/**
* mmap_user_to_isp - Maps user memory in to kernel space and then maps
* kernel memory to isp address space.
* @src: Pointer to user buffer info.
* @dest: Pointer to internal buffer to save map info.
*
* Return 0 on success, -1 otherwise.
**/
int map_user_to_kernel(struct hp3a_buffer *src, struct hp3a_internal_buffer *dest)
{
dest->pages = map_user_memory((unsigned long)src->addr,
src->buffer_size);
if (likely(dest->pages != NULL)) {
dest->buffer_size = src->buffer_size;
dest->user_addr = src->addr;
dest->isp_addr = 0;
return 0;
}
return -1;
}
int main(int argc, char** argv){
// get an IGAccelGLContext
gl_context = get_user_client("IOAccelerator", 1);
// get a IGAccelSharedUserClient
mach_port_t shared = get_user_client("IOAccelerator", 6);
// connect the gl_context to the shared UC so we can actually use it:
kern_return_t err = IOConnectAddClient(gl_context, shared);
if (err != KERN_SUCCESS){
printf("IOConnectAddClient error: %x\n", err);
return 0;
}
printf("added client to the shared UC\n");
handle = map_user_memory(gl_context);
OSSpinLockLock(&lock);
pthread_t t;
pthread_create(&t, NULL, (void*) go, NULL);
usleep(100000);
OSSpinLockUnlock(&lock);
unmap_user_memory(gl_context, handle);
printf("called unmap from main process thread\n");
pthread_join(t, NULL);
return 0;
}
int setup_job(ibmuftian_fpga *fpga, void *ioctl_data, unsigned type)
{
ibmuftian_job * job = kzalloc(sizeof(ibmuftian_job),GFP_KERNEL);
mem_buff *mem_ioctl = NULL;
ioctl_inst *inst_ioctl = NULL;
ibmuftian_engn * engn = NULL;
int inst_bd = 0, data_bd = 0, total_bd = 0,
inst_malloc = 0, data_malloc = 0, inst_pg_num = 0,
data_pg_num = 0, max_bd = 0, loop_var = 0, ret = SUCCESS, dirtied = 0, err = 0, buf_id = 0;
unsigned long max_data_size;
sgt_container *sgl_data;
dma_addr_t inst_dma_addr = 0;
enum dma_data_direction direction = DMA_BIDIRECTIONAL; //initialization.
struct page **inst_pgs, **data_pgs;
void *inst_kernel_ptr, *data_kernel_ptr;
bd_bookeeping *bd_ptr;
if(type == INST)
{
PRINT(DBG_PRAM({IOCTL_DBG}), "inst ioctl");
inst_ioctl = (ioctl_inst *)ioctl_data;
mem_ioctl = &inst_ioctl->data;
job->engn_no = inst_ioctl->eng_num;
}
else
{
PRINT(DBG_PRAM({IOCTL_DBG}), "data ioctl");
mem_ioctl = (mem_buff *)ioctl_data;
job->engn_no = 0;
}
switch(type)
{
case(INST):
{
inst_bd = 1;
if((inst_dma_addr = map_user_memory(fpga->device_info.pdev,
(unsigned long) inst_ioctl->inst.host_ptr,
(unsigned long) (inst_ioctl->inst.host_ptr + inst_ioctl->inst.buff_size),
DMA_TO_DEVICE,
&inst_malloc,
&inst_pgs,
&inst_pg_num,
&inst_kernel_ptr)) == FAILURE)
{
PRINT(DBG_PRAM({IOCTL_DBG, ERR_DBG}), "map user memory failed");
return -ENOMEM;
}
}
case(WRITE_MEM):
{
direction = DMA_TO_DEVICE;
break;
}
case(READ_MEM):
{
direction = DMA_FROM_DEVICE;
dirtied = DIRTY;
break;
}
}
max_data_size = MAX_DATA_SEGS*DMA_DATA_SIZE;
if(fpga->fpga_info.bit.board_type == FIN)
max_bd = TOTAL_FIN_MEM_SIZE/max_data_size;
else if(fpga->fpga_info.bit.board_type == WRASSE)
max_bd = TOTAL_WRASSE_MEM_SIZE/max_data_size;
if((data_bd = map_user_pages(&sgl_data,
(unsigned long) mem_ioctl->host_ptr,
(unsigned long)(mem_ioctl->host_ptr + mem_ioctl->buff_size),
direction,
max_data_size,
&data_malloc,
&max_bd,
&data_pgs,
&data_pg_num,
&data_kernel_ptr)) == FAILURE)
{
PRINT(DBG_PRAM({IOCTL_DBG, ERR_DBG}), "map user pages failed");
return -ENOMEM;
}
total_bd = data_bd + inst_bd;
PRINT(DBG_PRAM({IOCTL_DBG}), "data bd = %d inst bd %d", data_bd, inst_bd);
job->pdev = fpga->device_info.pdev;
job->total_bd = total_bd;
job->job_type = type;
init_completion(&(job->job_completion));
atomic_set(&job->bd_count, total_bd);
job->bd = kzalloc(sizeof(bd_bookeeping)*total_bd, GFP_KERNEL);
memset(job->bd, ZERO, total_bd * sizeof(bd_bookeeping));
bd_ptr = job->bd;
engn = fpga->engns.engines[job->engn_no];
if(engn->aborted)
{
PRINT(DBG_PRAM({IOCTL_DBG, ERR_DBG}), "Resetting engine from previous abort");
reset_aborted_engn(engn);
engn->aborted = 0;
}
PRINT(DBG_PRAM({IOCTL_DBG}), "engn id = %d totalbd %d", engn->id, total_bd);
spin_lock(&engn->id_lock);
if(((unsigned short)(engn->bd_id + total_bd) < engn->bd_id))
engn->bd_id = 0;
buf_id = engn->bd_id;
engn->bd_id = engn->bd_id + total_bd;
spin_unlock(&engn->id_lock);
for(loop_var = 0;loop_var < total_bd; loop_var++)
{
bd_ptr[loop_var].bd_num = ++buf_id;
if(!loop_var)
job->bd_tag_start_id = bd_ptr[loop_var].bd_num;
bd_ptr[loop_var].bd_state = INIT;
if((loop_var == BD_IN_INST_IOCTL - LAST_MEM_BD) && inst_bd)
{
init_completion((&bd_ptr[loop_var].inst_bookeeping.ibd_completion));
bd_ptr[loop_var].set_interrupt = SET_INTERRUPT;
bd_ptr[loop_var].inst_bookeeping.complete = 1;
}
if(!(bd_ptr[loop_var].bd_num % INTERRUPT_ENABLE) || (loop_var == total_bd - 1))
bd_ptr[loop_var].set_interrupt = SET_INTERRUPT;
bd_ptr[loop_var].parent_job = &job;
bd_ptr[loop_var].bd_type = type;
if((loop_var == (total_bd-1)) && inst_bd)
{
bd_ptr[loop_var].inst_mem = INST_IOCTL;
bd_ptr[loop_var].inst_dma_addr = inst_dma_addr;
bd_ptr[loop_var].mem_addr.inst.count = inst_bd;
bd_ptr[loop_var].mem_addr.inst.len = inst_ioctl->inst.buff_size;
bd_ptr[loop_var].mem_addr.inst.offset = 0;
bd_ptr[loop_var].mem_addr.inst.src = NULL;
bd_ptr[loop_var].mem_addr.inst.dst = inst_ioctl->inst.host_ptr;
}
else
{
bd_ptr[loop_var].inst_mem = MEM_IOCTL;
bd_ptr[loop_var].sg_data = sgl_data[loop_var].sgt;
bd_ptr[loop_var].mem_addr.data.count = data_bd;
bd_ptr[loop_var].mem_addr.data.offset = 0;
bd_ptr[loop_var].mem_addr.data.len = sgl_data[loop_var].sgt_len;
if(type == READ_MEM)
{
bd_ptr[loop_var].mem_addr.data.src = (void *)(mem_ioctl->uta_ptr + sgl_data[loop_var].sgt_offset);
bd_ptr[loop_var].mem_addr.data.dst = NULL;
if((ret = dma_map_sg(&fpga->device_info.pdev->dev,
bd_ptr[loop_var].sg_data->sgl,
bd_ptr[loop_var].sg_data->nents,
DMA_FROM_DEVICE)) <= 0)
{
PRINT(DBG_PRAM({IOCTL_DBG, ERR_DBG}), "dma map sg failed");
return ret;
}
}
else
{
bd_ptr[loop_var].mem_addr.data.dst = (void *)(mem_ioctl->uta_ptr + sgl_data[loop_var].sgt_offset);
bd_ptr[loop_var].mem_addr.data.src = NULL;
if((ret = dma_map_sg(&fpga->device_info.pdev->dev,
bd_ptr[loop_var].sg_data->sgl,
bd_ptr[loop_var].sg_data->nents,
DMA_TO_DEVICE)) <= 0)
{
PRINT(DBG_PRAM({IOCTL_DBG, ERR_DBG}), "dma map sg failed");
return ret;
}
}
}
if(type == INST)
{
bd_ptr[loop_var].gprs.enable_mask = inst_ioctl->reg_init.enable_mask;
bd_ptr[loop_var].gprs.reg_val = inst_ioctl->reg_init.reg_val;
}
bd_ptr[loop_var].done = IN_PROGRESS;
setup_timer(&(bd_ptr[loop_var].bd_timer), &bd_timed_out, (unsigned long)&bd_ptr[loop_var]);
}
spin_lock_bh(&engn->jobs.job_queue_lock);
list_add(&(job->list), &(engn->jobs.job_queue));
spin_unlock_bh(&engn->jobs.job_queue_lock);
if(build_send_bd(engn, job))
{
PRINT(DBG_PRAM({IOCTL_DBG, ERR_DBG}), "failed to build bd and ring door bell");
goto clean_exit;
}
PRINT(DBG_PRAM({IOCTL_DBG}), "ibd sent waiting for it to complete");
if((ret = wait_for_completion_interruptible_timeout(&job->job_completion,JOB_COMP_TIMEOUT)) <= ZERO)
{
if(ret < ZERO)
{
PRINT(DBG_PRAM({IOCTL_DBG, ERR_DBG}), "wait returned negative value restart system");
for(loop_var = 0;loop_var < total_bd; loop_var++)
{
if(bd_ptr[loop_var].done != DONE)
{
del_timer(&bd_ptr[loop_var].bd_timer);
}
}
spin_lock_bh(&engn->jobs.job_queue_lock);
list_del(&job->list);
complete_all(&job->job_completion);
spin_unlock_bh(&engn->jobs.job_queue_lock);
engn->aborted = 1;
ret = -ERESTARTSYS;
err = FAILURE;
}
else
{
PRINT(DBG_PRAM({IOCTL_DBG, ERR_DBG}), "timer expired job with bd id %d and length %d probably stuck", job->bd_tag_start_id, job->total_bd);
ret = -ETIMEDOUT;
err = FAILURE;
}
}
clean_exit:
for(loop_var = 0; loop_var < total_bd; loop_var++)
{
if(bd_ptr[loop_var].inst_mem == MEM_IOCTL)
{
if(bd_ptr[loop_var].bd_type == READ_MEM)
{
dma_unmap_sg(&fpga->device_info.pdev->dev,
bd_ptr[loop_var].sg_data->sgl,
bd_ptr[loop_var].sg_data->nents,
DMA_FROM_DEVICE);
}
else
{
dma_map_sg(&fpga->device_info.pdev->dev,
bd_ptr[loop_var].sg_data->sgl,
bd_ptr[loop_var].sg_data->nents,
DMA_TO_DEVICE);
}
}
}
if(type == INST)
{
unmap_user_memory(fpga->device_info.pdev,
inst_dma_addr,
direction,
inst_malloc,
inst_pgs,
inst_pg_num,
inst_kernel_ptr,
inst_ioctl->inst.buff_size);
}
unmap_user_pages(sgl_data,
dirtied,
data_bd,
data_malloc,
max_bd,
data_pgs,
data_pg_num,
data_kernel_ptr);
if(type == READ_MEM)
del_timer(&engn->bar0->interrupt_service.obd_comp_timer);
else
del_timer(&engn->bar0->interrupt_service.ibd_comp_timer);
ZERO_AND_FREE(job->bd);
ZERO_AND_FREE(job);
if(err)
return ret;
else
return SUCCESS;
//retry_job:
// return FAILURE; // space holder change later
//do not delete job here we will write the logic to redeploy the job for number of times if the thing fails.
}