diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/pci-ide.h | 78 | ||||
| -rw-r--r-- | include/linux/pci.h | 6 |
2 files changed, 84 insertions, 0 deletions
diff --git a/include/linux/pci-ide.h b/include/linux/pci-ide.h new file mode 100644 index 000000000000..e638f9429bf9 --- /dev/null +++ b/include/linux/pci-ide.h @@ -0,0 +1,78 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Common helpers for drivers (e.g. low-level PCI/TSM drivers) implementing the + * IDE key management protocol (IDE_KM) as defined by: + * PCIe r7.0 section 6.33 Integrity & Data Encryption (IDE) + * + * Copyright(c) 2024-2025 Intel Corporation. All rights reserved. + */ + +#ifndef __PCI_IDE_H__ +#define __PCI_IDE_H__ + +enum pci_ide_partner_select { + PCI_IDE_EP, + PCI_IDE_RP, + PCI_IDE_PARTNER_MAX, + /* + * In addition to the resources in each partner port the + * platform / host-bridge additionally has a Stream ID pool that + * it shares across root ports. Let pci_ide_stream_alloc() use + * the alloc_stream_index() helper as endpoints and root ports. + */ + PCI_IDE_HB = PCI_IDE_PARTNER_MAX, +}; + +/** + * struct pci_ide_partner - Per port pair Selective IDE Stream settings + * @rid_start: Partner Port Requester ID range start + * @rid_end: Partner Port Requester ID range end + * @stream_index: Selective IDE Stream Register Block selection + * @default_stream: Endpoint uses this stream for all upstream TLPs regardless of + * address and RID association registers + * @setup: flag to track whether to run pci_ide_stream_teardown() for this + * partner slot + * @enable: flag whether to run pci_ide_stream_disable() for this partner slot + */ +struct pci_ide_partner { + u16 rid_start; + u16 rid_end; + u8 stream_index; + unsigned int default_stream:1; + unsigned int setup:1; + unsigned int enable:1; +}; + +/** + * struct pci_ide - PCIe Selective IDE Stream descriptor + * @pdev: PCIe Endpoint in the pci_ide_partner pair + * @partner: per-partner settings + * @host_bridge_stream: allocated from host bridge @ide_stream_ida pool + * @stream_id: unique Stream ID (within Partner Port pairing) + * @name: name of the established Selective IDE Stream in sysfs + * + * Negative @stream_id values indicate "uninitialized" on the + * expectation that with TSM established IDE the TSM owns the stream_id + * allocation. + */ +struct pci_ide { + struct pci_dev *pdev; + struct pci_ide_partner partner[PCI_IDE_PARTNER_MAX]; + u8 host_bridge_stream; + int stream_id; + const char *name; +}; + +struct pci_ide_partner *pci_ide_to_settings(struct pci_dev *pdev, + struct pci_ide *ide); +struct pci_ide *pci_ide_stream_alloc(struct pci_dev *pdev); +void pci_ide_stream_free(struct pci_ide *ide); +int pci_ide_stream_register(struct pci_ide *ide); +void pci_ide_stream_unregister(struct pci_ide *ide); +void pci_ide_stream_setup(struct pci_dev *pdev, struct pci_ide *ide); +void pci_ide_stream_teardown(struct pci_dev *pdev, struct pci_ide *ide); +int pci_ide_stream_enable(struct pci_dev *pdev, struct pci_ide *ide); +void pci_ide_stream_disable(struct pci_dev *pdev, struct pci_ide *ide); +void pci_ide_stream_release(struct pci_ide *ide); +DEFINE_FREE(pci_ide_stream_release, struct pci_ide *, if (_T) pci_ide_stream_release(_T)) +#endif /* __PCI_IDE_H__ */ diff --git a/include/linux/pci.h b/include/linux/pci.h index ea94799c81b0..2c8dbae4916c 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -545,6 +545,8 @@ struct pci_dev { u16 ide_cap; /* Link Integrity & Data Encryption */ u8 nr_ide_mem; /* Address association resources for streams */ u8 nr_link_ide; /* Link Stream count (Selective Stream offset) */ + u16 nr_sel_ide; /* Selective Stream count (register block allocator) */ + struct ida ide_stream_ida; unsigned int ide_cfg:1; /* Config cycles over IDE */ unsigned int ide_tee_limit:1; /* Disallow T=0 traffic over IDE */ #endif @@ -614,6 +616,10 @@ struct pci_host_bridge { int domain_nr; struct list_head windows; /* resource_entry */ struct list_head dma_ranges; /* dma ranges resource list */ +#ifdef CONFIG_PCI_IDE + u16 nr_ide_streams; /* Max streams possibly active in @ide_stream_ida */ + struct ida ide_stream_ida; +#endif u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* Platform IRQ swizzler */ int (*map_irq)(const struct pci_dev *, u8, u8); void (*release_fn)(struct pci_host_bridge *); |