Date: Thu, 28 May 2009 20:08:15 GMT From: Alexander Motin <mav@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 162966 for review Message-ID: <200905282008.n4SK8FQm090616@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=162966 Change 162966 by mav@mav_mavbook on 2009/05/28 20:08:04 Improve error reporting. Add request timeout handling. Affected files ... .. //depot/projects/scottl-camlock/src/sys/dev/ahci/ahci.c#5 edit .. //depot/projects/scottl-camlock/src/sys/dev/ahci/ahci.h#2 edit Differences ... ==== //depot/projects/scottl-camlock/src/sys/dev/ahci/ahci.c#5 (text+ko) ==== @@ -66,7 +66,8 @@ static void ahci_begin_transaction(device_t dev, union ccb *ccb); static void ahci_dmasetprd(void *arg, bus_dma_segment_t *segs, int nsegs, int error); static void ahci_execute_command(struct ahci_slot *slot); -static void ahci_end_transaction(struct ahci_slot *slot, int err); +static void ahci_timeout(struct ahci_slot *slot); +static void ahci_end_transaction(struct ahci_slot *slot, enum ahci_err_type et); //static int ahci_pm_read(device_t dev, int port, int reg, u_int32_t *result); //static int ahci_pm_write(device_t dev, int port, int reg, u_int32_t result); static int ahci_hardreset(device_t dev, int port, uint32_t *signature); @@ -621,7 +622,8 @@ device_t dev = (device_t)data; struct ahci_channel *ch = device_get_softc(dev); uint32_t istatus, cstatus, res, err; - int i; + enum ahci_err_type et; + int i, ccs; mtx_lock(&ch->mtx); /* Read interrupt and command statuses. */ @@ -641,12 +643,15 @@ if ((istatus & AHCI_STATBITS) && (cstatus & ch->rslots)) { device_printf(dev, "%s ERROR is %08x cs %08x rs %08x\n", __func__, istatus, cstatus, ch->rslots); + ccs = (ATA_INL(ch->r_mem, AHCI_P_CMD) & AHCI_P_CMD_CCS_MASK) + >> AHCI_P_CMD_CCS_SHIFT; /* kick controller into sane state */ ahci_stop(dev); ahci_start(dev); res = ch->rslots; err = ch->rslots & cstatus; } else { + ccs = 0; res = ch->rslots & ~cstatus; err = 0; } @@ -662,7 +667,14 @@ continue; } /* Process request completion. */ - ahci_end_transaction(&ch->slot[i], err & (1 << i)); + et = AHCI_ERR_NONE; + if ((err >> i) & 1) { + if (i == ccs) + et = AHCI_ERR_REAL; + else + et = AHCI_ERR_BTW; + } + ahci_end_transaction(&ch->slot[i], et); } mtx_unlock(&ch->mtx); } @@ -842,14 +854,38 @@ } /* start the timeout */ -// callout_reset(&request->callout, request->timeout * hz, -// (timeout_t*)ata_timeout, request); + callout_reset(&slot->timeout, (int)slot->ccb->ccb_h.timeout * hz / 1000, + (timeout_t*)ahci_timeout, slot); return; } -/* must be called with ATA channel locked and state_mtx held */ +/* Locked by callout mechanism. */ +static void +ahci_timeout(struct ahci_slot *slot) +{ + device_t dev = slot->dev; + struct ahci_channel *ch = device_get_softc(dev); + enum ahci_err_type et; + int i; + +device_printf(dev, "Timeout on slot %d\n", slot->slot); + ahci_stop(dev); + for (i = 0; i < AHCI_MAX_SLOTS; i++) { + /* Do we have a running request on slot? */ + if (ch->slot[i].state < AHCI_SLOT_RUNNING) + continue; + if (i == slot->slot) + et = AHCI_ERR_TIMEOUT; + else + et = AHCI_ERR_RESET; + ahci_end_transaction(&ch->slot[i], et); + } + ahci_reset(dev); +} + +/* Must be called with channel locked. */ static void -ahci_end_transaction(struct ahci_slot *slot, int err) +ahci_end_transaction(struct ahci_slot *slot, enum ahci_err_type et) { device_t dev = slot->dev; struct ahci_channel *ch = device_get_softc(dev); @@ -858,7 +894,7 @@ //device_printf(dev, "%s slot %d\n", __func__, slot->slot); /* kill the timeout */ -// callout_stop(&request->callout); + callout_stop(&slot->timeout); /* get status */ tf_data = ATA_INL(ch->r_mem, AHCI_P_TFD); @@ -901,11 +937,13 @@ bus_dmamap_unload(ch->dma.data_tag, slot->dma.data_map); } - if (err == 0) { + switch (et) { + case AHCI_ERR_NONE: slot->ccb->ccb_h.status = CAM_REQ_CMP; if (slot->ccb->ccb_h.func_code == XPT_SCSI_IO) slot->ccb->csio.scsi_status = SCSI_STATUS_OK; - } else { + break; + case AHCI_ERR_REAL: if (slot->ccb->ccb_h.func_code == XPT_SCSI_IO) { slot->ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR; slot->ccb->csio.scsi_status = SCSI_STATUS_CHECK_COND; @@ -913,6 +951,18 @@ slot->ccb->ccb_h.status = CAM_REQ_CMP_ERR; slot->ccb->ataio.status = tf_data; } + break; + case AHCI_ERR_BTW: + slot->ccb->ccb_h.status = CAM_REQUEUE_REQ; + break; + case AHCI_ERR_RESET: + slot->ccb->ccb_h.status = CAM_SCSI_BUS_RESET; + break; + case AHCI_ERR_TIMEOUT: + slot->ccb->ccb_h.status = CAM_CMD_TIMEOUT; + break; + default: + slot->ccb->ccb_h.status = CAM_REQ_CMP_ERR; } xpt_done(slot->ccb); @@ -1387,7 +1437,7 @@ slot->slot = i; slot->state = AHCI_SLOT_EMPTY; slot->ccb = NULL; - callout_init(&slot->timeout, 1); + callout_init_mtx(&slot->timeout, &ch->mtx, 0); if (bus_dma_tag_create(ch->dma.dmatag, PAGE_SIZE, PAGE_SIZE, ch->dma.max_address, BUS_SPACE_MAXADDR, ==== //depot/projects/scottl-camlock/src/sys/dev/ahci/ahci.h#2 (text+ko) ==== @@ -206,6 +206,7 @@ #define AHCI_P_CMD_CLO 0x00000008 #define AHCI_P_CMD_FRE 0x00000010 #define AHCI_P_CMD_CCS_MASK 0x00001f00 +#define AHCI_P_CMD_CCS_SHIFT 8 #define AHCI_P_CMD_ISS 0x00002000 #define AHCI_P_CMD_FR 0x00004000 #define AHCI_P_CMD_CR 0x00008000 @@ -450,6 +451,14 @@ } interrupt[AHCI_MAX_PORTS]; }; +enum ahci_err_type { + AHCI_ERR_NONE, + AHCI_ERR_REAL, + AHCI_ERR_BTW, + AHCI_ERR_RESET, + AHCI_ERR_TIMEOUT +}; + /* disk bay/enclosure related */ #define ATA_LED_OFF 0x00 #define ATA_LED_RED 0x01
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