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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2016, Linaro Limited
*/
#include <arm.h>
#include <kernel/misc.h>
#include <kernel/msg_param.h>
#include <kernel/pseudo_ta.h>
#include <kernel/user_ta.h>
#include <kernel/thread.h>
#include <mm/core_memprot.h>
#include <mm/mobj.h>
#include <mm/tee_mmu.h>
#include <optee_msg_supplicant.h>
#include <pta_gprof.h>
#include <string.h>
static TEE_Result gprof_send_rpc(TEE_UUID *uuid, void *buf, size_t len,
uint32_t *id)
{
struct optee_msg_param params[3];
struct mobj *mobj;
TEE_Result res = TEE_ERROR_GENERIC;
uint64_t c = 0;
char *va;
mobj = thread_rpc_alloc_payload(sizeof(*uuid) + len, &c);
if (!mobj)
return TEE_ERROR_OUT_OF_MEMORY;
va = mobj_get_va(mobj, 0);
if (!va)
goto exit;
memcpy(va, uuid, sizeof(*uuid));
memcpy(va + sizeof(*uuid), buf, len);
memset(params, 0, sizeof(params));
params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INOUT;
params[0].u.value.a = *id;
msg_param_init_memparam(params + 1, mobj, 0, sizeof(*uuid), c,
MSG_PARAM_MEM_DIR_IN);
msg_param_init_memparam(params + 2, mobj, sizeof(*uuid), len, c,
MSG_PARAM_MEM_DIR_IN);
res = thread_rpc_cmd(OPTEE_MSG_RPC_CMD_GPROF, 3, params);
if (res != TEE_SUCCESS)
goto exit;
*id = (uint32_t)params[0].u.value.a;
exit:
thread_rpc_free_payload(c, mobj);
return res;
}
static TEE_Result gprof_send(struct tee_ta_session *s,
uint32_t param_types,
TEE_Param params[TEE_NUM_PARAMS])
{
uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_VALUE_INOUT,
TEE_PARAM_TYPE_MEMREF_INPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE);
if (exp_pt != param_types)
return TEE_ERROR_BAD_PARAMETERS;
return gprof_send_rpc(&s->ctx->uuid, params[1].memref.buffer,
params[1].memref.size, ¶ms[0].value.a);
}
static TEE_Result gprof_start_pc_sampling(struct tee_ta_session *s,
uint32_t param_types,
TEE_Param params[TEE_NUM_PARAMS])
{
uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT,
TEE_PARAM_TYPE_VALUE_INPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE);
struct sample_buf *sbuf;
uint32_t offset;
uint32_t scale;
TEE_Result res;
uint32_t len;
uaddr_t buf;
if (exp_pt != param_types)
return TEE_ERROR_BAD_PARAMETERS;
buf = (uaddr_t)params[0].memref.buffer;
len = params[0].memref.size;
offset = params[1].value.a;
scale = params[1].value.b;
res = tee_mmu_check_access_rights(to_user_ta_ctx(s->ctx),
TEE_MEMORY_ACCESS_WRITE |
TEE_MEMORY_ACCESS_ANY_OWNER,
buf, len);
if (res != TEE_SUCCESS)
return res;
sbuf = calloc(1, sizeof(*sbuf));
if (!sbuf)
return TEE_ERROR_OUT_OF_MEMORY;
sbuf->samples = (uint16_t *)buf;
sbuf->nsamples = len / sizeof(*sbuf->samples);
sbuf->offset = offset;
sbuf->scale = scale;
sbuf->freq = read_cntfrq();
sbuf->enabled = true;
s->sbuf = sbuf;
return TEE_SUCCESS;
}
static TEE_Result gprof_stop_pc_sampling(struct tee_ta_session *s,
uint32_t param_types,
TEE_Param params[TEE_NUM_PARAMS])
{
uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_VALUE_OUTPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE);
struct sample_buf *sbuf;
uint32_t rate;
if (exp_pt != param_types)
return TEE_ERROR_BAD_PARAMETERS;
sbuf = s->sbuf;
if (!sbuf)
return TEE_ERROR_BAD_STATE;
assert(sbuf->samples);
/* Stop sampling */
if (sbuf->enabled)
sbuf->enabled = false;
rate = ((uint64_t)sbuf->count * sbuf->freq) / sbuf->usr;
params[0].value.a = rate;
DMSG("TA sampling stats: sample count=%" PRIu32 " user time=%" PRIu64
" cntfrq=%" PRIu32 " rate=%" PRIu32, sbuf->count, sbuf->usr,
sbuf->freq, rate);
free(sbuf);
s->sbuf = NULL;
return TEE_SUCCESS;
}
/*
* Trusted Application Entry Points
*/
static TEE_Result open_session(uint32_t param_types __unused,
TEE_Param params[TEE_NUM_PARAMS] __unused,
void **sess_ctx __unused)
{
struct tee_ta_session *s;
/* Check that we're called from a user TA */
s = tee_ta_get_calling_session();
if (!s)
return TEE_ERROR_ACCESS_DENIED;
if (is_pseudo_ta_ctx(s->ctx))
return TEE_ERROR_ACCESS_DENIED;
return TEE_SUCCESS;
}
static TEE_Result invoke_command(void *sess_ctx __unused, uint32_t cmd_id,
uint32_t param_types,
TEE_Param params[TEE_NUM_PARAMS])
{
struct tee_ta_session *s = tee_ta_get_calling_session();
switch (cmd_id) {
case PTA_GPROF_SEND:
return gprof_send(s, param_types, params);
case PTA_GPROF_START_PC_SAMPLING:
return gprof_start_pc_sampling(s, param_types, params);
case PTA_GPROF_STOP_PC_SAMPLING:
return gprof_stop_pc_sampling(s, param_types, params);
default:
break;
}
return TEE_ERROR_NOT_IMPLEMENTED;
}
pseudo_ta_register(.uuid = PTA_GPROF_UUID, .name = "gprof",
.flags = PTA_DEFAULT_FLAGS,
.open_session_entry_point = open_session,
.invoke_command_entry_point = invoke_command);
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