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platform/x86/intel/vsec: Add intel_vsec_register

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Add and export intel_vsec_register() to allow the registration of Intel
extended capabilities from other drivers. Add check to look for memory
conflicts before registering a new capability. Since the vsec provider
may not be a PCI device, add a parent field to
intel_vsec_platform_info() to allow specifying the parent device for
device managed cleanup.

Signed-off-by: Gayatri Kammela <gayatri.kammela@linux.intel.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20231129222132.2331261-8-david.e.box@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Gayatri Kammela 2023-11-29 14:21:19 -08:00 committed by Hans de Goede
parent 6dfc2514ac
commit 4edbd117ba
2 changed files with 27 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
drivers/platform/x86/intel/vsec.c
View file

@ -152,9 +152,15 @@ static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *he
struct intel_vsec_device __free(kfree) *intel_vsec_dev = NULL;
struct resource __free(kfree) *res = NULL;
struct resource *tmp;
struct device *parent;
unsigned long quirks = info->quirks;
int i;
if (info->parent)
parent = info->parent;
else
parent = &pdev->dev;
if (!intel_vsec_supported(header->id, info->caps))
return -EINVAL;
@ -189,6 +195,12 @@ static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *he
header->offset + i * (header->entry_size * sizeof(u32));
tmp->end = tmp->start + (header->entry_size * sizeof(u32)) - 1;
tmp->flags = IORESOURCE_MEM;
/* Check resource is not in use */
if (!request_mem_region(tmp->start, resource_size(tmp), ""))
return -EBUSY;
release_mem_region(tmp->start, resource_size(tmp));
}
intel_vsec_dev->pcidev = pdev;
@ -205,7 +217,7 @@ static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *he
* Pass the ownership of intel_vsec_dev and resource within it to
* intel_vsec_add_aux()
*/
return intel_vsec_add_aux(pdev, &pdev->dev, no_free_ptr(intel_vsec_dev),
return intel_vsec_add_aux(pdev, parent, no_free_ptr(intel_vsec_dev),
intel_vsec_name(header->id));
}
@ -323,6 +335,16 @@ static bool intel_vsec_walk_vsec(struct pci_dev *pdev,
return have_devices;
}
void intel_vsec_register(struct pci_dev *pdev,
struct intel_vsec_platform_info *info)
{
if (!pdev || !info)
return;
intel_vsec_walk_header(pdev, info);
}
EXPORT_SYMBOL_NS_GPL(intel_vsec_register, INTEL_VSEC);
static int intel_vsec_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct intel_vsec_platform_info *info;

4
drivers/platform/x86/intel/vsec.h
View file

@ -69,6 +69,7 @@ enum intel_vsec_quirks {
/* Platform specific data */
struct intel_vsec_platform_info {
struct device *parent;
struct intel_vsec_header **headers;
unsigned long caps;
unsigned long quirks;
@ -99,4 +100,7 @@ static inline struct intel_vsec_device *auxdev_to_ivdev(struct auxiliary_device
{
return container_of(auxdev, struct intel_vsec_device, auxdev);
}
void intel_vsec_register(struct pci_dev *pdev,
struct intel_vsec_platform_info *info);
#endif