dprintf(6, "ata_reset exit status=%x\n", status);
}
+// Check for drive RDY for 16bit interface command.
static int
isready(struct drive_s *drive_g)
{
return DISK_RET_ENOTREADY;
}
+// Default 16bit command demuxer for ATA and ATAPI devices.
static int
process_ata_misc_op(struct disk_op_s *op)
{
u8 device;
u8 command;
+ u8 feature2;
u8 sector_count2;
u8 lba_low2;
u8 lba_mid2;
return status;
}
- if (cmd->command == ATA_CMD_READ_SECTORS_EXT
- || cmd->command == ATA_CMD_WRITE_SECTORS_EXT) {
- outb(0x00, iobase1 + ATA_CB_FR);
+ // Check for ATA_CMD_(READ|WRITE)_(SECTORS|DMA)_EXT commands.
+ if ((cmd->command & ~0x11) == ATA_CMD_READ_SECTORS_EXT) {
+ outb(cmd->feature2, iobase1 + ATA_CB_FR);
outb(cmd->sector_count2, iobase1 + ATA_CB_SC);
outb(cmd->lba_low2, iobase1 + ATA_CB_SN);
outb(cmd->lba_mid2, iobase1 + ATA_CB_CL);
outb(cmd->lba_high, iobase1 + ATA_CB_CH);
outb(cmd->command, iobase1 + ATA_CB_CMD);
- status = ndelay_await_not_bsy(iobase1);
+ return 0;
+}
+
+// Wait for data after calling 'send_cmd'.
+static int
+ata_wait_data(u16 iobase1)
+{
+ int status = ndelay_await_not_bsy(iobase1);
if (status < 0)
return status;
return 0;
}
+// Send an ata command that does not transfer any further data.
+int
+ata_cmd_nondata(struct drive_s *drive_g, struct ata_pio_command *cmd)
+{
+ u8 ataid = GET_GLOBAL(drive_g->cntl_id);
+ u8 channel = ataid / 2;
+ u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1);
+ u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2);
+
+ // Disable interrupts
+ outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
+
+ int ret = send_cmd(drive_g, cmd);
+ if (ret)
+ goto fail;
+ ret = ndelay_await_not_bsy(iobase1);
+ if (ret < 0)
+ goto fail;
+
+ if (ret & ATA_CB_STAT_ERR) {
+ dprintf(6, "nondata cmd : read error (status=%02x err=%02x)\n"
+ , ret, inb(iobase1 + ATA_CB_ERR));
+ ret = -4;
+ goto fail;
+ }
+ if (ret & ATA_CB_STAT_DRQ) {
+ dprintf(6, "nondata cmd : DRQ set (status %02x)\n", ret);
+ ret = -5;
+ goto fail;
+ }
+
+fail:
+ // Enable interrupts
+ outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
+
+ return ret;
+}
+
/****************************************************************
- * ATA transfers
+ * ATA PIO transfers
****************************************************************/
// Transfer 'op->count' blocks (of 'blocksize' bytes) to/from drive
// 'op->drive_g'.
static int
-ata_transfer(struct disk_op_s *op, int iswrite, int blocksize)
+ata_pio_transfer(struct disk_op_s *op, int iswrite, int blocksize)
{
- dprintf(16, "ata_transfer id=%p write=%d count=%d bs=%d buf=%p\n"
+ dprintf(16, "ata_pio_transfer id=%p write=%d count=%d bs=%d buf=%p\n"
, op->drive_g, iswrite, op->count, blocksize, op->buf_fl);
u8 ataid = GET_GLOBAL(op->drive_g->cntl_id);
break;
status &= (ATA_CB_STAT_BSY | ATA_CB_STAT_DRQ | ATA_CB_STAT_ERR);
if (status != ATA_CB_STAT_DRQ) {
- dprintf(6, "ata_transfer : more sectors left (status %02x)\n"
+ dprintf(6, "ata_pio_transfer : more sectors left (status %02x)\n"
, status);
op->count -= count;
return -6;
if (!iswrite)
status &= ~ATA_CB_STAT_DF;
if (status != 0) {
- dprintf(6, "ata_transfer : no sectors left (status %02x)\n", status);
+ dprintf(6, "ata_pio_transfer : no sectors left (status %02x)\n", status);
return -7;
}
}
+/****************************************************************
+ * ATA DMA transfers
+ ****************************************************************/
+
+#define BM_CMD 0
+#define BM_CMD_MEMWRITE 0x08
+#define BM_CMD_START 0x01
+#define BM_STATUS 2
+#define BM_STATUS_IRQ 0x04
+#define BM_STATUS_ERROR 0x02
+#define BM_STATUS_ACTIVE 0x01
+#define BM_TABLE 4
+
+struct sff_dma_prd {
+ u32 buf_fl;
+ u32 count;
+};
+
+// Check if DMA available and setup transfer if so.
+static int
+ata_try_dma(struct disk_op_s *op, int iswrite, int blocksize)
+{
+ u32 dest = (u32)op->buf_fl;
+ if (dest & 1)
+ // Need minimum alignment of 1.
+ return -1;
+ u8 ataid = GET_GLOBAL(op->drive_g->cntl_id);
+ u8 channel = ataid / 2;
+ u16 iomaster = GET_GLOBAL(ATA_channels[channel].iomaster);
+ if (! iomaster)
+ return -1;
+ u32 bytes = op->count * blocksize;
+ if (! bytes)
+ return -1;
+
+ // Build PRD dma structure.
+ struct sff_dma_prd *dma = MAKE_FLATPTR(
+ get_ebda_seg()
+ , (void*)offsetof(struct extended_bios_data_area_s, extra_stack));
+ struct sff_dma_prd *origdma = dma;
+ while (bytes) {
+ if (dma >= &origdma[16])
+ // Too many descriptors..
+ return -1;
+ u32 count = bytes;
+ if (count > 0x10000)
+ count = 0x10000;
+ u32 max = 0x10000 - (dest & 0xffff);
+ if (count > max)
+ count = max;
+
+ SET_FLATPTR(dma->buf_fl, dest);
+ bytes -= count;
+ if (!bytes)
+ // Last descriptor.
+ count |= 1<<31;
+ dprintf(16, "dma@%p: %08x %08x\n", dma, dest, count);
+ dest += count;
+ SET_FLATPTR(dma->count, count);
+ dma++;
+ }
+
+ // Program bus-master controller.
+ outl((u32)origdma, iomaster + BM_TABLE);
+ u8 oldcmd = inb(iomaster + BM_CMD) & ~(BM_CMD_MEMWRITE|BM_CMD_START);
+ outb(oldcmd | (iswrite ? 0x00 : BM_CMD_MEMWRITE), iomaster + BM_CMD);
+ outb(BM_STATUS_ERROR|BM_STATUS_IRQ, iomaster + BM_STATUS);
+
+ return 0;
+}
+
+// Transfer data using DMA.
+static int
+ata_dma_transfer(struct disk_op_s *op)
+{
+ dprintf(16, "ata_dma_transfer id=%p buf=%p\n"
+ , op->drive_g, op->buf_fl);
+
+ u8 ataid = GET_GLOBAL(op->drive_g->cntl_id);
+ u8 channel = ataid / 2;
+ u16 iomaster = GET_GLOBAL(ATA_channels[channel].iomaster);
+
+ // Start bus-master controller.
+ u8 oldcmd = inb(iomaster + BM_CMD);
+ outb(oldcmd | BM_CMD_START, iomaster + BM_CMD);
+
+ u64 end = calc_future_tsc(IDE_TIMEOUT);
+ u8 status;
+ for (;;) {
+ status = inb(iomaster + BM_STATUS);
+ if (status & BM_STATUS_IRQ)
+ break;
+ // Transfer in progress
+ if (check_time(end)) {
+ // Timeout.
+ dprintf(1, "IDE DMA timeout\n");
+ break;
+ }
+ yield();
+ }
+ outb(oldcmd & ~BM_CMD_START, iomaster + BM_CMD);
+
+ u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1);
+ u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2);
+ int idestatus = pause_await_not_bsy(iobase1, iobase2);
+
+ if ((status & (BM_STATUS_IRQ|BM_STATUS_ACTIVE)) == BM_STATUS_IRQ
+ && idestatus >= 0x00
+ && (idestatus & (ATA_CB_STAT_BSY | ATA_CB_STAT_DF | ATA_CB_STAT_DRQ
+ | ATA_CB_STAT_ERR)) == 0x00)
+ // Success.
+ return 0;
+
+ dprintf(6, "IDE DMA error (dma=%x ide=%x/%x/%x)\n", status, idestatus
+ , inb(iobase2 + ATA_CB_ASTAT), inb(iobase1 + ATA_CB_ERR));
+ op->count = 0;
+ return -1;
+}
+
+
/****************************************************************
* ATA hard drive functions
****************************************************************/
-// Read/write count blocks from a harddrive.
+// Transfer data to harddrive using PIO protocol.
static int
-ata_cmd_data(struct disk_op_s *op, int iswrite, int command)
+ata_pio_cmd_data(struct disk_op_s *op, int iswrite, struct ata_pio_command *cmd)
{
u8 ataid = GET_GLOBAL(op->drive_g->cntl_id);
u8 channel = ataid / 2;
+ u16 iobase1 = GET_GLOBAL(ATA_channels[channel].iobase1);
u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2);
+
+ // Disable interrupts
+ outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
+
+ int ret = send_cmd(op->drive_g, cmd);
+ if (ret)
+ goto fail;
+ ret = ata_wait_data(iobase1);
+ if (ret)
+ goto fail;
+ ret = ata_pio_transfer(op, iswrite, DISK_SECTOR_SIZE);
+
+fail:
+ // Enable interrupts
+ outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
+ return ret;
+}
+
+// Transfer data to harddrive using DMA protocol.
+static int
+ata_dma_cmd_data(struct disk_op_s *op, struct ata_pio_command *cmd)
+{
+ int ret = send_cmd(op->drive_g, cmd);
+ if (ret)
+ return ret;
+ return ata_dma_transfer(op);
+}
+
+// Read/write count blocks from a harddrive.
+static int
+ata_readwrite(struct disk_op_s *op, int iswrite)
+{
u64 lba = op->lba;
+ int usepio = ata_try_dma(op, iswrite, DISK_SECTOR_SIZE);
+
struct ata_pio_command cmd;
memset(&cmd, 0, sizeof(cmd));
- cmd.command = command;
if (op->count >= (1<<8) || lba + op->count >= (1<<28)) {
cmd.sector_count2 = op->count >> 8;
cmd.lba_low2 = lba >> 24;
cmd.lba_mid2 = lba >> 32;
cmd.lba_high2 = lba >> 40;
-
- cmd.command |= 0x04;
lba &= 0xffffff;
+
+ if (usepio)
+ cmd.command = (iswrite ? ATA_CMD_WRITE_SECTORS_EXT
+ : ATA_CMD_READ_SECTORS_EXT);
+ else
+ cmd.command = (iswrite ? ATA_CMD_WRITE_DMA_EXT
+ : ATA_CMD_READ_DMA_EXT);
+ } else {
+ if (usepio)
+ cmd.command = (iswrite ? ATA_CMD_WRITE_SECTORS
+ : ATA_CMD_READ_SECTORS);
+ else
+ cmd.command = (iswrite ? ATA_CMD_WRITE_DMA
+ : ATA_CMD_READ_DMA);
}
- cmd.feature = 0;
cmd.sector_count = op->count;
cmd.lba_low = lba;
cmd.lba_mid = lba >> 8;
cmd.lba_high = lba >> 16;
cmd.device = ((lba >> 24) & 0xf) | ATA_CB_DH_LBA;
- // Disable interrupts
- outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
-
- int ret = send_cmd(op->drive_g, &cmd);
+ int ret;
+ if (usepio)
+ ret = ata_pio_cmd_data(op, iswrite, &cmd);
+ else
+ ret = ata_dma_cmd_data(op, &cmd);
if (ret)
- goto fail;
- ret = ata_transfer(op, iswrite, DISK_SECTOR_SIZE);
-
-fail:
- // Enable interrupts
- outb(ATA_CB_DC_HD15, iobase2+ATA_CB_DC);
- return ret;
+ return DISK_RET_EBADTRACK;
+ return DISK_RET_SUCCESS;
}
+// 16bit command demuxer for ATA harddrives.
int
process_ata_op(struct disk_op_s *op)
{
if (!CONFIG_ATA)
return 0;
- int ret;
switch (op->command) {
case CMD_READ:
- ret = ata_cmd_data(op, 0, ATA_CMD_READ_SECTORS);
- break;
+ return ata_readwrite(op, 0);
case CMD_WRITE:
- ret = ata_cmd_data(op, 1, ATA_CMD_WRITE_SECTORS);
- break;
+ return ata_readwrite(op, 1);
default:
return process_ata_misc_op(op);
}
- if (ret)
- return DISK_RET_EBADTRACK;
- return DISK_RET_SUCCESS;
}
u16 iobase2 = GET_GLOBAL(ATA_channels[channel].iobase2);
struct ata_pio_command cmd;
- cmd.sector_count = 0;
- cmd.feature = 0;
- cmd.lba_low = 0;
+ memset(&cmd, 0, sizeof(cmd));
cmd.lba_mid = blocksize;
cmd.lba_high = blocksize >> 8;
- cmd.device = 0;
cmd.command = ATA_CMD_PACKET;
// Disable interrupts
outb(ATA_CB_DC_HD15 | ATA_CB_DC_NIEN, iobase2 + ATA_CB_DC);
int ret = send_cmd(op->drive_g, &cmd);
+ if (ret)
+ goto fail;
+ ret = ata_wait_data(iobase1);
if (ret)
goto fail;
goto fail;
}
- ret = ata_transfer(op, 0, blocksize);
+ ret = ata_pio_transfer(op, 0, blocksize);
fail:
// Enable interrupts
return atapi_cmd_data(op, atacmd, sizeof(atacmd), CDROM_SECTOR_SIZE);
}
+// 16bit command demuxer for ATAPI cdroms.
int
process_atapi_op(struct disk_op_s *op)
{
switch (op->command) {
case CMD_READ:
ret = cdrom_read(op);
- break;
+ if (ret)
+ return DISK_RET_EBADTRACK;
+ return DISK_RET_SUCCESS;
case CMD_FORMAT:
case CMD_WRITE:
return DISK_RET_EWRITEPROTECT;
default:
return process_ata_misc_op(op);
}
- if (ret)
- return DISK_RET_EBADTRACK;
- return DISK_RET_SUCCESS;
}
// Send a simple atapi command to a drive.
* ATA detect and init
****************************************************************/
+// Send an identify device or identify device packet command.
+static int
+send_ata_identity(struct drive_s *drive_g, u16 *buffer, int command)
+{
+ memset(buffer, 0, DISK_SECTOR_SIZE);
+
+ struct disk_op_s dop;
+ memset(&dop, 0, sizeof(dop));
+ dop.drive_g = drive_g;
+ dop.count = 1;
+ dop.lba = 1;
+ dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer);
+
+ struct ata_pio_command cmd;
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.command = command;
+
+ return ata_pio_cmd_data(&dop, 0, &cmd);
+}
+
// Extract the ATA/ATAPI version info.
static int
extract_version(u16 *buffer)
SET_GLOBAL(drive_g->cntl_info, extract_version(buffer));
}
+// Print out a description of the given atapi drive.
void
describe_atapi(struct drive_s *drive_g)
{
, (iscd ? "CD-Rom/DVD-Rom" : "Device"));
}
+// Detect if the given drive is an atapi - initialize it if so.
static struct drive_s *
init_drive_atapi(struct drive_s *dummy, u16 *buffer)
{
// Send an IDENTIFY_DEVICE_PACKET command to device
- memset(buffer, 0, DISK_SECTOR_SIZE);
- struct disk_op_s dop;
- memset(&dop, 0, sizeof(dop));
- dop.drive_g = dummy;
- dop.count = 1;
- dop.lba = 1;
- dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer);
- int ret = ata_cmd_data(&dop, 0, ATA_CMD_IDENTIFY_DEVICE_PACKET);
+ int ret = send_ata_identity(dummy, buffer, ATA_CMD_IDENTIFY_PACKET_DEVICE);
if (ret)
return NULL;
return drive_g;
}
+// Print out a description of the given ata drive.
void
describe_ata(struct drive_s *drive_g)
{
printf(" (%u GiBytes)", (u32)(sizeinmb >> 10));
}
+// Detect if the given drive is a regular ata drive - initialize it if so.
static struct drive_s *
init_drive_ata(struct drive_s *dummy, u16 *buffer)
{
// Send an IDENTIFY_DEVICE command to device
- memset(buffer, 0, DISK_SECTOR_SIZE);
- struct disk_op_s dop;
- memset(&dop, 0, sizeof(dop));
- dop.drive_g = dummy;
- dop.count = 1;
- dop.lba = 1;
- dop.buf_fl = MAKE_FLATPTR(GET_SEG(SS), buffer);
- int ret = ata_cmd_data(&dop, 0, ATA_CMD_IDENTIFY_DEVICE);
+ int ret = send_ata_identity(dummy, buffer, ATA_CMD_IDENTIFY_DEVICE);
if (ret)
return NULL;
static u64 SpinupEnd;
+// Wait for non-busy status and check for "floating bus" condition.
static int
powerup_await_non_bsy(u16 base)
{
return status;
}
+// Detect any drives attached to a given controller.
static void
ata_detect(void *data)
{
}
}
+// Initialize an ata controller and detect its drives.
static void
init_controller(struct ata_channel_s *atachannel
- , int bdf, int irq, u32 port1, u32 port2)
+ , int bdf, int irq, u32 port1, u32 port2, u32 master)
{
SET_GLOBAL(atachannel->irq, irq);
SET_GLOBAL(atachannel->pci_bdf, bdf);
SET_GLOBAL(atachannel->iobase1, port1);
SET_GLOBAL(atachannel->iobase2, port2);
- dprintf(1, "ATA controller %d at %x/%x (irq %d dev %x)\n"
- , atachannel - ATA_channels, port1, port2, irq, bdf);
+ SET_GLOBAL(atachannel->iomaster, master);
+ dprintf(1, "ATA controller %d at %x/%x/%x (irq %d dev %x)\n"
+ , atachannel - ATA_channels, port1, port2, master, irq, bdf);
run_thread(ata_detect, atachannel);
}
#define IRQ_ATA1 14
#define IRQ_ATA2 15
+// Locate and init ata controllers.
static void
ata_init()
{
u8 pciirq = pci_config_readb(bdf, PCI_INTERRUPT_LINE);
u8 prog_if = pci_config_readb(bdf, PCI_CLASS_PROG);
+ int master = 0;
+ if (prog_if & 0x80) {
+ // Check for bus-mastering.
+ u32 bar = pci_config_readl(bdf, PCI_BASE_ADDRESS_4);
+ if (bar & PCI_BASE_ADDRESS_SPACE_IO) {
+ master = bar & PCI_BASE_ADDRESS_IO_MASK;
+ pci_config_maskw(bdf, PCI_COMMAND, 0, PCI_COMMAND_MASTER);
+ }
+ }
+
u32 port1, port2, irq;
if (prog_if & 1) {
port1 = pci_config_readl(bdf, PCI_BASE_ADDRESS_0) & ~3;
port2 = PORT_ATA1_CTRL_BASE;
irq = IRQ_ATA1;
}
- init_controller(&ATA_channels[count], bdf, irq, port1, port2);
+ init_controller(&ATA_channels[count], bdf, irq, port1, port2, master);
count++;
if (prog_if & 4) {
port2 = PORT_ATA2_CTRL_BASE;
irq = IRQ_ATA2;
}
- init_controller(&ATA_channels[count], bdf, irq, port1, port2);
+ init_controller(&ATA_channels[count], bdf, irq, port1, port2
+ , master ? master + 8 : 0);
count++;
}
if (!CONFIG_COREBOOT && !pcicount && ARRAY_SIZE(ATA_channels) >= 2) {
// No PCI devices found - probably a QEMU "-M isapc" machine.
// Try using ISA ports for ATA controllers.
- init_controller(&ATA_channels[0]
- , -1, IRQ_ATA1, PORT_ATA1_CMD_BASE, PORT_ATA1_CTRL_BASE);
- init_controller(&ATA_channels[1]
- , -1, IRQ_ATA2, PORT_ATA2_CMD_BASE, PORT_ATA2_CTRL_BASE);
+ init_controller(&ATA_channels[0], -1, IRQ_ATA1
+ , PORT_ATA1_CMD_BASE, PORT_ATA1_CTRL_BASE, 0);
+ init_controller(&ATA_channels[1], -1, IRQ_ATA2
+ , PORT_ATA2_CMD_BASE, PORT_ATA2_CTRL_BASE, 0);
}
}
projects / seabios.git / commitdiff