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-rw-r--r--drivers/char/ipmi/ipmi_si_intf.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index df7dbbf..2ace62b 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -51,6 +51,7 @@
#include <linux/list.h>
#include <linux/pci.h>
#include <linux/ioport.h>
+#include <linux/notifier.h>
#include <asm/irq.h>
#ifdef CONFIG_HIGH_RES_TIMERS
#include <linux/hrtime.h>
@@ -222,6 +223,12 @@ struct smi_info
unsigned long incoming_messages;
};
+static struct notifier_block *xaction_notifier_list;
+static int register_xaction_notifier(struct notifier_block * nb)
+{
+ return notifier_chain_register(&xaction_notifier_list, nb);
+}
+
static void si_restart_short_timer(struct smi_info *smi_info);
static void deliver_recv_msg(struct smi_info *smi_info,
@@ -281,6 +288,11 @@ static enum si_sm_result start_next_msg(struct smi_info *smi_info)
do_gettimeofday(&t);
printk("**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
#endif
+ err = notifier_call_chain(&xaction_notifier_list, 0, smi_info);
+ if (err & NOTIFY_STOP_MASK) {
+ rv = SI_SM_CALL_WITHOUT_DELAY;
+ goto out;
+ }
err = smi_info->handlers->start_transaction(
smi_info->si_sm,
smi_info->curr_msg->data,
@@ -291,6 +303,7 @@ static enum si_sm_result start_next_msg(struct smi_info *smi_info)
rv = SI_SM_CALL_WITHOUT_DELAY;
}
+ out:
spin_unlock(&(smi_info->msg_lock));
return rv;
@@ -2080,6 +2093,71 @@ static void setup_dell_poweredge_oem_data_handler(struct smi_info *smi_info)
}
}
+#define CANNOT_RETURN_REQUESTED_LENGTH 0xCA
+static void return_hosed_msg_badsize(struct smi_info *smi_info)
+{
+ struct ipmi_smi_msg *msg = smi_info->curr_msg;
+
+ /* Make it a reponse */
+ msg->rsp[0] = msg->data[0] | 4;
+ msg->rsp[1] = msg->data[1];
+ msg->rsp[2] = CANNOT_RETURN_REQUESTED_LENGTH;
+ msg->rsp_size = 3;
+ smi_info->curr_msg = NULL;
+ deliver_recv_msg(smi_info, msg);
+}
+
+/*
+ * dell_poweredge_bt_xaction_handler
+ * @info - smi_info.device_id must be populated
+ *
+ * Dell PowerEdge servers with the BT interface (x6xx and 1750) will
+ * not respond to a Get SDR command if the length of the data
+ * requested is exactly 0x3A, which leads to command timeouts and no
+ * data returned. This intercepts such commands, and causes userspace
+ * callers to try again with a different-sized buffer, which succeeds.
+ */
+
+#define STORAGE_NETFN 0x0A
+#define STORAGE_CMD_GET_SDR 0x23
+static int dell_poweredge_bt_xaction_handler(struct notifier_block *self,
+ unsigned long unused,
+ void *in)
+{
+ struct smi_info *smi_info = in;
+ unsigned char *data = smi_info->curr_msg->data;
+ unsigned int size = smi_info->curr_msg->data_size;
+ if (size >= 8 &&
+ (data[0]>>2) == STORAGE_NETFN &&
+ data[1] == STORAGE_CMD_GET_SDR &&
+ data[7] == 0x3A) {
+ return_hosed_msg_badsize(smi_info);
+ return NOTIFY_STOP;
+ }
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block dell_poweredge_bt_xaction_notifier = {
+ .notifier_call = dell_poweredge_bt_xaction_handler,
+};
+
+/*
+ * setup_dell_poweredge_bt_xaction_handler
+ * @info - smi_info.device_id must be filled in already
+ *
+ * Fills in smi_info.device_id.start_transaction_pre_hook
+ * when we know what function to use there.
+ */
+static void
+setup_dell_poweredge_bt_xaction_handler(struct smi_info *smi_info)
+{
+ struct ipmi_device_id *id = &smi_info->device_id;
+ const char mfr[3]=DELL_IANA_MFR_ID;
+ if (! memcmp(mfr, id->manufacturer_id, sizeof(mfr)) &&
+ smi_info->si_type == SI_BT)
+ register_xaction_notifier(&dell_poweredge_bt_xaction_notifier);
+}
+
/*
* setup_oem_data_handler
* @info - smi_info.device_id must be filled in already
@@ -2093,6 +2171,11 @@ static void setup_oem_data_handler(struct smi_info *smi_info)
setup_dell_poweredge_oem_data_handler(smi_info);
}
+static void setup_xaction_handlers(struct smi_info *smi_info)
+{
+ setup_dell_poweredge_bt_xaction_handler(smi_info);
+}
+
/* Returns 0 if initialized, or negative on an error. */
static int init_one_smi(int intf_num, struct smi_info **smi)
{
@@ -2188,6 +2271,7 @@ static int init_one_smi(int intf_num, struct smi_info **smi)
goto out_err;
setup_oem_data_handler(new_smi);
+ setup_xaction_handlers(new_smi);
/* Try to claim any interrupts. */
new_smi->irq_setup(new_smi);
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