diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c index 72f69fda9d01a7a25e27c33b7c0031427538c692..4c9030a5b9f268b4a78f43688ada94a383315438 100644 --- a/drivers/s390/char/raw3270.c +++ b/drivers/s390/char/raw3270.c @@ -37,6 +37,7 @@ struct raw3270 { int minor; short model, rows, cols; + unsigned int state; unsigned long flags; struct list_head req_queue; /* Request queue. */ @@ -47,17 +48,25 @@ struct raw3270 { unsigned char *ascebc; /* ascii -> ebcdic table */ - struct raw3270_request init_request; + struct raw3270_view init_view; + struct raw3270_request init_reset; + struct raw3270_request init_readpart; + struct raw3270_request init_readmod; unsigned char init_data[256]; }; +/* raw3270->state */ +#define RAW3270_STATE_INIT 0 /* Initial state */ +#define RAW3270_STATE_RESET 1 /* Reset command is pending */ +#define RAW3270_STATE_W4ATTN 2 /* Wait for attention interrupt */ +#define RAW3270_STATE_READMOD 3 /* Read partition is pending */ +#define RAW3270_STATE_READY 4 /* Device is usable by views */ + /* raw3270->flags */ #define RAW3270_FLAGS_14BITADDR 0 /* 14-bit buffer addresses */ #define RAW3270_FLAGS_BUSY 1 /* Device busy, leave it alone */ -#define RAW3270_FLAGS_ATTN 2 /* Device sent an ATTN interrupt */ -#define RAW3270_FLAGS_READY 4 /* Device is useable by views */ -#define RAW3270_FLAGS_CONSOLE 8 /* Device is the console. */ -#define RAW3270_FLAGS_FROZEN 16 /* set if 3270 is frozen for suspend */ +#define RAW3270_FLAGS_CONSOLE 2 /* Device is the console. */ +#define RAW3270_FLAGS_FROZEN 3 /* set if 3270 is frozen for suspend */ /* Semaphore to protect global data of raw3270 (devices, views, etc). */ static DEFINE_MUTEX(raw3270_mutex); @@ -95,6 +104,17 @@ static unsigned char raw3270_ebcgraf[64] = { 0xf8, 0xf9, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f }; +static inline int raw3270_state_ready(struct raw3270 *rp) +{ + return rp->state == RAW3270_STATE_READY; +} + +static inline int raw3270_state_final(struct raw3270 *rp) +{ + return rp->state == RAW3270_STATE_INIT || + rp->state == RAW3270_STATE_READY; +} + void raw3270_buffer_address(struct raw3270 *rp, char *cp, unsigned short addr) { @@ -212,7 +232,7 @@ raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib) * Stop running ccw. */ static int -raw3270_halt_io_nolock(struct raw3270 *rp, struct raw3270_request *rq) +__raw3270_halt_io(struct raw3270 *rp, struct raw3270_request *rq) { int retries; int rc; @@ -231,18 +251,6 @@ raw3270_halt_io_nolock(struct raw3270 *rp, struct raw3270_request *rq) return rc; } -static int -raw3270_halt_io(struct raw3270 *rp, struct raw3270_request *rq) -{ - unsigned long flags; - int rc; - - spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); - rc = raw3270_halt_io_nolock(rp, rq); - spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); - return rc; -} - /* * Add the request to the request queue, try to start it if the * 3270 device is idle. Return without waiting for end of i/o. @@ -279,8 +287,8 @@ raw3270_start(struct raw3270_view *view, struct raw3270_request *rq) if (!rp || rp->view != view || test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) rc = -EACCES; - else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) - rc = -ENODEV; + else if (!raw3270_state_ready(rp)) + rc = -EBUSY; else rc = __raw3270_start(rp, view, rq); spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); @@ -297,8 +305,8 @@ raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq) if (!rp || rp->view != view || test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) rc = -EACCES; - else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) - rc = -ENODEV; + else if (!raw3270_state_ready(rp)) + rc = -EBUSY; else rc = __raw3270_start(rp, view, rq); return rc; @@ -376,7 +384,7 @@ raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb) case RAW3270_IO_STOP: if (!rq) break; - raw3270_halt_io_nolock(rp, rq); + __raw3270_halt_io(rp, rq); rq->rc = -EIO; break; default: @@ -411,9 +419,14 @@ raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb) } /* - * Size sensing. + * To determine the size of the 3270 device we need to do: + * 1) send a 'read partition' data stream to the device + * 2) wait for the attn interrupt that precedes the query reply + * 3) do a read modified to get the query reply + * To make things worse we have to cope with intervention + * required (3270 device switched to 'stand-by') and command + * rejects (old devices that can't do 'read partition'). */ - struct raw3270_ua { /* Query Reply structure for Usable Area */ struct { /* Usable Area Query Reply Base */ short l; /* Length of this structured field */ @@ -449,117 +462,21 @@ struct raw3270_ua { /* Query Reply structure for Usable Area */ } __attribute__ ((packed)) aua; } __attribute__ ((packed)); -static struct diag210 raw3270_init_diag210; -static DEFINE_MUTEX(raw3270_init_mutex); - -static int -raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq, - struct irb *irb) -{ - /* - * Unit-Check Processing: - * Expect Command Reject or Intervention Required. - */ - if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { - /* Request finished abnormally. */ - if (irb->ecw[0] & SNS0_INTERVENTION_REQ) { - set_bit(RAW3270_FLAGS_BUSY, &view->dev->flags); - return RAW3270_IO_BUSY; - } - } - if (rq) { - if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { - if (irb->ecw[0] & SNS0_CMD_REJECT) - rq->rc = -EOPNOTSUPP; - else - rq->rc = -EIO; - } else - /* Request finished normally. Copy residual count. */ - rq->rescnt = irb->scsw.cmd.count; - } - if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { - set_bit(RAW3270_FLAGS_ATTN, &view->dev->flags); - wake_up(&raw3270_wait_queue); - } - return RAW3270_IO_DONE; -} - -static struct raw3270_fn raw3270_init_fn = { - .intv = raw3270_init_irq -}; - -static struct raw3270_view raw3270_init_view = { - .fn = &raw3270_init_fn -}; - -/* - * raw3270_wait/raw3270_wait_interruptible/__raw3270_wakeup - * Wait for end of request. The request must have been started - * with raw3270_start, rc = 0. The device lock may NOT have been - * released between calling raw3270_start and raw3270_wait. - */ static void -raw3270_wake_init(struct raw3270_request *rq, void *data) -{ - wake_up((wait_queue_head_t *) data); -} - -/* - * Special wait function that can cope with console initialization. - */ -static int -raw3270_start_init(struct raw3270 *rp, struct raw3270_view *view, - struct raw3270_request *rq) -{ - unsigned long flags; - int rc; - -#ifdef CONFIG_TN3270_CONSOLE - if (raw3270_registered == 0) { - spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); - rq->callback = NULL; - rc = __raw3270_start(rp, view, rq); - if (rc == 0) - while (!raw3270_request_final(rq)) { - wait_cons_dev(); - barrier(); - } - spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); - return rq->rc; - } -#endif - rq->callback = raw3270_wake_init; - rq->callback_data = &raw3270_wait_queue; - spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags); - rc = __raw3270_start(rp, view, rq); - spin_unlock_irqrestore(get_ccwdev_lock(view->dev->cdev), flags); - if (rc) - return rc; - /* Now wait for the completion. */ - rc = wait_event_interruptible(raw3270_wait_queue, - raw3270_request_final(rq)); - if (rc == -ERESTARTSYS) { /* Interrupted by a signal. */ - raw3270_halt_io(view->dev, rq); - /* No wait for the halt to complete. */ - wait_event(raw3270_wait_queue, raw3270_request_final(rq)); - return -ERESTARTSYS; - } - return rq->rc; -} - -static int -__raw3270_size_device_vm(struct raw3270 *rp) +raw3270_size_device_vm(struct raw3270 *rp) { int rc, model; struct ccw_dev_id dev_id; + struct diag210 diag_data; ccw_device_get_id(rp->cdev, &dev_id); - raw3270_init_diag210.vrdcdvno = dev_id.devno; - raw3270_init_diag210.vrdclen = sizeof(struct diag210); - rc = diag210(&raw3270_init_diag210); - if (rc) - return rc; - model = raw3270_init_diag210.vrdccrmd; + diag_data.vrdcdvno = dev_id.devno; + diag_data.vrdclen = sizeof(struct diag210); + rc = diag210(&diag_data); + model = diag_data.vrdccrmd; + /* Use default model 2 if the size could not be detected */ + if (rc || model < 2 || model > 5) + model = 2; switch (model) { case 2: rp->model = model; @@ -581,77 +498,25 @@ __raw3270_size_device_vm(struct raw3270 *rp) rp->rows = 27; rp->cols = 132; break; - default: - rc = -EOPNOTSUPP; - break; } - return rc; } -static int -__raw3270_size_device(struct raw3270 *rp) +static void +raw3270_size_device(struct raw3270 *rp) { - static const unsigned char wbuf[] = - { 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 }; struct raw3270_ua *uap; - int rc; - /* - * To determine the size of the 3270 device we need to do: - * 1) send a 'read partition' data stream to the device - * 2) wait for the attn interrupt that precedes the query reply - * 3) do a read modified to get the query reply - * To make things worse we have to cope with intervention - * required (3270 device switched to 'stand-by') and command - * rejects (old devices that can't do 'read partition'). - */ - memset(&rp->init_request, 0, sizeof(rp->init_request)); - memset(&rp->init_data, 0, 256); - /* Store 'read partition' data stream to init_data */ - memcpy(&rp->init_data, wbuf, sizeof(wbuf)); - INIT_LIST_HEAD(&rp->init_request.list); - rp->init_request.ccw.cmd_code = TC_WRITESF; - rp->init_request.ccw.flags = CCW_FLAG_SLI; - rp->init_request.ccw.count = sizeof(wbuf); - rp->init_request.ccw.cda = (__u32) __pa(&rp->init_data); - - rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); - if (rc) - /* Check error cases: -ERESTARTSYS, -EIO and -EOPNOTSUPP */ - return rc; - - /* Wait for attention interrupt. */ -#ifdef CONFIG_TN3270_CONSOLE - if (raw3270_registered == 0) { - unsigned long flags; - - spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); - while (!test_and_clear_bit(RAW3270_FLAGS_ATTN, &rp->flags)) - wait_cons_dev(); - spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); - } else -#endif - rc = wait_event_interruptible(raw3270_wait_queue, - test_and_clear_bit(RAW3270_FLAGS_ATTN, &rp->flags)); - if (rc) - return rc; - - /* - * The device accepted the 'read partition' command. Now - * set up a read ccw and issue it. - */ - rp->init_request.ccw.cmd_code = TC_READMOD; - rp->init_request.ccw.flags = CCW_FLAG_SLI; - rp->init_request.ccw.count = sizeof(rp->init_data); - rp->init_request.ccw.cda = (__u32) __pa(rp->init_data); - rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); - if (rc) - return rc; /* Got a Query Reply */ uap = (struct raw3270_ua *) (rp->init_data + 1); /* Paranoia check. */ - if (rp->init_data[0] != 0x88 || uap->uab.qcode != 0x81) - return -EOPNOTSUPP; + if (rp->init_readmod.rc || rp->init_data[0] != 0x88 || + uap->uab.qcode != 0x81) { + /* Couldn't detect size. Use default model 2. */ + rp->model = 2; + rp->rows = 24; + rp->cols = 80; + return; + } /* Copy rows/columns of default Usable Area */ rp->rows = uap->uab.h; rp->cols = uap->uab.w; @@ -664,66 +529,131 @@ __raw3270_size_device(struct raw3270 *rp) rp->rows = uap->aua.hauai; rp->cols = uap->aua.wauai; } - return 0; + /* Try to find a model. */ + rp->model = 0; + if (rp->rows == 24 && rp->cols == 80) + rp->model = 2; + if (rp->rows == 32 && rp->cols == 80) + rp->model = 3; + if (rp->rows == 43 && rp->cols == 80) + rp->model = 4; + if (rp->rows == 27 && rp->cols == 132) + rp->model = 5; } -static int -raw3270_size_device(struct raw3270 *rp) +static void +raw3270_size_device_done(struct raw3270 *rp) { - int rc; + struct raw3270_view *view; - mutex_lock(&raw3270_init_mutex); - rp->view = &raw3270_init_view; - raw3270_init_view.dev = rp; - if (MACHINE_IS_VM) - rc = __raw3270_size_device_vm(rp); - else - rc = __raw3270_size_device(rp); - raw3270_init_view.dev = NULL; rp->view = NULL; - mutex_unlock(&raw3270_init_mutex); - if (rc == 0) { /* Found something. */ - /* Try to find a model. */ - rp->model = 0; - if (rp->rows == 24 && rp->cols == 80) - rp->model = 2; - if (rp->rows == 32 && rp->cols == 80) - rp->model = 3; - if (rp->rows == 43 && rp->cols == 80) - rp->model = 4; - if (rp->rows == 27 && rp->cols == 132) - rp->model = 5; - } else { - /* Couldn't detect size. Use default model 2. */ - rp->model = 2; - rp->rows = 24; - rp->cols = 80; - return 0; + rp->state = RAW3270_STATE_READY; + /* Notify views about new size */ + list_for_each_entry(view, &rp->view_list, list) + if (view->fn->resize) + view->fn->resize(view, rp->model, rp->rows, rp->cols); + /* Setup processing done, now activate a view */ + list_for_each_entry(view, &rp->view_list, list) { + rp->view = view; + if (view->fn->activate(view) == 0) + break; + rp->view = NULL; } - return rc; +} + +static void +raw3270_read_modified_cb(struct raw3270_request *rq, void *data) +{ + struct raw3270 *rp = rq->view->dev; + + raw3270_size_device(rp); + raw3270_size_device_done(rp); +} + +static void +raw3270_read_modified(struct raw3270 *rp) +{ + if (rp->state != RAW3270_STATE_W4ATTN) + return; + /* Use 'read modified' to get the result of a read partition. */ + memset(&rp->init_readmod, 0, sizeof(rp->init_readmod)); + memset(&rp->init_data, 0, sizeof(rp->init_data)); + rp->init_readmod.ccw.cmd_code = TC_READMOD; + rp->init_readmod.ccw.flags = CCW_FLAG_SLI; + rp->init_readmod.ccw.count = sizeof(rp->init_data); + rp->init_readmod.ccw.cda = (__u32) __pa(rp->init_data); + rp->init_readmod.callback = raw3270_read_modified_cb; + rp->state = RAW3270_STATE_READMOD; + raw3270_start_irq(&rp->init_view, &rp->init_readmod); +} + +static void +raw3270_writesf_readpart(struct raw3270 *rp) +{ + static const unsigned char wbuf[] = + { 0x00, 0x07, 0x01, 0xff, 0x03, 0x00, 0x81 }; + + /* Store 'read partition' data stream to init_data */ + memset(&rp->init_readpart, 0, sizeof(rp->init_readpart)); + memset(&rp->init_data, 0, sizeof(rp->init_data)); + memcpy(&rp->init_data, wbuf, sizeof(wbuf)); + rp->init_readpart.ccw.cmd_code = TC_WRITESF; + rp->init_readpart.ccw.flags = CCW_FLAG_SLI; + rp->init_readpart.ccw.count = sizeof(wbuf); + rp->init_readpart.ccw.cda = (__u32) __pa(&rp->init_data); + rp->state = RAW3270_STATE_W4ATTN; + raw3270_start_irq(&rp->init_view, &rp->init_readpart); +} + +/* + * Device reset + */ +static void +raw3270_reset_device_cb(struct raw3270_request *rq, void *data) +{ + struct raw3270 *rp = rq->view->dev; + + if (rp->state != RAW3270_STATE_RESET) + return; + if (rq && rq->rc) { + /* Reset command failed. */ + rp->state = RAW3270_STATE_INIT; + } else if (0 && MACHINE_IS_VM) { + raw3270_size_device_vm(rp); + raw3270_size_device_done(rp); + } else + raw3270_writesf_readpart(rp); } static int -raw3270_reset_device(struct raw3270 *rp) +__raw3270_reset_device(struct raw3270 *rp) { int rc; - mutex_lock(&raw3270_init_mutex); - memset(&rp->init_request, 0, sizeof(rp->init_request)); + /* Store reset data stream to init_data/init_reset */ + memset(&rp->init_reset, 0, sizeof(rp->init_reset)); memset(&rp->init_data, 0, sizeof(rp->init_data)); - /* Store reset data stream to init_data/init_request */ rp->init_data[0] = TW_KR; - INIT_LIST_HEAD(&rp->init_request.list); - rp->init_request.ccw.cmd_code = TC_EWRITEA; - rp->init_request.ccw.flags = CCW_FLAG_SLI; - rp->init_request.ccw.count = 1; - rp->init_request.ccw.cda = (__u32) __pa(rp->init_data); - rp->view = &raw3270_init_view; - raw3270_init_view.dev = rp; - rc = raw3270_start_init(rp, &raw3270_init_view, &rp->init_request); - raw3270_init_view.dev = NULL; - rp->view = NULL; - mutex_unlock(&raw3270_init_mutex); + rp->init_reset.ccw.cmd_code = TC_EWRITEA; + rp->init_reset.ccw.flags = CCW_FLAG_SLI; + rp->init_reset.ccw.count = 1; + rp->init_reset.ccw.cda = (__u32) __pa(rp->init_data); + rp->init_reset.callback = raw3270_reset_device_cb; + rc = __raw3270_start(rp, &rp->init_view, &rp->init_reset); + if (rc == 0 && rp->state == RAW3270_STATE_INIT) + rp->state = RAW3270_STATE_RESET; + return rc; +} + +static int +raw3270_reset_device(struct raw3270 *rp) +{ + unsigned long flags; + int rc; + + spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); + rc = __raw3270_reset_device(rp); + spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); return rc; } @@ -737,13 +667,50 @@ raw3270_reset(struct raw3270_view *view) if (!rp || rp->view != view || test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) rc = -EACCES; - else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) - rc = -ENODEV; + else if (!raw3270_state_ready(rp)) + rc = -EBUSY; else rc = raw3270_reset_device(view->dev); return rc; } +static int +raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq, + struct irb *irb) +{ + struct raw3270 *rp; + + /* + * Unit-Check Processing: + * Expect Command Reject or Intervention Required. + */ + if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { + /* Request finished abnormally. */ + if (irb->ecw[0] & SNS0_INTERVENTION_REQ) { + set_bit(RAW3270_FLAGS_BUSY, &view->dev->flags); + return RAW3270_IO_BUSY; + } + } + if (rq) { + if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { + if (irb->ecw[0] & SNS0_CMD_REJECT) + rq->rc = -EOPNOTSUPP; + else + rq->rc = -EIO; + } + } + if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { + /* Queue read modified after attention interrupt */ + rp = view->dev; + raw3270_read_modified(rp); + } + return RAW3270_IO_DONE; +} + +static struct raw3270_fn raw3270_init_fn = { + .intv = raw3270_init_irq +}; + /* * Setup new 3270 device. */ @@ -772,6 +739,10 @@ raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc) INIT_LIST_HEAD(&rp->req_queue); INIT_LIST_HEAD(&rp->view_list); + rp->init_view.dev = rp; + rp->init_view.fn = &raw3270_init_fn; + rp->view = &rp->init_view; + /* * Add device to list and find the smallest unused minor * number for it. Note: there is no device with minor 0, @@ -810,6 +781,7 @@ raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc) */ struct raw3270 __init *raw3270_setup_console(struct ccw_device *cdev) { + unsigned long flags; struct raw3270 *rp; char *ascebc; int rc; @@ -820,16 +792,15 @@ struct raw3270 __init *raw3270_setup_console(struct ccw_device *cdev) if (rc) return ERR_PTR(rc); set_bit(RAW3270_FLAGS_CONSOLE, &rp->flags); - rc = raw3270_reset_device(rp); - if (rc) - return ERR_PTR(rc); - rc = raw3270_size_device(rp); - if (rc) - return ERR_PTR(rc); - rc = raw3270_reset_device(rp); - if (rc) - return ERR_PTR(rc); - set_bit(RAW3270_FLAGS_READY, &rp->flags); + spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); + do { + __raw3270_reset_device(rp); + while (!raw3270_state_final(rp)) { + wait_cons_dev(); + barrier(); + } + } while (rp->state != RAW3270_STATE_READY); + spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); return rp; } @@ -891,13 +862,13 @@ raw3270_activate_view(struct raw3270_view *view) spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); if (rp->view == view) rc = 0; - else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags)) - rc = -ENODEV; + else if (!raw3270_state_ready(rp)) + rc = -EBUSY; else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) rc = -EACCES; else { oldview = NULL; - if (rp->view) { + if (rp->view && rp->view->fn->deactivate) { oldview = rp->view; oldview->fn->deactivate(oldview); } @@ -942,7 +913,7 @@ raw3270_deactivate_view(struct raw3270_view *view) list_del_init(&view->list); list_add_tail(&view->list, &rp->view_list); /* Try to activate another view. */ - if (test_bit(RAW3270_FLAGS_READY, &rp->flags) && + if (raw3270_state_ready(rp) && !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { list_for_each_entry(view, &rp->view_list, list) { rp->view = view; @@ -973,18 +944,16 @@ raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor) if (rp->minor != minor) continue; spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); - if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { - atomic_set(&view->ref_count, 2); - view->dev = rp; - view->fn = fn; - view->model = rp->model; - view->rows = rp->rows; - view->cols = rp->cols; - view->ascebc = rp->ascebc; - spin_lock_init(&view->lock); - list_add(&view->list, &rp->view_list); - rc = 0; - } + atomic_set(&view->ref_count, 2); + view->dev = rp; + view->fn = fn; + view->model = rp->model; + view->rows = rp->rows; + view->cols = rp->cols; + view->ascebc = rp->ascebc; + spin_lock_init(&view->lock); + list_add(&view->list, &rp->view_list); + rc = 0; spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); break; } @@ -1008,14 +977,11 @@ raw3270_find_view(struct raw3270_fn *fn, int minor) if (rp->minor != minor) continue; spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); - if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) { - view = ERR_PTR(-ENOENT); - list_for_each_entry(tmp, &rp->view_list, list) { - if (tmp->fn == fn) { - raw3270_get_view(tmp); - view = tmp; - break; - } + list_for_each_entry(tmp, &rp->view_list, list) { + if (tmp->fn == fn) { + raw3270_get_view(tmp); + view = tmp; + break; } } spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); @@ -1042,7 +1008,7 @@ raw3270_del_view(struct raw3270_view *view) rp->view = NULL; } list_del_init(&view->list); - if (!rp->view && test_bit(RAW3270_FLAGS_READY, &rp->flags) && + if (!rp->view && raw3270_state_ready(rp) && !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) { /* Try to activate another view. */ list_for_each_entry(nv, &rp->view_list, list) { @@ -1177,19 +1143,10 @@ raw3270_set_online (struct ccw_device *cdev) rp = raw3270_create_device(cdev); if (IS_ERR(rp)) return PTR_ERR(rp); - rc = raw3270_reset_device(rp); - if (rc) - goto failure; - rc = raw3270_size_device(rp); - if (rc) - goto failure; - rc = raw3270_reset_device(rp); - if (rc) - goto failure; rc = raw3270_create_attributes(rp); if (rc) goto failure; - set_bit(RAW3270_FLAGS_READY, &rp->flags); + raw3270_reset_device(rp); mutex_lock(&raw3270_mutex); list_for_each_entry(np, &raw3270_notifier, list) np->create(rp->minor); @@ -1221,14 +1178,14 @@ raw3270_remove (struct ccw_device *cdev) */ if (rp == NULL) return; - clear_bit(RAW3270_FLAGS_READY, &rp->flags); sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group); /* Deactivate current view and remove all views. */ spin_lock_irqsave(get_ccwdev_lock(cdev), flags); if (rp->view) { - rp->view->fn->deactivate(rp->view); + if (rp->view->fn->deactivate) + rp->view->fn->deactivate(rp->view); rp->view = NULL; } while (!list_empty(&rp->view_list)) { @@ -1277,7 +1234,7 @@ static int raw3270_pm_stop(struct ccw_device *cdev) if (!rp) return 0; spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); - if (rp->view) + if (rp->view && rp->view->fn->deactivate) rp->view->fn->deactivate(rp->view); if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) { /* @@ -1304,7 +1261,7 @@ static int raw3270_pm_start(struct ccw_device *cdev) return 0; spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags); clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags); - if (rp->view) + if (rp->view && rp->view->fn->activate) rp->view->fn->activate(rp->view); spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags); return 0; diff --git a/drivers/s390/char/raw3270.h b/drivers/s390/char/raw3270.h index a4c79d043cd31667cec8ec7d752ee19863df5f4e..7b73ff8c1bd7a59a5c60fe9d7886371c48d4d2c4 100644 --- a/drivers/s390/char/raw3270.h +++ b/drivers/s390/char/raw3270.h @@ -141,6 +141,7 @@ struct raw3270_fn { struct raw3270_request *, struct irb *); void (*release)(struct raw3270_view *); void (*free)(struct raw3270_view *); + void (*resize)(struct raw3270_view *, int, int, int); }; /* diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c index 48767e6bab9d4654c09223398cb8c08508c65535..8f1e02543adaf948405f7960700f730ac4f86356 100644 --- a/drivers/s390/char/tty3270.c +++ b/drivers/s390/char/tty3270.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -80,6 +81,8 @@ struct tty3270 { unsigned int highlight; /* Blink/reverse/underscore */ unsigned int f_color; /* Foreground color */ struct tty3270_line *screen; + unsigned int n_model, n_cols, n_rows; /* New model & size */ + struct work_struct resize_work; /* Input stuff. */ struct string *prompt; /* Output string for input area. */ @@ -115,6 +118,7 @@ struct tty3270 { #define TTY_UPDATE_ALL 16 /* Recreate screen. */ static void tty3270_update(struct tty3270 *); +static void tty3270_resize_work(struct work_struct *work); /* * Setup timeout for a device. On timeout trigger an update. @@ -711,6 +715,7 @@ tty3270_alloc_view(void) tasklet_init(&tp->readlet, (void (*)(unsigned long)) tty3270_read_tasklet, (unsigned long) tp->read); + INIT_WORK(&tp->resize_work, tty3270_resize_work); return tp; @@ -754,42 +759,96 @@ tty3270_free_view(struct tty3270 *tp) /* * Allocate tty3270 screen. */ -static int -tty3270_alloc_screen(struct tty3270 *tp) +static struct tty3270_line * +tty3270_alloc_screen(unsigned int rows, unsigned int cols) { + struct tty3270_line *screen; unsigned long size; int lines; - size = sizeof(struct tty3270_line) * (tp->view.rows - 2); - tp->screen = kzalloc(size, GFP_KERNEL); - if (!tp->screen) + size = sizeof(struct tty3270_line) * (rows - 2); + screen = kzalloc(size, GFP_KERNEL); + if (!screen) goto out_err; - for (lines = 0; lines < tp->view.rows - 2; lines++) { - size = sizeof(struct tty3270_cell) * tp->view.cols; - tp->screen[lines].cells = kzalloc(size, GFP_KERNEL); - if (!tp->screen[lines].cells) + for (lines = 0; lines < rows - 2; lines++) { + size = sizeof(struct tty3270_cell) * cols; + screen[lines].cells = kzalloc(size, GFP_KERNEL); + if (!screen[lines].cells) goto out_screen; } - return 0; + return screen; out_screen: while (lines--) - kfree(tp->screen[lines].cells); - kfree(tp->screen); + kfree(screen[lines].cells); + kfree(screen); out_err: - return -ENOMEM; + return ERR_PTR(-ENOMEM); } /* * Free tty3270 screen. */ static void -tty3270_free_screen(struct tty3270 *tp) +tty3270_free_screen(struct tty3270_line *screen, unsigned int rows) { int lines; - for (lines = 0; lines < tp->view.rows - 2; lines++) - kfree(tp->screen[lines].cells); - kfree(tp->screen); + for (lines = 0; lines < rows - 2; lines++) + kfree(screen[lines].cells); + kfree(screen); +} + +/* + * Resize tty3270 screen + */ +static void tty3270_resize_work(struct work_struct *work) +{ + struct tty3270 *tp = container_of(work, struct tty3270, resize_work); + struct tty3270_line *screen, *oscreen; + struct tty_struct *tty; + unsigned int orows; + struct winsize ws; + + screen = tty3270_alloc_screen(tp->n_rows, tp->n_cols); + if (!screen) + return; + /* Switch to new output size */ + spin_lock_bh(&tp->view.lock); + oscreen = tp->screen; + orows = tp->view.rows; + tp->view.model = tp->n_model; + tp->view.rows = tp->n_rows; + tp->view.cols = tp->n_cols; + tp->screen = screen; + free_string(&tp->freemem, tp->prompt); + free_string(&tp->freemem, tp->status); + tty3270_create_prompt(tp); + tty3270_create_status(tp); + tp->nr_up = 0; + while (tp->nr_lines < tp->view.rows - 2) + tty3270_blank_line(tp); + tp->update_flags = TTY_UPDATE_ALL; + spin_unlock_bh(&tp->view.lock); + tty3270_free_screen(oscreen, orows); + tty3270_set_timer(tp, 1); + /* Informat tty layer about new size */ + tty = tty_port_tty_get(&tp->port); + if (!tty) + return; + ws.ws_row = tp->view.rows - 2; + ws.ws_col = tp->view.cols; + tty_do_resize(tty, &ws); +} + +static void +tty3270_resize(struct raw3270_view *view, int model, int rows, int cols) +{ + struct tty3270 *tp = container_of(view, struct tty3270, view); + + tp->n_model = model; + tp->n_rows = rows; + tp->n_cols = cols; + schedule_work(&tp->resize_work); } /* @@ -817,7 +876,8 @@ static void tty3270_free(struct raw3270_view *view) { struct tty3270 *tp = container_of(view, struct tty3270, view); - tty3270_free_screen(tp); + + tty3270_free_screen(tp->screen, tp->view.rows); tty3270_free_view(tp); } @@ -841,7 +901,8 @@ static struct raw3270_fn tty3270_fn = { .deactivate = tty3270_deactivate, .intv = (void *) tty3270_irq, .release = tty3270_release, - .free = tty3270_free + .free = tty3270_free, + .resize = tty3270_resize }; /* @@ -869,10 +930,6 @@ static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty) if (tty3270_max_index < tty->index) tty3270_max_index = tty->index; - /* Quick exit if there is no device for tty->index. */ - if (PTR_ERR(view) == -ENODEV) - return -ENODEV; - /* Allocate tty3270 structure on first open. */ tp = tty3270_alloc_view(); if (IS_ERR(tp)) @@ -884,10 +941,12 @@ static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty) return rc; } - rc = tty3270_alloc_screen(tp); - if (rc) { + tp->screen = tty3270_alloc_screen(tp->view.cols, tp->view.rows); + if (IS_ERR(tp->screen)) { + rc = PTR_ERR(tp->screen); raw3270_put_view(&tp->view); raw3270_del_view(&tp->view); + tty3270_free_view(tp); return rc; } diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index da9fde85075499404c3e77ffb9291ac58f5d7785..3f00f9e8daf2d22b4bc2e28fcdc27252015aa98d 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -2203,6 +2203,7 @@ int tty_do_resize(struct tty_struct *tty, struct winsize *ws) mutex_unlock(&tty->termios_mutex); return 0; } +EXPORT_SYMBOL(tty_do_resize); /** * tiocswinsz - implement window size set ioctl