event/octeontx2: support event timer

Add event timer adapter aka TIM initialization on SSO probe.

Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>

doc/guides/eventdevs/octeontx2.rst

@@ -28,6 +28,10 @@ Features of the OCTEON TX2 SSO PMD are:
 - Open system with configurable amount of outstanding events limited only by
   DRAM
 - HW accelerated dequeue timeout support to enable power management
+- HW managed event timers support through TIM, with high precision and
+  time granularity of 2.5us.
+- Up to 256 TIM rings aka event timer adapters.
+- Up to 8 rings traversed in parallel.
 
 Prerequisites and Compilation procedure
 ---------------------------------------
@@ -102,3 +106,5 @@ Debugging Options
    +===+============+=======================================================+
    | 1 | SSO        | --log-level='pmd\.event\.octeontx2,8'                 |
    +---+------------+-------------------------------------------------------+
+   | 2 | TIM        | --log-level='pmd\.event\.octeontx2\.timer,8'          |
+   +---+------------+-------------------------------------------------------+

drivers/event/octeontx2/Makefile

@@ -36,6 +36,7 @@ LIBABIVER := 1
 SRCS-$(CONFIG_RTE_LIBRTE_PMD_OCTEONTX2_EVENTDEV) += otx2_worker_dual.c
 SRCS-$(CONFIG_RTE_LIBRTE_PMD_OCTEONTX2_EVENTDEV) += otx2_worker.c
 SRCS-$(CONFIG_RTE_LIBRTE_PMD_OCTEONTX2_EVENTDEV) += otx2_evdev.c
+SRCS-$(CONFIG_RTE_LIBRTE_PMD_OCTEONTX2_EVENTDEV) += otx2_tim_evdev.c
 SRCS-$(CONFIG_RTE_LIBRTE_PMD_OCTEONTX2_EVENTDEV) += otx2_evdev_selftest.c
 SRCS-$(CONFIG_RTE_LIBRTE_PMD_OCTEONTX2_EVENTDEV) += otx2_evdev_irq.c
 

drivers/event/octeontx2/meson.build

@@ -7,6 +7,7 @@ sources = files('otx2_worker.c',
 		'otx2_evdev.c',
 		'otx2_evdev_irq.c',
 		'otx2_evdev_selftest.c',
+		'otx2_tim_evdev.c',
 		)
 
 allow_experimental_apis = true

drivers/event/octeontx2/otx2_evdev.c

@@ -15,6 +15,7 @@
 #include "otx2_evdev_stats.h"
 #include "otx2_evdev.h"
 #include "otx2_irq.h"
+#include "otx2_tim_evdev.h"
 
 static inline int
 sso_get_msix_offsets(const struct rte_eventdev *event_dev)
@@ -1310,6 +1311,7 @@ otx2_sso_init(struct rte_eventdev *event_dev)
 		event_dev->dev_ops->dev_selftest();
 	}
 
+	otx2_tim_init(pci_dev, (struct otx2_dev *)dev);
 
 	return 0;
 
@@ -1345,6 +1347,7 @@ dev_fini:
 		return -EAGAIN;
 	}
 
+	otx2_tim_fini();
 	otx2_dev_fini(pci_dev, dev);
 
 	return 0;

drivers/event/octeontx2/otx2_tim_evdev.c

@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(C) 2019 Marvell International Ltd.
+ */
+
+#include "otx2_evdev.h"
+#include "otx2_tim_evdev.h"
+
+void
+otx2_tim_init(struct rte_pci_device *pci_dev, struct otx2_dev *cmn_dev)
+{
+	struct rsrc_attach_req *atch_req;
+	struct free_rsrcs_rsp *rsrc_cnt;
+	const struct rte_memzone *mz;
+	struct otx2_tim_evdev *dev;
+	int rc;
+
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return;
+
+	mz = rte_memzone_reserve(RTE_STR(OTX2_TIM_EVDEV_NAME),
+				 sizeof(struct otx2_tim_evdev),
+				 rte_socket_id(), 0);
+	if (mz == NULL) {
+		otx2_tim_dbg("Unable to allocate memory for TIM Event device");
+		return;
+	}
+
+	dev = mz->addr;
+	dev->pci_dev = pci_dev;
+	dev->mbox = cmn_dev->mbox;
+	dev->bar2 = cmn_dev->bar2;
+
+	otx2_mbox_alloc_msg_free_rsrc_cnt(dev->mbox);
+	rc = otx2_mbox_process_msg(dev->mbox, (void *)&rsrc_cnt);
+	if (rc < 0) {
+		otx2_err("Unable to get free rsrc count.");
+		goto mz_free;
+	}
+
+	dev->nb_rings = rsrc_cnt->tim;
+
+	if (!dev->nb_rings) {
+		otx2_tim_dbg("No TIM Logical functions provisioned.");
+		goto mz_free;
+	}
+
+	atch_req = otx2_mbox_alloc_msg_attach_resources(dev->mbox);
+	atch_req->modify = true;
+	atch_req->timlfs = dev->nb_rings;
+
+	rc = otx2_mbox_process(dev->mbox);
+	if (rc < 0) {
+		otx2_err("Unable to attach TIM rings.");
+		goto mz_free;
+	}
+
+	return;
+
+mz_free:
+	rte_memzone_free(mz);
+}
+
+void
+otx2_tim_fini(void)
+{
+	struct otx2_tim_evdev *dev = tim_priv_get();
+	struct rsrc_detach_req *dtch_req;
+
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return;
+
+	dtch_req = otx2_mbox_alloc_msg_detach_resources(dev->mbox);
+	dtch_req->partial = true;
+	dtch_req->timlfs = true;
+
+	otx2_mbox_process(dev->mbox);
+	rte_memzone_free(rte_memzone_lookup(RTE_STR(OTX2_TIM_EVDEV_NAME)));
+}

drivers/event/octeontx2/otx2_tim_evdev.h

@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(C) 2019 Marvell International Ltd.
+ */
+
+#ifndef __OTX2_TIM_EVDEV_H__
+#define __OTX2_TIM_EVDEV_H__
+
+#include <rte_event_timer_adapter.h>
+
+#include "otx2_dev.h"
+
+#define OTX2_TIM_EVDEV_NAME otx2_tim_eventdev
+
+struct otx2_tim_evdev {
+	struct rte_pci_device *pci_dev;
+	struct otx2_mbox *mbox;
+	uint16_t nb_rings;
+	uintptr_t bar2;
+};
+
+static inline struct otx2_tim_evdev *
+tim_priv_get(void)
+{
+	const struct rte_memzone *mz;
+
+	mz = rte_memzone_lookup(RTE_STR(OTX2_TIM_EVDEV_NAME));
+	if (mz == NULL)
+		return NULL;
+
+	return mz->addr;
+}
+
+void otx2_tim_init(struct rte_pci_device *pci_dev, struct otx2_dev *cmn_dev);
+void otx2_tim_fini(void);
+
+#endif /* __OTX2_TIM_EVDEV_H__ */