iwlwifi: mvm: dump more registers upon error

These registers can help to debug PHY issues. Since this
adds a significant amount of work to the debug collection
phase, dump the periphery registers only if the firmware
is stopped.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c
index a6985da..29d54ec 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c
@@ -349,6 +349,7 @@ static const struct {
        { .start = 0x00a04560, .end = 0x00a0457c },
        { .start = 0x00a04590, .end = 0x00a04598 },
        { .start = 0x00a045c0, .end = 0x00a045f4 },
+       { .start = 0x00a44000, .end = 0x00a7bf80 },
 };
 
 static u32 iwl_dump_prph(struct iwl_trans *trans,
@@ -400,7 +401,7 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
        struct iwl_fw_error_dump_trigger_desc *dump_trig;
        struct iwl_mvm_dump_ptrs *fw_error_dump;
        u32 sram_len, sram_ofs;
-       u32 file_len, fifo_data_len = 0;
+       u32 file_len, fifo_data_len = 0, prph_len = 0;
        u32 smem_len = mvm->cfg->smem_len;
        u32 sram2_len = mvm->cfg->dccm2_len;
        bool monitor_dump_only = false;
@@ -460,12 +461,24 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
                                         sizeof(*dump_data) +
                                         sizeof(struct iwl_fw_error_dump_fifo);
                }
+
+               /* Make room for PRPH registers */
+               for (i = 0; i < ARRAY_SIZE(iwl_prph_dump_addr); i++) {
+                       /* The range includes both boundaries */
+                       int num_bytes_in_chunk = iwl_prph_dump_addr[i].end -
+                               iwl_prph_dump_addr[i].start + 4;
+
+                       prph_len += sizeof(*dump_data) +
+                               sizeof(struct iwl_fw_error_dump_prph) +
+                               num_bytes_in_chunk;
+               }
        }
 
        file_len = sizeof(*dump_file) +
                   sizeof(*dump_data) * 2 +
                   sram_len + sizeof(*dump_mem) +
                   fifo_data_len +
+                  prph_len +
                   sizeof(*dump_info);
 
        /* Make room for the SMEM, if it exists */
@@ -489,17 +502,6 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
                           sizeof(*dump_info);
        }
 
-       /* Make room for PRPH registers */
-       for (i = 0; i < ARRAY_SIZE(iwl_prph_dump_addr); i++) {
-               /* The range includes both boundaries */
-               int num_bytes_in_chunk = iwl_prph_dump_addr[i].end -
-                       iwl_prph_dump_addr[i].start + 4;
-
-               file_len += sizeof(*dump_data) +
-                       sizeof(struct iwl_fw_error_dump_prph) +
-                       num_bytes_in_chunk;
-       }
-
        /*
         * In 8000 HW family B-step include the ICCM (which resides separately)
         */
@@ -625,7 +627,8 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
        }
 
        dump_data = iwl_fw_error_next_data(dump_data);
-       iwl_dump_prph(mvm->trans, &dump_data);
+       if (prph_len)
+               iwl_dump_prph(mvm->trans, &dump_data);
 
 dump_trans_data:
        fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans,