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// SPDX-License-Identifier: GPL-2.0-only
/* Copyright(c) 2022 Intel Corporation */
#include <linux/module.h>
#include <linux/slab.h>
#include "adf_accel_devices.h"
#include "adf_common_drv.h"
#include "adf_transport.h"
#include "adf_transport_access_macros.h"
#include "adf_cfg.h"
#include "adf_cfg_strings.h"
#include "qat_compression.h"
#include "icp_qat_fw.h"
#define SEC ADF_KERNEL_SEC
static struct service_hndl qat_compression;
void qat_compression_put_instance(struct qat_compression_instance *inst)
{
atomic_dec(&inst->refctr);
adf_dev_put(inst->accel_dev);
}
static int qat_compression_free_instances(struct adf_accel_dev *accel_dev)
{
struct qat_compression_instance *inst;
struct list_head *list_ptr, *tmp;
int i;
list_for_each_safe(list_ptr, tmp, &accel_dev->compression_list) {
inst = list_entry(list_ptr,
struct qat_compression_instance, list);
for (i = 0; i < atomic_read(&inst->refctr); i++)
qat_compression_put_instance(inst);
if (inst->dc_tx)
adf_remove_ring(inst->dc_tx);
if (inst->dc_rx)
adf_remove_ring(inst->dc_rx);
list_del(list_ptr);
kfree(inst);
}
return 0;
}
struct qat_compression_instance *qat_compression_get_instance_node(int node)
{
struct qat_compression_instance *inst = NULL;
struct adf_accel_dev *accel_dev = NULL;
unsigned long best = ~0;
struct list_head *itr;
list_for_each(itr, adf_devmgr_get_head()) {
struct adf_accel_dev *tmp_dev;
unsigned long ctr;
int tmp_dev_node;
tmp_dev = list_entry(itr, struct adf_accel_dev, list);
tmp_dev_node = dev_to_node(&GET_DEV(tmp_dev));
if ((node == tmp_dev_node || tmp_dev_node < 0) &&
adf_dev_started(tmp_dev) && !list_empty(&tmp_dev->compression_list)) {
ctr = atomic_read(&tmp_dev->ref_count);
if (best > ctr) {
accel_dev = tmp_dev;
best = ctr;
}
}
}
if (!accel_dev) {
pr_debug_ratelimited("QAT: Could not find a device on node %d\n", node);
/* Get any started device */
list_for_each(itr, adf_devmgr_get_head()) {
struct adf_accel_dev *tmp_dev;
tmp_dev = list_entry(itr, struct adf_accel_dev, list);
if (adf_dev_started(tmp_dev) &&
!list_empty(&tmp_dev->compression_list)) {
accel_dev = tmp_dev;
break;
}
}
}
if (!accel_dev)
return NULL;
best = ~0;
list_for_each(itr, &accel_dev->compression_list) {
struct qat_compression_instance *tmp_inst;
unsigned long ctr;
tmp_inst = list_entry(itr, struct qat_compression_instance, list);
ctr = atomic_read(&tmp_inst->refctr);
if (best > ctr) {
inst = tmp_inst;
best = ctr;
}
}
if (inst) {
if (adf_dev_get(accel_dev)) {
dev_err(&GET_DEV(accel_dev), "Could not increment dev refctr\n");
return NULL;
}
atomic_inc(&inst->refctr);
}
return inst;
}
static int qat_compression_create_instances(struct adf_accel_dev *accel_dev)
{
struct qat_compression_instance *inst;
char key[ADF_CFG_MAX_KEY_LEN_IN_BYTES];
char val[ADF_CFG_MAX_VAL_LEN_IN_BYTES];
unsigned long num_inst, num_msg_dc;
unsigned long bank;
int msg_size;
int ret;
int i;
INIT_LIST_HEAD(&accel_dev->compression_list);
strscpy(key, ADF_NUM_DC, sizeof(key));
ret = adf_cfg_get_param_value(accel_dev, SEC, key, val);
if (ret)
return ret;
ret = kstrtoul(val, 10, &num_inst);
if (ret)
return ret;
for (i = 0; i < num_inst; i++) {
inst = kzalloc_node(sizeof(*inst), GFP_KERNEL,
dev_to_node(&GET_DEV(accel_dev)));
if (!inst) {
ret = -ENOMEM;
goto err;
}
list_add_tail(&inst->list, &accel_dev->compression_list);
inst->id = i;
atomic_set(&inst->refctr, 0);
inst->accel_dev = accel_dev;
inst->build_deflate_ctx = GET_DC_OPS(accel_dev)->build_deflate_ctx;
snprintf(key, sizeof(key), ADF_DC "%d" ADF_RING_DC_BANK_NUM, i);
ret = adf_cfg_get_param_value(accel_dev, SEC, key, val);
if (ret)
return ret;
ret = kstrtoul(val, 10, &bank);
if (ret)
return ret;
snprintf(key, sizeof(key), ADF_DC "%d" ADF_RING_DC_SIZE, i);
ret = adf_cfg_get_param_value(accel_dev, SEC, key, val);
if (ret)
return ret;
ret = kstrtoul(val, 10, &num_msg_dc);
if (ret)
return ret;
msg_size = ICP_QAT_FW_REQ_DEFAULT_SZ;
snprintf(key, sizeof(key), ADF_DC "%d" ADF_RING_DC_TX, i);
ret = adf_create_ring(accel_dev, SEC, bank, num_msg_dc,
msg_size, key, NULL, 0, &inst->dc_tx);
if (ret)
return ret;
msg_size = ICP_QAT_FW_RESP_DEFAULT_SZ;
snprintf(key, sizeof(key), ADF_DC "%d" ADF_RING_DC_RX, i);
ret = adf_create_ring(accel_dev, SEC, bank, num_msg_dc,
msg_size, key, qat_comp_alg_callback, 0,
&inst->dc_rx);
if (ret)
return ret;
inst->dc_data = accel_dev->dc_data;
INIT_LIST_HEAD(&inst->backlog.list);
spin_lock_init(&inst->backlog.lock);
}
return 0;
err:
qat_compression_free_instances(accel_dev);
return ret;
}
static int qat_compression_alloc_dc_data(struct adf_accel_dev *accel_dev)
{
struct device *dev = &GET_DEV(accel_dev);
dma_addr_t obuff_p = DMA_MAPPING_ERROR;
size_t ovf_buff_sz = QAT_COMP_MAX_SKID;
struct adf_dc_data *dc_data = NULL;
u8 *obuff = NULL;
dc_data = devm_kzalloc(dev, sizeof(*dc_data), GFP_KERNEL);
if (!dc_data)
goto err;
obuff = kzalloc_node(ovf_buff_sz, GFP_KERNEL, dev_to_node(dev));
if (!obuff)
goto err;
obuff_p = dma_map_single(dev, obuff, ovf_buff_sz, DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(dev, obuff_p)))
goto err;
dc_data->ovf_buff = obuff;
dc_data->ovf_buff_p = obuff_p;
dc_data->ovf_buff_sz = ovf_buff_sz;
accel_dev->dc_data = dc_data;
return 0;
err:
accel_dev->dc_data = NULL;
kfree(obuff);
devm_kfree(dev, dc_data);
return -ENOMEM;
}
static void qat_free_dc_data(struct adf_accel_dev *accel_dev)
{
struct adf_dc_data *dc_data = accel_dev->dc_data;
struct device *dev = &GET_DEV(accel_dev);
if (!dc_data)
return;
dma_unmap_single(dev, dc_data->ovf_buff_p, dc_data->ovf_buff_sz,
DMA_FROM_DEVICE);
memset(dc_data->ovf_buff, 0, dc_data->ovf_buff_sz);
kfree(dc_data->ovf_buff);
devm_kfree(dev, dc_data);
accel_dev->dc_data = NULL;
}
static int qat_compression_init(struct adf_accel_dev *accel_dev)
{
int ret;
ret = qat_compression_alloc_dc_data(accel_dev);
if (ret)
return ret;
ret = qat_compression_create_instances(accel_dev);
if (ret)
qat_free_dc_data(accel_dev);
return ret;
}
static int qat_compression_shutdown(struct adf_accel_dev *accel_dev)
{
qat_free_dc_data(accel_dev);
return qat_compression_free_instances(accel_dev);
}
static int qat_compression_event_handler(struct adf_accel_dev *accel_dev,
enum adf_event event)
{
int ret;
switch (event) {
case ADF_EVENT_INIT:
ret = qat_compression_init(accel_dev);
break;
case ADF_EVENT_SHUTDOWN:
ret = qat_compression_shutdown(accel_dev);
break;
case ADF_EVENT_RESTARTING:
case ADF_EVENT_RESTARTED:
case ADF_EVENT_START:
case ADF_EVENT_STOP:
default:
ret = 0;
}
return ret;
}
int qat_compression_register(void)
{
memset(&qat_compression, 0, sizeof(qat_compression));
qat_compression.event_hld = qat_compression_event_handler;
qat_compression.name = "qat_compression";
return adf_service_register(&qat_compression);
}
int qat_compression_unregister(void)
{
return adf_service_unregister(&qat_compression);
}
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