[Accel-config] [PATCH v1 5/6] accel-config: Add new API to support 256 bits op_cap

From: Ramesh Thomas <ramesh.thomas(a)intel.com>

Adds new API to get 256 bits op_cap field. It will return a structure
containing for 64 bit values as returned by the sysfs interface

Signed-off-by: Ramesh Thomas <ramesh.thomas(a)intel.com>
---
 accfg/lib/libaccel-config.sym |  5 +++++
 accfg/lib/libaccfg.c          | 29 +++++++++++++++++++++++++++++
 accfg/libaccel_config.h       |  6 ++++++
 3 files changed, 40 insertions(+)

diff --git a/accfg/lib/libaccel-config.sym b/accfg/lib/libaccel-config.sym
index bffb8d8..aecc98b 100644
--- a/accfg/lib/libaccel-config.sym
+++ b/accfg/lib/libaccel-config.sym
@@ -144,3 +144,8 @@ LIBACCFG_8 {
 global:
 	accfg_wq_get_user_dev_path;
 } LIBACCFG_7;
+
+LIBACCFG_9 {
+global:
+	accfg_device_get_op_cap;
+} LIBACCFG_8;
diff --git a/accfg/lib/libaccfg.c b/accfg/lib/libaccfg.c
index 1d39bd6..12a97f5 100644
--- a/accfg/lib/libaccfg.c
+++ b/accfg/lib/libaccfg.c
@@ -1250,6 +1250,35 @@ ACCFG_EXPORT uint64_t accfg_device_get_max_transfer_size(
 	return device->max_transfer_size;
 }
 
+ACCFG_EXPORT int accfg_device_get_op_cap(struct accfg_device *device,
+		struct accfg_op_cap *op_cap)
+{
+	char *oc;
+	int dfd;
+	int rc;
+	struct accfg_ctx *ctx;
+
+	if (!device)
+		return -EINVAL;
+
+	ctx = accfg_device_get_ctx(device);
+	dfd = open(device->device_path, O_PATH);
+	if (dfd < 0)
+		return -errno;
+	oc = accfg_get_param_str(ctx, dfd, "op_cap");
+	close(dfd);
+	rc = sscanf(oc, "%" SCNx64 " %" SCNx64 " %" SCNx64 " %" SCNx64,
+			&op_cap->bits[0], &op_cap->bits[1],
+			&op_cap->bits[2], &op_cap->bits[3]);
+
+	free(oc);
+
+	if (rc != 4)
+		return errno ? -errno : -EIO;
+
+	return 0;
+}
+
 ACCFG_EXPORT uint64_t accfg_device_get_gen_cap(struct accfg_device *device)
 {
 	return device->gencap;
diff --git a/accfg/libaccel_config.h b/accfg/libaccel_config.h
index 3354028..5b37790 100644
--- a/accfg/libaccel_config.h
+++ b/accfg/libaccel_config.h
@@ -79,6 +79,10 @@ struct accfg_error {
 	uint64_t val[4];
 };
 
+struct accfg_op_cap {
+	uint64_t bits[4];
+};
+
 /* parameters read from sysfs of accfg driver */
 struct dev_parameters {
 	unsigned int token_limit;
@@ -168,6 +172,8 @@ int accfg_device_get_numa_node(struct accfg_device *device);
 unsigned int accfg_device_get_ims_size(struct accfg_device *device);
 unsigned int accfg_device_get_max_batch_size(struct accfg_device *device);
 uint64_t accfg_device_get_max_transfer_size(struct accfg_device *device);
+int accfg_device_get_op_cap(struct accfg_device *device,
+		struct accfg_op_cap *op_cap);
 uint64_t accfg_device_get_gen_cap(struct accfg_device *device);
 unsigned int accfg_device_get_configurable(struct accfg_device *device);
 bool accfg_device_get_pasid_enabled(struct accfg_device  *device);
-- 
2.26.3