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platform/x86/intel/vsec: Add PMT read callbacks

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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>
This commit is contained in:
David E. Box 2024-07-25 08:23:41 -04:00 • committed by Hans de Goede
parent fc9aef4382
commit e92affc74c
2 changed files with 16 additions and 0 deletions
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1
drivers/platform/x86/intel/vsec.c
View file

@ -212,6 +212,7 @@ static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *he
intel_vsec_dev->num_resources = header->num_entries; intel_vsec_dev->num_resources = header->num_entries;
intel_vsec_dev->quirks = info->quirks; intel_vsec_dev->quirks = info->quirks;
intel_vsec_dev->base_addr = info->base_addr; intel_vsec_dev->base_addr = info->base_addr;
intel_vsec_dev->priv_data = info->priv_data;
if (header->id == VSEC_ID_SDSI) if (header->id == VSEC_ID_SDSI)
intel_vsec_dev->ida = &intel_vsec_sdsi_ida; intel_vsec_dev->ida = &intel_vsec_sdsi_ida;

15
include/linux/intel_vsec.h
View file

@ -67,10 +67,24 @@ enum intel_vsec_quirks {
VSEC_QUIRK_EARLY_HW = BIT(4), VSEC_QUIRK_EARLY_HW = BIT(4),
}; };
/**
* struct pmt_callbacks - Callback infrastructure for PMT devices
* ->read_telem() when specified, called by client driver to access PMT data (instead
* of direct copy).
* @pdev: PCI device reference for the callback's use
* @guid: ID of data to acccss
* @data: buffer for the data to be copied
* @count: size of buffer
*/
struct pmt_callbacks {
int (*read_telem)(struct pci_dev *pdev, u32 guid, u64 *data, u32 count);
};
/** /**
* struct intel_vsec_platform_info - Platform specific data * struct intel_vsec_platform_info - Platform specific data
* @parent: parent device in the auxbus chain * @parent: parent device in the auxbus chain
* @headers: list of headers to define the PMT client devices to create * @headers: list of headers to define the PMT client devices to create
* @priv_data: private data, usable by parent devices, currently a callback
* @caps: bitmask of PMT capabilities for the given headers * @caps: bitmask of PMT capabilities for the given headers
* @quirks: bitmask of VSEC device quirks * @quirks: bitmask of VSEC device quirks
* @base_addr: allow a base address to be specified (rather than derived) * @base_addr: allow a base address to be specified (rather than derived)
@ -78,6 +92,7 @@ enum intel_vsec_quirks {
struct intel_vsec_platform_info { struct intel_vsec_platform_info {
struct device *parent; struct device *parent;
struct intel_vsec_header **headers; struct intel_vsec_header **headers;
void *priv_data;
unsigned long caps; unsigned long caps;
unsigned long quirks; unsigned long quirks;
u64 base_addr; u64 base_addr;