sx8.c
资源名称:block.rar [点击查看]
上传用户:ajay2009
上传日期:2009-05-22
资源大小:495k
文件大小:40k
源码类别:
驱动编程
开发平台:
Unix_Linux
- /*
- * sx8.c: Driver for Promise SATA SX8 looks-like-I2O hardware
- *
- * Copyright 2004 Red Hat, Inc.
- *
- * Author/maintainer: Jeff Garzik <jgarzik@pobox.com>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/pci.h>
- #include <linux/slab.h>
- #include <linux/spinlock.h>
- #include <linux/blkdev.h>
- #include <linux/sched.h>
- #include <linux/devfs_fs_kernel.h>
- #include <linux/interrupt.h>
- #include <linux/compiler.h>
- #include <linux/workqueue.h>
- #include <linux/bitops.h>
- #include <linux/delay.h>
- #include <linux/time.h>
- #include <linux/hdreg.h>
- #include <linux/dma-mapping.h>
- #include <asm/io.h>
- #include <asm/semaphore.h>
- #include <asm/uaccess.h>
- MODULE_AUTHOR("Jeff Garzik");
- MODULE_LICENSE("GPL");
- MODULE_DESCRIPTION("Promise SATA SX8 block driver");
- #if 0
- #define CARM_DEBUG
- #define CARM_VERBOSE_DEBUG
- #else
- #undef CARM_DEBUG
- #undef CARM_VERBOSE_DEBUG
- #endif
- #undef CARM_NDEBUG
- #define DRV_NAME "sx8"
- #define DRV_VERSION "0.8"
- #define PFX DRV_NAME ": "
- #define NEXT_RESP(idx) ((idx + 1) % RMSG_Q_LEN)
- /* 0xf is just arbitrary, non-zero noise; this is sorta like poisoning */
- #define TAG_ENCODE(tag) (((tag) << 16) | 0xf)
- #define TAG_DECODE(tag) (((tag) >> 16) & 0x1f)
- #define TAG_VALID(tag) ((((tag) & 0xf) == 0xf) && (TAG_DECODE(tag) < 32))
- /* note: prints function name for you */
- #ifdef CARM_DEBUG
- #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
- #ifdef CARM_VERBOSE_DEBUG
- #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
- #else
- #define VPRINTK(fmt, args...)
- #endif /* CARM_VERBOSE_DEBUG */
- #else
- #define DPRINTK(fmt, args...)
- #define VPRINTK(fmt, args...)
- #endif /* CARM_DEBUG */
- #ifdef CARM_NDEBUG
- #define assert(expr)
- #else
- #define assert(expr)
- if(unlikely(!(expr))) {
- printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%dn",
- #expr,__FILE__,__FUNCTION__,__LINE__);
- }
- #endif
- /* defines only for the constants which don't work well as enums */
- struct carm_host;
- enum {
- /* adapter-wide limits */
- CARM_MAX_PORTS = 8,
- CARM_SHM_SIZE = (4096 << 7),
- CARM_MINORS_PER_MAJOR = 256 / CARM_MAX_PORTS,
- CARM_MAX_WAIT_Q = CARM_MAX_PORTS + 1,
- /* command message queue limits */
- CARM_MAX_REQ = 64, /* max command msgs per host */
- CARM_MAX_Q = 1, /* one command at a time */
- CARM_MSG_LOW_WATER = (CARM_MAX_REQ / 4), /* refill mark */
- /* S/G limits, host-wide and per-request */
- CARM_MAX_REQ_SG = 32, /* max s/g entries per request */
- CARM_SG_BOUNDARY = 0xffffUL, /* s/g segment boundary */
- CARM_MAX_HOST_SG = 600, /* max s/g entries per host */
- CARM_SG_LOW_WATER = (CARM_MAX_HOST_SG / 4), /* re-fill mark */
- /* hardware registers */
- CARM_IHQP = 0x1c,
- CARM_INT_STAT = 0x10, /* interrupt status */
- CARM_INT_MASK = 0x14, /* interrupt mask */
- CARM_HMUC = 0x18, /* host message unit control */
- RBUF_ADDR_LO = 0x20, /* response msg DMA buf low 32 bits */
- RBUF_ADDR_HI = 0x24, /* response msg DMA buf high 32 bits */
- RBUF_BYTE_SZ = 0x28,
- CARM_RESP_IDX = 0x2c,
- CARM_CMS0 = 0x30, /* command message size reg 0 */
- CARM_LMUC = 0x48,
- CARM_HMPHA = 0x6c,
- CARM_INITC = 0xb5,
- /* bits in CARM_INT_{STAT,MASK} */
- INT_RESERVED = 0xfffffff0,
- INT_WATCHDOG = (1 << 3), /* watchdog timer */
- INT_Q_OVERFLOW = (1 << 2), /* cmd msg q overflow */
- INT_Q_AVAILABLE = (1 << 1), /* cmd msg q has free space */
- INT_RESPONSE = (1 << 0), /* response msg available */
- INT_ACK_MASK = INT_WATCHDOG | INT_Q_OVERFLOW,
- INT_DEF_MASK = INT_RESERVED | INT_Q_OVERFLOW |
- INT_RESPONSE,
- /* command messages, and related register bits */
- CARM_HAVE_RESP = 0x01,
- CARM_MSG_READ = 1,
- CARM_MSG_WRITE = 2,
- CARM_MSG_VERIFY = 3,
- CARM_MSG_GET_CAPACITY = 4,
- CARM_MSG_FLUSH = 5,
- CARM_MSG_IOCTL = 6,
- CARM_MSG_ARRAY = 8,
- CARM_MSG_MISC = 9,
- CARM_CME = (1 << 2),
- CARM_RME = (1 << 1),
- CARM_WZBC = (1 << 0),
- CARM_RMI = (1 << 0),
- CARM_Q_FULL = (1 << 3),
- CARM_MSG_SIZE = 288,
- CARM_Q_LEN = 48,
- /* CARM_MSG_IOCTL messages */
- CARM_IOC_SCAN_CHAN = 5, /* scan channels for devices */
- CARM_IOC_GET_TCQ = 13, /* get tcq/ncq depth */
- CARM_IOC_SET_TCQ = 14, /* set tcq/ncq depth */
- IOC_SCAN_CHAN_NODEV = 0x1f,
- IOC_SCAN_CHAN_OFFSET = 0x40,
- /* CARM_MSG_ARRAY messages */
- CARM_ARRAY_INFO = 0,
- ARRAY_NO_EXIST = (1 << 31),
- /* response messages */
- RMSG_SZ = 8, /* sizeof(struct carm_response) */
- RMSG_Q_LEN = 48, /* resp. msg list length */
- RMSG_OK = 1, /* bit indicating msg was successful */
- /* length of entire resp. msg buffer */
- RBUF_LEN = RMSG_SZ * RMSG_Q_LEN,
- PDC_SHM_SIZE = (4096 << 7), /* length of entire h/w buffer */
- /* CARM_MSG_MISC messages */
- MISC_GET_FW_VER = 2,
- MISC_ALLOC_MEM = 3,
- MISC_SET_TIME = 5,
- /* MISC_GET_FW_VER feature bits */
- FW_VER_4PORT = (1 << 2), /* 1=4 ports, 0=8 ports */
- FW_VER_NON_RAID = (1 << 1), /* 1=non-RAID firmware, 0=RAID */
- FW_VER_ZCR = (1 << 0), /* zero channel RAID (whatever that is) */
- /* carm_host flags */
- FL_NON_RAID = FW_VER_NON_RAID,
- FL_4PORT = FW_VER_4PORT,
- FL_FW_VER_MASK = (FW_VER_NON_RAID | FW_VER_4PORT),
- FL_DAC = (1 << 16),
- FL_DYN_MAJOR = (1 << 17),
- };
- enum scatter_gather_types {
- SGT_32BIT = 0,
- SGT_64BIT = 1,
- };
- enum host_states {
- HST_INVALID, /* invalid state; never used */
- HST_ALLOC_BUF, /* setting up master SHM area */
- HST_ERROR, /* we never leave here */
- HST_PORT_SCAN, /* start dev scan */
- HST_DEV_SCAN_START, /* start per-device probe */
- HST_DEV_SCAN, /* continue per-device probe */
- HST_DEV_ACTIVATE, /* activate devices we found */
- HST_PROBE_FINISHED, /* probe is complete */
- HST_PROBE_START, /* initiate probe */
- HST_SYNC_TIME, /* tell firmware what time it is */
- HST_GET_FW_VER, /* get firmware version, adapter port cnt */
- };
- #ifdef CARM_DEBUG
- static const char *state_name[] = {
- "HST_INVALID",
- "HST_ALLOC_BUF",
- "HST_ERROR",
- "HST_PORT_SCAN",
- "HST_DEV_SCAN_START",
- "HST_DEV_SCAN",
- "HST_DEV_ACTIVATE",
- "HST_PROBE_FINISHED",
- "HST_PROBE_START",
- "HST_SYNC_TIME",
- "HST_GET_FW_VER",
- };
- #endif
- struct carm_port {
- unsigned int port_no;
- unsigned int n_queued;
- struct gendisk *disk;
- struct carm_host *host;
- /* attached device characteristics */
- u64 capacity;
- char name[41];
- u16 dev_geom_head;
- u16 dev_geom_sect;
- u16 dev_geom_cyl;
- };
- struct carm_request {
- unsigned int tag;
- int n_elem;
- unsigned int msg_type;
- unsigned int msg_subtype;
- unsigned int msg_bucket;
- struct request *rq;
- struct carm_port *port;
- struct scatterlist sg[CARM_MAX_REQ_SG];
- };
- struct carm_host {
- unsigned long flags;
- void __iomem *mmio;
- void *shm;
- dma_addr_t shm_dma;
- int major;
- int id;
- char name[32];
- spinlock_t lock;
- struct pci_dev *pdev;
- unsigned int state;
- u32 fw_ver;
- request_queue_t *oob_q;
- unsigned int n_oob;
- unsigned int hw_sg_used;
- unsigned int resp_idx;
- unsigned int wait_q_prod;
- unsigned int wait_q_cons;
- request_queue_t *wait_q[CARM_MAX_WAIT_Q];
- unsigned int n_msgs;
- u64 msg_alloc;
- struct carm_request req[CARM_MAX_REQ];
- void *msg_base;
- dma_addr_t msg_dma;
- int cur_scan_dev;
- unsigned long dev_active;
- unsigned long dev_present;
- struct carm_port port[CARM_MAX_PORTS];
- struct work_struct fsm_task;
- struct semaphore probe_sem;
- };
- struct carm_response {
- __le32 ret_handle;
- __le32 status;
- } __attribute__((packed));
- struct carm_msg_sg {
- __le32 start;
- __le32 len;
- } __attribute__((packed));
- struct carm_msg_rw {
- u8 type;
- u8 id;
- u8 sg_count;
- u8 sg_type;
- __le32 handle;
- __le32 lba;
- __le16 lba_count;
- __le16 lba_high;
- struct carm_msg_sg sg[32];
- } __attribute__((packed));
- struct carm_msg_allocbuf {
- u8 type;
- u8 subtype;
- u8 n_sg;
- u8 sg_type;
- __le32 handle;
- __le32 addr;
- __le32 len;
- __le32 evt_pool;
- __le32 n_evt;
- __le32 rbuf_pool;
- __le32 n_rbuf;
- __le32 msg_pool;
- __le32 n_msg;
- struct carm_msg_sg sg[8];
- } __attribute__((packed));
- struct carm_msg_ioctl {
- u8 type;
- u8 subtype;
- u8 array_id;
- u8 reserved1;
- __le32 handle;
- __le32 data_addr;
- u32 reserved2;
- } __attribute__((packed));
- struct carm_msg_sync_time {
- u8 type;
- u8 subtype;
- u16 reserved1;
- __le32 handle;
- u32 reserved2;
- __le32 timestamp;
- } __attribute__((packed));
- struct carm_msg_get_fw_ver {
- u8 type;
- u8 subtype;
- u16 reserved1;
- __le32 handle;
- __le32 data_addr;
- u32 reserved2;
- } __attribute__((packed));
- struct carm_fw_ver {
- __le32 version;
- u8 features;
- u8 reserved1;
- u16 reserved2;
- } __attribute__((packed));
- struct carm_array_info {
- __le32 size;
- __le16 size_hi;
- __le16 stripe_size;
- __le32 mode;
- __le16 stripe_blk_sz;
- __le16 reserved1;
- __le16 cyl;
- __le16 head;
- __le16 sect;
- u8 array_id;
- u8 reserved2;
- char name[40];
- __le32 array_status;
- /* device list continues beyond this point? */
- } __attribute__((packed));
- static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
- static void carm_remove_one (struct pci_dev *pdev);
- static int carm_bdev_ioctl(struct inode *ino, struct file *fil,
- unsigned int cmd, unsigned long arg);
- static struct pci_device_id carm_pci_tbl[] = {
- { PCI_VENDOR_ID_PROMISE, 0x8000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
- { PCI_VENDOR_ID_PROMISE, 0x8002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
- { } /* terminate list */
- };
- MODULE_DEVICE_TABLE(pci, carm_pci_tbl);
- static struct pci_driver carm_driver = {
- .name = DRV_NAME,
- .id_table = carm_pci_tbl,
- .probe = carm_init_one,
- .remove = carm_remove_one,
- };
- static struct block_device_operations carm_bd_ops = {
- .owner = THIS_MODULE,
- .ioctl = carm_bdev_ioctl,
- };
- static unsigned int carm_host_id;
- static unsigned long carm_major_alloc;
- static int carm_bdev_ioctl(struct inode *ino, struct file *fil,
- unsigned int cmd, unsigned long arg)
- {
- void __user *usermem = (void __user *) arg;
- struct carm_port *port = ino->i_bdev->bd_disk->private_data;
- struct hd_geometry geom;
- switch (cmd) {
- case HDIO_GETGEO:
- if (!usermem)
- return -EINVAL;
- geom.heads = (u8) port->dev_geom_head;
- geom.sectors = (u8) port->dev_geom_sect;
- geom.cylinders = port->dev_geom_cyl;
- geom.start = get_start_sect(ino->i_bdev);
- if (copy_to_user(usermem, &geom, sizeof(geom)))
- return -EFAULT;
- return 0;
- default:
- break;
- }
- return -EOPNOTSUPP;
- }
- static const u32 msg_sizes[] = { 32, 64, 128, CARM_MSG_SIZE };
- static inline int carm_lookup_bucket(u32 msg_size)
- {
- int i;
- for (i = 0; i < ARRAY_SIZE(msg_sizes); i++)
- if (msg_size <= msg_sizes[i])
- return i;
- return -ENOENT;
- }
- static void carm_init_buckets(void __iomem *mmio)
- {
- unsigned int i;
- for (i = 0; i < ARRAY_SIZE(msg_sizes); i++)
- writel(msg_sizes[i], mmio + CARM_CMS0 + (4 * i));
- }
- static inline void *carm_ref_msg(struct carm_host *host,
- unsigned int msg_idx)
- {
- return host->msg_base + (msg_idx * CARM_MSG_SIZE);
- }
- static inline dma_addr_t carm_ref_msg_dma(struct carm_host *host,
- unsigned int msg_idx)
- {
- return host->msg_dma + (msg_idx * CARM_MSG_SIZE);
- }
- static int carm_send_msg(struct carm_host *host,
- struct carm_request *crq)
- {
- void __iomem *mmio = host->mmio;
- u32 msg = (u32) carm_ref_msg_dma(host, crq->tag);
- u32 cm_bucket = crq->msg_bucket;
- u32 tmp;
- int rc = 0;
- VPRINTK("ENTERn");
- tmp = readl(mmio + CARM_HMUC);
- if (tmp & CARM_Q_FULL) {
- #if 0
- tmp = readl(mmio + CARM_INT_MASK);
- tmp |= INT_Q_AVAILABLE;
- writel(tmp, mmio + CARM_INT_MASK);
- readl(mmio + CARM_INT_MASK); /* flush */
- #endif
- DPRINTK("host msg queue fulln");
- rc = -EBUSY;
- } else {
- writel(msg | (cm_bucket << 1), mmio + CARM_IHQP);
- readl(mmio + CARM_IHQP); /* flush */
- }
- return rc;
- }
- static struct carm_request *carm_get_request(struct carm_host *host)
- {
- unsigned int i;
- /* obey global hardware limit on S/G entries */
- if (host->hw_sg_used >= (CARM_MAX_HOST_SG - CARM_MAX_REQ_SG))
- return NULL;
- for (i = 0; i < CARM_MAX_Q; i++)
- if ((host->msg_alloc & (1ULL << i)) == 0) {
- struct carm_request *crq = &host->req[i];
- crq->port = NULL;
- crq->n_elem = 0;
- host->msg_alloc |= (1ULL << i);
- host->n_msgs++;
- assert(host->n_msgs <= CARM_MAX_REQ);
- return crq;
- }
- DPRINTK("no request available, returning NULLn");
- return NULL;
- }
- static int carm_put_request(struct carm_host *host, struct carm_request *crq)
- {
- assert(crq->tag < CARM_MAX_Q);
- if (unlikely((host->msg_alloc & (1ULL << crq->tag)) == 0))
- return -EINVAL; /* tried to clear a tag that was not active */
- assert(host->hw_sg_used >= crq->n_elem);
- host->msg_alloc &= ~(1ULL << crq->tag);
- host->hw_sg_used -= crq->n_elem;
- host->n_msgs--;
- return 0;
- }
- static struct carm_request *carm_get_special(struct carm_host *host)
- {
- unsigned long flags;
- struct carm_request *crq = NULL;
- struct request *rq;
- int tries = 5000;
- while (tries-- > 0) {
- spin_lock_irqsave(&host->lock, flags);
- crq = carm_get_request(host);
- spin_unlock_irqrestore(&host->lock, flags);
- if (crq)
- break;
- msleep(10);
- }
- if (!crq)
- return NULL;
- rq = blk_get_request(host->oob_q, WRITE /* bogus */, GFP_KERNEL);
- if (!rq) {
- spin_lock_irqsave(&host->lock, flags);
- carm_put_request(host, crq);
- spin_unlock_irqrestore(&host->lock, flags);
- return NULL;
- }
- crq->rq = rq;
- return crq;
- }
- static int carm_array_info (struct carm_host *host, unsigned int array_idx)
- {
- struct carm_msg_ioctl *ioc;
- unsigned int idx;
- u32 msg_data;
- dma_addr_t msg_dma;
- struct carm_request *crq;
- int rc;
- crq = carm_get_special(host);
- if (!crq) {
- rc = -ENOMEM;
- goto err_out;
- }
- idx = crq->tag;
- ioc = carm_ref_msg(host, idx);
- msg_dma = carm_ref_msg_dma(host, idx);
- msg_data = (u32) (msg_dma + sizeof(struct carm_array_info));
- crq->msg_type = CARM_MSG_ARRAY;
- crq->msg_subtype = CARM_ARRAY_INFO;
- rc = carm_lookup_bucket(sizeof(struct carm_msg_ioctl) +
- sizeof(struct carm_array_info));
- BUG_ON(rc < 0);
- crq->msg_bucket = (u32) rc;
- memset(ioc, 0, sizeof(*ioc));
- ioc->type = CARM_MSG_ARRAY;
- ioc->subtype = CARM_ARRAY_INFO;
- ioc->array_id = (u8) array_idx;
- ioc->handle = cpu_to_le32(TAG_ENCODE(idx));
- ioc->data_addr = cpu_to_le32(msg_data);
- spin_lock_irq(&host->lock);
- assert(host->state == HST_DEV_SCAN_START ||
- host->state == HST_DEV_SCAN);
- spin_unlock_irq(&host->lock);
- DPRINTK("blk_insert_request, tag == %un", idx);
- blk_insert_request(host->oob_q, crq->rq, 1, crq);
- return 0;
- err_out:
- spin_lock_irq(&host->lock);
- host->state = HST_ERROR;
- spin_unlock_irq(&host->lock);
- return rc;
- }
- typedef unsigned int (*carm_sspc_t)(struct carm_host *, unsigned int, void *);
- static int carm_send_special (struct carm_host *host, carm_sspc_t func)
- {
- struct carm_request *crq;
- struct carm_msg_ioctl *ioc;
- void *mem;
- unsigned int idx, msg_size;
- int rc;
- crq = carm_get_special(host);
- if (!crq)
- return -ENOMEM;
- idx = crq->tag;
- mem = carm_ref_msg(host, idx);
- msg_size = func(host, idx, mem);
- ioc = mem;
- crq->msg_type = ioc->type;
- crq->msg_subtype = ioc->subtype;
- rc = carm_lookup_bucket(msg_size);
- BUG_ON(rc < 0);
- crq->msg_bucket = (u32) rc;
- DPRINTK("blk_insert_request, tag == %un", idx);
- blk_insert_request(host->oob_q, crq->rq, 1, crq);
- return 0;
- }
- static unsigned int carm_fill_sync_time(struct carm_host *host,
- unsigned int idx, void *mem)
- {
- struct timeval tv;
- struct carm_msg_sync_time *st = mem;
- do_gettimeofday(&tv);
- memset(st, 0, sizeof(*st));
- st->type = CARM_MSG_MISC;
- st->subtype = MISC_SET_TIME;
- st->handle = cpu_to_le32(TAG_ENCODE(idx));
- st->timestamp = cpu_to_le32(tv.tv_sec);
- return sizeof(struct carm_msg_sync_time);
- }
- static unsigned int carm_fill_alloc_buf(struct carm_host *host,
- unsigned int idx, void *mem)
- {
- struct carm_msg_allocbuf *ab = mem;
- memset(ab, 0, sizeof(*ab));
- ab->type = CARM_MSG_MISC;
- ab->subtype = MISC_ALLOC_MEM;
- ab->handle = cpu_to_le32(TAG_ENCODE(idx));
- ab->n_sg = 1;
- ab->sg_type = SGT_32BIT;
- ab->addr = cpu_to_le32(host->shm_dma + (PDC_SHM_SIZE >> 1));
- ab->len = cpu_to_le32(PDC_SHM_SIZE >> 1);
- ab->evt_pool = cpu_to_le32(host->shm_dma + (16 * 1024));
- ab->n_evt = cpu_to_le32(1024);
- ab->rbuf_pool = cpu_to_le32(host->shm_dma);
- ab->n_rbuf = cpu_to_le32(RMSG_Q_LEN);
- ab->msg_pool = cpu_to_le32(host->shm_dma + RBUF_LEN);
- ab->n_msg = cpu_to_le32(CARM_Q_LEN);
- ab->sg[0].start = cpu_to_le32(host->shm_dma + (PDC_SHM_SIZE >> 1));
- ab->sg[0].len = cpu_to_le32(65536);
- return sizeof(struct carm_msg_allocbuf);
- }
- static unsigned int carm_fill_scan_channels(struct carm_host *host,
- unsigned int idx, void *mem)
- {
- struct carm_msg_ioctl *ioc = mem;
- u32 msg_data = (u32) (carm_ref_msg_dma(host, idx) +
- IOC_SCAN_CHAN_OFFSET);
- memset(ioc, 0, sizeof(*ioc));
- ioc->type = CARM_MSG_IOCTL;
- ioc->subtype = CARM_IOC_SCAN_CHAN;
- ioc->handle = cpu_to_le32(TAG_ENCODE(idx));
- ioc->data_addr = cpu_to_le32(msg_data);
- /* fill output data area with "no device" default values */
- mem += IOC_SCAN_CHAN_OFFSET;
- memset(mem, IOC_SCAN_CHAN_NODEV, CARM_MAX_PORTS);
- return IOC_SCAN_CHAN_OFFSET + CARM_MAX_PORTS;
- }
- static unsigned int carm_fill_get_fw_ver(struct carm_host *host,
- unsigned int idx, void *mem)
- {
- struct carm_msg_get_fw_ver *ioc = mem;
- u32 msg_data = (u32) (carm_ref_msg_dma(host, idx) + sizeof(*ioc));
- memset(ioc, 0, sizeof(*ioc));
- ioc->type = CARM_MSG_MISC;
- ioc->subtype = MISC_GET_FW_VER;
- ioc->handle = cpu_to_le32(TAG_ENCODE(idx));
- ioc->data_addr = cpu_to_le32(msg_data);
- return sizeof(struct carm_msg_get_fw_ver) +
- sizeof(struct carm_fw_ver);
- }
- static inline void carm_end_request_queued(struct carm_host *host,
- struct carm_request *crq,
- int uptodate)
- {
- struct request *req = crq->rq;
- int rc;
- rc = end_that_request_first(req, uptodate, req->hard_nr_sectors);
- assert(rc == 0);
- end_that_request_last(req);
- rc = carm_put_request(host, crq);
- assert(rc == 0);
- }
- static inline void carm_push_q (struct carm_host *host, request_queue_t *q)
- {
- unsigned int idx = host->wait_q_prod % CARM_MAX_WAIT_Q;
- blk_stop_queue(q);
- VPRINTK("STOPPED QUEUE %pn", q);
- host->wait_q[idx] = q;
- host->wait_q_prod++;
- BUG_ON(host->wait_q_prod == host->wait_q_cons); /* overrun */
- }
- static inline request_queue_t *carm_pop_q(struct carm_host *host)
- {
- unsigned int idx;
- if (host->wait_q_prod == host->wait_q_cons)
- return NULL;
- idx = host->wait_q_cons % CARM_MAX_WAIT_Q;
- host->wait_q_cons++;
- return host->wait_q[idx];
- }
- static inline void carm_round_robin(struct carm_host *host)
- {
- request_queue_t *q = carm_pop_q(host);
- if (q) {
- blk_start_queue(q);
- VPRINTK("STARTED QUEUE %pn", q);
- }
- }
- static inline void carm_end_rq(struct carm_host *host, struct carm_request *crq,
- int is_ok)
- {
- carm_end_request_queued(host, crq, is_ok);
- if (CARM_MAX_Q == 1)
- carm_round_robin(host);
- else if ((host->n_msgs <= CARM_MSG_LOW_WATER) &&
- (host->hw_sg_used <= CARM_SG_LOW_WATER)) {
- carm_round_robin(host);
- }
- }
- static void carm_oob_rq_fn(request_queue_t *q)
- {
- struct carm_host *host = q->queuedata;
- struct carm_request *crq;
- struct request *rq;
- int rc;
- while (1) {
- DPRINTK("get reqn");
- rq = elv_next_request(q);
- if (!rq)
- break;
- blkdev_dequeue_request(rq);
- crq = rq->special;
- assert(crq != NULL);
- assert(crq->rq == rq);
- crq->n_elem = 0;
- DPRINTK("send reqn");
- rc = carm_send_msg(host, crq);
- if (rc) {
- blk_requeue_request(q, rq);
- carm_push_q(host, q);
- return; /* call us again later, eventually */
- }
- }
- }
- static void carm_rq_fn(request_queue_t *q)
- {
- struct carm_port *port = q->queuedata;
- struct carm_host *host = port->host;
- struct carm_msg_rw *msg;
- struct carm_request *crq;
- struct request *rq;
- struct scatterlist *sg;
- int writing = 0, pci_dir, i, n_elem, rc;
- u32 tmp;
- unsigned int msg_size;
- queue_one_request:
- VPRINTK("get reqn");
- rq = elv_next_request(q);
- if (!rq)
- return;
- crq = carm_get_request(host);
- if (!crq) {
- carm_push_q(host, q);
- return; /* call us again later, eventually */
- }
- crq->rq = rq;
- blkdev_dequeue_request(rq);
- if (rq_data_dir(rq) == WRITE) {
- writing = 1;
- pci_dir = PCI_DMA_TODEVICE;
- } else {
- pci_dir = PCI_DMA_FROMDEVICE;
- }
- /* get scatterlist from block layer */
- sg = &crq->sg[0];
- n_elem = blk_rq_map_sg(q, rq, sg);
- if (n_elem <= 0) {
- carm_end_rq(host, crq, 0);
- return; /* request with no s/g entries? */
- }
- /* map scatterlist to PCI bus addresses */
- n_elem = pci_map_sg(host->pdev, sg, n_elem, pci_dir);
- if (n_elem <= 0) {
- carm_end_rq(host, crq, 0);
- return; /* request with no s/g entries? */
- }
- crq->n_elem = n_elem;
- crq->port = port;
- host->hw_sg_used += n_elem;
- /*
- * build read/write message
- */
- VPRINTK("build msgn");
- msg = (struct carm_msg_rw *) carm_ref_msg(host, crq->tag);
- if (writing) {
- msg->type = CARM_MSG_WRITE;
- crq->msg_type = CARM_MSG_WRITE;
- } else {
- msg->type = CARM_MSG_READ;
- crq->msg_type = CARM_MSG_READ;
- }
- msg->id = port->port_no;
- msg->sg_count = n_elem;
- msg->sg_type = SGT_32BIT;
- msg->handle = cpu_to_le32(TAG_ENCODE(crq->tag));
- msg->lba = cpu_to_le32(rq->sector & 0xffffffff);
- tmp = (rq->sector >> 16) >> 16;
- msg->lba_high = cpu_to_le16( (u16) tmp );
- msg->lba_count = cpu_to_le16(rq->nr_sectors);
- msg_size = sizeof(struct carm_msg_rw) - sizeof(msg->sg);
- for (i = 0; i < n_elem; i++) {
- struct carm_msg_sg *carm_sg = &msg->sg[i];
- carm_sg->start = cpu_to_le32(sg_dma_address(&crq->sg[i]));
- carm_sg->len = cpu_to_le32(sg_dma_len(&crq->sg[i]));
- msg_size += sizeof(struct carm_msg_sg);
- }
- rc = carm_lookup_bucket(msg_size);
- BUG_ON(rc < 0);
- crq->msg_bucket = (u32) rc;
- /*
- * queue read/write message to hardware
- */
- VPRINTK("send msg, tag == %un", crq->tag);
- rc = carm_send_msg(host, crq);
- if (rc) {
- carm_put_request(host, crq);
- blk_requeue_request(q, rq);
- carm_push_q(host, q);
- return; /* call us again later, eventually */
- }
- goto queue_one_request;
- }
- static void carm_handle_array_info(struct carm_host *host,
- struct carm_request *crq, u8 *mem,
- int is_ok)
- {
- struct carm_port *port;
- u8 *msg_data = mem + sizeof(struct carm_array_info);
- struct carm_array_info *desc = (struct carm_array_info *) msg_data;
- u64 lo, hi;
- int cur_port;
- size_t slen;
- DPRINTK("ENTERn");
- carm_end_rq(host, crq, is_ok);
- if (!is_ok)
- goto out;
- if (le32_to_cpu(desc->array_status) & ARRAY_NO_EXIST)
- goto out;
- cur_port = host->cur_scan_dev;
- /* should never occur */
- if ((cur_port < 0) || (cur_port >= CARM_MAX_PORTS)) {
- printk(KERN_ERR PFX "BUG: cur_scan_dev==%d, array_id==%dn",
- cur_port, (int) desc->array_id);
- goto out;
- }
- port = &host->port[cur_port];
- lo = (u64) le32_to_cpu(desc->size);
- hi = (u64) le16_to_cpu(desc->size_hi);
- port->capacity = lo | (hi << 32);
- port->dev_geom_head = le16_to_cpu(desc->head);
- port->dev_geom_sect = le16_to_cpu(desc->sect);
- port->dev_geom_cyl = le16_to_cpu(desc->cyl);
- host->dev_active |= (1 << cur_port);
- strncpy(port->name, desc->name, sizeof(port->name));
- port->name[sizeof(port->name) - 1] = 0;
- slen = strlen(port->name);
- while (slen && (port->name[slen - 1] == ' ')) {
- port->name[slen - 1] = 0;
- slen--;
- }
- printk(KERN_INFO DRV_NAME "(%s): port %u device %Lu sectorsn",
- pci_name(host->pdev), port->port_no,
- (unsigned long long) port->capacity);
- printk(KERN_INFO DRV_NAME "(%s): port %u device "%s"n",
- pci_name(host->pdev), port->port_no, port->name);
- out:
- assert(host->state == HST_DEV_SCAN);
- schedule_work(&host->fsm_task);
- }
- static void carm_handle_scan_chan(struct carm_host *host,
- struct carm_request *crq, u8 *mem,
- int is_ok)
- {
- u8 *msg_data = mem + IOC_SCAN_CHAN_OFFSET;
- unsigned int i, dev_count = 0;
- int new_state = HST_DEV_SCAN_START;
- DPRINTK("ENTERn");
- carm_end_rq(host, crq, is_ok);
- if (!is_ok) {
- new_state = HST_ERROR;
- goto out;
- }
- /* TODO: scan and support non-disk devices */
- for (i = 0; i < 8; i++)
- if (msg_data[i] == 0) { /* direct-access device (disk) */
- host->dev_present |= (1 << i);
- dev_count++;
- }
- printk(KERN_INFO DRV_NAME "(%s): found %u interesting devicesn",
- pci_name(host->pdev), dev_count);
- out:
- assert(host->state == HST_PORT_SCAN);
- host->state = new_state;
- schedule_work(&host->fsm_task);
- }
- static void carm_handle_generic(struct carm_host *host,
- struct carm_request *crq, int is_ok,
- int cur_state, int next_state)
- {
- DPRINTK("ENTERn");
- carm_end_rq(host, crq, is_ok);
- assert(host->state == cur_state);
- if (is_ok)
- host->state = next_state;
- else
- host->state = HST_ERROR;
- schedule_work(&host->fsm_task);
- }
- static inline void carm_handle_rw(struct carm_host *host,
- struct carm_request *crq, int is_ok)
- {
- int pci_dir;
- VPRINTK("ENTERn");
- if (rq_data_dir(crq->rq) == WRITE)
- pci_dir = PCI_DMA_TODEVICE;
- else
- pci_dir = PCI_DMA_FROMDEVICE;
- pci_unmap_sg(host->pdev, &crq->sg[0], crq->n_elem, pci_dir);
- carm_end_rq(host, crq, is_ok);
- }
- static inline void carm_handle_resp(struct carm_host *host,
- __le32 ret_handle_le, u32 status)
- {
- u32 handle = le32_to_cpu(ret_handle_le);
- unsigned int msg_idx;
- struct carm_request *crq;
- int is_ok = (status == RMSG_OK);
- u8 *mem;
- VPRINTK("ENTER, handle == 0x%xn", handle);
- if (unlikely(!TAG_VALID(handle))) {
- printk(KERN_ERR DRV_NAME "(%s): BUG: invalid tag 0x%xn",
- pci_name(host->pdev), handle);
- return;
- }
- msg_idx = TAG_DECODE(handle);
- VPRINTK("tag == %un", msg_idx);
- crq = &host->req[msg_idx];
- /* fast path */
- if (likely(crq->msg_type == CARM_MSG_READ ||
- crq->msg_type == CARM_MSG_WRITE)) {
- carm_handle_rw(host, crq, is_ok);
- return;
- }
- mem = carm_ref_msg(host, msg_idx);
- switch (crq->msg_type) {
- case CARM_MSG_IOCTL: {
- switch (crq->msg_subtype) {
- case CARM_IOC_SCAN_CHAN:
- carm_handle_scan_chan(host, crq, mem, is_ok);
- break;
- default:
- /* unknown / invalid response */
- goto err_out;
- }
- break;
- }
- case CARM_MSG_MISC: {
- switch (crq->msg_subtype) {
- case MISC_ALLOC_MEM:
- carm_handle_generic(host, crq, is_ok,
- HST_ALLOC_BUF, HST_SYNC_TIME);
- break;
- case MISC_SET_TIME:
- carm_handle_generic(host, crq, is_ok,
- HST_SYNC_TIME, HST_GET_FW_VER);
- break;
- case MISC_GET_FW_VER: {
- struct carm_fw_ver *ver = (struct carm_fw_ver *)
- mem + sizeof(struct carm_msg_get_fw_ver);
- if (is_ok) {
- host->fw_ver = le32_to_cpu(ver->version);
- host->flags |= (ver->features & FL_FW_VER_MASK);
- }
- carm_handle_generic(host, crq, is_ok,
- HST_GET_FW_VER, HST_PORT_SCAN);
- break;
- }
- default:
- /* unknown / invalid response */
- goto err_out;
- }
- break;
- }
- case CARM_MSG_ARRAY: {
- switch (crq->msg_subtype) {
- case CARM_ARRAY_INFO:
- carm_handle_array_info(host, crq, mem, is_ok);
- break;
- default:
- /* unknown / invalid response */
- goto err_out;
- }
- break;
- }
- default:
- /* unknown / invalid response */
- goto err_out;
- }
- return;
- err_out:
- printk(KERN_WARNING DRV_NAME "(%s): BUG: unhandled message type %d/%dn",
- pci_name(host->pdev), crq->msg_type, crq->msg_subtype);
- carm_end_rq(host, crq, 0);
- }
- static inline void carm_handle_responses(struct carm_host *host)
- {
- void __iomem *mmio = host->mmio;
- struct carm_response *resp = (struct carm_response *) host->shm;
- unsigned int work = 0;
- unsigned int idx = host->resp_idx % RMSG_Q_LEN;
- while (1) {
- u32 status = le32_to_cpu(resp[idx].status);
- if (status == 0xffffffff) {
- VPRINTK("ending response on index %un", idx);
- writel(idx << 3, mmio + CARM_RESP_IDX);
- break;
- }
- /* response to a message we sent */
- else if ((status & (1 << 31)) == 0) {
- VPRINTK("handling msg response on index %un", idx);
- carm_handle_resp(host, resp[idx].ret_handle, status);
- resp[idx].status = cpu_to_le32(0xffffffff);
- }
- /* asynchronous events the hardware throws our way */
- else if ((status & 0xff000000) == (1 << 31)) {
- u8 *evt_type_ptr = (u8 *) &resp[idx];
- u8 evt_type = *evt_type_ptr;
- printk(KERN_WARNING DRV_NAME "(%s): unhandled event type %dn",
- pci_name(host->pdev), (int) evt_type);
- resp[idx].status = cpu_to_le32(0xffffffff);
- }
- idx = NEXT_RESP(idx);
- work++;
- }
- VPRINTK("EXIT, work==%un", work);
- host->resp_idx += work;
- }
- static irqreturn_t carm_interrupt(int irq, void *__host, struct pt_regs *regs)
- {
- struct carm_host *host = __host;
- void __iomem *mmio;
- u32 mask;
- int handled = 0;
- unsigned long flags;
- if (!host) {
- VPRINTK("no hostn");
- return IRQ_NONE;
- }
- spin_lock_irqsave(&host->lock, flags);
- mmio = host->mmio;
- /* reading should also clear interrupts */
- mask = readl(mmio + CARM_INT_STAT);
- if (mask == 0 || mask == 0xffffffff) {
- VPRINTK("no work, mask == 0x%xn", mask);
- goto out;
- }
- if (mask & INT_ACK_MASK)
- writel(mask, mmio + CARM_INT_STAT);
- if (unlikely(host->state == HST_INVALID)) {
- VPRINTK("not initialized yet, mask = 0x%xn", mask);
- goto out;
- }
- if (mask & CARM_HAVE_RESP) {
- handled = 1;
- carm_handle_responses(host);
- }
- out:
- spin_unlock_irqrestore(&host->lock, flags);
- VPRINTK("EXITn");
- return IRQ_RETVAL(handled);
- }
- static void carm_fsm_task (void *_data)
- {
- struct carm_host *host = _data;
- unsigned long flags;
- unsigned int state;
- int rc, i, next_dev;
- int reschedule = 0;
- int new_state = HST_INVALID;
- spin_lock_irqsave(&host->lock, flags);
- state = host->state;
- spin_unlock_irqrestore(&host->lock, flags);
- DPRINTK("ENTER, state == %sn", state_name[state]);
- switch (state) {
- case HST_PROBE_START:
- new_state = HST_ALLOC_BUF;
- reschedule = 1;
- break;
- case HST_ALLOC_BUF:
- rc = carm_send_special(host, carm_fill_alloc_buf);
- if (rc) {
- new_state = HST_ERROR;
- reschedule = 1;
- }
- break;
- case HST_SYNC_TIME:
- rc = carm_send_special(host, carm_fill_sync_time);
- if (rc) {
- new_state = HST_ERROR;
- reschedule = 1;
- }
- break;
- case HST_GET_FW_VER:
- rc = carm_send_special(host, carm_fill_get_fw_ver);
- if (rc) {
- new_state = HST_ERROR;
- reschedule = 1;
- }
- break;
- case HST_PORT_SCAN:
- rc = carm_send_special(host, carm_fill_scan_channels);
- if (rc) {
- new_state = HST_ERROR;
- reschedule = 1;
- }
- break;
- case HST_DEV_SCAN_START:
- host->cur_scan_dev = -1;
- new_state = HST_DEV_SCAN;
- reschedule = 1;
- break;
- case HST_DEV_SCAN:
- next_dev = -1;
- for (i = host->cur_scan_dev + 1; i < CARM_MAX_PORTS; i++)
- if (host->dev_present & (1 << i)) {
- next_dev = i;
- break;
- }
- if (next_dev >= 0) {
- host->cur_scan_dev = next_dev;
- rc = carm_array_info(host, next_dev);
- if (rc) {
- new_state = HST_ERROR;
- reschedule = 1;
- }
- } else {
- new_state = HST_DEV_ACTIVATE;
- reschedule = 1;
- }
- break;
- case HST_DEV_ACTIVATE: {
- int activated = 0;
- for (i = 0; i < CARM_MAX_PORTS; i++)
- if (host->dev_active & (1 << i)) {
- struct carm_port *port = &host->port[i];
- struct gendisk *disk = port->disk;
- set_capacity(disk, port->capacity);
- add_disk(disk);
- activated++;
- }
- printk(KERN_INFO DRV_NAME "(%s): %d ports activatedn",
- pci_name(host->pdev), activated);
- new_state = HST_PROBE_FINISHED;
- reschedule = 1;
- break;
- }
- case HST_PROBE_FINISHED:
- up(&host->probe_sem);
- break;
- case HST_ERROR:
- /* FIXME: TODO */
- break;
- default:
- /* should never occur */
- printk(KERN_ERR PFX "BUG: unknown state %dn", state);
- assert(0);
- break;
- }
- if (new_state != HST_INVALID) {
- spin_lock_irqsave(&host->lock, flags);
- host->state = new_state;
- spin_unlock_irqrestore(&host->lock, flags);
- }
- if (reschedule)
- schedule_work(&host->fsm_task);
- }
- static int carm_init_wait(void __iomem *mmio, u32 bits, unsigned int test_bit)
- {
- unsigned int i;
- for (i = 0; i < 50000; i++) {
- u32 tmp = readl(mmio + CARM_LMUC);
- udelay(100);
- if (test_bit) {
- if ((tmp & bits) == bits)
- return 0;
- } else {
- if ((tmp & bits) == 0)
- return 0;
- }
- cond_resched();
- }
- printk(KERN_ERR PFX "carm_init_wait timeout, bits == 0x%x, test_bit == %sn",
- bits, test_bit ? "yes" : "no");
- return -EBUSY;
- }
- static void carm_init_responses(struct carm_host *host)
- {
- void __iomem *mmio = host->mmio;
- unsigned int i;
- struct carm_response *resp = (struct carm_response *) host->shm;
- for (i = 0; i < RMSG_Q_LEN; i++)
- resp[i].status = cpu_to_le32(0xffffffff);
- writel(0, mmio + CARM_RESP_IDX);
- }
- static int carm_init_host(struct carm_host *host)
- {
- void __iomem *mmio = host->mmio;
- u32 tmp;
- u8 tmp8;
- int rc;
- DPRINTK("ENTERn");
- writel(0, mmio + CARM_INT_MASK);
- tmp8 = readb(mmio + CARM_INITC);
- if (tmp8 & 0x01) {
- tmp8 &= ~0x01;
- writeb(tmp8, mmio + CARM_INITC);
- readb(mmio + CARM_INITC); /* flush */
- DPRINTK("snooze...n");
- msleep(5000);
- }
- tmp = readl(mmio + CARM_HMUC);
- if (tmp & CARM_CME) {
- DPRINTK("CME bit present, waitingn");
- rc = carm_init_wait(mmio, CARM_CME, 1);
- if (rc) {
- DPRINTK("EXIT, carm_init_wait 1 failedn");
- return rc;
- }
- }
- if (tmp & CARM_RME) {
- DPRINTK("RME bit present, waitingn");
- rc = carm_init_wait(mmio, CARM_RME, 1);
- if (rc) {
- DPRINTK("EXIT, carm_init_wait 2 failedn");
- return rc;
- }
- }
- tmp &= ~(CARM_RME | CARM_CME);
- writel(tmp, mmio + CARM_HMUC);
- readl(mmio + CARM_HMUC); /* flush */
- rc = carm_init_wait(mmio, CARM_RME | CARM_CME, 0);
- if (rc) {
- DPRINTK("EXIT, carm_init_wait 3 failedn");
- return rc;
- }
- carm_init_buckets(mmio);
- writel(host->shm_dma & 0xffffffff, mmio + RBUF_ADDR_LO);
- writel((host->shm_dma >> 16) >> 16, mmio + RBUF_ADDR_HI);
- writel(RBUF_LEN, mmio + RBUF_BYTE_SZ);
- tmp = readl(mmio + CARM_HMUC);
- tmp |= (CARM_RME | CARM_CME | CARM_WZBC);
- writel(tmp, mmio + CARM_HMUC);
- readl(mmio + CARM_HMUC); /* flush */
- rc = carm_init_wait(mmio, CARM_RME | CARM_CME, 1);
- if (rc) {
- DPRINTK("EXIT, carm_init_wait 4 failedn");
- return rc;
- }
- writel(0, mmio + CARM_HMPHA);
- writel(INT_DEF_MASK, mmio + CARM_INT_MASK);
- carm_init_responses(host);
- /* start initialization, probing state machine */
- spin_lock_irq(&host->lock);
- assert(host->state == HST_INVALID);
- host->state = HST_PROBE_START;
- spin_unlock_irq(&host->lock);
- schedule_work(&host->fsm_task);
- DPRINTK("EXITn");
- return 0;
- }
- static int carm_init_disks(struct carm_host *host)
- {
- unsigned int i;
- int rc = 0;
- for (i = 0; i < CARM_MAX_PORTS; i++) {
- struct gendisk *disk;
- request_queue_t *q;
- struct carm_port *port;
- port = &host->port[i];
- port->host = host;
- port->port_no = i;
- disk = alloc_disk(CARM_MINORS_PER_MAJOR);
- if (!disk) {
- rc = -ENOMEM;
- break;
- }
- port->disk = disk;
- sprintf(disk->disk_name, DRV_NAME "/%u",
- (unsigned int) (host->id * CARM_MAX_PORTS) + i);
- sprintf(disk->devfs_name, DRV_NAME "/%u_%u", host->id, i);
- disk->major = host->major;
- disk->first_minor = i * CARM_MINORS_PER_MAJOR;
- disk->fops = &carm_bd_ops;
- disk->private_data = port;
- q = blk_init_queue(carm_rq_fn, &host->lock);
- if (!q) {
- rc = -ENOMEM;
- break;
- }
- disk->queue = q;
- blk_queue_max_hw_segments(q, CARM_MAX_REQ_SG);
- blk_queue_max_phys_segments(q, CARM_MAX_REQ_SG);
- blk_queue_segment_boundary(q, CARM_SG_BOUNDARY);
- q->queuedata = port;
- }
- return rc;
- }
- static void carm_free_disks(struct carm_host *host)
- {
- unsigned int i;
- for (i = 0; i < CARM_MAX_PORTS; i++) {
- struct gendisk *disk = host->port[i].disk;
- if (disk) {
- request_queue_t *q = disk->queue;
- if (disk->flags & GENHD_FL_UP)
- del_gendisk(disk);
- if (q)
- blk_cleanup_queue(q);
- put_disk(disk);
- }
- }
- }
- static int carm_init_shm(struct carm_host *host)
- {
- host->shm = pci_alloc_consistent(host->pdev, CARM_SHM_SIZE,
- &host->shm_dma);
- if (!host->shm)
- return -ENOMEM;
- host->msg_base = host->shm + RBUF_LEN;
- host->msg_dma = host->shm_dma + RBUF_LEN;
- memset(host->shm, 0xff, RBUF_LEN);
- memset(host->msg_base, 0, PDC_SHM_SIZE - RBUF_LEN);
- return 0;
- }
- static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
- {
- static unsigned int printed_version;
- struct carm_host *host;
- unsigned int pci_dac;
- int rc;
- request_queue_t *q;
- unsigned int i;
- if (!printed_version++)
- printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "n");
- rc = pci_enable_device(pdev);
- if (rc)
- return rc;
- rc = pci_request_regions(pdev, DRV_NAME);
- if (rc)
- goto err_out;
- #ifdef IF_64BIT_DMA_IS_POSSIBLE /* grrrr... */
- rc = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
- if (!rc) {
- rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
- if (rc) {
- printk(KERN_ERR DRV_NAME "(%s): consistent DMA mask failuren",
- pci_name(pdev));
- goto err_out_regions;
- }
- pci_dac = 1;
- } else {
- #endif
- rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
- if (rc) {
- printk(KERN_ERR DRV_NAME "(%s): DMA mask failuren",
- pci_name(pdev));
- goto err_out_regions;
- }
- pci_dac = 0;
- #ifdef IF_64BIT_DMA_IS_POSSIBLE /* grrrr... */
- }
- #endif
- host = kmalloc(sizeof(*host), GFP_KERNEL);
- if (!host) {
- printk(KERN_ERR DRV_NAME "(%s): memory alloc failuren",
- pci_name(pdev));
- rc = -ENOMEM;
- goto err_out_regions;
- }
- memset(host, 0, sizeof(*host));
- host->pdev = pdev;
- host->flags = pci_dac ? FL_DAC : 0;
- spin_lock_init(&host->lock);
- INIT_WORK(&host->fsm_task, carm_fsm_task, host);
- init_MUTEX_LOCKED(&host->probe_sem);
- for (i = 0; i < ARRAY_SIZE(host->req); i++)
- host->req[i].tag = i;
- host->mmio = ioremap(pci_resource_start(pdev, 0),
- pci_resource_len(pdev, 0));
- if (!host->mmio) {
- printk(KERN_ERR DRV_NAME "(%s): MMIO alloc failuren",
- pci_name(pdev));
- rc = -ENOMEM;
- goto err_out_kfree;
- }
- rc = carm_init_shm(host);
- if (rc) {
- printk(KERN_ERR DRV_NAME "(%s): DMA SHM alloc failuren",
- pci_name(pdev));
- goto err_out_iounmap;
- }
- q = blk_init_queue(carm_oob_rq_fn, &host->lock);
- if (!q) {
- printk(KERN_ERR DRV_NAME "(%s): OOB queue alloc failuren",
- pci_name(pdev));
- rc = -ENOMEM;
- goto err_out_pci_free;
- }
- host->oob_q = q;
- q->queuedata = host;
- /*
- * Figure out which major to use: 160, 161, or dynamic
- */
- if (!test_and_set_bit(0, &carm_major_alloc))
- host->major = 160;
- else if (!test_and_set_bit(1, &carm_major_alloc))
- host->major = 161;
- else
- host->flags |= FL_DYN_MAJOR;
- host->id = carm_host_id;
- sprintf(host->name, DRV_NAME "%d", carm_host_id);
- rc = register_blkdev(host->major, host->name);
- if (rc < 0)
- goto err_out_free_majors;
- if (host->flags & FL_DYN_MAJOR)
- host->major = rc;
- devfs_mk_dir(DRV_NAME);
- rc = carm_init_disks(host);
- if (rc)
- goto err_out_blkdev_disks;
- pci_set_master(pdev);
- rc = request_irq(pdev->irq, carm_interrupt, SA_SHIRQ, DRV_NAME, host);
- if (rc) {
- printk(KERN_ERR DRV_NAME "(%s): irq alloc failuren",
- pci_name(pdev));
- goto err_out_blkdev_disks;
- }
- rc = carm_init_host(host);
- if (rc)
- goto err_out_free_irq;
- DPRINTK("waiting for probe_semn");
- down(&host->probe_sem);
- printk(KERN_INFO "%s: pci %s, ports %d, io %lx, irq %u, major %dn",
- host->name, pci_name(pdev), (int) CARM_MAX_PORTS,
- pci_resource_start(pdev, 0), pdev->irq, host->major);
- carm_host_id++;
- pci_set_drvdata(pdev, host);
- return 0;
- err_out_free_irq:
- free_irq(pdev->irq, host);
- err_out_blkdev_disks:
- carm_free_disks(host);
- unregister_blkdev(host->major, host->name);
- err_out_free_majors:
- if (host->major == 160)
- clear_bit(0, &carm_major_alloc);
- else if (host->major == 161)
- clear_bit(1, &carm_major_alloc);
- blk_cleanup_queue(host->oob_q);
- err_out_pci_free:
- pci_free_consistent(pdev, CARM_SHM_SIZE, host->shm, host->shm_dma);
- err_out_iounmap:
- iounmap(host->mmio);
- err_out_kfree:
- kfree(host);
- err_out_regions:
- pci_release_regions(pdev);
- err_out:
- pci_disable_device(pdev);
- return rc;
- }
- static void carm_remove_one (struct pci_dev *pdev)
- {
- struct carm_host *host = pci_get_drvdata(pdev);
- if (!host) {
- printk(KERN_ERR PFX "BUG: no host data for PCI(%s)n",
- pci_name(pdev));
- return;
- }
- free_irq(pdev->irq, host);
- carm_free_disks(host);
- devfs_remove(DRV_NAME);
- unregister_blkdev(host->major, host->name);
- if (host->major == 160)
- clear_bit(0, &carm_major_alloc);
- else if (host->major == 161)
- clear_bit(1, &carm_major_alloc);
- blk_cleanup_queue(host->oob_q);
- pci_free_consistent(pdev, CARM_SHM_SIZE, host->shm, host->shm_dma);
- iounmap(host->mmio);
- kfree(host);
- pci_release_regions(pdev);
- pci_disable_device(pdev);
- pci_set_drvdata(pdev, NULL);
- }
- static int __init carm_init(void)
- {
- return pci_module_init(&carm_driver);
- }
- static void __exit carm_exit(void)
- {
- pci_unregister_driver(&carm_driver);
- }
- module_init(carm_init);
- module_exit(carm_exit);