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/* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef GSI_H
#define GSI_H
#include <linux/device.h>
#include <linux/types.h>
#include <linux/completion.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/msm_gsi.h>
#include <linux/ipc_logging.h>
#define GSI_CHAN_MAX 31
#define GSI_EVT_RING_MAX 23
#define GSI_NO_EVT_ERINDEX 31
#define gsi_readl(c) ({ u32 __v = readl_relaxed(c); __iormb(); __v; })
#define gsi_writel(v, c) ({ __iowmb(); writel_relaxed((v), (c)); })
#define GSI_IPC_LOGGING(buf, fmt, args...) \
do { \
if (buf) \
ipc_log_string((buf), fmt, __func__, __LINE__, \
## args); \
} while (0)
#define GSIDBG(fmt, args...) \
do { \
dev_dbg(gsi_ctx->dev, "%s:%d " fmt, __func__, __LINE__, \
## args);\
if (gsi_ctx) { \
GSI_IPC_LOGGING(gsi_ctx->ipc_logbuf, \
"%s:%d " fmt, ## args); \
GSI_IPC_LOGGING(gsi_ctx->ipc_logbuf_low, \
"%s:%d " fmt, ## args); \
} \
} while (0)
#define GSIDBG_LOW(fmt, args...) \
do { \
dev_dbg(gsi_ctx->dev, "%s:%d " fmt, __func__, __LINE__, \
## args);\
if (gsi_ctx) { \
GSI_IPC_LOGGING(gsi_ctx->ipc_logbuf_low, \
"%s:%d " fmt, ## args); \
} \
} while (0)
#define GSIERR(fmt, args...) \
do { \
dev_err(gsi_ctx->dev, "%s:%d " fmt, __func__, __LINE__, \
## args);\
if (gsi_ctx) { \
GSI_IPC_LOGGING(gsi_ctx->ipc_logbuf, \
"%s:%d " fmt, ## args); \
GSI_IPC_LOGGING(gsi_ctx->ipc_logbuf_low, \
"%s:%d " fmt, ## args); \
} \
} while (0)
#define GSI_IPC_LOG_PAGES 50
enum gsi_evt_ring_state {
GSI_EVT_RING_STATE_NOT_ALLOCATED = 0x0,
GSI_EVT_RING_STATE_ALLOCATED = 0x1,
GSI_EVT_RING_STATE_ERROR = 0xf
};
enum gsi_chan_state {
GSI_CHAN_STATE_NOT_ALLOCATED = 0x0,
GSI_CHAN_STATE_ALLOCATED = 0x1,
GSI_CHAN_STATE_STARTED = 0x2,
GSI_CHAN_STATE_STOPPED = 0x3,
GSI_CHAN_STATE_STOP_IN_PROC = 0x4,
GSI_CHAN_STATE_ERROR = 0xf
};
struct gsi_ring_ctx {
spinlock_t slock;
unsigned long base_va;
uint64_t base;
uint64_t wp;
uint64_t rp;
uint64_t wp_local;
uint64_t rp_local;
uint16_t len;
uint8_t elem_sz;
uint16_t max_num_elem;
uint64_t end;
};
struct gsi_chan_dp_stats {
unsigned long ch_below_lo;
unsigned long ch_below_hi;
unsigned long ch_above_hi;
unsigned long empty_time;
unsigned long last_timestamp;
};
struct gsi_chan_stats {
unsigned long queued;
unsigned long completed;
unsigned long callback_to_poll;
unsigned long poll_to_callback;
unsigned long invalid_tre_error;
unsigned long poll_ok;
unsigned long poll_empty;
struct gsi_chan_dp_stats dp;
};
struct gsi_chan_ctx {
struct gsi_chan_props props;
enum gsi_chan_state state;
struct gsi_ring_ctx ring;
void **user_data;
struct gsi_evt_ctx *evtr;
struct mutex mlock;
struct completion compl;
bool allocated;
atomic_t poll_mode;
union __packed gsi_channel_scratch scratch;
struct gsi_chan_stats stats;
bool enable_dp_stats;
bool print_dp_stats;
};
struct gsi_evt_stats {
unsigned long completed;
};
struct gsi_evt_ctx {
struct gsi_evt_ring_props props;
enum gsi_evt_ring_state state;
uint8_t id;
struct gsi_ring_ctx ring;
struct mutex mlock;
struct completion compl;
struct gsi_chan_ctx *chan;
atomic_t chan_ref_cnt;
union __packed gsi_evt_scratch scratch;
struct gsi_evt_stats stats;
};
struct gsi_ee_scratch {
union __packed {
struct {
uint32_t inter_ee_cmd_return_code:3;
uint32_t resvd1:2;
uint32_t generic_ee_cmd_return_code:3;
uint32_t resvd2:7;
uint32_t max_usb_pkt_size:1;
uint32_t resvd3:8;
uint32_t mhi_base_chan_idx:8;
} s;
uint32_t val;
} word0;
uint32_t word1;
};
struct ch_debug_stats {
unsigned long ch_allocate;
unsigned long ch_start;
unsigned long ch_stop;
unsigned long ch_reset;
unsigned long ch_de_alloc;
unsigned long ch_db_stop;
unsigned long cmd_completed;
};
struct gsi_generic_ee_cmd_debug_stats {
unsigned long halt_channel;
};
struct gsi_ctx {
void __iomem *base;
struct device *dev;
struct gsi_per_props per;
bool per_registered;
struct gsi_chan_ctx chan[GSI_CHAN_MAX];
struct ch_debug_stats ch_dbg[GSI_CHAN_MAX];
struct gsi_evt_ctx evtr[GSI_EVT_RING_MAX];
struct gsi_generic_ee_cmd_debug_stats gen_ee_cmd_dbg;
struct mutex mlock;
spinlock_t slock;
unsigned long evt_bmap;
bool enabled;
atomic_t num_chan;
atomic_t num_evt_ring;
struct gsi_ee_scratch scratch;
int num_ch_dp_stats;
struct workqueue_struct *dp_stat_wq;
u32 max_ch;
u32 max_ev;
struct completion gen_ee_cmd_compl;
void *ipc_logbuf;
void *ipc_logbuf_low;
};
enum gsi_re_type {
GSI_RE_XFER = 0x2,
GSI_RE_IMMD_CMD = 0x3,
};
struct __packed gsi_tre {
uint64_t buffer_ptr;
uint16_t buf_len;
uint16_t resvd1;
uint16_t chain:1;
uint16_t resvd4:7;
uint16_t ieob:1;
uint16_t ieot:1;
uint16_t bei:1;
uint16_t resvd3:5;
uint8_t re_type;
uint8_t resvd2;
};
struct __packed gsi_xfer_compl_evt {
uint64_t xfer_ptr;
uint16_t len;
uint8_t resvd1;
uint8_t code; /* see gsi_chan_evt */
uint16_t resvd;
uint8_t type;
uint8_t chid;
};
enum gsi_err_type {
GSI_ERR_TYPE_GLOB = 0x1,
GSI_ERR_TYPE_CHAN = 0x2,
GSI_ERR_TYPE_EVT = 0x3,
};
enum gsi_err_code {
GSI_INVALID_TRE_ERR = 0x1,
GSI_OUT_OF_BUFFERS_ERR = 0x2,
GSI_OUT_OF_RESOURCES_ERR = 0x3,
GSI_UNSUPPORTED_INTER_EE_OP_ERR = 0x4,
GSI_EVT_RING_EMPTY_ERR = 0x5,
GSI_NON_ALLOCATED_EVT_ACCESS_ERR = 0x6,
GSI_HWO_1_ERR = 0x8
};
struct __packed gsi_log_err {
uint32_t arg3:4;
uint32_t arg2:4;
uint32_t arg1:4;
uint32_t code:4;
uint32_t resvd:3;
uint32_t virt_idx:5;
uint32_t err_type:4;
uint32_t ee:4;
};
enum gsi_ch_cmd_opcode {
GSI_CH_ALLOCATE = 0x0,
GSI_CH_START = 0x1,
GSI_CH_STOP = 0x2,
GSI_CH_RESET = 0x9,
GSI_CH_DE_ALLOC = 0xa,
GSI_CH_DB_STOP = 0xb,
};
enum gsi_evt_ch_cmd_opcode {
GSI_EVT_ALLOCATE = 0x0,
GSI_EVT_RESET = 0x9, /* TODO: is this valid? */
GSI_EVT_DE_ALLOC = 0xa,
};
enum gsi_generic_ee_cmd_opcode {
GSI_GEN_EE_CMD_HALT_CHANNEL = 0x1,
};
enum gsi_generic_ee_cmd_return_code {
GSI_GEN_EE_CMD_RETURN_CODE_SUCCESS = 0x1,
GSI_GEN_EE_CMD_RETURN_CODE_CHANNEL_NOT_RUNNING = 0x2,
GSI_GEN_EE_CMD_RETURN_CODE_INCORRECT_DIRECTION = 0x3,
GSI_GEN_EE_CMD_RETURN_CODE_INCORRECT_CHANNEL_TYPE = 0x4,
GSI_GEN_EE_CMD_RETURN_CODE_INCORRECT_CHANNEL_INDEX = 0x5,
};
extern struct gsi_ctx *gsi_ctx;
void gsi_debugfs_init(void);
uint16_t gsi_find_idx_from_addr(struct gsi_ring_ctx *ctx, uint64_t addr);
void gsi_update_ch_dp_stats(struct gsi_chan_ctx *ctx, uint16_t used);
#endif
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