diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ata/libata-acpi.c | 369 | ||||
| -rw-r--r-- | drivers/ata/libata-core.c | 3 | ||||
| -rw-r--r-- | drivers/ata/libata.h | 2 |
3 files changed, 54 insertions, 320 deletions
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index 02236739b40f..eda4263b4017 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -24,10 +24,8 @@ #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 SATA_ADR(root,pmp) (((root) << 16) | (pmp)) #define REGS_PER_GTF 7 struct taskfile_array { @@ -42,230 +40,64 @@ static int is_pci_dev(struct device *dev) return (dev->bus == &pci_bus_type); } -/** - * 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) +static void ata_acpi_associate_sata_port(struct ata_port *ap) { - struct pci_dev *pci_dev; - acpi_integer addr; - - if (!is_pci_dev(dev)) - return -ENODEV; - - 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; + acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT); + + ap->device->acpi_handle = acpi_get_child(ap->host->acpi_handle, adr); } -/** - * 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) +static void ata_acpi_associate_ide_port(struct ata_port *ap) { - 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; - - if (!is_pci_dev(dev)) - return -ENODEV; - - 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; - } + int max_devices, i; - 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; -}; + ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no); + if (!ap->acpi_handle) + return; -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; - } + max_devices = 1; + if (ap->flags & ATA_FLAG_SLAVE_POSS) + max_devices++; - /* if basepath is not yet known, ignore this object */ - if (!winfo->basepath_len) - goto out; + for (i = 0; i < max_devices; i++) { + struct ata_device *dev = &ap->device[i]; - /* 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; - } + dev->acpi_handle = acpi_get_child(ap->acpi_handle, i); } -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) +/** + * ata_acpi_associate - associate ATA host with ACPI objects + * @host: target ATA host + * + * Look up ACPI objects associated with @host and initialize + * acpi_handle fields of @host, its ports and devices accordingly. + * + * LOCKING: + * EH context. + * + * RETURNS: + * 0 on success, -errno on failure. + */ +void ata_acpi_associate(struct ata_host *host) { - acpi_status status; - struct walk_info *winfo; - int err = -ENOMEM; + int i; - winfo = kzalloc(sizeof(struct walk_info), GFP_KERNEL); - if (!winfo) - goto out; + if (!is_pci_dev(host->dev) || libata_noacpi) + return; - 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; + host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev); + if (!host->acpi_handle) + return; - 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; + for (i = 0; i < host->n_ports; i++) { + struct ata_port *ap = host->ports[i]; + + if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA) + ata_acpi_associate_sata_port(ap); + else + ata_acpi_associate_ide_port(ap); } - kfree(winfo); -out: - return err; } /** @@ -290,20 +122,15 @@ static int do_drive_get_GTF(struct ata_device *dev, unsigned int *gtf_length, { struct ata_port *ap = dev->ap; 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 *gdev = ap->host->dev; int err = -ENODEV; *gtf_length = 0; *gtf_address = 0UL; *obj_loc = 0UL; - if (libata_noacpi) + if (!dev->acpi_handle) return 0; if (ata_msg_probe(ap)) @@ -319,78 +146,14 @@ static int do_drive_get_GTF(struct ata_device *dev, unsigned int *gtf_length, goto out; } - /* Don't continue if device has no _ADR method. - * _GTF is intended for known motherboard devices. */ - if (!(ap->flags & ATA_FLAG_ACPI_SATA)) { - err = pata_get_dev_handle(gdev, &dev_handle, &pcidevfn); - if (err < 0) { - if (ata_msg_probe(ap)) - ata_dev_printk(dev, KERN_DEBUG, - "%s: pata_get_dev_handle failed (%d)\n", - __FUNCTION__, err); - goto out; - } - } else { - err = sata_get_dev_handle(gdev, &dev_handle, &pcidevfn); - if (err < 0) { - if (ata_msg_probe(ap)) - ata_dev_printk(dev, 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 (!dev->obj_handle) { - if (!(ap->flags & ATA_FLAG_ACPI_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(dev, 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, dev->devno); - if (!drive_handle) { - err = -ENODEV; - goto out; - } - dev_adr = dev->devno; - dev->obj_handle = drive_handle; - } else { /* for SATA mode */ - dev_adr = SATA_ADR_RSVD; - err = get_sata_adr(gdev, dev_handle, pcidevfn, 0, - ap, dev, &dev_adr); - } - if (err < 0 || dev_adr == SATA_ADR_RSVD || - !dev->obj_handle) { - if (ata_msg_probe(ap)) - ata_dev_printk(dev, KERN_DEBUG, - "%s: get_sata/pata_adr failed: " - "err=%d, dev_adr=%u, obj_handle=0x%p\n", - __FUNCTION__, err, dev_adr, - dev->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(dev->obj_handle, "_GTF", - NULL, &output); + status = acpi_evaluate_object(dev->acpi_handle, "_GTF", + NULL, &output); if (ACPI_FAILURE(status)) { if (ata_msg_probe(ap)) ata_dev_printk(dev, KERN_DEBUG, @@ -528,7 +291,7 @@ static int do_drive_set_taskfiles(struct ata_device *dev, ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n", __FUNCTION__, ap->port_no); - if (libata_noacpi || !(ap->flags & ATA_FLAG_ACPI_SATA)) + if (!(ap->flags & ATA_FLAG_ACPI_SATA)) return 0; if (!ata_dev_enabled(dev) || (ap->flags & ATA_FLAG_DISABLED)) @@ -571,8 +334,6 @@ int ata_acpi_exec_tfs(struct ata_port *ap) unsigned long gtf_address; unsigned long obj_loc; - if (libata_noacpi) - return 0; /* * TBD - implement PATA support. For now, * we should not run GTF on PATA devices since some @@ -624,16 +385,12 @@ int ata_acpi_exec_tfs(struct ata_port *ap) int ata_acpi_push_id(struct ata_device *dev) { struct ata_port *ap = dev->ap; - acpi_handle handle; - acpi_integer pcidevfn; int err; - struct device *gdev = ap->host->dev; - u32 dev_adr; acpi_status status; struct acpi_object_list input; union acpi_object in_params[1]; - if (libata_noacpi) + if (!dev->acpi_handle) return 0; if (ata_msg_probe(ap)) @@ -648,34 +405,6 @@ int ata_acpi_push_id(struct ata_device *dev) goto out; } - /* Don't continue if device has no _ADR method. - * _SDD is intended for known motherboard devices. */ - err = sata_get_dev_handle(gdev, &handle, &pcidevfn); - if (err < 0) { - if (ata_msg_probe(ap)) - ata_dev_printk(dev, 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 (!dev->obj_handle) { - dev_adr = SATA_ADR_RSVD; - err = get_sata_adr(gdev, handle, pcidevfn, dev->devno, ap, dev, - &dev_adr); - if (err < 0 || dev_adr == SATA_ADR_RSVD || - !dev->obj_handle) { - if (ata_msg_probe(ap)) - ata_dev_printk(dev, KERN_DEBUG, - "%s: get_sata_adr failed: " - "err=%d, dev_adr=%u, obj_handle=0x%p\n", - __FUNCTION__, err, dev_adr, - dev->obj_handle); - goto out; - } - } - /* Give the drive Identify data to the drive via the _SDD method */ /* _SDD: set up input parameters */ input.count = 1; @@ -687,7 +416,7 @@ int ata_acpi_push_id(struct ata_device *dev) /* It's OK for _SDD to be missing too. */ swap_buf_le16(dev->id, ATA_ID_WORDS); - status = acpi_evaluate_object(dev->obj_handle, "_SDD", &input, NULL); + status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); swap_buf_le16(dev->id, ATA_ID_WORDS); err = ACPI_FAILURE(status) ? -EIO : 0; diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 981b397cb46b..5a46cdebc588 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -6293,6 +6293,9 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) if (rc) return rc; + /* associate with ACPI nodes */ + ata_acpi_associate(host); + /* set cable, sata_spd_limit and report */ for (i = 0; i < host->n_ports; i++) { struct ata_port *ap = host->ports[i]; diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 5e2466658420..29037cd7c651 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -98,9 +98,11 @@ extern struct ata_port *ata_port_alloc(struct ata_host *host); /* libata-acpi.c */ #ifdef CONFIG_ATA_ACPI +extern void ata_acpi_associate(struct ata_host *host); extern int ata_acpi_exec_tfs(struct ata_port *ap); extern int ata_acpi_push_id(struct ata_device *dev); #else +static inline void ata_acpi_associate(struct ata_host *host) { } static inline int ata_acpi_exec_tfs(struct ata_port *ap) { return 0; |