/* SPDX-License-Identifier: GPL-2.0+ *//* * linux/drivers/misc/ibmvmc.h * * IBM Power Systems Virtual Management Channel Support. * * Copyright (c) 2004, 2018 IBM Corp. *   Dave Engebretsen engebret@us.ibm.com *   Steven Royer seroyer@linux.vnet.ibm.com *   Adam Reznechek adreznec@linux.vnet.ibm.com *   Bryant G. Ly <bryantly@linux.vnet.ibm.com> */#ifndef IBMVMC_H#define IBMVMC_H #include <linux/types.h>#include <linux/cdev.h> #include <asm/vio.h> #define IBMVMC_PROTOCOL_VERSION    0x0101 #define MIN_BUF_POOL_SIZE 16#define MIN_HMCS          1#define MIN_MTU           4096#define MAX_BUF_POOL_SIZE 64#define MAX_HMCS          2#define MAX_MTU           (4 * 4096)#define DEFAULT_BUF_POOL_SIZE 32#define DEFAULT_HMCS          1#define DEFAULT_MTU           4096#define HMC_ID_LEN        32 #define VMC_INVALID_BUFFER_ID 0xFFFF /* ioctl numbers */#define VMC_BASE	     0xCC#define VMC_IOCTL_SETHMCID   _IOW(VMC_BASE, 0x00, unsigned char *)#define VMC_IOCTL_QUERY      _IOR(VMC_BASE, 0x01, struct ibmvmc_query_struct)#define VMC_IOCTL_REQUESTVMC _IOR(VMC_BASE, 0x02, u32) #define VMC_MSG_CAP          0x01#define VMC_MSG_CAP_RESP     0x81#define VMC_MSG_OPEN         0x02#define VMC_MSG_OPEN_RESP    0x82#define VMC_MSG_CLOSE        0x03#define VMC_MSG_CLOSE_RESP   0x83#define VMC_MSG_ADD_BUF      0x04#define VMC_MSG_ADD_BUF_RESP 0x84#define VMC_MSG_REM_BUF      0x05#define VMC_MSG_REM_BUF_RESP 0x85#define VMC_MSG_SIGNAL       0x06 #define VMC_MSG_SUCCESS 0#define VMC_MSG_INVALID_HMC_INDEX 1#define VMC_MSG_INVALID_BUFFER_ID 2#define VMC_MSG_CLOSED_HMC        3#define VMC_MSG_INTERFACE_FAILURE 4#define VMC_MSG_NO_BUFFER         5 #define VMC_BUF_OWNER_ALPHA 0#define VMC_BUF_OWNER_HV    1 enum ibmvmc_states {	ibmvmc_state_sched_reset  = -1,	ibmvmc_state_initial      = 0,	ibmvmc_state_crqinit      = 1,	ibmvmc_state_capabilities = 2,	ibmvmc_state_ready        = 3,	ibmvmc_state_failed       = 4,}; enum ibmhmc_states {	/* HMC connection not established */	ibmhmc_state_free    = 0, 	/* HMC connection established (open called) */	ibmhmc_state_initial = 1, 	/* open msg sent to HV, due to ioctl(1) call */	ibmhmc_state_opening = 2, 	/* HMC connection ready, open resp msg from HV */	ibmhmc_state_ready   = 3, 	/* HMC connection failure */	ibmhmc_state_failed  = 4,}; struct ibmvmc_buffer {	u8 valid;	/* 1 when DMA storage allocated to buffer          */	u8 free;	/* 1 when buffer available for the Alpha Partition */	u8 owner;	u16 id;	u32 size;	u32 msg_len;	dma_addr_t dma_addr_local;	dma_addr_t dma_addr_remote;	void *real_addr_local;}; struct ibmvmc_admin_crq_msg {	u8 valid;	/* RPA Defined           */	u8 type;	/* ibmvmc msg type       */	u8 status;	/* Response msg status. Zero is success and on failure,			 * either 1 - General Failure, or 2 - Invalid Version is			 * returned.			 */	u8 rsvd[2];	u8 max_hmc;	/* Max # of independent HMC connections supported */	__be16 pool_size;	/* Maximum number of buffers supported per HMC				 * connection				 */	__be32 max_mtu;		/* Maximum message size supported (bytes) */	__be16 crq_size;	/* # of entries available in the CRQ for the				 * source partition. The target partition must				 * limit the number of outstanding messages to				 * one half or less.				 */	__be16 version;	/* Indicates the code level of the management partition			 * or the hypervisor with the high-order byte			 * indicating a major version and the low-order byte			 * indicating a minor version.			 */}; struct ibmvmc_crq_msg {	u8 valid;     /* RPA Defined           */	u8 type;      /* ibmvmc msg type       */	u8 status;    /* Response msg status   */	union {		u8 rsvd;  /* Reserved              */		u8 owner;	} var1;	u8 hmc_session;	/* Session Identifier for the current VMC connection */	u8 hmc_index;	/* A unique HMC Idx would be used if multiple management			 * applications running concurrently were desired			 */	union {		__be16 rsvd;		__be16 buffer_id;	} var2;	__be32 rsvd;	union {		__be32 rsvd;		__be32 lioba;		__be32 msg_len;	} var3;}; /* an RPA command/response transport queue */struct crq_queue {	struct ibmvmc_crq_msg *msgs;	int size, cur;	dma_addr_t msg_token;	spinlock_t lock;}; /* VMC server adapter settings */struct crq_server_adapter {	struct device *dev;	struct crq_queue queue;	u32 liobn;	u32 riobn;	struct tasklet_struct work_task;	wait_queue_head_t reset_wait_queue;	struct task_struct *reset_task;}; /* Driver wide settings */struct ibmvmc_struct {	u32 state;	u32 max_mtu;	u32 max_buffer_pool_size;	u32 max_hmc_index;	struct crq_server_adapter *adapter;	struct cdev cdev;	u32 vmc_drc_index;}; struct ibmvmc_file_session; /* Connection specific settings */struct ibmvmc_hmc {	u8 session;	u8 index;	u32 state;	struct crq_server_adapter *adapter;	spinlock_t lock;	unsigned char hmc_id[HMC_ID_LEN];	struct ibmvmc_buffer buffer[MAX_BUF_POOL_SIZE];	unsigned short queue_outbound_msgs[MAX_BUF_POOL_SIZE];	int queue_head, queue_tail;	struct ibmvmc_file_session *file_session;}; struct ibmvmc_file_session {	struct file *file;	struct ibmvmc_hmc *hmc;	bool valid;}; struct ibmvmc_query_struct {	int have_vmc;	int state;	int vmc_drc_index;}; #endif /* __IBMVMC_H */