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path: root/drivers/crypto/stm32/stm32-cryp.c
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Diffstat (limited to 'drivers/crypto/stm32/stm32-cryp.c')
-rw-r--r--drivers/crypto/stm32/stm32-cryp.c417
1 files changed, 324 insertions, 93 deletions
diff --git a/drivers/crypto/stm32/stm32-cryp.c b/drivers/crypto/stm32/stm32-cryp.c
index 59ef541123ae..4208338e72b6 100644
--- a/drivers/crypto/stm32/stm32-cryp.c
+++ b/drivers/crypto/stm32/stm32-cryp.c
@@ -2,6 +2,7 @@
/*
* Copyright (C) STMicroelectronics SA 2017
* Author: Fabien Dessenne <fabien.dessenne@st.com>
+ * Ux500 support taken from snippets in the old Ux500 cryp driver
*/
#include <linux/clk.h>
@@ -62,6 +63,29 @@
#define CRYP_CSGCMCCM0R 0x00000050
#define CRYP_CSGCM0R 0x00000070
+#define UX500_CRYP_CR 0x00000000
+#define UX500_CRYP_SR 0x00000004
+#define UX500_CRYP_DIN 0x00000008
+#define UX500_CRYP_DINSIZE 0x0000000C
+#define UX500_CRYP_DOUT 0x00000010
+#define UX500_CRYP_DOUSIZE 0x00000014
+#define UX500_CRYP_DMACR 0x00000018
+#define UX500_CRYP_IMSC 0x0000001C
+#define UX500_CRYP_RIS 0x00000020
+#define UX500_CRYP_MIS 0x00000024
+#define UX500_CRYP_K1L 0x00000028
+#define UX500_CRYP_K1R 0x0000002C
+#define UX500_CRYP_K2L 0x00000030
+#define UX500_CRYP_K2R 0x00000034
+#define UX500_CRYP_K3L 0x00000038
+#define UX500_CRYP_K3R 0x0000003C
+#define UX500_CRYP_K4L 0x00000040
+#define UX500_CRYP_K4R 0x00000044
+#define UX500_CRYP_IV0L 0x00000048
+#define UX500_CRYP_IV0R 0x0000004C
+#define UX500_CRYP_IV1L 0x00000050
+#define UX500_CRYP_IV1R 0x00000054
+
/* Registers values */
#define CR_DEC_NOT_ENC 0x00000004
#define CR_TDES_ECB 0x00000000
@@ -71,7 +95,8 @@
#define CR_AES_ECB 0x00000020
#define CR_AES_CBC 0x00000028
#define CR_AES_CTR 0x00000030
-#define CR_AES_KP 0x00000038
+#define CR_AES_KP 0x00000038 /* Not on Ux500 */
+#define CR_AES_XTS 0x00000038 /* Only on Ux500 */
#define CR_AES_GCM 0x00080000
#define CR_AES_CCM 0x00080008
#define CR_AES_UNKNOWN 0xFFFFFFFF
@@ -83,6 +108,8 @@
#define CR_KEY128 0x00000000
#define CR_KEY192 0x00000100
#define CR_KEY256 0x00000200
+#define CR_KEYRDEN 0x00000400 /* Only on Ux500 */
+#define CR_KSE 0x00000800 /* Only on Ux500 */
#define CR_FFLUSH 0x00004000
#define CR_CRYPEN 0x00008000
#define CR_PH_INIT 0x00000000
@@ -107,8 +134,25 @@
#define CRYP_AUTOSUSPEND_DELAY 50
struct stm32_cryp_caps {
- bool swap_final;
- bool padding_wa;
+ bool aeads_support;
+ bool linear_aes_key;
+ bool kp_mode;
+ bool iv_protection;
+ bool swap_final;
+ bool padding_wa;
+ u32 cr;
+ u32 sr;
+ u32 din;
+ u32 dout;
+ u32 imsc;
+ u32 mis;
+ u32 k1l;
+ u32 k1r;
+ u32 k3r;
+ u32 iv0l;
+ u32 iv0r;
+ u32 iv1l;
+ u32 iv1r;
};
struct stm32_cryp_ctx {
@@ -228,20 +272,21 @@ static inline int stm32_cryp_wait_busy(struct stm32_cryp *cryp)
{
u32 status;
- return readl_relaxed_poll_timeout(cryp->regs + CRYP_SR, status,
+ return readl_relaxed_poll_timeout(cryp->regs + cryp->caps->sr, status,
!(status & SR_BUSY), 10, 100000);
}
static inline void stm32_cryp_enable(struct stm32_cryp *cryp)
{
- writel_relaxed(readl_relaxed(cryp->regs + CRYP_CR) | CR_CRYPEN, cryp->regs + CRYP_CR);
+ writel_relaxed(readl_relaxed(cryp->regs + cryp->caps->cr) | CR_CRYPEN,
+ cryp->regs + cryp->caps->cr);
}
static inline int stm32_cryp_wait_enable(struct stm32_cryp *cryp)
{
u32 status;
- return readl_relaxed_poll_timeout(cryp->regs + CRYP_CR, status,
+ return readl_relaxed_poll_timeout(cryp->regs + cryp->caps->cr, status,
!(status & CR_CRYPEN), 10, 100000);
}
@@ -249,10 +294,22 @@ static inline int stm32_cryp_wait_output(struct stm32_cryp *cryp)
{
u32 status;
- return readl_relaxed_poll_timeout(cryp->regs + CRYP_SR, status,
+ return readl_relaxed_poll_timeout(cryp->regs + cryp->caps->sr, status,
status & SR_OFNE, 10, 100000);
}
+static inline void stm32_cryp_key_read_enable(struct stm32_cryp *cryp)
+{
+ writel_relaxed(readl_relaxed(cryp->regs + cryp->caps->cr) | CR_KEYRDEN,
+ cryp->regs + cryp->caps->cr);
+}
+
+static inline void stm32_cryp_key_read_disable(struct stm32_cryp *cryp)
+{
+ writel_relaxed(readl_relaxed(cryp->regs + cryp->caps->cr) & ~CR_KEYRDEN,
+ cryp->regs + cryp->caps->cr);
+}
+
static int stm32_cryp_read_auth_tag(struct stm32_cryp *cryp);
static void stm32_cryp_finish_req(struct stm32_cryp *cryp, int err);
@@ -281,12 +338,12 @@ static void stm32_cryp_hw_write_iv(struct stm32_cryp *cryp, __be32 *iv)
if (!iv)
return;
- stm32_cryp_write(cryp, CRYP_IV0LR, be32_to_cpu(*iv++));
- stm32_cryp_write(cryp, CRYP_IV0RR, be32_to_cpu(*iv++));
+ stm32_cryp_write(cryp, cryp->caps->iv0l, be32_to_cpu(*iv++));
+ stm32_cryp_write(cryp, cryp->caps->iv0r, be32_to_cpu(*iv++));
if (is_aes(cryp)) {
- stm32_cryp_write(cryp, CRYP_IV1LR, be32_to_cpu(*iv++));
- stm32_cryp_write(cryp, CRYP_IV1RR, be32_to_cpu(*iv++));
+ stm32_cryp_write(cryp, cryp->caps->iv1l, be32_to_cpu(*iv++));
+ stm32_cryp_write(cryp, cryp->caps->iv1r, be32_to_cpu(*iv++));
}
}
@@ -298,12 +355,102 @@ static void stm32_cryp_get_iv(struct stm32_cryp *cryp)
if (!tmp)
return;
- *tmp++ = cpu_to_be32(stm32_cryp_read(cryp, CRYP_IV0LR));
- *tmp++ = cpu_to_be32(stm32_cryp_read(cryp, CRYP_IV0RR));
+ if (cryp->caps->iv_protection)
+ stm32_cryp_key_read_enable(cryp);
+
+ *tmp++ = cpu_to_be32(stm32_cryp_read(cryp, cryp->caps->iv0l));
+ *tmp++ = cpu_to_be32(stm32_cryp_read(cryp, cryp->caps->iv0r));
if (is_aes(cryp)) {
- *tmp++ = cpu_to_be32(stm32_cryp_read(cryp, CRYP_IV1LR));
- *tmp++ = cpu_to_be32(stm32_cryp_read(cryp, CRYP_IV1RR));
+ *tmp++ = cpu_to_be32(stm32_cryp_read(cryp, cryp->caps->iv1l));
+ *tmp++ = cpu_to_be32(stm32_cryp_read(cryp, cryp->caps->iv1r));
+ }
+
+ if (cryp->caps->iv_protection)
+ stm32_cryp_key_read_disable(cryp);
+}
+
+/**
+ * ux500_swap_bits_in_byte() - mirror the bits in a byte
+ * @b: the byte to be mirrored
+ *
+ * The bits are swapped the following way:
+ * Byte b include bits 0-7, nibble 1 (n1) include bits 0-3 and
+ * nibble 2 (n2) bits 4-7.
+ *
+ * Nibble 1 (n1):
+ * (The "old" (moved) bit is replaced with a zero)
+ * 1. Move bit 6 and 7, 4 positions to the left.
+ * 2. Move bit 3 and 5, 2 positions to the left.
+ * 3. Move bit 1-4, 1 position to the left.
+ *
+ * Nibble 2 (n2):
+ * 1. Move bit 0 and 1, 4 positions to the right.
+ * 2. Move bit 2 and 4, 2 positions to the right.
+ * 3. Move bit 3-6, 1 position to the right.
+ *
+ * Combine the two nibbles to a complete and swapped byte.
+ */
+static inline u8 ux500_swap_bits_in_byte(u8 b)
+{
+#define R_SHIFT_4_MASK 0xc0 /* Bits 6 and 7, right shift 4 */
+#define R_SHIFT_2_MASK 0x28 /* (After right shift 4) Bits 3 and 5,
+ right shift 2 */
+#define R_SHIFT_1_MASK 0x1e /* (After right shift 2) Bits 1-4,
+ right shift 1 */
+#define L_SHIFT_4_MASK 0x03 /* Bits 0 and 1, left shift 4 */
+#define L_SHIFT_2_MASK 0x14 /* (After left shift 4) Bits 2 and 4,
+ left shift 2 */
+#define L_SHIFT_1_MASK 0x78 /* (After left shift 1) Bits 3-6,
+ left shift 1 */
+
+ u8 n1;
+ u8 n2;
+
+ /* Swap most significant nibble */
+ /* Right shift 4, bits 6 and 7 */
+ n1 = ((b & R_SHIFT_4_MASK) >> 4) | (b & ~(R_SHIFT_4_MASK >> 4));
+ /* Right shift 2, bits 3 and 5 */
+ n1 = ((n1 & R_SHIFT_2_MASK) >> 2) | (n1 & ~(R_SHIFT_2_MASK >> 2));
+ /* Right shift 1, bits 1-4 */
+ n1 = (n1 & R_SHIFT_1_MASK) >> 1;
+
+ /* Swap least significant nibble */
+ /* Left shift 4, bits 0 and 1 */
+ n2 = ((b & L_SHIFT_4_MASK) << 4) | (b & ~(L_SHIFT_4_MASK << 4));
+ /* Left shift 2, bits 2 and 4 */
+ n2 = ((n2 & L_SHIFT_2_MASK) << 2) | (n2 & ~(L_SHIFT_2_MASK << 2));
+ /* Left shift 1, bits 3-6 */
+ n2 = (n2 & L_SHIFT_1_MASK) << 1;
+
+ return n1 | n2;
+}
+
+/**
+ * ux500_swizzle_key() - Shuffle around words and bits in the AES key
+ * @in: key to swizzle
+ * @out: swizzled key
+ * @len: length of key, in bytes
+ *
+ * This "key swizzling procedure" is described in the examples in the
+ * DB8500 design specification. There is no real description of why
+ * the bits have been arranged like this in the hardware.
+ */
+static inline void ux500_swizzle_key(const u8 *in, u8 *out, u32 len)
+{
+ int i = 0;
+ int bpw = sizeof(u32);
+ int j;
+ int index = 0;
+
+ j = len - bpw;
+ while (j >= 0) {
+ for (i = 0; i < bpw; i++) {
+ index = len - j - bpw + i;
+ out[j + i] =
+ ux500_swap_bits_in_byte(in[index]);
+ }
+ j -= bpw;
}
}
@@ -313,14 +460,33 @@ static void stm32_cryp_hw_write_key(struct stm32_cryp *c)
int r_id;
if (is_des(c)) {
- stm32_cryp_write(c, CRYP_K1LR, be32_to_cpu(c->ctx->key[0]));
- stm32_cryp_write(c, CRYP_K1RR, be32_to_cpu(c->ctx->key[1]));
- } else {
- r_id = CRYP_K3RR;
- for (i = c->ctx->keylen / sizeof(u32); i > 0; i--, r_id -= 4)
- stm32_cryp_write(c, r_id,
- be32_to_cpu(c->ctx->key[i - 1]));
+ stm32_cryp_write(c, c->caps->k1l, be32_to_cpu(c->ctx->key[0]));
+ stm32_cryp_write(c, c->caps->k1r, be32_to_cpu(c->ctx->key[1]));
+ return;
}
+
+ /*
+ * On the Ux500 the AES key is considered as a single bit sequence
+ * of 128, 192 or 256 bits length. It is written linearly into the
+ * registers from K1L and down, and need to be processed to become
+ * a proper big-endian bit sequence.
+ */
+ if (is_aes(c) && c->caps->linear_aes_key) {
+ u32 tmpkey[8];
+
+ ux500_swizzle_key((u8 *)c->ctx->key,
+ (u8 *)tmpkey, c->ctx->keylen);
+
+ r_id = c->caps->k1l;
+ for (i = 0; i < c->ctx->keylen / sizeof(u32); i++, r_id += 4)
+ stm32_cryp_write(c, r_id, tmpkey[i]);
+
+ return;
+ }
+
+ r_id = c->caps->k3r;
+ for (i = c->ctx->keylen / sizeof(u32); i > 0; i--, r_id -= 4)
+ stm32_cryp_write(c, r_id, be32_to_cpu(c->ctx->key[i - 1]));
}
static u32 stm32_cryp_get_hw_mode(struct stm32_cryp *cryp)
@@ -373,7 +539,7 @@ static int stm32_cryp_gcm_init(struct stm32_cryp *cryp, u32 cfg)
cryp->gcm_ctr = GCM_CTR_INIT;
stm32_cryp_hw_write_iv(cryp, iv);
- stm32_cryp_write(cryp, CRYP_CR, cfg | CR_PH_INIT | CR_CRYPEN);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg | CR_PH_INIT | CR_CRYPEN);
/* Wait for end of processing */
ret = stm32_cryp_wait_enable(cryp);
@@ -385,10 +551,10 @@ static int stm32_cryp_gcm_init(struct stm32_cryp *cryp, u32 cfg)
/* Prepare next phase */
if (cryp->areq->assoclen) {
cfg |= CR_PH_HEADER;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
} else if (stm32_cryp_get_input_text_len(cryp)) {
cfg |= CR_PH_PAYLOAD;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
}
return 0;
@@ -405,20 +571,20 @@ static void stm32_crypt_gcmccm_end_header(struct stm32_cryp *cryp)
err = stm32_cryp_wait_busy(cryp);
if (err) {
dev_err(cryp->dev, "Timeout (gcm/ccm header)\n");
- stm32_cryp_write(cryp, CRYP_IMSCR, 0);
+ stm32_cryp_write(cryp, cryp->caps->imsc, 0);
stm32_cryp_finish_req(cryp, err);
return;
}
if (stm32_cryp_get_input_text_len(cryp)) {
/* Phase 3 : payload */
- cfg = stm32_cryp_read(cryp, CRYP_CR);
+ cfg = stm32_cryp_read(cryp, cryp->caps->cr);
cfg &= ~CR_CRYPEN;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
cfg &= ~CR_PH_MASK;
cfg |= CR_PH_PAYLOAD | CR_CRYPEN;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
} else {
/*
* Phase 4 : tag.
@@ -458,7 +624,7 @@ static void stm32_cryp_write_ccm_first_header(struct stm32_cryp *cryp)
scatterwalk_copychunks((char *)block + len, &cryp->in_walk, written, 0);
for (i = 0; i < AES_BLOCK_32; i++)
- stm32_cryp_write(cryp, CRYP_DIN, block[i]);
+ stm32_cryp_write(cryp, cryp->caps->din, block[i]);
cryp->header_in -= written;
@@ -494,7 +660,7 @@ static int stm32_cryp_ccm_init(struct stm32_cryp *cryp, u32 cfg)
b0[AES_BLOCK_SIZE - 1] = textlen & 0xFF;
/* Enable HW */
- stm32_cryp_write(cryp, CRYP_CR, cfg | CR_PH_INIT | CR_CRYPEN);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg | CR_PH_INIT | CR_CRYPEN);
/* Write B0 */
d = (u32 *)b0;
@@ -505,7 +671,7 @@ static int stm32_cryp_ccm_init(struct stm32_cryp *cryp, u32 cfg)
if (!cryp->caps->padding_wa)
xd = be32_to_cpu(bd[i]);
- stm32_cryp_write(cryp, CRYP_DIN, xd);
+ stm32_cryp_write(cryp, cryp->caps->din, xd);
}
/* Wait for end of processing */
@@ -518,13 +684,13 @@ static int stm32_cryp_ccm_init(struct stm32_cryp *cryp, u32 cfg)
/* Prepare next phase */
if (cryp->areq->assoclen) {
cfg |= CR_PH_HEADER | CR_CRYPEN;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
/* Write first (special) block (may move to next phase [payload]) */
stm32_cryp_write_ccm_first_header(cryp);
} else if (stm32_cryp_get_input_text_len(cryp)) {
cfg |= CR_PH_PAYLOAD;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
}
return 0;
@@ -538,7 +704,7 @@ static int stm32_cryp_hw_init(struct stm32_cryp *cryp)
pm_runtime_get_sync(cryp->dev);
/* Disable interrupt */
- stm32_cryp_write(cryp, CRYP_IMSCR, 0);
+ stm32_cryp_write(cryp, cryp->caps->imsc, 0);
/* Set configuration */
cfg = CR_DATA8 | CR_FFLUSH;
@@ -566,7 +732,12 @@ static int stm32_cryp_hw_init(struct stm32_cryp *cryp)
if (is_decrypt(cryp) &&
((hw_mode == CR_AES_ECB) || (hw_mode == CR_AES_CBC))) {
/* Configure in key preparation mode */
- stm32_cryp_write(cryp, CRYP_CR, cfg | CR_AES_KP);
+ if (cryp->caps->kp_mode)
+ stm32_cryp_write(cryp, cryp->caps->cr,
+ cfg | CR_AES_KP);
+ else
+ stm32_cryp_write(cryp,
+ cryp->caps->cr, cfg | CR_AES_ECB | CR_KSE);
/* Set key only after full configuration done */
stm32_cryp_hw_write_key(cryp);
@@ -583,14 +754,14 @@ static int stm32_cryp_hw_init(struct stm32_cryp *cryp)
cfg |= hw_mode | CR_DEC_NOT_ENC;
/* Apply updated config (Decrypt + algo) and flush */
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
} else {
cfg |= hw_mode;
if (is_decrypt(cryp))
cfg |= CR_DEC_NOT_ENC;
/* Apply config and flush */
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
/* Set key only after configuration done */
stm32_cryp_hw_write_key(cryp);
@@ -649,7 +820,7 @@ static void stm32_cryp_finish_req(struct stm32_cryp *cryp, int err)
static int stm32_cryp_cpu_start(struct stm32_cryp *cryp)
{
/* Enable interrupt and let the IRQ handler do everything */
- stm32_cryp_write(cryp, CRYP_IMSCR, IMSCR_IN | IMSCR_OUT);
+ stm32_cryp_write(cryp, cryp->caps->imsc, IMSCR_IN | IMSCR_OUT);
return 0;
}
@@ -1137,14 +1308,14 @@ static int stm32_cryp_read_auth_tag(struct stm32_cryp *cryp)
int ret = 0;
/* Update Config */
- cfg = stm32_cryp_read(cryp, CRYP_CR);
+ cfg = stm32_cryp_read(cryp, cryp->caps->cr);
cfg &= ~CR_PH_MASK;
cfg |= CR_PH_FINAL;
cfg &= ~CR_DEC_NOT_ENC;
cfg |= CR_CRYPEN;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
if (is_gcm(cryp)) {
/* GCM: write aad and payload size (in bits) */
@@ -1152,8 +1323,8 @@ static int stm32_cryp_read_auth_tag(struct stm32_cryp *cryp)
if (cryp->caps->swap_final)
size_bit = (__force u32)cpu_to_be32(size_bit);
- stm32_cryp_write(cryp, CRYP_DIN, 0);
- stm32_cryp_write(cryp, CRYP_DIN, size_bit);
+ stm32_cryp_write(cryp, cryp->caps->din, 0);
+ stm32_cryp_write(cryp, cryp->caps->din, size_bit);
size_bit = is_encrypt(cryp) ? cryp->areq->cryptlen :
cryp->areq->cryptlen - cryp->authsize;
@@ -1161,8 +1332,8 @@ static int stm32_cryp_read_auth_tag(struct stm32_cryp *cryp)
if (cryp->caps->swap_final)
size_bit = (__force u32)cpu_to_be32(size_bit);
- stm32_cryp_write(cryp, CRYP_DIN, 0);
- stm32_cryp_write(cryp, CRYP_DIN, size_bit);
+ stm32_cryp_write(cryp, cryp->caps->din, 0);
+ stm32_cryp_write(cryp, cryp->caps->din, size_bit);
} else {
/* CCM: write CTR0 */
u32 iv32[AES_BLOCK_32];
@@ -1177,7 +1348,7 @@ static int stm32_cryp_read_auth_tag(struct stm32_cryp *cryp)
if (!cryp->caps->padding_wa)
xiv = be32_to_cpu(biv[i]);
- stm32_cryp_write(cryp, CRYP_DIN, xiv);
+ stm32_cryp_write(cryp, cryp->caps->din, xiv);
}
}
@@ -1193,7 +1364,7 @@ static int stm32_cryp_read_auth_tag(struct stm32_cryp *cryp)
/* Get and write tag */
for (i = 0; i < AES_BLOCK_32; i++)
- out_tag[i] = stm32_cryp_read(cryp, CRYP_DOUT);
+ out_tag[i] = stm32_cryp_read(cryp, cryp->caps->dout);
scatterwalk_copychunks(out_tag, &cryp->out_walk, cryp->authsize, 1);
} else {
@@ -1203,7 +1374,7 @@ static int stm32_cryp_read_auth_tag(struct stm32_cryp *cryp)
scatterwalk_copychunks(in_tag, &cryp->in_walk, cryp->authsize, 0);
for (i = 0; i < AES_BLOCK_32; i++)
- out_tag[i] = stm32_cryp_read(cryp, CRYP_DOUT);
+ out_tag[i] = stm32_cryp_read(cryp, cryp->caps->dout);
if (crypto_memneq(in_tag, out_tag, cryp->authsize))
ret = -EBADMSG;
@@ -1211,7 +1382,7 @@ static int stm32_cryp_read_auth_tag(struct stm32_cryp *cryp)
/* Disable cryp */
cfg &= ~CR_CRYPEN;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
return ret;
}
@@ -1227,19 +1398,19 @@ static void stm32_cryp_check_ctr_counter(struct stm32_cryp *cryp)
*/
crypto_inc((u8 *)cryp->last_ctr, sizeof(cryp->last_ctr));
- cr = stm32_cryp_read(cryp, CRYP_CR);
- stm32_cryp_write(cryp, CRYP_CR, cr & ~CR_CRYPEN);
+ cr = stm32_cryp_read(cryp, cryp->caps->cr);
+ stm32_cryp_write(cryp, cryp->caps->cr, cr & ~CR_CRYPEN);
stm32_cryp_hw_write_iv(cryp, cryp->last_ctr);
- stm32_cryp_write(cryp, CRYP_CR, cr);
+ stm32_cryp_write(cryp, cryp->caps->cr, cr);
}
/* The IV registers are BE */
- cryp->last_ctr[0] = cpu_to_be32(stm32_cryp_read(cryp, CRYP_IV0LR));
- cryp->last_ctr[1] = cpu_to_be32(stm32_cryp_read(cryp, CRYP_IV0RR));
- cryp->last_ctr[2] = cpu_to_be32(stm32_cryp_read(cryp, CRYP_IV1LR));
- cryp->last_ctr[3] = cpu_to_be32(stm32_cryp_read(cryp, CRYP_IV1RR));
+ cryp->last_ctr[0] = cpu_to_be32(stm32_cryp_read(cryp, cryp->caps->iv0l));
+ cryp->last_ctr[1] = cpu_to_be32(stm32_cryp_read(cryp, cryp->caps->iv0r));
+ cryp->last_ctr[2] = cpu_to_be32(stm32_cryp_read(cryp, cryp->caps->iv1l));
+ cryp->last_ctr[3] = cpu_to_be32(stm32_cryp_read(cryp, cryp->caps->iv1r));
}
static void stm32_cryp_irq_read_data(struct stm32_cryp *cryp)
@@ -1248,7 +1419,7 @@ static void stm32_cryp_irq_read_data(struct stm32_cryp *cryp)
u32 block[AES_BLOCK_32];
for (i = 0; i < cryp->hw_blocksize / sizeof(u32); i++)
- block[i] = stm32_cryp_read(cryp, CRYP_DOUT);
+ block[i] = stm32_cryp_read(cryp, cryp->caps->dout);
scatterwalk_copychunks(block, &cryp->out_walk, min_t(size_t, cryp->hw_blocksize,
cryp->payload_out), 1);
@@ -1264,7 +1435,7 @@ static void stm32_cryp_irq_write_block(struct stm32_cryp *cryp)
scatterwalk_copychunks(block, &cryp->in_walk, min_t(size_t, cryp->hw_blocksize,
cryp->payload_in), 0);
for (i = 0; i < cryp->hw_blocksize / sizeof(u32); i++)
- stm32_cryp_write(cryp, CRYP_DIN, block[i]);
+ stm32_cryp_write(cryp, cryp->caps->din, block[i]);
cryp->payload_in -= min_t(size_t, cryp->hw_blocksize, cryp->payload_in);
}
@@ -1278,22 +1449,22 @@ static void stm32_cryp_irq_write_gcm_padded_data(struct stm32_cryp *cryp)
/* 'Special workaround' procedure described in the datasheet */
/* a) disable ip */
- stm32_cryp_write(cryp, CRYP_IMSCR, 0);
- cfg = stm32_cryp_read(cryp, CRYP_CR);
+ stm32_cryp_write(cryp, cryp->caps->imsc, 0);
+ cfg = stm32_cryp_read(cryp, cryp->caps->cr);
cfg &= ~CR_CRYPEN;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
/* b) Update IV1R */
- stm32_cryp_write(cryp, CRYP_IV1RR, cryp->gcm_ctr - 2);
+ stm32_cryp_write(cryp, cryp->caps->iv1r, cryp->gcm_ctr - 2);
/* c) change mode to CTR */
cfg &= ~CR_ALGO_MASK;
cfg |= CR_AES_CTR;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
/* a) enable IP */
cfg |= CR_CRYPEN;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
/* b) pad and write the last block */
stm32_cryp_irq_write_block(cryp);
@@ -1310,7 +1481,7 @@ static void stm32_cryp_irq_write_gcm_padded_data(struct stm32_cryp *cryp)
* block value
*/
for (i = 0; i < cryp->hw_blocksize / sizeof(u32); i++)
- block[i] = stm32_cryp_read(cryp, CRYP_DOUT);
+ block[i] = stm32_cryp_read(cryp, cryp->caps->dout);
scatterwalk_copychunks(block, &cryp->out_walk, min_t(size_t, cryp->hw_blocksize,
cryp->payload_out), 1);
@@ -1320,16 +1491,16 @@ static void stm32_cryp_irq_write_gcm_padded_data(struct stm32_cryp *cryp)
/* d) change mode back to AES GCM */
cfg &= ~CR_ALGO_MASK;
cfg |= CR_AES_GCM;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
/* e) change phase to Final */
cfg &= ~CR_PH_MASK;
cfg |= CR_PH_FINAL;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
/* f) write padded data */
for (i = 0; i < AES_BLOCK_32; i++)
- stm32_cryp_write(cryp, CRYP_DIN, block[i]);
+ stm32_cryp_write(cryp, cryp->caps->din, block[i]);
/* g) Empty fifo out */
err = stm32_cryp_wait_output(cryp);
@@ -1339,7 +1510,7 @@ static void stm32_cryp_irq_write_gcm_padded_data(struct stm32_cryp *cryp)
}
for (i = 0; i < AES_BLOCK_32; i++)
- stm32_cryp_read(cryp, CRYP_DOUT);
+ stm32_cryp_read(cryp, cryp->caps->dout);
/* h) run the he normal Final phase */
stm32_cryp_finish_req(cryp, 0);
@@ -1350,13 +1521,13 @@ static void stm32_cryp_irq_set_npblb(struct stm32_cryp *cryp)
u32 cfg;
/* disable ip, set NPBLB and reneable ip */
- cfg = stm32_cryp_read(cryp, CRYP_CR);
+ cfg = stm32_cryp_read(cryp, cryp->caps->cr);
cfg &= ~CR_CRYPEN;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
cfg |= (cryp->hw_blocksize - cryp->payload_in) << CR_NBPBL_SHIFT;
cfg |= CR_CRYPEN;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
}
static void stm32_cryp_irq_write_ccm_padded_data(struct stm32_cryp *cryp)
@@ -1370,11 +1541,11 @@ static void stm32_cryp_irq_write_ccm_padded_data(struct stm32_cryp *cryp)
/* 'Special workaround' procedure described in the datasheet */
/* a) disable ip */
- stm32_cryp_write(cryp, CRYP_IMSCR, 0);
+ stm32_cryp_write(cryp, cryp->caps->imsc, 0);
- cfg = stm32_cryp_read(cryp, CRYP_CR);
+ cfg = stm32_cryp_read(cryp, cryp->caps->cr);
cfg &= ~CR_CRYPEN;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
/* b) get IV1 from CRYP_CSGCMCCM7 */
iv1tmp = stm32_cryp_read(cryp, CRYP_CSGCMCCM0R + 7 * 4);
@@ -1384,23 +1555,23 @@ static void stm32_cryp_irq_write_ccm_padded_data(struct stm32_cryp *cryp)
cstmp1[i] = stm32_cryp_read(cryp, CRYP_CSGCMCCM0R + i * 4);
/* d) Write IV1R */
- stm32_cryp_write(cryp, CRYP_IV1RR, iv1tmp);
+ stm32_cryp_write(cryp, cryp->caps->iv1r, iv1tmp);
/* e) change mode to CTR */
cfg &= ~CR_ALGO_MASK;
cfg |= CR_AES_CTR;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
/* a) enable IP */
cfg |= CR_CRYPEN;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
/* b) pad and write the last block */
stm32_cryp_irq_write_block(cryp);
/* wait end of process */
err = stm32_cryp_wait_output(cryp);
if (err) {
- dev_err(cryp->dev, "Timeout (wite ccm padded data)\n");
+ dev_err(cryp->dev, "Timeout (write ccm padded data)\n");
return stm32_cryp_finish_req(cryp, err);
}
@@ -1410,7 +1581,7 @@ static void stm32_cryp_irq_write_ccm_padded_data(struct stm32_cryp *cryp)
* block value
*/
for (i = 0; i < cryp->hw_blocksize / sizeof(u32); i++)
- block[i] = stm32_cryp_read(cryp, CRYP_DOUT);
+ block[i] = stm32_cryp_read(cryp, cryp->caps->dout);
scatterwalk_copychunks(block, &cryp->out_walk, min_t(size_t, cryp->hw_blocksize,
cryp->payload_out), 1);
@@ -1423,24 +1594,24 @@ static void stm32_cryp_irq_write_ccm_padded_data(struct stm32_cryp *cryp)
/* e) change mode back to AES CCM */
cfg &= ~CR_ALGO_MASK;
cfg |= CR_AES_CCM;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
/* f) change phase to header */
cfg &= ~CR_PH_MASK;
cfg |= CR_PH_HEADER;
- stm32_cryp_write(cryp, CRYP_CR, cfg);
+ stm32_cryp_write(cryp, cryp->caps->cr, cfg);
/* g) XOR and write padded data */
for (i = 0; i < ARRAY_SIZE(block); i++) {
block[i] ^= cstmp1[i];
block[i] ^= cstmp2[i];
- stm32_cryp_write(cryp, CRYP_DIN, block[i]);
+ stm32_cryp_write(cryp, cryp->caps->din, block[i]);
}
/* h) wait for completion */
err = stm32_cryp_wait_busy(cryp);
if (err)
- dev_err(cryp->dev, "Timeout (wite ccm padded data)\n");
+ dev_err(cryp->dev, "Timeout (write ccm padded data)\n");
/* i) run the he normal Final phase */
stm32_cryp_finish_req(cryp, err);
@@ -1497,7 +1668,7 @@ static void stm32_cryp_irq_write_gcmccm_header(struct stm32_cryp *cryp)
scatterwalk_copychunks(block, &cryp->in_walk, written, 0);
for (i = 0; i < AES_BLOCK_32; i++)
- stm32_cryp_write(cryp, CRYP_DIN, block[i]);
+ stm32_cryp_write(cryp, cryp->caps->din, block[i]);
cryp->header_in -= written;
@@ -1508,7 +1679,7 @@ static irqreturn_t stm32_cryp_irq_thread(int irq, void *arg)
{
struct stm32_cryp *cryp = arg;
u32 ph;
- u32 it_mask = stm32_cryp_read(cryp, CRYP_IMSCR);
+ u32 it_mask = stm32_cryp_read(cryp, cryp->caps->imsc);
if (cryp->irq_status & MISR_OUT)
/* Output FIFO IRQ: read data */
@@ -1516,7 +1687,7 @@ static irqreturn_t stm32_cryp_irq_thread(int irq, void *arg)
if (cryp->irq_status & MISR_IN) {
if (is_gcm(cryp) || is_ccm(cryp)) {
- ph = stm32_cryp_read(cryp, CRYP_CR) & CR_PH_MASK;
+ ph = stm32_cryp_read(cryp, cryp->caps->cr) & CR_PH_MASK;
if (unlikely(ph == CR_PH_HEADER))
/* Write Header */
stm32_cryp_irq_write_gcmccm_header(cryp);
@@ -1536,7 +1707,7 @@ static irqreturn_t stm32_cryp_irq_thread(int irq, void *arg)
it_mask &= ~IMSCR_IN;
if (!cryp->payload_out)
it_mask &= ~IMSCR_OUT;
- stm32_cryp_write(cryp, CRYP_IMSCR, it_mask);
+ stm32_cryp_write(cryp, cryp->caps->imsc, it_mask);
if (!cryp->payload_in && !cryp->header_in && !cryp->payload_out)
stm32_cryp_finish_req(cryp, 0);
@@ -1548,7 +1719,7 @@ static irqreturn_t stm32_cryp_irq(int irq, void *arg)
{
struct stm32_cryp *cryp = arg;
- cryp->irq_status = stm32_cryp_read(cryp, CRYP_MISR);
+ cryp->irq_status = stm32_cryp_read(cryp, cryp->caps->mis);
return IRQ_WAKE_THREAD;
}
@@ -1722,17 +1893,74 @@ static struct aead_alg aead_algs[] = {
},
};
+static const struct stm32_cryp_caps ux500_data = {
+ .aeads_support = false,
+ .linear_aes_key = true,
+ .kp_mode = false,
+ .iv_protection = true,
+ .swap_final = true,
+ .padding_wa = true,
+ .cr = UX500_CRYP_CR,
+ .sr = UX500_CRYP_SR,
+ .din = UX500_CRYP_DIN,
+ .dout = UX500_CRYP_DOUT,
+ .imsc = UX500_CRYP_IMSC,
+ .mis = UX500_CRYP_MIS,
+ .k1l = UX500_CRYP_K1L,
+ .k1r = UX500_CRYP_K1R,
+ .k3r = UX500_CRYP_K3R,
+ .iv0l = UX500_CRYP_IV0L,
+ .iv0r = UX500_CRYP_IV0R,
+ .iv1l = UX500_CRYP_IV1L,
+ .iv1r = UX500_CRYP_IV1R,
+};
+
static const struct stm32_cryp_caps f7_data = {
+ .aeads_support = true,
+ .linear_aes_key = false,
+ .kp_mode = true,
+ .iv_protection = false,
.swap_final = true,
.padding_wa = true,
+ .cr = CRYP_CR,
+ .sr = CRYP_SR,
+ .din = CRYP_DIN,
+ .dout = CRYP_DOUT,
+ .imsc = CRYP_IMSCR,
+ .mis = CRYP_MISR,
+ .k1l = CRYP_K1LR,
+ .k1r = CRYP_K1RR,
+ .k3r = CRYP_K3RR,
+ .iv0l = CRYP_IV0LR,
+ .iv0r = CRYP_IV0RR,
+ .iv1l = CRYP_IV1LR,
+ .iv1r = CRYP_IV1RR,
};
static const struct stm32_cryp_caps mp1_data = {
+ .aeads_support = true,
+ .linear_aes_key = false,
+ .kp_mode = true,
+ .iv_protection = false,
.swap_final = false,
.padding_wa = false,
+ .cr = CRYP_CR,
+ .sr = CRYP_SR,
+ .din = CRYP_DIN,
+ .dout = CRYP_DOUT,
+ .imsc = CRYP_IMSCR,
+ .mis = CRYP_MISR,
+ .k1l = CRYP_K1LR,
+ .k1r = CRYP_K1RR,
+ .k3r = CRYP_K3RR,
+ .iv0l = CRYP_IV0LR,
+ .iv0r = CRYP_IV0RR,
+ .iv1l = CRYP_IV1LR,
+ .iv1r = CRYP_IV1RR,
};
static const struct of_device_id stm32_dt_ids[] = {
+ { .compatible = "stericsson,ux500-cryp", .data = &ux500_data},
{ .compatible = "st,stm32f756-cryp", .data = &f7_data},
{ .compatible = "st,stm32mp1-cryp", .data = &mp1_data},
{},
@@ -1829,9 +2057,11 @@ static int stm32_cryp_probe(struct platform_device *pdev)
goto err_algs;
}
- ret = crypto_register_aeads(aead_algs, ARRAY_SIZE(aead_algs));
- if (ret)
- goto err_aead_algs;
+ if (cryp->caps->aeads_support) {
+ ret = crypto_register_aeads(aead_algs, ARRAY_SIZE(aead_algs));
+ if (ret)
+ goto err_aead_algs;
+ }
dev_info(dev, "Initialized\n");
@@ -1869,7 +2099,8 @@ static int stm32_cryp_remove(struct platform_device *pdev)
if (ret < 0)
return ret;
- crypto_unregister_aeads(aead_algs, ARRAY_SIZE(aead_algs));
+ if (cryp->caps->aeads_support)
+ crypto_unregister_aeads(aead_algs, ARRAY_SIZE(aead_algs));
crypto_unregister_skciphers(crypto_algs, ARRAY_SIZE(crypto_algs));
crypto_engine_exit(cryp->engine);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-12 13:03:21 +0300