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