604 lines
18 KiB
C
604 lines
18 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only
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*
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* Copyright (C) 2020-21 Intel Corporation.
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*/
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#ifndef IOSM_IPC_IMEM_H
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#define IOSM_IPC_IMEM_H
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#include <linux/skbuff.h>
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#include "iosm_ipc_mmio.h"
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#include "iosm_ipc_pcie.h"
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#include "iosm_ipc_uevent.h"
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#include "iosm_ipc_wwan.h"
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#include "iosm_ipc_task_queue.h"
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struct ipc_chnl_cfg;
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/* IRQ moderation in usec */
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#define IRQ_MOD_OFF 0
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#define IRQ_MOD_NET 1000
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#define IRQ_MOD_TRC 4000
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/* Either the PSI image is accepted by CP or the suspended flash tool is waken,
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* informed that the CP ROM driver is not ready to process the PSI image.
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* unit : milliseconds
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*/
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#define IPC_PSI_TRANSFER_TIMEOUT 3000
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/* Timeout in 20 msec to wait for the modem to boot up to
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* IPC_MEM_DEVICE_IPC_INIT state.
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* unit : milliseconds (500 * ipc_util_msleep(20))
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*/
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#define IPC_MODEM_BOOT_TIMEOUT 500
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/* Wait timeout for ipc status reflects IPC_MEM_DEVICE_IPC_UNINIT
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* unit : milliseconds
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*/
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#define IPC_MODEM_UNINIT_TIMEOUT_MS 30
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/* Pending time for processing data.
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* unit : milliseconds
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*/
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#define IPC_PEND_DATA_TIMEOUT 500
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/* The timeout in milliseconds for application to wait for remote time. */
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#define IPC_REMOTE_TS_TIMEOUT_MS 10
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/* Timeout for TD allocation retry.
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* unit : milliseconds
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*/
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#define IPC_TD_ALLOC_TIMER_PERIOD_MS 100
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/* Host sleep target is host */
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#define IPC_HOST_SLEEP_HOST 0
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/* Host sleep target is device */
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#define IPC_HOST_SLEEP_DEVICE 1
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/* Sleep message, target host: AP enters sleep / target device: CP is
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* allowed to enter sleep and shall use the host sleep protocol
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*/
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#define IPC_HOST_SLEEP_ENTER_SLEEP 0
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/* Sleep_message, target host: AP exits sleep / target device: CP is
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* NOT allowed to enter sleep
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*/
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#define IPC_HOST_SLEEP_EXIT_SLEEP 1
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#define IMEM_IRQ_DONT_CARE (-1)
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#define IPC_MEM_MAX_CHANNELS 8
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#define IPC_MEM_MUX_IP_SESSION_ENTRIES 8
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#define IPC_MEM_MUX_IP_CH_IF_ID 0
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#define TD_UPDATE_DEFAULT_TIMEOUT_USEC 1900
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#define FORCE_UPDATE_DEFAULT_TIMEOUT_USEC 500
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/* Sleep_message, target host: not applicable / target device: CP is
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* allowed to enter sleep and shall NOT use the device sleep protocol
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*/
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#define IPC_HOST_SLEEP_ENTER_SLEEP_NO_PROTOCOL 2
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/* in_band_crash_signal IPC_MEM_INBAND_CRASH_SIG
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* Modem crash notification configuration. If this value is non-zero then
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* FEATURE_SET message will be sent to the Modem as a result the Modem will
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* signal Crash via Execution Stage register. If this value is zero then Modem
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* will use out-of-band method to notify about it's Crash.
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*/
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#define IPC_MEM_INBAND_CRASH_SIG 1
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/* Extra headroom to be allocated for DL SKBs to allow addition of Ethernet
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* header
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*/
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#define IPC_MEM_DL_ETH_OFFSET 16
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#define IPC_CB(skb) ((struct ipc_skb_cb *)((skb)->cb))
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#define IOSM_CHIP_INFO_SIZE_MAX 100
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#define FULLY_FUNCTIONAL 0
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#define IOSM_DEVLINK_INIT 1
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/* List of the supported UL/DL pipes. */
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enum ipc_mem_pipes {
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IPC_MEM_PIPE_0 = 0,
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IPC_MEM_PIPE_1,
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IPC_MEM_PIPE_2,
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IPC_MEM_PIPE_3,
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IPC_MEM_PIPE_4,
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IPC_MEM_PIPE_5,
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IPC_MEM_PIPE_6,
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IPC_MEM_PIPE_7,
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IPC_MEM_PIPE_8,
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IPC_MEM_PIPE_9,
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IPC_MEM_PIPE_10,
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IPC_MEM_PIPE_11,
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IPC_MEM_PIPE_12,
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IPC_MEM_PIPE_13,
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IPC_MEM_PIPE_14,
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IPC_MEM_PIPE_15,
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IPC_MEM_PIPE_16,
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IPC_MEM_PIPE_17,
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IPC_MEM_PIPE_18,
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IPC_MEM_PIPE_19,
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IPC_MEM_PIPE_20,
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IPC_MEM_PIPE_21,
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IPC_MEM_PIPE_22,
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IPC_MEM_PIPE_23,
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IPC_MEM_MAX_PIPES
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};
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/* Enum defining channel states. */
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enum ipc_channel_state {
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IMEM_CHANNEL_FREE,
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IMEM_CHANNEL_RESERVED,
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IMEM_CHANNEL_ACTIVE,
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IMEM_CHANNEL_CLOSING,
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};
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/* Time Unit */
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enum ipc_time_unit {
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IPC_SEC = 0,
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IPC_MILLI_SEC = 1,
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IPC_MICRO_SEC = 2,
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IPC_NANO_SEC = 3,
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IPC_PICO_SEC = 4,
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IPC_FEMTO_SEC = 5,
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IPC_ATTO_SEC = 6,
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};
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/**
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* enum ipc_ctype - Enum defining supported channel type needed for control
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* /IP traffic.
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* @IPC_CTYPE_WWAN: Used for IP traffic
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* @IPC_CTYPE_CTRL: Used for Control Communication
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*/
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enum ipc_ctype {
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IPC_CTYPE_WWAN,
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IPC_CTYPE_CTRL,
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};
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/* Pipe direction. */
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enum ipc_mem_pipe_dir {
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IPC_MEM_DIR_UL,
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IPC_MEM_DIR_DL,
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};
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/* HP update identifier. To be used as data for ipc_cp_irq_hpda_update() */
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enum ipc_hp_identifier {
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IPC_HP_MR = 0,
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IPC_HP_PM_TRIGGER,
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IPC_HP_WAKEUP_SPEC_TMR,
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IPC_HP_TD_UPD_TMR_START,
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IPC_HP_TD_UPD_TMR,
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IPC_HP_FAST_TD_UPD_TMR,
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IPC_HP_UL_WRITE_TD,
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IPC_HP_DL_PROCESS,
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IPC_HP_NET_CHANNEL_INIT,
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IPC_HP_CDEV_OPEN,
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};
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/**
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* struct ipc_pipe - Structure for Pipe.
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* @tdr_start: Ipc private protocol Transfer Descriptor Ring
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* @channel: Id of the sio device, set by imem_sio_open,
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* needed to pass DL char to the user terminal
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* @skbr_start: Circular buffer for skbuf and the buffer
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* reference in a tdr_start entry.
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* @phy_tdr_start: Transfer descriptor start address
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* @old_head: last head pointer reported to CP.
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* @old_tail: AP read position before CP moves the read
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* position to write/head. If CP has consumed the
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* buffers, AP has to freed the skbuf starting at
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* tdr_start[old_tail].
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* @nr_of_entries: Number of elements of skb_start and tdr_start.
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* @max_nr_of_queued_entries: Maximum number of queued entries in TDR
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* @accumulation_backoff: Accumulation in usec for accumulation
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* backoff (0 = no acc backoff)
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* @irq_moderation: timer in usec for irq_moderation
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* (0=no irq moderation)
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* @pipe_nr: Pipe identification number
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* @irq: Interrupt vector
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* @dir: Direction of data stream in pipe
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* @td_tag: Unique tag of the buffer queued
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* @buf_size: Buffer size (in bytes) for preallocated
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* buffers (for DL pipes)
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* @nr_of_queued_entries: Aueued number of entries
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* @is_open: Check for open pipe status
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*/
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struct ipc_pipe {
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struct ipc_protocol_td *tdr_start;
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struct ipc_mem_channel *channel;
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struct sk_buff **skbr_start;
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dma_addr_t phy_tdr_start;
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u32 old_head;
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u32 old_tail;
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u32 nr_of_entries;
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u32 max_nr_of_queued_entries;
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u32 accumulation_backoff;
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u32 irq_moderation;
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u32 pipe_nr;
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u32 irq;
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enum ipc_mem_pipe_dir dir;
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u32 td_tag;
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u32 buf_size;
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u16 nr_of_queued_entries;
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u8 is_open:1;
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};
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/**
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* struct ipc_mem_channel - Structure for Channel.
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* @channel_id: Instance of the channel list and is return to the user
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* at the end of the open operation.
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* @ctype: Control or netif channel.
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* @index: unique index per ctype
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* @ul_pipe: pipe objects
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* @dl_pipe: pipe objects
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* @if_id: Interface ID
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* @net_err_count: Number of downlink errors returned by ipc_wwan_receive
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* interface at the entry point of the IP stack.
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* @state: Free, reserved or busy (in use).
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* @ul_sem: Needed for the blocking write or uplink transfer.
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* @ul_list: Uplink accumulator which is filled by the uplink
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* char app or IP stack. The socket buffer pointer are
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* added to the descriptor list in the kthread context.
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*/
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struct ipc_mem_channel {
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int channel_id;
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enum ipc_ctype ctype;
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int index;
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struct ipc_pipe ul_pipe;
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struct ipc_pipe dl_pipe;
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int if_id;
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u32 net_err_count;
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enum ipc_channel_state state;
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struct completion ul_sem;
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struct sk_buff_head ul_list;
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};
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/**
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* enum ipc_phase - Different AP and CP phases.
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* The enums defined after "IPC_P_ROM" and before
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* "IPC_P_RUN" indicates the operating state where CP can
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* respond to any requests. So while introducing new phase
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* this shall be taken into consideration.
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* @IPC_P_OFF: On host PC, the PCIe device link settings are known
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* about the combined power on. PC is running, the driver
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* is loaded and CP is in power off mode. The PCIe bus
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* driver call the device power mode D3hot. In this phase
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* the driver the polls the device, until the device is in
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* the power on state and signals the power mode D0.
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* @IPC_P_OFF_REQ: The intermediate phase between cleanup activity starts
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* and ends.
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* @IPC_P_CRASH: The phase indicating CP crash
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* @IPC_P_CD_READY: The phase indicating CP core dump is ready
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* @IPC_P_ROM: After power on, CP starts in ROM mode and the IPC ROM
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* driver is waiting 150 ms for the AP active notification
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* saved in the PCI link status register.
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* @IPC_P_PSI: Primary signed image download phase
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* @IPC_P_EBL: Extended bootloader pahse
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* @IPC_P_RUN: The phase after flashing to RAM is the RUNTIME phase.
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*/
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enum ipc_phase {
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IPC_P_OFF,
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IPC_P_OFF_REQ,
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IPC_P_CRASH,
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IPC_P_CD_READY,
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IPC_P_ROM,
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IPC_P_PSI,
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IPC_P_EBL,
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IPC_P_RUN,
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};
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/**
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* struct iosm_imem - Current state of the IPC shared memory.
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* @mmio: mmio instance to access CP MMIO area /
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* doorbell scratchpad.
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* @ipc_protocol: IPC Protocol instance
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* @ipc_task: Task for entry into ipc task queue
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* @wwan: WWAN device pointer
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* @mux: IP Data multiplexing state.
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* @sio: IPC SIO data structure pointer
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* @ipc_port: IPC PORT data structure pointer
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* @pcie: IPC PCIe
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* @trace: IPC trace data structure pointer
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* @dev: Pointer to device structure
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* @ipc_requested_state: Expected IPC state on CP.
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* @channels: Channel list with UL/DL pipe pairs.
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* @ipc_devlink: IPC Devlink data structure pointer
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* @ipc_status: local ipc_status
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* @nr_of_channels: number of configured channels
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* @startup_timer: startup timer for NAND support.
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* @hrtimer_period: Hr timer period
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* @tdupdate_timer: Delay the TD update doorbell.
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* @fast_update_timer: forced head pointer update delay timer.
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* @td_alloc_timer: Timer for DL pipe TD allocation retry
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* @adb_timer: Timer for finishing the ADB.
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* @rom_exit_code: Mapped boot rom exit code.
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* @enter_runtime: 1 means the transition to runtime phase was
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* executed.
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* @ul_pend_sem: Semaphore to wait/complete of UL TDs
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* before closing pipe.
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* @app_notify_ul_pend: Signal app if UL TD is pending
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* @dl_pend_sem: Semaphore to wait/complete of DL TDs
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* before closing pipe.
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* @app_notify_dl_pend: Signal app if DL TD is pending
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* @phase: Operating phase like runtime.
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* @pci_device_id: Device ID
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* @cp_version: CP version
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* @device_sleep: Device sleep state
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* @run_state_worker: Pointer to worker component for device
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* setup operations to be called when modem
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* reaches RUN state
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* @ev_irq_pending: 0 means inform the IPC tasklet to
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* process the irq actions.
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* @flag: Flag to monitor the state of driver
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* @td_update_timer_suspended: if true then td update timer suspend
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* @ev_mux_net_transmit_pending:0 means inform the IPC tasklet to pass
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* @reset_det_n: Reset detect flag
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* @pcie_wake_n: Pcie wake flag
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* @debugfs_wwan_dir: WWAN Debug FS directory entry
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* @debugfs_dir: Debug FS directory for driver-specific entries
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*/
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struct iosm_imem {
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struct iosm_mmio *mmio;
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struct iosm_protocol *ipc_protocol;
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struct ipc_task *ipc_task;
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struct iosm_wwan *wwan;
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struct iosm_mux *mux;
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struct iosm_cdev *ipc_port[IPC_MEM_MAX_CHANNELS];
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struct iosm_pcie *pcie;
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#ifdef CONFIG_WWAN_DEBUGFS
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struct iosm_trace *trace;
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#endif
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struct device *dev;
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enum ipc_mem_device_ipc_state ipc_requested_state;
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struct ipc_mem_channel channels[IPC_MEM_MAX_CHANNELS];
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struct iosm_devlink *ipc_devlink;
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u32 ipc_status;
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u32 nr_of_channels;
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struct hrtimer startup_timer;
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ktime_t hrtimer_period;
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struct hrtimer tdupdate_timer;
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struct hrtimer fast_update_timer;
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struct hrtimer td_alloc_timer;
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struct hrtimer adb_timer;
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enum rom_exit_code rom_exit_code;
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u32 enter_runtime;
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struct completion ul_pend_sem;
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u32 app_notify_ul_pend;
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struct completion dl_pend_sem;
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u32 app_notify_dl_pend;
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enum ipc_phase phase;
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u16 pci_device_id;
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int cp_version;
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int device_sleep;
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struct work_struct run_state_worker;
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u8 ev_irq_pending[IPC_IRQ_VECTORS];
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unsigned long flag;
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u8 td_update_timer_suspended:1,
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ev_mux_net_transmit_pending:1,
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reset_det_n:1,
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pcie_wake_n:1;
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#ifdef CONFIG_WWAN_DEBUGFS
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struct dentry *debugfs_wwan_dir;
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struct dentry *debugfs_dir;
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#endif
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};
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/**
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* ipc_imem_init - Initialize the shared memory region
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* @pcie: Pointer to core driver data-struct
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* @device_id: PCI device ID
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* @mmio: Pointer to the mmio area
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* @dev: Pointer to device structure
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*
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* Returns: Initialized imem pointer on success else NULL
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*/
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struct iosm_imem *ipc_imem_init(struct iosm_pcie *pcie, unsigned int device_id,
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void __iomem *mmio, struct device *dev);
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/**
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* ipc_imem_pm_s2idle_sleep - Set PM variables to sleep/active for
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* s2idle sleep/active
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* @ipc_imem: Pointer to imem data-struct
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* @sleep: Set PM Variable to sleep/active
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*/
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void ipc_imem_pm_s2idle_sleep(struct iosm_imem *ipc_imem, bool sleep);
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/**
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* ipc_imem_pm_suspend - The HAL shall ask the shared memory layer
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* whether D3 is allowed.
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* @ipc_imem: Pointer to imem data-struct
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*/
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void ipc_imem_pm_suspend(struct iosm_imem *ipc_imem);
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/**
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* ipc_imem_pm_resume - The HAL shall inform the shared memory layer
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* that the device is active.
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* @ipc_imem: Pointer to imem data-struct
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*/
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void ipc_imem_pm_resume(struct iosm_imem *ipc_imem);
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/**
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* ipc_imem_cleanup - Inform CP and free the shared memory resources.
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* @ipc_imem: Pointer to imem data-struct
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*/
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void ipc_imem_cleanup(struct iosm_imem *ipc_imem);
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/**
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* ipc_imem_irq_process - Shift the IRQ actions to the IPC thread.
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* @ipc_imem: Pointer to imem data-struct
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* @irq: Irq number
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*/
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void ipc_imem_irq_process(struct iosm_imem *ipc_imem, int irq);
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/**
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* imem_get_device_sleep_state - Get the device sleep state value.
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* @ipc_imem: Pointer to imem instance
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*
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* Returns: device sleep state
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*/
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int imem_get_device_sleep_state(struct iosm_imem *ipc_imem);
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/**
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* ipc_imem_td_update_timer_suspend - Updates the TD Update Timer suspend flag.
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* @ipc_imem: Pointer to imem data-struct
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* @suspend: Flag to update. If TRUE then HP update doorbell is triggered to
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* device without any wait. If FALSE then HP update doorbell is
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* delayed until timeout.
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*/
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void ipc_imem_td_update_timer_suspend(struct iosm_imem *ipc_imem, bool suspend);
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/**
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* ipc_imem_channel_close - Release the channel resources.
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* @ipc_imem: Pointer to imem data-struct
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* @channel_id: Channel ID to be cleaned up.
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*/
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void ipc_imem_channel_close(struct iosm_imem *ipc_imem, int channel_id);
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/**
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* ipc_imem_channel_alloc - Reserves a channel
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* @ipc_imem: Pointer to imem data-struct
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* @index: ID to lookup from the preallocated list.
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* @ctype: Channel type.
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*
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* Returns: Index on success and failure value on error
|
|
*/
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int ipc_imem_channel_alloc(struct iosm_imem *ipc_imem, int index,
|
|
enum ipc_ctype ctype);
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|
|
|
/**
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* ipc_imem_channel_open - Establish the pipes.
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* @ipc_imem: Pointer to imem data-struct
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* @channel_id: Channel ID returned during alloc.
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* @db_id: Doorbell ID for trigger identifier.
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|
*
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* Returns: Pointer of ipc_mem_channel on success and NULL on failure.
|
|
*/
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struct ipc_mem_channel *ipc_imem_channel_open(struct iosm_imem *ipc_imem,
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int channel_id, u32 db_id);
|
|
|
|
/**
|
|
* ipc_imem_td_update_timer_start - Starts the TD Update Timer if not running.
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* @ipc_imem: Pointer to imem data-struct
|
|
*/
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|
void ipc_imem_td_update_timer_start(struct iosm_imem *ipc_imem);
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|
|
|
/**
|
|
* ipc_imem_ul_write_td - Pass the channel UL list to protocol layer for TD
|
|
* preparation and sending them to the device.
|
|
* @ipc_imem: Pointer to imem data-struct
|
|
*
|
|
* Returns: TRUE of HP Doorbell trigger is pending. FALSE otherwise.
|
|
*/
|
|
bool ipc_imem_ul_write_td(struct iosm_imem *ipc_imem);
|
|
|
|
/**
|
|
* ipc_imem_ul_send - Dequeue SKB from channel list and start with
|
|
* the uplink transfer.If HP Doorbell is pending to be
|
|
* triggered then starts the TD Update Timer.
|
|
* @ipc_imem: Pointer to imem data-struct
|
|
*/
|
|
void ipc_imem_ul_send(struct iosm_imem *ipc_imem);
|
|
|
|
/**
|
|
* ipc_imem_channel_update - Set or modify pipe config of an existing channel
|
|
* @ipc_imem: Pointer to imem data-struct
|
|
* @id: Channel config index
|
|
* @chnl_cfg: Channel config struct
|
|
* @irq_moderation: Timer in usec for irq_moderation
|
|
*/
|
|
void ipc_imem_channel_update(struct iosm_imem *ipc_imem, int id,
|
|
struct ipc_chnl_cfg chnl_cfg, u32 irq_moderation);
|
|
|
|
/**
|
|
* ipc_imem_channel_free -Free an IPC channel.
|
|
* @channel: Channel to be freed
|
|
*/
|
|
void ipc_imem_channel_free(struct ipc_mem_channel *channel);
|
|
|
|
/**
|
|
* ipc_imem_hrtimer_stop - Stop the hrtimer
|
|
* @hr_timer: Pointer to hrtimer instance
|
|
*/
|
|
void ipc_imem_hrtimer_stop(struct hrtimer *hr_timer);
|
|
|
|
/**
|
|
* ipc_imem_pipe_cleanup - Reset volatile pipe content for all channels
|
|
* @ipc_imem: Pointer to imem data-struct
|
|
* @pipe: Pipe to cleaned up
|
|
*/
|
|
void ipc_imem_pipe_cleanup(struct iosm_imem *ipc_imem, struct ipc_pipe *pipe);
|
|
|
|
/**
|
|
* ipc_imem_pipe_close - Send msg to device to close pipe
|
|
* @ipc_imem: Pointer to imem data-struct
|
|
* @pipe: Pipe to be closed
|
|
*/
|
|
void ipc_imem_pipe_close(struct iosm_imem *ipc_imem, struct ipc_pipe *pipe);
|
|
|
|
/**
|
|
* ipc_imem_phase_update - Get the CP execution state
|
|
* and map it to the AP phase.
|
|
* @ipc_imem: Pointer to imem data-struct
|
|
*
|
|
* Returns: Current ap updated phase
|
|
*/
|
|
enum ipc_phase ipc_imem_phase_update(struct iosm_imem *ipc_imem);
|
|
|
|
/**
|
|
* ipc_imem_phase_get_string - Return the current operation
|
|
* phase as string.
|
|
* @phase: AP phase
|
|
*
|
|
* Returns: AP phase string
|
|
*/
|
|
const char *ipc_imem_phase_get_string(enum ipc_phase phase);
|
|
|
|
/**
|
|
* ipc_imem_msg_send_feature_set - Send feature set message to modem
|
|
* @ipc_imem: Pointer to imem data-struct
|
|
* @reset_enable: 0 = out-of-band, 1 = in-band-crash notification
|
|
* @atomic_ctx: if disabled call in tasklet context
|
|
*
|
|
*/
|
|
void ipc_imem_msg_send_feature_set(struct iosm_imem *ipc_imem,
|
|
unsigned int reset_enable, bool atomic_ctx);
|
|
|
|
/**
|
|
* ipc_imem_ipc_init_check - Send the init event to CP, wait a certain time and
|
|
* set CP to runtime with the context information
|
|
* @ipc_imem: Pointer to imem data-struct
|
|
*/
|
|
void ipc_imem_ipc_init_check(struct iosm_imem *ipc_imem);
|
|
|
|
/**
|
|
* ipc_imem_channel_init - Initialize the channel list with UL/DL pipe pairs.
|
|
* @ipc_imem: Pointer to imem data-struct
|
|
* @ctype: Channel type
|
|
* @chnl_cfg: Channel configuration struct
|
|
* @irq_moderation: Timer in usec for irq_moderation
|
|
*/
|
|
void ipc_imem_channel_init(struct iosm_imem *ipc_imem, enum ipc_ctype ctype,
|
|
struct ipc_chnl_cfg chnl_cfg, u32 irq_moderation);
|
|
|
|
/**
|
|
* ipc_imem_devlink_trigger_chip_info - Inform devlink that the chip
|
|
* information are available if the
|
|
* flashing to RAM interworking shall be
|
|
* executed.
|
|
* @ipc_imem: Pointer to imem structure
|
|
*
|
|
* Returns: 0 on success, -1 on failure
|
|
*/
|
|
int ipc_imem_devlink_trigger_chip_info(struct iosm_imem *ipc_imem);
|
|
|
|
void ipc_imem_adb_timer_start(struct iosm_imem *ipc_imem);
|
|
|
|
#endif
|