diff options
Diffstat (limited to 'drivers/ide/ide-acpi.c')
| -rw-r--r-- | drivers/ide/ide-acpi.c | 622 |
1 files changed, 0 insertions, 622 deletions
diff --git a/drivers/ide/ide-acpi.c b/drivers/ide/ide-acpi.c deleted file mode 100644 index 05e18d658141..000000000000 --- a/drivers/ide/ide-acpi.c +++ /dev/null @@ -1,622 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Provides ACPI support for IDE drives. - * - * Copyright (C) 2005 Intel Corp. - * Copyright (C) 2005 Randy Dunlap - * Copyright (C) 2006 SUSE Linux Products GmbH - * Copyright (C) 2006 Hannes Reinecke - */ - -#include <linux/acpi.h> -#include <linux/ata.h> -#include <linux/delay.h> -#include <linux/device.h> -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/ide.h> -#include <linux/pci.h> -#include <linux/dmi.h> -#include <linux/module.h> - -#define REGS_PER_GTF 7 - -struct GTM_buffer { - u32 PIO_speed0; - u32 DMA_speed0; - u32 PIO_speed1; - u32 DMA_speed1; - u32 GTM_flags; -}; - -struct ide_acpi_drive_link { - acpi_handle obj_handle; - u8 idbuff[512]; -}; - -struct ide_acpi_hwif_link { - ide_hwif_t *hwif; - acpi_handle obj_handle; - struct GTM_buffer gtm; - struct ide_acpi_drive_link master; - struct ide_acpi_drive_link slave; -}; - -#undef DEBUGGING -/* note: adds function name and KERN_DEBUG */ -#ifdef DEBUGGING -#define DEBPRINT(fmt, args...) \ - printk(KERN_DEBUG "%s: " fmt, __func__, ## args) -#else -#define DEBPRINT(fmt, args...) do {} while (0) -#endif /* DEBUGGING */ - -static bool ide_noacpi; -module_param_named(noacpi, ide_noacpi, bool, 0); -MODULE_PARM_DESC(noacpi, "disable IDE ACPI support"); - -static bool ide_acpigtf; -module_param_named(acpigtf, ide_acpigtf, bool, 0); -MODULE_PARM_DESC(acpigtf, "enable IDE ACPI _GTF support"); - -static bool ide_acpionboot; -module_param_named(acpionboot, ide_acpionboot, bool, 0); -MODULE_PARM_DESC(acpionboot, "call IDE ACPI methods on boot"); - -static bool ide_noacpi_psx; -static int no_acpi_psx(const struct dmi_system_id *id) -{ - ide_noacpi_psx = true; - printk(KERN_NOTICE"%s detected - disable ACPI _PSx.\n", id->ident); - return 0; -} - -static const struct dmi_system_id ide_acpi_dmi_table[] = { - /* Bug 9673. */ - /* We should check if this is because ACPI NVS isn't save/restored. */ - { - .callback = no_acpi_psx, - .ident = "HP nx9005", - .matches = { - DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies Ltd."), - DMI_MATCH(DMI_BIOS_VERSION, "KAM1.60") - }, - }, - - { } /* terminate list */ -}; - -int ide_acpi_init(void) -{ - dmi_check_system(ide_acpi_dmi_table); - return 0; -} - -bool ide_port_acpi(ide_hwif_t *hwif) -{ - return ide_noacpi == 0 && hwif->acpidata; -} - -static acpi_handle acpi_get_child(acpi_handle handle, u64 addr) -{ - struct acpi_device *adev; - - if (!handle || acpi_bus_get_device(handle, &adev)) - return NULL; - - adev = acpi_find_child_device(adev, addr, false); - return adev ? adev->handle : NULL; -} - -/** - * ide_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 - * - * Returns the ACPI object handle to the corresponding PCI device. - * - * Returns 0 on success, <0 on error. - */ -static int ide_get_dev_handle(struct device *dev, acpi_handle *handle, - u64 *pcidevfn) -{ - struct pci_dev *pdev = to_pci_dev(dev); - unsigned int bus, devnum, func; - u64 addr; - acpi_handle dev_handle; - acpi_status status; - struct acpi_device_info *dinfo = NULL; - int ret = -ENODEV; - - bus = pdev->bus->number; - devnum = PCI_SLOT(pdev->devfn); - func = PCI_FUNC(pdev->devfn); - /* ACPI _ADR encoding for PCI bus: */ - addr = (u64)(devnum << 16 | func); - - DEBPRINT("ENTER: pci %02x:%02x.%01x\n", bus, devnum, func); - - dev_handle = ACPI_HANDLE(dev); - if (!dev_handle) { - DEBPRINT("no acpi handle for device\n"); - goto err; - } - - status = acpi_get_object_info(dev_handle, &dinfo); - if (ACPI_FAILURE(status)) { - DEBPRINT("get_object_info for device failed\n"); - goto err; - } - if (dinfo && (dinfo->valid & ACPI_VALID_ADR) && - dinfo->address == addr) { - *pcidevfn = addr; - *handle = dev_handle; - } else { - DEBPRINT("get_object_info for device has wrong " - " address: %llu, should be %u\n", - dinfo ? (unsigned long long)dinfo->address : -1ULL, - (unsigned int)addr); - goto err; - } - - DEBPRINT("for dev=0x%x.%x, addr=0x%llx, *handle=0x%p\n", - devnum, func, (unsigned long long)addr, *handle); - ret = 0; -err: - kfree(dinfo); - return ret; -} - -/** - * ide_acpi_hwif_get_handle - Get ACPI object handle for a given hwif - * @hwif: device to locate - * - * Retrieves the object handle for a given hwif. - * - * Returns handle on success, 0 on error. - */ -static acpi_handle ide_acpi_hwif_get_handle(ide_hwif_t *hwif) -{ - struct device *dev = hwif->gendev.parent; - acpi_handle dev_handle; - u64 pcidevfn; - acpi_handle chan_handle; - int err; - - DEBPRINT("ENTER: device %s\n", hwif->name); - - if (!dev) { - DEBPRINT("no PCI device for %s\n", hwif->name); - return NULL; - } - - err = ide_get_dev_handle(dev, &dev_handle, &pcidevfn); - if (err < 0) { - DEBPRINT("ide_get_dev_handle failed (%d)\n", err); - return NULL; - } - - /* get child objects of dev_handle == channel objects, - * + _their_ children == drive objects */ - /* channel is hwif->channel */ - chan_handle = acpi_get_child(dev_handle, hwif->channel); - DEBPRINT("chan adr=%d: handle=0x%p\n", - hwif->channel, chan_handle); - - return chan_handle; -} - -/** - * do_drive_get_GTF - get the drive bootup default taskfile settings - * @drive: the drive for which the taskfile settings should be retrieved - * @gtf_length: number of bytes of _GTF data returned at @gtf_address - * @gtf_address: buffer containing _GTF taskfile arrays - * - * 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(ide_drive_t *drive, - unsigned int *gtf_length, unsigned long *gtf_address, - unsigned long *obj_loc) -{ - acpi_status status; - struct acpi_buffer output; - union acpi_object *out_obj; - int err = -ENODEV; - - *gtf_length = 0; - *gtf_address = 0UL; - *obj_loc = 0UL; - - if (!drive->acpidata->obj_handle) { - DEBPRINT("No ACPI object found for %s\n", drive->name); - 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(drive->acpidata->obj_handle, "_GTF", - NULL, &output); - if (ACPI_FAILURE(status)) { - printk(KERN_DEBUG - "%s: Run _GTF error: status = 0x%x\n", - __func__, status); - goto out; - } - - if (!output.length || !output.pointer) { - DEBPRINT("Run _GTF: " - "length or ptr is NULL (0x%llx, 0x%p)\n", - (unsigned long long)output.length, - output.pointer); - goto out; - } - - out_obj = output.pointer; - if (out_obj->type != ACPI_TYPE_BUFFER) { - DEBPRINT("Run _GTF: error: " - "expected object type of ACPI_TYPE_BUFFER, " - "got 0x%x\n", out_obj->type); - err = -ENOENT; - kfree(output.pointer); - goto out; - } - - if (!out_obj->buffer.length || !out_obj->buffer.pointer || - out_obj->buffer.length % REGS_PER_GTF) { - printk(KERN_ERR - "%s: unexpected GTF length (%d) or addr (0x%p)\n", - __func__, out_obj->buffer.length, - out_obj->buffer.pointer); - err = -ENOENT; - kfree(output.pointer); - goto out; - } - - *gtf_length = out_obj->buffer.length; - *gtf_address = (unsigned long)out_obj->buffer.pointer; - *obj_loc = (unsigned long)out_obj; - DEBPRINT("returning gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n", - *gtf_length, *gtf_address, *obj_loc); - err = 0; -out: - return err; -} - -/** - * do_drive_set_taskfiles - write the drive taskfile settings from _GTF - * @drive: the drive to which the taskfile command should be sent - * @gtf_length: total number of bytes of _GTF taskfiles - * @gtf_address: location of _GTF taskfile arrays - * - * Write {gtf_address, length gtf_length} in groups of - * REGS_PER_GTF bytes. - */ -static int do_drive_set_taskfiles(ide_drive_t *drive, - unsigned int gtf_length, - unsigned long gtf_address) -{ - int rc = 0, err; - int gtf_count = gtf_length / REGS_PER_GTF; - int ix; - - DEBPRINT("total GTF bytes=%u (0x%x), gtf_count=%d, addr=0x%lx\n", - gtf_length, gtf_length, gtf_count, gtf_address); - - /* send all taskfile registers (0x1f1-0x1f7) *in*that*order* */ - for (ix = 0; ix < gtf_count; ix++) { - u8 *gtf = (u8 *)(gtf_address + ix * REGS_PER_GTF); - struct ide_cmd cmd; - - DEBPRINT("(0x1f1-1f7): " - "hex: %02x %02x %02x %02x %02x %02x %02x\n", - gtf[0], gtf[1], gtf[2], - gtf[3], gtf[4], gtf[5], gtf[6]); - - if (!ide_acpigtf) { - DEBPRINT("_GTF execution disabled\n"); - continue; - } - - /* convert GTF to taskfile */ - memset(&cmd, 0, sizeof(cmd)); - memcpy(&cmd.tf.feature, gtf, REGS_PER_GTF); - cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; - cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; - - err = ide_no_data_taskfile(drive, &cmd); - if (err) { - printk(KERN_ERR "%s: ide_no_data_taskfile failed: %u\n", - __func__, err); - rc = err; - } - } - - return rc; -} - -/** - * ide_acpi_exec_tfs - get then write drive taskfile settings - * @drive: the drive for which the taskfile settings should be - * written. - * - * According to the ACPI spec this should be called after _STM - * has been evaluated for the interface. Some ACPI vendors interpret - * that as a hard requirement and modify the taskfile according - * to the Identify Drive information passed down with _STM. - * So one should really make sure to call this only after _STM has - * been executed. - */ -int ide_acpi_exec_tfs(ide_drive_t *drive) -{ - int ret; - unsigned int gtf_length; - unsigned long gtf_address; - unsigned long obj_loc; - - DEBPRINT("call get_GTF, drive=%s port=%d\n", drive->name, drive->dn); - - ret = do_drive_get_GTF(drive, >f_length, >f_address, &obj_loc); - if (ret < 0) { - DEBPRINT("get_GTF error (%d)\n", ret); - return ret; - } - - DEBPRINT("call set_taskfiles, drive=%s\n", drive->name); - - ret = do_drive_set_taskfiles(drive, gtf_length, gtf_address); - kfree((void *)obj_loc); - if (ret < 0) { - DEBPRINT("set_taskfiles error (%d)\n", ret); - } - - DEBPRINT("ret=%d\n", ret); - - return ret; -} - -/** - * ide_acpi_get_timing - get the channel (controller) timings - * @hwif: target IDE interface (channel) - * - * This function executes the _GTM ACPI method for the target channel. - * - */ -void ide_acpi_get_timing(ide_hwif_t *hwif) -{ - acpi_status status; - struct acpi_buffer output; - union acpi_object *out_obj; - - /* Setting up output buffer for _GTM */ - output.length = ACPI_ALLOCATE_BUFFER; - output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ - - /* _GTM has no input parameters */ - status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_GTM", - NULL, &output); - - DEBPRINT("_GTM status: %d, outptr: 0x%p, outlen: 0x%llx\n", - status, output.pointer, - (unsigned long long)output.length); - - if (ACPI_FAILURE(status)) { - DEBPRINT("Run _GTM error: status = 0x%x\n", status); - return; - } - - if (!output.length || !output.pointer) { - DEBPRINT("Run _GTM: length or ptr is NULL (0x%llx, 0x%p)\n", - (unsigned long long)output.length, - output.pointer); - kfree(output.pointer); - return; - } - - out_obj = output.pointer; - if (out_obj->type != ACPI_TYPE_BUFFER) { - DEBPRINT("Run _GTM: error: " - "expected object type of ACPI_TYPE_BUFFER, " - "got 0x%x\n", out_obj->type); - kfree(output.pointer); - return; - } - - if (!out_obj->buffer.length || !out_obj->buffer.pointer || - out_obj->buffer.length != sizeof(struct GTM_buffer)) { - printk(KERN_ERR - "%s: unexpected _GTM length (0x%x)[should be 0x%zx] or " - "addr (0x%p)\n", - __func__, out_obj->buffer.length, - sizeof(struct GTM_buffer), out_obj->buffer.pointer); - kfree(output.pointer); - return; - } - - memcpy(&hwif->acpidata->gtm, out_obj->buffer.pointer, - sizeof(struct GTM_buffer)); - - DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%zx\n", - out_obj->buffer.pointer, out_obj->buffer.length, - sizeof(struct GTM_buffer)); - - DEBPRINT("_GTM fields: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n", - hwif->acpidata->gtm.PIO_speed0, - hwif->acpidata->gtm.DMA_speed0, - hwif->acpidata->gtm.PIO_speed1, - hwif->acpidata->gtm.DMA_speed1, - hwif->acpidata->gtm.GTM_flags); - - kfree(output.pointer); -} - -/** - * ide_acpi_push_timing - set the channel (controller) timings - * @hwif: target IDE interface (channel) - * - * This function executes the _STM ACPI method for the target channel. - * - * _STM requires Identify Drive data, which has to passed as an argument. - * Unfortunately drive->id is a mangled version which we can't readily - * use; hence we'll get the information afresh. - */ -void ide_acpi_push_timing(ide_hwif_t *hwif) -{ - acpi_status status; - struct acpi_object_list input; - union acpi_object in_params[3]; - struct ide_acpi_drive_link *master = &hwif->acpidata->master; - struct ide_acpi_drive_link *slave = &hwif->acpidata->slave; - - /* Give the GTM buffer + drive Identify data to the channel via the - * _STM method: */ - /* setup input parameters buffer for _STM */ - input.count = 3; - input.pointer = in_params; - in_params[0].type = ACPI_TYPE_BUFFER; - in_params[0].buffer.length = sizeof(struct GTM_buffer); - in_params[0].buffer.pointer = (u8 *)&hwif->acpidata->gtm; - in_params[1].type = ACPI_TYPE_BUFFER; - in_params[1].buffer.length = ATA_ID_WORDS * 2; - in_params[1].buffer.pointer = (u8 *)&master->idbuff; - in_params[2].type = ACPI_TYPE_BUFFER; - in_params[2].buffer.length = ATA_ID_WORDS * 2; - in_params[2].buffer.pointer = (u8 *)&slave->idbuff; - /* Output buffer: _STM has no output */ - - status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_STM", - &input, NULL); - - if (ACPI_FAILURE(status)) { - DEBPRINT("Run _STM error: status = 0x%x\n", status); - } - DEBPRINT("_STM status: %d\n", status); -} - -/** - * ide_acpi_set_state - set the channel power state - * @hwif: target IDE interface - * @on: state, on/off - * - * This function executes the _PS0/_PS3 ACPI method to set the power state. - * ACPI spec requires _PS0 when IDE power on and _PS3 when power off - */ -void ide_acpi_set_state(ide_hwif_t *hwif, int on) -{ - ide_drive_t *drive; - int i; - - if (ide_noacpi_psx) - return; - - DEBPRINT("ENTER:\n"); - - /* channel first and then drives for power on and verse versa for power off */ - if (on) - acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0); - - ide_port_for_each_present_dev(i, drive, hwif) { - if (drive->acpidata->obj_handle) - acpi_bus_set_power(drive->acpidata->obj_handle, - on ? ACPI_STATE_D0 : ACPI_STATE_D3_COLD); - } - - if (!on) - acpi_bus_set_power(hwif->acpidata->obj_handle, - ACPI_STATE_D3_COLD); -} - -/** - * ide_acpi_init_port - initialize the ACPI link for an IDE interface - * @hwif: target IDE interface (channel) - * - * The ACPI spec is not quite clear when the drive identify buffer - * should be obtained. Calling IDENTIFY DEVICE during shutdown - * is not the best of ideas as the drive might already being put to - * sleep. And obviously we can't call it during resume. - * So we get the information during startup; but this means that - * any changes during run-time will be lost after resume. - */ -void ide_acpi_init_port(ide_hwif_t *hwif) -{ - hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL); - if (!hwif->acpidata) - return; - - hwif->acpidata->obj_handle = ide_acpi_hwif_get_handle(hwif); - if (!hwif->acpidata->obj_handle) { - DEBPRINT("no ACPI object for %s found\n", hwif->name); - kfree(hwif->acpidata); - hwif->acpidata = NULL; - } -} - -void ide_acpi_port_init_devices(ide_hwif_t *hwif) -{ - ide_drive_t *drive; - int i, err; - - if (hwif->acpidata == NULL) - return; - - /* - * The ACPI spec mandates that we send information - * for both drives, regardless whether they are connected - * or not. - */ - hwif->devices[0]->acpidata = &hwif->acpidata->master; - hwif->devices[1]->acpidata = &hwif->acpidata->slave; - - /* get _ADR info for each device */ - ide_port_for_each_present_dev(i, drive, hwif) { - acpi_handle dev_handle; - - DEBPRINT("ENTER: %s at channel#: %d port#: %d\n", - drive->name, hwif->channel, drive->dn & 1); - - /* TBD: could also check ACPI object VALID bits */ - dev_handle = acpi_get_child(hwif->acpidata->obj_handle, - drive->dn & 1); - - DEBPRINT("drive %s handle 0x%p\n", drive->name, dev_handle); - - drive->acpidata->obj_handle = dev_handle; - } - - /* send IDENTIFY for each device */ - ide_port_for_each_present_dev(i, drive, hwif) { - err = taskfile_lib_get_identify(drive, drive->acpidata->idbuff); - if (err) - DEBPRINT("identify device %s failed (%d)\n", - drive->name, err); - } - - if (ide_noacpi || ide_acpionboot == 0) { - DEBPRINT("ACPI methods disabled on boot\n"); - return; - } - - /* ACPI _PS0 before _STM */ - ide_acpi_set_state(hwif, 1); - /* - * ACPI requires us to call _STM on startup - */ - ide_acpi_get_timing(hwif); - ide_acpi_push_timing(hwif); - - ide_port_for_each_present_dev(i, drive, hwif) { - ide_acpi_exec_tfs(drive); - } -} |