crypto: octeontx2 - add support for AF to CPT PF uplink mbox

This patch adds support for AF -> CPT PF uplink mailbox messages
and adds a mailbox handler to submit a CPT instruction from AF as
current architecture doesn't allow AF to submit CPT instruction
directly to HW.

Signed-off-by: Srujana Challa <schalla@marvell.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/marvell/octeontx2/otx2_cptpf.h b/drivers/crypto/marvell/octeontx2/otx2_cptpf.h
index 936174b..67ea070 100644 (file)
--- a/drivers/crypto/marvell/octeontx2/otx2_cptpf.h
+++ b/drivers/crypto/marvell/octeontx2/otx2_cptpf.h
@@ -40,6 +40,9 @@ struct otx2_cptpf_dev {
        struct work_struct      afpf_mbox_work;
        struct workqueue_struct *afpf_mbox_wq;
 
+       struct otx2_mbox        afpf_mbox_up;
+       struct work_struct      afpf_mbox_up_work;
+
        /* VF <=> PF mbox */
        struct otx2_mbox        vfpf_mbox;
        struct workqueue_struct *vfpf_mbox_wq;
@@ -61,6 +64,7 @@ struct otx2_cptpf_dev {
 
 irqreturn_t otx2_cptpf_afpf_mbox_intr(int irq, void *arg);
 void otx2_cptpf_afpf_mbox_handler(struct work_struct *work);
+void otx2_cptpf_afpf_mbox_up_handler(struct work_struct *work);
 irqreturn_t otx2_cptpf_vfpf_mbox_intr(int irq, void *arg);
 void otx2_cptpf_vfpf_mbox_handler(struct work_struct *work);
 

diff --git a/drivers/crypto/marvell/octeontx2/otx2_cptpf_main.c b/drivers/crypto/marvell/octeontx2/otx2_cptpf_main.c
index ddf6e91..612a764 100644 (file)
--- a/drivers/crypto/marvell/octeontx2/otx2_cptpf_main.c
+++ b/drivers/crypto/marvell/octeontx2/otx2_cptpf_main.c
@@ -473,10 +473,19 @@ static int cptpf_afpf_mbox_init(struct otx2_cptpf_dev *cptpf)
        if (err)
                goto error;
 
+       err = otx2_mbox_init(&cptpf->afpf_mbox_up, cptpf->afpf_mbox_base,
+                            pdev, cptpf->reg_base, MBOX_DIR_PFAF_UP, 1);
+       if (err)
+               goto mbox_cleanup;
+
        INIT_WORK(&cptpf->afpf_mbox_work, otx2_cptpf_afpf_mbox_handler);
+       INIT_WORK(&cptpf->afpf_mbox_up_work, otx2_cptpf_afpf_mbox_up_handler);
        mutex_init(&cptpf->lock);
+
        return 0;
 
+mbox_cleanup:
+       otx2_mbox_destroy(&cptpf->afpf_mbox);
 error:
        destroy_workqueue(cptpf->afpf_mbox_wq);
        return err;
@@ -486,6 +495,7 @@ static void cptpf_afpf_mbox_destroy(struct otx2_cptpf_dev *cptpf)
 {
        destroy_workqueue(cptpf->afpf_mbox_wq);
        otx2_mbox_destroy(&cptpf->afpf_mbox);
+       otx2_mbox_destroy(&cptpf->afpf_mbox_up);
 }
 
 static ssize_t kvf_limits_show(struct device *dev,

diff --git a/drivers/crypto/marvell/octeontx2/otx2_cptpf_mbox.c b/drivers/crypto/marvell/octeontx2/otx2_cptpf_mbox.c
index dee0aa6..d2216d1 100644 (file)
--- a/drivers/crypto/marvell/octeontx2/otx2_cptpf_mbox.c
+++ b/drivers/crypto/marvell/octeontx2/otx2_cptpf_mbox.c
@@ -224,14 +224,28 @@ void otx2_cptpf_vfpf_mbox_handler(struct work_struct *work)
 irqreturn_t otx2_cptpf_afpf_mbox_intr(int __always_unused irq, void *arg)
 {
        struct otx2_cptpf_dev *cptpf = arg;
+       struct otx2_mbox_dev *mdev;
+       struct otx2_mbox *mbox;
+       struct mbox_hdr *hdr;
        u64 intr;
 
        /* Read the interrupt bits */
        intr = otx2_cpt_read64(cptpf->reg_base, BLKADDR_RVUM, 0, RVU_PF_INT);
 
        if (intr & 0x1ULL) {
-               /* Schedule work queue function to process the MBOX request */
-               queue_work(cptpf->afpf_mbox_wq, &cptpf->afpf_mbox_work);
+               mbox = &cptpf->afpf_mbox;
+               mdev = &mbox->dev[0];
+               hdr = mdev->mbase + mbox->rx_start;
+               if (hdr->num_msgs)
+                       /* Schedule work queue function to process the MBOX request */
+                       queue_work(cptpf->afpf_mbox_wq, &cptpf->afpf_mbox_work);
+
+               mbox = &cptpf->afpf_mbox_up;
+               mdev = &mbox->dev[0];
+               hdr = mdev->mbase + mbox->rx_start;
+               if (hdr->num_msgs)
+                       /* Schedule work queue function to process the MBOX request */
+                       queue_work(cptpf->afpf_mbox_wq, &cptpf->afpf_mbox_up_work);
                /* Clear and ack the interrupt */
                otx2_cpt_write64(cptpf->reg_base, BLKADDR_RVUM, 0, RVU_PF_INT,
                                 0x1ULL);
@@ -367,3 +381,71 @@ void otx2_cptpf_afpf_mbox_handler(struct work_struct *work)
        }
        otx2_mbox_reset(afpf_mbox, 0);
 }
+
+static void handle_msg_cpt_inst_lmtst(struct otx2_cptpf_dev *cptpf,
+                                     struct mbox_msghdr *msg)
+{
+       struct cpt_inst_lmtst_req *req = (struct cpt_inst_lmtst_req *)msg;
+       struct otx2_cptlfs_info *lfs = &cptpf->lfs;
+       struct msg_rsp *rsp;
+
+       if (cptpf->lfs.lfs_num)
+               lfs->ops->send_cmd((union otx2_cpt_inst_s *)req->inst, 1,
+                                  &lfs->lf[0]);
+
+       rsp = (struct msg_rsp *)otx2_mbox_alloc_msg(&cptpf->afpf_mbox_up, 0,
+                                                   sizeof(*rsp));
+       if (!rsp)
+               return;
+
+       rsp->hdr.id = msg->id;
+       rsp->hdr.sig = OTX2_MBOX_RSP_SIG;
+       rsp->hdr.pcifunc = 0;
+       rsp->hdr.rc = 0;
+}
+
+static void process_afpf_mbox_up_msg(struct otx2_cptpf_dev *cptpf,
+                                    struct mbox_msghdr *msg)
+{
+       if (msg->id >= MBOX_MSG_MAX) {
+               dev_err(&cptpf->pdev->dev,
+                       "MBOX msg with unknown ID %d\n", msg->id);
+               return;
+       }
+
+       switch (msg->id) {
+       case MBOX_MSG_CPT_INST_LMTST:
+               handle_msg_cpt_inst_lmtst(cptpf, msg);
+               break;
+       default:
+               otx2_reply_invalid_msg(&cptpf->afpf_mbox_up, 0, 0, msg->id);
+       }
+}
+
+void otx2_cptpf_afpf_mbox_up_handler(struct work_struct *work)
+{
+       struct otx2_cptpf_dev *cptpf;
+       struct otx2_mbox_dev *mdev;
+       struct mbox_hdr *rsp_hdr;
+       struct mbox_msghdr *msg;
+       struct otx2_mbox *mbox;
+       int offset, i;
+
+       cptpf = container_of(work, struct otx2_cptpf_dev, afpf_mbox_up_work);
+       mbox = &cptpf->afpf_mbox_up;
+       mdev = &mbox->dev[0];
+       /* Sync mbox data into memory */
+       smp_wmb();
+
+       rsp_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start);
+       offset = mbox->rx_start + ALIGN(sizeof(*rsp_hdr), MBOX_MSG_ALIGN);
+
+       for (i = 0; i < rsp_hdr->num_msgs; i++) {
+               msg = (struct mbox_msghdr *)(mdev->mbase + offset);
+
+               process_afpf_mbox_up_msg(cptpf, msg);
+
+               offset = mbox->rx_start + msg->next_msgoff;
+       }
+       otx2_mbox_msg_send(mbox, 0);
+}