Changeset f278930 in mainline for uspace/drv/bus/isa/isa.c

Timestamp:

2011-09-03T12:02:08Z (13 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

7fff38c1

Parents:

f480d7e

Message:

ISA bridge remove support.

File:

• uspace/drv/bus/isa/isa.c (modified) (11 diffs)

uspace/drv/bus/isa/isa.c

@@ -37 +37 @@
  */
 
+#include <adt/list.h>
 #include <assert.h>
 #include <stdio.h>
@@ -63 +64 @@
 #define CHILD_FUN_CONF_PATH "/drv/isa/isa.dev"
 
-/** Obtain soft-state pointer from function node pointer */
-#define ISA_FUN(fnode) ((isa_fun_t *) ((fnode)->driver_data))
+/** Obtain soft-state from device node */
+#define ISA_BUS(dev) ((isa_bus_t *) ((dev)->driver_data))
+
+/** Obtain soft-state from function node */
+#define ISA_FUN(fun) ((isa_fun_t *) ((fun)->driver_data))
 
 #define ISA_MAX_HW_RES 4
 
+typedef struct {
+        fibril_mutex_t mutex;
+        ddf_dev_t *dev;
+        ddf_fun_t *fctl;
+        list_t functions;
+} isa_bus_t;
+
 typedef struct isa_fun {
+        fibril_mutex_t mutex;
         ddf_fun_t *fnode;
         hw_resource_list_t hw_resources;
+        link_t bus_link;
 } isa_fun_t;
 
@@ -96 +109 @@
 
 static int isa_add_device(ddf_dev_t *dev);
+static int isa_dev_remove(ddf_dev_t *dev);
 static int isa_fun_online(ddf_fun_t *fun);
 static int isa_fun_offline(ddf_fun_t *fun);
@@ -102 +116 @@
 static driver_ops_t isa_ops = {
         .add_device = &isa_add_device,
+        .dev_remove = &isa_dev_remove,
         .fun_online = &isa_fun_online,
         .fun_offline = &isa_fun_offline
@@ -112 +127 @@
 };
 
-static isa_fun_t *isa_fun_create(ddf_dev_t *dev, const char *name)
-{
-        isa_fun_t *fun = calloc(1, sizeof(isa_fun_t));
+static isa_fun_t *isa_fun_create(isa_bus_t *isa, const char *name)
+{
+        ddf_fun_t *fnode = ddf_fun_create(isa->dev, fun_inner, name);
+        if (fnode == NULL)
+                return NULL;
+
+        isa_fun_t *fun = ddf_fun_data_alloc(fnode, sizeof(isa_fun_t));
         if (fun == NULL)
                 return NULL;
 
-        ddf_fun_t *fnode = ddf_fun_create(dev, fun_inner, name);
-        if (fnode == NULL) {
-                free(fun);
-                return NULL;
-        }
-
+        fibril_mutex_initialize(&fun->mutex);
         fun->fnode = fnode;
-        fnode->driver_data = fun;
         return fun;
 }
@@ -396 +409 @@
 }
 
-static char *isa_fun_read_info(char *fun_conf, ddf_dev_t *dev)
+static void fun_hw_res_free(isa_fun_t *fun)
+{
+        free(fun->hw_resources.resources);
+        fun->hw_resources.resources = NULL;
+}
+
+static char *isa_fun_read_info(char *fun_conf, isa_bus_t *isa)
 {
         char *line;
@@ -419 +438 @@
                 return NULL;
 
-        isa_fun_t *fun = isa_fun_create(dev, fun_name);
+        isa_fun_t *fun = isa_fun_create(isa, fun_name);
         if (fun == NULL) {
                 free(fun_name);
@@ -452 +471 @@
         (void) ddf_fun_bind(fun->fnode);
 
+        list_append(&fun->bus_link, &isa->functions);
+
         return fun_conf;
 }
 
-static void fun_conf_parse(char *conf, ddf_dev_t *dev)
+static void fun_conf_parse(char *conf, isa_bus_t *isa)
 {
         while (conf != NULL && *conf != '\0') {
-                conf = isa_fun_read_info(conf, dev);
-        }
-}
-
-static void isa_functions_add(ddf_dev_t *dev)
+                conf = isa_fun_read_info(conf, isa);
+        }
+}
+
+static void isa_functions_add(isa_bus_t *isa)
 {
         char *fun_conf;
@@ -468 +489 @@
         fun_conf = fun_conf_read(CHILD_FUN_CONF_PATH);
         if (fun_conf != NULL) {
-                fun_conf_parse(fun_conf, dev);
+                fun_conf_parse(fun_conf, isa);
                 free(fun_conf);
         }
@@ -475 +496 @@
 static int isa_add_device(ddf_dev_t *dev)
 {
+        isa_bus_t *isa;
+
         ddf_msg(LVL_DEBUG, "isa_add_device, device handle = %d",
             (int) dev->handle);
 
+        isa = ddf_dev_data_alloc(dev, sizeof(isa_bus_t));
+        if (isa == NULL)
+                return ENOMEM;
+
+        fibril_mutex_initialize(&isa->mutex);
+        isa->dev = dev;
+        list_initialize(&isa->functions);
+
         /* Make the bus device more visible. Does not do anything. */
         ddf_msg(LVL_DEBUG, "Adding a 'ctl' function");
 
-        ddf_fun_t *ctl = ddf_fun_create(dev, fun_exposed, "ctl");
-        if (ctl == NULL) {
+        fibril_mutex_lock(&isa->mutex);
+
+        isa->fctl = ddf_fun_create(dev, fun_exposed, "ctl");
+        if (isa->fctl == NULL) {
                 ddf_msg(LVL_ERROR, "Failed creating control function.");
                 return EXDEV;
         }
 
-        if (ddf_fun_bind(ctl) != EOK) {
+        if (ddf_fun_bind(isa->fctl) != EOK) {
+                ddf_fun_destroy(isa->fctl);
                 ddf_msg(LVL_ERROR, "Failed binding control function.");
                 return EXDEV;
@@ -493 +527 @@
 
         /* Add functions as specified in the configuration file. */
-        isa_functions_add(dev);
+        isa_functions_add(isa);
         ddf_msg(LVL_NOTE, "Finished enumerating legacy functions");
+
+        fibril_mutex_unlock(&isa->mutex);
+
+        return EOK;
+}
+
+static int isa_dev_remove(ddf_dev_t *dev)
+{
+        isa_bus_t *isa = ISA_BUS(dev);
+        int rc;
+
+        fibril_mutex_lock(&isa->mutex);
+
+        while (!list_empty(&isa->functions)) {
+                isa_fun_t *fun = list_get_instance(list_first(&isa->functions),
+                    isa_fun_t, bus_link);
+
+                rc = ddf_fun_offline(fun->fnode);
+                if (rc != EOK) {
+                        fibril_mutex_unlock(&isa->mutex);
+                        ddf_msg(LVL_ERROR, "Failed offlining %s", fun->fnode->name);
+                        return rc;
+                }
+
+                rc = ddf_fun_unbind(fun->fnode);
+                if (rc != EOK) {
+                        fibril_mutex_unlock(&isa->mutex);
+                        ddf_msg(LVL_ERROR, "Failed unbinding %s", fun->fnode->name);
+                        return rc;
+                }
+
+                list_remove(&fun->bus_link);
+
+                fun_hw_res_free(fun);
+                ddf_fun_destroy(fun->fnode);
+        }
+
+        if (ddf_fun_unbind(isa->fctl) != EOK) {
+                fibril_mutex_unlock(&isa->mutex);
+                ddf_msg(LVL_ERROR, "Failed unbinding control function.");
+                return EXDEV;
+        }
+
+        fibril_mutex_unlock(&isa->mutex);
 
         return EOK;