+++ /dev/null
-// 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);
- }
-}
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