[PATCH v3 7/7] crypto: omap_sham: Remove usage of private DMA API
Mark A. Greer
mgreer at animalcreek.com
Tue Nov 6 21:57:13 EST 2012
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-sham.c | 117 ---------------------------------------------
1 file changed, 117 deletions(-)
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index b57277c..ebb5255 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -13,8 +13,6 @@
* Some ideas are from old omap-sha1-md5.c driver.
*/
-#define OMAP_SHAM_DMA_PRIVATE
-
#define pr_fmt(fmt) "%s: " fmt, __func__
#include <linux/err.h>
@@ -29,10 +27,8 @@
#include <linux/platform_device.h>
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
-#ifndef OMAP_SHAM_DMA_PRIVATE
#include <linux/dmaengine.h>
#include <linux/omap-dma.h>
-#endif
#include <linux/pm_runtime.h>
#include <linux/delay.h>
#include <linux/crypto.h>
@@ -43,12 +39,6 @@
#include <crypto/hash.h>
#include <crypto/internal/hash.h>
-#ifdef OMAP_SHAM_DMA_PRIVATE
-#include <plat/cpu.h>
-#include <plat/dma.h>
-#include <mach/irqs.h>
-#endif
-
#define SHA_REG_DIGEST(x) (0x00 + ((x) * 0x04))
#define SHA_REG_DIN(x) (0x1C + ((x) * 0x04))
@@ -120,9 +110,7 @@ struct omap_sham_reqctx {
/* walk state */
struct scatterlist *sg;
-#ifndef OMAP_SHAM_DMA_PRIVATE
struct scatterlist sgl;
-#endif
unsigned int offset; /* offset in current sg */
unsigned int total; /* total request */
@@ -156,12 +144,7 @@ struct omap_sham_dev {
int irq;
spinlock_t lock;
int err;
-#ifdef OMAP_SHAM_DMA_PRIVATE
- int dma;
- int dma_lch;
-#else
struct dma_chan *dma_lch;
-#endif
struct tasklet_struct done_task;
unsigned long flags;
@@ -331,7 +314,6 @@ static int omap_sham_xmit_cpu(struct omap_sham_dev *dd, const u8 *buf,
return -EINPROGRESS;
}
-#ifndef OMAP_SHAM_DMA_PRIVATE
static void omap_sham_dma_callback(void *param)
{
struct omap_sham_dev *dd = param;
@@ -339,34 +321,18 @@ static void omap_sham_dma_callback(void *param)
set_bit(FLAGS_DMA_READY, &dd->flags);
tasklet_schedule(&dd->done_task);
}
-#endif
static int omap_sham_xmit_dma(struct omap_sham_dev *dd, dma_addr_t dma_addr,
size_t length, int final, int is_sg)
{
struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
-#ifdef OMAP_SHAM_DMA_PRIVATE
- int len32;
-#else
struct dma_async_tx_descriptor *tx;
struct dma_slave_config cfg;
int ret;
-#endif
dev_dbg(dd->dev, "xmit_dma: digcnt: %d, length: %d, final: %d\n",
ctx->digcnt, length, final);
-#ifdef OMAP_SHAM_DMA_PRIVATE
- len32 = DIV_ROUND_UP(length, sizeof(u32));
-
- omap_set_dma_transfer_params(dd->dma_lch, OMAP_DMA_DATA_TYPE_S32, len32,
- 1, OMAP_DMA_SYNC_PACKET, dd->dma,
- OMAP_DMA_DST_SYNC_PREFETCH);
-
- omap_set_dma_src_params(dd->dma_lch, 0, OMAP_DMA_AMODE_POST_INC,
- dma_addr, 0, 0);
-
-#else
memset(&cfg, 0, sizeof(cfg));
cfg.dst_addr = dd->phys_base + SHA_REG_DIN(0);
@@ -406,7 +372,6 @@ static int omap_sham_xmit_dma(struct omap_sham_dev *dd, dma_addr_t dma_addr,
tx->callback = omap_sham_dma_callback;
tx->callback_param = dd;
-#endif
omap_sham_write_ctrl(dd, length, final, 1);
@@ -417,12 +382,8 @@ static int omap_sham_xmit_dma(struct omap_sham_dev *dd, dma_addr_t dma_addr,
set_bit(FLAGS_DMA_ACTIVE, &dd->flags);
-#ifdef OMAP_SHAM_DMA_PRIVATE
- omap_start_dma(dd->dma_lch);
-#else
dmaengine_submit(tx);
dma_async_issue_pending(dd->dma_lch);
-#endif
return -EINPROGRESS;
}
@@ -528,7 +489,6 @@ static int omap_sham_update_dma_start(struct omap_sham_dev *dd)
if (ctx->bufcnt || ctx->offset)
return omap_sham_update_dma_slow(dd);
-#ifndef OMAP_SHAM_DMA_PRIVATE
/*
* Don't use the sg interface when the transfer size is less
* than the number of elements in a DMA frame. Otherwise,
@@ -537,7 +497,6 @@ static int omap_sham_update_dma_start(struct omap_sham_dev *dd)
*/
if (ctx->total < (DST_MAXBURST * sizeof(u32)))
return omap_sham_update_dma_slow(dd);
-#endif
dev_dbg(dd->dev, "fast: digcnt: %d, bufcnt: %u, total: %u\n",
ctx->digcnt, ctx->bufcnt, ctx->total);
@@ -599,11 +558,7 @@ static int omap_sham_update_dma_stop(struct omap_sham_dev *dd)
{
struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req);
-#ifdef OMAP_SHAM_DMA_PRIVATE
- omap_stop_dma(dd->dma_lch);
-#else
dmaengine_terminate_all(dd->dma_lch);
-#endif
if (ctx->flags & BIT(FLAGS_SG)) {
dma_unmap_sg(dd->dev, ctx->sg, 1, DMA_TO_DEVICE);
@@ -807,18 +762,6 @@ static int omap_sham_handle_queue(struct omap_sham_dev *dd,
if (err)
goto err1;
-#ifdef OMAP_SHAM_DMA_PRIVATE
- omap_set_dma_dest_params(dd->dma_lch, 0,
- OMAP_DMA_AMODE_CONSTANT,
- dd->phys_base + SHA_REG_DIN(0), 0, 16);
-
- omap_set_dma_dest_burst_mode(dd->dma_lch,
- OMAP_DMA_DATA_BURST_16);
-
- omap_set_dma_src_burst_mode(dd->dma_lch,
- OMAP_DMA_DATA_BURST_4);
-#endif
-
if (ctx->digcnt)
/* request has changed - restore hash */
omap_sham_copy_hash(req, 0);
@@ -1209,55 +1152,13 @@ static irqreturn_t omap_sham_irq(int irq, void *dev_id)
return IRQ_HANDLED;
}
-#ifdef OMAP_SHAM_DMA_PRIVATE
-static void omap_sham_dma_callback(int lch, u16 ch_status, void *data)
-{
- struct omap_sham_dev *dd = data;
-
- if (ch_status != OMAP_DMA_BLOCK_IRQ) {
- pr_err("omap-sham DMA error status: 0x%hx\n", ch_status);
- dd->err = -EIO;
- clear_bit(FLAGS_INIT, &dd->flags);/* request to re-initialize */
- }
-
- set_bit(FLAGS_DMA_READY, &dd->flags);
- tasklet_schedule(&dd->done_task);
-}
-
-static int omap_sham_dma_init(struct omap_sham_dev *dd)
-{
- int err;
-
- dd->dma_lch = -1;
-
- err = omap_request_dma(dd->dma, dev_name(dd->dev),
- omap_sham_dma_callback, dd, &dd->dma_lch);
- if (err) {
- dev_err(dd->dev, "Unable to request DMA channel\n");
- return err;
- }
-
- return 0;
-}
-
-static void omap_sham_dma_cleanup(struct omap_sham_dev *dd)
-{
- if (dd->dma_lch >= 0) {
- omap_free_dma(dd->dma_lch);
- dd->dma_lch = -1;
- }
-}
-#endif
-
static int __devinit omap_sham_probe(struct platform_device *pdev)
{
struct omap_sham_dev *dd;
struct device *dev = &pdev->dev;
struct resource *res;
-#ifndef OMAP_SHAM_DMA_PRIVATE
dma_cap_mask_t mask;
unsigned dma_chan;
-#endif
int err, i, j;
dd = kzalloc(sizeof(struct omap_sham_dev), GFP_KERNEL);
@@ -1292,11 +1193,7 @@ static int __devinit omap_sham_probe(struct platform_device *pdev)
err = -ENODEV;
goto res_err;
}
-#ifdef OMAP_SHAM_DMA_PRIVATE
- dd->dma = res->start;
-#else
dma_chan = res->start;
-#endif
/* Get the IRQ */
dd->irq = platform_get_irq(pdev, 0);
@@ -1313,11 +1210,6 @@ static int __devinit omap_sham_probe(struct platform_device *pdev)
goto res_err;
}
-#ifdef OMAP_SHAM_DMA_PRIVATE
- err = omap_sham_dma_init(dd);
- if (err)
- goto dma_err;
-#else
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
@@ -1328,7 +1220,6 @@ static int __devinit omap_sham_probe(struct platform_device *pdev)
err = -ENXIO;
goto dma_err;
}
-#endif
dd->io_base = ioremap(dd->phys_base, SZ_4K);
if (!dd->io_base) {
@@ -1364,11 +1255,7 @@ err_algs:
iounmap(dd->io_base);
pm_runtime_disable(dev);
io_err:
-#ifdef OMAP_SHAM_DMA_PRIVATE
- omap_sham_dma_cleanup(dd);
-#else
dma_release_channel(dd->dma_lch);
-#endif
dma_err:
if (dd->irq >= 0)
free_irq(dd->irq, dd);
@@ -1397,11 +1284,7 @@ static int __devexit omap_sham_remove(struct platform_device *pdev)
tasklet_kill(&dd->done_task);
iounmap(dd->io_base);
pm_runtime_disable(&pdev->dev);
-#ifdef OMAP_SHAM_DMA_PRIVATE
- omap_sham_dma_cleanup(dd);
-#else
dma_release_channel(dd->dma_lch);
-#endif
if (dd->irq >= 0)
free_irq(dd->irq, dd);
kfree(dd);
--
1.7.12
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