static void format(void)
{
// This function is called upon the very first power-up of the SSD.
// This function does the low-level format (i.e. FTL level format) of SSD.
// A typical FTL would create its mapping table and the list of free blocks.
// However, this example does nothing more than erasing all the free blocks.
//
// This function may take a long time to complete. For example, erasing all the flash blocks can
// take more than ten seconds depending on the total density.
// In that case, the host will declare time-out error. (no response from SSD for a long time)
// A suggested solution to this problem is:
// When you power-up the SSD for the first time, connect the power cable but not the SATA cable.
// At the end of this function, you can put a call to led(1) to indicate that the low level format
// has been completed. When the LED is on, turn off the power, connect the SATA cable, and turn on
// the power again.
UINT32 vblk_offset, bank;
for (vblk_offset = 1; vblk_offset < VBLKS_PER_BANK; vblk_offset++)
{
for (bank = 0; bank < NUM_BANKS; bank++)
{
if (is_bad_block(bank, vblk_offset))
continue;
// You do not need to set the values of FCP_DMA_ADDR, FCP_DMA_CNT and FCP_COL for FC_ERASE.
SETREG(FCP_CMD, FC_ERASE);
SETREG(FCP_BANK, REAL_BANK(bank));
SETREG(FCP_OPTION, FO_P);
SETREG(FCP_ROW_L(bank), vblk_offset * PAGES_PER_VBLK);
SETREG(FCP_ROW_H(bank), vblk_offset * PAGES_PER_VBLK);
// You should not issue a new command when Waiting Room is not empty.
while ((GETREG(WR_STAT) & 0x00000001) != 0);
// By writing any value to FCP_ISSUE, you put FC_ERASE into Waiting Room.
// The value written to FCP_ISSUE does not have any meaning.
SETREG(FCP_ISSUE, NULL);
}
}
// In general, write_format_mark() should be called upon completion of low level format in order to prevent
// format() from being called again.
// However, since the tutorial FTL does not support power off recovery,
// format() should be called every time.
init_meta_data();
ftl_flush();
write_format_mark();
led(1);
}
static ssize_t ftl_write(FAR struct inode *inode, const unsigned char *buffer,
size_t start_sector, unsigned int nsectors)
{
struct ftl_struct_s *dev;
finfo("sector: %d nsectors: %d\n", start_sector, nsectors);
DEBUGASSERT(inode && inode->i_private);
dev = (struct ftl_struct_s *)inode->i_private;
#ifdef CONFIG_FTL_WRITEBUFFER
return rwb_write(&dev->rwb, start_sector, nsectors, buffer);
#else
return ftl_flush(dev, buffer, start_sector, nsectors);
#endif
}
static void tc_write_rand(const UINT32 start_lsn, const UINT32 io_num, const UINT32 sector_size)
{
UINT32 i, j, wr_buf_addr, rd_buf_addr, data, r_data;
UINT32 lba, num_sectors = sector_size;
UINT32 io_cnt = io_num;
/* UINT32 volatile g_barrier = 0; while (g_barrier == 0); */
led(0);
srand(RANDOM_SEED);
for (UINT32 loop = 0; loop < 1; loop++) {
wr_buf_addr = WR_BUF_ADDR;
data = 0;
uart_printf("test loop cnt: %d", loop);
for (i = 0; i < io_cnt; i++) {
do {
lba = rand() % IO_LIMIT;
}while(lba + num_sectors >= IO_LIMIT);
wr_buf_addr = WR_BUF_PTR(g_ftl_write_buf_id) + ((lba % SECTORS_PER_PAGE) * BYTES_PER_SECTOR);
r_data = data;
for (j = 0; j < num_sectors; j++) {
mem_set_dram(wr_buf_addr, data, BYTES_PER_SECTOR);
wr_buf_addr += BYTES_PER_SECTOR;
if (wr_buf_addr >= WR_BUF_ADDR + WR_BUF_BYTES) {
wr_buf_addr = WR_BUF_ADDR;
}
data++;
}
/* ptimer_start(); */
ftl_write(lba, num_sectors);
/* ptimer_stop_and_uart_print(); */
rd_buf_addr = RD_BUF_PTR(g_ftl_read_buf_id) + ((lba % SECTORS_PER_PAGE) * BYTES_PER_SECTOR);
/* ptimer_start(); */
ftl_read(lba, num_sectors);
/* ptimer_stop_and_uart_print(); */
flash_finish();
for (j = 0; j < num_sectors; j++) {
UINT32 sample = read_dram_32(rd_buf_addr);
if (sample != r_data) {
uart_printf("ftl test fail...io#: %d, %d", lba, num_sectors);
uart_printf("sample data %d should be %d", sample, r_data);
led_blink();
}
rd_buf_addr += BYTES_PER_SECTOR;
if (rd_buf_addr >= RD_BUF_ADDR + RD_BUF_BYTES) {
rd_buf_addr = RD_BUF_ADDR;
}
r_data++;
}
} // end for
}
ftl_flush();
}
static void tc_write_seq(const UINT32 start_lsn, const UINT32 io_num, const UINT32 sector_size)
{
UINT32 i, j, wr_buf_addr, rd_buf_addr, data;
UINT32 lba, num_sectors = sector_size;
UINT32 io_cnt = io_num;
UINT32 const start_lba = start_lsn;
/* UINT32 volatile g_barrier = 0; while (g_barrier == 0); */
led(0);
// STEP 1 - write
for (UINT32 loop = 0; loop < 5; loop++)
{
wr_buf_addr = WR_BUF_ADDR;
data = 0;
lba = start_lba;
uart_print_32(loop); uart_print("");
for (i = 0; i < io_cnt; i++)
{
wr_buf_addr = WR_BUF_PTR(g_ftl_write_buf_id) + ((lba % SECTORS_PER_PAGE) * BYTES_PER_SECTOR);
for (j = 0; j < num_sectors; j++)
{
mem_set_dram(wr_buf_addr, data, BYTES_PER_SECTOR);
wr_buf_addr += BYTES_PER_SECTOR;
if (wr_buf_addr >= WR_BUF_ADDR + WR_BUF_BYTES)
{
wr_buf_addr = WR_BUF_ADDR;
}
data++;
}
if( i == 0x0000081C)
i = i;
ptimer_start();
ftl_write(lba, num_sectors);
ptimer_stop_and_uart_print();
lba += num_sectors;
if (lba >= (UINT32)NUM_LSECTORS)
{
uart_print("adjust lba because of out of lba");
lba = 0;
}
}
// STEP 2 - read and verify
rd_buf_addr = RD_BUF_ADDR;
data = 0;
lba = start_lba;
num_sectors = MIN(num_sectors, NUM_RD_BUFFERS * SECTORS_PER_PAGE);
for (i = 0; i < io_cnt; i++)
{
rd_buf_addr = RD_BUF_PTR(g_ftl_read_buf_id) + ((lba % SECTORS_PER_PAGE) * BYTES_PER_SECTOR);
/* ptimer_start(); */
if( i == 0x0000081C)
i = i;
ftl_read(lba, num_sectors);
flash_finish();
/* ptimer_stop_and_uart_print(); */
for (j = 0; j < num_sectors; j++)
{
UINT32 sample = read_dram_32(rd_buf_addr);
if (sample != data)
{
uart_printf("ftl test fail...io#: %d, %d", lba, num_sectors);
uart_printf("sample data %d should be %d", sample, data);
led_blink();
}
rd_buf_addr += BYTES_PER_SECTOR;
if (rd_buf_addr >= RD_BUF_ADDR + RD_BUF_BYTES)
{
rd_buf_addr = RD_BUF_ADDR;
}
data++;
}
lba += num_sectors;
if (lba >= IO_LIMIT + num_sectors)
{
lba = 0;
}
}
}
ftl_flush();
}
void ata_flush_cache(UINT32 lba, UINT32 sector_count)
{
ftl_flush();
send_status_to_host(0);
}
void ata_idle_immediate(UINT32 lba, UINT32 sector_count)
{
ftl_flush();
send_status_to_host(0);
}