isci: Intel(R) C600 Series Chipset Storage Control Unit Driver

Support for the up to 2x4-port 6Gb/s SAS controllers embedded in the
chipset.

This is a snapshot of the first publicly available version of the driver,
commit 4c1db2d0 in the 'historical' branch.

   git://git.kernel.org/pub/scm/linux/kernel/git/djbw/isci.git historical

Signed-off-by: Maciej Trela <maciej.trela@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Edmund Nadolski <edmund.nadolski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 179 insertions, 0 deletions

diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c
new file mode 100644
index 00000000000..fbda570d25e
--- /dev/null
+++ b/drivers/scsi/isci/phy.c
@@ -0,0 +1,179 @@
+/*
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in
+ *     the documentation and/or other materials provided with the
+ *     distribution.
+ *   * Neither the name of Intel Corporation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "isci.h"
+#include "phy.h"
+#include "scic_port.h"
+#include "scic_config_parameters.h"
+
+
+/**
+ * isci_phy_init() - This function is called by the probe function to
+ *    initialize the phy objects. This func assumes that the isci_port objects
+ *    associated with the SCU have been initialized.
+ * @isci_phy: This parameter specifies the isci_phy object to initialize
+ * @isci_host: This parameter specifies the parent SCU host object for this
+ *    isci_phy
+ * @index: This parameter specifies which SCU phy associates with this
+ *    isci_phy. Generally, SCU phy 0 relates isci_phy 0, etc.
+ *
+ */
+void isci_phy_init(
+	struct isci_phy *phy,
+	struct isci_host *isci_host,
+	int index)
+{
+	struct scic_sds_controller *controller = isci_host->core_controller;
+	struct scic_sds_phy *scic_phy;
+	union scic_oem_parameters oem_parameters;
+	enum sci_status status = SCI_SUCCESS;
+
+	/*--------------- SCU_Phy Initialization Stuff -----------------------*/
+
+	status = scic_controller_get_phy_handle(controller, index, &scic_phy);
+	if (status == SCI_SUCCESS) {
+		sci_object_set_association(scic_phy, (void *)phy);
+		phy->sci_phy_handle = scic_phy;
+	} else
+		dev_err(&isci_host->pdev->dev,
+			"failed scic_controller_get_phy_handle\n");
+
+	scic_oem_parameters_get(controller, &oem_parameters);
+
+	phy->sas_addr[0] =  oem_parameters.sds1.phys[index].sas_address.low
+			   & 0xFF;
+	phy->sas_addr[1] = (oem_parameters.sds1.phys[index].sas_address.low
+			    >> 8)   & 0xFF;
+	phy->sas_addr[2] = (oem_parameters.sds1.phys[index].sas_address.low
+			    >> 16)  & 0xFF;
+	phy->sas_addr[3] = (oem_parameters.sds1.phys[index].sas_address.low
+			    >> 24)  & 0xFF;
+	phy->sas_addr[4] =  oem_parameters.sds1.phys[index].sas_address.high
+			   & 0xFF;
+	phy->sas_addr[5] = (oem_parameters.sds1.phys[index].sas_address.high
+			    >> 8)  & 0xFF;
+	phy->sas_addr[6] = (oem_parameters.sds1.phys[index].sas_address.high
+			    >> 16) & 0xFF;
+	phy->sas_addr[7] = (oem_parameters.sds1.phys[index].sas_address.high
+			    >> 24) & 0xFF;
+
+	phy->isci_port = NULL;
+	phy->sas_phy.enabled = 0;
+	phy->sas_phy.id = index;
+	phy->sas_phy.sas_addr = &phy->sas_addr[0];
+	phy->sas_phy.frame_rcvd = (u8 *)&phy->frame_rcvd;
+	phy->sas_phy.ha = &isci_host->sas_ha;
+	phy->sas_phy.lldd_phy = phy;
+	phy->sas_phy.enabled = 1;
+	phy->sas_phy.class = SAS;
+	phy->sas_phy.iproto = SAS_PROTOCOL_ALL;
+	phy->sas_phy.tproto = 0;
+	phy->sas_phy.type = PHY_TYPE_PHYSICAL;
+	phy->sas_phy.role = PHY_ROLE_INITIATOR;
+	phy->sas_phy.oob_mode = OOB_NOT_CONNECTED;
+	phy->sas_phy.linkrate = SAS_LINK_RATE_UNKNOWN;
+	memset((u8 *)&phy->frame_rcvd, 0, sizeof(phy->frame_rcvd));
+}
+
+
+/**
+ * isci_phy_control() - This function is one of the SAS Domain Template
+ *    functions. This is a phy management function.
+ * @phy: This parameter specifies the sphy being controlled.
+ * @func: This parameter specifies the phy control function being invoked.
+ * @buf: This parameter is specific to the phy function being invoked.
+ *
+ * status, zero indicates success.
+ */
+int isci_phy_control(
+	struct asd_sas_phy *phy,
+	enum phy_func func,
+	void *buf)
+{
+	int ret            = TMF_RESP_FUNC_COMPLETE;
+	struct isci_phy *isci_phy_ptr  = (struct isci_phy *)phy->lldd_phy;
+	struct isci_port *isci_port_ptr = NULL;
+
+	if (isci_phy_ptr != NULL)
+		isci_port_ptr = isci_phy_ptr->isci_port;
+
+	if ((isci_phy_ptr == NULL) || (isci_port_ptr == NULL)) {
+		pr_err("%s: asd_sas_phy %p: lldd_phy %p or "
+		       "isci_port %p == NULL!\n",
+		       __func__, phy, isci_phy_ptr, isci_port_ptr);
+		return TMF_RESP_FUNC_FAILED;
+	}
+
+	pr_debug("%s: phy %p; func %d; buf %p; isci phy %p, port %p\n",
+		 __func__, phy, func, buf, isci_phy_ptr, isci_port_ptr);
+
+	switch (func) {
+	case PHY_FUNC_HARD_RESET:
+	case PHY_FUNC_LINK_RESET:
+
+		/* Perform the port reset. */
+		ret = isci_port_perform_hard_reset(isci_port_ptr, isci_phy_ptr);
+
+		break;
+
+	case PHY_FUNC_DISABLE:
+	default:
+		pr_debug("%s: phy %p; func %d NOT IMPLEMENTED!\n",
+			 __func__, phy, func);
+		ret = TMF_RESP_FUNC_FAILED;
+		break;
+	}
+	return ret;
+}