[dpdk-dev] [PATCH v2 09/27] common/octeontx2: handle intra device operations

[<jerinj@marvell.com>]

From: Jerin Jacob <jerinj@marvell.com>

The mempool device(NPA) may be provisioned as a standalone device or
it can be part of ethdev/eventdev device. In order to address
mempool as standalone or integrated with ethdev/eventdev device,
An intra device structure being introduced.

When the _first_ ethdev/eventdev PCIe device or standalone mempool(NPA)
devices get probed by the eal PCI subsystem,
The NPA object(struct otx2_npa_lf) stored in otx2_dev base class.
Once it is accomplished, the other consumer drivers like
ethdev driver or eventdev driver use otx2_npa_* API to operate on
shared NPA object.

The similar concept followed for SSO object, Which needs to share between
PCIe devices.

Signed-off-by: Jerin Jacob <jerinj@marvell.com>
Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
---
 drivers/common/octeontx2/otx2_common.c        | 163 ++++++++++++++++++
 drivers/common/octeontx2/otx2_common.h        |  32 +++-
 drivers/common/octeontx2/otx2_dev.c           |   6 +
 drivers/common/octeontx2/otx2_dev.h           |   1 +
 .../rte_common_octeontx2_version.map          |   9 +
 5 files changed, 210 insertions(+), 1 deletion(-)

diff --git a/drivers/common/octeontx2/otx2_common.c b/drivers/common/octeontx2/otx2_common.c
index a4b91b4f1..7e4536639 100644
--- a/drivers/common/octeontx2/otx2_common.c
+++ b/drivers/common/octeontx2/otx2_common.c
@@ -2,9 +2,172 @@
  * Copyright(C) 2019 Marvell International Ltd.
  */
 
+#include <rte_atomic.h>
+#include <rte_malloc.h>
 #include <rte_log.h>
 
 #include "otx2_common.h"
+#include "otx2_dev.h"
+#include "otx2_mbox.h"
+
+/**
+ * @internal
+ * Set default NPA configuration.
+ */
+void
+otx2_npa_set_defaults(struct otx2_idev_cfg *idev)
+{
+	idev->npa_pf_func = 0;
+	rte_atomic16_set(&idev->npa_refcnt, 0);
+}
+
+/**
+ * @internal
+ * Get intra device config structure.
+ */
+struct otx2_idev_cfg *
+otx2_intra_dev_get_cfg(void)
+{
+	const char name[] = "octeontx2_intra_device_conf";
+	const struct rte_memzone *mz;
+	struct otx2_idev_cfg *idev;
+
+	mz = rte_memzone_lookup(name);
+	if (mz != NULL)
+		return mz->addr;
+
+	/* Request for the first time */
+	mz = rte_memzone_reserve_aligned(name, sizeof(struct otx2_idev_cfg),
+					 SOCKET_ID_ANY, 0, OTX2_ALIGN);
+	if (mz != NULL) {
+		idev = mz->addr;
+		idev->sso_pf_func = 0;
+		idev->npa_lf = NULL;
+		otx2_npa_set_defaults(idev);
+		return idev;
+	}
+	return NULL;
+}
+
+/**
+ * @internal
+ * Get SSO PF_FUNC.
+ */
+uint16_t
+otx2_sso_pf_func_get(void)
+{
+	struct otx2_idev_cfg *idev;
+	uint16_t sso_pf_func;
+
+	sso_pf_func = 0;
+	idev = otx2_intra_dev_get_cfg();
+
+	if (idev != NULL)
+		sso_pf_func = idev->sso_pf_func;
+
+	return sso_pf_func;
+}
+
+/**
+ * @internal
+ * Set SSO PF_FUNC.
+ */
+void
+otx2_sso_pf_func_set(uint16_t sso_pf_func)
+{
+	struct otx2_idev_cfg *idev;
+
+	idev = otx2_intra_dev_get_cfg();
+
+	if (idev != NULL) {
+		idev->sso_pf_func = sso_pf_func;
+		rte_smp_wmb();
+	}
+}
+
+/**
+ * @internal
+ * Get NPA PF_FUNC.
+ */
+uint16_t
+otx2_npa_pf_func_get(void)
+{
+	struct otx2_idev_cfg *idev;
+	uint16_t npa_pf_func;
+
+	npa_pf_func = 0;
+	idev = otx2_intra_dev_get_cfg();
+
+	if (idev != NULL)
+		npa_pf_func = idev->npa_pf_func;
+
+	return npa_pf_func;
+}
+
+/**
+ * @internal
+ * Get NPA lf object.
+ */
+struct otx2_npa_lf *
+otx2_npa_lf_obj_get(void)
+{
+	struct otx2_idev_cfg *idev;
+
+	idev = otx2_intra_dev_get_cfg();
+
+	if (idev != NULL && rte_atomic16_read(&idev->npa_refcnt))
+		return idev->npa_lf;
+
+	return NULL;
+}
+
+/**
+ * @internal
+ * Is NPA lf active for the given device?.
+ */
+int
+otx2_npa_lf_active(void *otx2_dev)
+{
+	struct otx2_dev *dev = otx2_dev;
+	struct otx2_idev_cfg *idev;
+
+	/* Check if npalf is actively used on this dev */
+	idev = otx2_intra_dev_get_cfg();
+	if (!idev || !idev->npa_lf || idev->npa_lf->mbox != dev->mbox)
+		return 0;
+
+	return rte_atomic16_read(&idev->npa_refcnt);
+}
+
+/*
+ * @internal
+ * Gets reference only to existing NPA LF object.
+ */
+int otx2_npa_lf_obj_ref(void)
+{
+	struct otx2_idev_cfg *idev;
+	uint16_t cnt;
+	int rc;
+
+	idev = otx2_intra_dev_get_cfg();
+
+	/* Check if ref not possible */
+	if (idev == NULL)
+		return -EINVAL;
+
+
+	/* Get ref only if > 0 */
+	cnt = rte_atomic16_read(&idev->npa_refcnt);
+	while (cnt != 0) {
+		rc = rte_atomic16_cmpset(&idev->npa_refcnt_u16, cnt, cnt + 1);
+		if (rc)
+			break;
+
+		cnt = rte_atomic16_read(&idev->npa_refcnt);
+	}
+
+	return cnt ? 0 : -EINVAL;
+}
 
 /**
  * @internal
diff --git a/drivers/common/octeontx2/otx2_common.h b/drivers/common/octeontx2/otx2_common.h
index b9e7a7f8d..cbc5c65a7 100644
--- a/drivers/common/octeontx2/otx2_common.h
+++ b/drivers/common/octeontx2/otx2_common.h
@@ -5,9 +5,12 @@
 #ifndef _OTX2_COMMON_H_
 #define _OTX2_COMMON_H_
 
+#include <rte_atomic.h>
 #include <rte_common.h>
-#include <rte_io.h>
+#include <rte_cycles.h>
 #include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_io.h>
 
 #include "hw/otx2_rvu.h"
 #include "hw/otx2_nix.h"
@@ -33,6 +36,33 @@
 #define __hot   __attribute__((hot))
 #endif
 
+/* Intra device related functions */
+struct otx2_npa_lf {
+	struct otx2_mbox *mbox;
+	struct rte_pci_device *pci_dev;
+	struct rte_intr_handle *intr_handle;
+};
+
+struct otx2_idev_cfg {
+	uint16_t sso_pf_func;
+	uint16_t npa_pf_func;
+	struct otx2_npa_lf *npa_lf;
+	RTE_STD_C11
+	union {
+		rte_atomic16_t npa_refcnt;
+		uint16_t npa_refcnt_u16;
+	};
+};
+
+struct otx2_idev_cfg *otx2_intra_dev_get_cfg(void);
+void otx2_sso_pf_func_set(uint16_t sso_pf_func);
+uint16_t otx2_sso_pf_func_get(void);
+uint16_t otx2_npa_pf_func_get(void);
+struct otx2_npa_lf *otx2_npa_lf_obj_get(void);
+void otx2_npa_set_defaults(struct otx2_idev_cfg *idev);
+int otx2_npa_lf_active(void *dev);
+int otx2_npa_lf_obj_ref(void);
+
 /* Log */
 extern int otx2_logtype_base;
 extern int otx2_logtype_mbox;
diff --git a/drivers/common/octeontx2/otx2_dev.c b/drivers/common/octeontx2/otx2_dev.c
index ccdb2df78..59bd988d1 100644
--- a/drivers/common/octeontx2/otx2_dev.c
+++ b/drivers/common/octeontx2/otx2_dev.c
@@ -177,8 +177,14 @@ void
 otx2_dev_fini(struct rte_pci_device *pci_dev, void *otx2_dev)
 {
 	struct otx2_dev *dev = otx2_dev;
+	struct otx2_idev_cfg *idev;
 	struct otx2_mbox *mbox;
 
+	/* Clear references to this pci dev */
+	idev = otx2_intra_dev_get_cfg();
+	if (idev->npa_lf && idev->npa_lf->pci_dev == pci_dev)
+		idev->npa_lf = NULL;
+
 	/* Release PF - VF */
 	mbox = &dev->mbox_vfpf;
 	if (mbox->hwbase && mbox->dev)
diff --git a/drivers/common/octeontx2/otx2_dev.h b/drivers/common/octeontx2/otx2_dev.h
index a89570b62..70104dfa2 100644
--- a/drivers/common/octeontx2/otx2_dev.h
+++ b/drivers/common/octeontx2/otx2_dev.h
@@ -40,6 +40,7 @@ struct otx2_dev;
 	otx2_intr_t intr;				\
 	int timer_set;	/* ~0 : no alarm handling */	\
 	uint64_t hwcap;					\
+	struct otx2_npa_lf npalf;			\
 	struct otx2_mbox *mbox;				\
 	uint16_t maxvf;					\
 	const struct otx2_dev_ops *ops
diff --git a/drivers/common/octeontx2/rte_common_octeontx2_version.map b/drivers/common/octeontx2/rte_common_octeontx2_version.map
index 2f8a607ee..602eb3651 100644
--- a/drivers/common/octeontx2/rte_common_octeontx2_version.map
+++ b/drivers/common/octeontx2/rte_common_octeontx2_version.map
@@ -21,6 +21,15 @@ DPDK_19.05 {
 	otx2_mbox_msg_send;
 	otx2_mbox_wait_for_rsp;
 
+	otx2_intra_dev_get_cfg;
+	otx2_npa_lf_active;
+	otx2_npa_lf_obj_get;
+	otx2_npa_lf_obj_ref;
+	otx2_npa_pf_func_get;
+	otx2_npa_set_defaults;
+	otx2_sso_pf_func_get;
+	otx2_sso_pf_func_set;
+
 	otx2_disable_irqs;
 	otx2_unregister_irq;
 	otx2_register_irq;
-- 
2.21.0