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-rw-r--r--drivers/s390/char/raw3270.c535
-rw-r--r--drivers/s390/char/raw3270.h1
-rw-r--r--drivers/s390/char/tty3270.c109
-rw-r--r--drivers/tty/tty_io.c1
4 files changed, 332 insertions, 314 deletions
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index 72f69fda9d0..4c9030a5b9f 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 a4c79d043cd..7b73ff8c1bd 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 48767e6bab9..8f1e02543ad 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -15,6 +15,7 @@
#include <linux/init.h>
#include <linux/console.h>
#include <linux/interrupt.h>
+#include <linux/workqueue.h>
#include <linux/slab.h>
#include <linux/bootmem.h>
@@ -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 da9fde85075..3f00f9e8daf 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -2203,6 +2203,7 @@ done:
mutex_unlock(&tty->termios_mutex);
return 0;
}
+EXPORT_SYMBOL(tty_do_resize);
/**
* tiocswinsz - implement window size set ioctl
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-22 01:01:58 +0000