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Merge branches 'acpi-ec', 'acpi-dma', 'acpi-processor' and 'acpi-cppc' 

* acpi-ec:
  ACPI / EC: Clean up EC GPE mask flag
  ACPI: EC: Fix possible issues related to EC initialization order

* acpi-dma:
  ACPI/IORT: Add IORT named component memory address limits
  ACPI: Make acpi_dma_configure() DMA regions aware
  ACPI: Introduce DMA ranges parsing
  ACPI: Make acpi_dev_get_resources() method agnostic

* acpi-processor:
  ACPI / processor: make function acpi_processor_check_duplicates() static
  ACPI: processor: use dev_dbg() instead of dev_warn() when CPPC probe failed

* acpi-cppc:
  mailbox: pcc: Drop uninformative output during boot
This commit is contained in:
Rafael J. Wysocki 2017-09-03 23:53:39 +02:00
parent 4467ade90d 56f77eeb6b 10d8ab2c15 0ed780e316 66ed4cac66
commit f928a49027
10 changed files with 247 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/acpi/acpi_processor.c
View File

@ -670,7 +670,7 @@ err:
}
void __init acpi_processor_check_duplicates(void)
static void __init acpi_processor_check_duplicates(void)
{
/* check the correctness for all processors in ACPI namespace */
acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,

57
drivers/acpi/arm64/iort.c
View File

@ -680,13 +680,36 @@ static const struct iommu_ops *iort_iommu_xlate(struct device *dev,
return ret ? NULL : ops;
}
static int nc_dma_get_range(struct device *dev, u64 *size)
{
struct acpi_iort_node *node;
struct acpi_iort_named_component *ncomp;
node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT,
iort_match_node_callback, dev);
if (!node)
return -ENODEV;
ncomp = (struct acpi_iort_named_component *)node->node_data;
*size = ncomp->memory_address_limit >= 64 ? U64_MAX :
1ULL<<ncomp->memory_address_limit;
return 0;
}
/**
* iort_set_dma_mask - Set-up dma mask for a device.
* iort_dma_setup() - Set-up device DMA parameters.
*
* @dev: device to configure
* @dma_addr: device DMA address result pointer
* @size: DMA range size result pointer
*/
void iort_set_dma_mask(struct device *dev)
void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
{
u64 mask, dmaaddr = 0, size = 0, offset = 0;
int ret, msb;
/*
* Set default coherent_dma_mask to 32 bit. Drivers are expected to
* setup the correct supported mask.
@ -700,6 +723,36 @@ void iort_set_dma_mask(struct device *dev)
*/
if (!dev->dma_mask)
dev->dma_mask = &dev->coherent_dma_mask;
size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1);
if (dev_is_pci(dev))
ret = acpi_dma_get_range(dev, &dmaaddr, &offset, &size);
else
ret = nc_dma_get_range(dev, &size);
if (!ret) {
msb = fls64(dmaaddr + size - 1);
/*
* Round-up to the power-of-two mask or set
* the mask to the whole 64-bit address space
* in case the DMA region covers the full
* memory window.
*/
mask = msb == 64 ? U64_MAX : (1ULL << msb) - 1;
/*
* Limit coherent and dma mask based on size
* retrieved from firmware.
*/
dev->coherent_dma_mask = mask;
*dev->dma_mask = mask;
}
*dma_addr = dmaaddr;
*dma_size = size;
dev->dma_pfn_offset = PFN_DOWN(offset);
dev_dbg(dev, "dma_pfn_offset(%#08llx)\n", offset);
}
/**

48
drivers/acpi/ec.c
View File

@ -112,8 +112,7 @@ enum {
EC_FLAGS_EVT_HANDLER_INSTALLED, /* _Qxx handlers installed */
EC_FLAGS_STARTED, /* Driver is started */
EC_FLAGS_STOPPED, /* Driver is stopped */
EC_FLAGS_COMMAND_STORM, /* GPE storms occurred to the
* current command processing */
EC_FLAGS_GPE_MASKED, /* GPE masked */
};
#define ACPI_EC_COMMAND_POLL 0x01 /* Available for command byte */
@ -425,19 +424,19 @@ static void acpi_ec_complete_request(struct acpi_ec *ec)
wake_up(&ec->wait);
}
static void acpi_ec_set_storm(struct acpi_ec *ec, u8 flag)
static void acpi_ec_mask_gpe(struct acpi_ec *ec)
{
if (!test_bit(flag, &ec->flags)) {
if (!test_bit(EC_FLAGS_GPE_MASKED, &ec->flags)) {
acpi_ec_disable_gpe(ec, false);
ec_dbg_drv("Polling enabled");
set_bit(flag, &ec->flags);
set_bit(EC_FLAGS_GPE_MASKED, &ec->flags);
}
}
static void acpi_ec_clear_storm(struct acpi_ec *ec, u8 flag)
static void acpi_ec_unmask_gpe(struct acpi_ec *ec)
{
if (test_bit(flag, &ec->flags)) {
clear_bit(flag, &ec->flags);
if (test_bit(EC_FLAGS_GPE_MASKED, &ec->flags)) {
clear_bit(EC_FLAGS_GPE_MASKED, &ec->flags);
acpi_ec_enable_gpe(ec, false);
ec_dbg_drv("Polling disabled");
}
@ -464,7 +463,7 @@ static bool acpi_ec_submit_flushable_request(struct acpi_ec *ec)
static void acpi_ec_submit_query(struct acpi_ec *ec)
{
acpi_ec_set_storm(ec, EC_FLAGS_COMMAND_STORM);
acpi_ec_mask_gpe(ec);
if (!acpi_ec_event_enabled(ec))
return;
if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) {
@ -480,7 +479,7 @@ static void acpi_ec_complete_query(struct acpi_ec *ec)
if (test_and_clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags))
ec_dbg_evt("Command(%s) unblocked",
acpi_ec_cmd_string(ACPI_EC_COMMAND_QUERY));
acpi_ec_clear_storm(ec, EC_FLAGS_COMMAND_STORM);
acpi_ec_unmask_gpe(ec);
}
static inline void __acpi_ec_enable_event(struct acpi_ec *ec)
@ -700,7 +699,7 @@ err:
++t->irq_count;
/* Allow triggering on 0 threshold */
if (t->irq_count == ec_storm_threshold)
acpi_ec_set_storm(ec, EC_FLAGS_COMMAND_STORM);
acpi_ec_mask_gpe(ec);
}
}
out:
@ -798,7 +797,7 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
spin_lock_irqsave(&ec->lock, tmp);
if (t->irq_count == ec_storm_threshold)
acpi_ec_clear_storm(ec, EC_FLAGS_COMMAND_STORM);
acpi_ec_unmask_gpe(ec);
ec_dbg_req("Command(%s) stopped", acpi_ec_cmd_string(t->command));
ec->curr = NULL;
/* Disable GPE for command processing (IBF=0/OBF=1) */
@ -1586,9 +1585,7 @@ static bool acpi_is_boot_ec(struct acpi_ec *ec)
{
if (!boot_ec)
return false;
if (ec->handle == boot_ec->handle &&
ec->gpe == boot_ec->gpe &&
ec->command_addr == boot_ec->command_addr &&
if (ec->command_addr == boot_ec->command_addr &&
ec->data_addr == boot_ec->data_addr)
return true;
return false;
@ -1613,6 +1610,13 @@ static int acpi_ec_add(struct acpi_device *device)
if (acpi_is_boot_ec(ec)) {
boot_ec_is_ecdt = false;
/*
* Trust PNP0C09 namespace location rather than ECDT ID.
*
* But trust ECDT GPE rather than _GPE because of ASUS quirks,
* so do not change boot_ec->gpe to ec->gpe.
*/
boot_ec->handle = ec->handle;
acpi_handle_debug(ec->handle, "duplicated.\n");
acpi_ec_free(ec);
ec = boot_ec;
@ -1747,18 +1751,20 @@ static int __init acpi_ec_ecdt_start(void)
if (!boot_ec)
return -ENODEV;
/*
* The DSDT EC should have already been started in
* acpi_ec_add().
*/
/* In case acpi_ec_ecdt_start() is called after acpi_ec_add() */
if (!boot_ec_is_ecdt)
return -ENODEV;
/*
* 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 (!acpi_ec_ecdt_get_handle(&handle))
if (boot_ec->handle != ACPI_ROOT_OBJECT)
handle = boot_ec->handle;
else if (!acpi_ec_ecdt_get_handle(&handle))
return -ENODEV;
return acpi_config_boot_ec(boot_ec, handle, true, true);
}
@ -2011,8 +2017,8 @@ int __init acpi_ec_init(void)
return result;
/* Drivers must be started after acpi_ec_query_init() */
ecdt_fail = acpi_ec_ecdt_start();
dsdt_fail = acpi_bus_register_driver(&acpi_ec_driver);
ecdt_fail = acpi_ec_ecdt_start();
return ecdt_fail && dsdt_fail ? -ENODEV : 0;
}

2
drivers/acpi/processor_driver.c
View File

@ -237,7 +237,7 @@ static int __acpi_processor_start(struct acpi_device *device)
result = acpi_cppc_processor_probe(pr);
if (result && !IS_ENABLED(CONFIG_ACPI_CPU_FREQ_PSS))
dev_warn(&device->dev, "CPPC data invalid or not present\n");
dev_dbg(&device->dev, "CPPC data invalid or not present\n");
if (!cpuidle_get_driver() || cpuidle_get_driver() == &acpi_idle_driver)
acpi_processor_power_init(pr);

88
drivers/acpi/resource.c
View File

@ -573,6 +573,35 @@ static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
return AE_OK;
}
static int __acpi_dev_get_resources(struct acpi_device *adev,
struct list_head *list,
int (*preproc)(struct acpi_resource *, void *),
void *preproc_data, char *method)
{
struct res_proc_context c;
acpi_status status;
if (!adev || !adev->handle || !list_empty(list))
return -EINVAL;
if (!acpi_has_method(adev->handle, method))
return 0;
c.list = list;
c.preproc = preproc;
c.preproc_data = preproc_data;
c.count = 0;
c.error = 0;
status = acpi_walk_resources(adev->handle, method,
acpi_dev_process_resource, &c);
if (ACPI_FAILURE(status)) {
acpi_dev_free_resource_list(list);
return c.error ? c.error : -EIO;
}
return c.count;
}
/**
* acpi_dev_get_resources - Get current resources of a device.
* @adev: ACPI device node to get the resources for.
@ -601,31 +630,46 @@ int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
int (*preproc)(struct acpi_resource *, void *),
void *preproc_data)
{
struct res_proc_context c;
acpi_status status;
if (!adev || !adev->handle || !list_empty(list))
return -EINVAL;
if (!acpi_has_method(adev->handle, METHOD_NAME__CRS))
return 0;
c.list = list;
c.preproc = preproc;
c.preproc_data = preproc_data;
c.count = 0;
c.error = 0;
status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
acpi_dev_process_resource, &c);
if (ACPI_FAILURE(status)) {
acpi_dev_free_resource_list(list);
return c.error ? c.error : -EIO;
}
return c.count;
return __acpi_dev_get_resources(adev, list, preproc, preproc_data,
METHOD_NAME__CRS);
}
EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
static int is_memory(struct acpi_resource *ares, void *not_used)
{
struct resource_win win;
struct resource *res = &win.res;
memset(&win, 0, sizeof(win));
return !(acpi_dev_resource_memory(ares, res)
|| acpi_dev_resource_address_space(ares, &win)
|| acpi_dev_resource_ext_address_space(ares, &win));
}
/**
* acpi_dev_get_dma_resources - Get current DMA resources of a device.
* @adev: ACPI device node to get the resources for.
* @list: Head of the resultant list of resources (must be empty).
*
* Evaluate the _DMA method for the given device node and process its
* output.
*
* The resultant struct resource objects are put on the list pointed to
* by @list, that must be empty initially, as members of struct
* resource_entry objects. Callers of this routine should use
* %acpi_dev_free_resource_list() to free that list.
*
* The number of resources in the output list is returned on success,
* an error code reflecting the error condition is returned otherwise.
*/
int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list)
{
return __acpi_dev_get_resources(adev, list, is_memory, NULL,
METHOD_NAME__DMA);
}
EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources);
/**
* acpi_dev_filter_resource_type - Filter ACPI resource according to resource
* types

91
drivers/acpi/scan.c
View File

@ -1359,6 +1359,85 @@ enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev)
return DEV_DMA_NON_COHERENT;
}
/**
* acpi_dma_get_range() - Get device DMA parameters.
*
* @dev: device to configure
* @dma_addr: pointer device DMA address result
* @offset: pointer to the DMA offset result
* @size: pointer to DMA range size result
*
* Evaluate DMA regions and return respectively DMA region start, offset
* and size in dma_addr, offset and size on parsing success; it does not
* update the passed in values on failure.
*
* Return 0 on success, < 0 on failure.
*/
int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
u64 *size)
{
struct acpi_device *adev;
LIST_HEAD(list);
struct resource_entry *rentry;
int ret;
struct device *dma_dev = dev;
u64 len, dma_start = U64_MAX, dma_end = 0, dma_offset = 0;
/*
* Walk the device tree chasing an ACPI companion with a _DMA
* object while we go. Stop if we find a device with an ACPI
* companion containing a _DMA method.
*/
do {
adev = ACPI_COMPANION(dma_dev);
if (adev && acpi_has_method(adev->handle, METHOD_NAME__DMA))
break;
dma_dev = dma_dev->parent;
} while (dma_dev);
if (!dma_dev)
return -ENODEV;
if (!acpi_has_method(adev->handle, METHOD_NAME__CRS)) {
acpi_handle_warn(adev->handle, "_DMA is valid only if _CRS is present\n");
return -EINVAL;
}
ret = acpi_dev_get_dma_resources(adev, &list);
if (ret > 0) {
list_for_each_entry(rentry, &list, node) {
if (dma_offset && rentry->offset != dma_offset) {
ret = -EINVAL;
dev_warn(dma_dev, "Can't handle multiple windows with different offsets\n");
goto out;
}
dma_offset = rentry->offset;
/* Take lower and upper limits */
if (rentry->res->start < dma_start)
dma_start = rentry->res->start;
if (rentry->res->end > dma_end)
dma_end = rentry->res->end;
}
if (dma_start >= dma_end) {
ret = -EINVAL;
dev_dbg(dma_dev, "Invalid DMA regions configuration\n");
goto out;
}
*dma_addr = dma_start - dma_offset;
len = dma_end - dma_start;
*size = max(len, len + 1);
*offset = dma_offset;
}
out:
acpi_dev_free_resource_list(&list);
return ret >= 0 ? 0 : ret;
}
/**
* acpi_dma_configure - Set-up DMA configuration for the device.
* @dev: The pointer to the device
@ -1367,20 +1446,16 @@ enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev)
int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr)
{
const struct iommu_ops *iommu;
u64 size;
u64 dma_addr = 0, size = 0;
iort_set_dma_mask(dev);
iort_dma_setup(dev, &dma_addr, &size);
iommu = iort_iommu_configure(dev);
if (IS_ERR(iommu) && PTR_ERR(iommu) == -EPROBE_DEFER)
return -EPROBE_DEFER;
size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1);
/*
* Assume dma valid range starts at 0 and covers the whole
* coherent_dma_mask.
*/
arch_setup_dma_ops(dev, 0, size, iommu, attr == DEV_DMA_COHERENT);
arch_setup_dma_ops(dev, dma_addr, size,
iommu, attr == DEV_DMA_COHERENT);
return 0;
}

4
drivers/mailbox/pcc.c
View File

@ -457,10 +457,8 @@ static int __init acpi_pcc_probe(void)
/* Search for PCCT */
status = acpi_get_table(ACPI_SIG_PCCT, 0, &pcct_tbl);
if (ACPI_FAILURE(status) || !pcct_tbl) {
pr_warn("PCCT header not found.\n");
if (ACPI_FAILURE(status) || !pcct_tbl)
return -ENODEV;
}
count = acpi_table_parse_entries(ACPI_SIG_PCCT,
sizeof(struct acpi_table_pcct),

2
include/acpi/acpi_bus.h
View File

@ -578,6 +578,8 @@ struct acpi_pci_root {
bool acpi_dma_supported(struct acpi_device *adev);
enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
u64 *size);
int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr);
void acpi_dma_deconfigure(struct device *dev);

8
include/linux/acpi.h
View File

@ -427,6 +427,8 @@ void acpi_dev_free_resource_list(struct list_head *list);
int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
int (*preproc)(struct acpi_resource *, void *),
void *preproc_data);
int acpi_dev_get_dma_resources(struct acpi_device *adev,
struct list_head *list);
int acpi_dev_filter_resource_type(struct acpi_resource *ares,
unsigned long types);
@ -774,6 +776,12 @@ static inline enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev)
return DEV_DMA_NOT_SUPPORTED;
}
static inline int acpi_dma_get_range(struct device *dev, u64 *dma_addr,
u64 *offset, u64 *size)
{
return -ENODEV;
}
static inline int acpi_dma_configure(struct device *dev,
enum dev_dma_attr attr)
{

5
include/linux/acpi_iort.h
View File

@ -36,7 +36,7 @@ struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id);
void acpi_configure_pmsi_domain(struct device *dev);
int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id);
/* IOMMU interface */
void iort_set_dma_mask(struct device *dev);
void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *size);
const struct iommu_ops *iort_iommu_configure(struct device *dev);
#else
static inline void acpi_iort_init(void) { }
@ -47,7 +47,8 @@ static inline struct irq_domain *iort_get_device_domain(struct device *dev,
{ return NULL; }
static inline void acpi_configure_pmsi_domain(struct device *dev) { }
/* IOMMU interface */
static inline void iort_set_dma_mask(struct device *dev) { }
static inline void iort_dma_setup(struct device *dev, u64 *dma_addr,
u64 *size) { }
static inline
const struct iommu_ops *iort_iommu_configure(struct device *dev)
{ return NULL; }