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// SPDX-License-Identifier: GPL-2.0
#include <linux/cpumask.h>
#include <linux/dma-mapping.h>
#include <linux/dmapool.h>
#include <linux/delay.h>
#include <linux/gfp.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci_regs.h>
#include <linux/vmalloc.h>
#include <linux/pci.h>
#include "nitrox_dev.h"
#include "nitrox_common.h"
#include "nitrox_req.h"
#include "nitrox_csr.h"
#define CRYPTO_CTX_SIZE 256
/* packet inuput ring alignments */
#define PKTIN_Q_ALIGN_BYTES 16
static int nitrox_cmdq_init(struct nitrox_cmdq *cmdq, int align_bytes)
{
struct nitrox_device *ndev = cmdq->ndev;
cmdq->qsize = (ndev->qlen * cmdq->instr_size) + align_bytes;
cmdq->unalign_base = dma_zalloc_coherent(DEV(ndev), cmdq->qsize,
&cmdq->unalign_dma,
GFP_KERNEL);
if (!cmdq->unalign_base)
return -ENOMEM;
cmdq->dma = PTR_ALIGN(cmdq->unalign_dma, align_bytes);
cmdq->base = cmdq->unalign_base + (cmdq->dma - cmdq->unalign_dma);
cmdq->write_idx = 0;
spin_lock_init(&cmdq->cmd_qlock);
spin_lock_init(&cmdq->resp_qlock);
spin_lock_init(&cmdq->backlog_qlock);
INIT_LIST_HEAD(&cmdq->response_head);
INIT_LIST_HEAD(&cmdq->backlog_head);
INIT_WORK(&cmdq->backlog_qflush, backlog_qflush_work);
atomic_set(&cmdq->pending_count, 0);
atomic_set(&cmdq->backlog_count, 0);
return 0;
}
static void nitrox_cmdq_reset(struct nitrox_cmdq *cmdq)
{
cmdq->write_idx = 0;
atomic_set(&cmdq->pending_count, 0);
atomic_set(&cmdq->backlog_count, 0);
}
static void nitrox_cmdq_cleanup(struct nitrox_cmdq *cmdq)
{
struct nitrox_device *ndev = cmdq->ndev;
if (!cmdq->unalign_base)
return;
cancel_work_sync(&cmdq->backlog_qflush);
dma_free_coherent(DEV(ndev), cmdq->qsize,
cmdq->unalign_base, cmdq->unalign_dma);
nitrox_cmdq_reset(cmdq);
cmdq->dbell_csr_addr = NULL;
cmdq->compl_cnt_csr_addr = NULL;
cmdq->unalign_base = NULL;
cmdq->base = NULL;
cmdq->unalign_dma = 0;
cmdq->dma = 0;
cmdq->qsize = 0;
cmdq->instr_size = 0;
}
static void nitrox_free_pktin_queues(struct nitrox_device *ndev)
{
int i;
for (i = 0; i < ndev->nr_queues; i++) {
struct nitrox_cmdq *cmdq = &ndev->pkt_inq[i];
nitrox_cmdq_cleanup(cmdq);
}
kfree(ndev->pkt_inq);
ndev->pkt_inq = NULL;
}
static int nitrox_alloc_pktin_queues(struct nitrox_device *ndev)
{
int i, err;
ndev->pkt_inq = kcalloc_node(ndev->nr_queues,
sizeof(struct nitrox_cmdq),
GFP_KERNEL, ndev->node);
if (!ndev->pkt_inq)
return -ENOMEM;
for (i = 0; i < ndev->nr_queues; i++) {
struct nitrox_cmdq *cmdq;
u64 offset;
cmdq = &ndev->pkt_inq[i];
cmdq->ndev = ndev;
cmdq->qno = i;
cmdq->instr_size = sizeof(struct nps_pkt_instr);
/* packet input ring doorbell address */
offset = NPS_PKT_IN_INSTR_BAOFF_DBELLX(i);
cmdq->dbell_csr_addr = NITROX_CSR_ADDR(ndev, offset);
/* packet solicit port completion count address */
offset = NPS_PKT_SLC_CNTSX(i);
cmdq->compl_cnt_csr_addr = NITROX_CSR_ADDR(ndev, offset);
err = nitrox_cmdq_init(cmdq, PKTIN_Q_ALIGN_BYTES);
if (err)
goto pktq_fail;
}
return 0;
pktq_fail:
nitrox_free_pktin_queues(ndev);
return err;
}
static int create_crypto_dma_pool(struct nitrox_device *ndev)
{
size_t size;
/* Crypto context pool, 16 byte aligned */
size = CRYPTO_CTX_SIZE + sizeof(struct ctx_hdr);
ndev->ctx_pool = dma_pool_create("nitrox-context",
DEV(ndev), size, 16, 0);
if (!ndev->ctx_pool)
return -ENOMEM;
return 0;
}
static void destroy_crypto_dma_pool(struct nitrox_device *ndev)
{
if (!ndev->ctx_pool)
return;
dma_pool_destroy(ndev->ctx_pool);
ndev->ctx_pool = NULL;
}
/*
* crypto_alloc_context - Allocate crypto context from pool
* @ndev: NITROX Device
*/
void *crypto_alloc_context(struct nitrox_device *ndev)
{
struct ctx_hdr *ctx;
struct crypto_ctx_hdr *chdr;
void *vaddr;
dma_addr_t dma;
chdr = kmalloc(sizeof(*chdr), GFP_KERNEL);
if (!chdr)
return NULL;
vaddr = dma_pool_zalloc(ndev->ctx_pool, GFP_KERNEL, &dma);
if (!vaddr) {
kfree(chdr);
return NULL;
}
/* fill meta data */
ctx = vaddr;
ctx->pool = ndev->ctx_pool;
ctx->dma = dma;
ctx->ctx_dma = dma + sizeof(struct ctx_hdr);
chdr->pool = ndev->ctx_pool;
chdr->dma = dma;
chdr->vaddr = vaddr;
return chdr;
}
/**
* crypto_free_context - Free crypto context to pool
* @ctx: context to free
*/
void crypto_free_context(void *ctx)
{
struct crypto_ctx_hdr *ctxp;
if (!ctx)
return;
ctxp = ctx;
dma_pool_free(ctxp->pool, ctxp->vaddr, ctxp->dma);
kfree(ctxp);
}
/**
* nitrox_common_sw_init - allocate software resources.
* @ndev: NITROX device
*
* Allocates crypto context pools and command queues etc.
*
* Return: 0 on success, or a negative error code on error.
*/
int nitrox_common_sw_init(struct nitrox_device *ndev)
{
int err = 0;
/* per device crypto context pool */
err = create_crypto_dma_pool(ndev);
if (err)
return err;
err = nitrox_alloc_pktin_queues(ndev);
if (err)
destroy_crypto_dma_pool(ndev);
return err;
}
/**
* nitrox_common_sw_cleanup - free software resources.
* @ndev: NITROX device
*/
void nitrox_common_sw_cleanup(struct nitrox_device *ndev)
{
nitrox_free_pktin_queues(ndev);
destroy_crypto_dma_pool(ndev);
}
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