1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 #ifndef __PSP_SEV_TIO_H__ 3 #define __PSP_SEV_TIO_H__ 4 5 #include <linux/pci-tsm.h> 6 #include <linux/pci-ide.h> 7 #include <linux/tsm.h> 8 #include <uapi/linux/psp-sev.h> 9 10 struct sla_addr_t { 11 union { 12 u64 sla; 13 struct { 14 u64 page_type :1, 15 page_size :1, 16 reserved1 :10, 17 pfn :40, 18 reserved2 :12; 19 }; 20 }; 21 } __packed; 22 23 #define SEV_TIO_MAX_COMMAND_LENGTH 128 24 25 /* SPDM control structure for DOE */ 26 struct tsm_spdm { 27 unsigned long req_len; 28 void *req; 29 unsigned long rsp_len; 30 void *rsp; 31 }; 32 33 /* Describes TIO device */ 34 struct tsm_dsm_tio { 35 u8 cert_slot; 36 struct sla_addr_t dev_ctx; 37 struct sla_addr_t req; 38 struct sla_addr_t resp; 39 struct sla_addr_t scratch; 40 struct sla_addr_t output; 41 size_t output_len; 42 size_t scratch_len; 43 struct tsm_spdm spdm; 44 struct sla_buffer_hdr *reqbuf; /* vmap'ed @req for DOE */ 45 struct sla_buffer_hdr *respbuf; /* vmap'ed @resp for DOE */ 46 47 int cmd; 48 int psp_ret; 49 u8 cmd_data[SEV_TIO_MAX_COMMAND_LENGTH]; 50 void *data_pg; /* Data page for DEV_STATUS/TDI_STATUS/TDI_INFO/ASID_FENCE */ 51 52 #define TIO_IDE_MAX_TC 8 53 struct pci_ide *ide[TIO_IDE_MAX_TC]; 54 }; 55 56 /* Describes TSM structure for PF0 pointed by pci_dev->tsm */ 57 struct tio_dsm { 58 struct pci_tsm_pf0 tsm; 59 struct tsm_dsm_tio data; 60 struct sev_device *sev; 61 }; 62 63 /* Data object IDs */ 64 #define SPDM_DOBJ_ID_NONE 0 65 #define SPDM_DOBJ_ID_REQ 1 66 #define SPDM_DOBJ_ID_RESP 2 67 68 struct spdm_dobj_hdr { 69 u32 id; /* Data object type identifier */ 70 u32 length; /* Length of the data object, INCLUDING THIS HEADER */ 71 struct { /* Version of the data object structure */ 72 u8 minor; 73 u8 major; 74 } version; 75 } __packed; 76 77 /** 78 * struct sev_tio_status - TIO_STATUS command's info_paddr buffer 79 * 80 * @length: Length of this structure in bytes 81 * @tio_en: Indicates that SNP_INIT_EX initialized the RMP for SEV-TIO 82 * @tio_init_done: Indicates TIO_INIT has been invoked 83 * @spdm_req_size_min: Minimum SPDM request buffer size in bytes 84 * @spdm_req_size_max: Maximum SPDM request buffer size in bytes 85 * @spdm_scratch_size_min: Minimum SPDM scratch buffer size in bytes 86 * @spdm_scratch_size_max: Maximum SPDM scratch buffer size in bytes 87 * @spdm_out_size_min: Minimum SPDM output buffer size in bytes 88 * @spdm_out_size_max: Maximum for the SPDM output buffer size in bytes 89 * @spdm_rsp_size_min: Minimum SPDM response buffer size in bytes 90 * @spdm_rsp_size_max: Maximum SPDM response buffer size in bytes 91 * @devctx_size: Size of a device context buffer in bytes 92 * @tdictx_size: Size of a TDI context buffer in bytes 93 * @tio_crypto_alg: TIO crypto algorithms supported 94 */ 95 struct sev_tio_status { 96 u32 length; 97 u32 tio_en :1, 98 tio_init_done :1, 99 reserved :30; 100 u32 spdm_req_size_min; 101 u32 spdm_req_size_max; 102 u32 spdm_scratch_size_min; 103 u32 spdm_scratch_size_max; 104 u32 spdm_out_size_min; 105 u32 spdm_out_size_max; 106 u32 spdm_rsp_size_min; 107 u32 spdm_rsp_size_max; 108 u32 devctx_size; 109 u32 tdictx_size; 110 u32 tio_crypto_alg; 111 u8 reserved2[12]; 112 } __packed; 113 114 int sev_tio_init_locked(void *tio_status_page); 115 int sev_tio_continue(struct tsm_dsm_tio *dev_data); 116 117 int sev_tio_dev_create(struct tsm_dsm_tio *dev_data, u16 device_id, u16 root_port_id, 118 u8 segment_id); 119 int sev_tio_dev_connect(struct tsm_dsm_tio *dev_data, u8 tc_mask, u8 ids[8], u8 cert_slot); 120 int sev_tio_dev_disconnect(struct tsm_dsm_tio *dev_data, bool force); 121 int sev_tio_dev_reclaim(struct tsm_dsm_tio *dev_data); 122 123 #endif /* __PSP_SEV_TIO_H__ */ 124