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Message-ID: <7e5eb00f-3f16-5226-1f5b-0a7e9ab8d5af@caviumnetworks.com>
Date: Sat, 4 Feb 2017 10:07:19 +0530
From: George Cherian <gcherian@...iumnetworks.com>
To: Sasha Levin <levinsasha928@...il.com>,
George Cherian <george.cherian@...ium.com>
CC: Herbert Xu <herbert@...dor.apana.org.au>,
davem <davem@...emloft.net>, <david.daney@...ium.com>,
<clabbe.montjoie@...il.com>, <smueller@...onox.de>,
"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
<linux-crypto@...r.kernel.org>, <alexander.levin@...izon.com>
Subject: Re: [PATCH v5 2/3] drivers: crypto: Add the Virtual Function driver
for CPT
Hi Sasha,
Thanks for the reveiw.
On Friday 03 February 2017 12:24 AM, Sasha Levin wrote:
> On Mon, Jan 30, 2017 at 7:30 AM, George Cherian
> <george.cherian@...ium.com> wrote:
>> diff --git a/drivers/crypto/cavium/cpt/cptvf_main.c b/drivers/crypto/cavium/cpt/cptvf_main.c
>> new file mode 100644
>> index 0000000..4cf466d
>> --- /dev/null
>> +++ b/drivers/crypto/cavium/cpt/cptvf_main.c
>> @@ -0,0 +1,948 @@
>> +/*
>> + * Copyright (C) 2016 Cavium, Inc.
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> + * it under the terms of version 2 of the GNU General Public License
>> + * as published by the Free Software Foundation.
>> + */
>> +
>> +#include <linux/interrupt.h>
>> +#include <linux/module.h>
>> +
>> +#include "cptvf.h"
>> +
>> +#define DRV_NAME "thunder-cptvf"
>> +#define DRV_VERSION "1.0"
>> +
>> +struct cptvf_wqe {
>> + struct tasklet_struct twork;
>> + void *cptvf;
>> + u32 qno;
>> +};
>> +
>> +struct cptvf_wqe_info {
>> + struct cptvf_wqe vq_wqe[CPT_NUM_QS_PER_VF];
>> +};
>> +
>> +static void vq_work_handler(unsigned long data)
>> +{
>> + struct cptvf_wqe_info *cwqe_info = (struct cptvf_wqe_info *)data;
>> + struct cptvf_wqe *cwqe = &cwqe_info->vq_wqe[0];
>> +
>> + vq_post_process(cwqe->cptvf, cwqe->qno);
>> +}
>> +
>> +static int init_worker_threads(struct cpt_vf *cptvf)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + struct cptvf_wqe_info *cwqe_info;
>> + int i;
>> +
>> + cwqe_info = kzalloc(sizeof(*cwqe_info), GFP_KERNEL);
>> + if (!cwqe_info)
>> + return -ENOMEM;
>> +
>> + if (cptvf->nr_queues) {
>> + dev_info(&pdev->dev, "Creating VQ worker threads (%d)\n",
>> + cptvf->nr_queues);
>> + }
>> +
>> + for (i = 0; i < cptvf->nr_queues; i++) {
>> + tasklet_init(&cwqe_info->vq_wqe[i].twork, vq_work_handler,
>> + (u64)cwqe_info);
>> + cwqe_info->vq_wqe[i].qno = i;
>> + cwqe_info->vq_wqe[i].cptvf = cptvf;
>> + }
>> +
>> + cptvf->wqe_info = cwqe_info;
>> +
>> + return 0;
>> +}
>> +
>> +static void cleanup_worker_threads(struct cpt_vf *cptvf)
>> +{
>> + struct cptvf_wqe_info *cwqe_info;
>> + struct pci_dev *pdev = cptvf->pdev;
>> + int i;
>> +
>> + cwqe_info = (struct cptvf_wqe_info *)cptvf->wqe_info;
>> + if (!cwqe_info)
>> + return;
>> +
>> + if (cptvf->nr_queues) {
>> + dev_info(&pdev->dev, "Cleaning VQ worker threads (%u)\n",
>> + cptvf->nr_queues);
>> + }
>> +
>> + for (i = 0; i < cptvf->nr_queues; i++)
>> + tasklet_kill(&cwqe_info->vq_wqe[i].twork);
>> +
>> + kzfree(cwqe_info);
>> + cptvf->wqe_info = NULL;
>> +}
>> +
>> +static void free_pending_queues(struct pending_qinfo *pqinfo)
>> +{
>> + int i;
>> + struct pending_queue *queue;
>> +
>> + for_each_pending_queue(pqinfo, queue, i) {
>> + if (!queue->head)
>> + continue;
>> +
>> + /* free single queue */
>> + kzfree((queue->head));
>> +
>> + queue->front = 0;
>> + queue->rear = 0;
>> +
>> + return;
>> + }
>> +
>> + pqinfo->qlen = 0;
>> + pqinfo->nr_queues = 0;
>> +}
>> +
>> +static int alloc_pending_queues(struct pending_qinfo *pqinfo, u32 qlen,
>> + u32 nr_queues)
>> +{
>> + u32 i;
>> + size_t size;
>> + int ret;
>> + struct pending_queue *queue = NULL;
>> +
>> + pqinfo->nr_queues = nr_queues;
>> + pqinfo->qlen = qlen;
>> +
>> + size = (qlen * sizeof(struct pending_entry));
>> +
>> + for_each_pending_queue(pqinfo, queue, i) {
>> + queue->head = kzalloc((size), GFP_KERNEL);
>> + if (!queue->head) {
>> + ret = -ENOMEM;
>> + goto pending_qfail;
>> + }
>> +
>> + queue->front = 0;
>> + queue->rear = 0;
>> + atomic64_set((&queue->pending_count), (0));
>> +
>> + /* init queue spin lock */
>> + spin_lock_init(&queue->lock);
>> + }
>> +
>> + return 0;
>> +
>> +pending_qfail:
>> + free_pending_queues(pqinfo);
>> +
>> + return ret;
>> +}
>> +
>> +static int init_pending_queues(struct cpt_vf *cptvf, u32 qlen, u32 nr_queues)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + int ret;
>> +
>> + if (!nr_queues)
>> + return 0;
>> +
>> + ret = alloc_pending_queues(&cptvf->pqinfo, qlen, nr_queues);
>> + if (ret) {
>> + dev_err(&pdev->dev, "failed to setup pending queues (%u)\n",
>> + nr_queues);
>> + return ret;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static void cleanup_pending_queues(struct cpt_vf *cptvf)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> +
>> + if (!cptvf->nr_queues)
>> + return;
>> +
>> + dev_info(&pdev->dev, "Cleaning VQ pending queue (%u)\n",
>> + cptvf->nr_queues);
>> + free_pending_queues(&cptvf->pqinfo);
>> +}
>> +
>> +static void free_command_queues(struct cpt_vf *cptvf,
>> + struct command_qinfo *cqinfo)
>> +{
>> + int i, j;
>> + struct command_queue *queue = NULL;
>> + struct command_chunk *chunk = NULL, *next = NULL;
>> + struct pci_dev *pdev = cptvf->pdev;
>> + struct hlist_node *node;
>> +
>> + /* clean up for each queue */
>> + for (i = 0; i < cptvf->nr_queues; i++) {
>> + queue = &cqinfo->queue[i];
>> + if (hlist_empty(&cqinfo->queue[i].chead))
>> + continue;
>> +
>> + hlist_for_each(node, &cqinfo->queue[i].chead) {
>> + chunk = hlist_entry(node, struct command_chunk,
>> + nextchunk);
>> + break;
>> + }
> What exactly is the purpose of that loop?
>
>> + for (j = 0; j < queue->nchunks; j++) {
>> + if (j < queue->nchunks) {
> We already know that "j < queue->nchunks" at this point...
>
>> + node = node->next;
>> + next = hlist_entry(node, struct command_chunk,
>> + nextchunk);
>> + }
>> +
>> + dma_free_coherent(&pdev->dev, chunk->size,
>> + chunk->head,
>> + chunk->dma_addr);
>> + chunk->head = NULL;
>> + chunk->dma_addr = 0;
>> + hlist_del(&chunk->nextchunk);
>> + kzfree(chunk);
>> + chunk = next;
>> + }
>> + queue->nchunks = 0;
>> + queue->idx = 0;
>> + }
> This whole function looks like an attempt to open code
> hlist_for_each_entry_safe(), why didn't you just use that?
Yes you are right I could use hlist_for_each_entry_safe(). will fix it
in next version
>> +
>> + /* common cleanup */
>> + cqinfo->cmd_size = 0;
>> +}
>> +
>> +static int alloc_command_queues(struct cpt_vf *cptvf,
>> + struct command_qinfo *cqinfo, size_t cmd_size,
>> + u32 qlen)
>> +{
>> + int i;
>> + size_t q_size;
>> + struct command_queue *queue = NULL;
>> + struct pci_dev *pdev = cptvf->pdev;
>> +
>> + /* common init */
>> + cqinfo->cmd_size = cmd_size;
>> + /* Qsize in dwords, needed for SADDR config, 1-next chunk pointer */
>> + cptvf->qsize = min(qlen, cqinfo->qchunksize) *
>> + CPT_NEXT_CHUNK_PTR_SIZE + 1;
>> + /* Qsize in bytes to create space for alignment */
>> + q_size = qlen * cqinfo->cmd_size;
>> +
>> + /* per queue initialization */
>> + for (i = 0; i < cptvf->nr_queues; i++) {
>> + size_t c_size = 0;
>> + size_t rem_q_size = q_size;
>> + struct command_chunk *curr = NULL, *first = NULL, *last = NULL;
>> + u32 qcsize_bytes = cqinfo->qchunksize * cqinfo->cmd_size;
>> +
>> + queue = &cqinfo->queue[i];
>> + INIT_HLIST_HEAD(&cqinfo->queue[i].chead);
>> + do {
>> + curr = kzalloc(sizeof(*curr), GFP_KERNEL);
>> + if (!curr)
>> + goto cmd_qfail;
>> +
>> + c_size = (rem_q_size > qcsize_bytes) ? qcsize_bytes :
>> + rem_q_size;
>> + curr->head = (u8 *)dma_zalloc_coherent(&pdev->dev,
>> + c_size + CPT_NEXT_CHUNK_PTR_SIZE,
>> + &curr->dma_addr, GFP_KERNEL);
>> + if (!curr->head) {
>> + dev_err(&pdev->dev, "Command Q (%d) chunk (%d) allocation failed\n",
>> + i, queue->nchunks);
>> + goto cmd_qfail;
>> + }
>> +
>> + curr->size = c_size;
>> + if (queue->nchunks == 0) {
>> + hlist_add_head(&curr->nextchunk,
>> + &cqinfo->queue[i].chead);
>> + first = curr;
>> + } else {
>> + hlist_add_behind(&curr->nextchunk,
>> + &last->nextchunk);
>> + }
>> +
>> + queue->nchunks++;
>> + rem_q_size -= c_size;
>> + if (last)
>> + *((u64 *)(&last->head[last->size])) = (u64)curr->dma_addr;
>> +
>> + last = curr;
>> + } while (rem_q_size);
>> +
>> + /* Make the queue circular */
>> + /* Tie back last chunk entry to head */
>> + curr = first;
>> + *((u64 *)(&last->head[last->size])) = (u64)curr->dma_addr;
>> + last->nextchunk.next = &curr->nextchunk;
> You shouldn't access the hlist struct members directly, use helper
> functions here.
okay
>> + queue->qhead = curr;
>> + spin_lock_init(&queue->lock);
>> + }
>> + return 0;
>> +
>> +cmd_qfail:
>> + free_command_queues(cptvf, cqinfo);
>> + return -ENOMEM;
>> +}
>> +
>> +static int init_command_queues(struct cpt_vf *cptvf, u32 qlen)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + int ret;
>> +
>> + /* setup AE command queues */
>> + ret = alloc_command_queues(cptvf, &cptvf->cqinfo, CPT_INST_SIZE,
>> + qlen);
>> + if (ret) {
>> + dev_err(&pdev->dev, "failed to allocate AE command queues (%u)\n",
>> + cptvf->nr_queues);
>> + return ret;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static void cleanup_command_queues(struct cpt_vf *cptvf)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> +
>> + if (!cptvf->nr_queues)
>> + return;
>> +
>> + dev_info(&pdev->dev, "Cleaning VQ command queue (%u)\n",
>> + cptvf->nr_queues);
>> + free_command_queues(cptvf, &cptvf->cqinfo);
>> +}
>> +
>> +static void cptvf_sw_cleanup(struct cpt_vf *cptvf)
>> +{
>> + cleanup_worker_threads(cptvf);
>> + cleanup_pending_queues(cptvf);
>> + cleanup_command_queues(cptvf);
>> +}
>> +
>> +static int cptvf_sw_init(struct cpt_vf *cptvf, u32 qlen, u32 nr_queues)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + int ret = 0;
>> + u32 max_dev_queues = 0;
>> +
>> + max_dev_queues = CPT_NUM_QS_PER_VF;
>> + /* possible cpus */
>> + nr_queues = min_t(u32, nr_queues, max_dev_queues);
>> + cptvf->nr_queues = nr_queues;
>> +
>> + ret = init_command_queues(cptvf, qlen);
>> + if (ret) {
>> + dev_err(&pdev->dev, "Failed to setup command queues (%u)\n",
>> + nr_queues);
>> + return ret;
>> + }
>> +
>> + ret = init_pending_queues(cptvf, qlen, nr_queues);
>> + if (ret) {
>> + dev_err(&pdev->dev, "Failed to setup pending queues (%u)\n",
>> + nr_queues);
>> + goto setup_pqfail;
>> + }
>> +
>> + /* Create worker threads for BH processing */
>> + ret = init_worker_threads(cptvf);
>> + if (ret) {
>> + dev_err(&pdev->dev, "Failed to setup worker threads\n");
>> + goto init_work_fail;
>> + }
>> +
>> + return 0;
>> +
>> +init_work_fail:
>> + cleanup_worker_threads(cptvf);
>> + cleanup_pending_queues(cptvf);
>> +
>> +setup_pqfail:
>> + cleanup_command_queues(cptvf);
>> +
>> + return ret;
>> +}
>> +
>> +static void cptvf_disable_msix(struct cpt_vf *cptvf)
>> +{
>> + if (cptvf->msix_enabled) {
>> + pci_disable_msix(cptvf->pdev);
>> + cptvf->msix_enabled = 0;
>> + }
>> +}
>> +
>> +static int cptvf_enable_msix(struct cpt_vf *cptvf)
>> +{
>> + int i, ret;
>> +
>> + for (i = 0; i < CPT_VF_MSIX_VECTORS; i++)
>> + cptvf->msix_entries[i].entry = i;
>> +
>> + ret = pci_enable_msix(cptvf->pdev, cptvf->msix_entries,
>> + CPT_VF_MSIX_VECTORS);
>> + if (ret) {
>> + dev_err(&cptvf->pdev->dev, "Request for #%d msix vectors failed\n",
>> + CPT_VF_MSIX_VECTORS);
>> + return ret;
>> + }
>> +
>> + cptvf->msix_enabled = 1;
>> + /* Mark MSIX enabled */
>> + cptvf->flags |= CPT_FLAG_MSIX_ENABLED;
>> +
>> + return 0;
>> +}
>> +
>> +static void cptvf_free_all_interrupts(struct cpt_vf *cptvf)
>> +{
>> + int irq;
>> +
>> + for (irq = 0; irq < CPT_VF_MSIX_VECTORS; irq++) {
>> + if (cptvf->irq_allocated[irq])
>> + irq_set_affinity_hint(cptvf->msix_entries[irq].vector,
>> + NULL);
>> + free_cpumask_var(cptvf->affinity_mask[irq]);
>> + free_irq(cptvf->msix_entries[irq].vector, cptvf);
>> + cptvf->irq_allocated[irq] = false;
>> + }
>> +}
>> +
>> +static void cptvf_write_vq_ctl(struct cpt_vf *cptvf, bool val)
>> +{
>> + union cptx_vqx_ctl vqx_ctl;
>> +
>> + vqx_ctl.u = cpt_read_csr64(cptvf->reg_base, CPTX_VQX_CTL(0, 0));
>> + vqx_ctl.s.ena = val;
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_CTL(0, 0), vqx_ctl.u);
>> +}
>> +
>> +void cptvf_write_vq_doorbell(struct cpt_vf *cptvf, u32 val)
>> +{
>> + union cptx_vqx_doorbell vqx_dbell;
>> +
>> + vqx_dbell.u = cpt_read_csr64(cptvf->reg_base,
>> + CPTX_VQX_DOORBELL(0, 0));
>> + vqx_dbell.s.dbell_cnt = val * 8; /* Num of Instructions * 8 words */
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_DOORBELL(0, 0),
>> + vqx_dbell.u);
>> +}
>> +
>> +static void cptvf_write_vq_inprog(struct cpt_vf *cptvf, u8 val)
>> +{
>> + union cptx_vqx_inprog vqx_inprg;
>> +
>> + vqx_inprg.u = cpt_read_csr64(cptvf->reg_base, CPTX_VQX_INPROG(0, 0));
>> + vqx_inprg.s.inflight = val;
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_INPROG(0, 0), vqx_inprg.u);
>> +}
>> +
>> +static void cptvf_write_vq_done_numwait(struct cpt_vf *cptvf, u32 val)
>> +{
>> + union cptx_vqx_done_wait vqx_dwait;
>> +
>> + vqx_dwait.u = cpt_read_csr64(cptvf->reg_base,
>> + CPTX_VQX_DONE_WAIT(0, 0));
>> + vqx_dwait.s.num_wait = val;
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_DONE_WAIT(0, 0),
>> + vqx_dwait.u);
>> +}
>> +
>> +static void cptvf_write_vq_done_timewait(struct cpt_vf *cptvf, u16 time)
>> +{
>> + union cptx_vqx_done_wait vqx_dwait;
>> +
>> + vqx_dwait.u = cpt_read_csr64(cptvf->reg_base,
>> + CPTX_VQX_DONE_WAIT(0, 0));
>> + vqx_dwait.s.time_wait = time;
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_DONE_WAIT(0, 0),
>> + vqx_dwait.u);
>> +}
>> +
>> +static void cptvf_enable_swerr_interrupts(struct cpt_vf *cptvf)
>> +{
>> + union cptx_vqx_misc_ena_w1s vqx_misc_ena;
>> +
>> + vqx_misc_ena.u = cpt_read_csr64(cptvf->reg_base,
>> + CPTX_VQX_MISC_ENA_W1S(0, 0));
>> + /* Set mbox(0) interupts for the requested vf */
>> + vqx_misc_ena.s.swerr = 1;
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_MISC_ENA_W1S(0, 0),
>> + vqx_misc_ena.u);
>> +}
>> +
>> +static void cptvf_enable_mbox_interrupts(struct cpt_vf *cptvf)
>> +{
>> + union cptx_vqx_misc_ena_w1s vqx_misc_ena;
>> +
>> + vqx_misc_ena.u = cpt_read_csr64(cptvf->reg_base,
>> + CPTX_VQX_MISC_ENA_W1S(0, 0));
>> + /* Set mbox(0) interupts for the requested vf */
>> + vqx_misc_ena.s.mbox = 1;
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_MISC_ENA_W1S(0, 0),
>> + vqx_misc_ena.u);
>> +}
>> +
>> +static void cptvf_enable_done_interrupts(struct cpt_vf *cptvf)
>> +{
>> + union cptx_vqx_done_ena_w1s vqx_done_ena;
>> +
>> + vqx_done_ena.u = cpt_read_csr64(cptvf->reg_base,
>> + CPTX_VQX_DONE_ENA_W1S(0, 0));
>> + /* Set DONE interrupt for the requested vf */
>> + vqx_done_ena.s.done = 1;
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_DONE_ENA_W1S(0, 0),
>> + vqx_done_ena.u);
>> +}
>> +
>> +static void cptvf_clear_dovf_intr(struct cpt_vf *cptvf)
>> +{
>> + union cptx_vqx_misc_int vqx_misc_int;
>> +
>> + vqx_misc_int.u = cpt_read_csr64(cptvf->reg_base,
>> + CPTX_VQX_MISC_INT(0, 0));
>> + /* W1C for the VF */
>> + vqx_misc_int.s.dovf = 1;
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_MISC_INT(0, 0),
>> + vqx_misc_int.u);
>> +}
>> +
>> +static void cptvf_clear_irde_intr(struct cpt_vf *cptvf)
>> +{
>> + union cptx_vqx_misc_int vqx_misc_int;
>> +
>> + vqx_misc_int.u = cpt_read_csr64(cptvf->reg_base,
>> + CPTX_VQX_MISC_INT(0, 0));
>> + /* W1C for the VF */
>> + vqx_misc_int.s.irde = 1;
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_MISC_INT(0, 0),
>> + vqx_misc_int.u);
>> +}
>> +
>> +static void cptvf_clear_nwrp_intr(struct cpt_vf *cptvf)
>> +{
>> + union cptx_vqx_misc_int vqx_misc_int;
>> +
>> + vqx_misc_int.u = cpt_read_csr64(cptvf->reg_base,
>> + CPTX_VQX_MISC_INT(0, 0));
>> + /* W1C for the VF */
>> + vqx_misc_int.s.nwrp = 1;
>> + cpt_write_csr64(cptvf->reg_base,
>> + CPTX_VQX_MISC_INT(0, 0), vqx_misc_int.u);
>> +}
>> +
>> +static void cptvf_clear_mbox_intr(struct cpt_vf *cptvf)
>> +{
>> + union cptx_vqx_misc_int vqx_misc_int;
>> +
>> + vqx_misc_int.u = cpt_read_csr64(cptvf->reg_base,
>> + CPTX_VQX_MISC_INT(0, 0));
>> + /* W1C for the VF */
>> + vqx_misc_int.s.mbox = 1;
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_MISC_INT(0, 0),
>> + vqx_misc_int.u);
>> +}
>> +
>> +static void cptvf_clear_swerr_intr(struct cpt_vf *cptvf)
>> +{
>> + union cptx_vqx_misc_int vqx_misc_int;
>> +
>> + vqx_misc_int.u = cpt_read_csr64(cptvf->reg_base,
>> + CPTX_VQX_MISC_INT(0, 0));
>> + /* W1C for the VF */
>> + vqx_misc_int.s.swerr = 1;
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_MISC_INT(0, 0),
>> + vqx_misc_int.u);
>> +}
>> +
>> +static u64 cptvf_read_vf_misc_intr_status(struct cpt_vf *cptvf)
>> +{
>> + return cpt_read_csr64(cptvf->reg_base, CPTX_VQX_MISC_INT(0, 0));
>> +}
>> +
>> +static irqreturn_t cptvf_misc_intr_handler(int irq, void *cptvf_irq)
>> +{
>> + struct cpt_vf *cptvf = (struct cpt_vf *)cptvf_irq;
>> + struct pci_dev *pdev = cptvf->pdev;
>> + u64 intr;
>> +
>> + intr = cptvf_read_vf_misc_intr_status(cptvf);
>> + /*Check for MISC interrupt types*/
>> + if (likely(intr & CPT_VF_INTR_MBOX_MASK)) {
>> + dev_err(&pdev->dev, "Mailbox interrupt 0x%llx on CPT VF %d\n",
>> + intr, cptvf->vfid);
>> + cptvf_handle_mbox_intr(cptvf);
>> + cptvf_clear_mbox_intr(cptvf);
>> + } else if (unlikely(intr & CPT_VF_INTR_DOVF_MASK)) {
>> + cptvf_clear_dovf_intr(cptvf);
>> + /*Clear doorbell count*/
>> + cptvf_write_vq_doorbell(cptvf, 0);
>> + dev_err(&pdev->dev, "Doorbell overflow error interrupt 0x%llx on CPT VF %d\n",
>> + intr, cptvf->vfid);
>> + } else if (unlikely(intr & CPT_VF_INTR_IRDE_MASK)) {
>> + cptvf_clear_irde_intr(cptvf);
>> + dev_err(&pdev->dev, "Instruction NCB read error interrupt 0x%llx on CPT VF %d\n",
>> + intr, cptvf->vfid);
>> + } else if (unlikely(intr & CPT_VF_INTR_NWRP_MASK)) {
>> + cptvf_clear_nwrp_intr(cptvf);
>> + dev_err(&pdev->dev, "NCB response write error interrupt 0x%llx on CPT VF %d\n",
>> + intr, cptvf->vfid);
>> + } else if (unlikely(intr & CPT_VF_INTR_SERR_MASK)) {
>> + cptvf_clear_swerr_intr(cptvf);
>> + dev_err(&pdev->dev, "Software error interrupt 0x%llx on CPT VF %d\n",
>> + intr, cptvf->vfid);
>> + } else {
>> + dev_err(&pdev->dev, "Unhandled interrupt in CPT VF %d\n",
>> + cptvf->vfid);
>> + }
>> +
>> + return IRQ_HANDLED;
>> +}
>> +
>> +static inline struct cptvf_wqe *get_cptvf_vq_wqe(struct cpt_vf *cptvf,
>> + int qno)
>> +{
>> + struct cptvf_wqe_info *nwqe_info;
>> +
>> + if (unlikely(qno >= cptvf->nr_queues))
>> + return NULL;
>> + nwqe_info = (struct cptvf_wqe_info *)cptvf->wqe_info;
>> +
>> + return &nwqe_info->vq_wqe[qno];
>> +}
>> +
>> +static inline u32 cptvf_read_vq_done_count(struct cpt_vf *cptvf)
>> +{
>> + union cptx_vqx_done vqx_done;
>> +
>> + vqx_done.u = cpt_read_csr64(cptvf->reg_base, CPTX_VQX_DONE(0, 0));
>> + return vqx_done.s.done;
>> +}
>> +
>> +static inline void cptvf_write_vq_done_ack(struct cpt_vf *cptvf,
>> + u32 ackcnt)
>> +{
>> + union cptx_vqx_done_ack vqx_dack_cnt;
>> +
>> + vqx_dack_cnt.u = cpt_read_csr64(cptvf->reg_base,
>> + CPTX_VQX_DONE_ACK(0, 0));
>> + vqx_dack_cnt.s.done_ack = ackcnt;
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_DONE_ACK(0, 0),
>> + vqx_dack_cnt.u);
>> +}
>> +
>> +static irqreturn_t cptvf_done_intr_handler(int irq, void *cptvf_irq)
>> +{
>> + struct cpt_vf *cptvf = (struct cpt_vf *)cptvf_irq;
>> + struct pci_dev *pdev = cptvf->pdev;
>> + /* Read the number of completions */
>> + u32 intr = cptvf_read_vq_done_count(cptvf);
>> +
>> + if (intr) {
>> + struct cptvf_wqe *wqe;
>> +
>> + /* Acknowledge the number of
>> + * scheduled completions for processing
>> + */
>> + cptvf_write_vq_done_ack(cptvf, intr);
>> + wqe = get_cptvf_vq_wqe(cptvf, 0);
>> + if (unlikely(!wqe)) {
>> + dev_err(&pdev->dev, "No work to schedule for VF (%d)",
>> + cptvf->vfid);
>> + return IRQ_NONE;
>> + }
>> + tasklet_hi_schedule(&wqe->twork);
>> + }
>> +
>> + return IRQ_HANDLED;
>> +}
>> +
>> +static int cptvf_register_misc_intr(struct cpt_vf *cptvf)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + int ret;
>> +
>> + /* Register misc interrupt handlers */
>> + ret = request_irq(cptvf->msix_entries[CPT_VF_INT_VEC_E_MISC].vector,
>> + cptvf_misc_intr_handler, 0, "CPT VF misc intr",
>> + cptvf);
>> + if (ret)
>> + goto fail;
>> +
>> + cptvf->irq_allocated[CPT_VF_INT_VEC_E_MISC] = true;
>> +
>> + /* Enable mailbox interrupt */
>> + cptvf_enable_mbox_interrupts(cptvf);
>> + cptvf_enable_swerr_interrupts(cptvf);
>> +
>> + return 0;
>> +
>> +fail:
>> + dev_err(&pdev->dev, "Request misc irq failed");
>> + cptvf_free_all_interrupts(cptvf);
>> + return ret;
>> +}
>> +
>> +static int cptvf_register_done_intr(struct cpt_vf *cptvf)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + int ret;
>> +
>> + /* Register DONE interrupt handlers */
>> + ret = request_irq(cptvf->msix_entries[CPT_VF_INT_VEC_E_DONE].vector,
>> + cptvf_done_intr_handler, 0, "CPT VF done intr",
>> + cptvf);
>> + if (ret)
>> + goto fail;
>> +
>> + cptvf->irq_allocated[CPT_VF_INT_VEC_E_DONE] = true;
>> +
>> + /* Enable mailbox interrupt */
>> + cptvf_enable_done_interrupts(cptvf);
>> + return 0;
>> +
>> +fail:
>> + dev_err(&pdev->dev, "Request done irq failed\n");
>> + cptvf_free_all_interrupts(cptvf);
>> + return ret;
>> +}
>> +
>> +static void cptvf_unregister_interrupts(struct cpt_vf *cptvf)
>> +{
>> + cptvf_free_all_interrupts(cptvf);
>> + cptvf_disable_msix(cptvf);
>> +}
>> +
>> +static void cptvf_set_irq_affinity(struct cpt_vf *cptvf)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + int vec, cpu;
>> + int irqnum;
>> +
>> + for (vec = 0; vec < CPT_VF_MSIX_VECTORS; vec++) {
>> + if (!cptvf->irq_allocated[vec])
>> + continue;
>> +
>> + if (!zalloc_cpumask_var(&cptvf->affinity_mask[vec],
>> + GFP_KERNEL)) {
>> + dev_err(&pdev->dev, "Allocation failed for affinity_mask for VF %d",
>> + cptvf->vfid);
>> + return;
>> + }
>> +
>> + cpu = cptvf->vfid % num_online_cpus();
>> + cpumask_set_cpu(cpumask_local_spread(cpu, cptvf->node),
>> + cptvf->affinity_mask[vec]);
>> + irqnum = cptvf->msix_entries[vec].vector;
>> + irq_set_affinity_hint(irqnum, cptvf->affinity_mask[vec]);
>> + }
>> +}
>> +
>> +static void cptvf_write_vq_saddr(struct cpt_vf *cptvf, u64 val)
>> +{
>> + union cptx_vqx_saddr vqx_saddr;
>> +
>> + vqx_saddr.u = val;
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VQX_SADDR(0, 0), vqx_saddr.u);
>> +}
>> +
>> +void cptvf_device_init(struct cpt_vf *cptvf)
>> +{
>> + u64 base_addr = 0;
>> +
>> + /* Disable the VQ */
>> + cptvf_write_vq_ctl(cptvf, 0);
>> + /* Reset the doorbell */
>> + cptvf_write_vq_doorbell(cptvf, 0);
>> + /* Clear inflight */
>> + cptvf_write_vq_inprog(cptvf, 0);
>> + /* Write VQ SADDR */
>> + /* TODO: for now only one queue, so hard coded */
>> + base_addr = (u64)(cptvf->cqinfo.queue[0].qhead->dma_addr);
>> + cptvf_write_vq_saddr(cptvf, base_addr);
>> + /* Configure timerhold / coalescence */
>> + cptvf_write_vq_done_timewait(cptvf, CPT_TIMER_THOLD);
>> + cptvf_write_vq_done_numwait(cptvf, 1);
>> + /* Enable the VQ */
>> + cptvf_write_vq_ctl(cptvf, 1);
>> + /* Flag the VF ready */
>> + cptvf->flags |= CPT_FLAG_DEVICE_READY;
>> +}
>> +
>> +static int cptvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
>> +{
>> + struct device *dev = &pdev->dev;
>> + struct cpt_vf *cptvf;
>> + int err;
>> +
>> + cptvf = devm_kzalloc(dev, sizeof(*cptvf), GFP_KERNEL);
>> + if (!cptvf)
>> + return -ENOMEM;
>> +
>> + pci_set_drvdata(pdev, cptvf);
>> + cptvf->pdev = pdev;
>> + err = pci_enable_device(pdev);
>> + if (err) {
>> + dev_err(dev, "Failed to enable PCI device\n");
>> + pci_set_drvdata(pdev, NULL);
>> + return err;
>> + }
>> +
>> + err = pci_request_regions(pdev, DRV_NAME);
>> + if (err) {
>> + dev_err(dev, "PCI request regions failed 0x%x\n", err);
>> + goto cptvf_err_disable_device;
>> + }
>> + /* Mark as VF driver */
>> + cptvf->flags |= CPT_FLAG_VF_DRIVER;
>> + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(48));
>> + if (err) {
>> + dev_err(dev, "Unable to get usable DMA configuration\n");
>> + goto cptvf_err_release_regions;
>> + }
>> +
>> + err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(48));
>> + if (err) {
>> + dev_err(dev, "Unable to get 48-bit DMA for consistent allocations\n");
>> + goto cptvf_err_release_regions;
>> + }
>> +
>> + /* MAP PF's configuration registers */
>> + cptvf->reg_base = pcim_iomap(pdev, 0, 0);
>> + if (!cptvf->reg_base) {
>> + dev_err(dev, "Cannot map config register space, aborting\n");
>> + err = -ENOMEM;
>> + goto cptvf_err_release_regions;
>> + }
>> +
>> + cptvf->node = dev_to_node(&pdev->dev);
>> + /* Enable MSI-X */
>> + err = cptvf_enable_msix(cptvf);
>> + if (err) {
>> + dev_err(dev, "cptvf_enable_msix() failed");
>> + goto cptvf_err_release_regions;
>> + }
>> +
>> + /* Register mailbox interrupts */
>> + cptvf_register_misc_intr(cptvf);
>> +
>> + /* Check ready with PF */
>> + /* Gets chip ID / device Id from PF if ready */
>> + err = cptvf_check_pf_ready(cptvf);
>> + if (err) {
>> + dev_err(dev, "PF not responding to READY msg");
>> + goto cptvf_err_release_regions;
>> + }
>> +
>> + /* CPT VF software resources initialization */
>> + cptvf->cqinfo.qchunksize = CPT_CMD_QCHUNK_SIZE;
>> + err = cptvf_sw_init(cptvf, CPT_CMD_QLEN, CPT_NUM_QS_PER_VF);
>> + if (err) {
>> + dev_err(dev, "cptvf_sw_init() failed");
>> + goto cptvf_err_release_regions;
>> + }
>> + /* Convey VQ LEN to PF */
>> + err = cptvf_send_vq_size_msg(cptvf);
>> + if (err) {
>> + dev_err(dev, "PF not responding to QLEN msg");
>> + goto cptvf_err_release_regions;
>> + }
>> +
>> + /* CPT VF device initialization */
>> + cptvf_device_init(cptvf);
>> + /* Send msg to PF to assign currnet Q to required group */
>> + cptvf->vfgrp = 1;
>> + err = cptvf_send_vf_to_grp_msg(cptvf);
>> + if (err) {
>> + dev_err(dev, "PF not responding to VF_GRP msg");
>> + goto cptvf_err_release_regions;
>> + }
>> +
>> + cptvf->priority = 1;
>> + err = cptvf_send_vf_priority_msg(cptvf);
>> + if (err) {
>> + dev_err(dev, "PF not responding to VF_PRIO msg");
>> + goto cptvf_err_release_regions;
>> + }
>> + /* Register DONE interrupts */
>> + err = cptvf_register_done_intr(cptvf);
>> + if (err)
>> + goto cptvf_err_release_regions;
>> +
>> + /* Set irq affinity masks */
>> + cptvf_set_irq_affinity(cptvf);
>> + /* Convey UP to PF */
>> + err = cptvf_send_vf_up(cptvf);
>> + if (err) {
>> + dev_err(dev, "PF not responding to UP msg");
>> + goto cptvf_up_fail;
>> + }
>> + err = cvm_crypto_init(cptvf);
>> + if (err) {
>> + dev_err(dev, "Algorithm register failed\n");
>> + goto cptvf_up_fail;
>> + }
>> + return 0;
>> +
>> +cptvf_up_fail:
>> + cptvf_unregister_interrupts(cptvf);
>> +cptvf_err_release_regions:
>> + pci_release_regions(pdev);
>> +cptvf_err_disable_device:
>> + pci_disable_device(pdev);
>> + pci_set_drvdata(pdev, NULL);
>> +
>> + return err;
>> +}
>> +
>> +static void cptvf_remove(struct pci_dev *pdev)
>> +{
>> + struct cpt_vf *cptvf = pci_get_drvdata(pdev);
>> +
>> + if (!cptvf)
>> + dev_err(&pdev->dev, "Invalid CPT-VF device\n");
>> +
>> + /* Convey DOWN to PF */
>> + if (cptvf_send_vf_down(cptvf)) {
>> + dev_err(&pdev->dev, "PF not responding to DOWN msg");
>> + } else {
>> + cptvf_unregister_interrupts(cptvf);
>> + cptvf_sw_cleanup(cptvf);
>> + pci_set_drvdata(pdev, NULL);
>> + pci_release_regions(pdev);
>> + pci_disable_device(pdev);
>> + cvm_crypto_exit();
>> + }
>> +}
>> +
>> +static void cptvf_shutdown(struct pci_dev *pdev)
>> +{
>> + cptvf_remove(pdev);
>> +}
>> +
>> +/* Supported devices */
>> +static const struct pci_device_id cptvf_id_table[] = {
>> + {PCI_VDEVICE(CAVIUM, CPT_81XX_PCI_VF_DEVICE_ID), 0},
>> + { 0, } /* end of table */
>> +};
>> +
>> +static struct pci_driver cptvf_pci_driver = {
>> + .name = DRV_NAME,
>> + .id_table = cptvf_id_table,
>> + .probe = cptvf_probe,
>> + .remove = cptvf_remove,
>> + .shutdown = cptvf_shutdown,
>> +};
>> +
>> +module_pci_driver(cptvf_pci_driver);
>> +
>> +MODULE_AUTHOR("George Cherian <george.cherian@...ium.com>");
>> +MODULE_DESCRIPTION("Cavium Thunder CPT Virtual Function Driver");
>> +MODULE_LICENSE("GPL v2");
>> +MODULE_VERSION(DRV_VERSION);
>> +MODULE_DEVICE_TABLE(pci, cptvf_id_table);
>> diff --git a/drivers/crypto/cavium/cpt/cptvf_mbox.c b/drivers/crypto/cavium/cpt/cptvf_mbox.c
>> new file mode 100644
>> index 0000000..d5ec3b8
>> --- /dev/null
>> +++ b/drivers/crypto/cavium/cpt/cptvf_mbox.c
>> @@ -0,0 +1,211 @@
>> +/*
>> + * Copyright (C) 2016 Cavium, Inc.
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> + * it under the terms of version 2 of the GNU General Public License
>> + * as published by the Free Software Foundation.
>> + */
>> +
>> +#include "cptvf.h"
>> +
>> +static void cptvf_send_msg_to_pf(struct cpt_vf *cptvf, struct cpt_mbox *mbx)
>> +{
>> + /* Writing mbox(1) causes interrupt */
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VFX_PF_MBOXX(0, 0, 0),
>> + mbx->msg);
>> + cpt_write_csr64(cptvf->reg_base, CPTX_VFX_PF_MBOXX(0, 0, 1),
>> + mbx->data);
>> +}
>> +
>> +/* ACKs PF's mailbox message
>> + */
>> +void cptvf_mbox_send_ack(struct cpt_vf *cptvf, struct cpt_mbox *mbx)
>> +{
>> + mbx->msg = CPT_MBOX_MSG_TYPE_ACK;
>> + cptvf_send_msg_to_pf(cptvf, mbx);
>> +}
>> +
>> +/* NACKs PF's mailbox message that VF is not able to
>> + * complete the action
>> + */
>> +void cptvf_mbox_send_nack(struct cpt_vf *cptvf, struct cpt_mbox *mbx)
>> +{
>> + mbx->msg = CPT_MBOX_MSG_TYPE_NACK;
>> + cptvf_send_msg_to_pf(cptvf, mbx);
>> +}
>> +
>> +/* Interrupt handler to handle mailbox messages from VFs */
>> +void cptvf_handle_mbox_intr(struct cpt_vf *cptvf)
>> +{
>> + struct cpt_mbox mbx = {};
>> +
>> + /*
>> + * MBOX[0] contains msg
>> + * MBOX[1] contains data
>> + */
>> + mbx.msg = cpt_read_csr64(cptvf->reg_base, CPTX_VFX_PF_MBOXX(0, 0, 0));
>> + mbx.data = cpt_read_csr64(cptvf->reg_base, CPTX_VFX_PF_MBOXX(0, 0, 1));
>> + dev_dbg(&cptvf->pdev->dev, "%s: Mailbox msg 0x%llx from PF\n",
>> + __func__, mbx.msg);
>> + switch (mbx.msg) {
>> + case CPT_MSG_READY:
>> + {
>> + cptvf->pf_acked = true;
>> + cptvf->vfid = mbx.data;
>> + dev_dbg(&cptvf->pdev->dev, "Received VFID %d\n", cptvf->vfid);
>> + break;
>> + }
>> + case CPT_MSG_QBIND_GRP:
>> + cptvf->pf_acked = true;
>> + cptvf->vftype = mbx.data;
>> + dev_dbg(&cptvf->pdev->dev, "VF %d type %s group %d\n",
>> + cptvf->vfid, ((mbx.data == SE_TYPES) ? "SE" : "AE"),
>> + cptvf->vfgrp);
>> + break;
>> + case CPT_MBOX_MSG_TYPE_ACK:
>> + cptvf->pf_acked = true;
>> + break;
>> + case CPT_MBOX_MSG_TYPE_NACK:
>> + cptvf->pf_nacked = true;
>> + break;
>> + default:
>> + dev_err(&cptvf->pdev->dev, "Invalid msg from PF, msg 0x%llx\n",
>> + mbx.msg);
>> + break;
>> + }
>> +}
>> +
>> +static int cptvf_send_msg_to_pf_timeout(struct cpt_vf *cptvf,
>> + struct cpt_mbox *mbx)
>> +{
>> + int timeout = CPT_MBOX_MSG_TIMEOUT;
>> + int sleep = 10;
>> +
>> + cptvf->pf_acked = false;
>> + cptvf->pf_nacked = false;
>> + cptvf_send_msg_to_pf(cptvf, mbx);
>> + /* Wait for previous message to be acked, timeout 2sec */
>> + while (!cptvf->pf_acked) {
>> + if (cptvf->pf_nacked)
>> + return -EINVAL;
>> + msleep(sleep);
>> + if (cptvf->pf_acked)
>> + break;
>> + timeout -= sleep;
>> + if (!timeout) {
>> + dev_err(&cptvf->pdev->dev, "PF didn't ack to mbox msg %llx from VF%u\n",
>> + (mbx->msg & 0xFF), cptvf->vfid);
>> + return -EBUSY;
>> + }
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +/*
>> + * Checks if VF is able to comminicate with PF
>> + * and also gets the CPT number this VF is associated to.
>> + */
>> +int cptvf_check_pf_ready(struct cpt_vf *cptvf)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + struct cpt_mbox mbx = {};
>> +
>> + mbx.msg = CPT_MSG_READY;
>> + if (cptvf_send_msg_to_pf_timeout(cptvf, &mbx)) {
>> + dev_err(&pdev->dev, "PF didn't respond to READY msg\n");
>> + return -EBUSY;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +/*
>> + * Communicate VQs size to PF to program CPT(0)_PF_Q(0-15)_CTL of the VF.
>> + * Must be ACKed.
>> + */
>> +int cptvf_send_vq_size_msg(struct cpt_vf *cptvf)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + struct cpt_mbox mbx = {};
>> +
>> + mbx.msg = CPT_MSG_QLEN;
>> + mbx.data = cptvf->qsize;
>> + if (cptvf_send_msg_to_pf_timeout(cptvf, &mbx)) {
>> + dev_err(&pdev->dev, "PF didn't respond to vq_size msg\n");
>> + return -EBUSY;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +/*
>> + * Communicate VF group required to PF and get the VQ binded to that group
>> + */
>> +int cptvf_send_vf_to_grp_msg(struct cpt_vf *cptvf)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + struct cpt_mbox mbx = {};
>> +
>> + mbx.msg = CPT_MSG_QBIND_GRP;
>> + /* Convey group of the VF */
>> + mbx.data = cptvf->vfgrp;
>> + if (cptvf_send_msg_to_pf_timeout(cptvf, &mbx)) {
>> + dev_err(&pdev->dev, "PF didn't respond to vf_type msg\n");
>> + return -EBUSY;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +/*
>> + * Communicate VF group required to PF and get the VQ binded to that group
>> + */
>> +int cptvf_send_vf_priority_msg(struct cpt_vf *cptvf)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + struct cpt_mbox mbx = {};
>> +
>> + mbx.msg = CPT_MSG_VQ_PRIORITY;
>> + /* Convey group of the VF */
>> + mbx.data = cptvf->priority;
>> + if (cptvf_send_msg_to_pf_timeout(cptvf, &mbx)) {
>> + dev_err(&pdev->dev, "PF didn't respond to vf_type msg\n");
>> + return -EBUSY;
>> + }
>> + return 0;
>> +}
>> +
>> +/*
>> + * Communicate to PF that VF is UP and running
>> + */
>> +int cptvf_send_vf_up(struct cpt_vf *cptvf)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + struct cpt_mbox mbx = {};
>> +
>> + mbx.msg = CPT_MSG_VF_UP;
>> + if (cptvf_send_msg_to_pf_timeout(cptvf, &mbx)) {
>> + dev_err(&pdev->dev, "PF didn't respond to UP msg\n");
>> + return -EBUSY;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +/*
>> + * Communicate to PF that VF is DOWN and running
>> + */
>> +int cptvf_send_vf_down(struct cpt_vf *cptvf)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + struct cpt_mbox mbx = {};
>> +
>> + mbx.msg = CPT_MSG_VF_DOWN;
>> + if (cptvf_send_msg_to_pf_timeout(cptvf, &mbx)) {
>> + dev_err(&pdev->dev, "PF didn't respond to DOWN msg\n");
>> + return -EBUSY;
>> + }
>> +
>> + return 0;
>> +}
>> diff --git a/drivers/crypto/cavium/cpt/cptvf_reqmanager.c b/drivers/crypto/cavium/cpt/cptvf_reqmanager.c
>> new file mode 100644
>> index 0000000..062b8e9
>> --- /dev/null
>> +++ b/drivers/crypto/cavium/cpt/cptvf_reqmanager.c
>> @@ -0,0 +1,593 @@
>> +/*
>> + * Copyright (C) 2016 Cavium, Inc.
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> + * it under the terms of version 2 of the GNU General Public License
>> + * as published by the Free Software Foundation.
>> + */
>> +
>> +#include "cptvf.h"
>> +#include "request_manager.h"
>> +
>> +/**
>> + * get_free_pending_entry - get free entry from pending queue
>> + * @param pqinfo: pending_qinfo structure
>> + * @param qno: queue number
>> + */
>> +static struct pending_entry *get_free_pending_entry(struct pending_queue *q,
>> + int qlen)
>> +{
>> + struct pending_entry *ent = NULL;
>> +
>> + ent = &q->head[q->rear];
>> + if (unlikely(ent->busy)) {
>> + ent = NULL;
>> + goto no_free_entry;
>> + }
>> +
>> + q->rear++;
>> + if (unlikely(q->rear == qlen))
>> + q->rear = 0;
>> +
>> +no_free_entry:
>> + return ent;
>> +}
>> +
>> +static inline void pending_queue_inc_front(struct pending_qinfo *pqinfo,
>> + int qno)
>> +{
>> + struct pending_queue *queue = &pqinfo->queue[qno];
>> +
>> + queue->front++;
>> + if (unlikely(queue->front == pqinfo->qlen))
>> + queue->front = 0;
>> +}
>> +
>> +static int setup_sgio_components(struct cpt_vf *cptvf, struct buf_ptr *list,
>> + int buf_count, u8 *buffer)
>> +{
>> + int ret = 0, i, j;
>> + int components;
>> + struct sglist_component *sg_ptr = NULL;
>> + struct pci_dev *pdev = cptvf->pdev;
>> +
>> + if (unlikely(!list)) {
>> + dev_err(&pdev->dev, "Input List pointer is NULL\n");
>> + return -EFAULT;
>> + }
>> +
>> + for (i = 0; i < buf_count; i++) {
>> + if (likely(list[i].vptr)) {
>> + list[i].dma_addr = dma_map_single(&pdev->dev,
>> + list[i].vptr,
>> + list[i].size,
>> + DMA_BIDIRECTIONAL);
>> + if (unlikely(dma_mapping_error(&pdev->dev,
>> + list[i].dma_addr))) {
>> + dev_err(&pdev->dev, "DMA map kernel buffer failed for component: %d\n",
>> + i);
>> + ret = -EIO;
>> + goto sg_cleanup;
>> + }
>> + }
>> + }
>> +
>> + components = buf_count / 4;
>> + sg_ptr = (struct sglist_component *)buffer;
>> + for (i = 0; i < components; i++) {
>> + sg_ptr->u.s.len0 = cpu_to_be16(list[i * 4 + 0].size);
>> + sg_ptr->u.s.len1 = cpu_to_be16(list[i * 4 + 1].size);
>> + sg_ptr->u.s.len2 = cpu_to_be16(list[i * 4 + 2].size);
>> + sg_ptr->u.s.len3 = cpu_to_be16(list[i * 4 + 3].size);
>> + sg_ptr->ptr0 = cpu_to_be64(list[i * 4 + 0].dma_addr);
>> + sg_ptr->ptr1 = cpu_to_be64(list[i * 4 + 1].dma_addr);
>> + sg_ptr->ptr2 = cpu_to_be64(list[i * 4 + 2].dma_addr);
>> + sg_ptr->ptr3 = cpu_to_be64(list[i * 4 + 3].dma_addr);
>> + sg_ptr++;
>> + }
>> +
>> + components = buf_count % 4;
>> +
>> + switch (components) {
>> + case 3:
>> + sg_ptr->u.s.len2 = cpu_to_be16(list[i * 4 + 2].size);
>> + sg_ptr->ptr2 = cpu_to_be64(list[i * 4 + 2].dma_addr);
>> + /* Fall through */
>> + case 2:
>> + sg_ptr->u.s.len1 = cpu_to_be16(list[i * 4 + 1].size);
>> + sg_ptr->ptr1 = cpu_to_be64(list[i * 4 + 1].dma_addr);
>> + /* Fall through */
>> + case 1:
>> + sg_ptr->u.s.len0 = cpu_to_be16(list[i * 4 + 0].size);
>> + sg_ptr->ptr0 = cpu_to_be64(list[i * 4 + 0].dma_addr);
>> + break;
>> + default:
>> + break;
>> + }
>> +
>> + return ret;
>> +
>> +sg_cleanup:
>> + for (j = 0; j < i; j++) {
>> + if (list[j].dma_addr) {
>> + dma_unmap_single(&pdev->dev, list[i].dma_addr,
>> + list[i].size, DMA_BIDIRECTIONAL);
>> + }
>> +
>> + list[j].dma_addr = 0;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static inline int setup_sgio_list(struct cpt_vf *cptvf,
>> + struct cpt_info_buffer *info,
>> + struct cpt_request_info *req)
>> +{
>> + u16 g_sz_bytes = 0, s_sz_bytes = 0;
>> + int ret = 0;
>> + struct pci_dev *pdev = cptvf->pdev;
>> +
>> + if (req->incnt > MAX_SG_IN_CNT || req->outcnt > MAX_SG_OUT_CNT) {
>> + dev_err(&pdev->dev, "Request SG components are higher than supported\n");
>> + ret = -EINVAL;
>> + goto scatter_gather_clean;
>> + }
>> +
>> + /* Setup gather (input) components */
>> + g_sz_bytes = ((req->incnt + 3) / 4) * sizeof(struct sglist_component);
>> + info->gather_components = kzalloc(g_sz_bytes, GFP_KERNEL);
>> + if (!info->gather_components) {
>> + ret = -ENOMEM;
>> + goto scatter_gather_clean;
>> + }
>> +
>> + ret = setup_sgio_components(cptvf, req->in,
>> + req->incnt,
>> + info->gather_components);
>> + if (ret) {
>> + dev_err(&pdev->dev, "Failed to setup gather list\n");
>> + ret = -EFAULT;
>> + goto scatter_gather_clean;
>> + }
>> +
>> + /* Setup scatter (output) components */
>> + s_sz_bytes = ((req->outcnt + 3) / 4) * sizeof(struct sglist_component);
>> + info->scatter_components = kzalloc(s_sz_bytes, GFP_KERNEL);
>> + if (!info->scatter_components) {
>> + ret = -ENOMEM;
>> + goto scatter_gather_clean;
>> + }
>> +
>> + ret = setup_sgio_components(cptvf, req->out,
>> + req->outcnt,
>> + info->scatter_components);
>> + if (ret) {
>> + dev_err(&pdev->dev, "Failed to setup gather list\n");
>> + ret = -EFAULT;
>> + goto scatter_gather_clean;
>> + }
>> +
>> + /* Create and initialize DPTR */
>> + info->dlen = g_sz_bytes + s_sz_bytes + SG_LIST_HDR_SIZE;
>> + info->in_buffer = kzalloc(info->dlen, GFP_KERNEL);
>> + if (!info->in_buffer) {
>> + ret = -ENOMEM;
>> + goto scatter_gather_clean;
>> + }
>> +
>> + ((u16 *)info->in_buffer)[0] = req->outcnt;
>> + ((u16 *)info->in_buffer)[1] = req->incnt;
>> + ((u16 *)info->in_buffer)[2] = 0;
>> + ((u16 *)info->in_buffer)[3] = 0;
>> + *(u64 *)info->in_buffer = cpu_to_be64p((u64 *)info->in_buffer);
>> +
>> + memcpy(&info->in_buffer[8], info->gather_components,
>> + g_sz_bytes);
>> + memcpy(&info->in_buffer[8 + g_sz_bytes],
>> + info->scatter_components, s_sz_bytes);
>> +
>> + info->dptr_baddr = dma_map_single(&pdev->dev,
>> + (void *)info->in_buffer,
>> + info->dlen,
>> + DMA_BIDIRECTIONAL);
>> + if (dma_mapping_error(&pdev->dev, info->dptr_baddr)) {
>> + dev_err(&pdev->dev, "Mapping DPTR Failed %d\n", info->dlen);
>> + ret = -EIO;
>> + goto scatter_gather_clean;
>> + }
>> +
>> + /* Create and initialize RPTR */
>> + info->out_buffer = kzalloc(COMPLETION_CODE_SIZE, GFP_KERNEL);
>> + if (!info->out_buffer) {
>> + ret = -ENOMEM;
>> + goto scatter_gather_clean;
>> + }
>> +
>> + *((u64 *)info->out_buffer) = ~((u64)COMPLETION_CODE_INIT);
>> + info->alternate_caddr = (u64 *)info->out_buffer;
>> + info->rptr_baddr = dma_map_single(&pdev->dev,
>> + (void *)info->out_buffer,
>> + COMPLETION_CODE_SIZE,
>> + DMA_BIDIRECTIONAL);
>> + if (dma_mapping_error(&pdev->dev, info->rptr_baddr)) {
>> + dev_err(&pdev->dev, "Mapping RPTR Failed %d\n",
>> + COMPLETION_CODE_SIZE);
>> + ret = -EIO;
>> + goto scatter_gather_clean;
>> + }
>> +
>> + return 0;
>> +
>> +scatter_gather_clean:
>> + return ret;
>> +}
>> +
>> +int send_cpt_command(struct cpt_vf *cptvf, union cpt_inst_s *cmd,
>> + u32 qno)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + struct command_qinfo *qinfo = NULL;
>> + struct command_queue *queue;
>> + struct command_chunk *chunk;
>> + u8 *ent;
>> + int ret = 0;
>> +
>> + if (unlikely(qno >= cptvf->nr_queues)) {
>> + dev_err(&pdev->dev, "Invalid queue (qno: %d, nr_queues: %d)\n",
>> + qno, cptvf->nr_queues);
>> + return -EINVAL;
>> + }
>> +
>> + qinfo = &cptvf->cqinfo;
>> + queue = &qinfo->queue[qno];
>> + /* lock commad queue */
>> + spin_lock(&queue->lock);
>> + ent = &queue->qhead->head[queue->idx * qinfo->cmd_size];
>> + memcpy(ent, (void *)cmd, qinfo->cmd_size);
>> +
>> + if (++queue->idx >= queue->qhead->size / 64) {
>> + struct hlist_node *node;
>> +
>> + hlist_for_each(node, &queue->chead) {
>> + chunk = hlist_entry(node, struct command_chunk,
>> + nextchunk);
>> + if (chunk == queue->qhead) {
>> + continue;
>> + } else {
>> + queue->qhead = chunk;
>> + break;
>> + }
>> + }
>> + queue->idx = 0;
>> + }
>> + /* make sure all memory stores are done before ringing doorbell */
>> + smp_wmb();
>> + cptvf_write_vq_doorbell(cptvf, 1);
>> + /* unlock command queue */
>> + spin_unlock(&queue->lock);
>> +
>> + return ret;
>> +}
>> +
>> +void do_request_cleanup(struct cpt_vf *cptvf,
>> + struct cpt_info_buffer *info)
>> +{
>> + int i;
>> + struct pci_dev *pdev = cptvf->pdev;
>> + struct cpt_request_info *req;
>> +
>> + if (info->dptr_baddr)
>> + dma_unmap_single(&pdev->dev, info->dptr_baddr,
>> + info->dlen, DMA_BIDIRECTIONAL);
>> +
>> + if (info->rptr_baddr)
>> + dma_unmap_single(&pdev->dev, info->rptr_baddr,
>> + COMPLETION_CODE_SIZE, DMA_BIDIRECTIONAL);
>> +
>> + if (info->comp_baddr)
>> + dma_unmap_single(&pdev->dev, info->comp_baddr,
>> + sizeof(union cpt_res_s), DMA_BIDIRECTIONAL);
>> +
>> + if (info->req) {
>> + req = info->req;
>> + for (i = 0; i < req->outcnt; i++) {
>> + if (req->out[i].dma_addr)
>> + dma_unmap_single(&pdev->dev,
>> + req->out[i].dma_addr,
>> + req->out[i].size,
>> + DMA_BIDIRECTIONAL);
>> + }
>> +
>> + for (i = 0; i < req->incnt; i++) {
>> + if (req->in[i].dma_addr)
>> + dma_unmap_single(&pdev->dev,
>> + req->in[i].dma_addr,
>> + req->in[i].size,
>> + DMA_BIDIRECTIONAL);
>> + }
>> + }
>> +
>> + if (info->scatter_components)
>> + kzfree(info->scatter_components);
>> +
>> + if (info->gather_components)
>> + kzfree(info->gather_components);
>> +
>> + if (info->out_buffer)
>> + kzfree(info->out_buffer);
>> +
>> + if (info->in_buffer)
>> + kzfree(info->in_buffer);
>> +
>> + if (info->completion_addr)
>> + kzfree((void *)info->completion_addr);
>> +
>> + kzfree(info);
>> +}
>> +
>> +void do_post_process(struct cpt_vf *cptvf, struct cpt_info_buffer *info)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> +
>> + if (!info || !cptvf) {
>> + dev_err(&pdev->dev, "Input params are incorrect for post processing\n");
>> + return;
>> + }
>> +
>> + do_request_cleanup(cptvf, info);
>> +}
>> +
>> +static inline void process_pending_queue(struct cpt_vf *cptvf,
>> + struct pending_qinfo *pqinfo,
>> + int qno)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> + struct pending_queue *pqueue = &pqinfo->queue[qno];
>> + struct pending_entry *pentry = NULL;
>> + struct cpt_info_buffer *info = NULL;
>> + union cpt_res_s *status = NULL;
>> + unsigned char ccode;
>> +
>> + while (1) {
>> + spin_lock_bh(&pqueue->lock);
>> + pentry = &pqueue->head[pqueue->front];
>> + if (unlikely(!pentry->busy)) {
>> + spin_unlock_bh(&pqueue->lock);
>> + break;
>> + }
>> +
>> + info = (struct cpt_info_buffer *)pentry->post_arg;
>> + if (unlikely(!info)) {
>> + dev_err(&pdev->dev, "Pending Entry post arg NULL\n");
>> + pending_queue_inc_front(pqinfo, qno);
>> + spin_unlock_bh(&pqueue->lock);
>> + continue;
>> + }
>> +
>> + status = (union cpt_res_s *)pentry->completion_addr;
>> + ccode = status->s.compcode;
>> + if ((status->s.compcode == CPT_COMP_E_FAULT) ||
>> + (status->s.compcode == CPT_COMP_E_SWERR)) {
>> + dev_err(&pdev->dev, "Request failed with %s\n",
>> + (status->s.compcode == CPT_COMP_E_FAULT) ?
>> + "DMA Fault" : "Software error");
>> + pentry->completion_addr = NULL;
>> + pentry->busy = false;
>> + atomic64_dec((&pqueue->pending_count));
>> + pentry->post_arg = NULL;
>> + pending_queue_inc_front(pqinfo, qno);
>> + do_request_cleanup(cptvf, info);
>> + spin_unlock_bh(&pqueue->lock);
>> + break;
>> + } else if (status->s.compcode == COMPLETION_CODE_INIT) {
>> + /* check for timeout */
>> + if (time_after_eq(jiffies,
>> + (info->time_in +
>> + (CPT_COMMAND_TIMEOUT * HZ)))) {
>> + dev_err(&pdev->dev, "Request timed out");
>> + pentry->completion_addr = NULL;
>> + pentry->busy = false;
>> + atomic64_dec((&pqueue->pending_count));
>> + pentry->post_arg = NULL;
>> + pending_queue_inc_front(pqinfo, qno);
>> + do_request_cleanup(cptvf, info);
>> + spin_unlock_bh(&pqueue->lock);
>> + break;
>> + } else if ((*info->alternate_caddr ==
>> + (~COMPLETION_CODE_INIT)) &&
>> + (info->extra_time < TIME_IN_RESET_COUNT)) {
>> + info->time_in = jiffies;
>> + info->extra_time++;
>> + spin_unlock_bh(&pqueue->lock);
>> + break;
>> + }
>> + }
>> +
>> + pentry->completion_addr = NULL;
>> + pentry->busy = false;
>> + pentry->post_arg = NULL;
>> + atomic64_dec((&pqueue->pending_count));
>> + pending_queue_inc_front(pqinfo, qno);
>> + spin_unlock_bh(&pqueue->lock);
>> +
>> + do_post_process(info->cptvf, info);
>> + /*
>> + * Calling callback after we find
>> + * that the request has been serviced
>> + */
>> + pentry->callback(ccode, pentry->callback_arg);
>> + }
>> +}
>> +
>> +int process_request(struct cpt_vf *cptvf, struct cpt_request_info *req)
>> +{
>> + int ret = 0, clear = 0, queue = 0;
>> + struct cpt_info_buffer *info = NULL;
>> + struct cptvf_request *cpt_req = NULL;
>> + union ctrl_info *ctrl = NULL;
>> + struct pending_entry *pentry = NULL;
>> + struct pending_queue *pqueue = NULL;
>> + struct pci_dev *pdev = cptvf->pdev;
>> + u8 group = 0;
>> + struct cpt_vq_command vq_cmd;
>> + union cpt_inst_s cptinst;
>> +
>> + if (unlikely(!cptvf || !req)) {
> You already dereferenced cptvf above.
thanks for pointing it out.
>> + dev_err(&pdev->dev, "Invalid inputs (cptvf: %p, req: %p)\n",
>> + cptvf, req);
>> + return -EINVAL;
>> + }
>> +
>> + info = kzalloc(sizeof(*info), GFP_KERNEL | GFP_ATOMIC);
> What do you expect to happen with GFP_KERNEL | GFP_ATOMIC?
>
>> + if (unlikely(!info)) {
>> + dev_err(&pdev->dev, "Unable to allocate memory for info_buffer\n");
>> + return -ENOMEM;
>> + }
>> +
>> + cpt_req = (struct cptvf_request *)&req->req;
>> + ctrl = (union ctrl_info *)&req->ctrl;
>> +
>> + info->cptvf = cptvf;
>> + group = ctrl->s.grp;
>> + ret = setup_sgio_list(cptvf, info, req);
>> + if (ret) {
>> + dev_err(&pdev->dev, "Setting up SG list failed");
>> + goto request_cleanup;
>> + }
>> +
>> + cpt_req->dlen = info->dlen;
>> + /*
>> + * Get buffer for union cpt_res_s response
>> + * structure and its physical address
>> + */
>> + info->completion_addr = kzalloc(sizeof(union cpt_res_s),
>> + GFP_KERNEL | GFP_ATOMIC);
> Same as above, you also never checked if it had failed.
>
>> + *((u8 *)(info->completion_addr)) = COMPLETION_CODE_INIT;
> Supposedly info->completion_addr is a "union cpt_res_s", why do you
> cast it to u8 ptr?
okay will change it.
>> + info->comp_baddr = dma_map_single(&pdev->dev,
>> + (void *)info->completion_addr,
>> + sizeof(union cpt_res_s),
>> + DMA_BIDIRECTIONAL);
>> + if (dma_mapping_error(&pdev->dev, info->comp_baddr)) {
>> + dev_err(&pdev->dev, "mapping compptr Failed %lu\n",
>> + sizeof(union cpt_res_s));
>> + ret = -EFAULT;
>> + goto request_cleanup;
>> + }
>> +
>> + /* Fill the VQ command */
>> + vq_cmd.cmd.u64 = 0;
>> + vq_cmd.cmd.s.opcode = cpu_to_be16(cpt_req->opcode.flags);
>> + vq_cmd.cmd.s.param1 = cpu_to_be16(cpt_req->param1);
>> + vq_cmd.cmd.s.param2 = cpu_to_be16(cpt_req->param2);
>> + vq_cmd.cmd.s.dlen = cpu_to_be16(cpt_req->dlen);
>> +
>> + /* 64-bit swap for microcode data reads, not needed for addresses*/
>> + vq_cmd.cmd.u64 = cpu_to_be64(vq_cmd.cmd.u64);
>> + vq_cmd.dptr = info->dptr_baddr;
>> + vq_cmd.rptr = info->rptr_baddr;
>> + vq_cmd.cptr.u64 = 0;
>> + vq_cmd.cptr.s.grp = group;
>> + /* Get Pending Entry to submit command */
>> + /* Always queue 0, because 1 queue per VF */
>> + queue = 0;
>> + pqueue = &cptvf->pqinfo.queue[queue];
>> +
>> + if (atomic64_read(&pqueue->pending_count) > PENDING_THOLD) {
>> + dev_err(&pdev->dev, "pending threshold reached\n");
>> + process_pending_queue(cptvf, &cptvf->pqinfo, queue);
>> + }
>> +
>> +get_pending_entry:
>> + spin_lock_bh(&pqueue->lock);
>> + pentry = get_free_pending_entry(pqueue, cptvf->pqinfo.qlen);
>> + if (unlikely(!pentry)) {
>> + spin_unlock_bh(&pqueue->lock);
>> + if (clear == 0) {
>> + process_pending_queue(cptvf, &cptvf->pqinfo, queue);
>> + clear = 1;
>> + goto get_pending_entry;
>> + }
>> + dev_err(&pdev->dev, "Get free entry failed\n");
>> + dev_err(&pdev->dev, "queue: %d, rear: %d, front: %d\n",
>> + queue, pqueue->rear, pqueue->front);
>> + ret = -EFAULT;
>> + goto request_cleanup;
>> + }
>> +
>> + pentry->completion_addr = info->completion_addr;
>> + pentry->post_arg = (void *)info;
>> + pentry->callback = req->callback;
>> + pentry->callback_arg = req->callback_arg;
>> + info->pentry = pentry;
>> + pentry->busy = true;
>> + atomic64_inc(&pqueue->pending_count);
>> +
>> + /* Send CPT command */
>> + info->pentry = pentry;
>> + info->time_in = jiffies;
>> + info->req = req;
>> +
>> + /* Create the CPT_INST_S type command for HW intrepretation */
>> + cptinst.s.doneint = true;
>> + cptinst.s.res_addr = (u64)info->comp_baddr;
>> + cptinst.s.tag = 0;
>> + cptinst.s.grp = 0;
>> + cptinst.s.wq_ptr = 0;
>> + cptinst.s.ei0 = vq_cmd.cmd.u64;
>> + cptinst.s.ei1 = vq_cmd.dptr;
>> + cptinst.s.ei2 = vq_cmd.rptr;
>> + cptinst.s.ei3 = vq_cmd.cptr.u64;
>> +
>> + ret = send_cpt_command(cptvf, &cptinst, queue);
>> + spin_unlock_bh(&pqueue->lock);
>> + if (unlikely(ret)) {
>> + dev_err(&pdev->dev, "Send command failed for AE\n");
>> + ret = -EFAULT;
>> + goto request_cleanup;
>> + }
>> +
>> + return 0;
>> +
>> +request_cleanup:
>> + dev_dbg(&pdev->dev, "Failed to submit CPT command\n");
>> + do_request_cleanup(cptvf, info);
>> +
>> + return ret;
>> +}
>> +
>> +void vq_post_process(struct cpt_vf *cptvf, u32 qno)
>> +{
>> + struct pci_dev *pdev = cptvf->pdev;
>> +
>> + if (unlikely(qno > cptvf->nr_queues)) {
>> + dev_err(&pdev->dev, "Request for post processing on invalid pending queue: %u\n",
>> + qno);
>> + return;
>> + }
>> +
>> + process_pending_queue(cptvf, &cptvf->pqinfo, qno);
>> +}
>> +
>> +int cptvf_do_request(void *vfdev, struct cpt_request_info *req)
>> +{
>> + struct cpt_vf *cptvf = (struct cpt_vf *)vfdev;
>> + struct pci_dev *pdev = cptvf->pdev;
>> +
>> + if (!cpt_device_ready(cptvf)) {
>> + dev_err(&pdev->dev, "CPT Device is not ready");
>> + return -ENODEV;
>> + }
>> +
>> + if ((cptvf->vftype == SE_TYPES) && (!req->ctrl.s.se_req)) {
>> + dev_err(&pdev->dev, "CPTVF-%d of SE TYPE got AE request",
>> + cptvf->vfid);
>> + return -EINVAL;
>> + } else if ((cptvf->vftype == AE_TYPES) && (req->ctrl.s.se_req)) {
>> + dev_err(&pdev->dev, "CPTVF-%d of AE TYPE got SE request",
>> + cptvf->vfid);
>> + return -EINVAL;
>> + }
>> +
>> + return process_request(cptvf, req);
>> +}
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