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linux/drivers/bus/mhi/common.h
Krishna chaitanya chundru ceeb64f41f bus: mhi: host: Add tracing support 
This change adds ftrace support for following functions which
helps in debugging the issues when there is Channel state & MHI
state change and also when we receive data and control events:
1. mhi_intvec_mhi_states
2. mhi_process_data_event_ring
3. mhi_process_ctrl_ev_ring
4. mhi_gen_tre
5. mhi_update_channel_state
6. mhi_tryset_pm_state
7. mhi_pm_st_worker

Change the implementation of the arrays which has enum to strings mapping
to make it consistent in both trace header file and other files.

Where ever the trace events are added, debug messages are removed.

Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20240206-ftrace_support-v11-1-3f71dc187544@quicinc.com
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2024-02-06 11:54:44 +05:30

327 lines
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2022, Linaro Ltd.
*
*/
#ifndef _MHI_COMMON_H
#define _MHI_COMMON_H
#include <linux/bitfield.h>
#include <linux/mhi.h>
/* MHI registers */
#define MHIREGLEN 0x00
#define MHIVER 0x08
#define MHICFG 0x10
#define CHDBOFF 0x18
#define ERDBOFF 0x20
#define BHIOFF 0x28
#define BHIEOFF 0x2c
#define DEBUGOFF 0x30
#define MHICTRL 0x38
#define MHISTATUS 0x48
#define CCABAP_LOWER 0x58
#define CCABAP_HIGHER 0x5c
#define ECABAP_LOWER 0x60
#define ECABAP_HIGHER 0x64
#define CRCBAP_LOWER 0x68
#define CRCBAP_HIGHER 0x6c
#define CRDB_LOWER 0x70
#define CRDB_HIGHER 0x74
#define MHICTRLBASE_LOWER 0x80
#define MHICTRLBASE_HIGHER 0x84
#define MHICTRLLIMIT_LOWER 0x88
#define MHICTRLLIMIT_HIGHER 0x8c
#define MHIDATABASE_LOWER 0x98
#define MHIDATABASE_HIGHER 0x9c
#define MHIDATALIMIT_LOWER 0xa0
#define MHIDATALIMIT_HIGHER 0xa4
/* MHI BHI registers */
#define BHI_BHIVERSION_MINOR 0x00
#define BHI_BHIVERSION_MAJOR 0x04
#define BHI_IMGADDR_LOW 0x08
#define BHI_IMGADDR_HIGH 0x0c
#define BHI_IMGSIZE 0x10
#define BHI_RSVD1 0x14
#define BHI_IMGTXDB 0x18
#define BHI_RSVD2 0x1c
#define BHI_INTVEC 0x20
#define BHI_RSVD3 0x24
#define BHI_EXECENV 0x28
#define BHI_STATUS 0x2c
#define BHI_ERRCODE 0x30
#define BHI_ERRDBG1 0x34
#define BHI_ERRDBG2 0x38
#define BHI_ERRDBG3 0x3c
#define BHI_SERIALNU 0x40
#define BHI_SBLANTIROLLVER 0x44
#define BHI_NUMSEG 0x48
#define BHI_MSMHWID(n) (0x4c + (0x4 * (n)))
#define BHI_OEMPKHASH(n) (0x64 + (0x4 * (n)))
#define BHI_RSVD5 0xc4
/* BHI register bits */
#define BHI_TXDB_SEQNUM_BMSK GENMASK(29, 0)
#define BHI_TXDB_SEQNUM_SHFT 0
#define BHI_STATUS_MASK GENMASK(31, 30)
#define BHI_STATUS_ERROR 0x03
#define BHI_STATUS_SUCCESS 0x02
#define BHI_STATUS_RESET 0x00
/* MHI BHIE registers */
#define BHIE_MSMSOCID_OFFS 0x00
#define BHIE_TXVECADDR_LOW_OFFS 0x2c
#define BHIE_TXVECADDR_HIGH_OFFS 0x30
#define BHIE_TXVECSIZE_OFFS 0x34
#define BHIE_TXVECDB_OFFS 0x3c
#define BHIE_TXVECSTATUS_OFFS 0x44
#define BHIE_RXVECADDR_LOW_OFFS 0x60
#define BHIE_RXVECADDR_HIGH_OFFS 0x64
#define BHIE_RXVECSIZE_OFFS 0x68
#define BHIE_RXVECDB_OFFS 0x70
#define BHIE_RXVECSTATUS_OFFS 0x78
/* BHIE register bits */
#define BHIE_TXVECDB_SEQNUM_BMSK GENMASK(29, 0)
#define BHIE_TXVECDB_SEQNUM_SHFT 0
#define BHIE_TXVECSTATUS_SEQNUM_BMSK GENMASK(29, 0)
#define BHIE_TXVECSTATUS_SEQNUM_SHFT 0
#define BHIE_TXVECSTATUS_STATUS_BMSK GENMASK(31, 30)
#define BHIE_TXVECSTATUS_STATUS_SHFT 30
#define BHIE_TXVECSTATUS_STATUS_RESET 0x00
#define BHIE_TXVECSTATUS_STATUS_XFER_COMPL 0x02
#define BHIE_TXVECSTATUS_STATUS_ERROR 0x03
#define BHIE_RXVECDB_SEQNUM_BMSK GENMASK(29, 0)
#define BHIE_RXVECDB_SEQNUM_SHFT 0
#define BHIE_RXVECSTATUS_SEQNUM_BMSK GENMASK(29, 0)
#define BHIE_RXVECSTATUS_SEQNUM_SHFT 0
#define BHIE_RXVECSTATUS_STATUS_BMSK GENMASK(31, 30)
#define BHIE_RXVECSTATUS_STATUS_SHFT 30
#define BHIE_RXVECSTATUS_STATUS_RESET 0x00
#define BHIE_RXVECSTATUS_STATUS_XFER_COMPL 0x02
#define BHIE_RXVECSTATUS_STATUS_ERROR 0x03
/* MHI register bits */
#define MHICFG_NHWER_MASK GENMASK(31, 24)
#define MHICFG_NER_MASK GENMASK(23, 16)
#define MHICFG_NHWCH_MASK GENMASK(15, 8)
#define MHICFG_NCH_MASK GENMASK(7, 0)
#define MHICTRL_MHISTATE_MASK GENMASK(15, 8)
#define MHICTRL_RESET_MASK BIT(1)
#define MHISTATUS_MHISTATE_MASK GENMASK(15, 8)
#define MHISTATUS_SYSERR_MASK BIT(2)
#define MHISTATUS_READY_MASK BIT(0)
/* Command Ring Element macros */
/* No operation command */
#define MHI_TRE_CMD_NOOP_PTR 0
#define MHI_TRE_CMD_NOOP_DWORD0 0
#define MHI_TRE_CMD_NOOP_DWORD1 cpu_to_le32(FIELD_PREP(GENMASK(23, 16), MHI_CMD_NOP))
/* Channel reset command */
#define MHI_TRE_CMD_RESET_PTR 0
#define MHI_TRE_CMD_RESET_DWORD0 0
#define MHI_TRE_CMD_RESET_DWORD1(chid) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), chid) | \
FIELD_PREP(GENMASK(23, 16), \
MHI_CMD_RESET_CHAN))
/* Channel stop command */
#define MHI_TRE_CMD_STOP_PTR 0
#define MHI_TRE_CMD_STOP_DWORD0 0
#define MHI_TRE_CMD_STOP_DWORD1(chid) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), chid) | \
FIELD_PREP(GENMASK(23, 16), \
MHI_CMD_STOP_CHAN))
/* Channel start command */
#define MHI_TRE_CMD_START_PTR 0
#define MHI_TRE_CMD_START_DWORD0 0
#define MHI_TRE_CMD_START_DWORD1(chid) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), chid) | \
FIELD_PREP(GENMASK(23, 16), \
MHI_CMD_START_CHAN))
#define MHI_TRE_GET_DWORD(tre, word) le32_to_cpu((tre)->dword[(word)])
#define MHI_TRE_GET_CMD_CHID(tre) FIELD_GET(GENMASK(31, 24), MHI_TRE_GET_DWORD(tre, 1))
#define MHI_TRE_GET_CMD_TYPE(tre) FIELD_GET(GENMASK(23, 16), MHI_TRE_GET_DWORD(tre, 1))
/* Event descriptor macros */
#define MHI_TRE_EV_PTR(ptr) cpu_to_le64(ptr)
#define MHI_TRE_EV_DWORD0(code, len) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), code) | \
FIELD_PREP(GENMASK(15, 0), len))
#define MHI_TRE_EV_DWORD1(chid, type) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), chid) | \
FIELD_PREP(GENMASK(23, 16), type))
#define MHI_TRE_GET_EV_PTR(tre) le64_to_cpu((tre)->ptr)
#define MHI_TRE_GET_EV_CODE(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 0)))
#define MHI_TRE_GET_EV_LEN(tre) FIELD_GET(GENMASK(15, 0), (MHI_TRE_GET_DWORD(tre, 0)))
#define MHI_TRE_GET_EV_CHID(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 1)))
#define MHI_TRE_GET_EV_TYPE(tre) FIELD_GET(GENMASK(23, 16), (MHI_TRE_GET_DWORD(tre, 1)))
#define MHI_TRE_GET_EV_STATE(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 0)))
#define MHI_TRE_GET_EV_EXECENV(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 0)))
#define MHI_TRE_GET_EV_SEQ(tre) MHI_TRE_GET_DWORD(tre, 0)
#define MHI_TRE_GET_EV_TIME(tre) MHI_TRE_GET_EV_PTR(tre)
#define MHI_TRE_GET_EV_COOKIE(tre) lower_32_bits(MHI_TRE_GET_EV_PTR(tre))
#define MHI_TRE_GET_EV_VEID(tre) FIELD_GET(GENMASK(23, 16), (MHI_TRE_GET_DWORD(tre, 0)))
#define MHI_TRE_GET_EV_LINKSPEED(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 1)))
#define MHI_TRE_GET_EV_LINKWIDTH(tre) FIELD_GET(GENMASK(7, 0), (MHI_TRE_GET_DWORD(tre, 0)))
/* State change event */
#define MHI_SC_EV_PTR 0
#define MHI_SC_EV_DWORD0(state) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), state))
#define MHI_SC_EV_DWORD1(type) cpu_to_le32(FIELD_PREP(GENMASK(23, 16), type))
/* EE event */
#define MHI_EE_EV_PTR 0
#define MHI_EE_EV_DWORD0(ee) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), ee))
#define MHI_EE_EV_DWORD1(type) cpu_to_le32(FIELD_PREP(GENMASK(23, 16), type))
/* Command Completion event */
#define MHI_CC_EV_PTR(ptr) cpu_to_le64(ptr)
#define MHI_CC_EV_DWORD0(code) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), code))
#define MHI_CC_EV_DWORD1(type) cpu_to_le32(FIELD_PREP(GENMASK(23, 16), type))
/* Transfer descriptor macros */
#define MHI_TRE_DATA_PTR(ptr) cpu_to_le64(ptr)
#define MHI_TRE_DATA_DWORD0(len) cpu_to_le32(FIELD_PREP(GENMASK(15, 0), len))
#define MHI_TRE_TYPE_TRANSFER 2
#define MHI_TRE_DATA_DWORD1(bei, ieot, ieob, chain) cpu_to_le32(FIELD_PREP(GENMASK(23, 16), \
MHI_TRE_TYPE_TRANSFER) | \
FIELD_PREP(BIT(10), bei) | \
FIELD_PREP(BIT(9), ieot) | \
FIELD_PREP(BIT(8), ieob) | \
FIELD_PREP(BIT(0), chain))
#define MHI_TRE_DATA_GET_PTR(tre) le64_to_cpu((tre)->ptr)
#define MHI_TRE_DATA_GET_LEN(tre) FIELD_GET(GENMASK(15, 0), MHI_TRE_GET_DWORD(tre, 0))
#define MHI_TRE_DATA_GET_CHAIN(tre) (!!(FIELD_GET(BIT(0), MHI_TRE_GET_DWORD(tre, 1))))
#define MHI_TRE_DATA_GET_IEOB(tre) (!!(FIELD_GET(BIT(8), MHI_TRE_GET_DWORD(tre, 1))))
#define MHI_TRE_DATA_GET_IEOT(tre) (!!(FIELD_GET(BIT(9), MHI_TRE_GET_DWORD(tre, 1))))
#define MHI_TRE_DATA_GET_BEI(tre) (!!(FIELD_GET(BIT(10), MHI_TRE_GET_DWORD(tre, 1))))
/* RSC transfer descriptor macros */
#define MHI_RSCTRE_DATA_PTR(ptr, len) cpu_to_le64(FIELD_PREP(GENMASK(64, 48), len) | ptr)
#define MHI_RSCTRE_DATA_DWORD0(cookie) cpu_to_le32(cookie)
#define MHI_RSCTRE_DATA_DWORD1 cpu_to_le32(FIELD_PREP(GENMASK(23, 16), \
MHI_PKT_TYPE_COALESCING))
enum mhi_pkt_type {
MHI_PKT_TYPE_INVALID = 0x0,
MHI_PKT_TYPE_NOOP_CMD = 0x1,
MHI_PKT_TYPE_TRANSFER = 0x2,
MHI_PKT_TYPE_COALESCING = 0x8,
MHI_PKT_TYPE_RESET_CHAN_CMD = 0x10,
MHI_PKT_TYPE_STOP_CHAN_CMD = 0x11,
MHI_PKT_TYPE_START_CHAN_CMD = 0x12,
MHI_PKT_TYPE_STATE_CHANGE_EVENT = 0x20,
MHI_PKT_TYPE_CMD_COMPLETION_EVENT = 0x21,
MHI_PKT_TYPE_TX_EVENT = 0x22,
MHI_PKT_TYPE_RSC_TX_EVENT = 0x28,
MHI_PKT_TYPE_EE_EVENT = 0x40,
MHI_PKT_TYPE_TSYNC_EVENT = 0x48,
MHI_PKT_TYPE_BW_REQ_EVENT = 0x50,
MHI_PKT_TYPE_STALE_EVENT, /* internal event */
};
/* MHI transfer completion events */
enum mhi_ev_ccs {
MHI_EV_CC_INVALID = 0x0,
MHI_EV_CC_SUCCESS = 0x1,
MHI_EV_CC_EOT = 0x2, /* End of transfer event */
MHI_EV_CC_OVERFLOW = 0x3,
MHI_EV_CC_EOB = 0x4, /* End of block event */
MHI_EV_CC_OOB = 0x5, /* Out of block event */
MHI_EV_CC_DB_MODE = 0x6,
MHI_EV_CC_UNDEFINED_ERR = 0x10,
MHI_EV_CC_BAD_TRE = 0x11,
};
/* Channel state */
enum mhi_ch_state {
MHI_CH_STATE_DISABLED,
MHI_CH_STATE_ENABLED,
MHI_CH_STATE_RUNNING,
MHI_CH_STATE_SUSPENDED,
MHI_CH_STATE_STOP,
MHI_CH_STATE_ERROR,
};
enum mhi_cmd_type {
MHI_CMD_NOP = 1,
MHI_CMD_RESET_CHAN = 16,
MHI_CMD_STOP_CHAN = 17,
MHI_CMD_START_CHAN = 18,
};
#define EV_CTX_RESERVED_MASK GENMASK(7, 0)
#define EV_CTX_INTMODC_MASK GENMASK(15, 8)
#define EV_CTX_INTMODT_MASK GENMASK(31, 16)
struct mhi_event_ctxt {
__le32 intmod;
__le32 ertype;
__le32 msivec;
__le64 rbase __packed __aligned(4);
__le64 rlen __packed __aligned(4);
__le64 rp __packed __aligned(4);
__le64 wp __packed __aligned(4);
};
#define CHAN_CTX_CHSTATE_MASK GENMASK(7, 0)
#define CHAN_CTX_BRSTMODE_MASK GENMASK(9, 8)
#define CHAN_CTX_POLLCFG_MASK GENMASK(15, 10)
#define CHAN_CTX_RESERVED_MASK GENMASK(31, 16)
struct mhi_chan_ctxt {
__le32 chcfg;
__le32 chtype;
__le32 erindex;
__le64 rbase __packed __aligned(4);
__le64 rlen __packed __aligned(4);
__le64 rp __packed __aligned(4);
__le64 wp __packed __aligned(4);
};
struct mhi_cmd_ctxt {
__le32 reserved0;
__le32 reserved1;
__le32 reserved2;
__le64 rbase __packed __aligned(4);
__le64 rlen __packed __aligned(4);
__le64 rp __packed __aligned(4);
__le64 wp __packed __aligned(4);
};
struct mhi_ring_element {
__le64 ptr;
__le32 dword[2];
};
#define MHI_STATE_LIST \
mhi_state(RESET, "RESET") \
mhi_state(READY, "READY") \
mhi_state(M0, "M0") \
mhi_state(M1, "M1") \
mhi_state(M2, "M2") \
mhi_state(M3, "M3") \
mhi_state(M3_FAST, "M3_FAST") \
mhi_state(BHI, "BHI") \
mhi_state_end(SYS_ERR, "SYS ERROR")
#undef mhi_state
#undef mhi_state_end
#define mhi_state(a, b) case MHI_STATE_##a: return b;
#define mhi_state_end(a, b) case MHI_STATE_##a: return b;
static inline const char *mhi_state_str(enum mhi_state state)
{
switch (state) {
MHI_STATE_LIST
default:
return "Unknown state";
}
}
#endif /* _MHI_COMMON_H */
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