| /* |
| * libata-acpi.c |
| * Provides ACPI support for PATA/SATA. |
| * |
| * Copyright (C) 2006 Intel Corp. |
| * Copyright (C) 2006 Randy Dunlap |
| */ |
| |
| #include <linux/module.h> |
| #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 <linux/slab.h> |
| #include <linux/pm_runtime.h> |
| #include <scsi/scsi_device.h> |
| #include "libata.h" |
| |
| #include <acpi/acpi_bus.h> |
| |
| unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; |
| module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); |
| MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock, 0x4=DIPM, 0x8=FPDMA non-zero offset, 0x10=FPDMA DMA Setup FIS auto-activate)"); |
| |
| #define NO_PORT_MULT 0xffff |
| #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) |
| |
| #define REGS_PER_GTF 7 |
| struct ata_acpi_gtf { |
| u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ |
| } __packed; |
| |
| /* |
| * Helper - belongs in the PCI layer somewhere eventually |
| */ |
| static int is_pci_dev(struct device *dev) |
| { |
| return (dev->bus == &pci_bus_type); |
| } |
| |
| static void ata_acpi_clear_gtf(struct ata_device *dev) |
| { |
| kfree(dev->gtf_cache); |
| dev->gtf_cache = NULL; |
| } |
| |
| /** |
| * ata_ap_acpi_handle - provide the acpi_handle for an ata_port |
| * @ap: the acpi_handle returned will correspond to this port |
| * |
| * Returns the acpi_handle for the ACPI namespace object corresponding to |
| * the ata_port passed into the function, or NULL if no such object exists |
| */ |
| acpi_handle ata_ap_acpi_handle(struct ata_port *ap) |
| { |
| if (ap->flags & ATA_FLAG_ACPI_SATA) |
| return NULL; |
| |
| return ap->scsi_host ? |
| DEVICE_ACPI_HANDLE(&ap->scsi_host->shost_gendev) : NULL; |
| } |
| EXPORT_SYMBOL(ata_ap_acpi_handle); |
| |
| /** |
| * ata_dev_acpi_handle - provide the acpi_handle for an ata_device |
| * @dev: the acpi_device returned will correspond to this port |
| * |
| * Returns the acpi_handle for the ACPI namespace object corresponding to |
| * the ata_device passed into the function, or NULL if no such object exists |
| */ |
| acpi_handle ata_dev_acpi_handle(struct ata_device *dev) |
| { |
| acpi_integer adr; |
| struct ata_port *ap = dev->link->ap; |
| |
| if (dev->flags & ATA_DFLAG_ACPI_DISABLED) |
| return NULL; |
| |
| if (ap->flags & ATA_FLAG_ACPI_SATA) { |
| if (!sata_pmp_attached(ap)) |
| adr = SATA_ADR(ap->port_no, NO_PORT_MULT); |
| else |
| adr = SATA_ADR(ap->port_no, dev->link->pmp); |
| return acpi_get_child(DEVICE_ACPI_HANDLE(ap->host->dev), adr); |
| } else |
| return acpi_get_child(ata_ap_acpi_handle(ap), dev->devno); |
| } |
| EXPORT_SYMBOL(ata_dev_acpi_handle); |
| |
| /* @ap and @dev are the same as ata_acpi_handle_hotplug() */ |
| static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) |
| { |
| if (dev) |
| dev->flags |= ATA_DFLAG_DETACH; |
| else { |
| struct ata_link *tlink; |
| struct ata_device *tdev; |
| |
| ata_for_each_link(tlink, ap, EDGE) |
| ata_for_each_dev(tdev, tlink, ALL) |
| tdev->flags |= ATA_DFLAG_DETACH; |
| } |
| |
| ata_port_schedule_eh(ap); |
| } |
| |
| /** |
| * ata_acpi_handle_hotplug - ACPI event handler backend |
| * @ap: ATA port ACPI event occurred |
| * @dev: ATA device ACPI event occurred (can be NULL) |
| * @event: ACPI event which occurred |
| * |
| * All ACPI bay / device realted events end up in this function. If |
| * the event is port-wide @dev is NULL. If the event is specific to a |
| * device, @dev points to it. |
| * |
| * Hotplug (as opposed to unplug) notification is always handled as |
| * port-wide while unplug only kills the target device on device-wide |
| * event. |
| * |
| * LOCKING: |
| * ACPI notify handler context. May sleep. |
| */ |
| static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev, |
| u32 event) |
| { |
| struct ata_eh_info *ehi = &ap->link.eh_info; |
| int wait = 0; |
| unsigned long flags; |
| |
| spin_lock_irqsave(ap->lock, flags); |
| /* |
| * When dock driver calls into the routine, it will always use |
| * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and |
| * ACPI_NOTIFY_EJECT_REQUEST for remove |
| */ |
| switch (event) { |
| case ACPI_NOTIFY_BUS_CHECK: |
| case ACPI_NOTIFY_DEVICE_CHECK: |
| ata_ehi_push_desc(ehi, "ACPI event"); |
| |
| ata_ehi_hotplugged(ehi); |
| ata_port_freeze(ap); |
| break; |
| case ACPI_NOTIFY_EJECT_REQUEST: |
| ata_ehi_push_desc(ehi, "ACPI event"); |
| |
| ata_acpi_detach_device(ap, dev); |
| wait = 1; |
| break; |
| } |
| |
| spin_unlock_irqrestore(ap->lock, flags); |
| |
| if (wait) |
| ata_port_wait_eh(ap); |
| } |
| |
| static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data) |
| { |
| struct ata_device *dev = data; |
| |
| ata_acpi_handle_hotplug(dev->link->ap, dev, event); |
| } |
| |
| static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) |
| { |
| struct ata_port *ap = data; |
| |
| ata_acpi_handle_hotplug(ap, NULL, event); |
| } |
| |
| static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, |
| u32 event) |
| { |
| struct kobject *kobj = NULL; |
| char event_string[20]; |
| char *envp[] = { event_string, NULL }; |
| |
| if (dev) { |
| if (dev->sdev) |
| kobj = &dev->sdev->sdev_gendev.kobj; |
| } else |
| kobj = &ap->dev->kobj; |
| |
| if (kobj) { |
| snprintf(event_string, 20, "BAY_EVENT=%d", event); |
| kobject_uevent_env(kobj, KOBJ_CHANGE, envp); |
| } |
| } |
| |
| static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data) |
| { |
| ata_acpi_uevent(data, NULL, event); |
| } |
| |
| static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data) |
| { |
| struct ata_device *dev = data; |
| ata_acpi_uevent(dev->link->ap, dev, event); |
| } |
| |
| static const struct acpi_dock_ops ata_acpi_dev_dock_ops = { |
| .handler = ata_acpi_dev_notify_dock, |
| .uevent = ata_acpi_dev_uevent, |
| }; |
| |
| static const struct acpi_dock_ops ata_acpi_ap_dock_ops = { |
| .handler = ata_acpi_ap_notify_dock, |
| .uevent = ata_acpi_ap_uevent, |
| }; |
| |
| /** |
| * ata_acpi_dissociate - dissociate ATA host from ACPI objects |
| * @host: target ATA host |
| * |
| * This function is called during driver detach after the whole host |
| * is shut down. |
| * |
| * LOCKING: |
| * EH context. |
| */ |
| void ata_acpi_dissociate(struct ata_host *host) |
| { |
| int i; |
| |
| /* Restore initial _GTM values so that driver which attaches |
| * afterward can use them too. |
| */ |
| for (i = 0; i < host->n_ports; i++) { |
| struct ata_port *ap = host->ports[i]; |
| const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
| |
| if (ata_ap_acpi_handle(ap) && gtm) |
| ata_acpi_stm(ap, gtm); |
| } |
| } |
| |
| static int __ata_acpi_gtm(struct ata_port *ap, acpi_handle handle, |
| struct ata_acpi_gtm *gtm) |
| { |
| struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; |
| union acpi_object *out_obj; |
| acpi_status status; |
| int rc = 0; |
| |
| status = acpi_evaluate_object(handle, "_GTM", NULL, &output); |
| |
| rc = -ENOENT; |
| if (status == AE_NOT_FOUND) |
| goto out_free; |
| |
| rc = -EINVAL; |
| if (ACPI_FAILURE(status)) { |
| ata_port_err(ap, "ACPI get timing mode failed (AE 0x%x)\n", |
| status); |
| goto out_free; |
| } |
| |
| out_obj = output.pointer; |
| if (out_obj->type != ACPI_TYPE_BUFFER) { |
| ata_port_warn(ap, "_GTM returned unexpected object type 0x%x\n", |
| out_obj->type); |
| |
| goto out_free; |
| } |
| |
| if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { |
| ata_port_err(ap, "_GTM returned invalid length %d\n", |
| out_obj->buffer.length); |
| goto out_free; |
| } |
| |
| memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); |
| rc = 0; |
| out_free: |
| kfree(output.pointer); |
| return rc; |
| } |
| |
| /** |
| * ata_acpi_gtm - execute _GTM |
| * @ap: target ATA port |
| * @gtm: out parameter for _GTM result |
| * |
| * Evaluate _GTM and store the result in @gtm. |
| * |
| * LOCKING: |
| * EH context. |
| * |
| * RETURNS: |
| * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. |
| */ |
| int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) |
| { |
| if (ata_ap_acpi_handle(ap)) |
| return __ata_acpi_gtm(ap, ata_ap_acpi_handle(ap), gtm); |
| else |
| return -EINVAL; |
| } |
| |
| EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
| |
| /** |
| * ata_acpi_stm - execute _STM |
| * @ap: target ATA port |
| * @stm: timing parameter to _STM |
| * |
| * Evaluate _STM with timing parameter @stm. |
| * |
| * LOCKING: |
| * EH context. |
| * |
| * RETURNS: |
| * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. |
| */ |
| int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
| { |
| acpi_status status; |
| struct ata_acpi_gtm stm_buf = *stm; |
| struct acpi_object_list input; |
| union acpi_object in_params[3]; |
| |
| in_params[0].type = ACPI_TYPE_BUFFER; |
| in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); |
| in_params[0].buffer.pointer = (u8 *)&stm_buf; |
| /* Buffers for id may need byteswapping ? */ |
| in_params[1].type = ACPI_TYPE_BUFFER; |
| in_params[1].buffer.length = 512; |
| in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
| in_params[2].type = ACPI_TYPE_BUFFER; |
| in_params[2].buffer.length = 512; |
| in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
| |
| input.count = 3; |
| input.pointer = in_params; |
| |
| status = acpi_evaluate_object(ata_ap_acpi_handle(ap), "_STM", &input, |
| NULL); |
| |
| if (status == AE_NOT_FOUND) |
| return -ENOENT; |
| if (ACPI_FAILURE(status)) { |
| ata_port_err(ap, "ACPI set timing mode failed (status=0x%x)\n", |
| status); |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| EXPORT_SYMBOL_GPL(ata_acpi_stm); |
| |
| /** |
| * ata_dev_get_GTF - get the drive bootup default taskfile settings |
| * @dev: target ATA device |
| * @gtf: output parameter for 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. |
| * |
| * LOCKING: |
| * EH context. |
| * |
| * RETURNS: |
| * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
| * if _GTF is invalid. |
| */ |
| static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
| { |
| struct ata_port *ap = dev->link->ap; |
| acpi_status status; |
| struct acpi_buffer output; |
| union acpi_object *out_obj; |
| int rc = 0; |
| |
| /* if _GTF is cached, use the cached value */ |
| if (dev->gtf_cache) { |
| out_obj = dev->gtf_cache; |
| goto done; |
| } |
| |
| /* set up output buffer */ |
| output.length = ACPI_ALLOCATE_BUFFER; |
| output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ |
| |
| if (ata_msg_probe(ap)) |
| ata_dev_dbg(dev, "%s: ENTER: port#: %d\n", |
| __func__, ap->port_no); |
| |
| /* _GTF has no input parameters */ |
| status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_GTF", NULL, |
| &output); |
| out_obj = dev->gtf_cache = output.pointer; |
| |
| if (ACPI_FAILURE(status)) { |
| if (status != AE_NOT_FOUND) { |
| ata_dev_warn(dev, "_GTF evaluation failed (AE 0x%x)\n", |
| status); |
| rc = -EINVAL; |
| } |
| goto out_free; |
| } |
| |
| if (!output.length || !output.pointer) { |
| if (ata_msg_probe(ap)) |
| ata_dev_dbg(dev, "%s: Run _GTF: length or ptr is NULL (0x%llx, 0x%p)\n", |
| __func__, |
| (unsigned long long)output.length, |
| output.pointer); |
| rc = -EINVAL; |
| goto out_free; |
| } |
| |
| if (out_obj->type != ACPI_TYPE_BUFFER) { |
| ata_dev_warn(dev, "_GTF unexpected object type 0x%x\n", |
| out_obj->type); |
| rc = -EINVAL; |
| goto out_free; |
| } |
| |
| if (out_obj->buffer.length % REGS_PER_GTF) { |
| ata_dev_warn(dev, "unexpected _GTF length (%d)\n", |
| out_obj->buffer.length); |
| rc = -EINVAL; |
| goto out_free; |
| } |
| |
| done: |
| rc = out_obj->buffer.length / REGS_PER_GTF; |
| if (gtf) { |
| *gtf = (void *)out_obj->buffer.pointer; |
| if (ata_msg_probe(ap)) |
| ata_dev_dbg(dev, "%s: returning gtf=%p, gtf_count=%d\n", |
| __func__, *gtf, rc); |
| } |
| return rc; |
| |
| out_free: |
| ata_acpi_clear_gtf(dev); |
| return rc; |
| } |
| |
| /** |
| * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter |
| * @dev: target device |
| * @gtm: GTM parameter to use |
| * |
| * Determine xfermask for @dev from @gtm. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Determined xfermask. |
| */ |
| unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, |
| const struct ata_acpi_gtm *gtm) |
| { |
| unsigned long xfer_mask = 0; |
| unsigned int type; |
| int unit; |
| u8 mode; |
| |
| /* we always use the 0 slot for crap hardware */ |
| unit = dev->devno; |
| if (!(gtm->flags & 0x10)) |
| unit = 0; |
| |
| /* PIO */ |
| mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); |
| xfer_mask |= ata_xfer_mode2mask(mode); |
| |
| /* See if we have MWDMA or UDMA data. We don't bother with |
| * MWDMA if UDMA is available as this means the BIOS set UDMA |
| * and our error changedown if it works is UDMA to PIO anyway. |
| */ |
| if (!(gtm->flags & (1 << (2 * unit)))) |
| type = ATA_SHIFT_MWDMA; |
| else |
| type = ATA_SHIFT_UDMA; |
| |
| mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); |
| xfer_mask |= ata_xfer_mode2mask(mode); |
| |
| return xfer_mask; |
| } |
| EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); |
| |
| /** |
| * ata_acpi_cbl_80wire - Check for 80 wire cable |
| * @ap: Port to check |
| * @gtm: GTM data to use |
| * |
| * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
| */ |
| int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
| { |
| struct ata_device *dev; |
| |
| ata_for_each_dev(dev, &ap->link, ENABLED) { |
| unsigned long xfer_mask, udma_mask; |
| |
| xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); |
| ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); |
| |
| if (udma_mask & ~ATA_UDMA_MASK_40C) |
| return 1; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
| |
| static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
| const struct ata_acpi_gtf *gtf, |
| struct ata_taskfile *tf) |
| { |
| ata_tf_init(dev, tf); |
| |
| tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| tf->protocol = ATA_PROT_NODATA; |
| tf->feature = gtf->tf[0]; /* 0x1f1 */ |
| tf->nsect = gtf->tf[1]; /* 0x1f2 */ |
| tf->lbal = gtf->tf[2]; /* 0x1f3 */ |
| tf->lbam = gtf->tf[3]; /* 0x1f4 */ |
| tf->lbah = gtf->tf[4]; /* 0x1f5 */ |
| tf->device = gtf->tf[5]; /* 0x1f6 */ |
| tf->command = gtf->tf[6]; /* 0x1f7 */ |
| } |
| |
| static int ata_acpi_filter_tf(struct ata_device *dev, |
| const struct ata_taskfile *tf, |
| const struct ata_taskfile *ptf) |
| { |
| if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) { |
| /* libata doesn't use ACPI to configure transfer mode. |
| * It will only confuse device configuration. Skip. |
| */ |
| if (tf->command == ATA_CMD_SET_FEATURES && |
| tf->feature == SETFEATURES_XFER) |
| return 1; |
| } |
| |
| if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) { |
| /* BIOS writers, sorry but we don't wanna lock |
| * features unless the user explicitly said so. |
| */ |
| |
| /* DEVICE CONFIGURATION FREEZE LOCK */ |
| if (tf->command == ATA_CMD_CONF_OVERLAY && |
| tf->feature == ATA_DCO_FREEZE_LOCK) |
| return 1; |
| |
| /* SECURITY FREEZE LOCK */ |
| if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) |
| return 1; |
| |
| /* SET MAX LOCK and SET MAX FREEZE LOCK */ |
| if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && |
| tf->command == ATA_CMD_SET_MAX && |
| (tf->feature == ATA_SET_MAX_LOCK || |
| tf->feature == ATA_SET_MAX_FREEZE_LOCK)) |
| return 1; |
| } |
| |
| if (tf->command == ATA_CMD_SET_FEATURES && |
| tf->feature == SETFEATURES_SATA_ENABLE) { |
| /* inhibit enabling DIPM */ |
| if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM && |
| tf->nsect == SATA_DIPM) |
| return 1; |
| |
| /* inhibit FPDMA non-zero offset */ |
| if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET && |
| (tf->nsect == SATA_FPDMA_OFFSET || |
| tf->nsect == SATA_FPDMA_IN_ORDER)) |
| return 1; |
| |
| /* inhibit FPDMA auto activation */ |
| if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA && |
| tf->nsect == SATA_FPDMA_AA) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ata_acpi_run_tf - send taskfile registers to host controller |
| * @dev: target ATA device |
| * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
| * |
| * Outputs ATA taskfile to standard ATA host controller. |
| * 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: |
| * EH context. |
| * |
| * RETURNS: |
| * 1 if command is executed successfully. 0 if ignored, rejected or |
| * filtered out, -errno on other errors. |
| */ |
| static int ata_acpi_run_tf(struct ata_device *dev, |
| const struct ata_acpi_gtf *gtf, |
| const struct ata_acpi_gtf *prev_gtf) |
| { |
| struct ata_taskfile *pptf = NULL; |
| struct ata_taskfile tf, ptf, rtf; |
| unsigned int err_mask; |
| const char *level; |
| const char *descr; |
| char msg[60]; |
| int rc; |
| |
| if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
| && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) |
| && (gtf->tf[6] == 0)) |
| return 0; |
| |
| ata_acpi_gtf_to_tf(dev, gtf, &tf); |
| if (prev_gtf) { |
| ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); |
| pptf = &ptf; |
| } |
| |
| if (!ata_acpi_filter_tf(dev, &tf, pptf)) { |
| rtf = tf; |
| err_mask = ata_exec_internal(dev, &rtf, NULL, |
| DMA_NONE, NULL, 0, 0); |
| |
| switch (err_mask) { |
| case 0: |
| level = KERN_DEBUG; |
| snprintf(msg, sizeof(msg), "succeeded"); |
| rc = 1; |
| break; |
| |
| case AC_ERR_DEV: |
| level = KERN_INFO; |
| snprintf(msg, sizeof(msg), |
| "rejected by device (Stat=0x%02x Err=0x%02x)", |
| rtf.command, rtf.feature); |
| rc = 0; |
| break; |
| |
| default: |
| level = KERN_ERR; |
| snprintf(msg, sizeof(msg), |
| "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", |
| err_mask, rtf.command, rtf.feature); |
| rc = -EIO; |
| break; |
| } |
| } else { |
| level = KERN_INFO; |
| snprintf(msg, sizeof(msg), "filtered out"); |
| rc = 0; |
| } |
| descr = ata_get_cmd_descript(tf.command); |
| |
| ata_dev_printk(dev, level, |
| "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n", |
| tf.command, tf.feature, tf.nsect, tf.lbal, |
| tf.lbam, tf.lbah, tf.device, |
| (descr ? descr : "unknown"), msg); |
| |
| return rc; |
| } |
| |
| /** |
| * ata_acpi_exec_tfs - get then write drive taskfile settings |
| * @dev: target ATA device |
| * @nr_executed: out parameter for the number of executed commands |
| * |
| * Evaluate _GTF and execute returned taskfiles. |
| * |
| * LOCKING: |
| * EH context. |
| * |
| * RETURNS: |
| * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
| * -errno on other errors. |
| */ |
| static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
| { |
| struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
| int gtf_count, i, rc; |
| |
| /* get taskfiles */ |
| rc = ata_dev_get_GTF(dev, >f); |
| if (rc < 0) |
| return rc; |
| gtf_count = rc; |
| |
| /* execute them */ |
| for (i = 0; i < gtf_count; i++, gtf++) { |
| rc = ata_acpi_run_tf(dev, gtf, pgtf); |
| if (rc < 0) |
| break; |
| if (rc) { |
| (*nr_executed)++; |
| pgtf = gtf; |
| } |
| } |
| |
| ata_acpi_clear_gtf(dev); |
| |
| if (rc < 0) |
| return rc; |
| return 0; |
| } |
| |
| /** |
| * ata_acpi_push_id - send Identify data to drive |
| * @dev: target ATA device |
| * |
| * _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. |
| * |
| * LOCKING: |
| * EH context. |
| * |
| * RETURNS: |
| * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure. |
| */ |
| static int ata_acpi_push_id(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| acpi_status status; |
| struct acpi_object_list input; |
| union acpi_object in_params[1]; |
| |
| if (ata_msg_probe(ap)) |
| ata_dev_dbg(dev, "%s: ix = %d, port#: %d\n", |
| __func__, dev->devno, ap->port_no); |
| |
| /* 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(dev->id[0]) * ATA_ID_WORDS; |
| in_params[0].buffer.pointer = (u8 *)dev->id; |
| /* Output buffer: _SDD has no output */ |
| |
| /* It's OK for _SDD to be missing too. */ |
| swap_buf_le16(dev->id, ATA_ID_WORDS); |
| status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_SDD", &input, |
| NULL); |
| swap_buf_le16(dev->id, ATA_ID_WORDS); |
| |
| if (status == AE_NOT_FOUND) |
| return -ENOENT; |
| |
| if (ACPI_FAILURE(status)) { |
| ata_dev_warn(dev, "ACPI _SDD failed (AE 0x%x)\n", status); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ata_acpi_on_suspend - ATA ACPI hook called on suspend |
| * @ap: target ATA port |
| * |
| * This function is called when @ap is about to be suspended. All |
| * devices are already put to sleep but the port_suspend() callback |
| * hasn't been executed yet. Error return from this function aborts |
| * suspend. |
| * |
| * LOCKING: |
| * EH context. |
| * |
| * RETURNS: |
| * 0 on success, -errno on failure. |
| */ |
| int ata_acpi_on_suspend(struct ata_port *ap) |
| { |
| /* nada */ |
| return 0; |
| } |
| |
| /** |
| * ata_acpi_on_resume - ATA ACPI hook called on resume |
| * @ap: target ATA port |
| * |
| * This function is called when @ap is resumed - right after port |
| * itself is resumed but before any EH action is taken. |
| * |
| * LOCKING: |
| * EH context. |
| */ |
| void ata_acpi_on_resume(struct ata_port *ap) |
| { |
| const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
| struct ata_device *dev; |
| |
| if (ata_ap_acpi_handle(ap) && gtm) { |
| /* _GTM valid */ |
| |
| /* restore timing parameters */ |
| ata_acpi_stm(ap, gtm); |
| |
| /* _GTF should immediately follow _STM so that it can |
| * use values set by _STM. Cache _GTF result and |
| * schedule _GTF. |
| */ |
| ata_for_each_dev(dev, &ap->link, ALL) { |
| ata_acpi_clear_gtf(dev); |
| if (ata_dev_enabled(dev) && |
| ata_dev_get_GTF(dev, NULL) >= 0) |
| dev->flags |= ATA_DFLAG_ACPI_PENDING; |
| } |
| } else { |
| /* SATA _GTF needs to be evaulated after _SDD and |
| * there's no reason to evaluate IDE _GTF early |
| * without _STM. Clear cache and schedule _GTF. |
| */ |
| ata_for_each_dev(dev, &ap->link, ALL) { |
| ata_acpi_clear_gtf(dev); |
| if (ata_dev_enabled(dev)) |
| dev->flags |= ATA_DFLAG_ACPI_PENDING; |
| } |
| } |
| } |
| |
| static int ata_acpi_choose_suspend_state(struct ata_device *dev, bool runtime) |
| { |
| int d_max_in = ACPI_STATE_D3_COLD; |
| if (!runtime) |
| goto out; |
| |
| /* |
| * For ATAPI, runtime D3 cold is only allowed |
| * for ZPODD in zero power ready state |
| */ |
| if (dev->class == ATA_DEV_ATAPI && |
| !(zpodd_dev_enabled(dev) && zpodd_zpready(dev))) |
| d_max_in = ACPI_STATE_D3_HOT; |
| |
| out: |
| return acpi_pm_device_sleep_state(&dev->sdev->sdev_gendev, |
| NULL, d_max_in); |
| } |
| |
| static void sata_acpi_set_state(struct ata_port *ap, pm_message_t state) |
| { |
| bool runtime = PMSG_IS_AUTO(state); |
| struct ata_device *dev; |
| acpi_handle handle; |
| int acpi_state; |
| |
| ata_for_each_dev(dev, &ap->link, ENABLED) { |
| handle = ata_dev_acpi_handle(dev); |
| if (!handle) |
| continue; |
| |
| if (!(state.event & PM_EVENT_RESUME)) { |
| acpi_state = ata_acpi_choose_suspend_state(dev, runtime); |
| if (acpi_state == ACPI_STATE_D0) |
| continue; |
| if (runtime && zpodd_dev_enabled(dev) && |
| acpi_state == ACPI_STATE_D3_COLD) |
| zpodd_enable_run_wake(dev); |
| acpi_bus_set_power(handle, acpi_state); |
| } else { |
| if (runtime && zpodd_dev_enabled(dev)) |
| zpodd_disable_run_wake(dev); |
| acpi_bus_set_power(handle, ACPI_STATE_D0); |
| } |
| } |
| } |
| |
| /* ACPI spec requires _PS0 when IDE power on and _PS3 when power off */ |
| static void pata_acpi_set_state(struct ata_port *ap, pm_message_t state) |
| { |
| struct ata_device *dev; |
| acpi_handle port_handle; |
| |
| port_handle = ata_ap_acpi_handle(ap); |
| if (!port_handle) |
| return; |
| |
| /* channel first and then drives for power on and vica versa |
| for power off */ |
| if (state.event & PM_EVENT_RESUME) |
| acpi_bus_set_power(port_handle, ACPI_STATE_D0); |
| |
| ata_for_each_dev(dev, &ap->link, ENABLED) { |
| acpi_handle dev_handle = ata_dev_acpi_handle(dev); |
| if (!dev_handle) |
| continue; |
| |
| acpi_bus_set_power(dev_handle, state.event & PM_EVENT_RESUME ? |
| ACPI_STATE_D0 : ACPI_STATE_D3); |
| } |
| |
| if (!(state.event & PM_EVENT_RESUME)) |
| acpi_bus_set_power(port_handle, ACPI_STATE_D3); |
| } |
| |
| /** |
| * ata_acpi_set_state - set the port power state |
| * @ap: target ATA port |
| * @state: state, on/off |
| * |
| * This function sets a proper ACPI D state for the device on |
| * system and runtime PM operations. |
| */ |
| void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) |
| { |
| if (ap->flags & ATA_FLAG_ACPI_SATA) |
| sata_acpi_set_state(ap, state); |
| else |
| pata_acpi_set_state(ap, state); |
| } |
| |
| /** |
| * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration |
| * @dev: target ATA device |
| * |
| * This function is called when @dev is about to be configured. |
| * IDENTIFY data might have been modified after this hook is run. |
| * |
| * LOCKING: |
| * EH context. |
| * |
| * RETURNS: |
| * Positive number if IDENTIFY data needs to be refreshed, 0 if not, |
| * -errno on failure. |
| */ |
| int ata_acpi_on_devcfg(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| struct ata_eh_context *ehc = &ap->link.eh_context; |
| int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
| int nr_executed = 0; |
| int rc; |
| |
| if (!ata_dev_acpi_handle(dev)) |
| return 0; |
| |
| /* do we need to do _GTF? */ |
| if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && |
| !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) |
| return 0; |
| |
| /* do _SDD if SATA */ |
| if (acpi_sata) { |
| rc = ata_acpi_push_id(dev); |
| if (rc && rc != -ENOENT) |
| goto acpi_err; |
| } |
| |
| /* do _GTF */ |
| rc = ata_acpi_exec_tfs(dev, &nr_executed); |
| if (rc) |
| goto acpi_err; |
| |
| dev->flags &= ~ATA_DFLAG_ACPI_PENDING; |
| |
| /* refresh IDENTIFY page if any _GTF command has been executed */ |
| if (nr_executed) { |
| rc = ata_dev_reread_id(dev, 0); |
| if (rc < 0) { |
| ata_dev_err(dev, |
| "failed to IDENTIFY after ACPI commands\n"); |
| return rc; |
| } |
| } |
| |
| return 0; |
| |
| acpi_err: |
| /* ignore evaluation failure if we can continue safely */ |
| if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) |
| return 0; |
| |
| /* fail and let EH retry once more for unknown IO errors */ |
| if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { |
| dev->flags |= ATA_DFLAG_ACPI_FAILED; |
| return rc; |
| } |
| |
| dev->flags |= ATA_DFLAG_ACPI_DISABLED; |
| ata_dev_warn(dev, "ACPI: failed the second time, disabled\n"); |
| |
| /* We can safely continue if no _GTF command has been executed |
| * and port is not frozen. |
| */ |
| if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) |
| return 0; |
| |
| return rc; |
| } |
| |
| /** |
| * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled |
| * @dev: target ATA device |
| * |
| * This function is called when @dev is about to be disabled. |
| * |
| * LOCKING: |
| * EH context. |
| */ |
| void ata_acpi_on_disable(struct ata_device *dev) |
| { |
| ata_acpi_clear_gtf(dev); |
| } |
| |
| static int compat_pci_ata(struct ata_port *ap) |
| { |
| struct device *dev = ap->tdev.parent; |
| struct pci_dev *pdev; |
| |
| if (!is_pci_dev(dev)) |
| return 0; |
| |
| pdev = to_pci_dev(dev); |
| |
| if ((pdev->class >> 8) != PCI_CLASS_STORAGE_SATA && |
| (pdev->class >> 8) != PCI_CLASS_STORAGE_IDE) |
| return 0; |
| |
| return 1; |
| } |
| |
| static int ata_acpi_bind_host(struct ata_port *ap, acpi_handle *handle) |
| { |
| if (ap->flags & ATA_FLAG_ACPI_SATA) |
| return -ENODEV; |
| |
| *handle = acpi_get_child(DEVICE_ACPI_HANDLE(ap->tdev.parent), |
| ap->port_no); |
| |
| if (!*handle) |
| return -ENODEV; |
| |
| if (__ata_acpi_gtm(ap, *handle, &ap->__acpi_init_gtm) == 0) |
| ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; |
| |
| return 0; |
| } |
| |
| static int ata_acpi_bind_device(struct ata_port *ap, struct scsi_device *sdev, |
| acpi_handle *handle) |
| { |
| struct ata_device *ata_dev; |
| |
| if (ap->flags & ATA_FLAG_ACPI_SATA) { |
| if (!sata_pmp_attached(ap)) |
| ata_dev = &ap->link.device[sdev->id]; |
| else |
| ata_dev = &ap->pmp_link[sdev->channel].device[sdev->id]; |
| } |
| else { |
| ata_dev = &ap->link.device[sdev->id]; |
| } |
| |
| *handle = ata_dev_acpi_handle(ata_dev); |
| |
| if (!*handle) |
| return -ENODEV; |
| |
| return 0; |
| } |
| |
| static int is_ata_port(const struct device *dev) |
| { |
| return dev->type == &ata_port_type; |
| } |
| |
| static struct ata_port *dev_to_ata_port(struct device *dev) |
| { |
| while (!is_ata_port(dev)) { |
| if (!dev->parent) |
| return NULL; |
| dev = dev->parent; |
| } |
| return to_ata_port(dev); |
| } |
| |
| static int ata_acpi_find_device(struct device *dev, acpi_handle *handle) |
| { |
| struct ata_port *ap = dev_to_ata_port(dev); |
| |
| if (!ap) |
| return -ENODEV; |
| |
| if (!compat_pci_ata(ap)) |
| return -ENODEV; |
| |
| if (scsi_is_host_device(dev)) |
| return ata_acpi_bind_host(ap, handle); |
| else if (scsi_is_sdev_device(dev)) { |
| struct scsi_device *sdev = to_scsi_device(dev); |
| |
| return ata_acpi_bind_device(ap, sdev, handle); |
| } else |
| return -ENODEV; |
| } |
| |
| static struct acpi_bus_type ata_acpi_bus = { |
| .name = "ATA", |
| .find_device = ata_acpi_find_device, |
| }; |
| |
| int ata_acpi_register(void) |
| { |
| return scsi_register_acpi_bus_type(&ata_acpi_bus); |
| } |
| |
| void ata_acpi_unregister(void) |
| { |
| scsi_unregister_acpi_bus_type(&ata_acpi_bus); |
| } |