- 根目录:
- drivers
- staging
- csr
- csr_wifi_hip_dump.c
/*****************************************************************************
(c) Cambridge Silicon Radio Limited 2012
All rights reserved and confidential information of CSR
Refer to LICENSE.txt included with this source for details
on the license terms.
*****************************************************************************/
/*
* ---------------------------------------------------------------------------
* FILE: csr_wifi_hip_dump.c
*
* PURPOSE:
* Routines for retrieving and buffering core status from the UniFi
*
* ---------------------------------------------------------------------------
*/
#include <linux/slab.h>
#include "csr_wifi_hip_unifi.h"
#include "csr_wifi_hip_unifiversion.h"
#include "csr_wifi_hip_card.h"
/* Locations to capture in dump (XAP words) */
#define HIP_CDUMP_FIRST_CPUREG (0xFFE0) /* First CPU register */
#define HIP_CDUMP_FIRST_LO (0) /* Start of low address range */
#define HIP_CDUMP_FIRST_HI_MAC (0x3C00) /* Start of MAC high area */
#define HIP_CDUMP_FIRST_HI_PHY (0x1C00) /* Start of PHY high area */
#define HIP_CDUMP_FIRST_SH (0) /* Start of shared memory area */
#define HIP_CDUMP_NCPUREGS (10) /* No. of 16-bit XAP registers */
#define HIP_CDUMP_NWORDS_LO (0x0100) /* Low area size in 16-bit words */
#define HIP_CDUMP_NWORDS_HI (0x0400) /* High area size in 16-bit words */
#define HIP_CDUMP_NWORDS_SH (0x0500) /* Shared memory area size, 16-bit words */
#define HIP_CDUMP_NUM_ZONES 7 /* Number of UniFi memory areas to capture */
/* Mini-coredump state */
typedef struct coredump_buf
{
u16 count; /* serial number of dump */
u32 timestamp; /* host's system time at capture */
s16 requestor; /* request: 0=auto dump, 1=manual */
u16 chip_ver;
u32 fw_ver;
u16 *zone[HIP_CDUMP_NUM_ZONES];
struct coredump_buf *next; /* circular list */
struct coredump_buf *prev; /* circular list */
} coredump_buffer;
/* Structure used to describe a zone of chip memory captured by mini-coredump */
struct coredump_zone
{
unifi_coredump_space_t space; /* XAP memory space this zone covers */
enum unifi_dbg_processors_select cpu; /* XAP CPU core selector */
u32 gp; /* Generic Pointer to memory zone on XAP */
u16 offset; /* 16-bit XAP word offset of zone in memory space */
u16 length; /* Length of zone in XAP words */
};
static CsrResult unifi_coredump_from_sdio(card_t *card, coredump_buffer *dump_buf);
static CsrResult unifi_coredump_read_zones(card_t *card, coredump_buffer *dump_buf);
static CsrResult unifi_coredump_read_zone(card_t *card, u16 *zone,
const struct coredump_zone *def);
static s32 get_value_from_coredump(const coredump_buffer *dump,
const unifi_coredump_space_t space, const u16 offset);
/* Table of chip memory zones we capture on mini-coredump */
static const struct coredump_zone zonedef_table[HIP_CDUMP_NUM_ZONES] = {
{ UNIFI_COREDUMP_MAC_REG, UNIFI_PROC_MAC, UNIFI_MAKE_GP(REGISTERS, HIP_CDUMP_FIRST_CPUREG * 2), HIP_CDUMP_FIRST_CPUREG, HIP_CDUMP_NCPUREGS },
{ UNIFI_COREDUMP_PHY_REG, UNIFI_PROC_PHY, UNIFI_MAKE_GP(REGISTERS, HIP_CDUMP_FIRST_CPUREG * 2), HIP_CDUMP_FIRST_CPUREG, HIP_CDUMP_NCPUREGS },
{ UNIFI_COREDUMP_SH_DMEM, UNIFI_PROC_INVALID, UNIFI_MAKE_GP(SH_DMEM, HIP_CDUMP_FIRST_SH * 2), HIP_CDUMP_FIRST_SH, HIP_CDUMP_NWORDS_SH },
{ UNIFI_COREDUMP_MAC_DMEM, UNIFI_PROC_MAC, UNIFI_MAKE_GP(MAC_DMEM, HIP_CDUMP_FIRST_LO * 2), HIP_CDUMP_FIRST_LO, HIP_CDUMP_NWORDS_LO },
{ UNIFI_COREDUMP_MAC_DMEM, UNIFI_PROC_MAC, UNIFI_MAKE_GP(MAC_DMEM, HIP_CDUMP_FIRST_HI_MAC * 2), HIP_CDUMP_FIRST_HI_MAC, HIP_CDUMP_NWORDS_HI },
{ UNIFI_COREDUMP_PHY_DMEM, UNIFI_PROC_PHY, UNIFI_MAKE_GP(PHY_DMEM, HIP_CDUMP_FIRST_LO * 2), HIP_CDUMP_FIRST_LO, HIP_CDUMP_NWORDS_LO },
{ UNIFI_COREDUMP_PHY_DMEM, UNIFI_PROC_PHY, UNIFI_MAKE_GP(PHY_DMEM, HIP_CDUMP_FIRST_HI_PHY * 2), HIP_CDUMP_FIRST_HI_PHY, HIP_CDUMP_NWORDS_HI },
};
/*
* ---------------------------------------------------------------------------
* unifi_coredump_request_at_next_reset
*
* Request that a mini-coredump is performed when the driver has
* completed resetting the UniFi device.
*
* Arguments:
* card Pointer to card struct
* enable If non-zero, sets the request.
* If zero, cancels any pending request.
*
* Returns:
* CSR_RESULT_SUCCESS or CSR HIP error code
*
* Notes:
* This function is typically called once the driver has detected that
* the UniFi device has become unresponsive due to crash, or internal
* watchdog reset. The driver must reset it to regain communication and,
* immediately after that, the mini-coredump can be captured.
* ---------------------------------------------------------------------------
*/
CsrResult unifi_coredump_request_at_next_reset(card_t *card, s8 enable)
{
CsrResult r;
if (enable)
{
unifi_trace(card->ospriv, UDBG2, "Mini-coredump requested after reset\n");
}
if (card == NULL)
{
r = CSR_WIFI_HIP_RESULT_INVALID_VALUE;
}
else
{
card->request_coredump_on_reset = enable?1 : 0;
r = CSR_RESULT_SUCCESS;
}
return r;
}
/*
* ---------------------------------------------------------------------------
* unifi_coredump_handle_request
*
* Performs a coredump now, if one was requested, and clears the request.
*
* Arguments:
* card Pointer to card struct
*
* Returns:
* CSR_RESULT_SUCCESS or CSR HIP error code
*
* Notes:
* ---------------------------------------------------------------------------
*/
CsrResult unifi_coredump_handle_request(card_t *card)
{
CsrResult r = CSR_RESULT_SUCCESS;
if (card == NULL)
{
r = CSR_WIFI_HIP_RESULT_INVALID_VALUE;
}
else
{
if (card->request_coredump_on_reset == 1)
{
card->request_coredump_on_reset = 0;
r = unifi_coredump_capture(card, NULL);
}
}
return r;
}
/*
* ---------------------------------------------------------------------------
* unifi_coredump_capture
*
* Capture the current status of the UniFi device.
* Various registers are buffered for future offline inspection.
*
* Arguments:
* card Pointer to card struct
* req Pointer to request struct, or NULL:
* A coredump requested manually by the user app
* will have a request struct pointer, an automatic
* coredump will have a NULL pointer.
* Returns:
* CSR_RESULT_SUCCESS on success,
* CSR_RESULT_FAILURE SDIO error
* CSR_WIFI_HIP_RESULT_INVALID_VALUE Initialisation not complete
*
* Notes:
* The result is a filled entry in the circular buffer of core dumps,
* values from which can be extracted to userland via an ioctl.
* ---------------------------------------------------------------------------
*/
CsrResult unifi_coredump_capture(card_t *card, struct unifi_coredump_req *req)
{
CsrResult r = CSR_RESULT_SUCCESS;
static u16 dump_seq_no = 1;
u32 time_of_capture;
if (card->dump_next_write == NULL)
{
r = CSR_RESULT_SUCCESS;
goto done;
}
/* Reject forced capture before initialisation has happened */
if (card->helper == NULL)
{
r = CSR_WIFI_HIP_RESULT_INVALID_VALUE;
goto done;
}
/*
* Force a mini-coredump capture right now
*/
time_of_capture = CsrTimeGet(NULL);
unifi_info(card->ospriv, "Mini-coredump capture at t=%u\n", time_of_capture);
/* Wake up the processors so we can talk to them */
r = unifi_set_host_state(card, UNIFI_HOST_STATE_AWAKE);
if (r != CSR_RESULT_SUCCESS)
{
unifi_error(card->ospriv, "Failed to wake UniFi\n");
goto done;
}
CsrThreadSleep(20);
/* Stop both XAPs */
unifi_trace(card->ospriv, UDBG4, "Stopping XAPs for coredump capture\n");
r = unifi_card_stop_processor(card, UNIFI_PROC_BOTH);
if (r != CSR_RESULT_SUCCESS)
{
unifi_error(card->ospriv, "Failed to stop UniFi XAPs\n");
goto done;
}
/* Dump core into the next available slot in the circular list */
r = unifi_coredump_from_sdio(card, card->dump_next_write);
if (r == CSR_RESULT_SUCCESS)
{
/* Record whether the dump was manual or automatic */
card->dump_next_write->requestor = (req?1 : 0);
card->dump_next_write->timestamp = time_of_capture;
/* Advance to the next buffer */
card->dump_next_write->count = dump_seq_no++;
card->dump_cur_read = card->dump_next_write;
card->dump_next_write = card->dump_next_write->next;
/* Sequence no. of zero indicates slot not in use, so handle wrap */
if (dump_seq_no == 0)
{
dump_seq_no = 1;
}
unifi_trace(card->ospriv, UDBG3,
"Coredump (%p), SeqNo=%d, cur_read=%p, next_write=%p\n",
req,
card->dump_cur_read->count,
card->dump_cur_read, card->dump_next_write);
}
/* Start both XAPs */
unifi_trace(card->ospriv, UDBG4, "Restart XAPs after coredump\n");
r = card_start_processor(card, UNIFI_PROC_BOTH);
if (r != CSR_RESULT_SUCCESS)
{
unifi_error(card->ospriv, "Failed to start UniFi XAPs\n");
goto done;
}
done:
return r;
} /* unifi_coredump_capture() */
/*
* ---------------------------------------------------------------------------
* get_value_from_coredump
*
*
*
* Arguments:
* dump Pointer to buffered coredump data
* offset_in_space XAP memory space to retrieve from the buffer (there
* may be more than one zone covering the same memory
* space, but starting from different offsets).
* offset Offset within the XAP memory space to be retrieved
*
* Returns:
* >=0 Register value on success
* <0 Register out of range of any captured zones
*
* Notes:
* ---------------------------------------------------------------------------
*/
static s32 get_value_from_coredump(const coredump_buffer *coreDump,
const unifi_coredump_space_t space,
const u16 offset_in_space)
{
s32 r = -1;
u16 offset_in_zone;
u32 zone_end_offset;
s32 i;
const struct coredump_zone *def = &zonedef_table[0];
/* Search zone def table for a match with the requested memory space */
for (i = 0; i < HIP_CDUMP_NUM_ZONES; i++, def++)
{
if (space == def->space)
{
zone_end_offset = def->offset + def->length;
/* Is the space offset contained in this zone? */
if (offset_in_space < zone_end_offset &&
offset_in_space >= def->offset)
{
/* Calculate the offset of data within the zone buffer */
offset_in_zone = offset_in_space - def->offset;
r = (s32) * (coreDump->zone[i] + offset_in_zone);
unifi_trace(NULL, UDBG6,
"sp %d, offs 0x%04x = 0x%04x (in z%d 0x%04x->0x%04x)\n",
space, offset_in_space, r,
i, def->offset, zone_end_offset - 1);
break;
}
}
}
return r;
}
/*
* ---------------------------------------------------------------------------
* unifi_coredump_get_value
*
* Retrieve the value of a register buffered from a previous core dump,
* so that it may be reported back to application code.
*
* Arguments:
* card Pointer to card struct
* req_reg Pointer to request parameter partially filled. This
* function puts in the values retrieved from the dump.
*
* Returns:
* CSR_RESULT_SUCCESS on success, or:
* CSR_WIFI_HIP_RESULT_INVALID_VALUE Null parameter error
* CSR_WIFI_HIP_RESULT_RANGE Register out of range
* CSR_WIFI_HIP_RESULT_NOT_FOUND Dump index not (yet) captured
*
* Notes:
* ---------------------------------------------------------------------------
*/
CsrResult unifi_coredump_get_value(card_t *card, struct unifi_coredump_req *req)
{
CsrResult r;
s32 i = 0;
coredump_buffer *find_dump = NULL;
if (req == NULL || card == NULL)
{
r = CSR_WIFI_HIP_RESULT_INVALID_VALUE;
goto done;
}
req->value = -1;
if (card->dump_buf == NULL)
{
unifi_trace(card->ospriv, UDBG2, "No coredump buffers\n");
r = CSR_WIFI_HIP_RESULT_NOT_FOUND; /* Coredumping disabled */
goto done;
}
if (card->dump_cur_read == NULL)
{
unifi_trace(card->ospriv, UDBG4, "No coredumps captured\n");
r = CSR_WIFI_HIP_RESULT_NOT_FOUND; /* No coredump yet captured */
goto done;
}
/* Find the requested dump buffer */
switch (req->index)
{
case 0: /* Newest */
find_dump = card->dump_cur_read;
break;
case -1: /* Oldest: The next used slot forward */
for (find_dump = card->dump_cur_read->next;
(find_dump->count == 0) && (find_dump != card->dump_cur_read);
find_dump = card->dump_cur_read->next)
{
}
break;
default: /* Number of steps back from current read position */
for (i = 0, find_dump = card->dump_cur_read;
i < req->index;
i++, find_dump = find_dump->prev)
{
/* Walk the list for the index'th entry, but
* stop when about to wrap. */
unifi_trace(card->ospriv, UDBG6,
"%d: %d, @%p, p=%p, n=%p, cr=%p, h=%p\n",
i, find_dump->count, find_dump, find_dump->prev,
find_dump->next, card->dump_cur_read, card->dump_buf);
if (find_dump->prev == card->dump_cur_read)
{
/* Wrapped but still not found, index out of range */
if (i != req->index)
{
unifi_trace(card->ospriv, UDBG6,
"Dump index %d not found %d\n", req->index, i);
r = CSR_WIFI_HIP_RESULT_NOT_FOUND;
goto done;
}
break;
}
}
break;
}
/* Check if the slot is actually filled with a core dump */
if (find_dump->count == 0)
{
unifi_trace(card->ospriv, UDBG4, "Not captured %d\n", req->index);
r = CSR_WIFI_HIP_RESULT_NOT_FOUND;
goto done;
}
unifi_trace(card->ospriv, UDBG6, "Req index %d, found seq %d at step %d\n",
req->index, find_dump->count, i);
/* Find the appropriate entry in the buffer */
req->value = get_value_from_coredump(find_dump, req->space, (u16)req->offset);
if (req->value < 0)
{
r = CSR_WIFI_HIP_RESULT_RANGE; /* Un-captured register */
unifi_trace(card->ospriv, UDBG4,
"Can't read space %d, reg 0x%x from coredump buffer %d\n",
req->space, req->offset, req->index);
}
else
{
r = CSR_RESULT_SUCCESS;
}
/* Update the private request structure with the found values */
req->chip_ver = find_dump->chip_ver;
req->fw_ver = find_dump->fw_ver;
req->timestamp = find_dump->timestamp;
req->requestor = find_dump->requestor;
req->serial = find_dump->count;
done:
return r;
} /* unifi_coredump_get_value() */
/*
* ---------------------------------------------------------------------------
* unifi_coredump_read_zone
*
* Captures a UniFi memory zone into a buffer on the host
*
* Arguments:
* card Pointer to card struct
* zonebuf Pointer to on-host buffer to dump the memory zone into
* def Pointer to description of the memory zone to read from UniFi.
*
* Returns:
* CSR_RESULT_SUCCESS on success, or:
* CSR_RESULT_FAILURE SDIO error
* CSR_WIFI_HIP_RESULT_INVALID_VALUE Parameter error
*
* Notes:
* It is assumed that the caller has already stopped the XAPs
* ---------------------------------------------------------------------------
*/
static CsrResult unifi_coredump_read_zone(card_t *card, u16 *zonebuf, const struct coredump_zone *def)
{
CsrResult r;
if (zonebuf == NULL || def == NULL)
{
r = CSR_WIFI_HIP_RESULT_INVALID_VALUE;
goto done;
}
/* Select XAP CPU if necessary */
if (def->cpu != UNIFI_PROC_INVALID)
{
if (def->cpu != UNIFI_PROC_MAC && def->cpu != UNIFI_PROC_PHY)
{
r = CSR_WIFI_HIP_RESULT_INVALID_VALUE;
goto done;
}
r = unifi_set_proc_select(card, def->cpu);
if (r != CSR_RESULT_SUCCESS)
{
goto done;
}
}
unifi_trace(card->ospriv, UDBG4,
"Dump sp %d, offs 0x%04x, 0x%04x words @GP=%08x CPU %d\n",
def->space, def->offset, def->length, def->gp, def->cpu);
/* Read on-chip RAM (byte-wise) */
r = unifi_card_readn(card, def->gp, zonebuf, (u16)(def->length * 2));
if (r == CSR_WIFI_HIP_RESULT_NO_DEVICE)
{
goto done;
}
if (r != CSR_RESULT_SUCCESS)
{
unifi_error(card->ospriv, "Can't read UniFi shared data area\n");
goto done;
}
done:
return r;
}
/*
* ---------------------------------------------------------------------------
* unifi_coredump_read_zones
*
* Walks through the table of on-chip memory zones defined in zonedef_table,
* and reads each of them from the UniFi chip
*
* Arguments:
* card Pointer to card struct
* dump_buf Buffer into which register values will be dumped
*
* Returns:
* CSR_RESULT_SUCCESS on success, or:
* CSR_RESULT_FAILURE SDIO error
* CSR_WIFI_HIP_RESULT_INVALID_VALUE Parameter error
*
* Notes:
* It is assumed that the caller has already stopped the XAPs
* ---------------------------------------------------------------------------
*/
static CsrResult unifi_coredump_read_zones(card_t *card, coredump_buffer *dump_buf)
{
CsrResult r = CSR_RESULT_SUCCESS;
s32 i;
/* Walk the table of coredump zone definitions and read them from the chip */
for (i = 0;
(i < HIP_CDUMP_NUM_ZONES) && (r == 0);
i++)
{
r = unifi_coredump_read_zone(card, dump_buf->zone[i], &zonedef_table[i]);
}
return r;
}
/*
* ---------------------------------------------------------------------------
* unifi_coredump_from_sdio
*
* Capture the status of the UniFi processors, over SDIO
*
* Arguments:
* card Pointer to card struct
* reg_buffer Buffer into which register values will be dumped
*
* Returns:
* CSR_RESULT_SUCCESS on success, or:
* CSR_RESULT_FAILURE SDIO error
* CSR_WIFI_HIP_RESULT_INVALID_VALUE Parameter error
*
* Notes:
* ---------------------------------------------------------------------------
*/
static CsrResult unifi_coredump_from_sdio(card_t *card, coredump_buffer *dump_buf)
{
u16 val;
CsrResult r;
u32 sdio_addr;
if (dump_buf == NULL)
{
r = CSR_WIFI_HIP_RESULT_INVALID_VALUE;
goto done;
}
/* Chip and firmware version */
unifi_trace(card->ospriv, UDBG4, "Get chip version\n");
sdio_addr = 2 * ChipHelper_GBL_CHIP_VERSION(card->helper);
if (sdio_addr != 0)
{
r = unifi_read_direct16(card, sdio_addr, &val);
if (r == CSR_WIFI_HIP_RESULT_NO_DEVICE)
{
goto done;
}
if (r != CSR_RESULT_SUCCESS)
{
unifi_error(card->ospriv, "Can't read GBL_CHIP_VERSION\n");
goto done;
}
}
dump_buf->chip_ver = val;
dump_buf->fw_ver = card->build_id;
unifi_trace(card->ospriv, UDBG4, "chip_ver 0x%04x, fw_ver %u\n",
dump_buf->chip_ver, dump_buf->fw_ver);
/* Capture the memory zones required from UniFi */
r = unifi_coredump_read_zones(card, dump_buf);
if (r == CSR_WIFI_HIP_RESULT_NO_DEVICE)
{
goto done;
}
if (r != CSR_RESULT_SUCCESS)
{
unifi_error(card->ospriv, "Can't read UniFi memory areas\n");
goto done;
}
done:
return r;
} /* unifi_coredump_from_sdio() */
#ifndef UNIFI_DISABLE_COREDUMP
/*
* ---------------------------------------------------------------------------
* new_coredump_node
*
* Allocates a coredump linked-list node, and links it to the previous.
*
* Arguments:
* ospriv OS context
* prevnode Previous node to link into
*
* Returns:
* Pointer to valid coredump_buffer on success
* NULL on memory allocation failure
*
* Notes:
* Allocates "all or nothing"
* ---------------------------------------------------------------------------
*/
static
coredump_buffer* new_coredump_node(void *ospriv, coredump_buffer *prevnode)
{
coredump_buffer *newnode = NULL;
u16 *newzone = NULL;
s32 i;
u32 zone_size;
/* Allocate node header */
newnode = kzalloc(sizeof(coredump_buffer), GFP_KERNEL);
if (newnode == NULL)
{
return NULL;
}
/* Allocate chip memory zone capture buffers */
for (i = 0; i < HIP_CDUMP_NUM_ZONES; i++)
{
zone_size = sizeof(u16) * zonedef_table[i].length;
newzone = kzalloc(zone_size, GFP_KERNEL);
newnode->zone[i] = newzone;
if (newzone == NULL)
{
unifi_error(ospriv, "Out of memory on coredump zone %d (%d words)\n",
i, zonedef_table[i].length);
break;
}
}
/* Clean up if any zone alloc failed */
if (newzone == NULL)
{
for (i = 0; newnode->zone[i] != NULL; i++)
{
kfree(newnode->zone[i]);
newnode->zone[i] = NULL;
}
}
/* Link to previous node */
newnode->prev = prevnode;
if (prevnode)
{
prevnode->next = newnode;
}
newnode->next = NULL;
return newnode;
}
#endif /* UNIFI_DISABLE_COREDUMP */
/*
* ---------------------------------------------------------------------------
* unifi_coredump_init
*
* Allocates buffers for the automatic SDIO core dump
*
* Arguments:
* card Pointer to card struct
* num_dump_buffers Number of buffers to reserve for coredumps
*
* Returns:
* CSR_RESULT_SUCCESS on success, or:
* CSR_WIFI_HIP_RESULT_NO_MEMORY memory allocation failed
*
* Notes:
* Allocates space in advance, to be used for the last n coredump buffers
* the intention being that the size is sufficient for at least one dump,
* probably several.
* It's probably advisable to have at least 2 coredump buffers to allow
* one to be enquired with the unifi_coredump tool, while leaving another
* free for capturing.
* ---------------------------------------------------------------------------
*/
CsrResult unifi_coredump_init(card_t *card, u16 num_dump_buffers)
{
#ifndef UNIFI_DISABLE_COREDUMP
void *ospriv = card->ospriv;
coredump_buffer *prev = NULL;
coredump_buffer *newnode = NULL;
u32 i = 0;
#endif
card->request_coredump_on_reset = 0;
card->dump_next_write = NULL;
card->dump_cur_read = NULL;
card->dump_buf = NULL;
#ifndef UNIFI_DISABLE_COREDUMP
unifi_trace(ospriv, UDBG1,
"Allocate buffers for %d core dumps\n", num_dump_buffers);
if (num_dump_buffers == 0)
{
goto done;
}
/* Root node */
card->dump_buf = new_coredump_node(ospriv, NULL);
if (card->dump_buf == NULL)
{
goto fail;
}
prev = card->dump_buf;
newnode = card->dump_buf;
/* Add each subsequent node at tail */
for (i = 1; i < num_dump_buffers; i++)
{
newnode = new_coredump_node(ospriv, prev);
if (newnode == NULL)
{
goto fail;
}
prev = newnode;
}
/* Link the first and last nodes to make the list circular */
card->dump_buf->prev = newnode;
newnode->next = card->dump_buf;
/* Set initial r/w access pointers */
card->dump_next_write = card->dump_buf;
card->dump_cur_read = NULL;
unifi_trace(ospriv, UDBG2, "Core dump configured (%d dumps max)\n", i);
done:
#endif
return CSR_RESULT_SUCCESS;
#ifndef UNIFI_DISABLE_COREDUMP
fail:
/* Unwind what we allocated so far */
unifi_error(ospriv, "Out of memory allocating core dump node %d\n", i);
unifi_coredump_free(card);
return CSR_WIFI_HIP_RESULT_NO_MEMORY;
#endif
} /* unifi_coreump_init() */
/*
* ---------------------------------------------------------------------------
* unifi_coredump_free
*
* Free all memory dynamically allocated for core dump
*
* Arguments:
* card Pointer to card struct
*
* Returns:
* None
*
* Notes:
* ---------------------------------------------------------------------------
*/
void unifi_coredump_free(card_t *card)
{
void *ospriv = card->ospriv;
coredump_buffer *node, *del_node;
s16 i = 0;
s16 j;
unifi_trace(ospriv, UDBG2, "Core dump de-configured\n");
if (card->dump_buf == NULL)
{
return;
}
node = card->dump_buf;
do
{
/* Free payload zones */
for (j = 0; j < HIP_CDUMP_NUM_ZONES; j++)
{
kfree(node->zone[j]);
node->zone[j] = NULL;
}
/* Detach */
del_node = node;
node = node->next;
/* Free header */
kfree(del_node);
i++;
} while ((node != NULL) && (node != card->dump_buf));
unifi_trace(ospriv, UDBG3, "Freed %d coredump buffers\n", i);
card->dump_buf = NULL;
card->dump_next_write = NULL;
card->dump_cur_read = NULL;
} /* unifi_coredump_free() */