/* * Disk Array driver for HP Smart Array SAS controllers * Copyright 2000, 2009 Hewlett-Packard Development Company, L.P. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Questions/Comments/Bugfixes to iss_storagedev@hp.com * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "hpsa_cmd.h" #include "hpsa.h" /* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */ #define HPSA_DRIVER_VERSION "2.0.2-1" #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")" #define HPSA "hpsa" /* How long to wait (in milliseconds) for board to go into simple mode */ #define MAX_CONFIG_WAIT 30000 #define MAX_IOCTL_CONFIG_WAIT 1000 /*define how many times we will try a command because of bus resets */ #define MAX_CMD_RETRIES 3 /* Embedded module documentation macros - see modules.h */ MODULE_AUTHOR("Hewlett-Packard Company"); MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \ HPSA_DRIVER_VERSION); MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers"); MODULE_VERSION(HPSA_DRIVER_VERSION); MODULE_LICENSE("GPL"); static int hpsa_allow_any; module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(hpsa_allow_any, "Allow hpsa driver to access unknown HP Smart Array hardware"); static int hpsa_simple_mode; module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR); MODULE_PARM_DESC(hpsa_simple_mode, "Use 'simple mode' rather than 'performant mode'"); /* define the PCI info for the cards we can control */ static const struct pci_device_id hpsa_pci_device_id[] = { {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324a}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324b}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3233}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3350}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3351}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3352}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3353}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3354}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3355}, {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3356}, {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0}, {0,} }; MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id); /* board_id = Subsystem Device ID & Vendor ID * product = Marketing Name for the board * access = Address of the struct of function pointers */ static struct board_type products[] = { {0x3241103C, "Smart Array P212", &SA5_access}, {0x3243103C, "Smart Array P410", &SA5_access}, {0x3245103C, "Smart Array P410i", &SA5_access}, {0x3247103C, "Smart Array P411", &SA5_access}, {0x3249103C, "Smart Array P812", &SA5_access}, {0x324a103C, "Smart Array P712m", &SA5_access}, {0x324b103C, "Smart Array P711m", &SA5_access}, {0x3350103C, "Smart Array", &SA5_access}, {0x3351103C, "Smart Array", &SA5_access}, {0x3352103C, "Smart Array", &SA5_access}, {0x3353103C, "Smart Array", &SA5_access}, {0x3354103C, "Smart Array", &SA5_access}, {0x3355103C, "Smart Array", &SA5_access}, {0x3356103C, "Smart Array", &SA5_access}, {0xFFFF103C, "Unknown Smart Array", &SA5_access}, }; static int number_of_controllers; static struct list_head hpsa_ctlr_list = LIST_HEAD_INIT(hpsa_ctlr_list); static spinlock_t lockup_detector_lock; static struct task_struct *hpsa_lockup_detector; static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id); static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id); static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg); static void start_io(struct ctlr_info *h); #ifdef CONFIG_COMPAT static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg); #endif static void cmd_free(struct ctlr_info *h, struct CommandList *c); static void cmd_special_free(struct ctlr_info *h, struct CommandList *c); static struct CommandList *cmd_alloc(struct ctlr_info *h); static struct CommandList *cmd_special_alloc(struct ctlr_info *h); static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h, void *buff, size_t size, u8 page_code, unsigned char *scsi3addr, int cmd_type); static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd); static void hpsa_scan_start(struct Scsi_Host *); static int hpsa_scan_finished(struct Scsi_Host *sh, unsigned long elapsed_time); static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason); static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd); static int hpsa_slave_alloc(struct scsi_device *sdev); static void hpsa_slave_destroy(struct scsi_device *sdev); static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno); static int check_for_unit_attention(struct ctlr_info *h, struct CommandList *c); static void check_ioctl_unit_attention(struct ctlr_info *h, struct CommandList *c); /* performant mode helper functions */ static void calc_bucket_map(int *bucket, int num_buckets, int nsgs, int *bucket_map); static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h); static inline u32 next_command(struct ctlr_info *h); static int __devinit hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index, u64 *cfg_offset); static int __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev, unsigned long *memory_bar); static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id); static int __devinit hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr, int wait_for_ready); #define BOARD_NOT_READY 0 #define BOARD_READY 1 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev) { unsigned long *priv = shost_priv(sdev->host); return (struct ctlr_info *) *priv; } static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh) { unsigned long *priv = shost_priv(sh); return (struct ctlr_info *) *priv; } static int check_for_unit_attention(struct ctlr_info *h, struct CommandList *c) { if (c->err_info->SenseInfo[2] != UNIT_ATTENTION) return 0; switch (c->err_info->SenseInfo[12]) { case STATE_CHANGED: dev_warn(&h->pdev->dev, HPSA "%d: a state change " "detected, command retried\n", h->ctlr); break; case LUN_FAILED: dev_warn(&h->pdev->dev, HPSA "%d: LUN failure " "detected, action required\n", h->ctlr); break; case REPORT_LUNS_CHANGED: dev_warn(&h->pdev->dev, HPSA "%d: report LUN data " "changed, action required\n", h->ctlr); /* * Note: this REPORT_LUNS_CHANGED condition only occurs on the external * target (array) devices. */ break; case POWER_OR_RESET: dev_warn(&h->pdev->dev, HPSA "%d: a power on " "or device reset detected\n", h->ctlr); break; case UNIT_ATTENTION_CLEARED: dev_warn(&h->pdev->dev, HPSA "%d: unit attention " "cleared by another initiator\n", h->ctlr); break; default: dev_warn(&h->pdev->dev, HPSA "%d: unknown " "unit attention detected\n", h->ctlr); break; } return 1; } static ssize_t host_store_rescan(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct ctlr_info *h; struct Scsi_Host *shost = class_to_shost(dev); h = shost_to_hba(shost); hpsa_scan_start(h->scsi_host); return count; } static ssize_t host_show_firmware_revision(struct device *dev, struct device_attribute *attr, char *buf) { struct ctlr_info *h; struct Scsi_Host *shost = class_to_shost(dev); unsigned char *fwrev; h = shost_to_hba(shost); if (!h->hba_inquiry_data) return 0; fwrev = &h->hba_inquiry_data[32]; return snprintf(buf, 20, "%c%c%c%c\n", fwrev[0], fwrev[1], fwrev[2], fwrev[3]); } static ssize_t host_show_commands_outstanding(struct device *dev, struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = class_to_shost(dev); struct ctlr_info *h = shost_to_hba(shost); return snprintf(buf, 20, "%d\n", h->commands_outstanding); } static ssize_t host_show_transport_mode(struct device *dev, struct device_attribute *attr, char *buf) { struct ctlr_info *h; struct Scsi_Host *shost = class_to_shost(dev); h = shost_to_hba(shost); return snprintf(buf, 20, "%s\n", h->transMethod & CFGTBL_Trans_Performant ? "performant" : "simple"); } /* List of controllers which cannot be hard reset on kexec with reset_devices */ static u32 unresettable_controller[] = { 0x324a103C, /* Smart Array P712m */ 0x324b103C, /* SmartArray P711m */ 0x3223103C, /* Smart Array P800 */ 0x3234103C, /* Smart Array P400 */ 0x3235103C, /* Smart Array P400i */ 0x3211103C, /* Smart Array E200i */ 0x3212103C, /* Smart Array E200 */ 0x3213103C, /* Smart Array E200i */ 0x3214103C, /* Smart Array E200i */ 0x3215103C, /* Smart Array E200i */ 0x3237103C, /* Smart Array E500 */ 0x323D103C, /* Smart Array P700m */ 0x40800E11, /* Smart Array 5i */ 0x409C0E11, /* Smart Array 6400 */ 0x409D0E11, /* Smart Array 6400 EM */ 0x40700E11, /* Smart Array 5300 */ 0x40820E11, /* Smart Array 532 */ 0x40830E11, /* Smart Array 5312 */ 0x409A0E11, /* Smart Array 641 */ 0x409B0E11, /* Smart Array 642 */ 0x40910E11, /* Smart Array 6i */ }; /* List of controllers which cannot even be soft reset */ static u32 soft_unresettable_controller[] = { 0x40800E11, /* Smart Array 5i */ 0x40700E11, /* Smart Array 5300 */ 0x40820E11, /* Smart Array 532 */ 0x40830E11, /* Smart Array 5312 */ 0x409A0E11, /* Smart Array 641 */ 0x409B0E11, /* Smart Array 642 */ 0x40910E11, /* Smart Array 6i */ /* Exclude 640x boards. These are two pci devices in one slot * which share a battery backed cache module. One controls the * cache, the other accesses the cache through the one that controls * it. If we reset the one controlling the cache, the other will * likely not be happy. Just forbid resetting this conjoined mess. * The 640x isn't really supported by hpsa anyway. */ 0x409C0E11, /* Smart Array 6400 */ 0x409D0E11, /* Smart Array 6400 EM */ }; static int ctlr_is_hard_resettable(u32 board_id) { int i; for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++) if (unresettable_controller[i] == board_id) return 0; return 1; } static int ctlr_is_soft_resettable(u32 board_id) { int i; for (i = 0; i < ARRAY_SIZE(soft_unresettable_controller); i++) if (soft_unresettable_controller[i] == board_id) return 0; return 1; } static int ctlr_is_resettable(u32 board_id) { return ctlr_is_hard_resettable(board_id) || ctlr_is_soft_resettable(board_id); } static ssize_t host_show_resettable(struct device *dev, struct device_attribute *attr, char *buf) { struct ctlr_info *h; struct Scsi_Host *shost = class_to_shost(dev); h = shost_to_hba(shost); return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id)); } static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[]) { return (scsi3addr[3] & 0xC0) == 0x40; } static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG", "UNKNOWN" }; #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 1) static ssize_t raid_level_show(struct device *dev, struct device_attribute *attr, char *buf) { ssize_t l = 0; unsigned char rlevel; struct ctlr_info *h; struct scsi_device *sdev; struct hpsa_scsi_dev_t *hdev; unsigned long flags; sdev = to_scsi_device(dev); h = sdev_to_hba(sdev); spin_lock_irqsave(&h->lock, flags); hdev = sdev->hostdata; if (!hdev) { spin_unlock_irqrestore(&h->lock, flags); return -ENODEV; } /* Is this even a logical drive? */ if (!is_logical_dev_addr_mode(hdev->scsi3addr)) { spin_unlock_irqrestore(&h->lock, flags); l = snprintf(buf, PAGE_SIZE, "N/A\n"); return l; } rlevel = hdev->raid_level; spin_unlock_irqrestore(&h->lock, flags); if (rlevel > RAID_UNKNOWN) rlevel = RAID_UNKNOWN; l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]); return l; } static ssize_t lunid_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ctlr_info *h; struct scsi_device *sdev; struct hpsa_scsi_dev_t *hdev; unsigned long flags; unsigned char lunid[8]; sdev = to_scsi_device(dev); h = sdev_to_hba(sdev); spin_lock_irqsave(&h->lock, flags); hdev = sdev->hostdata; if (!hdev) { spin_unlock_irqrestore(&h->lock, flags); return -ENODEV; } memcpy(lunid, hdev->scsi3addr, sizeof(lunid)); spin_unlock_irqrestore(&h->lock, flags); return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", lunid[0], lunid[1], lunid[2], lunid[3], lunid[4], lunid[5], lunid[6], lunid[7]); } static ssize_t unique_id_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ctlr_info *h; struct scsi_device *sdev; struct hpsa_scsi_dev_t *hdev; unsigned long flags; unsigned char sn[16]; sdev = to_scsi_device(dev); h = sdev_to_hba(sdev); spin_lock_irqsave(&h->lock, flags); hdev = sdev->hostdata; if (!hdev) { spin_unlock_irqrestore(&h->lock, flags); return -ENODEV; } memcpy(sn, hdev->device_id, sizeof(sn)); spin_unlock_irqrestore(&h->lock, flags); return snprintf(buf, 16 * 2 + 2, "%02X%02X%02X%02X%02X%02X%02X%02X" "%02X%02X%02X%02X%02X%02X%02X%02X\n", sn[0], sn[1], sn[2], sn[3], sn[4], sn[5], sn[6], sn[7], sn[8], sn[9], sn[10], sn[11], sn[12], sn[13], sn[14], sn[15]); } static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL); static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL); static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL); static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan); static DEVICE_ATTR(firmware_revision, S_IRUGO, host_show_firmware_revision, NULL); static DEVICE_ATTR(commands_outstanding, S_IRUGO, host_show_commands_outstanding, NULL); static DEVICE_ATTR(transport_mode, S_IRUGO, host_show_transport_mode, NULL); static DEVICE_ATTR(resettable, S_IRUGO, host_show_resettable, NULL); static struct device_attribute *hpsa_sdev_attrs[] = { &dev_attr_raid_level, &dev_attr_lunid, &dev_attr_unique_id, NULL, }; static struct device_attribute *hpsa_shost_attrs[] = { &dev_attr_rescan, &dev_attr_firmware_revision, &dev_attr_commands_outstanding, &dev_attr_transport_mode, &dev_attr_resettable, NULL, }; static struct scsi_host_template hpsa_driver_template = { .module = THIS_MODULE, .name = HPSA, .proc_name = HPSA, .queuecommand = hpsa_scsi_queue_command, .scan_start = hpsa_scan_start, .scan_finished = hpsa_scan_finished, .change_queue_depth = hpsa_change_queue_depth, .this_id = -1, .use_clustering = ENABLE_CLUSTERING, .eh_device_reset_handler = hpsa_eh_device_reset_handler, .ioctl = hpsa_ioctl, .slave_alloc = hpsa_slave_alloc, .slave_destroy = hpsa_slave_destroy, #ifdef CONFIG_COMPAT .compat_ioctl = hpsa_compat_ioctl, #endif .sdev_attrs = hpsa_sdev_attrs, .shost_attrs = hpsa_shost_attrs, .max_sectors = 8192, }; /* Enqueuing and dequeuing functions for cmdlists. */ static inline void addQ(struct list_head *list, struct CommandList *c) { list_add_tail(&c->list, list); } static inline u32 next_command(struct ctlr_info *h) { u32 a; if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant))) return h->access.command_completed(h); if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) { a = *(h->reply_pool_head); /* Next cmd in ring buffer */ (h->reply_pool_head)++; h->commands_outstanding--; } else { a = FIFO_EMPTY; } /* Check for wraparound */ if (h->reply_pool_head == (h->reply_pool + h->max_commands)) { h->reply_pool_head = h->reply_pool; h->reply_pool_wraparound ^= 1; } return a; } /* set_performant_mode: Modify the tag for cciss performant * set bit 0 for pull model, bits 3-1 for block fetch * register number */ static void set_performant_mode(struct ctlr_info *h, struct CommandList *c) { if (likely(h->transMethod & CFGTBL_Trans_Performant)) c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1); } static void enqueue_cmd_and_start_io(struct ctlr_info *h, struct CommandList *c) { unsigned long flags; set_performant_mode(h, c); spin_lock_irqsave(&h->lock, flags); addQ(&h->reqQ, c); h->Qdepth++; start_io(h); spin_unlock_irqrestore(&h->lock, flags); } static inline void removeQ(struct CommandList *c) { if (WARN_ON(list_empty(&c->list))) return; list_del_init(&c->list); } static inline int is_hba_lunid(unsigned char scsi3addr[]) { return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0; } static inline int is_scsi_rev_5(struct ctlr_info *h) { if (!h->hba_inquiry_data) return 0; if ((h->hba_inquiry_data[2] & 0x07) == 5) return 1; return 0; } static int hpsa_find_target_lun(struct ctlr_info *h, unsigned char scsi3addr[], int bus, int *target, int *lun) { /* finds an unused bus, target, lun for a new physical device * assumes h->devlock is held */ int i, found = 0; DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES); bitmap_zero(lun_taken, HPSA_MAX_DEVICES); for (i = 0; i < h->ndevices; i++) { if (h->dev[i]->bus == bus && h->dev[i]->target != -1) __set_bit(h->dev[i]->target, lun_taken); } i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES); if (i < HPSA_MAX_DEVICES) { /* *bus = 1; */ *target = i; *lun = 0; found = 1; } return !found; } /* Add an entry into h->dev[] array. */ static int hpsa_scsi_add_entry(struct ctlr_info *h, int hostno, struct hpsa_scsi_dev_t *device, struct hpsa_scsi_dev_t *added[], int *nadded) { /* assumes h->devlock is held */ int n = h->ndevices; int i; unsigned char addr1[8], addr2[8]; struct hpsa_scsi_dev_t *sd; if (n >= HPSA_MAX_DEVICES) { dev_err(&h->pdev->dev, "too many devices, some will be " "inaccessible.\n"); return -1; } /* physical devices do not have lun or target assigned until now. */ if (device->lun != -1) /* Logical device, lun is already assigned. */ goto lun_assigned; /* If this device a non-zero lun of a multi-lun device * byte 4 of the 8-byte LUN addr will contain the logical * unit no, zero otherise. */ if (device->scsi3addr[4] == 0) { /* This is not a non-zero lun of a multi-lun device */ if (hpsa_find_target_lun(h, device->scsi3addr, device->bus, &device->target, &device->lun) != 0) return -1; goto lun_assigned; } /* This is a non-zero lun of a multi-lun device. * Search through our list and find the device which * has the same 8 byte LUN address, excepting byte 4. * Assign the same bus and target for this new LUN. * Use the logical unit number from the firmware. */ memcpy(addr1, device->scsi3addr, 8); addr1[4] = 0; for (i = 0; i < n; i++) { sd = h->dev[i]; memcpy(addr2, sd->scsi3addr, 8); addr2[4] = 0; /* differ only in byte 4? */ if (memcmp(addr1, addr2, 8) == 0) { device->bus = sd->bus; device->target = sd->target; device->lun = device->scsi3addr[4]; break; } } if (device->lun == -1) { dev_warn(&h->pdev->dev, "physical device with no LUN=0," " suspect firmware bug or unsupported hardware " "configuration.\n"); return -1; } lun_assigned: h->dev[n] = device; h->ndevices++; added[*nadded] = device; (*nadded)++; /* initially, (before registering with scsi layer) we don't * know our hostno and we don't want to print anything first * time anyway (the scsi layer's inquiries will show that info) */ /* if (hostno != -1) */ dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d added.\n", scsi_device_type(device->devtype), hostno, device->bus, device->target, device->lun); return 0; } /* Update an entry in h->dev[] array. */ static void hpsa_scsi_update_entry(struct ctlr_info *h, int hostno, int entry, struct hpsa_scsi_dev_t *new_entry) { /* assumes h->devlock is held */ BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES); /* Raid level changed. */ h->dev[entry]->raid_level = new_entry->raid_level; dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d updated.\n", scsi_device_type(new_entry->devtype), hostno, new_entry->bus, new_entry->target, new_entry->lun); } /* Replace an entry from h->dev[] array. */ static void hpsa_scsi_replace_entry(struct ctlr_info *h, int hostno, int entry, struct hpsa_scsi_dev_t *new_entry, struct hpsa_scsi_dev_t *added[], int *nadded, struct hpsa_scsi_dev_t *removed[], int *nremoved) { /* assumes h->devlock is held */ BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES); removed[*nremoved] = h->dev[entry]; (*nremoved)++; /* * New physical devices won't have target/lun assigned yet * so we need to preserve the values in the slot we are replacing. */ if (new_entry->target == -1) { new_entry->target = h->dev[entry]->target; new_entry->lun = h->dev[entry]->lun; } h->dev[entry] = new_entry; added[*nadded] = new_entry; (*nadded)++; dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d changed.\n", scsi_device_type(new_entry->devtype), hostno, new_entry->bus, new_entry->target, new_entry->lun); } /* Remove an entry from h->dev[] array. */ static void hpsa_scsi_remove_entry(struct ctlr_info *h, int hostno, int entry, struct hpsa_scsi_dev_t *removed[], int *nremoved) { /* assumes h->devlock is held */ int i; struct hpsa_scsi_dev_t *sd; BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES); sd = h->dev[entry]; removed[*nremoved] = h->dev[entry]; (*nremoved)++; for (i = entry; i < h->ndevices-1; i++) h->dev[i] = h->dev[i+1]; h->ndevices--; dev_info(&h->pdev->dev, "%s device c%db%dt%dl%d removed.\n", scsi_device_type(sd->devtype), hostno, sd->bus, sd->target, sd->lun); } #define SCSI3ADDR_EQ(a, b) ( \ (a)[7] == (b)[7] && \ (a)[6] == (b)[6] && \ (a)[5] == (b)[5] && \ (a)[4] == (b)[4] && \ (a)[3] == (b)[3] && \ (a)[2] == (b)[2] && \ (a)[1] == (b)[1] && \ (a)[0] == (b)[0]) static void fixup_botched_add(struct ctlr_info *h, struct hpsa_scsi_dev_t *added) { /* called when scsi_add_device fails in order to re-adjust * h->dev[] to match the mid layer's view. */ unsigned long flags; int i, j; spin_lock_irqsave(&h->lock, flags); for (i = 0; i < h->ndevices; i++) { if (h->dev[i] == added) { for (j = i; j < h->ndevices-1; j++) h->dev[j] = h->dev[j+1]; h->ndevices--; break; } } spin_unlock_irqrestore(&h->lock, flags); kfree(added); } static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1, struct hpsa_scsi_dev_t *dev2) { /* we compare everything except lun and target as these * are not yet assigned. Compare parts likely * to differ first */ if (memcmp(dev1->scsi3addr, dev2->scsi3addr, sizeof(dev1->scsi3addr)) != 0) return 0; if (memcmp(dev1->device_id, dev2->device_id, sizeof(dev1->device_id)) != 0) return 0; if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0) return 0; if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0) return 0; if (dev1->devtype != dev2->devtype) return 0; if (dev1->bus != dev2->bus) return 0; return 1; } static inline int device_updated(struct hpsa_scsi_dev_t *dev1, struct hpsa_scsi_dev_t *dev2) { /* Device attributes that can change, but don't mean * that the device is a different device, nor that the OS * needs to be told anything about the change. */ if (dev1->raid_level != dev2->raid_level) return 1; return 0; } /* Find needle in haystack. If exact match found, return DEVICE_SAME, * and return needle location in *index. If scsi3addr matches, but not * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle * location in *index. * In the case of a minor device attribute change, such as RAID level, just * return DEVICE_UPDATED, along with the updated device's location in index. * If needle not found, return DEVICE_NOT_FOUND. */ static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle, struct hpsa_scsi_dev_t *haystack[], int haystack_size, int *index) { int i; #define DEVICE_NOT_FOUND 0 #define DEVICE_CHANGED 1 #define DEVICE_SAME 2 #define DEVICE_UPDATED 3 for (i = 0; i < haystack_size; i++) { if (haystack[i] == NULL) /* previously removed. */ continue; if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) { *index = i; if (device_is_the_same(needle, haystack[i])) { if (device_updated(needle, haystack[i])) return DEVICE_UPDATED; return DEVICE_SAME; } else { return DEVICE_CHANGED; } } } *index = -1; return DEVICE_NOT_FOUND; } static void adjust_hpsa_scsi_table(struct ctlr_info *h, int hostno, struct hpsa_scsi_dev_t *sd[], int nsds) { /* sd contains scsi3 addresses and devtypes, and inquiry * data. This function takes what's in sd to be the current * reality and updates h->dev[] to reflect that reality. */ int i, entry, device_change, changes = 0; struct hpsa_scsi_dev_t *csd; unsigned long flags; struct hpsa_scsi_dev_t **added, **removed; int nadded, nremoved; struct Scsi_Host *sh = NULL; added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL); removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL); if (!added || !removed) { dev_warn(&h->pdev->dev, "out of memory in " "adjust_hpsa_scsi_table\n"); goto free_and_out; } spin_lock_irqsave(&h->devlock, flags); /* find any devices in h->dev[] that are not in * sd[] and remove them from h->dev[], and for any * devices which have changed, remove the old device * info and add the new device info. * If minor device attributes change, just update * the existing device structure. */ i = 0; nremoved = 0; nadded = 0; while (i < h->ndevices) { csd = h->dev[i]; device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry); if (device_change == DEVICE_NOT_FOUND) { changes++; hpsa_scsi_remove_entry(h, hostno, i, removed, &nremoved); continue; /* remove ^^^, hence i not incremented */ } else if (device_change == DEVICE_CHANGED) { changes++; hpsa_scsi_replace_entry(h, hostno, i, sd[entry], added, &nadded, removed, &nremoved); /* Set it to NULL to prevent it from being freed * at the bottom of hpsa_update_scsi_devices() */ sd[entry] = NULL; } else if (device_change == DEVICE_UPDATED) { hpsa_scsi_update_entry(h, hostno, i, sd[entry]); } i++; } /* Now, make sure every device listed in sd[] is also * listed in h->dev[], adding them if they aren't found */ for (i = 0; i < nsds; i++) { if (!sd[i]) /* if already added above. */ continue; device_change = hpsa_scsi_find_entry(sd[i], h->dev, h->ndevices, &entry); if (device_change == DEVICE_NOT_FOUND) { changes++; if (hpsa_scsi_add_entry(h, hostno, sd[i], added, &nadded) != 0) break; sd[i] = NULL; /* prevent from being freed later. */ } else if (device_change == DEVICE_CHANGED) { /* should never happen... */ changes++; dev_warn(&h->pdev->dev, "device unexpectedly changed.\n"); /* but if it does happen, we just ignore that device */ } } spin_unlock_irqrestore(&h->devlock, flags); /* Don't notify scsi mid layer of any changes the first time through * (or if there are no changes) scsi_scan_host will do it later the * first time through. */ if (hostno == -1 || !changes) goto free_and_out; sh = h->scsi_host; /* Notify scsi mid layer of any removed devices */ for (i = 0; i < nremoved; i++) { struct scsi_device *sdev = scsi_device_lookup(sh, removed[i]->bus, removed[i]->target, removed[i]->lun); if (sdev != NULL) { scsi_remove_device(sdev); scsi_device_put(sdev); } else { /* We don't expect to get here. * future cmds to this device will get selection * timeout as if the device was gone. */ dev_warn(&h->pdev->dev, "didn't find c%db%dt%dl%d " " for removal.", hostno, removed[i]->bus, removed[i]->target, removed[i]->lun); } kfree(removed[i]); removed[i] = NULL; } /* Notify scsi mid layer of any added devices */ for (i = 0; i < nadded; i++) { if (scsi_add_device(sh, added[i]->bus, added[i]->target, added[i]->lun) == 0) continue; dev_warn(&h->pdev->dev, "scsi_add_device c%db%dt%dl%d failed, " "device not added.\n", hostno, added[i]->bus, added[i]->target, added[i]->lun); /* now we have to remove it from h->dev, * since it didn't get added to scsi mid layer */ fixup_botched_add(h, added[i]); } free_and_out: kfree(added); kfree(removed); } /* * Lookup bus/target/lun and retrun corresponding struct hpsa_scsi_dev_t * * Assume's h->devlock is held. */ static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h, int bus, int target, int lun) { int i; struct hpsa_scsi_dev_t *sd; for (i = 0; i < h->ndevices; i++) { sd = h->dev[i]; if (sd->bus == bus && sd->target == target && sd->lun == lun) return sd; } return NULL; } /* link sdev->hostdata to our per-device structure. */ static int hpsa_slave_alloc(struct scsi_device *sdev) { struct hpsa_scsi_dev_t *sd; unsigned long flags; struct ctlr_info *h; h = sdev_to_hba(sdev); spin_lock_irqsave(&h->devlock, flags); sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev), sdev_id(sdev), sdev->lun); if (sd != NULL) sdev->hostdata = sd; spin_unlock_irqrestore(&h->devlock, flags); return 0; } static void hpsa_slave_destroy(struct scsi_device *sdev) { /* nothing to do. */ } static void hpsa_free_sg_chain_blocks(struct ctlr_info *h) { int i; if (!h->cmd_sg_list) return; for (i = 0; i < h->nr_cmds; i++) { kfree(h->cmd_sg_list[i]); h->cmd_sg_list[i] = NULL; } kfree(h->cmd_sg_list); h->cmd_sg_list = NULL; } static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h) { int i; if (h->chainsize <= 0) return 0; h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds, GFP_KERNEL); if (!h->cmd_sg_list) return -ENOMEM; for (i = 0; i < h->nr_cmds; i++) { h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) * h->chainsize, GFP_KERNEL); if (!h->cmd_sg_list[i]) goto clean; } return 0; clean: hpsa_free_sg_chain_blocks(h); return -ENOMEM; } static void hpsa_map_sg_chain_block(struct ctlr_info *h, struct CommandList *c) { struct SGDescriptor *chain_sg, *chain_block; u64 temp64; chain_sg = &c->SG[h->max_cmd_sg_entries - 1]; chain_block = h->cmd_sg_list[c->cmdindex]; chain_sg->Ext = HPSA_SG_CHAIN; chain_sg->Len = sizeof(*chain_sg) * (c->Header.SGTotal - h->max_cmd_sg_entries); temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len, PCI_DMA_TODEVICE); chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL); chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL); } static void hpsa_unmap_sg_chain_block(struct ctlr_info *h, struct CommandList *c) { struct SGDescriptor *chain_sg; union u64bit temp64; if (c->Header.SGTotal <= h->max_cmd_sg_entries) return; chain_sg = &c->SG[h->max_cmd_sg_entries - 1]; temp64.val32.lower = chain_sg->Addr.lower; temp64.val32.upper = chain_sg->Addr.upper; pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE); } static void complete_scsi_command(struct CommandList *cp) { struct scsi_cmnd *cmd; struct ctlr_info *h; struct ErrorInfo *ei; unsigned char sense_key; unsigned char asc; /* additional sense code */ unsigned char ascq; /* additional sense code qualifier */ unsigned long sense_data_size; ei = cp->err_info; cmd = (struct scsi_cmnd *) cp->scsi_cmd; h = cp->h; scsi_dma_unmap(cmd); /* undo the DMA mappings */ if (cp->Header.SGTotal > h->max_cmd_sg_entries) hpsa_unmap_sg_chain_block(h, cp); cmd->result = (DID_OK << 16); /* host byte */ cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */ cmd->result |= ei->ScsiStatus; /* copy the sense data whether we need to or not. */ if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo)) sense_data_size = SCSI_SENSE_BUFFERSIZE; else sense_data_size = sizeof(ei->SenseInfo); if (ei->SenseLen < sense_data_size) sense_data_size = ei->SenseLen; memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size); scsi_set_resid(cmd, ei->ResidualCnt); if (ei->CommandStatus == 0) { cmd->scsi_done(cmd); cmd_free(h, cp); return; } /* an error has occurred */ switch (ei->CommandStatus) { case CMD_TARGET_STATUS: if (ei->ScsiStatus) { /* Get sense key */ sense_key = 0xf & ei->SenseInfo[2]; /* Get additional sense code */ asc = ei->SenseInfo[12]; /* Get addition sense code qualifier */ ascq = ei->SenseInfo[13]; } if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) { if (check_for_unit_attention(h, cp)) { cmd->result = DID_SOFT_ERROR << 16; break; } if (sense_key == ILLEGAL_REQUEST) { /* * SCSI REPORT_LUNS is commonly unsupported on * Smart Array. Suppress noisy complaint. */ if (cp->Request.CDB[0] == REPORT_LUNS) break; /* If ASC/ASCQ indicate Logical Unit * Not Supported condition, */ if ((asc == 0x25) && (ascq == 0x0)) { dev_warn(&h->pdev->dev, "cp %p " "has check condition\n", cp); break; } } if (sense_key == NOT_READY) { /* If Sense is Not Ready, Logical Unit * Not ready, Manual Intervention * required */ if ((asc == 0x04) && (ascq == 0x03)) { dev_warn(&h->pdev->dev, "cp %p " "has check condition: unit " "not ready, manual " "intervention required\n", cp); break; } } if (sense_key == ABORTED_COMMAND) { /* Aborted command is retryable */ dev_warn(&h->pdev->dev, "cp %p " "has check condition: aborted command: " "ASC: 0x%x, ASCQ: 0x%x\n", cp, asc, ascq); cmd->result = DID_SOFT_ERROR << 16; break; } /* Must be some other type of check condition */ dev_warn(&h->pdev->dev, "cp %p has check condition: " "unknown type: " "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, " "Returning result: 0x%x, " "cmd=[%02x %02x %02x %02x %02x " "%02x %02x %02x %02x %02x %02x " "%02x %02x %02x %02x %02x]\n", cp, sense_key, asc, ascq, cmd->result, cmd->cmnd[0], cmd->cmnd[1], cmd->cmnd[2], cmd->cmnd[3], cmd->cmnd[4], cmd->cmnd[5], cmd->cmnd[6], cmd->cmnd[7], cmd->cmnd[8], cmd->cmnd[9], cmd->cmnd[10], cmd->cmnd[11], cmd->cmnd[12], cmd->cmnd[13], cmd->cmnd[14], cmd->cmnd[15]); break; } /* Problem was not a check condition * Pass it up to the upper layers... */ if (ei->ScsiStatus) { dev_warn(&h->pdev->dev, "cp %p has status 0x%x " "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, " "Returning result: 0x%x\n", cp, ei->ScsiStatus, sense_key, asc, ascq, cmd->result); } else { /* scsi status is zero??? How??? */ dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. " "Returning no connection.\n", cp), /* Ordinarily, this case should never happen, * but there is a bug in some released firmware * revisions that allows it to happen if, for * example, a 4100 backplane loses power and * the tape drive is in it. We assume that * it's a fatal error of some kind because we * can't show that it wasn't. We will make it * look like selection timeout since that is * the most common reason for this to occur, * and it's severe enough. */ cmd->result = DID_NO_CONNECT << 16; } break; case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ break; case CMD_DATA_OVERRUN: dev_warn(&h->pdev->dev, "cp %p has" " completed with data overrun " "reported\n", cp); break; case CMD_INVALID: { /* print_bytes(cp, sizeof(*cp), 1, 0); print_cmd(cp); */ /* We get CMD_INVALID if you address a non-existent device * instead of a selection timeout (no response). You will * see this if you yank out a drive, then try to access it. * This is kind of a shame because it means that any other * CMD_INVALID (e.g. driver bug) will get interpreted as a * missing target. */ cmd->result = DID_NO_CONNECT << 16; } break; case CMD_PROTOCOL_ERR: dev_warn(&h->pdev->dev, "cp %p has " "protocol error \n", cp); break; case CMD_HARDWARE_ERR: cmd->result = DID_ERROR << 16; dev_warn(&h->pdev->dev, "cp %p had hardware error\n", cp); break; case CMD_CONNECTION_LOST: cmd->result = DID_ERROR << 16; dev_warn(&h->pdev->dev, "cp %p had connection lost\n", cp); break; case CMD_ABORTED: cmd->result = DID_ABORT << 16; dev_warn(&h->pdev->dev, "cp %p was aborted with status 0x%x\n", cp, ei->ScsiStatus); break; case CMD_ABORT_FAILED: cmd->result = DID_ERROR << 16; dev_warn(&h->pdev->dev, "cp %p reports abort failed\n", cp); break; case CMD_UNSOLICITED_ABORT: cmd->result = DID_SOFT_ERROR << 16; /* retry the command */ dev_warn(&h->pdev->dev, "cp %p aborted due to an unsolicited " "abort\n", cp); break; case CMD_TIMEOUT: cmd->result = DID_TIME_OUT << 16; dev_warn(&h->pdev->dev, "cp %p timedout\n", cp); break; case CMD_UNABORTABLE: cmd->result = DID_ERROR << 16; dev_warn(&h->pdev->dev, "Command unabortable\n"); break; default: cmd->result = DID_ERROR << 16; dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n", cp, ei->CommandStatus); } cmd->scsi_done(cmd); cmd_free(h, cp); } static void hpsa_pci_unmap(struct pci_dev *pdev, struct CommandList *c, int sg_used, int data_direction) { int i; union u64bit addr64; for (i = 0; i < sg_used; i++) { addr64.val32.lower = c->SG[i].Addr.lower; addr64.val32.upper = c->SG[i].Addr.upper; pci_unmap_single(pdev, (dma_addr_t) addr64.val, c->SG[i].Len, data_direction); } } static void hpsa_map_one(struct pci_dev *pdev, struct CommandList *cp, unsigned char *buf, size_t buflen, int data_direction) { u64 addr64; if (buflen == 0 || data_direction == PCI_DMA_NONE) { cp->Header.SGList = 0; cp->Header.SGTotal = 0; return; } addr64 = (u64) pci_map_single(pdev, buf, buflen, data_direction); cp->SG[0].Addr.lower = (u32) (addr64 & (u64) 0x00000000FFFFFFFF); cp->SG[0].Addr.upper = (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF); cp->SG[0].Len = buflen; cp->Header.SGList = (u8) 1; /* no. SGs contig in this cmd */ cp->Header.SGTotal = (u16) 1; /* total sgs in this cmd list */ } static inline void hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h, struct CommandList *c) { DECLARE_COMPLETION_ONSTACK(wait); c->waiting = &wait; enqueue_cmd_and_start_io(h, c); wait_for_completion(&wait); } static void hpsa_scsi_do_simple_cmd_core_if_no_lockup(struct ctlr_info *h, struct CommandList *c) { unsigned long flags; /* If controller lockup detected, fake a hardware error. */ spin_lock_irqsave(&h->lock, flags); if (unlikely(h->lockup_detected)) { spin_unlock_irqrestore(&h->lock, flags); c->err_info->CommandStatus = CMD_HARDWARE_ERR; } else { spin_unlock_irqrestore(&h->lock, flags); hpsa_scsi_do_simple_cmd_core(h, c); } } static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h, struct CommandList *c, int data_direction) { int retry_count = 0; do { memset(c->err_info, 0, sizeof(*c->err_info)); hpsa_scsi_do_simple_cmd_core(h, c); retry_count++; } while (check_for_unit_attention(h, c) && retry_count <= 3); hpsa_pci_unmap(h->pdev, c, 1, data_direction); } static void hpsa_scsi_interpret_error(struct CommandList *cp) { struct ErrorInfo *ei; struct device *d = &cp->h->pdev->dev; ei = cp->err_info; switch (ei->CommandStatus) { case CMD_TARGET_STATUS: dev_warn(d, "cmd %p has completed with errors\n", cp); dev_warn(d, "cmd %p has SCSI Status = %x\n", cp, ei->ScsiStatus); if (ei->ScsiStatus == 0) dev_warn(d, "SCSI status is abnormally zero. " "(probably indicates selection timeout " "reported incorrectly due to a known " "firmware bug, circa July, 2001.)\n"); break; case CMD_DATA_UNDERRUN: /* let mid layer handle it. */ dev_info(d, "UNDERRUN\n"); break; case CMD_DATA_OVERRUN: dev_warn(d, "cp %p has completed with data overrun\n", cp); break; case CMD_INVALID: { /* controller unfortunately reports SCSI passthru's * to non-existent targets as invalid commands. */ dev_warn(d, "cp %p is reported invalid (probably means " "target device no longer present)\n", cp); /* print_bytes((unsigned char *) cp, sizeof(*cp), 1, 0); print_cmd(cp); */ } break; case CMD_PROTOCOL_ERR: dev_warn(d, "cp %p has protocol error \n", cp); break; case CMD_HARDWARE_ERR: /* cmd->result = DID_ERROR << 16; */ dev_warn(d, "cp %p had hardware error\n", cp); break; case CMD_CONNECTION_LOST: dev_warn(d, "cp %p had connection lost\n", cp); break; case CMD_ABORTED: dev_warn(d, "cp %p was aborted\n", cp); break; case CMD_ABORT_FAILED: dev_warn(d, "cp %p reports abort failed\n", cp); break; case CMD_UNSOLICITED_ABORT: dev_warn(d, "cp %p aborted due to an unsolicited abort\n", cp); break; case CMD_TIMEOUT: dev_warn(d, "cp %p timed out\n", cp); break; case CMD_UNABORTABLE: dev_warn(d, "Command unabortable\n"); break; default: dev_warn(d, "cp %p returned unknown status %x\n", cp, ei->CommandStatus); } } static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr, unsigned char page, unsigned char *buf, unsigned char bufsize) { int rc = IO_OK; struct CommandList *c; struct ErrorInfo *ei; c = cmd_special_alloc(h); if (c == NULL) { /* trouble... */ dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n"); return -ENOMEM; } fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize, page, scsi3addr, TYPE_CMD); hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE); ei = c->err_info; if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) { hpsa_scsi_interpret_error(c); rc = -1; } cmd_special_free(h, c); return rc; } static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr) { int rc = IO_OK; struct CommandList *c; struct ErrorInfo *ei; c = cmd_special_alloc(h); if (c == NULL) { /* trouble... */ dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n"); return -ENOMEM; } fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, scsi3addr, TYPE_MSG); hpsa_scsi_do_simple_cmd_core(h, c); /* no unmap needed here because no data xfer. */ ei = c->err_info; if (ei->CommandStatus != 0) { hpsa_scsi_interpret_error(c); rc = -1; } cmd_special_free(h, c); return rc; } static void hpsa_get_raid_level(struct ctlr_info *h, unsigned char *scsi3addr, unsigned char *raid_level) { int rc; unsigned char *buf; *raid_level = RAID_UNKNOWN; buf = kzalloc(64, GFP_KERNEL); if (!buf) return; rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0xC1, buf, 64); if (rc == 0) *raid_level = buf[8]; if (*raid_level > RAID_UNKNOWN) *raid_level = RAID_UNKNOWN; kfree(buf); return; } /* Get the device id from inquiry page 0x83 */ static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr, unsigned char *device_id, int buflen) { int rc; unsigned char *buf; if (buflen > 16) buflen = 16; buf = kzalloc(64, GFP_KERNEL); if (!buf) return -1; rc = hpsa_scsi_do_inquiry(h, scsi3addr, 0x83, buf, 64); if (rc == 0) memcpy(device_id, &buf[8], buflen); kfree(buf); return rc != 0; } static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical, struct ReportLUNdata *buf, int bufsize, int extended_response) { int rc = IO_OK; struct CommandList *c; unsigned char scsi3addr[8]; struct ErrorInfo *ei; c = cmd_special_alloc(h); if (c == NULL) { /* trouble... */ dev_err(&h->pdev->dev, "cmd_special_alloc returned NULL!\n"); return -1; } /* address the controller */ memset(scsi3addr, 0, sizeof(scsi3addr)); fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h, buf, bufsize, 0, scsi3addr, TYPE_CMD); if (extended_response) c->Request.CDB[1] = extended_response; hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE); ei = c->err_info; if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) { hpsa_scsi_interpret_error(c); rc = -1; } cmd_special_free(h, c); return rc; } static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h, struct ReportLUNdata *buf, int bufsize, int extended_response) { return hpsa_scsi_do_report_luns(h, 0, buf, bufsize, extended_response); } static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h, struct ReportLUNdata *buf, int bufsize) { return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0); } static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device, int bus, int target, int lun) { device->bus = bus; device->target = target; device->lun = lun; } static int hpsa_update_device_info(struct ctlr_info *h, unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device, unsigned char *is_OBDR_device) { #define OBDR_SIG_OFFSET 43 #define OBDR_TAPE_SIG "$DR-10" #define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1) #define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN) unsigned char *inq_buff; unsigned char *obdr_sig; inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL); if (!inq_buff) goto bail_out; /* Do an inquiry to the device to see what it is. */ if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff, (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) { /* Inquiry failed (msg printed already) */ dev_err(&h->pdev->dev, "hpsa_update_device_info: inquiry failed\n"); goto bail_out; } this_device->devtype = (inq_buff[0] & 0x1f); memcpy(this_device->scsi3addr, scsi3addr, 8); memcpy(this_device->vendor, &inq_buff[8], sizeof(this_device->vendor)); memcpy(this_device->model, &inq_buff[16], sizeof(this_device->model)); memset(this_device->device_id, 0, sizeof(this_device->device_id)); hpsa_get_device_id(h, scsi3addr, this_device->device_id, sizeof(this_device->device_id)); if (this_device->devtype == TYPE_DISK && is_logical_dev_addr_mode(scsi3addr)) hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level); else this_device->raid_level = RAID_UNKNOWN; if (is_OBDR_device) { /* See if this is a One-Button-Disaster-Recovery device * by looking for "$DR-10" at offset 43 in inquiry data. */ obdr_sig = &inq_buff[OBDR_SIG_OFFSET]; *is_OBDR_device = (this_device->devtype == TYPE_ROM && strncmp(obdr_sig, OBDR_TAPE_SIG, OBDR_SIG_LEN) == 0); } kfree(inq_buff); return 0; bail_out: kfree(inq_buff); return 1; } static unsigned char *ext_target_model[] = { "MSA2012", "MSA2024", "MSA2312", "MSA2324", "P2000 G3 SAS", NULL, }; static int is_ext_target(struct ctlr_info *h, struct hpsa_scsi_dev_t *device) { int i; for (i = 0; ext_target_model[i]; i++) if (strncmp(device->model, ext_target_model[i], strlen(ext_target_model[i])) == 0) return 1; return 0; } /* Helper function to assign bus, target, lun mapping of devices. * Puts non-external target logical volumes on bus 0, external target logical * volumes on bus 1, physical devices on bus 2. and the hba on bus 3. * Logical drive target and lun are assigned at this time, but * physical device lun and target assignment are deferred (assigned * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.) */ static void figure_bus_target_lun(struct ctlr_info *h, u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device) { u32 lunid = le32_to_cpu(*((__le32 *) lunaddrbytes)); if (!is_logical_dev_addr_mode(lunaddrbytes)) { /* physical device, target and lun filled in later */ if (is_hba_lunid(lunaddrbytes)) hpsa_set_bus_target_lun(device, 3, 0, lunid & 0x3fff); else /* defer target, lun assignment for physical devices */ hpsa_set_bus_target_lun(device, 2, -1, -1); return; } /* It's a logical device */ if (is_ext_target(h, device)) { /* external target way, put logicals on bus 1 * and match target/lun numbers box * reports, other smart array, bus 0, target 0, match lunid */ hpsa_set_bus_target_lun(device, 1, (lunid >> 16) & 0x3fff, lunid & 0x00ff); return; } hpsa_set_bus_target_lun(device, 0, 0, lunid & 0x3fff); } /* * If there is no lun 0 on a target, linux won't find any devices. * For the external targets (arrays), we have to manually detect the enclosure * which is at lun zero, as CCISS_REPORT_PHYSICAL_LUNS doesn't report * it for some reason. *tmpdevice is the target we're adding, * this_device is a pointer into the current element of currentsd[] * that we're building up in update_scsi_devices(), below. * lunzerobits is a bitmap that tracks which targets already have a * lun 0 assigned. * Returns 1 if an enclosure was added, 0 if not. */ static int add_ext_target_dev(struct ctlr_info *h, struct hpsa_scsi_dev_t *tmpdevice, struct hpsa_scsi_dev_t *this_device, u8 *lunaddrbytes, unsigned long lunzerobits[], int *n_ext_target_devs) { unsigned char scsi3addr[8]; if (test_bit(tmpdevice->target, lunzerobits)) return 0; /* There is already a lun 0 on this target. */ if (!is_logical_dev_addr_mode(lunaddrbytes)) return 0; /* It's the logical targets that may lack lun 0. */ if (!is_ext_target(h, tmpdevice)) return 0; /* Only external target devices have this problem. */ if (tmpdevice->lun == 0) /* if lun is 0, then we have a lun 0. */ return 0; memset(scsi3addr, 0, 8); scsi3addr[3] = tmpdevice->target; if (is_hba_lunid(scsi3addr)) return 0; /* Don't add the RAID controller here. */ if (is_scsi_rev_5(h)) return 0; /* p1210m doesn't need to do this. */ if (*n_ext_target_devs >= MAX_EXT_TARGETS) { dev_warn(&h->pdev->dev, "Maximum number of external " "target devices exceeded. Check your hardware " "configuration."); return 0; } if (hpsa_update_device_info(h, scsi3addr, this_device, NULL)) return 0; (*n_ext_target_devs)++; hpsa_set_bus_target_lun(this_device, tmpdevice->bus, tmpdevice->target, 0); set_bit(tmpdevice->target, lunzerobits); return 1; } /* * Do CISS_REPORT_PHYS and CISS_REPORT_LOG. Data is returned in physdev, * logdev. The number of luns in physdev and logdev are returned in * *nphysicals and *nlogicals, respectively. * Returns 0 on success, -1 otherwise. */ static int hpsa_gather_lun_info(struct ctlr_info *h, int reportlunsize, struct ReportLUNdata *physdev, u32 *nphysicals, struct ReportLUNdata *logdev, u32 *nlogicals) { if (hpsa_scsi_do_report_phys_luns(h, physdev, reportlunsize, 0)) { dev_err(&h->pdev->dev, "report physical LUNs failed.\n"); return -1; } *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 8; if (*nphysicals > HPSA_MAX_PHYS_LUN) { dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded." " %d LUNs ignored.\n", HPSA_MAX_PHYS_LUN, *nphysicals - HPSA_MAX_PHYS_LUN); *nphysicals = HPSA_MAX_PHYS_LUN; } if (hpsa_scsi_do_report_log_luns(h, logdev, reportlunsize)) { dev_err(&h->pdev->dev, "report logical LUNs failed.\n"); return -1; } *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8; /* Reject Logicals in excess of our max capability. */ if (*nlogicals > HPSA_MAX_LUN) { dev_warn(&h->pdev->dev, "maximum logical LUNs (%d) exceeded. " "%d LUNs ignored.\n", HPSA_MAX_LUN, *nlogicals - HPSA_MAX_LUN); *nlogicals = HPSA_MAX_LUN; } if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) { dev_warn(&h->pdev->dev, "maximum logical + physical LUNs (%d) exceeded. " "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN, *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN); *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals; } return 0; } u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position, int i, int nphysicals, int nlogicals, struct ReportLUNdata *physdev_list, struct ReportLUNdata *logdev_list) { /* Helper function, figure out where the LUN ID info is coming from * given index i, lists of physical and logical devices, where in * the list the raid controller is supposed to appear (first or last) */ int logicals_start = nphysicals + (raid_ctlr_position == 0); int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0); if (i == raid_ctlr_position) return RAID_CTLR_LUNID; if (i < logicals_start) return &physdev_list->LUN[i - (raid_ctlr_position == 0)][0]; if (i < last_device) return &logdev_list->LUN[i - nphysicals - (raid_ctlr_position == 0)][0]; BUG(); return NULL; } static void hpsa_update_scsi_devices(struct ctlr_info *h, int hostno) { /* the idea here is we could get notified * that some devices have changed, so we do a report * physical luns and report logical luns cmd, and adjust * our list of devices accordingly. * * The scsi3addr's of devices won't change so long as the * adapter is not reset. That means we can rescan and * tell which devices we already know about, vs. new * devices, vs. disappearing devices. */ struct ReportLUNdata *physdev_list = NULL; struct ReportLUNdata *logdev_list = NULL; u32 nphysicals = 0; u32 nlogicals = 0; u32 ndev_allocated = 0; struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice; int ncurrent = 0; int reportlunsize = sizeof(*physdev_list) + HPSA_MAX_PHYS_LUN * 8; int i, n_ext_target_devs, ndevs_to_allocate; int raid_ctlr_position; DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS); currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_DEVICES, GFP_KERNEL); physdev_list = kzalloc(reportlunsize, GFP_KERNEL); logdev_list = kzalloc(reportlunsize, GFP_KERNEL); tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL); if (!currentsd || !physdev_list || !logdev_list || !tmpdevice) { dev_err(&h->pdev->dev, "out of memory\n"); goto out; } memset(lunzerobits, 0, sizeof(lunzerobits)); if (hpsa_gather_lun_info(h, reportlunsize, physdev_list, &nphysicals, logdev_list, &nlogicals)) goto out; /* We might see up to the maximum number of logical and physical disks * plus external target devices, and a device for the local RAID * controller. */ ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1; /* Allocate the per device structures */ for (i = 0; i < ndevs_to_allocate; i++) { if (i >= HPSA_MAX_DEVICES) { dev_warn(&h->pdev->dev, "maximum devices (%d) exceeded." " %d devices ignored.\n", HPSA_MAX_DEVICES, ndevs_to_allocate - HPSA_MAX_DEVICES); break; } currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL); if (!currentsd[i]) { dev_warn(&h->pdev->dev, "out of memory at %s:%d\n", __FILE__, __LINE__); goto out; } ndev_allocated++; } if (unlikely(is_scsi_rev_5(h))) raid_ctlr_position = 0; else raid_ctlr_position = nphysicals + nlogicals; /* adjust our table of devices */ n_ext_target_devs = 0; for (i = 0; i < nphysicals + nlogicals + 1; i++) { u8 *lunaddrbytes, is_OBDR = 0; /* Figure out where the LUN ID info is coming from */ lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position, i, nphysicals, nlogicals, physdev_list, logdev_list); /* skip masked physical devices. */ if (lunaddrbytes[3] & 0xC0 && i < nphysicals + (raid_ctlr_position == 0)) continue; /* Get device type, vendor, model, device id */ if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice, &is_OBDR)) continue; /* skip it if we can't talk to it. */ figure_bus_target_lun(h, lunaddrbytes, tmpdevice); this_device = currentsd[ncurrent]; /* * For external target devices, we have to insert a LUN 0 which * doesn't show up in CCISS_REPORT_PHYSICAL data, but there * is nonetheless an enclosure device there. We have to * present that otherwise linux won't find anything if * there is no lun 0. */ if (add_ext_target_dev(h, tmpdevice, this_device, lunaddrbytes, lunzerobits, &n_ext_target_devs)) { ncurrent++; this_device = currentsd[ncurrent]; } *this_device = *tmpdevice; switch (this_device->devtype) { case TYPE_ROM: /* We don't *really* support actual CD-ROM devices, * just "One Button Disaster Recovery" tape drive * which temporarily pretends to be a CD-ROM drive. * So we check that the device is really an OBDR tape * device by checking for "$DR-10" in bytes 43-48 of * the inquiry data. */ if (is_OBDR) ncurrent++; break; case TYPE_DISK: if (i < nphysicals) break; ncurrent++; break; case TYPE_TAPE: case TYPE_MEDIUM_CHANGER: ncurrent++; break; case TYPE_RAID: /* Only present the Smartarray HBA as a RAID controller. * If it's a RAID controller other than the HBA itself * (an external RAID controller, MSA500 or similar) * don't present it. */ if (!is_hba_lunid(lunaddrbytes)) break; ncurrent++; break; default: break; } if (ncurrent >= HPSA_MAX_DEVICES) break; } adjust_hpsa_scsi_table(h, hostno, currentsd, ncurrent); out: kfree(tmpdevice); for (i = 0; i < ndev_allocated; i++) kfree(currentsd[i]); kfree(currentsd); kfree(physdev_list); kfree(logdev_list); } /* hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci * dma mapping and fills in the scatter gather entries of the * hpsa command, cp. */ static int hpsa_scatter_gather(struct ctlr_info *h, struct CommandList *cp, struct scsi_cmnd *cmd) { unsigned int len; struct scatterlist *sg; u64 addr64; int use_sg, i, sg_index, chained; struct SGDescriptor *curr_sg; BUG_ON(scsi_sg_count(cmd) > h->maxsgentries); use_sg = scsi_dma_map(cmd); if (use_sg < 0) return use_sg; if (!use_sg) goto sglist_finished; curr_sg = cp->SG; chained = 0; sg_index = 0; scsi_for_each_sg(cmd, sg, use_sg, i) { if (i == h->max_cmd_sg_entries - 1 && use_sg > h->max_cmd_sg_entries) { chained = 1; curr_sg = h->cmd_sg_list[cp->cmdindex]; sg_index = 0; } addr64 = (u64) sg_dma_address(sg); len = sg_dma_len(sg); curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL); curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL); curr_sg->Len = len; curr_sg->Ext = 0; /* we are not chaining */ curr_sg++; } if (use_sg + chained > h->maxSG) h->maxSG = use_sg + chained; if (chained) { cp->Header.SGList = h->max_cmd_sg_entries; cp->Header.SGTotal = (u16) (use_sg + 1); hpsa_map_sg_chain_block(h, cp); return 0; } sglist_finished: cp->Header.SGList = (u8) use_sg; /* no. SGs contig in this cmd */ cp->Header.SGTotal = (u16) use_sg; /* total sgs in this cmd list */ return 0; } static int hpsa_scsi_queue_command_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) { struct ctlr_info *h; struct hpsa_scsi_dev_t *dev; unsigned char scsi3addr[8]; struct CommandList *c; unsigned long flags; /* Get the ptr to our adapter structure out of cmd->host. */ h = sdev_to_hba(cmd->device); dev = cmd->device->hostdata; if (!dev) { cmd->result = DID_NO_CONNECT << 16; done(cmd); return 0; } memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr)); spin_lock_irqsave(&h->lock, flags); if (unlikely(h->lockup_detected)) { spin_unlock_irqrestore(&h->lock, flags); cmd->result = DID_ERROR << 16; done(cmd); return 0; } /* Need a lock as this is being allocated from the pool */ c = cmd_alloc(h); spin_unlock_irqrestore(&h->lock, flags); if (c == NULL) { /* trouble... */ dev_err(&h->pdev->dev, "cmd_alloc returned NULL!\n"); return SCSI_MLQUEUE_HOST_BUSY; } /* Fill in the command list header */ cmd->scsi_done = done; /* save this for use by completion code */ /* save c in case we have to abort it */ cmd->host_scribble = (unsigned char *) c; c->cmd_type = CMD_SCSI; c->scsi_cmd = cmd; c->Header.ReplyQueue = 0; /* unused in simple mode */ memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8); c->Header.Tag.lower = (c->cmdindex << DIRECT_LOOKUP_SHIFT); c->Header.Tag.lower |= DIRECT_LOOKUP_BIT; /* Fill in the request block... */ c->Request.Timeout = 0; memset(c->Request.CDB, 0, sizeof(c->Request.CDB)); BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB)); c->Request.CDBLen = cmd->cmd_len; memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len); c->Request.Type.Type = TYPE_CMD; c->Request.Type.Attribute = ATTR_SIMPLE; switch (cmd->sc_data_direction) { case DMA_TO_DEVICE: c->Request.Type.Direction = XFER_WRITE; break; case DMA_FROM_DEVICE: c->Request.Type.Direction = XFER_READ; break; case DMA_NONE: c->Request.Type.Direction = XFER_NONE; break; case DMA_BIDIRECTIONAL: /* This can happen if a buggy application does a scsi passthru * and sets both inlen and outlen to non-zero. ( see * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() ) */ c->Request.Type.Direction = XFER_RSVD; /* This is technically wrong, and hpsa controllers should * reject it with CMD_INVALID, which is the most correct * response, but non-fibre backends appear to let it * slide by, and give the same results as if this field * were set correctly. Either way is acceptable for * our purposes here. */ break; default: dev_err(&h->pdev->dev, "unknown data direction: %d\n", cmd->sc_data_direction); BUG(); break; } if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */ cmd_free(h, c); return SCSI_MLQUEUE_HOST_BUSY; } enqueue_cmd_and_start_io(h, c); /* the cmd'll come back via intr handler in complete_scsi_command() */ return 0; } static DEF_SCSI_QCMD(hpsa_scsi_queue_command) static void hpsa_scan_start(struct Scsi_Host *sh) { struct ctlr_info *h = shost_to_hba(sh); unsigned long flags; /* wait until any scan already in progress is finished. */ while (1) { spin_lock_irqsave(&h->scan_lock, flags); if (h->scan_finished) break; spin_unlock_irqrestore(&h->scan_lock, flags); wait_event(h->scan_wait_queue, h->scan_finished); /* Note: We don't need to worry about a race between this * thread and driver unload because the midlayer will * have incremented the reference count, so unload won't * happen if we're in here. */ } h->scan_finished = 0; /* mark scan as in progress */ spin_unlock_irqrestore(&h->scan_lock, flags); hpsa_update_scsi_devices(h, h->scsi_host->host_no); spin_lock_irqsave(&h->scan_lock, flags); h->scan_finished = 1; /* mark scan as finished. */ wake_up_all(&h->scan_wait_queue); spin_unlock_irqrestore(&h->scan_lock, flags); } static int hpsa_scan_finished(struct Scsi_Host *sh, unsigned long elapsed_time) { struct ctlr_info *h = shost_to_hba(sh); unsigned long flags; int finished; spin_lock_irqsave(&h->scan_lock, flags); finished = h->scan_finished; spin_unlock_irqrestore(&h->scan_lock, flags); return finished; } static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason) { struct ctlr_info *h = sdev_to_hba(sdev); if (reason != SCSI_QDEPTH_DEFAULT) return -ENOTSUPP; if (qdepth < 1) qdepth = 1; else if (qdepth > h->nr_cmds) qdepth = h->nr_cmds; scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth); return sdev->queue_depth; } static void hpsa_unregister_scsi(struct ctlr_info *h) { /* we are being forcibly unloaded, and may not refuse. */ scsi_remove_host(h->scsi_host); scsi_host_put(h->scsi_host); h->scsi_host = NULL; } static int hpsa_register_scsi(struct ctlr_info *h) { struct Scsi_Host *sh; int error; sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h)); if (sh == NULL) goto fail; sh->io_port = 0; sh->n_io_port = 0; sh->this_id = -1; sh->max_channel = 3; sh->max_cmd_len = MAX_COMMAND_SIZE; sh->max_lun = HPSA_MAX_LUN; sh->max_id = HPSA_MAX_LUN; sh->can_queue = h->nr_cmds; sh->cmd_per_lun = h->nr_cmds; sh->sg_tablesize = h->maxsgentries; h->scsi_host = sh; sh->hostdata[0] = (unsigned long) h; sh->irq = h->intr[h->intr_mode]; sh->unique_id = sh->irq; error = scsi_add_host(sh, &h->pdev->dev); if (error) goto fail_host_put; scsi_scan_host(sh); return 0; fail_host_put: dev_err(&h->pdev->dev, "%s: scsi_add_host" " failed for controller %d\n", __func__, h->ctlr); scsi_host_put(sh); return error; fail: dev_err(&h->pdev->dev, "%s: scsi_host_alloc" " failed for controller %d\n", __func__, h->ctlr); return -ENOMEM; } static int wait_for_device_to_become_ready(struct ctlr_info *h, unsigned char lunaddr[]) { int rc = 0; int count = 0; int waittime = 1; /* seconds */ struct CommandList *c; c = cmd_special_alloc(h); if (!c) { dev_warn(&h->pdev->dev, "out of memory in " "wait_for_device_to_become_ready.\n"); return IO_ERROR; } /* Send test unit ready until device ready, or give up. */ while (count < HPSA_TUR_RETRY_LIMIT) { /* Wait for a bit. do this first, because if we send * the TUR right away, the reset will just abort it. */ msleep(1000 * waittime); count++; /* Increase wait time with each try, up to a point. */ if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS) waittime = waittime * 2; /* Send the Test Unit Ready */ fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, lunaddr, TYPE_CMD); hpsa_scsi_do_simple_cmd_core(h, c); /* no unmap needed here because no data xfer. */ if (c->err_info->CommandStatus == CMD_SUCCESS) break; if (c->err_info->CommandStatus == CMD_TARGET_STATUS && c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION && (c->err_info->SenseInfo[2] == NO_SENSE || c->err_info->SenseInfo[2] == UNIT_ATTENTION)) break; dev_warn(&h->pdev->dev, "waiting %d secs " "for device to become ready.\n", waittime); rc = 1; /* device not ready. */ } if (rc) dev_warn(&h->pdev->dev, "giving up on device.\n"); else dev_warn(&h->pdev->dev, "device is ready.\n"); cmd_special_free(h, c); return rc; } /* Need at least one of these error handlers to keep ../scsi/hosts.c from * complaining. Doing a host- or bus-reset can't do anything good here. */ static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd) { int rc; struct ctlr_info *h; struct hpsa_scsi_dev_t *dev; /* find the controller to which the command to be aborted was sent */ h = sdev_to_hba(scsicmd->device); if (h == NULL) /* paranoia */ return FAILED; dev = scsicmd->device->hostdata; if (!dev) { dev_err(&h->pdev->dev, "hpsa_eh_device_reset_handler: " "device lookup failed.\n"); return FAILED; } dev_warn(&h->pdev->dev, "resetting device %d:%d:%d:%d\n", h->scsi_host->host_no, dev->bus, dev->target, dev->lun); /* send a reset to the SCSI LUN which the command was sent to */ rc = hpsa_send_reset(h, dev->scsi3addr); if (rc == 0 && wait_for_device_to_become_ready(h, dev->scsi3addr) == 0) return SUCCESS; dev_warn(&h->pdev->dev, "resetting device failed.\n"); return FAILED; } /* * For operations that cannot sleep, a command block is allocated at init, * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track * which ones are free or in use. Lock must be held when calling this. * cmd_free() is the complement. */ static struct CommandList *cmd_alloc(struct ctlr_info *h) { struct CommandList *c; int i; union u64bit temp64; dma_addr_t cmd_dma_handle, err_dma_handle; do { i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds); if (i == h->nr_cmds) return NULL; } while (test_and_set_bit (i & (BITS_PER_LONG - 1), h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0); c = h->cmd_pool + i; memset(c, 0, sizeof(*c)); cmd_dma_handle = h->cmd_pool_dhandle + i * sizeof(*c); c->err_info = h->errinfo_pool + i; memset(c->err_info, 0, sizeof(*c->err_info)); err_dma_handle = h->errinfo_pool_dhandle + i * sizeof(*c->err_info); h->nr_allocs++; c->cmdindex = i; INIT_LIST_HEAD(&c->list); c->busaddr = (u32) cmd_dma_handle; temp64.val = (u64) err_dma_handle; c->ErrDesc.Addr.lower = temp64.val32.lower; c->ErrDesc.Addr.upper = temp64.val32.upper; c->ErrDesc.Len = sizeof(*c->err_info); c->h = h; return c; } /* For operations that can wait for kmalloc to possibly sleep, * this routine can be called. Lock need not be held to call * cmd_special_alloc. cmd_special_free() is the complement. */ static struct CommandList *cmd_special_alloc(struct ctlr_info *h) { struct CommandList *c; union u64bit temp64; dma_addr_t cmd_dma_handle, err_dma_handle; c = pci_alloc_consistent(h->pdev, sizeof(*c), &cmd_dma_handle); if (c == NULL) return NULL; memset(c, 0, sizeof(*c)); c->cmdindex = -1; c->err_info = pci_alloc_consistent(h->pdev, sizeof(*c->err_info), &err_dma_handle); if (c->err_info == NULL) { pci_free_consistent(h->pdev, sizeof(*c), c, cmd_dma_handle); return NULL; } memset(c->err_info, 0, sizeof(*c->err_info)); INIT_LIST_HEAD(&c->list); c->busaddr = (u32) cmd_dma_handle; temp64.val = (u64) err_dma_handle; c->ErrDesc.Addr.lower = temp64.val32.lower; c->ErrDesc.Addr.upper = temp64.val32.upper; c->ErrDesc.Len = sizeof(*c->err_info); c->h = h; return c; } static void cmd_free(struct ctlr_info *h, struct CommandList *c) { int i; i = c - h->cmd_pool; clear_bit(i & (BITS_PER_LONG - 1), h->cmd_pool_bits + (i / BITS_PER_LONG)); h->nr_frees++; } static void cmd_special_free(struct ctlr_info *h, struct CommandList *c) { union u64bit temp64; temp64.val32.lower = c->ErrDesc.Addr.lower; temp64.val32.upper = c->ErrDesc.Addr.upper; pci_free_consistent(h->pdev, sizeof(*c->err_info), c->err_info, (dma_addr_t) temp64.val); pci_free_consistent(h->pdev, sizeof(*c), c, (dma_addr_t) (c->busaddr & DIRECT_LOOKUP_MASK)); } #ifdef CONFIG_COMPAT static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd, void *arg) { IOCTL32_Command_struct __user *arg32 = (IOCTL32_Command_struct __user *) arg; IOCTL_Command_struct arg64; IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64)); int err; u32 cp; memset(&arg64, 0, sizeof(arg64)); err = 0; err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info, sizeof(arg64.LUN_info)); err |= copy_from_user(&arg64.Request, &arg32->Request, sizeof(arg64.Request)); err |= copy_from_user(&arg64.error_info, &arg32->error_info, sizeof(arg64.error_info)); err |= get_user(arg64.buf_size, &arg32->buf_size); err |= get_user(cp, &arg32->buf); arg64.buf = compat_ptr(cp); err |= copy_to_user(p, &arg64, sizeof(arg64)); if (err) return -EFAULT; err = hpsa_ioctl(dev, CCISS_PASSTHRU, (void *)p); if (err) return err; err |= copy_in_user(&arg32->error_info, &p->error_info, sizeof(arg32->error_info)); if (err) return -EFAULT; return err; } static int hpsa_ioctl32_big_passthru(struct scsi_device *dev, int cmd, void *arg) { BIG_IOCTL32_Command_struct __user *arg32 = (BIG_IOCTL32_Command_struct __user *) arg; BIG_IOCTL_Command_struct arg64; BIG_IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64)); int err; u32 cp; memset(&arg64, 0, sizeof(arg64)); err = 0; err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info, sizeof(arg64.LUN_info)); err |= copy_from_user(&arg64.Request, &arg32->Request, sizeof(arg64.Request)); err |= copy_from_user(&arg64.error_info, &arg32->error_info, sizeof(arg64.error_info)); err |= get_user(arg64.buf_size, &arg32->buf_size); err |= get_user(arg64.malloc_size, &arg32->malloc_size); err |= get_user(cp, &arg32->buf); arg64.buf = compat_ptr(cp); err |= copy_to_user(p, &arg64, sizeof(arg64)); if (err) return -EFAULT; err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, (void *)p); if (err) return err; err |= copy_in_user(&arg32->error_info, &p->error_info, sizeof(arg32->error_info)); if (err) return -EFAULT; return err; } static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg) { switch (cmd) { case CCISS_GETPCIINFO: case CCISS_GETINTINFO: case CCISS_SETINTINFO: case CCISS_GETNODENAME: case CCISS_SETNODENAME: case CCISS_GETHEARTBEAT: case CCISS_GETBUSTYPES: case CCISS_GETFIRMVER: case CCISS_GETDRIVVER: case CCISS_REVALIDVOLS: case CCISS_DEREGDISK: case CCISS_REGNEWDISK: case CCISS_REGNEWD: case CCISS_RESCANDISK: case CCISS_GETLUNINFO: return hpsa_ioctl(dev, cmd, arg); case CCISS_PASSTHRU32: return hpsa_ioctl32_passthru(dev, cmd, arg); case CCISS_BIG_PASSTHRU32: return hpsa_ioctl32_big_passthru(dev, cmd, arg); default: return -ENOIOCTLCMD; } } #endif static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp) { struct hpsa_pci_info pciinfo; if (!argp) return -EINVAL; pciinfo.domain = pci_domain_nr(h->pdev->bus); pciinfo.bus = h->pdev->bus->number; pciinfo.dev_fn = h->pdev->devfn; pciinfo.board_id = h->board_id; if (copy_to_user(argp, &pciinfo, sizeof(pciinfo))) return -EFAULT; return 0; } static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp) { DriverVer_type DriverVer; unsigned char vmaj, vmin, vsubmin; int rc; rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu", &vmaj, &vmin, &vsubmin); if (rc != 3) { dev_info(&h->pdev->dev, "driver version string '%s' " "unrecognized.", HPSA_DRIVER_VERSION); vmaj = 0; vmin = 0; vsubmin = 0; } DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin; if (!argp) return -EINVAL; if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type))) return -EFAULT; return 0; } static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp) { IOCTL_Command_struct iocommand; struct CommandList *c; char *buff = NULL; union u64bit temp64; if (!argp) return -EINVAL; if (!capable(CAP_SYS_RAWIO)) return -EPERM; if (copy_from_user(&iocommand, argp, sizeof(iocommand))) return -EFAULT; if ((iocommand.buf_size < 1) && (iocommand.Request.Type.Direction != XFER_NONE)) { return -EINVAL; } if (iocommand.buf_size > 0) { buff = kmalloc(iocommand.buf_size, GFP_KERNEL); if (buff == NULL) return -EFAULT; if (iocommand.Request.Type.Direction == XFER_WRITE) { /* Copy the data into the buffer we created */ if (copy_from_user(buff, iocommand.buf, iocommand.buf_size)) { kfree(buff); return -EFAULT; } } else { memset(buff, 0, iocommand.buf_size); } } c = cmd_special_alloc(h); if (c == NULL) { kfree(buff); return -ENOMEM; } /* Fill in the command type */ c->cmd_type = CMD_IOCTL_PEND; /* Fill in Command Header */ c->Header.ReplyQueue = 0; /* unused in simple mode */ if (iocommand.buf_size > 0) { /* buffer to fill */ c->Header.SGList = 1; c->Header.SGTotal = 1; } else { /* no buffers to fill */ c->Header.SGList = 0; c->Header.SGTotal = 0; } memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN)); /* use the kernel address the cmd block for tag */ c->Header.Tag.lower = c->busaddr; /* Fill in Request block */ memcpy(&c->Request, &iocommand.Request, sizeof(c->Request)); /* Fill in the scatter gather information */ if (iocommand.buf_size > 0) { temp64.val = pci_map_single(h->pdev, buff, iocommand.buf_size, PCI_DMA_BIDIRECTIONAL); c->SG[0].Addr.lower = temp64.val32.lower; c->SG[0].Addr.upper = temp64.val32.upper; c->SG[0].Len = iocommand.buf_size; c->SG[0].Ext = 0; /* we are not chaining*/ } hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c); if (iocommand.buf_size > 0) hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL); check_ioctl_unit_attention(h, c); /* Copy the error information out */ memcpy(&iocommand.error_info, c->err_info, sizeof(iocommand.error_info)); if (copy_to_user(argp, &iocommand, sizeof(iocommand))) { kfree(buff); cmd_special_free(h, c); return -EFAULT; } if (iocommand.Request.Type.Direction == XFER_READ && iocommand.buf_size > 0) { /* Copy the data out of the buffer we created */ if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) { kfree(buff); cmd_special_free(h, c); return -EFAULT; } } kfree(buff); cmd_special_free(h, c); return 0; } static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp) { BIG_IOCTL_Command_struct *ioc; struct CommandList *c; unsigned char **buff = NULL; int *buff_size = NULL; union u64bit temp64; BYTE sg_used = 0; int status = 0; int i; u32 left; u32 sz; BYTE __user *data_ptr; if (!argp) return -EINVAL; if (!capable(CAP_SYS_RAWIO)) return -EPERM; ioc = (BIG_IOCTL_Command_struct *) kmalloc(sizeof(*ioc), GFP_KERNEL); if (!ioc) { status = -ENOMEM; goto cleanup1; } if (copy_from_user(ioc, argp, sizeof(*ioc))) { status = -EFAULT; goto cleanup1; } if ((ioc->buf_size < 1) && (ioc->Request.Type.Direction != XFER_NONE)) { status = -EINVAL; goto cleanup1; } /* Check kmalloc limits using all SGs */ if (ioc->malloc_size > MAX_KMALLOC_SIZE) { status = -EINVAL; goto cleanup1; } if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD) { status = -EINVAL; goto cleanup1; } buff = kzalloc(SG_ENTRIES_IN_CMD * sizeof(char *), GFP_KERNEL); if (!buff) { status = -ENOMEM; goto cleanup1; } buff_size = kmalloc(SG_ENTRIES_IN_CMD * sizeof(int), GFP_KERNEL); if (!buff_size) { status = -ENOMEM; goto cleanup1; } left = ioc->buf_size; data_ptr = ioc->buf; while (left) { sz = (left > ioc->malloc_size) ? ioc->malloc_size : left; buff_size[sg_used] = sz; buff[sg_used] = kmalloc(sz, GFP_KERNEL); if (buff[sg_used] == NULL) { status = -ENOMEM; goto cleanup1; } if (ioc->Request.Type.Direction == XFER_WRITE) { if (copy_from_user(buff[sg_used], data_ptr, sz)) { status = -ENOMEM; goto cleanup1; } } else memset(buff[sg_used], 0, sz); left -= sz; data_ptr += sz; sg_used++; } c = cmd_special_alloc(h); if (c == NULL) { status = -ENOMEM; goto cleanup1; } c->cmd_type = CMD_IOCTL_PEND; c->Header.ReplyQueue = 0; c->Header.SGList = c->Header.SGTotal = sg_used; memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN)); c->Header.Tag.lower = c->busaddr; memcpy(&c->Request, &ioc->Request, sizeof(c->Request)); if (ioc->buf_size > 0) { int i; for (i = 0; i < sg_used; i++) { temp64.val = pci_map_single(h->pdev, buff[i], buff_size[i], PCI_DMA_BIDIRECTIONAL); c->SG[i].Addr.lower = temp64.val32.lower; c->SG[i].Addr.upper = temp64.val32.upper; c->SG[i].Len = buff_size[i]; /* we are not chaining */ c->SG[i].Ext = 0; } } hpsa_scsi_do_simple_cmd_core_if_no_lockup(h, c); if (sg_used) hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL); check_ioctl_unit_attention(h, c); /* Copy the error information out */ memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info)); if (copy_to_user(argp, ioc, sizeof(*ioc))) { cmd_special_free(h, c); status = -EFAULT; goto cleanup1; } if (ioc->Request.Type.Direction == XFER_READ && ioc->buf_size > 0) { /* Copy the data out of the buffer we created */ BYTE __user *ptr = ioc->buf; for (i = 0; i < sg_used; i++) { if (copy_to_user(ptr, buff[i], buff_size[i])) { cmd_special_free(h, c); status = -EFAULT; goto cleanup1; } ptr += buff_size[i]; } } cmd_special_free(h, c); status = 0; cleanup1: if (buff) { for (i = 0; i < sg_used; i++) kfree(buff[i]); kfree(buff); } kfree(buff_size); kfree(ioc); return status; } static void check_ioctl_unit_attention(struct ctlr_info *h, struct CommandList *c) { if (c->err_info->CommandStatus == CMD_TARGET_STATUS && c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) (void) check_for_unit_attention(h, c); } /* * ioctl */ static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg) { struct ctlr_info *h; void __user *argp = (void __user *)arg; h = sdev_to_hba(dev); switch (cmd) { case CCISS_DEREGDISK: case CCISS_REGNEWDISK: case CCISS_REGNEWD: hpsa_scan_start(h->scsi_host); return 0; case CCISS_GETPCIINFO: return hpsa_getpciinfo_ioctl(h, argp); case CCISS_GETDRIVVER: return hpsa_getdrivver_ioctl(h, argp); case CCISS_PASSTHRU: return hpsa_passthru_ioctl(h, argp); case CCISS_BIG_PASSTHRU: return hpsa_big_passthru_ioctl(h, argp); default: return -ENOTTY; } } static int __devinit hpsa_send_host_reset(struct ctlr_info *h, unsigned char *scsi3addr, u8 reset_type) { struct CommandList *c; c = cmd_alloc(h); if (!c) return -ENOMEM; fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, RAID_CTLR_LUNID, TYPE_MSG); c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */ c->waiting = NULL; enqueue_cmd_and_start_io(h, c); /* Don't wait for completion, the reset won't complete. Don't free * the command either. This is the last command we will send before * re-initializing everything, so it doesn't matter and won't leak. */ return 0; } static void fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h, void *buff, size_t size, u8 page_code, unsigned char *scsi3addr, int cmd_type) { int pci_dir = XFER_NONE; c->cmd_type = CMD_IOCTL_PEND; c->Header.ReplyQueue = 0; if (buff != NULL && size > 0) { c->Header.SGList = 1; c->Header.SGTotal = 1; } else { c->Header.SGList = 0; c->Header.SGTotal = 0; } c->Header.Tag.lower = c->busaddr; memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8); c->Request.Type.Type = cmd_type; if (cmd_type == TYPE_CMD) { switch (cmd) { case HPSA_INQUIRY: /* are we trying to read a vital product page */ if (page_code != 0) { c->Request.CDB[1] = 0x01; c->Request.CDB[2] = page_code; } c->Request.CDBLen = 6; c->Request.Type.Attribute = ATTR_SIMPLE; c->Request.Type.Direction = XFER_READ; c->Request.Timeout = 0; c->Request.CDB[0] = HPSA_INQUIRY; c->Request.CDB[4] = size & 0xFF; break; case HPSA_REPORT_LOG: case HPSA_REPORT_PHYS: /* Talking to controller so It's a physical command mode = 00 target = 0. Nothing to write. */ c->Request.CDBLen = 12; c->Request.Type.Attribute = ATTR_SIMPLE; c->Request.Type.Direction = XFER_READ; c->Request.Timeout = 0; c->Request.CDB[0] = cmd; c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */ c->Request.CDB[7] = (size >> 16) & 0xFF; c->Request.CDB[8] = (size >> 8) & 0xFF; c->Request.CDB[9] = size & 0xFF; break; case HPSA_CACHE_FLUSH: c->Request.CDBLen = 12; c->Request.Type.Attribute = ATTR_SIMPLE; c->Request.Type.Direction = XFER_WRITE; c->Request.Timeout = 0; c->Request.CDB[0] = BMIC_WRITE; c->Request.CDB[6] = BMIC_CACHE_FLUSH; c->Request.CDB[7] = (size >> 8) & 0xFF; c->Request.CDB[8] = size & 0xFF; break; case TEST_UNIT_READY: c->Request.CDBLen = 6; c->Request.Type.Attribute = ATTR_SIMPLE; c->Request.Type.Direction = XFER_NONE; c->Request.Timeout = 0; break; default: dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd); BUG(); return; } } else if (cmd_type == TYPE_MSG) { switch (cmd) { case HPSA_DEVICE_RESET_MSG: c->Request.CDBLen = 16; c->Request.Type.Type = 1; /* It is a MSG not a CMD */ c->Request.Type.Attribute = ATTR_SIMPLE; c->Request.Type.Direction = XFER_NONE; c->Request.Timeout = 0; /* Don't time out */ memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB)); c->Request.CDB[0] = cmd; c->Request.CDB[1] = 0x03; /* Reset target above */ /* If bytes 4-7 are zero, it means reset the */ /* LunID device */ c->Request.CDB[4] = 0x00; c->Request.CDB[5] = 0x00; c->Request.CDB[6] = 0x00; c->Request.CDB[7] = 0x00; break; default: dev_warn(&h->pdev->dev, "unknown message type %d\n", cmd); BUG(); } } else { dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type); BUG(); } switch (c->Request.Type.Direction) { case XFER_READ: pci_dir = PCI_DMA_FROMDEVICE; break; case XFER_WRITE: pci_dir = PCI_DMA_TODEVICE; break; case XFER_NONE: pci_dir = PCI_DMA_NONE; break; default: pci_dir = PCI_DMA_BIDIRECTIONAL; } hpsa_map_one(h->pdev, c, buff, size, pci_dir); return; } /* * Map (physical) PCI mem into (virtual) kernel space */ static void __iomem *remap_pci_mem(ulong base, ulong size) { ulong page_base = ((ulong) base) & PAGE_MASK; ulong page_offs = ((ulong) base) - page_base; void __iomem *page_remapped = ioremap(page_base, page_offs + size); return page_remapped ? (page_remapped + page_offs) : NULL; } /* Takes cmds off the submission queue and sends them to the hardware, * then puts them on the queue of cmds waiting for completion. */ static void start_io(struct ctlr_info *h) { struct CommandList *c; while (!list_empty(&h->reqQ)) { c = list_entry(h->reqQ.next, struct CommandList, list); /* can't do anything if fifo is full */ if ((h->access.fifo_full(h))) { dev_warn(&h->pdev->dev, "fifo full\n"); break; } /* Get the first entry from the Request Q */ removeQ(c); h->Qdepth--; /* Tell the controller execute command */ h->access.submit_command(h, c); /* Put job onto the completed Q */ addQ(&h->cmpQ, c); } } static inline unsigned long get_next_completion(struct ctlr_info *h) { return h->access.command_completed(h); } static inline bool interrupt_pending(struct ctlr_info *h) { return h->access.intr_pending(h); } static inline long interrupt_not_for_us(struct ctlr_info *h) { return (h->access.intr_pending(h) == 0) || (h->interrupts_enabled == 0); } static inline int bad_tag(struct ctlr_info *h, u32 tag_index, u32 raw_tag) { if (unlikely(tag_index >= h->nr_cmds)) { dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag); return 1; } return 0; } static inline void finish_cmd(struct CommandList *c, u32 raw_tag) { removeQ(c); if (likely(c->cmd_type == CMD_SCSI)) complete_scsi_command(c); else if (c->cmd_type == CMD_IOCTL_PEND) complete(c->waiting); } static inline u32 hpsa_tag_contains_index(u32 tag) { return tag & DIRECT_LOOKUP_BIT; } static inline u32 hpsa_tag_to_index(u32 tag) { return tag >> DIRECT_LOOKUP_SHIFT; } static inline u32 hpsa_tag_discard_error_bits(struct ctlr_info *h, u32 tag) { #define HPSA_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1) #define HPSA_SIMPLE_ERROR_BITS 0x03 if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant))) return tag & ~HPSA_SIMPLE_ERROR_BITS; return tag & ~HPSA_PERF_ERROR_BITS; } /* process completion of an indexed ("direct lookup") command */ static inline u32 process_indexed_cmd(struct ctlr_info *h, u32 raw_tag) { u32 tag_index; struct CommandList *c; tag_index = hpsa_tag_to_index(raw_tag); if (bad_tag(h, tag_index, raw_tag)) return next_command(h); c = h->cmd_pool + tag_index; finish_cmd(c, raw_tag); return next_command(h); } /* process completion of a non-indexed command */ static inline u32 process_nonindexed_cmd(struct ctlr_info *h, u32 raw_tag) { u32 tag; struct CommandList *c = NULL; tag = hpsa_tag_discard_error_bits(h, raw_tag); list_for_each_entry(c, &h->cmpQ, list) { if ((c->busaddr & 0xFFFFFFE0) == (tag & 0xFFFFFFE0)) { finish_cmd(c, raw_tag); return next_command(h); } } bad_tag(h, h->nr_cmds + 1, raw_tag); return next_command(h); } /* Some controllers, like p400, will give us one interrupt * after a soft reset, even if we turned interrupts off. * Only need to check for this in the hpsa_xxx_discard_completions * functions. */ static int ignore_bogus_interrupt(struct ctlr_info *h) { if (likely(!reset_devices)) return 0; if (likely(h->interrupts_enabled)) return 0; dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled " "(known firmware bug.) Ignoring.\n"); return 1; } static irqreturn_t hpsa_intx_discard_completions(int irq, void *dev_id) { struct ctlr_info *h = dev_id; unsigned long flags; u32 raw_tag; if (ignore_bogus_interrupt(h)) return IRQ_NONE; if (interrupt_not_for_us(h)) return IRQ_NONE; spin_lock_irqsave(&h->lock, flags); h->last_intr_timestamp = get_jiffies_64(); while (interrupt_pending(h)) { raw_tag = get_next_completion(h); while (raw_tag != FIFO_EMPTY) raw_tag = next_command(h); } spin_unlock_irqrestore(&h->lock, flags); return IRQ_HANDLED; } static irqreturn_t hpsa_msix_discard_completions(int irq, void *dev_id) { struct ctlr_info *h = dev_id; unsigned long flags; u32 raw_tag; if (ignore_bogus_interrupt(h)) return IRQ_NONE; spin_lock_irqsave(&h->lock, flags); h->last_intr_timestamp = get_jiffies_64(); raw_tag = get_next_completion(h); while (raw_tag != FIFO_EMPTY) raw_tag = next_command(h); spin_unlock_irqrestore(&h->lock, flags); return IRQ_HANDLED; } static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id) { struct ctlr_info *h = dev_id; unsigned long flags; u32 raw_tag; if (interrupt_not_for_us(h)) return IRQ_NONE; spin_lock_irqsave(&h->lock, flags); h->last_intr_timestamp = get_jiffies_64(); while (interrupt_pending(h)) { raw_tag = get_next_completion(h); while (raw_tag != FIFO_EMPTY) { if (hpsa_tag_contains_index(raw_tag)) raw_tag = process_indexed_cmd(h, raw_tag); else raw_tag = process_nonindexed_cmd(h, raw_tag); } } spin_unlock_irqrestore(&h->lock, flags); return IRQ_HANDLED; } static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id) { struct ctlr_info *h = dev_id; unsigned long flags; u32 raw_tag; spin_lock_irqsave(&h->lock, flags); h->last_intr_timestamp = get_jiffies_64(); raw_tag = get_next_completion(h); while (raw_tag != FIFO_EMPTY) { if (hpsa_tag_contains_index(raw_tag)) raw_tag = process_indexed_cmd(h, raw_tag); else raw_tag = process_nonindexed_cmd(h, raw_tag); } spin_unlock_irqrestore(&h->lock, flags); return IRQ_HANDLED; } /* Send a message CDB to the firmware. Careful, this only works * in simple mode, not performant mode due to the tag lookup. * We only ever use this immediately after a controller reset. */ static __devinit int hpsa_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type) { struct Command { struct CommandListHeader CommandHeader; struct RequestBlock Request; struct ErrDescriptor ErrorDescriptor; }; struct Command *cmd; static const size_t cmd_sz = sizeof(*cmd) + sizeof(cmd->ErrorDescriptor); dma_addr_t paddr64; uint32_t paddr32, tag; void __iomem *vaddr; int i, err; vaddr = pci_ioremap_bar(pdev, 0); if (vaddr == NULL) return -ENOMEM; /* The Inbound Post Queue only accepts 32-bit physical addresses for the * CCISS commands, so they must be allocated from the lower 4GiB of * memory. */ err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); if (err) { iounmap(vaddr); return -ENOMEM; } cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64); if (cmd == NULL) { iounmap(vaddr); return -ENOMEM; } /* This must fit, because of the 32-bit consistent DMA mask. Also, * although there's no guarantee, we assume that the address is at * least 4-byte aligned (most likely, it's page-aligned). */ paddr32 = paddr64; cmd->CommandHeader.ReplyQueue = 0; cmd->CommandHeader.SGList = 0; cmd->CommandHeader.SGTotal = 0; cmd->CommandHeader.Tag.lower = paddr32; cmd->CommandHeader.Tag.upper = 0; memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8); cmd->Request.CDBLen = 16; cmd->Request.Type.Type = TYPE_MSG; cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE; cmd->Request.Type.Direction = XFER_NONE; cmd->Request.Timeout = 0; /* Don't time out */ cmd->Request.CDB[0] = opcode; cmd->Request.CDB[1] = type; memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */ cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(*cmd); cmd->ErrorDescriptor.Addr.upper = 0; cmd->ErrorDescriptor.Len = sizeof(struct ErrorInfo); writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET); for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) { tag = readl(vaddr + SA5_REPLY_PORT_OFFSET); if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr32) break; msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS); } iounmap(vaddr); /* we leak the DMA buffer here ... no choice since the controller could * still complete the command. */ if (i == HPSA_MSG_SEND_RETRY_LIMIT) { dev_err(&pdev->dev, "controller message %02x:%02x timed out\n", opcode, type); return -ETIMEDOUT; } pci_free_consistent(pdev, cmd_sz, cmd, paddr64); if (tag & HPSA_ERROR_BIT) { dev_err(&pdev->dev, "controller message %02x:%02x failed\n", opcode, type); return -EIO; } dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n", opcode, type); return 0; } #define hpsa_noop(p) hpsa_message(p, 3, 0) static int hpsa_controller_hard_reset(struct pci_dev *pdev, void * __iomem vaddr, u32 use_doorbell) { u16 pmcsr; int pos; if (use_doorbell) { /* For everything after the P600, the PCI power state method * of resetting the controller doesn't work, so we have this * other way using the doorbell register. */ dev_info(&pdev->dev, "using doorbell to reset controller\n"); writel(use_doorbell, vaddr + SA5_DOORBELL); } else { /* Try to do it the PCI power state way */ /* Quoting from the Open CISS Specification: "The Power * Management Control/Status Register (CSR) controls the power * state of the device. The normal operating state is D0, * CSR=00h. The software off state is D3, CSR=03h. To reset * the controller, place the interface device in D3 then to D0, * this causes a secondary PCI reset which will reset the * controller." */ pos = pci_find_capability(pdev, PCI_CAP_ID_PM); if (pos == 0) { dev_err(&pdev->dev, "hpsa_reset_controller: " "PCI PM not supported\n"); return -ENODEV; } dev_info(&pdev->dev, "using PCI PM to reset controller\n"); /* enter the D3hot power management state */ pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr); pmcsr &= ~PCI_PM_CTRL_STATE_MASK; pmcsr |= PCI_D3hot; pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); msleep(500); /* enter the D0 power management state */ pmcsr &= ~PCI_PM_CTRL_STATE_MASK; pmcsr |= PCI_D0; pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); /* * The P600 requires a small delay when changing states. * Otherwise we may think the board did not reset and we bail. * This for kdump only and is particular to the P600. */ msleep(500); } return 0; } static __devinit void init_driver_version(char *driver_version, int len) { memset(driver_version, 0, len); strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1); } static __devinit int write_driver_ver_to_cfgtable( struct CfgTable __iomem *cfgtable) { char *driver_version; int i, size = sizeof(cfgtable->driver_version); driver_version = kmalloc(size, GFP_KERNEL); if (!driver_version) return -ENOMEM; init_driver_version(driver_version, size); for (i = 0; i < size; i++) writeb(driver_version[i], &cfgtable->driver_version[i]); kfree(driver_version); return 0; } static __devinit void read_driver_ver_from_cfgtable( struct CfgTable __iomem *cfgtable, unsigned char *driver_ver) { int i; for (i = 0; i < sizeof(cfgtable->driver_version); i++) driver_ver[i] = readb(&cfgtable->driver_version[i]); } static __devinit int controller_reset_failed( struct CfgTable __iomem *cfgtable) { char *driver_ver, *old_driver_ver; int rc, size = sizeof(cfgtable->driver_version); old_driver_ver = kmalloc(2 * size, GFP_KERNEL); if (!old_driver_ver) return -ENOMEM; driver_ver = old_driver_ver + size; /* After a reset, the 32 bytes of "driver version" in the cfgtable * should have been changed, otherwise we know the reset failed. */ init_driver_version(old_driver_ver, size); read_driver_ver_from_cfgtable(cfgtable, driver_ver); rc = !memcmp(driver_ver, old_driver_ver, size); kfree(old_driver_ver); return rc; } /* This does a hard reset of the controller using PCI power management * states or the using the doorbell register. */ static __devinit int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev) { u64 cfg_offset; u32 cfg_base_addr; u64 cfg_base_addr_index; void __iomem *vaddr; unsigned long paddr; u32 misc_fw_support; int rc; struct CfgTable __iomem *cfgtable; u32 use_doorbell; u32 board_id; u16 command_register; /* For controllers as old as the P600, this is very nearly * the same thing as * * pci_save_state(pci_dev); * pci_set_power_state(pci_dev, PCI_D3hot); * pci_set_power_state(pci_dev, PCI_D0); * pci_restore_state(pci_dev); * * For controllers newer than the P600, the pci power state * method of resetting doesn't work so we have another way * using the doorbell register. */ rc = hpsa_lookup_board_id(pdev, &board_id); if (rc < 0 || !ctlr_is_resettable(board_id)) { dev_warn(&pdev->dev, "Not resetting device.\n"); return -ENODEV; } /* if controller is soft- but not hard resettable... */ if (!ctlr_is_hard_resettable(board_id)) return -ENOTSUPP; /* try soft reset later. */ /* Save the PCI command register */ pci_read_config_word(pdev, 4, &command_register); /* Turn the board off. This is so that later pci_restore_state() * won't turn the board on before the rest of config space is ready. */ pci_disable_device(pdev); pci_save_state(pdev); /* find the first memory BAR, so we can find the cfg table */ rc = hpsa_pci_find_memory_BAR(pdev, &paddr); if (rc) return rc; vaddr = remap_pci_mem(paddr, 0x250); if (!vaddr) return -ENOMEM; /* find cfgtable in order to check if reset via doorbell is supported */ rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr, &cfg_base_addr_index, &cfg_offset); if (rc) goto unmap_vaddr; cfgtable = remap_pci_mem(pci_resource_start(pdev, cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable)); if (!cfgtable) { rc = -ENOMEM; goto unmap_vaddr; } rc = write_driver_ver_to_cfgtable(cfgtable); if (rc) goto unmap_vaddr; /* If reset via doorbell register is supported, use that. * There are two such methods. Favor the newest method. */ misc_fw_support = readl(&cfgtable->misc_fw_support); use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2; if (use_doorbell) { use_doorbell = DOORBELL_CTLR_RESET2; } else { use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET; if (use_doorbell) { dev_warn(&pdev->dev, "Soft reset not supported. " "Firmware update is required.\n"); rc = -ENOTSUPP; /* try soft reset */ goto unmap_cfgtable; } } rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell); if (rc) goto unmap_cfgtable; pci_restore_state(pdev); rc = pci_enable_device(pdev); if (rc) { dev_warn(&pdev->dev, "failed to enable device.\n"); goto unmap_cfgtable; } pci_write_config_word(pdev, 4, command_register); /* Some devices (notably the HP Smart Array 5i Controller) need a little pause here */ msleep(HPSA_POST_RESET_PAUSE_MSECS); /* Wait for board to become not ready, then ready. */ dev_info(&pdev->dev, "Waiting for board to reset.\n"); rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY); if (rc) { dev_warn(&pdev->dev, "failed waiting for board to reset." " Will try soft reset.\n"); rc = -ENOTSUPP; /* Not expected, but try soft reset later */ goto unmap_cfgtable; } rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY); if (rc) { dev_warn(&pdev->dev, "failed waiting for board to become ready " "after hard reset\n"); goto unmap_cfgtable; } rc = controller_reset_failed(vaddr); if (rc < 0) goto unmap_cfgtable; if (rc) { dev_warn(&pdev->dev, "Unable to successfully reset " "controller. Will try soft reset.\n"); rc = -ENOTSUPP; } else { dev_info(&pdev->dev, "board ready after hard reset.\n"); } unmap_cfgtable: iounmap(cfgtable); unmap_vaddr: iounmap(vaddr); return rc; } /* * We cannot read the structure directly, for portability we must use * the io functions. * This is for debug only. */ static void print_cfg_table(struct device *dev, struct CfgTable *tb) { #ifdef HPSA_DEBUG int i; char temp_name[17]; dev_info(dev, "Controller Configuration information\n"); dev_info(dev, "------------------------------------\n"); for (i = 0; i < 4; i++) temp_name[i] = readb(&(tb->Signature[i])); temp_name[4] = '\0'; dev_info(dev, " Signature = %s\n", temp_name); dev_info(dev, " Spec Number = %d\n", readl(&(tb->SpecValence))); dev_info(dev, " Transport methods supported = 0x%x\n", readl(&(tb->TransportSupport))); dev_info(dev, " Transport methods active = 0x%x\n", readl(&(tb->TransportActive))); dev_info(dev, " Requested transport Method = 0x%x\n", readl(&(tb->HostWrite.TransportRequest))); dev_info(dev, " Coalesce Interrupt Delay = 0x%x\n", readl(&(tb->HostWrite.CoalIntDelay))); dev_info(dev, " Coalesce Interrupt Count = 0x%x\n", readl(&(tb->HostWrite.CoalIntCount))); dev_info(dev, " Max outstanding commands = 0x%d\n", readl(&(tb->CmdsOutMax))); dev_info(dev, " Bus Types = 0x%x\n", readl(&(tb->BusTypes))); for (i = 0; i < 16; i++) temp_name[i] = readb(&(tb->ServerName[i])); temp_name[16] = '\0'; dev_info(dev, " Server Name = %s\n", temp_name); dev_info(dev, " Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat))); #endif /* HPSA_DEBUG */ } static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr) { int i, offset, mem_type, bar_type; if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */ return 0; offset = 0; for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE; if (bar_type == PCI_BASE_ADDRESS_SPACE_IO) offset += 4; else { mem_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_MEM_TYPE_MASK; switch (mem_type) { case PCI_BASE_ADDRESS_MEM_TYPE_32: case PCI_BASE_ADDRESS_MEM_TYPE_1M: offset += 4; /* 32 bit */ break; case PCI_BASE_ADDRESS_MEM_TYPE_64: offset += 8; break; default: /* reserved in PCI 2.2 */ dev_warn(&pdev->dev, "base address is invalid\n"); return -1; break; } } if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0) return i + 1; } return -1; } /* If MSI/MSI-X is supported by the kernel we will try to enable it on * controllers that are capable. If not, we use IO-APIC mode. */ static void __devinit hpsa_interrupt_mode(struct ctlr_info *h) { #ifdef CONFIG_PCI_MSI int err; struct msix_entry hpsa_msix_entries[4] = { {0, 0}, {0, 1}, {0, 2}, {0, 3} }; /* Some boards advertise MSI but don't really support it */ if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) || (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11)) goto default_int_mode; if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) { dev_info(&h->pdev->dev, "MSIX\n"); err = pci_enable_msix(h->pdev, hpsa_msix_entries, 4); if (!err) { h->intr[0] = hpsa_msix_entries[0].vector; h->intr[1] = hpsa_msix_entries[1].vector; h->intr[2] = hpsa_msix_entries[2].vector; h->intr[3] = hpsa_msix_entries[3].vector; h->msix_vector = 1; return; } if (err > 0) { dev_warn(&h->pdev->dev, "only %d MSI-X vectors " "available\n", err); goto default_int_mode; } else { dev_warn(&h->pdev->dev, "MSI-X init failed %d\n", err); goto default_int_mode; } } if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) { dev_info(&h->pdev->dev, "MSI\n"); if (!pci_enable_msi(h->pdev)) h->msi_vector = 1; else dev_warn(&h->pdev->dev, "MSI init failed\n"); } default_int_mode: #endif /* CONFIG_PCI_MSI */ /* if we get here we're going to use the default interrupt mode */ h->intr[h->intr_mode] = h->pdev->irq; } static int __devinit hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id) { int i; u32 subsystem_vendor_id, subsystem_device_id; subsystem_vendor_id = pdev->subsystem_vendor; subsystem_device_id = pdev->subsystem_device; *board_id = ((subsystem_device_id << 16) & 0xffff0000) | subsystem_vendor_id; for (i = 0; i < ARRAY_SIZE(products); i++) if (*board_id == products[i].board_id) return i; if ((subsystem_vendor_id != PCI_VENDOR_ID_HP && subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) || !hpsa_allow_any) { dev_warn(&pdev->dev, "unrecognized board ID: " "0x%08x, ignoring.\n", *board_id); return -ENODEV; } return ARRAY_SIZE(products) - 1; /* generic unknown smart array */ } static inline bool hpsa_board_disabled(struct pci_dev *pdev) { u16 command; (void) pci_read_config_word(pdev, PCI_COMMAND, &command); return ((command & PCI_COMMAND_MEMORY) == 0); } static int __devinit hpsa_pci_find_memory_BAR(struct pci_dev *pdev, unsigned long *memory_bar) { int i; for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) { /* addressing mode bits already removed */ *memory_bar = pci_resource_start(pdev, i); dev_dbg(&pdev->dev, "memory BAR = %lx\n", *memory_bar); return 0; } dev_warn(&pdev->dev, "no memory BAR found\n"); return -ENODEV; } static int __devinit hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr, int wait_for_ready) { int i, iterations; u32 scratchpad; if (wait_for_ready) iterations = HPSA_BOARD_READY_ITERATIONS; else iterations = HPSA_BOARD_NOT_READY_ITERATIONS; for (i = 0; i < iterations; i++) { scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET); if (wait_for_ready) { if (scratchpad == HPSA_FIRMWARE_READY) return 0; } else { if (scratchpad != HPSA_FIRMWARE_READY) return 0; } msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS); } dev_warn(&pdev->dev, "board not ready, timed out.\n"); return -ENODEV; } static int __devinit hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr, u32 *cfg_base_addr, u64 *cfg_base_addr_index, u64 *cfg_offset) { *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET); *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET); *cfg_base_addr &= (u32) 0x0000ffff; *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr); if (*cfg_base_addr_index == -1) { dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n"); return -ENODEV; } return 0; } static int __devinit hpsa_find_cfgtables(struct ctlr_info *h) { u64 cfg_offset; u32 cfg_base_addr; u64 cfg_base_addr_index; u32 trans_offset; int rc; rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr, &cfg_base_addr_index, &cfg_offset); if (rc) return rc; h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev, cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable)); if (!h->cfgtable) return -ENOMEM; rc = write_driver_ver_to_cfgtable(h->cfgtable); if (rc) return rc; /* Find performant mode table. */ trans_offset = readl(&h->cfgtable->TransMethodOffset); h->transtable = remap_pci_mem(pci_resource_start(h->pdev, cfg_base_addr_index)+cfg_offset+trans_offset, sizeof(*h->transtable)); if (!h->transtable) return -ENOMEM; return 0; } static void __devinit hpsa_get_max_perf_mode_cmds(struct ctlr_info *h) { h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands)); /* Limit commands in memory limited kdump scenario. */ if (reset_devices && h->max_commands > 32) h->max_commands = 32; if (h->max_commands < 16) { dev_warn(&h->pdev->dev, "Controller reports " "max supported commands of %d, an obvious lie. " "Using 16. Ensure that firmware is up to date.\n", h->max_commands); h->max_commands = 16; } } /* Interrogate the hardware for some limits: * max commands, max SG elements without chaining, and with chaining, * SG chain block size, etc. */ static void __devinit hpsa_find_board_params(struct ctlr_info *h) { hpsa_get_max_perf_mode_cmds(h); h->nr_cmds = h->max_commands - 4; /* Allow room for some ioctls */ h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements)); /* * Limit in-command s/g elements to 32 save dma'able memory. * Howvever spec says if 0, use 31 */ h->max_cmd_sg_entries = 31; if (h->maxsgentries > 512) { h->max_cmd_sg_entries = 32; h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1; h->maxsgentries--; /* save one for chain pointer */ } else { h->maxsgentries = 31; /* default to traditional values */ h->chainsize = 0; } } static inline bool hpsa_CISS_signature_present(struct ctlr_info *h) { if (!check_signature(h->cfgtable->Signature, "CISS", 4)) { dev_warn(&h->pdev->dev, "not a valid CISS config table\n"); return false; } return true; } /* Need to enable prefetch in the SCSI core for 6400 in x86 */ static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h) { #ifdef CONFIG_X86 u32 prefetch; prefetch = readl(&(h->cfgtable->SCSI_Prefetch)); prefetch |= 0x100; writel(prefetch, &(h->cfgtable->SCSI_Prefetch)); #endif } /* Disable DMA prefetch for the P600. Otherwise an ASIC bug may result * in a prefetch beyond physical memory. */ static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h) { u32 dma_prefetch; if (h->board_id != 0x3225103C) return; dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG); dma_prefetch |= 0x8000; writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG); } static void __devinit hpsa_wait_for_mode_change_ack(struct ctlr_info *h) { int i; u32 doorbell_value; unsigned long flags; /* under certain very rare conditions, this can take awhile. * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right * as we enter this code.) */ for (i = 0; i < MAX_CONFIG_WAIT; i++) { spin_lock_irqsave(&h->lock, flags); doorbell_value = readl(h->vaddr + SA5_DOORBELL); spin_unlock_irqrestore(&h->lock, flags); if (!(doorbell_value & CFGTBL_ChangeReq)) break; /* delay and try again */ usleep_range(10000, 20000); } } static int __devinit hpsa_enter_simple_mode(struct ctlr_info *h) { u32 trans_support; trans_support = readl(&(h->cfgtable->TransportSupport)); if (!(trans_support & SIMPLE_MODE)) return -ENOTSUPP; h->max_commands = readl(&(h->cfgtable->CmdsOutMax)); /* Update the field, and then ring the doorbell */ writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest)); writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL); hpsa_wait_for_mode_change_ack(h); print_cfg_table(&h->pdev->dev, h->cfgtable); if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) { dev_warn(&h->pdev->dev, "unable to get board into simple mode\n"); return -ENODEV; } h->transMethod = CFGTBL_Trans_Simple; return 0; } static int __devinit hpsa_pci_init(struct ctlr_info *h) { int prod_index, err; prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id); if (prod_index < 0) return -ENODEV; h->product_name = products[prod_index].product_name; h->access = *(products[prod_index].access); if (hpsa_board_disabled(h->pdev)) { dev_warn(&h->pdev->dev, "controller appears to be disabled\n"); return -ENODEV; } pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM); err = pci_enable_device(h->pdev); if (err) { dev_warn(&h->pdev->dev, "unable to enable PCI device\n"); return err; } err = pci_request_regions(h->pdev, HPSA); if (err) { dev_err(&h->pdev->dev, "cannot obtain PCI resources, aborting\n"); return err; } hpsa_interrupt_mode(h); err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr); if (err) goto err_out_free_res; h->vaddr = remap_pci_mem(h->paddr, 0x250); if (!h->vaddr) { err = -ENOMEM; goto err_out_free_res; } err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY); if (err) goto err_out_free_res; err = hpsa_find_cfgtables(h); if (err) goto err_out_free_res; hpsa_find_board_params(h); if (!hpsa_CISS_signature_present(h)) { err = -ENODEV; goto err_out_free_res; } hpsa_enable_scsi_prefetch(h); hpsa_p600_dma_prefetch_quirk(h); err = hpsa_enter_simple_mode(h); if (err) goto err_out_free_res; return 0; err_out_free_res: if (h->transtable) iounmap(h->transtable); if (h->cfgtable) iounmap(h->cfgtable); if (h->vaddr) iounmap(h->vaddr); pci_disable_device(h->pdev); pci_release_regions(h->pdev); return err; } static void __devinit hpsa_hba_inquiry(struct ctlr_info *h) { int rc; #define HBA_INQUIRY_BYTE_COUNT 64 h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL); if (!h->hba_inquiry_data) return; rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0, h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT); if (rc != 0) { kfree(h->hba_inquiry_data); h->hba_inquiry_data = NULL; } } static __devinit int hpsa_init_reset_devices(struct pci_dev *pdev) { int rc, i; if (!reset_devices) return 0; /* Reset the controller with a PCI power-cycle or via doorbell */ rc = hpsa_kdump_hard_reset_controller(pdev); /* -ENOTSUPP here means we cannot reset the controller * but it's already (and still) up and running in * "performant mode". Or, it might be 640x, which can't reset * due to concerns about shared bbwc between 6402/6404 pair. */ if (rc == -ENOTSUPP) return rc; /* just try to do the kdump anyhow. */ if (rc) return -ENODEV; /* Now try to get the controller to respond to a no-op */ dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n"); for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) { if (hpsa_noop(pdev) == 0) break; else dev_warn(&pdev->dev, "no-op failed%s\n", (i < 11 ? "; re-trying" : "")); } return 0; } static __devinit int hpsa_allocate_cmd_pool(struct ctlr_info *h) { h->cmd_pool_bits = kzalloc( DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG) * sizeof(unsigned long), GFP_KERNEL); h->cmd_pool = pci_alloc_consistent(h->pdev, h->nr_cmds * sizeof(*h->cmd_pool), &(h->cmd_pool_dhandle)); h->errinfo_pool = pci_alloc_consistent(h->pdev, h->nr_cmds * sizeof(*h->errinfo_pool), &(h->errinfo_pool_dhandle)); if ((h->cmd_pool_bits == NULL) || (h->cmd_pool == NULL) || (h->errinfo_pool == NULL)) { dev_err(&h->pdev->dev, "out of memory in %s", __func__); return -ENOMEM; } return 0; } static void hpsa_free_cmd_pool(struct ctlr_info *h) { kfree(h->cmd_pool_bits); if (h->cmd_pool) pci_free_consistent(h->pdev, h->nr_cmds * sizeof(struct CommandList), h->cmd_pool, h->cmd_pool_dhandle); if (h->errinfo_pool) pci_free_consistent(h->pdev, h->nr_cmds * sizeof(struct ErrorInfo), h->errinfo_pool, h->errinfo_pool_dhandle); } static int hpsa_request_irq(struct ctlr_info *h, irqreturn_t (*msixhandler)(int, void *), irqreturn_t (*intxhandler)(int, void *)) { int rc; if (h->msix_vector || h->msi_vector) rc = request_irq(h->intr[h->intr_mode], msixhandler, 0, h->devname, h); else rc = request_irq(h->intr[h->intr_mode], intxhandler, IRQF_SHARED, h->devname, h); if (rc) { dev_err(&h->pdev->dev, "unable to get irq %d for %s\n", h->intr[h->intr_mode], h->devname); return -ENODEV; } return 0; } static int __devinit hpsa_kdump_soft_reset(struct ctlr_info *h) { if (hpsa_send_host_reset(h, RAID_CTLR_LUNID, HPSA_RESET_TYPE_CONTROLLER)) { dev_warn(&h->pdev->dev, "Resetting array controller failed.\n"); return -EIO; } dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n"); if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY)) { dev_warn(&h->pdev->dev, "Soft reset had no effect.\n"); return -1; } dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n"); if (hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY)) { dev_warn(&h->pdev->dev, "Board failed to become ready " "after soft reset.\n"); return -1; } return 0; } static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h) { free_irq(h->intr[h->intr_mode], h); #ifdef CONFIG_PCI_MSI if (h->msix_vector) pci_disable_msix(h->pdev); else if (h->msi_vector) pci_disable_msi(h->pdev); #endif /* CONFIG_PCI_MSI */ hpsa_free_sg_chain_blocks(h); hpsa_free_cmd_pool(h); kfree(h->blockFetchTable); pci_free_consistent(h->pdev, h->reply_pool_size, h->reply_pool, h->reply_pool_dhandle); if (h->vaddr) iounmap(h->vaddr); if (h->transtable) iounmap(h->transtable); if (h->cfgtable) iounmap(h->cfgtable); pci_release_regions(h->pdev); kfree(h); } static void remove_ctlr_from_lockup_detector_list(struct ctlr_info *h) { assert_spin_locked(&lockup_detector_lock); if (!hpsa_lockup_detector) return; if (h->lockup_detected) return; /* already stopped the lockup detector */ list_del(&h->lockup_list); } /* Called when controller lockup detected. */ static void fail_all_cmds_on_list(struct ctlr_info *h, struct list_head *list) { struct CommandList *c = NULL; assert_spin_locked(&h->lock); /* Mark all outstanding commands as failed and complete them. */ while (!list_empty(list)) { c = list_entry(list->next, struct CommandList, list); c->err_info->CommandStatus = CMD_HARDWARE_ERR; finish_cmd(c, c->Header.Tag.lower); } } static void controller_lockup_detected(struct ctlr_info *h) { unsigned long flags; assert_spin_locked(&lockup_detector_lock); remove_ctlr_from_lockup_detector_list(h); h->access.set_intr_mask(h, HPSA_INTR_OFF); spin_lock_irqsave(&h->lock, flags); h->lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET); spin_unlock_irqrestore(&h->lock, flags); dev_warn(&h->pdev->dev, "Controller lockup detected: 0x%08x\n", h->lockup_detected); pci_disable_device(h->pdev); spin_lock_irqsave(&h->lock, flags); fail_all_cmds_on_list(h, &h->cmpQ); fail_all_cmds_on_list(h, &h->reqQ); spin_unlock_irqrestore(&h->lock, flags); } #define HEARTBEAT_SAMPLE_INTERVAL (10 * HZ) #define HEARTBEAT_CHECK_MINIMUM_INTERVAL (HEARTBEAT_SAMPLE_INTERVAL / 2) static void detect_controller_lockup(struct ctlr_info *h) { u64 now; u32 heartbeat; unsigned long flags; assert_spin_locked(&lockup_detector_lock); now = get_jiffies_64(); /* If we've received an interrupt recently, we're ok. */ if (time_after64(h->last_intr_timestamp + (HEARTBEAT_CHECK_MINIMUM_INTERVAL), now)) return; /* * If we've already checked the heartbeat recently, we're ok. * This could happen if someone sends us a signal. We * otherwise don't care about signals in this thread. */ if (time_after64(h->last_heartbeat_timestamp + (HEARTBEAT_CHECK_MINIMUM_INTERVAL), now)) return; /* If heartbeat has not changed since we last looked, we're not ok. */ spin_lock_irqsave(&h->lock, flags); heartbeat = readl(&h->cfgtable->HeartBeat); spin_unlock_irqrestore(&h->lock, flags); if (h->last_heartbeat == heartbeat) { controller_lockup_detected(h); return; } /* We're ok. */ h->last_heartbeat = heartbeat; h->last_heartbeat_timestamp = now; } static int detect_controller_lockup_thread(void *notused) { struct ctlr_info *h; unsigned long flags; while (1) { struct list_head *this, *tmp; schedule_timeout_interruptible(HEARTBEAT_SAMPLE_INTERVAL); if (kthread_should_stop()) break; spin_lock_irqsave(&lockup_detector_lock, flags); list_for_each_safe(this, tmp, &hpsa_ctlr_list) { h = list_entry(this, struct ctlr_info, lockup_list); detect_controller_lockup(h); } spin_unlock_irqrestore(&lockup_detector_lock, flags); } return 0; } static void add_ctlr_to_lockup_detector_list(struct ctlr_info *h) { unsigned long flags; spin_lock_irqsave(&lockup_detector_lock, flags); list_add_tail(&h->lockup_list, &hpsa_ctlr_list); spin_unlock_irqrestore(&lockup_detector_lock, flags); } static void start_controller_lockup_detector(struct ctlr_info *h) { /* Start the lockup detector thread if not already started */ if (!hpsa_lockup_detector) { spin_lock_init(&lockup_detector_lock); hpsa_lockup_detector = kthread_run(detect_controller_lockup_thread, NULL, HPSA); } if (!hpsa_lockup_detector) { dev_warn(&h->pdev->dev, "Could not start lockup detector thread\n"); return; } add_ctlr_to_lockup_detector_list(h); } static void stop_controller_lockup_detector(struct ctlr_info *h) { unsigned long flags; spin_lock_irqsave(&lockup_detector_lock, flags); remove_ctlr_from_lockup_detector_list(h); /* If the list of ctlr's to monitor is empty, stop the thread */ if (list_empty(&hpsa_ctlr_list)) { spin_unlock_irqrestore(&lockup_detector_lock, flags); kthread_stop(hpsa_lockup_detector); spin_lock_irqsave(&lockup_detector_lock, flags); hpsa_lockup_detector = NULL; } spin_unlock_irqrestore(&lockup_detector_lock, flags); } static int __devinit hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { int dac, rc; struct ctlr_info *h; int try_soft_reset = 0; unsigned long flags; if (number_of_controllers == 0) printk(KERN_INFO DRIVER_NAME "\n"); rc = hpsa_init_reset_devices(pdev); if (rc) { if (rc != -ENOTSUPP) return rc; /* If the reset fails in a particular way (it has no way to do * a proper hard reset, so returns -ENOTSUPP) we can try to do * a soft reset once we get the controller configured up to the * point that it can accept a command. */ try_soft_reset = 1; rc = 0; } reinit_after_soft_reset: /* Command structures must be aligned on a 32-byte boundary because * the 5 lower bits of the address are used by the hardware. and by * the driver. See comments in hpsa.h for more info. */ #define COMMANDLIST_ALIGNMENT 32 BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT); h = kzalloc(sizeof(*h), GFP_KERNEL); if (!h) return -ENOMEM; h->pdev = pdev; h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT; INIT_LIST_HEAD(&h->cmpQ); INIT_LIST_HEAD(&h->reqQ); spin_lock_init(&h->lock); spin_lock_init(&h->scan_lock); rc = hpsa_pci_init(h); if (rc != 0) goto clean1; sprintf(h->devname, HPSA "%d", number_of_controllers); h->ctlr = number_of_controllers; number_of_controllers++; /* configure PCI DMA stuff */ rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); if (rc == 0) { dac = 1; } else { rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (rc == 0) { dac = 0; } else { dev_err(&pdev->dev, "no suitable DMA available\n"); goto clean1; } } /* make sure the board interrupts are off */ h->access.set_intr_mask(h, HPSA_INTR_OFF); if (hpsa_request_irq(h, do_hpsa_intr_msi, do_hpsa_intr_intx)) goto clean2; dev_info(&pdev->dev, "%s: <0x%x> at IRQ %d%s using DAC\n", h->devname, pdev->device, h->intr[h->intr_mode], dac ? "" : " not"); if (hpsa_allocate_cmd_pool(h)) goto clean4; if (hpsa_allocate_sg_chain_blocks(h)) goto clean4; init_waitqueue_head(&h->scan_wait_queue); h->scan_finished = 1; /* no scan currently in progress */ pci_set_drvdata(pdev, h); h->ndevices = 0; h->scsi_host = NULL; spin_lock_init(&h->devlock); hpsa_put_ctlr_into_performant_mode(h); /* At this point, the controller is ready to take commands. * Now, if reset_devices and the hard reset didn't work, try * the soft reset and see if that works. */ if (try_soft_reset) { /* This is kind of gross. We may or may not get a completion * from the soft reset command, and if we do, then the value * from the fifo may or may not be valid. So, we wait 10 secs * after the reset throwing away any completions we get during * that time. Unregister the interrupt handler and register * fake ones to scoop up any residual completions. */ spin_lock_irqsave(&h->lock, flags); h->access.set_intr_mask(h, HPSA_INTR_OFF); spin_unlock_irqrestore(&h->lock, flags); free_irq(h->intr[h->intr_mode], h); rc = hpsa_request_irq(h, hpsa_msix_discard_completions, hpsa_intx_discard_completions); if (rc) { dev_warn(&h->pdev->dev, "Failed to request_irq after " "soft reset.\n"); goto clean4; } rc = hpsa_kdump_soft_reset(h); if (rc) /* Neither hard nor soft reset worked, we're hosed. */ goto clean4; dev_info(&h->pdev->dev, "Board READY.\n"); dev_info(&h->pdev->dev, "Waiting for stale completions to drain.\n"); h->access.set_intr_mask(h, HPSA_INTR_ON); msleep(10000); h->access.set_intr_mask(h, HPSA_INTR_OFF); rc = controller_reset_failed(h->cfgtable); if (rc) dev_info(&h->pdev->dev, "Soft reset appears to have failed.\n"); /* since the controller's reset, we have to go back and re-init * everything. Easiest to just forget what we've done and do it * all over again. */ hpsa_undo_allocations_after_kdump_soft_reset(h); try_soft_reset = 0; if (rc) /* don't go to clean4, we already unallocated */ return -ENODEV; goto reinit_after_soft_reset; } /* Turn the interrupts on so we can service requests */ h->access.set_intr_mask(h, HPSA_INTR_ON); hpsa_hba_inquiry(h); hpsa_register_scsi(h); /* hook ourselves into SCSI subsystem */ start_controller_lockup_detector(h); return 1; clean4: hpsa_free_sg_chain_blocks(h); hpsa_free_cmd_pool(h); free_irq(h->intr[h->intr_mode], h); clean2: clean1: kfree(h); return rc; } static void hpsa_flush_cache(struct ctlr_info *h) { char *flush_buf; struct CommandList *c; flush_buf = kzalloc(4, GFP_KERNEL); if (!flush_buf) return; c = cmd_special_alloc(h); if (!c) { dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n"); goto out_of_memory; } fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0, RAID_CTLR_LUNID, TYPE_CMD); hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_TODEVICE); if (c->err_info->CommandStatus != 0) dev_warn(&h->pdev->dev, "error flushing cache on controller\n"); cmd_special_free(h, c); out_of_memory: kfree(flush_buf); } static void hpsa_shutdown(struct pci_dev *pdev) { struct ctlr_info *h; h = pci_get_drvdata(pdev); /* Turn board interrupts off and send the flush cache command * sendcmd will turn off interrupt, and send the flush... * To write all data in the battery backed cache to disks */ hpsa_flush_cache(h); h->access.set_intr_mask(h, HPSA_INTR_OFF); free_irq(h->intr[h->intr_mode], h); #ifdef CONFIG_PCI_MSI if (h->msix_vector) pci_disable_msix(h->pdev); else if (h->msi_vector) pci_disable_msi(h->pdev); #endif /* CONFIG_PCI_MSI */ } static void __devexit hpsa_free_device_info(struct ctlr_info *h) { int i; for (i = 0; i < h->ndevices; i++) kfree(h->dev[i]); } static void __devexit hpsa_remove_one(struct pci_dev *pdev) { struct ctlr_info *h; if (pci_get_drvdata(pdev) == NULL) { dev_err(&pdev->dev, "unable to remove device\n"); return; } h = pci_get_drvdata(pdev); stop_controller_lockup_detector(h); hpsa_unregister_scsi(h); /* unhook from SCSI subsystem */ hpsa_shutdown(pdev); iounmap(h->vaddr); iounmap(h->transtable); iounmap(h->cfgtable); hpsa_free_device_info(h); hpsa_free_sg_chain_blocks(h); pci_free_consistent(h->pdev, h->nr_cmds * sizeof(struct CommandList), h->cmd_pool, h->cmd_pool_dhandle); pci_free_consistent(h->pdev, h->nr_cmds * sizeof(struct ErrorInfo), h->errinfo_pool, h->errinfo_pool_dhandle); pci_free_consistent(h->pdev, h->reply_pool_size, h->reply_pool, h->reply_pool_dhandle); kfree(h->cmd_pool_bits); kfree(h->blockFetchTable); kfree(h->hba_inquiry_data); pci_disable_device(pdev); pci_release_regions(pdev); pci_set_drvdata(pdev, NULL); kfree(h); } static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev, __attribute__((unused)) pm_message_t state) { return -ENOSYS; } static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev) { return -ENOSYS; } static struct pci_driver hpsa_pci_driver = { .name = HPSA, .probe = hpsa_init_one, .remove = __devexit_p(hpsa_remove_one), .id_table = hpsa_pci_device_id, /* id_table */ .shutdown = hpsa_shutdown, .suspend = hpsa_suspend, .resume = hpsa_resume, }; /* Fill in bucket_map[], given nsgs (the max number of * scatter gather elements supported) and bucket[], * which is an array of 8 integers. The bucket[] array * contains 8 different DMA transfer sizes (in 16 * byte increments) which the controller uses to fetch * commands. This function fills in bucket_map[], which * maps a given number of scatter gather elements to one of * the 8 DMA transfer sizes. The point of it is to allow the * controller to only do as much DMA as needed to fetch the * command, with the DMA transfer size encoded in the lower * bits of the command address. */ static void calc_bucket_map(int bucket[], int num_buckets, int nsgs, int *bucket_map) { int i, j, b, size; /* even a command with 0 SGs requires 4 blocks */ #define MINIMUM_TRANSFER_BLOCKS 4 #define NUM_BUCKETS 8 /* Note, bucket_map must have nsgs+1 entries. */ for (i = 0; i <= nsgs; i++) { /* Compute size of a command with i SG entries */ size = i + MINIMUM_TRANSFER_BLOCKS; b = num_buckets; /* Assume the biggest bucket */ /* Find the bucket that is just big enough */ for (j = 0; j < 8; j++) { if (bucket[j] >= size) { b = j; break; } } /* for a command with i SG entries, use bucket b. */ bucket_map[i] = b; } } static __devinit void hpsa_enter_performant_mode(struct ctlr_info *h, u32 use_short_tags) { int i; unsigned long register_value; /* This is a bit complicated. There are 8 registers on * the controller which we write to to tell it 8 different * sizes of commands which there may be. It's a way of * reducing the DMA done to fetch each command. Encoded into * each command's tag are 3 bits which communicate to the controller * which of the eight sizes that command fits within. The size of * each command depends on how many scatter gather entries there are. * Each SG entry requires 16 bytes. The eight registers are programmed * with the number of 16-byte blocks a command of that size requires. * The smallest command possible requires 5 such 16 byte blocks. * the largest command possible requires SG_ENTRIES_IN_CMD + 4 16-byte * blocks. Note, this only extends to the SG entries contained * within the command block, and does not extend to chained blocks * of SG elements. bft[] contains the eight values we write to * the registers. They are not evenly distributed, but have more * sizes for small commands, and fewer sizes for larger commands. */ int bft[8] = {5, 6, 8, 10, 12, 20, 28, SG_ENTRIES_IN_CMD + 4}; BUILD_BUG_ON(28 > SG_ENTRIES_IN_CMD + 4); /* 5 = 1 s/g entry or 4k * 6 = 2 s/g entry or 8k * 8 = 4 s/g entry or 16k * 10 = 6 s/g entry or 24k */ h->reply_pool_wraparound = 1; /* spec: init to 1 */ /* Controller spec: zero out this buffer. */ memset(h->reply_pool, 0, h->reply_pool_size); h->reply_pool_head = h->reply_pool; bft[7] = SG_ENTRIES_IN_CMD + 4; calc_bucket_map(bft, ARRAY_SIZE(bft), SG_ENTRIES_IN_CMD, h->blockFetchTable); for (i = 0; i < 8; i++) writel(bft[i], &h->transtable->BlockFetch[i]); /* size of controller ring buffer */ writel(h->max_commands, &h->transtable->RepQSize); writel(1, &h->transtable->RepQCount); writel(0, &h->transtable->RepQCtrAddrLow32); writel(0, &h->transtable->RepQCtrAddrHigh32); writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32); writel(0, &h->transtable->RepQAddr0High32); writel(CFGTBL_Trans_Performant | use_short_tags, &(h->cfgtable->HostWrite.TransportRequest)); writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL); hpsa_wait_for_mode_change_ack(h); register_value = readl(&(h->cfgtable->TransportActive)); if (!(register_value & CFGTBL_Trans_Performant)) { dev_warn(&h->pdev->dev, "unable to get board into" " performant mode\n"); return; } /* Change the access methods to the performant access methods */ h->access = SA5_performant_access; h->transMethod = CFGTBL_Trans_Performant; } static __devinit void hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h) { u32 trans_support; if (hpsa_simple_mode) return; trans_support = readl(&(h->cfgtable->TransportSupport)); if (!(trans_support & PERFORMANT_MODE)) return; hpsa_get_max_perf_mode_cmds(h); /* Performant mode ring buffer and supporting data structures */ h->reply_pool_size = h->max_commands * sizeof(u64); h->reply_pool = pci_alloc_consistent(h->pdev, h->reply_pool_size, &(h->reply_pool_dhandle)); /* Need a block fetch table for performant mode */ h->blockFetchTable = kmalloc(((SG_ENTRIES_IN_CMD + 1) * sizeof(u32)), GFP_KERNEL); if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL)) goto clean_up; hpsa_enter_performant_mode(h, trans_support & CFGTBL_Trans_use_short_tags); return; clean_up: if (h->reply_pool) pci_free_consistent(h->pdev, h->reply_pool_size, h->reply_pool, h->reply_pool_dhandle); kfree(h->blockFetchTable); } /* * This is it. Register the PCI driver information for the cards we control * the OS will call our registered routines when it finds one of our cards. */ static int __init hpsa_init(void) { return pci_register_driver(&hpsa_pci_driver); } static void __exit hpsa_cleanup(void) { pci_unregister_driver(&hpsa_pci_driver); } module_init(hpsa_init); module_exit(hpsa_cleanup);