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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/******************************************************************************
*
* Copyright(c) 2020 Intel Corporation
*
*****************************************************************************/
#include "iwl-drv.h"
#include "pnvm.h"
#include "iwl-prph.h"
#include "iwl-io.h"
#include "fw/api/commands.h"
#include "fw/api/nvm-reg.h"
#include "fw/api/alive.h"
struct iwl_pnvm_section {
__le32 offset;
const u8 data[];
} __packed;
static bool iwl_pnvm_complete_fn(struct iwl_notif_wait_data *notif_wait,
struct iwl_rx_packet *pkt, void *data)
{
struct iwl_trans *trans = (struct iwl_trans *)data;
struct iwl_pnvm_init_complete_ntfy *pnvm_ntf = (void *)pkt->data;
IWL_DEBUG_FW(trans,
"PNVM complete notification received with status %d\n",
le32_to_cpu(pnvm_ntf->status));
return true;
}
static int iwl_pnvm_handle_section(struct iwl_trans *trans, const u8 *data,
size_t len)
{
struct iwl_ucode_tlv *tlv;
u32 sha1 = 0;
u16 mac_type = 0, rf_id = 0;
u8 *pnvm_data = NULL, *tmp;
bool hw_match = false;
u32 size = 0;
int ret;
IWL_DEBUG_FW(trans, "Handling PNVM section\n");
while (len >= sizeof(*tlv)) {
u32 tlv_len, tlv_type;
len -= sizeof(*tlv);
tlv = (void *)data;
tlv_len = le32_to_cpu(tlv->length);
tlv_type = le32_to_cpu(tlv->type);
if (len < tlv_len) {
IWL_ERR(trans, "invalid TLV len: %zd/%u\n",
len, tlv_len);
ret = -EINVAL;
goto out;
}
data += sizeof(*tlv);
switch (tlv_type) {
case IWL_UCODE_TLV_PNVM_VERSION:
if (tlv_len < sizeof(__le32)) {
IWL_DEBUG_FW(trans,
"Invalid size for IWL_UCODE_TLV_PNVM_VERSION (expected %zd, got %d)\n",
sizeof(__le32), tlv_len);
break;
}
sha1 = le32_to_cpup((__le32 *)data);
IWL_DEBUG_FW(trans,
"Got IWL_UCODE_TLV_PNVM_VERSION %0x\n",
sha1);
break;
case IWL_UCODE_TLV_HW_TYPE:
if (tlv_len < 2 * sizeof(__le16)) {
IWL_DEBUG_FW(trans,
"Invalid size for IWL_UCODE_TLV_HW_TYPE (expected %zd, got %d)\n",
2 * sizeof(__le16), tlv_len);
break;
}
if (hw_match)
break;
mac_type = le16_to_cpup((__le16 *)data);
rf_id = le16_to_cpup((__le16 *)(data + sizeof(__le16)));
IWL_DEBUG_FW(trans,
"Got IWL_UCODE_TLV_HW_TYPE mac_type 0x%0x rf_id 0x%0x\n",
mac_type, rf_id);
if (mac_type == CSR_HW_REV_TYPE(trans->hw_rev) &&
rf_id == CSR_HW_RFID_TYPE(trans->hw_rf_id))
hw_match = true;
break;
case IWL_UCODE_TLV_SEC_RT: {
struct iwl_pnvm_section *section = (void *)data;
u32 data_len = tlv_len - sizeof(*section);
IWL_DEBUG_FW(trans,
"Got IWL_UCODE_TLV_SEC_RT len %d\n",
tlv_len);
/* TODO: remove, this is a deprecated separator */
if (le32_to_cpup((__le32 *)data) == 0xddddeeee) {
IWL_DEBUG_FW(trans, "Ignoring separator.\n");
break;
}
IWL_DEBUG_FW(trans, "Adding data (size %d)\n",
data_len);
tmp = krealloc(pnvm_data, size + data_len, GFP_KERNEL);
if (!tmp) {
IWL_DEBUG_FW(trans,
"Couldn't allocate (more) pnvm_data\n");
ret = -ENOMEM;
goto out;
}
pnvm_data = tmp;
memcpy(pnvm_data + size, section->data, data_len);
size += data_len;
break;
}
case IWL_UCODE_TLV_PNVM_SKU:
IWL_DEBUG_FW(trans,
"New PNVM section started, stop parsing.\n");
goto done;
default:
IWL_DEBUG_FW(trans, "Found TLV 0x%0x, len %d\n",
tlv_type, tlv_len);
break;
}
len -= ALIGN(tlv_len, 4);
data += ALIGN(tlv_len, 4);
}
done:
if (!hw_match) {
IWL_DEBUG_FW(trans,
"HW mismatch, skipping PNVM section (need mac_type 0x%x rf_id 0x%x)\n",
CSR_HW_REV_TYPE(trans->hw_rev),
CSR_HW_RFID_TYPE(trans->hw_rf_id));
ret = -ENOENT;
goto out;
}
if (!size) {
IWL_DEBUG_FW(trans, "Empty PNVM, skipping.\n");
ret = -ENOENT;
goto out;
}
IWL_INFO(trans, "loaded PNVM version 0x%0x\n", sha1);
ret = iwl_trans_set_pnvm(trans, pnvm_data, size);
out:
kfree(pnvm_data);
return ret;
}
static int iwl_pnvm_parse(struct iwl_trans *trans, const u8 *data,
size_t len)
{
struct iwl_ucode_tlv *tlv;
IWL_DEBUG_FW(trans, "Parsing PNVM file\n");
while (len >= sizeof(*tlv)) {
u32 tlv_len, tlv_type;
len -= sizeof(*tlv);
tlv = (void *)data;
tlv_len = le32_to_cpu(tlv->length);
tlv_type = le32_to_cpu(tlv->type);
if (len < tlv_len) {
IWL_ERR(trans, "invalid TLV len: %zd/%u\n",
len, tlv_len);
return -EINVAL;
}
if (tlv_type == IWL_UCODE_TLV_PNVM_SKU) {
struct iwl_sku_id *sku_id =
(void *)(data + sizeof(*tlv));
IWL_DEBUG_FW(trans,
"Got IWL_UCODE_TLV_PNVM_SKU len %d\n",
tlv_len);
IWL_DEBUG_FW(trans, "sku_id 0x%0x 0x%0x 0x%0x\n",
le32_to_cpu(sku_id->data[0]),
le32_to_cpu(sku_id->data[1]),
le32_to_cpu(sku_id->data[2]));
data += sizeof(*tlv) + ALIGN(tlv_len, 4);
len -= ALIGN(tlv_len, 4);
if (trans->sku_id[0] == le32_to_cpu(sku_id->data[0]) &&
trans->sku_id[1] == le32_to_cpu(sku_id->data[1]) &&
trans->sku_id[2] == le32_to_cpu(sku_id->data[2])) {
int ret;
ret = iwl_pnvm_handle_section(trans, data, len);
if (!ret)
return 0;
} else {
IWL_DEBUG_FW(trans, "SKU ID didn't match!\n");
}
} else {
data += sizeof(*tlv) + ALIGN(tlv_len, 4);
len -= ALIGN(tlv_len, 4);
}
}
return -ENOENT;
}
int iwl_pnvm_load(struct iwl_trans *trans,
struct iwl_notif_wait_data *notif_wait)
{
struct iwl_notification_wait pnvm_wait;
static const u16 ntf_cmds[] = { WIDE_ID(REGULATORY_AND_NVM_GROUP,
PNVM_INIT_COMPLETE_NTFY) };
int ret;
/* if the SKU_ID is empty, there's nothing to do */
if (!trans->sku_id[0] && !trans->sku_id[1] && !trans->sku_id[2])
return 0;
/* load from disk only if we haven't done it (or tried) before */
if (!trans->pnvm_loaded) {
const struct firmware *pnvm;
char pnvm_name[64];
/*
* The prefix unfortunately includes a hyphen at the end, so
* don't add the dot here...
*/
snprintf(pnvm_name, sizeof(pnvm_name), "%spnvm",
trans->cfg->fw_name_pre);
/* ...but replace the hyphen with the dot here. */
if (strlen(trans->cfg->fw_name_pre) < sizeof(pnvm_name))
pnvm_name[strlen(trans->cfg->fw_name_pre) - 1] = '.';
ret = firmware_request_nowarn(&pnvm, pnvm_name, trans->dev);
if (ret) {
IWL_DEBUG_FW(trans, "PNVM file %s not found %d\n",
pnvm_name, ret);
/*
* Pretend we've loaded it - at least we've tried and
* couldn't load it at all, so there's no point in
* trying again over and over.
*/
trans->pnvm_loaded = true;
} else {
iwl_pnvm_parse(trans, pnvm->data, pnvm->size);
release_firmware(pnvm);
}
} else {
/* if we already loaded, we need to set it again */
ret = iwl_trans_set_pnvm(trans, NULL, 0);
if (ret)
return ret;
}
iwl_init_notification_wait(notif_wait, &pnvm_wait,
ntf_cmds, ARRAY_SIZE(ntf_cmds),
iwl_pnvm_complete_fn, trans);
/* kick the doorbell */
iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
UREG_DOORBELL_TO_ISR6_PNVM);
return iwl_wait_notification(notif_wait, &pnvm_wait,
MVM_UCODE_PNVM_TIMEOUT);
}
IWL_EXPORT_SYMBOL(iwl_pnvm_load);
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