Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/misc/ibmasm/command.c b/drivers/misc/ibmasm/command.c
new file mode 100644
index 0000000..245b005
--- /dev/null
+++ b/drivers/misc/ibmasm/command.c
@@ -0,0 +1,175 @@
+
+/*
+ * IBM ASM Service Processor Device Driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2004
+ *
+ * Author: Max Asböck <amax@us.ibm.com>
+ *
+ */
+
+#include "ibmasm.h"
+
+static void exec_next_command(struct service_processor *sp);
+static void free_command(struct kobject *kobj);
+
+static struct kobj_type ibmasm_cmd_kobj_type = {
+ .release = free_command,
+};
+
+
+struct command *ibmasm_new_command(size_t buffer_size)
+{
+ struct command *cmd;
+
+ if (buffer_size > IBMASM_CMD_MAX_BUFFER_SIZE)
+ return NULL;
+
+ cmd = kmalloc(sizeof(struct command), GFP_KERNEL);
+ if (cmd == NULL)
+ return NULL;
+
+ memset(cmd, 0, sizeof(*cmd));
+
+ cmd->buffer = kmalloc(buffer_size, GFP_KERNEL);
+ if (cmd->buffer == NULL) {
+ kfree(cmd);
+ return NULL;
+ }
+ memset(cmd->buffer, 0, buffer_size);
+ cmd->buffer_size = buffer_size;
+
+ kobject_init(&cmd->kobj);
+ cmd->kobj.ktype = &ibmasm_cmd_kobj_type;
+
+ cmd->status = IBMASM_CMD_PENDING;
+ init_waitqueue_head(&cmd->wait);
+ INIT_LIST_HEAD(&cmd->queue_node);
+
+ return cmd;
+}
+
+static void free_command(struct kobject *kobj)
+{
+ struct command *cmd = to_command(kobj);
+
+ list_del(&cmd->queue_node);
+ kfree(cmd->buffer);
+ kfree(cmd);
+}
+
+static void enqueue_command(struct service_processor *sp, struct command *cmd)
+{
+ list_add_tail(&cmd->queue_node, &sp->command_queue);
+}
+
+static struct command *dequeue_command(struct service_processor *sp)
+{
+ struct command *cmd;
+ struct list_head *next;
+
+ if (list_empty(&sp->command_queue))
+ return NULL;
+
+ next = sp->command_queue.next;
+ list_del_init(next);
+ cmd = list_entry(next, struct command, queue_node);
+
+ return cmd;
+}
+
+static inline void do_exec_command(struct service_processor *sp)
+{
+ if (ibmasm_send_i2o_message(sp)) {
+ sp->current_command->status = IBMASM_CMD_FAILED;
+ exec_next_command(sp);
+ }
+}
+
+/**
+ * exec_command
+ * send a command to a service processor
+ * Commands are executed sequentially. One command (sp->current_command)
+ * is sent to the service processor. Once the interrupt handler gets a
+ * message of type command_response, the message is copied into
+ * the current commands buffer,
+ */
+void ibmasm_exec_command(struct service_processor *sp, struct command *cmd)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&sp->lock, flags);
+
+ if (!sp->current_command) {
+ command_get(cmd);
+ sp->current_command = cmd;
+ spin_unlock_irqrestore(&sp->lock, flags);
+
+ do_exec_command(sp);
+ } else {
+ enqueue_command(sp, cmd);
+ spin_unlock_irqrestore(&sp->lock, flags);
+ }
+}
+
+static void exec_next_command(struct service_processor *sp)
+{
+ unsigned long flags;
+
+ wake_up(&sp->current_command->wait);
+ command_put(sp->current_command);
+
+ spin_lock_irqsave(&sp->lock, flags);
+ sp->current_command = dequeue_command(sp);
+ if (sp->current_command) {
+ command_get(sp->current_command);
+ spin_unlock_irqrestore(&sp->lock, flags);
+ do_exec_command(sp);
+ } else {
+ spin_unlock_irqrestore(&sp->lock, flags);
+ }
+}
+
+/**
+ * Sleep until a command has failed or a response has been received
+ * and the command status been updated by the interrupt handler.
+ * (see receive_response).
+ */
+void ibmasm_wait_for_response(struct command *cmd, int timeout)
+{
+ wait_event_interruptible_timeout(cmd->wait,
+ cmd->status == IBMASM_CMD_COMPLETE ||
+ cmd->status == IBMASM_CMD_FAILED,
+ timeout * HZ);
+}
+
+/**
+ * receive_command_response
+ * called by the interrupt handler when a dot command of type command_response
+ * was received.
+ */
+void ibmasm_receive_command_response(struct service_processor *sp, void *response, size_t size)
+{
+ struct command *cmd = sp->current_command;
+
+ if (!sp->current_command)
+ return;
+
+ memcpy(cmd->buffer, response, min(size, cmd->buffer_size));
+ cmd->status = IBMASM_CMD_COMPLETE;
+ exec_next_command(sp);
+}