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| author | Mario Limonciello <mario.limonciello@amd.com> | 2023-09-07 21:48:43 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2023-09-15 13:29:45 +0300 |
| commit | 6e17375c47a325f79e1f80028344bd4b0bdd985b (patch) | |
| tree | 508186d24ee311b010cf5d626c8b4a7ef0b9a0be | |
| parent | 949a0c8dd3c257730ef7205be759e4bc6cf49cea (diff) | |
| download | linux-6e17375c47a325f79e1f80028344bd4b0bdd985b.tar.xz | |
crypto: ccp - Add support for extended PSP mailbox commands
The PSP mailbox supports a number of extended sub-commands. These
subcommands are placed in the header of the buffer sent to the mailbox.
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/ccp/psp-dev.c | 24 | ||||
| -rw-r--r-- | drivers/crypto/ccp/psp-dev.h | 21 |
2 files changed, 45 insertions, 0 deletions
diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c index 3258c4612e14..f9f3b3404f87 100644 --- a/drivers/crypto/ccp/psp-dev.c +++ b/drivers/crypto/ccp/psp-dev.c @@ -78,6 +78,30 @@ unlock: return ret; } +int psp_extended_mailbox_cmd(struct psp_device *psp, unsigned int timeout_msecs, + struct psp_ext_request *req) +{ + unsigned int reg; + int ret; + + print_hex_dump_debug("->psp ", DUMP_PREFIX_OFFSET, 16, 2, req, + req->header.payload_size, false); + + ret = psp_mailbox_command(psp, PSP_CMD_TEE_EXTENDED_CMD, (void *)req, + timeout_msecs, ®); + if (ret) { + return ret; + } else if (FIELD_GET(PSP_CMDRESP_STS, reg)) { + req->header.status = FIELD_GET(PSP_CMDRESP_STS, reg); + return -EIO; + } + + print_hex_dump_debug("<-psp ", DUMP_PREFIX_OFFSET, 16, 2, req, + req->header.payload_size, false); + + return 0; +} + static struct psp_device *psp_alloc_struct(struct sp_device *sp) { struct device *dev = sp->dev; diff --git a/drivers/crypto/ccp/psp-dev.h b/drivers/crypto/ccp/psp-dev.h index d917657c6085..396a80d846c0 100644 --- a/drivers/crypto/ccp/psp-dev.h +++ b/drivers/crypto/ccp/psp-dev.h @@ -78,15 +78,36 @@ struct psp_device *psp_get_master_device(void); * enum psp_cmd - PSP mailbox commands * @PSP_CMD_TEE_RING_INIT: Initialize TEE ring buffer * @PSP_CMD_TEE_RING_DESTROY: Destroy TEE ring buffer + * @PSP_CMD_TEE_EXTENDED_CMD: Extended command * @PSP_CMD_MAX: Maximum command id */ enum psp_cmd { PSP_CMD_TEE_RING_INIT = 1, PSP_CMD_TEE_RING_DESTROY = 2, + PSP_CMD_TEE_EXTENDED_CMD = 14, PSP_CMD_MAX = 15, }; int psp_mailbox_command(struct psp_device *psp, enum psp_cmd cmd, void *cmdbuff, unsigned int timeout_msecs, unsigned int *cmdresp); +/** + * struct psp_ext_req_buffer_hdr - Structure of the extended command header + * @payload_size: total payload size + * @sub_cmd_id: extended command ID + * @status: status of command execution (out) + */ +struct psp_ext_req_buffer_hdr { + u32 payload_size; + u32 sub_cmd_id; + u32 status; +} __packed; + +struct psp_ext_request { + struct psp_ext_req_buffer_hdr header; + void *buf; +} __packed; + +int psp_extended_mailbox_cmd(struct psp_device *psp, unsigned int timeout_msecs, + struct psp_ext_request *req); #endif /* __PSP_DEV_H */ |