diff options
Diffstat (limited to 'drivers/s390/char')
| -rw-r--r-- | drivers/s390/char/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/s390/char/monwriter.c | 6 | ||||
| -rw-r--r-- | drivers/s390/char/raw3270.c | 6 | ||||
| -rw-r--r-- | drivers/s390/char/sclp_vt220.c | 62 | ||||
| -rw-r--r-- | drivers/s390/char/vmur.c | 178 | ||||
| -rw-r--r-- | drivers/s390/char/vmur.h | 5 |
6 files changed, 164 insertions, 105 deletions
diff --git a/drivers/s390/char/Kconfig b/drivers/s390/char/Kconfig index 3f36cb3910ee..643033890e34 100644 --- a/drivers/s390/char/Kconfig +++ b/drivers/s390/char/Kconfig @@ -44,15 +44,9 @@ config CCW_CONSOLE depends on TN3215_CONSOLE || TN3270_CONSOLE default y -config SCLP - bool "Support for SCLP" - depends on S390 - help - Include support for the SCLP interface to the service element. - config SCLP_TTY bool "Support for SCLP line mode terminal" - depends on SCLP + depends on S390 help Include support for IBM SCLP line-mode terminals. @@ -65,7 +59,7 @@ config SCLP_CONSOLE config SCLP_VT220_TTY bool "Support for SCLP VT220-compatible terminal" - depends on SCLP + depends on S390 help Include support for an IBM SCLP VT220-compatible terminal. @@ -78,7 +72,7 @@ config SCLP_VT220_CONSOLE config SCLP_CPI tristate "Control-Program Identification" - depends on SCLP + depends on S390 help This option enables the hardware console interface for system identification. This is commonly used for workload management and diff --git a/drivers/s390/char/monwriter.c b/drivers/s390/char/monwriter.c index 268598ef3efe..20442fbf9346 100644 --- a/drivers/s390/char/monwriter.c +++ b/drivers/s390/char/monwriter.c @@ -17,6 +17,7 @@ #include <linux/miscdevice.h> #include <linux/ctype.h> #include <linux/poll.h> +#include <linux/mutex.h> #include <asm/uaccess.h> #include <asm/ebcdic.h> #include <asm/io.h> @@ -41,6 +42,7 @@ struct mon_private { size_t hdr_to_read; size_t data_to_read; struct mon_buf *current_buf; + struct mutex thread_mutex; }; /* @@ -179,6 +181,7 @@ static int monwrite_open(struct inode *inode, struct file *filp) return -ENOMEM; INIT_LIST_HEAD(&monpriv->list); monpriv->hdr_to_read = sizeof(monpriv->hdr); + mutex_init(&monpriv->thread_mutex); filp->private_data = monpriv; return nonseekable_open(inode, filp); } @@ -209,6 +212,7 @@ static ssize_t monwrite_write(struct file *filp, const char __user *data, void *to; int rc; + mutex_lock(&monpriv->thread_mutex); for (written = 0; written < count; ) { if (monpriv->hdr_to_read) { len = min(count - written, monpriv->hdr_to_read); @@ -247,11 +251,13 @@ static ssize_t monwrite_write(struct file *filp, const char __user *data, } monpriv->hdr_to_read = sizeof(monpriv->hdr); } + mutex_unlock(&monpriv->thread_mutex); return written; out_error: monpriv->data_to_read = 0; monpriv->hdr_to_read = sizeof(struct monwrite_hdr); + mutex_unlock(&monpriv->thread_mutex); return rc; } diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c index 743944ad61ec..4f2f81b16cfa 100644 --- a/drivers/s390/char/raw3270.c +++ b/drivers/s390/char/raw3270.c @@ -147,8 +147,7 @@ raw3270_request_alloc(size_t size) * Allocate a new 3270 ccw request from bootmem. Only works very * early in the boot process. Only con3270.c should be using this. */ -struct raw3270_request * -raw3270_request_alloc_bootmem(size_t size) +struct raw3270_request __init *raw3270_request_alloc_bootmem(size_t size) { struct raw3270_request *rq; @@ -848,8 +847,7 @@ raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc) /* * Setup 3270 device configured as console. */ -struct raw3270 * -raw3270_setup_console(struct ccw_device *cdev) +struct raw3270 __init *raw3270_setup_console(struct ccw_device *cdev) { struct raw3270 *rp; char *ascebc; diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c index 726334757bbf..40cd21bc5cc4 100644 --- a/drivers/s390/char/sclp_vt220.c +++ b/drivers/s390/char/sclp_vt220.c @@ -621,11 +621,24 @@ sclp_vt220_flush_buffer(struct tty_struct *tty) /* * Initialize all relevant components and register driver with system. */ -static int -__sclp_vt220_init(int early) +static void __init __sclp_vt220_cleanup(void) +{ + struct list_head *page, *p; + + list_for_each_safe(page, p, &sclp_vt220_empty) { + list_del(page); + if (slab_is_available()) + free_page((unsigned long) page); + else + free_bootmem((unsigned long) page, PAGE_SIZE); + } +} + +static int __init __sclp_vt220_init(void) { void *page; int i; + int num_pages; if (sclp_vt220_initialized) return 0; @@ -642,13 +655,16 @@ __sclp_vt220_init(int early) sclp_vt220_flush_later = 0; /* Allocate pages for output buffering */ - for (i = 0; i < (early ? MAX_CONSOLE_PAGES : MAX_KMEM_PAGES); i++) { - if (early) - page = alloc_bootmem_low_pages(PAGE_SIZE); - else + num_pages = slab_is_available() ? MAX_KMEM_PAGES : MAX_CONSOLE_PAGES; + for (i = 0; i < num_pages; i++) { + if (slab_is_available()) page = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); - if (!page) + else + page = alloc_bootmem_low_pages(PAGE_SIZE); + if (!page) { + __sclp_vt220_cleanup(); return -ENOMEM; + } list_add_tail((struct list_head *) page, &sclp_vt220_empty); } return 0; @@ -662,14 +678,13 @@ static const struct tty_operations sclp_vt220_ops = { .flush_chars = sclp_vt220_flush_chars, .write_room = sclp_vt220_write_room, .chars_in_buffer = sclp_vt220_chars_in_buffer, - .flush_buffer = sclp_vt220_flush_buffer + .flush_buffer = sclp_vt220_flush_buffer, }; /* * Register driver with SCLP and Linux and initialize internal tty structures. */ -static int __init -sclp_vt220_tty_init(void) +static int __init sclp_vt220_tty_init(void) { struct tty_driver *driver; int rc; @@ -679,18 +694,15 @@ sclp_vt220_tty_init(void) driver = alloc_tty_driver(1); if (!driver) return -ENOMEM; - rc = __sclp_vt220_init(0); - if (rc) { - put_tty_driver(driver); - return rc; - } + rc = __sclp_vt220_init(); + if (rc) + goto out_driver; rc = sclp_register(&sclp_vt220_register); if (rc) { printk(KERN_ERR SCLP_VT220_PRINT_HEADER "could not register tty - " "sclp_register returned %d\n", rc); - put_tty_driver(driver); - return rc; + goto out_init; } driver->owner = THIS_MODULE; @@ -709,14 +721,20 @@ sclp_vt220_tty_init(void) printk(KERN_ERR SCLP_VT220_PRINT_HEADER "could not register tty - " "tty_register_driver returned %d\n", rc); - put_tty_driver(driver); - return rc; + goto out_sclp; } sclp_vt220_driver = driver; return 0; -} -module_init(sclp_vt220_tty_init); +out_sclp: + sclp_unregister(&sclp_vt220_register); +out_init: + __sclp_vt220_cleanup(); +out_driver: + put_tty_driver(driver); + return rc; +} +__initcall(sclp_vt220_tty_init); #ifdef CONFIG_SCLP_VT220_CONSOLE @@ -762,7 +780,7 @@ sclp_vt220_con_init(void) if (!CONSOLE_IS_SCLP) return 0; - rc = __sclp_vt220_init(1); + rc = __sclp_vt220_init(); if (rc) return rc; /* Attach linux console */ diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c index e90b0f846195..04b19bdc09da 100644 --- a/drivers/s390/char/vmur.c +++ b/drivers/s390/char/vmur.c @@ -119,10 +119,12 @@ static void urdev_put(struct urdev *urd) /* * Low-level functions to do I/O to a ur device. * alloc_chan_prog + * free_chan_prog * do_ur_io * ur_int_handler * * alloc_chan_prog allocates and builds the channel program + * free_chan_prog frees memory of the channel program * * do_ur_io issues the channel program to the device and blocks waiting * on a completion event it publishes at urd->io_done. The function @@ -137,6 +139,16 @@ static void urdev_put(struct urdev *urd) * address pointer that alloc_chan_prog returned. */ +static void free_chan_prog(struct ccw1 *cpa) +{ + struct ccw1 *ptr = cpa; + + while (ptr->cda) { + kfree((void *)(addr_t) ptr->cda); + ptr++; + } + kfree(cpa); +} /* * alloc_chan_prog @@ -144,44 +156,45 @@ static void urdev_put(struct urdev *urd) * with a final NOP CCW command-chained on (which ensures that CE and DE * are presented together in a single interrupt instead of as separate * interrupts unless an incorrect length indication kicks in first). The - * data length in each CCW is reclen. The caller must ensure that count - * is an integral multiple of reclen. - * The channel program pointer returned by this function must be freed - * with kfree. The caller is responsible for checking that - * count/reclen is not ridiculously large. + * data length in each CCW is reclen. */ -static struct ccw1 *alloc_chan_prog(char *buf, size_t count, size_t reclen) +static struct ccw1 *alloc_chan_prog(const char __user *ubuf, int rec_count, + int reclen) { - size_t num_ccws; struct ccw1 *cpa; + void *kbuf; int i; - TRACE("alloc_chan_prog(%p, %zu, %zu)\n", buf, count, reclen); + TRACE("alloc_chan_prog(%p, %i, %i)\n", ubuf, rec_count, reclen); /* * We chain a NOP onto the writes to force CE+DE together. * That means we allocate room for CCWs to cover count/reclen * records plus a NOP. */ - num_ccws = count / reclen + 1; - cpa = kmalloc(num_ccws * sizeof(struct ccw1), GFP_KERNEL | GFP_DMA); + cpa = kzalloc((rec_count + 1) * sizeof(struct ccw1), + GFP_KERNEL | GFP_DMA); if (!cpa) - return NULL; + return ERR_PTR(-ENOMEM); - for (i = 0; count; i++) { + for (i = 0; i < rec_count; i++) { cpa[i].cmd_code = WRITE_CCW_CMD; cpa[i].flags = CCW_FLAG_CC | CCW_FLAG_SLI; cpa[i].count = reclen; - cpa[i].cda = __pa(buf); - buf += reclen; - count -= reclen; + kbuf = kmalloc(reclen, GFP_KERNEL | GFP_DMA); + if (!kbuf) { + free_chan_prog(cpa); + return ERR_PTR(-ENOMEM); + } + cpa[i].cda = (u32)(addr_t) kbuf; + if (copy_from_user(kbuf, ubuf, reclen)) { + free_chan_prog(cpa); + return ERR_PTR(-EFAULT); + } + ubuf += reclen; } /* The following NOP CCW forces CE+DE to be presented together */ cpa[i].cmd_code = CCW_CMD_NOOP; - cpa[i].flags = 0; - cpa[i].count = 0; - cpa[i].cda = 0; - return cpa; } @@ -189,7 +202,7 @@ static int do_ur_io(struct urdev *urd, struct ccw1 *cpa) { int rc; struct ccw_device *cdev = urd->cdev; - DECLARE_COMPLETION(event); + DECLARE_COMPLETION_ONSTACK(event); TRACE("do_ur_io: cpa=%p\n", cpa); @@ -325,24 +338,11 @@ static ssize_t do_write(struct urdev *urd, const char __user *udata, size_t count, size_t reclen, loff_t *ppos) { struct ccw1 *cpa; - char *buf; int rc; - /* Data buffer must be under 2GB line for fmt1 CCWs: hence GFP_DMA */ - buf = kmalloc(count, GFP_KERNEL | GFP_DMA); - if (!buf) - return -ENOMEM; - - if (copy_from_user(buf, udata, count)) { - rc = -EFAULT; - goto fail_kfree_buf; - } - - cpa = alloc_chan_prog(buf, count, reclen); - if (!cpa) { - rc = -ENOMEM; - goto fail_kfree_buf; - } + cpa = alloc_chan_prog(udata, count / reclen, reclen); + if (IS_ERR(cpa)) + return PTR_ERR(cpa); rc = do_ur_io(urd, cpa); if (rc) @@ -354,10 +354,9 @@ static ssize_t do_write(struct urdev *urd, const char __user *udata, } *ppos += count; rc = count; + fail_kfree_cpa: - kfree(cpa); -fail_kfree_buf: - kfree(buf); + free_chan_prog(cpa); return rc; } @@ -473,7 +472,7 @@ static ssize_t diag14_read(struct file *file, char __user *ubuf, size_t count, return rc; len = min((size_t) PAGE_SIZE, count); - buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + buf = (char *) __get_free_page(GFP_KERNEL | GFP_DMA); if (!buf) return -ENOMEM; @@ -486,7 +485,7 @@ static ssize_t diag14_read(struct file *file, char __user *ubuf, size_t count, } if (rc) goto fail; - if (reclen) + if (reclen && (copied == 0) && (*offs < PAGE_SIZE)) *((u16 *) &buf[FILE_RECLEN_OFFSET]) = reclen; len = min(count - copied, PAGE_SIZE - res); if (copy_to_user(ubuf + copied, buf + res, len)) { @@ -500,7 +499,7 @@ static ssize_t diag14_read(struct file *file, char __user *ubuf, size_t count, *offs += copied; rc = copied; fail: - kfree(buf); + free_page((unsigned long) buf); return rc; } @@ -543,56 +542,97 @@ static int diag_read_next_file_info(struct file_control_block *buf, int spid) } } -static int verify_device(struct urdev *urd) +static int verify_uri_device(struct urdev *urd) { - struct file_control_block fcb; + struct file_control_block *fcb; char *buf; int rc; + fcb = kmalloc(sizeof(*fcb), GFP_KERNEL | GFP_DMA); + if (!fcb) + return -ENOMEM; + + /* check for empty reader device (beginning of chain) */ + rc = diag_read_next_file_info(fcb, 0); + if (rc) + goto fail_free_fcb; + + /* if file is in hold status, we do not read it */ + if (fcb->file_stat & (FLG_SYSTEM_HOLD | FLG_USER_HOLD)) { + rc = -EPERM; + goto fail_free_fcb; + } + + /* open file on virtual reader */ + buf = (char *) __get_free_page(GFP_KERNEL | GFP_DMA); + if (!buf) { + rc = -ENOMEM; + goto fail_free_fcb; + } + rc = diag_read_file(urd->dev_id.devno, buf); + if ((rc != 0) && (rc != -ENODATA)) /* EOF does not hurt */ + goto fail_free_buf; + + /* check if the file on top of the queue is open now */ + rc = diag_read_next_file_info(fcb, 0); + if (rc) + goto fail_free_buf; + if (!(fcb->file_stat & FLG_IN_USE)) { + rc = -EMFILE; + goto fail_free_buf; + } + rc = 0; + +fail_free_buf: + free_page((unsigned long) buf); +fail_free_fcb: + kfree(fcb); + return rc; +} + +static int verify_device(struct urdev *urd) +{ switch (urd->class) { case DEV_CLASS_UR_O: return 0; /* no check needed here */ case DEV_CLASS_UR_I: - /* check for empty reader device (beginning of chain) */ - rc = diag_read_next_file_info(&fcb, 0); - if (rc) - return rc; - - /* open file on virtual reader */ - buf = kmalloc(PAGE_SIZE, GFP_KERNEL); - if (!buf) - return -ENOMEM; - rc = diag_read_file(urd->dev_id.devno, buf); - kfree(buf); - - if ((rc != 0) && (rc != -ENODATA)) /* EOF does not hurt */ - return rc; - return 0; + return verify_uri_device(urd); default: return -ENOTSUPP; } } -static int get_file_reclen(struct urdev *urd) +static int get_uri_file_reclen(struct urdev *urd) { - struct file_control_block fcb; + struct file_control_block *fcb; int rc; + fcb = kmalloc(sizeof(*fcb), GFP_KERNEL | GFP_DMA); + if (!fcb) + return -ENOMEM; + rc = diag_read_next_file_info(fcb, 0); + if (rc) + goto fail_free; + if (fcb->file_stat & FLG_CP_DUMP) + rc = 0; + else + rc = fcb->rec_len; + +fail_free: + kfree(fcb); + return rc; +} + +static int get_file_reclen(struct urdev *urd) +{ switch (urd->class) { case DEV_CLASS_UR_O: return 0; case DEV_CLASS_UR_I: - rc = diag_read_next_file_info(&fcb, 0); - if (rc) - return rc; - break; + return get_uri_file_reclen(urd); default: return -ENOTSUPP; } - if (fcb.file_stat & FLG_CP_DUMP) - return 0; - - return fcb.rec_len; } static int ur_open(struct inode *inode, struct file *file) diff --git a/drivers/s390/char/vmur.h b/drivers/s390/char/vmur.h index 16d0a4e38e40..2b3c564e0472 100644 --- a/drivers/s390/char/vmur.h +++ b/drivers/s390/char/vmur.h @@ -50,7 +50,10 @@ struct file_control_block { char rest[200]; } __attribute__ ((packed)); -#define FLG_CP_DUMP 0x10 +#define FLG_SYSTEM_HOLD 0x04 +#define FLG_CP_DUMP 0x10 +#define FLG_USER_HOLD 0x20 +#define FLG_IN_USE 0x80 /* * A struct urdev is created for each ur device that is made available |