diff options
Diffstat (limited to 'drivers/misc/ibmvmc.h')
| -rw-r--r-- | drivers/misc/ibmvmc.h | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/drivers/misc/ibmvmc.h b/drivers/misc/ibmvmc.h new file mode 100644 index 000000000..0e1756fff --- /dev/null +++ b/drivers/misc/ibmvmc.h @@ -0,0 +1,209 @@ +/* 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 */ |