[PATCH v2 06/10] crypto: omap-aes - Remove usage of private DMA API
Mark A. Greer
mgreer at animalcreek.com
Tue Jan 8 13:57:43 EST 2013
From: "Mark A. Greer" <mgreer at animalcreek.com>
Remove usage of the private OMAP DMA API.
The dmaengine API will be used instead.
CC: Russell King <rmk+kernel at arm.linux.org.uk>
CC: Dmitry Kasatkin <dmitry.kasatkin at intel.com>
Signed-off-by: Mark A. Greer <mgreer at animalcreek.com>
---
drivers/crypto/omap-aes.c | 133 ----------------------------------------------
1 file changed, 133 deletions(-)
diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c
index 14ec9e2..faf522f 100644
--- a/drivers/crypto/omap-aes.c
+++ b/drivers/crypto/omap-aes.c
@@ -12,8 +12,6 @@
*
*/
-#define OMAP_AES_DMA_PRIVATE
-
#define pr_fmt(fmt) "%s: " fmt, __func__
#include <linux/err.h>
@@ -115,33 +113,21 @@ struct omap_aes_dev {
struct ablkcipher_request *req;
size_t total;
struct scatterlist *in_sg;
-#ifndef OMAP_AES_DMA_PRIVATE
struct scatterlist in_sgl;
-#endif
size_t in_offset;
struct scatterlist *out_sg;
-#ifndef OMAP_AES_DMA_PRIVATE
struct scatterlist out_sgl;
-#endif
size_t out_offset;
size_t buflen;
void *buf_in;
size_t dma_size;
int dma_in;
-#ifdef OMAP_AES_DMA_PRIVATE
- int dma_lch_in;
-#else
struct dma_chan *dma_lch_in;
-#endif
dma_addr_t dma_addr_in;
void *buf_out;
int dma_out;
-#ifdef OMAP_AES_DMA_PRIVATE
- int dma_lch_out;
-#else
struct dma_chan *dma_lch_out;
-#endif
dma_addr_t dma_addr_out;
};
@@ -206,17 +192,10 @@ static int omap_aes_write_ctrl(struct omap_aes_dev *dd)
return err;
val = 0;
-#ifdef OMAP_AES_DMA_PRIVATE
- if (dd->dma_lch_out >= 0)
- val |= AES_REG_MASK_DMA_OUT_EN;
- if (dd->dma_lch_in >= 0)
- val |= AES_REG_MASK_DMA_IN_EN;
-#else
if (dd->dma_lch_out != NULL)
val |= AES_REG_MASK_DMA_OUT_EN;
if (dd->dma_lch_in != NULL)
val |= AES_REG_MASK_DMA_IN_EN;
-#endif
mask = AES_REG_MASK_DMA_IN_EN | AES_REG_MASK_DMA_OUT_EN;
@@ -244,22 +223,6 @@ static int omap_aes_write_ctrl(struct omap_aes_dev *dd)
omap_aes_write_mask(dd, AES_REG_CTRL, val, mask);
-#ifdef OMAP_AES_DMA_PRIVATE
- /* IN */
- omap_set_dma_dest_params(dd->dma_lch_in, 0, OMAP_DMA_AMODE_CONSTANT,
- dd->phys_base + AES_REG_DATA, 0, 4);
-
- omap_set_dma_dest_burst_mode(dd->dma_lch_in, OMAP_DMA_DATA_BURST_4);
- omap_set_dma_src_burst_mode(dd->dma_lch_in, OMAP_DMA_DATA_BURST_4);
-
- /* OUT */
- omap_set_dma_src_params(dd->dma_lch_out, 0, OMAP_DMA_AMODE_CONSTANT,
- dd->phys_base + AES_REG_DATA, 0, 4);
-
- omap_set_dma_src_burst_mode(dd->dma_lch_out, OMAP_DMA_DATA_BURST_4);
- omap_set_dma_dest_burst_mode(dd->dma_lch_out, OMAP_DMA_DATA_BURST_4);
-#endif
-
return 0;
}
@@ -284,23 +247,6 @@ static struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_ctx *ctx)
return dd;
}
-#ifdef OMAP_AES_DMA_PRIVATE
-static void omap_aes_dma_callback(int lch, u16 ch_status, void *data)
-{
- struct omap_aes_dev *dd = data;
-
- if (ch_status != OMAP_DMA_BLOCK_IRQ) {
- pr_err("omap-aes DMA error status: 0x%hx\n", ch_status);
- dd->err = -EIO;
- dd->flags &= ~FLAGS_INIT; /* request to re-initialize */
- } else if (lch == dd->dma_lch_in) {
- return;
- }
-
- /* dma_lch_out - completed */
- tasklet_schedule(&dd->done_task);
-}
-#else
static void omap_aes_dma_out_callback(void *data)
{
struct omap_aes_dev *dd = data;
@@ -308,22 +254,14 @@ static void omap_aes_dma_out_callback(void *data)
/* dma_lch_out - completed */
tasklet_schedule(&dd->done_task);
}
-#endif
static int omap_aes_dma_init(struct omap_aes_dev *dd)
{
int err = -ENOMEM;
-#ifndef OMAP_AES_DMA_PRIVATE
dma_cap_mask_t mask;
-#endif
-#ifdef OMAP_AES_DMA_PRIVATE
- dd->dma_lch_out = -1;
- dd->dma_lch_in = -1;
-#else
dd->dma_lch_out = NULL;
dd->dma_lch_in = NULL;
-#endif
dd->buf_in = (void *)__get_free_pages(GFP_KERNEL, OMAP_AES_CACHE_SIZE);
dd->buf_out = (void *)__get_free_pages(GFP_KERNEL, OMAP_AES_CACHE_SIZE);
@@ -352,20 +290,6 @@ static int omap_aes_dma_init(struct omap_aes_dev *dd)
goto err_map_out;
}
-#ifdef OMAP_AES_DMA_PRIVATE
- err = omap_request_dma(dd->dma_in, "omap-aes-rx",
- omap_aes_dma_callback, dd, &dd->dma_lch_in);
- if (err) {
- dev_err(dd->dev, "Unable to request DMA channel\n");
- goto err_dma_in;
- }
- err = omap_request_dma(dd->dma_out, "omap-aes-tx",
- omap_aes_dma_callback, dd, &dd->dma_lch_out);
- if (err) {
- dev_err(dd->dev, "Unable to request DMA channel\n");
- goto err_dma_out;
- }
-#else
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
@@ -382,16 +306,11 @@ static int omap_aes_dma_init(struct omap_aes_dev *dd)
dev_err(dd->dev, "Unable to request out DMA channel\n");
goto err_dma_out;
}
-#endif
return 0;
err_dma_out:
-#ifdef OMAP_AES_DMA_PRIVATE
- omap_free_dma(dd->dma_lch_in);
-#else
dma_release_channel(dd->dma_lch_in);
-#endif
err_dma_in:
dma_unmap_single(dd->dev, dd->dma_addr_out, dd->buflen,
DMA_FROM_DEVICE);
@@ -408,13 +327,8 @@ err_alloc:
static void omap_aes_dma_cleanup(struct omap_aes_dev *dd)
{
-#ifdef OMAP_AES_DMA_PRIVATE
- omap_free_dma(dd->dma_lch_out);
- omap_free_dma(dd->dma_lch_in);
-#else
dma_release_channel(dd->dma_lch_out);
dma_release_channel(dd->dma_lch_in);
-#endif
dma_unmap_single(dd->dev, dd->dma_addr_out, dd->buflen,
DMA_FROM_DEVICE);
dma_unmap_single(dd->dev, dd->dma_addr_in, dd->buflen, DMA_TO_DEVICE);
@@ -472,24 +386,15 @@ static int sg_copy(struct scatterlist **sg, size_t *offset, void *buf,
return off;
}
-#ifdef OMAP_AES_DMA_PRIVATE
-static int omap_aes_crypt_dma(struct crypto_tfm *tfm, dma_addr_t dma_addr_in,
- dma_addr_t dma_addr_out, int length)
-#else
static int omap_aes_crypt_dma(struct crypto_tfm *tfm,
struct scatterlist *in_sg, struct scatterlist *out_sg)
-#endif
{
struct omap_aes_ctx *ctx = crypto_tfm_ctx(tfm);
struct omap_aes_dev *dd = ctx->dd;
-#ifdef OMAP_AES_DMA_PRIVATE
- int len32;
-#else
struct dma_async_tx_descriptor *tx_in, *tx_out;
struct dma_slave_config cfg;
dma_addr_t dma_addr_in = sg_dma_address(in_sg);
int ret, length = sg_dma_len(in_sg);
-#endif
pr_debug("len: %d\n", length);
@@ -499,28 +404,6 @@ static int omap_aes_crypt_dma(struct crypto_tfm *tfm,
dma_sync_single_for_device(dd->dev, dma_addr_in, length,
DMA_TO_DEVICE);
-#ifdef OMAP_AES_DMA_PRIVATE
- len32 = DIV_ROUND_UP(length, sizeof(u32));
-
- /* IN */
- omap_set_dma_transfer_params(dd->dma_lch_in, OMAP_DMA_DATA_TYPE_S32,
- len32, 1, OMAP_DMA_SYNC_PACKET, dd->dma_in,
- OMAP_DMA_DST_SYNC);
-
- omap_set_dma_src_params(dd->dma_lch_in, 0, OMAP_DMA_AMODE_POST_INC,
- dma_addr_in, 0, 0);
-
- /* OUT */
- omap_set_dma_transfer_params(dd->dma_lch_out, OMAP_DMA_DATA_TYPE_S32,
- len32, 1, OMAP_DMA_SYNC_PACKET,
- dd->dma_out, OMAP_DMA_SRC_SYNC);
-
- omap_set_dma_dest_params(dd->dma_lch_out, 0, OMAP_DMA_AMODE_POST_INC,
- dma_addr_out, 0, 0);
-
- omap_start_dma(dd->dma_lch_in);
- omap_start_dma(dd->dma_lch_out);
-#else
memset(&cfg, 0, sizeof(cfg));
cfg.src_addr = dd->phys_base + AES_REG_DATA;
@@ -573,7 +456,6 @@ static int omap_aes_crypt_dma(struct crypto_tfm *tfm,
dma_async_issue_pending(dd->dma_lch_in);
dma_async_issue_pending(dd->dma_lch_out);
-#endif
/* start DMA or disable idle mode */
omap_aes_write_mask(dd, AES_REG_MASK, AES_REG_MASK_START,
@@ -589,10 +471,8 @@ static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd)
int err, fast = 0, in, out;
size_t count;
dma_addr_t addr_in, addr_out;
-#ifndef OMAP_AES_DMA_PRIVATE
struct scatterlist *in_sg, *out_sg;
int len32;
-#endif
pr_debug("total: %d\n", dd->total);
@@ -631,10 +511,8 @@ static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd)
addr_in = sg_dma_address(dd->in_sg);
addr_out = sg_dma_address(dd->out_sg);
-#ifndef OMAP_AES_DMA_PRIVATE
in_sg = dd->in_sg;
out_sg = dd->out_sg;
-#endif
dd->flags |= FLAGS_FAST;
@@ -643,7 +521,6 @@ static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd)
count = sg_copy(&dd->in_sg, &dd->in_offset, dd->buf_in,
dd->buflen, dd->total, 0);
-#ifndef OMAP_AES_DMA_PRIVATE
len32 = DIV_ROUND_UP(count, DMA_MIN) * DMA_MIN;
/*
@@ -664,7 +541,6 @@ static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd)
in_sg = &dd->in_sgl;
out_sg = &dd->out_sgl;
-#endif
addr_in = dd->dma_addr_in;
addr_out = dd->dma_addr_out;
@@ -675,11 +551,7 @@ static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd)
dd->total -= count;
-#ifdef OMAP_AES_DMA_PRIVATE
- err = omap_aes_crypt_dma(tfm, addr_in, addr_out, count);
-#else
err = omap_aes_crypt_dma(tfm, in_sg, out_sg);
-#endif
if (err) {
dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE);
dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_TO_DEVICE);
@@ -709,13 +581,8 @@ static int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd)
omap_aes_write_mask(dd, AES_REG_MASK, 0, AES_REG_MASK_START);
-#ifdef OMAP_AES_DMA_PRIVATE
- omap_stop_dma(dd->dma_lch_in);
- omap_stop_dma(dd->dma_lch_out);
-#else
dmaengine_terminate_all(dd->dma_lch_in);
dmaengine_terminate_all(dd->dma_lch_out);
-#endif
if (dd->flags & FLAGS_FAST) {
dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE);
--
1.7.12
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