X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=drivers%2Fnet%2Focteontx%2Fbase%2Focteontx_pkovf.c;fp=drivers%2Fnet%2Focteontx%2Fbase%2Focteontx_pkovf.c;h=f01d948e498d02a0a27b7d5b0d81349bb149116c;hb=055c52583a2794da8ba1e85a48cce3832372b12f;hp=0000000000000000000000000000000000000000;hpb=f239aed5e674965691846e8ce3f187dd47523689;p=deb_dpdk.git

diff --git a/drivers/net/octeontx/base/octeontx_pkovf.c b/drivers/net/octeontx/base/octeontx_pkovf.c
new file mode 100644
index 00000000..f01d948e
--- /dev/null
+++ b/drivers/net/octeontx/base/octeontx_pkovf.c
@@ -0,0 +1,617 @@
+/*
+ *   BSD LICENSE
+ *
+ *   Copyright (C) Cavium Inc. 2017. All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Cavium networks nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <stdbool.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <rte_eal.h>
+#include <rte_cycles.h>
+#include <rte_malloc.h>
+#include <rte_memory.h>
+#include <rte_bus_pci.h>
+#include <rte_spinlock.h>
+
+#include "../octeontx_logs.h"
+#include "octeontx_io.h"
+#include "octeontx_pkovf.h"
+
+struct octeontx_pko_iomem {
+	uint8_t		*va;
+	rte_iova_t	iova;
+	size_t		size;
+};
+
+#define PKO_IOMEM_NULL (struct octeontx_pko_iomem){0, 0, 0}
+
+struct octeontx_pko_fc_ctl_s {
+	int64_t buf_cnt;
+	int64_t padding[(PKO_DQ_FC_STRIDE / 8) - 1];
+};
+
+struct octeontx_pkovf {
+	uint8_t		*bar0;
+	uint8_t		*bar2;
+	uint16_t	domain;
+	uint16_t	vfid;
+};
+
+struct octeontx_pko_vf_ctl_s {
+	rte_spinlock_t lock;
+
+	struct octeontx_pko_iomem fc_iomem;
+	struct octeontx_pko_fc_ctl_s *fc_ctl;
+	struct octeontx_pkovf pko[PKO_VF_MAX];
+	struct {
+		uint64_t chanid;
+	} dq_map[PKO_VF_MAX * PKO_VF_NUM_DQ];
+};
+
+static struct octeontx_pko_vf_ctl_s pko_vf_ctl;
+
+static void *
+octeontx_pko_dq_vf_bar0(uint16_t txq)
+{
+	int vf_ix;
+
+	vf_ix = txq / PKO_VF_NUM_DQ;
+	return pko_vf_ctl.pko[vf_ix].bar0;
+}
+
+static int
+octeontx_pko_dq_gdq(uint16_t txq)
+{
+	return txq % PKO_VF_NUM_DQ;
+}
+
+/**
+ * Open a PKO DQ.
+ */
+static inline
+int octeontx_pko_dq_open(uint16_t txq)
+{
+	unsigned int reg_off;
+	uint8_t *vf_bar0;
+	uint64_t rtn;
+	int gdq;
+
+	vf_bar0 = octeontx_pko_dq_vf_bar0(txq);
+	gdq = octeontx_pko_dq_gdq(txq);
+
+	if (unlikely(gdq < 0 || vf_bar0 == NULL))
+		return -EINVAL;
+	*(volatile int64_t*)(pko_vf_ctl.fc_ctl + txq) =
+		PKO_DQ_FC_DEPTH_PAGES - PKO_DQ_FC_SKID;
+
+	rte_wmb();
+
+	octeontx_write64(PKO_DQ_FC_DEPTH_PAGES,
+			 vf_bar0 + PKO_VF_DQ_FC_STATUS(gdq));
+
+	/* Set the register to return descriptor (packet) count as DEPTH */
+	/* KIND=1, NCB_QUERY_RSP=0 */
+	octeontx_write64(1ull << PKO_DQ_KIND_BIT,
+				vf_bar0 + PKO_VF_DQ_WM_CTL(gdq));
+	reg_off = PKO_VF_DQ_OP_OPEN(gdq);
+
+	rtn = octeontx_reg_ldadd_u64(vf_bar0 + reg_off, 0);
+
+	/* PKO_DQOP_E::OPEN */
+	if (((rtn >> PKO_DQ_OP_BIT) & 0x3) != 0x1)
+		return -EIO;
+
+	switch (rtn >> PKO_DQ_STATUS_BIT) {
+	case 0xC:	/* DQALREADYCREATED */
+	case 0x0:	/* PASS */
+		break;
+	default:
+		return -EIO;
+	}
+
+	/* DRAIN=0, DRAIN_NULL_LINK=0, SW_XOFF=0 */
+	octeontx_write64(0, vf_bar0 + PKO_VF_DQ_SW_XOFF(gdq));
+
+	return rtn & ((1ull << PKO_DQ_OP_BIT) - 1);
+}
+
+/**
+ * Close a PKO DQ
+ * Flush all packets pending.
+ */
+static inline
+int octeontx_pko_dq_close(uint16_t txq)
+{
+	unsigned int reg_off;
+	uint8_t *vf_bar0;
+	uint64_t rtn;
+	int res;
+
+	vf_bar0 = octeontx_pko_dq_vf_bar0(txq);
+	res = octeontx_pko_dq_gdq(txq);
+
+	if (unlikely(res < 0 || vf_bar0 == NULL))
+		return -EINVAL;
+
+	reg_off = PKO_VF_DQ_OP_CLOSE(res);
+
+	rtn = octeontx_reg_ldadd_u64(vf_bar0 + reg_off, 0);
+
+	/* PKO_DQOP_E::CLOSE */
+	if (((rtn >> PKO_DQ_OP_BIT) & 0x3) != 0x2)
+		return -EIO;
+
+	switch (rtn >> PKO_DQ_STATUS_BIT) {
+	case 0xD:	/* DQNOTCREATED */
+	case 0x0:	/* PASS */
+		break;
+	default:
+		return -EIO;
+	}
+
+	res = rtn & ((1ull << PKO_DQ_OP_BIT) - 1); /* DEPTH */
+	return res;
+}
+
+/* Flush all packets pending on a DQ */
+static inline
+int octeontx_pko_dq_drain(uint16_t txq)
+{
+	unsigned int gdq;
+	uint8_t *vf_bar0;
+	uint64_t reg;
+	int res, timo = PKO_DQ_DRAIN_TO;
+
+	vf_bar0 = octeontx_pko_dq_vf_bar0(txq);
+	res = octeontx_pko_dq_gdq(txq);
+	gdq = res;
+
+	 /* DRAIN=1, DRAIN_NULL_LINK=0, SW_XOFF=1 */
+	 octeontx_write64(0x3, vf_bar0 + PKO_VF_DQ_SW_XOFF(gdq));
+	/* Wait until buffers leave DQs */
+	reg = octeontx_read64(vf_bar0 + PKO_VF_DQ_WM_CNT(gdq));
+	while (reg && timo > 0) {
+		rte_delay_us(100);
+		timo--;
+		reg = octeontx_read64(vf_bar0 + PKO_VF_DQ_WM_CNT(gdq));
+	}
+	/* DRAIN=0, DRAIN_NULL_LINK=0, SW_XOFF=0 */
+	octeontx_write64(0, vf_bar0 + PKO_VF_DQ_SW_XOFF(gdq));
+
+	return reg;
+}
+
+static inline int
+octeontx_pko_dq_range_lookup(struct octeontx_pko_vf_ctl_s *ctl, uint64_t chanid,
+			     unsigned int dq_num, unsigned int dq_from)
+{
+	unsigned int dq, dq_cnt;
+	unsigned int dq_base;
+
+	dq_cnt = 0;
+	dq = dq_from;
+	while (dq < RTE_DIM(ctl->dq_map)) {
+		dq_base = dq;
+		dq_cnt = 0;
+		while (ctl->dq_map[dq].chanid == ~chanid &&
+			dq < RTE_DIM(ctl->dq_map)) {
+			dq_cnt++;
+			if (dq_cnt == dq_num)
+				return dq_base;
+			dq++;
+		}
+		dq++;
+	}
+	return -1;
+}
+
+static inline void
+octeontx_pko_dq_range_assign(struct octeontx_pko_vf_ctl_s *ctl, uint64_t chanid,
+			     unsigned int dq_base, unsigned int dq_num)
+{
+	unsigned int dq, dq_cnt;
+
+	dq_cnt = 0;
+	while (dq_cnt < dq_num) {
+		dq = dq_base + dq_cnt;
+
+		octeontx_log_dbg("DQ# %u assigned to CHAN# %" PRIx64 "", dq,
+			chanid);
+
+		ctl->dq_map[dq].chanid = ~chanid;
+		dq_cnt++;
+	}
+}
+
+static inline int
+octeontx_pko_dq_claim(struct octeontx_pko_vf_ctl_s *ctl, unsigned int dq_base,
+		      unsigned int dq_num, uint64_t chanid)
+{
+	const uint64_t null_chanid = ~0ull;
+	int dq;
+
+	rte_spinlock_lock(&ctl->lock);
+
+	dq = octeontx_pko_dq_range_lookup(ctl, null_chanid, dq_num, dq_base);
+	if (dq < 0 || (unsigned int)dq != dq_base) {
+		rte_spinlock_unlock(&ctl->lock);
+		return -1;
+	}
+	octeontx_pko_dq_range_assign(ctl, chanid, dq_base, dq_num);
+
+	rte_spinlock_unlock(&ctl->lock);
+
+	return 0;
+}
+
+static inline int
+octeontx_pko_dq_free(struct octeontx_pko_vf_ctl_s *ctl, uint64_t chanid)
+{
+	const uint64_t null_chanid = ~0ull;
+	unsigned int dq = 0, dq_cnt = 0;
+
+	rte_spinlock_lock(&ctl->lock);
+	while (dq < RTE_DIM(ctl->dq_map)) {
+		if (ctl->dq_map[dq].chanid == ~chanid) {
+			ctl->dq_map[dq].chanid = ~null_chanid;
+			dq_cnt++;
+		}
+		dq++;
+	}
+	rte_spinlock_unlock(&ctl->lock);
+
+	return dq_cnt > 0 ? 0 : -EINVAL;
+}
+
+int
+octeontx_pko_channel_open(int dq_base, int dq_num, int chanid)
+{
+	struct octeontx_pko_vf_ctl_s *ctl = &pko_vf_ctl;
+	int res;
+
+	res = octeontx_pko_dq_claim(ctl, dq_base, dq_num, chanid);
+	if (res < 0)
+		return -1;
+
+	return 0;
+}
+
+int
+octeontx_pko_channel_close(int chanid)
+{
+	struct octeontx_pko_vf_ctl_s *ctl = &pko_vf_ctl;
+	int res;
+
+	res = octeontx_pko_dq_free(ctl, chanid);
+	if (res < 0)
+		return -1;
+
+	return 0;
+}
+
+static inline int
+octeontx_pko_chan_start(struct octeontx_pko_vf_ctl_s *ctl, uint64_t chanid)
+{
+	unsigned int dq_vf;
+	unsigned int dq, dq_cnt;
+
+	dq_cnt = 0;
+	dq = 0;
+	while (dq < RTE_DIM(ctl->dq_map)) {
+		dq_vf = dq / PKO_VF_NUM_DQ;
+
+		if (!ctl->pko[dq_vf].bar0) {
+			dq += PKO_VF_NUM_DQ;
+			continue;
+		}
+
+		if (ctl->dq_map[dq].chanid != ~chanid) {
+			dq++;
+			continue;
+		}
+
+		if (octeontx_pko_dq_open(dq) < 0)
+			break;
+
+		dq_cnt++;
+		dq++;
+	}
+
+	return dq_cnt;
+}
+
+int
+octeontx_pko_channel_start(int chanid)
+{
+	struct octeontx_pko_vf_ctl_s *ctl = &pko_vf_ctl;
+	int dq_cnt;
+
+	dq_cnt = octeontx_pko_chan_start(ctl, chanid);
+	if (dq_cnt < 0)
+		return -1;
+
+	return dq_cnt;
+}
+
+static inline int
+octeontx_pko_chan_stop(struct octeontx_pko_vf_ctl_s *ctl, uint64_t chanid)
+{
+	unsigned int dq, dq_cnt, dq_vf;
+	int res;
+
+	dq_cnt = 0;
+	dq = 0;
+	while (dq < RTE_DIM(ctl->dq_map)) {
+		dq_vf = dq / PKO_VF_NUM_DQ;
+
+		if (!ctl->pko[dq_vf].bar0) {
+			dq += PKO_VF_NUM_DQ;
+			continue;
+		}
+
+		if (ctl->dq_map[dq].chanid != ~chanid) {
+			dq++;
+			continue;
+		}
+
+		res = octeontx_pko_dq_drain(dq);
+		if (res > 0)
+			octeontx_log_err("draining DQ%d, buffers left: %x",
+					 dq, res);
+
+		res = octeontx_pko_dq_close(dq);
+		if (res < 0)
+			octeontx_log_err("closing DQ%d failed\n", dq);
+
+		dq_cnt++;
+		dq++;
+	}
+	return dq_cnt;
+}
+
+int
+octeontx_pko_channel_stop(int chanid)
+{
+	struct octeontx_pko_vf_ctl_s *ctl = &pko_vf_ctl;
+
+	octeontx_pko_chan_stop(ctl, chanid);
+	return 0;
+}
+
+static inline int
+octeontx_pko_channel_query(struct octeontx_pko_vf_ctl_s *ctl, uint64_t chanid,
+			   void *out, size_t out_elem_size,
+			   size_t dq_num, octeontx_pko_dq_getter_t getter)
+{
+	octeontx_dq_t curr;
+	unsigned int dq_vf;
+	unsigned int dq;
+
+	RTE_SET_USED(out_elem_size);
+	memset(&curr, 0, sizeof(octeontx_dq_t));
+
+	dq_vf = dq_num / PKO_VF_NUM_DQ;
+	dq = dq_num % PKO_VF_NUM_DQ;
+
+	if (!ctl->pko[dq_vf].bar0)
+		return -EINVAL;
+
+	if (ctl->dq_map[dq_num].chanid != ~chanid)
+		return -EINVAL;
+
+	uint8_t *iter = (uint8_t *)out;
+	curr.lmtline_va = ctl->pko[dq_vf].bar2;
+	curr.ioreg_va = (void *)((uintptr_t)ctl->pko[dq_vf].bar0
+		+ PKO_VF_DQ_OP_SEND((dq), 0));
+	curr.fc_status_va = ctl->fc_ctl + dq;
+
+	octeontx_log_dbg("lmtline=%p ioreg_va=%p fc_status_va=%p",
+			 curr.lmtline_va, curr.ioreg_va,
+			 curr.fc_status_va);
+
+	getter(&curr, (void *)iter);
+	return 0;
+}
+
+int
+octeontx_pko_channel_query_dqs(int chanid, void *out, size_t out_elem_size,
+				size_t dq_num, octeontx_pko_dq_getter_t getter)
+{
+	struct octeontx_pko_vf_ctl_s *ctl = &pko_vf_ctl;
+	int dq_cnt;
+
+	dq_cnt = octeontx_pko_channel_query(ctl, chanid, out, out_elem_size,
+						dq_num, getter);
+	if (dq_cnt < 0)
+		return -1;
+
+	return dq_cnt;
+}
+
+int
+octeontx_pko_vf_count(void)
+{
+	int vf_cnt;
+
+	vf_cnt = 0;
+	while (pko_vf_ctl.pko[vf_cnt].bar0)
+		vf_cnt++;
+
+	return vf_cnt;
+}
+
+int
+octeontx_pko_init_fc(const size_t pko_vf_count)
+{
+	int dq_ix;
+	uint64_t reg;
+	uint8_t *vf_bar0;
+	size_t vf_idx;
+	size_t fc_mem_size;
+
+	fc_mem_size = sizeof(struct octeontx_pko_fc_ctl_s) *
+			pko_vf_count * PKO_VF_NUM_DQ;
+
+	pko_vf_ctl.fc_iomem.va = rte_malloc(NULL, fc_mem_size, 128);
+	if (unlikely(!pko_vf_ctl.fc_iomem.va)) {
+		octeontx_log_err("fc_iomem: not enough memory");
+		return -ENOMEM;
+	}
+
+	pko_vf_ctl.fc_iomem.iova = rte_malloc_virt2iova((void *)
+							pko_vf_ctl.fc_iomem.va);
+	pko_vf_ctl.fc_iomem.size = fc_mem_size;
+
+	pko_vf_ctl.fc_ctl =
+		(struct octeontx_pko_fc_ctl_s *)pko_vf_ctl.fc_iomem.va;
+
+	/* Configure Flow-Control feature for all DQs of open VFs */
+	for (vf_idx = 0; vf_idx < pko_vf_count; vf_idx++) {
+		dq_ix = vf_idx * PKO_VF_NUM_DQ;
+
+		vf_bar0 = pko_vf_ctl.pko[vf_idx].bar0;
+
+		reg = (pko_vf_ctl.fc_iomem.iova +
+			(sizeof(struct octeontx_pko_fc_ctl_s) * dq_ix)) & ~0x7F;
+		reg |=			/* BASE */
+		    (0x2 << 3) |	/* HYST_BITS */
+		    (((PKO_DQ_FC_STRIDE == PKO_DQ_FC_STRIDE_16) ? 1 : 0) << 2) |
+		    (0x1 << 0);		/* ENABLE */
+
+		octeontx_write64(reg, vf_bar0 + PKO_VF_DQ_FC_CONFIG);
+
+		octeontx_log_dbg("PKO: bar0 %p VF_idx %d DQ_FC_CFG=%" PRIx64 "",
+				 vf_bar0, (int)vf_idx, reg);
+	}
+	return 0;
+}
+
+void
+octeontx_pko_fc_free(void)
+{
+	rte_free(pko_vf_ctl.fc_iomem.va);
+}
+
+static void
+octeontx_pkovf_setup(void)
+{
+	static bool init_once;
+
+	if (!init_once) {
+		unsigned int i;
+
+		rte_spinlock_init(&pko_vf_ctl.lock);
+
+		pko_vf_ctl.fc_iomem = PKO_IOMEM_NULL;
+		pko_vf_ctl.fc_ctl = NULL;
+
+		for (i = 0; i < PKO_VF_MAX; i++) {
+			pko_vf_ctl.pko[i].bar0 = NULL;
+			pko_vf_ctl.pko[i].bar2 = NULL;
+			pko_vf_ctl.pko[i].domain = ~(uint16_t)0;
+			pko_vf_ctl.pko[i].vfid = ~(uint16_t)0;
+		}
+
+		for (i = 0; i < (PKO_VF_MAX * PKO_VF_NUM_DQ); i++)
+			pko_vf_ctl.dq_map[i].chanid = 0;
+
+		init_once = true;
+	}
+}
+
+/* PKOVF pcie device*/
+static int
+pkovf_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
+{
+	uint64_t val;
+	uint16_t vfid;
+	uint16_t domain;
+	uint8_t *bar0;
+	uint8_t *bar2;
+	struct octeontx_pkovf *res;
+
+	RTE_SET_USED(pci_drv);
+
+	/* For secondary processes, the primary has done all the work */
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return 0;
+
+	if (pci_dev->mem_resource[0].addr == NULL ||
+	    pci_dev->mem_resource[2].addr == NULL) {
+		octeontx_log_err("Empty bars %p %p",
+			pci_dev->mem_resource[0].addr,
+			pci_dev->mem_resource[2].addr);
+		return -ENODEV;
+	}
+	bar0 = pci_dev->mem_resource[0].addr;
+	bar2 = pci_dev->mem_resource[2].addr;
+
+	octeontx_pkovf_setup();
+
+	/* get vfid and domain */
+	val = octeontx_read64(bar0 + PKO_VF_DQ_FC_CONFIG);
+	domain = (val >> 7) & 0xffff;
+	vfid = (val >> 23) & 0xffff;
+
+	if (unlikely(vfid >= PKO_VF_MAX)) {
+		octeontx_log_err("pko: Invalid vfid %d", vfid);
+		return -EINVAL;
+	}
+
+	res = &pko_vf_ctl.pko[vfid];
+	res->vfid = vfid;
+	res->domain = domain;
+	res->bar0 = bar0;
+	res->bar2 = bar2;
+
+	octeontx_log_dbg("Domain=%d group=%d", res->domain, res->vfid);
+	return 0;
+}
+
+#define PCI_VENDOR_ID_CAVIUM               0x177D
+#define PCI_DEVICE_ID_OCTEONTX_PKO_VF      0xA049
+
+static const struct rte_pci_id pci_pkovf_map[] = {
+	{
+		RTE_PCI_DEVICE(PCI_VENDOR_ID_CAVIUM,
+				PCI_DEVICE_ID_OCTEONTX_PKO_VF)
+	},
+	{
+		.vendor_id = 0,
+	},
+};
+
+static struct rte_pci_driver pci_pkovf = {
+	.id_table = pci_pkovf_map,
+	.drv_flags = RTE_PCI_DRV_NEED_MAPPING,
+	.probe = pkovf_probe,
+};
+
+RTE_PMD_REGISTER_PCI(octeontx_pkovf, pci_pkovf);