/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2001 Michael Smith * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * CISS adapter driver datastructures */ typedef STAILQ_HEAD(, ciss_request) cr_qhead_t; /************************************************************************ * Tunable parameters */ /* * There is no guaranteed upper bound on the number of concurrent * commands an adapter may claim to support. Cap it at a reasonable * value. */ #define CISS_MAX_REQUESTS 1024 /* * Maximum number of logical drives we support. * If the controller does not indicate a maximum * value. This is a compatibiliy value to support * older ciss controllers (e.g. model 6i) */ #define CISS_MAX_LOGICAL 16 /* * Maximum number of physical devices we support. */ #define CISS_MAX_PHYSICAL 1024 /* * Interrupt reduction can be controlled by tuning the interrupt * coalesce delay and count parameters. The delay (in microseconds) * defers delivery of interrupts to increase the chance of there being * more than one completed command ready when the interrupt is * delivered. The count expedites the delivery of the interrupt when * the given number of commands are ready. * * If the delay is set to 0, interrupts are delivered immediately. */ #define CISS_INTERRUPT_COALESCE_DELAY 0 #define CISS_INTERRUPT_COALESCE_COUNT 16 /* * Heartbeat routine timeout in seconds. Note that since event * handling is performed on a callback basis, we don't need this to * run very often. */ #define CISS_HEARTBEAT_RATE 10 /************************************************************************ * Driver version. Only really significant to the ACU interface. */ #define CISS_DRIVER_VERSION 20011201 /************************************************************************ * Driver data structures */ /* * Each command issued to the adapter is managed by a request * structure. */ struct ciss_request { STAILQ_ENTRY(ciss_request) cr_link; int cr_onq; /* which queue we are on */ struct ciss_softc *cr_sc; /* controller softc */ void *cr_data; /* data buffer */ u_int32_t cr_length; /* data length */ bus_dmamap_t cr_datamap; /* DMA map for data */ struct ciss_command *cr_cc; uint32_t cr_ccphys; int cr_tag; int cr_flags; #define CISS_REQ_MAPPED (1<<0) /* data mapped */ #define CISS_REQ_SLEEP (1<<1) /* submitter sleeping */ #define CISS_REQ_POLL (1<<2) /* submitter polling */ #define CISS_REQ_DATAOUT (1<<3) /* data host->adapter */ #define CISS_REQ_DATAIN (1<<4) /* data adapter->host */ #define CISS_REQ_BUSY (1<<5) /* controller has req */ #define CISS_REQ_CCB (1<<6) /* data is ccb */ void (* cr_complete)(struct ciss_request *); void *cr_private; int cr_sg_tag; #define CISS_SG_MAX ((CISS_SG_FETCH_MAX << 1) | 0x1) #define CISS_SG_1 ((CISS_SG_FETCH_1 << 1) | 0x01) #define CISS_SG_2 ((CISS_SG_FETCH_2 << 1) | 0x01) #define CISS_SG_4 ((CISS_SG_FETCH_4 << 1) | 0x01) #define CISS_SG_8 ((CISS_SG_FETCH_8 << 1) | 0x01) #define CISS_SG_16 ((CISS_SG_FETCH_16 << 1) | 0x01) #define CISS_SG_32 ((CISS_SG_FETCH_32 << 1) | 0x01) #define CISS_SG_NONE ((CISS_SG_FETCH_NONE << 1) | 0x01) }; /* * The adapter command structure is defined with a zero-length * scatter/gather list size. In practise, we want space for a * scatter-gather list, and we also want to avoid having commands * cross page boundaries. * * The size of the ciss_command is 52 bytes. 65 s/g elements are reserved * to allow a max i/o size of 256k. This gives a total command size of * 1120 bytes, including the 32 byte alignment padding. Modern controllers * seem to saturate nicely at this value. */ #define CISS_MAX_SG_ELEMENTS 65 #define CISS_COMMAND_ALIGN 32 #define CISS_COMMAND_SG_LENGTH (sizeof(struct ciss_sg_entry) * CISS_MAX_SG_ELEMENTS) #define CISS_COMMAND_ALLOC_SIZE (roundup2(sizeof(struct ciss_command) + CISS_COMMAND_SG_LENGTH, CISS_COMMAND_ALIGN)) /* * Per-logical-drive data. */ struct ciss_ldrive { union ciss_device_address cl_address; union ciss_device_address *cl_controller; int cl_status; #define CISS_LD_NONEXISTENT 0 #define CISS_LD_ONLINE 1 #define CISS_LD_OFFLINE 2 int cl_update; struct ciss_bmic_id_ldrive *cl_ldrive; struct ciss_bmic_id_lstatus *cl_lstatus; struct ciss_ldrive_geometry cl_geometry; char cl_name[16]; /* device name */ }; /* * Per-physical-drive data */ struct ciss_pdrive { union ciss_device_address cp_address; int cp_online; }; #define CISS_PHYSICAL_SHIFT 5 #define CISS_PHYSICAL_BASE (1 << CISS_PHYSICAL_SHIFT) #define CISS_MAX_PHYSTGT 256 #define CISS_IS_PHYSICAL(bus) (bus >= CISS_PHYSICAL_BASE) #define CISS_CAM_TO_PBUS(bus) (bus - CISS_PHYSICAL_BASE) /* * Per-adapter data */ struct ciss_softc { /* bus connections */ device_t ciss_dev; /* bus attachment */ struct cdev *ciss_dev_t; /* control device */ struct resource *ciss_regs_resource; /* register interface window */ int ciss_regs_rid; /* resource ID */ bus_space_handle_t ciss_regs_bhandle; /* bus space handle */ bus_space_tag_t ciss_regs_btag; /* bus space tag */ struct resource *ciss_cfg_resource; /* config struct interface window */ int ciss_cfg_rid; /* resource ID */ struct ciss_config_table *ciss_cfg; /* config table in adapter memory */ struct ciss_perf_config *ciss_perf; /* config table for the performant */ struct ciss_bmic_id_table *ciss_id; /* ID table in host memory */ u_int32_t ciss_heartbeat; /* last heartbeat value */ int ciss_heart_attack; /* number of times we have seen this value */ int ciss_msi; struct resource *ciss_irq_resource; /* interrupt */ int ciss_irq_rid[CISS_MSI_COUNT]; /* resource ID */ void *ciss_intr; /* interrupt handle */ bus_dma_tag_t ciss_parent_dmat; /* parent DMA tag */ bus_dma_tag_t ciss_buffer_dmat; /* data buffer/command DMA tag */ u_int32_t ciss_interrupt_mask; /* controller interrupt mask bits */ uint64_t *ciss_reply; int ciss_cycle; int ciss_rqidx; bus_dma_tag_t ciss_reply_dmat; bus_dmamap_t ciss_reply_map; uint32_t ciss_reply_phys; int ciss_max_requests; struct ciss_request ciss_request[CISS_MAX_REQUESTS]; /* requests */ void *ciss_command; /* command structures */ bus_dma_tag_t ciss_command_dmat; /* command DMA tag */ bus_dmamap_t ciss_command_map; /* command DMA map */ u_int32_t ciss_command_phys; /* command array base address */ cr_qhead_t ciss_free; /* requests available for reuse */ cr_qhead_t ciss_notify; /* requests which are defered for processing */ struct proc *ciss_notify_thread; struct callout ciss_periodic; /* periodic event handling */ struct ciss_request *ciss_periodic_notify; /* notify callback request */ struct mtx ciss_mtx; struct ciss_ldrive **ciss_logical; struct ciss_pdrive **ciss_physical; union ciss_device_address *ciss_controllers; /* controller address */ int ciss_max_bus_number; /* maximum bus number */ int ciss_max_logical_bus; int ciss_max_physical_bus; int ciss_max_physical_target; /* highest physical target number */ struct cam_devq *ciss_cam_devq; struct cam_sim **ciss_cam_sim; int ciss_soft_reset; int ciss_flags; #define CISS_FLAG_NOTIFY_OK (1<<0) /* notify command running OK */ #define CISS_FLAG_CONTROL_OPEN (1<<1) /* control device is open */ #define CISS_FLAG_ABORTING (1<<2) /* driver is going away */ #define CISS_FLAG_RUNNING (1<<3) /* driver is running (interrupts usable) */ #define CISS_FLAG_BUSY (1<<4) /* no free commands */ #define CISS_FLAG_FAKE_SYNCH (1<<16) /* needs SYNCHRONISE_CACHE faked */ #define CISS_FLAG_BMIC_ABORT (1<<17) /* use BMIC command to abort Notify on Event */ #define CISS_FLAG_THREAD_SHUT (1<<20) /* shutdown the kthread */ struct ciss_qstat ciss_qstat[CISSQ_COUNT]; /* queue statistics */ }; /************************************************************************ * Debugging/diagnostic output. */ /* * Debugging levels: * 0 - quiet, only emit warnings * 1 - talkative, log major events, but nothing on the I/O path * 2 - noisy, log events on the I/O path * 3 - extremely noisy, log items in loops */ #ifdef CISS_DEBUG # define debug(level, fmt, args...) \ do { \ if (level <= CISS_DEBUG) printf("%s: " fmt "\n", __func__ , ##args); \ } while(0) # define debug_called(level) \ do { \ if (level <= CISS_DEBUG) printf("%s: called\n", __func__); \ } while(0) # define debug_struct(s) printf(" SIZE %s: %zu\n", #s, sizeof(struct s)) # define debug_union(s) printf(" SIZE %s: %zu\n", #s, sizeof(union s)) # define debug_type(s) printf(" SIZE %s: %zu\n", #s, sizeof(s)) # define debug_field(s, f) printf(" OFFSET %s.%s: %d\n", #s, #f, ((int)&(((struct s *)0)->f))) # define debug_const(c) printf(" CONST %s %jd/0x%jx\n", #c, (intmax_t)c, (intmax_t)c); #else # define debug(level, fmt, args...) # define debug_called(level) # define debug_struct(s) # define debug_union(s) # define debug_type(s) # define debug_field(s, f) # define debug_const(c) #endif #define ciss_printf(sc, fmt, args...) device_printf(sc->ciss_dev, fmt , ##args) /************************************************************************ * Queue primitives */ #define CISSQ_ADD(sc, qname) \ do { \ struct ciss_qstat *qs = &(sc)->ciss_qstat[qname]; \ \ qs->q_length++; \ if (qs->q_length > qs->q_max) \ qs->q_max = qs->q_length; \ } while(0) #define CISSQ_REMOVE(sc, qname) (sc)->ciss_qstat[qname].q_length-- #define CISSQ_INIT(sc, qname) \ do { \ sc->ciss_qstat[qname].q_length = 0; \ sc->ciss_qstat[qname].q_max = 0; \ } while(0) #define CISSQ_REQUEST_QUEUE(name, index) \ static __inline void \ ciss_initq_ ## name (struct ciss_softc *sc) \ { \ STAILQ_INIT(&sc->ciss_ ## name); \ CISSQ_INIT(sc, index); \ } \ static __inline void \ ciss_enqueue_ ## name (struct ciss_request *cr) \ { \ \ STAILQ_INSERT_TAIL(&cr->cr_sc->ciss_ ## name, cr, cr_link); \ CISSQ_ADD(cr->cr_sc, index); \ cr->cr_onq = index; \ } \ static __inline void \ ciss_requeue_ ## name (struct ciss_request *cr) \ { \ \ STAILQ_INSERT_HEAD(&cr->cr_sc->ciss_ ## name, cr, cr_link); \ CISSQ_ADD(cr->cr_sc, index); \ cr->cr_onq = index; \ } \ static __inline struct ciss_request * \ ciss_dequeue_ ## name (struct ciss_softc *sc) \ { \ struct ciss_request *cr; \ \ if ((cr = STAILQ_FIRST(&sc->ciss_ ## name)) != NULL) { \ STAILQ_REMOVE_HEAD(&sc->ciss_ ## name, cr_link); \ CISSQ_REMOVE(sc, index); \ cr->cr_onq = -1; \ } \ return(cr); \ } \ struct hack CISSQ_REQUEST_QUEUE(free, CISSQ_FREE); CISSQ_REQUEST_QUEUE(notify, CISSQ_NOTIFY); static __inline void ciss_enqueue_complete(struct ciss_request *ac, cr_qhead_t *head) { STAILQ_INSERT_TAIL(head, ac, cr_link); } static __inline struct ciss_request * ciss_dequeue_complete(struct ciss_softc *sc, cr_qhead_t *head) { struct ciss_request *ac; if ((ac = STAILQ_FIRST(head)) != NULL) STAILQ_REMOVE_HEAD(head, cr_link); return(ac); } /******************************************************************************** * space-fill a character string */ static __inline void padstr(char *targ, const char *src, int len) { while (len-- > 0) { if (*src != 0) { *targ++ = *src++; } else { *targ++ = ' '; } } } #define ciss_report_request(a, b, c) \ _ciss_report_request(a, b, c, __FUNCTION__)