patch-2.3.40 linux/drivers/ieee1394/hosts.c

• Lines: 345
• Date: Thu Jan 13 16:49:22 2000
• Orig file: v2.3.39/linux/drivers/ieee1394/hosts.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.39/linux/drivers/ieee1394/hosts.c linux/drivers/ieee1394/hosts.c
@@ -0,0 +1,344 @@
+/*
+ * IEEE 1394 for Linux
+ *
+ * Low level (host adapter) management.
+ *
+ * Copyright (C) 1999 Andreas E. Bombe
+ * Copyright (C) 1999 Emanuel Pirker
+ */
+
+#include <linux/config.h>
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/vmalloc.h>
+#include <linux/wait.h>
+
+#include "ieee1394_types.h"
+#include "hosts.h"
+#include "ieee1394_core.h"
+#include "highlevel.h"
+
+
+static struct hpsb_host_template *templates = NULL;
+spinlock_t templates_lock = SPIN_LOCK_UNLOCKED;
+
+
+/*
+ * The following function is exported for module usage.  It will
+ * be called from high-level drivers such as the raw driver.
+ */
+int hpsb_get_host_list(struct hpsb_host *list[], int list_size)
+{
+    struct hpsb_host *host, **ptr;
+    struct hpsb_host_template *tmpl;
+    int count=0;
+
+    ptr = list;
+
+    for (tmpl = templates ; tmpl != NULL; tmpl = tmpl->next) {
+        for (host = tmpl->hosts; (host != NULL) && (count < list_size); 
+             host = host->next) {
+            *ptr = host;
+            ptr++;
+            count++;
+        }
+    }
+
+    return count;
+}
+
+/*
+ * This function calls the add_host/remove_host hooks for every host currently
+ * registered.  Init == TRUE means add_host.
+ */
+void hl_all_hosts(struct hpsb_highlevel *hl, int init)
+{
+        struct hpsb_host_template *tmpl;
+        struct hpsb_host *host;
+
+        spin_lock(&templates_lock);
+
+        for (tmpl = templates; tmpl != NULL; tmpl = tmpl->next) {
+                for (host = tmpl->hosts; host != NULL; host = host->next) {
+                        if (host->initialized) {
+                                if (init) {
+                                        if (hl->op->add_host) {
+                                                hl->op->add_host(host);
+                                        }
+                                } else {
+                                        if (hl->op->remove_host) {
+                                                hl->op->remove_host(host);
+                                        }
+                                }
+                        }
+                }
+        }
+
+        spin_unlock(&templates_lock);
+}
+
+int hpsb_inc_host_usage(struct hpsb_host *host)
+{
+        struct hpsb_host_template *tmpl;
+        struct hpsb_host *h;
+        int retval = 0;
+
+        spin_lock(&templates_lock);
+
+        for (tmpl = templates; (tmpl != NULL) && !retval; tmpl = tmpl->next) {
+                for (h = tmpl->hosts; h != NULL; h = h->next) {
+                        if (h == host) {
+                                tmpl->devctl(h, MODIFY_USAGE, 1);
+                                retval = 1;
+                                break;
+                        }
+                }
+        }
+
+        spin_unlock(&templates_lock);
+
+        return retval;
+}
+
+void hpsb_dec_host_usage(struct hpsb_host *host)
+{
+        host->template->devctl(host, MODIFY_USAGE, 0);
+}
+
+/*
+ * The following function is exported for module usage.  It will be called from
+ * the detect function of a adapter driver.
+ */
+struct hpsb_host *hpsb_get_host(struct hpsb_host_template *tmpl, 
+                                size_t hd_size)
+{
+        struct hpsb_host *h;
+
+        h = vmalloc(sizeof(struct hpsb_host) + hd_size);
+        if (h == NULL) {
+                return NULL;
+        }
+
+        memset(h, 0, sizeof(struct hpsb_host) + hd_size);
+        h->tlabel_count = 64;
+        INIT_LIST_HEAD(&h->pending_packets);
+        spin_lock_init(&h->pending_pkt_lock);
+        spin_lock_init(&h->tlabel_lock);
+        init_waitqueue_head(&h->tlabel_wait);
+
+        h->timeout_tq.routine = (void (*)(void*))abort_timedouts;
+        h->timeout_tq.data = h;
+
+        h->topology_map = h->csr.topology_map + 3;
+        h->speed_map = h->csr.speed_map + 2;
+
+        h->template = tmpl;
+        if (hd_size) {
+                h->hostdata = &h->embedded_hostdata[0];
+        }
+
+        if (tmpl->hosts == NULL) {
+                tmpl->hosts = h;
+        } else {
+                struct hpsb_host *last = tmpl->hosts;
+
+                while (last->next != NULL) {
+                        last = last->next;
+                }
+                last->next = h;
+        }
+
+        return h;
+}
+
+static void free_all_hosts(struct hpsb_host_template *tmpl)
+{
+        struct hpsb_host *next, *host = tmpl->hosts;
+
+        while (host) {
+                next = host->next;
+                vfree(host);
+                host = next;
+        }
+}
+
+
+static void init_hosts(struct hpsb_host_template *tmpl)
+{
+        int count;
+        struct hpsb_host *host;
+
+        count = tmpl->detect_hosts(tmpl);
+
+        for (host = tmpl->hosts; host != NULL; host = host->next) {
+                if (tmpl->initialize_host(host)) {
+                        host->initialized = 1;
+
+                        highlevel_add_host(host);
+                        reset_host_bus(host);
+
+                        //kernel_thread(hpsb_host_thread, host, 
+                        //              CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
+                }
+        }
+
+        tmpl->number_of_hosts = count;
+        HPSB_INFO("detected %d %s adapter%c", count, tmpl->name,
+                  (count != 1 ? 's' : ' '));
+}
+
+static void shutdown_hosts(struct hpsb_host_template *tmpl)
+{
+        struct hpsb_host *host;
+
+        for (host = tmpl->hosts; host != NULL; host = host->next) {
+                if (host->initialized) {
+                        host->initialized = 0;
+                        abort_requests(host);
+
+                        highlevel_remove_host(host);
+
+                        tmpl->release_host(host);
+                        while (test_bit(0, &host->timeout_tq.sync)) {
+                                schedule();
+                        }
+                }
+        }
+        free_all_hosts(tmpl);
+        tmpl->release_host(NULL);
+
+        tmpl->number_of_hosts = 0;
+}
+
+
+static int add_template(struct hpsb_host_template *new)
+{
+        new->next = NULL;
+        new->hosts = NULL;
+        new->number_of_hosts = 0;
+
+        spin_lock(&templates_lock);
+        if (templates == NULL) {
+                templates = new;
+        } else {
+                struct hpsb_host_template *last = templates;
+                while (last->next != NULL) {
+                        last = last->next;
+                }
+                last->next = new;
+        }
+        spin_unlock(&templates_lock);
+
+        return 0;
+}
+
+static int remove_template(struct hpsb_host_template *tmpl)
+{
+        int retval = 0;
+
+        if (tmpl->number_of_hosts) {
+                HPSB_ERR("attempted to remove busy host template "
+                         "of %s at address 0x%p", tmpl->name, tmpl);
+                return 1;
+        }
+
+        spin_lock(&templates_lock);
+        if (templates == tmpl) {
+                templates = tmpl->next;
+        } else {
+                struct hpsb_host_template *t;
+
+                t = templates;
+                while (t->next != tmpl && t->next != NULL) {
+                        t = t->next;
+                }
+
+                if (t->next == NULL) {
+                        HPSB_ERR("attempted to remove unregistered host template "
+                                 "of %s at address 0x%p", tmpl->name, tmpl);
+                        retval = -1;
+                } else {
+                        t->next = tmpl->next;
+                }
+        }
+        spin_unlock(&templates_lock);
+
+        inc_hpsb_generation();
+        return retval;
+}
+
+
+/*
+ * The following two functions are exported symbols for module usage.
+ */
+int hpsb_register_lowlevel(struct hpsb_host_template *tmpl)
+{
+        add_template(tmpl);
+        HPSB_INFO("registered %s driver, initializing now", tmpl->name);
+        init_hosts(tmpl);
+
+        return 0;
+}
+
+void hpsb_unregister_lowlevel(struct hpsb_host_template *tmpl)
+{
+        shutdown_hosts(tmpl);
+
+        if (remove_template(tmpl)) {
+                HPSB_PANIC("remove_template failed on %s", tmpl->name);
+        }
+}
+
+
+
+#ifndef MODULE
+
+/*
+ * This is the init function for builtin lowlevel drivers.  To add new drivers
+ * put their setup code (get and register template) here.  Module only
+ * drivers don't need to touch this.
+ */
+
+#define SETUP_TEMPLATE(name, visname) \
+do {                                                                       \
+        extern struct hpsb_host_template *get_ ## name ## _template(void); \
+        t = get_ ## name ## _template();                                   \
+                                                                           \
+        if (t != NULL) {                                                   \
+                if(!hpsb_register_lowlevel(t)) {                           \
+                        count++;                                           \
+                }                                                          \
+        } else {                                                           \
+                HPSB_WARN(visname " driver returned no host template");    \
+        }                                                                  \
+} while (0)
+
+void __init register_builtin_lowlevels()
+{
+        struct hpsb_host_template *t;
+        int count = 0;
+
+        /* Touch t to avoid warning if no drivers are configured to
+         * be built directly into the kernel. */
+        t = NULL;
+
+#ifdef CONFIG_IEEE1394_PCILYNX
+        SETUP_TEMPLATE(lynx, "Lynx");
+#endif
+
+#ifdef CONFIG_IEEE1394_AIC5800
+        SETUP_TEMPLATE(aic, "AIC-5800");
+#endif
+ 
+#ifdef CONFIG_IEEE1394_OHCI1394
+        SETUP_TEMPLATE(ohci, "OHCI-1394");
+#endif
+
+        HPSB_INFO("%d host adapter%s initialized", count,
+                  (count != 1 ? "s" : ""));
+}
+
+#undef SETUP_TEMPLATE
+
+#endif /* !MODULE */