diff options
Diffstat (limited to 'drivers/staging/csr/csr_wifi_hip_dump.c')
| -rw-r--r-- | drivers/staging/csr/csr_wifi_hip_dump.c | 837 |
1 files changed, 0 insertions, 837 deletions
diff --git a/drivers/staging/csr/csr_wifi_hip_dump.c b/drivers/staging/csr/csr_wifi_hip_dump.c deleted file mode 100644 index 7b7eec49d028..000000000000 --- a/drivers/staging/csr/csr_wifi_hip_dump.c +++ /dev/null @@ -1,837 +0,0 @@ -/***************************************************************************** - - (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() */ - - |