Lines Matching +full:os +full:- +full:initiated
1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (c) 2014-2016, Intel Corporation.
13 #include "hw-ish.h"
21 * ish_reg_read() - Read register
34 return readl(hw->mem_addr + offset); in ish_reg_read()
38 * ish_reg_write() - Write register
51 writel(value, hw->mem_addr + offset); in ish_reg_write()
55 * _ish_read_fw_sts_reg() - Read FW status register
68 * check_generated_interrupt() - Check if ISH interrupt
80 if (dev->pdev->device == CHV_DEVICE_ID) { in check_generated_interrupt()
87 /* only busy-clear bit is RW, others are RO */ in check_generated_interrupt()
96 * ish_is_input_ready() - Check if FW ready for RX
112 * set_host_ready() - Indicate host ready
119 if (dev->pdev->device == CHV_DEVICE_ID) { in set_host_ready()
120 if (dev->pdev->revision == REVISION_ID_CHT_A0 || in set_host_ready()
121 (dev->pdev->revision & REVISION_ID_SI_MASK) == in set_host_ready()
124 else if (dev->pdev->revision == REVISION_ID_CHT_B0 || in set_host_ready()
125 (dev->pdev->revision & REVISION_ID_SI_MASK) == in set_host_ready()
127 (dev->pdev->revision & REVISION_ID_SI_MASK) == in set_host_ready()
129 (dev->pdev->revision & REVISION_ID_SI_MASK) == in set_host_ready()
153 * ishtp_fw_is_ready() - Check if FW ready
169 * ish_set_host_rdy() - Indicate host ready
183 * ish_clr_host_rdy() - Indicate host not ready
197 * _ishtp_read_hdr() - Read message header
210 * _ishtp_read - Read message
234 * write_ipc_from_queue() - try to write ipc msg from Tx queue to device
237 * Check if DRBL is cleared. if it is - write the first IPC msg, then call
255 if (dev->dev_state == ISHTP_DEV_DISABLED) in write_ipc_from_queue()
256 return -EINVAL; in write_ipc_from_queue()
258 spin_lock_irqsave(&dev->wr_processing_spinlock, flags); in write_ipc_from_queue()
260 spin_unlock_irqrestore(&dev->wr_processing_spinlock, flags); in write_ipc_from_queue()
261 return -EBUSY; in write_ipc_from_queue()
265 * if tx send list is empty - return 0; in write_ipc_from_queue()
268 if (list_empty(&dev->wr_processing_list)) { in write_ipc_from_queue()
269 spin_unlock_irqrestore(&dev->wr_processing_spinlock, flags); in write_ipc_from_queue()
273 ipc_link = list_first_entry(&dev->wr_processing_list, in write_ipc_from_queue()
276 length = ipc_link->length - sizeof(uint32_t); in write_ipc_from_queue()
277 doorbell_val = *(uint32_t *)ipc_link->inline_data; in write_ipc_from_queue()
278 r_buf = (uint32_t *)(ipc_link->inline_data + sizeof(uint32_t)); in write_ipc_from_queue()
318 ++dev->ipc_tx_cnt; in write_ipc_from_queue()
319 dev->ipc_tx_bytes_cnt += IPC_HEADER_GET_LENGTH(doorbell_val); in write_ipc_from_queue()
321 ipc_send_compl = ipc_link->ipc_send_compl; in write_ipc_from_queue()
322 ipc_send_compl_prm = ipc_link->ipc_send_compl_prm; in write_ipc_from_queue()
323 list_del_init(&ipc_link->link); in write_ipc_from_queue()
324 list_add(&ipc_link->link, &dev->wr_free_list); in write_ipc_from_queue()
325 spin_unlock_irqrestore(&dev->wr_processing_spinlock, flags); in write_ipc_from_queue()
338 * write_ipc_to_queue() - write ipc msg to Tx queue
346 * Tx-to-write list then try to send the first IPC waiting msg
361 return -EMSGSIZE; in write_ipc_to_queue()
363 spin_lock_irqsave(&dev->wr_processing_spinlock, flags); in write_ipc_to_queue()
364 if (list_empty(&dev->wr_free_list)) { in write_ipc_to_queue()
365 spin_unlock_irqrestore(&dev->wr_processing_spinlock, flags); in write_ipc_to_queue()
366 return -ENOMEM; in write_ipc_to_queue()
368 ipc_link = list_first_entry(&dev->wr_free_list, in write_ipc_to_queue()
370 list_del_init(&ipc_link->link); in write_ipc_to_queue()
372 ipc_link->ipc_send_compl = ipc_send_compl; in write_ipc_to_queue()
373 ipc_link->ipc_send_compl_prm = ipc_send_compl_prm; in write_ipc_to_queue()
374 ipc_link->length = length; in write_ipc_to_queue()
375 memcpy(ipc_link->inline_data, msg, length); in write_ipc_to_queue()
377 list_add_tail(&ipc_link->link, &dev->wr_processing_list); in write_ipc_to_queue()
378 spin_unlock_irqrestore(&dev->wr_processing_spinlock, flags); in write_ipc_to_queue()
386 * ipc_send_mng_msg() - Send management message
412 * timed_wait_for_timeout() - wait special event with timeout
435 ret = -EINVAL; in timed_wait_for_timeout()
443 timeout -= (timeinc - left_time); in timed_wait_for_timeout()
450 ret = -EBUSY; in timed_wait_for_timeout()
462 * ish_fw_reset_handler() - FW reset handler
478 spin_lock_irqsave(&dev->wr_processing_spinlock, flags); in ish_fw_reset_handler()
479 list_splice_init(&dev->wr_processing_list, &dev->wr_free_list); in ish_fw_reset_handler()
480 spin_unlock_irqrestore(&dev->wr_processing_spinlock, flags); in ish_fw_reset_handler()
491 return -EPIPE; in ish_fw_reset_handler()
494 * RESET_NOTIFY_ACK - FW will be checking for it in ish_fw_reset_handler()
509 dev_err(dev->devc, in ish_fw_reset_handler()
510 "[ishtp-ish]: completed reset, ISH is dead (FWSTS = %08X)\n", in ish_fw_reset_handler()
512 return -ENODEV; in ish_fw_reset_handler()
520 * ish_fw_reset_work_fn() - FW reset worker function
531 /* ISH is ILUP & ISHTP-ready. Restart ISHTP */ in fw_reset_work_fn()
533 ishtp_dev->recvd_hw_ready = 1; in fw_reset_work_fn()
534 wake_up_interruptible(&ishtp_dev->wait_hw_ready); in fw_reset_work_fn()
539 dev_err(ishtp_dev->devc, "[ishtp-ish]: FW reset failed (%d)\n", in fw_reset_work_fn()
544 * _ish_sync_fw_clock() -Sync FW clock with the OS clock
547 * Sync FW and OS time
554 if (prev_sync && jiffies - prev_sync < 20 * HZ) in _ish_sync_fw_clock()
563 * recv_ipc() - Receive and process IPC management messages
582 if (dev->suspend_flag) { in recv_ipc()
583 dev->suspend_flag = 0; in recv_ipc()
584 wake_up_interruptible(&dev->suspend_wait); in recv_ipc()
586 if (dev->resume_flag) { in recv_ipc()
587 dev->resume_flag = 0; in recv_ipc()
588 wake_up_interruptible(&dev->resume_wait); in recv_ipc()
603 dev->recvd_hw_ready = 1; in recv_ipc()
604 wake_up_interruptible(&dev->wait_hw_ready); in recv_ipc()
610 * ish_irq_handler() - ISH IRQ handler
633 if (dev->dev_state == ISHTP_DEV_DISABLED) in ish_irq_handler()
638 dev_err(dev->devc, in ish_irq_handler()
639 "IPC hdr - bad length: %u; dropped\n", in ish_irq_handler()
657 ++dev->ipc_rx_cnt; in ish_irq_handler()
658 dev->ipc_rx_bytes_cnt += IPC_HEADER_GET_LENGTH(doorbell_val); in ish_irq_handler()
668 * ish_disable_dma() - disable dma communication between host and ISHFW
689 dev_err(dev->devc, in ish_disable_dma()
691 return -EBUSY; in ish_disable_dma()
698 * ish_wakeup() - wakeup ishfw from waiting-for-host state
702 * it wil wakeup FW from waiting-for-host state.
720 * _ish_hw_reset() - HW reset
729 struct pci_dev *pdev = dev->pdev; in _ish_hw_reset()
734 return -ENODEV; in _ish_hw_reset()
738 dev->dev_state = ISHTP_DEV_RESETTING; in _ish_hw_reset()
740 if (!pdev->pm_cap) { in _ish_hw_reset()
741 dev_err(&pdev->dev, "Can't reset - no PM caps\n"); in _ish_hw_reset()
742 return -EINVAL; in _ish_hw_reset()
747 dev_err(&pdev->dev, in _ish_hw_reset()
748 "Can't reset - stuck with DMA in-progress\n"); in _ish_hw_reset()
749 return -EBUSY; in _ish_hw_reset()
752 pci_read_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, &csr); in _ish_hw_reset()
756 pci_write_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, csr); in _ish_hw_reset()
758 mdelay(pdev->d3hot_delay); in _ish_hw_reset()
762 pci_write_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, csr); in _ish_hw_reset()
771 * _ish_ipc_reset() - IPC reset
793 dev->recvd_hw_ready = 0; in _ish_ipc_reset()
799 dev_err(dev->devc, "Failed to send IPC MNG_RESET_NOTIFY\n"); in _ish_ipc_reset()
803 wait_event_interruptible_timeout(dev->wait_hw_ready, in _ish_ipc_reset()
804 dev->recvd_hw_ready, 2 * HZ); in _ish_ipc_reset()
805 if (!dev->recvd_hw_ready) { in _ish_ipc_reset()
806 dev_err(dev->devc, "Timed out waiting for HW ready\n"); in _ish_ipc_reset()
807 rv = -ENODEV; in _ish_ipc_reset()
814 * ish_hw_start() -Start ISH HW
830 /* wait for FW-initiated reset flow */ in ish_hw_start()
831 if (!dev->recvd_hw_ready) in ish_hw_start()
832 wait_event_interruptible_timeout(dev->wait_hw_ready, in ish_hw_start()
833 dev->recvd_hw_ready, in ish_hw_start()
836 if (!dev->recvd_hw_ready) { in ish_hw_start()
837 dev_err(dev->devc, in ish_hw_start()
838 "[ishtp-ish]: Timed out waiting for FW-initiated reset\n"); in ish_hw_start()
839 return -ENODEV; in ish_hw_start()
846 * ish_ipc_get_header() -Get doorbell value
877 * ish_dev_init() -Initialize ISH devoce
889 dev = devm_kzalloc(&pdev->dev, in ish_dev_init()
897 init_waitqueue_head(&dev->wait_hw_ready); in ish_dev_init()
899 spin_lock_init(&dev->wr_processing_spinlock); in ish_dev_init()
902 INIT_LIST_HEAD(&dev->wr_processing_list); in ish_dev_init()
903 INIT_LIST_HEAD(&dev->wr_free_list); in ish_dev_init()
907 tx_buf = devm_kzalloc(&pdev->dev, in ish_dev_init()
913 * at all - although this shouldn't happen in ish_dev_init()
915 dev_err(dev->devc, in ish_dev_init()
916 "[ishtp-ish]: failure in Tx FIFO allocations (%d)\n", in ish_dev_init()
920 list_add_tail(&tx_buf->link, &dev->wr_free_list); in ish_dev_init()
923 dev->ops = &ish_hw_ops; in ish_dev_init()
924 dev->devc = &pdev->dev; in ish_dev_init()
925 dev->mtu = IPC_PAYLOAD_SIZE - sizeof(struct ishtp_msg_hdr); in ish_dev_init()
930 * ish_device_disable() - Disable ISH device
937 struct pci_dev *pdev = dev->pdev; in ish_device_disable()
944 dev_err(&pdev->dev, in ish_device_disable()
945 "Can't reset - stuck with DMA in-progress\n"); in ish_device_disable()
952 dev->dev_state = ISHTP_DEV_DISABLED; in ish_device_disable()