| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Bryant G. Ly | 780 | 93.19% | 3 | 50.00% |
| Michael Cyr | 55 | 6.57% | 2 | 33.33% |
| Thomas Gleixner | 2 | 0.24% | 1 | 16.67% |
| Total | 837 | 6 |
/* SPDX-License-Identifier: GPL-2.0-or-later */ /******************************************************************************* * IBM Virtual SCSI Target Driver * Copyright (C) 2003-2005 Dave Boutcher (boutcher@us.ibm.com) IBM Corp. * Santiago Leon (santil@us.ibm.com) IBM Corp. * Linda Xie (lxie@us.ibm.com) IBM Corp. * * Copyright (C) 2005-2011 FUJITA Tomonori <tomof@acm.org> * Copyright (C) 2010 Nicholas A. Bellinger <nab@kernel.org> * Copyright (C) 2016 Bryant G. Ly <bryantly@linux.vnet.ibm.com> IBM Corp. * * Authors: Bryant G. Ly <bryantly@linux.vnet.ibm.com> * Authors: Michael Cyr <mikecyr@linux.vnet.ibm.com> * ****************************************************************************/ #ifndef __H_IBMVSCSI_TGT #define __H_IBMVSCSI_TGT #include <linux/interrupt.h> #include "libsrp.h" #define SYS_ID_NAME_LEN 64 #define PARTITION_NAMELEN 96 #define IBMVSCSIS_NAMELEN 32 #define MSG_HI 0 #define MSG_LOW 1 #define MAX_CMD_Q_PAGES 4 #define CRQ_PER_PAGE (PAGE_SIZE / sizeof(struct viosrp_crq)) /* in terms of number of elements */ #define DEFAULT_CMD_Q_SIZE CRQ_PER_PAGE #define MAX_CMD_Q_SIZE (DEFAULT_CMD_Q_SIZE * MAX_CMD_Q_PAGES) #define SRP_VIOLATION 0x102 /* general error code */ /* * SRP buffer formats defined as of 16.a supported by this driver. */ #define SUPPORTED_FORMATS ((SRP_DATA_DESC_DIRECT << 1) | \ (SRP_DATA_DESC_INDIRECT << 1)) #define SCSI_LUN_ADDR_METHOD_FLAT 1 struct dma_window { u32 liobn; /* Unique per vdevice */ u64 tce_base; /* Physical location of the TCE table */ u64 tce_size; /* Size of the TCE table in bytes */ }; struct target_dds { u64 unit_id; /* 64 bit will force alignment */ #define NUM_DMA_WINDOWS 2 #define LOCAL 0 #define REMOTE 1 struct dma_window window[NUM_DMA_WINDOWS]; /* root node property "ibm,partition-no" */ uint partition_num; char partition_name[PARTITION_NAMELEN]; }; #define MAX_NUM_PORTS 1 #define MAX_H_COPY_RDMA (128 * 1024) #define MAX_EYE 64 /* Return codes */ #define ADAPT_SUCCESS 0L /* choose error codes that do not conflict with PHYP */ #define ERROR -40L struct format_code { u8 reserved; u8 buffers; }; struct client_info { #define SRP_VERSION "16.a" char srp_version[8]; /* root node property ibm,partition-name */ char partition_name[PARTITION_NAMELEN]; /* root node property ibm,partition-no */ u32 partition_number; /* initially 1 */ u32 mad_version; u32 os_type; }; /* * Changing this constant changes the number of seconds to wait before * considering the client will never service its queue again. */ #define SECONDS_TO_CONSIDER_FAILED 30 /* * These constants set the polling period used to determine if the client * has freed at least one element in the response queue. */ #define WAIT_SECONDS 1 #define WAIT_NANO_SECONDS 5000 #define MAX_TIMER_POPS ((1000000 / WAIT_NANO_SECONDS) * \ SECONDS_TO_CONSIDER_FAILED) /* * general purpose timer control block * which can be used for multiple functions */ struct timer_cb { struct hrtimer timer; /* * how long has it been since the client * serviced the queue. The variable is incrmented * in the service_wait_q routine and cleared * in send messages */ int timer_pops; /* the timer is started */ bool started; }; struct cmd_queue { /* kva */ struct viosrp_crq *base_addr; dma_addr_t crq_token; /* used to maintain index */ uint mask; /* current element */ uint index; int size; }; #define SCSOLNT_RESP_SHIFT 1 #define UCSOLNT_RESP_SHIFT 2 #define SCSOLNT BIT(SCSOLNT_RESP_SHIFT) #define UCSOLNT BIT(UCSOLNT_RESP_SHIFT) enum cmd_type { SCSI_CDB = 0x01, TASK_MANAGEMENT = 0x02, /* MAD or addressed to port 0 */ ADAPTER_MAD = 0x04, UNSET_TYPE = 0x08, }; struct iu_rsp { u8 format; u8 sol_not; u16 len; /* tag is just to help client identify cmd, so don't translate be/le */ u64 tag; }; struct ibmvscsis_cmd { struct list_head list; /* Used for TCM Core operations */ struct se_cmd se_cmd; struct iu_entry *iue; struct iu_rsp rsp; struct work_struct work; struct scsi_info *adapter; struct ibmvscsis_cmd *abort_cmd; /* Sense buffer that will be mapped into outgoing status */ unsigned char sense_buf[TRANSPORT_SENSE_BUFFER]; u64 init_time; #define CMD_FAST_FAIL BIT(0) #define DELAY_SEND BIT(1) u32 flags; char type; }; struct ibmvscsis_nexus { struct se_session *se_sess; }; struct ibmvscsis_tport { /* SCSI protocol the tport is providing */ u8 tport_proto_id; /* ASCII formatted WWPN for SRP Target port */ char tport_name[IBMVSCSIS_NAMELEN]; /* Returned by ibmvscsis_make_tport() */ struct se_wwn tport_wwn; /* Returned by ibmvscsis_make_tpg() */ struct se_portal_group se_tpg; /* ibmvscsis port target portal group tag for TCM */ u16 tport_tpgt; /* Pointer to TCM session for I_T Nexus */ struct ibmvscsis_nexus *ibmv_nexus; bool enabled; bool releasing; }; struct scsi_info { struct list_head list; char eye[MAX_EYE]; /* commands waiting for space on repsonse queue */ struct list_head waiting_rsp; #define NO_QUEUE 0x00 #define WAIT_ENABLED 0X01 #define WAIT_CONNECTION 0x04 /* have established a connection */ #define CONNECTED 0x08 /* at least one port is processing SRP IU */ #define SRP_PROCESSING 0x10 /* remove request received */ #define UNCONFIGURING 0x20 /* disconnect by letting adapter go idle, no error */ #define WAIT_IDLE 0x40 /* disconnecting to clear an error */ #define ERR_DISCONNECT 0x80 /* disconnect to clear error state, then come back up */ #define ERR_DISCONNECT_RECONNECT 0x100 /* disconnected after clearing an error */ #define ERR_DISCONNECTED 0x200 /* A series of errors caused unexpected errors */ #define UNDEFINED 0x400 u16 state; int fast_fail; struct target_dds dds; char *cmd_pool; /* list of free commands */ struct list_head free_cmd; /* command elements ready for scheduler */ struct list_head schedule_q; /* commands sent to TCM */ struct list_head active_q; caddr_t *map_buf; /* ioba of map buffer */ dma_addr_t map_ioba; /* allowable number of outstanding SRP requests */ int request_limit; /* extra credit */ int credit; /* outstanding transactions against credit limit */ int debit; /* allow only one outstanding mad request */ #define PROCESSING_MAD 0x00002 /* Waiting to go idle */ #define WAIT_FOR_IDLE 0x00004 /* H_REG_CRQ called */ #define CRQ_CLOSED 0x00010 /* detected that client has failed */ #define CLIENT_FAILED 0x00040 /* detected that transport event occurred */ #define TRANS_EVENT 0x00080 /* don't attempt to send anything to the client */ #define RESPONSE_Q_DOWN 0x00100 /* request made to schedule disconnect handler */ #define SCHEDULE_DISCONNECT 0x00400 /* disconnect handler is scheduled */ #define DISCONNECT_SCHEDULED 0x00800 /* remove function is sleeping */ #define CFG_SLEEPING 0x01000 /* Register for Prepare for Suspend Transport Events */ #define PREP_FOR_SUSPEND_ENABLED 0x02000 /* Prepare for Suspend event sent */ #define PREP_FOR_SUSPEND_PENDING 0x04000 /* Resume from Suspend event sent */ #define PREP_FOR_SUSPEND_ABORTED 0x08000 /* Prepare for Suspend event overwrote another CRQ entry */ #define PREP_FOR_SUSPEND_OVERWRITE 0x10000 u32 flags; /* adapter lock */ spinlock_t intr_lock; /* information needed to manage command queue */ struct cmd_queue cmd_q; /* used in hcall to copy response back into srp buffer */ u64 empty_iu_id; /* used in crq, to tag what iu the response is for */ u64 empty_iu_tag; uint new_state; uint resume_state; /* control block for the response queue timer */ struct timer_cb rsp_q_timer; /* keep last client to enable proper accounting */ struct client_info client_data; /* what can this client do */ u32 client_cap; /* * The following two fields capture state and flag changes that * can occur when the lock is given up. In the orginal design, * the lock was held during calls into phyp; * however, phyp did not meet PAPR architecture. This is * a work around. */ u16 phyp_acr_state; u32 phyp_acr_flags; struct workqueue_struct *work_q; struct completion wait_idle; struct completion unconfig; struct device dev; struct vio_dev *dma_dev; struct srp_target target; struct ibmvscsis_tport tport; struct tasklet_struct work_task; struct work_struct proc_work; }; /* * Provide a constant that allows software to detect the adapter is * disconnecting from the client from one of several states. */ #define IS_DISCONNECTING (UNCONFIGURING | ERR_DISCONNECT_RECONNECT | \ ERR_DISCONNECT) /* * Provide a constant that can be used with interrupt handling that * essentially lets the interrupt handler know that all requests should * be thrown out, */ #define DONT_PROCESS_STATE (IS_DISCONNECTING | UNDEFINED | \ ERR_DISCONNECTED | WAIT_IDLE) /* * If any of these flag bits are set then do not allow the interrupt * handler to schedule the off level handler. */ #define BLOCK (DISCONNECT_SCHEDULED) /* State and transition events that stop the interrupt handler */ #define TARGET_STOP(VSCSI) (long)(((VSCSI)->state & DONT_PROCESS_STATE) | \ ((VSCSI)->flags & BLOCK)) #define PREP_FOR_SUSPEND_FLAGS (PREP_FOR_SUSPEND_ENABLED | \ PREP_FOR_SUSPEND_PENDING | \ PREP_FOR_SUSPEND_ABORTED | \ PREP_FOR_SUSPEND_OVERWRITE) /* flag bit that are not reset during disconnect */ #define PRESERVE_FLAG_FIELDS (PREP_FOR_SUSPEND_FLAGS) #define vio_iu(IUE) ((union viosrp_iu *)((IUE)->sbuf->buf)) #define READ_CMD(cdb) (((cdb)[0] & 0x1F) == 8) #define WRITE_CMD(cdb) (((cdb)[0] & 0x1F) == 0xA) #ifndef H_GET_PARTNER_INFO #define H_GET_PARTNER_INFO 0x0000000000000008LL #endif #ifndef H_ENABLE_PREPARE_FOR_SUSPEND #define H_ENABLE_PREPARE_FOR_SUSPEND 0x000000000000001DLL #endif #ifndef H_READY_FOR_SUSPEND #define H_READY_FOR_SUSPEND 0x000000000000001ELL #endif #define h_copy_rdma(l, sa, sb, da, db) \ plpar_hcall_norets(H_COPY_RDMA, l, sa, sb, da, db) #define h_vioctl(u, o, a, u1, u2, u3, u4) \ plpar_hcall_norets(H_VIOCTL, u, o, a, u1, u2) #define h_reg_crq(ua, tok, sz) \ plpar_hcall_norets(H_REG_CRQ, ua, tok, sz) #define h_free_crq(ua) \ plpar_hcall_norets(H_FREE_CRQ, ua) #define h_send_crq(ua, d1, d2) \ plpar_hcall_norets(H_SEND_CRQ, ua, d1, d2) #endif
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