libpayload/ahci: Fix a warning by decompartmentalise the AHCI driver.
Decompartmentalise AHCI driver into two parts, ATA and ATAPI. Add a few superficial comments while here. This also fixes a compiler warning. Change-Id: Ia1fd545b39868a81cbc311f6ffc786f9f1f61415 Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com> Reviewed-on: http://review.coreboot.org/4783 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Edward O'Callaghan
Patrick Georgi
parent
09af15e09e
commit
efc5841ab4
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@ -54,10 +54,18 @@ libc-$(CONFIG_GEODELX_VIDEO_CONSOLE) += video/font8x16.c
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libc-$(CONFIG_COREBOOT_VIDEO_CONSOLE) += video/corebootfb.c
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libc-$(CONFIG_COREBOOT_VIDEO_CONSOLE) += video/corebootfb.c
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libc-$(CONFIG_COREBOOT_VIDEO_CONSOLE) += video/font8x16.c
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libc-$(CONFIG_COREBOOT_VIDEO_CONSOLE) += video/font8x16.c
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# AHCI/ATAPI driver
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libc-$(CONFIG_STORAGE) += storage/storage.c
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libc-$(CONFIG_STORAGE) += storage/storage.c
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libc-$(CONFIG_STORAGE_ATA) += storage/ata.c
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libc-$(CONFIG_STORAGE_ATAPI) += storage/atapi.c
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libc-$(CONFIG_STORAGE_AHCI) += storage/ahci.c
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libc-$(CONFIG_STORAGE_AHCI) += storage/ahci.c
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libc-$(CONFIG_STORAGE_AHCI) += storage/ahci_common.c
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ifeq ($(CONFIG_STORAGE_ATA),y)
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libc-$(CONFIG_STORAGE_ATA) += storage/ata.c
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libc-$(CONFIG_STORAGE_ATA) += storage/ahci_ata.c
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endif
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ifeq ($(CONFIG_STORAGE_ATAPI),y)
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libc-$(CONFIG_STORAGE_ATAPI) += storage/atapi.c
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libc-$(CONFIG_STORAGE_ATAPI) += storage/ahci_atapi.c
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endif
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# USB stack
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# USB stack
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libc-$(CONFIG_USB) += usb/usbinit.c
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libc-$(CONFIG_USB) += usb/usbinit.c
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@ -71,54 +71,8 @@ static inline int ahci_port_is_active(const hba_port_t *const port)
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== (HBA_PxSSTS_IPM_ACTIVE | HBA_PxSSTS_DET_ESTABLISHED);
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== (HBA_PxSSTS_IPM_ACTIVE | HBA_PxSSTS_DET_ESTABLISHED);
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}
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}
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static int ahci_cmdengine_start(hba_port_t *const port)
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{
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/* CR has to be clear before starting the command engine.
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This shouldn't take too long, but we should time out nevertheless. */
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int timeout = 1000; /* Time out after 1000 * 1us == 1ms. */
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while ((port->cmd_stat & HBA_PxCMD_CR) && timeout--)
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udelay(1);
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if (timeout < 0) {
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printf("ahci: Timeout during start of command engine.\n");
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return 1;
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}
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port->cmd_stat |= HBA_PxCMD_FRE;
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port->cmd_stat |= HBA_PxCMD_ST;
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return 0;
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}
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static int ahci_cmdengine_stop(hba_port_t *const port)
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{
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port->cmd_stat &= ~HBA_PxCMD_ST;
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/* Wait for the controller to clear CR.
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This shouldn't take too long, but we should time out nevertheless. */
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int timeout = 1000; /* Time out after 1000 * 1us == 1ms. */
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while ((port->cmd_stat & HBA_PxCMD_CR) && timeout--)
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udelay(1);
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if (timeout < 0) {
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printf("ahci: Timeout during stopping of command engine.\n");
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return 1;
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}
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port->cmd_stat &= ~HBA_PxCMD_FRE;
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/* Wait for the controller to clear FR.
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This shouldn't take too long, but we should time out nevertheless. */
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timeout = 1000; /* Time out after 1000 * 1us == 1ms. */
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while ((port->cmd_stat & HBA_PxCMD_FR) && timeout--)
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udelay(1);
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if (timeout < 0) {
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printf("ahci: Timeout during stopping of command engine.\n");
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return 1;
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}
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return 0;
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}
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/** Do minimal error recovery. */
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/** Do minimal error recovery. */
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static int ahci_error_recovery(ahci_dev_t *const dev, const u32 intr_status)
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int ahci_error_recovery(ahci_dev_t *const dev, const u32 intr_status)
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{
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{
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/* Command engine has to be restarted.
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/* Command engine has to be restarted.
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We don't call ahci_cmdengine_stop() here as it also checks
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We don't call ahci_cmdengine_stop() here as it also checks
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@ -145,231 +99,6 @@ static int ahci_error_recovery(ahci_dev_t *const dev, const u32 intr_status)
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return -1;
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return -1;
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}
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}
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/** Give a buffer with even address. */
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static u8 *ahci_prdbuf_init(ahci_dev_t *const dev,
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u8 *const user_buf, const size_t len,
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const int out)
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{
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if ((u32)user_buf & 1) {
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printf("ahci: Odd buffer pointer (%p).\n", user_buf);
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if (dev->buf) /* orphaned buffer */
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free((void *)dev->buf - *(dev->buf - 1));
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dev->buf = malloc(len + 2);
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if (!dev->buf)
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return NULL;
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dev->user_buf = user_buf;
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dev->write_back = !out;
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dev->buflen = len;
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if ((u32)dev->buf & 1) {
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dev->buf[0] = 1;
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dev->buf += 1;
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} else {
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dev->buf[0] = 1;
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dev->buf[1] = 2;
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dev->buf += 2;
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}
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if (out)
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memcpy(dev->buf, user_buf, len);
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return dev->buf;
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} else {
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return user_buf;
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}
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}
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static void ahci_prdbuf_finalize(ahci_dev_t *const dev)
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{
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if (dev->buf) {
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if (dev->write_back)
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memcpy(dev->user_buf, dev->buf, dev->buflen);
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free((void *)dev->buf - *(dev->buf - 1));
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}
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dev->buf = NULL;
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dev->user_buf = NULL;
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dev->write_back = 0;
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dev->buflen = 0;
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}
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static ssize_t ahci_cmdslot_exec(ahci_dev_t *const dev)
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{
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const int slotnum = 0; /* We always use the first slot. */
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if (!(dev->port->cmd_stat & HBA_PxCMD_CR))
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return -1;
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/* Trigger command execution. */
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dev->port->cmd_issue |= (1 << slotnum);
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/* Wait for the controller to finish command execution. */
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int timeout = 50000; /* Time out after 50000 * 100us == 5s. */
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while ((dev->port->cmd_issue & (1 << slotnum)) &&
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!(dev->port->intr_status & HBA_PxIS_TFES) &&
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timeout--)
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udelay(100);
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if (timeout < 0) {
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printf("ahci: Timeout during command execution.\n");
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return -1;
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}
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ahci_prdbuf_finalize(dev);
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const u32 intr_status = ahci_clear_status(dev->port, intr_status);
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if (intr_status & (HBA_PxIS_FATAL | HBA_PxIS_PCS)) {
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ahci_error_recovery(dev, intr_status);
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return -1;
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} else {
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return dev->cmdlist[slotnum].prd_bytes;
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}
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}
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static size_t ahci_cmdslot_prepare(ahci_dev_t *const dev,
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u8 *const user_buf, size_t buf_len,
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const int out)
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{
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const int slotnum = 0; /* We always use the first slot. */
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size_t read_count = 0;
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memset((void *)&dev->cmdlist[slotnum],
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'\0', sizeof(dev->cmdlist[slotnum]));
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memset((void *)dev->cmdtable,
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'\0', sizeof(*dev->cmdtable));
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dev->cmdlist[slotnum].cmd = CMD_CFL(FIS_H2D_FIS_LEN);
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dev->cmdlist[slotnum].cmdtable_base = virt_to_phys(dev->cmdtable);
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if (buf_len > 0) {
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size_t prdt_len;
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u8 *buf;
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int i;
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prdt_len = ((buf_len - 1) >> BYTES_PER_PRD_SHIFT) + 1;
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const size_t max_prdt_len = ARRAY_SIZE(dev->cmdtable->prdt);
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if (prdt_len > max_prdt_len) {
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prdt_len = max_prdt_len;
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buf_len = prdt_len << BYTES_PER_PRD_SHIFT;
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}
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dev->cmdlist[slotnum].prdt_length = prdt_len;
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read_count = buf_len;
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buf = ahci_prdbuf_init(dev, user_buf, buf_len, out);
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if (!buf)
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return 0;
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for (i = 0; i < prdt_len; ++i) {
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const size_t bytes =
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(buf_len < BYTES_PER_PRD)
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? buf_len : BYTES_PER_PRD;
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dev->cmdtable->prdt[i].data_base = virt_to_phys(buf);
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dev->cmdtable->prdt[i].flags = PRD_TABLE_BYTES(bytes);
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buf_len -= bytes;
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buf += bytes;
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}
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}
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return read_count;
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}
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static ssize_t ahci_ata_read_sectors(ata_dev_t *const ata_dev,
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const lba_t start, size_t count,
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u8 *const buf)
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{
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ahci_dev_t *const dev = (ahci_dev_t *)ata_dev;
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if (count == 0)
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return 0;
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if (ata_dev->read_cmd == ATA_READ_DMA) {
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if (start >= (1 << 28)) {
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printf("ahci: Sector is not 28-bit addressable.\n");
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return -1;
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} else if (count > 256) {
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printf("ahci: Sector count too high (max. 256).\n");
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count = 256;
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}
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#ifdef CONFIG_STORAGE_64BIT_LBA
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} else if (ata_dev->read_cmd == ATA_READ_DMA_EXT) {
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if (start >= (1ULL << 48)) {
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printf("ahci: Sector is not 48-bit addressable.\n");
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return -1;
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} else if (count > (64 * 1024)) {
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printf("ahci: Sector count too high (max. 65536).\n");
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count = 64 * 1024;
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}
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#endif
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} else {
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printf("ahci: Unsupported ATA read command (0x%x).\n",
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ata_dev->read_cmd);
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return -1;
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}
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const size_t bytes = count << ata_dev->sector_size_shift;
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const size_t bytes_feasible = ahci_cmdslot_prepare(dev, buf, bytes, 0);
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const size_t sectors = bytes_feasible >> ata_dev->sector_size_shift;
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dev->cmdtable->fis[ 0] = FIS_HOST_TO_DEVICE;
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dev->cmdtable->fis[ 1] = FIS_H2D_CMD;
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dev->cmdtable->fis[ 2] = ata_dev->read_cmd;
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dev->cmdtable->fis[ 4] = (start >> 0) & 0xff;
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dev->cmdtable->fis[ 5] = (start >> 8) & 0xff;
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dev->cmdtable->fis[ 6] = (start >> 16) & 0xff;
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dev->cmdtable->fis[ 7] = FIS_H2D_DEV_LBA;
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dev->cmdtable->fis[ 8] = (start >> 24) & 0xff;
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#ifdef CONFIG_STORAGE_64BIT_LBA
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if (ata_dev->read_cmd == ATA_READ_DMA_EXT) {
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dev->cmdtable->fis[ 9] = (start >> 32) & 0xff;
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dev->cmdtable->fis[10] = (start >> 40) & 0xff;
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}
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#endif
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dev->cmdtable->fis[12] = (sectors >> 0) & 0xff;
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dev->cmdtable->fis[13] = (sectors >> 8) & 0xff;
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if (ahci_cmdslot_exec(dev) < 0)
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return -1;
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else
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return dev->cmdlist->prd_bytes >> ata_dev->sector_size_shift;
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}
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static ssize_t ahci_packet_read_cmd(atapi_dev_t *const _dev,
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const u8 *const cmd, const size_t cmdlen,
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u8 *const buf, const size_t buflen)
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{
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ahci_dev_t *const dev = (ahci_dev_t *)_dev;
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if ((cmdlen != 12) && (cmdlen != 16)) {
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printf("ahci: Only 12- and 16-byte packet commands allowed.\n");
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return -1;
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}
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const size_t len = ahci_cmdslot_prepare(dev, buf, buflen, 0);
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u16 byte_limit = MIN(len, 63 * 1024); /* like Linux */
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if (byte_limit & 1) ++byte_limit; /* even limit */
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dev->cmdlist[0].cmd |= CMD_ATAPI;
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dev->cmdtable->fis[0] = FIS_HOST_TO_DEVICE;
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dev->cmdtable->fis[1] = FIS_H2D_CMD;
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dev->cmdtable->fis[2] = ATA_PACKET;
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dev->cmdtable->fis[5] = byte_limit & 0xff;
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dev->cmdtable->fis[6] = byte_limit >> 8;
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memcpy((void *)dev->cmdtable->atapi_cmd, cmd, cmdlen);
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return ahci_cmdslot_exec(dev);
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}
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static int ahci_identify_device(ata_dev_t *const ata_dev, u8 *const buf)
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{
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ahci_dev_t *const dev = (ahci_dev_t *)ata_dev;
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ahci_cmdslot_prepare(dev, buf, 512, 0);
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dev->cmdtable->fis[0] = FIS_HOST_TO_DEVICE;
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dev->cmdtable->fis[1] = FIS_H2D_CMD;
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dev->cmdtable->fis[2] = ata_dev->identify_cmd;
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if ((ahci_cmdslot_exec(dev) < 0) || (dev->cmdlist->prd_bytes != 512))
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return -1;
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else
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return 0;
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}
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static int ahci_dev_init(hba_ctrl_t *const ctrl,
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static int ahci_dev_init(hba_ctrl_t *const ctrl,
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hba_port_t *const port,
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hba_port_t *const port,
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const int portnum)
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const int portnum)
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@ -0,0 +1,100 @@
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/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2012 secunet Security Networks AG
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* Copyright (C) 2013 Edward O'Callaghan <eocallaghan@alterapraxis.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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||||||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <stdint.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <libpayload.h>
|
||||||
|
#include <pci.h>
|
||||||
|
#include <storage/ata.h>
|
||||||
|
#include <storage/ahci.h>
|
||||||
|
|
||||||
|
#include "ahci_private.h"
|
||||||
|
|
||||||
|
|
||||||
|
ssize_t ahci_ata_read_sectors(ata_dev_t *const ata_dev,
|
||||||
|
const lba_t start, size_t count,
|
||||||
|
u8 *const buf)
|
||||||
|
{
|
||||||
|
ahci_dev_t *const dev = (ahci_dev_t *)ata_dev;
|
||||||
|
|
||||||
|
if (count == 0)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
if (ata_dev->read_cmd == ATA_READ_DMA) {
|
||||||
|
if (start >= (1 << 28)) {
|
||||||
|
printf("ahci: Sector is not 28-bit addressable.\n");
|
||||||
|
return -1;
|
||||||
|
} else if (count > 256) {
|
||||||
|
printf("ahci: Sector count too high (max. 256).\n");
|
||||||
|
count = 256;
|
||||||
|
}
|
||||||
|
#ifdef CONFIG_STORAGE_64BIT_LBA
|
||||||
|
} else if (ata_dev->read_cmd == ATA_READ_DMA_EXT) {
|
||||||
|
if (start >= (1ULL << 48)) {
|
||||||
|
printf("ahci: Sector is not 48-bit addressable.\n");
|
||||||
|
return -1;
|
||||||
|
} else if (count > (64 * 1024)) {
|
||||||
|
printf("ahci: Sector count too high (max. 65536).\n");
|
||||||
|
count = 64 * 1024;
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
} else {
|
||||||
|
printf("ahci: Unsupported ATA read command (0x%x).\n",
|
||||||
|
ata_dev->read_cmd);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
const size_t bytes = count << ata_dev->sector_size_shift;
|
||||||
|
const size_t bytes_feasible = ahci_cmdslot_prepare(dev, buf, bytes, 0);
|
||||||
|
const size_t sectors = bytes_feasible >> ata_dev->sector_size_shift;
|
||||||
|
|
||||||
|
dev->cmdtable->fis[ 0] = FIS_HOST_TO_DEVICE;
|
||||||
|
dev->cmdtable->fis[ 1] = FIS_H2D_CMD;
|
||||||
|
dev->cmdtable->fis[ 2] = ata_dev->read_cmd;
|
||||||
|
dev->cmdtable->fis[ 4] = (start >> 0) & 0xff;
|
||||||
|
dev->cmdtable->fis[ 5] = (start >> 8) & 0xff;
|
||||||
|
dev->cmdtable->fis[ 6] = (start >> 16) & 0xff;
|
||||||
|
dev->cmdtable->fis[ 7] = FIS_H2D_DEV_LBA;
|
||||||
|
dev->cmdtable->fis[ 8] = (start >> 24) & 0xff;
|
||||||
|
#ifdef CONFIG_STORAGE_64BIT_LBA
|
||||||
|
if (ata_dev->read_cmd == ATA_READ_DMA_EXT) {
|
||||||
|
dev->cmdtable->fis[ 9] = (start >> 32) & 0xff;
|
||||||
|
dev->cmdtable->fis[10] = (start >> 40) & 0xff;
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
dev->cmdtable->fis[12] = (sectors >> 0) & 0xff;
|
||||||
|
dev->cmdtable->fis[13] = (sectors >> 8) & 0xff;
|
||||||
|
|
||||||
|
if (ahci_cmdslot_exec(dev) < 0)
|
||||||
|
return -1;
|
||||||
|
else
|
||||||
|
return dev->cmdlist->prd_bytes >> ata_dev->sector_size_shift;
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,67 @@
|
||||||
|
/*
|
||||||
|
* This file is part of the libpayload project.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2012 secunet Security Networks AG
|
||||||
|
* Copyright (C) 2013 Edward O'Callaghan <eocallaghan@alterapraxis.com>
|
||||||
|
*
|
||||||
|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* 1. Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in the
|
||||||
|
* documentation and/or other materials provided with the distribution.
|
||||||
|
* 3. The name of the author may not be used to endorse or promote products
|
||||||
|
* derived from this software without specific prior written permission.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <stdint.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <libpayload.h>
|
||||||
|
#include <pci.h>
|
||||||
|
#include <storage/ata.h>
|
||||||
|
#include <storage/ahci.h>
|
||||||
|
|
||||||
|
|
||||||
|
#include "ahci_private.h"
|
||||||
|
|
||||||
|
|
||||||
|
ssize_t ahci_packet_read_cmd(atapi_dev_t *const _dev,
|
||||||
|
const u8 *const cmd, const size_t cmdlen,
|
||||||
|
u8 *const buf, const size_t buflen)
|
||||||
|
{
|
||||||
|
ahci_dev_t *const dev = (ahci_dev_t *)_dev;
|
||||||
|
|
||||||
|
if ((cmdlen != 12) && (cmdlen != 16)) {
|
||||||
|
printf("ahci: Only 12- and 16-byte packet commands allowed.\n");
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
const size_t len = ahci_cmdslot_prepare(dev, buf, buflen, 0);
|
||||||
|
u16 byte_limit = MIN(len, 63 * 1024); /* like Linux */
|
||||||
|
if (byte_limit & 1) ++byte_limit; /* even limit */
|
||||||
|
|
||||||
|
dev->cmdlist[0].cmd |= CMD_ATAPI;
|
||||||
|
dev->cmdtable->fis[0] = FIS_HOST_TO_DEVICE;
|
||||||
|
dev->cmdtable->fis[1] = FIS_H2D_CMD;
|
||||||
|
dev->cmdtable->fis[2] = ATA_PACKET;
|
||||||
|
dev->cmdtable->fis[5] = byte_limit & 0xff;
|
||||||
|
dev->cmdtable->fis[6] = byte_limit >> 8;
|
||||||
|
memcpy((void *)dev->cmdtable->atapi_cmd, cmd, cmdlen);
|
||||||
|
|
||||||
|
return ahci_cmdslot_exec(dev);
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,250 @@
|
||||||
|
/*
|
||||||
|
* This file is part of the libpayload project.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2012 secunet Security Networks AG
|
||||||
|
* Copyright (C) 2013 Edward O'Callaghan <eocallaghan@alterapraxis.com>
|
||||||
|
*
|
||||||
|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* 1. Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in the
|
||||||
|
* documentation and/or other materials provided with the distribution.
|
||||||
|
* 3. The name of the author may not be used to endorse or promote products
|
||||||
|
* derived from this software without specific prior written permission.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||||
|
* SUCH DAMAGE.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <stdint.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <libpayload.h>
|
||||||
|
#include <pci.h>
|
||||||
|
#include <storage/ata.h>
|
||||||
|
#include <storage/ahci.h>
|
||||||
|
|
||||||
|
#include "ahci_private.h"
|
||||||
|
|
||||||
|
|
||||||
|
#ifdef DEBUG_STATUS
|
||||||
|
static inline u32 _ahci_clear_status(volatile u32 *const reg,
|
||||||
|
const char *const r,
|
||||||
|
const char *const f)
|
||||||
|
{
|
||||||
|
const u32 bits = *reg;
|
||||||
|
if (bits)
|
||||||
|
*reg = bits;
|
||||||
|
printf("ahci: %s: %s == 0x%08x\n", f, r, bits);
|
||||||
|
|
||||||
|
return bits;
|
||||||
|
}
|
||||||
|
#define ahci_clear_status(p, r) _ahci_clear_status(&(p)->r, #r, __func__)
|
||||||
|
#else
|
||||||
|
static inline u32 _ahci_clear_status(volatile u32 *const reg)
|
||||||
|
{
|
||||||
|
const u32 bits = *reg;
|
||||||
|
if (bits)
|
||||||
|
*reg = bits;
|
||||||
|
return bits;
|
||||||
|
}
|
||||||
|
#define ahci_clear_status(p, r) _ahci_clear_status(&(p)->r)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
|
||||||
|
/** Give a buffer with even address. */
|
||||||
|
static u8 *ahci_prdbuf_init(ahci_dev_t *const dev,
|
||||||
|
u8 *const user_buf, const size_t len,
|
||||||
|
const int out)
|
||||||
|
{
|
||||||
|
if ((u32)user_buf & 1) {
|
||||||
|
printf("ahci: Odd buffer pointer (%p).\n", user_buf);
|
||||||
|
if (dev->buf) /* orphaned buffer */
|
||||||
|
free((void *)dev->buf - *(dev->buf - 1));
|
||||||
|
dev->buf = malloc(len + 2);
|
||||||
|
if (!dev->buf)
|
||||||
|
return NULL;
|
||||||
|
dev->user_buf = user_buf;
|
||||||
|
dev->write_back = !out;
|
||||||
|
dev->buflen = len;
|
||||||
|
if ((u32)dev->buf & 1) {
|
||||||
|
dev->buf[0] = 1;
|
||||||
|
dev->buf += 1;
|
||||||
|
} else {
|
||||||
|
dev->buf[0] = 1;
|
||||||
|
dev->buf[1] = 2;
|
||||||
|
dev->buf += 2;
|
||||||
|
}
|
||||||
|
if (out)
|
||||||
|
memcpy(dev->buf, user_buf, len);
|
||||||
|
return dev->buf;
|
||||||
|
} else {
|
||||||
|
return user_buf;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static void ahci_prdbuf_finalize(ahci_dev_t *const dev)
|
||||||
|
{
|
||||||
|
if (dev->buf) {
|
||||||
|
if (dev->write_back)
|
||||||
|
memcpy(dev->user_buf, dev->buf, dev->buflen);
|
||||||
|
free((void *)dev->buf - *(dev->buf - 1));
|
||||||
|
}
|
||||||
|
dev->buf = NULL;
|
||||||
|
dev->user_buf = NULL;
|
||||||
|
dev->write_back = 0;
|
||||||
|
dev->buflen = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int ahci_cmdengine_start(hba_port_t *const port)
|
||||||
|
{
|
||||||
|
/* CR has to be clear before starting the command engine.
|
||||||
|
This shouldn't take too long, but we should time out nevertheless. */
|
||||||
|
int timeout = 1000; /* Time out after 1000 * 1us == 1ms. */
|
||||||
|
while ((port->cmd_stat & HBA_PxCMD_CR) && timeout--)
|
||||||
|
udelay(1);
|
||||||
|
if (timeout < 0) {
|
||||||
|
printf("ahci: Timeout during start of command engine.\n");
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
port->cmd_stat |= HBA_PxCMD_FRE;
|
||||||
|
port->cmd_stat |= HBA_PxCMD_ST;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int ahci_cmdengine_stop(hba_port_t *const port)
|
||||||
|
{
|
||||||
|
port->cmd_stat &= ~HBA_PxCMD_ST;
|
||||||
|
|
||||||
|
/* Wait for the controller to clear CR.
|
||||||
|
This shouldn't take too long, but we should time out nevertheless. */
|
||||||
|
int timeout = 1000; /* Time out after 1000 * 1us == 1ms. */
|
||||||
|
while ((port->cmd_stat & HBA_PxCMD_CR) && timeout--)
|
||||||
|
udelay(1);
|
||||||
|
if (timeout < 0) {
|
||||||
|
printf("ahci: Timeout during stopping of command engine.\n");
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
port->cmd_stat &= ~HBA_PxCMD_FRE;
|
||||||
|
|
||||||
|
/* Wait for the controller to clear FR.
|
||||||
|
This shouldn't take too long, but we should time out nevertheless. */
|
||||||
|
timeout = 1000; /* Time out after 1000 * 1us == 1ms. */
|
||||||
|
while ((port->cmd_stat & HBA_PxCMD_FR) && timeout--)
|
||||||
|
udelay(1);
|
||||||
|
if (timeout < 0) {
|
||||||
|
printf("ahci: Timeout during stopping of command engine.\n");
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
ssize_t ahci_cmdslot_exec(ahci_dev_t *const dev)
|
||||||
|
{
|
||||||
|
const int slotnum = 0; /* We always use the first slot. */
|
||||||
|
|
||||||
|
if (!(dev->port->cmd_stat & HBA_PxCMD_CR))
|
||||||
|
return -1;
|
||||||
|
|
||||||
|
/* Trigger command execution. */
|
||||||
|
dev->port->cmd_issue |= (1 << slotnum);
|
||||||
|
|
||||||
|
/* Wait for the controller to finish command execution. */
|
||||||
|
int timeout = 50000; /* Time out after 50000 * 100us == 5s. */
|
||||||
|
while ((dev->port->cmd_issue & (1 << slotnum)) &&
|
||||||
|
!(dev->port->intr_status & HBA_PxIS_TFES) &&
|
||||||
|
timeout--)
|
||||||
|
udelay(100);
|
||||||
|
if (timeout < 0) {
|
||||||
|
printf("ahci: Timeout during command execution.\n");
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
ahci_prdbuf_finalize(dev);
|
||||||
|
|
||||||
|
const u32 intr_status = ahci_clear_status(dev->port, intr_status);
|
||||||
|
if (intr_status & (HBA_PxIS_FATAL | HBA_PxIS_PCS)) {
|
||||||
|
ahci_error_recovery(dev, intr_status);
|
||||||
|
return -1;
|
||||||
|
} else {
|
||||||
|
return dev->cmdlist[slotnum].prd_bytes;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
size_t ahci_cmdslot_prepare(ahci_dev_t *const dev,
|
||||||
|
u8 *const user_buf, size_t buf_len,
|
||||||
|
const int out)
|
||||||
|
{
|
||||||
|
const int slotnum = 0; /* We always use the first slot. */
|
||||||
|
|
||||||
|
size_t read_count = 0;
|
||||||
|
|
||||||
|
memset((void *)&dev->cmdlist[slotnum],
|
||||||
|
'\0', sizeof(dev->cmdlist[slotnum]));
|
||||||
|
memset((void *)dev->cmdtable,
|
||||||
|
'\0', sizeof(*dev->cmdtable));
|
||||||
|
dev->cmdlist[slotnum].cmd = CMD_CFL(FIS_H2D_FIS_LEN);
|
||||||
|
dev->cmdlist[slotnum].cmdtable_base = virt_to_phys(dev->cmdtable);
|
||||||
|
|
||||||
|
if (buf_len > 0) {
|
||||||
|
size_t prdt_len;
|
||||||
|
u8 *buf;
|
||||||
|
int i;
|
||||||
|
|
||||||
|
prdt_len = ((buf_len - 1) >> BYTES_PER_PRD_SHIFT) + 1;
|
||||||
|
const size_t max_prdt_len = ARRAY_SIZE(dev->cmdtable->prdt);
|
||||||
|
if (prdt_len > max_prdt_len) {
|
||||||
|
prdt_len = max_prdt_len;
|
||||||
|
buf_len = prdt_len << BYTES_PER_PRD_SHIFT;
|
||||||
|
}
|
||||||
|
|
||||||
|
dev->cmdlist[slotnum].prdt_length = prdt_len;
|
||||||
|
read_count = buf_len;
|
||||||
|
|
||||||
|
buf = ahci_prdbuf_init(dev, user_buf, buf_len, out);
|
||||||
|
if (!buf)
|
||||||
|
return 0;
|
||||||
|
for (i = 0; i < prdt_len; ++i) {
|
||||||
|
const size_t bytes =
|
||||||
|
(buf_len < BYTES_PER_PRD)
|
||||||
|
? buf_len : BYTES_PER_PRD;
|
||||||
|
dev->cmdtable->prdt[i].data_base = virt_to_phys(buf);
|
||||||
|
dev->cmdtable->prdt[i].flags = PRD_TABLE_BYTES(bytes);
|
||||||
|
buf_len -= bytes;
|
||||||
|
buf += bytes;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return read_count;
|
||||||
|
}
|
||||||
|
|
||||||
|
int ahci_identify_device(ata_dev_t *const ata_dev, u8 *const buf)
|
||||||
|
{
|
||||||
|
ahci_dev_t *const dev = (ahci_dev_t *)ata_dev;
|
||||||
|
|
||||||
|
ahci_cmdslot_prepare(dev, buf, 512, 0);
|
||||||
|
|
||||||
|
dev->cmdtable->fis[0] = FIS_HOST_TO_DEVICE;
|
||||||
|
dev->cmdtable->fis[1] = FIS_H2D_CMD;
|
||||||
|
dev->cmdtable->fis[2] = ata_dev->identify_cmd;
|
||||||
|
|
||||||
|
if ((ahci_cmdslot_exec(dev) < 0) || (dev->cmdlist->prd_bytes != 512))
|
||||||
|
return -1;
|
||||||
|
else
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
@ -2,6 +2,7 @@
|
||||||
* This file is part of the libpayload project.
|
* This file is part of the libpayload project.
|
||||||
*
|
*
|
||||||
* Copyright (C) 2012 secunet Security Networks AG
|
* Copyright (C) 2012 secunet Security Networks AG
|
||||||
|
* Copyright (C) 2013 Edward O'Callaghan <eocallaghan@alterapraxis.com>
|
||||||
*
|
*
|
||||||
* Redistribution and use in source and binary forms, with or without
|
* Redistribution and use in source and binary forms, with or without
|
||||||
* modification, are permitted provided that the following conditions
|
* modification, are permitted provided that the following conditions
|
||||||
|
|
@ -198,4 +199,36 @@ typedef struct {
|
||||||
size_t buflen;
|
size_t buflen;
|
||||||
} ahci_dev_t;
|
} ahci_dev_t;
|
||||||
|
|
||||||
#endif
|
/*
|
||||||
|
* ahci_common.c
|
||||||
|
*/
|
||||||
|
int ahci_cmdengine_start(hba_port_t *const port);
|
||||||
|
|
||||||
|
int ahci_cmdengine_stop(hba_port_t *const port);
|
||||||
|
|
||||||
|
ssize_t ahci_cmdslot_exec(ahci_dev_t *const dev);
|
||||||
|
|
||||||
|
size_t ahci_cmdslot_prepare(ahci_dev_t *const dev,
|
||||||
|
u8 *const user_buf, size_t buf_len,
|
||||||
|
const int out);
|
||||||
|
|
||||||
|
int ahci_identify_device(ata_dev_t *const ata_dev, u8 *const buf);
|
||||||
|
|
||||||
|
int ahci_error_recovery(ahci_dev_t *const dev, const u32 intr_status);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* ahci_atapi.c
|
||||||
|
*/
|
||||||
|
ssize_t ahci_packet_read_cmd(atapi_dev_t *const _dev,
|
||||||
|
const u8 *const cmd, const size_t cmdlen,
|
||||||
|
u8 *const buf, const size_t buflen);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* ahci_ata.c
|
||||||
|
*/
|
||||||
|
ssize_t ahci_ata_read_sectors(ata_dev_t *const ata_dev,
|
||||||
|
const lba_t start, size_t count,
|
||||||
|
u8 *const buf);
|
||||||
|
|
||||||
|
|
||||||
|
#endif /* _AHCI_PRIVATE_H */
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue