@@ -4,7 +4,7 @@ obj-$(CONFIG_INTEL_IDXD_BUS) += idxd_bus.o
idxd_bus-y := bus.o
obj-$(CONFIG_INTEL_IDXD) += idxd.o
-idxd-y := init.o irq.o device.o sysfs.o submit.o dma.o cdev.o debugfs.o
+idxd-y := init.o irq.o device.o sysfs.o submit.o dma.o cdev.o debugfs.o defaults.o
idxd-$(CONFIG_INTEL_IDXD_PERFMON) += perfmon.o
new file mode 100644
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Intel Corporation. All rights rsvd. */
+#include <linux/kernel.h>
+#include "idxd.h"
+
+int idxd_load_iaa_device_defaults(struct idxd_device *idxd)
+{
+ struct idxd_engine *engine;
+ struct idxd_group *group;
+ struct idxd_wq *wq;
+
+ if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
+ return 0;
+
+ wq = idxd->wqs[0];
+
+ if (wq->state != IDXD_WQ_DISABLED)
+ return -EPERM;
+
+ /* set mode to "dedicated" */
+ set_bit(WQ_FLAG_DEDICATED, &wq->flags);
+ wq->threshold = 0;
+
+ /* only setting up 1 wq, so give it all the wq space */
+ wq->size = idxd->max_wq_size;
+
+ /* set priority to 10 */
+ wq->priority = 10;
+
+ /* set type to "kernel" */
+ wq->type = IDXD_WQT_KERNEL;
+
+ /* set wq group to 0 */
+ group = idxd->groups[0];
+ wq->group = group;
+ group->num_wqs++;
+
+ /* set name to "iaa_crypto" */
+ memset(wq->name, 0, WQ_NAME_SIZE + 1);
+ strscpy(wq->name, "iaa_crypto", WQ_NAME_SIZE + 1);
+
+ /* set driver_name to "crypto" */
+ memset(wq->driver_name, 0, DRIVER_NAME_SIZE + 1);
+ strscpy(wq->driver_name, "crypto", DRIVER_NAME_SIZE + 1);
+
+ engine = idxd->engines[0];
+
+ /* set engine group to 0 */
+ engine->group = idxd->groups[0];
+ engine->group->num_engines++;
+
+ return 0;
+}
@@ -277,6 +277,8 @@ struct idxd_dma_dev {
struct dma_device dma;
};
+typedef int (*load_device_defaults_fn_t) (struct idxd_device *idxd);
+
struct idxd_driver_data {
const char *name_prefix;
enum idxd_type type;
@@ -286,6 +288,7 @@ struct idxd_driver_data {
int evl_cr_off;
int cr_status_off;
int cr_result_off;
+ load_device_defaults_fn_t load_device_defaults;
};
struct idxd_evl {
@@ -730,6 +733,7 @@ void idxd_unregister_devices(struct idxd_device *idxd);
void idxd_wqs_quiesce(struct idxd_device *idxd);
bool idxd_queue_int_handle_resubmit(struct idxd_desc *desc);
void multi_u64_to_bmap(unsigned long *bmap, u64 *val, int count);
+int idxd_load_iaa_device_defaults(struct idxd_device *idxd);
/* device interrupt control */
irqreturn_t idxd_misc_thread(int vec, void *data);
@@ -59,6 +59,7 @@ static struct idxd_driver_data idxd_driver_data[] = {
.evl_cr_off = offsetof(struct iax_evl_entry, cr),
.cr_status_off = offsetof(struct iax_completion_record, status),
.cr_result_off = offsetof(struct iax_completion_record, error_code),
+ .load_device_defaults = idxd_load_iaa_device_defaults,
},
};
@@ -745,6 +746,12 @@ static int idxd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto err;
}
+ if (data->load_device_defaults) {
+ rc = data->load_device_defaults(idxd);
+ if (rc)
+ dev_warn(dev, "IDXD loading device defaults failed\n");
+ }
+
rc = idxd_register_devices(idxd);
if (rc) {
dev_err(dev, "IDXD sysfs setup failed\n");
Add a load_device_defaults() function pointer to struct idxd_driver_data, which if defined, will be called when an idxd device is probed and will allow the idxd device to be configured with default values. The load_device_defaults() function is passed an idxd device to work with to set specific device attributes. Also add a load_device_defaults() implementation IAA devices; future patches would add default functions for other device types such as DSA. The way idxd device probing works, if the device configuration is valid at that point e.g. at least one workqueue and engine is properly configured then the device will be enabled and ready to go. The IAA implementation, idxd_load_iaa_device_defaults(), configures a single workqueue (wq0) for each device with the following default values: mode "dedicated" threshold 0 size Total WQ Size from WQCAP priority 10 type IDXD_WQT_KERNEL group 0 name "iaa_crypto" driver_name "crypto" Note that this now adds another configuration step for any users that want to configure their own devices/workqueus with something different in that they'll first need to disable (in the case of IAA) wq0 and the device itself before they can set their own attributes and re-enable, since they've been already been auto-enabled. Note also that in order for the new configuration to be applied to the deflate-iaa crypto algorithm the iaa_crypto module needs to unregister the old version, which is accomplished by removing the iaa_crypto module, and re-registering it with the new configuration by reinserting the iaa_crypto module. Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> --- drivers/dma/idxd/Makefile | 2 +- drivers/dma/idxd/defaults.c | 53 +++++++++++++++++++++++++++++++++++++ drivers/dma/idxd/idxd.h | 4 +++ drivers/dma/idxd/init.c | 7 +++++ 4 files changed, 65 insertions(+), 1 deletion(-) create mode 100644 drivers/dma/idxd/defaults.c