diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2025-03-07 23:55:33 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2025-03-17 20:41:37 +0300 |
| commit | 4d1c09cef2c244bd19467c016a3e56ba28ecc59d (patch) | |
| tree | ea90c22b90014a9d9808a5ccd13fe70b8cd10df1 /include | |
| parent | 9b8e73cdb1418f7c251c43b2082218ed9c0d0fee (diff) | |
| download | linux-4d1c09cef2c244bd19467c016a3e56ba28ecc59d.tar.xz | |
cxl: Add support for fwctl RPC command to enable CXL feature commands
fwctl provides a fwctl_ops->fw_rpc() callback in order to issue ioctls
to a device. The cxl fwctl driver will start by supporting the CXL
Feature commands: Get Supported Features, Get Feature, and Set Feature.
The fw_rpc() callback provides 'enum fwctl_rpc_scope' parameter where
it indicates the security scope of the call. The Get Supported Features
and Get Feature calls can be executed with the scope of
FWCTL_RPC_CONFIGRATION. The Set Feature call is gated by the effects
of the Feature reported by Get Supported Features call for the specific
Feature.
Only "Get Supported Features" is supported in this patch. Additional
commands will be added in follow on patches. "Get Supported Features"
will filter the Features that are exclusive to the kernel. The flag
field of the Feature details will be cleared of the "Changeable"
field and the "set feat size" will be set to 0 to indicate that
the feature is not changeable.
Link: https://patch.msgid.link/r/20250307205648.1021626-4-dave.jiang@intel.com
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Li Ming <ming.li@zohomail.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/cxl/features.h | 1 | ||||
| -rw-r--r-- | include/uapi/fwctl/cxl.h | 46 |
2 files changed, 47 insertions, 0 deletions
diff --git a/include/uapi/cxl/features.h b/include/uapi/cxl/features.h index 7f7ab4aefec2..d6db8984889f 100644 --- a/include/uapi/cxl/features.h +++ b/include/uapi/cxl/features.h @@ -42,6 +42,7 @@ struct cxl_mbox_get_sup_feats_in { #define CXL_CMD_EFFECTS_VALID BIT(9) #define CXL_CMD_CONFIG_CHANGE_CONV_RESET BIT(10) #define CXL_CMD_CONFIG_CHANGE_CXL_RESET BIT(11) +#define CXL_CMD_EFFECTS_RESERVED GENMASK(15, 12) /* * struct cxl_feat_entry - Supported Feature Entry diff --git a/include/uapi/fwctl/cxl.h b/include/uapi/fwctl/cxl.h new file mode 100644 index 000000000000..4bbfd7727526 --- /dev/null +++ b/include/uapi/fwctl/cxl.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * Copyright (c) 2024-2025 Intel Corporation + * + * These are definitions for the mailbox command interface of CXL subsystem. + */ +#ifndef _UAPI_FWCTL_CXL_H_ +#define _UAPI_FWCTL_CXL_H_ + +#include <linux/types.h> +#include <linux/stddef.h> +#include <cxl/features.h> + +/** + * struct fwctl_rpc_cxl - ioctl(FWCTL_RPC) input for CXL + * @opcode: CXL mailbox command opcode + * @flags: Flags for the command (input). + * @op_size: Size of input payload. + * @reserved1: Reserved. Must be 0s. + * @get_sup_feats_in: Get Supported Features input + */ +struct fwctl_rpc_cxl { + __struct_group(fwctl_rpc_cxl_hdr, hdr, /* no attrs */, + __u32 opcode; + __u32 flags; + __u32 op_size; + __u32 reserved1; + ); + struct cxl_mbox_get_sup_feats_in get_sup_feats_in; +}; + +/** + * struct fwctl_rpc_cxl_out - ioctl(FWCTL_RPC) output for CXL + * @size: Size of the output payload + * @retval: Return value from device + * @get_sup_feats_out: Get Supported Features output + */ +struct fwctl_rpc_cxl_out { + __struct_group(fwctl_rpc_cxl_out_hdr, hdr, /* no attrs */, + __u32 size; + __u32 retval; + ); + struct cxl_mbox_get_sup_feats_out get_sup_feats_out; +}; + +#endif |