iwlwifi: mvm: add fw runtime stack to dump data

The allocation of the DCCM between the data and the stack
can theoretically change without notice to the driver, but
the total size is HW-fixed. Since the stack CCM (runtime
stack) has also data important to the FW - this patch allows
pulling the whole DCCM in one piece and adds it to the dump
data.

If the size isn't known - just use the data part of the
DCCM as it appears in the FW TLVs.

Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

4 files changed, 44 insertions, 6 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-7000.c b/drivers/net/wireless/iwlwifi/iwl-7000.c
index e5be2d21868f..9e76799c4750 100644
--- a/drivers/net/wireless/iwlwifi/iwl-7000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-7000.c
@@ -92,6 +92,12 @@
 #define IWL7265D_NVM_VERSION            0x0c11
 #define IWL7265_TX_POWER_VERSION        0xffff /* meaningless */
 
+/* DCCM offsets and lengths */
+#define IWL7000_DCCM_OFFSET             0x800000
+#define IWL7260_DCCM_LEN                0x14000
+#define IWL3160_DCCM_LEN                0x10000
+#define IWL7265_DCCM_LEN                0x17A00
+
 #define IWL7260_FW_PRE "iwlwifi-7260-"
 #define IWL7260_MODULE_FIRMWARE(api) IWL7260_FW_PRE __stringify(api) ".ucode"
 
@@ -138,7 +144,8 @@ static const struct iwl_ht_params iwl7000_ht_params = {
         .led_mode = IWL_LED_RF_STATE,                           \
         .nvm_hw_section_num = NVM_HW_SECTION_NUM_FAMILY_7000,   \
         .non_shared_ant = ANT_A,                                \
-        .max_ht_ampdu_exponent = IEEE80211_HT_MAX_AMPDU_64K
+        .max_ht_ampdu_exponent = IEEE80211_HT_MAX_AMPDU_64K,    \
+        .dccm_offset = IWL7000_DCCM_OFFSET
 
 const struct iwl_cfg iwl7260_2ac_cfg = {
         .name = "Intel(R) Dual Band Wireless AC 7260",
@@ -149,6 +156,7 @@ const struct iwl_cfg iwl7260_2ac_cfg = {
         .nvm_calib_ver = IWL7260_TX_POWER_VERSION,
         .host_interrupt_operation_mode = true,
         .lp_xtal_workaround = true,
+        .dccm_len = IWL7260_DCCM_LEN,
 };
 
 const struct iwl_cfg iwl7260_2ac_cfg_high_temp = {
@@ -161,6 +169,7 @@ const struct iwl_cfg iwl7260_2ac_cfg_high_temp = {
         .high_temp = true,
         .host_interrupt_operation_mode = true,
         .lp_xtal_workaround = true,
+        .dccm_len = IWL7260_DCCM_LEN,
 };
 
 const struct iwl_cfg iwl7260_2n_cfg = {
@@ -172,6 +181,7 @@ const struct iwl_cfg iwl7260_2n_cfg = {
         .nvm_calib_ver = IWL7260_TX_POWER_VERSION,
         .host_interrupt_operation_mode = true,
         .lp_xtal_workaround = true,
+        .dccm_len = IWL7260_DCCM_LEN,
 };
 
 const struct iwl_cfg iwl7260_n_cfg = {
@@ -183,6 +193,7 @@ const struct iwl_cfg iwl7260_n_cfg = {
         .nvm_calib_ver = IWL7260_TX_POWER_VERSION,
         .host_interrupt_operation_mode = true,
         .lp_xtal_workaround = true,
+        .dccm_len = IWL7260_DCCM_LEN,
 };
 
 const struct iwl_cfg iwl3160_2ac_cfg = {
@@ -193,6 +204,7 @@ const struct iwl_cfg iwl3160_2ac_cfg = {
         .nvm_ver = IWL3160_NVM_VERSION,
         .nvm_calib_ver = IWL3160_TX_POWER_VERSION,
         .host_interrupt_operation_mode = true,
+        .dccm_len = IWL3160_DCCM_LEN,
 };
 
 const struct iwl_cfg iwl3160_2n_cfg = {
@@ -203,6 +215,7 @@ const struct iwl_cfg iwl3160_2n_cfg = {
         .nvm_ver = IWL3160_NVM_VERSION,
         .nvm_calib_ver = IWL3160_TX_POWER_VERSION,
         .host_interrupt_operation_mode = true,
+        .dccm_len = IWL3160_DCCM_LEN,
 };
 
 const struct iwl_cfg iwl3160_n_cfg = {
@@ -213,6 +226,7 @@ const struct iwl_cfg iwl3160_n_cfg = {
         .nvm_ver = IWL3160_NVM_VERSION,
         .nvm_calib_ver = IWL3160_TX_POWER_VERSION,
         .host_interrupt_operation_mode = true,
+        .dccm_len = IWL3160_DCCM_LEN,
 };
 
 static const struct iwl_pwr_tx_backoff iwl7265_pwr_tx_backoffs[] = {
@@ -240,6 +254,7 @@ const struct iwl_cfg iwl3165_2ac_cfg = {
         .nvm_ver = IWL3165_NVM_VERSION,
         .nvm_calib_ver = IWL3165_TX_POWER_VERSION,
         .pwr_tx_backoffs = iwl7265_pwr_tx_backoffs,
+        .dccm_len = IWL7265_DCCM_LEN,
 };
 
 const struct iwl_cfg iwl7265_2ac_cfg = {
@@ -250,6 +265,7 @@ const struct iwl_cfg iwl7265_2ac_cfg = {
         .nvm_ver = IWL7265_NVM_VERSION,
         .nvm_calib_ver = IWL7265_TX_POWER_VERSION,
         .pwr_tx_backoffs = iwl7265_pwr_tx_backoffs,
+        .dccm_len = IWL7265_DCCM_LEN,
 };
 
 const struct iwl_cfg iwl7265_2n_cfg = {
@@ -260,6 +276,7 @@ const struct iwl_cfg iwl7265_2n_cfg = {
         .nvm_ver = IWL7265_NVM_VERSION,
         .nvm_calib_ver = IWL7265_TX_POWER_VERSION,
         .pwr_tx_backoffs = iwl7265_pwr_tx_backoffs,
+        .dccm_len = IWL7265_DCCM_LEN,
 };
 
 const struct iwl_cfg iwl7265_n_cfg = {
@@ -270,6 +287,7 @@ const struct iwl_cfg iwl7265_n_cfg = {
         .nvm_ver = IWL7265_NVM_VERSION,
         .nvm_calib_ver = IWL7265_TX_POWER_VERSION,
         .pwr_tx_backoffs = iwl7265_pwr_tx_backoffs,
+        .dccm_len = IWL7265_DCCM_LEN,
 };
 
 const struct iwl_cfg iwl7265d_2ac_cfg = {
@@ -280,6 +298,7 @@ const struct iwl_cfg iwl7265d_2ac_cfg = {
         .nvm_ver = IWL7265D_NVM_VERSION,
         .nvm_calib_ver = IWL7265_TX_POWER_VERSION,
         .pwr_tx_backoffs = iwl7265_pwr_tx_backoffs,
+        .dccm_len = IWL7265_DCCM_LEN,
 };
 
 const struct iwl_cfg iwl7265d_2n_cfg = {
@@ -290,6 +309,7 @@ const struct iwl_cfg iwl7265d_2n_cfg = {
         .nvm_ver = IWL7265D_NVM_VERSION,
         .nvm_calib_ver = IWL7265_TX_POWER_VERSION,
         .pwr_tx_backoffs = iwl7265_pwr_tx_backoffs,
+        .dccm_len = IWL7265_DCCM_LEN,
 };
 
 const struct iwl_cfg iwl7265d_n_cfg = {
@@ -300,6 +320,7 @@ const struct iwl_cfg iwl7265d_n_cfg = {
         .nvm_ver = IWL7265D_NVM_VERSION,
         .nvm_calib_ver = IWL7265_TX_POWER_VERSION,
         .pwr_tx_backoffs = iwl7265_pwr_tx_backoffs,
+        .dccm_len = IWL7265_DCCM_LEN,
 };
 
 MODULE_FIRMWARE(IWL7260_MODULE_FIRMWARE(IWL7260_UCODE_API_OK));
diff --git a/drivers/net/wireless/iwlwifi/iwl-8000.c b/drivers/net/wireless/iwlwifi/iwl-8000.c
index bf0a95cb7153..6c5c55856a35 100644
--- a/drivers/net/wireless/iwlwifi/iwl-8000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-8000.c
@@ -81,6 +81,10 @@
 #define IWL8000_NVM_VERSION             0x0a1d
 #define IWL8000_TX_POWER_VERSION        0xffff /* meaningless */
 
+/* DCCM offsets and lengths */
+#define IWL8260_DCCM_OFFSET             0x800000
+#define IWL8260_DCCM_LEN                0x18000
+
 #define IWL8000_FW_PRE "iwlwifi-8000"
 #define IWL8000_MODULE_FIRMWARE(api) \
         IWL8000_FW_PRE "-" __stringify(api) ".ucode"
@@ -124,7 +128,9 @@ static const struct iwl_ht_params iwl8000_ht_params = {
         .led_mode = IWL_LED_RF_STATE,                           \
         .nvm_hw_section_num = NVM_HW_SECTION_NUM_FAMILY_8000,   \
         .d0i3 = true,                                           \
-        .non_shared_ant = ANT_A
+        .non_shared_ant = ANT_A,                                \
+        .dccm_offset = IWL8260_DCCM_OFFSET,                     \
+        .dccm_len = IWL8260_DCCM_LEN
 
 const struct iwl_cfg iwl8260_2n_cfg = {
         .name = "Intel(R) Dual Band Wireless N 8260",
diff --git a/drivers/net/wireless/iwlwifi/iwl-config.h b/drivers/net/wireless/iwlwifi/iwl-config.h
index 3a4b9c7fc083..31c67dfabf55 100644
--- a/drivers/net/wireless/iwlwifi/iwl-config.h
+++ b/drivers/net/wireless/iwlwifi/iwl-config.h
@@ -261,6 +261,8 @@ struct iwl_pwr_tx_backoff {
  *      station can receive in HT
  * @max_vht_ampdu_exponent: the exponent of the max length of A-MPDU that the
  *      station can receive in VHT
+ * @dccm_offset: offset from which DCCM begins
+ * @dccm_len: length of DCCM (including runtime stack CCM)
  *
  * We enable the driver to be backward compatible wrt. hardware features.
  * API differences in uCode shouldn't be handled here but through TLVs
@@ -303,6 +305,8 @@ struct iwl_cfg {
         unsigned int max_tx_agg_size;
         unsigned int max_ht_ampdu_exponent;
         unsigned int max_vht_ampdu_exponent;
+        const u32 dccm_offset;
+        const u32 dccm_len;
 };
 
 /*
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index 31a5b3f4266c..2d62b5617a56 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -767,7 +767,6 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
         struct iwl_fw_error_dump_data *dump_data;
         struct iwl_fw_error_dump_info *dump_info;
         struct iwl_mvm_dump_ptrs *fw_error_dump;
-        const struct fw_img *img;
         u32 sram_len, sram_ofs;
         u32 file_len, rxf_len;
         unsigned long flags;
@@ -779,9 +778,17 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
         if (!fw_error_dump)
                 return;
 
-        img = &mvm->fw->img[mvm->cur_ucode];
-        sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
-        sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
+        /* SRAM - include stack CCM if driver knows the values for it */
+        if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
+                const struct fw_img *img;
+
+                img = &mvm->fw->img[mvm->cur_ucode];
+                sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
+                sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
+        } else {
+                sram_ofs = mvm->cfg->dccm_offset;
+                sram_len = mvm->cfg->dccm_len;
+        }
 
         /* reading buffer size */
         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);