| /* |
| * libata-acpi.c |
| * Provides ACPI support for PATA/SATA. |
| * |
| * Copyright (C) 2006 Intel Corp. |
| * Copyright (C) 2006 Randy Dunlap |
| */ |
| |
| #include <linux/ata.h> |
| #include <linux/delay.h> |
| #include <linux/device.h> |
| #include <linux/errno.h> |
| #include <linux/kernel.h> |
| #include <linux/acpi.h> |
| #include <linux/libata.h> |
| #include <linux/pci.h> |
| #include "libata.h" |
| |
| #include <acpi/acpi_bus.h> |
| #include <acpi/acnames.h> |
| #include <acpi/acnamesp.h> |
| #include <acpi/acparser.h> |
| #include <acpi/acexcep.h> |
| #include <acpi/acmacros.h> |
| #include <acpi/actypes.h> |
| |
| #define SATA_ROOT_PORT(x) (((x) >> 16) & 0xffff) |
| #define SATA_PORT_NUMBER(x) ((x) & 0xffff) /* or NO_PORT_MULT */ |
| #define NO_PORT_MULT 0xffff |
| #define SATA_ADR_RSVD 0xffffffff |
| |
| #define REGS_PER_GTF 7 |
| struct taskfile_array { |
| u8 tfa[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ |
| }; |
| |
| |
| /** |
| * sata_get_dev_handle - finds acpi_handle and PCI device.function |
| * @dev: device to locate |
| * @handle: returned acpi_handle for @dev |
| * @pcidevfn: return PCI device.func for @dev |
| * |
| * This function is somewhat SATA-specific. Or at least the |
| * PATA & SATA versions of this function are different, |
| * so it's not entirely generic code. |
| * |
| * Returns 0 on success, <0 on error. |
| */ |
| static int sata_get_dev_handle(struct device *dev, acpi_handle *handle, |
| acpi_integer *pcidevfn) |
| { |
| struct pci_dev *pci_dev; |
| acpi_integer addr; |
| |
| pci_dev = to_pci_dev(dev); /* NOTE: PCI-specific */ |
| /* Please refer to the ACPI spec for the syntax of _ADR. */ |
| addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn); |
| *pcidevfn = addr; |
| *handle = acpi_get_child(DEVICE_ACPI_HANDLE(dev->parent), addr); |
| if (!*handle) |
| return -ENODEV; |
| return 0; |
| } |
| |
| /** |
| * pata_get_dev_handle - finds acpi_handle and PCI device.function |
| * @dev: device to locate |
| * @handle: returned acpi_handle for @dev |
| * @pcidevfn: return PCI device.func for @dev |
| * |
| * The PATA and SATA versions of this function are different. |
| * |
| * Returns 0 on success, <0 on error. |
| */ |
| static int pata_get_dev_handle(struct device *dev, acpi_handle *handle, |
| acpi_integer *pcidevfn) |
| { |
| unsigned int bus, devnum, func; |
| acpi_integer addr; |
| acpi_handle dev_handle, parent_handle; |
| struct acpi_buffer buffer = {.length = ACPI_ALLOCATE_BUFFER, |
| .pointer = NULL}; |
| acpi_status status; |
| struct acpi_device_info *dinfo = NULL; |
| int ret = -ENODEV; |
| struct pci_dev *pdev = to_pci_dev(dev); |
| |
| bus = pdev->bus->number; |
| devnum = PCI_SLOT(pdev->devfn); |
| func = PCI_FUNC(pdev->devfn); |
| |
| dev_handle = DEVICE_ACPI_HANDLE(dev); |
| parent_handle = DEVICE_ACPI_HANDLE(dev->parent); |
| |
| status = acpi_get_object_info(parent_handle, &buffer); |
| if (ACPI_FAILURE(status)) |
| goto err; |
| |
| dinfo = buffer.pointer; |
| if (dinfo && (dinfo->valid & ACPI_VALID_ADR) && |
| dinfo->address == bus) { |
| /* ACPI spec for _ADR for PCI bus: */ |
| addr = (acpi_integer)(devnum << 16 | func); |
| *pcidevfn = addr; |
| *handle = dev_handle; |
| } else { |
| goto err; |
| } |
| |
| if (!*handle) |
| goto err; |
| ret = 0; |
| err: |
| kfree(dinfo); |
| return ret; |
| } |
| |
| struct walk_info { /* can be trimmed some */ |
| struct device *dev; |
| struct acpi_device *adev; |
| acpi_handle handle; |
| acpi_integer pcidevfn; |
| unsigned int drivenum; |
| acpi_handle obj_handle; |
| struct ata_port *ataport; |
| struct ata_device *atadev; |
| u32 sata_adr; |
| int status; |
| char basepath[ACPI_PATHNAME_MAX]; |
| int basepath_len; |
| }; |
| |
| static acpi_status get_devices(acpi_handle handle, |
| u32 level, void *context, void **return_value) |
| { |
| acpi_status status; |
| struct walk_info *winfo = context; |
| struct acpi_buffer namebuf = {ACPI_ALLOCATE_BUFFER, NULL}; |
| char *pathname; |
| struct acpi_buffer buffer; |
| struct acpi_device_info *dinfo; |
| |
| status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &namebuf); |
| if (status) |
| goto ret; |
| pathname = namebuf.pointer; |
| |
| buffer.length = ACPI_ALLOCATE_BUFFER; |
| buffer.pointer = NULL; |
| status = acpi_get_object_info(handle, &buffer); |
| if (ACPI_FAILURE(status)) |
| goto out2; |
| |
| dinfo = buffer.pointer; |
| |
| /* find full device path name for pcidevfn */ |
| if (dinfo && (dinfo->valid & ACPI_VALID_ADR) && |
| dinfo->address == winfo->pcidevfn) { |
| if (ata_msg_probe(winfo->ataport)) |
| ata_dev_printk(winfo->atadev, KERN_DEBUG, |
| ":%s: matches pcidevfn (0x%llx)\n", |
| pathname, winfo->pcidevfn); |
| strlcpy(winfo->basepath, pathname, |
| sizeof(winfo->basepath)); |
| winfo->basepath_len = strlen(pathname); |
| goto out; |
| } |
| |
| /* if basepath is not yet known, ignore this object */ |
| if (!winfo->basepath_len) |
| goto out; |
| |
| /* if this object is in scope of basepath, maybe use it */ |
| if (strncmp(pathname, winfo->basepath, |
| winfo->basepath_len) == 0) { |
| if (!(dinfo->valid & ACPI_VALID_ADR)) |
| goto out; |
| if (ata_msg_probe(winfo->ataport)) |
| ata_dev_printk(winfo->atadev, KERN_DEBUG, |
| "GOT ONE: (%s) root_port = 0x%llx," |
| " port_num = 0x%llx\n", pathname, |
| SATA_ROOT_PORT(dinfo->address), |
| SATA_PORT_NUMBER(dinfo->address)); |
| /* heuristics: */ |
| if (SATA_PORT_NUMBER(dinfo->address) != NO_PORT_MULT) |
| if (ata_msg_probe(winfo->ataport)) |
| ata_dev_printk(winfo->atadev, |
| KERN_DEBUG, "warning: don't" |
| " know how to handle SATA port" |
| " multiplier\n"); |
| if (SATA_ROOT_PORT(dinfo->address) == |
| winfo->ataport->port_no && |
| SATA_PORT_NUMBER(dinfo->address) == NO_PORT_MULT) { |
| if (ata_msg_probe(winfo->ataport)) |
| ata_dev_printk(winfo->atadev, |
| KERN_DEBUG, |
| "THIS ^^^^^ is the requested" |
| " SATA drive (handle = 0x%p)\n", |
| handle); |
| winfo->sata_adr = dinfo->address; |
| winfo->obj_handle = handle; |
| } |
| } |
| out: |
| kfree(dinfo); |
| out2: |
| kfree(pathname); |
| |
| ret: |
| return status; |
| } |
| |
| /* Get the SATA drive _ADR object. */ |
| static int get_sata_adr(struct device *dev, acpi_handle handle, |
| acpi_integer pcidevfn, unsigned int drive, |
| struct ata_port *ap, |
| struct ata_device *atadev, u32 *dev_adr) |
| { |
| acpi_status status; |
| struct walk_info *winfo; |
| int err = -ENOMEM; |
| |
| winfo = kzalloc(sizeof(struct walk_info), GFP_KERNEL); |
| if (!winfo) |
| goto out; |
| |
| winfo->dev = dev; |
| winfo->atadev = atadev; |
| winfo->ataport = ap; |
| if (acpi_bus_get_device(handle, &winfo->adev) < 0) |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(winfo->atadev, KERN_DEBUG, |
| "acpi_bus_get_device failed\n"); |
| winfo->handle = handle; |
| winfo->pcidevfn = pcidevfn; |
| winfo->drivenum = drive; |
| |
| status = acpi_get_devices(NULL, get_devices, winfo, NULL); |
| if (ACPI_FAILURE(status)) { |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(winfo->atadev, KERN_DEBUG, |
| "%s: acpi_get_devices failed\n", |
| __FUNCTION__); |
| err = -ENODEV; |
| } else { |
| *dev_adr = winfo->sata_adr; |
| atadev->obj_handle = winfo->obj_handle; |
| err = 0; |
| } |
| kfree(winfo); |
| out: |
| return err; |
| } |
| |
| /** |
| * do_drive_get_GTF - get the drive bootup default taskfile settings |
| * @ap: the ata_port for the drive |
| * @ix: target ata_device (drive) index |
| * @gtf_length: number of bytes of _GTF data returned at @gtf_address |
| * @gtf_address: buffer containing _GTF taskfile arrays |
| * |
| * This applies to both PATA and SATA drives. |
| * |
| * The _GTF method has no input parameters. |
| * It returns a variable number of register set values (registers |
| * hex 1F1..1F7, taskfiles). |
| * The <variable number> is not known in advance, so have ACPI-CA |
| * allocate the buffer as needed and return it, then free it later. |
| * |
| * The returned @gtf_length and @gtf_address are only valid if the |
| * function return value is 0. |
| */ |
| static int do_drive_get_GTF(struct ata_port *ap, int ix, |
| unsigned int *gtf_length, unsigned long *gtf_address, |
| unsigned long *obj_loc) |
| { |
| acpi_status status; |
| acpi_handle dev_handle = NULL; |
| acpi_handle chan_handle, drive_handle; |
| acpi_integer pcidevfn = 0; |
| u32 dev_adr; |
| struct acpi_buffer output; |
| union acpi_object *out_obj; |
| struct device *dev = ap->host->dev; |
| struct ata_device *atadev = &ap->device[ix]; |
| int err = -ENODEV; |
| |
| *gtf_length = 0; |
| *gtf_address = 0UL; |
| *obj_loc = 0UL; |
| |
| if (noacpi) |
| return 0; |
| |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
| __FUNCTION__, ap->port_no); |
| |
| if (!ata_dev_enabled(atadev) || (ap->flags & ATA_FLAG_DISABLED)) { |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, "%s: ERR: " |
| "ata_dev_present: %d, PORT_DISABLED: %lu\n", |
| __FUNCTION__, ata_dev_enabled(atadev), |
| ap->flags & ATA_FLAG_DISABLED); |
| goto out; |
| } |
| |
| /* Don't continue if device has no _ADR method. |
| * _GTF is intended for known motherboard devices. */ |
| if (!(ap->cbl == ATA_CBL_SATA)) { |
| err = pata_get_dev_handle(dev, &dev_handle, &pcidevfn); |
| if (err < 0) { |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, |
| "%s: pata_get_dev_handle failed (%d)\n", |
| __FUNCTION__, err); |
| goto out; |
| } |
| } else { |
| err = sata_get_dev_handle(dev, &dev_handle, &pcidevfn); |
| if (err < 0) { |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, |
| "%s: sata_get_dev_handle failed (%d\n", |
| __FUNCTION__, err); |
| goto out; |
| } |
| } |
| |
| /* Get this drive's _ADR info. if not already known. */ |
| if (!atadev->obj_handle) { |
| if (!(ap->cbl == ATA_CBL_SATA)) { |
| /* get child objects of dev_handle == channel objects, |
| * + _their_ children == drive objects */ |
| /* channel is ap->port_no */ |
| chan_handle = acpi_get_child(dev_handle, |
| ap->port_no); |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, |
| "%s: chan adr=%d: chan_handle=0x%p\n", |
| __FUNCTION__, ap->port_no, |
| chan_handle); |
| if (!chan_handle) { |
| err = -ENODEV; |
| goto out; |
| } |
| /* TBD: could also check ACPI object VALID bits */ |
| drive_handle = acpi_get_child(chan_handle, ix); |
| if (!drive_handle) { |
| err = -ENODEV; |
| goto out; |
| } |
| dev_adr = ix; |
| atadev->obj_handle = drive_handle; |
| } else { /* for SATA mode */ |
| dev_adr = SATA_ADR_RSVD; |
| err = get_sata_adr(dev, dev_handle, pcidevfn, 0, |
| ap, atadev, &dev_adr); |
| } |
| if (err < 0 || dev_adr == SATA_ADR_RSVD || |
| !atadev->obj_handle) { |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, |
| "%s: get_sata/pata_adr failed: " |
| "err=%d, dev_adr=%u, obj_handle=0x%p\n", |
| __FUNCTION__, err, dev_adr, |
| atadev->obj_handle); |
| goto out; |
| } |
| } |
| |
| /* Setting up output buffer */ |
| output.length = ACPI_ALLOCATE_BUFFER; |
| output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ |
| |
| /* _GTF has no input parameters */ |
| err = -EIO; |
| status = acpi_evaluate_object(atadev->obj_handle, "_GTF", |
| NULL, &output); |
| if (ACPI_FAILURE(status)) { |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, |
| "%s: Run _GTF error: status = 0x%x\n", |
| __FUNCTION__, status); |
| goto out; |
| } |
| |
| if (!output.length || !output.pointer) { |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, "%s: Run _GTF: " |
| "length or ptr is NULL (0x%llx, 0x%p)\n", |
| __FUNCTION__, |
| (unsigned long long)output.length, |
| output.pointer); |
| kfree(output.pointer); |
| goto out; |
| } |
| |
| out_obj = output.pointer; |
| if (out_obj->type != ACPI_TYPE_BUFFER) { |
| kfree(output.pointer); |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, "%s: Run _GTF: " |
| "error: expected object type of " |
| " ACPI_TYPE_BUFFER, got 0x%x\n", |
| __FUNCTION__, out_obj->type); |
| err = -ENOENT; |
| goto out; |
| } |
| |
| if (!out_obj->buffer.length || !out_obj->buffer.pointer || |
| out_obj->buffer.length % REGS_PER_GTF) { |
| if (ata_msg_drv(ap)) |
| ata_dev_printk(atadev, KERN_ERR, |
| "%s: unexpected GTF length (%d) or addr (0x%p)\n", |
| __FUNCTION__, out_obj->buffer.length, |
| out_obj->buffer.pointer); |
| err = -ENOENT; |
| goto out; |
| } |
| |
| *gtf_length = out_obj->buffer.length; |
| *gtf_address = (unsigned long)out_obj->buffer.pointer; |
| *obj_loc = (unsigned long)out_obj; |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, "%s: returning " |
| "gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n", |
| __FUNCTION__, *gtf_length, *gtf_address, *obj_loc); |
| err = 0; |
| out: |
| return err; |
| } |
| |
| /** |
| * taskfile_load_raw - send taskfile registers to host controller |
| * @ap: Port to which output is sent |
| * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
| * |
| * Outputs ATA taskfile to standard ATA host controller using MMIO |
| * or PIO as indicated by the ATA_FLAG_MMIO flag. |
| * Writes the control, feature, nsect, lbal, lbam, and lbah registers. |
| * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, |
| * hob_lbal, hob_lbam, and hob_lbah. |
| * |
| * This function waits for idle (!BUSY and !DRQ) after writing |
| * registers. If the control register has a new value, this |
| * function also waits for idle after writing control and before |
| * writing the remaining registers. |
| * |
| * LOCKING: TBD: |
| * Inherited from caller. |
| */ |
| static void taskfile_load_raw(struct ata_port *ap, |
| struct ata_device *atadev, |
| const struct taskfile_array *gtf) |
| { |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, "%s: (0x1f1-1f7): hex: " |
| "%02x %02x %02x %02x %02x %02x %02x\n", |
| __FUNCTION__, |
| gtf->tfa[0], gtf->tfa[1], gtf->tfa[2], |
| gtf->tfa[3], gtf->tfa[4], gtf->tfa[5], gtf->tfa[6]); |
| |
| if ((gtf->tfa[0] == 0) && (gtf->tfa[1] == 0) && (gtf->tfa[2] == 0) |
| && (gtf->tfa[3] == 0) && (gtf->tfa[4] == 0) && (gtf->tfa[5] == 0) |
| && (gtf->tfa[6] == 0)) |
| return; |
| |
| if (ap->ops->qc_issue) { |
| struct ata_taskfile tf; |
| unsigned int err; |
| |
| ata_tf_init(atadev, &tf); |
| |
| /* convert gtf to tf */ |
| tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; /* TBD */ |
| tf.protocol = atadev->class == ATA_DEV_ATAPI ? |
| ATA_PROT_ATAPI_NODATA : ATA_PROT_NODATA; |
| tf.feature = gtf->tfa[0]; /* 0x1f1 */ |
| tf.nsect = gtf->tfa[1]; /* 0x1f2 */ |
| tf.lbal = gtf->tfa[2]; /* 0x1f3 */ |
| tf.lbam = gtf->tfa[3]; /* 0x1f4 */ |
| tf.lbah = gtf->tfa[4]; /* 0x1f5 */ |
| tf.device = gtf->tfa[5]; /* 0x1f6 */ |
| tf.command = gtf->tfa[6]; /* 0x1f7 */ |
| |
| err = ata_exec_internal(atadev, &tf, NULL, DMA_NONE, NULL, 0); |
| if (err && ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_ERR, |
| "%s: ata_exec_internal failed: %u\n", |
| __FUNCTION__, err); |
| } else |
| if (ata_msg_warn(ap)) |
| ata_dev_printk(atadev, KERN_WARNING, |
| "%s: SATA driver is missing qc_issue function" |
| " entry points\n", |
| __FUNCTION__); |
| } |
| |
| /** |
| * do_drive_set_taskfiles - write the drive taskfile settings from _GTF |
| * @ap: the ata_port for the drive |
| * @atadev: target ata_device |
| * @gtf_length: total number of bytes of _GTF taskfiles |
| * @gtf_address: location of _GTF taskfile arrays |
| * |
| * This applies to both PATA and SATA drives. |
| * |
| * Write {gtf_address, length gtf_length} in groups of |
| * REGS_PER_GTF bytes. |
| */ |
| static int do_drive_set_taskfiles(struct ata_port *ap, |
| struct ata_device *atadev, unsigned int gtf_length, |
| unsigned long gtf_address) |
| { |
| int err = -ENODEV; |
| int gtf_count = gtf_length / REGS_PER_GTF; |
| int ix; |
| struct taskfile_array *gtf; |
| |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
| __FUNCTION__, ap->port_no); |
| |
| if (noacpi || !(ap->cbl == ATA_CBL_SATA)) |
| return 0; |
| |
| if (!ata_dev_enabled(atadev) || (ap->flags & ATA_FLAG_DISABLED)) |
| goto out; |
| if (!gtf_count) /* shouldn't be here */ |
| goto out; |
| |
| if (gtf_length % REGS_PER_GTF) { |
| if (ata_msg_drv(ap)) |
| ata_dev_printk(atadev, KERN_ERR, |
| "%s: unexpected GTF length (%d)\n", |
| __FUNCTION__, gtf_length); |
| goto out; |
| } |
| |
| for (ix = 0; ix < gtf_count; ix++) { |
| gtf = (struct taskfile_array *) |
| (gtf_address + ix * REGS_PER_GTF); |
| |
| /* send all TaskFile registers (0x1f1-0x1f7) *in*that*order* */ |
| taskfile_load_raw(ap, atadev, gtf); |
| } |
| |
| err = 0; |
| out: |
| return err; |
| } |
| |
| /** |
| * ata_acpi_exec_tfs - get then write drive taskfile settings |
| * @ap: the ata_port for the drive |
| * |
| * This applies to both PATA and SATA drives. |
| */ |
| int ata_acpi_exec_tfs(struct ata_port *ap) |
| { |
| int ix; |
| int ret =0; |
| unsigned int gtf_length; |
| unsigned long gtf_address; |
| unsigned long obj_loc; |
| |
| if (noacpi) |
| return 0; |
| |
| for (ix = 0; ix < ATA_MAX_DEVICES; ix++) { |
| if (!ata_dev_enabled(&ap->device[ix])) |
| continue; |
| |
| ret = do_drive_get_GTF(ap, ix, |
| >f_length, >f_address, &obj_loc); |
| if (ret < 0) { |
| if (ata_msg_probe(ap)) |
| ata_port_printk(ap, KERN_DEBUG, |
| "%s: get_GTF error (%d)\n", |
| __FUNCTION__, ret); |
| break; |
| } |
| |
| ret = do_drive_set_taskfiles(ap, &ap->device[ix], |
| gtf_length, gtf_address); |
| kfree((void *)obj_loc); |
| if (ret < 0) { |
| if (ata_msg_probe(ap)) |
| ata_port_printk(ap, KERN_DEBUG, |
| "%s: set_taskfiles error (%d)\n", |
| __FUNCTION__, ret); |
| break; |
| } |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * ata_acpi_push_id - send Identify data to drive |
| * @ap: the ata_port for the drive |
| * @ix: drive index |
| * |
| * _SDD ACPI object: for SATA mode only |
| * Must be after Identify (Packet) Device -- uses its data |
| * ATM this function never returns a failure. It is an optional |
| * method and if it fails for whatever reason, we should still |
| * just keep going. |
| */ |
| int ata_acpi_push_id(struct ata_port *ap, unsigned int ix) |
| { |
| acpi_handle handle; |
| acpi_integer pcidevfn; |
| int err; |
| struct device *dev = ap->host->dev; |
| struct ata_device *atadev = &ap->device[ix]; |
| u32 dev_adr; |
| acpi_status status; |
| struct acpi_object_list input; |
| union acpi_object in_params[1]; |
| |
| if (noacpi) |
| return 0; |
| |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
| __FUNCTION__, ix, ap->port_no); |
| |
| /* Don't continue if not a SATA device. */ |
| if (!(ap->cbl == ATA_CBL_SATA)) { |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, |
| "%s: Not a SATA device\n", __FUNCTION__); |
| goto out; |
| } |
| |
| /* Don't continue if device has no _ADR method. |
| * _SDD is intended for known motherboard devices. */ |
| err = sata_get_dev_handle(dev, &handle, &pcidevfn); |
| if (err < 0) { |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, |
| "%s: sata_get_dev_handle failed (%d\n", |
| __FUNCTION__, err); |
| goto out; |
| } |
| |
| /* Get this drive's _ADR info, if not already known */ |
| if (!atadev->obj_handle) { |
| dev_adr = SATA_ADR_RSVD; |
| err = get_sata_adr(dev, handle, pcidevfn, ix, ap, atadev, |
| &dev_adr); |
| if (err < 0 || dev_adr == SATA_ADR_RSVD || |
| !atadev->obj_handle) { |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, |
| "%s: get_sata_adr failed: " |
| "err=%d, dev_adr=%u, obj_handle=0x%p\n", |
| __FUNCTION__, err, dev_adr, |
| atadev->obj_handle); |
| goto out; |
| } |
| } |
| |
| /* Give the drive Identify data to the drive via the _SDD method */ |
| /* _SDD: set up input parameters */ |
| input.count = 1; |
| input.pointer = in_params; |
| in_params[0].type = ACPI_TYPE_BUFFER; |
| in_params[0].buffer.length = sizeof(atadev->id[0]) * ATA_ID_WORDS; |
| in_params[0].buffer.pointer = (u8 *)atadev->id; |
| /* Output buffer: _SDD has no output */ |
| |
| /* It's OK for _SDD to be missing too. */ |
| swap_buf_le16(atadev->id, ATA_ID_WORDS); |
| status = acpi_evaluate_object(atadev->obj_handle, "_SDD", &input, NULL); |
| swap_buf_le16(atadev->id, ATA_ID_WORDS); |
| |
| err = ACPI_FAILURE(status) ? -EIO : 0; |
| if (err < 0) { |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(atadev, KERN_DEBUG, |
| "%s _SDD error: status = 0x%x\n", |
| __FUNCTION__, status); |
| } |
| |
| /* always return success */ |
| out: |
| return 0; |
| } |
| |
| |