WebSVN – HelenOS – Diff – /branches/dynload/uspace/srv/rd/rd.c

 /*
  * Copyright (c) 2007 Michal Konopa
  * Copyright (c) 2007 Martin Jelen
  * Copyright (c) 2007 Peter Majer
  * Copyright (c) 2007 Jakub Jermar
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
+ *
  * - Redistributions of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
  * - Redistributions in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
  * - The name of the author may not be used to endorse or promote products
  *   derived from this software without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 /** @addtogroup rd
  * @{
  */
 /**
  * @file    rd.c
  * @brief   Initial RAM disk for HelenOS.
  */
 #include <ipc/ipc.h>
 #include <ipc/services.h>
 #include <ipc/ns.h>
 #include <sysinfo.h>
 #include <as.h>
 #include <ddi.h>
 #include <align.h>
 #include <bool.h>
 #include <errno.h>
 #include <async.h>
 #include <align.h>
 #include <async.h>
 #include <futex.h>
+#include <stdio.h>
+#include <ipc/devmap.h>
 #include "rd.h"
+#define NAME "rd"
 /** Pointer to the ramdisk's image. */
 static void *rd_addr;
 /** Size of the ramdisk. */
 static size_t rd_size;
 /**
  * This futex protects the ramdisk's data.
  * If we were to serve multiple requests (read + write or several writes)
  * concurrently (i.e. from two or more threads), each read and write needs to be
  * protected by this futex.
  */
 atomic_t rd_futex = FUTEX_INITIALIZER;
 /** Handle one connection to ramdisk.
+ *
  * @param iid       Hash of the request that opened the connection.
  * @param icall     Call data of the request that opened the connection.
  */
 static void rd_connection(ipc_callid_t iid, ipc_call_t *icall)
+{
     ipc_callid_t callid;
     ipc_call_t call;
     int retval;
     void *fs_va = NULL;
     ipcarg_t offset;
     /*
      * We allocate VA for communication per connection.
      * This allows us to potentionally have more clients and work
      * concurrently.
      */
     fs_va = as_get_mappable_page(ALIGN_UP(BLOCK_SIZE, PAGE_SIZE));
     if (!fs_va) {
         /*
          * Hang up the phone if we cannot proceed any further.
          * This is the answer to the call that opened the connection.
          */
         ipc_answer_0(iid, EHANGUP);
         return;
     } else {
         /*
          * Answer the first IPC_M_CONNECT_ME_TO call.
          * Return supported block size as ARG1.
          */
         ipc_answer_1(iid, EOK, BLOCK_SIZE);
+    }
     /*
      * Now we wait for the client to send us its communication as_area.
      */
     size_t size;
+    int flags;
-    if (ipc_share_out_receive(&callid, &size, NULL)) {
+    if (ipc_share_out_receive(&callid, &size, &flags)) {
         if (size >= BLOCK_SIZE) {
             /*
              * The client sends an as_area that can absorb the whole
              * block.
              */
             (void) ipc_share_out_finalize(callid, fs_va);
         } else {
             /*
              * The client offered as_area too small.
              * Close the connection.
              */
             ipc_answer_0(callid, EHANGUP);
             return;
+        }
     } else {
         /*
          * The client doesn't speak the same protocol.
          * At this point we can't handle protocol variations.
          * Close the connection.
          */
         ipc_answer_0(callid, EHANGUP);
         return;
+    }
     while (1) {
         callid = async_get_call(&call);
         switch (IPC_GET_METHOD(call)) {
         case IPC_M_PHONE_HUNGUP:
             /*
              * The other side has hung up.
              * Answer the message and exit the fibril.
              */
             ipc_answer_0(callid, EOK);
             return;
         case RD_READ_BLOCK:
             offset = IPC_GET_ARG1(call);
             if (offset * BLOCK_SIZE > rd_size - BLOCK_SIZE) {
                 /*
                  * Reading past the end of the device.
                  */
                 retval = ELIMIT;
                 break;
+            }
             futex_down(&rd_futex);
-            memcpy(fs_va, rd_addr + offset, BLOCK_SIZE);
+            memcpy(fs_va, rd_addr + offset * BLOCK_SIZE, BLOCK_SIZE);
             futex_up(&rd_futex);
             retval = EOK;
             break;
         case RD_WRITE_BLOCK:
             offset = IPC_GET_ARG1(call);
             if (offset * BLOCK_SIZE > rd_size - BLOCK_SIZE) {
                 /*
                  * Writing past the end of the device.
                  */
                 retval = ELIMIT;
                 break;
+            }
             futex_up(&rd_futex);
-            memcpy(rd_addr + offset, fs_va, BLOCK_SIZE);
+            memcpy(rd_addr + offset * BLOCK_SIZE, fs_va, BLOCK_SIZE);
             futex_down(&rd_futex);
             retval = EOK;
             break;
         default:
             /*
              * The client doesn't speak the same protocol.
              * Instead of closing the connection, we just ignore
              * the call. This can be useful if the client uses a
              * newer version of the protocol.
              */
             retval = EINVAL;
             break;
+        }
         ipc_answer_0(callid, retval);
+    }
+}
+static int driver_register(char *name)
+{
+    ipcarg_t retval;
+    aid_t req;
+    ipc_call_t answer;
+    int phone;
+    ipcarg_t callback_phonehash;
+    phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_DRIVER, 0);
+    while (phone < 0) {
+        usleep(10000);
+        phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP,
+            DEVMAP_DRIVER, 0);
+    }
+    req = async_send_2(phone, DEVMAP_DRIVER_REGISTER, 0, 0, &answer);
+    retval = ipc_data_write_start(phone, (char *) name, strlen(name) + 1);
+    if (retval != EOK) {
+        async_wait_for(req, NULL);
+        return -1;
+    }
+    async_set_client_connection(rd_connection);
+    ipc_connect_to_me(phone, 0, 0, 0, &callback_phonehash);
+    async_wait_for(req, &retval);
+    return phone;
+}
+static int device_register(int driver_phone, char *name, int *handle)
+{
+    ipcarg_t retval;
+    aid_t req;
+    ipc_call_t answer;
+    req = async_send_2(driver_phone, DEVMAP_DEVICE_REGISTER, 0, 0, &answer);
+    retval = ipc_data_write_start(driver_phone, (char *) name, strlen(name) + 1);
+    if (retval != EOK) {
+        async_wait_for(req, NULL);
+        return retval;
+    }
+    async_wait_for(req, &retval);
+    if (handle != NULL)
+        *handle = -1;
+    if (EOK == retval) {
+        if (NULL != handle)
+            *handle = (int) IPC_GET_ARG1(answer);
+    }
+    return retval;
+}
 /** Prepare the ramdisk image for operation. */
 static bool rd_init(void)
+{
-    int retval, flags;
     rd_size = sysinfo_value("rd.size");
     void *rd_ph_addr = (void *) sysinfo_value("rd.address.physical");
-    if (rd_size == 0)
+    if (rd_size == 0) {
+        printf(NAME ": No RAM disk found\n");
         return false;
+    }
     rd_addr = as_get_mappable_page(rd_size);
-    flags = AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE;
+    int flags = AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE;
-    retval = physmem_map(rd_ph_addr, rd_addr,
+    int retval = physmem_map(rd_ph_addr, rd_addr,
         ALIGN_UP(rd_size, PAGE_SIZE) >> PAGE_WIDTH, flags);
-    if (retval < 0)
+    if (retval < 0) {
+        printf(NAME ": Error mapping RAM disk\n");
         return false;
+    }
+    printf(NAME ": Found RAM disk at %p, %d bytes\n", rd_ph_addr, rd_size);
+    int driver_phone = driver_register(NAME);
+    if (driver_phone < 0) {
+        printf(NAME ": Unable to register driver\n");
+        return false;
+    }
+    int dev_handle;
+    if (EOK != device_register(driver_phone, "initrd", &dev_handle)) {
+        ipc_hangup(driver_phone);
+        printf(NAME ": Unable to register device\n");
+        return false;
+    }
     return true;
+}
 int main(int argc, char **argv)
+{
-    if (rd_init()) {
-        ipcarg_t phonead;
-        async_set_client_connection(rd_connection);
-        /* Register service at nameserver */
+    printf(NAME ": HelenOS RAM disk server\n");
-        if (ipc_connect_to_me(PHONE_NS, SERVICE_RD, 0, 0, &phonead) != 0)
-            return -1;
-        async_manager();
-        /* Never reached */
-        return 0;
-    }
+    if (!rd_init())
-    return -1;
+        return -1;
+    printf(NAME ": Accepting connections\n");
+    async_manager();
+    /* Never reached */
+    return 0;
+}
 /**
  * @}
  */

Subversion Repositories HelenOS

(root)/branches/dynload/uspace/srv/rd/rd.c – Rev 2927 → 3150