mptctl.c

LINUX 2.6.17.4的源码

		break;
	case MPT_IOC_POST_RESET:
		ioctl->status &= ~MPT_IOCTL_STATUS_DID_IOCRESET;
		break;
	case MPT_IOC_PRE_RESET:
	default:
		break;
	}

	return 1;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/* ASYNC Event Notification Support */
static int
mptctl_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *pEvReply)
{
	u8 event;

	event = le32_to_cpu(pEvReply->Event) & 0xFF;

	dctlprintk(("%s() called\n", __FUNCTION__));
	if(async_queue == NULL)
		return 1;

	/* Raise SIGIO for persistent events.
	 * TODO - this define is not in MPI spec yet,
	 * but they plan to set it to 0x21
	 */
	 if (event == 0x21 ) {
		ioc->aen_event_read_flag=1;
		dctlprintk(("Raised SIGIO to application\n"));
		devtverboseprintk(("Raised SIGIO to application\n"));
		kill_fasync(&async_queue, SIGIO, POLL_IN);
		return 1;
	 }

	/* This flag is set after SIGIO was raised, and
	 * remains set until the application has read
	 * the event log via ioctl=MPTEVENTREPORT
	 */
	if(ioc->aen_event_read_flag)
		return 1;

	/* Signal only for the events that are
	 * requested for by the application
	 */
	if (ioc->events && (ioc->eventTypes & ( 1 << event))) {
		ioc->aen_event_read_flag=1;
		dctlprintk(("Raised SIGIO to application\n"));
		devtverboseprintk(("Raised SIGIO to application\n"));
		kill_fasync(&async_queue, SIGIO, POLL_IN);
	}
	return 1;
}

static int
mptctl_fasync(int fd, struct file *filep, int mode)
{
	MPT_ADAPTER	*ioc;

	list_for_each_entry(ioc, &ioc_list, list)
		ioc->aen_event_read_flag=0;

	dctlprintk(("%s() called\n", __FUNCTION__));
	return fasync_helper(fd, filep, mode, &async_queue);
}

static int
mptctl_release(struct inode *inode, struct file *filep)
{
	dctlprintk(("%s() called\n", __FUNCTION__));
	return fasync_helper(-1, filep, 0, &async_queue);
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 *  MPT ioctl handler
 *  cmd - specify the particular IOCTL command to be issued
 *  arg - data specific to the command. Must not be null.
 */
static long
__mptctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	mpt_ioctl_header __user *uhdr = (void __user *) arg;
	mpt_ioctl_header	 khdr;
	int iocnum;
	unsigned iocnumX;
	int nonblock = (file->f_flags & O_NONBLOCK);
	int ret;
	MPT_ADAPTER *iocp = NULL;

	dctlprintk(("mptctl_ioctl() called\n"));

	if (copy_from_user(&khdr, uhdr, sizeof(khdr))) {
		printk(KERN_ERR "%s::mptctl_ioctl() @%d - "
				"Unable to copy mpt_ioctl_header data @ %p\n",
				__FILE__, __LINE__, uhdr);
		return -EFAULT;
	}
	ret = -ENXIO;				/* (-6) No such device or address */

	/* Verify intended MPT adapter - set iocnum and the adapter
	 * pointer (iocp)
	 */
	iocnumX = khdr.iocnum & 0xFF;
	if (((iocnum = mpt_verify_adapter(iocnumX, &iocp)) < 0) ||
	    (iocp == NULL)) {
		dctlprintk((KERN_ERR "%s::mptctl_ioctl() @%d - ioc%d not found!\n",
				__FILE__, __LINE__, iocnumX));
		return -ENODEV;
	}

	if (!iocp->active) {
		printk(KERN_ERR "%s::mptctl_ioctl() @%d - Controller disabled.\n",
				__FILE__, __LINE__);
		return -EFAULT;
	}

	/* Handle those commands that are just returning
	 * information stored in the driver.
	 * These commands should never time out and are unaffected
	 * by TM and FW reloads.
	 */
	if ((cmd & ~IOCSIZE_MASK) == (MPTIOCINFO & ~IOCSIZE_MASK)) {
		return mptctl_getiocinfo(arg, _IOC_SIZE(cmd));
	} else if (cmd == MPTTARGETINFO) {
		return mptctl_gettargetinfo(arg);
	} else if (cmd == MPTTEST) {
		return mptctl_readtest(arg);
	} else if (cmd == MPTEVENTQUERY) {
		return mptctl_eventquery(arg);
	} else if (cmd == MPTEVENTENABLE) {
		return mptctl_eventenable(arg);
	} else if (cmd == MPTEVENTREPORT) {
		return mptctl_eventreport(arg);
	} else if (cmd == MPTFWREPLACE) {
		return mptctl_replace_fw(arg);
	}

	/* All of these commands require an interrupt or
	 * are unknown/illegal.
	 */
	if ((ret = mptctl_syscall_down(iocp, nonblock)) != 0)
		return ret;

	dctlprintk((MYIOC_s_INFO_FMT ": mptctl_ioctl()\n", iocp->name));

	if (cmd == MPTFWDOWNLOAD)
		ret = mptctl_fw_download(arg);
	else if (cmd == MPTCOMMAND)
		ret = mptctl_mpt_command(arg);
	else if (cmd == MPTHARDRESET)
		ret = mptctl_do_reset(arg);
	else if ((cmd & ~IOCSIZE_MASK) == (HP_GETHOSTINFO & ~IOCSIZE_MASK))
		ret = mptctl_hp_hostinfo(arg, _IOC_SIZE(cmd));
	else if (cmd == HP_GETTARGETINFO)
		ret = mptctl_hp_targetinfo(arg);
	else
		ret = -EINVAL;

	mutex_unlock(&iocp->ioctl->ioctl_mutex);

	return ret;
}

static long
mptctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
	long ret;
	lock_kernel();
	ret = __mptctl_ioctl(file, cmd, arg);
	unlock_kernel();
	return ret;
}

static int mptctl_do_reset(unsigned long arg)
{
	struct mpt_ioctl_diag_reset __user *urinfo = (void __user *) arg;
	struct mpt_ioctl_diag_reset krinfo;
	MPT_ADAPTER		*iocp;

	dctlprintk((KERN_INFO "mptctl_do_reset called.\n"));

	if (copy_from_user(&krinfo, urinfo, sizeof(struct mpt_ioctl_diag_reset))) {
		printk(KERN_ERR "%s@%d::mptctl_do_reset - "
				"Unable to copy mpt_ioctl_diag_reset struct @ %p\n",
				__FILE__, __LINE__, urinfo);
		return -EFAULT;
	}

	if (mpt_verify_adapter(krinfo.hdr.iocnum, &iocp) < 0) {
		dctlprintk((KERN_ERR "%s@%d::mptctl_do_reset - ioc%d not found!\n",
				__FILE__, __LINE__, krinfo.hdr.iocnum));
		return -ENODEV; /* (-6) No such device or address */
	}

	if (mpt_HardResetHandler(iocp, CAN_SLEEP) != 0) {
		printk (KERN_ERR "%s@%d::mptctl_do_reset - reset failed.\n",
			__FILE__, __LINE__);
		return -1;
	}

	return 0;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 * MPT FW download function.  Cast the arg into the mpt_fw_xfer structure.
 * This structure contains: iocnum, firmware length (bytes),
 *      pointer to user space memory where the fw image is stored.
 *
 * Outputs:	None.
 * Return:	0 if successful
 *		-EFAULT if data unavailable
 *		-ENXIO  if no such device
 *		-EAGAIN if resource problem
 *		-ENOMEM if no memory for SGE
 *		-EMLINK if too many chain buffers required
 *		-EBADRQC if adapter does not support FW download
 *		-EBUSY if adapter is busy
 *		-ENOMSG if FW upload returned bad status
 */
static int
mptctl_fw_download(unsigned long arg)
{
	struct mpt_fw_xfer __user *ufwdl = (void __user *) arg;
	struct mpt_fw_xfer	 kfwdl;

	dctlprintk((KERN_INFO "mptctl_fwdl called. mptctl_id = %xh\n", mptctl_id)); //tc
	if (copy_from_user(&kfwdl, ufwdl, sizeof(struct mpt_fw_xfer))) {
		printk(KERN_ERR "%s@%d::_ioctl_fwdl - "
				"Unable to copy mpt_fw_xfer struct @ %p\n",
				__FILE__, __LINE__, ufwdl);
		return -EFAULT;
	}

	return mptctl_do_fw_download(kfwdl.iocnum, kfwdl.bufp, kfwdl.fwlen);
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 * FW Download engine.
 * Outputs:	None.
 * Return:	0 if successful
 *		-EFAULT if data unavailable
 *		-ENXIO  if no such device
 *		-EAGAIN if resource problem
 *		-ENOMEM if no memory for SGE
 *		-EMLINK if too many chain buffers required
 *		-EBADRQC if adapter does not support FW download
 *		-EBUSY if adapter is busy
 *		-ENOMSG if FW upload returned bad status
 */
static int
mptctl_do_fw_download(int ioc, char __user *ufwbuf, size_t fwlen)
{
	FWDownload_t		*dlmsg;
	MPT_FRAME_HDR		*mf;
	MPT_ADAPTER		*iocp;
	FWDownloadTCSGE_t	*ptsge;
	MptSge_t		*sgl, *sgIn;
	char			*sgOut;
	struct buflist		*buflist;
	struct buflist		*bl;
	dma_addr_t		 sgl_dma;
	int			 ret;
	int			 numfrags = 0;
	int			 maxfrags;
	int			 n = 0;
	u32			 sgdir;
	u32			 nib;
	int			 fw_bytes_copied = 0;
	int			 i;
	int			 sge_offset = 0;
	u16			 iocstat;
	pFWDownloadReply_t	 ReplyMsg = NULL;

	dctlprintk(("mptctl_do_fwdl called. mptctl_id = %xh.\n", mptctl_id));

	dctlprintk(("DbG: kfwdl.bufp  = %p\n", ufwbuf));
	dctlprintk(("DbG: kfwdl.fwlen = %d\n", (int)fwlen));
	dctlprintk(("DbG: kfwdl.ioc   = %04xh\n", ioc));

	if (mpt_verify_adapter(ioc, &iocp) < 0) {
		dctlprintk(("ioctl_fwdl - ioc%d not found!\n",
				 ioc));
		return -ENODEV; /* (-6) No such device or address */
	} else {

		/*  Valid device. Get a message frame and construct the FW download message.
	 	*/
		if ((mf = mpt_get_msg_frame(mptctl_id, iocp)) == NULL)
			return -EAGAIN;
	}
	dlmsg = (FWDownload_t*) mf;
	ptsge = (FWDownloadTCSGE_t *) &dlmsg->SGL;
	sgOut = (char *) (ptsge + 1);

	/*
	 * Construct f/w download request
	 */
	dlmsg->ImageType = MPI_FW_DOWNLOAD_ITYPE_FW;
	dlmsg->Reserved = 0;
	dlmsg->ChainOffset = 0;
	dlmsg->Function = MPI_FUNCTION_FW_DOWNLOAD;
	dlmsg->Reserved1[0] = dlmsg->Reserved1[1] = dlmsg->Reserved1[2] = 0;
	if (iocp->facts.MsgVersion >= MPI_VERSION_01_05)
		dlmsg->MsgFlags = MPI_FW_DOWNLOAD_MSGFLGS_LAST_SEGMENT;
	else
		dlmsg->MsgFlags = 0;


	/* Set up the Transaction SGE.
	 */
	ptsge->Reserved = 0;
	ptsge->ContextSize = 0;
	ptsge->DetailsLength = 12;
	ptsge->Flags = MPI_SGE_FLAGS_TRANSACTION_ELEMENT;
	ptsge->Reserved_0100_Checksum = 0;
	ptsge->ImageOffset = 0;
	ptsge->ImageSize = cpu_to_le32(fwlen);

	/* Add the SGL
	 */

	/*
	 * Need to kmalloc area(s) for holding firmware image bytes.
	 * But we need to do it piece meal, using a proper
	 * scatter gather list (with 128kB MAX hunks).
	 *
	 * A practical limit here might be # of sg hunks that fit into
	 * a single IOC request frame; 12 or 8 (see below), so:
	 * For FC9xx: 12 x 128kB == 1.5 mB (max)
	 * For C1030:  8 x 128kB == 1   mB (max)
	 * We could support chaining, but things get ugly(ier:)
	 *
	 * Set the sge_offset to the start of the sgl (bytes).
	 */
	sgdir = 0x04000000;		/* IOC will READ from sys mem */
	sge_offset = sizeof(MPIHeader_t) + sizeof(FWDownloadTCSGE_t);
	if ((sgl = kbuf_alloc_2_sgl(fwlen, sgdir, sge_offset,
				    &numfrags, &buflist, &sgl_dma, iocp)) == NULL)
		return -ENOMEM;

	/*
	 * We should only need SGL with 2 simple_32bit entries (up to 256 kB)
	 * for FC9xx f/w image, but calculate max number of sge hunks
	 * we can fit into a request frame, and limit ourselves to that.
	 * (currently no chain support)
	 * maxfrags = (Request Size - FWdownload Size ) / Size of 32 bit SGE
	 *	Request		maxfrags
	 *	128		12
	 *	96		8
	 *	64		4
	 */
	maxfrags = (iocp->req_sz - sizeof(MPIHeader_t) - sizeof(FWDownloadTCSGE_t))
			/ (sizeof(dma_addr_t) + sizeof(u32));
	if (numfrags > maxfrags) {
		ret = -EMLINK;
		goto fwdl_out;
	}

	dctlprintk(("DbG: sgl buffer  = %p, sgfrags = %d\n", sgl, numfrags));

	/*
	 * Parse SG list, copying sgl itself,
	 * plus f/w image hunks from user space as we go...
	 */
	ret = -EFAULT;
	sgIn = sgl;
	bl = buflist;
	for (i=0; i < numfrags; i++) {

		/* Get the SGE type: 0 - TCSGE, 3 - Chain, 1 - Simple SGE
		 * Skip everything but Simple. If simple, copy from
		 *	user space into kernel space.
		 * Note: we should not have anything but Simple as
		 *	Chain SGE are illegal.
		 */
		nib = (sgIn->FlagsLength & 0x30000000) >> 28;
		if (nib == 0 || nib == 3) {
			;
		} else if (sgIn->Address) {
			mpt_add_sge(sgOut, sgIn->FlagsLength, sgIn->Address);
			n++;
			if (copy_from_user(bl->kptr, ufwbuf+fw_bytes_copied, bl->len)) {
				printk(KERN_ERR "%s@%d::_ioctl_fwdl - "
						"Unable to copy f/w buffer hunk#%d @ %p\n",
						__FILE__, __LINE__, n, ufwbuf);
				goto fwdl_out;
			}
			fw_bytes_copied += bl->len;
		}
		sgIn++;
		bl++;
		sgOut += (sizeof(dma_addr_t) + sizeof(u32));
	}

#ifdef MPT_DEBUG
	{
		u32 *m = (u32 *)mf;
		printk(KERN_INFO MYNAM ": F/W download request:\n" KERN_INFO " ");
		for (i=0; i < 7+numfrags*2; i++)
			printk(" %08x", le32_to_cpu(m[i]));
		printk("\n");
	}
#endif

	/*
	 * Finally, perform firmware download.
	 */
	ReplyMsg = NULL;
	mpt_put_msg_frame(mptctl_id, iocp, mf);

	/* Now wait for the command to complete */
	ret = wait_event_timeout(mptctl_wait,
	     iocp->ioctl->wait_done == 1,
	     HZ*60);

	if(ret <=0 && (iocp->ioctl->wait_done != 1 )) {
	/* Now we need to reset the board */
		mptctl_timeout_expired(iocp->ioctl);
		ret = -ENODATA;
		goto fwdl_out;
	}

	if (sgl)
		kfree_sgl(sgl, sgl_dma, buflist, iocp);

	ReplyMsg = (pFWDownloadReply_t)iocp->ioctl->ReplyFrame;
	iocstat = le16_to_cpu(ReplyMsg->IOCStatus) & MPI_IOCSTATUS_MASK;
	if (iocstat == MPI_IOCSTATUS_SUCCESS) {
		printk(KERN_INFO MYNAM ": F/W update successfully sent to %s!\n", iocp->name);
		return 0;
	} else if (iocstat == MPI_IOCSTATUS_INVALID_FUNCTION) {
		printk(KERN_WARNING MYNAM ": ?Hmmm...  %s says it doesn't support F/W download!?!\n",
				iocp->name);
		printk(KERN_WARNING MYNAM ": (time to go bang on somebodies door)\n");
		return -EBADRQC;
	} else if (iocstat == MPI_IOCSTATUS_BUSY) {
		printk(KERN_WARNING MYNAM ": Warning!  %s says: IOC_BUSY!\n", iocp->name);
		printk(KERN_WARNING MYNAM ": (try again later?)\n");
		return -EBUSY;
	} else {
		printk(KERN_WARNING MYNAM "::ioctl_fwdl() ERROR!  %s returned [bad] status = %04xh\n",
				    iocp->name, iocstat);
		printk(KERN_WARNING MYNAM ": (bad VooDoo)\n");
		return -ENOMSG;
	}
	return 0;

fwdl_out:
        kfree_sgl(sgl, sgl_dma, buflist, iocp);
	return ret;
}

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
 * SGE Allocation routine
 *
 * Inputs:	bytes - number of bytes to be transferred
 *		sgdir - data direction
 *		sge_offset - offset (in bytes) from the start of the request
 *			frame to the first SGE
 *		ioc - pointer to the mptadapter
 * Outputs:	frags - number of scatter gather elements