diff options
Diffstat (limited to 'sys/dev/dpt/dpt_scsi.c')
| -rw-r--r-- | sys/dev/dpt/dpt_scsi.c | 2637 |
1 files changed, 2637 insertions, 0 deletions
diff --git a/sys/dev/dpt/dpt_scsi.c b/sys/dev/dpt/dpt_scsi.c new file mode 100644 index 0000000..9f28432 --- /dev/null +++ b/sys/dev/dpt/dpt_scsi.c @@ -0,0 +1,2637 @@ +/* + * Copyright (c) 1997 by Simon Shapiro + * 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, + * without modification, immediately at the beginning of the file. + * 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. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * 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. + */ + +/* + * dpt_scsi.c: SCSI dependant code for the DPT driver + * + * credits: Assisted by Mike Neuffer in the early low level DPT code + * Thanx to Mark Salyzyn of DPT for his assistance. + * Special thanx to Justin Gibbs for invaluable help in + * making this driver look and work like a FreeBSD component. + * Last but not least, many thanx to UCB and the FreeBSD + * team for creating and maintaining such a wonderful O/S. + * + * TODO: * Add ISA probe code. + * * Add driver-level RAID-0. This will allow interoperability with + * NiceTry, M$-Doze, Win-Dog, Slowlaris, etc., in recognizing RAID + * arrays that span controllers (Wow!). + */ + +#ident "$FreeBSD$" + +#define _DPT_C_ + +#include "opt_dpt.h" +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/eventhandler.h> +#include <sys/malloc.h> +#include <sys/kernel.h> + +#include <sys/bus.h> + +#include <machine/bus_memio.h> +#include <machine/bus_pio.h> +#include <machine/bus.h> + + +#include <cam/cam.h> +#include <cam/cam_ccb.h> +#include <cam/cam_sim.h> +#include <cam/cam_xpt_sim.h> +#include <cam/cam_debug.h> +#include <cam/scsi/scsi_all.h> +#include <cam/scsi/scsi_message.h> + +#include <vm/vm.h> +#include <vm/pmap.h> + +#include <dev/dpt/dpt.h> + +/* dpt_isa.c, dpt_eisa.c, and dpt_pci.c need this in a central place */ +int dpt_controllers_present; + +u_long dpt_unit; /* Next unit number to use */ + +/* The linked list of softc structures */ +struct dpt_softc_list dpt_softcs = TAILQ_HEAD_INITIALIZER(dpt_softcs); + +#define microtime_now dpt_time_now() + +#define dpt_inl(dpt, port) \ + bus_space_read_4((dpt)->tag, (dpt)->bsh, port) +#define dpt_inb(dpt, port) \ + bus_space_read_1((dpt)->tag, (dpt)->bsh, port) +#define dpt_outl(dpt, port, value) \ + bus_space_write_4((dpt)->tag, (dpt)->bsh, port, value) +#define dpt_outb(dpt, port, value) \ + bus_space_write_1((dpt)->tag, (dpt)->bsh, port, value) + +/* + * These will have to be setup by parameters passed at boot/load time. For + * perfromance reasons, we make them constants for the time being. + */ +#define dpt_min_segs DPT_MAX_SEGS +#define dpt_max_segs DPT_MAX_SEGS + +/* Definitions for our use of the SIM private CCB area */ +#define ccb_dccb_ptr spriv_ptr0 +#define ccb_dpt_ptr spriv_ptr1 + +/* ================= Private Inline Function declarations ===================*/ +static __inline int dpt_just_reset(dpt_softc_t * dpt); +static __inline int dpt_raid_busy(dpt_softc_t * dpt); +static __inline int dpt_pio_wait (u_int32_t, u_int, u_int, u_int); +static __inline int dpt_wait(dpt_softc_t *dpt, u_int bits, + u_int state); +static __inline struct dpt_ccb* dptgetccb(struct dpt_softc *dpt); +static __inline void dptfreeccb(struct dpt_softc *dpt, + struct dpt_ccb *dccb); +static __inline bus_addr_t dptccbvtop(struct dpt_softc *dpt, + struct dpt_ccb *dccb); + +static __inline int dpt_send_immediate(dpt_softc_t *dpt, + eata_ccb_t *cmd_block, + u_int32_t cmd_busaddr, + u_int retries, + u_int ifc, u_int code, + u_int code2); + +/* ==================== Private Function declarations =======================*/ +static void dptmapmem(void *arg, bus_dma_segment_t *segs, + int nseg, int error); + +static struct sg_map_node* + dptallocsgmap(struct dpt_softc *dpt); + +static int dptallocccbs(dpt_softc_t *dpt); + +static int dpt_get_conf(dpt_softc_t *dpt, dpt_ccb_t *dccb, + u_int32_t dccb_busaddr, u_int size, + u_int page, u_int target, int extent); +static void dpt_detect_cache(dpt_softc_t *dpt, dpt_ccb_t *dccb, + u_int32_t dccb_busaddr, + u_int8_t *buff); + +static void dpt_poll(struct cam_sim *sim); + +static void dptexecuteccb(void *arg, bus_dma_segment_t *dm_segs, + int nseg, int error); + +static void dpt_action(struct cam_sim *sim, union ccb *ccb); + +static int dpt_send_eata_command(dpt_softc_t *dpt, eata_ccb_t *cmd, + u_int32_t cmd_busaddr, + u_int command, u_int retries, + u_int ifc, u_int code, + u_int code2); +static void dptprocesserror(dpt_softc_t *dpt, dpt_ccb_t *dccb, + union ccb *ccb, u_int hba_stat, + u_int scsi_stat, u_int32_t resid); + +static void dpttimeout(void *arg); +static void dptshutdown(void *arg, int howto); + +/* ================= Private Inline Function definitions ====================*/ +static __inline int +dpt_just_reset(dpt_softc_t * dpt) +{ + if ((dpt_inb(dpt, 2) == 'D') + && (dpt_inb(dpt, 3) == 'P') + && (dpt_inb(dpt, 4) == 'T') + && (dpt_inb(dpt, 5) == 'H')) + return (1); + else + return (0); +} + +static __inline int +dpt_raid_busy(dpt_softc_t * dpt) +{ + if ((dpt_inb(dpt, 0) == 'D') + && (dpt_inb(dpt, 1) == 'P') + && (dpt_inb(dpt, 2) == 'T')) + return (1); + else + return (0); +} + +static __inline int +dpt_pio_wait (u_int32_t base, u_int reg, u_int bits, u_int state) +{ + int i; + u_int c; + + for (i = 0; i < 20000; i++) { /* wait 20ms for not busy */ + c = inb(base + reg) & bits; + if (!(c == state)) + return (0); + else + DELAY(50); + } + return (-1); +} + +static __inline int +dpt_wait(dpt_softc_t *dpt, u_int bits, u_int state) +{ + int i; + u_int c; + + for (i = 0; i < 20000; i++) { /* wait 20ms for not busy */ + c = dpt_inb(dpt, HA_RSTATUS) & bits; + if (c == state) + return (0); + else + DELAY(50); + } + return (-1); +} + +static __inline struct dpt_ccb* +dptgetccb(struct dpt_softc *dpt) +{ + struct dpt_ccb* dccb; + int s; + + s = splcam(); + if ((dccb = SLIST_FIRST(&dpt->free_dccb_list)) != NULL) { + SLIST_REMOVE_HEAD(&dpt->free_dccb_list, links); + dpt->free_dccbs--; + } else if (dpt->total_dccbs < dpt->max_dccbs) { + dptallocccbs(dpt); + dccb = SLIST_FIRST(&dpt->free_dccb_list); + if (dccb == NULL) + printf("dpt%d: Can't malloc DCCB\n", dpt->unit); + else { + SLIST_REMOVE_HEAD(&dpt->free_dccb_list, links); + dpt->free_dccbs--; + } + } + splx(s); + + return (dccb); +} + +static __inline void +dptfreeccb(struct dpt_softc *dpt, struct dpt_ccb *dccb) +{ + int s; + + s = splcam(); + if ((dccb->state & DCCB_ACTIVE) != 0) + LIST_REMOVE(&dccb->ccb->ccb_h, sim_links.le); + if ((dccb->state & DCCB_RELEASE_SIMQ) != 0) + dccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ; + else if (dpt->resource_shortage != 0 + && (dccb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) { + dccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ; + dpt->resource_shortage = FALSE; + } + dccb->state = DCCB_FREE; + SLIST_INSERT_HEAD(&dpt->free_dccb_list, dccb, links); + ++dpt->free_dccbs; + splx(s); +} + +static __inline bus_addr_t +dptccbvtop(struct dpt_softc *dpt, struct dpt_ccb *dccb) +{ + return (dpt->dpt_ccb_busbase + + (u_int32_t)((caddr_t)dccb - (caddr_t)dpt->dpt_dccbs)); +} + +static __inline struct dpt_ccb * +dptccbptov(struct dpt_softc *dpt, bus_addr_t busaddr) +{ + return (dpt->dpt_dccbs + + ((struct dpt_ccb *)busaddr + - (struct dpt_ccb *)dpt->dpt_ccb_busbase)); +} + +/* + * Send a command for immediate execution by the DPT + * See above function for IMPORTANT notes. + */ +static __inline int +dpt_send_immediate(dpt_softc_t *dpt, eata_ccb_t *cmd_block, + u_int32_t cmd_busaddr, u_int retries, + u_int ifc, u_int code, u_int code2) +{ + return (dpt_send_eata_command(dpt, cmd_block, cmd_busaddr, + EATA_CMD_IMMEDIATE, retries, ifc, + code, code2)); +} + + +/* ===================== Private Function definitions =======================*/ +static void +dptmapmem(void *arg, bus_dma_segment_t *segs, int nseg, int error) +{ + bus_addr_t *busaddrp; + + busaddrp = (bus_addr_t *)arg; + *busaddrp = segs->ds_addr; +} + +static struct sg_map_node * +dptallocsgmap(struct dpt_softc *dpt) +{ + struct sg_map_node *sg_map; + + sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT); + + if (sg_map == NULL) + return (NULL); + + /* Allocate S/G space for the next batch of CCBS */ + if (bus_dmamem_alloc(dpt->sg_dmat, (void **)&sg_map->sg_vaddr, + BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) { + free(sg_map, M_DEVBUF); + return (NULL); + } + + (void)bus_dmamap_load(dpt->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr, + PAGE_SIZE, dptmapmem, &sg_map->sg_physaddr, + /*flags*/0); + + SLIST_INSERT_HEAD(&dpt->sg_maps, sg_map, links); + + return (sg_map); +} + +/* + * Allocate another chunk of CCB's. Return count of entries added. + * Assumed to be called at splcam(). + */ +static int +dptallocccbs(dpt_softc_t *dpt) +{ + struct dpt_ccb *next_ccb; + struct sg_map_node *sg_map; + bus_addr_t physaddr; + dpt_sg_t *segs; + int newcount; + int i; + + next_ccb = &dpt->dpt_dccbs[dpt->total_dccbs]; + + if (next_ccb == dpt->dpt_dccbs) { + /* + * First time through. Re-use the S/G + * space we allocated for initialization + * CCBS. + */ + sg_map = SLIST_FIRST(&dpt->sg_maps); + } else { + sg_map = dptallocsgmap(dpt); + } + + if (sg_map == NULL) + return (0); + + segs = sg_map->sg_vaddr; + physaddr = sg_map->sg_physaddr; + + newcount = (PAGE_SIZE / (dpt->sgsize * sizeof(dpt_sg_t))); + for (i = 0; dpt->total_dccbs < dpt->max_dccbs && i < newcount; i++) { + int error; + + error = bus_dmamap_create(dpt->buffer_dmat, /*flags*/0, + &next_ccb->dmamap); + if (error != 0) + break; + next_ccb->sg_list = segs; + next_ccb->sg_busaddr = htonl(physaddr); + next_ccb->eata_ccb.cp_dataDMA = htonl(physaddr); + next_ccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr); + next_ccb->eata_ccb.cp_reqDMA = + htonl(dptccbvtop(dpt, next_ccb) + + offsetof(struct dpt_ccb, sense_data)); + next_ccb->eata_ccb.cp_busaddr = dpt->dpt_ccb_busend; + next_ccb->state = DCCB_FREE; + next_ccb->tag = dpt->total_dccbs; + SLIST_INSERT_HEAD(&dpt->free_dccb_list, next_ccb, links); + segs += dpt->sgsize; + physaddr += (dpt->sgsize * sizeof(dpt_sg_t)); + dpt->dpt_ccb_busend += sizeof(*next_ccb); + next_ccb++; + dpt->total_dccbs++; + } + return (i); +} + +dpt_conf_t * +dpt_pio_get_conf (u_int32_t base) +{ + static dpt_conf_t * conf; + u_int16_t * p; + int i; + + /* + * Allocate a dpt_conf_t + */ + if (!conf) { + conf = (dpt_conf_t *)malloc(sizeof(dpt_conf_t), + M_DEVBUF, M_NOWAIT); + } + + /* + * If we didn't get one then we probably won't ever get one. + */ + if (!conf) { + printf("dpt: unable to allocate dpt_conf_t\n"); + return (NULL); + } + + /* + * If we have one, clean it up. + */ + bzero(conf, sizeof(dpt_conf_t)); + + /* + * Reset the controller. + */ + outb((base + HA_WCOMMAND), EATA_CMD_RESET); + + /* + * Wait for the controller to become ready. + * For some reason there can be -no- delays after calling reset + * before we wait on ready status. + */ + if (dpt_pio_wait(base, HA_RSTATUS, HA_SBUSY, 0)) { + printf("dpt: timeout waiting for controller to become ready\n"); + return (NULL); + } + + if (dpt_pio_wait(base, HA_RAUXSTAT, HA_ABUSY, 0)) { + printf("dpt: timetout waiting for adapter ready.\n"); + return (NULL); + } + + /* + * Send the PIO_READ_CONFIG command. + */ + outb((base + HA_WCOMMAND), EATA_CMD_PIO_READ_CONFIG); + + /* + * Read the data into the struct. + */ + p = (u_int16_t *)conf; + for (i = 0; i < (sizeof(dpt_conf_t) / 2); i++) { + + if (dpt_pio_wait(base, HA_RSTATUS, HA_SDRQ, 0)) { + printf("dpt: timeout in data read.\n"); + return (NULL); + } + + (*p) = inw(base + HA_RDATA); + p++; + } + + if (inb(base + HA_RSTATUS) & HA_SERROR) { + printf("dpt: error reading configuration data.\n"); + return (NULL); + } + +#define BE_EATA_SIGNATURE 0x45415441 +#define LE_EATA_SIGNATURE 0x41544145 + + /* + * Test to see if we have a valid card. + */ + if ((conf->signature == BE_EATA_SIGNATURE) || + (conf->signature == LE_EATA_SIGNATURE)) { + + while (inb(base + HA_RSTATUS) & HA_SDRQ) { + inw(base + HA_RDATA); + } + + return (conf); + } + return (NULL); +} + +/* + * Read a configuration page into the supplied dpt_cont_t buffer. + */ +static int +dpt_get_conf(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr, + u_int size, u_int page, u_int target, int extent) +{ + eata_ccb_t *cp; + + u_int8_t status; + + int ndx; + int ospl; + int result; + + cp = &dccb->eata_ccb; + bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(*dpt->sp)); + + cp->Interpret = 1; + cp->DataIn = 1; + cp->Auto_Req_Sen = 1; + cp->reqlen = sizeof(struct scsi_sense_data); + + cp->cp_id = target; + cp->cp_LUN = 0; /* In the EATA packet */ + cp->cp_lun = 0; /* In the SCSI command */ + + cp->cp_scsi_cmd = INQUIRY; + cp->cp_len = size; + + cp->cp_extent = extent; + + cp->cp_page = page; + cp->cp_channel = 0; /* DNC, Interpret mode is set */ + cp->cp_identify = 1; + cp->cp_datalen = htonl(size); + + ospl = splcam(); + + /* + * This could be a simple for loop, but we suspected the compiler To + * have optimized it a bit too much. Wait for the controller to + * become ready + */ + while (((status = dpt_inb(dpt, HA_RSTATUS)) != (HA_SREADY | HA_SSC) + && (status != (HA_SREADY | HA_SSC | HA_SERROR)) + && (status != (HA_SDRDY | HA_SERROR | HA_SDRQ))) + || (dpt_wait(dpt, HA_SBUSY, 0))) { + + /* + * RAID Drives still Spinning up? (This should only occur if + * the DPT controller is in a NON PC (PCI?) platform). + */ + if (dpt_raid_busy(dpt)) { + printf("dpt%d WARNING: Get_conf() RSUS failed.\n", + dpt->unit); + splx(ospl); + return (0); + } + } + + DptStat_Reset_BUSY(dpt->sp); + + /* + * XXXX We might want to do something more clever than aborting at + * this point, like resetting (rebooting) the controller and trying + * again. + */ + if ((result = dpt_send_eata_command(dpt, cp, dccb_busaddr, + EATA_CMD_DMA_SEND_CP, + 10000, 0, 0, 0)) != 0) { + printf("dpt%d WARNING: Get_conf() failed (%d) to send " + "EATA_CMD_DMA_READ_CONFIG\n", + dpt->unit, result); + splx(ospl); + return (0); + } + /* Wait for two seconds for a response. This can be slow */ + for (ndx = 0; + (ndx < 20000) + && !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ); + ndx++) { + DELAY(50); + } + + /* Grab the status and clear interrupts */ + status = dpt_inb(dpt, HA_RSTATUS); + + splx(ospl); + + /* + * Check the status carefully. Return only if the + * command was successful. + */ + if (((status & HA_SERROR) == 0) + && (dpt->sp->hba_stat == 0) + && (dpt->sp->scsi_stat == 0) + && (dpt->sp->residue_len == 0)) + return (0); + + if (dpt->sp->scsi_stat == SCSI_STATUS_CHECK_COND) + return (0); + + return (1); +} + +/* Detect Cache parameters and size */ +static void +dpt_detect_cache(dpt_softc_t *dpt, dpt_ccb_t *dccb, u_int32_t dccb_busaddr, + u_int8_t *buff) +{ + eata_ccb_t *cp; + u_int8_t *param; + int bytes; + int result; + int ospl; + int ndx; + u_int8_t status; + + /* + * Default setting, for best perfromance.. + * This is what virtually all cards default to.. + */ + dpt->cache_type = DPT_CACHE_WRITEBACK; + dpt->cache_size = 0; + + cp = &dccb->eata_ccb; + bzero((void *)(uintptr_t)(volatile void *)dpt->sp, sizeof(dpt->sp)); + bzero(buff, 512); + + /* Setup the command structure */ + cp->Interpret = 1; + cp->DataIn = 1; + cp->Auto_Req_Sen = 1; + cp->reqlen = sizeof(struct scsi_sense_data); + + cp->cp_id = 0; /* who cares? The HBA will interpret.. */ + cp->cp_LUN = 0; /* In the EATA packet */ + cp->cp_lun = 0; /* In the SCSI command */ + cp->cp_channel = 0; + + cp->cp_scsi_cmd = EATA_CMD_DMA_SEND_CP; + cp->cp_len = 56; + + cp->cp_extent = 0; + cp->cp_page = 0; + cp->cp_identify = 1; + cp->cp_dispri = 1; + + /* + * Build the EATA Command Packet structure + * for a Log Sense Command. + */ + cp->cp_cdb[0] = 0x4d; + cp->cp_cdb[1] = 0x0; + cp->cp_cdb[2] = 0x40 | 0x33; + cp->cp_cdb[7] = 1; + + cp->cp_datalen = htonl(512); + + ospl = splcam(); + result = dpt_send_eata_command(dpt, cp, dccb_busaddr, + EATA_CMD_DMA_SEND_CP, + 10000, 0, 0, 0); + if (result != 0) { + printf("dpt%d WARNING: detect_cache() failed (%d) to send " + "EATA_CMD_DMA_SEND_CP\n", dpt->unit, result); + splx(ospl); + return; + } + /* Wait for two seconds for a response. This can be slow... */ + for (ndx = 0; + (ndx < 20000) && + !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ); + ndx++) { + DELAY(50); + } + + /* Grab the status and clear interrupts */ + status = dpt_inb(dpt, HA_RSTATUS); + splx(ospl); + + /* + * Sanity check + */ + if (buff[0] != 0x33) { + return; + } + bytes = DPT_HCP_LENGTH(buff); + param = DPT_HCP_FIRST(buff); + + if (DPT_HCP_CODE(param) != 1) { + /* + * DPT Log Page layout error + */ + printf("dpt%d: NOTICE: Log Page (1) layout error\n", + dpt->unit); + return; + } + if (!(param[4] & 0x4)) { + dpt->cache_type = DPT_NO_CACHE; + return; + } + while (DPT_HCP_CODE(param) != 6) { + param = DPT_HCP_NEXT(param); + if ((param < buff) + || (param >= &buff[bytes])) { + return; + } + } + + if (param[4] & 0x2) { + /* + * Cache disabled + */ + dpt->cache_type = DPT_NO_CACHE; + return; + } + + if (param[4] & 0x4) { + dpt->cache_type = DPT_CACHE_WRITETHROUGH; + } + + /* XXX This isn't correct. This log parameter only has two bytes.... */ +#if 0 + dpt->cache_size = param[5] + | (param[6] << 8) + | (param[7] << 16) + | (param[8] << 24); +#endif +} + +static void +dpt_poll(struct cam_sim *sim) +{ + dpt_intr(cam_sim_softc(sim)); +} + +static void +dptexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error) +{ + struct dpt_ccb *dccb; + union ccb *ccb; + struct dpt_softc *dpt; + int s; + + dccb = (struct dpt_ccb *)arg; + ccb = dccb->ccb; + dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr; + + if (error != 0) { + if (error != EFBIG) + printf("dpt%d: Unexepected error 0x%x returned from " + "bus_dmamap_load\n", dpt->unit, error); + if (ccb->ccb_h.status == CAM_REQ_INPROG) { + xpt_freeze_devq(ccb->ccb_h.path, /*count*/1); + ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN; + } + dptfreeccb(dpt, dccb); + xpt_done(ccb); + return; + } + + if (nseg != 0) { + dpt_sg_t *sg; + bus_dma_segment_t *end_seg; + bus_dmasync_op_t op; + + end_seg = dm_segs + nseg; + + /* Copy the segments into our SG list */ + sg = dccb->sg_list; + while (dm_segs < end_seg) { + sg->seg_len = htonl(dm_segs->ds_len); + sg->seg_addr = htonl(dm_segs->ds_addr); + sg++; + dm_segs++; + } + + if (nseg > 1) { + dccb->eata_ccb.scatter = 1; + dccb->eata_ccb.cp_dataDMA = dccb->sg_busaddr; + dccb->eata_ccb.cp_datalen = + htonl(nseg * sizeof(dpt_sg_t)); + } else { + dccb->eata_ccb.cp_dataDMA = dccb->sg_list[0].seg_addr; + dccb->eata_ccb.cp_datalen = dccb->sg_list[0].seg_len; + } + + if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) + op = BUS_DMASYNC_PREREAD; + else + op = BUS_DMASYNC_PREWRITE; + + bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op); + + } else { + dccb->eata_ccb.cp_dataDMA = 0; + dccb->eata_ccb.cp_datalen = 0; + } + + s = splcam(); + + /* + * Last time we need to check if this CCB needs to + * be aborted. + */ + if (ccb->ccb_h.status != CAM_REQ_INPROG) { + if (nseg != 0) + bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap); + dptfreeccb(dpt, dccb); + xpt_done(ccb); + splx(s); + return; + } + + dccb->state |= DCCB_ACTIVE; + ccb->ccb_h.status |= CAM_SIM_QUEUED; + LIST_INSERT_HEAD(&dpt->pending_ccb_list, &ccb->ccb_h, sim_links.le); + ccb->ccb_h.timeout_ch = + timeout(dpttimeout, (caddr_t)dccb, + (ccb->ccb_h.timeout * hz) / 1000); + if (dpt_send_eata_command(dpt, &dccb->eata_ccb, + dccb->eata_ccb.cp_busaddr, + EATA_CMD_DMA_SEND_CP, 0, 0, 0, 0) != 0) { + ccb->ccb_h.status = CAM_NO_HBA; /* HBA dead or just busy?? */ + if (nseg != 0) + bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap); + dptfreeccb(dpt, dccb); + xpt_done(ccb); + } + + splx(s); +} + +static void +dpt_action(struct cam_sim *sim, union ccb *ccb) +{ + struct dpt_softc *dpt; + + CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("dpt_action\n")); + + dpt = (struct dpt_softc *)cam_sim_softc(sim); + + if ((dpt->state & DPT_HA_SHUTDOWN_ACTIVE) != 0) { + xpt_print_path(ccb->ccb_h.path); + printf("controller is shutdown. Aborting CCB.\n"); + ccb->ccb_h.status = CAM_NO_HBA; + xpt_done(ccb); + return; + } + + switch (ccb->ccb_h.func_code) { + /* Common cases first */ + case XPT_SCSI_IO: /* Execute the requested I/O operation */ + { + struct ccb_scsiio *csio; + struct ccb_hdr *ccbh; + struct dpt_ccb *dccb; + struct eata_ccb *eccb; + + csio = &ccb->csio; + ccbh = &ccb->ccb_h; + /* Max CDB length is 12 bytes */ + if (csio->cdb_len > 12) { + ccb->ccb_h.status = CAM_REQ_INVALID; + xpt_done(ccb); + return; + } + if ((dccb = dptgetccb(dpt)) == NULL) { + int s; + + s = splcam(); + dpt->resource_shortage = 1; + splx(s); + xpt_freeze_simq(sim, /*count*/1); + ccb->ccb_h.status = CAM_REQUEUE_REQ; + xpt_done(ccb); + return; + } + eccb = &dccb->eata_ccb; + + /* Link dccb and ccb so we can find one from the other */ + dccb->ccb = ccb; + ccb->ccb_h.ccb_dccb_ptr = dccb; + ccb->ccb_h.ccb_dpt_ptr = dpt; + + /* + * Explicitly set all flags so that the compiler can + * be smart about setting them. + */ + eccb->SCSI_Reset = 0; + eccb->HBA_Init = 0; + eccb->Auto_Req_Sen = (ccb->ccb_h.flags & CAM_DIS_AUTOSENSE) + ? 0 : 1; + eccb->scatter = 0; + eccb->Quick = 0; + eccb->Interpret = + ccb->ccb_h.target_id == dpt->hostid[cam_sim_bus(sim)] + ? 1 : 0; + eccb->DataOut = (ccb->ccb_h.flags & CAM_DIR_OUT) ? 1 : 0; + eccb->DataIn = (ccb->ccb_h.flags & CAM_DIR_IN) ? 1 : 0; + eccb->reqlen = csio->sense_len; + eccb->cp_id = ccb->ccb_h.target_id; + eccb->cp_channel = cam_sim_bus(sim); + eccb->cp_LUN = ccb->ccb_h.target_lun; + eccb->cp_luntar = 0; + eccb->cp_dispri = (ccb->ccb_h.flags & CAM_DIS_DISCONNECT) + ? 0 : 1; + eccb->cp_identify = 1; + + if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0 + && csio->tag_action != CAM_TAG_ACTION_NONE) { + eccb->cp_msg[0] = csio->tag_action; + eccb->cp_msg[1] = dccb->tag; + } else { + eccb->cp_msg[0] = 0; + eccb->cp_msg[1] = 0; + } + eccb->cp_msg[2] = 0; + + if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) { + if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) { + bcopy(csio->cdb_io.cdb_ptr, + eccb->cp_cdb, csio->cdb_len); + } else { + /* I guess I could map it in... */ + ccb->ccb_h.status = CAM_REQ_INVALID; + dptfreeccb(dpt, dccb); + xpt_done(ccb); + return; + } + } else { + bcopy(csio->cdb_io.cdb_bytes, + eccb->cp_cdb, csio->cdb_len); + } + /* + * If we have any data to send with this command, + * map it into bus space. + */ + /* Only use S/G if there is a transfer */ + if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) { + if ((ccbh->flags & CAM_SCATTER_VALID) == 0) { + /* + * We've been given a pointer + * to a single buffer. + */ + if ((ccbh->flags & CAM_DATA_PHYS) == 0) { + int s; + int error; + + s = splsoftvm(); + error = + bus_dmamap_load(dpt->buffer_dmat, + dccb->dmamap, + csio->data_ptr, + csio->dxfer_len, + dptexecuteccb, + dccb, /*flags*/0); + if (error == EINPROGRESS) { + /* + * So as to maintain ordering, + * freeze the controller queue + * until our mapping is + * returned. + */ + xpt_freeze_simq(sim, 1); + dccb->state |= CAM_RELEASE_SIMQ; + } + splx(s); + } else { + struct bus_dma_segment seg; + + /* Pointer to physical buffer */ + seg.ds_addr = + (bus_addr_t)csio->data_ptr; + seg.ds_len = csio->dxfer_len; + dptexecuteccb(dccb, &seg, 1, 0); + } + } else { + struct bus_dma_segment *segs; + + if ((ccbh->flags & CAM_DATA_PHYS) != 0) + panic("dpt_action - Physical " + "segment pointers " + "unsupported"); + + if ((ccbh->flags&CAM_SG_LIST_PHYS)==0) + panic("dpt_action - Virtual " + "segment addresses " + "unsupported"); + + /* Just use the segments provided */ + segs = (struct bus_dma_segment *)csio->data_ptr; + dptexecuteccb(dccb, segs, csio->sglist_cnt, 0); + } + } else { + /* + * XXX JGibbs. + * Does it want them both on or both off? + * CAM_DIR_NONE is both on, so this code can + * be removed if this is also what the DPT + * exptects. + */ + eccb->DataOut = 0; + eccb->DataIn = 0; + dptexecuteccb(dccb, NULL, 0, 0); + } + break; + } + case XPT_RESET_DEV: /* Bus Device Reset the specified SCSI device */ + case XPT_ABORT: /* Abort the specified CCB */ + /* XXX Implement */ + ccb->ccb_h.status = CAM_REQ_INVALID; + xpt_done(ccb); + break; + case XPT_SET_TRAN_SETTINGS: + { + ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; + xpt_done(ccb); + break; + } + case XPT_GET_TRAN_SETTINGS: + /* Get default/user set transfer settings for the target */ + { + struct ccb_trans_settings *cts; + u_int target_mask; + + cts = &ccb->cts; + target_mask = 0x01 << ccb->ccb_h.target_id; + if ((cts->flags & CCB_TRANS_USER_SETTINGS) != 0) { + cts->flags = CCB_TRANS_DISC_ENB|CCB_TRANS_TAG_ENB; + cts->bus_width = (dpt->max_id > 7) + ? MSG_EXT_WDTR_BUS_8_BIT + : MSG_EXT_WDTR_BUS_16_BIT; + cts->sync_period = 25; /* 10MHz */ + + if (cts->sync_period != 0) + cts->sync_offset = 15; + + cts->valid = CCB_TRANS_SYNC_RATE_VALID + | CCB_TRANS_SYNC_OFFSET_VALID + | CCB_TRANS_BUS_WIDTH_VALID + | CCB_TRANS_DISC_VALID + | CCB_TRANS_TQ_VALID; + ccb->ccb_h.status = CAM_REQ_CMP; + } else { + ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; + } + xpt_done(ccb); + break; + } + case XPT_CALC_GEOMETRY: + { + struct ccb_calc_geometry *ccg; + u_int32_t size_mb; + u_int32_t secs_per_cylinder; + int extended; + + /* + * XXX Use Adaptec translation until I find out how to + * get this information from the card. + */ + ccg = &ccb->ccg; + size_mb = ccg->volume_size + / ((1024L * 1024L) / ccg->block_size); + extended = 1; + + if (size_mb > 1024 && extended) { + ccg->heads = 255; + ccg->secs_per_track = 63; + } else { + ccg->heads = 64; + ccg->secs_per_track = 32; + } + secs_per_cylinder = ccg->heads * ccg->secs_per_track; + ccg->cylinders = ccg->volume_size / secs_per_cylinder; + ccb->ccb_h.status = CAM_REQ_CMP; + xpt_done(ccb); + break; + } + case XPT_RESET_BUS: /* Reset the specified SCSI bus */ + { + /* XXX Implement */ + ccb->ccb_h.status = CAM_REQ_CMP; + xpt_done(ccb); + break; + } + case XPT_TERM_IO: /* Terminate the I/O process */ + /* XXX Implement */ + ccb->ccb_h.status = CAM_REQ_INVALID; + xpt_done(ccb); + break; + case XPT_PATH_INQ: /* Path routing inquiry */ + { + struct ccb_pathinq *cpi = &ccb->cpi; + + cpi->version_num = 1; + cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE; + if (dpt->max_id > 7) + cpi->hba_inquiry |= PI_WIDE_16; + cpi->target_sprt = 0; + cpi->hba_misc = 0; + cpi->hba_eng_cnt = 0; + cpi->max_target = dpt->max_id; + cpi->max_lun = dpt->max_lun; + cpi->initiator_id = dpt->hostid[cam_sim_bus(sim)]; + cpi->bus_id = cam_sim_bus(sim); + cpi->base_transfer_speed = 3300; + strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); + strncpy(cpi->hba_vid, "DPT", HBA_IDLEN); + strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); + cpi->unit_number = cam_sim_unit(sim); + cpi->ccb_h.status = CAM_REQ_CMP; + xpt_done(ccb); + break; + } + default: + ccb->ccb_h.status = CAM_REQ_INVALID; + xpt_done(ccb); + break; + } +} + +/* + * This routine will try to send an EATA command to the DPT HBA. + * It will, by default, try 20,000 times, waiting 50us between tries. + * It returns 0 on success and 1 on failure. + * It is assumed to be called at splcam(). + */ +static int +dpt_send_eata_command(dpt_softc_t *dpt, eata_ccb_t *cmd_block, + u_int32_t cmd_busaddr, u_int command, u_int retries, + u_int ifc, u_int code, u_int code2) +{ + u_int loop; + + if (!retries) + retries = 20000; + + /* + * I hate this polling nonsense. Wish there was a way to tell the DPT + * to go get commands at its own pace, or to interrupt when ready. + * In the mean time we will measure how many itterations it really + * takes. + */ + for (loop = 0; loop < retries; loop++) { + if ((dpt_inb(dpt, HA_RAUXSTAT) & HA_ABUSY) == 0) + break; + else + DELAY(50); + } + + if (loop < retries) { +#ifdef DPT_MEASURE_PERFORMANCE + if (loop > dpt->performance.max_eata_tries) + dpt->performance.max_eata_tries = loop; + + if (loop < dpt->performance.min_eata_tries) + dpt->performance.min_eata_tries = loop; +#endif + } else { +#ifdef DPT_MEASURE_PERFORMANCE + ++dpt->performance.command_too_busy; +#endif + return (1); + } + + /* The controller is alive, advance the wedge timer */ +#ifdef DPT_RESET_HBA + dpt->last_contact = microtime_now; +#endif + + if (cmd_block == NULL) + cmd_busaddr = 0; +#if (BYTE_ORDER == BIG_ENDIAN) + else { + cmd_busaddr = ((cmd_busaddr >> 24) & 0xFF) + | ((cmd_busaddr >> 16) & 0xFF) + | ((cmd_busaddr >> 8) & 0xFF) + | (cmd_busaddr & 0xFF); + } +#endif + /* And now the address */ + dpt_outl(dpt, HA_WDMAADDR, cmd_busaddr); + + if (command == EATA_CMD_IMMEDIATE) { + if (cmd_block == NULL) { + dpt_outb(dpt, HA_WCODE2, code2); + dpt_outb(dpt, HA_WCODE, code); + } + dpt_outb(dpt, HA_WIFC, ifc); + } + dpt_outb(dpt, HA_WCOMMAND, command); + + return (0); +} + + +/* ==================== Exported Function definitions =======================*/ +dpt_softc_t * +dpt_alloc(device_t dev, bus_space_tag_t tag, bus_space_handle_t bsh) +{ + dpt_softc_t *dpt = device_get_softc(dev); + int i; + + bzero(dpt, sizeof(dpt_softc_t)); + dpt->tag = tag; + dpt->bsh = bsh; + dpt->unit = device_get_unit(dev); + SLIST_INIT(&dpt->free_dccb_list); + LIST_INIT(&dpt->pending_ccb_list); + TAILQ_INSERT_TAIL(&dpt_softcs, dpt, links); + for (i = 0; i < MAX_CHANNELS; i++) + dpt->resetlevel[i] = DPT_HA_OK; + +#ifdef DPT_MEASURE_PERFORMANCE + dpt_reset_performance(dpt); +#endif /* DPT_MEASURE_PERFORMANCE */ + return (dpt); +} + +void +dpt_free(struct dpt_softc *dpt) +{ + switch (dpt->init_level) { + default: + case 5: + bus_dmamap_unload(dpt->dccb_dmat, dpt->dccb_dmamap); + case 4: + bus_dmamem_free(dpt->dccb_dmat, dpt->dpt_dccbs, + dpt->dccb_dmamap); + bus_dmamap_destroy(dpt->dccb_dmat, dpt->dccb_dmamap); + case 3: + bus_dma_tag_destroy(dpt->dccb_dmat); + case 2: + bus_dma_tag_destroy(dpt->buffer_dmat); + case 1: + { + struct sg_map_node *sg_map; + + while ((sg_map = SLIST_FIRST(&dpt->sg_maps)) != NULL) { + SLIST_REMOVE_HEAD(&dpt->sg_maps, links); + bus_dmamap_unload(dpt->sg_dmat, + sg_map->sg_dmamap); + bus_dmamem_free(dpt->sg_dmat, sg_map->sg_vaddr, + sg_map->sg_dmamap); + free(sg_map, M_DEVBUF); + } + bus_dma_tag_destroy(dpt->sg_dmat); + } + case 0: + break; + } + TAILQ_REMOVE(&dpt_softcs, dpt, links); +} + +static u_int8_t string_sizes[] = +{ + sizeof(((dpt_inq_t*)NULL)->vendor), + sizeof(((dpt_inq_t*)NULL)->modelNum), + sizeof(((dpt_inq_t*)NULL)->firmware), + sizeof(((dpt_inq_t*)NULL)->protocol), +}; + +int +dpt_init(struct dpt_softc *dpt) +{ + dpt_conf_t conf; + struct sg_map_node *sg_map; + dpt_ccb_t *dccb; + u_int8_t *strp; + int index; + int i; + int retval; + + dpt->init_level = 0; + SLIST_INIT(&dpt->sg_maps); + +#ifdef DPT_RESET_BOARD + printf("dpt%d: resetting HBA\n", dpt->unit); + dpt_outb(dpt, HA_WCOMMAND, EATA_CMD_RESET); + DELAY(750000); + /* XXX Shouldn't we poll a status register or something??? */ +#endif + /* DMA tag for our S/G structures. We allocate in page sized chunks */ + if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0, + /*lowaddr*/BUS_SPACE_MAXADDR, + /*highaddr*/BUS_SPACE_MAXADDR, + /*filter*/NULL, /*filterarg*/NULL, + PAGE_SIZE, /*nsegments*/1, + /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, + /*flags*/0, &dpt->sg_dmat) != 0) { + goto error_exit; + } + + dpt->init_level++; + + /* + * We allocate our DPT ccbs as a contiguous array of bus dma'able + * memory. To get the allocation size, we need to know how many + * ccbs the card supports. This requires a ccb. We solve this + * chicken and egg problem by allocating some re-usable S/G space + * up front, and treating it as our status packet, CCB, and target + * memory space for these commands. + */ + sg_map = dptallocsgmap(dpt); + if (sg_map == NULL) + goto error_exit; + + dpt->sp = (volatile dpt_sp_t *)sg_map->sg_vaddr; + dccb = (struct dpt_ccb *)(uintptr_t)(volatile void *)&dpt->sp[1]; + bzero(dccb, sizeof(*dccb)); + dpt->sp_physaddr = sg_map->sg_physaddr; + dccb->eata_ccb.cp_dataDMA = + htonl(sg_map->sg_physaddr + sizeof(dpt_sp_t) + sizeof(*dccb)); + dccb->eata_ccb.cp_busaddr = ~0; + dccb->eata_ccb.cp_statDMA = htonl(dpt->sp_physaddr); + dccb->eata_ccb.cp_reqDMA = htonl(dpt->sp_physaddr + sizeof(*dccb) + + offsetof(struct dpt_ccb, sense_data)); + + /* Okay. Fetch our config */ + bzero(&dccb[1], sizeof(conf)); /* data area */ + retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t), + sizeof(conf), 0xc1, 7, 1); + + if (retval != 0) { + printf("dpt%d: Failed to get board configuration\n", dpt->unit); + return (retval); + } + bcopy(&dccb[1], &conf, sizeof(conf)); + + bzero(&dccb[1], sizeof(dpt->board_data)); + retval = dpt_get_conf(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t), + sizeof(dpt->board_data), 0, conf.scsi_id0, 0); + if (retval != 0) { + printf("dpt%d: Failed to get inquiry information\n", dpt->unit); + return (retval); + } + bcopy(&dccb[1], &dpt->board_data, sizeof(dpt->board_data)); + + dpt_detect_cache(dpt, dccb, sg_map->sg_physaddr + sizeof(dpt_sp_t), + (u_int8_t *)&dccb[1]); + + switch (ntohl(conf.splen)) { + case DPT_EATA_REVA: + dpt->EATA_revision = 'a'; + break; + case DPT_EATA_REVB: + dpt->EATA_revision = 'b'; + break; + case DPT_EATA_REVC: + dpt->EATA_revision = 'c'; + break; + case DPT_EATA_REVZ: + dpt->EATA_revision = 'z'; + break; + default: + dpt->EATA_revision = '?'; + } + + dpt->max_id = conf.MAX_ID; + dpt->max_lun = conf.MAX_LUN; + dpt->irq = conf.IRQ; + dpt->dma_channel = (8 - conf.DMA_channel) & 7; + dpt->channels = conf.MAX_CHAN + 1; + dpt->state |= DPT_HA_OK; + if (conf.SECOND) + dpt->primary = FALSE; + else + dpt->primary = TRUE; + + dpt->more_support = conf.MORE_support; + + if (strncmp(dpt->board_data.firmware, "07G0", 4) >= 0) + dpt->immediate_support = 1; + else + dpt->immediate_support = 0; + + dpt->broken_INQUIRY = FALSE; + + dpt->cplen = ntohl(conf.cplen); + dpt->cppadlen = ntohs(conf.cppadlen); + dpt->max_dccbs = ntohs(conf.queuesiz); + + if (dpt->max_dccbs > 256) { + printf("dpt%d: Max CCBs reduced from %d to " + "256 due to tag algorithm\n", dpt->unit, dpt->max_dccbs); + dpt->max_dccbs = 256; + } + + dpt->hostid[0] = conf.scsi_id0; + dpt->hostid[1] = conf.scsi_id1; + dpt->hostid[2] = conf.scsi_id2; + + if (conf.SG_64K) + dpt->sgsize = 8192; + else + dpt->sgsize = ntohs(conf.SGsiz); + + /* We can only get 64k buffers, so don't bother to waste space. */ + if (dpt->sgsize < 17 || dpt->sgsize > 32) + dpt->sgsize = 32; + + if (dpt->sgsize > dpt_max_segs) + dpt->sgsize = dpt_max_segs; + + /* DMA tag for mapping buffers into device visible space. */ + if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0, + /*lowaddr*/BUS_SPACE_MAXADDR, + /*highaddr*/BUS_SPACE_MAXADDR, + /*filter*/NULL, /*filterarg*/NULL, + /*maxsize*/MAXBSIZE, /*nsegments*/dpt->sgsize, + /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, + /*flags*/BUS_DMA_ALLOCNOW, + &dpt->buffer_dmat) != 0) { + printf("dpt: bus_dma_tag_create(...,dpt->buffer_dmat) failed\n"); + goto error_exit; + } + + dpt->init_level++; + + /* DMA tag for our ccb structures and interrupt status packet */ + if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0, + /*lowaddr*/BUS_SPACE_MAXADDR, + /*highaddr*/BUS_SPACE_MAXADDR, + /*filter*/NULL, /*filterarg*/NULL, + (dpt->max_dccbs * sizeof(struct dpt_ccb)) + + sizeof(dpt_sp_t), + /*nsegments*/1, + /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, + /*flags*/0, &dpt->dccb_dmat) != 0) { + printf("dpt: bus_dma_tag_create(...,dpt->dccb_dmat) failed\n"); + goto error_exit; + } + + dpt->init_level++; + + /* Allocation for our ccbs and interrupt status packet */ + if (bus_dmamem_alloc(dpt->dccb_dmat, (void **)&dpt->dpt_dccbs, + BUS_DMA_NOWAIT, &dpt->dccb_dmamap) != 0) { + printf("dpt: bus_dmamem_alloc(dpt->dccb_dmat,...) failed\n"); + goto error_exit; + } + + dpt->init_level++; + + /* And permanently map them */ + bus_dmamap_load(dpt->dccb_dmat, dpt->dccb_dmamap, + dpt->dpt_dccbs, + (dpt->max_dccbs * sizeof(struct dpt_ccb)) + + sizeof(dpt_sp_t), + dptmapmem, &dpt->dpt_ccb_busbase, /*flags*/0); + + /* Clear them out. */ + bzero(dpt->dpt_dccbs, + (dpt->max_dccbs * sizeof(struct dpt_ccb)) + sizeof(dpt_sp_t)); + + dpt->dpt_ccb_busend = dpt->dpt_ccb_busbase; + + dpt->sp = (dpt_sp_t*)&dpt->dpt_dccbs[dpt->max_dccbs]; + dpt->sp_physaddr = dpt->dpt_ccb_busbase + + (dpt->max_dccbs * sizeof(dpt_ccb_t)); + dpt->init_level++; + + /* Allocate our first batch of ccbs */ + if (dptallocccbs(dpt) == 0) { + printf("dpt: dptallocccbs(dpt) == 0\n"); + return (2); + } + + /* Prepare for Target Mode */ + dpt->target_mode_enabled = 1; + + /* Nuke excess spaces from inquiry information */ + strp = dpt->board_data.vendor; + for (i = 0; i < sizeof(string_sizes); i++) { + index = string_sizes[i] - 1; + while (index && (strp[index] == ' ')) + strp[index--] = '\0'; + strp += string_sizes[i]; + } + + printf("dpt%d: %.8s %.16s FW Rev. %.4s, ", + dpt->unit, dpt->board_data.vendor, + dpt->board_data.modelNum, dpt->board_data.firmware); + + printf("%d channel%s, ", dpt->channels, dpt->channels > 1 ? "s" : ""); + + if (dpt->cache_type != DPT_NO_CACHE + && dpt->cache_size != 0) { + printf("%s Cache, ", + dpt->cache_type == DPT_CACHE_WRITETHROUGH + ? "Write-Through" : "Write-Back"); + } + + printf("%d CCBs\n", dpt->max_dccbs); + return (0); + +error_exit: + return (1); +} + +int +dpt_attach(dpt_softc_t *dpt) +{ + struct cam_devq *devq; + int i; + + /* + * Create the device queue for our SIM. + */ + devq = cam_simq_alloc(dpt->max_dccbs); + if (devq == NULL) + return (0); + + for (i = 0; i < dpt->channels; i++) { + /* + * Construct our SIM entry + */ + dpt->sims[i] = cam_sim_alloc(dpt_action, dpt_poll, "dpt", + dpt, dpt->unit, /*untagged*/2, + /*tagged*/dpt->max_dccbs, devq); + if (xpt_bus_register(dpt->sims[i], i) != CAM_SUCCESS) { + cam_sim_free(dpt->sims[i], /*free_devq*/i == 0); + break; + } + + if (xpt_create_path(&dpt->paths[i], /*periph*/NULL, + cam_sim_path(dpt->sims[i]), + CAM_TARGET_WILDCARD, + CAM_LUN_WILDCARD) != CAM_REQ_CMP) { + xpt_bus_deregister(cam_sim_path(dpt->sims[i])); + cam_sim_free(dpt->sims[i], /*free_devq*/i == 0); + break; + } + + } + if (i > 0) + EVENTHANDLER_REGISTER(shutdown_final, dptshutdown, + dpt, SHUTDOWN_PRI_DEFAULT); + return (i); +} + + +/* + * This is the interrupt handler for the DPT driver. + */ +void +dpt_intr(void *arg) +{ + dpt_softc_t *dpt; + dpt_ccb_t *dccb; + union ccb *ccb; + u_int status; + u_int aux_status; + u_int hba_stat; + u_int scsi_stat; + u_int32_t residue_len; /* Number of bytes not transferred */ + + dpt = (dpt_softc_t *)arg; + + /* First order of business is to check if this interrupt is for us */ + while (((aux_status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ) != 0) { + + /* + * What we want to do now, is to capture the status, all of it, + * move it where it belongs, wake up whoever sleeps waiting to + * process this result, and get out of here. + */ + if (dpt->sp->ccb_busaddr < dpt->dpt_ccb_busbase + || dpt->sp->ccb_busaddr >= dpt->dpt_ccb_busend) { + printf("Encountered bogus status packet\n"); + status = dpt_inb(dpt, HA_RSTATUS); + return; + } + + dccb = dptccbptov(dpt, dpt->sp->ccb_busaddr); + + dpt->sp->ccb_busaddr = ~0; + + /* Ignore status packets with EOC not set */ + if (dpt->sp->EOC == 0) { + printf("dpt%d ERROR: Request %d recieved with " + "clear EOC.\n Marking as LOST.\n", + dpt->unit, dccb->transaction_id); + +#ifdef DPT_HANDLE_TIMEOUTS + dccb->state |= DPT_CCB_STATE_MARKED_LOST; +#endif + /* This CLEARS the interrupt! */ + status = dpt_inb(dpt, HA_RSTATUS); + continue; + } + dpt->sp->EOC = 0; + + /* + * Double buffer the status information so the hardware can + * work on updating the status packet while we decifer the + * one we were just interrupted for. + * According to Mark Salyzyn, we only need few pieces of it. + */ + hba_stat = dpt->sp->hba_stat; + scsi_stat = dpt->sp->scsi_stat; + residue_len = dpt->sp->residue_len; + + /* Clear interrupts, check for error */ + if ((status = dpt_inb(dpt, HA_RSTATUS)) & HA_SERROR) { + /* + * Error Condition. Check for magic cookie. Exit + * this test on earliest sign of non-reset condition + */ + + /* Check that this is not a board reset interrupt */ + if (dpt_just_reset(dpt)) { + printf("dpt%d: HBA rebooted.\n" + " All transactions should be " + "resubmitted\n", + dpt->unit); + + printf("dpt%d: >>---->> This is incomplete, " + "fix me.... <<----<<", dpt->unit); + panic("DPT Rebooted"); + + } + } + /* Process CCB */ + ccb = dccb->ccb; + untimeout(dpttimeout, dccb, ccb->ccb_h.timeout_ch); + if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) { + bus_dmasync_op_t op; + + if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) + op = BUS_DMASYNC_POSTREAD; + else + op = BUS_DMASYNC_POSTWRITE; + bus_dmamap_sync(dpt->buffer_dmat, dccb->dmamap, op); + bus_dmamap_unload(dpt->buffer_dmat, dccb->dmamap); + } + + /* Common Case inline... */ + if (hba_stat == HA_NO_ERROR) { + ccb->csio.scsi_status = scsi_stat; + ccb->ccb_h.status = 0; + switch (scsi_stat) { + case SCSI_STATUS_OK: + ccb->ccb_h.status |= CAM_REQ_CMP; + break; + case SCSI_STATUS_CHECK_COND: + case SCSI_STATUS_CMD_TERMINATED: + bcopy(&dccb->sense_data, &ccb->csio.sense_data, + ccb->csio.sense_len); + ccb->ccb_h.status |= CAM_AUTOSNS_VALID; + /* FALLTHROUGH */ + default: + ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR; + /* XXX Freeze DevQ */ + break; + } + ccb->csio.resid = residue_len; + dptfreeccb(dpt, dccb); + xpt_done(ccb); + } else { + dptprocesserror(dpt, dccb, ccb, hba_stat, scsi_stat, + residue_len); + } + } +} + +static void +dptprocesserror(dpt_softc_t *dpt, dpt_ccb_t *dccb, union ccb *ccb, + u_int hba_stat, u_int scsi_stat, u_int32_t resid) +{ + ccb->csio.resid = resid; + switch (hba_stat) { + case HA_ERR_SEL_TO: + ccb->ccb_h.status = CAM_SEL_TIMEOUT; + break; + case HA_ERR_CMD_TO: + ccb->ccb_h.status = CAM_CMD_TIMEOUT; + break; + case HA_SCSIBUS_RESET: + case HA_HBA_POWER_UP: /* Similar effect to a bus reset??? */ + ccb->ccb_h.status = CAM_SCSI_BUS_RESET; + break; + case HA_CP_ABORTED: + case HA_CP_RESET: /* XXX ??? */ + case HA_CP_ABORT_NA: /* XXX ??? */ + case HA_CP_RESET_NA: /* XXX ??? */ + if ((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_INPROG) + ccb->ccb_h.status = CAM_REQ_ABORTED; + break; + case HA_PCI_PARITY: + case HA_PCI_MABORT: + case HA_PCI_TABORT: + case HA_PCI_STABORT: + case HA_BUS_PARITY: + case HA_PARITY_ERR: + case HA_ECC_ERR: + ccb->ccb_h.status = CAM_UNCOR_PARITY; + break; + case HA_UNX_MSGRJCT: + ccb->ccb_h.status = CAM_MSG_REJECT_REC; + break; + case HA_UNX_BUSPHASE: + ccb->ccb_h.status = CAM_SEQUENCE_FAIL; + break; + case HA_UNX_BUS_FREE: + ccb->ccb_h.status = CAM_UNEXP_BUSFREE; + break; + case HA_SCSI_HUNG: + case HA_RESET_STUCK: + /* + * Dead??? Can the controller get unstuck + * from these conditions + */ + ccb->ccb_h.status = CAM_NO_HBA; + break; + case HA_RSENSE_FAIL: + ccb->ccb_h.status = CAM_AUTOSENSE_FAIL; + break; + default: + printf("dpt%d: Undocumented Error %x\n", dpt->unit, hba_stat); + printf("Please mail this message to shimon@simon-shapiro.org\n"); + ccb->ccb_h.status = CAM_REQ_CMP_ERR; + break; + } + dptfreeccb(dpt, dccb); + xpt_done(ccb); +} + +static void +dpttimeout(void *arg) +{ + struct dpt_ccb *dccb; + union ccb *ccb; + struct dpt_softc *dpt; + int s; + + dccb = (struct dpt_ccb *)arg; + ccb = dccb->ccb; + dpt = (struct dpt_softc *)ccb->ccb_h.ccb_dpt_ptr; + xpt_print_path(ccb->ccb_h.path); + printf("CCB %p - timed out\n", (void *)dccb); + + s = splcam(); + + /* + * Try to clear any pending jobs. FreeBSD will loose interrupts, + * leaving the controller suspended, and commands timed-out. + * By calling the interrupt handler, any command thus stuck will be + * completed. + */ + dpt_intr(dpt); + + if ((dccb->state & DCCB_ACTIVE) == 0) { + xpt_print_path(ccb->ccb_h.path); + printf("CCB %p - timed out CCB already completed\n", + (void *)dccb); + splx(s); + return; + } + + /* Abort this particular command. Leave all others running */ + dpt_send_immediate(dpt, &dccb->eata_ccb, dccb->eata_ccb.cp_busaddr, + /*retries*/20000, EATA_SPECIFIC_ABORT, 0, 0); + ccb->ccb_h.status = CAM_CMD_TIMEOUT; + splx(s); +} + +/* + * Shutdown the controller and ensure that the cache is completely flushed. + * Called from the shutdown_final event after all disk access has completed. + */ +static void +dptshutdown(void *arg, int howto) +{ + dpt_softc_t *dpt; + + dpt = (dpt_softc_t *)arg; + + printf("dpt%d: Shutting down (mode %x) HBA. Please wait...\n", + dpt->unit, howto); + + /* + * What we do for a shutdown, is give the DPT early power loss warning + */ + dpt_send_immediate(dpt, NULL, 0, EATA_POWER_OFF_WARN, 0, 0, 0); + DELAY(1000 * 1000 * 5); + printf("dpt%d: Controller was warned of shutdown and is now " + "disabled\n", dpt->unit); +} + +/*============================================================================*/ + +#if 0 +#ifdef DPT_RESET_HBA + +/* +** Function name : dpt_reset_hba +** +** Description : Reset the HBA and properly discard all pending work +** Input : Softc +** Output : Nothing +*/ +static void +dpt_reset_hba(dpt_softc_t *dpt) +{ + eata_ccb_t *ccb; + int ospl; + dpt_ccb_t dccb, *dccbp; + int result; + struct scsi_xfer *xs; + + /* Prepare a control block. The SCSI command part is immaterial */ + dccb.xs = NULL; + dccb.flags = 0; + dccb.state = DPT_CCB_STATE_NEW; + dccb.std_callback = NULL; + dccb.wrbuff_callback = NULL; + + ccb = &dccb.eata_ccb; + ccb->CP_OpCode = EATA_CMD_RESET; + ccb->SCSI_Reset = 0; + ccb->HBA_Init = 1; + ccb->Auto_Req_Sen = 1; + ccb->cp_id = 0; /* Should be ignored */ + ccb->DataIn = 1; + ccb->DataOut = 0; + ccb->Interpret = 1; + ccb->reqlen = htonl(sizeof(struct scsi_sense_data)); + ccb->cp_statDMA = htonl(vtophys(&ccb->cp_statDMA)); + ccb->cp_reqDMA = htonl(vtophys(&ccb->cp_reqDMA)); + ccb->cp_viraddr = (u_int32_t) & ccb; + + ccb->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO; + ccb->cp_scsi_cmd = 0; /* Should be ignored */ + + /* Lock up the submitted queue. We are very persistant here */ + ospl = splcam(); + while (dpt->queue_status & DPT_SUBMITTED_QUEUE_ACTIVE) { + DELAY(100); + } + + dpt->queue_status |= DPT_SUBMITTED_QUEUE_ACTIVE; + splx(ospl); + + /* Send the RESET message */ + if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb, + EATA_CMD_RESET, 0, 0, 0, 0)) != 0) { + printf("dpt%d: Failed to send the RESET message.\n" + " Trying cold boot (ouch!)\n", dpt->unit); + + + if ((result = dpt_send_eata_command(dpt, &dccb.eata_ccb, + EATA_COLD_BOOT, 0, 0, + 0, 0)) != 0) { + panic("dpt%d: Faild to cold boot the HBA\n", + dpt->unit); + } +#ifdef DPT_MEASURE_PERFORMANCE + dpt->performance.cold_boots++; +#endif /* DPT_MEASURE_PERFORMANCE */ + } + +#ifdef DPT_MEASURE_PERFORMANCE + dpt->performance.warm_starts++; +#endif /* DPT_MEASURE_PERFORMANCE */ + + printf("dpt%d: Aborting pending requests. O/S should re-submit\n", + dpt->unit); + + while ((dccbp = TAILQ_FIRST(&dpt->completed_ccbs)) != NULL) { + struct scsi_xfer *xs = dccbp->xs; + + /* Not all transactions have xs structs */ + if (xs != NULL) { + /* Tell the kernel proper this did not complete well */ + xs->error |= XS_SELTIMEOUT; + xs->flags |= SCSI_ITSDONE; + scsi_done(xs); + } + + dpt_Qremove_submitted(dpt, dccbp); + + /* Remember, Callbacks are NOT in the standard queue */ + if (dccbp->std_callback != NULL) { + (dccbp->std_callback)(dpt, dccbp->eata_ccb.cp_channel, + dccbp); + } else { + ospl = splcam(); + dpt_Qpush_free(dpt, dccbp); + splx(ospl); + } + } + + printf("dpt%d: reset done aborting all pending commands\n", dpt->unit); + dpt->queue_status &= ~DPT_SUBMITTED_QUEUE_ACTIVE; +} + +#endif /* DPT_RESET_HBA */ + +/* + * Build a Command Block for target mode READ/WRITE BUFFER, + * with the ``sync'' bit ON. + * + * Although the length and offset are 24 bit fields in the command, they cannot + * exceed 8192 bytes, so we take them as short integers andcheck their range. + * If they are sensless, we round them to zero offset, maximum length and + * complain. + */ + +static void +dpt_target_ccb(dpt_softc_t * dpt, int bus, u_int8_t target, u_int8_t lun, + dpt_ccb_t * ccb, int mode, u_int8_t command, + u_int16_t length, u_int16_t offset) +{ + eata_ccb_t *cp; + int ospl; + + if ((length + offset) > DPT_MAX_TARGET_MODE_BUFFER_SIZE) { + printf("dpt%d: Length of %d, and offset of %d are wrong\n", + dpt->unit, length, offset); + length = DPT_MAX_TARGET_MODE_BUFFER_SIZE; + offset = 0; + } + ccb->xs = NULL; + ccb->flags = 0; + ccb->state = DPT_CCB_STATE_NEW; + ccb->std_callback = (ccb_callback) dpt_target_done; + ccb->wrbuff_callback = NULL; + + cp = &ccb->eata_ccb; + cp->CP_OpCode = EATA_CMD_DMA_SEND_CP; + cp->SCSI_Reset = 0; + cp->HBA_Init = 0; + cp->Auto_Req_Sen = 1; + cp->cp_id = target; + cp->DataIn = 1; + cp->DataOut = 0; + cp->Interpret = 0; + cp->reqlen = htonl(sizeof(struct scsi_sense_data)); + cp->cp_statDMA = htonl(vtophys(&cp->cp_statDMA)); + cp->cp_reqDMA = htonl(vtophys(&cp->cp_reqDMA)); + cp->cp_viraddr = (u_int32_t) & ccb; + + cp->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO; + + cp->cp_scsi_cmd = command; + cp->cp_cdb[1] = (u_int8_t) (mode & SCSI_TM_MODE_MASK); + cp->cp_lun = lun; /* Order is important here! */ + cp->cp_cdb[2] = 0x00; /* Buffer Id, only 1 :-( */ + cp->cp_cdb[3] = (length >> 16) & 0xFF; /* Buffer offset MSB */ + cp->cp_cdb[4] = (length >> 8) & 0xFF; + cp->cp_cdb[5] = length & 0xFF; + cp->cp_cdb[6] = (length >> 16) & 0xFF; /* Length MSB */ + cp->cp_cdb[7] = (length >> 8) & 0xFF; + cp->cp_cdb[8] = length & 0xFF; /* Length LSB */ + cp->cp_cdb[9] = 0; /* No sync, no match bits */ + + /* + * This could be optimized to live in dpt_register_buffer. + * We keep it here, just in case the kernel decides to reallocate pages + */ + if (dpt_scatter_gather(dpt, ccb, DPT_RW_BUFFER_SIZE, + dpt->rw_buffer[bus][target][lun])) { + printf("dpt%d: Failed to setup Scatter/Gather for " + "Target-Mode buffer\n", dpt->unit); + } +} + +/* Setup a target mode READ command */ + +static void +dpt_set_target(int redo, dpt_softc_t * dpt, + u_int8_t bus, u_int8_t target, u_int8_t lun, int mode, + u_int16_t length, u_int16_t offset, dpt_ccb_t * ccb) +{ + int ospl; + + if (dpt->target_mode_enabled) { + ospl = splcam(); + + if (!redo) + dpt_target_ccb(dpt, bus, target, lun, ccb, mode, + SCSI_TM_READ_BUFFER, length, offset); + + ccb->transaction_id = ++dpt->commands_processed; + +#ifdef DPT_MEASURE_PERFORMANCE + dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++; + ccb->command_started = microtime_now; +#endif + dpt_Qadd_waiting(dpt, ccb); + dpt_sched_queue(dpt); + + splx(ospl); + } else { + printf("dpt%d: Target Mode Request, but Target Mode is OFF\n", + dpt->unit); + } +} + +/* + * Schedule a buffer to be sent to another target. + * The work will be scheduled and the callback provided will be called when + * the work is actually done. + * + * Please NOTE: ``Anyone'' can send a buffer, but only registered clients + * get notified of receipt of buffers. + */ + +int +dpt_send_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun, + u_int8_t mode, u_int16_t length, u_int16_t offset, void *data, + buff_wr_done callback) +{ + dpt_softc_t *dpt; + dpt_ccb_t *ccb = NULL; + int ospl; + + /* This is an external call. Be a bit paranoid */ + for (dpt = TAILQ_FIRST(&dpt_softc_list); + dpt != NULL; + dpt = TAILQ_NEXT(dpt, links)) { + if (dpt->unit == unit) + goto valid_unit; + } + + return (INVALID_UNIT); + +valid_unit: + + if (dpt->target_mode_enabled) { + if ((channel >= dpt->channels) || (target > dpt->max_id) || + (lun > dpt->max_lun)) { + return (INVALID_SENDER); + } + if ((dpt->rw_buffer[channel][target][lun] == NULL) || + (dpt->buffer_receiver[channel][target][lun] == NULL)) + return (NOT_REGISTERED); + + ospl = splsoftcam(); + /* Process the free list */ + if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) { + printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n" + " Please try later\n", + dpt->unit); + splx(ospl); + return (NO_RESOURCES); + } + /* Now grab the newest CCB */ + if ((ccb = dpt_Qpop_free(dpt)) == NULL) { + splx(ospl); + panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit); + } + splx(ospl); + + bcopy(dpt->rw_buffer[channel][target][lun] + offset, data, length); + dpt_target_ccb(dpt, channel, target, lun, ccb, mode, + SCSI_TM_WRITE_BUFFER, + length, offset); + ccb->std_callback = (ccb_callback) callback; /* Potential trouble */ + + ospl = splcam(); + ccb->transaction_id = ++dpt->commands_processed; + +#ifdef DPT_MEASURE_PERFORMANCE + dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]++; + ccb->command_started = microtime_now; +#endif + dpt_Qadd_waiting(dpt, ccb); + dpt_sched_queue(dpt); + + splx(ospl); + return (0); + } + return (DRIVER_DOWN); +} + +static void +dpt_target_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb) +{ + int ospl; + eata_ccb_t *cp; + + cp = &ccb->eata_ccb; + + /* + * Remove the CCB from the waiting queue. + * We do NOT put it back on the free, etc., queues as it is a special + * ccb, owned by the dpt_softc of this unit. + */ + ospl = splsoftcam(); + dpt_Qremove_completed(dpt, ccb); + splx(ospl); + +#define br_channel (ccb->eata_ccb.cp_channel) +#define br_target (ccb->eata_ccb.cp_id) +#define br_lun (ccb->eata_ccb.cp_LUN) +#define br_index [br_channel][br_target][br_lun] +#define read_buffer_callback (dpt->buffer_receiver br_index ) +#define read_buffer (dpt->rw_buffer[br_channel][br_target][br_lun]) +#define cb(offset) (ccb->eata_ccb.cp_cdb[offset]) +#define br_offset ((cb(3) << 16) | (cb(4) << 8) | cb(5)) +#define br_length ((cb(6) << 16) | (cb(7) << 8) | cb(8)) + + /* Different reasons for being here, you know... */ + switch (ccb->eata_ccb.cp_scsi_cmd) { + case SCSI_TM_READ_BUFFER: + if (read_buffer_callback != NULL) { + /* This is a buffer generated by a kernel process */ + read_buffer_callback(dpt->unit, br_channel, + br_target, br_lun, + read_buffer, + br_offset, br_length); + } else { + /* + * This is a buffer waited for by a user (sleeping) + * command + */ + wakeup(ccb); + } + + /* We ALWAYS re-issue the same command; args are don't-care */ + dpt_set_target(1, 0, 0, 0, 0, 0, 0, 0, 0); + break; + + case SCSI_TM_WRITE_BUFFER: + (ccb->wrbuff_callback) (dpt->unit, br_channel, br_target, + br_offset, br_length, + br_lun, ccb->status_packet.hba_stat); + break; + default: + printf("dpt%d: %s is an unsupported command for target mode\n", + dpt->unit, scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd)); + } + ospl = splsoftcam(); + dpt->target_ccb[br_channel][br_target][br_lun] = NULL; + dpt_Qpush_free(dpt, ccb); + splx(ospl); +} + + +/* + * Use this function to register a client for a buffer read target operation. + * The function you register will be called every time a buffer is received + * by the target mode code. + */ +dpt_rb_t +dpt_register_buffer(int unit, u_int8_t channel, u_int8_t target, u_int8_t lun, + u_int8_t mode, u_int16_t length, u_int16_t offset, + dpt_rec_buff callback, dpt_rb_op_t op) +{ + dpt_softc_t *dpt; + dpt_ccb_t *ccb = NULL; + int ospl; + + for (dpt = TAILQ_FIRST(&dpt_softc_list); + dpt != NULL; + dpt = TAILQ_NEXT(dpt, links)) { + if (dpt->unit == unit) + goto valid_unit; + } + + return (INVALID_UNIT); + +valid_unit: + + if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE) + return (DRIVER_DOWN); + + if ((channel > (dpt->channels - 1)) || (target > (dpt->max_id - 1)) || + (lun > (dpt->max_lun - 1))) + return (INVALID_SENDER); + + if (dpt->buffer_receiver[channel][target][lun] == NULL) { + if (op == REGISTER_BUFFER) { + /* Assign the requested callback */ + dpt->buffer_receiver[channel][target][lun] = callback; + /* Get a CCB */ + ospl = splsoftcam(); + + /* Process the free list */ + if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) { + printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n" + " Please try later\n", + dpt->unit); + splx(ospl); + return (NO_RESOURCES); + } + /* Now grab the newest CCB */ + if ((ccb = dpt_Qpop_free(dpt)) == NULL) { + splx(ospl); + panic("dpt%d: Got a NULL CCB from pop_free()\n", + dpt->unit); + } + splx(ospl); + + /* Clean up the leftover of the previous tenant */ + ccb->status = DPT_CCB_STATE_NEW; + dpt->target_ccb[channel][target][lun] = ccb; + + dpt->rw_buffer[channel][target][lun] = + malloc(DPT_RW_BUFFER_SIZE, M_DEVBUF, M_NOWAIT); + if (dpt->rw_buffer[channel][target][lun] == NULL) { + printf("dpt%d: Failed to allocate " + "Target-Mode buffer\n", dpt->unit); + ospl = splsoftcam(); + dpt_Qpush_free(dpt, ccb); + splx(ospl); + return (NO_RESOURCES); + } + dpt_set_target(0, dpt, channel, target, lun, mode, + length, offset, ccb); + return (SUCCESSFULLY_REGISTERED); + } else + return (NOT_REGISTERED); + } else { + if (op == REGISTER_BUFFER) { + if (dpt->buffer_receiver[channel][target][lun] == callback) + return (ALREADY_REGISTERED); + else + return (REGISTERED_TO_ANOTHER); + } else { + if (dpt->buffer_receiver[channel][target][lun] == callback) { + dpt->buffer_receiver[channel][target][lun] = NULL; + ospl = splsoftcam(); + dpt_Qpush_free(dpt, ccb); + splx(ospl); + free(dpt->rw_buffer[channel][target][lun], M_DEVBUF); + return (SUCCESSFULLY_REGISTERED); + } else + return (INVALID_CALLBACK); + } + + } +} + +/* Return the state of the blinking DPT LED's */ +u_int8_t +dpt_blinking_led(dpt_softc_t * dpt) +{ + int ndx; + int ospl; + u_int32_t state; + u_int32_t previous; + u_int8_t result; + + ospl = splcam(); + + result = 0; + + for (ndx = 0, state = 0, previous = 0; + (ndx < 10) && (state != previous); + ndx++) { + previous = state; + state = dpt_inl(dpt, 1); + } + + if ((state == previous) && (state == DPT_BLINK_INDICATOR)) + result = dpt_inb(dpt, 5); + + splx(ospl); + return (result); +} + +/* + * Execute a command which did not come from the kernel's SCSI layer. + * The only way to map user commands to bus and target is to comply with the + * standard DPT wire-down scheme: + */ +int +dpt_user_cmd(dpt_softc_t * dpt, eata_pt_t * user_cmd, + caddr_t cmdarg, int minor_no) +{ + dpt_ccb_t *ccb; + void *data; + int channel, target, lun; + int huh; + int result; + int ospl; + int submitted; + + data = NULL; + channel = minor2hba(minor_no); + target = minor2target(minor_no); + lun = minor2lun(minor_no); + + if ((channel > (dpt->channels - 1)) + || (target > dpt->max_id) + || (lun > dpt->max_lun)) + return (ENXIO); + + if (target == dpt->sc_scsi_link[channel].adapter_targ) { + /* This one is for the controller itself */ + if ((user_cmd->eataID[0] != 'E') + || (user_cmd->eataID[1] != 'A') + || (user_cmd->eataID[2] != 'T') + || (user_cmd->eataID[3] != 'A')) { + return (ENXIO); + } + } + /* Get a DPT CCB, so we can prepare a command */ + ospl = splsoftcam(); + + /* Process the free list */ + if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) { + printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n" + " Please try later\n", + dpt->unit); + splx(ospl); + return (EFAULT); + } + /* Now grab the newest CCB */ + if ((ccb = dpt_Qpop_free(dpt)) == NULL) { + splx(ospl); + panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit); + } else { + splx(ospl); + /* Clean up the leftover of the previous tenant */ + ccb->status = DPT_CCB_STATE_NEW; + } + + bcopy((caddr_t) & user_cmd->command_packet, (caddr_t) & ccb->eata_ccb, + sizeof(eata_ccb_t)); + + /* We do not want to do user specified scatter/gather. Why?? */ + if (ccb->eata_ccb.scatter == 1) + return (EINVAL); + + ccb->eata_ccb.Auto_Req_Sen = 1; + ccb->eata_ccb.reqlen = htonl(sizeof(struct scsi_sense_data)); + ccb->eata_ccb.cp_datalen = htonl(sizeof(ccb->eata_ccb.cp_datalen)); + ccb->eata_ccb.cp_dataDMA = htonl(vtophys(ccb->eata_ccb.cp_dataDMA)); + ccb->eata_ccb.cp_statDMA = htonl(vtophys(&ccb->eata_ccb.cp_statDMA)); + ccb->eata_ccb.cp_reqDMA = htonl(vtophys(&ccb->eata_ccb.cp_reqDMA)); + ccb->eata_ccb.cp_viraddr = (u_int32_t) & ccb; + + if (ccb->eata_ccb.DataIn || ccb->eata_ccb.DataOut) { + /* Data I/O is involved in this command. Alocate buffer */ + if (ccb->eata_ccb.cp_datalen > PAGE_SIZE) { + data = contigmalloc(ccb->eata_ccb.cp_datalen, + M_TEMP, M_WAITOK, 0, ~0, + ccb->eata_ccb.cp_datalen, + 0x10000); + } else { + data = malloc(ccb->eata_ccb.cp_datalen, M_TEMP, + M_WAITOK); + } + + if (data == NULL) { + printf("dpt%d: Cannot allocate %d bytes " + "for EATA command\n", dpt->unit, + ccb->eata_ccb.cp_datalen); + return (EFAULT); + } +#define usr_cmd_DMA (caddr_t)user_cmd->command_packet.cp_dataDMA + if (ccb->eata_ccb.DataIn == 1) { + if (copyin(usr_cmd_DMA, + data, ccb->eata_ccb.cp_datalen) == -1) + return (EFAULT); + } + } else { + /* No data I/O involved here. Make sure the DPT knows that */ + ccb->eata_ccb.cp_datalen = 0; + data = NULL; + } + + if (ccb->eata_ccb.FWNEST == 1) + ccb->eata_ccb.FWNEST = 0; + + if (ccb->eata_ccb.cp_datalen != 0) { + if (dpt_scatter_gather(dpt, ccb, ccb->eata_ccb.cp_datalen, + data) != 0) { + if (data != NULL) + free(data, M_TEMP); + return (EFAULT); + } + } + /** + * We are required to quiet a SCSI bus. + * since we do not queue comands on a bus basis, + * we wait for ALL commands on a controller to complete. + * In the mean time, sched_queue() will not schedule new commands. + */ + if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD) + && (ccb->eata_ccb.cp_cdb[2] == BUS_QUIET)) { + /* We wait for ALL traffic for this HBa to subside */ + ospl = splsoftcam(); + dpt->state |= DPT_HA_QUIET; + splx(ospl); + + while ((submitted = dpt->submitted_ccbs_count) != 0) { + huh = tsleep((void *) dpt, PCATCH | PRIBIO, "dptqt", + 100 * hz); + switch (huh) { + case 0: + /* Wakeup call received */ + break; + case EWOULDBLOCK: + /* Timer Expired */ + break; + default: + /* anything else */ + break; + } + } + } + /* Resume normal operation */ + if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD) + && (ccb->eata_ccb.cp_cdb[2] == BUS_UNQUIET)) { + ospl = splsoftcam(); + dpt->state &= ~DPT_HA_QUIET; + splx(ospl); + } + /** + * Schedule the command and submit it. + * We bypass dpt_sched_queue, as it will block on DPT_HA_QUIET + */ + ccb->xs = NULL; + ccb->flags = 0; + ccb->eata_ccb.Auto_Req_Sen = 1; /* We always want this feature */ + + ccb->transaction_id = ++dpt->commands_processed; + ccb->std_callback = (ccb_callback) dpt_user_cmd_done; + ccb->result = (u_int32_t) & cmdarg; + ccb->data = data; + +#ifdef DPT_MEASURE_PERFORMANCE + ++dpt->performance.command_count[ccb->eata_ccb.cp_scsi_cmd]; + ccb->command_started = microtime_now; +#endif + ospl = splcam(); + dpt_Qadd_waiting(dpt, ccb); + splx(ospl); + + dpt_sched_queue(dpt); + + /* Wait for the command to complete */ + (void) tsleep((void *) ccb, PCATCH | PRIBIO, "dptucw", 100 * hz); + + /* Free allocated memory */ + if (data != NULL) + free(data, M_TEMP); + + return (0); +} + +static void +dpt_user_cmd_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb) +{ + int ospl = splsoftcam(); + u_int32_t result; + caddr_t cmd_arg; + + /** + * If Auto Request Sense is on, copyout the sense struct + */ +#define usr_pckt_DMA (caddr_t)(intptr_t)ntohl(ccb->eata_ccb.cp_reqDMA) +#define usr_pckt_len ntohl(ccb->eata_ccb.cp_datalen) + if (ccb->eata_ccb.Auto_Req_Sen == 1) { + if (copyout((caddr_t) & ccb->sense_data, usr_pckt_DMA, + sizeof(struct scsi_sense_data))) { + ccb->result = EFAULT; + dpt_Qpush_free(dpt, ccb); + splx(ospl); + wakeup(ccb); + return; + } + } + /* If DataIn is on, copyout the data */ + if ((ccb->eata_ccb.DataIn == 1) + && (ccb->status_packet.hba_stat == HA_NO_ERROR)) { + if (copyout(ccb->data, usr_pckt_DMA, usr_pckt_len)) { + dpt_Qpush_free(dpt, ccb); + ccb->result = EFAULT; + + splx(ospl); + wakeup(ccb); + return; + } + } + /* Copyout the status */ + result = ccb->status_packet.hba_stat; + cmd_arg = (caddr_t) ccb->result; + + if (copyout((caddr_t) & result, cmd_arg, sizeof(result))) { + dpt_Qpush_free(dpt, ccb); + ccb->result = EFAULT; + splx(ospl); + wakeup(ccb); + return; + } + /* Put the CCB back in the freelist */ + ccb->state |= DPT_CCB_STATE_COMPLETED; + dpt_Qpush_free(dpt, ccb); + + /* Free allocated memory */ + splx(ospl); + return; +} + +#ifdef DPT_HANDLE_TIMEOUTS +/** + * This function walks down the SUBMITTED queue. + * Every request that is too old gets aborted and marked. + * Since the DPT will complete (interrupt) immediately (what does that mean?), + * We just walk the list, aborting old commands and marking them as such. + * The dpt_complete function will get rid of the that were interrupted in the + * normal manner. + * + * This function needs to run at splcam(), as it interacts with the submitted + * queue, as well as the completed and free queues. Just like dpt_intr() does. + * To run it at any ISPL other than that of dpt_intr(), will mean that dpt_intr + * willbe able to pre-empt it, grab a transaction in progress (towards + * destruction) and operate on it. The state of this transaction will be not + * very clear. + * The only other option, is to lock it only as long as necessary but have + * dpt_intr() spin-wait on it. In a UP environment this makes no sense and in + * a SMP environment, the advantage is dubvious for a function that runs once + * every ten seconds for few microseconds and, on systems with healthy + * hardware, does not do anything anyway. + */ + +static void +dpt_handle_timeouts(dpt_softc_t * dpt) +{ + dpt_ccb_t *ccb; + int ospl; + + ospl = splcam(); + + if (dpt->state & DPT_HA_TIMEOUTS_ACTIVE) { + printf("dpt%d WARNING: Timeout Handling Collision\n", + dpt->unit); + splx(ospl); + return; + } + dpt->state |= DPT_HA_TIMEOUTS_ACTIVE; + + /* Loop through the entire submitted queue, looking for lost souls */ + for (ccb = TAILQ_FIRST(&dpt->submitted_ccbs); + ccb != NULL; + ccb = TAILQ_NEXT(ccb, links)) { + struct scsi_xfer *xs; + u_int32_t age, max_age; + + xs = ccb->xs; + age = dpt_time_delta(ccb->command_started, microtime_now); + +#define TenSec 10000000 + + if (xs == NULL) { /* Local, non-kernel call */ + max_age = TenSec; + } else { + max_age = (((xs->timeout * (dpt->submitted_ccbs_count + + DPT_TIMEOUT_FACTOR)) + > TenSec) + ? (xs->timeout * (dpt->submitted_ccbs_count + + DPT_TIMEOUT_FACTOR)) + : TenSec); + } + + /* + * If a transaction is marked lost and is TWICE as old as we + * care, then, and only then do we destroy it! + */ + if (ccb->state & DPT_CCB_STATE_MARKED_LOST) { + /* Remember who is next */ + if (age > (max_age * 2)) { + dpt_Qremove_submitted(dpt, ccb); + ccb->state &= ~DPT_CCB_STATE_MARKED_LOST; + ccb->state |= DPT_CCB_STATE_ABORTED; +#define cmd_name scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd) + if (ccb->retries++ > DPT_RETRIES) { + printf("dpt%d ERROR: Destroying stale " + "%d (%s)\n" + " on " + "c%db%dt%du%d (%d/%d)\n", + dpt->unit, ccb->transaction_id, + cmd_name, + dpt->unit, + ccb->eata_ccb.cp_channel, + ccb->eata_ccb.cp_id, + ccb->eata_ccb.cp_LUN, age, + ccb->retries); +#define send_ccb &ccb->eata_ccb +#define ESA EATA_SPECIFIC_ABORT + (void) dpt_send_immediate(dpt, + send_ccb, + ESA, + 0, 0); + dpt_Qpush_free(dpt, ccb); + + /* The SCSI layer should re-try */ + xs->error |= XS_TIMEOUT; + xs->flags |= SCSI_ITSDONE; + scsi_done(xs); + } else { + printf("dpt%d ERROR: Stale %d (%s) on " + "c%db%dt%du%d (%d)\n" + " gets another " + "chance(%d/%d)\n", + dpt->unit, ccb->transaction_id, + cmd_name, + dpt->unit, + ccb->eata_ccb.cp_channel, + ccb->eata_ccb.cp_id, + ccb->eata_ccb.cp_LUN, + age, ccb->retries, DPT_RETRIES); + + dpt_Qpush_waiting(dpt, ccb); + dpt_sched_queue(dpt); + } + } + } else { + /* + * This is a transaction that is not to be destroyed + * (yet) But it is too old for our liking. We wait as + * long as the upper layer thinks. Not really, we + * multiply that by the number of commands in the + * submitted queue + 1. + */ + if (!(ccb->state & DPT_CCB_STATE_MARKED_LOST) && + (age != ~0) && (age > max_age)) { + printf("dpt%d ERROR: Marking %d (%s) on " + "c%db%dt%du%d \n" + " as late after %dusec\n", + dpt->unit, ccb->transaction_id, + cmd_name, + dpt->unit, ccb->eata_ccb.cp_channel, + ccb->eata_ccb.cp_id, + ccb->eata_ccb.cp_LUN, age); + ccb->state |= DPT_CCB_STATE_MARKED_LOST; + } + } + } + + dpt->state &= ~DPT_HA_TIMEOUTS_ACTIVE; + splx(ospl); +} + +static void +dpt_timeout(void *arg) +{ + dpt_softc_t *dpt = (dpt_softc_t *) arg; + + if (!(dpt->state & DPT_HA_TIMEOUTS_ACTIVE)) + dpt_handle_timeouts(dpt); + + timeout(dpt_timeout, (caddr_t) dpt, hz * 10); +} + +#endif /* DPT_HANDLE_TIMEOUTS */ + +#endif |
