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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-12 11:50:33 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-12 11:50:33 -0800
commitbe23c9d20b341a58ad7107f9e9aa5735cea3da13 (patch)
treeda5e5ede73ccba5e3464821fb0cfb67c027f796a /include
parent5d50ac70fe98518dbf620bfba8184254663125eb (diff)
parentf57ab32a843690fe7431ebb3a2f461e689a2e3c7 (diff)
Merge tag 'pm+acpi-4.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management and ACPI updates from Rafael Wysocki: "The only new feature in this batch is support for the ACPI _CCA device configuration object, which it a pre-requisite for future ACPI PCI support on ARM64, but should not affect the other architectures. The rest is fixes and cleanups, mostly in cpufreq (including intel_pstate), the Operating Performace Points (OPP) framework and tools (cpupower and turbostat). Specifics: - Support for the ACPI _CCA configuration object intended to tell the OS whether or not a bus master device supports hardware managed cache coherency and a new set of functions to allow drivers to check the cache coherency support for devices in a platform firmware interface agnostic way (Suravee Suthikulpanit, Jeremy Linton). - ACPI backlight quirks for ESPRIMO Mobile M9410 and Dell XPS L421X (Aaron Lu, Hans de Goede). - Fixes for the arm_big_little and s5pv210-cpufreq cpufreq drivers (Jon Medhurst, Nicolas Pitre). - kfree()-related fixup for the recently introduced CPPC cpufreq frontend (Markus Elfring). - intel_pstate fix reducing kernel log noise on systems where P-states are managed by hardware (Prarit Bhargava). - intel_pstate maintainers information update (Srinivas Pandruvada). - cpufreq core optimization related to the handling of delayed work items used by governors (Viresh Kumar). - Locking fixes and cleanups of the Operating Performance Points (OPP) framework (Viresh Kumar). - Generic power domains framework cleanups (Lina Iyer). - cpupower tool updates (Jacob Tanenbaum, Sriram Raghunathan, Thomas Renninger). - turbostat tool updates (Len Brown)" * tag 'pm+acpi-4.4-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits) PCI: ACPI: Add support for PCI device DMA coherency PCI: OF: Move of_pci_dma_configure() to pci_dma_configure() of/pci: Fix pci_get_host_bridge_device leak device property: ACPI: Remove unused DMA APIs device property: ACPI: Make use of the new DMA Attribute APIs device property: Adding DMA Attribute APIs for Generic Devices ACPI: Adding DMA Attribute APIs for ACPI Device device property: Introducing enum dev_dma_attr ACPI: Honor ACPI _CCA attribute setting cpufreq: CPPC: Delete an unnecessary check before the function call kfree() PM / OPP: Add opp_rcu_lockdep_assert() to _find_device_opp() PM / OPP: Hold dev_opp_list_lock for writers PM / OPP: Protect updates to list_dev with mutex PM / OPP: Propagate error properly from dev_pm_opp_set_sharing_cpus() cpufreq: s5pv210-cpufreq: fix wrong do_div() usage MAINTAINERS: update for intel P-state driver Creating a common structure initialization pattern for struct option cpupower: Enable disabled Cstates if they are below max latency cpupower: Remove debug message when using cpupower idle-set -D switch cpupower: cpupower monitor reports uninitialized values for offline cpus ...
Diffstat (limited to 'include')
-rw-r--r--include/acpi/acpi_bus.h36
-rw-r--r--include/linux/acpi.h7
-rw-r--r--include/linux/of_pci.h3
-rw-r--r--include/linux/property.h10
4 files changed, 18 insertions, 38 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index d11eff8a4efe..ad0a5ff3d4cd 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -390,39 +390,6 @@ struct acpi_data_node {
struct completion kobj_done;
};
-static inline bool acpi_check_dma(struct acpi_device *adev, bool *coherent)
-{
- bool ret = false;
-
- if (!adev)
- return ret;
-
- /**
- * Currently, we only support _CCA=1 (i.e. coherent_dma=1)
- * This should be equivalent to specifyig dma-coherent for
- * a device in OF.
- *
- * For the case when _CCA=0 (i.e. coherent_dma=0 && cca_seen=1),
- * There are two cases:
- * case 1. Do not support and disable DMA.
- * case 2. Support but rely on arch-specific cache maintenance for
- * non-coherence DMA operations.
- * Currently, we implement case 1 above.
- *
- * For the case when _CCA is missing (i.e. cca_seen=0) and
- * platform specifies ACPI_CCA_REQUIRED, we do not support DMA,
- * and fallback to arch-specific default handling.
- *
- * See acpi_init_coherency() for more info.
- */
- if (adev->flags.coherent_dma) {
- ret = true;
- if (coherent)
- *coherent = adev->flags.coherent_dma;
- }
- return ret;
-}
-
static inline bool is_acpi_node(struct fwnode_handle *fwnode)
{
return fwnode && (fwnode->type == FWNODE_ACPI
@@ -595,6 +562,9 @@ struct acpi_pci_root {
/* helper */
+bool acpi_dma_supported(struct acpi_device *adev);
+enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
+
struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
u64 address, bool check_children);
int acpi_is_root_bridge(acpi_handle);
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index ebfac2fe0c81..054833939995 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -601,11 +601,16 @@ static inline int acpi_device_modalias(struct device *dev,
return -ENODEV;
}
-static inline bool acpi_check_dma(struct acpi_device *adev, bool *coherent)
+static inline bool acpi_dma_supported(struct acpi_device *adev)
{
return false;
}
+static inline enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev)
+{
+ return DEV_DMA_NOT_SUPPORTED;
+}
+
#define ACPI_PTR(_ptr) (NULL)
#endif /* !CONFIG_ACPI */
diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h
index 38c0533a3359..2c51ee78b1c0 100644
--- a/include/linux/of_pci.h
+++ b/include/linux/of_pci.h
@@ -16,7 +16,6 @@ int of_pci_get_devfn(struct device_node *np);
int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin);
int of_pci_parse_bus_range(struct device_node *node, struct resource *res);
int of_get_pci_domain_nr(struct device_node *node);
-void of_pci_dma_configure(struct pci_dev *pci_dev);
void of_pci_check_probe_only(void);
#else
static inline int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq)
@@ -53,8 +52,6 @@ of_get_pci_domain_nr(struct device_node *node)
return -1;
}
-static inline void of_pci_dma_configure(struct pci_dev *pci_dev) { }
-
static inline void of_pci_check_probe_only(void) { }
#endif
diff --git a/include/linux/property.h b/include/linux/property.h
index 463de52fe891..0a3705a7c9f2 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -27,6 +27,12 @@ enum dev_prop_type {
DEV_PROP_MAX,
};
+enum dev_dma_attr {
+ DEV_DMA_NOT_SUPPORTED,
+ DEV_DMA_NON_COHERENT,
+ DEV_DMA_COHERENT,
+};
+
bool device_property_present(struct device *dev, const char *propname);
int device_property_read_u8_array(struct device *dev, const char *propname,
u8 *val, size_t nval);
@@ -168,7 +174,9 @@ struct property_set {
void device_add_property_set(struct device *dev, struct property_set *pset);
-bool device_dma_is_coherent(struct device *dev);
+bool device_dma_supported(struct device *dev);
+
+enum dev_dma_attr device_get_dma_attr(struct device *dev);
int device_get_phy_mode(struct device *dev);