diff options
Diffstat (limited to 'drivers/bluetooth/btintel_pcie.c')
| -rw-r--r-- | drivers/bluetooth/btintel_pcie.c | 3313 |
1 files changed, 3313 insertions, 0 deletions
diff --git a/drivers/bluetooth/btintel_pcie.c b/drivers/bluetooth/btintel_pcie.c new file mode 100644 index 000000000..005c77a4f --- /dev/null +++ b/drivers/bluetooth/btintel_pcie.c @@ -0,0 +1,3313 @@ +// 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; + + /* 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; + + 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; + u16 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) { + 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; + + /* 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); + + 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 */ + 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; + + 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) { + 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); + + 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; + + /* 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]; + free_irq(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"); |