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| author | Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2019-06-26 15:38:46 -0700 |
|---|---|---|
| committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-07-02 18:41:16 +0300 |
| commit | d3a23584294c1f379239a3b52bac13e03fecd147 (patch) | |
| tree | cb8961a51aa295fa176ece63a9db16eae2c28f8c /include | |
| parent | fb5b36a413b9f30fba573fc2a596ab7142dfaf12 (diff) | |
| download | linux-stable-d3a23584294c1f379239a3b52bac13e03fecd147.tar.gz linux-stable-d3a23584294c1f379239a3b52bac13e03fecd147.tar.bz2 linux-stable-d3a23584294c1f379239a3b52bac13e03fecd147.zip | |
platform/x86: ISST: Add Intel Speed Select mmio interface
Added MMIO interface to read/write specific offsets in PUNIT PCI device
which export core priortization. This MMIO interface can be used using
ioctl interface on /dev/isst_interface using IOCTL ISST_IF_IO_CMD.
This MMIO interface is used by the intel-speed-select tool under
tools/x86/power to enumerate and set core priority. The MMIO offsets 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')
| -rw-r--r-- | include/uapi/linux/isst_if.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/uapi/linux/isst_if.h b/include/uapi/linux/isst_if.h index 15d1f286a830..fe2492ade078 100644 --- a/include/uapi/linux/isst_if.h +++ b/include/uapi/linux/isst_if.h @@ -63,7 +63,40 @@ struct isst_if_cpu_maps { struct isst_if_cpu_map cpu_map[1]; }; +/** + * struct isst_if_io_reg - Read write PUNIT IO register + * @read_write: Value 0: Read, 1: Write + * @logical_cpu: Logical CPU number to get target PCI device. + * @reg: PUNIT register offset + * @value: For write operation value to write and for + * for read placeholder read value + * + * Structure to specify read/write data to PUNIT registers. + */ +struct isst_if_io_reg { + __u32 read_write; /* Read:0, Write:1 */ + __u32 logical_cpu; + __u32 reg; + __u32 value; +}; + +/** + * struct isst_if_io_regs - structure for IO register commands + * @cmd_count: Number of io reg commands in io_reg[] + * @io_reg[]: Holds one or more io_reg command structure + * + * This structure used with ioctl ISST_IF_IO_CMD to send + * one or more read/write commands to PUNIT. Here IOCTL return value + * indicates number of requests sent or error number if no requests have + * been sent. + */ +struct isst_if_io_regs { + __u32 req_count; + struct isst_if_io_reg io_reg[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 *) #endif |