ocxl: Add get_metadata IOCTL to share OCXL information to userspace (07c5ccd7) · Commits · 戴 / test

drivers/misc/ocxl/file.c

+27 −0

Original line number	Diff line number	Diff line
		@@ -102,10 +102,32 @@ static long afu_ioctl_attach(struct ocxl_context *ctx,
		return rc;
		}

		static long afu_ioctl_get_metadata(struct ocxl_context *ctx,
		struct ocxl_ioctl_metadata __user *uarg)
		{
		struct ocxl_ioctl_metadata arg;

		memset(&arg, 0, sizeof(arg));

		arg.version = 0;

		arg.afu_version_major = ctx->afu->config.version_major;
		arg.afu_version_minor = ctx->afu->config.version_minor;
		arg.pasid = ctx->pasid;
		arg.pp_mmio_size = ctx->afu->config.pp_mmio_stride;
		arg.global_mmio_size = ctx->afu->config.global_mmio_size;

		if (copy_to_user(uarg, &arg, sizeof(arg)))
		return -EFAULT;

		return 0;
		}

		#define CMD_STR(x) (x == OCXL_IOCTL_ATTACH ? "ATTACH" : \
		x == OCXL_IOCTL_IRQ_ALLOC ? "IRQ_ALLOC" : \
		x == OCXL_IOCTL_IRQ_FREE ? "IRQ_FREE" : \
		x == OCXL_IOCTL_IRQ_SET_FD ? "IRQ_SET_FD" : \
		x == OCXL_IOCTL_GET_METADATA ? "GET_METADATA" : \
		"UNKNOWN")

		static long afu_ioctl(struct file *file, unsigned int cmd,
		@@ -159,6 +181,11 @@ static long afu_ioctl(struct file *file, unsigned int cmd,
		irq_fd.eventfd);
		break;

		case OCXL_IOCTL_GET_METADATA:
		rc = afu_ioctl_get_metadata(ctx,
		(struct ocxl_ioctl_metadata __user *) args);
		break;

		default:
		rc = -EINVAL;
		}

+17 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,22 @@ struct ocxl_ioctl_attach {
		__u64 reserved3;
		};

		struct ocxl_ioctl_metadata {
		__u16 version; // struct version, always backwards compatible

		// Version 0 fields
		__u8 afu_version_major;
		__u8 afu_version_minor;
		__u32 pasid; // PASID assigned to the current context

		__u64 pp_mmio_size; // Per PASID MMIO size
		__u64 global_mmio_size;

		// End version 0 fields

		__u64 reserved[13]; // Total of 16*u64
		};

		struct ocxl_ioctl_irq_fd {
		__u64 irq_offset;
		__s32 eventfd;
		@@ -45,5 +61,6 @@ struct ocxl_ioctl_irq_fd {
		#define OCXL_IOCTL_IRQ_ALLOC _IOR(OCXL_MAGIC, 0x11, __u64)
		#define OCXL_IOCTL_IRQ_FREE _IOW(OCXL_MAGIC, 0x12, __u64)
		#define OCXL_IOCTL_IRQ_SET_FD _IOW(OCXL_MAGIC, 0x13, struct ocxl_ioctl_irq_fd)
		#define OCXL_IOCTL_GET_METADATA _IOR(OCXL_MAGIC, 0x14, struct ocxl_ioctl_metadata)

		#endif /* _UAPI_MISC_OCXL_H */