--- /dev/null
+/* n2_core.c: Niagara2 Stream Processing Unit (SPU) crypto support.
+ *
+ * Copyright (C) 2010 David S. Miller <davem@davemloft.net>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/cpumask.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/crypto.h>
+#include <crypto/md5.h>
+#include <crypto/sha.h>
+#include <crypto/aes.h>
+#include <crypto/des.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+
+#include <crypto/internal/hash.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/algapi.h>
+
+#include <asm/hypervisor.h>
+#include <asm/mdesc.h>
+
+#include "n2_core.h"
+
+#define DRV_MODULE_NAME "n2_crypto"
+#define DRV_MODULE_VERSION "0.1"
+#define DRV_MODULE_RELDATE "April 29, 2010"
+
+static char version[] __devinitdata =
+ DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
+
+MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
+MODULE_DESCRIPTION("Niagara2 Crypto driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_MODULE_VERSION);
+
+#define N2_CRA_PRIORITY 300
+
+static DEFINE_MUTEX(spu_lock);
+
+struct spu_queue {
+ cpumask_t sharing;
+ unsigned long qhandle;
+
+ spinlock_t lock;
+ u8 q_type;
+ void *q;
+ unsigned long head;
+ unsigned long tail;
+ struct list_head jobs;
+
+ unsigned long devino;
+
+ char irq_name[32];
+ unsigned int irq;
+
+ struct list_head list;
+};
+
+static struct spu_queue **cpu_to_cwq;
+static struct spu_queue **cpu_to_mau;
+
+static unsigned long spu_next_offset(struct spu_queue *q, unsigned long off)
+{
+ if (q->q_type == HV_NCS_QTYPE_MAU) {
+ off += MAU_ENTRY_SIZE;
+ if (off == (MAU_ENTRY_SIZE * MAU_NUM_ENTRIES))
+ off = 0;
+ } else {
+ off += CWQ_ENTRY_SIZE;
+ if (off == (CWQ_ENTRY_SIZE * CWQ_NUM_ENTRIES))
+ off = 0;
+ }
+ return off;
+}
+
+struct n2_request_common {
+ struct list_head entry;
+ unsigned int offset;
+};
+#define OFFSET_NOT_RUNNING (~(unsigned int)0)
+
+/* An async job request records the final tail value it used in
+ * n2_request_common->offset, test to see if that offset is in
+ * the range old_head, new_head, inclusive.
+ */
+static inline bool job_finished(struct spu_queue *q, unsigned int offset,
+ unsigned long old_head, unsigned long new_head)
+{
+ if (old_head <= new_head) {
+ if (offset > old_head && offset <= new_head)
+ return true;
+ } else {
+ if (offset > old_head || offset <= new_head)
+ return true;
+ }
+ return false;
+}
+
+/* When the HEAD marker is unequal to the actual HEAD, we get
+ * a virtual device INO interrupt. We should process the
+ * completed CWQ entries and adjust the HEAD marker to clear
+ * the IRQ.
+ */
+static irqreturn_t cwq_intr(int irq, void *dev_id)
+{
+ unsigned long off, new_head, hv_ret;
+ struct spu_queue *q = dev_id;
+
+ pr_err("CPU[%d]: Got CWQ interrupt for qhdl[%lx]\n",
+ smp_processor_id(), q->qhandle);
+
+ spin_lock(&q->lock);
+
+ hv_ret = sun4v_ncs_gethead(q->qhandle, &new_head);
+
+ pr_err("CPU[%d]: CWQ gethead[%lx] hv_ret[%lu]\n",
+ smp_processor_id(), new_head, hv_ret);
+
+ for (off = q->head; off != new_head; off = spu_next_offset(q, off)) {
+ /* XXX ... XXX */
+ }
+
+ hv_ret = sun4v_ncs_sethead_marker(q->qhandle, new_head);
+ if (hv_ret == HV_EOK)
+ q->head = new_head;
+
+ spin_unlock(&q->lock);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mau_intr(int irq, void *dev_id)
+{
+ struct spu_queue *q = dev_id;
+ unsigned long head, hv_ret;
+
+ spin_lock(&q->lock);
+
+ pr_err("CPU[%d]: Got MAU interrupt for qhdl[%lx]\n",
+ smp_processor_id(), q->qhandle);
+
+ hv_ret = sun4v_ncs_gethead(q->qhandle, &head);
+
+ pr_err("CPU[%d]: MAU gethead[%lx] hv_ret[%lu]\n",
+ smp_processor_id(), head, hv_ret);
+
+ sun4v_ncs_sethead_marker(q->qhandle, head);
+
+ spin_unlock(&q->lock);
+
+ return IRQ_HANDLED;
+}
+
+static void *spu_queue_next(struct spu_queue *q, void *cur)
+{
+ return q->q + spu_next_offset(q, cur - q->q);
+}
+
+static int spu_queue_num_free(struct spu_queue *q)
+{
+ unsigned long head = q->head;
+ unsigned long tail = q->tail;
+ unsigned long end = (CWQ_ENTRY_SIZE * CWQ_NUM_ENTRIES);
+ unsigned long diff;
+
+ if (head > tail)
+ diff = head - tail;
+ else
+ diff = (end - tail) + head;
+
+ return (diff / CWQ_ENTRY_SIZE) - 1;
+}
+
+static void *spu_queue_alloc(struct spu_queue *q, int num_entries)
+{
+ int avail = spu_queue_num_free(q);
+
+ if (avail >= num_entries)
+ return q->q + q->tail;
+
+ return NULL;
+}
+
+static unsigned long spu_queue_submit(struct spu_queue *q, void *last)
+{
+ unsigned long hv_ret, new_tail;
+
+ new_tail = spu_next_offset(q, last - q->q);
+
+ hv_ret = sun4v_ncs_settail(q->qhandle, new_tail);
+ if (hv_ret == HV_EOK)
+ q->tail = new_tail;
+ return hv_ret;
+}
+
+static u64 control_word_base(unsigned int len, unsigned int hmac_key_len,
+ int enc_type, int auth_type,
+ unsigned int hash_len,
+ bool sfas, bool sob, bool eob, bool encrypt,
+ int opcode)
+{
+ u64 word = (len - 1) & CONTROL_LEN;
+
+ word |= ((u64) opcode << CONTROL_OPCODE_SHIFT);
+ word |= ((u64) enc_type << CONTROL_ENC_TYPE_SHIFT);
+ word |= ((u64) auth_type << CONTROL_AUTH_TYPE_SHIFT);
+ if (sfas)
+ word |= CONTROL_STORE_FINAL_AUTH_STATE;
+ if (sob)
+ word |= CONTROL_START_OF_BLOCK;
+ if (eob)
+ word |= CONTROL_END_OF_BLOCK;
+ if (encrypt)
+ word |= CONTROL_ENCRYPT;
+ if (hmac_key_len)
+ word |= ((u64) (hmac_key_len - 1)) << CONTROL_HMAC_KEY_LEN_SHIFT;
+ if (hash_len)
+ word |= ((u64) (hash_len - 1)) << CONTROL_HASH_LEN_SHIFT;
+
+ return word;
+}
+
+#if 0
+static inline bool n2_should_run_async(struct spu_queue *qp, int this_len)
+{
+ if (this_len >= 64 ||
+ qp->head != qp->tail)
+ return true;
+ return false;
+}
+#endif
+
+struct n2_base_ctx {
+ struct list_head list;
+};
+
+static void n2_base_ctx_init(struct n2_base_ctx *ctx)
+{
+ INIT_LIST_HEAD(&ctx->list);
+}
+
+struct n2_hash_ctx {
+ struct n2_base_ctx base;
+
+ struct crypto_ahash *fallback;
+
+ /* These next three members must match the layout created by
+ * crypto_init_shash_ops_async. This allows us to properly
+ * plumb requests we can't do in hardware down to the fallback
+ * operation, providing all of the data structures and layouts
+ * expected by those paths.
+ */
+ struct ahash_request fallback_req;
+ struct shash_desc fallback_desc;
+ union {
+ struct md5_state md5;
+ struct sha1_state sha1;
+ struct sha256_state sha256;
+ } u;
+
+ unsigned char hash_key[64];
+ unsigned char keyed_zero_hash[32];
+};
+
+static int n2_hash_async_init(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+
+ ctx->fallback_req.base.tfm = crypto_ahash_tfm(ctx->fallback);
+ ctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ return crypto_ahash_init(&ctx->fallback_req);
+}
+
+static int n2_hash_async_update(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+
+ ctx->fallback_req.base.tfm = crypto_ahash_tfm(ctx->fallback);
+ ctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
+ ctx->fallback_req.nbytes = req->nbytes;
+ ctx->fallback_req.src = req->src;
+
+ return crypto_ahash_update(&ctx->fallback_req);
+}
+
+static int n2_hash_async_final(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+
+ ctx->fallback_req.base.tfm = crypto_ahash_tfm(ctx->fallback);
+ ctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
+ ctx->fallback_req.result = req->result;
+
+ return crypto_ahash_final(&ctx->fallback_req);
+}
+
+static int n2_hash_async_finup(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+
+ ctx->fallback_req.base.tfm = crypto_ahash_tfm(ctx->fallback);
+ ctx->fallback_req.base.flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
+ ctx->fallback_req.nbytes = req->nbytes;
+ ctx->fallback_req.src = req->src;
+ ctx->fallback_req.result = req->result;
+
+ return crypto_ahash_finup(&ctx->fallback_req);
+}
+
+static int n2_hash_cra_init(struct crypto_tfm *tfm)
+{
+ const char *fallback_driver_name = tfm->__crt_alg->cra_name;
+ struct crypto_ahash *ahash = __crypto_ahash_cast(tfm);
+ struct n2_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+ struct crypto_ahash *fallback_tfm;
+ int err;
+
+ fallback_tfm = crypto_alloc_ahash(fallback_driver_name, 0,
+ CRYPTO_ALG_NEED_FALLBACK);
+ if (IS_ERR(fallback_tfm)) {
+ pr_warning("Fallback driver '%s' could not be loaded!\n",
+ fallback_driver_name);
+ err = PTR_ERR(fallback_tfm);
+ goto out;
+ }
+
+ ctx->fallback = fallback_tfm;
+ return 0;
+
+out:
+ return err;
+}
+
+static void n2_hash_cra_exit(struct crypto_tfm *tfm)
+{
+ struct crypto_ahash *ahash = __crypto_ahash_cast(tfm);
+ struct n2_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+
+ crypto_free_ahash(ctx->fallback);
+}
+
+static unsigned long wait_for_tail(struct spu_queue *qp)
+{
+ unsigned long head, hv_ret;
+
+ do {
+ hv_ret = sun4v_ncs_gethead(qp->qhandle, &head);
+ if (hv_ret != HV_EOK) {
+ pr_err("Hypervisor error on gethead\n");
+ break;
+ }
+ if (head == qp->tail) {
+ qp->head = head;
+ break;
+ }
+ } while (1);
+ return hv_ret;
+}
+
+static unsigned long submit_and_wait_for_tail(struct spu_queue *qp,
+ struct cwq_initial_entry *ent)
+{
+ unsigned long hv_ret = spu_queue_submit(qp, ent);
+
+ if (hv_ret == HV_EOK)
+ hv_ret = wait_for_tail(qp);
+
+ return hv_ret;
+}
+
+static int n2_hash_async_digest(struct ahash_request *req,
+ unsigned int auth_type, unsigned int digest_size,
+ unsigned int result_size, void *hash_loc)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ struct cwq_initial_entry *ent;
+ struct crypto_hash_walk walk;
+ struct spu_queue *qp;
+ unsigned long flags;
+ int err = -ENODEV;
+ int nbytes, cpu;
+
+ /* The total effective length of the operation may not
+ * exceed 2^16.
+ */
+ if (unlikely(req->nbytes > (1 << 16))) {
+ ctx->fallback_req.base.tfm = crypto_ahash_tfm(ctx->fallback);
+ ctx->fallback_req.base.flags =
+ req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
+ ctx->fallback_req.nbytes = req->nbytes;
+ ctx->fallback_req.src = req->src;
+ ctx->fallback_req.result = req->result;
+
+ return crypto_ahash_digest(&ctx->fallback_req);
+ }
+
+ n2_base_ctx_init(&ctx->base);
+
+ nbytes = crypto_hash_walk_first(req, &walk);
+
+ cpu = get_cpu();
+ qp = cpu_to_cwq[cpu];
+ if (!qp)
+ goto out;
+
+ spin_lock_irqsave(&qp->lock, flags);
+
+ /* XXX can do better, improve this later by doing a by-hand scatterlist
+ * XXX walk, etc.
+ */
+ ent = qp->q + qp->tail;
+
+ ent->control = control_word_base(nbytes, 0, 0,
+ auth_type, digest_size,
+ false, true, false, false,
+ OPCODE_INPLACE_BIT |
+ OPCODE_AUTH_MAC);
+ ent->src_addr = __pa(walk.data);
+ ent->auth_key_addr = 0UL;
+ ent->auth_iv_addr = __pa(hash_loc);
+ ent->final_auth_state_addr = 0UL;
+ ent->enc_key_addr = 0UL;
+ ent->enc_iv_addr = 0UL;
+ ent->dest_addr = __pa(hash_loc);
+
+ nbytes = crypto_hash_walk_done(&walk, 0);
+ while (nbytes > 0) {
+ ent = spu_queue_next(qp, ent);
+
+ ent->control = (nbytes - 1);
+ ent->src_addr = __pa(walk.data);
+ ent->auth_key_addr = 0UL;
+ ent->auth_iv_addr = 0UL;
+ ent->final_auth_state_addr = 0UL;
+ ent->enc_key_addr = 0UL;
+ ent->enc_iv_addr = 0UL;
+ ent->dest_addr = 0UL;
+
+ nbytes = crypto_hash_walk_done(&walk, 0);
+ }
+ ent->control |= CONTROL_END_OF_BLOCK;
+
+ if (submit_and_wait_for_tail(qp, ent) != HV_EOK)
+ err = -EINVAL;
+ else
+ err = 0;
+
+ spin_unlock_irqrestore(&qp->lock, flags);
+
+ if (!err)
+ memcpy(req->result, hash_loc, result_size);
+out:
+ put_cpu();
+
+ return err;
+}
+
+static int n2_md5_async_digest(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ struct md5_state *m = &ctx->u.md5;
+
+ if (unlikely(req->nbytes == 0)) {
+ static const char md5_zero[MD5_DIGEST_SIZE] = {
+ 0xd4, 0x1d, 0x8c, 0xd9, 0x8f, 0x00, 0xb2, 0x04,
+ 0xe9, 0x80, 0x09, 0x98, 0xec, 0xf8, 0x42, 0x7e,
+ };
+
+ memcpy(req->result, md5_zero, MD5_DIGEST_SIZE);
+ return 0;
+ }
+ m->hash[0] = cpu_to_le32(0x67452301);
+ m->hash[1] = cpu_to_le32(0xefcdab89);
+ m->hash[2] = cpu_to_le32(0x98badcfe);
+ m->hash[3] = cpu_to_le32(0x10325476);
+
+ return n2_hash_async_digest(req, AUTH_TYPE_MD5,
+ MD5_DIGEST_SIZE, MD5_DIGEST_SIZE,
+ m->hash);
+}
+
+static int n2_sha1_async_digest(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ struct sha1_state *s = &ctx->u.sha1;
+
+ if (unlikely(req->nbytes == 0)) {
+ static const char sha1_zero[SHA1_DIGEST_SIZE] = {
+ 0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d, 0x32,
+ 0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90, 0xaf, 0xd8,
+ 0x07, 0x09
+ };
+
+ memcpy(req->result, sha1_zero, SHA1_DIGEST_SIZE);
+ return 0;
+ }
+ s->state[0] = SHA1_H0;
+ s->state[1] = SHA1_H1;
+ s->state[2] = SHA1_H2;
+ s->state[3] = SHA1_H3;
+ s->state[4] = SHA1_H4;
+
+ return n2_hash_async_digest(req, AUTH_TYPE_SHA1,
+ SHA1_DIGEST_SIZE, SHA1_DIGEST_SIZE,
+ s->state);
+}
+
+static int n2_sha256_async_digest(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ struct sha256_state *s = &ctx->u.sha256;
+
+ if (req->nbytes == 0) {
+ static const char sha256_zero[SHA256_DIGEST_SIZE] = {
+ 0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, 0x9a,
+ 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24, 0x27, 0xae,
+ 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c, 0xa4, 0x95, 0x99,
+ 0x1b, 0x78, 0x52, 0xb8, 0x55
+ };
+
+ memcpy(req->result, sha256_zero, SHA256_DIGEST_SIZE);
+ return 0;
+ }
+ s->state[0] = SHA256_H0;
+ s->state[1] = SHA256_H1;
+ s->state[2] = SHA256_H2;
+ s->state[3] = SHA256_H3;
+ s->state[4] = SHA256_H4;
+ s->state[5] = SHA256_H5;
+ s->state[6] = SHA256_H6;
+ s->state[7] = SHA256_H7;
+
+ return n2_hash_async_digest(req, AUTH_TYPE_SHA256,
+ SHA256_DIGEST_SIZE, SHA256_DIGEST_SIZE,
+ s->state);
+}
+
+static int n2_sha224_async_digest(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct n2_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ struct sha256_state *s = &ctx->u.sha256;
+
+ if (req->nbytes == 0) {
+ static const char sha224_zero[SHA224_DIGEST_SIZE] = {
+ 0xd1, 0x4a, 0x02, 0x8c, 0x2a, 0x3a, 0x2b, 0xc9, 0x47,
+ 0x61, 0x02, 0xbb, 0x28, 0x82, 0x34, 0xc4, 0x15, 0xa2,
+ 0xb0, 0x1f, 0x82, 0x8e, 0xa6, 0x2a, 0xc5, 0xb3, 0xe4,
+ 0x2f
+ };
+
+ memcpy(req->result, sha224_zero, SHA224_DIGEST_SIZE);
+ return 0;
+ }
+ s->state[0] = SHA224_H0;
+ s->state[1] = SHA224_H1;
+ s->state[2] = SHA224_H2;
+ s->state[3] = SHA224_H3;
+ s->state[4] = SHA224_H4;
+ s->state[5] = SHA224_H5;
+ s->state[6] = SHA224_H6;
+ s->state[7] = SHA224_H7;
+
+ return n2_hash_async_digest(req, AUTH_TYPE_SHA256,
+ SHA256_DIGEST_SIZE, SHA224_DIGEST_SIZE,
+ s->state);
+}
+
+struct n2_cipher_context {
+ int key_len;
+ int enc_type;
+ union {
+ u8 aes[AES_MAX_KEY_SIZE];
+ u8 des[DES_KEY_SIZE];
+ u8 des3[3 * DES_KEY_SIZE];
+ u8 arc4[258]; /* S-box, X, Y */
+ } key;
+};
+
+#define N2_CHUNK_ARR_LEN 16
+
+struct n2_crypto_chunk {
+ struct list_head entry;
+ unsigned long iv_paddr : 44;
+ unsigned long arr_len : 20;
+ unsigned long dest_paddr;
+ unsigned long dest_final;
+ struct {
+ unsigned long src_paddr : 44;
+ unsigned long src_len : 20;
+ } arr[N2_CHUNK_ARR_LEN];
+};
+
+struct n2_request_context {
+ struct ablkcipher_walk walk;
+ struct list_head chunk_list;
+ struct n2_crypto_chunk chunk;
+ u8 temp_iv[16];
+};
+
+/* The SPU allows some level of flexibility for partial cipher blocks
+ * being specified in a descriptor.
+ *
+ * It merely requires that every descriptor's length field is at least
+ * as large as the cipher block size. This means that a cipher block
+ * can span at most 2 descriptors. However, this does not allow a
+ * partial block to span into the final descriptor as that would
+ * violate the rule (since every descriptor's length must be at lest
+ * the block size). So, for example, assuming an 8 byte block size:
+ *
+ * 0xe --> 0xa --> 0x8
+ *
+ * is a valid length sequence, whereas:
+ *
+ * 0xe --> 0xb --> 0x7
+ *
+ * is not a valid sequence.
+ */
+
+struct n2_cipher_alg {
+ struct list_head entry;
+ u8 enc_type;
+ struct crypto_alg alg;
+};
+
+static inline struct n2_cipher_alg *n2_cipher_alg(struct crypto_tfm *tfm)
+{
+ struct crypto_alg *alg = tfm->__crt_alg;
+
+ return container_of(alg, struct n2_cipher_alg, alg);
+}
+
+struct n2_cipher_request_context {
+ struct ablkcipher_walk walk;
+};
+
+static int n2_aes_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
+ unsigned int keylen)
+{
+ struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
+ struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
+ struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm);
+
+ ctx->enc_type = (n2alg->enc_type & ENC_TYPE_CHAINING_MASK);
+
+ switch (keylen) {
+ case AES_KEYSIZE_128:
+ ctx->enc_type |= ENC_TYPE_ALG_AES128;
+ break;
+ case AES_KEYSIZE_192:
+ ctx->enc_type |= ENC_TYPE_ALG_AES192;
+ break;
+ case AES_KEYSIZE_256:
+ ctx->enc_type |= ENC_TYPE_ALG_AES256;
+ break;
+ default:
+ crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -EINVAL;
+ }
+
+ ctx->key_len = keylen;
+ memcpy(ctx->key.aes, key, keylen);
+ return 0;
+}
+
+static int n2_des_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
+ unsigned int keylen)
+{
+ struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
+ struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
+ struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm);
+ u32 tmp[DES_EXPKEY_WORDS];
+ int err;
+
+ ctx->enc_type = n2alg->enc_type;
+
+ if (keylen != DES_KEY_SIZE) {
+ crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -EINVAL;
+ }
+
+ err = des_ekey(tmp, key);
+ if (err == 0 && (tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+ tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
+ return -EINVAL;
+ }
+
+ ctx->key_len = keylen;
+ memcpy(ctx->key.des, key, keylen);
+ return 0;
+}
+
+static int n2_3des_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
+ unsigned int keylen)
+{
+ struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
+ struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
+ struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm);
+
+ ctx->enc_type = n2alg->enc_type;
+
+ if (keylen != (3 * DES_KEY_SIZE)) {
+ crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -EINVAL;
+ }
+ ctx->key_len = keylen;
+ memcpy(ctx->key.des3, key, keylen);
+ return 0;
+}
+
+static int n2_arc4_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
+ unsigned int keylen)
+{
+ struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
+ struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
+ struct n2_cipher_alg *n2alg = n2_cipher_alg(tfm);
+ u8 *s = ctx->key.arc4;
+ u8 *x = s + 256;
+ u8 *y = x + 1;
+ int i, j, k;
+
+ ctx->enc_type = n2alg->enc_type;
+
+ j = k = 0;
+ *x = 0;
+ *y = 0;
+ for (i = 0; i < 256; i++)
+ s[i] = i;
+ for (i = 0; i < 256; i++) {
+ u8 a = s[i];
+ j = (j + key[k] + a) & 0xff;
+ s[i] = s[j];
+ s[j] = a;
+ if (++k >= keylen)
+ k = 0;
+ }
+
+ return 0;
+}
+
+static inline int cipher_descriptor_len(int nbytes, unsigned int block_size)
+{
+ int this_len = nbytes;
+
+ this_len -= (nbytes & (block_size - 1));
+ return this_len > (1 << 16) ? (1 << 16) : this_len;
+}
+
+static int __n2_crypt_chunk(struct crypto_tfm *tfm, struct n2_crypto_chunk *cp,
+ struct spu_queue *qp, bool encrypt)
+{
+ struct n2_cipher_context *ctx = crypto_tfm_ctx(tfm);
+ struct cwq_initial_entry *ent;
+ bool in_place;
+ int i;
+
+ ent = spu_queue_alloc(qp, cp->arr_len);
+ if (!ent) {
+ pr_info("queue_alloc() of %d fails\n",
+ cp->arr_len);
+ return -EBUSY;
+ }
+
+ in_place = (cp->dest_paddr == cp->arr[0].src_paddr);
+
+ ent->control = control_word_base(cp->arr[0].src_len,
+ 0, ctx->enc_type, 0, 0,
+ false, true, false, encrypt,
+ OPCODE_ENCRYPT |
+ (in_place ? OPCODE_INPLACE_BIT : 0));
+ ent->src_addr = cp->arr[0].src_paddr;
+ ent->auth_key_addr = 0UL;
+ ent->auth_iv_addr = 0UL;
+ ent->final_auth_state_addr = 0UL;
+ ent->enc_key_addr = __pa(&ctx->key);
+ ent->enc_iv_addr = cp->iv_paddr;
+ ent->dest_addr = (in_place ? 0UL : cp->dest_paddr);
+
+ for (i = 1; i < cp->arr_len; i++) {
+ ent = spu_queue_next(qp, ent);
+
+ ent->control = cp->arr[i].src_len - 1;
+ ent->src_addr = cp->arr[i].src_paddr;
+ ent->auth_key_addr = 0UL;
+ ent->auth_iv_addr = 0UL;
+ ent->final_auth_state_addr = 0UL;
+ ent->enc_key_addr = 0UL;
+ ent->enc_iv_addr = 0UL;
+ ent->dest_addr = 0UL;
+ }
+ ent->control |= CONTROL_END_OF_BLOCK;
+
+ return (spu_queue_submit(qp, ent) != HV_EOK) ? -EINVAL : 0;
+}
+
+static int n2_compute_chunks(struct ablkcipher_request *req)
+{
+ struct n2_request_context *rctx = ablkcipher_request_ctx(req);
+ struct ablkcipher_walk *walk = &rctx->walk;
+ struct n2_crypto_chunk *chunk;
+ unsigned long dest_prev;
+ unsigned int tot_len;
+ bool prev_in_place;
+ int err, nbytes;
+
+ ablkcipher_walk_init(walk, req->dst, req->src, req->nbytes);
+ err = ablkcipher_walk_phys(req, walk);
+ if (err)
+ return err;
+
+ INIT_LIST_HEAD(&rctx->chunk_list);
+
+ chunk = &rctx->chunk;
+ INIT_LIST_HEAD(&chunk->entry);
+
+ chunk->iv_paddr = 0UL;
+ chunk->arr_len = 0;
+ chunk->dest_paddr = 0UL;
+
+ prev_in_place = false;
+ dest_prev = ~0UL;
+ tot_len = 0;
+
+ while ((nbytes = walk->nbytes) != 0) {
+ unsigned long dest_paddr, src_paddr;
+ bool in_place;
+ int this_len;
+
+ src_paddr = (page_to_phys(walk->src.page) +
+ walk->src.offset);
+ dest_paddr = (page_to_phys(walk->dst.page) +
+ walk->dst.offset);
+ in_place = (src_paddr == dest_paddr);
+ this_len = cipher_descriptor_len(nbytes, walk->blocksize);
+
+ if (chunk->arr_len != 0) {
+ if (in_place != prev_in_place ||
+ (!prev_in_place &&
+ dest_paddr != dest_prev) ||
+ chunk->arr_len == N2_CHUNK_ARR_LEN ||
+ tot_len + this_len > (1 << 16)) {
+ chunk->dest_final = dest_prev;
+ list_add_tail(&chunk->entry,
+ &rctx->chunk_list);
+ chunk = kzalloc(sizeof(*chunk), GFP_ATOMIC);
+ if (!chunk) {
+ err = -ENOMEM;
+ break;
+ }
+ INIT_LIST_HEAD(&chunk->entry);
+ }
+ }
+ if (chunk->arr_len == 0) {
+ chunk->dest_paddr = dest_paddr;
+ tot_len = 0;
+ }
+ chunk->arr[chunk->arr_len].src_paddr = src_paddr;
+ chunk->arr[chunk->arr_len].src_len = this_len;
+ chunk->arr_len++;
+
+ dest_prev = dest_paddr + this_len;
+ prev_in_place = in_place;
+ tot_len += this_len;
+
+ err = ablkcipher_walk_done(req, walk, nbytes - this_len);
+ if (err)
+ break;
+ }
+ if (!err && chunk->arr_len != 0) {
+ chunk->dest_final = dest_prev;
+ list_add_tail(&chunk->entry, &rctx->chunk_list);
+ }
+
+ return err;
+}
+
+static void n2_chunk_complete(struct ablkcipher_request *req, void *final_iv)
+{
+ struct n2_request_context *rctx = ablkcipher_request_ctx(req);
+ struct n2_crypto_chunk *c, *tmp;
+
+ if (final_iv)
+ memcpy(rctx->walk.iv, final_iv, rctx->walk.blocksize);
+
+ ablkcipher_walk_complete(&rctx->walk);
+ list_for_each_entry_safe(c, tmp, &rctx->chunk_list, entry) {
+ list_del(&c->entry);
+ if (unlikely(c != &rctx->chunk))
+ kfree(c);
+ }
+
+}
+
+static int n2_do_ecb(struct ablkcipher_request *req, bool encrypt)
+{
+ struct n2_request_context *rctx = ablkcipher_request_ctx(req);
+ struct crypto_tfm *tfm = req->base.tfm;
+ int err = n2_compute_chunks(req);
+ struct n2_crypto_chunk *c, *tmp;
+ unsigned long flags, hv_ret;
+ struct spu_queue *qp;
+
+ if (err)
+ return err;
+
+ qp = cpu_to_cwq[get_cpu()];
+ err = -ENODEV;
+ if (!qp)
+ goto out;
+
+ spin_lock_irqsave(&qp->lock, flags);
+
+ list_for_each_entry_safe(c, tmp, &rctx->chunk_list, entry) {
+ err = __n2_crypt_chunk(tfm, c, qp, encrypt);
+ if (err)
+ break;
+ list_del(&c->entry);
+ if (unlikely(c != &rctx->chunk))
+ kfree(c);
+ }
+ if (!err) {
+ hv_ret = wait_for_tail(qp);
+ if (hv_ret != HV_EOK)
+ err = -EINVAL;
+ }
+
+ spin_unlock_irqrestore(&qp->lock, flags);
+
+ put_cpu();
+
+out:
+ n2_chunk_complete(req, NULL);
+ return err;
+}
+
+static int n2_encrypt_ecb(struct ablkcipher_request *req)
+{
+ return n2_do_ecb(req, true);
+}
+
+static int n2_decrypt_ecb(struct ablkcipher_request *req)
+{
+ return n2_do_ecb(req, false);
+}
+
+static int n2_do_chaining(struct ablkcipher_request *req, bool encrypt)
+{
+ struct n2_request_context *rctx = ablkcipher_request_ctx(req);
+ struct crypto_tfm *tfm = req->base.tfm;
+ unsigned long flags, hv_ret, iv_paddr;
+ int err = n2_compute_chunks(req);
+ struct n2_crypto_chunk *c, *tmp;
+ struct spu_queue *qp;
+ void *final_iv_addr;
+
+ final_iv_addr = NULL;
+
+ if (err)
+ return err;
+
+ qp = cpu_to_cwq[get_cpu()];
+ err = -ENODEV;
+ if (!qp)
+ goto out;
+
+ spin_lock_irqsave(&qp->lock, flags);
+
+ if (encrypt) {
+ iv_paddr = __pa(rctx->walk.iv);
+ list_for_each_entry_safe(c, tmp, &rctx->chunk_list,
+ entry) {
+ c->iv_paddr = iv_paddr;
+ err = __n2_crypt_chunk(tfm, c, qp, true);
+ if (err)
+ break;
+ iv_paddr = c->dest_final - rctx->walk.blocksize;
+ list_del(&c->entry);
+ if (unlikely(c != &rctx->chunk))
+ kfree(c);
+ }
+ final_iv_addr = __va(iv_paddr);
+ } else {
+ list_for_each_entry_safe_reverse(c, tmp, &rctx->chunk_list,
+ entry) {
+ if (c == &rctx->chunk) {
+ iv_paddr = __pa(rctx->walk.iv);
+ } else {
+ iv_paddr = (tmp->arr[tmp->arr_len-1].src_paddr +
+ tmp->arr[tmp->arr_len-1].src_len -
+ rctx->walk.blocksize);
+ }
+ if (!final_iv_addr) {
+ unsigned long pa;
+
+ pa = (c->arr[c->arr_len-1].src_paddr +
+ c->arr[c->arr_len-1].src_len -
+ rctx->walk.blocksize);
+ final_iv_addr = rctx->temp_iv;
+ memcpy(rctx->temp_iv, __va(pa),
+ rctx->walk.blocksize);
+ }
+ c->iv_paddr = iv_paddr;
+ err = __n2_crypt_chunk(tfm, c, qp, false);
+ if (err)
+ break;
+ list_del(&c->entry);
+ if (unlikely(c != &rctx->chunk))
+ kfree(c);
+ }
+ }
+ if (!err) {
+ hv_ret = wait_for_tail(qp);
+ if (hv_ret != HV_EOK)
+ err = -EINVAL;
+ }
+
+ spin_unlock_irqrestore(&qp->lock, flags);
+
+ put_cpu();
+
+out:
+ n2_chunk_complete(req, err ? NULL : final_iv_addr);
+ return err;
+}
+
+static int n2_encrypt_chaining(struct ablkcipher_request *req)
+{
+ return n2_do_chaining(req, true);
+}
+
+static int n2_decrypt_chaining(struct ablkcipher_request *req)
+{
+ return n2_do_chaining(req, false);
+}
+
+struct n2_cipher_tmpl {
+ const char *name;
+ const char *drv_name;
+ u8 block_size;
+ u8 enc_type;
+ struct ablkcipher_alg ablkcipher;
+};
+
+static const struct n2_cipher_tmpl cipher_tmpls[] = {
+ /* ARC4: only ECB is supported (chaining bits ignored) */
+ { .name = "ecb(arc4)",
+ .drv_name = "ecb-arc4",
+ .block_size = 1,
+ .enc_type = (ENC_TYPE_ALG_RC4_STREAM |
+ ENC_TYPE_CHAINING_ECB),
+ .ablkcipher = {
+ .min_keysize = 1,
+ .max_keysize = 256,
+ .setkey = n2_arc4_setkey,
+ .encrypt = n2_encrypt_ecb,
+ .decrypt = n2_decrypt_ecb,
+ },
+ },
+
+ /* DES: ECB CBC and CFB are supported */
+ { .name = "ecb(des)",
+ .drv_name = "ecb-des",
+ .block_size = DES_BLOCK_SIZE,
+ .enc_type = (ENC_TYPE_ALG_DES |
+ ENC_TYPE_CHAINING_ECB),
+ .ablkcipher = {
+ .min_keysize = DES_KEY_SIZE,
+ .max_keysize = DES_KEY_SIZE,
+ .setkey = n2_des_setkey,
+ .encrypt = n2_encrypt_ecb,
+ .decrypt = n2_decrypt_ecb,
+ },
+ },
+ { .name = "cbc(des)",
+ .drv_name = "cbc-des",
+ .block_size = DES_BLOCK_SIZE,
+ .enc_type = (ENC_TYPE_ALG_DES |
+ ENC_TYPE_CHAINING_CBC),
+ .ablkcipher = {
+ .ivsize = DES_BLOCK_SIZE,
+ .min_keysize = DES_KEY_SIZE,
+ .max_keysize = DES_KEY_SIZE,
+ .setkey = n2_des_setkey,
+ .encrypt = n2_encrypt_chaining,
+ .decrypt = n2_decrypt_chaining,
+ },
+ },
+ { .name = "cfb(des)",
+ .drv_name = "cfb-des",
+ .block_size = DES_BLOCK_SIZE,
+ .enc_type = (ENC_TYPE_ALG_DES |
+ ENC_TYPE_CHAINING_CFB),
+ .ablkcipher = {
+ .min_keysize = DES_KEY_SIZE,
+ .max_keysize = DES_KEY_SIZE,
+ .setkey = n2_des_setkey,
+ .encrypt = n2_encrypt_chaining,
+ .decrypt = n2_decrypt_chaining,
+ },
+ },
+
+ /* 3DES: ECB CBC and CFB are supported */
+ { .name = "ecb(des3_ede)",
+ .drv_name = "ecb-3des",
+ .block_size = DES_BLOCK_SIZE,
+ .enc_type = (ENC_TYPE_ALG_3DES |
+ ENC_TYPE_CHAINING_ECB),
+ .ablkcipher = {
+ .min_keysize = 3 * DES_KEY_SIZE,
+ .max_keysize = 3 * DES_KEY_SIZE,
+ .setkey = n2_3des_setkey,
+ .encrypt = n2_encrypt_ecb,
+ .decrypt = n2_decrypt_ecb,
+ },
+ },
+ { .name = "cbc(des3_ede)",
+ .drv_name = "cbc-3des",
+ .block_size = DES_BLOCK_SIZE,
+ .enc_type = (ENC_TYPE_ALG_3DES |
+ ENC_TYPE_CHAINING_CBC),
+ .ablkcipher = {
+ .ivsize = DES_BLOCK_SIZE,
+ .min_keysize = 3 * DES_KEY_SIZE,
+ .max_keysize = 3 * DES_KEY_SIZE,
+ .setkey = n2_3des_setkey,
+ .encrypt = n2_encrypt_chaining,
+ .decrypt = n2_decrypt_chaining,
+ },
+ },
+ { .name = "cfb(des3_ede)",
+ .drv_name = "cfb-3des",
+ .block_size = DES_BLOCK_SIZE,
+ .enc_type = (ENC_TYPE_ALG_3DES |
+ ENC_TYPE_CHAINING_CFB),
+ .ablkcipher = {
+ .min_keysize = 3 * DES_KEY_SIZE,
+ .max_keysize = 3 * DES_KEY_SIZE,
+ .setkey = n2_3des_setkey,
+ .encrypt = n2_encrypt_chaining,
+ .decrypt = n2_decrypt_chaining,
+ },
+ },
+ /* AES: ECB CBC and CTR are supported */
+ { .name = "ecb(aes)",
+ .drv_name = "ecb-aes",
+ .block_size = AES_BLOCK_SIZE,
+ .enc_type = (ENC_TYPE_ALG_AES128 |
+ ENC_TYPE_CHAINING_ECB),
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = n2_aes_setkey,
+ .encrypt = n2_encrypt_ecb,
+ .decrypt = n2_decrypt_ecb,
+ },
+ },
+ { .name = "cbc(aes)",
+ .drv_name = "cbc-aes",
+ .block_size = AES_BLOCK_SIZE,
+ .enc_type = (ENC_TYPE_ALG_AES128 |
+ ENC_TYPE_CHAINING_CBC),
+ .ablkcipher = {
+ .ivsize = AES_BLOCK_SIZE,
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = n2_aes_setkey,
+ .encrypt = n2_encrypt_chaining,
+ .decrypt = n2_decrypt_chaining,
+ },
+ },
+ { .name = "ctr(aes)",
+ .drv_name = "ctr-aes",
+ .block_size = AES_BLOCK_SIZE,
+ .enc_type = (ENC_TYPE_ALG_AES128 |
+ ENC_TYPE_CHAINING_COUNTER),
+ .ablkcipher = {
+ .ivsize = AES_BLOCK_SIZE,
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = n2_aes_setkey,
+ .encrypt = n2_encrypt_chaining,
+ .decrypt = n2_encrypt_chaining,
+ },
+ },
+
+};
+#define NUM_CIPHER_TMPLS ARRAY_SIZE(cipher_tmpls)
+
+static LIST_HEAD(cipher_algs);
+
+struct n2_hash_tmpl {
+ const char *name;
+ int (*digest)(struct ahash_request *req);
+ u8 digest_size;
+ u8 block_size;
+};
+static const struct n2_hash_tmpl hash_tmpls[] = {
+ { .name = "md5",
+ .digest = n2_md5_async_digest,
+ .digest_size = MD5_DIGEST_SIZE,
+ .block_size = MD5_HMAC_BLOCK_SIZE },
+ { .name = "sha1",
+ .digest = n2_sha1_async_digest,
+ .digest_size = SHA1_DIGEST_SIZE,
+ .block_size = SHA1_BLOCK_SIZE },
+ { .name = "sha256",
+ .digest = n2_sha256_async_digest,
+ .digest_size = SHA256_DIGEST_SIZE,
+ .block_size = SHA256_BLOCK_SIZE },
+ { .name = "sha224",
+ .digest = n2_sha224_async_digest,
+ .digest_size = SHA224_DIGEST_SIZE,
+ .block_size = SHA224_BLOCK_SIZE },
+};
+#define NUM_HASH_TMPLS ARRAY_SIZE(hash_tmpls)
+
+struct n2_ahash_alg {
+ struct list_head entry;
+ struct ahash_alg alg;
+};
+static LIST_HEAD(ahash_algs);
+
+static int algs_registered;
+
+static void __n2_unregister_algs(void)
+{
+ struct n2_cipher_alg *cipher, *cipher_tmp;
+ struct n2_ahash_alg *alg, *alg_tmp;
+
+ list_for_each_entry_safe(cipher, cipher_tmp, &cipher_algs, entry) {
+ crypto_unregister_alg(&cipher->alg);
+ list_del(&cipher->entry);
+ kfree(cipher);
+ }
+ list_for_each_entry_safe(alg, alg_tmp, &ahash_algs, entry) {
+ crypto_unregister_ahash(&alg->alg);
+ list_del(&alg->entry);
+ kfree(alg);
+ }
+}
+
+static int n2_cipher_cra_init(struct crypto_tfm *tfm)
+{
+ tfm->crt_ablkcipher.reqsize = sizeof(struct n2_request_context);
+ return 0;
+}
+
+static int __devinit __n2_register_one_cipher(const struct n2_cipher_tmpl *tmpl)
+{
+ struct n2_cipher_alg *p = kzalloc(sizeof(*p), GFP_KERNEL);
+ struct crypto_alg *alg;
+ int err;
+
+ if (!p)
+ return -ENOMEM;
+
+ alg = &p->alg;
+
+ snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", tmpl->name);
+ snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s-n2", tmpl->drv_name);
+ alg->cra_priority = N2_CRA_PRIORITY;
+ alg->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
+ alg->cra_blocksize = tmpl->block_size;
+ p->enc_type = tmpl->enc_type;
+ alg->cra_ctxsize = sizeof(struct n2_cipher_context);
+ alg->cra_type = &crypto_ablkcipher_type;
+ alg->cra_u.ablkcipher = tmpl->ablkcipher;
+ alg->cra_init = n2_cipher_cra_init;
+ alg->cra_module = THIS_MODULE;
+
+ list_add(&p->entry, &cipher_algs);
+ err = crypto_register_alg(alg);
+ if (err) {
+ list_del(&p->entry);
+ kfree(p);
+ }
+ return err;
+}
+
+static int __devinit __n2_register_one_ahash(const struct n2_hash_tmpl *tmpl)
+{
+ struct n2_ahash_alg *p = kzalloc(sizeof(*p), GFP_KERNEL);
+ struct hash_alg_common *halg;
+ struct crypto_alg *base;
+ struct ahash_alg *ahash;
+ int err;
+
+ if (!p)
+ return -ENOMEM;
+
+ ahash = &p->alg;
+ ahash->init = n2_hash_async_init;
+ ahash->update = n2_hash_async_update;
+ ahash->final = n2_hash_async_final;
+ ahash->finup = n2_hash_async_finup;
+ ahash->digest = tmpl->digest;
+
+ halg = &ahash->halg;
+ halg->digestsize = tmpl->digest_size;
+
+ base = &halg->base;
+ snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "%s", tmpl->name);
+ snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s-n2", tmpl->name);
+ base->cra_priority = N2_CRA_PRIORITY;
+ base->cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_NEED_FALLBACK;
+ base->cra_blocksize = tmpl->block_size;
+ base->cra_ctxsize = sizeof(struct n2_hash_ctx);
+ base->cra_module = THIS_MODULE;
+ base->cra_init = n2_hash_cra_init;
+ base->cra_exit = n2_hash_cra_exit;
+
+ list_add(&p->entry, &ahash_algs);
+ err = crypto_register_ahash(ahash);
+ if (err) {
+ list_del(&p->entry);
+ kfree(p);
+ }
+ return err;
+}
+
+static int __devinit n2_register_algs(void)
+{
+ int i, err = 0;
+
+ mutex_lock(&spu_lock);
+ if (algs_registered++)
+ goto out;
+
+ for (i = 0; i < NUM_HASH_TMPLS; i++) {
+ err = __n2_register_one_ahash(&hash_tmpls[i]);
+ if (err) {
+ __n2_unregister_algs();
+ goto out;
+ }
+ }
+ for (i = 0; i < NUM_CIPHER_TMPLS; i++) {
+ err = __n2_register_one_cipher(&cipher_tmpls[i]);
+ if (err) {
+ __n2_unregister_algs();
+ goto out;
+ }
+ }
+
+out:
+ mutex_unlock(&spu_lock);
+ return err;
+}
+
+static void __exit n2_unregister_algs(void)
+{
+ mutex_lock(&spu_lock);
+ if (!--algs_registered)
+ __n2_unregister_algs();
+ mutex_unlock(&spu_lock);
+}
+
+/* To map CWQ queues to interrupt sources, the hypervisor API provides
+ * a devino. This isn't very useful to us because all of the
+ * interrupts listed in the of_device node have been translated to
+ * Linux virtual IRQ cookie numbers.
+ *
+ * So we have to back-translate, going through the 'intr' and 'ino'
+ * property tables of the n2cp MDESC node, matching it with the OF
+ * 'interrupts' property entries, in order to to figure out which
+ * devino goes to which already-translated IRQ.
+ */
+static int find_devino_index(struct of_device *dev, struct spu_mdesc_info *ip,
+ unsigned long dev_ino)
+{
+ const unsigned int *dev_intrs;
+ unsigned int intr;
+ int i;
+
+ for (i = 0; i < ip->num_intrs; i++) {
+ if (ip->ino_table[i].ino == dev_ino)
+ break;
+ }
+ if (i == ip->num_intrs)
+ return -ENODEV;
+
+ intr = ip->ino_table[i].intr;
+
+ dev_intrs = of_get_property(dev->node, "interrupts", NULL);
+ if (!dev_intrs)
+ return -ENODEV;
+
+ for (i = 0; i < dev->num_irqs; i++) {
+ if (dev_intrs[i] == intr)
+ return i;
+ }
+
+ return -ENODEV;
+}
+
+static int spu_map_ino(struct of_device *dev, struct spu_mdesc_info *ip,
+ const char *irq_name, struct spu_queue *p,
+ irq_handler_t handler)
+{
+ unsigned long herr;
+ int index;
+
+ herr = sun4v_ncs_qhandle_to_devino(p->qhandle, &p->devino);
+ if (herr)
+ return -EINVAL;
+
+ index = find_devino_index(dev, ip, p->devino);
+ if (index < 0)
+ return index;
+
+ p->irq = dev->irqs[index];
+
+ sprintf(p->irq_name, "%s-%d", irq_name, index);
+
+ return request_irq(p->irq, handler, IRQF_SAMPLE_RANDOM,
+ p->irq_name, p);
+}
+
+static struct kmem_cache *queue_cache[2];
+
+static void *new_queue(unsigned long q_type)
+{
+ return kmem_cache_zalloc(queue_cache[q_type - 1], GFP_KERNEL);
+}
+
+static void free_queue(void *p, unsigned long q_type)
+{
+ return kmem_cache_free(queue_cache[q_type - 1], p);
+}
+
+static int queue_cache_init(void)
+{
+ if (!queue_cache[HV_NCS_QTYPE_MAU - 1])
+ queue_cache[HV_NCS_QTYPE_MAU - 1] =
+ kmem_cache_create("cwq_queue",
+ (MAU_NUM_ENTRIES *
+ MAU_ENTRY_SIZE),
+ MAU_ENTRY_SIZE, 0, NULL);
+ if (!queue_cache[HV_NCS_QTYPE_MAU - 1])
+ return -ENOMEM;
+
+ if (!queue_cache[HV_NCS_QTYPE_CWQ - 1])
+ queue_cache[HV_NCS_QTYPE_CWQ - 1] =
+ kmem_cache_create("cwq_queue",
+ (CWQ_NUM_ENTRIES *
+ CWQ_ENTRY_SIZE),
+ CWQ_ENTRY_SIZE, 0, NULL);
+ if (!queue_cache[HV_NCS_QTYPE_CWQ - 1]) {
+ kmem_cache_destroy(queue_cache[HV_NCS_QTYPE_MAU - 1]);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static void queue_cache_destroy(void)
+{
+ kmem_cache_destroy(queue_cache[HV_NCS_QTYPE_MAU - 1]);
+ kmem_cache_destroy(queue_cache[HV_NCS_QTYPE_CWQ - 1]);
+}
+
+static int spu_queue_register(struct spu_queue *p, unsigned long q_type)
+{
+ cpumask_var_t old_allowed;
+ unsigned long hv_ret;
+
+ if (cpumask_empty(&p->sharing))
+ return -EINVAL;
+
+ if (!alloc_cpumask_var(&old_allowed, GFP_KERNEL))
+ return -ENOMEM;
+
+ cpumask_copy(old_allowed, ¤t->cpus_allowed);
+
+ set_cpus_allowed_ptr(current, &p->sharing);
+
+ hv_ret = sun4v_ncs_qconf(q_type, __pa(p->q),
+ CWQ_NUM_ENTRIES, &p->qhandle);
+ if (!hv_ret)
+ sun4v_ncs_sethead_marker(p->qhandle, 0);
+
+ set_cpus_allowed_ptr(current, old_allowed);
+
+ free_cpumask_var(old_allowed);
+
+ return (hv_ret ? -EINVAL : 0);
+}
+
+static int spu_queue_setup(struct spu_queue *p)
+{
+ int err;
+
+ p->q = new_queue(p->q_type);
+ if (!p->q)
+ return -ENOMEM;
+
+ err = spu_queue_register(p, p->q_type);
+ if (err) {
+ free_queue(p->q, p->q_type);
+ p->q = NULL;
+ }
+
+ return err;
+}
+
+static void spu_queue_destroy(struct spu_queue *p)
+{
+ unsigned long hv_ret;
+
+ if (!p->q)
+ return;
+
+ hv_ret = sun4v_ncs_qconf(p->q_type, p->qhandle, 0, &p->qhandle);
+
+ if (!hv_ret)
+ free_queue(p->q, p->q_type);
+}
+
+static void spu_list_destroy(struct list_head *list)
+{
+ struct spu_queue *p, *n;
+
+ list_for_each_entry_safe(p, n, list, list) {
+ int i;
+
+ for (i = 0; i < NR_CPUS; i++) {
+ if (cpu_to_cwq[i] == p)
+ cpu_to_cwq[i] = NULL;
+ }
+
+ if (p->irq) {
+ free_irq(p->irq, p);
+ p->irq = 0;
+ }
+ spu_queue_destroy(p);
+ list_del(&p->list);
+ kfree(p);
+ }
+}
+
+/* Walk the backward arcs of a CWQ 'exec-unit' node,
+ * gathering cpu membership information.
+ */
+static int spu_mdesc_walk_arcs(struct mdesc_handle *mdesc,
+ struct of_device *dev,
+ u64 node, struct spu_queue *p,
+ struct spu_queue **table)
+{
+ u64 arc;
+
+ mdesc_for_each_arc(arc, mdesc, node, MDESC_ARC_TYPE_BACK) {
+ u64 tgt = mdesc_arc_target(mdesc, arc);
+ const char *name = mdesc_node_name(mdesc, tgt);
+ const u64 *id;
+
+ if (strcmp(name, "cpu"))
+ continue;
+ id = mdesc_get_property(mdesc, tgt, "id", NULL);
+ if (table[*id] != NULL) {
+ dev_err(&dev->dev, "%s: SPU cpu slot already set.\n",
+ dev->node->full_name);
+ return -EINVAL;
+ }
+ cpu_set(*id, p->sharing);
+ table[*id] = p;
+ }
+ return 0;
+}
+
+/* Process an 'exec-unit' MDESC node of type 'cwq'. */
+static int handle_exec_unit(struct spu_mdesc_info *ip, struct list_head *list,
+ struct of_device *dev, struct mdesc_handle *mdesc,
+ u64 node, const char *iname, unsigned long q_type,
+ irq_handler_t handler, struct spu_queue **table)
+{
+ struct spu_queue *p;
+ int err;
+
+ p = kzalloc(sizeof(struct spu_queue), GFP_KERNEL);
+ if (!p) {
+ dev_err(&dev->dev, "%s: Could not allocate SPU queue.\n",
+ dev->node->full_name);
+ return -ENOMEM;
+ }
+
+ cpus_clear(p->sharing);
+ spin_lock_init(&p->lock);
+ p->q_type = q_type;
+ INIT_LIST_HEAD(&p->jobs);
+ list_add(&p->list, list);
+
+ err = spu_mdesc_walk_arcs(mdesc, dev, node, p, table);
+ if (err)
+ return err;
+
+ err = spu_queue_setup(p);
+ if (err)
+ return err;
+
+ return spu_map_ino(dev, ip, iname, p, handler);
+}
+
+static int spu_mdesc_scan(struct mdesc_handle *mdesc, struct of_device *dev,
+ struct spu_mdesc_info *ip, struct list_head *list,
+ const char *exec_name, unsigned long q_type,
+ irq_handler_t handler, struct spu_queue **table)
+{
+ int err = 0;
+ u64 node;
+
+ mdesc_for_each_node_by_name(mdesc, node, "exec-unit") {
+ const char *type;
+
+ type = mdesc_get_property(mdesc, node, "type", NULL);
+ if (!type || strcmp(type, exec_name))
+ continue;
+
+ err = handle_exec_unit(ip, list, dev, mdesc, node,
+ exec_name, q_type, handler, table);
+ if (err) {
+ spu_list_destroy(list);
+ break;
+ }
+ }
+
+ return err;
+}
+
+static int __devinit get_irq_props(struct mdesc_handle *mdesc, u64 node,
+ struct spu_mdesc_info *ip)
+{
+ const u64 *intr, *ino;
+ int intr_len, ino_len;
+ int i;
+
+ intr = mdesc_get_property(mdesc, node, "intr", &intr_len);
+ if (!intr)
+ return -ENODEV;
+
+ ino = mdesc_get_property(mdesc, node, "ino", &ino_len);
+ if (!intr)
+ return -ENODEV;
+
+ if (intr_len != ino_len)
+ return -EINVAL;
+
+ ip->num_intrs = intr_len / sizeof(u64);
+ ip->ino_table = kzalloc((sizeof(struct ino_blob) *
+ ip->num_intrs),
+ GFP_KERNEL);
+ if (!ip->ino_table)
+ return -ENOMEM;
+
+ for (i = 0; i < ip->num_intrs; i++) {
+ struct ino_blob *b = &ip->ino_table[i];
+ b->intr = intr[i];
+ b->ino = ino[i];
+ }
+
+ return 0;
+}
+
+static int __devinit grab_mdesc_irq_props(struct mdesc_handle *mdesc,
+ struct of_device *dev,
+ struct spu_mdesc_info *ip,
+ const char *node_name)
+{
+ const unsigned int *reg;
+ u64 node;
+
+ reg = of_get_property(dev->node, "reg", NULL);
+ if (!reg)
+ return -ENODEV;
+
+ mdesc_for_each_node_by_name(mdesc, node, "virtual-device") {
+ const char *name;
+ const u64 *chdl;
+
+ name = mdesc_get_property(mdesc, node, "name", NULL);
+ if (!name || strcmp(name, node_name))
+ continue;
+ chdl = mdesc_get_property(mdesc, node, "cfg-handle", NULL);
+ if (!chdl || (*chdl != *reg))
+ continue;
+ ip->cfg_handle = *chdl;
+ return get_irq_props(mdesc, node, ip);
+ }
+
+ return -ENODEV;
+}
+
+static unsigned long n2_spu_hvapi_major;
+static unsigned long n2_spu_hvapi_minor;
+
+static int __devinit n2_spu_hvapi_register(void)
+{
+ int err;
+
+ n2_spu_hvapi_major = 2;
+ n2_spu_hvapi_minor = 0;
+
+ err = sun4v_hvapi_register(HV_GRP_NCS,
+ n2_spu_hvapi_major,
+ &n2_spu_hvapi_minor);
+
+ if (!err)
+ pr_info("Registered NCS HVAPI version %lu.%lu\n",
+ n2_spu_hvapi_major,
+ n2_spu_hvapi_minor);
+
+ return err;
+}
+
+static void n2_spu_hvapi_unregister(void)
+{
+ sun4v_hvapi_unregister(HV_GRP_NCS);
+}
+
+static int global_ref;
+
+static int __devinit grab_global_resources(void)
+{
+ int err = 0;
+
+ mutex_lock(&spu_lock);
+
+ if (global_ref++)
+ goto out;
+
+ err = n2_spu_hvapi_register();
+ if (err)
+ goto out;
+
+ err = queue_cache_init();
+ if (err)
+ goto out_hvapi_release;
+
+ err = -ENOMEM;
+ cpu_to_cwq = kzalloc(sizeof(struct spu_queue *) * NR_CPUS,
+ GFP_KERNEL);
+ if (!cpu_to_cwq)
+ goto out_queue_cache_destroy;
+
+ cpu_to_mau = kzalloc(sizeof(struct spu_queue *) * NR_CPUS,
+ GFP_KERNEL);
+ if (!cpu_to_mau)
+ goto out_free_cwq_table;
+
+ err = 0;
+
+out:
+ if (err)
+ global_ref--;
+ mutex_unlock(&spu_lock);
+ return err;
+
+out_free_cwq_table:
+ kfree(cpu_to_cwq);
+ cpu_to_cwq = NULL;
+
+out_queue_cache_destroy:
+ queue_cache_destroy();
+
+out_hvapi_release:
+ n2_spu_hvapi_unregister();
+ goto out;
+}
+
+static void release_global_resources(void)
+{
+ mutex_lock(&spu_lock);
+ if (!--global_ref) {
+ kfree(cpu_to_cwq);
+ cpu_to_cwq = NULL;
+
+ kfree(cpu_to_mau);
+ cpu_to_mau = NULL;
+
+ queue_cache_destroy();
+ n2_spu_hvapi_unregister();
+ }
+ mutex_unlock(&spu_lock);
+}
+
+static struct n2_crypto * __devinit alloc_n2cp(void)
+{
+ struct n2_crypto *np = kzalloc(sizeof(struct n2_crypto), GFP_KERNEL);
+
+ if (np)
+ INIT_LIST_HEAD(&np->cwq_list);
+
+ return np;
+}
+
+static void free_n2cp(struct n2_crypto *np)
+{
+ if (np->cwq_info.ino_table) {
+ kfree(np->cwq_info.ino_table);
+ np->cwq_info.ino_table = NULL;
+ }
+
+ kfree(np);
+}
+
+static void __devinit n2_spu_driver_version(void)
+{
+ static int n2_spu_version_printed;
+
+ if (n2_spu_version_printed++ == 0)
+ pr_info("%s", version);
+}
+
+static int __devinit n2_crypto_probe(struct of_device *dev,
+ const struct of_device_id *match)
+{
+ struct mdesc_handle *mdesc;
+ const char *full_name;
+ struct n2_crypto *np;
+ int err;
+
+ n2_spu_driver_version();
+
+ full_name = dev->node->full_name;
+ pr_info("Found N2CP at %s\n", full_name);
+
+ np = alloc_n2cp();
+ if (!np) {
+ dev_err(&dev->dev, "%s: Unable to allocate n2cp.\n",
+ full_name);
+ return -ENOMEM;
+ }
+
+ err = grab_global_resources();
+ if (err) {
+ dev_err(&dev->dev, "%s: Unable to grab "
+ "global resources.\n", full_name);
+ goto out_free_n2cp;
+ }
+
+ mdesc = mdesc_grab();
+
+ if (!mdesc) {
+ dev_err(&dev->dev, "%s: Unable to grab MDESC.\n",
+ full_name);
+ err = -ENODEV;
+ goto out_free_global;
+ }
+ err = grab_mdesc_irq_props(mdesc, dev, &np->cwq_info, "n2cp");
+ if (err) {
+ dev_err(&dev->dev, "%s: Unable to grab IRQ props.\n",
+ full_name);
+ mdesc_release(mdesc);
+ goto out_free_global;
+ }
+
+ err = spu_mdesc_scan(mdesc, dev, &np->cwq_info, &np->cwq_list,
+ "cwq", HV_NCS_QTYPE_CWQ, cwq_intr,
+ cpu_to_cwq);
+ mdesc_release(mdesc);
+
+ if (err) {
+ dev_err(&dev->dev, "%s: CWQ MDESC scan failed.\n",
+ full_name);
+ goto out_free_global;
+ }
+
+ err = n2_register_algs();
+ if (err) {
+ dev_err(&dev->dev, "%s: Unable to register algorithms.\n",
+ full_name);
+ goto out_free_spu_list;
+ }
+
+ dev_set_drvdata(&dev->dev, np);
+
+ return 0;
+
+out_free_spu_list:
+ spu_list_destroy(&np->cwq_list);
+
+out_free_global:
+ release_global_resources();
+
+out_free_n2cp:
+ free_n2cp(np);
+
+ return err;
+}
+
+static int __devexit n2_crypto_remove(struct of_device *dev)
+{
+ struct n2_crypto *np = dev_get_drvdata(&dev->dev);
+
+ n2_unregister_algs();
+
+ spu_list_destroy(&np->cwq_list);
+
+ release_global_resources();
+
+ free_n2cp(np);
+
+ return 0;
+}
+
+static struct n2_mau * __devinit alloc_ncp(void)
+{
+ struct n2_mau *mp = kzalloc(sizeof(struct n2_mau), GFP_KERNEL);
+
+ if (mp)
+ INIT_LIST_HEAD(&mp->mau_list);
+
+ return mp;
+}
+
+static void free_ncp(struct n2_mau *mp)
+{
+ if (mp->mau_info.ino_table) {
+ kfree(mp->mau_info.ino_table);
+ mp->mau_info.ino_table = NULL;
+ }
+
+ kfree(mp);
+}
+
+static int __devinit n2_mau_probe(struct of_device *dev,
+ const struct of_device_id *match)
+{
+ struct mdesc_handle *mdesc;
+ const char *full_name;
+ struct n2_mau *mp;
+ int err;
+
+ n2_spu_driver_version();
+
+ full_name = dev->node->full_name;
+ pr_info("Found NCP at %s\n", full_name);
+
+ mp = alloc_ncp();
+ if (!mp) {
+ dev_err(&dev->dev, "%s: Unable to allocate ncp.\n",
+ full_name);
+ return -ENOMEM;
+ }
+
+ err = grab_global_resources();
+ if (err) {
+ dev_err(&dev->dev, "%s: Unable to grab "
+ "global resources.\n", full_name);
+ goto out_free_ncp;
+ }
+
+ mdesc = mdesc_grab();
+
+ if (!mdesc) {
+ dev_err(&dev->dev, "%s: Unable to grab MDESC.\n",
+ full_name);
+ err = -ENODEV;
+ goto out_free_global;
+ }
+
+ err = grab_mdesc_irq_props(mdesc, dev, &mp->mau_info, "ncp");
+ if (err) {
+ dev_err(&dev->dev, "%s: Unable to grab IRQ props.\n",
+ full_name);
+ mdesc_release(mdesc);
+ goto out_free_global;
+ }
+
+ err = spu_mdesc_scan(mdesc, dev, &mp->mau_info, &mp->mau_list,
+ "mau", HV_NCS_QTYPE_MAU, mau_intr,
+ cpu_to_mau);
+ mdesc_release(mdesc);
+
+ if (err) {
+ dev_err(&dev->dev, "%s: MAU MDESC scan failed.\n",
+ full_name);
+ goto out_free_global;
+ }
+
+ dev_set_drvdata(&dev->dev, mp);
+
+ return 0;
+
+out_free_global:
+ release_global_resources();
+
+out_free_ncp:
+ free_ncp(mp);
+
+ return err;
+}
+
+static int __devexit n2_mau_remove(struct of_device *dev)
+{
+ struct n2_mau *mp = dev_get_drvdata(&dev->dev);
+
+ spu_list_destroy(&mp->mau_list);
+
+ release_global_resources();
+
+ free_ncp(mp);
+
+ return 0;
+}
+
+static struct of_device_id n2_crypto_match[] = {
+ {
+ .name = "n2cp",
+ .compatible = "SUNW,n2-cwq",
+ },
+ {
+ .name = "n2cp",
+ .compatible = "SUNW,vf-cwq",
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, n2_crypto_match);
+
+static struct of_platform_driver n2_crypto_driver = {
+ .name = "n2cp",
+ .match_table = n2_crypto_match,
+ .probe = n2_crypto_probe,
+ .remove = __devexit_p(n2_crypto_remove),
+};
+
+static struct of_device_id n2_mau_match[] = {
+ {
+ .name = "ncp",
+ .compatible = "SUNW,n2-mau",
+ },
+ {
+ .name = "ncp",
+ .compatible = "SUNW,vf-mau",
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, n2_mau_match);
+
+static struct of_platform_driver n2_mau_driver = {
+ .name = "ncp",
+ .match_table = n2_mau_match,
+ .probe = n2_mau_probe,
+ .remove = __devexit_p(n2_mau_remove),
+};
+
+static int __init n2_init(void)
+{
+ int err = of_register_driver(&n2_crypto_driver, &of_bus_type);
+
+ if (!err) {
+ err = of_register_driver(&n2_mau_driver, &of_bus_type);
+ if (err)
+ of_unregister_driver(&n2_crypto_driver);
+ }
+ return err;
+}
+
+static void __exit n2_exit(void)
+{
+ of_unregister_driver(&n2_mau_driver);
+ of_unregister_driver(&n2_crypto_driver);
+}
+
+module_init(n2_init);
+module_exit(n2_exit);
projects / mirror_ubuntu-hirsute-kernel.git / commitdiff