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![Bryant G. Ly](/assets/img/avatar_default.png)
This driver is a logical device which provides an interface between the hypervisor and a management partition. This interface is like a message passing interface. This management partition is intended to provide an alternative to HMC-based system management. VMC enables the Management LPAR to provide basic logical partition functions: - Logical Partition Configuration - Boot, start, and stop actions for individual partitions - Display of partition status - Management of virtual Ethernet - Management of virtual Storage - Basic system management This driver is to be used for the POWER Virtual Management Channel Virtual Adapter on the PowerPC platform. It provides a character device which allows for both request/response and async message support through the /dev/ibmvmc node. Signed-off-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com> Reviewed-by: Steven Royer <seroyer@linux.vnet.ibm.com> Reviewed-by: Adam Reznechek <adreznec@linux.vnet.ibm.com> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Taylor Jakobson <tjakobs@us.ibm.com> Tested-by: Brad Warrum <bwarrum@us.ibm.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
209 lines
5.2 KiB
C
209 lines
5.2 KiB
C
/* 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 engebret@us.ibm.com
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* Steven Royer seroyer@linux.vnet.ibm.com
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* Adam Reznechek adreznec@linux.vnet.ibm.com
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* Bryant G. Ly <bryantly@linux.vnet.ibm.com>
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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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