1 files changed, 437 insertions, 0 deletions
diff --git a/drivers/crypto/marvell/octeontx2/otx2_cptvf_main.c b/drivers/crypto/marvell/octeontx2/otx2_cptvf_main.c
new file mode 100644
index 000000000..392e9fee0
--- /dev/null
+++ b/drivers/crypto/marvell/octeontx2/otx2_cptvf_main.c
@@ -0,0 +1,437 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (C) 2020 Marvell. */
+
+#include "otx2_cpt_common.h"
+#include "otx2_cptvf.h"
+#include "otx2_cptlf.h"
+#include "otx2_cptvf_algs.h"
+#include "cn10k_cpt.h"
+#include <rvu_reg.h>
+
+#define OTX2_CPTVF_DRV_NAME "rvu_cptvf"
+
+static void cptvf_enable_pfvf_mbox_intrs(struct otx2_cptvf_dev *cptvf)
+{
+	/* Clear interrupt if any */
+	otx2_cpt_write64(cptvf->reg_base, BLKADDR_RVUM, 0, OTX2_RVU_VF_INT,
+			 0x1ULL);
+
+	/* Enable PF-VF interrupt */
+	otx2_cpt_write64(cptvf->reg_base, BLKADDR_RVUM, 0,
+			 OTX2_RVU_VF_INT_ENA_W1S, 0x1ULL);
+}
+
+static void cptvf_disable_pfvf_mbox_intrs(struct otx2_cptvf_dev *cptvf)
+{
+	/* Disable PF-VF interrupt */
+	otx2_cpt_write64(cptvf->reg_base, BLKADDR_RVUM, 0,
+			 OTX2_RVU_VF_INT_ENA_W1C, 0x1ULL);
+
+	/* Clear interrupt if any */
+	otx2_cpt_write64(cptvf->reg_base, BLKADDR_RVUM, 0, OTX2_RVU_VF_INT,
+			 0x1ULL);
+}
+
+static int cptvf_register_interrupts(struct otx2_cptvf_dev *cptvf)
+{
+	int ret, irq;
+	int num_vec;
+
+	num_vec = pci_msix_vec_count(cptvf->pdev);
+	if (num_vec <= 0)
+		return -EINVAL;
+
+	/* Enable MSI-X */
+	ret = pci_alloc_irq_vectors(cptvf->pdev, num_vec, num_vec,
+				    PCI_IRQ_MSIX);
+	if (ret < 0) {
+		dev_err(&cptvf->pdev->dev,
+			"Request for %d msix vectors failed\n", num_vec);
+		return ret;
+	}
+	irq = pci_irq_vector(cptvf->pdev, OTX2_CPT_VF_INT_VEC_E_MBOX);
+	/* Register VF<=>PF mailbox interrupt handler */
+	ret = devm_request_irq(&cptvf->pdev->dev, irq,
+			       otx2_cptvf_pfvf_mbox_intr, 0,
+			       "CPTPFVF Mbox", cptvf);
+	if (ret)
+		return ret;
+	/* Enable PF-VF mailbox interrupts */
+	cptvf_enable_pfvf_mbox_intrs(cptvf);
+
+	ret = otx2_cpt_send_ready_msg(&cptvf->pfvf_mbox, cptvf->pdev);
+	if (ret) {
+		dev_warn(&cptvf->pdev->dev,
+			 "PF not responding to mailbox, deferring probe\n");
+		cptvf_disable_pfvf_mbox_intrs(cptvf);
+		return -EPROBE_DEFER;
+	}
+	return 0;
+}
+
+static int cptvf_pfvf_mbox_init(struct otx2_cptvf_dev *cptvf)
+{
+	struct pci_dev *pdev = cptvf->pdev;
+	resource_size_t offset, size;
+	int ret;
+
+	cptvf->pfvf_mbox_wq = alloc_workqueue("cpt_pfvf_mailbox",
+					      WQ_UNBOUND | WQ_HIGHPRI |
+					      WQ_MEM_RECLAIM, 1);
+	if (!cptvf->pfvf_mbox_wq)
+		return -ENOMEM;
+
+	if (test_bit(CN10K_MBOX, &cptvf->cap_flag)) {
+		/* For cn10k platform, VF mailbox region is in its BAR2
+		 * register space
+		 */
+		cptvf->pfvf_mbox_base = cptvf->reg_base +
+					CN10K_CPT_VF_MBOX_REGION;
+	} else {
+		offset = pci_resource_start(pdev, PCI_MBOX_BAR_NUM);
+		size = pci_resource_len(pdev, PCI_MBOX_BAR_NUM);
+		/* Map PF-VF mailbox memory */
+		cptvf->pfvf_mbox_base = devm_ioremap_wc(&pdev->dev, offset,
+							size);
+		if (!cptvf->pfvf_mbox_base) {
+			dev_err(&pdev->dev, "Unable to map BAR4\n");
+			ret = -ENOMEM;
+			goto free_wqe;
+		}
+	}
+
+	ret = otx2_mbox_init(&cptvf->pfvf_mbox, cptvf->pfvf_mbox_base,
+			     pdev, cptvf->reg_base, MBOX_DIR_VFPF, 1);
+	if (ret)
+		goto free_wqe;
+
+	ret = otx2_cpt_mbox_bbuf_init(cptvf, pdev);
+	if (ret)
+		goto destroy_mbox;
+
+	INIT_WORK(&cptvf->pfvf_mbox_work, otx2_cptvf_pfvf_mbox_handler);
+	return 0;
+
+destroy_mbox:
+	otx2_mbox_destroy(&cptvf->pfvf_mbox);
+free_wqe:
+	destroy_workqueue(cptvf->pfvf_mbox_wq);
+	return ret;
+}
+
+static void cptvf_pfvf_mbox_destroy(struct otx2_cptvf_dev *cptvf)
+{
+	destroy_workqueue(cptvf->pfvf_mbox_wq);
+	otx2_mbox_destroy(&cptvf->pfvf_mbox);
+}
+
+static void cptlf_work_handler(unsigned long data)
+{
+	otx2_cpt_post_process((struct otx2_cptlf_wqe *) data);
+}
+
+static void cleanup_tasklet_work(struct otx2_cptlfs_info *lfs)
+{
+	int i;
+
+	for (i = 0; i <  lfs->lfs_num; i++) {
+		if (!lfs->lf[i].wqe)
+			continue;
+
+		tasklet_kill(&lfs->lf[i].wqe->work);
+		kfree(lfs->lf[i].wqe);
+		lfs->lf[i].wqe = NULL;
+	}
+}
+
+static int init_tasklet_work(struct otx2_cptlfs_info *lfs)
+{
+	struct otx2_cptlf_wqe *wqe;
+	int i, ret = 0;
+
+	for (i = 0; i < lfs->lfs_num; i++) {
+		wqe = kzalloc(sizeof(struct otx2_cptlf_wqe), GFP_KERNEL);
+		if (!wqe) {
+			ret = -ENOMEM;
+			goto cleanup_tasklet;
+		}
+
+		tasklet_init(&wqe->work, cptlf_work_handler, (u64) wqe);
+		wqe->lfs = lfs;
+		wqe->lf_num = i;
+		lfs->lf[i].wqe = wqe;
+	}
+	return 0;
+
+cleanup_tasklet:
+	cleanup_tasklet_work(lfs);
+	return ret;
+}
+
+static void free_pending_queues(struct otx2_cptlfs_info *lfs)
+{
+	int i;
+
+	for (i = 0; i < lfs->lfs_num; i++) {
+		kfree(lfs->lf[i].pqueue.head);
+		lfs->lf[i].pqueue.head = NULL;
+	}
+}
+
+static int alloc_pending_queues(struct otx2_cptlfs_info *lfs)
+{
+	int size, ret, i;
+
+	if (!lfs->lfs_num)
+		return -EINVAL;
+
+	for (i = 0; i < lfs->lfs_num; i++) {
+		lfs->lf[i].pqueue.qlen = OTX2_CPT_INST_QLEN_MSGS;
+		size = lfs->lf[i].pqueue.qlen *
+		       sizeof(struct otx2_cpt_pending_entry);
+
+		lfs->lf[i].pqueue.head = kzalloc(size, GFP_KERNEL);
+		if (!lfs->lf[i].pqueue.head) {
+			ret = -ENOMEM;
+			goto error;
+		}
+
+		/* Initialize spin lock */
+		spin_lock_init(&lfs->lf[i].pqueue.lock);
+	}
+	return 0;
+
+error:
+	free_pending_queues(lfs);
+	return ret;
+}
+
+static void lf_sw_cleanup(struct otx2_cptlfs_info *lfs)
+{
+	cleanup_tasklet_work(lfs);
+	free_pending_queues(lfs);
+}
+
+static int lf_sw_init(struct otx2_cptlfs_info *lfs)
+{
+	int ret;
+
+	ret = alloc_pending_queues(lfs);
+	if (ret) {
+		dev_err(&lfs->pdev->dev,
+			"Allocating pending queues failed\n");
+		return ret;
+	}
+	ret = init_tasklet_work(lfs);
+	if (ret) {
+		dev_err(&lfs->pdev->dev,
+			"Tasklet work init failed\n");
+		goto pending_queues_free;
+	}
+	return 0;
+
+pending_queues_free:
+	free_pending_queues(lfs);
+	return ret;
+}
+
+static void cptvf_lf_shutdown(struct otx2_cptlfs_info *lfs)
+{
+	atomic_set(&lfs->state, OTX2_CPTLF_IN_RESET);
+
+	/* Remove interrupts affinity */
+	otx2_cptlf_free_irqs_affinity(lfs);
+	/* Disable instruction queue */
+	otx2_cptlf_disable_iqueues(lfs);
+	/* Unregister crypto algorithms */
+	otx2_cpt_crypto_exit(lfs->pdev, THIS_MODULE);
+	/* Unregister LFs interrupts */
+	otx2_cptlf_unregister_interrupts(lfs);
+	/* Cleanup LFs software side */
+	lf_sw_cleanup(lfs);
+	/* Send request to detach LFs */
+	otx2_cpt_detach_rsrcs_msg(lfs);
+}
+
+static int cptvf_lf_init(struct otx2_cptvf_dev *cptvf)
+{
+	struct otx2_cptlfs_info *lfs = &cptvf->lfs;
+	struct device *dev = &cptvf->pdev->dev;
+	int ret, lfs_num;
+	u8 eng_grp_msk;
+
+	/* Get engine group number for symmetric crypto */
+	cptvf->lfs.kcrypto_eng_grp_num = OTX2_CPT_INVALID_CRYPTO_ENG_GRP;
+	ret = otx2_cptvf_send_eng_grp_num_msg(cptvf, OTX2_CPT_SE_TYPES);
+	if (ret)
+		return ret;
+
+	if (cptvf->lfs.kcrypto_eng_grp_num == OTX2_CPT_INVALID_CRYPTO_ENG_GRP) {
+		dev_err(dev, "Engine group for kernel crypto not available\n");
+		ret = -ENOENT;
+		return ret;
+	}
+	eng_grp_msk = 1 << cptvf->lfs.kcrypto_eng_grp_num;
+
+	ret = otx2_cptvf_send_kvf_limits_msg(cptvf);
+	if (ret)
+		return ret;
+
+	lfs->reg_base = cptvf->reg_base;
+	lfs->pdev = cptvf->pdev;
+	lfs->mbox = &cptvf->pfvf_mbox;
+
+	lfs_num = cptvf->lfs.kvf_limits ? cptvf->lfs.kvf_limits :
+		  num_online_cpus();
+	ret = otx2_cptlf_init(lfs, eng_grp_msk, OTX2_CPT_QUEUE_HI_PRIO,
+			      lfs_num);
+	if (ret)
+		return ret;
+
+	/* Get msix offsets for attached LFs */
+	ret = otx2_cpt_msix_offset_msg(lfs);
+	if (ret)
+		goto cleanup_lf;
+
+	/* Initialize LFs software side */
+	ret = lf_sw_init(lfs);
+	if (ret)
+		goto cleanup_lf;
+
+	/* Register LFs interrupts */
+	ret = otx2_cptlf_register_interrupts(lfs);
+	if (ret)
+		goto cleanup_lf_sw;
+
+	/* Set interrupts affinity */
+	ret = otx2_cptlf_set_irqs_affinity(lfs);
+	if (ret)
+		goto unregister_intr;
+
+	atomic_set(&lfs->state, OTX2_CPTLF_STARTED);
+	/* Register crypto algorithms */
+	ret = otx2_cpt_crypto_init(lfs->pdev, THIS_MODULE, lfs_num, 1);
+	if (ret) {
+		dev_err(&lfs->pdev->dev, "algorithms registration failed\n");
+		goto disable_irqs;
+	}
+	return 0;
+
+disable_irqs:
+	otx2_cptlf_free_irqs_affinity(lfs);
+unregister_intr:
+	otx2_cptlf_unregister_interrupts(lfs);
+cleanup_lf_sw:
+	lf_sw_cleanup(lfs);
+cleanup_lf:
+	otx2_cptlf_shutdown(lfs);
+
+	return ret;
+}
+
+static int otx2_cptvf_probe(struct pci_dev *pdev,
+			    const struct pci_device_id *ent)
+{
+	struct device *dev = &pdev->dev;
+	struct otx2_cptvf_dev *cptvf;
+	int ret;
+
+	cptvf = devm_kzalloc(dev, sizeof(*cptvf), GFP_KERNEL);
+	if (!cptvf)
+		return -ENOMEM;
+
+	ret = pcim_enable_device(pdev);
+	if (ret) {
+		dev_err(dev, "Failed to enable PCI device\n");
+		goto clear_drvdata;
+	}
+
+	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
+	if (ret) {
+		dev_err(dev, "Unable to get usable DMA configuration\n");
+		goto clear_drvdata;
+	}
+	/* Map VF's configuration registers */
+	ret = pcim_iomap_regions_request_all(pdev, 1 << PCI_PF_REG_BAR_NUM,
+					     OTX2_CPTVF_DRV_NAME);
+	if (ret) {
+		dev_err(dev, "Couldn't get PCI resources 0x%x\n", ret);
+		goto clear_drvdata;
+	}
+	pci_set_master(pdev);
+	pci_set_drvdata(pdev, cptvf);
+	cptvf->pdev = pdev;
+
+	cptvf->reg_base = pcim_iomap_table(pdev)[PCI_PF_REG_BAR_NUM];
+
+	otx2_cpt_set_hw_caps(pdev, &cptvf->cap_flag);
+
+	ret = cn10k_cptvf_lmtst_init(cptvf);
+	if (ret)
+		goto clear_drvdata;
+
+	/* Initialize PF<=>VF mailbox */
+	ret = cptvf_pfvf_mbox_init(cptvf);
+	if (ret)
+		goto clear_drvdata;
+
+	/* Register interrupts */
+	ret = cptvf_register_interrupts(cptvf);
+	if (ret)
+		goto destroy_pfvf_mbox;
+
+	/* Initialize CPT LFs */
+	ret = cptvf_lf_init(cptvf);
+	if (ret)
+		goto unregister_interrupts;
+
+	return 0;
+
+unregister_interrupts:
+	cptvf_disable_pfvf_mbox_intrs(cptvf);
+destroy_pfvf_mbox:
+	cptvf_pfvf_mbox_destroy(cptvf);
+clear_drvdata:
+	pci_set_drvdata(pdev, NULL);
+
+	return ret;
+}
+
+static void otx2_cptvf_remove(struct pci_dev *pdev)
+{
+	struct otx2_cptvf_dev *cptvf = pci_get_drvdata(pdev);
+
+	if (!cptvf) {
+		dev_err(&pdev->dev, "Invalid CPT VF device.\n");
+		return;
+	}
+	cptvf_lf_shutdown(&cptvf->lfs);
+	/* Disable PF-VF mailbox interrupt */
+	cptvf_disable_pfvf_mbox_intrs(cptvf);
+	/* Destroy PF-VF mbox */
+	cptvf_pfvf_mbox_destroy(cptvf);
+	pci_set_drvdata(pdev, NULL);
+}
+
+/* Supported devices */
+static const struct pci_device_id otx2_cptvf_id_table[] = {
+	{PCI_VDEVICE(CAVIUM, OTX2_CPT_PCI_VF_DEVICE_ID), 0},
+	{PCI_VDEVICE(CAVIUM, CN10K_CPT_PCI_VF_DEVICE_ID), 0},
+	{ 0, }  /* end of table */
+};
+
+static struct pci_driver otx2_cptvf_pci_driver = {
+	.name = OTX2_CPTVF_DRV_NAME,
+	.id_table = otx2_cptvf_id_table,
+	.probe = otx2_cptvf_probe,
+	.remove = otx2_cptvf_remove,
+};
+
+module_pci_driver(otx2_cptvf_pci_driver);
+
+MODULE_IMPORT_NS(CRYPTO_DEV_OCTEONTX2_CPT);
+
+MODULE_AUTHOR("Marvell");
+MODULE_DESCRIPTION("Marvell RVU CPT Virtual Function Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_DEVICE_TABLE(pci, otx2_cptvf_id_table);