iwlwifi: add the MVM driver

Newer firmware revisions have a completely new
firmware API. This is the new driver for this
new API.

I've listed the people who directly contributed
code, but many others from various teams have
contributed in other ways.

Cc: Alexander Bondar <alexander.bondar@intel.com>
Cc: Amit Beka <amit.beka@intel.com>
Cc: Amnon Paz <amnonx.paz@intel.com>
Cc: Assaf Krauss <assaf.krauss@intel.com>
Cc: David Spinadel <david.spinadel@intel.com>
Cc: Dor Shaish <dor.shaish@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Eytan Lifshitz <eytan.lifshitz@intel.com>
Cc: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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;
+}