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![Harvey Harrison](/assets/img/avatar_default.png)
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
1765 lines
40 KiB
C
1765 lines
40 KiB
C
/*
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* sx8.c: Driver for Promise SATA SX8 looks-like-I2O hardware
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*
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* Copyright 2004-2005 Red Hat, Inc.
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*
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* Author/maintainer: Jeff Garzik <jgarzik@pobox.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/blkdev.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/compiler.h>
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#include <linux/workqueue.h>
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <linux/time.h>
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#include <linux/hdreg.h>
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#include <linux/dma-mapping.h>
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#include <linux/completion.h>
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#include <linux/scatterlist.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#if 0
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#define CARM_DEBUG
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#define CARM_VERBOSE_DEBUG
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#else
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#undef CARM_DEBUG
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#undef CARM_VERBOSE_DEBUG
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#endif
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#undef CARM_NDEBUG
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#define DRV_NAME "sx8"
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#define DRV_VERSION "1.0"
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#define PFX DRV_NAME ": "
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MODULE_AUTHOR("Jeff Garzik");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Promise SATA SX8 block driver");
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MODULE_VERSION(DRV_VERSION);
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/*
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* SX8 hardware has a single message queue for all ATA ports.
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* When this driver was written, the hardware (firmware?) would
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* corrupt data eventually, if more than one request was outstanding.
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* As one can imagine, having 8 ports bottlenecking on a single
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* command hurts performance.
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*
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* Based on user reports, later versions of the hardware (firmware?)
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* seem to be able to survive with more than one command queued.
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*
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* Therefore, we default to the safe option -- 1 command -- but
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* allow the user to increase this.
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*
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* SX8 should be able to support up to ~60 queued commands (CARM_MAX_REQ),
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* but problems seem to occur when you exceed ~30, even on newer hardware.
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*/
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static int max_queue = 1;
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module_param(max_queue, int, 0444);
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MODULE_PARM_DESC(max_queue, "Maximum number of queued commands. (min==1, max==30, safe==1)");
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#define NEXT_RESP(idx) ((idx + 1) % RMSG_Q_LEN)
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/* 0xf is just arbitrary, non-zero noise; this is sorta like poisoning */
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#define TAG_ENCODE(tag) (((tag) << 16) | 0xf)
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#define TAG_DECODE(tag) (((tag) >> 16) & 0x1f)
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#define TAG_VALID(tag) ((((tag) & 0xf) == 0xf) && (TAG_DECODE(tag) < 32))
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/* note: prints function name for you */
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#ifdef CARM_DEBUG
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#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
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#ifdef CARM_VERBOSE_DEBUG
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#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
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#else
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#define VPRINTK(fmt, args...)
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#endif /* CARM_VERBOSE_DEBUG */
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#else
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#define DPRINTK(fmt, args...)
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#define VPRINTK(fmt, args...)
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#endif /* CARM_DEBUG */
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#ifdef CARM_NDEBUG
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#define assert(expr)
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#else
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#define assert(expr) \
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if(unlikely(!(expr))) { \
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printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
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#expr, __FILE__, __func__, __LINE__); \
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}
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#endif
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/* defines only for the constants which don't work well as enums */
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struct carm_host;
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enum {
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/* adapter-wide limits */
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CARM_MAX_PORTS = 8,
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CARM_SHM_SIZE = (4096 << 7),
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CARM_MINORS_PER_MAJOR = 256 / CARM_MAX_PORTS,
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CARM_MAX_WAIT_Q = CARM_MAX_PORTS + 1,
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/* command message queue limits */
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CARM_MAX_REQ = 64, /* max command msgs per host */
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CARM_MSG_LOW_WATER = (CARM_MAX_REQ / 4), /* refill mark */
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/* S/G limits, host-wide and per-request */
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CARM_MAX_REQ_SG = 32, /* max s/g entries per request */
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CARM_MAX_HOST_SG = 600, /* max s/g entries per host */
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CARM_SG_LOW_WATER = (CARM_MAX_HOST_SG / 4), /* re-fill mark */
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/* hardware registers */
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CARM_IHQP = 0x1c,
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CARM_INT_STAT = 0x10, /* interrupt status */
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CARM_INT_MASK = 0x14, /* interrupt mask */
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CARM_HMUC = 0x18, /* host message unit control */
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RBUF_ADDR_LO = 0x20, /* response msg DMA buf low 32 bits */
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RBUF_ADDR_HI = 0x24, /* response msg DMA buf high 32 bits */
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RBUF_BYTE_SZ = 0x28,
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CARM_RESP_IDX = 0x2c,
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CARM_CMS0 = 0x30, /* command message size reg 0 */
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CARM_LMUC = 0x48,
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CARM_HMPHA = 0x6c,
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CARM_INITC = 0xb5,
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/* bits in CARM_INT_{STAT,MASK} */
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INT_RESERVED = 0xfffffff0,
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INT_WATCHDOG = (1 << 3), /* watchdog timer */
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INT_Q_OVERFLOW = (1 << 2), /* cmd msg q overflow */
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INT_Q_AVAILABLE = (1 << 1), /* cmd msg q has free space */
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INT_RESPONSE = (1 << 0), /* response msg available */
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INT_ACK_MASK = INT_WATCHDOG | INT_Q_OVERFLOW,
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INT_DEF_MASK = INT_RESERVED | INT_Q_OVERFLOW |
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INT_RESPONSE,
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/* command messages, and related register bits */
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CARM_HAVE_RESP = 0x01,
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CARM_MSG_READ = 1,
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CARM_MSG_WRITE = 2,
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CARM_MSG_VERIFY = 3,
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CARM_MSG_GET_CAPACITY = 4,
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CARM_MSG_FLUSH = 5,
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CARM_MSG_IOCTL = 6,
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CARM_MSG_ARRAY = 8,
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CARM_MSG_MISC = 9,
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CARM_CME = (1 << 2),
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CARM_RME = (1 << 1),
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CARM_WZBC = (1 << 0),
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CARM_RMI = (1 << 0),
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CARM_Q_FULL = (1 << 3),
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CARM_MSG_SIZE = 288,
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CARM_Q_LEN = 48,
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/* CARM_MSG_IOCTL messages */
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CARM_IOC_SCAN_CHAN = 5, /* scan channels for devices */
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CARM_IOC_GET_TCQ = 13, /* get tcq/ncq depth */
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CARM_IOC_SET_TCQ = 14, /* set tcq/ncq depth */
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IOC_SCAN_CHAN_NODEV = 0x1f,
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IOC_SCAN_CHAN_OFFSET = 0x40,
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/* CARM_MSG_ARRAY messages */
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CARM_ARRAY_INFO = 0,
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ARRAY_NO_EXIST = (1 << 31),
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/* response messages */
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RMSG_SZ = 8, /* sizeof(struct carm_response) */
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RMSG_Q_LEN = 48, /* resp. msg list length */
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RMSG_OK = 1, /* bit indicating msg was successful */
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/* length of entire resp. msg buffer */
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RBUF_LEN = RMSG_SZ * RMSG_Q_LEN,
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PDC_SHM_SIZE = (4096 << 7), /* length of entire h/w buffer */
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/* CARM_MSG_MISC messages */
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MISC_GET_FW_VER = 2,
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MISC_ALLOC_MEM = 3,
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MISC_SET_TIME = 5,
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/* MISC_GET_FW_VER feature bits */
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FW_VER_4PORT = (1 << 2), /* 1=4 ports, 0=8 ports */
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FW_VER_NON_RAID = (1 << 1), /* 1=non-RAID firmware, 0=RAID */
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FW_VER_ZCR = (1 << 0), /* zero channel RAID (whatever that is) */
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/* carm_host flags */
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FL_NON_RAID = FW_VER_NON_RAID,
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FL_4PORT = FW_VER_4PORT,
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FL_FW_VER_MASK = (FW_VER_NON_RAID | FW_VER_4PORT),
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FL_DAC = (1 << 16),
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FL_DYN_MAJOR = (1 << 17),
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};
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enum {
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CARM_SG_BOUNDARY = 0xffffUL, /* s/g segment boundary */
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};
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enum scatter_gather_types {
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SGT_32BIT = 0,
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SGT_64BIT = 1,
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};
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enum host_states {
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HST_INVALID, /* invalid state; never used */
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HST_ALLOC_BUF, /* setting up master SHM area */
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HST_ERROR, /* we never leave here */
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HST_PORT_SCAN, /* start dev scan */
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HST_DEV_SCAN_START, /* start per-device probe */
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HST_DEV_SCAN, /* continue per-device probe */
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HST_DEV_ACTIVATE, /* activate devices we found */
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HST_PROBE_FINISHED, /* probe is complete */
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HST_PROBE_START, /* initiate probe */
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HST_SYNC_TIME, /* tell firmware what time it is */
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HST_GET_FW_VER, /* get firmware version, adapter port cnt */
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};
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#ifdef CARM_DEBUG
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static const char *state_name[] = {
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"HST_INVALID",
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"HST_ALLOC_BUF",
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"HST_ERROR",
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"HST_PORT_SCAN",
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"HST_DEV_SCAN_START",
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"HST_DEV_SCAN",
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"HST_DEV_ACTIVATE",
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"HST_PROBE_FINISHED",
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"HST_PROBE_START",
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"HST_SYNC_TIME",
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"HST_GET_FW_VER",
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};
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#endif
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struct carm_port {
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unsigned int port_no;
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struct gendisk *disk;
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struct carm_host *host;
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/* attached device characteristics */
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u64 capacity;
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char name[41];
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u16 dev_geom_head;
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u16 dev_geom_sect;
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u16 dev_geom_cyl;
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};
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struct carm_request {
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unsigned int tag;
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int n_elem;
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unsigned int msg_type;
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unsigned int msg_subtype;
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unsigned int msg_bucket;
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struct request *rq;
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struct carm_port *port;
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struct scatterlist sg[CARM_MAX_REQ_SG];
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};
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struct carm_host {
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unsigned long flags;
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void __iomem *mmio;
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void *shm;
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dma_addr_t shm_dma;
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int major;
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int id;
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char name[32];
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spinlock_t lock;
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struct pci_dev *pdev;
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unsigned int state;
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u32 fw_ver;
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struct request_queue *oob_q;
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unsigned int n_oob;
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unsigned int hw_sg_used;
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unsigned int resp_idx;
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unsigned int wait_q_prod;
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unsigned int wait_q_cons;
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struct request_queue *wait_q[CARM_MAX_WAIT_Q];
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unsigned int n_msgs;
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u64 msg_alloc;
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struct carm_request req[CARM_MAX_REQ];
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void *msg_base;
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dma_addr_t msg_dma;
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int cur_scan_dev;
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unsigned long dev_active;
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unsigned long dev_present;
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struct carm_port port[CARM_MAX_PORTS];
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struct work_struct fsm_task;
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struct completion probe_comp;
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};
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struct carm_response {
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__le32 ret_handle;
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__le32 status;
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} __attribute__((packed));
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struct carm_msg_sg {
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__le32 start;
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__le32 len;
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} __attribute__((packed));
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struct carm_msg_rw {
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u8 type;
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u8 id;
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u8 sg_count;
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u8 sg_type;
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__le32 handle;
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__le32 lba;
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__le16 lba_count;
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__le16 lba_high;
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struct carm_msg_sg sg[32];
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} __attribute__((packed));
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struct carm_msg_allocbuf {
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u8 type;
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u8 subtype;
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u8 n_sg;
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u8 sg_type;
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__le32 handle;
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__le32 addr;
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__le32 len;
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__le32 evt_pool;
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__le32 n_evt;
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__le32 rbuf_pool;
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__le32 n_rbuf;
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__le32 msg_pool;
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__le32 n_msg;
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struct carm_msg_sg sg[8];
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} __attribute__((packed));
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struct carm_msg_ioctl {
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u8 type;
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u8 subtype;
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u8 array_id;
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u8 reserved1;
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__le32 handle;
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__le32 data_addr;
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u32 reserved2;
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} __attribute__((packed));
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struct carm_msg_sync_time {
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u8 type;
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u8 subtype;
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u16 reserved1;
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__le32 handle;
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u32 reserved2;
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__le32 timestamp;
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} __attribute__((packed));
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struct carm_msg_get_fw_ver {
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u8 type;
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u8 subtype;
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u16 reserved1;
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__le32 handle;
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__le32 data_addr;
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u32 reserved2;
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} __attribute__((packed));
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struct carm_fw_ver {
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__le32 version;
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u8 features;
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u8 reserved1;
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u16 reserved2;
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} __attribute__((packed));
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struct carm_array_info {
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__le32 size;
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__le16 size_hi;
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__le16 stripe_size;
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__le32 mode;
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__le16 stripe_blk_sz;
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__le16 reserved1;
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__le16 cyl;
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__le16 head;
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__le16 sect;
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u8 array_id;
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u8 reserved2;
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char name[40];
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__le32 array_status;
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/* device list continues beyond this point? */
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} __attribute__((packed));
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static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
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static void carm_remove_one (struct pci_dev *pdev);
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static int carm_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo);
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static struct pci_device_id carm_pci_tbl[] = {
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{ PCI_VENDOR_ID_PROMISE, 0x8000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
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{ PCI_VENDOR_ID_PROMISE, 0x8002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
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{ } /* terminate list */
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};
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MODULE_DEVICE_TABLE(pci, carm_pci_tbl);
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static struct pci_driver carm_driver = {
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.name = DRV_NAME,
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.id_table = carm_pci_tbl,
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.probe = carm_init_one,
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.remove = carm_remove_one,
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};
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static struct block_device_operations carm_bd_ops = {
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.owner = THIS_MODULE,
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.getgeo = carm_bdev_getgeo,
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};
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static unsigned int carm_host_id;
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static unsigned long carm_major_alloc;
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static int carm_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo)
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{
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struct carm_port *port = bdev->bd_disk->private_data;
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geo->heads = (u8) port->dev_geom_head;
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geo->sectors = (u8) port->dev_geom_sect;
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geo->cylinders = port->dev_geom_cyl;
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return 0;
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}
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static const u32 msg_sizes[] = { 32, 64, 128, CARM_MSG_SIZE };
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static inline int carm_lookup_bucket(u32 msg_size)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(msg_sizes); i++)
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if (msg_size <= msg_sizes[i])
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return i;
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return -ENOENT;
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}
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static void carm_init_buckets(void __iomem *mmio)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(msg_sizes); i++)
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writel(msg_sizes[i], mmio + CARM_CMS0 + (4 * i));
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}
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static inline void *carm_ref_msg(struct carm_host *host,
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unsigned int msg_idx)
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{
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return host->msg_base + (msg_idx * CARM_MSG_SIZE);
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}
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static inline dma_addr_t carm_ref_msg_dma(struct carm_host *host,
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unsigned int msg_idx)
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{
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return host->msg_dma + (msg_idx * CARM_MSG_SIZE);
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}
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static int carm_send_msg(struct carm_host *host,
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struct carm_request *crq)
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{
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void __iomem *mmio = host->mmio;
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u32 msg = (u32) carm_ref_msg_dma(host, crq->tag);
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u32 cm_bucket = crq->msg_bucket;
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u32 tmp;
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int rc = 0;
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VPRINTK("ENTER\n");
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tmp = readl(mmio + CARM_HMUC);
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if (tmp & CARM_Q_FULL) {
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#if 0
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tmp = readl(mmio + CARM_INT_MASK);
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tmp |= INT_Q_AVAILABLE;
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writel(tmp, mmio + CARM_INT_MASK);
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readl(mmio + CARM_INT_MASK); /* flush */
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#endif
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DPRINTK("host msg queue full\n");
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rc = -EBUSY;
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} 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 < max_queue; 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);
|
|
sg_init_table(crq->sg, CARM_MAX_REQ_SG);
|
|
return crq;
|
|
}
|
|
|
|
DPRINTK("no request available, returning NULL\n");
|
|
return NULL;
|
|
}
|
|
|
|
static int carm_put_request(struct carm_host *host, struct carm_request *crq)
|
|
{
|
|
assert(crq->tag < max_queue);
|
|
|
|
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 == %u\n", 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 == %u\n", 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 error)
|
|
{
|
|
struct request *req = crq->rq;
|
|
int rc;
|
|
|
|
rc = __blk_end_request(req, error, blk_rq_bytes(req));
|
|
assert(rc == 0);
|
|
|
|
rc = carm_put_request(host, crq);
|
|
assert(rc == 0);
|
|
}
|
|
|
|
static inline void carm_push_q (struct carm_host *host, struct request_queue *q)
|
|
{
|
|
unsigned int idx = host->wait_q_prod % CARM_MAX_WAIT_Q;
|
|
|
|
blk_stop_queue(q);
|
|
VPRINTK("STOPPED QUEUE %p\n", q);
|
|
|
|
host->wait_q[idx] = q;
|
|
host->wait_q_prod++;
|
|
BUG_ON(host->wait_q_prod == host->wait_q_cons); /* overrun */
|
|
}
|
|
|
|
static inline struct request_queue *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)
|
|
{
|
|
struct request_queue *q = carm_pop_q(host);
|
|
if (q) {
|
|
blk_start_queue(q);
|
|
VPRINTK("STARTED QUEUE %p\n", q);
|
|
}
|
|
}
|
|
|
|
static inline void carm_end_rq(struct carm_host *host, struct carm_request *crq,
|
|
int error)
|
|
{
|
|
carm_end_request_queued(host, crq, error);
|
|
if (max_queue == 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(struct request_queue *q)
|
|
{
|
|
struct carm_host *host = q->queuedata;
|
|
struct carm_request *crq;
|
|
struct request *rq;
|
|
int rc;
|
|
|
|
while (1) {
|
|
DPRINTK("get req\n");
|
|
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 req\n");
|
|
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(struct request_queue *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 req\n");
|
|
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, -EIO);
|
|
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, -EIO);
|
|
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 msg\n");
|
|
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 == %u\n", 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 error)
|
|
{
|
|
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("ENTER\n");
|
|
|
|
carm_end_rq(host, crq, error);
|
|
|
|
if (error)
|
|
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==%d\n",
|
|
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 sectors\n",
|
|
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 error)
|
|
{
|
|
u8 *msg_data = mem + IOC_SCAN_CHAN_OFFSET;
|
|
unsigned int i, dev_count = 0;
|
|
int new_state = HST_DEV_SCAN_START;
|
|
|
|
DPRINTK("ENTER\n");
|
|
|
|
carm_end_rq(host, crq, error);
|
|
|
|
if (error) {
|
|
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 devices\n",
|
|
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 error,
|
|
int cur_state, int next_state)
|
|
{
|
|
DPRINTK("ENTER\n");
|
|
|
|
carm_end_rq(host, crq, error);
|
|
|
|
assert(host->state == cur_state);
|
|
if (error)
|
|
host->state = HST_ERROR;
|
|
else
|
|
host->state = next_state;
|
|
schedule_work(&host->fsm_task);
|
|
}
|
|
|
|
static inline void carm_handle_rw(struct carm_host *host,
|
|
struct carm_request *crq, int error)
|
|
{
|
|
int pci_dir;
|
|
|
|
VPRINTK("ENTER\n");
|
|
|
|
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, error);
|
|
}
|
|
|
|
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 error = (status == RMSG_OK) ? 0 : -EIO;
|
|
u8 *mem;
|
|
|
|
VPRINTK("ENTER, handle == 0x%x\n", handle);
|
|
|
|
if (unlikely(!TAG_VALID(handle))) {
|
|
printk(KERN_ERR DRV_NAME "(%s): BUG: invalid tag 0x%x\n",
|
|
pci_name(host->pdev), handle);
|
|
return;
|
|
}
|
|
|
|
msg_idx = TAG_DECODE(handle);
|
|
VPRINTK("tag == %u\n", 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, error);
|
|
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, error);
|
|
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, error,
|
|
HST_ALLOC_BUF, HST_SYNC_TIME);
|
|
break;
|
|
case MISC_SET_TIME:
|
|
carm_handle_generic(host, crq, error,
|
|
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 (!error) {
|
|
host->fw_ver = le32_to_cpu(ver->version);
|
|
host->flags |= (ver->features & FL_FW_VER_MASK);
|
|
}
|
|
carm_handle_generic(host, crq, error,
|
|
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, error);
|
|
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/%d\n",
|
|
pci_name(host->pdev), crq->msg_type, crq->msg_subtype);
|
|
carm_end_rq(host, crq, -EIO);
|
|
}
|
|
|
|
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 %u\n", 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 %u\n", 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 %d\n",
|
|
pci_name(host->pdev), (int) evt_type);
|
|
resp[idx].status = cpu_to_le32(0xffffffff);
|
|
}
|
|
|
|
idx = NEXT_RESP(idx);
|
|
work++;
|
|
}
|
|
|
|
VPRINTK("EXIT, work==%u\n", work);
|
|
host->resp_idx += work;
|
|
}
|
|
|
|
static irqreturn_t carm_interrupt(int irq, void *__host)
|
|
{
|
|
struct carm_host *host = __host;
|
|
void __iomem *mmio;
|
|
u32 mask;
|
|
int handled = 0;
|
|
unsigned long flags;
|
|
|
|
if (!host) {
|
|
VPRINTK("no host\n");
|
|
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%x\n", 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%x\n", mask);
|
|
goto out;
|
|
}
|
|
|
|
if (mask & CARM_HAVE_RESP) {
|
|
handled = 1;
|
|
carm_handle_responses(host);
|
|
}
|
|
|
|
out:
|
|
spin_unlock_irqrestore(&host->lock, flags);
|
|
VPRINTK("EXIT\n");
|
|
return IRQ_RETVAL(handled);
|
|
}
|
|
|
|
static void carm_fsm_task (struct work_struct *work)
|
|
{
|
|
struct carm_host *host =
|
|
container_of(work, struct carm_host, fsm_task);
|
|
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 == %s\n", 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 activated\n",
|
|
pci_name(host->pdev), activated);
|
|
|
|
new_state = HST_PROBE_FINISHED;
|
|
reschedule = 1;
|
|
break;
|
|
}
|
|
|
|
case HST_PROBE_FINISHED:
|
|
complete(&host->probe_comp);
|
|
break;
|
|
|
|
case HST_ERROR:
|
|
/* FIXME: TODO */
|
|
break;
|
|
|
|
default:
|
|
/* should never occur */
|
|
printk(KERN_ERR PFX "BUG: unknown state %d\n", 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 == %s\n",
|
|
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("ENTER\n");
|
|
|
|
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, waiting\n");
|
|
rc = carm_init_wait(mmio, CARM_CME, 1);
|
|
if (rc) {
|
|
DPRINTK("EXIT, carm_init_wait 1 failed\n");
|
|
return rc;
|
|
}
|
|
}
|
|
if (tmp & CARM_RME) {
|
|
DPRINTK("RME bit present, waiting\n");
|
|
rc = carm_init_wait(mmio, CARM_RME, 1);
|
|
if (rc) {
|
|
DPRINTK("EXIT, carm_init_wait 2 failed\n");
|
|
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 failed\n");
|
|
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 failed\n");
|
|
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("EXIT\n");
|
|
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;
|
|
struct request_queue *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);
|
|
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) {
|
|
struct request_queue *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;
|
|
struct request_queue *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 failure\n",
|
|
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 failure\n",
|
|
pci_name(pdev));
|
|
goto err_out_regions;
|
|
}
|
|
pci_dac = 0;
|
|
#ifdef IF_64BIT_DMA_IS_POSSIBLE /* grrrr... */
|
|
}
|
|
#endif
|
|
|
|
host = kzalloc(sizeof(*host), GFP_KERNEL);
|
|
if (!host) {
|
|
printk(KERN_ERR DRV_NAME "(%s): memory alloc failure\n",
|
|
pci_name(pdev));
|
|
rc = -ENOMEM;
|
|
goto err_out_regions;
|
|
}
|
|
|
|
host->pdev = pdev;
|
|
host->flags = pci_dac ? FL_DAC : 0;
|
|
spin_lock_init(&host->lock);
|
|
INIT_WORK(&host->fsm_task, carm_fsm_task);
|
|
init_completion(&host->probe_comp);
|
|
|
|
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 failure\n",
|
|
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 failure\n",
|
|
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 failure\n",
|
|
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;
|
|
|
|
rc = carm_init_disks(host);
|
|
if (rc)
|
|
goto err_out_blkdev_disks;
|
|
|
|
pci_set_master(pdev);
|
|
|
|
rc = request_irq(pdev->irq, carm_interrupt, IRQF_SHARED, DRV_NAME, host);
|
|
if (rc) {
|
|
printk(KERN_ERR DRV_NAME "(%s): irq alloc failure\n",
|
|
pci_name(pdev));
|
|
goto err_out_blkdev_disks;
|
|
}
|
|
|
|
rc = carm_init_host(host);
|
|
if (rc)
|
|
goto err_out_free_irq;
|
|
|
|
DPRINTK("waiting for probe_comp\n");
|
|
wait_for_completion(&host->probe_comp);
|
|
|
|
printk(KERN_INFO "%s: pci %s, ports %d, io %llx, irq %u, major %d\n",
|
|
host->name, pci_name(pdev), (int) CARM_MAX_PORTS,
|
|
(unsigned long long)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);
|
|
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_register_driver(&carm_driver);
|
|
}
|
|
|
|
static void __exit carm_exit(void)
|
|
{
|
|
pci_unregister_driver(&carm_driver);
|
|
}
|
|
|
|
module_init(carm_init);
|
|
module_exit(carm_exit);
|
|
|
|
|