xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge tag 'acpi-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Browse Source 
Pull ACPI updates from Rafael Wysocki:

   - Update the ACPICA code in the kernel to the 20200214 upstream
     release including:

       * Fix to re-enable the sleep button after wakeup (Anchal
         Agarwal).

       * Fixes for mistakes in comments and typos (Bob Moore).

       * ASL-ASL+ converter updates (Erik Kaneda).

       * Type casting cleanups (Sven Barth).

   - Clean up the intialization of the EC driver and eliminate some dead
     code from it (Rafael Wysocki).

   - Clean up the quirk tables in the AC and battery drivers (Hans de
     Goede).

   - Fix the global lock handling on x86 to ignore unspecified bit
     positions in the global lock field (Jan Engelhardt).

   - Add a new "tiny" driver for ACPI button devices exposed by VMs to
     guest kernels to send signals directly to init (Josh Triplett).

   - Add a kernel parameter to disable ACPI BGRT on x86 (Alex Hung).

   - Make the ACPI PCI host bridge and fan drivers use scnprintf() to
     avoid potential buffer overflows (Takashi Iwai).

   - Clean up assorted pieces of code:

       * Reorder "asmlinkage" to make g++ happy (Alexey Dobriyan).

       * Drop unneeded variable initialization (Colin Ian King).

       * Add missing __acquires/__releases annotations (Jules Irenge).

       * Replace list_for_each_safe() with list_for_each_entry_safe()
         (chenqiwu)"

* tag 'acpi-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (31 commits)
  ACPICA: Update version to 20200214
  ACPI: PCI: Use scnprintf() for avoiding potential buffer overflow
  ACPI: fan: Use scnprintf() for avoiding potential buffer overflow
  ACPI: EC: Eliminate EC_FLAGS_QUERY_HANDSHAKE
  ACPI: EC: Do not clear boot_ec_is_ecdt in acpi_ec_add()
  ACPI: EC: Simplify acpi_ec_ecdt_start() and acpi_ec_init()
  ACPI: EC: Consolidate event handler installation code
  acpi/x86: ignore unspecified bit positions in the ACPI global lock field
  acpi/x86: add a kernel parameter to disable ACPI BGRT
  x86/acpi: make "asmlinkage" part first thing in the function definition
  ACPI: list_for_each_safe() -> list_for_each_entry_safe()
  ACPI: video: remove redundant assignments to variable result
  ACPI: OSL: Add missing __acquires/__releases annotations
  ACPI / battery: Cleanup Lenovo Ideapad Miix 320 DMI table entry
  ACPI / AC: Cleanup DMI quirk table
  ACPI: EC: Use fast path in acpi_ec_add() for DSDT boot EC
  ACPI: EC: Simplify acpi_ec_add()
  ACPI: EC: Drop AE_NOT_FOUND special case from ec_install_handlers()
  ACPI: EC: Avoid passing redundant argument to functions
  ACPI: EC: Avoid printing confusing messages in acpi_ec_setup()
  ...
This commit is contained in:
Linus Torvalds
2020-03-30 15:17:04 -07:00
parent 49835c15a5 1da28f0323
commit 6d90508121
29 changed files with 300 additions and 262 deletions
Download Patch File Download Diff File Expand all files Collapse all files

314
drivers/acpi/ec.c
View File

@@ -182,7 +182,6 @@ static bool boot_ec_is_ecdt = false;
static struct workqueue_struct *ec_wq;
static struct workqueue_struct *ec_query_wq;
static int EC_FLAGS_QUERY_HANDSHAKE; /* Needs QR_EC issued when SCI_EVT set */
static int EC_FLAGS_CORRECT_ECDT; /* Needs ECDT port address correction */
static int EC_FLAGS_IGNORE_DSDT_GPE; /* Needs ECDT GPE as correction setting */
static int EC_FLAGS_CLEAR_ON_RESUME; /* Needs acpi_ec_clear() on boot/resume */
@@ -690,21 +689,9 @@ static void advance_transaction(struct acpi_ec *ec)
wakeup = true;
}
goto out;
} else {
if (EC_FLAGS_QUERY_HANDSHAKE &&
!(status & ACPI_EC_FLAG_SCI) &&
(t->command == ACPI_EC_COMMAND_QUERY)) {
ec_transaction_transition(ec, ACPI_EC_COMMAND_POLL);
t->rdata[t->ri++] = 0x00;
ec_transaction_transition(ec, ACPI_EC_COMMAND_COMPLETE);
ec_dbg_evt("Command(%s) completed by software",
acpi_ec_cmd_string(ACPI_EC_COMMAND_QUERY));
wakeup = true;
} else if ((status & ACPI_EC_FLAG_IBF) == 0) {
acpi_ec_write_cmd(ec, t->command);
ec_transaction_transition(ec, ACPI_EC_COMMAND_POLL);
} else
goto err;
} else if (!(status & ACPI_EC_FLAG_IBF)) {
acpi_ec_write_cmd(ec, t->command);
ec_transaction_transition(ec, ACPI_EC_COMMAND_POLL);
goto out;
}
err:
@@ -1427,57 +1414,45 @@ ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
return AE_CTRL_TERMINATE;
}
static void install_gpe_event_handler(struct acpi_ec *ec)
static bool install_gpe_event_handler(struct acpi_ec *ec)
{
acpi_status status =
acpi_install_gpe_raw_handler(NULL, ec->gpe,
ACPI_GPE_EDGE_TRIGGERED,
&acpi_ec_gpe_handler,
ec);
if (ACPI_SUCCESS(status)) {
/* This is not fatal as we can poll EC events */
set_bit(EC_FLAGS_EVENT_HANDLER_INSTALLED, &ec->flags);
acpi_ec_leave_noirq(ec);
if (test_bit(EC_FLAGS_STARTED, &ec->flags) &&
ec->reference_count >= 1)
acpi_ec_enable_gpe(ec, true);
}
acpi_status status;
status = acpi_install_gpe_raw_handler(NULL, ec->gpe,
ACPI_GPE_EDGE_TRIGGERED,
&acpi_ec_gpe_handler, ec);
if (ACPI_FAILURE(status))
return false;
if (test_bit(EC_FLAGS_STARTED, &ec->flags) && ec->reference_count >= 1)
acpi_ec_enable_gpe(ec, true);
return true;
}
/* ACPI reduced hardware platforms use a GpioInt specified in _CRS. */
static int install_gpio_irq_event_handler(struct acpi_ec *ec,
struct acpi_device *device)
static bool install_gpio_irq_event_handler(struct acpi_ec *ec)
{
int irq = acpi_dev_gpio_irq_get(device, 0);
int ret;
if (irq < 0)
return irq;
ret = request_irq(irq, acpi_ec_irq_handler, IRQF_SHARED,
"ACPI EC", ec);
/*
* Unlike the GPE case, we treat errors here as fatal, we'll only
* implement GPIO polling if we find a case that needs it.
*/
if (ret < 0)
return ret;
ec->irq = irq;
set_bit(EC_FLAGS_EVENT_HANDLER_INSTALLED, &ec->flags);
acpi_ec_leave_noirq(ec);
return 0;
return request_irq(ec->irq, acpi_ec_irq_handler, IRQF_SHARED,
"ACPI EC", ec) >= 0;
}
/*
* Note: This function returns an error code only when the address space
* handler is not installed, which means "not able to handle
* transactions".
/**
* ec_install_handlers - Install service callbacks and register query methods.
* @ec: Target EC.
* @device: ACPI device object corresponding to @ec.
*
* Install a handler for the EC address space type unless it has been installed
* already. If @device is not NULL, also look for EC query methods in the
* namespace and register them, and install an event (either GPE or GPIO IRQ)
* handler for the EC, if possible.
*
* Return:
* -ENODEV if the address space handler cannot be installed, which means
* "unable to handle transactions",
* -EPROBE_DEFER if GPIO IRQ acquisition needs to be deferred,
* or 0 (success) otherwise.
*/
static int ec_install_handlers(struct acpi_ec *ec, struct acpi_device *device,
bool handle_events)
static int ec_install_handlers(struct acpi_ec *ec, struct acpi_device *device)
{
acpi_status status;
@@ -1490,26 +1465,28 @@ static int ec_install_handlers(struct acpi_ec *ec, struct acpi_device *device,
&acpi_ec_space_handler,
NULL, ec);
if (ACPI_FAILURE(status)) {
if (status == AE_NOT_FOUND) {
/*
* Maybe OS fails in evaluating the _REG
* object. The AE_NOT_FOUND error will be
* ignored and OS * continue to initialize
* EC.
*/
pr_err("Fail in evaluating the _REG object"
" of EC device. Broken bios is suspected.\n");
} else {
acpi_ec_stop(ec, false);
return -ENODEV;
}
acpi_ec_stop(ec, false);
return -ENODEV;
}
set_bit(EC_FLAGS_EC_HANDLER_INSTALLED, &ec->flags);
}
if (!handle_events)
if (!device)
return 0;
if (ec->gpe < 0) {
/* ACPI reduced hardware platforms use a GpioInt from _CRS. */
int irq = acpi_dev_gpio_irq_get(device, 0);
/*
* Bail out right away for deferred probing or complete the
* initialization regardless of any other errors.
*/
if (irq == -EPROBE_DEFER)
return -EPROBE_DEFER;
else if (irq >= 0)
ec->irq = irq;
}
if (!test_bit(EC_FLAGS_QUERY_METHODS_INSTALLED, &ec->flags)) {
/* Find and register all query methods */
acpi_walk_namespace(ACPI_TYPE_METHOD, ec->handle, 1,
@@ -1518,16 +1495,21 @@ static int ec_install_handlers(struct acpi_ec *ec, struct acpi_device *device,
set_bit(EC_FLAGS_QUERY_METHODS_INSTALLED, &ec->flags);
}
if (!test_bit(EC_FLAGS_EVENT_HANDLER_INSTALLED, &ec->flags)) {
if (ec->gpe >= 0) {
install_gpe_event_handler(ec);
} else if (device) {
int ret = install_gpio_irq_event_handler(ec, device);
bool ready = false;
if (ret)
return ret;
} else { /* No GPE and no GpioInt? */
return -ENODEV;
if (ec->gpe >= 0)
ready = install_gpe_event_handler(ec);
else if (ec->irq >= 0)
ready = install_gpio_irq_event_handler(ec);
if (ready) {
set_bit(EC_FLAGS_EVENT_HANDLER_INSTALLED, &ec->flags);
acpi_ec_leave_noirq(ec);
}
/*
* Failures to install an event handler are not fatal, because
* the EC can be polled for events.
*/
}
/* EC is fully operational, allow queries */
acpi_ec_enable_event(ec);
@@ -1574,61 +1556,46 @@ static void ec_remove_handlers(struct acpi_ec *ec)
}
}
static int acpi_ec_setup(struct acpi_ec *ec, struct acpi_device *device,
bool handle_events)
static int acpi_ec_setup(struct acpi_ec *ec, struct acpi_device *device)
{
int ret;
ret = ec_install_handlers(ec, device, handle_events);
ret = ec_install_handlers(ec, device);
if (ret)
return ret;
/* First EC capable of handling transactions */
if (!first_ec) {
if (!first_ec)
first_ec = ec;
acpi_handle_info(first_ec->handle, "Used as first EC\n");
pr_info("EC_CMD/EC_SC=0x%lx, EC_DATA=0x%lx\n", ec->command_addr,
ec->data_addr);
if (test_bit(EC_FLAGS_EVENT_HANDLER_INSTALLED, &ec->flags)) {
if (ec->gpe >= 0)
pr_info("GPE=0x%x\n", ec->gpe);
else
pr_info("IRQ=%d\n", ec->irq);
}
acpi_handle_info(ec->handle,
"GPE=0x%x, IRQ=%d, EC_CMD/EC_SC=0x%lx, EC_DATA=0x%lx\n",
ec->gpe, ec->irq, ec->command_addr, ec->data_addr);
return ret;
}
static bool acpi_ec_ecdt_get_handle(acpi_handle *phandle)
{
struct acpi_table_ecdt *ecdt_ptr;
acpi_status status;
acpi_handle handle;
status = acpi_get_table(ACPI_SIG_ECDT, 1,
(struct acpi_table_header **)&ecdt_ptr);
if (ACPI_FAILURE(status))
return false;
status = acpi_get_handle(NULL, ecdt_ptr->id, &handle);
if (ACPI_FAILURE(status))
return false;
*phandle = handle;
return true;
}
static int acpi_ec_add(struct acpi_device *device)
{
struct acpi_ec *ec = NULL;
bool dep_update = true;
acpi_status status;
struct acpi_ec *ec;
int ret;
strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_EC_CLASS);
if (!strcmp(acpi_device_hid(device), ACPI_ECDT_HID)) {
boot_ec_is_ecdt = true;
if ((boot_ec && boot_ec->handle == device->handle) ||
!strcmp(acpi_device_hid(device), ACPI_ECDT_HID)) {
/* Fast path: this device corresponds to the boot EC. */
ec = boot_ec;
dep_update = false;
} else {
acpi_status status;
ec = acpi_ec_alloc();
if (!ec)
return -ENOMEM;
@@ -1636,12 +1603,11 @@ static int acpi_ec_add(struct acpi_device *device)
status = ec_parse_device(device->handle, 0, ec, NULL);
if (status != AE_CTRL_TERMINATE) {
ret = -EINVAL;
goto err_alloc;
goto err;
}
if (boot_ec && ec->command_addr == boot_ec->command_addr &&
ec->data_addr == boot_ec->data_addr) {
boot_ec_is_ecdt = false;
/*
* Trust PNP0C09 namespace location rather than
* ECDT ID. But trust ECDT GPE rather than _GPE
@@ -1655,15 +1621,18 @@ static int acpi_ec_add(struct acpi_device *device)
}
}
ret = acpi_ec_setup(ec, device, true);
ret = acpi_ec_setup(ec, device);
if (ret)
goto err_query;
goto err;
if (ec == boot_ec)
acpi_handle_info(boot_ec->handle,
"Boot %s EC used to handle transactions and events\n",
"Boot %s EC initialization complete\n",
boot_ec_is_ecdt ? "ECDT" : "DSDT");
acpi_handle_info(ec->handle,
"EC: Used to handle transactions and events\n");
device->driver_data = ec;
ret = !!request_region(ec->data_addr, 1, "EC data");
@@ -1671,19 +1640,16 @@ static int acpi_ec_add(struct acpi_device *device)
ret = !!request_region(ec->command_addr, 1, "EC cmd");
WARN(!ret, "Could not request EC cmd io port 0x%lx", ec->command_addr);
if (dep_update) {
/* Reprobe devices depending on the EC */
acpi_walk_dep_device_list(ec->handle);
}
/* Reprobe devices depending on the EC */
acpi_walk_dep_device_list(ec->handle);
acpi_handle_debug(ec->handle, "enumerated.\n");
return 0;
err_query:
if (ec != boot_ec)
acpi_ec_remove_query_handlers(ec, true, 0);
err_alloc:
err:
if (ec != boot_ec)
acpi_ec_free(ec);
return ret;
}
@@ -1775,7 +1741,7 @@ void __init acpi_ec_dsdt_probe(void)
* At this point, the GPE is not fully initialized, so do not to
* handle the events.
*/
ret = acpi_ec_setup(ec, NULL, false);
ret = acpi_ec_setup(ec, NULL);
if (ret) {
acpi_ec_free(ec);
return;
@@ -1788,53 +1754,44 @@ void __init acpi_ec_dsdt_probe(void)
}
/*
* If the DSDT EC is not functioning, we still need to prepare a fully
* functioning ECDT EC first in order to handle the events.
* https://bugzilla.kernel.org/show_bug.cgi?id=115021
* acpi_ec_ecdt_start - Finalize the boot ECDT EC initialization.
*
* First, look for an ACPI handle for the boot ECDT EC if acpi_ec_add() has not
* found a matching object in the namespace.
*
* Next, in case the DSDT EC is not functioning, it is still necessary to
* provide a functional ECDT EC to handle events, so add an extra device object
* to represent it (see https://bugzilla.kernel.org/show_bug.cgi?id=115021).
*
* This is useful on platforms with valid ECDT and invalid DSDT EC settings,
* like ASUS X550ZE (see https://bugzilla.kernel.org/show_bug.cgi?id=196847).
*/
static int __init acpi_ec_ecdt_start(void)
static void __init acpi_ec_ecdt_start(void)
{
struct acpi_table_ecdt *ecdt_ptr;
acpi_handle handle;
acpi_status status;
if (!boot_ec)
return -ENODEV;
/* In case acpi_ec_ecdt_start() is called after acpi_ec_add() */
if (!boot_ec_is_ecdt)
return -ENODEV;
/* Bail out if a matching EC has been found in the namespace. */
if (!boot_ec || boot_ec->handle != ACPI_ROOT_OBJECT)
return;
/*
* At this point, the namespace and the GPE is initialized, so
* start to find the namespace objects and handle the events.
*
* Note: ec->handle can be valid if this function is called after
* acpi_ec_add(), hence the fast path.
*/
if (boot_ec->handle == ACPI_ROOT_OBJECT) {
if (!acpi_ec_ecdt_get_handle(&handle))
return -ENODEV;
boot_ec->handle = handle;
}
/* Look up the object pointed to from the ECDT in the namespace. */
status = acpi_get_table(ACPI_SIG_ECDT, 1,
(struct acpi_table_header **)&ecdt_ptr);
if (ACPI_FAILURE(status))
return;
/* Register to ACPI bus with PM ops attached */
return acpi_bus_register_early_device(ACPI_BUS_TYPE_ECDT_EC);
status = acpi_get_handle(NULL, ecdt_ptr->id, &handle);
if (ACPI_FAILURE(status))
return;
boot_ec->handle = handle;
/* Add a special ACPI device object to represent the boot EC. */
acpi_bus_register_early_device(ACPI_BUS_TYPE_ECDT_EC);
}
#if 0
/*
* Some EC firmware variations refuses to respond QR_EC when SCI_EVT is not
* set, for which case, we complete the QR_EC without issuing it to the
* firmware.
* https://bugzilla.kernel.org/show_bug.cgi?id=82611
* https://bugzilla.kernel.org/show_bug.cgi?id=97381
*/
static int ec_flag_query_handshake(const struct dmi_system_id *id)
{
pr_debug("Detected the EC firmware requiring QR_EC issued when SCI_EVT set\n");
EC_FLAGS_QUERY_HANDSHAKE = 1;
return 0;
}
#endif
/*
* On some hardware it is necessary to clear events accumulated by the EC during
* sleep. These ECs stop reporting GPEs until they are manually polled, if too
@@ -1962,7 +1919,7 @@ void __init acpi_ec_ecdt_probe(void)
* At this point, the namespace is not initialized, so do not find
* the namespace objects, or handle the events.
*/
ret = acpi_ec_setup(ec, NULL, false);
ret = acpi_ec_setup(ec, NULL);
if (ret) {
acpi_ec_free(ec);
return;
@@ -2165,14 +2122,13 @@ static const struct dmi_system_id acpi_ec_no_wakeup[] = {
{ },
};
int __init acpi_ec_init(void)
void __init acpi_ec_init(void)
{
int result;
int ecdt_fail, dsdt_fail;
result = acpi_ec_init_workqueues();
if (result)
return result;
return;
/*
* Disable EC wakeup on following systems to prevent periodic
@@ -2183,16 +2139,10 @@ int __init acpi_ec_init(void)
pr_debug("Disabling EC wakeup on suspend-to-idle\n");
}
/* Drivers must be started after acpi_ec_query_init() */
dsdt_fail = acpi_bus_register_driver(&acpi_ec_driver);
/*
* Register ECDT to ACPI bus only when PNP0C09 probe fails. This is
* useful for platforms (confirmed on ASUS X550ZE) with valid ECDT
* settings but invalid DSDT settings.
* https://bugzilla.kernel.org/show_bug.cgi?id=196847
*/
ecdt_fail = acpi_ec_ecdt_start();
return ecdt_fail && dsdt_fail ? -ENODEV : 0;
/* Driver must be registered after acpi_ec_init_workqueues(). */
acpi_bus_register_driver(&acpi_ec_driver);
acpi_ec_ecdt_start();
}
/* EC driver currently not unloadable */