linux/drivers/crypto/marvell/octeontx2/cn10k_cpt.c

// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2021 Marvell. */

#include <linux/soc/marvell/octeontx2/asm.h>
#include "otx2_cptpf.h"
#include "otx2_cptvf.h"
#include "otx2_cptlf.h"
#include "cn10k_cpt.h"
#include "otx2_cpt_common.h"

static void cn10k_cpt_send_cmd(union otx2_cpt_inst_s *cptinst, u32 insts_num,
			       struct otx2_cptlf_info *lf);

static struct cpt_hw_ops otx2_hw_ops = {
	.send_cmd = otx2_cpt_send_cmd,
	.cpt_get_compcode = otx2_cpt_get_compcode,
	.cpt_get_uc_compcode = otx2_cpt_get_uc_compcode,
	.cpt_sg_info_create = otx2_sg_info_create,
};

static struct cpt_hw_ops cn10k_hw_ops = {
	.send_cmd = cn10k_cpt_send_cmd,
	.cpt_get_compcode = cn10k_cpt_get_compcode,
	.cpt_get_uc_compcode = cn10k_cpt_get_uc_compcode,
	.cpt_sg_info_create = otx2_sg_info_create,
};

static void cn10k_cpt_send_cmd(union otx2_cpt_inst_s *cptinst, u32 insts_num,
			       struct otx2_cptlf_info *lf)
{
	void *lmtline = lf->lfs->lmt_info.base + (lf->slot * LMTLINE_SIZE);
	u64 val = (lf->slot & 0x7FF);
	u64 tar_addr = 0;

	/* tar_addr<6:4> = Size of first LMTST - 1 in units of 128b. */
	tar_addr |= (__force u64)lf->ioreg |
		    (((OTX2_CPT_INST_SIZE/16) - 1) & 0x7) << 4;
	/*
	 * Make sure memory areas pointed in CPT_INST_S
	 * are flushed before the instruction is sent to CPT
	 */
	dma_wmb();

	/* Copy CPT command to LMTLINE */
	memcpy(lmtline, cptinst, insts_num * OTX2_CPT_INST_SIZE);
	cn10k_lmt_flush(val, tar_addr);
}

void cn10k_cpt_lmtst_free(struct pci_dev *pdev, struct otx2_cptlfs_info *lfs)
{
	struct otx2_lmt_info *lmt_info = &lfs->lmt_info;

	if (!lmt_info->base)
		return;

	dma_free_attrs(&pdev->dev, lmt_info->size,
		       lmt_info->base - lmt_info->align,
		       lmt_info->iova - lmt_info->align,
		       DMA_ATTR_FORCE_CONTIGUOUS);
}
EXPORT_SYMBOL_NS_GPL(cn10k_cpt_lmtst_free, "CRYPTO_DEV_OCTEONTX2_CPT");

static int cn10k_cpt_lmtst_alloc(struct pci_dev *pdev,
				 struct otx2_cptlfs_info *lfs, u32 size)
{
	struct otx2_lmt_info *lmt_info = &lfs->lmt_info;
	dma_addr_t align_iova;
	dma_addr_t iova;

	lmt_info->base = dma_alloc_attrs(&pdev->dev, size, &iova, GFP_KERNEL,
					 DMA_ATTR_FORCE_CONTIGUOUS);
	if (!lmt_info->base)
		return -ENOMEM;

	align_iova = ALIGN((u64)iova, LMTLINE_ALIGN);
	lmt_info->iova = align_iova;
	lmt_info->align = align_iova - iova;
	lmt_info->size = size;
	lmt_info->base += lmt_info->align;
	return 0;
}

int cn10k_cptpf_lmtst_init(struct otx2_cptpf_dev *cptpf)
{
	struct pci_dev *pdev = cptpf->pdev;
	u32 size;
	int ret;

	if (!test_bit(CN10K_LMTST, &cptpf->cap_flag)) {
		cptpf->lfs.ops = &otx2_hw_ops;
		return 0;
	}

	cptpf->lfs.ops = &cn10k_hw_ops;
	size = OTX2_CPT_MAX_VFS_NUM * LMTLINE_SIZE + LMTLINE_ALIGN;
	ret = cn10k_cpt_lmtst_alloc(pdev, &cptpf->lfs, size);
	if (ret) {
		dev_err(&pdev->dev, "PF-%d LMTLINE memory allocation failed\n",
			cptpf->pf_id);
		return ret;
	}

	ret = otx2_cpt_lmtst_tbl_setup_msg(&cptpf->lfs);
	if (ret) {
		dev_err(&pdev->dev, "PF-%d: LMTST Table setup failed\n",
		cptpf->pf_id);
		cn10k_cpt_lmtst_free(pdev, &cptpf->lfs);
	}

	return 0;
}
EXPORT_SYMBOL_NS_GPL(cn10k_cptpf_lmtst_init, "CRYPTO_DEV_OCTEONTX2_CPT");

int cn10k_cptvf_lmtst_init(struct otx2_cptvf_dev *cptvf)
{
	struct pci_dev *pdev = cptvf->pdev;
	u32 size;
	int ret;

	if (!test_bit(CN10K_LMTST, &cptvf->cap_flag))
		return 0;

	size = cptvf->lfs.lfs_num * LMTLINE_SIZE + LMTLINE_ALIGN;
	ret = cn10k_cpt_lmtst_alloc(pdev, &cptvf->lfs, size);
	if (ret) {
		dev_err(&pdev->dev, "VF-%d LMTLINE memory allocation failed\n",
			cptvf->vf_id);
		return ret;
	}

	ret = otx2_cpt_lmtst_tbl_setup_msg(&cptvf->lfs);
	if (ret) {
		dev_err(&pdev->dev, "VF-%d: LMTST Table setup failed\n",
			cptvf->vf_id);
		cn10k_cpt_lmtst_free(pdev, &cptvf->lfs);
	}

	return 0;
}
EXPORT_SYMBOL_NS_GPL(cn10k_cptvf_lmtst_init, "CRYPTO_DEV_OCTEONTX2_CPT");

void cn10k_cpt_hw_ctx_clear(struct pci_dev *pdev,
			    struct cn10k_cpt_errata_ctx *er_ctx)
{
	u64 cptr_dma;

	if (!is_dev_cn10ka_ax(pdev))
		return;

	cptr_dma = er_ctx->cptr_dma & ~(BIT_ULL(60));
	cn10k_cpt_ctx_flush(pdev, cptr_dma, true);
	dma_unmap_single(&pdev->dev, cptr_dma, CN10K_CPT_HW_CTX_SIZE,
			 DMA_BIDIRECTIONAL);
	kfree(er_ctx->hw_ctx);
}
EXPORT_SYMBOL_NS_GPL(cn10k_cpt_hw_ctx_clear, "CRYPTO_DEV_OCTEONTX2_CPT");

void cn10k_cpt_hw_ctx_set(union cn10k_cpt_hw_ctx *hctx, u16 ctx_sz)
{
	hctx->w0.aop_valid = 1;
	hctx->w0.ctx_hdr_sz = 0;
	hctx->w0.ctx_sz = ctx_sz;
	hctx->w0.ctx_push_sz = 1;
}
EXPORT_SYMBOL_NS_GPL(cn10k_cpt_hw_ctx_set, "CRYPTO_DEV_OCTEONTX2_CPT");

int cn10k_cpt_hw_ctx_init(struct pci_dev *pdev,
			  struct cn10k_cpt_errata_ctx *er_ctx)
{
	union cn10k_cpt_hw_ctx *hctx;
	u64 cptr_dma;

	er_ctx->cptr_dma = 0;
	er_ctx->hw_ctx = NULL;

	if (!is_dev_cn10ka_ax(pdev))
		return 0;

	hctx = kmalloc(CN10K_CPT_HW_CTX_SIZE, GFP_KERNEL);
	if (unlikely(!hctx))
		return -ENOMEM;
	cptr_dma = dma_map_single(&pdev->dev, hctx, CN10K_CPT_HW_CTX_SIZE,
				  DMA_BIDIRECTIONAL);
	if (dma_mapping_error(&pdev->dev, cptr_dma)) {
		kfree(hctx);
		return -ENOMEM;
	}

	cn10k_cpt_hw_ctx_set(hctx, 1);
	er_ctx->hw_ctx = hctx;
	er_ctx->cptr_dma = cptr_dma | BIT_ULL(60);

	return 0;
}
EXPORT_SYMBOL_NS_GPL(cn10k_cpt_hw_ctx_init, "CRYPTO_DEV_OCTEONTX2_CPT");

void cn10k_cpt_ctx_flush(struct pci_dev *pdev, u64 cptr, bool inval)
{
	struct otx2_cptvf_dev *cptvf = pci_get_drvdata(pdev);
	struct otx2_cptlfs_info *lfs = &cptvf->lfs;
	u64 reg;

	reg = (uintptr_t)cptr >> 7;
	if (inval)
		reg = reg | BIT_ULL(46);

	otx2_cpt_write64(lfs->reg_base, lfs->blkaddr, lfs->lf[0].slot,
			 OTX2_CPT_LF_CTX_FLUSH, reg);
	/* Make sure that the FLUSH operation is complete */
	wmb();
	otx2_cpt_read64(lfs->reg_base, lfs->blkaddr, lfs->lf[0].slot,
			OTX2_CPT_LF_CTX_ERR);
}
EXPORT_SYMBOL_NS_GPL(cn10k_cpt_ctx_flush, "CRYPTO_DEV_OCTEONTX2_CPT");

void cptvf_hw_ops_get(struct otx2_cptvf_dev *cptvf)
{
	if (test_bit(CN10K_LMTST, &cptvf->cap_flag))
		cptvf->lfs.ops = &cn10k_hw_ops;
	else
		cptvf->lfs.ops = &otx2_hw_ops;
}
EXPORT_SYMBOL_NS_GPL(cptvf_hw_ops_get, "CRYPTO_DEV_OCTEONTX2_CPT");