iwlwifi: add dump of RFH

Add support of dumping new RFH instead of FH registers.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-io.c b/drivers/net/wireless/intel/iwlwifi/iwl-io.c
index 32c8f84..d8b4306 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/iwl-io.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-io.c
@@ -1,7 +1,7 @@
 /******************************************************************************
  *
  * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
- * Copyright(c) 2015 Intel Deutschland GmbH
+ * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
  *
  * Portions of this file are derived from the ipw3945 project.
  *
@@ -228,9 +228,117 @@ void iwl_force_nmi(struct iwl_trans *trans)
 }
 IWL_EXPORT_SYMBOL(iwl_force_nmi);
 
-static const char *get_fh_string(int cmd)
+static const char *get_rfh_string(int cmd)
 {
 #define IWL_CMD(x) case x: return #x
+#define IWL_CMD_MQ(arg, reg, q) { if (arg == reg(q)) return #reg; }
+
+       int i;
+
+       for (i = 0; i < IWL_MAX_RX_HW_QUEUES; i++) {
+               IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_BA_LSB, i);
+               IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_WIDX, i);
+               IWL_CMD_MQ(cmd, RFH_Q_FRBDCB_RIDX, i);
+               IWL_CMD_MQ(cmd, RFH_Q_URBD_STTS_WPTR_LSB, i);
+       };
+
+       switch (cmd) {
+       IWL_CMD(RFH_RXF_DMA_CFG);
+       IWL_CMD(RFH_GEN_CFG);
+       IWL_CMD(RFH_GEN_STATUS);
+       IWL_CMD(FH_TSSR_TX_STATUS_REG);
+       IWL_CMD(FH_TSSR_TX_ERROR_REG);
+       default:
+               return "UNKNOWN";
+       }
+#undef IWL_CMD_MQ
+}
+
+struct reg {
+       u32 addr;
+       bool is64;
+};
+
+static int iwl_dump_rfh(struct iwl_trans *trans, char **buf)
+{
+       int i, q;
+       int num_q = trans->num_rx_queues;
+       static const u32 rfh_tbl[] = {
+               RFH_RXF_DMA_CFG,
+               RFH_GEN_CFG,
+               RFH_GEN_STATUS,
+               FH_TSSR_TX_STATUS_REG,
+               FH_TSSR_TX_ERROR_REG,
+       };
+       static const struct reg rfh_mq_tbl[] = {
+               { RFH_Q0_FRBDCB_BA_LSB, true },
+               { RFH_Q0_FRBDCB_WIDX, false },
+               { RFH_Q0_FRBDCB_RIDX, false },
+               { RFH_Q0_URBD_STTS_WPTR_LSB, true },
+       };
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+       if (buf) {
+               int pos = 0;
+               /*
+                * Register (up to 34 for name + 8 blank/q for MQ): 40 chars
+                * Colon + space: 2 characters
+                * 0X%08x: 10 characters
+                * New line: 1 character
+                * Total of 53 characters
+                */
+               size_t bufsz = ARRAY_SIZE(rfh_tbl) * 53 +
+                              ARRAY_SIZE(rfh_mq_tbl) * 53 * num_q + 40;
+
+               *buf = kmalloc(bufsz, GFP_KERNEL);
+               if (!*buf)
+                       return -ENOMEM;
+
+               pos += scnprintf(*buf + pos, bufsz - pos,
+                               "RFH register values:\n");
+
+               for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
+                       pos += scnprintf(*buf + pos, bufsz - pos,
+                               "%40s: 0X%08x\n",
+                               get_rfh_string(rfh_tbl[i]),
+                               iwl_read_prph(trans, rfh_tbl[i]));
+
+               for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
+                       for (q = 0; q < num_q; q++) {
+                               u32 addr = rfh_mq_tbl[i].addr;
+
+                               addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
+                               pos += scnprintf(*buf + pos, bufsz - pos,
+                                       "%34s(q %2d): 0X%08x\n",
+                                       get_rfh_string(addr), q,
+                                       iwl_read_prph(trans, addr));
+                       }
+
+               return pos;
+       }
+#endif
+
+       IWL_ERR(trans, "RFH register values:\n");
+       for (i = 0; i < ARRAY_SIZE(rfh_tbl); i++)
+               IWL_ERR(trans, "  %34s: 0X%08x\n",
+                       get_rfh_string(rfh_tbl[i]),
+                       iwl_read_prph(trans, rfh_tbl[i]));
+
+       for (i = 0; i < ARRAY_SIZE(rfh_mq_tbl); i++)
+               for (q = 0; q < num_q; q++) {
+                       u32 addr = rfh_mq_tbl[i].addr;
+
+                       addr += q * (rfh_mq_tbl[i].is64 ? 8 : 4);
+                       IWL_ERR(trans, "  %34s(q %d): 0X%08x\n",
+                               get_rfh_string(addr), q,
+                               iwl_read_prph(trans, addr));
+               }
+
+       return 0;
+}
+
+static const char *get_fh_string(int cmd)
+{
        switch (cmd) {
        IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
        IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
@@ -262,6 +370,9 @@ int iwl_dump_fh(struct iwl_trans *trans, char **buf)
                FH_TSSR_TX_ERROR_REG
        };
 
+       if (trans->cfg->mq_rx_supported)
+               return iwl_dump_rfh(trans, buf);
+
 #ifdef CONFIG_IWLWIFI_DEBUGFS
        if (buf) {
                int pos = 0;