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Subject[RFC] [PATCH] 6/7 2.5.35 SCSI multi-path
Patch to add 2.5 and/or multi-path support to the qla v6b5 adapter driver.

Requires the qla source - this is _not_ a patch for the mainline kernel.

Requires the scsi base changes.

Most of this is renaming the makefile, and creating a simple makefile
(thanks mikeand) that can easily be used with kbuild 2.5.

Download the qla v6b5 tar file, untar, create a src dir, untar the qla
source (yes it is a tar file within a tar file) into a directory named
something/src, and apply this patch.

To build as a module, cd to-your-kernel-source-with-mpath-patch and run:

make SUBDIRS=/something/src/


makefile | 151 ++--------------------------------------------------
makefile-orig | 162 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
qla2x00.c | 45 ++++++++++++---
qla2x00_ioctl.c | 7 ++
4 files changed, 210 insertions(+), 155 deletions(-)

diff -urN -X /home/patman/dontdiff src-orig/makefile src/makefile
--- src-orig/makefile Tue Aug 20 02:43:18 2002
+++ src/makefile Thu Sep 12 15:39:54 2002
@@ -1,162 +1,10 @@
-#
-# Makefile 1.5.1 April 30, 2002
-#
-#
-# 1. To make UP version of ISP2200 driver
-# make qla2200.o
-#
-# 2. To make UP version of ISP2300 driver
-# make qla2300.o
-#
-# 3. To make UP version of ISP2200 and ISP2300 drivers
-# make all
-#or
-# make
-#
-# To make SMP version of any of the above drivers
-# append SMP=1 to one of the (3) make command lines above.
-# make ... SMP=1
-#
-# To make a new firmware file (FILE must be a *.c file of the fw object)
-# make fw FILE2=2200tp.c
-#
+# andmike's condensed makefile
+# To use cd to the kernel source and type the following.
+# make SUBDIRS=/path/to/here

-DRIVER=qla2200.o qla2300.o
+CFLAGS_qla2200.o = -I$(TOPDIR)/drivers/scsi
+CFLAGS_qla2300.o = -I$(TOPDIR)/drivers/scsi

-FILE2=2200tp.h
-FILE3=2300tp.h
+obj-m := qla2200.o qla2300.o

-HOSTTYPE := $(shell uname -m)
-
-#
-# f/W include files
-FWFILE2=ql2200_fw.h
-FWFILE3=ql2300_fw.h
-FWFILE2IP=ql2200ip_fw.h
-FWFILE3IP=ql2300ip_fw.h
-
-# Comment/uncomment the following line to enable/disable debugging
-DEBUGFLAG=y
-HSG80=n
-
-QL_DEBUG=0x6
-
-OSVER=linux-2.4
-
-# Change it here or specify it on the "make" commandline
-#(new)INCLUDEDIR = /lib/modules/`uname -r`/build/include
-INCLUDEDIR = /usr/src/$(OSVER)/include
-
-ifeq ($(DEBUGFLAG),y)
- DEBFLAGS = -O -g -DUDEBUG -DLINUX -Dlinux
-else
- DEBFLAGS = -O2 -DLINUX -Dlinux
-endif
-
-CFLAGS = -D__KERNEL__ -DMODULE -Wall $(DEBFLAGS) -DINTAPI -DEXPORT_SYMTAB
-#CFLAGS = -D__KERNEL__ -DMODULE -Wall $(DEBFLAGS) -DEXPORT_SYMTAB
-
-ifeq ($(HSG80),y)
-CFLAGS += -DCOMPAQ
-endif
-
-
-# set MODVERSIONS if the kernel uses it
-VERSUSED = $(shell grep 'define CONFIG_MODVERSIONS' \
- $(INCLUDEDIR)/linux/autoconf.h | wc -l | sed 's/ //g')
-VERSUSED = 1
-
-ifeq ($(VERSUSED),1)
-CFLAGS += -DMODVERSIONS -include $(INCLUDEDIR)/linux/modversions.h
-endif
-
-CFLAGS += -I$(INCLUDEDIR) -I$(INCLUDEDIR)/../drivers/scsi
-
-ifeq ($(HOSTTYPE),i386)
-CFLAGS += -Wall -Wstrict-prototypes -fomit-frame-pointer -fno-strength-reduce \
--pipe -malign-loops=2 -malign-jumps=2 -malign-functions=2 \
--DCONFIG_X86_LOCAL_APIC -fno-strict-aliasing -fno-common \
--mpreferred-stack-boundary=2 -march=i386
-endif
-
-ifeq ($(HOSTTYPE),i486)
-CFLAGS += -Wall -Wstrict-prototypes -fomit-frame-pointer -fno-strength-reduce \
--pipe -malign-loops=2 -malign-jumps=2 -malign-functions=2 \
--DCONFIG_X86_LOCAL_APIC -fno-strict-aliasing -fno-common \
--mpreferred-stack-boundary=2 -march=i486
-endif
-
-ifeq ($(HOSTTYPE),i586)
-CFLAGS += -Wall -Wstrict-prototypes -fomit-frame-pointer -fno-strength-reduce \
--pipe -malign-loops=2 -malign-jumps=2 -malign-functions=2 \
--DCONFIG_X86_LOCAL_APIC -fno-strict-aliasing -fno-common \
--mpreferred-stack-boundary=2 -march=i586
-endif
-
-ifeq ($(HOSTTYPE),i686)
-CFLAGS += -Wall -Wstrict-prototypes -fomit-frame-pointer -fno-strength-reduce \
--pipe -malign-loops=2 -malign-jumps=2 -malign-functions=2 \
--DCONFIG_X86_LOCAL_APIC -fno-strict-aliasing -fno-common \
--mpreferred-stack-boundary=2 -march=i686
-endif
-
-ifeq ($(HOSTTYPE),ia64)
-CFLAGS += -Wall -Wstrict-prototypes -fomit-frame-pointer -fno-strength-reduce \
--pipe -DWORD_FW_LOAD
-endif
-
-ifeq ($(HOSTTYPE),alpha)
-CFLAGS += -D__alpha__ \
--Wall -Wstrict-prototypes -fomit-frame-pointer -fno-strength-reduce \
--pipe -fno-strict-aliasing -mno-fp-regs -ffixed-8 -mcpu=ev56 -Wa,-mev6
-endif
-
-ifeq ("1","$(IP)")
-CFLAGS += -DFC_IP_SUPPORT
-endif
-
-ifeq ("1","$(SMP)")
-CFLAGS += -D__SMP__ -DCONFIG_SMP
-endif
-
-COFLAGS = -kv
-
-MPATH = /lib/modules
-
-SRC_FILES=qla_settings.h qla2x00.h qla2x00.c qla_cfg.c qla_cfg.h qla_cfgln.c \
-qla_fo.h qla_fo.c qlfo.h qla2x00_ioctl.c qla_inioct.c \
-qla_mbx.c qla_mbx.h qla_debug.h qla_version.h makefile qla_ip.c qla_ip.h
-
-#
-# Where is all starts..
-#
-# -- default is always first.
-default: $(DRIVER)
-
-all: $(DRIVER)
-
-clean:
- rm -f $(DRIVER)
-
-install: $(DRIVER)
- REL=`uname -r | \
- sed -e 's/.*\"\(.*\)\".*/\1/'` ; \
- cp -p $(DRIVER) /lib/modules/$$REL/kernel/drivers/scsi
-
-fw:
- mv $(FILE2) $(FWFILE2)
- mv $(FILE3) $(FWFILE3)
-
-qla2100.o : $(SRC_FILES)
- $(CC) $(CFLAGS) -c qla2100.c -o $@
-
-qla2200.o : $(SRC_FILES) $(FWFILE2)
- $(CC) $(CFLAGS) -c qla2200.c -o $@
-
-qla2300.o : $(SRC_FILES) $(FWFILE3)
- $(CC) $(CFLAGS) -c qla2300.c -o $@
-
-# @echo "Editing file to produce -> [isp_fw.h]"
-# sh do_fw.sh $(FILE) cvtfw
-# @echo "Editing file to produce -> [isp1_fw.h]"
-# sh do_fw.sh $(FILE2) cvtfw22
+include $(TOPDIR)/Rules.make
diff -urN -X /home/patman/dontdiff src-orig/makefile-orig src/makefile-orig
--- src-orig/makefile-orig Wed Dec 31 16:00:00 1969
+++ src/makefile-orig Tue Aug 20 02:43:18 2002
@@ -0,0 +1,162 @@
+#
+# Makefile 1.5.1 April 30, 2002
+#
+#
+# 1. To make UP version of ISP2200 driver
+# make qla2200.o
+#
+# 2. To make UP version of ISP2300 driver
+# make qla2300.o
+#
+# 3. To make UP version of ISP2200 and ISP2300 drivers
+# make all
+#or
+# make
+#
+# To make SMP version of any of the above drivers
+# append SMP=1 to one of the (3) make command lines above.
+# make ... SMP=1
+#
+# To make a new firmware file (FILE must be a *.c file of the fw object)
+# make fw FILE2=2200tp.c
+#
+
+DRIVER=qla2200.o qla2300.o
+
+FILE2=2200tp.h
+FILE3=2300tp.h
+
+HOSTTYPE := $(shell uname -m)
+
+#
+# f/W include files
+FWFILE2=ql2200_fw.h
+FWFILE3=ql2300_fw.h
+FWFILE2IP=ql2200ip_fw.h
+FWFILE3IP=ql2300ip_fw.h
+
+# Comment/uncomment the following line to enable/disable debugging
+DEBUGFLAG=y
+HSG80=n
+
+QL_DEBUG=0x6
+
+OSVER=linux-2.4
+
+# Change it here or specify it on the "make" commandline
+#(new)INCLUDEDIR = /lib/modules/`uname -r`/build/include
+INCLUDEDIR = /usr/src/$(OSVER)/include
+
+ifeq ($(DEBUGFLAG),y)
+ DEBFLAGS = -O -g -DUDEBUG -DLINUX -Dlinux
+else
+ DEBFLAGS = -O2 -DLINUX -Dlinux
+endif
+
+CFLAGS = -D__KERNEL__ -DMODULE -Wall $(DEBFLAGS) -DINTAPI -DEXPORT_SYMTAB
+#CFLAGS = -D__KERNEL__ -DMODULE -Wall $(DEBFLAGS) -DEXPORT_SYMTAB
+
+ifeq ($(HSG80),y)
+CFLAGS += -DCOMPAQ
+endif
+
+
+# set MODVERSIONS if the kernel uses it
+VERSUSED = $(shell grep 'define CONFIG_MODVERSIONS' \
+ $(INCLUDEDIR)/linux/autoconf.h | wc -l | sed 's/ //g')
+VERSUSED = 1
+
+ifeq ($(VERSUSED),1)
+CFLAGS += -DMODVERSIONS -include $(INCLUDEDIR)/linux/modversions.h
+endif
+
+CFLAGS += -I$(INCLUDEDIR) -I$(INCLUDEDIR)/../drivers/scsi
+
+ifeq ($(HOSTTYPE),i386)
+CFLAGS += -Wall -Wstrict-prototypes -fomit-frame-pointer -fno-strength-reduce \
+-pipe -malign-loops=2 -malign-jumps=2 -malign-functions=2 \
+-DCONFIG_X86_LOCAL_APIC -fno-strict-aliasing -fno-common \
+-mpreferred-stack-boundary=2 -march=i386
+endif
+
+ifeq ($(HOSTTYPE),i486)
+CFLAGS += -Wall -Wstrict-prototypes -fomit-frame-pointer -fno-strength-reduce \
+-pipe -malign-loops=2 -malign-jumps=2 -malign-functions=2 \
+-DCONFIG_X86_LOCAL_APIC -fno-strict-aliasing -fno-common \
+-mpreferred-stack-boundary=2 -march=i486
+endif
+
+ifeq ($(HOSTTYPE),i586)
+CFLAGS += -Wall -Wstrict-prototypes -fomit-frame-pointer -fno-strength-reduce \
+-pipe -malign-loops=2 -malign-jumps=2 -malign-functions=2 \
+-DCONFIG_X86_LOCAL_APIC -fno-strict-aliasing -fno-common \
+-mpreferred-stack-boundary=2 -march=i586
+endif
+
+ifeq ($(HOSTTYPE),i686)
+CFLAGS += -Wall -Wstrict-prototypes -fomit-frame-pointer -fno-strength-reduce \
+-pipe -malign-loops=2 -malign-jumps=2 -malign-functions=2 \
+-DCONFIG_X86_LOCAL_APIC -fno-strict-aliasing -fno-common \
+-mpreferred-stack-boundary=2 -march=i686
+endif
+
+ifeq ($(HOSTTYPE),ia64)
+CFLAGS += -Wall -Wstrict-prototypes -fomit-frame-pointer -fno-strength-reduce \
+-pipe -DWORD_FW_LOAD
+endif
+
+ifeq ($(HOSTTYPE),alpha)
+CFLAGS += -D__alpha__ \
+-Wall -Wstrict-prototypes -fomit-frame-pointer -fno-strength-reduce \
+-pipe -fno-strict-aliasing -mno-fp-regs -ffixed-8 -mcpu=ev56 -Wa,-mev6
+endif
+
+ifeq ("1","$(IP)")
+CFLAGS += -DFC_IP_SUPPORT
+endif
+
+ifeq ("1","$(SMP)")
+CFLAGS += -D__SMP__ -DCONFIG_SMP
+endif
+
+COFLAGS = -kv
+
+MPATH = /lib/modules
+
+SRC_FILES=qla_settings.h qla2x00.h qla2x00.c qla_cfg.c qla_cfg.h qla_cfgln.c \
+qla_fo.h qla_fo.c qlfo.h qla2x00_ioctl.c qla_inioct.c \
+qla_mbx.c qla_mbx.h qla_debug.h qla_version.h makefile qla_ip.c qla_ip.h
+
+#
+# Where is all starts..
+#
+# -- default is always first.
+default: $(DRIVER)
+
+all: $(DRIVER)
+
+clean:
+ rm -f $(DRIVER)
+
+install: $(DRIVER)
+ REL=`uname -r | \
+ sed -e 's/.*\"\(.*\)\".*/\1/'` ; \
+ cp -p $(DRIVER) /lib/modules/$$REL/kernel/drivers/scsi
+
+fw:
+ mv $(FILE2) $(FWFILE2)
+ mv $(FILE3) $(FWFILE3)
+
+qla2100.o : $(SRC_FILES)
+ $(CC) $(CFLAGS) -c qla2100.c -o $@
+
+qla2200.o : $(SRC_FILES) $(FWFILE2)
+ $(CC) $(CFLAGS) -c qla2200.c -o $@
+
+qla2300.o : $(SRC_FILES) $(FWFILE3)
+ $(CC) $(CFLAGS) -c qla2300.c -o $@
+
+# @echo "Editing file to produce -> [isp_fw.h]"
+# sh do_fw.sh $(FILE) cvtfw
+# @echo "Editing file to produce -> [isp1_fw.h]"
+# sh do_fw.sh $(FILE2) cvtfw22
diff -urN -X /home/patman/dontdiff src-orig/qla2x00.c src/qla2x00.c
--- src-orig/qla2x00.c Tue Aug 20 02:43:18 2002
+++ src/qla2x00.c Thu Sep 12 15:41:53 2002
@@ -2153,7 +2153,7 @@
struct Scsi_Host *host = ha->host;

host->can_queue = max_srbs; /* default value:-MAX_SRBS(4096) */
- host->cmd_per_lun = 1;
+ host->cmd_per_lun = 16;
host->select_queue_depths = qla2x00_select_queue_depth;
host->n_io_port = 0xFF;

@@ -3785,6 +3785,7 @@
*/

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,9)
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,5,33)
/* As mentioned in kernel/sched.c(RA).....
* Reparent the calling kernel thread to the init task.
*
@@ -3801,6 +3802,7 @@
*/
reparent_to_init();
#endif
+#endif

/*
* Set the name of this process.
@@ -4235,7 +4237,12 @@
if (!(ql2xmaxqdepth == 0 || ql2xmaxqdepth > 256))
device->queue_depth = ql2xmaxqdepth;
#endif
-
+#ifdef CONFIG_SCSI_MULTI_PATH_IO
+ printk(KERN_INFO "Enabled tagged queuing, queue depth %d for ",
+ device->queue_depth);
+ scsi_paths_printk(device, " ", "<%d:%d:%d:%d>");
+ printk("\n");
+#else
printk(KERN_INFO
"scsi(%d:%d:%d:%d): Enabled tagged queuing, "
"queue depth %d.\n",
@@ -4244,6 +4251,7 @@
device->id,
device->lun,
device->queue_depth);
+#endif
}

}
@@ -4260,15 +4268,18 @@
qla2x00_select_queue_depth(struct Scsi_Host *host, Scsi_Device *scsi_devs)
{
Scsi_Device *device;
+#ifdef CONFIG_SCSI_MULTI_PATH_IO
+ scsi_traverse_hndl_t strav_hndl;
+#endif
scsi_qla_host_t *p = (scsi_qla_host_t *) host->hostdata;

ENTER("qla2x00_select_queue_depth");
-
- for (device = scsi_devs; device != NULL; device = device->next) {
- if (device->host == host)
- qla2x00_device_queue_depth(p, device);
- }
-
+#ifdef CONFIG_SCSI_MULTI_PATH_IO
+ scsi_for_each_host_sdev(&strav_hndl, device, host->host_no)
+#else
+ for (device = scsi_devs; device != NULL; device = device->sdev_next)
+#endif
+ qla2x00_device_queue_depth(p, device);
LEAVE("qla2x00_select_queue_depth");
}

@@ -15502,9 +15513,23 @@
unsigned int cmd, unsigned long arg)
{
Scsi_Device fake_scsi_device;
+ int ret;
+
+#ifdef CONFIG_SCSI_MULTI_PATH_IO
+ if (scsi_add_path(&fake_scsi_device, apidev_host, 0,
+ apidev_host->this_id, 0))
+ return -ENODEV;
+#else
fake_scsi_device.host = apidev_host;
+#endif

- return (qla2x00_ioctl(&fake_scsi_device, (int)cmd, (void*)arg));
+ ret = qla2x00_ioctl(&fake_scsi_device, (int)cmd, (void*)arg);
+#ifdef CONFIG_SCSI_MULTI_PATH_IO
+ scsi_remove_path(&fake_scsi_device, SCSI_FIND_ALL_HOST_NO,
+ SCSI_FIND_ALL_CHANNEL, SCSI_FIND_ALL_ID,
+ SCSI_FIND_ALL_LUN);
+#endif
+ return ret;
}

static struct file_operations apidev_fops = {
@@ -15540,7 +15565,7 @@
APIDEV_NODE, apidev_major);)

proc_mknod(APIDEV_NODE, 0777+S_IFCHR, host->hostt->proc_dir,
- (kdev_t)MKDEV(apidev_major, 0));
+ (kdev_t)mk_kdev(apidev_major, 0));

return 0;
}
diff -urN -X /home/patman/dontdiff src-orig/qla2x00_ioctl.c src/qla2x00_ioctl.c
--- src-orig/qla2x00_ioctl.c Tue Aug 20 02:43:18 2002
+++ src/qla2x00_ioctl.c Wed Sep 4 17:19:14 2002
@@ -237,8 +237,13 @@
if (_IOC_TYPE(cmd) != QLMULTIPATH_MAGIC) {
return (-EINVAL);
}
-
+#ifdef CONFIG_SCSI_MULTI_PATH_IO
+ host = scsi_get_host(dev);
+ if (host == NULL)
+ return EXT_STATUS_ERR;
+#else
host = dev->host;
+#endif
ha = (scsi_qla_host_t *) host->hostdata; /* midlayer chosen instance */

ret = verify_area(VERIFY_READ, (void *)arg, sizeof(EXT_IOCTL));
-
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