diff options
| author | Srinivas Pandruvada | 2019-06-27 00:38:47 +0200 |
|---|---|---|
| committer | Andy Shevchenko | 2019-07-02 17:41:16 +0200 |
| commit | 31a166fe9c269af17977e650846ee4ea50361c07 (patch) | |
| tree | 8e9fe4a426af054653fd3bdfbcde61706d5864da /include/uapi/linux/isst_if.h | |
| parent | platform/x86: ISST: Add Intel Speed Select mmio interface (diff) | |
| download | kernel-qcow2-linux-31a166fe9c269af17977e650846ee4ea50361c07.tar.gz kernel-qcow2-linux-31a166fe9c269af17977e650846ee4ea50361c07.tar.xz kernel-qcow2-linux-31a166fe9c269af17977e650846ee4ea50361c07.zip | |
platform/x86: ISST: Add Intel Speed Select mailbox interface via PCI
Add an IOCTL to send mailbox commands to PUNIT using PUNIT PCI device.
A limited set of mailbox commands can be sent to PUNIT.
This MMIO interface is used by the intel-speed-select tool under
tools/x86/power to enumerate and control Intel Speed Select features.
The MBOX commands ids and semantics of the message can be checked from
the source code of the tool.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'include/uapi/linux/isst_if.h')
| -rw-r--r-- | include/uapi/linux/isst_if.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/include/uapi/linux/isst_if.h b/include/uapi/linux/isst_if.h index fe2492ade078..e4b1c2ec3279 100644 --- a/include/uapi/linux/isst_if.h +++ b/include/uapi/linux/isst_if.h @@ -95,8 +95,46 @@ struct isst_if_io_regs { struct isst_if_io_reg io_reg[1]; }; +/** + * struct isst_if_mbox_cmd - Structure to define mail box command + * @logical_cpu: Logical CPU number to get target PCI device + * @parameter: Mailbox parameter value + * @req_data: Request data for the mailbox + * @resp_data: Response data for mailbox command response + * @command: Mailbox command value + * @sub_command: Mailbox sub command value + * @reserved: Unused, set to 0 + * + * Structure to specify mailbox command to be sent to PUNIT. + */ +struct isst_if_mbox_cmd { + __u32 logical_cpu; + __u32 parameter; + __u32 req_data; + __u32 resp_data; + __u16 command; + __u16 sub_command; + __u32 reserved; +}; + +/** + * struct isst_if_mbox_cmds - structure for mailbox commands + * @cmd_count: Number of mailbox commands in mbox_cmd[] + * @mbox_cmd[]: Holds one or more mbox commands + * + * This structure used with ioctl ISST_IF_MBOX_COMMAND to send + * one or more mailbox commands to PUNIT. Here IOCTL return value + * indicates number of commands sent or error number if no commands have + * been sent. + */ +struct isst_if_mbox_cmds { + __u32 cmd_count; + struct isst_if_mbox_cmd mbox_cmd[1]; +}; + #define ISST_IF_MAGIC 0xFE #define ISST_IF_GET_PLATFORM_INFO _IOR(ISST_IF_MAGIC, 0, struct isst_if_platform_info *) #define ISST_IF_GET_PHY_ID _IOWR(ISST_IF_MAGIC, 1, struct isst_if_cpu_map *) #define ISST_IF_IO_CMD _IOW(ISST_IF_MAGIC, 2, struct isst_if_io_regs *) +#define ISST_IF_MBOX_COMMAND _IOWR(ISST_IF_MAGIC, 3, struct isst_if_mbox_cmds *) #endif |