void
ccw_free_request ( ccw_req_t * request )
{
int size_needed;
debug_text_event ( debug_area, 1, "FREE");
debug_int_event ( debug_area, 1, (long)request);
/* Sanity checks */
if ( request == NULL || request->cache == NULL)
BUG();
dechain ( request);
/* Free memory allocated with kmalloc
* make the same decisions as in ccw_alloc_requets */
size_needed = (sizeof (ccw_req_t) + 7) & -8;
if (size_needed + request->datasize <= PAGE_SIZE)
/* We kept the data with the request */
size_needed += (request->datasize + 7) & -8;
else
kfree(request->data);
if (size_needed + request->cplength*sizeof(ccw1_t) > PAGE_SIZE)
/* We kept the CCWs with request */
kfree(request->cpaddr);
kmem_cache_free(request -> cache, request);
}
void ctcm_dbf_longtext(enum ctcm_dbf_names dbf_nix, int level, char *fmt, ...)
{
char dbf_txt_buf[64];
va_list args;
if (!debug_level_enabled(ctcm_dbf[dbf_nix].id, level))
return;
va_start(args, fmt);
vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
va_end(args);
debug_text_event(ctcm_dbf[dbf_nix].id, level, dbf_txt_buf);
}
int
ccwcache_init (void)
{
int rc = 0;
int cachind;
/* initialize variables */
spin_lock_init(&ccwchain_lock);
/* allocate a debug area */
debug_area = debug_register( "ccwcache", 2, 4,sizeof(void*));
if ( debug_area == NULL )
BUG();
debug_register_view(debug_area,&debug_hex_ascii_view);
debug_register_view(debug_area,&debug_raw_view);
debug_text_event ( debug_area, 0, "INIT");
/* First allocate the kmem caches */
for ( cachind = 0; cachind < CCW_NUMBER_CACHES; cachind ++ ) {
int slabsize = SMALLEST_SLAB << cachind;
debug_text_event ( debug_area, 1, "allc");
debug_int_event ( debug_area, 1, slabsize);
sprintf ( ccw_cache_name[cachind],
"%s%d%c", ccw_name_template, slabsize, 0);
ccw_cache[cachind] =
kmem_cache_create( ccw_cache_name[cachind],
slabsize, 0,
CCW_CACHE_SLAB_TYPE,
NULL, NULL );
debug_int_event ( debug_area, 1, (long)ccw_cache[cachind]);
if (ccw_cache[cachind] == NULL)
panic ("Allocation of CCW cache failed\n");
}
return rc;
}
static ssize_t
vmcp_write(struct file *file, const char __user * buff, size_t count,
loff_t * ppos)
{
char *cmd;
struct vmcp_session *session;
if (count > 240)
return -EINVAL;
cmd = kmalloc(count + 1, GFP_KERNEL);
if (!cmd)
return -ENOMEM;
if (copy_from_user(cmd, buff, count)) {
kfree(cmd);
return -EFAULT;
}
cmd[count] = '\0';
session = (struct vmcp_session *)file->private_data;
if (down_interruptible(&session->mutex)) {
kfree(cmd);
return -ERESTARTSYS;
}
if (!session->response)
session->response = (char *)__get_free_pages(GFP_KERNEL
| __GFP_REPEAT | GFP_DMA,
get_order(session->bufsize));
if (!session->response) {
up(&session->mutex);
kfree(cmd);
return -ENOMEM;
}
debug_text_event(vmcp_debug, 1, cmd);
session->resp_size = cpcmd(cmd, session->response,
session->bufsize,
&session->resp_code);
up(&session->mutex);
kfree(cmd);
*ppos = 0; /* reset the file pointer after a command */
return count;
}
/*
* function: zfcp_qdio_handler_error_check
*
* purpose: called by the response handler to determine error condition
*
* returns: error flag
*
*/
static inline int
zfcp_qdio_handler_error_check(struct zfcp_adapter *adapter,
unsigned int status,
unsigned int qdio_error, unsigned int siga_error)
{
int retval = 0;
if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_TRACE)) {
if (status & QDIO_STATUS_INBOUND_INT) {
ZFCP_LOG_TRACE("status is"
" QDIO_STATUS_INBOUND_INT \n");
}
if (status & QDIO_STATUS_OUTBOUND_INT) {
ZFCP_LOG_TRACE("status is"
" QDIO_STATUS_OUTBOUND_INT \n");
}
} // if (ZFCP_LOG_CHECK(ZFCP_LOG_LEVEL_TRACE))
if (unlikely(status & QDIO_STATUS_LOOK_FOR_ERROR)) {
retval = -EIO;
ZFCP_LOG_FLAGS(1, "QDIO_STATUS_LOOK_FOR_ERROR \n");
ZFCP_LOG_INFO("QDIO problem occurred (status=0x%x, "
"qdio_error=0x%x, siga_error=0x%x)\n",
status, qdio_error, siga_error);
if (status & QDIO_STATUS_ACTIVATE_CHECK_CONDITION) {
ZFCP_LOG_FLAGS(2,
"QDIO_STATUS_ACTIVATE_CHECK_CONDITION\n");
}
if (status & QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR) {
ZFCP_LOG_FLAGS(2,
"QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR\n");
}
if (status & QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR) {
ZFCP_LOG_FLAGS(2,
"QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR\n");
}
if (siga_error & QDIO_SIGA_ERROR_ACCESS_EXCEPTION) {
ZFCP_LOG_FLAGS(2, "QDIO_SIGA_ERROR_ACCESS_EXCEPTION\n");
}
if (siga_error & QDIO_SIGA_ERROR_B_BIT_SET) {
ZFCP_LOG_FLAGS(2, "QDIO_SIGA_ERROR_B_BIT_SET\n");
}
switch (qdio_error) {
case 0:
ZFCP_LOG_FLAGS(3, "QDIO_OK");
break;
case SLSB_P_INPUT_ERROR:
ZFCP_LOG_FLAGS(1, "SLSB_P_INPUT_ERROR\n");
break;
case SLSB_P_OUTPUT_ERROR:
ZFCP_LOG_FLAGS(1, "SLSB_P_OUTPUT_ERROR\n");
break;
default:
ZFCP_LOG_NORMAL("bug: unknown QDIO error 0x%x\n",
qdio_error);
break;
}
/* Restarting IO on the failed adapter from scratch */
debug_text_event(adapter->erp_dbf, 1, "qdio_err");
/*
* Since we have been using this adapter, it is save to assume
* that it is not failed but recoverable. The card seems to
* report link-up events by self-initiated queue shutdown.
* That is why we need to clear the the link-down flag
* which is set again in case we have missed by a mile.
*/
zfcp_erp_adapter_reopen(
adapter,
ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
ZFCP_STATUS_COMMON_ERP_FAILED);
}
return retval;
}
/*
* ccw_req_t *ccw_alloc_request ( int cplength, int datasize )
* allocates a ccw_req_t, that
* - can hold a CP of cplength CCWS
* - can hold additional data up to datasize
*/
ccw_req_t *
ccw_alloc_request ( char *magic, int cplength, int datasize )
{
ccw_req_t * request = NULL;
int size_needed;
int data_offset, ccw_offset;
int cachind;
/* Sanity checks */
if ( magic == NULL || datasize > PAGE_SIZE ||
cplength == 0 || (cplength*sizeof(ccw1_t)) > PAGE_SIZE)
BUG();
debug_text_event ( debug_area, 1, "ALLC");
debug_text_event ( debug_area, 1, magic);
debug_int_event ( debug_area, 1, cplength);
debug_int_event ( debug_area, 1, datasize);
/* We try to keep things together in memory */
size_needed = (sizeof (ccw_req_t) + 7) & -8;
data_offset = ccw_offset = 0;
if (size_needed + datasize <= PAGE_SIZE) {
/* Keep data with the request */
data_offset = size_needed;
size_needed += (datasize + 7) & -8;
}
if (size_needed + cplength*sizeof(ccw1_t) <= PAGE_SIZE) {
/* Keep CCWs with request */
ccw_offset = size_needed;
size_needed += cplength*sizeof(ccw1_t);
}
/* determine cache index for the requested size */
for (cachind = 0; cachind < CCW_NUMBER_CACHES; cachind ++ )
if ( size_needed < (SMALLEST_SLAB << cachind) )
break;
/* Try to fulfill the request from a cache */
if ( ccw_cache[cachind] == NULL )
BUG();
request = kmem_cache_alloc ( ccw_cache[cachind], CCW_CACHE_TYPE );
if (request == NULL)
return NULL;
memset ( request, 0, (SMALLEST_SLAB << cachind));
request->cache = ccw_cache[cachind];
/* Allocate memory for the extra data */
if (data_offset == 0) {
/* Allocated memory for extra data with kmalloc */
request->data = (void *) kmalloc(datasize, CCW_CACHE_TYPE );
if (request->data == NULL) {
printk(KERN_WARNING PRINTK_HEADER
"Couldn't allocate data area\n");
kmem_cache_free(request->cache, request);
return NULL;
}
} else
/* Extra data already allocated with the request */
request->data = (void *) ((addr_t) request + data_offset);
/* Allocate memory for the channel program */
if (ccw_offset == 0) {
/* Allocated memory for the channel program with kmalloc */
request->cpaddr = (ccw1_t *) kmalloc(cplength*sizeof(ccw1_t),
CCW_CACHE_TYPE);
if (request->cpaddr == NULL) {
printk (KERN_DEBUG PRINTK_HEADER
"Couldn't allocate ccw area\n");
if (data_offset == 0)
kfree(request->data);
kmem_cache_free(request->cache, request);
return NULL;
}
} else
/* Channel program already allocated with the request */
request->cpaddr = (ccw1_t *) ((addr_t) request + ccw_offset);
memset ( request->data, 0, datasize );
memset ( request->cpaddr, 0, cplength*sizeof(ccw1_t) );
strncpy ( (char *)(&request->magic), magic, 4);
ASCEBC((char *)(&request->magic),4);
request -> cplength = cplength;
request -> datasize = datasize;
/* enqueue request to list of allocated requests */
enchain(request);
debug_int_event ( debug_area, 1, (long)request);
return request;
}