--- /dev/null
+/*
+ * Driver for s390 chsc subchannels
+ *
+ * Copyright IBM Corp. 2008, 2011
+ *
+ * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/compat.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/uaccess.h>
+#include <linux/miscdevice.h>
+#include <linux/kernel_stat.h>
+
+#include <asm/compat.h>
+#include <asm/cio.h>
+#include <asm/chsc.h>
+#include <asm/isc.h>
+
+#include "cio.h"
+#include "cio_debug.h"
+#include "css.h"
+#include "chsc_sch.h"
+#include "ioasm.h"
+
+static debug_info_t *chsc_debug_msg_id;
+static debug_info_t *chsc_debug_log_id;
+
+static struct chsc_request *on_close_request;
+static struct chsc_async_area *on_close_chsc_area;
+static DEFINE_MUTEX(on_close_mutex);
+
+#define CHSC_MSG(imp, args...) do { \
+ debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \
+ } while (0)
+
+#define CHSC_LOG(imp, txt) do { \
+ debug_text_event(chsc_debug_log_id, imp , txt); \
+ } while (0)
+
+static void CHSC_LOG_HEX(int level, void *data, int length)
+{
+ while (length > 0) {
+ debug_event(chsc_debug_log_id, level, data, length);
+ length -= chsc_debug_log_id->buf_size;
+ data += chsc_debug_log_id->buf_size;
+ }
+}
+
+MODULE_AUTHOR("IBM Corporation");
+MODULE_DESCRIPTION("driver for s390 chsc subchannels");
+MODULE_LICENSE("GPL");
+
+static void chsc_subchannel_irq(struct subchannel *sch)
+{
+ struct chsc_private *private = dev_get_drvdata(&sch->dev);
+ struct chsc_request *request = private->request;
+ struct irb *irb = this_cpu_ptr(&cio_irb);
+
+ CHSC_LOG(4, "irb");
+ CHSC_LOG_HEX(4, irb, sizeof(*irb));
+ inc_irq_stat(IRQIO_CSC);
+
+ /* Copy irb to provided request and set done. */
+ if (!request) {
+ CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n",
+ sch->schid.ssid, sch->schid.sch_no);
+ return;
+ }
+ private->request = NULL;
+ memcpy(&request->irb, irb, sizeof(*irb));
+ cio_update_schib(sch);
+ complete(&request->completion);
+ put_device(&sch->dev);
+}
+
+static int chsc_subchannel_probe(struct subchannel *sch)
+{
+ struct chsc_private *private;
+ int ret;
+
+ CHSC_MSG(6, "Detected chsc subchannel 0.%x.%04x\n",
+ sch->schid.ssid, sch->schid.sch_no);
+ sch->isc = CHSC_SCH_ISC;
+ private = kzalloc(sizeof(*private), GFP_KERNEL);
+ if (!private)
+ return -ENOMEM;
+ dev_set_drvdata(&sch->dev, private);
+ ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch);
+ if (ret) {
+ CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n",
+ sch->schid.ssid, sch->schid.sch_no, ret);
+ dev_set_drvdata(&sch->dev, NULL);
+ kfree(private);
+ } else {
+ if (dev_get_uevent_suppress(&sch->dev)) {
+ dev_set_uevent_suppress(&sch->dev, 0);
+ kobject_uevent(&sch->dev.kobj, KOBJ_ADD);
+ }
+ }
+ return ret;
+}
+
+static int chsc_subchannel_remove(struct subchannel *sch)
+{
+ struct chsc_private *private;
+
+ cio_disable_subchannel(sch);
+ private = dev_get_drvdata(&sch->dev);
+ dev_set_drvdata(&sch->dev, NULL);
+ if (private->request) {
+ complete(&private->request->completion);
+ put_device(&sch->dev);
+ }
+ kfree(private);
+ return 0;
+}
+
+static void chsc_subchannel_shutdown(struct subchannel *sch)
+{
+ cio_disable_subchannel(sch);
+}
+
+static int chsc_subchannel_prepare(struct subchannel *sch)
+{
+ int cc;
+ struct schib schib;
+ /*
+ * Don't allow suspend while the subchannel is not idle
+ * since we don't have a way to clear the subchannel and
+ * cannot disable it with a request running.
+ */
+ cc = stsch_err(sch->schid, &schib);
+ if (!cc && scsw_stctl(&schib.scsw))
+ return -EAGAIN;
+ return 0;
+}
+
+static int chsc_subchannel_freeze(struct subchannel *sch)
+{
+ return cio_disable_subchannel(sch);
+}
+
+static int chsc_subchannel_restore(struct subchannel *sch)
+{
+ return cio_enable_subchannel(sch, (u32)(unsigned long)sch);
+}
+
+static struct css_device_id chsc_subchannel_ids[] = {
+ { .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, },
+ { /* end of list */ },
+};
+MODULE_DEVICE_TABLE(css, chsc_subchannel_ids);
+
+static struct css_driver chsc_subchannel_driver = {
+ .drv = {
+ .owner = THIS_MODULE,
+ .name = "chsc_subchannel",
+ },
+ .subchannel_type = chsc_subchannel_ids,
+ .irq = chsc_subchannel_irq,
+ .probe = chsc_subchannel_probe,
+ .remove = chsc_subchannel_remove,
+ .shutdown = chsc_subchannel_shutdown,
+ .prepare = chsc_subchannel_prepare,
+ .freeze = chsc_subchannel_freeze,
+ .thaw = chsc_subchannel_restore,
+ .restore = chsc_subchannel_restore,
+};
+
+static int __init chsc_init_dbfs(void)
+{
+ chsc_debug_msg_id = debug_register("chsc_msg", 8, 1, 4 * sizeof(long));
+ if (!chsc_debug_msg_id)
+ goto out;
+ debug_register_view(chsc_debug_msg_id, &debug_sprintf_view);
+ debug_set_level(chsc_debug_msg_id, 2);
+ chsc_debug_log_id = debug_register("chsc_log", 16, 1, 16);
+ if (!chsc_debug_log_id)
+ goto out;
+ debug_register_view(chsc_debug_log_id, &debug_hex_ascii_view);
+ debug_set_level(chsc_debug_log_id, 2);
+ return 0;
+out:
+ if (chsc_debug_msg_id)
+ debug_unregister(chsc_debug_msg_id);
+ return -ENOMEM;
+}
+
+static void chsc_remove_dbfs(void)
+{
+ debug_unregister(chsc_debug_log_id);
+ debug_unregister(chsc_debug_msg_id);
+}
+
+static int __init chsc_init_sch_driver(void)
+{
+ return css_driver_register(&chsc_subchannel_driver);
+}
+
+static void chsc_cleanup_sch_driver(void)
+{
+ css_driver_unregister(&chsc_subchannel_driver);
+}
+
+static DEFINE_SPINLOCK(chsc_lock);
+
+static int chsc_subchannel_match_next_free(struct device *dev, void *data)
+{
+ struct subchannel *sch = to_subchannel(dev);
+
+ return sch->schib.pmcw.ena && !scsw_fctl(&sch->schib.scsw);
+}
+
+static struct subchannel *chsc_get_next_subchannel(struct subchannel *sch)
+{
+ struct device *dev;
+
+ dev = driver_find_device(&chsc_subchannel_driver.drv,
+ sch ? &sch->dev : NULL, NULL,
+ chsc_subchannel_match_next_free);
+ return dev ? to_subchannel(dev) : NULL;
+}
+
+/**
+ * chsc_async() - try to start a chsc request asynchronously
+ * @chsc_area: request to be started
+ * @request: request structure to associate
+ *
+ * Tries to start a chsc request on one of the existing chsc subchannels.
+ * Returns:
+ * %0 if the request was performed synchronously
+ * %-EINPROGRESS if the request was successfully started
+ * %-EBUSY if all chsc subchannels are busy
+ * %-ENODEV if no chsc subchannels are available
+ * Context:
+ * interrupts disabled, chsc_lock held
+ */
+static int chsc_async(struct chsc_async_area *chsc_area,
+ struct chsc_request *request)
+{
+ int cc;
+ struct chsc_private *private;
+ struct subchannel *sch = NULL;
+ int ret = -ENODEV;
+ char dbf[10];
+
+ chsc_area->header.key = PAGE_DEFAULT_KEY >> 4;
+ while ((sch = chsc_get_next_subchannel(sch))) {
+ spin_lock(sch->lock);
+ private = dev_get_drvdata(&sch->dev);
+ if (private->request) {
+ spin_unlock(sch->lock);
+ ret = -EBUSY;
+ continue;
+ }
+ chsc_area->header.sid = sch->schid;
+ CHSC_LOG(2, "schid");
+ CHSC_LOG_HEX(2, &sch->schid, sizeof(sch->schid));
+ cc = chsc(chsc_area);
+ snprintf(dbf, sizeof(dbf), "cc:%d", cc);
+ CHSC_LOG(2, dbf);
+ switch (cc) {
+ case 0:
+ ret = 0;
+ break;
+ case 1:
+ sch->schib.scsw.cmd.fctl |= SCSW_FCTL_START_FUNC;
+ ret = -EINPROGRESS;
+ private->request = request;
+ break;
+ case 2:
+ ret = -EBUSY;
+ break;
+ default:
+ ret = -ENODEV;
+ }
+ spin_unlock(sch->lock);
+ CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n",
+ sch->schid.ssid, sch->schid.sch_no, cc);
+ if (ret == -EINPROGRESS)
+ return -EINPROGRESS;
+ put_device(&sch->dev);
+ if (ret == 0)
+ return 0;
+ }
+ return ret;
+}
+
+static void chsc_log_command(void *chsc_area)
+{
+ char dbf[10];
+
+ snprintf(dbf, sizeof(dbf), "CHSC:%x", ((uint16_t *)chsc_area)[1]);
+ CHSC_LOG(0, dbf);
+ CHSC_LOG_HEX(0, chsc_area, 32);
+}
+
+static int chsc_examine_irb(struct chsc_request *request)
+{
+ int backed_up;
+
+ if (!(scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND))
+ return -EIO;
+ backed_up = scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHAIN_CHECK;
+ request->irb.scsw.cmd.cstat &= ~SCHN_STAT_CHAIN_CHECK;
+ if (scsw_cstat(&request->irb.scsw) == 0)
+ return 0;
+ if (!backed_up)
+ return 0;
+ if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROG_CHECK)
+ return -EIO;
+ if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROT_CHECK)
+ return -EPERM;
+ if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_DATA_CHK)
+ return -EAGAIN;
+ if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_CTRL_CHK)
+ return -EAGAIN;
+ return -EIO;
+}
+
+static int chsc_ioctl_start(void __user *user_area)
+{
+ struct chsc_request *request;
+ struct chsc_async_area *chsc_area;
+ int ret;
+ char dbf[10];
+
+ if (!css_general_characteristics.dynio)
+ /* It makes no sense to try. */
+ return -EOPNOTSUPP;
+ chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL);
+ if (!chsc_area)
+ return -ENOMEM;
+ request = kzalloc(sizeof(*request), GFP_KERNEL);
+ if (!request) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ init_completion(&request->completion);
+ if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) {
+ ret = -EFAULT;
+ goto out_free;
+ }
+ chsc_log_command(chsc_area);
+ spin_lock_irq(&chsc_lock);
+ ret = chsc_async(chsc_area, request);
+ spin_unlock_irq(&chsc_lock);
+ if (ret == -EINPROGRESS) {
+ wait_for_completion(&request->completion);
+ ret = chsc_examine_irb(request);
+ }
+ /* copy area back to user */
+ if (!ret)
+ if (copy_to_user(user_area, chsc_area, PAGE_SIZE))
+ ret = -EFAULT;
+out_free:
+ snprintf(dbf, sizeof(dbf), "ret:%d", ret);
+ CHSC_LOG(0, dbf);
+ kfree(request);
+ free_page((unsigned long)chsc_area);
+ return ret;
+}
+
+static int chsc_ioctl_on_close_set(void __user *user_area)
+{
+ char dbf[13];
+ int ret;
+
+ mutex_lock(&on_close_mutex);
+ if (on_close_chsc_area) {
+ ret = -EBUSY;
+ goto out_unlock;
+ }
+ on_close_request = kzalloc(sizeof(*on_close_request), GFP_KERNEL);
+ if (!on_close_request) {
+ ret = -ENOMEM;
+ goto out_unlock;
+ }
+ on_close_chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL);
+ if (!on_close_chsc_area) {
+ ret = -ENOMEM;
+ goto out_free_request;
+ }
+ if (copy_from_user(on_close_chsc_area, user_area, PAGE_SIZE)) {
+ ret = -EFAULT;
+ goto out_free_chsc;
+ }
+ ret = 0;
+ goto out_unlock;
+
+out_free_chsc:
+ free_page((unsigned long)on_close_chsc_area);
+ on_close_chsc_area = NULL;
+out_free_request:
+ kfree(on_close_request);
+ on_close_request = NULL;
+out_unlock:
+ mutex_unlock(&on_close_mutex);
+ snprintf(dbf, sizeof(dbf), "ocsret:%d", ret);
+ CHSC_LOG(0, dbf);
+ return ret;
+}
+
+static int chsc_ioctl_on_close_remove(void)
+{
+ char dbf[13];
+ int ret;
+
+ mutex_lock(&on_close_mutex);
+ if (!on_close_chsc_area) {
+ ret = -ENOENT;
+ goto out_unlock;
+ }
+ free_page((unsigned long)on_close_chsc_area);
+ on_close_chsc_area = NULL;
+ kfree(on_close_request);
+ on_close_request = NULL;
+ ret = 0;
+out_unlock:
+ mutex_unlock(&on_close_mutex);
+ snprintf(dbf, sizeof(dbf), "ocrret:%d", ret);
+ CHSC_LOG(0, dbf);
+ return ret;
+}
+
+static int chsc_ioctl_start_sync(void __user *user_area)
+{
+ struct chsc_sync_area *chsc_area;
+ int ret, ccode;
+
+ chsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!chsc_area)
+ return -ENOMEM;
+ if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) {
+ ret = -EFAULT;
+ goto out_free;
+ }
+ if (chsc_area->header.code & 0x4000) {
+ ret = -EINVAL;
+ goto out_free;
+ }
+ chsc_log_command(chsc_area);
+ ccode = chsc(chsc_area);
+ if (ccode != 0) {
+ ret = -EIO;
+ goto out_free;
+ }
+ if (copy_to_user(user_area, chsc_area, PAGE_SIZE))
+ ret = -EFAULT;
+ else
+ ret = 0;
+out_free:
+ free_page((unsigned long)chsc_area);
+ return ret;
+}
+
+static int chsc_ioctl_info_channel_path(void __user *user_cd)
+{
+ struct chsc_chp_cd *cd;
+ int ret, ccode;
+ struct {
+ struct chsc_header request;
+ u32 : 2;
+ u32 m : 1;
+ u32 : 1;
+ u32 fmt1 : 4;
+ u32 cssid : 8;
+ u32 : 8;
+ u32 first_chpid : 8;
+ u32 : 24;
+ u32 last_chpid : 8;
+ u32 : 32;
+ struct chsc_header response;
+ u8 data[PAGE_SIZE - 20];
+ } __attribute__ ((packed)) *scpcd_area;
+
+ scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!scpcd_area)
+ return -ENOMEM;
+ cd = kzalloc(sizeof(*cd), GFP_KERNEL);
+ if (!cd) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ if (copy_from_user(cd, user_cd, sizeof(*cd))) {
+ ret = -EFAULT;
+ goto out_free;
+ }
+ scpcd_area->request.length = 0x0010;
+ scpcd_area->request.code = 0x0028;
+ scpcd_area->m = cd->m;
+ scpcd_area->fmt1 = cd->fmt;
+ scpcd_area->cssid = cd->chpid.cssid;
+ scpcd_area->first_chpid = cd->chpid.id;
+ scpcd_area->last_chpid = cd->chpid.id;
+
+ ccode = chsc(scpcd_area);
+ if (ccode != 0) {
+ ret = -EIO;
+ goto out_free;
+ }
+ if (scpcd_area->response.code != 0x0001) {
+ ret = -EIO;
+ CHSC_MSG(0, "scpcd: response code=%x\n",
+ scpcd_area->response.code);
+ goto out_free;
+ }
+ memcpy(&cd->cpcb, &scpcd_area->response, scpcd_area->response.length);
+ if (copy_to_user(user_cd, cd, sizeof(*cd)))
+ ret = -EFAULT;
+ else
+ ret = 0;
+out_free:
+ kfree(cd);
+ free_page((unsigned long)scpcd_area);
+ return ret;
+}
+
+static int chsc_ioctl_info_cu(void __user *user_cd)
+{
+ struct chsc_cu_cd *cd;
+ int ret, ccode;
+ struct {
+ struct chsc_header request;
+ u32 : 2;
+ u32 m : 1;
+ u32 : 1;
+ u32 fmt1 : 4;
+ u32 cssid : 8;
+ u32 : 8;
+ u32 first_cun : 8;
+ u32 : 24;
+ u32 last_cun : 8;
+ u32 : 32;
+ struct chsc_header response;
+ u8 data[PAGE_SIZE - 20];
+ } __attribute__ ((packed)) *scucd_area;
+
+ scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!scucd_area)
+ return -ENOMEM;
+ cd = kzalloc(sizeof(*cd), GFP_KERNEL);
+ if (!cd) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ if (copy_from_user(cd, user_cd, sizeof(*cd))) {
+ ret = -EFAULT;
+ goto out_free;
+ }
+ scucd_area->request.length = 0x0010;
+ scucd_area->request.code = 0x0028;
+ scucd_area->m = cd->m;
+ scucd_area->fmt1 = cd->fmt;
+ scucd_area->cssid = cd->cssid;
+ scucd_area->first_cun = cd->cun;
+ scucd_area->last_cun = cd->cun;
+
+ ccode = chsc(scucd_area);
+ if (ccode != 0) {
+ ret = -EIO;
+ goto out_free;
+ }
+ if (scucd_area->response.code != 0x0001) {
+ ret = -EIO;
+ CHSC_MSG(0, "scucd: response code=%x\n",
+ scucd_area->response.code);
+ goto out_free;
+ }
+ memcpy(&cd->cucb, &scucd_area->response, scucd_area->response.length);
+ if (copy_to_user(user_cd, cd, sizeof(*cd)))
+ ret = -EFAULT;
+ else
+ ret = 0;
+out_free:
+ kfree(cd);
+ free_page((unsigned long)scucd_area);
+ return ret;
+}
+
+static int chsc_ioctl_info_sch_cu(void __user *user_cud)
+{
+ struct chsc_sch_cud *cud;
+ int ret, ccode;
+ struct {
+ struct chsc_header request;
+ u32 : 2;
+ u32 m : 1;
+ u32 : 5;
+ u32 fmt1 : 4;
+ u32 : 2;
+ u32 ssid : 2;
+ u32 first_sch : 16;
+ u32 : 8;
+ u32 cssid : 8;
+ u32 last_sch : 16;
+ u32 : 32;
+ struct chsc_header response;
+ u8 data[PAGE_SIZE - 20];
+ } __attribute__ ((packed)) *sscud_area;
+
+ sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!sscud_area)
+ return -ENOMEM;
+ cud = kzalloc(sizeof(*cud), GFP_KERNEL);
+ if (!cud) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ if (copy_from_user(cud, user_cud, sizeof(*cud))) {
+ ret = -EFAULT;
+ goto out_free;
+ }
+ sscud_area->request.length = 0x0010;
+ sscud_area->request.code = 0x0006;
+ sscud_area->m = cud->schid.m;
+ sscud_area->fmt1 = cud->fmt;
+ sscud_area->ssid = cud->schid.ssid;
+ sscud_area->first_sch = cud->schid.sch_no;
+ sscud_area->cssid = cud->schid.cssid;
+ sscud_area->last_sch = cud->schid.sch_no;
+
+ ccode = chsc(sscud_area);
+ if (ccode != 0) {
+ ret = -EIO;
+ goto out_free;
+ }
+ if (sscud_area->response.code != 0x0001) {
+ ret = -EIO;
+ CHSC_MSG(0, "sscud: response code=%x\n",
+ sscud_area->response.code);
+ goto out_free;
+ }
+ memcpy(&cud->scub, &sscud_area->response, sscud_area->response.length);
+ if (copy_to_user(user_cud, cud, sizeof(*cud)))
+ ret = -EFAULT;
+ else
+ ret = 0;
+out_free:
+ kfree(cud);
+ free_page((unsigned long)sscud_area);
+ return ret;
+}
+
+static int chsc_ioctl_conf_info(void __user *user_ci)
+{
+ struct chsc_conf_info *ci;
+ int ret, ccode;
+ struct {
+ struct chsc_header request;
+ u32 : 2;
+ u32 m : 1;
+ u32 : 1;
+ u32 fmt1 : 4;
+ u32 cssid : 8;
+ u32 : 6;
+ u32 ssid : 2;
+ u32 : 8;
+ u64 : 64;
+ struct chsc_header response;
+ u8 data[PAGE_SIZE - 20];
+ } __attribute__ ((packed)) *sci_area;
+
+ sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!sci_area)
+ return -ENOMEM;
+ ci = kzalloc(sizeof(*ci), GFP_KERNEL);
+ if (!ci) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ if (copy_from_user(ci, user_ci, sizeof(*ci))) {
+ ret = -EFAULT;
+ goto out_free;
+ }
+ sci_area->request.length = 0x0010;
+ sci_area->request.code = 0x0012;
+ sci_area->m = ci->id.m;
+ sci_area->fmt1 = ci->fmt;
+ sci_area->cssid = ci->id.cssid;
+ sci_area->ssid = ci->id.ssid;
+
+ ccode = chsc(sci_area);
+ if (ccode != 0) {
+ ret = -EIO;
+ goto out_free;
+ }
+ if (sci_area->response.code != 0x0001) {
+ ret = -EIO;
+ CHSC_MSG(0, "sci: response code=%x\n",
+ sci_area->response.code);
+ goto out_free;
+ }
+ memcpy(&ci->scid, &sci_area->response, sci_area->response.length);
+ if (copy_to_user(user_ci, ci, sizeof(*ci)))
+ ret = -EFAULT;
+ else
+ ret = 0;
+out_free:
+ kfree(ci);
+ free_page((unsigned long)sci_area);
+ return ret;
+}
+
+static int chsc_ioctl_conf_comp_list(void __user *user_ccl)
+{
+ struct chsc_comp_list *ccl;
+ int ret, ccode;
+ struct {
+ struct chsc_header request;
+ u32 ctype : 8;
+ u32 : 4;
+ u32 fmt : 4;
+ u32 : 16;
+ u64 : 64;
+ u32 list_parm[2];
+ u64 : 64;
+ struct chsc_header response;
+ u8 data[PAGE_SIZE - 36];
+ } __attribute__ ((packed)) *sccl_area;
+ struct {
+ u32 m : 1;
+ u32 : 31;
+ u32 cssid : 8;
+ u32 : 16;
+ u32 chpid : 8;
+ } __attribute__ ((packed)) *chpid_parm;
+ struct {
+ u32 f_cssid : 8;
+ u32 l_cssid : 8;
+ u32 : 16;
+ u32 res;
+ } __attribute__ ((packed)) *cssids_parm;
+
+ sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!sccl_area)
+ return -ENOMEM;
+ ccl = kzalloc(sizeof(*ccl), GFP_KERNEL);
+ if (!ccl) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ if (copy_from_user(ccl, user_ccl, sizeof(*ccl))) {
+ ret = -EFAULT;
+ goto out_free;
+ }
+ sccl_area->request.length = 0x0020;
+ sccl_area->request.code = 0x0030;
+ sccl_area->fmt = ccl->req.fmt;
+ sccl_area->ctype = ccl->req.ctype;
+ switch (sccl_area->ctype) {
+ case CCL_CU_ON_CHP:
+ case CCL_IOP_CHP:
+ chpid_parm = (void *)&sccl_area->list_parm;
+ chpid_parm->m = ccl->req.chpid.m;
+ chpid_parm->cssid = ccl->req.chpid.chp.cssid;
+ chpid_parm->chpid = ccl->req.chpid.chp.id;
+ break;
+ case CCL_CSS_IMG:
+ case CCL_CSS_IMG_CONF_CHAR:
+ cssids_parm = (void *)&sccl_area->list_parm;
+ cssids_parm->f_cssid = ccl->req.cssids.f_cssid;
+ cssids_parm->l_cssid = ccl->req.cssids.l_cssid;
+ break;
+ }
+ ccode = chsc(sccl_area);
+ if (ccode != 0) {
+ ret = -EIO;
+ goto out_free;
+ }
+ if (sccl_area->response.code != 0x0001) {
+ ret = -EIO;
+ CHSC_MSG(0, "sccl: response code=%x\n",
+ sccl_area->response.code);
+ goto out_free;
+ }
+ memcpy(&ccl->sccl, &sccl_area->response, sccl_area->response.length);
+ if (copy_to_user(user_ccl, ccl, sizeof(*ccl)))
+ ret = -EFAULT;
+ else
+ ret = 0;
+out_free:
+ kfree(ccl);
+ free_page((unsigned long)sccl_area);
+ return ret;
+}
+
+static int chsc_ioctl_chpd(void __user *user_chpd)
+{
+ struct chsc_scpd *scpd_area;
+ struct chsc_cpd_info *chpd;
+ int ret;
+
+ chpd = kzalloc(sizeof(*chpd), GFP_KERNEL);
+ scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!scpd_area || !chpd) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ if (copy_from_user(chpd, user_chpd, sizeof(*chpd))) {
+ ret = -EFAULT;
+ goto out_free;
+ }
+ ret = chsc_determine_channel_path_desc(chpd->chpid, chpd->fmt,
+ chpd->rfmt, chpd->c, chpd->m,
+ scpd_area);
+ if (ret)
+ goto out_free;
+ memcpy(&chpd->chpdb, &scpd_area->response, scpd_area->response.length);
+ if (copy_to_user(user_chpd, chpd, sizeof(*chpd)))
+ ret = -EFAULT;
+out_free:
+ kfree(chpd);
+ free_page((unsigned long)scpd_area);
+ return ret;
+}
+
+static int chsc_ioctl_dcal(void __user *user_dcal)
+{
+ struct chsc_dcal *dcal;
+ int ret, ccode;
+ struct {
+ struct chsc_header request;
+ u32 atype : 8;
+ u32 : 4;
+ u32 fmt : 4;
+ u32 : 16;
+ u32 res0[2];
+ u32 list_parm[2];
+ u32 res1[2];
+ struct chsc_header response;
+ u8 data[PAGE_SIZE - 36];
+ } __attribute__ ((packed)) *sdcal_area;
+
+ sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ if (!sdcal_area)
+ return -ENOMEM;
+ dcal = kzalloc(sizeof(*dcal), GFP_KERNEL);
+ if (!dcal) {
+ ret = -ENOMEM;
+ goto out_free;
+ }
+ if (copy_from_user(dcal, user_dcal, sizeof(*dcal))) {
+ ret = -EFAULT;
+ goto out_free;
+ }
+ sdcal_area->request.length = 0x0020;
+ sdcal_area->request.code = 0x0034;
+ sdcal_area->atype = dcal->req.atype;
+ sdcal_area->fmt = dcal->req.fmt;
+ memcpy(&sdcal_area->list_parm, &dcal->req.list_parm,
+ sizeof(sdcal_area->list_parm));
+
+ ccode = chsc(sdcal_area);
+ if (ccode != 0) {
+ ret = -EIO;
+ goto out_free;
+ }
+ if (sdcal_area->response.code != 0x0001) {
+ ret = -EIO;
+ CHSC_MSG(0, "sdcal: response code=%x\n",
+ sdcal_area->response.code);
+ goto out_free;
+ }
+ memcpy(&dcal->sdcal, &sdcal_area->response,
+ sdcal_area->response.length);
+ if (copy_to_user(user_dcal, dcal, sizeof(*dcal)))
+ ret = -EFAULT;
+ else
+ ret = 0;
+out_free:
+ kfree(dcal);
+ free_page((unsigned long)sdcal_area);
+ return ret;
+}
+
+static long chsc_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
+{
+ void __user *argp;
+
+ CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd);
+ if (is_compat_task())
+ argp = compat_ptr(arg);
+ else
+ argp = (void __user *)arg;
+ switch (cmd) {
+ case CHSC_START:
+ return chsc_ioctl_start(argp);
+ case CHSC_START_SYNC:
+ return chsc_ioctl_start_sync(argp);
+ case CHSC_INFO_CHANNEL_PATH:
+ return chsc_ioctl_info_channel_path(argp);
+ case CHSC_INFO_CU:
+ return chsc_ioctl_info_cu(argp);
+ case CHSC_INFO_SCH_CU:
+ return chsc_ioctl_info_sch_cu(argp);
+ case CHSC_INFO_CI:
+ return chsc_ioctl_conf_info(argp);
+ case CHSC_INFO_CCL:
+ return chsc_ioctl_conf_comp_list(argp);
+ case CHSC_INFO_CPD:
+ return chsc_ioctl_chpd(argp);
+ case CHSC_INFO_DCAL:
+ return chsc_ioctl_dcal(argp);
+ case CHSC_ON_CLOSE_SET:
+ return chsc_ioctl_on_close_set(argp);
+ case CHSC_ON_CLOSE_REMOVE:
+ return chsc_ioctl_on_close_remove();
+ default: /* unknown ioctl number */
+ return -ENOIOCTLCMD;
+ }
+}
+
+static atomic_t chsc_ready_for_use = ATOMIC_INIT(1);
+
+static int chsc_open(struct inode *inode, struct file *file)
+{
+ if (!atomic_dec_and_test(&chsc_ready_for_use)) {
+ atomic_inc(&chsc_ready_for_use);
+ return -EBUSY;
+ }
+ return nonseekable_open(inode, file);
+}
+
+static int chsc_release(struct inode *inode, struct file *filp)
+{
+ char dbf[13];
+ int ret;
+
+ mutex_lock(&on_close_mutex);
+ if (!on_close_chsc_area)
+ goto out_unlock;
+ init_completion(&on_close_request->completion);
+ CHSC_LOG(0, "on_close");
+ chsc_log_command(on_close_chsc_area);
+ spin_lock_irq(&chsc_lock);
+ ret = chsc_async(on_close_chsc_area, on_close_request);
+ spin_unlock_irq(&chsc_lock);
+ if (ret == -EINPROGRESS) {
+ wait_for_completion(&on_close_request->completion);
+ ret = chsc_examine_irb(on_close_request);
+ }
+ snprintf(dbf, sizeof(dbf), "relret:%d", ret);
+ CHSC_LOG(0, dbf);
+ free_page((unsigned long)on_close_chsc_area);
+ on_close_chsc_area = NULL;
+ kfree(on_close_request);
+ on_close_request = NULL;
+out_unlock:
+ mutex_unlock(&on_close_mutex);
+ atomic_inc(&chsc_ready_for_use);
+ return 0;
+}
+
+static const struct file_operations chsc_fops = {
+ .owner = THIS_MODULE,
+ .open = chsc_open,
+ .release = chsc_release,
+ .unlocked_ioctl = chsc_ioctl,
+ .compat_ioctl = chsc_ioctl,
+ .llseek = no_llseek,
+};
+
+static struct miscdevice chsc_misc_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "chsc",
+ .fops = &chsc_fops,
+};
+
+static int __init chsc_misc_init(void)
+{
+ return misc_register(&chsc_misc_device);
+}
+
+static void chsc_misc_cleanup(void)
+{
+ misc_deregister(&chsc_misc_device);
+}
+
+static int __init chsc_sch_init(void)
+{
+ int ret;
+
+ ret = chsc_init_dbfs();
+ if (ret)
+ return ret;
+ isc_register(CHSC_SCH_ISC);
+ ret = chsc_init_sch_driver();
+ if (ret)
+ goto out_dbf;
+ ret = chsc_misc_init();
+ if (ret)
+ goto out_driver;
+ return ret;
+out_driver:
+ chsc_cleanup_sch_driver();
+out_dbf:
+ isc_unregister(CHSC_SCH_ISC);
+ chsc_remove_dbfs();
+ return ret;
+}
+
+static void __exit chsc_sch_exit(void)
+{
+ chsc_misc_cleanup();
+ chsc_cleanup_sch_driver();
+ isc_unregister(CHSC_SCH_ISC);
+ chsc_remove_dbfs();
+}
+
+module_init(chsc_sch_init);
+module_exit(chsc_sch_exit);
Code Review / kvmfornfv.git / blobdiff