/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(C) 2021 Marvell.
 */

#include <cnxk_ethdev.h>

#define CNXK_NIX_INL_META_POOL_NAME "NIX_INL_META_POOL"

#define CNXK_NIX_INL_SELFTEST	      "selftest"
#define CNXK_NIX_INL_IPSEC_IN_MIN_SPI "ipsec_in_min_spi"
#define CNXK_NIX_INL_IPSEC_IN_MAX_SPI "ipsec_in_max_spi"
#define CNXK_INL_CPT_CHANNEL	      "inl_cpt_channel"
#define CNXK_NIX_INL_NB_META_BUFS     "nb_meta_bufs"
#define CNXK_NIX_INL_META_BUF_SZ      "meta_buf_sz"
#define CNXK_NIX_SOFT_EXP_POLL_FREQ   "soft_exp_poll_freq"

/* Default soft expiry poll freq in usec */
#define CNXK_NIX_SOFT_EXP_POLL_FREQ_DFLT 100

struct inl_cpt_channel {
	bool is_multi_channel;
	uint16_t channel;
	uint16_t mask;
};

#define CNXK_NIX_INL_DEV_NAME RTE_STR(cnxk_nix_inl_dev_)
#define CNXK_NIX_INL_DEV_NAME_LEN                                              \
	(sizeof(CNXK_NIX_INL_DEV_NAME) + PCI_PRI_STR_SIZE)

static inline int
bitmap_ctzll(uint64_t slab)
{
	if (slab == 0)
		return 0;

	return __builtin_ctzll(slab);
}

int
cnxk_nix_inl_meta_pool_cb(uint64_t *aura_handle, uint32_t buf_sz, uint32_t nb_bufs, bool destroy)
{
	const char *mp_name = CNXK_NIX_INL_META_POOL_NAME;
	struct rte_pktmbuf_pool_private mbp_priv;
	struct npa_aura_s *aura;
	struct rte_mempool *mp;
	uint16_t first_skip;
	int rc;

	/* Destroy the mempool if requested */
	if (destroy) {
		mp = rte_mempool_lookup(mp_name);
		if (!mp)
			return -ENOENT;

		if (mp->pool_id != *aura_handle) {
			plt_err("Meta pool aura mismatch");
			return -EINVAL;
		}

		plt_free(mp->pool_config);
		rte_mempool_free(mp);

		*aura_handle = 0;
		return 0;
	}

	/* Need to make it similar to rte_pktmbuf_pool() for sake of OOP
	 * support.
	 */
	mp = rte_mempool_create_empty(mp_name, nb_bufs, buf_sz, 0,
				      sizeof(struct rte_pktmbuf_pool_private),
				      SOCKET_ID_ANY, 0);
	if (!mp) {
		plt_err("Failed to create inline meta pool");
		return -EIO;
	}

	/* Indicate to allocate zero aura */
	aura = plt_zmalloc(sizeof(struct npa_aura_s), 0);
	if (!aura) {
		rc = -ENOMEM;
		goto free_mp;
	}
	aura->ena = 1;
	aura->pool_addr = 0x0;

	rc = rte_mempool_set_ops_byname(mp, rte_mbuf_platform_mempool_ops(),
					aura);
	if (rc) {
		plt_err("Failed to setup mempool ops for meta, rc=%d", rc);
		goto free_aura;
	}

	/* Init mempool private area */
	first_skip = sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM;
	memset(&mbp_priv, 0, sizeof(mbp_priv));
	mbp_priv.mbuf_data_room_size = (buf_sz - first_skip +
					RTE_PKTMBUF_HEADROOM);
	rte_pktmbuf_pool_init(mp, &mbp_priv);

	/* Populate buffer */
	rc = rte_mempool_populate_default(mp);
	if (rc < 0) {
		plt_err("Failed to create inline meta pool, rc=%d", rc);
		goto free_aura;
	}

	rte_mempool_obj_iter(mp, rte_pktmbuf_init, NULL);
	*aura_handle = mp->pool_id;
	return 0;
free_aura:
	plt_free(aura);
free_mp:
	rte_mempool_free(mp);
	return rc;
}

int
cnxk_eth_outb_sa_idx_get(struct cnxk_eth_dev *dev, uint32_t *idx_p,
			 uint32_t spi)
{
	uint32_t pos, idx;
	uint64_t slab;
	int rc;

	if (!dev->outb.sa_bmap)
		return -ENOTSUP;

	pos = 0;
	slab = 0;
	/* Scan from the beginning */
	plt_bitmap_scan_init(dev->outb.sa_bmap);

	if (dev->nix.custom_sa_action) {
		if (spi > dev->outb.max_sa)
			return -ENOTSUP;
		idx = spi;
	} else {
		/* Scan bitmap to get the free sa index */
		rc = plt_bitmap_scan(dev->outb.sa_bmap, &pos, &slab);
		/* Empty bitmap */
		if (rc == 0) {
			plt_err("Outbound SA' exhausted, use 'ipsec_out_max_sa' "
				"devargs to increase");
			return -ERANGE;
		}

		/* Get free SA index */
		idx = pos + bitmap_ctzll(slab);
	}
	plt_bitmap_clear(dev->outb.sa_bmap, idx);
	*idx_p = idx;
	return 0;
}

int
cnxk_eth_outb_sa_idx_put(struct cnxk_eth_dev *dev, uint32_t idx)
{
	if (idx >= dev->outb.max_sa)
		return -EINVAL;

	/* Check if it is already free */
	if (plt_bitmap_get(dev->outb.sa_bmap, idx))
		return -EINVAL;

	/* Mark index as free */
	plt_bitmap_set(dev->outb.sa_bmap, idx);
	return 0;
}

struct cnxk_eth_sec_sess *
cnxk_eth_sec_sess_get_by_spi(struct cnxk_eth_dev *dev, uint32_t spi, bool inb)
{
	struct cnxk_eth_sec_sess_list *list;
	struct cnxk_eth_sec_sess *eth_sec;

	list = inb ? &dev->inb.list : &dev->outb.list;
	TAILQ_FOREACH(eth_sec, list, entry) {
		if (eth_sec->spi == spi)
			return eth_sec;
	}

	return NULL;
}

struct cnxk_eth_sec_sess *
cnxk_eth_sec_sess_get_by_sess(struct cnxk_eth_dev *dev,
			      struct rte_security_session *sess)
{
	struct cnxk_eth_sec_sess *eth_sec = NULL;

	/* Search in inbound list */
	TAILQ_FOREACH(eth_sec, &dev->inb.list, entry) {
		if (eth_sec->sess == sess)
			return eth_sec;
	}

	/* Search in outbound list */
	TAILQ_FOREACH(eth_sec, &dev->outb.list, entry) {
		if (eth_sec->sess == sess)
			return eth_sec;
	}

	return NULL;
}

static unsigned int
cnxk_eth_sec_session_get_size(void *device __rte_unused)
{
	return sizeof(struct cnxk_eth_sec_sess);
}

struct rte_security_ops cnxk_eth_sec_ops = {
	.session_get_size = cnxk_eth_sec_session_get_size
};

static int
parse_val_u32(const char *key, const char *value, void *extra_args)
{
	RTE_SET_USED(key);
	uint32_t val;

	errno = 0;
	val = strtoul(value, NULL, 0);
	if (errno)
		val = 0;

	*(uint32_t *)extra_args = val;

	return 0;
}

static int
parse_selftest(const char *key, const char *value, void *extra_args)
{
	RTE_SET_USED(key);
	uint32_t val;

	val = atoi(value);

	*(uint8_t *)extra_args = !!(val == 1);
	return 0;
}

static int
parse_inl_cpt_channel(const char *key, const char *value, void *extra_args)
{
	RTE_SET_USED(key);
	uint16_t chan = 0, mask = 0;
	char *next = 0;

	/* next will point to the separator '/' */
	chan = strtol(value, &next, 16);
	mask = strtol(++next, 0, 16);

	if (chan > GENMASK(12, 0) || mask > GENMASK(12, 0))
		return -EINVAL;

	((struct inl_cpt_channel *)extra_args)->channel = chan;
	((struct inl_cpt_channel *)extra_args)->mask = mask;
	((struct inl_cpt_channel *)extra_args)->is_multi_channel = true;

	return 0;
}

static int
nix_inl_parse_devargs(struct rte_devargs *devargs,
		      struct roc_nix_inl_dev *inl_dev)
{
	uint32_t soft_exp_poll_freq = CNXK_NIX_SOFT_EXP_POLL_FREQ_DFLT;
	uint32_t ipsec_in_max_spi = BIT(8) - 1;
	uint32_t ipsec_in_min_spi = 0;
	struct inl_cpt_channel cpt_channel;
	struct rte_kvargs *kvlist;
	uint32_t nb_meta_bufs = 0;
	uint32_t meta_buf_sz = 0;
	uint8_t selftest = 0;

	memset(&cpt_channel, 0, sizeof(cpt_channel));

	if (devargs == NULL)
		goto null_devargs;

	kvlist = rte_kvargs_parse(devargs->args, NULL);
	if (kvlist == NULL)
		goto exit;

	rte_kvargs_process(kvlist, CNXK_NIX_INL_SELFTEST, &parse_selftest,
			   &selftest);
	rte_kvargs_process(kvlist, CNXK_NIX_INL_IPSEC_IN_MIN_SPI,
			   &parse_val_u32, &ipsec_in_min_spi);
	rte_kvargs_process(kvlist, CNXK_NIX_INL_IPSEC_IN_MAX_SPI,
			   &parse_val_u32, &ipsec_in_max_spi);
	rte_kvargs_process(kvlist, CNXK_INL_CPT_CHANNEL, &parse_inl_cpt_channel,
			   &cpt_channel);
	rte_kvargs_process(kvlist, CNXK_NIX_INL_NB_META_BUFS, &parse_val_u32,
			   &nb_meta_bufs);
	rte_kvargs_process(kvlist, CNXK_NIX_INL_META_BUF_SZ, &parse_val_u32,
			   &meta_buf_sz);
	rte_kvargs_process(kvlist, CNXK_NIX_SOFT_EXP_POLL_FREQ,
			   &parse_val_u32, &soft_exp_poll_freq);
	rte_kvargs_free(kvlist);

null_devargs:
	inl_dev->ipsec_in_min_spi = ipsec_in_min_spi;
	inl_dev->ipsec_in_max_spi = ipsec_in_max_spi;
	inl_dev->selftest = selftest;
	inl_dev->channel = cpt_channel.channel;
	inl_dev->chan_mask = cpt_channel.mask;
	inl_dev->is_multi_channel = cpt_channel.is_multi_channel;
	inl_dev->nb_meta_bufs = nb_meta_bufs;
	inl_dev->meta_buf_sz = meta_buf_sz;
	inl_dev->soft_exp_poll_freq = soft_exp_poll_freq;
	return 0;
exit:
	return -EINVAL;
}

static inline char *
nix_inl_dev_to_name(struct rte_pci_device *pci_dev, char *name)
{
	snprintf(name, CNXK_NIX_INL_DEV_NAME_LEN,
		 CNXK_NIX_INL_DEV_NAME PCI_PRI_FMT, pci_dev->addr.domain,
		 pci_dev->addr.bus, pci_dev->addr.devid,
		 pci_dev->addr.function);

	return name;
}

static int
cnxk_nix_inl_dev_remove(struct rte_pci_device *pci_dev)
{
	char name[CNXK_NIX_INL_DEV_NAME_LEN];
	const struct rte_memzone *mz;
	struct roc_nix_inl_dev *dev;
	int rc;

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return 0;

	mz = rte_memzone_lookup(nix_inl_dev_to_name(pci_dev, name));
	if (!mz)
		return 0;

	dev = mz->addr;

	/* Cleanup inline dev */
	rc = roc_nix_inl_dev_fini(dev);
	if (rc) {
		plt_err("Failed to cleanup inl dev, rc=%d(%s)", rc,
			roc_error_msg_get(rc));
		return rc;
	}

	rte_memzone_free(mz);
	return 0;
}

static int
cnxk_nix_inl_dev_probe(struct rte_pci_driver *pci_drv,
		       struct rte_pci_device *pci_dev)
{
	char name[CNXK_NIX_INL_DEV_NAME_LEN];
	struct roc_nix_inl_dev *inl_dev;
	const struct rte_memzone *mz;
	uint16_t wqe_skip;
	int rc = -ENOMEM;

	RTE_SET_USED(pci_drv);

	rc = roc_plt_init();
	if (rc) {
		plt_err("Failed to initialize platform model, rc=%d", rc);
		return rc;
	}

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return 0;

	mz = rte_memzone_reserve_aligned(nix_inl_dev_to_name(pci_dev, name),
					 sizeof(*inl_dev), SOCKET_ID_ANY, 0,
					 RTE_CACHE_LINE_SIZE);
	if (mz == NULL)
		return rc;

	inl_dev = mz->addr;
	inl_dev->pci_dev = pci_dev;

	/* Parse devargs string */
	rc = nix_inl_parse_devargs(pci_dev->device.devargs, inl_dev);
	if (rc) {
		plt_err("Failed to parse devargs rc=%d", rc);
		goto free_mem;
	}

	inl_dev->attach_cptlf = true;
	/* WQE skip is one for DPDK */
	wqe_skip = RTE_ALIGN_CEIL(sizeof(struct rte_mbuf), ROC_CACHE_LINE_SZ);
	wqe_skip = wqe_skip / ROC_CACHE_LINE_SZ;
	inl_dev->wqe_skip = wqe_skip;
	rc = roc_nix_inl_dev_init(inl_dev);
	if (rc) {
		plt_err("Failed to init nix inl device, rc=%d(%s)", rc,
			roc_error_msg_get(rc));
		goto free_mem;
	}

	return 0;
free_mem:
	rte_memzone_free(mz);
	return rc;
}

static const struct rte_pci_id cnxk_nix_inl_pci_map[] = {
	{RTE_PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_CNXK_RVU_NIX_INL_PF)},
	{RTE_PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_CNXK_RVU_NIX_INL_VF)},
	{
		.vendor_id = 0,
	},
};

static struct rte_pci_driver cnxk_nix_inl_pci = {
	.id_table = cnxk_nix_inl_pci_map,
	.drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_NEED_IOVA_AS_VA,
	.probe = cnxk_nix_inl_dev_probe,
	.remove = cnxk_nix_inl_dev_remove,
};

RTE_PMD_REGISTER_PCI(cnxk_nix_inl, cnxk_nix_inl_pci);
RTE_PMD_REGISTER_PCI_TABLE(cnxk_nix_inl, cnxk_nix_inl_pci_map);
RTE_PMD_REGISTER_KMOD_DEP(cnxk_nix_inl, "vfio-pci");

RTE_PMD_REGISTER_PARAM_STRING(cnxk_nix_inl,
			      CNXK_NIX_INL_SELFTEST "=1"
			      CNXK_NIX_INL_IPSEC_IN_MIN_SPI "=<1-U32_MAX>"
			      CNXK_NIX_INL_IPSEC_IN_MAX_SPI "=<1-U32_MAX>"
			      CNXK_INL_CPT_CHANNEL "=<1-4095>/<1-4095>"
			      CNXK_NIX_INL_NB_META_BUFS "=<1-U32_MAX>"
			      CNXK_NIX_INL_META_BUF_SZ "=<1-U32_MAX>"
			      CNXK_NIX_SOFT_EXP_POLL_FREQ "=<0-U32_MAX>");