1 files changed, 346 insertions, 55 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/nvm.c b/drivers/net/wireless/iwlwifi/mvm/nvm.c
index b8ec02f89ac..808f78f6fbf 100644
--- a/drivers/net/wireless/iwlwifi/mvm/nvm.c
+++ b/drivers/net/wireless/iwlwifi/mvm/nvm.c
@@ -5,7 +5,7 @@
  *
  * GPL LICENSE SUMMARY
  *
- * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
+ * Copyright(c) 2012 - 2014 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
@@ -30,7 +30,7 @@
  *
  * BSD LICENSE
  *
- * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
+ * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -60,46 +60,70 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  *****************************************************************************/
+#include <linux/firmware.h>
 #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,
-};
-
 /* Default NVM size to read */
-#define IWL_NVM_DEFAULT_CHUNK_SIZE (2*1024);
+#define IWL_NVM_DEFAULT_CHUNK_SIZE (2*1024)
+#define IWL_MAX_NVM_SECTION_SIZE 7000
 
-static inline void iwl_nvm_fill_read(struct iwl_nvm_access_cmd *cmd,
-				     u16 offset, u16 length, u16 section)
+#define NVM_WRITE_OPCODE 1
+#define NVM_READ_OPCODE 0
+
+/* load nvm chunk response */
+enum {
+	READ_NVM_CHUNK_SUCCEED = 0,
+	READ_NVM_CHUNK_NOT_VALID_ADDRESS = 1
+};
+
+/*
+ * prepare the NVM host command w/ the pointers to the nvm buffer
+ * and send it to fw
+ */
+static int iwl_nvm_write_chunk(struct iwl_mvm *mvm, u16 section,
+			       u16 offset, u16 length, const u8 *data)
 {
-	cmd->offset = cpu_to_le16(offset);
-	cmd->length = cpu_to_le16(length);
-	cmd->type = cpu_to_le16(section);
+	struct iwl_nvm_access_cmd nvm_access_cmd = {
+		.offset = cpu_to_le16(offset),
+		.length = cpu_to_le16(length),
+		.type = cpu_to_le16(section),
+		.op_code = NVM_WRITE_OPCODE,
+	};
+	struct iwl_host_cmd cmd = {
+		.id = NVM_ACCESS_CMD,
+		.len = { sizeof(struct iwl_nvm_access_cmd), length },
+		.flags = CMD_SEND_IN_RFKILL,
+		.data = { &nvm_access_cmd, data },
+		/* data may come from vmalloc, so use _DUP */
+		.dataflags = { 0, IWL_HCMD_DFL_DUP },
+	};
+
+	return iwl_mvm_send_cmd(mvm, &cmd);
 }
 
 static int iwl_nvm_read_chunk(struct iwl_mvm *mvm, u16 section,
 			      u16 offset, u16 length, u8 *data)
 {
-	struct iwl_nvm_access_cmd nvm_access_cmd = {};
+	struct iwl_nvm_access_cmd nvm_access_cmd = {
+		.offset = cpu_to_le16(offset),
+		.length = cpu_to_le16(length),
+		.type = cpu_to_le16(section),
+		.op_code = NVM_READ_OPCODE,
+	};
 	struct 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,
+		.flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
 		.data = { &nvm_access_cmd, },
 	};
 	int ret, bytes_read, offset_read;
 	u8 *resp_data;
 
-	iwl_nvm_fill_read(&nvm_access_cmd, offset, length, section);
 	cmd.len[0] = sizeof(struct iwl_nvm_access_cmd);
 
 	ret = iwl_mvm_send_cmd(mvm, &cmd);
@@ -121,10 +145,26 @@ static int iwl_nvm_read_chunk(struct iwl_mvm *mvm, u16 section,
 	offset_read = le16_to_cpu(nvm_resp->offset);
 	resp_data = nvm_resp->data;
 	if (ret) {
-		IWL_ERR(mvm,
-			"NVM access command failed with status %d (device: %s)\n",
-			ret, mvm->cfg->name);
-		ret = -EINVAL;
+		if ((offset != 0) &&
+		    (ret == READ_NVM_CHUNK_NOT_VALID_ADDRESS)) {
+			/*
+			 * meaning of NOT_VALID_ADDRESS:
+			 * driver try to read chunk from address that is
+			 * multiple of 2K and got an error since addr is empty.
+			 * meaning of (offset != 0): driver already
+			 * read valid data from another chunk so this case
+			 * is not an error.
+			 */
+			IWL_DEBUG_EEPROM(mvm->trans->dev,
+					 "NVM access command failed on offset 0x%x since that section size is multiple 2K\n",
+					 offset);
+			ret = 0;
+		} else {
+			IWL_DEBUG_EEPROM(mvm->trans->dev,
+					 "NVM access command failed with status %d (device: %s)\n",
+					 ret, mvm->cfg->name);
+			ret = -EIO;
+		}
 		goto exit;
 	}
 
@@ -144,6 +184,30 @@ exit:
 	return ret;
 }
 
+static int iwl_nvm_write_section(struct iwl_mvm *mvm, u16 section,
+				 const u8 *data, u16 length)
+{
+	int offset = 0;
+
+	/* copy data in chunks of 2k (and remainder if any) */
+
+	while (offset < length) {
+		int chunk_size, ret;
+
+		chunk_size = min(IWL_NVM_DEFAULT_CHUNK_SIZE,
+				 length - offset);
+
+		ret = iwl_nvm_write_chunk(mvm, section, offset,
+					  chunk_size, data + offset);
+		if (ret < 0)
+			return ret;
+
+		offset += chunk_size;
+	}
+
+	return 0;
+}
+
 /*
  * Reads an NVM section completely.
  * NICs prior to 7000 family doesn't have a real NVM, but just read
@@ -169,15 +233,16 @@ static int iwl_nvm_read_section(struct iwl_mvm *mvm, u16 section,
 	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);
+			IWL_DEBUG_EEPROM(mvm->trans->dev,
+					 "Cannot read NVM from section %d offset %d, length %d\n",
+					 section, offset, length);
 			return ret;
 		}
 		offset += ret;
 	}
 
-	IWL_INFO(mvm, "NVM section %d read completed\n", section);
+	IWL_DEBUG_EEPROM(mvm->trans->dev,
+			 "NVM section %d read completed\n", section);
 	return offset;
 }
 
@@ -185,54 +250,280 @@ 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;
+	const __le16 *hw, *sw, *calib, *regulatory, *mac_override;
 
 	/* 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 (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) {
+		if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
+		    !mvm->nvm_sections[mvm->cfg->nvm_hw_section_num].data) {
+			IWL_ERR(mvm, "Can't parse empty NVM sections\n");
+			return NULL;
+		}
+	} else {
+		/* SW and REGULATORY sections are mandatory */
+		if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
+		    !mvm->nvm_sections[NVM_SECTION_TYPE_REGULATORY].data) {
+			IWL_ERR(mvm,
+				"Can't parse empty family 8000 NVM sections\n");
+			return NULL;
+		}
+		/* MAC_OVERRIDE or at least HW section must exist */
+		if (!mvm->nvm_sections[mvm->cfg->nvm_hw_section_num].data &&
+		    !mvm->nvm_sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data) {
+			IWL_ERR(mvm,
+				"Can't parse mac_address, empty sections\n");
+			return NULL;
+		}
 	}
 
 	if (WARN_ON(!mvm->cfg))
 		return NULL;
 
-	hw = (const __le16 *)sections[NVM_SECTION_TYPE_HW].data;
+	hw = (const __le16 *)sections[mvm->cfg->nvm_hw_section_num].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);
+	regulatory = (const __le16 *)sections[NVM_SECTION_TYPE_REGULATORY].data;
+	mac_override =
+		(const __le16 *)sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data;
+
+	return iwl_parse_nvm_data(mvm->trans->dev, mvm->cfg, hw, sw, calib,
+				  regulatory, mac_override,
+				  mvm->fw->valid_tx_ant,
+				  mvm->fw->valid_rx_ant);
 }
 
-int iwl_nvm_init(struct iwl_mvm *mvm)
+#define MAX_NVM_FILE_LEN	16384
+
+/*
+ * Reads external NVM from a file into mvm->nvm_sections
+ *
+ * HOW TO CREATE THE NVM FILE FORMAT:
+ * ------------------------------
+ * 1. create hex file, format:
+ *      3800 -> header
+ *      0000 -> header
+ *      5a40 -> data
+ *
+ *   rev - 6 bit (word1)
+ *   len - 10 bit (word1)
+ *   id - 4 bit (word2)
+ *   rsv - 12 bit (word2)
+ *
+ * 2. flip 8bits with 8 bits per line to get the right NVM file format
+ *
+ * 3. create binary file from the hex file
+ *
+ * 4. save as "iNVM_xxx.bin" under /lib/firmware
+ */
+static int iwl_mvm_read_external_nvm(struct iwl_mvm *mvm)
 {
-	int ret, i, section;
-	u8 *nvm_buffer, *temp;
+	int ret, section_size;
+	u16 section_id;
+	const struct firmware *fw_entry;
+	const struct {
+		__le16 word1;
+		__le16 word2;
+		u8 data[];
+	} *file_sec;
+	const u8 *eof, *temp;
 
-	/* 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)
+#define NVM_WORD1_LEN(x) (8 * (x & 0x03FF))
+#define NVM_WORD2_ID(x) (x >> 12)
+#define NVM_WORD2_LEN_FAMILY_8000(x) (2 * ((x & 0xFF) << 8 | x >> 8))
+#define NVM_WORD1_ID_FAMILY_8000(x) (x >> 4)
+
+	IWL_DEBUG_EEPROM(mvm->trans->dev, "Read from external NVM\n");
+
+	/*
+	 * Obtain NVM image via request_firmware. Since we already used
+	 * request_firmware_nowait() for the firmware binary load and only
+	 * get here after that we assume the NVM request can be satisfied
+	 * synchronously.
+	 */
+	ret = request_firmware(&fw_entry, mvm->nvm_file_name,
+			       mvm->trans->dev);
+	if (ret) {
+		IWL_ERR(mvm, "ERROR: %s isn't available %d\n",
+			mvm->nvm_file_name, ret);
+		return ret;
+	}
+
+	IWL_INFO(mvm, "Loaded NVM file %s (%zu bytes)\n",
+		 mvm->nvm_file_name, fw_entry->size);
+
+	if (fw_entry->size < sizeof(*file_sec)) {
+		IWL_ERR(mvm, "NVM file too small\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (fw_entry->size > MAX_NVM_FILE_LEN) {
+		IWL_ERR(mvm, "NVM file too large\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	eof = fw_entry->data + fw_entry->size;
+
+	file_sec = (void *)fw_entry->data;
+
+	while (true) {
+		if (file_sec->data > eof) {
+			IWL_ERR(mvm,
+				"ERROR - NVM file too short for section header\n");
+			ret = -EINVAL;
+			break;
+		}
+
+		/* check for EOF marker */
+		if (!file_sec->word1 && !file_sec->word2) {
+			ret = 0;
+			break;
+		}
+
+		if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) {
+			section_size =
+				2 * NVM_WORD1_LEN(le16_to_cpu(file_sec->word1));
+			section_id = NVM_WORD2_ID(le16_to_cpu(file_sec->word2));
+		} else {
+			section_size = 2 * NVM_WORD2_LEN_FAMILY_8000(
+						le16_to_cpu(file_sec->word2));
+			section_id = NVM_WORD1_ID_FAMILY_8000(
+						le16_to_cpu(file_sec->word1));
+		}
+
+		if (section_size > IWL_MAX_NVM_SECTION_SIZE) {
+			IWL_ERR(mvm, "ERROR - section too large (%d)\n",
+				section_size);
+			ret = -EINVAL;
 			break;
-		temp = kmemdup(nvm_buffer, ret, GFP_KERNEL);
+		}
+
+		if (!section_size) {
+			IWL_ERR(mvm, "ERROR - section empty\n");
+			ret = -EINVAL;
+			break;
+		}
+
+		if (file_sec->data + section_size > eof) {
+			IWL_ERR(mvm,
+				"ERROR - NVM file too short for section (%d bytes)\n",
+				section_size);
+			ret = -EINVAL;
+			break;
+		}
+
+		if (WARN(section_id >= NVM_MAX_NUM_SECTIONS,
+			 "Invalid NVM section ID %d\n", section_id)) {
+			ret = -EINVAL;
+			break;
+		}
+
+		temp = kmemdup(file_sec->data, section_size, GFP_KERNEL);
 		if (!temp) {
 			ret = -ENOMEM;
 			break;
 		}
-		mvm->nvm_sections[section].data = temp;
-		mvm->nvm_sections[section].length = ret;
+		mvm->nvm_sections[section_id].data = temp;
+		mvm->nvm_sections[section_id].length = section_size;
+
+		/* advance to the next section */
+		file_sec = (void *)(file_sec->data + section_size);
+	}
+out:
+	release_firmware(fw_entry);
+	return ret;
+}
+
+/* Loads the NVM data stored in mvm->nvm_sections into the NIC */
+int iwl_mvm_load_nvm_to_nic(struct iwl_mvm *mvm)
+{
+	int i, ret = 0;
+	struct iwl_nvm_section *sections = mvm->nvm_sections;
+
+	IWL_DEBUG_EEPROM(mvm->trans->dev, "'Write to NVM\n");
+
+	for (i = 0; i < ARRAY_SIZE(mvm->nvm_sections); i++) {
+		if (!mvm->nvm_sections[i].data || !mvm->nvm_sections[i].length)
+			continue;
+		ret = iwl_nvm_write_section(mvm, i, sections[i].data,
+					    sections[i].length);
+		if (ret < 0) {
+			IWL_ERR(mvm, "iwl_mvm_send_cmd failed: %d\n", ret);
+			break;
+		}
 	}
-	kfree(nvm_buffer);
-	if (ret < 0)
-		return ret;
+	return ret;
+}
 
-	ret = 0;
+int iwl_nvm_init(struct iwl_mvm *mvm, bool read_nvm_from_nic)
+{
+	int ret, section;
+	u8 *nvm_buffer, *temp;
+
+	if (WARN_ON_ONCE(mvm->cfg->nvm_hw_section_num >= NVM_MAX_NUM_SECTIONS))
+		return -EINVAL;
+
+	/* load NVM values from nic */
+	if (read_nvm_from_nic) {
+		/* Read From FW NVM */
+		IWL_DEBUG_EEPROM(mvm->trans->dev, "Read from NVM\n");
+
+		nvm_buffer = kmalloc(mvm->cfg->base_params->eeprom_size,
+				     GFP_KERNEL);
+		if (!nvm_buffer)
+			return -ENOMEM;
+		for (section = 0; section < NVM_MAX_NUM_SECTIONS; section++) {
+			/* we override the constness for initial read */
+			ret = iwl_nvm_read_section(mvm, section, nvm_buffer);
+			if (ret < 0)
+				continue;
+			temp = kmemdup(nvm_buffer, ret, GFP_KERNEL);
+			if (!temp) {
+				ret = -ENOMEM;
+				break;
+			}
+			mvm->nvm_sections[section].data = temp;
+			mvm->nvm_sections[section].length = ret;
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+			switch (section) {
+			case NVM_SECTION_TYPE_SW:
+				mvm->nvm_sw_blob.data = temp;
+				mvm->nvm_sw_blob.size  = ret;
+				break;
+			case NVM_SECTION_TYPE_CALIBRATION:
+				mvm->nvm_calib_blob.data = temp;
+				mvm->nvm_calib_blob.size  = ret;
+				break;
+			case NVM_SECTION_TYPE_PRODUCTION:
+				mvm->nvm_prod_blob.data = temp;
+				mvm->nvm_prod_blob.size  = ret;
+				break;
+			default:
+				if (section == mvm->cfg->nvm_hw_section_num) {
+					mvm->nvm_hw_blob.data = temp;
+					mvm->nvm_hw_blob.size = ret;
+					break;
+				}
+			}
+#endif
+		}
+		kfree(nvm_buffer);
+	}
+
+	/* load external NVM if configured */
+	if (mvm->nvm_file_name) {
+		/* move to External NVM flow */
+		ret = iwl_mvm_read_external_nvm(mvm);
+		if (ret)
+			return ret;
+	}
+
+	/* parse the relevant nvm sections */
 	mvm->nvm_data = iwl_parse_nvm_sections(mvm);
+	if (!mvm->nvm_data)
+		return -ENODATA;
 
-	return ret;
+	return 0;
 }