blob: c3c6ae0343524f51f5ec019bf4bed1c9a81ee6bd [file] [log] [blame]
/*
* Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <common/debug.h>
#include <common/runtime_svc.h>
#include <tools_share/uuid.h>
#include "socfpga_mailbox.h"
#include "socfpga_sip_svc.h"
/* Number of SiP Calls implemented */
#define SIP_NUM_CALLS 0x3
/* Total buffer the driver can hold */
#define FPGA_CONFIG_BUFFER_SIZE 4
static int current_block;
static int read_block;
static int current_buffer;
static int send_id;
static int rcv_id;
static int max_blocks;
static uint32_t bytes_per_block;
static uint32_t blocks_submitted;
struct fpga_config_info {
uint32_t addr;
int size;
int size_written;
uint32_t write_requested;
int subblocks_sent;
int block_number;
};
/* SiP Service UUID */
DEFINE_SVC_UUID2(intl_svc_uid,
0xa85273b0, 0xe85a, 0x4862, 0xa6, 0x2a,
0xfa, 0x88, 0x88, 0x17, 0x68, 0x81);
uint64_t socfpga_sip_handler(uint32_t smc_fid,
uint64_t x1,
uint64_t x2,
uint64_t x3,
uint64_t x4,
void *cookie,
void *handle,
uint64_t flags)
{
ERROR("%s: unhandled SMC (0x%x)\n", __func__, smc_fid);
SMC_RET1(handle, SMC_UNK);
}
struct fpga_config_info fpga_config_buffers[FPGA_CONFIG_BUFFER_SIZE];
static int intel_fpga_sdm_write_buffer(struct fpga_config_info *buffer)
{
uint32_t args[3];
while (max_blocks > 0 && buffer->size > buffer->size_written) {
args[0] = (1<<8);
args[1] = buffer->addr + buffer->size_written;
if (buffer->size - buffer->size_written <= bytes_per_block) {
args[2] = buffer->size - buffer->size_written;
current_buffer++;
current_buffer %= FPGA_CONFIG_BUFFER_SIZE;
} else
args[2] = bytes_per_block;
buffer->size_written += args[2];
mailbox_send_cmd_async(
send_id++ % MBOX_MAX_JOB_ID,
MBOX_RECONFIG_DATA,
args, 3, 0);
buffer->subblocks_sent++;
max_blocks--;
}
return !max_blocks;
}
static int intel_fpga_sdm_write_all(void)
{
for (int i = 0; i < FPGA_CONFIG_BUFFER_SIZE; i++)
if (intel_fpga_sdm_write_buffer(
&fpga_config_buffers[current_buffer]))
break;
return 0;
}
uint32_t intel_mailbox_fpga_config_isdone(void)
{
uint32_t ret = intel_mailbox_get_config_status(MBOX_RECONFIG_STATUS);
if (ret) {
if (ret == MBOX_CFGSTAT_STATE_CONFIG)
return INTEL_SIP_SMC_STATUS_BUSY;
else
return INTEL_SIP_SMC_STATUS_ERROR;
}
return INTEL_SIP_SMC_STATUS_OK;
}
static int mark_last_buffer_xfer_completed(uint32_t *buffer_addr_completed)
{
int i;
for (i = 0; i < FPGA_CONFIG_BUFFER_SIZE; i++) {
if (fpga_config_buffers[i].block_number == current_block) {
fpga_config_buffers[i].subblocks_sent--;
if (fpga_config_buffers[i].subblocks_sent == 0
&& fpga_config_buffers[i].size <=
fpga_config_buffers[i].size_written) {
fpga_config_buffers[i].write_requested = 0;
current_block++;
*buffer_addr_completed =
fpga_config_buffers[i].addr;
return 0;
}
}
}
return -1;
}
int intel_fpga_config_completed_write(uint32_t *completed_addr,
uint32_t *count)
{
uint32_t status = INTEL_SIP_SMC_STATUS_OK;
*count = 0;
int resp_len = 0;
uint32_t resp[5];
int all_completed = 1;
while (*count < 3) {
resp_len = mailbox_read_response(rcv_id % MBOX_MAX_JOB_ID,
resp, sizeof(resp) / sizeof(resp[0]));
if (resp_len < 0)
break;
max_blocks++;
rcv_id++;
if (mark_last_buffer_xfer_completed(
&completed_addr[*count]) == 0)
*count = *count + 1;
else
break;
}
if (*count <= 0) {
if (resp_len != MBOX_NO_RESPONSE &&
resp_len != MBOX_TIMEOUT && resp_len != 0) {
mailbox_clear_response();
return INTEL_SIP_SMC_STATUS_ERROR;
}
*count = 0;
}
intel_fpga_sdm_write_all();
if (*count > 0)
status = INTEL_SIP_SMC_STATUS_OK;
else if (*count == 0)
status = INTEL_SIP_SMC_STATUS_BUSY;
for (int i = 0; i < FPGA_CONFIG_BUFFER_SIZE; i++) {
if (fpga_config_buffers[i].write_requested != 0) {
all_completed = 0;
break;
}
}
if (all_completed == 1)
return INTEL_SIP_SMC_STATUS_OK;
return status;
}
int intel_fpga_config_start(uint32_t config_type)
{
uint32_t response[3];
int status = 0;
mailbox_clear_response();
mailbox_send_cmd(1, MBOX_CMD_CANCEL, 0, 0, 0, NULL, 0);
status = mailbox_send_cmd(1, MBOX_RECONFIG, 0, 0, 0,
response, sizeof(response) / sizeof(response[0]));
if (status < 0)
return status;
max_blocks = response[0];
bytes_per_block = response[1];
for (int i = 0; i < FPGA_CONFIG_BUFFER_SIZE; i++) {
fpga_config_buffers[i].size = 0;
fpga_config_buffers[i].size_written = 0;
fpga_config_buffers[i].addr = 0;
fpga_config_buffers[i].write_requested = 0;
fpga_config_buffers[i].block_number = 0;
fpga_config_buffers[i].subblocks_sent = 0;
}
blocks_submitted = 0;
current_block = 0;
read_block = 0;
current_buffer = 0;
send_id = 0;
rcv_id = 0;
return 0;
}
static bool is_fpga_config_buffer_full(void)
{
for (int i = 0; i < FPGA_CONFIG_BUFFER_SIZE; i++)
if (!fpga_config_buffers[i].write_requested)
return false;
return true;
}
static bool is_address_in_ddr_range(uint64_t addr)
{
if (addr >= DRAM_BASE && addr <= DRAM_BASE + DRAM_SIZE)
return true;
return false;
}
uint32_t intel_fpga_config_write(uint64_t mem, uint64_t size)
{
int i;
intel_fpga_sdm_write_all();
if (!is_address_in_ddr_range(mem) ||
!is_address_in_ddr_range(mem + size) ||
is_fpga_config_buffer_full())
return INTEL_SIP_SMC_STATUS_REJECTED;
for (i = 0; i < FPGA_CONFIG_BUFFER_SIZE; i++) {
int j = (i + current_buffer) % FPGA_CONFIG_BUFFER_SIZE;
if (!fpga_config_buffers[j].write_requested) {
fpga_config_buffers[j].addr = mem;
fpga_config_buffers[j].size = size;
fpga_config_buffers[j].size_written = 0;
fpga_config_buffers[j].write_requested = 1;
fpga_config_buffers[j].block_number =
blocks_submitted++;
fpga_config_buffers[j].subblocks_sent = 0;
break;
}
}
if (is_fpga_config_buffer_full())
return INTEL_SIP_SMC_STATUS_BUSY;
return INTEL_SIP_SMC_STATUS_OK;
}
/*
* This function is responsible for handling all SiP calls from the NS world
*/
uintptr_t sip_smc_handler(uint32_t smc_fid,
u_register_t x1,
u_register_t x2,
u_register_t x3,
u_register_t x4,
void *cookie,
void *handle,
u_register_t flags)
{
uint32_t status = INTEL_SIP_SMC_STATUS_OK;
uint32_t completed_addr[3];
uint32_t count = 0;
switch (smc_fid) {
case SIP_SVC_UID:
/* Return UID to the caller */
SMC_UUID_RET(handle, intl_svc_uid);
break;
case INTEL_SIP_SMC_FPGA_CONFIG_ISDONE:
status = intel_mailbox_fpga_config_isdone();
SMC_RET4(handle, status, 0, 0, 0);
break;
case INTEL_SIP_SMC_FPGA_CONFIG_GET_MEM:
SMC_RET3(handle, INTEL_SIP_SMC_STATUS_OK,
INTEL_SIP_SMC_FPGA_CONFIG_ADDR,
INTEL_SIP_SMC_FPGA_CONFIG_SIZE -
INTEL_SIP_SMC_FPGA_CONFIG_ADDR);
break;
case INTEL_SIP_SMC_FPGA_CONFIG_START:
status = intel_fpga_config_start(x1);
SMC_RET4(handle, status, 0, 0, 0);
break;
case INTEL_SIP_SMC_FPGA_CONFIG_WRITE:
status = intel_fpga_config_write(x1, x2);
SMC_RET4(handle, status, 0, 0, 0);
break;
case INTEL_SIP_SMC_FPGA_CONFIG_COMPLETED_WRITE:
status = intel_fpga_config_completed_write(completed_addr,
&count);
switch (count) {
case 1:
SMC_RET4(handle, INTEL_SIP_SMC_STATUS_OK,
completed_addr[0], 0, 0);
break;
case 2:
SMC_RET4(handle, INTEL_SIP_SMC_STATUS_OK,
completed_addr[0],
completed_addr[1], 0);
break;
case 3:
SMC_RET4(handle, INTEL_SIP_SMC_STATUS_OK,
completed_addr[0],
completed_addr[1],
completed_addr[2]);
break;
case 0:
SMC_RET4(handle, status, 0, 0, 0);
break;
default:
mailbox_clear_response();
SMC_RET1(handle, INTEL_SIP_SMC_STATUS_ERROR);
}
break;
default:
return socfpga_sip_handler(smc_fid, x1, x2, x3, x4,
cookie, handle, flags);
}
}
DECLARE_RT_SVC(
socfpga_sip_svc,
OEN_SIP_START,
OEN_SIP_END,
SMC_TYPE_FAST,
NULL,
sip_smc_handler
);
DECLARE_RT_SVC(
socfpga_sip_svc_std,
OEN_SIP_START,
OEN_SIP_END,
SMC_TYPE_YIELD,
NULL,
sip_smc_handler
);