From: Corey Minyard <minyard@acm.org>
To: linux-kernel@vger.kernel.org, akpm@osdl.org
Cc: Matt_Domsch@dell.com
Subject: [PATCH 5/9] ipmi: more dell fixes
Date: Fri, 21 Oct 2005 09:53:40 -0500 [thread overview]
Message-ID: <20051021145340.GE19532@i2.minyard.local> (raw)
Make SMIC driver ignore EVT_AVAIL and SMS_ATN bits in flags register,
as they're used by systems management interrupts, not the host OS.
Make the OEM0 Data Available handler work for pre-IPMI 1.5 systems
from Dell too.
Without these two fixes, PowerEdge 2650 and other similar systems with
SMIC may hang a process (modprobe or anything using /dev/ipmi0).
Signed-off-by: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Corey Minyard <minyard@acm.org>
Index: linux-2.6.14-rc2/drivers/char/ipmi/ipmi_si_intf.c
===================================================================
--- linux-2.6.14-rc2.orig/drivers/char/ipmi/ipmi_si_intf.c
+++ linux-2.6.14-rc2/drivers/char/ipmi/ipmi_si_intf.c
@@ -2052,6 +2052,9 @@ static int oem_data_avail_to_receive_msg
* IPMI Version = 0x51 IPMI 1.5
* Manufacturer ID = A2 02 00 Dell IANA
*
+ * Additionally, PowerEdge systems with IPMI < 1.5 may also assert
+ * OEM0_DATA_AVAIL and needs to be treated as RECEIVE_MSG_AVAIL.
+ *
*/
#define DELL_POWEREDGE_8G_BMC_DEVICE_ID 0x20
#define DELL_POWEREDGE_8G_BMC_DEVICE_REV 0x80
@@ -2061,13 +2064,19 @@ static void setup_dell_poweredge_oem_dat
{
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))
- && (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID)
- && (id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV)
- && (id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION))
- {
- smi_info->oem_data_avail_handler =
- oem_data_avail_to_receive_msg_avail;
+ if (! memcmp(mfr, id->manufacturer_id, sizeof(mfr))) {
+ if (id->device_id == DELL_POWEREDGE_8G_BMC_DEVICE_ID &&
+ id->device_revision == DELL_POWEREDGE_8G_BMC_DEVICE_REV &&
+ id->ipmi_version == DELL_POWEREDGE_8G_BMC_IPMI_VERSION) {
+ smi_info->oem_data_avail_handler =
+ oem_data_avail_to_receive_msg_avail;
+ }
+ else if (ipmi_version_major(id) < 1 ||
+ (ipmi_version_major(id) == 1 &&
+ ipmi_version_minor(id) < 5)) {
+ smi_info->oem_data_avail_handler =
+ oem_data_avail_to_receive_msg_avail;
+ }
}
}
Index: linux-2.6.14-rc2/drivers/char/ipmi/ipmi_smic_sm.c
===================================================================
--- linux-2.6.14-rc2.orig/drivers/char/ipmi/ipmi_smic_sm.c
+++ linux-2.6.14-rc2/drivers/char/ipmi/ipmi_smic_sm.c
@@ -81,6 +81,12 @@ enum smic_states {
/* SMIC Flags Register Bits */
#define SMIC_RX_DATA_READY 0x80
#define SMIC_TX_DATA_READY 0x40
+/*
+ * SMIC_SMI and SMIC_EVM_DATA_AVAIL are only used by
+ * a few systems, and then only by Systems Management
+ * Interrupts, not by the OS. Always ignore these bits.
+ *
+ */
#define SMIC_SMI 0x10
#define SMIC_EVM_DATA_AVAIL 0x08
#define SMIC_SMS_DATA_AVAIL 0x04
@@ -364,8 +370,7 @@ static enum si_sm_result smic_event (str
switch (smic->state) {
case SMIC_IDLE:
/* in IDLE we check for available messages */
- if (flags & (SMIC_SMI |
- SMIC_EVM_DATA_AVAIL | SMIC_SMS_DATA_AVAIL))
+ if (flags & SMIC_SMS_DATA_AVAIL)
{
return SI_SM_ATTN;
}
reply other threads:[~2005-10-21 14:53 UTC|newest]
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