Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-only
/**
 * Routines supporting the Power 7+ Nest Accelerators driver
 *
 * Copyright (C) 2011-2012 International Business Machines Inc.
 *
 * Author: Kent Yoder <yoder1@us.ibm.com>
 */
 
#include <crypto/internal/aead.h>
#include <crypto/internal/hash.h>
#include <crypto/aes.h>
#include <crypto/sha.h>
#include <crypto/algapi.h>
#include <crypto/scatterwalk.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/scatterlist.h>
#include <linux/device.h>
#include <linux/of.h>
#include <asm/hvcall.h>
#include <asm/vio.h>
 
#include "nx_csbcpb.h"
#include "nx.h"
 
 
/**
 * nx_hcall_sync - make an H_COP_OP hcall for the passed in op structure
 *
 * @nx_ctx: the crypto context handle
 * @op: PFO operation struct to pass in
 * @may_sleep: flag indicating the request can sleep
 *
 * Make the hcall, retrying while the hardware is busy. If we cannot yield
 * the thread, limit the number of retries to 10 here.
 */
int nx_hcall_sync(struct nx_crypto_ctx *nx_ctx,
<------><------>  struct vio_pfo_op    *op,
<------><------>  u32                   may_sleep)
{
<------>int rc, retries = 10;
<------>struct vio_dev *viodev = nx_driver.viodev;
 
<------>atomic_inc(&(nx_ctx->stats->sync_ops));
 
<------>do {
<------><------>rc = vio_h_cop_sync(viodev, op);
<------>} while (rc == -EBUSY && !may_sleep && retries--);
 
<------>if (rc) {
<------><------>dev_dbg(&viodev->dev, "vio_h_cop_sync failed: rc: %d "
<------><------><------>"hcall rc: %ld\n", rc, op->hcall_err);
<------><------>atomic_inc(&(nx_ctx->stats->errors));
<------><------>atomic_set(&(nx_ctx->stats->last_error), op->hcall_err);
<------><------>atomic_set(&(nx_ctx->stats->last_error_pid), current->pid);
<------>}
 
<------>return rc;
}
 
/**
 * nx_build_sg_list - build an NX scatter list describing a single  buffer
 *
 * @sg_head: pointer to the first scatter list element to build
 * @start_addr: pointer to the linear buffer
 * @len: length of the data at @start_addr
 * @sgmax: the largest number of scatter list elements we're allowed to create
 *
 * This function will start writing nx_sg elements at @sg_head and keep
 * writing them until all of the data from @start_addr is described or
 * until sgmax elements have been written. Scatter list elements will be
 * created such that none of the elements describes a buffer that crosses a 4K
 * boundary.
 */
struct nx_sg *nx_build_sg_list(struct nx_sg *sg_head,
<------><------><------>       u8           *start_addr,
<------><------><------>       unsigned int *len,
<------><------><------>       u32           sgmax)
{
<------>unsigned int sg_len = 0;
<------>struct nx_sg *sg;
<------>u64 sg_addr = (u64)start_addr;
<------>u64 end_addr;
 
<------>/* determine the start and end for this address range - slightly
<------> * different if this is in VMALLOC_REGION */
<------>if (is_vmalloc_addr(start_addr))
<------><------>sg_addr = page_to_phys(vmalloc_to_page(start_addr))
<------><------><------>  + offset_in_page(sg_addr);
<------>else
<------><------>sg_addr = __pa(sg_addr);
 
<------>end_addr = sg_addr + *len;
 
<------>/* each iteration will write one struct nx_sg element and add the
<------> * length of data described by that element to sg_len. Once @len bytes
<------> * have been described (or @sgmax elements have been written), the
<------> * loop ends. min_t is used to ensure @end_addr falls on the same page
<------> * as sg_addr, if not, we need to create another nx_sg element for the
<------> * data on the next page.
<------> *
<------> * Also when using vmalloc'ed data, every time that a system page
<------> * boundary is crossed the physical address needs to be re-calculated.
<------> */
<------>for (sg = sg_head; sg_len < *len; sg++) {
<------><------>u64 next_page;
 
<------><------>sg->addr = sg_addr;
<------><------>sg_addr = min_t(u64, NX_PAGE_NUM(sg_addr + NX_PAGE_SIZE),
<------><------><------><------>end_addr);
 
<------><------>next_page = (sg->addr & PAGE_MASK) + PAGE_SIZE;
<------><------>sg->len = min_t(u64, sg_addr, next_page) - sg->addr;
<------><------>sg_len += sg->len;
 
<------><------>if (sg_addr >= next_page &&
<------><------><------><------>is_vmalloc_addr(start_addr + sg_len)) {
<------><------><------>sg_addr = page_to_phys(vmalloc_to_page(
<------><------><------><------><------><------>start_addr + sg_len));
<------><------><------>end_addr = sg_addr + *len - sg_len;
<------><------>}
 
<------><------>if ((sg - sg_head) == sgmax) {
<------><------><------>pr_err("nx: scatter/gather list overflow, pid: %d\n",
<------><------><------>       current->pid);
<------><------><------>sg++;
<------><------><------>break;
<------><------>}
<------>}
<------>*len = sg_len;
 
<------>/* return the moved sg_head pointer */
<------>return sg;
}
 
/**
 * nx_walk_and_build - walk a linux scatterlist and build an nx scatterlist
 *
 * @nx_dst: pointer to the first nx_sg element to write
 * @sglen: max number of nx_sg entries we're allowed to write
 * @sg_src: pointer to the source linux scatterlist to walk
 * @start: number of bytes to fast-forward past at the beginning of @sg_src
 * @src_len: number of bytes to walk in @sg_src
 */
struct nx_sg *nx_walk_and_build(struct nx_sg       *nx_dst,
<------><------><------><------>unsigned int        sglen,
<------><------><------><------>struct scatterlist *sg_src,
<------><------><------><------>unsigned int        start,
<------><------><------><------>unsigned int       *src_len)
{
<------>struct scatter_walk walk;
<------>struct nx_sg *nx_sg = nx_dst;
<------>unsigned int n, offset = 0, len = *src_len;
<------>char *dst;
 
<------>/* we need to fast forward through @start bytes first */
<------>for (;;) {
<------><------>scatterwalk_start(&walk, sg_src);
 
<------><------>if (start < offset + sg_src->length)
<------><------><------>break;
 
<------><------>offset += sg_src->length;
<------><------>sg_src = sg_next(sg_src);
<------>}
 
<------>/* start - offset is the number of bytes to advance in the scatterlist
<------> * element we're currently looking at */
<------>scatterwalk_advance(&walk, start - offset);
 
<------>while (len && (nx_sg - nx_dst) < sglen) {
<------><------>n = scatterwalk_clamp(&walk, len);
<------><------>if (!n) {
<------><------><------>/* In cases where we have scatterlist chain sg_next
<------><------><------> * handles with it properly */
<------><------><------>scatterwalk_start(&walk, sg_next(walk.sg));
<------><------><------>n = scatterwalk_clamp(&walk, len);
<------><------>}
<------><------>dst = scatterwalk_map(&walk);
 
<------><------>nx_sg = nx_build_sg_list(nx_sg, dst, &n, sglen - (nx_sg - nx_dst));
<------><------>len -= n;
 
<------><------>scatterwalk_unmap(dst);
<------><------>scatterwalk_advance(&walk, n);
<------><------>scatterwalk_done(&walk, SCATTERWALK_FROM_SG, len);
<------>}
<------>/* update to_process */
<------>*src_len -= len;
 
<------>/* return the moved destination pointer */
<------>return nx_sg;
}
 
/**
 * trim_sg_list - ensures the bound in sg list.
 * @sg: sg list head
 * @end: sg lisg end
 * @delta:  is the amount we need to crop in order to bound the list.
 *
 */
static long int trim_sg_list(struct nx_sg *sg,
<------><------><------>     struct nx_sg *end,
<------><------><------>     unsigned int delta,
<------><------><------>     unsigned int *nbytes)
{
<------>long int oplen;
<------>long int data_back;
<------>unsigned int is_delta = delta;
 
<------>while (delta && end > sg) {
<------><------>struct nx_sg *last = end - 1;
 
<------><------>if (last->len > delta) {
<------><------><------>last->len -= delta;
<------><------><------>delta = 0;
<------><------>} else {
<------><------><------>end--;
<------><------><------>delta -= last->len;
<------><------>}
<------>}
 
<------>/* There are cases where we need to crop list in order to make it
<------> * a block size multiple, but we also need to align data. In order to
<------> * that we need to calculate how much we need to put back to be
<------> * processed
<------> */
<------>oplen = (sg - end) * sizeof(struct nx_sg);
<------>if (is_delta) {
<------><------>data_back = (abs(oplen) / AES_BLOCK_SIZE) *  sg->len;
<------><------>data_back = *nbytes - (data_back & ~(AES_BLOCK_SIZE - 1));
<------><------>*nbytes -= data_back;
<------>}
 
<------>return oplen;
}
 
/**
 * nx_build_sg_lists - walk the input scatterlists and build arrays of NX
 *                     scatterlists based on them.
 *
 * @nx_ctx: NX crypto context for the lists we're building
 * @iv: iv data, if the algorithm requires it
 * @dst: destination scatterlist
 * @src: source scatterlist
 * @nbytes: length of data described in the scatterlists
 * @offset: number of bytes to fast-forward past at the beginning of
 *          scatterlists.
 * @oiv: destination for the iv data, if the algorithm requires it
 *
 * This is common code shared by all the AES algorithms. It uses the crypto
 * scatterlist walk routines to traverse input and output scatterlists, building
 * corresponding NX scatterlists
 */
int nx_build_sg_lists(struct nx_crypto_ctx  *nx_ctx,
<------><------>      const u8              *iv,
<------><------>      struct scatterlist    *dst,
<------><------>      struct scatterlist    *src,
<------><------>      unsigned int          *nbytes,
<------><------>      unsigned int           offset,
<------><------>      u8                    *oiv)
{
<------>unsigned int delta = 0;
<------>unsigned int total = *nbytes;
<------>struct nx_sg *nx_insg = nx_ctx->in_sg;
<------>struct nx_sg *nx_outsg = nx_ctx->out_sg;
<------>unsigned int max_sg_len;
 
<------>max_sg_len = min_t(u64, nx_ctx->ap->sglen,
<------><------><------>nx_driver.of.max_sg_len/sizeof(struct nx_sg));
<------>max_sg_len = min_t(u64, max_sg_len,
<------><------><------>nx_ctx->ap->databytelen/NX_PAGE_SIZE);
 
<------>if (oiv)
<------><------>memcpy(oiv, iv, AES_BLOCK_SIZE);
 
<------>*nbytes = min_t(u64, *nbytes, nx_ctx->ap->databytelen);
 
<------>nx_outsg = nx_walk_and_build(nx_outsg, max_sg_len, dst,
<------><------><------><------><------>offset, nbytes);
<------>nx_insg = nx_walk_and_build(nx_insg, max_sg_len, src,
<------><------><------><------><------>offset, nbytes);
 
<------>if (*nbytes < total)
<------><------>delta = *nbytes - (*nbytes & ~(AES_BLOCK_SIZE - 1));
 
<------>/* these lengths should be negative, which will indicate to phyp that
<------> * the input and output parameters are scatterlists, not linear
<------> * buffers */
<------>nx_ctx->op.inlen = trim_sg_list(nx_ctx->in_sg, nx_insg, delta, nbytes);
<------>nx_ctx->op.outlen = trim_sg_list(nx_ctx->out_sg, nx_outsg, delta, nbytes);
 
<------>return 0;
}
 
/**
 * nx_ctx_init - initialize an nx_ctx's vio_pfo_op struct
 *
 * @nx_ctx: the nx context to initialize
 * @function: the function code for the op
 */
void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function)
{
<------>spin_lock_init(&nx_ctx->lock);
<------>memset(nx_ctx->kmem, 0, nx_ctx->kmem_len);
<------>nx_ctx->csbcpb->csb.valid |= NX_CSB_VALID_BIT;
 
<------>nx_ctx->op.flags = function;
<------>nx_ctx->op.csbcpb = __pa(nx_ctx->csbcpb);
<------>nx_ctx->op.in = __pa(nx_ctx->in_sg);
<------>nx_ctx->op.out = __pa(nx_ctx->out_sg);
 
<------>if (nx_ctx->csbcpb_aead) {
<------><------>nx_ctx->csbcpb_aead->csb.valid |= NX_CSB_VALID_BIT;
 
<------><------>nx_ctx->op_aead.flags = function;
<------><------>nx_ctx->op_aead.csbcpb = __pa(nx_ctx->csbcpb_aead);
<------><------>nx_ctx->op_aead.in = __pa(nx_ctx->in_sg);
<------><------>nx_ctx->op_aead.out = __pa(nx_ctx->out_sg);
<------>}
}
 
static void nx_of_update_status(struct device   *dev,
<------><------><------>       struct property *p,
<------><------><------>       struct nx_of    *props)
{
<------>if (!strncmp(p->value, "okay", p->length)) {
<------><------>props->status = NX_WAITING;
<------><------>props->flags |= NX_OF_FLAG_STATUS_SET;
<------>} else {
<------><------>dev_info(dev, "%s: status '%s' is not 'okay'\n", __func__,
<------><------><------> (char *)p->value);
<------>}
}
 
static void nx_of_update_sglen(struct device   *dev,
<------><------><------>       struct property *p,
<------><------><------>       struct nx_of    *props)
{
<------>if (p->length != sizeof(props->max_sg_len)) {
<------><------>dev_err(dev, "%s: unexpected format for "
<------><------><------>"ibm,max-sg-len property\n", __func__);
<------><------>dev_dbg(dev, "%s: ibm,max-sg-len is %d bytes "
<------><------><------>"long, expected %zd bytes\n", __func__,
<------><------><------>p->length, sizeof(props->max_sg_len));
<------><------>return;
<------>}
 
<------>props->max_sg_len = *(u32 *)p->value;
<------>props->flags |= NX_OF_FLAG_MAXSGLEN_SET;
}
 
static void nx_of_update_msc(struct device   *dev,
<------><------><------>     struct property *p,
<------><------><------>     struct nx_of    *props)
{
<------>struct msc_triplet *trip;
<------>struct max_sync_cop *msc;
<------>unsigned int bytes_so_far, i, lenp;
 
<------>msc = (struct max_sync_cop *)p->value;
<------>lenp = p->length;
 
<------>/* You can't tell if the data read in for this property is sane by its
<------> * size alone. This is because there are sizes embedded in the data
<------> * structure. The best we can do is check lengths as we parse and bail
<------> * as soon as a length error is detected. */
<------>bytes_so_far = 0;
 
<------>while ((bytes_so_far + sizeof(struct max_sync_cop)) <= lenp) {
<------><------>bytes_so_far += sizeof(struct max_sync_cop);
 
<------><------>trip = msc->trip;
 
<------><------>for (i = 0;
<------><------>     ((bytes_so_far + sizeof(struct msc_triplet)) <= lenp) &&
<------><------>     i < msc->triplets;
<------><------>     i++) {
<------><------><------>if (msc->fc >= NX_MAX_FC || msc->mode >= NX_MAX_MODE) {
<------><------><------><------>dev_err(dev, "unknown function code/mode "
<------><------><------><------><------>"combo: %d/%d (ignored)\n", msc->fc,
<------><------><------><------><------>msc->mode);
<------><------><------><------>goto next_loop;
<------><------><------>}
 
<------><------><------>if (!trip->sglen || trip->databytelen < NX_PAGE_SIZE) {
<------><------><------><------>dev_warn(dev, "bogus sglen/databytelen: "
<------><------><------><------><------> "%u/%u (ignored)\n", trip->sglen,
<------><------><------><------><------> trip->databytelen);
<------><------><------><------>goto next_loop;
<------><------><------>}
 
<------><------><------>switch (trip->keybitlen) {
<------><------><------>case 128:
<------><------><------>case 160:
<------><------><------><------>props->ap[msc->fc][msc->mode][0].databytelen =
<------><------><------><------><------>trip->databytelen;
<------><------><------><------>props->ap[msc->fc][msc->mode][0].sglen =
<------><------><------><------><------>trip->sglen;
<------><------><------><------>break;
<------><------><------>case 192:
<------><------><------><------>props->ap[msc->fc][msc->mode][1].databytelen =
<------><------><------><------><------>trip->databytelen;
<------><------><------><------>props->ap[msc->fc][msc->mode][1].sglen =
<------><------><------><------><------>trip->sglen;
<------><------><------><------>break;
<------><------><------>case 256:
<------><------><------><------>if (msc->fc == NX_FC_AES) {
<------><------><------><------><------>props->ap[msc->fc][msc->mode][2].
<------><------><------><------><------><------>databytelen = trip->databytelen;
<------><------><------><------><------>props->ap[msc->fc][msc->mode][2].sglen =
<------><------><------><------><------><------>trip->sglen;
<------><------><------><------>} else if (msc->fc == NX_FC_AES_HMAC ||
<------><------><------><------><------>   msc->fc == NX_FC_SHA) {
<------><------><------><------><------>props->ap[msc->fc][msc->mode][1].
<------><------><------><------><------><------>databytelen = trip->databytelen;
<------><------><------><------><------>props->ap[msc->fc][msc->mode][1].sglen =
<------><------><------><------><------><------>trip->sglen;
<------><------><------><------>} else {
<------><------><------><------><------>dev_warn(dev, "unknown function "
<------><------><------><------><------><------>"code/key bit len combo"
<------><------><------><------><------><------>": (%u/256)\n", msc->fc);
<------><------><------><------>}
<------><------><------><------>break;
<------><------><------>case 512:
<------><------><------><------>props->ap[msc->fc][msc->mode][2].databytelen =
<------><------><------><------><------>trip->databytelen;
<------><------><------><------>props->ap[msc->fc][msc->mode][2].sglen =
<------><------><------><------><------>trip->sglen;
<------><------><------><------>break;
<------><------><------>default:
<------><------><------><------>dev_warn(dev, "unknown function code/key bit "
<------><------><------><------><------> "len combo: (%u/%u)\n", msc->fc,
<------><------><------><------><------> trip->keybitlen);
<------><------><------><------>break;
<------><------><------>}
next_loop:
<------><------><------>bytes_so_far += sizeof(struct msc_triplet);
<------><------><------>trip++;
<------><------>}
 
<------><------>msc = (struct max_sync_cop *)trip;
<------>}
 
<------>props->flags |= NX_OF_FLAG_MAXSYNCCOP_SET;
}
 
/**
 * nx_of_init - read openFirmware values from the device tree
 *
 * @dev: device handle
 * @props: pointer to struct to hold the properties values
 *
 * Called once at driver probe time, this function will read out the
 * openFirmware properties we use at runtime. If all the OF properties are
 * acceptable, when we exit this function props->flags will indicate that
 * we're ready to register our crypto algorithms.
 */
static void nx_of_init(struct device *dev, struct nx_of *props)
{
<------>struct device_node *base_node = dev->of_node;
<------>struct property *p;
 
<------>p = of_find_property(base_node, "status", NULL);
<------>if (!p)
<------><------>dev_info(dev, "%s: property 'status' not found\n", __func__);
<------>else
<------><------>nx_of_update_status(dev, p, props);
 
<------>p = of_find_property(base_node, "ibm,max-sg-len", NULL);
<------>if (!p)
<------><------>dev_info(dev, "%s: property 'ibm,max-sg-len' not found\n",
<------><------><------> __func__);
<------>else
<------><------>nx_of_update_sglen(dev, p, props);
 
<------>p = of_find_property(base_node, "ibm,max-sync-cop", NULL);
<------>if (!p)
<------><------>dev_info(dev, "%s: property 'ibm,max-sync-cop' not found\n",
<------><------><------> __func__);
<------>else
<------><------>nx_of_update_msc(dev, p, props);
}
 
static bool nx_check_prop(struct device *dev, u32 fc, u32 mode, int slot)
{
<------>struct alg_props *props = &nx_driver.of.ap[fc][mode][slot];
 
<------>if (!props->sglen || props->databytelen < NX_PAGE_SIZE) {
<------><------>if (dev)
<------><------><------>dev_warn(dev, "bogus sglen/databytelen for %u/%u/%u: "
<------><------><------><------> "%u/%u (ignored)\n", fc, mode, slot,
<------><------><------><------> props->sglen, props->databytelen);
<------><------>return false;
<------>}
 
<------>return true;
}
 
static bool nx_check_props(struct device *dev, u32 fc, u32 mode)
{
<------>int i;
 
<------>for (i = 0; i < 3; i++)
<------><------>if (!nx_check_prop(dev, fc, mode, i))
<------><------><------>return false;
 
<------>return true;
}
 
static int nx_register_skcipher(struct skcipher_alg *alg, u32 fc, u32 mode)
{
<------>return nx_check_props(&nx_driver.viodev->dev, fc, mode) ?
<------>       crypto_register_skcipher(alg) : 0;
}
 
static int nx_register_aead(struct aead_alg *alg, u32 fc, u32 mode)
{
<------>return nx_check_props(&nx_driver.viodev->dev, fc, mode) ?
<------>       crypto_register_aead(alg) : 0;
}
 
static int nx_register_shash(struct shash_alg *alg, u32 fc, u32 mode, int slot)
{
<------>return (slot >= 0 ? nx_check_prop(&nx_driver.viodev->dev,
<------><------><------><------><------>  fc, mode, slot) :
<------><------><------>    nx_check_props(&nx_driver.viodev->dev, fc, mode)) ?
<------>       crypto_register_shash(alg) : 0;
}
 
static void nx_unregister_skcipher(struct skcipher_alg *alg, u32 fc, u32 mode)
{
<------>if (nx_check_props(NULL, fc, mode))
<------><------>crypto_unregister_skcipher(alg);
}
 
static void nx_unregister_aead(struct aead_alg *alg, u32 fc, u32 mode)
{
<------>if (nx_check_props(NULL, fc, mode))
<------><------>crypto_unregister_aead(alg);
}
 
static void nx_unregister_shash(struct shash_alg *alg, u32 fc, u32 mode,
<------><------><------><------>int slot)
{
<------>if (slot >= 0 ? nx_check_prop(NULL, fc, mode, slot) :
<------><------><------>nx_check_props(NULL, fc, mode))
<------><------>crypto_unregister_shash(alg);
}
 
/**
 * nx_register_algs - register algorithms with the crypto API
 *
 * Called from nx_probe()
 *
 * If all OF properties are in an acceptable state, the driver flags will
 * indicate that we're ready and we'll create our debugfs files and register
 * out crypto algorithms.
 */
static int nx_register_algs(void)
{
<------>int rc = -1;
 
<------>if (nx_driver.of.flags != NX_OF_FLAG_MASK_READY)
<------><------>goto out;
 
<------>memset(&nx_driver.stats, 0, sizeof(struct nx_stats));
 
<------>NX_DEBUGFS_INIT(&nx_driver);
 
<------>nx_driver.of.status = NX_OKAY;
 
<------>rc = nx_register_skcipher(&nx_ecb_aes_alg, NX_FC_AES, NX_MODE_AES_ECB);
<------>if (rc)
<------><------>goto out;
 
<------>rc = nx_register_skcipher(&nx_cbc_aes_alg, NX_FC_AES, NX_MODE_AES_CBC);
<------>if (rc)
<------><------>goto out_unreg_ecb;
 
<------>rc = nx_register_skcipher(&nx_ctr3686_aes_alg, NX_FC_AES,
<------><------><------><------>  NX_MODE_AES_CTR);
<------>if (rc)
<------><------>goto out_unreg_cbc;
 
<------>rc = nx_register_aead(&nx_gcm_aes_alg, NX_FC_AES, NX_MODE_AES_GCM);
<------>if (rc)
<------><------>goto out_unreg_ctr3686;
 
<------>rc = nx_register_aead(&nx_gcm4106_aes_alg, NX_FC_AES, NX_MODE_AES_GCM);
<------>if (rc)
<------><------>goto out_unreg_gcm;
 
<------>rc = nx_register_aead(&nx_ccm_aes_alg, NX_FC_AES, NX_MODE_AES_CCM);
<------>if (rc)
<------><------>goto out_unreg_gcm4106;
 
<------>rc = nx_register_aead(&nx_ccm4309_aes_alg, NX_FC_AES, NX_MODE_AES_CCM);
<------>if (rc)
<------><------>goto out_unreg_ccm;
 
<------>rc = nx_register_shash(&nx_shash_sha256_alg, NX_FC_SHA, NX_MODE_SHA,
<------><------><------>       NX_PROPS_SHA256);
<------>if (rc)
<------><------>goto out_unreg_ccm4309;
 
<------>rc = nx_register_shash(&nx_shash_sha512_alg, NX_FC_SHA, NX_MODE_SHA,
<------><------><------>       NX_PROPS_SHA512);
<------>if (rc)
<------><------>goto out_unreg_s256;
 
<------>rc = nx_register_shash(&nx_shash_aes_xcbc_alg,
<------><------><------>       NX_FC_AES, NX_MODE_AES_XCBC_MAC, -1);
<------>if (rc)
<------><------>goto out_unreg_s512;
 
<------>goto out;
 
out_unreg_s512:
<------>nx_unregister_shash(&nx_shash_sha512_alg, NX_FC_SHA, NX_MODE_SHA,
<------><------><------>    NX_PROPS_SHA512);
out_unreg_s256:
<------>nx_unregister_shash(&nx_shash_sha256_alg, NX_FC_SHA, NX_MODE_SHA,
<------><------><------>    NX_PROPS_SHA256);
out_unreg_ccm4309:
<------>nx_unregister_aead(&nx_ccm4309_aes_alg, NX_FC_AES, NX_MODE_AES_CCM);
out_unreg_ccm:
<------>nx_unregister_aead(&nx_ccm_aes_alg, NX_FC_AES, NX_MODE_AES_CCM);
out_unreg_gcm4106:
<------>nx_unregister_aead(&nx_gcm4106_aes_alg, NX_FC_AES, NX_MODE_AES_GCM);
out_unreg_gcm:
<------>nx_unregister_aead(&nx_gcm_aes_alg, NX_FC_AES, NX_MODE_AES_GCM);
out_unreg_ctr3686:
<------>nx_unregister_skcipher(&nx_ctr3686_aes_alg, NX_FC_AES, NX_MODE_AES_CTR);
out_unreg_cbc:
<------>nx_unregister_skcipher(&nx_cbc_aes_alg, NX_FC_AES, NX_MODE_AES_CBC);
out_unreg_ecb:
<------>nx_unregister_skcipher(&nx_ecb_aes_alg, NX_FC_AES, NX_MODE_AES_ECB);
out:
<------>return rc;
}
 
/**
 * nx_crypto_ctx_init - create and initialize a crypto api context
 *
 * @nx_ctx: the crypto api context
 * @fc: function code for the context
 * @mode: the function code specific mode for this context
 */
static int nx_crypto_ctx_init(struct nx_crypto_ctx *nx_ctx, u32 fc, u32 mode)
{
<------>if (nx_driver.of.status != NX_OKAY) {
<------><------>pr_err("Attempt to initialize NX crypto context while device "
<------><------>       "is not available!\n");
<------><------>return -ENODEV;
<------>}
 
<------>/* we need an extra page for csbcpb_aead for these modes */
<------>if (mode == NX_MODE_AES_GCM || mode == NX_MODE_AES_CCM)
<------><------>nx_ctx->kmem_len = (5 * NX_PAGE_SIZE) +
<------><------><------><------>   sizeof(struct nx_csbcpb);
<------>else
<------><------>nx_ctx->kmem_len = (4 * NX_PAGE_SIZE) +
<------><------><------><------>   sizeof(struct nx_csbcpb);
 
<------>nx_ctx->kmem = kmalloc(nx_ctx->kmem_len, GFP_KERNEL);
<------>if (!nx_ctx->kmem)
<------><------>return -ENOMEM;
 
<------>/* the csbcpb and scatterlists must be 4K aligned pages */
<------>nx_ctx->csbcpb = (struct nx_csbcpb *)(round_up((u64)nx_ctx->kmem,
<------><------><------><------><------><------>       (u64)NX_PAGE_SIZE));
<------>nx_ctx->in_sg = (struct nx_sg *)((u8 *)nx_ctx->csbcpb + NX_PAGE_SIZE);
<------>nx_ctx->out_sg = (struct nx_sg *)((u8 *)nx_ctx->in_sg + NX_PAGE_SIZE);
 
<------>if (mode == NX_MODE_AES_GCM || mode == NX_MODE_AES_CCM)
<------><------>nx_ctx->csbcpb_aead =
<------><------><------>(struct nx_csbcpb *)((u8 *)nx_ctx->out_sg +
<------><------><------><------><------>     NX_PAGE_SIZE);
 
<------>/* give each context a pointer to global stats and their OF
<------> * properties */
<------>nx_ctx->stats = &nx_driver.stats;
<------>memcpy(nx_ctx->props, nx_driver.of.ap[fc][mode],
<------>       sizeof(struct alg_props) * 3);
 
<------>return 0;
}
 
/* entry points from the crypto tfm initializers */
int nx_crypto_ctx_aes_ccm_init(struct crypto_aead *tfm)
{
<------>crypto_aead_set_reqsize(tfm, sizeof(struct nx_ccm_rctx));
<------>return nx_crypto_ctx_init(crypto_aead_ctx(tfm), NX_FC_AES,
<------><------><------><------>  NX_MODE_AES_CCM);
}
 
int nx_crypto_ctx_aes_gcm_init(struct crypto_aead *tfm)
{
<------>crypto_aead_set_reqsize(tfm, sizeof(struct nx_gcm_rctx));
<------>return nx_crypto_ctx_init(crypto_aead_ctx(tfm), NX_FC_AES,
<------><------><------><------>  NX_MODE_AES_GCM);
}
 
int nx_crypto_ctx_aes_ctr_init(struct crypto_skcipher *tfm)
{
<------>return nx_crypto_ctx_init(crypto_skcipher_ctx(tfm), NX_FC_AES,
<------><------><------><------>  NX_MODE_AES_CTR);
}
 
int nx_crypto_ctx_aes_cbc_init(struct crypto_skcipher *tfm)
{
<------>return nx_crypto_ctx_init(crypto_skcipher_ctx(tfm), NX_FC_AES,
<------><------><------><------>  NX_MODE_AES_CBC);
}
 
int nx_crypto_ctx_aes_ecb_init(struct crypto_skcipher *tfm)
{
<------>return nx_crypto_ctx_init(crypto_skcipher_ctx(tfm), NX_FC_AES,
<------><------><------><------>  NX_MODE_AES_ECB);
}
 
int nx_crypto_ctx_sha_init(struct crypto_tfm *tfm)
{
<------>return nx_crypto_ctx_init(crypto_tfm_ctx(tfm), NX_FC_SHA, NX_MODE_SHA);
}
 
int nx_crypto_ctx_aes_xcbc_init(struct crypto_tfm *tfm)
{
<------>return nx_crypto_ctx_init(crypto_tfm_ctx(tfm), NX_FC_AES,
<------><------><------><------>  NX_MODE_AES_XCBC_MAC);
}
 
/**
 * nx_crypto_ctx_exit - destroy a crypto api context
 *
 * @tfm: the crypto transform pointer for the context
 *
 * As crypto API contexts are destroyed, this exit hook is called to free the
 * memory associated with it.
 */
void nx_crypto_ctx_exit(struct crypto_tfm *tfm)
{
<------>struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(tfm);
 
<------>kfree_sensitive(nx_ctx->kmem);
<------>nx_ctx->csbcpb = NULL;
<------>nx_ctx->csbcpb_aead = NULL;
<------>nx_ctx->in_sg = NULL;
<------>nx_ctx->out_sg = NULL;
}
 
void nx_crypto_ctx_skcipher_exit(struct crypto_skcipher *tfm)
{
<------>nx_crypto_ctx_exit(crypto_skcipher_ctx(tfm));
}
 
void nx_crypto_ctx_aead_exit(struct crypto_aead *tfm)
{
<------>struct nx_crypto_ctx *nx_ctx = crypto_aead_ctx(tfm);
 
<------>kfree_sensitive(nx_ctx->kmem);
}
 
static int nx_probe(struct vio_dev *viodev, const struct vio_device_id *id)
{
<------>dev_dbg(&viodev->dev, "driver probed: %s resource id: 0x%x\n",
<------><------>viodev->name, viodev->resource_id);
 
<------>if (nx_driver.viodev) {
<------><------>dev_err(&viodev->dev, "%s: Attempt to register more than one "
<------><------><------>"instance of the hardware\n", __func__);
<------><------>return -EINVAL;
<------>}
 
<------>nx_driver.viodev = viodev;
 
<------>nx_of_init(&viodev->dev, &nx_driver.of);
 
<------>return nx_register_algs();
}
 
static int nx_remove(struct vio_dev *viodev)
{
<------>dev_dbg(&viodev->dev, "entering nx_remove for UA 0x%x\n",
<------><------>viodev->unit_address);
 
<------>if (nx_driver.of.status == NX_OKAY) {
<------><------>NX_DEBUGFS_FINI(&nx_driver);
 
<------><------>nx_unregister_shash(&nx_shash_aes_xcbc_alg,
<------><------><------><------>    NX_FC_AES, NX_MODE_AES_XCBC_MAC, -1);
<------><------>nx_unregister_shash(&nx_shash_sha512_alg,
<------><------><------><------>    NX_FC_SHA, NX_MODE_SHA, NX_PROPS_SHA256);
<------><------>nx_unregister_shash(&nx_shash_sha256_alg,
<------><------><------><------>    NX_FC_SHA, NX_MODE_SHA, NX_PROPS_SHA512);
<------><------>nx_unregister_aead(&nx_ccm4309_aes_alg,
<------><------><------><------>   NX_FC_AES, NX_MODE_AES_CCM);
<------><------>nx_unregister_aead(&nx_ccm_aes_alg, NX_FC_AES, NX_MODE_AES_CCM);
<------><------>nx_unregister_aead(&nx_gcm4106_aes_alg,
<------><------><------><------>   NX_FC_AES, NX_MODE_AES_GCM);
<------><------>nx_unregister_aead(&nx_gcm_aes_alg,
<------><------><------><------>   NX_FC_AES, NX_MODE_AES_GCM);
<------><------>nx_unregister_skcipher(&nx_ctr3686_aes_alg,
<------><------><------><------>       NX_FC_AES, NX_MODE_AES_CTR);
<------><------>nx_unregister_skcipher(&nx_cbc_aes_alg, NX_FC_AES,
<------><------><------><------>       NX_MODE_AES_CBC);
<------><------>nx_unregister_skcipher(&nx_ecb_aes_alg, NX_FC_AES,
<------><------><------><------>       NX_MODE_AES_ECB);
<------>}
 
<------>return 0;
}
 
 
/* module wide initialization/cleanup */
static int __init nx_init(void)
{
<------>return vio_register_driver(&nx_driver.viodriver);
}
 
static void __exit nx_fini(void)
{
<------>vio_unregister_driver(&nx_driver.viodriver);
}
 
static const struct vio_device_id nx_crypto_driver_ids[] = {
<------>{ "ibm,sym-encryption-v1", "ibm,sym-encryption" },
<------>{ "", "" }
};
MODULE_DEVICE_TABLE(vio, nx_crypto_driver_ids);
 
/* driver state structure */
struct nx_crypto_driver nx_driver = {
<------>.viodriver = {
<------><------>.id_table = nx_crypto_driver_ids,
<------><------>.probe = nx_probe,
<------><------>.remove = nx_remove,
<------><------>.name  = NX_NAME,
<------>},
};
 
module_init(nx_init);
module_exit(nx_fini);
 
MODULE_AUTHOR("Kent Yoder <yoder1@us.ibm.com>");
MODULE_DESCRIPTION(NX_STRING);
MODULE_LICENSE("GPL");
MODULE_VERSION(NX_VERSION);