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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
/* command queue alignments */
#define PKT_IN_ALIGN 16
static int cmdq_common_init(struct nitrox_cmdq *cmdq)
{
struct nitrox_device *ndev = cmdq->ndev;
u32 qsize;
qsize = (ndev->qlen) * cmdq->instr_size;
cmdq->head_unaligned = dma_zalloc_coherent(DEV(ndev),
(qsize + PKT_IN_ALIGN),
&cmdq->dma_unaligned,
GFP_KERNEL);
if (!cmdq->head_unaligned)
return -ENOMEM;
cmdq->head = PTR_ALIGN(cmdq->head_unaligned, PKT_IN_ALIGN);
cmdq->dma = PTR_ALIGN(cmdq->dma_unaligned, PKT_IN_ALIGN);
cmdq->qsize = (qsize + PKT_IN_ALIGN);
spin_lock_init(&cmdq->response_lock);
spin_lock_init(&cmdq->cmdq_lock);
spin_lock_init(&cmdq->backlog_lock);
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 cmdq_common_cleanup(struct nitrox_cmdq *cmdq)
{
struct nitrox_device *ndev = cmdq->ndev;
cancel_work_sync(&cmdq->backlog_qflush);
dma_free_coherent(DEV(ndev), cmdq->qsize,
cmdq->head_unaligned, cmdq->dma_unaligned);
atomic_set(&cmdq->pending_count, 0);
atomic_set(&cmdq->backlog_count, 0);
cmdq->dbell_csr_addr = NULL;
cmdq->head = NULL;
cmdq->dma = 0;
cmdq->qsize = 0;
cmdq->instr_size = 0;
}
static void nitrox_cleanup_pkt_cmdqs(struct nitrox_device *ndev)
{
int i;
for (i = 0; i < ndev->nr_queues; i++) {
struct nitrox_cmdq *cmdq = &ndev->pkt_cmdqs[i];
cmdq_common_cleanup(cmdq);
}
kfree(ndev->pkt_cmdqs);
ndev->pkt_cmdqs = NULL;
}
static int nitrox_init_pkt_cmdqs(struct nitrox_device *ndev)
{
int i, err, size;
size = ndev->nr_queues * sizeof(struct nitrox_cmdq);
ndev->pkt_cmdqs = kzalloc(size, GFP_KERNEL);
if (!ndev->pkt_cmdqs)
return -ENOMEM;
for (i = 0; i < ndev->nr_queues; i++) {
struct nitrox_cmdq *cmdq;
u64 offset;
cmdq = &ndev->pkt_cmdqs[i];
cmdq->ndev = ndev;
cmdq->qno = i;
cmdq->instr_size = sizeof(struct nps_pkt_instr);
offset = NPS_PKT_IN_INSTR_BAOFF_DBELLX(i);
/* SE ring doorbell address for this queue */
cmdq->dbell_csr_addr = NITROX_CSR_ADDR(ndev, offset);
err = cmdq_common_init(cmdq);
if (err)
goto pkt_cmdq_fail;
}
return 0;
pkt_cmdq_fail:
nitrox_cleanup_pkt_cmdqs(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("crypto-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;
void *vaddr;
dma_addr_t dma;
vaddr = dma_pool_alloc(ndev->ctx_pool, (GFP_ATOMIC | __GFP_ZERO), &dma);
if (!vaddr)
return NULL;
/* fill meta data */
ctx = vaddr;
ctx->pool = ndev->ctx_pool;
ctx->dma = dma;
ctx->ctx_dma = dma + sizeof(struct ctx_hdr);
return ((u8 *)vaddr + sizeof(struct ctx_hdr));
}
/**
* crypto_free_context - Free crypto context to pool
* @ctx: context to free
*/
void crypto_free_context(void *ctx)
{
struct ctx_hdr *ctxp;
if (!ctx)
return;
ctxp = (struct ctx_hdr *)((u8 *)ctx - sizeof(struct ctx_hdr));
dma_pool_free(ctxp->pool, ctxp, ctxp->dma);
}
/**
* 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_init_pkt_cmdqs(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_cleanup_pkt_cmdqs(ndev);
destroy_crypto_dma_pool(ndev);
}
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