[PATCH] DSPBRIDGE: MMU-Fault debugging enhancements

* [PATCH] DSPBRIDGE: MMU-Fault debugging enhancements
@ 2010-04-09  0:15 Guzman Lugo, Fernando
  2010-04-22 21:45 ` Ramirez Luna, Omar
  2010-04-30 15:21 ` Felipe Contreras
  0 siblings, 2 replies; 8+ messages in thread
From: Guzman Lugo, Fernando @ 2010-04-09  0:15 UTC (permalink / raw)
  To: linux-omap; +Cc: Hiroshi DOYU, Ameya Palande, felipe.contreras

>From db3d76a2e89a1c227322a2732ddf7ebf5cd4b4cf Mon Sep 17 00:00:00 2001
From: Ernesto Ramos <ernesto@ti.com>
Date: Wed, 24 Mar 2010 11:12:05 -0600
Subject: [PATCH] DSPBRIDGE: MMU-Fault debugging enhancements

These changes allow for DSP task information to be printed
by the MPU dspbridge when DSP MMU fault ocurrs.

Signed-off-by: Cris Jansson <cjansson@ti.com>
[change to open source coding style]
Signed-off-by: Ernesto Ramos <ernesto@ti.com>
---
 arch/arm/plat-omap/include/dspbridge/cod.h   |    1 +
 arch/arm/plat-omap/include/dspbridge/dbll.h  |    3 +-
 arch/arm/plat-omap/include/dspbridge/gh.h    |    2 +
 arch/arm/plat-omap/include/dspbridge/io_sm.h |    5 +
 arch/arm/plat-omap/include/dspbridge/nldr.h  |    2 +
 arch/arm/plat-omap/include/dspbridge/node.h  |   15 +
 drivers/dsp/bridge/Makefile                  |    1 +
 drivers/dsp/bridge/gen/gh.c                  |   24 ++
 drivers/dsp/bridge/pmgr/dbll.c               |   84 ++++
 drivers/dsp/bridge/rmgr/nldr.c               |   80 ++++
 drivers/dsp/bridge/rmgr/node.c               |   31 ++
 drivers/dsp/bridge/wmd/io_sm.c               |  568 +++++++++++++++++++++-----
 drivers/dsp/bridge/wmd/ue_deh.c              |   74 +++-
 13 files changed, 780 insertions(+), 110 deletions(-)

diff --git a/arch/arm/plat-omap/include/dspbridge/cod.h b/arch/arm/plat-omap/include/dspbridge/cod.h
index 3d76a6b..92311cd 100644
--- a/arch/arm/plat-omap/include/dspbridge/cod.h
+++ b/arch/arm/plat-omap/include/dspbridge/cod.h
@@ -26,6 +26,7 @@
 #define COD_MAXPATHLENGTH       255
 #define COD_TRACEBEG            "SYS_PUTCBEG"
 #define COD_TRACEEND            "SYS_PUTCEND"
+#define COD_TRACECURPOS        "BRIDGE_SYS_PUTC_current"
 #define COD_TRACESECT           "trace"
 #define COD_TRACEBEGOLD         "PUTCBEG"
 #define COD_TRACEENDOLD         "PUTCEND"
diff --git a/arch/arm/plat-omap/include/dspbridge/dbll.h b/arch/arm/plat-omap/include/dspbridge/dbll.h
index daf8a0a..01c4647 100644
--- a/arch/arm/plat-omap/include/dspbridge/dbll.h
+++ b/arch/arm/plat-omap/include/dspbridge/dbll.h
@@ -51,5 +51,6 @@ extern void dbll_set_attrs(struct dbll_tar_obj *target,
 extern void dbll_unload(struct dbll_library_obj *lib, struct dbll_attrs *attrs);
 extern dsp_status dbll_unload_sect(struct dbll_library_obj *lib,
                                   char *sectName, struct dbll_attrs *attrs);
-
+bool dbll_find_dsp_symbol(struct dbll_library_obj *zl_lib, u32 address,
+               u32 offset_range, u32 *sym_addr_output, char *name_output);
 #endif /* DBLL_ */
diff --git a/arch/arm/plat-omap/include/dspbridge/gh.h b/arch/arm/plat-omap/include/dspbridge/gh.h
index e4da0f2..55c0489 100644
--- a/arch/arm/plat-omap/include/dspbridge/gh.h
+++ b/arch/arm/plat-omap/include/dspbridge/gh.h
@@ -27,4 +27,6 @@ extern void gh_exit(void);
 extern void *gh_find(struct gh_t_hash_tab *hash_tab, void *key);
 extern void gh_init(void);
 extern void *gh_insert(struct gh_t_hash_tab *hash_tab, void *key, void *value);
+void gh_iterate(struct gh_t_hash_tab *hash_tab,
+       void (*callback)(void *, void *), void *user_data);
 #endif /* GH_ */
diff --git a/arch/arm/plat-omap/include/dspbridge/io_sm.h b/arch/arm/plat-omap/include/dspbridge/io_sm.h
index aa4d0cf..66aa50f 100644
--- a/arch/arm/plat-omap/include/dspbridge/io_sm.h
+++ b/arch/arm/plat-omap/include/dspbridge/io_sm.h
@@ -293,4 +293,9 @@ extern void io_sm_init(void);
 extern dsp_status print_dsp_trace_buffer(struct wmd_dev_context
                                         *hwmd_context);

+dsp_status dump_dsp_stack(struct wmd_dev_context *wmd_context);
+
+void dump_dl_modules(struct wmd_dev_context *wmd_context);
+
+
 #endif /* IOSM_ */
diff --git a/arch/arm/plat-omap/include/dspbridge/nldr.h b/arch/arm/plat-omap/include/dspbridge/nldr.h
index 2ec928a..2b930d1 100644
--- a/arch/arm/plat-omap/include/dspbridge/nldr.h
+++ b/arch/arm/plat-omap/include/dspbridge/nldr.h
@@ -49,5 +49,7 @@ extern dsp_status nldr_load(struct nldr_nodeobject *nldr_node_obj,
                            enum nldr_phase phase);
 extern dsp_status nldr_unload(struct nldr_nodeobject *nldr_node_obj,
                              enum nldr_phase phase);
+dsp_status nldr_find_addr(struct nldr_nodeobject *nldr_node, u32 sym_addr,
+       u32 offset_range, void *offset_output, char *sym_name);

 #endif /* NLDR_ */
diff --git a/arch/arm/plat-omap/include/dspbridge/node.h b/arch/arm/plat-omap/include/dspbridge/node.h
index ec0dcf3..e3c98f9 100644
--- a/arch/arm/plat-omap/include/dspbridge/node.h
+++ b/arch/arm/plat-omap/include/dspbridge/node.h
@@ -566,4 +566,19 @@ extern dsp_status node_get_uuid_props(void *hprocessor,
                                      OUT struct dsp_ndbprops
                                      *node_props);

+/**
+ * node_find_addr() - Find the closest symbol to the given address.
+ *
+ * @node_mgr:          Node manager handle
+ * @sym_addr:          Given address to find the closest symbol
+ * @offset_range:              offset range to look fo the closest symbol
+ * @sym_addr_output:   Symbol Output address
+ * @sym_name:          String with the symbol name of the closest symbol
+ *
+ *     This function finds the closest symbol to the address where a MMU
+ *     Fault occurred on the DSP side.
+ */
+dsp_status node_find_addr(struct node_mgr *node_mgr, u32 sym_addr,
+                               u32 offset_range, void *sym_addr_output,
+                               char *sym_name);
 #endif /* NODE_ */
diff --git a/drivers/dsp/bridge/Makefile b/drivers/dsp/bridge/Makefile
index 5a28374..75a6d69 100644
--- a/drivers/dsp/bridge/Makefile
+++ b/drivers/dsp/bridge/Makefile
@@ -30,5 +30,6 @@ ccflags-y += -Idrivers/dsp/bridge/services
 ccflags-y += -Idrivers/dsp/bridge/wmd
 ccflags-y += -Idrivers/dsp/bridge/pmgr
 ccflags-y += -Idrivers/dsp/bridge/rmgr
+ccflags-y += -Idrivers/dsp/bridge/dynload
 ccflags-y += -Idrivers/dsp/bridge/hw
 ccflags-y += -Iarch/arm
diff --git a/drivers/dsp/bridge/gen/gh.c b/drivers/dsp/bridge/gen/gh.c
index dc211ae..d1e7b38 100644
--- a/drivers/dsp/bridge/gen/gh.c
+++ b/drivers/dsp/bridge/gen/gh.c
@@ -187,3 +187,27 @@ static void myfree(void *ptr, s32 size)
 {
        gs_free(ptr);
 }
+
+/**
+ * gh_iterate() - This function goes through all the elements in the hash table
+ *             looking for the dsp symbols.
+ * @hash_tab:  Hash table
+ * @callback:  pointer to callback function
+ * @user_data: User data, contains the find_symbol_context pointer
+ *
+ */
+void gh_iterate(struct gh_t_hash_tab *hash_tab,
+               void (*callback)(void *, void *), void *user_data)
+{
+       struct element *elem;
+       u32 i;
+
+       if (hash_tab && hash_tab->buckets)
+               for (i = 0; i < hash_tab->max_bucket; i++) {
+                       elem = hash_tab->buckets[i];
+                       while (elem) {
+                               callback(&elem->data, user_data);
+                               elem = elem->next;
+                       }
+               }
+}
diff --git a/drivers/dsp/bridge/pmgr/dbll.c b/drivers/dsp/bridge/pmgr/dbll.c
index 0e7c4a4..10db052 100644
--- a/drivers/dsp/bridge/pmgr/dbll.c
+++ b/drivers/dsp/bridge/pmgr/dbll.c
@@ -1515,3 +1515,87 @@ static int execute(struct dynamic_loader_initialize *this, ldr_addr start)
 static void release(struct dynamic_loader_initialize *this)
 {
 }
+
+/**
+ *  find_symbol_context - Basic symbol context structure
+ * @address:           Symbol Adress
+ * @offset_range:              Offset range where the search for the DSP symbol
+ *                     started.
+ * @cur_best_offset:   Best offset to start looking for the DSP symbol
+ * @sym_addr:          Address of the DSP symbol
+ * @name:              Symbol name
+ *
+ */
+struct find_symbol_context {
+       /* input */
+       u32 address;
+       u32 offset_range;
+       /* state */
+       u32 cur_best_offset;
+       /* output */
+       u32 sym_addr;
+       char name[120];
+};
+
+/**
+ * find_symbol_callback() - Validates symbol address and copies the symbol name
+ *                     to the user data.
+ * @elem:              dsp library context
+ * @user_data:         Find symbol context
+ *
+ */
+void find_symbol_callback(void *elem, void *user_data)
+{
+       struct dbll_symbol *symbol = elem;
+       struct find_symbol_context *context = user_data;
+       u32 symbol_addr = symbol->value.value;
+       u32 offset = context->address - symbol_addr;
+
+       /*
+        * Address given should be greater than symbol address,
+        * symbol address should be  within specified range
+        * and the offset should be better than previous one
+        */
+       if (context->address >= symbol_addr && symbol_addr < (u32)-1 &&
+               offset < context->cur_best_offset) {
+               context->cur_best_offset = offset;
+               context->sym_addr = symbol_addr;
+               strncpy(context->name, symbol->name, sizeof(context->name));
+       }
+
+       return;
+}
+
+/**
+ * dbll_find_dsp_symbol() - This function retrieves the dsp symbol from the dsp binary.
+ * @zl_lib:            DSP binary obj library pointer
+ * @address:           Given address to find the dsp symbol
+ * @offset_range:              offset range to look for dsp symbol
+ * @sym_addr_output:   Symbol Output address
+ * @name_output:               String with the dsp symbol
+ *
+ *     This function retrieves the dsp symbol from the dsp binary.
+ */
+bool dbll_find_dsp_symbol(struct dbll_library_obj *zl_lib, u32 address,
+                               u32 offset_range, u32 *sym_addr_output,
+                               char *name_output)
+{
+       bool status = false;
+       struct find_symbol_context context;
+
+       context.address = address;
+       context.offset_range = offset_range;
+       context.cur_best_offset = offset_range;
+       context.sym_addr = 0;
+       context.name[0] = '\0';
+
+       gh_iterate(zl_lib->sym_tab, find_symbol_callback, &context);
+
+       if (context.name[0]) {
+               status = true;
+               strcpy(name_output, context.name);
+               *sym_addr_output = context.sym_addr;
+       }
+
+       return status;
+}
diff --git a/drivers/dsp/bridge/rmgr/nldr.c b/drivers/dsp/bridge/rmgr/nldr.c
index c23deda..6a88ea8 100644
--- a/drivers/dsp/bridge/rmgr/nldr.c
+++ b/drivers/dsp/bridge/rmgr/nldr.c
@@ -1931,3 +1931,83 @@ static u32 find_gcf(u32 a, u32 b)
        }
        return b;
 }
+
+/**
+ * nldr_find_addr() - Find the closest symbol to the given address based on
+ *             dynamic node object.
+ *
+ * @nldr_node:         Dynamic node object
+ * @sym_addr:          Given address to find the dsp symbol
+ * @offset_range:              offset range to look for dsp symbol
+ * @offset_output:             Symbol Output address
+ * @sym_name:          String with the dsp symbol
+ *
+ *     This function finds the node library for a given address and
+ *     retrieves the dsp symbol by calling dbll_find_dsp_symbol.
+ */
+dsp_status nldr_find_addr(struct nldr_nodeobject *nldr_node, u32 sym_addr,
+                       u32 offset_range, void *offset_output, char *sym_name)
+{
+       dsp_status status = DSP_SOK;
+       bool status1 = false;
+       s32 i = 0;
+       struct lib_node root = { NULL, 0, NULL };
+       DBC_REQUIRE(refs > 0);
+       DBC_REQUIRE(MEM_IS_VALID_HANDLE(nldr_node, NLDR_NODESIGNATURE));
+       DBC_REQUIRE(offset_output != NULL);
+       DBC_REQUIRE(sym_name != NULL);
+       pr_debug("%s(0x%x, 0x%x, 0x%x, 0x%x,  %s)\n", __func__, (u32) nldr_node,
+                       sym_addr, offset_range, (u32) offset_output, sym_name);
+
+       if (nldr_node->dynamic && *nldr_node->pf_phase_split) {
+               switch (nldr_node->phase) {
+               case NLDR_CREATE:
+                       root = nldr_node->create_lib;
+                       break;
+               case NLDR_EXECUTE:
+                       root = nldr_node->execute_lib;
+                       break;
+               case NLDR_DELETE:
+                       root = nldr_node->delete_lib;
+                       break;
+               default:
+                       DBC_ASSERT(false);
+                       break;
+               }
+       } else {
+               /* for Overlay nodes or non-split Dynamic nodes */
+               root = nldr_node->root;
+       }
+
+       status1 = dbll_find_dsp_symbol(root.lib, sym_addr,
+                       offset_range, offset_output, sym_name);
+
+       /* If symbol not found, check dependent libraries */
+       if (!status1)
+               for (i = 0; i < root.dep_libs; i++) {
+                       status1 = dbll_find_dsp_symbol(
+                               root.dep_libs_tree[i].lib, sym_addr,
+                               offset_range, offset_output, sym_name);
+                       if (status1)
+                               /* Symbol found */
+                               break;
+               }
+       /* Check persistent libraries */
+       if (!status1)
+               for (i = 0; i < nldr_node->pers_libs; i++) {
+                       status1 = dbll_find_dsp_symbol(
+                               nldr_node->pers_lib_table[i].lib, sym_addr,
+                               offset_range, offset_output, sym_name);
+                       if (status1)
+                               /* Symbol found */
+                               break;
+               }
+
+       if (!status1) {
+               pr_debug("%s: Address 0x%x not found in range %d.\n",
+                                       __func__, sym_addr, offset_range);
+               status = DSP_ESYMBOL;
+       }
+
+       return status;
+}
diff --git a/drivers/dsp/bridge/rmgr/node.c b/drivers/dsp/bridge/rmgr/node.c
index 32df890..66e28c7 100644
--- a/drivers/dsp/bridge/rmgr/node.c
+++ b/drivers/dsp/bridge/rmgr/node.c
@@ -3206,3 +3206,34 @@ static u32 mem_write(void *priv_ref, u32 ulDspAddr, void *pbuf,

        return ul_num_bytes;
 }
+
+/*
+ *  ======== node_find_addr ========
+ */
+dsp_status node_find_addr(struct node_mgr *node_mgr, u32 sym_addr,
+               u32 offset_range, void *sym_addr_output, char *sym_name)
+{
+       struct node_object *node_obj;
+       dsp_status status = DSP_ENOTFOUND;
+       u32 n;
+
+       pr_debug("%s(0x%x, 0x%x, 0x%x, 0x%x,  %s)\n", __func__,
+                       (unsigned int) node_mgr,
+                       sym_addr, offset_range,
+                       (unsigned int) sym_addr_output, sym_name);
+
+       node_obj = (struct node_object *)(node_mgr->node_list->head.next);
+
+       for (n = 0; n < node_mgr->num_nodes; n++) {
+               status = nldr_find_addr(node_obj->nldr_node_obj, sym_addr,
+                       offset_range, sym_addr_output, sym_name);
+
+               if (DSP_SUCCEEDED(status))
+                       break;
+
+               node_obj = (struct node_object *) (node_obj->list_elem.next);
+       }
+
+       return status;
+}
+
diff --git a/drivers/dsp/bridge/wmd/io_sm.c b/drivers/dsp/bridge/wmd/io_sm.c
index 545cca0..480968d 100644
--- a/drivers/dsp/bridge/wmd/io_sm.c
+++ b/drivers/dsp/bridge/wmd/io_sm.c
@@ -58,6 +58,7 @@

 /* Platform Manager */
 #include <dspbridge/cod.h>
+#include <dspbridge/node.h>
 #include <dspbridge/dev.h>

 /* Others */
@@ -65,6 +66,7 @@
 #include <dspbridge/mgr.h>
 #include <dspbridge/drv.h>
 #include "_cmm.h"
+#include "module_list.h"

 /* This */
 #include <dspbridge/io_sm.h>
@@ -81,6 +83,11 @@

 #define MAX_PM_REQS 32

+#define MMU_FAULT_HEAD1 0xa5a5a5a5
+#define MMU_FAULT_HEAD2 0x96969696
+#define POLL_MAX 1000
+#define MAX_MMU_DBGBUFF 10240
+
 /* IO Manager: only one created per board */
 struct io_mgr {
        /* These four fields must be the first fields in a io_mgr_ struct */
@@ -949,9 +956,13 @@ void io_dpc(IN OUT unsigned long pRefData)
                if ((pio_mgr->intr_val > DEH_BASE) &&
                    (pio_mgr->intr_val < DEH_LIMIT)) {
                        /* Notify DSP/BIOS exception */
-                       if (hdeh_mgr)
+                       if (hdeh_mgr) {
+#ifndef DSP_TRACE_BUF_DISABLED
+                               print_dsp_debug_trace(pio_mgr);
+#endif
                                bridge_deh_notify(hdeh_mgr, DSP_SYSERROR,
                                                  pio_mgr->intr_val);
+                       }
                }
                io_dispatch_chnl(pio_mgr, NULL, IO_SERVICE);
 #ifdef CHNL_MESSAGES
@@ -1866,71 +1877,6 @@ void print_dsp_debug_trace(struct io_mgr *hio_mgr)
 #endif

 /*
- *  ======== pack_trace_buffer ========
- *      Removes extra nulls from the trace buffer returned from the DSP.
- *      Works even on buffers that already are packed (null removed); but has
- *      one bug in that case -- loses the last character (replaces with '\0').
- *      Continues through conversion for full set of bytes input characters.
- *  Parameters:
- *    lpBuf:            Pointer to input/output buffer
- *    bytes:           Number of characters in the buffer
- *    ul_num_words:    Number of DSP words in the buffer. Indicates potential
- *                      number of extra carriage returns to generate.
- *  Returns:
- *      DSP_SOK:        Success.
- *      DSP_EMEMORY:    Unable to allocate memory.
- *  Requires:
- *      lpBuf must be a fully allocated writable block of at least bytes.
- *      There are no more than ul_num_words extra characters needed (the number
- *      of linefeeds minus the number of NULLS in the input buffer).
- */
-static dsp_status pack_trace_buffer(char *lpBuf, u32 bytes, u32 ul_num_words)
-{
-       dsp_status status = DSP_SOK;
-       char *lp_tmp_buf;
-       char *lp_buf_start;
-       char *lp_tmp_start;
-       u32 i;
-       char this_char;
-
-       /* Tmp workspace, 1 KB longer than input buf */
-       lp_tmp_buf = mem_calloc((bytes + ul_num_words), MEM_PAGED);
-       if (lp_tmp_buf == NULL)
-               status = DSP_EMEMORY;
-
-       if (DSP_SUCCEEDED(status)) {
-               lp_buf_start = lpBuf;
-               lp_tmp_start = lp_tmp_buf;
-               for (i = bytes; i > 0; i--) {
-                       this_char = *lpBuf++;
-                       switch (this_char) {
-                       case '\0':      /* Skip null bytes */
-                               break;
-                       case '\n':      /* Convert \n to \r\n */
-                               /*
-                                * NOTE: do not reverse order; Some OS
-                                * editors control doesn't understand "\n\r"
-                                */
-                               *lp_tmp_buf++ = '\r';
-                               *lp_tmp_buf++ = '\n';
-                               break;
-                       default:        /* Copy in the actual ascii byte */
-                               *lp_tmp_buf++ = this_char;
-                               break;
-                       }
-               }
-               *lp_tmp_buf = '\0';     /* Temp buf MUST be null terminated */
-               /* Cut output down to input buf size */
-               strncpy(lp_buf_start, lp_tmp_start, bytes);
-               /* Make sure output is null terminated */
-               lp_buf_start[bytes - 1] = '\0';
-               kfree(lp_tmp_start);
-       }
-
-       return status;
-}
-
-/*
  *  ======== print_dsp_trace_buffer ========
  *      Prints the trace buffer returned from the DSP (if DBG_Trace is enabled).
  *  Parameters:
@@ -1948,72 +1894,486 @@ dsp_status print_dsp_trace_buffer(struct wmd_dev_context *hwmd_context)
        struct cod_manager *cod_mgr;
        u32 ul_trace_end;
        u32 ul_trace_begin;
+       u32 trace_cur_pos;
        u32 ul_num_bytes = 0;
        u32 ul_num_words = 0;
        u32 ul_word_size = 2;
-       CONST u32 max_size = 512;
        char *psz_buf;
-       u16 *lpsz_buf;
+       char *str_beg;
+       char *trace_end;
+       char *buf_end;
+       char *new_line;

-       struct wmd_dev_context *pwmd_context = (struct wmd_dev_context *)
-           hwmd_context;
+       struct wmd_dev_context *pwmd_context = hwmd_context;
        struct bridge_drv_interface *intf_fxns;
        struct dev_object *dev_obj = (struct dev_object *)
            pwmd_context->hdev_obj;

        status = dev_get_cod_mgr(dev_obj, &cod_mgr);

-       if (DSP_SUCCEEDED(status)) {
+       if (DSP_SUCCEEDED(status))
                /* Look for SYS_PUTCBEG/SYS_PUTCEND */
                status =
                    cod_get_sym_value(cod_mgr, COD_TRACEBEG, &ul_trace_begin);
-       }
+
        if (DSP_SUCCEEDED(status))
                status =
                    cod_get_sym_value(cod_mgr, COD_TRACEEND, &ul_trace_end);

+
+       if (DSP_SUCCEEDED(status))
+               /* trace_cur_pos will hold the address of a DSP pointer */
+               status = cod_get_sym_value(cod_mgr, COD_TRACECURPOS,
+                                                       &trace_cur_pos);
+
+       if (DSP_FAILED(status))
+               goto func_end;
+
+       ul_num_bytes = (ul_trace_end - ul_trace_begin);
+
+       ul_num_words = ul_num_bytes * ul_word_size;
+       status = dev_get_intf_fxns(dev_obj, &intf_fxns);
+
+       if (DSP_FAILED(status))
+               goto func_end;
+
+       psz_buf = mem_calloc(ul_num_bytes + 2, MEM_NONPAGED);
+       if (psz_buf != NULL) {
+               /* Read trace buffer data */
+               status = (*intf_fxns->pfn_brd_read)(pwmd_context,
+                       (u8 *)psz_buf, (u32)ul_trace_begin,
+                       ul_num_bytes, 0);
+
+               if (DSP_FAILED(status))
+                       goto func_end;
+
+               /* Pack and do newline conversion */
+               pr_debug("PrintDspTraceBuffer: "
+                       "before pack and unpack.\n");
+               pr_debug("%s: DSP Trace Buffer Begin:\n"
+                       "=======================\n%s\n",
+                       __func__, psz_buf);
+
+               /* Read the value at the DSP address in trace_cur_pos. */
+               status = (*intf_fxns->pfn_brd_read)(pwmd_context,
+                               (u8 *)&trace_cur_pos, (u32)trace_cur_pos,
+                               4, 0);
+               if (DSP_FAILED(status))
+                       goto func_end;
+               /* Pack and do newline conversion */
+               pr_info("%s: DSP Trace Buffer Begin:\n"
+                       "=======================\n%s\n",
+                       __func__, psz_buf);
+
+
+               /* convert to offset */
+               trace_cur_pos = trace_cur_pos - ul_trace_begin;
+
+               if (ul_num_bytes) {
+                       /*
+                        * The buffer is not full, find the end of the
+                        * data -- buf_end will be >= pszBuf after
+                        * while.
+                        */
+                       buf_end = &psz_buf[ul_num_bytes+1];
+                       /* DSP print position */
+                       trace_end = &psz_buf[trace_cur_pos];
+
+                       /*
+                        * Search buffer for a new_line and replace it
+                        * with '\0', then print as string.
+                        * Continue until end of buffer is reached.
+                        */
+                       str_beg = trace_end;
+                       ul_num_bytes = buf_end - str_beg;
+
+                       while (str_beg < buf_end) {
+                               new_line = strnchr(str_beg, ul_num_bytes,
+                                                               '\n');
+                               if (new_line && new_line < buf_end) {
+                                       *new_line = 0;
+                                       pr_debug("%s\n", str_beg);
+                                       str_beg = ++new_line;
+                                       ul_num_bytes = buf_end - str_beg;
+                               } else {
+                                       /*
+                                        * Assume buffer empty if it contains
+                                        * a zero
+                                        */
+                                       if (*str_beg != '\0') {
+                                               str_beg[ul_num_bytes] = 0;
+                                               pr_debug("%s\n", str_beg);
+                                       }
+                                       str_beg = buf_end;
+                                       ul_num_bytes = 0;
+                               }
+                       }
+                       /*
+                        * Search buffer for a nNewLine and replace it
+                        * with '\0', then print as string.
+                        * Continue until buffer is exhausted.
+                        */
+                       str_beg = psz_buf;
+                       ul_num_bytes = trace_end - str_beg;
+
+                       while (str_beg < trace_end) {
+                               new_line = strnchr(str_beg, ul_num_bytes, '\n');
+                               if (new_line != NULL && new_line < trace_end) {
+                                       *new_line = 0;
+                                       pr_debug("%s\n", str_beg);
+                                       str_beg = ++new_line;
+                                       ul_num_bytes = trace_end - str_beg;
+                               } else {
+                                       /*
+                                        * Assume buffer empty if it contains
+                                        * a zero
+                                        */
+                                       if (*str_beg != '\0') {
+                                               str_beg[ul_num_bytes] = 0;
+                                               pr_debug("%s\n", str_beg);
+                                       }
+                                       str_beg = trace_end;
+                                       ul_num_bytes = 0;
+                               }
+                       }
+               }
+               pr_info("\n=======================\n"
+                       "DSP Trace Buffer End:\n");
+               kfree(psz_buf);
+       } else {
+               status = DSP_EMEMORY;
+       }
+func_end:
+       if (DSP_FAILED(status))
+               dev_dbg(bridge, "%s Failed, status 0x%x\n", __func__, status);
+       return status;
+}
+
+void io_sm_init(void)
+{
+       /* Do nothing */
+}
+/**
+ * dump_dsp_stack() - This function dumps the data on the DSP stack.
+ * @wmd_context:       Mini driver's device context pointer.
+ *
+ */
+dsp_status dump_dsp_stack(struct wmd_dev_context *wmd_context)
+{
+       dsp_status status = DSP_SOK;
+       struct cod_manager *code_mgr;
+       struct node_mgr *node_mgr;
+       u32 trace_begin;
+       char name[256];
+       struct {
+               u32 head[2];
+               u32 size;
+       } mmu_fault_dbg_info;
+       u32 *buffer;
+       u32 *buffer_end;
+       u32 exc_type;
+       u32 i;
+       u32 offset_output;
+       u32 total_size;
+       u32 poll_cnt;
+       const char *dsp_regs[] = {"EFR", "IERR", "ITSR", "NTSR",
+                               "IRP", "NRP", "AMR", "SSR",
+                               "ILC", "RILC", "IER", "CSR"};
+       struct bridge_drv_interface *intf_fxns;
+       struct dev_object *dev_object = wmd_context->hdev_obj;
+
+       status = dev_get_cod_mgr(dev_object, &code_mgr);
+       if (!code_mgr) {
+               pr_debug("%s: Failed on dev_get_cod_mgr.\n", __func__);
+               status = DSP_EHANDLE;
+       }
+
        if (DSP_SUCCEEDED(status)) {
-               ul_num_bytes = (ul_trace_end - ul_trace_begin) * ul_word_size;
-               /*
-                * If the chip type is 55 then the addresses will be
-                * byte addresses; convert them to word addresses.
-                */
-               if (ul_num_bytes > max_size)
-                       ul_num_bytes = max_size;
+               status = dev_get_node_manager(dev_object, &node_mgr);
+               if (!node_mgr) {
+                       pr_debug("%s: Failed on dev_get_node_manager.\n",
+                                                               __func__);
+                       status = DSP_EHANDLE;
+               }
+       }

-               /* Make sure the data we request fits evenly */
-               ul_num_bytes = (ul_num_bytes / ul_word_size) * ul_word_size;
-               ul_num_words = ul_num_bytes * ul_word_size;
-               status = dev_get_intf_fxns(dev_obj, &intf_fxns);
+       if (DSP_SUCCEEDED(status)) {
+               /* Look for SYS_PUTCBEG/SYS_PUTCEND: */
+               status =
+                       cod_get_sym_value(code_mgr, COD_TRACEBEG, &trace_begin);
+               pr_debug("%s: trace_begin Value 0x%x\n",
+                       __func__, trace_begin);
+               if (DSP_FAILED(status))
+                       pr_debug("%s: Failed on cod_get_sym_value.\n",
+                                                               __func__);
+       }
+       if (DSP_SUCCEEDED(status))
+               status = dev_get_intf_fxns(dev_object, &intf_fxns);
+       /*
+        * Check for the "magic number" in the trace buffer.  If it has
+        * yet to appear then poll the trace buffer to wait for it.  Its
+        * appearance signals that the DSP has finished dumping its state.
+        */
+       mmu_fault_dbg_info.head[0] = 0;
+       mmu_fault_dbg_info.head[1] = 0;
+       if (DSP_SUCCEEDED(status)) {
+               poll_cnt = 0;
+               while ((mmu_fault_dbg_info.head[0] != MMU_FAULT_HEAD1 ||
+                       mmu_fault_dbg_info.head[1] != MMU_FAULT_HEAD2) &&
+                       poll_cnt < POLL_MAX) {
+
+                       /* Read DSP dump size from the DSP trace buffer... */
+                       status = (*intf_fxns->pfn_brd_read)(wmd_context,
+                               (u8 *)&mmu_fault_dbg_info, (u32)trace_begin,
+                               sizeof(mmu_fault_dbg_info), 0);
+
+                       if (DSP_FAILED(status))
+                               break;
+
+                       poll_cnt++;
+               }
+
+               if (mmu_fault_dbg_info.head[0] != MMU_FAULT_HEAD1 &&
+                       mmu_fault_dbg_info.head[1] != MMU_FAULT_HEAD2) {
+                       status = DSP_ETIMEOUT;
+                       pr_err("%s:No DSP MMU-Fault information available.\n",
+                                                       __func__);
+               }
        }

        if (DSP_SUCCEEDED(status)) {
-               psz_buf = mem_calloc(max_size, MEM_NONPAGED);
-               lpsz_buf = mem_calloc(ul_num_bytes * 2, MEM_NONPAGED);
-               if (psz_buf != NULL) {
-                       /* Read bytes from the DSP trace buffer... */
-                       status = (*intf_fxns->pfn_brd_read) (hwmd_context,
-                                                            (u8 *) psz_buf,
-                                                            (u32)
-                                                            ul_trace_begin,
-                                                            ul_num_bytes, 0);
-
-                       if (DSP_SUCCEEDED(status)) {
-                               /* Pack and do newline conversion */
-                               pack_trace_buffer(psz_buf, ul_num_bytes,
-                                                 ul_num_words);
-                               pr_info("%s:\n%s\n", __func__, psz_buf);
-                       }
-                       kfree(psz_buf);
-                       kfree(lpsz_buf);
-               } else {
+               total_size = mmu_fault_dbg_info.size;
+               /* Limit the size in case DSP went crazy */
+               if (total_size > MAX_MMU_DBGBUFF)
+                       total_size = MAX_MMU_DBGBUFF;
+
+               buffer = mem_calloc(total_size, MEM_NONPAGED);
+               buffer_end =  buffer + total_size / 4;
+
+               if (!buffer) {
                        status = DSP_EMEMORY;
+                       pr_debug("%s: Failed to "
+                               "allocate stack dump buffer.\n", __func__);
+                       goto func_end;
+               }
+
+               /* Read bytes from the DSP trace buffer... */
+               status = (*intf_fxns->pfn_brd_read)(wmd_context,
+                               (u8 *)buffer, (u32)trace_begin,
+                               total_size, 0);
+               if (DSP_FAILED(status)) {
+                       pr_debug("%s: Failed to Read Trace Buffer.\n",
+                                                               __func__);
+                       goto func_end;
                }
+
+               pr_err("Aproximate Crash Position:\n");
+               pr_err("--------------------------\n");
+
+               exc_type = buffer[3];
+               if (!exc_type)
+                       i = buffer[79];         /* IRP */
+               else
+                       i = buffer[80];         /* NRP */
+
+               if ((*buffer > 0x01000000) && (node_find_addr(node_mgr, i,
+                       0x1000, &offset_output, name) == DSP_SOK))
+                       pr_err("0x%-8x [\"%s\" + 0x%x]\n", i, name,
+                                                       i - offset_output);
+               else
+                       pr_err("0x%-8x [Unable to match to a symbol.]\n", i);
+
+               pr_err("Execution Info:\n");
+               pr_err("---------------\n");
+
+               for (i = 0; i < 32; i++) {
+                       if (i == 4 || i == 6 || i == 8)
+                               pr_err("A%d 0x%-8x [Function Argument %d]\n",
+                                                       i, *buffer++, i-3);
+                       else if (i == 15)
+                               pr_err("A15 0x%-8x [Frame Pointer]\n",
+                                                               *buffer++);
+                       else
+                               pr_err("A%d 0x%x\n", i, *buffer++);
+               }
+
+               pr_err("\nB0 0x%x\n", *buffer++);
+               pr_err("B1 0x%x\n", *buffer++);
+               pr_err("B2 0x%x\n", *buffer++);
+
+               if ((*buffer > 0x01000000) && (node_find_addr(node_mgr, *buffer,
+                       0x1000, &offset_output, name) == DSP_SOK))
+
+                       pr_err("B3 0x%-8x [Function Return Pointer:"
+                               " \"%s\" + 0x%x]\n", *buffer, name,
+                               *buffer - offset_output);
+               else
+                       pr_err("B3 0x%-8x [Function Return Pointer:"
+                               "Unable to match to a symbol.]\n", *buffer);
+
+               buffer++;
+
+               for (i = 4; i < 32; i++) {
+                       if (i == 4 || i == 6 || i == 8)
+                               pr_err("B%d 0x%-8x [Function Argument %d]\n",
+                                                       i, *buffer++, i-2);
+                       else if (i == 15)
+                               pr_err("B14 0x%-8x [Data Page Pointer]\n",
+                                                               *buffer++);
+                       else
+                               pr_err("B%d 0x%x\n", i, *buffer++);
+               }
+
+               for (i = 0; i < ARRAY_SIZE(dsp_regs); i++)
+                       pr_err("%s 0x%x\n", dsp_regs[i], *buffer++);
+
+               for (i = 0; buffer < buffer_end; i++, buffer++) {
+                       if ((*buffer > 0x01000000) && (node_find_addr(node_mgr,
+                               *buffer , 0x600, &offset_output, name) ==
+                               DSP_SOK))
+                               pr_err("[%d] 0x%-8x [\"%s\" + 0x%x]\n",
+                                       i, *buffer, name,
+                                       *buffer - offset_output);
+                       else
+                               pr_err("[%d] 0x%x\n", i, *buffer);
+               }
+               kfree(buffer - total_size / 4);
        }
+func_end:
        return status;
 }

-void io_sm_init(void)
+/**
+ * dump_dl_modules() - This functions dumps the _DLModules loaded in DSP side
+ * @wmd_context:               Mini driver's device context pointer.
+ *
+ */
+void dump_dl_modules(struct wmd_dev_context *wmd_context)
 {
-       /* Do nothing */
+       struct cod_manager *code_mgr;
+       struct bridge_drv_interface *intf_fxns;
+       struct wmd_dev_context *wmd_ctxt = wmd_context;
+       struct dev_object *dev_object = wmd_ctxt->hdev_obj;
+       struct modules_header modules_hdr;
+       struct dll_module *module_struct = NULL;
+       u32 module_dsp_addr;
+       u32 module_size;
+       u32 module_struct_size = 0;
+       u32 sect_ndx;
+       char *sect_str ;
+       dsp_status status = DSP_SOK;
+
+       status = dev_get_intf_fxns(dev_object, &intf_fxns);
+       if (DSP_FAILED(status)) {
+               pr_debug("%s: Failed on dev_get_intf_fxns.\n", __func__);
+               goto func_end;
+       }
+
+       status = dev_get_cod_mgr(dev_object, &code_mgr);
+       if (!code_mgr) {
+               pr_debug("%s: Failed on dev_get_cod_mgr.\n", __func__);
+               status = DSP_EHANDLE;
+               goto func_end;
+       }
+
+       /* Lookup  the address of the modules_header structure */
+       status = cod_get_sym_value(code_mgr, "_DLModules", &module_dsp_addr);
+       if (DSP_FAILED(status)) {
+               pr_debug("%s: Failed on cod_get_sym_value for _DLModules.\n",
+                       __func__);
+               goto func_end;
+       }
+
+       pr_debug("%s: _DLModules at 0x%x\n", __func__, module_dsp_addr);
+
+       /* Copy the modules_header structure from DSP memory. */
+       status = (*intf_fxns->pfn_brd_read)(wmd_context, (u8 *) &modules_hdr,
+                               (u32) module_dsp_addr, sizeof(modules_hdr), 0);
+
+       if (DSP_FAILED(status)) {
+               pr_debug("%s: Failed failed to read modules header.\n",
+                                                               __func__);
+               goto func_end;
+       }
+
+       module_dsp_addr = modules_hdr.first_module;
+       module_size = modules_hdr.first_module_size;
+
+       pr_debug("%s: dll_module_header 0x%x %d\n", __func__, module_dsp_addr,
+                                                               module_size);
+
+       pr_err("%s: \nDynamically Loaded Modules:\n"
+               "---------------------------\n", __func__);
+
+       /* For each dll_module structure in the list... */
+       while (module_size) {
+               /*
+                * Allocate/re-allocate memory to hold the dll_module
+                * structure. The memory is re-allocated only if the existing
+                * allocation is too small.
+                */
+               if (module_size > module_struct_size) {
+                       kfree(module_struct);
+                       module_struct = mem_calloc(module_size+128,
+                                                       MEM_NONPAGED);
+                       module_struct_size = module_size+128;
+                       pr_debug("%s: allocated module struct %p %d\n",
+                               __func__, module_struct, module_struct_size);
+                       if (!module_struct)
+                               goto func_end;
+               }
+               /* Copy the dll_module structure from DSP memory */
+               status = (*intf_fxns->pfn_brd_read)(wmd_context,
+                       (u8 *)module_struct, module_dsp_addr, module_size, 0);
+
+               if (DSP_FAILED(status)) {
+                       pr_debug(
+                       "%s: Failed to read dll_module stuct for 0x%x.\n",
+                       __func__, module_dsp_addr);
+                       break;
+               }
+
+               /* Update info regarding the _next_ module in the list. */
+               module_dsp_addr = module_struct->next_module;
+               module_size = module_struct->next_module_size;
+
+               pr_debug("%s: next module 0x%x %d, this module num sects %d\n",
+                       __func__, module_dsp_addr, module_size,
+                       module_struct->num_sects);
+
+               /*
+                * The section name strings start immedialty following
+                * the array of dll_sect structures.
+                */
+               sect_str = (char *) &module_struct->
+                                       sects[module_struct->num_sects];
+               pr_err("%s\n", sect_str);
+
+               /*
+                * Advance to the first section name string.
+                * Each string follows the one before.
+                */
+               sect_str += strlen(sect_str) + 1;
+
+               /* Access each dll_sect structure and its name string. */
+               for (sect_ndx = 0;
+                       sect_ndx < module_struct->num_sects; sect_ndx++) {
+                       pr_err("    Section: 0x%x ",
+                               module_struct->sects[sect_ndx].sect_load_adr);
+
+                       if (((u32) sect_str - (u32) module_struct) <
+                               module_struct_size) {
+                               pr_err("%s\n", sect_str);
+                               /* Each string follows the one before. */
+                               sect_str += strlen(sect_str)+1;
+                       } else {
+                               pr_err("<string error>\n");
+                               pr_debug("%s: section name sting address "
+                                       "is invalid %p\n", __func__, sect_str);
+                       }
+               }
+       }
+func_end:
+       kfree(module_struct);
 }
+
diff --git a/drivers/dsp/bridge/wmd/ue_deh.c b/drivers/dsp/bridge/wmd/ue_deh.c
index 75a62b0..fde82ca 100644
--- a/drivers/dsp/bridge/wmd/ue_deh.c
+++ b/drivers/dsp/bridge/wmd/ue_deh.c
@@ -53,6 +53,15 @@
 #include "_tiomap_pwr.h"
 #include <dspbridge/io_sm.h>

+#include <plat/dmtimer.h>
+
+/* GP Timer number to trigger interrupt for MMU-fault ISR on DSP */
+#define GPTIMER_FOR_DSP_MMU_FAULT      8
+/* Bit mask to enable overflow interrupt */
+#define GPTIMER_IRQ_OVERFLOW           2
+/* Max time to check for GP Timer IRQ */
+#define GPTIMER_IRQ_WAIT_MAX_CNT       1000
+
 static struct hw_mmu_map_attrs_t map_attrs = { HW_LITTLE_ENDIAN,
        HW_ELEM_SIZE16BIT,
        HW_MMU_CPUES
@@ -61,6 +70,9 @@ static struct hw_mmu_map_attrs_t map_attrs = { HW_LITTLE_ENDIAN,
 #define VIRT_TO_PHYS(x)       ((x) - PAGE_OFFSET + PHYS_OFFSET)

 static u32 dummy_va_addr;
+
+static struct omap_dm_timer *timer;
+
 /*
  *  ======== bridge_deh_create ========
  *      Creates DEH manager object.
@@ -126,6 +138,14 @@ dsp_status bridge_deh_create(OUT struct deh_mgr **phDehMgr,
                bridge_deh_destroy((struct deh_mgr *)deh_mgr_obj);
                *phDehMgr = NULL;
        } else {
+               timer = omap_dm_timer_request_specific(
+                                       GPTIMER_FOR_DSP_MMU_FAULT);
+               if (timer)
+                       omap_dm_timer_disable(timer);
+               else {
+                       pr_err("%s:GPTimer not available\n", __func__);
+                       return -ENODEV;
+               }
                *phDehMgr = (struct deh_mgr *)deh_mgr_obj;
        }

@@ -157,6 +177,9 @@ dsp_status bridge_deh_destroy(struct deh_mgr *hdeh_mgr)

                /* Deallocate the DEH manager object */
                MEM_FREE_OBJECT(deh_mgr_obj);
+               /* The GPTimer is no longer needed */
+               omap_dm_timer_free(timer);
+               timer = NULL;
        }

        return status;
@@ -199,6 +222,7 @@ void bridge_deh_notify(struct deh_mgr *hdeh_mgr, u32 ulEventMask, u32 dwErrInfo)
        extern u32 fault_addr;
        struct cfg_hostres resources;
        hw_status hw_status_obj;
+       u32 cnt = 0;

        status = cfg_get_host_resources((struct cfg_devnode *)
                                        drv_get_first_dev_extension(),
@@ -222,6 +246,9 @@ void bridge_deh_notify(struct deh_mgr *hdeh_mgr, u32 ulEventMask, u32 dwErrInfo)
                        printk(KERN_ERR
                               "bridge_deh_notify: DSP_SYSERROR, err_info "
                               "= 0x%x\n", dwErrInfo);
+                       dump_dl_modules(dev_context);
+                       dump_dsp_stack(dev_context);
+
                        break;
                case DSP_MMUFAULT:
                        /* MMU fault routine should have set err info
@@ -246,6 +273,10 @@ void bridge_deh_notify(struct deh_mgr *hdeh_mgr, u32 ulEventMask, u32 dwErrInfo)
                                         ((u32) dummy_va_addr, PG_SIZE4K));
                        dev_context = (struct wmd_dev_context *)
                            deh_mgr_obj->hwmd_context;
+
+                       print_dsp_trace_buffer(dev_context);
+                       dump_dl_modules(dev_context);
+
                        /* Reset the dynamic mmu index to fixed count if it
                         * exceeds 31. So that the dynmmuindex is always
                         * between the range of standard/fixed entries
@@ -262,12 +293,47 @@ void bridge_deh_notify(struct deh_mgr *hdeh_mgr, u32 ulEventMask, u32 dwErrInfo)
                                                   HW_PAGE_SIZE4KB, 1,
                                                   &map_attrs, HW_SET, HW_SET);
                        }
-                       /* send an interrupt to DSP */
-                       omap_mbox_msg_send(dev_context->mbox,
-                                               MBX_DEH_CLASS | MBX_DEH_EMMU);
+                       /*
+                        * Send a GP Timer interrupt to DSP
+                        * The DSP expects a GP timer interrupt after an
+                        * MMU-Fault Request GPTimer
+                        */
+                       if (timer) {
+                               omap_dm_timer_enable(timer);
+                               /* Enable overflow interrupt */
+                               omap_dm_timer_set_int_enable(timer,
+                                               GPTIMER_IRQ_OVERFLOW);
+                               /*
+                                * Set counter value to overflow counter after
+                                * one tick and start timer
+                                */
+                               omap_dm_timer_set_load_start(timer, 0,
+                                                               0xfffffffe);
+
+                               /* Wait 80us for timer to overflow */
+                               udelay(80);
+
+                               /*
+                                * Check interrupt status and
+                                * wait for interrupt
+                                */
+                               cnt = 0;
+                               while (!(omap_dm_timer_read_status(timer) &
+                                       GPTIMER_IRQ_OVERFLOW)) {
+                                       if (cnt++ >=
+                                               GPTIMER_IRQ_WAIT_MAX_CNT) {
+                                               pr_err("%s: GPTimer interrupt"
+                                                       " failed\n", __func__);
+                                               break;
+                                       }
+                               }
+                       }
+
                        /* Clear MMU interrupt */
                        hw_mmu_event_ack(resources.dw_dmmu_base,
                                         HW_MMU_TRANSLATION_FAULT);
+                       dump_dsp_stack(deh_mgr_obj->hwmd_context);
+                       omap_dm_timer_disable(timer);
                        break;
 #ifdef CONFIG_BRIDGE_NTFY_PWRERR
                case DSP_PWRERROR:
@@ -307,8 +373,6 @@ void bridge_deh_notify(struct deh_mgr *hdeh_mgr, u32 ulEventMask, u32 dwErrInfo)
                dev_context->dw_brd_state = BRD_ERROR;
                /* Disable all the clocks that were enabled by DSP */
                (void)dsp_peripheral_clocks_disable(dev_context, NULL);
-               /* Call DSP Trace Buffer */
-               print_dsp_trace_buffer(hdeh_mgr->hwmd_context);
                /*
                 * Avoid the subsequent WDT if it happens once,
                 * also If fatal error occurs
--
1.6.0.4


^ permalink raw reply related	[flat|nested] 8+ messages in thread