/
if (data->pm_sx_event == PM_EVENT_FREEZE ||
data->pm_sx_event == PM_EVENT_HIBERNATE) {
set_bit(BTINTEL_PCIE_CORE_HALTED, &data->flags);
btintel_pcie_request_reset(data, BTINTEL_PCIE_IOSF_PRR_FLR);
return 0;
}
/* Refer: 6.4.11.7 -> Platform power management */
err = btintel_pcie_set_dxstate(data, BTINTEL_PCIE_STATE_D0);
if (err == 0) {
bt_dev_dbg(data->hdev,
"device entered into d0 state from d3 in %lld us",
ktime_to_us(ktime_get() - start));
return err;
}
/* Trigger function level reset if the controller is in error
* state during resume() to bring back the controller to
* operational mode
*/
data->boot_stage_cache = btintel_pcie_rd_reg32(data,
BTINTEL_PCIE_CSR_BOOT_STAGE_REG);
if (btintel_pcie_in_error(data) ||
btintel_pcie_in_device_halt(data)) {
bt_dev_err(data->hdev, "Controller in error state for D0 entry");
btintel_pcie_queue_coredump(data,
BTINTEL_PCIE_TRIGGER_REASON_FW_ASSERT);
set_bit(BTINTEL_PCIE_CORE_HALTED, &data->flags);
btintel_pcie_request_reset(data, BTINTEL_PCIE_IOSF_PRR_FLR);
}
return err;
}
static const struct dev_pm_ops btintel_pcie_pm_ops = {
.suspend = btintel_pcie_suspend,
.resume = btintel_pcie_resume,
.freeze = btintel_pcie_freeze,
.thaw = btintel_pcie_resume,
.poweroff = btintel_pcie_hibernate,
.restore = btintel_pcie_resume,
};
static struct pci_driver btintel_pcie_driver = {
.name = KBUILD_MODNAME,
.id_table = btintel_pcie_table,
.probe = btintel_pcie_probe,
.remove = btintel_pcie_remove,
.driver.pm = pm_sleep_ptr(&btintel_pcie_pm_ops),
.dev_groups = btintel_pcie_groups,
#ifdef CONFIG_DEV_COREDUMP
.driver.coredump = btintel_pcie_coredump
#endif
};
static int __init btintel_pcie_init(void)
{
return pci_register_driver(&btintel_pcie_driver);
}
static void __exit btintel_pcie_exit(void)
{
pci_unregister_driver(&btintel_pcie_driver);
btintel_pcie_free_restart_list();
}
module_init(btintel_pcie_init);
module_exit(btintel_pcie_exit);
MODULE_AUTHOR("Tedd Ho-Jeong An <tedd.an@intel.com>");
MODULE_DESCRIPTION("Intel Bluetooth PCIe transport driver ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");