/*- * 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. * * $FreeBSD$ */ /* * CISS adapter driver datastructures */ /************************************************************************ * 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 256 /* * Maximum number of logical drives we support. */ #define CISS_MAX_LOGICAL 15 /* * 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 paramters. 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 1000 #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 /************************************************************************ * Compatibility with older versions of FreeBSD */ #if __FreeBSD_version < 440001 #warning testing old-FreeBSD compat typedef struct proc d_thread_t; #endif /************************************************************************ * Command queue statistics */ #define CISSQ_FREE 0 #define CISSQ_BUSY 1 #define CISSQ_COMPLETE 2 #define CISSQ_NOTIFY 3 #define CISSQ_COUNT 4 struct ciss_qstat { u_int32_t q_length; u_int32_t q_max; }; /************************************************************************ * 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 { TAILQ_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 */ 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 */ void (* cr_complete)(struct ciss_request *); void *cr_private; }; /* * 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. * * Note that 512 bytes yields 28 scatter/gather entries, or the * ability to map (26 * PAGE_SIZE) + 2 bytes of data. On x86, this is * 104kB. 256 bytes would only yield 12 entries, giving a mere 40kB, * too small. */ #define CISS_COMMAND_ALLOC_SIZE 512 /* XXX tune to get sensible s/g list length */ #define CISS_COMMAND_SG_LENGTH ((CISS_COMMAND_ALLOC_SIZE - sizeof(struct ciss_command)) \ / sizeof(struct ciss_sg_entry)) /* * 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-adapter data */ struct ciss_softc { /* bus connections */ device_t ciss_dev; /* bus attachment */ dev_t 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_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 */ struct resource *ciss_irq_resource; /* interrupt */ int ciss_irq_rid; /* 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 */ 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 */ TAILQ_HEAD(,ciss_request) ciss_free; /* requests available for reuse */ TAILQ_HEAD(,ciss_request) ciss_busy; /* requests in the adapter */ TAILQ_HEAD(,ciss_request) ciss_complete; /* requests which have been returned by the adapter */ TAILQ_HEAD(,ciss_request) ciss_notify; /* requests which are defered for processing */ struct proc *ciss_notify_thread; struct callout_handle ciss_periodic; /* periodic event handling */ struct ciss_request *ciss_periodic_notify; /* notify callback request */ struct ciss_ldrive **ciss_logical; union ciss_device_address *ciss_controllers; /* controller address */ int ciss_max_bus_number; /* maximum bus number */ struct cam_devq *ciss_cam_devq; struct cam_sim **ciss_cam_sim; 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_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 */ }; /* * Given a request tag, find the corresponding command in virtual or * physical space. * * The arithmetic here is due to the allocation of ciss_command structures * inside CISS_COMMAND_ALLOC_SIZE blocks. See the comment at the definition * of CISS_COMMAND_ALLOC_SIZE above. */ #define CISS_FIND_COMMAND(cr) \ (struct ciss_command *)((u_int8_t *)(cr)->cr_sc->ciss_command + \ ((cr)->cr_tag * CISS_COMMAND_ALLOC_SIZE)) #define CISS_FIND_COMMANDPHYS(cr) ((cr)->cr_sc->ciss_command_phys + \ ((cr)->cr_tag * CISS_COMMAND_ALLOC_SIZE)) /************************************************************************ * 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) \ { \ TAILQ_INIT(&sc->ciss_ ## name); \ CISSQ_INIT(sc, index); \ } \ static __inline void \ ciss_enqueue_ ## name (struct ciss_request *cr) \ { \ int s; \ \ s = splcam(); \ TAILQ_INSERT_TAIL(&cr->cr_sc->ciss_ ## name, cr, cr_link); \ CISSQ_ADD(cr->cr_sc, index); \ cr->cr_onq = index; \ splx(s); \ } \ static __inline void \ ciss_requeue_ ## name (struct ciss_request *cr) \ { \ int s; \ \ s = splcam(); \ TAILQ_INSERT_HEAD(&cr->cr_sc->ciss_ ## name, cr, cr_link); \ CISSQ_ADD(cr->cr_sc, index); \ cr->cr_onq = index; \ splx(s); \ } \ static __inline struct ciss_request * \ ciss_dequeue_ ## name (struct ciss_softc *sc) \ { \ struct ciss_request *cr; \ int s; \ \ s = splcam(); \ if ((cr = TAILQ_FIRST(&sc->ciss_ ## name)) != NULL) { \ TAILQ_REMOVE(&sc->ciss_ ## name, cr, cr_link); \ CISSQ_REMOVE(sc, index); \ cr->cr_onq = -1; \ } \ splx(s); \ return(cr); \ } \ static __inline int \ ciss_remove_ ## name (struct ciss_request *cr) \ { \ int s, error; \ \ s = splcam(); \ if (cr->cr_onq != index) { \ printf("request on queue %d (expected %d)\n", cr->cr_onq, index);\ error = 1; \ } else { \ TAILQ_REMOVE(&cr->cr_sc->ciss_ ## name, cr, cr_link); \ CISSQ_REMOVE(cr->cr_sc, index); \ cr->cr_onq = -1; \ error = 0; \ } \ splx(s); \ return(error); \ } \ struct hack CISSQ_REQUEST_QUEUE(free, CISSQ_FREE); CISSQ_REQUEST_QUEUE(busy, CISSQ_BUSY); CISSQ_REQUEST_QUEUE(complete, CISSQ_COMPLETE); CISSQ_REQUEST_QUEUE(notify, CISSQ_NOTIFY); /******************************************************************************** * 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++ = ' '; } } }