1 files changed, 311 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/nvm.c b/drivers/net/wireless/iwlwifi/mvm/nvm.c
new file mode 100644
index 000000000000..20016bcbdeab
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/mvm/nvm.c
@@ -0,0 +1,311 @@
+/******************************************************************************
+ *
+ * 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) 2012 - 2013 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 Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2012 - 2013 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 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 "iwl-trans.h"
+#include "mvm.h"
+#include "iwl-eeprom-parse.h"
+#include "iwl-eeprom-read.h"
+#include "iwl-nvm-parse.h"
+
+/* list of NVM sections we are allowed/need to read */
+static const int nvm_to_read[] = {
+	NVM_SECTION_TYPE_HW,
+	NVM_SECTION_TYPE_SW,
+	NVM_SECTION_TYPE_CALIBRATION,
+	NVM_SECTION_TYPE_PRODUCTION,
+};
+
+/* used to simplify the shared operations on NCM_ACCESS_CMD versions */
+union iwl_nvm_access_cmd {
+	struct iwl_nvm_access_cmd_ver1 ver1;
+	struct iwl_nvm_access_cmd_ver2 ver2;
+};
+union iwl_nvm_access_resp {
+	struct iwl_nvm_access_resp_ver1 ver1;
+	struct iwl_nvm_access_resp_ver2 ver2;
+};
+
+static inline void iwl_nvm_fill_read_ver1(struct iwl_nvm_access_cmd_ver1 *cmd,
+					  u16 offset, u16 length)
+{
+	cmd->offset = cpu_to_le16(offset);
+	cmd->length = cpu_to_le16(length);
+	cmd->cache_refresh = 1;
+}
+
+static inline void iwl_nvm_fill_read_ver2(struct iwl_nvm_access_cmd_ver2 *cmd,
+					  u16 offset, u16 length, u16 section)
+{
+	cmd->offset = cpu_to_le16(offset);
+	cmd->length = cpu_to_le16(length);
+	cmd->type = cpu_to_le16(section);
+}
+
+static int iwl_nvm_read_chunk(struct iwl_mvm *mvm, u16 section,
+			      u16 offset, u16 length, u8 *data)
+{
+	union iwl_nvm_access_cmd nvm_access_cmd;
+	union iwl_nvm_access_resp *nvm_resp;
+	struct iwl_rx_packet *pkt;
+	struct iwl_host_cmd cmd = {
+		.id = NVM_ACCESS_CMD,
+		.flags = CMD_SYNC | CMD_WANT_SKB,
+		.data = { &nvm_access_cmd, },
+	};
+	int ret, bytes_read, offset_read;
+	u8 *resp_data;
+
+	memset(&nvm_access_cmd, 0, sizeof(nvm_access_cmd));
+
+	/* TODO: not sure family should be the decider, maybe FW version? */
+	if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
+		iwl_nvm_fill_read_ver2(&(nvm_access_cmd.ver2),
+				       offset, length, section);
+		cmd.len[0] = sizeof(struct iwl_nvm_access_cmd_ver2);
+	} else {
+		iwl_nvm_fill_read_ver1(&(nvm_access_cmd.ver1),
+				       offset, length);
+		cmd.len[0] = sizeof(struct iwl_nvm_access_cmd_ver1);
+	}
+
+	ret = iwl_mvm_send_cmd(mvm, &cmd);
+	if (ret)
+		return ret;
+
+	pkt = cmd.resp_pkt;
+	if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
+		IWL_ERR(mvm, "Bad return from NVM_ACCES_COMMAND (0x%08X)\n",
+			pkt->hdr.flags);
+		ret = -EIO;
+		goto exit;
+	}
+
+	/* Extract NVM response */
+	nvm_resp = (void *)pkt->data;
+	if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
+		ret = le16_to_cpu(nvm_resp->ver2.status);
+		bytes_read = le16_to_cpu(nvm_resp->ver2.length);
+		offset_read = le16_to_cpu(nvm_resp->ver2.offset);
+		resp_data = nvm_resp->ver2.data;
+	} else {
+		ret = le16_to_cpu(nvm_resp->ver1.length) <= 0;
+		bytes_read = le16_to_cpu(nvm_resp->ver1.length);
+		offset_read = le16_to_cpu(nvm_resp->ver1.offset);
+		resp_data = nvm_resp->ver1.data;
+	}
+	if (ret) {
+		IWL_ERR(mvm,
+			"NVM access command failed with status %d (device: %s)\n",
+			ret, mvm->cfg->name);
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	if (offset_read != offset) {
+		IWL_ERR(mvm, "NVM ACCESS response with invalid offset %d\n",
+			offset_read);
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	/* Write data to NVM */
+	memcpy(data + offset, resp_data, bytes_read);
+	ret = bytes_read;
+
+exit:
+	iwl_free_resp(&cmd);
+	return ret;
+}
+
+/*
+ * Reads an NVM section completely.
+ * NICs prior to 7000 family doesn't have a real NVM, but just read
+ * section 0 which is the EEPROM. Because the EEPROM reading is unlimited
+ * by uCode, we need to manually check in this case that we don't
+ * overflow and try to read more than the EEPROM size.
+ * For 7000 family NICs, we supply the maximal size we can read, and
+ * the uCode fills the response with as much data as we can,
+ * without overflowing, so no check is needed.
+ */
+static int iwl_nvm_read_section(struct iwl_mvm *mvm, u16 section,
+				u8 *data)
+{
+	u16 length, offset = 0;
+	int ret;
+	bool old_eeprom = mvm->cfg->device_family != IWL_DEVICE_FAMILY_7000;
+
+	length = (iwlwifi_mod_params.amsdu_size_8K ? (8 * 1024) : (4 * 1024))
+		- sizeof(union iwl_nvm_access_cmd)
+		- sizeof(struct iwl_rx_packet);
+	/*
+	 * if length is greater than EEPROM size, truncate it because uCode
+	 * doesn't check it by itself, and exit the loop when reached.
+	 */
+	if (old_eeprom && length > mvm->cfg->base_params->eeprom_size)
+		length = mvm->cfg->base_params->eeprom_size;
+	ret = length;
+
+	/* Read the NVM until exhausted (reading less than requested) */
+	while (ret == length) {
+		ret = iwl_nvm_read_chunk(mvm, section, offset, length, data);
+		if (ret < 0) {
+			IWL_ERR(mvm,
+				"Cannot read NVM from section %d offset %d, length %d\n",
+				section, offset, length);
+			return ret;
+		}
+		offset += ret;
+		if (old_eeprom && offset == mvm->cfg->base_params->eeprom_size)
+			break;
+	}
+
+	IWL_INFO(mvm, "NVM section %d read completed\n", section);
+	return offset;
+}
+
+static struct iwl_nvm_data *
+iwl_parse_nvm_sections(struct iwl_mvm *mvm)
+{
+	struct iwl_nvm_section *sections = mvm->nvm_sections;
+	const __le16 *hw, *sw, *calib;
+
+	/* Checking for required sections */
+	if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
+	    !mvm->nvm_sections[NVM_SECTION_TYPE_HW].data) {
+		IWL_ERR(mvm, "Can't parse empty NVM sections\n");
+		return NULL;
+	}
+
+	if (WARN_ON(!mvm->cfg))
+		return NULL;
+
+	hw = (const __le16 *)sections[NVM_SECTION_TYPE_HW].data;
+	sw = (const __le16 *)sections[NVM_SECTION_TYPE_SW].data;
+	calib = (const __le16 *)sections[NVM_SECTION_TYPE_CALIBRATION].data;
+	return iwl_parse_nvm_data(mvm->trans->dev, mvm->cfg, hw, sw, calib);
+}
+
+int iwl_nvm_init(struct iwl_mvm *mvm)
+{
+	int ret, i, section;
+	u8 *nvm_buffer, *temp;
+
+	if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
+		/* TODO: find correct NVM max size for a section */
+		nvm_buffer = kmalloc(mvm->cfg->base_params->eeprom_size,
+				     GFP_KERNEL);
+		if (!nvm_buffer)
+			return -ENOMEM;
+		for (i = 0; i < ARRAY_SIZE(nvm_to_read); i++) {
+			section = nvm_to_read[i];
+			/* we override the constness for initial read */
+			ret = iwl_nvm_read_section(mvm, section, nvm_buffer);
+			if (ret < 0)
+				break;
+			temp = kmemdup(nvm_buffer, ret, GFP_KERNEL);
+			if (!temp) {
+				ret = -ENOMEM;
+				break;
+			}
+			mvm->nvm_sections[section].data = temp;
+			mvm->nvm_sections[section].length = ret;
+		}
+		kfree(nvm_buffer);
+		if (ret < 0)
+			return ret;
+	} else {
+		/* allocate eeprom */
+		mvm->eeprom_blob_size = mvm->cfg->base_params->eeprom_size;
+		IWL_DEBUG_EEPROM(mvm->trans->dev, "NVM size = %zd\n",
+				 mvm->eeprom_blob_size);
+		mvm->eeprom_blob = kzalloc(mvm->eeprom_blob_size, GFP_KERNEL);
+		if (!mvm->eeprom_blob)
+			return -ENOMEM;
+
+		ret = iwl_nvm_read_section(mvm, 0, mvm->eeprom_blob);
+		if (ret != mvm->eeprom_blob_size) {
+			IWL_ERR(mvm, "Read partial NVM %d/%zd\n",
+				ret, mvm->eeprom_blob_size);
+			kfree(mvm->eeprom_blob);
+			mvm->eeprom_blob = NULL;
+			return -EINVAL;
+		}
+	}
+
+	ret = 0;
+	if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000)
+		mvm->nvm_data = iwl_parse_nvm_sections(mvm);
+	else
+		mvm->nvm_data =
+			iwl_parse_eeprom_data(mvm->trans->dev,
+					      mvm->cfg,
+					      mvm->eeprom_blob,
+					      mvm->eeprom_blob_size);
+
+	if (!mvm->nvm_data) {
+		kfree(mvm->eeprom_blob);
+		mvm->eeprom_blob = NULL;
+		ret = -ENOMEM;
+	}
+
+	return ret;
+}