status of megaraid_sas cleanup queue command patch

From: Patro, Sumant
Date: Mon Jan 09 2006 - 13:27:30 EST

Hello All,

Could you please let us know the status of the megaraid_sas
cleanup queue command patch that I submitted?

Thanks,

Sumant Patro


-----Original Message-----
From: Patro, Sumant
Sent: Wednesday, December 21, 2005 11:54 AM
To: Bagalkote, Sreenivas; 'hch@xxxxxx'; 'linux-kernel@xxxxxxxxxxxxxxx';
'linux-scsi@xxxxxxxxxxxxxxx'; 'James.Bottomley@xxxxxxxxxxxx'
Cc: Kolli, Neela; Doelfel, Hardy; Yang, Bo
Subject: [PATCH 1/1] megaraid_sas: cleanup up queuecommand path

Hello All,

This patch (originally submitted by Christoph Hellwig) removes code
duplication in megasas_build_cmd.
It also defines MEGASAS_IOC_FIRMWARE32 to allow 64 bit compiled
applications to work. Patch is made against the latest git snapshot of
scsi-misc-2.6 tree.

Thanks,
Sumant Patro



Signed-off-by: Sumant Patro <Sumant.Patro@xxxxxxxx>

diff -Naur linux2.6.orig/Documentation/scsi/ChangeLog.megaraid_sas
linux2.6/Documentation/scsi/ChangeLog.megaraid_sas
--- linux2.6.orig/Documentation/scsi/ChangeLog.megaraid_sas
1969-12-31 16:00:00.000000000 -0800
+++ linux2.6/Documentation/scsi/ChangeLog.megaraid_sas 2005-12-19
14:37:33.000000000 -0800
@@ -0,0 +1,15 @@
+1 Release Date : Mon Dec 19 14:36:26 PST 2005 - Sumant Patro
<Sumant.Patro@xxxxxxxx>
+2 Current Version : 00.00.02.00-rc4
+3 Older Version : 00.00.02.01
+
+i. Code reorganized to remove code duplication in
megasas_build_cmd.
+
+ "There's a lot of duplicate code megasas_build_cmd. Move that
out of the different codepathes and merge the reminder of
megasas_build_cmd into megasas_queue_command"
+
+ - Christoph Hellwig <hch@xxxxxx>
+
+ii. Defined MEGASAS_IOC_FIRMWARE32 for code paths that handles 32
bit applications in 64 bit systems.
+
+ "MEGASAS_IOC_FIRMWARE can't be redefined if CONFIG_COMPAT is
set, we need to define a MEGASAS_IOC_FIRMWARE32 define so native
binaries continue to work"
+
+ - Christoph Hellwig <hch@xxxxxx>
diff -Naur linux2.6.orig/drivers/scsi/megaraid/megaraid_sas.c
linux2.6/drivers/scsi/megaraid/megaraid_sas.c
--- linux2.6.orig/drivers/scsi/megaraid/megaraid_sas.c 2005-12-15
14:08:21.000000000 -0800
+++ linux2.6/drivers/scsi/megaraid/megaraid_sas.c 2005-12-19
14:36:16.000000000 -0800
@@ -10,7 +10,7 @@
* 2 of the License, or (at your option) any later version.
*
* FILE : megaraid_sas.c
- * Version : v00.00.02.00-rc4
+ * Version : v00.00.02.01
*
* Authors:
* Sreenivas Bagalkote <Sreenivas.Bagalkote@xxxxxxxx>
@@ -557,112 +557,29 @@
}

/**
- * megasas_build_cmd - Prepares a command packet
- * @instance: Adapter soft state
- * @scp: SCSI command
- * @frame_count: [OUT] Number of frames used to prepare this
command
+ * megasas_is_ldio - Checks if the cmd is for logical drive
+ * @scmd: SCSI command
+ *
+ * Called by megasas_queue_command to find out if the command to be
queued
+ * is a logical drive command
*/
-static inline struct megasas_cmd *megasas_build_cmd(struct
megasas_instance
- *instance,
- struct scsi_cmnd
*scp,
- int *frame_count)
+static inline int megasas_is_ldio(struct scsi_cmnd *cmd)
{
- u32 logical_cmd;
- struct megasas_cmd *cmd;
-
- /*
- * Find out if this is logical or physical drive command.
- */
- logical_cmd = MEGASAS_IS_LOGICAL(scp);
-
- /*
- * Logical drive command
- */
- if (logical_cmd) {
-
- if (scp->device->id >= MEGASAS_MAX_LD) {
- scp->result = DID_BAD_TARGET << 16;
- return NULL;
- }
-
- switch (scp->cmnd[0]) {
-
- case READ_10:
- case WRITE_10:
- case READ_12:
- case WRITE_12:
- case READ_6:
- case WRITE_6:
- case READ_16:
- case WRITE_16:
- /*
- * Fail for LUN > 0
- */
- if (scp->device->lun) {
- scp->result = DID_BAD_TARGET << 16;
- return NULL;
- }
-
- cmd = megasas_get_cmd(instance);
-
- if (!cmd) {
- scp->result = DID_IMM_RETRY << 16;
- return NULL;
- }
-
- *frame_count = megasas_build_ldio(instance, scp,
cmd);
-
- if (!(*frame_count)) {
- megasas_return_cmd(instance, cmd);
- return NULL;
- }
-
- return cmd;
-
- default:
- /*
- * Fail for LUN > 0
- */
- if (scp->device->lun) {
- scp->result = DID_BAD_TARGET << 16;
- return NULL;
- }
-
- cmd = megasas_get_cmd(instance);
-
- if (!cmd) {
- scp->result = DID_IMM_RETRY << 16;
- return NULL;
- }
-
- *frame_count = megasas_build_dcdb(instance, scp,
cmd);
-
- if (!(*frame_count)) {
- megasas_return_cmd(instance, cmd);
- return NULL;
- }
-
- return cmd;
- }
- } else {
- cmd = megasas_get_cmd(instance);
-
- if (!cmd) {
- scp->result = DID_IMM_RETRY << 16;
- return NULL;
- }
-
- *frame_count = megasas_build_dcdb(instance, scp, cmd);
-
- if (!(*frame_count)) {
- megasas_return_cmd(instance, cmd);
- return NULL;
- }
-
- return cmd;
+ if (!MEGASAS_IS_LOGICAL(cmd))
+ return 0;
+ switch (cmd->cmnd[0]) {
+ case READ_10:
+ case WRITE_10:
+ case READ_12:
+ case WRITE_12:
+ case READ_6:
+ case WRITE_6:
+ case READ_16:
+ case WRITE_16:
+ return 1;
+ default:
+ return 0;
}
-
- return NULL;
}

/**
@@ -683,13 +600,27 @@
scmd->scsi_done = done;
scmd->result = 0;

- cmd = megasas_build_cmd(instance, scmd, &frame_count);
-
- if (!cmd) {
- done(scmd);
- return 0;
+ if (MEGASAS_IS_LOGICAL(scmd) &&
+ (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) {
+ scmd->result = DID_BAD_TARGET << 16;
+ goto out_done;
}

+ cmd = megasas_get_cmd(instance);
+ if (!cmd)
+ return SCSI_MLQUEUE_HOST_BUSY;
+
+ /*
+ * Logical drive command
+ */
+ if (megasas_is_ldio(scmd))
+ frame_count = megasas_build_ldio(instance, scmd, cmd);
+ else
+ frame_count = megasas_build_dcdb(instance, scmd, cmd);
+
+ if (!frame_count)
+ goto out_return_cmd;
+
cmd->scmd = scmd;
scmd->SCp.ptr = (char *)cmd;
scmd->SCp.sent_command = jiffies;
@@ -705,6 +636,12 @@
&instance->reg_set->inbound_queue_port);

return 0;
+
+ out_return_cmd:
+ megasas_return_cmd(instance, cmd);
+ out_done:
+ done(scmd);
+ return 0;
}

/**
@@ -2680,9 +2617,8 @@
unsigned long arg)
{
switch (cmd) {
- case MEGASAS_IOC_FIRMWARE:{
- return megasas_mgmt_compat_ioctl_fw(file, arg);
- }
+ case MEGASAS_IOC_FIRMWARE32:
+ return megasas_mgmt_compat_ioctl_fw(file, arg);
case MEGASAS_IOC_GET_AEN:
return megasas_mgmt_ioctl_aen(file, arg);
}
diff -Naur linux2.6.orig/drivers/scsi/megaraid/megaraid_sas.h
linux2.6/drivers/scsi/megaraid/megaraid_sas.h
--- linux2.6.orig/drivers/scsi/megaraid/megaraid_sas.h 2005-12-15
14:08:21.000000000 -0800
+++ linux2.6/drivers/scsi/megaraid/megaraid_sas.h 2005-12-19
14:29:32.000000000 -0800
@@ -18,10 +18,9 @@
/**
* MegaRAID SAS Driver meta data
*/
-#define MEGASAS_VERSION
"00.00.02.00-rc4"
-#define MEGASAS_RELDATE "Sep 16, 2005"
-#define MEGASAS_EXT_VERSION "Fri Sep 16 12:37:08 EDT
2005"
-
+#define MEGASAS_VERSION "00.00.02.01"
+#define MEGASAS_RELDATE "Dec 19, 2005"
+#define MEGASAS_EXT_VERSION "Mon Dec 19 14:36:26 PST
2005"
/*
* =====================================
* MegaRAID SAS MFI firmware definitions @@ -1125,11 +1124,10 @@
struct compat_iovec sgl[MAX_IOCTL_SGE]; } __attribute__
((packed));

-#define MEGASAS_IOC_FIRMWARE _IOWR('M', 1, struct
compat_megasas_iocpacket)
-#else
-#define MEGASAS_IOC_FIRMWARE _IOWR('M', 1, struct megasas_iocpacket)
#endif

+#define MEGASAS_IOC_FIRMWARE _IOWR('M', 1, struct megasas_iocpacket)
+#define MEGASAS_IOC_FIRMWARE32 _IOWR('M', 1, struct
compat_megasas_iocpacket)
#define MEGASAS_IOC_GET_AEN _IOW('M', 3, struct megasas_aen)

struct megasas_mgmt_info {

Attachment: patchmega.patch
Description: patchmega.patch