/Documentation/scsi/ChangeLog.megaraid

  1Release Date	: Thu Feb 03 12:27:22 EST 2005 - Seokmann Ju <sju@lsil.com>
  2Current Version	: 2.20.4.5 (scsi module), 2.20.2.5 (cmm module)
  3Older Version	: 2.20.4.4 (scsi module), 2.20.2.4 (cmm module)
  4
  51.	Modified name of two attributes in scsi_host_template.
  6	On Wed, 2005-02-02 at 10:56 -0500, Ju, Seokmann wrote:
  7	> +	.sdev_attrs			= megaraid_device_attrs,
  8	> +	.shost_attrs			= megaraid_class_device_attrs,
  9
 10	These are, perhaps, slightly confusing names.
 11	The terms device and class_device have well defined meanings in the
 12	generic device model, neither of which is what you mean here.
 13	Why not simply megaraid_sdev_attrs and megaraid_shost_attrs?
 14
 15	Other than this, it looks fine to me too.
 16
 17Release Date	: Thu Jan 27 00:01:03 EST 2005 - Atul Mukker <atulm@lsil.com>
 18Current Version	: 2.20.4.4 (scsi module), 2.20.2.5 (cmm module)
 19Older Version	: 2.20.4.3 (scsi module), 2.20.2.4 (cmm module)
 20
 211.	Bump up the version of scsi module due to its conflict.
 22
 23Release Date	: Thu Jan 21 00:01:03 EST 2005 - Atul Mukker <atulm@lsil.com>
 24Current Version	: 2.20.4.3 (scsi module), 2.20.2.5 (cmm module)
 25Older Version	: 2.20.4.2 (scsi module), 2.20.2.4 (cmm module)
 26
 271.	Remove driver ioctl for logical drive to scsi address translation and
 28	replace with the sysfs attribute. To remove drives and change
 29	capacity, application shall now use the device attribute to get the
 30	logical drive number for a scsi device. For adding newly created
 31	logical drives, class device attribute would be required to uniquely
 32	identify each controller.
 33		- Atul Mukker <atulm@lsil.com>
 34
 35	"James, I've been thinking about this a little more, and you may be on
 36	to something here. Let each driver add files as such:"
 37
 38		- Matt Domsch <Matt_Domsch@dell.com>, 12.15.2004
 39		 linux-scsi mailing list
 40
 41
 42	"Then, if you simply publish your LD number as an extra parameter of
 43	the device, you can look through /sys to find it."
 44
 45		- James Bottomley <James.Bottomley@SteelEye.com>, 01.03.2005
 46		 linux-scsi mailing list
 47
 48
 49	"I don't see why not ... it's your driver, you can publish whatever
 50	extra information you need as scsi_device attributes; that was one of
 51	the designs of the extensible attribute system."
 52
 53		- James Bottomley <James.Bottomley@SteelEye.com>, 01.06.2005
 54		 linux-scsi mailing list
 55
 562.	Add AMI megaraid support - Brian King <brking@charter.net>
 57		PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID3,
 58		PCI_VENDOR_ID_AMI, PCI_SUBSYS_ID_PERC3_DC,
 59
 603.	Make some code static - Adrian Bunk <bunk@stusta.de>
 61	Date:	Mon, 15 Nov 2004 03:14:57 +0100
 62
 63	The patch below makes some needlessly global code static.
 64	-wait_queue_head_t wait_q;
 65	+static wait_queue_head_t wait_q;
 66
 67	Signed-off-by: Adrian Bunk <bunk@stusta.de>
 68
 694.	Added NEC ROMB support - NEC MegaRAID PCI Express ROMB controller
 70		PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_MEGARAID_NEC_ROMB_2E,
 71		PCI_SUBSYS_ID_NEC, PCI_SUBSYS_ID_MEGARAID_NEC_ROMB_2E,
 72
 735.	Fixed Tape drive issue : For any Direct CDB command to physical device
 74	including tape, timeout value set by driver was 10 minutes. With this 
 75	value, most of command will return within timeout. However, for those
 76	command like ERASE or FORMAT, it takes more than an hour depends on
 77	capacity of the device and the command could be terminated before it 
 78	completes.
 79	To address this issue, the 'timeout' field in the DCDB command will 
 80	have NO TIMEOUT (i.e., 4) value as its timeout on DCDB command.
 81
 82
 83
 84Release Date	: Thu Dec  9 19:10:23 EST 2004
 85	- Sreenivas Bagalkote <sreenib@lsil.com>
 86
 87Current Version	: 2.20.4.2 (scsi module), 2.20.2.4 (cmm module)
 88Older Version	: 2.20.4.1 (scsi module), 2.20.2.3 (cmm module)
 89
 90i.	Introduced driver ioctl that returns scsi address for a given ld.
 91	
 92	"Why can't the existing sysfs interfaces be used to do this?"
 93		- Brian King (brking@us.ibm.com)
 94	
 95	"I've looked into solving this another way, but I cannot see how
 96	to get this driver-private mapping of logical drive number-> HCTL
 97	without putting code something like this into the driver."
 98
 99	"...and by providing a mapping a function to userspace, the driver
100	is free to change its mapping algorithm in the future if necessary .."
101		- Matt Domsch (Matt_Domsch@dell.com)
102
103Release Date	: Thu Dec  9 19:02:14 EST 2004 - Sreenivas Bagalkote <sreenib@lsil.com>
104
105Current Version	: 2.20.4.1 (scsi module), 2.20.2.3 (cmm module)
106Older Version	: 2.20.4.1 (scsi module), 2.20.2.2 (cmm module)
107
108i.	Fix a bug in kioc's dma buffer deallocation
109
110Release Date	: Thu Nov  4 18:24:56 EST 2004 - Sreenivas Bagalkote <sreenib@lsil.com>
111
112Current Version	: 2.20.4.1 (scsi module), 2.20.2.2 (cmm module)
113Older Version	: 2.20.4.0 (scsi module), 2.20.2.1 (cmm module)
114
115i.	Handle IOCTL cmd timeouts more properly.
116
117ii.	pci_dma_sync_{sg,single}_for_cpu was introduced into megaraid_mbox
118	incorrectly (instead of _for_device). Changed to appropriate 
119	pci_dma_sync_{sg,single}_for_device.
120
121Release Date	: Wed Oct 06 11:15:29 EDT 2004 - Sreenivas Bagalkote <sreenib@lsil.com>
122Current Version	: 2.20.4.0 (scsi module), 2.20.2.1 (cmm module)
123Older Version	: 2.20.4.0 (scsi module), 2.20.2.0 (cmm module)
124
125i.	Remove CONFIG_COMPAT around register_ioctl32_conversion
126
127Release Date	: Mon Sep 27 22:15:07 EDT 2004 - Atul Mukker <atulm@lsil.com>
128Current Version	: 2.20.4.0 (scsi module), 2.20.2.0 (cmm module)
129Older Version	: 2.20.3.1 (scsi module), 2.20.2.0 (cmm module)
130
131i.	Fix data corruption. Because of a typo in the driver, the IO packets
132	were wrongly shared by the ioctl path. This causes a whole IO command
133	to be replaced by an incoming ioctl command.
134
135Release Date	: Tue Aug 24 09:43:35 EDT 2004 - Atul Mukker <atulm@lsil.com>
136Current Version	: 2.20.3.1 (scsi module), 2.20.2.0 (cmm module)
137Older Version	: 2.20.3.0 (scsi module), 2.20.2.0 (cmm module)
138
139i.	Function reordering so that inline functions are defined before they
140	are actually used. It is now mandatory for GCC 3.4.1 (current stable)
141
142	Declare some heavy-weight functions to be non-inlined,
143	megaraid_mbox_build_cmd, megaraid_mbox_runpendq,
144	megaraid_mbox_prepare_pthru, megaraid_mbox_prepare_epthru,
145	megaraid_busywait_mbox
146
147		- Andrew Morton <akpm@osdl.org>, 08.19.2004
148		linux-scsi mailing list
149
150	"Something else to clean up after inclusion: every instance of an
151	inline function is actually rendered as a full function call, because
152	the function is always used before it is defined.  Atul, please
153	re-arrange the code to eliminate the need for most (all) of the
154	function prototypes at the top of each file, and define (not just
155	declare with a prototype) each inline function before its first use"
156
157		- Matt Domsch <Matt_Domsch@dell.com>, 07.27.2004
158		linux-scsi mailing list
159
160
161ii.	Display elapsed time (countdown) while waiting for FW to boot.
162
163iii.	Module compilation reorder in Makefile so that unresolved symbols do
164	not occur when driver is compiled non-modular.
165
166		Patrick J. LoPresti <patl@users.sourceforge.net>, 8.22.2004
167		linux-scsi mailing list
168
169
170Release Date	: Thu Aug 19 09:58:33 EDT 2004 - Atul Mukker <atulm@lsil.com>
171Current Version	: 2.20.3.0 (scsi module), 2.20.2.0 (cmm module)
172Older Version	: 2.20.2.0 (scsi module), 2.20.1.0 (cmm module)
173
174i.	When copying the mailbox packets, copy only first 14 bytes (for 32-bit
175	mailboxes) and only first 22 bytes (for 64-bit mailboxes). This is to
176	avoid getting the stale values for busy bit. We want to set the busy
177	bit just before issuing command to the FW.
178
179ii.	In the reset handling, if the reseted command is not owned by the
180	driver, do not (wrongly) print information for the "attached" driver
181	packet.
182
183iii.	Have extended wait when issuing command in synchronous mode. This is
184	required for the cases where the option ROM is disabled and there is
185	no BIOS to start the controller. The FW starts to boot after receiving
186	the first command from the driver. The current driver has 1 second
187	timeout for the synchronous commands, which is far less than what is
188	actually required. We now wait up to MBOX_RESET_TIME (180 seconds) for
189	FW boot process.
190
191iv.	In megaraid_mbox_product_info, clear the mailbox contents completely
192	before preparing the command for inquiry3. This is to ensure that the
193	FW does not get junk values in the command.
194
195v.	Do away with the redundant LSI_CONFIG_COMPAT redefinition for
196	CONFIG_COMPAT. Replace <asm/ioctl32.h> with <linux/ioctl32.h>
197
198		- James Bottomley <James.Bottomley@SteelEye.com>, 08.17.2004
199		 linux-scsi mailing list
200
201vi.	Add support for 64-bit applications. Current drivers assume only
202	32-bit applications, even on 64-bit platforms. Use the "data" and
203	"buffer" fields of the mimd_t structure, instead of embedded 32-bit
204	addresses in application mailbox and passthru structures.
205
206vii.	Move the function declarations for the management module from
207	megaraid_mm.h to megaraid_mm.c
208
209		- Andrew Morton <akpm@osdl.org>, 08.19.2004
210		linux-scsi mailing list
211
212viii.	Change default values for MEGARAID_NEWGEN, MEGARAID_MM, and
213	MEGARAID_MAILBOX to 'n' in Kconfig.megaraid
214
215		- Andrew Morton <akpm@osdl.org>, 08.19.2004
216		linux-scsi mailing list
217
218ix.	replace udelay with msleep
219
220x.	Typos corrected in comments and whitespace adjustments, explicit
221	grouping of expressions.
222
223
224Release Date	: Fri Jul 23 15:22:07 EDT 2004 - Atul Mukker <atulm@lsil.com>
225Current Version	: 2.20.2.0 (scsi module), 2.20.1.0 (cmm module)
226Older Version	: 2.20.1.0 (scsi module), 2.20.0.0 (cmm module)
227
228i.	Add PCI ids for Acer ROMB 2E solution
229
230ii.	Add PCI ids for I4
231
232iii.	Typo corrected for subsys id for megaraid sata 300-4x
233
234iv.	Remove yield() while mailbox handshake in synchronous commands
235
236
237	"My other main gripe is things like this:
238
239	+	// wait for maximum 1 second for status to post
240	+	for (i = 0; i < 40000; i++) {
241	+		if (mbox->numstatus != 0xFF) break;
242	+		udelay(25); yield();
243	+	}
244
245	which litter the driver.  Use of yield() in drivers is deprecated."
246
247		- James Bottomley <James.Bottomley@SteelEye.com>, 07.14.2004
248		 linux-scsi mailing list
249
250v.	Remove redundant __megaraid_busywait_mbox routine
251
252vi.	Fix bug in the managment module, which causes a system lockup when the
253	IO module is loaded and then unloaded, followed by executing any
254	management utility. The current version of management module does not
255	handle the adapter unregister properly.
256
257	Specifically, it still keeps a reference to the unregistered
258	controllers. To avoid this, the static array adapters has been
259	replaced by a dynamic list, which gets updated every time an adapter
260	is added or removed.
261
262	Also, during unregistration of the IO module, the resources are
263	now released in the exact reverse order of the allocation time
264	sequence.
265
266
267Release Date	: Fri Jun 25 18:58:43 EDT 2004 - Atul Mukker <atulm@lsil.com>
268Current Version	: 2.20.1.0
269Older Version	: megaraid 2.20.0.1
270
271i.	Stale list pointer in adapter causes kernel panic when module
272	megaraid_mbox is unloaded
273
274
275Release Date	: Thu Jun 24 20:37:11 EDT 2004 - Atul Mukker <atulm@lsil.com>
276Current Version	: 2.20.0.1
277Older Version	: megaraid 2.20.0.00
278
279i.	Modules are not 'y' by default, but depend on current definition of
280	SCSI & PCI.
281
282ii.	Redundant structure mraid_driver_t removed.
283
284iii.	Miscellaneous indentation and goto/label fixes.
285		- Christoph Hellwig <hch@infradead.org>, 06.24.2004 linux-scsi
286
287iv.	scsi_host_put(), do just before completing HBA shutdown.
288
289
290
291Release Date	: Mon Jun 21 19:53:54 EDT 2004 - Atul Mukker <atulm@lsil.com>
292Current Version	: 2.20.0.0
293Older Version	: megaraid 2.20.0.rc2 and 2.00.3
294
295i.	Independent module to interact with userland applications and
296	multiplex command to low level RAID module(s).
297
298	"Shared code in a third module, a "library module", is an acceptable
299	solution. modprobe automatically loads dependent modules, so users
300	running "modprobe driver1" or "modprobe driver2" would automatically
301	load the shared library module."
302
303		- Jeff Garzik <jgarzik@pobox.com> 02.25.2004 LKML
304
305	"As Jeff hinted, if your userspace<->driver API is consistent between
306	your new MPT-based RAID controllers and your existing megaraid driver,
307	then perhaps you need a single small helper module (lsiioctl or some
308	better name), loaded by both mptraid and megaraid automatically, which
309	handles registering the /dev/megaraid node dynamically. In this case,
310	both mptraid and megaraid would register with lsiioctl for each
311	adapter discovered, and lsiioctl would essentially be a switch,
312	redirecting userspace tool ioctls to the appropriate driver."
313
314		- Matt Domsch <Matt_Domsch@dell.com> 02.25.2004 LKML
315
316ii.	Remove C99 initializations from pci_device id.
317
318	"pci_id_table_g would be much more readable when not using C99
319	initializers.
320	PCI table doesn't change, there's lots of users that prefer the more
321	readable variant.  And it's really far less and much easier to grok
322	lines without C99 initializers."
323
324		- Christoph Hellwig <hch@infradead.org>, 05.28.2004 linux-scsi
325
326iii.	Many fixes as suggested by Christoph Hellwig <hch@infradead.org> on
327	linux-scsi, 05.28.2004
328
329iv.	We now support up to 32 parallel ioctl commands instead of current 1.
330	There is a conscious effort to let memory allocation not fail for ioctl
331	commands.
332
333v.	Do away with internal memory management. Use pci_pool_(create|alloc)
334	instead.
335
336vi.	Kill tasklet when unloading the driver.
337
338vii.	Do not use "host_lock', driver has fine-grain locks now to protect all
339	data structures.
340
341viii.	Optimize the build scatter-gather list routine. The callers already
342	know the data transfer address and length.
343
344ix.	Better implementation of error handling and recovery. Driver now
345	performs extended errors recovery for instances like scsi cable pull.
346
347x.	Disassociate the management commands with an overlaid scsi command.
348	Driver now treats the management packets as special packets and has a
349	dedicated callback routine.