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e92affc74c
Some PMT providers require device specific actions before their telemetry can be read. Provide assignable PMT read callbacks to allow providers to perform those actions. Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com> Signed-off-by: David E. Box <david.e.box@linux.intel.com> Link: https://lore.kernel.org/r/20240725122346.4063913-3-michael.j.ruhl@intel.com Signed-off-by: Hans de Goede <hdegoede@redhat.com>
150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _INTEL_VSEC_H
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#define _INTEL_VSEC_H
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#include <linux/auxiliary_bus.h>
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#include <linux/bits.h>
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#define VSEC_CAP_TELEMETRY BIT(0)
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#define VSEC_CAP_WATCHER BIT(1)
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#define VSEC_CAP_CRASHLOG BIT(2)
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#define VSEC_CAP_SDSI BIT(3)
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#define VSEC_CAP_TPMI BIT(4)
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/* Intel DVSEC offsets */
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#define INTEL_DVSEC_ENTRIES 0xA
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#define INTEL_DVSEC_SIZE 0xB
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#define INTEL_DVSEC_TABLE 0xC
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#define INTEL_DVSEC_TABLE_BAR(x) ((x) & GENMASK(2, 0))
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#define INTEL_DVSEC_TABLE_OFFSET(x) ((x) & GENMASK(31, 3))
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#define TABLE_OFFSET_SHIFT 3
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struct pci_dev;
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struct resource;
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enum intel_vsec_id {
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VSEC_ID_TELEMETRY = 2,
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VSEC_ID_WATCHER = 3,
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VSEC_ID_CRASHLOG = 4,
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VSEC_ID_SDSI = 65,
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VSEC_ID_TPMI = 66,
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};
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/**
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* struct intel_vsec_header - Common fields of Intel VSEC and DVSEC registers.
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* @rev: Revision ID of the VSEC/DVSEC register space
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* @length: Length of the VSEC/DVSEC register space
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* @id: ID of the feature
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* @num_entries: Number of instances of the feature
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* @entry_size: Size of the discovery table for each feature
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* @tbir: BAR containing the discovery tables
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* @offset: BAR offset of start of the first discovery table
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*/
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struct intel_vsec_header {
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u8 rev;
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u16 length;
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u16 id;
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u8 num_entries;
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u8 entry_size;
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u8 tbir;
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u32 offset;
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};
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enum intel_vsec_quirks {
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/* Watcher feature not supported */
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VSEC_QUIRK_NO_WATCHER = BIT(0),
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/* Crashlog feature not supported */
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VSEC_QUIRK_NO_CRASHLOG = BIT(1),
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/* Use shift instead of mask to read discovery table offset */
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VSEC_QUIRK_TABLE_SHIFT = BIT(2),
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/* DVSEC not present (provided in driver data) */
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VSEC_QUIRK_NO_DVSEC = BIT(3),
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/* Platforms requiring quirk in the auxiliary driver */
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VSEC_QUIRK_EARLY_HW = BIT(4),
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};
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/**
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* struct pmt_callbacks - Callback infrastructure for PMT devices
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* ->read_telem() when specified, called by client driver to access PMT data (instead
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* of direct copy).
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* @pdev: PCI device reference for the callback's use
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* @guid: ID of data to acccss
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* @data: buffer for the data to be copied
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* @count: size of buffer
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*/
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struct pmt_callbacks {
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int (*read_telem)(struct pci_dev *pdev, u32 guid, u64 *data, u32 count);
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};
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/**
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* struct intel_vsec_platform_info - Platform specific data
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* @parent: parent device in the auxbus chain
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* @headers: list of headers to define the PMT client devices to create
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* @priv_data: private data, usable by parent devices, currently a callback
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* @caps: bitmask of PMT capabilities for the given headers
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* @quirks: bitmask of VSEC device quirks
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* @base_addr: allow a base address to be specified (rather than derived)
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*/
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struct intel_vsec_platform_info {
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struct device *parent;
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struct intel_vsec_header **headers;
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void *priv_data;
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unsigned long caps;
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unsigned long quirks;
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u64 base_addr;
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};
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/**
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* struct intel_sec_device - Auxbus specific device information
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* @auxdev: auxbus device struct for auxbus access
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* @pcidev: pci device associated with the device
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* @resource: any resources shared by the parent
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* @ida: id reference
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* @num_resources: number of resources
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* @id: xarray id
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* @priv_data: any private data needed
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* @quirks: specified quirks
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* @base_addr: base address of entries (if specified)
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*/
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struct intel_vsec_device {
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struct auxiliary_device auxdev;
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struct pci_dev *pcidev;
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struct resource *resource;
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struct ida *ida;
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int num_resources;
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int id; /* xa */
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void *priv_data;
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size_t priv_data_size;
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unsigned long quirks;
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u64 base_addr;
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};
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int intel_vsec_add_aux(struct pci_dev *pdev, struct device *parent,
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struct intel_vsec_device *intel_vsec_dev,
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const char *name);
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static inline struct intel_vsec_device *dev_to_ivdev(struct device *dev)
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{
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return container_of(dev, struct intel_vsec_device, auxdev.dev);
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}
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static inline struct intel_vsec_device *auxdev_to_ivdev(struct auxiliary_device *auxdev)
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{
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return container_of(auxdev, struct intel_vsec_device, auxdev);
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}
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#if IS_ENABLED(CONFIG_INTEL_VSEC)
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void intel_vsec_register(struct pci_dev *pdev,
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struct intel_vsec_platform_info *info);
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#else
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static inline void intel_vsec_register(struct pci_dev *pdev,
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struct intel_vsec_platform_info *info)
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{
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}
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#endif
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#endif
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