Signed-off-by: Phil Sutter <[email protected]>
---
drivers/crypto/dma_desclist.h | 79 +++++++++++++++++++++++++++++++++++
drivers/crypto/mv_cesa.c | 81 +++++++++----------------------------
drivers/crypto/mv_tdma.c | 91 ++++++++++++-----------------------------
3 files changed, 125 insertions(+), 126 deletions(-)
create mode 100644 drivers/crypto/dma_desclist.h
diff --git a/drivers/crypto/dma_desclist.h b/drivers/crypto/dma_desclist.h
new file mode 100644
index 0000000..c471ad6
--- /dev/null
+++ b/drivers/crypto/dma_desclist.h
@@ -0,0 +1,79 @@
+#ifndef __DMA_DESCLIST__
+#define __DMA_DESCLIST__
+
+struct dma_desc {
+ void *virt;
+ dma_addr_t phys;
+};
+
+struct dma_desclist {
+ struct dma_pool *itempool;
+ struct dma_desc *desclist;
+ unsigned long length;
+ unsigned long usage;
+};
+
+#define DESCLIST_ITEM(dl, x) ((dl).desclist[(x)].virt)
+#define DESCLIST_ITEM_DMA(dl, x) ((dl).desclist[(x)].phys)
+#define DESCLIST_FULL(dl) ((dl).length == (dl).usage)
+
+static inline int
+init_dma_desclist(struct dma_desclist *dl, struct device *dev,
+ size_t size, size_t align, size_t boundary)
+{
+#define STRX(x) #x
+#define STR(x) STRX(x)
+ dl->itempool = dma_pool_create(
+ "DMA Desclist Pool at "__FILE__"("STR(__LINE__)")",
+ dev, size, align, boundary);
+#undef STR
+#undef STRX
+ if (!dl->itempool)
+ return 1;
+ dl->desclist = NULL;
+ dl->length = dl->usage = 0;
+ return 0;
+}
+
+static inline int
+set_dma_desclist_size(struct dma_desclist *dl, unsigned long nelem)
+{
+ /* need to increase size first if requested */
+ if (nelem > dl->length) {
+ struct dma_desc *newmem;
+ int newsize = nelem * sizeof(struct dma_desc);
+
+ newmem = krealloc(dl->desclist, newsize, GFP_KERNEL);
+ if (!newmem)
+ return -ENOMEM;
+ dl->desclist = newmem;
+ }
+
+ /* allocate/free dma descriptors, adjusting dl->length on the go */
+ for (; dl->length < nelem; dl->length++) {
+ DESCLIST_ITEM(*dl, dl->length) = dma_pool_alloc(dl->itempool,
+ GFP_KERNEL, &DESCLIST_ITEM_DMA(*dl,
dl->length));
+ if (!DESCLIST_ITEM(*dl, dl->length))
+ return -ENOMEM;
+ }
+ for (; dl->length > nelem; dl->length--)
+ dma_pool_free(dl->itempool, DESCLIST_ITEM(*dl, dl->length - 1),
+ DESCLIST_ITEM_DMA(*dl, dl->length - 1));
+
+ /* ignore size decreases but those to zero */
+ if (!nelem) {
+ kfree(dl->desclist);
+ dl->desclist = 0;
+ }
+ return 0;
+}
+
+static inline void
+fini_dma_desclist(struct dma_desclist *dl)
+{
+ set_dma_desclist_size(dl, 0);
+ dma_pool_destroy(dl->itempool);
+ dl->length = dl->usage = 0;
+}
+
+#endif /* __DMA_DESCLIST__ */
diff --git a/drivers/crypto/mv_cesa.c b/drivers/crypto/mv_cesa.c
index 9a2f413..367aa18 100644
--- a/drivers/crypto/mv_cesa.c
+++ b/drivers/crypto/mv_cesa.c
@@ -23,6 +23,7 @@
#include "mv_cesa.h"
#include "mv_tdma.h"
+#include "dma_desclist.h"
#define MV_CESA "MV-CESA:"
#define MAX_HW_HASH_SIZE 0xFFFF
@@ -99,11 +100,6 @@ struct sec_accel_sram {
#define sa_ivo type.hash.ivo
} __attribute__((packed));
-struct u32_mempair {
- u32 *vaddr;
- dma_addr_t daddr;
-};
-
struct crypto_priv {
struct device *dev;
void __iomem *reg;
@@ -127,14 +123,14 @@ struct crypto_priv {
struct sec_accel_sram sa_sram;
dma_addr_t sa_sram_dma;
- struct dma_pool *u32_pool;
- struct u32_mempair *u32_list;
- int u32_list_len;
- int u32_usage;
+ struct dma_desclist desclist;
};
static struct crypto_priv *cpg;
+#define ITEM(x) ((u32 *)DESCLIST_ITEM(cpg->desclist, x))
+#define ITEM_DMA(x) DESCLIST_ITEM_DMA(cpg->desclist, x)
+
struct mv_ctx {
u8 aes_enc_key[AES_KEY_LEN];
u32 aes_dec_key[8];
@@ -202,52 +198,17 @@ static void mv_setup_timer(void)
jiffies + msecs_to_jiffies(MV_CESA_EXPIRE));
}
-#define U32_ITEM(x) (cpg->u32_list[x].vaddr)
-#define U32_ITEM_DMA(x) (cpg->u32_list[x].daddr)
-
-static inline int set_u32_poolsize(int nelem)
-{
- /* need to increase size first if requested */
- if (nelem > cpg->u32_list_len) {
- struct u32_mempair *newmem;
- int newsize = nelem * sizeof(struct u32_mempair);
-
- newmem = krealloc(cpg->u32_list, newsize, GFP_KERNEL);
- if (!newmem)
- return -ENOMEM;
- cpg->u32_list = newmem;
- }
-
- /* allocate/free dma descriptors, adjusting cpg->u32_list_len on the go
*/
- for (; cpg->u32_list_len < nelem; cpg->u32_list_len++) {
- U32_ITEM(cpg->u32_list_len) = dma_pool_alloc(cpg->u32_pool,
- GFP_KERNEL, &U32_ITEM_DMA(cpg->u32_list_len));
- if (!U32_ITEM((cpg->u32_list_len)))
- return -ENOMEM;
- }
- for (; cpg->u32_list_len > nelem; cpg->u32_list_len--)
- dma_pool_free(cpg->u32_pool, U32_ITEM(cpg->u32_list_len - 1),
- U32_ITEM_DMA(cpg->u32_list_len - 1));
-
- /* ignore size decreases but those to zero */
- if (!nelem) {
- kfree(cpg->u32_list);
- cpg->u32_list = 0;
- }
- return 0;
-}
-
static inline void mv_tdma_u32_copy(dma_addr_t dst, u32 val)
{
- if (unlikely(cpg->u32_usage == cpg->u32_list_len)
- && set_u32_poolsize(cpg->u32_list_len << 1)) {
- printk(KERN_ERR MV_CESA "resizing poolsize to %d failed\n",
- cpg->u32_list_len << 1);
+ if (unlikely(DESCLIST_FULL(cpg->desclist)) &&
+ set_dma_desclist_size(&cpg->desclist, cpg->desclist.length << 1)) {
+ printk(KERN_ERR MV_CESA "resizing poolsize to %lu failed\n",
+ cpg->desclist.length << 1);
return;
}
- *(U32_ITEM(cpg->u32_usage)) = val;
- mv_tdma_memcpy(dst, U32_ITEM_DMA(cpg->u32_usage), sizeof(u32));
- cpg->u32_usage++;
+ *ITEM(cpg->desclist.usage) = val;
+ mv_tdma_memcpy(dst, ITEM_DMA(cpg->desclist.usage), sizeof(u32));
+ cpg->desclist.usage++;
}
static inline bool
@@ -649,7 +610,7 @@ static void dequeue_complete_req(void)
struct crypto_async_request *req = cpg->cur_req;
mv_tdma_clear();
- cpg->u32_usage = 0;
+ cpg->desclist.usage = 0;
BUG_ON(cpg->eng_st != ENGINE_W_DEQUEUE);
@@ -1326,13 +1287,12 @@ static int mv_probe(struct platform_device *pdev)
cp->sa_sram_dma = dma_map_single(&pdev->dev, &cp->sa_sram,
sizeof(struct sec_accel_sram), DMA_TO_DEVICE);
- cpg->u32_pool = dma_pool_create("CESA U32 Item Pool",
- &pdev->dev, sizeof(u32), MV_DMA_ALIGN, 0);
- if (!cpg->u32_pool) {
+ if (init_dma_desclist(&cpg->desclist, &pdev->dev,
+ sizeof(u32), MV_DMA_ALIGN, 0)) {
ret = -ENOMEM;
goto err_mapping;
}
- if (set_u32_poolsize(MV_DMA_INIT_POOLSIZE)) {
+ if (set_dma_desclist_size(&cpg->desclist, MV_DMA_INIT_POOLSIZE)) {
printk(KERN_ERR MV_CESA "failed to initialise poolsize\n");
goto err_pool;
}
@@ -1341,7 +1301,7 @@ static int mv_probe(struct platform_device *pdev)
if (ret) {
printk(KERN_WARNING MV_CESA
"Could not register aes-ecb driver\n");
- goto err_poolsize;
+ goto err_pool;
}
ret = crypto_register_alg(&mv_aes_alg_cbc);
@@ -1368,10 +1328,8 @@ static int mv_probe(struct platform_device *pdev)
return 0;
err_unreg_ecb:
crypto_unregister_alg(&mv_aes_alg_ecb);
-err_poolsize:
- set_u32_poolsize(0);
err_pool:
- dma_pool_destroy(cpg->u32_pool);
+ fini_dma_desclist(&cpg->desclist);
err_mapping:
dma_unmap_single(&pdev->dev, cpg->sa_sram_dma,
sizeof(struct sec_accel_sram), DMA_TO_DEVICE);
@@ -1403,8 +1361,7 @@ static int mv_remove(struct platform_device *pdev)
free_irq(cp->irq, cp);
dma_unmap_single(&pdev->dev, cpg->sa_sram_dma,
sizeof(struct sec_accel_sram), DMA_TO_DEVICE);
- set_u32_poolsize(0);
- dma_pool_destroy(cpg->u32_pool);
+ fini_dma_desclist(&cpg->desclist);
memset(cp->sram, 0, cp->sram_size);
iounmap(cp->sram);
iounmap(cp->reg);
diff --git a/drivers/crypto/mv_tdma.c b/drivers/crypto/mv_tdma.c
index aa5316a..d8e8c3f 100644
--- a/drivers/crypto/mv_tdma.c
+++ b/drivers/crypto/mv_tdma.c
@@ -17,6 +17,7 @@
#include <linux/platform_device.h>
#include "mv_tdma.h"
+#include "dma_desclist.h"
#define MV_TDMA "MV-TDMA: "
@@ -30,57 +31,17 @@ struct tdma_desc {
u32 next;
} __attribute__((packed));
-struct desc_mempair {
- struct tdma_desc *vaddr;
- dma_addr_t daddr;
-};
-
struct tdma_priv {
struct device *dev;
void __iomem *reg;
int irq;
/* protecting the dma descriptors and stuff */
spinlock_t lock;
- struct dma_pool *descpool;
- struct desc_mempair *desclist;
- int desclist_len;
- int desc_usage;
+ struct dma_desclist desclist;
} tpg;
-#define DESC(x) (tpg.desclist[x].vaddr)
-#define DESC_DMA(x) (tpg.desclist[x].daddr)
-
-static inline int set_poolsize(int nelem)
-{
- /* need to increase size first if requested */
- if (nelem > tpg.desclist_len) {
- struct desc_mempair *newmem;
- int newsize = nelem * sizeof(struct desc_mempair);
-
- newmem = krealloc(tpg.desclist, newsize, GFP_KERNEL);
- if (!newmem)
- return -ENOMEM;
- tpg.desclist = newmem;
- }
-
- /* allocate/free dma descriptors, adjusting tpg.desclist_len on the go
*/
- for (; tpg.desclist_len < nelem; tpg.desclist_len++) {
- DESC(tpg.desclist_len) = dma_pool_alloc(tpg.descpool,
- GFP_KERNEL, &DESC_DMA(tpg.desclist_len));
- if (!DESC((tpg.desclist_len)))
- return -ENOMEM;
- }
- for (; tpg.desclist_len > nelem; tpg.desclist_len--)
- dma_pool_free(tpg.descpool, DESC(tpg.desclist_len - 1),
- DESC_DMA(tpg.desclist_len - 1));
-
- /* ignore size decreases but those to zero */
- if (!nelem) {
- kfree(tpg.desclist);
- tpg.desclist = 0;
- }
- return 0;
-}
+#define ITEM(x) ((struct tdma_desc
*)DESCLIST_ITEM(tpg.desclist, x))
+#define ITEM_DMA(x) DESCLIST_ITEM_DMA(tpg.desclist, x)
static inline void wait_for_tdma_idle(void)
{
@@ -100,17 +61,18 @@ static inline void switch_tdma_engine(bool state)
static struct tdma_desc *get_new_last_desc(void)
{
- if (unlikely(tpg.desc_usage == tpg.desclist_len) &&
- set_poolsize(tpg.desclist_len << 1)) {
- printk(KERN_ERR MV_TDMA "failed to increase DMA pool to %d\n",
- tpg.desclist_len << 1);
+ if (unlikely(DESCLIST_FULL(tpg.desclist)) &&
+ set_dma_desclist_size(&tpg.desclist, tpg.desclist.length << 1)) {
+ printk(KERN_ERR MV_TDMA "failed to increase DMA pool to %lu\n",
+ tpg.desclist.length << 1);
return NULL;
}
- if (likely(tpg.desc_usage))
- DESC(tpg.desc_usage - 1)->next = DESC_DMA(tpg.desc_usage);
+ if (likely(tpg.desclist.usage))
+ ITEM(tpg.desclist.usage - 1)->next =
+ ITEM_DMA(tpg.desclist.usage);
- return DESC(tpg.desc_usage++);
+ return ITEM(tpg.desclist.usage++);
}
static inline void mv_tdma_desc_dump(void)
@@ -118,17 +80,17 @@ static inline void mv_tdma_desc_dump(void)
struct tdma_desc *tmp;
int i;
- if (!tpg.desc_usage) {
+ if (!tpg.desclist.usage) {
printk(KERN_WARNING MV_TDMA "DMA descriptor list is empty\n");
return;
}
printk(KERN_WARNING MV_TDMA "DMA descriptor list:\n");
- for (i = 0; i < tpg.desc_usage; i++) {
- tmp = DESC(i);
+ for (i = 0; i < tpg.desclist.usage; i++) {
+ tmp = ITEM(i);
printk(KERN_WARNING MV_TDMA "entry %d at 0x%x: dma addr 0x%x, "
"src 0x%x, dst 0x%x, count %u, own %d, next 0x%x", i,
- (u32)tmp, DESC_DMA(i) , tmp->src, tmp->dst,
+ (u32)tmp, ITEM_DMA(i) , tmp->src, tmp->dst,
tmp->count & ~TDMA_OWN_BIT, !!(tmp->count &
TDMA_OWN_BIT),
tmp->next);
}
@@ -167,7 +129,7 @@ void mv_tdma_clear(void)
writel(0, tpg.reg + TDMA_CURR_DESC);
writel(0, tpg.reg + TDMA_NEXT_DESC);
- tpg.desc_usage = 0;
+ tpg.desclist.usage = 0;
switch_tdma_engine(1);
@@ -183,7 +145,7 @@ void mv_tdma_trigger(void)
spin_lock(&tpg.lock);
- writel(DESC_DMA(0), tpg.reg + TDMA_NEXT_DESC);
+ writel(ITEM_DMA(0), tpg.reg + TDMA_NEXT_DESC);
spin_unlock(&tpg.lock);
}
@@ -287,13 +249,15 @@ static int mv_probe(struct platform_device *pdev)
goto out_unmap_reg;
}
- tpg.descpool = dma_pool_create("TDMA Descriptor Pool", tpg.dev,
- sizeof(struct tdma_desc), MV_DMA_ALIGN, 0);
- if (!tpg.descpool) {
+ if (init_dma_desclist(&tpg.desclist, tpg.dev,
+ sizeof(struct tdma_desc), MV_DMA_ALIGN, 0)) {
rc = -ENOMEM;
goto out_free_irq;
}
- set_poolsize(MV_DMA_INIT_POOLSIZE);
+ if (set_dma_desclist_size(&tpg.desclist, MV_DMA_INIT_POOLSIZE)) {
+ rc = -ENOMEM;
+ goto out_free_desclist;
+ }
platform_set_drvdata(pdev, &tpg);
@@ -327,8 +291,8 @@ static int mv_probe(struct platform_device *pdev)
out_free_all:
switch_tdma_engine(0);
platform_set_drvdata(pdev, NULL);
- set_poolsize(0);
- dma_pool_destroy(tpg.descpool);
+out_free_desclist:
+ fini_dma_desclist(&tpg.desclist);
out_free_irq:
free_irq(tpg.irq, &tpg);
out_unmap_reg:
@@ -341,8 +305,7 @@ static int mv_remove(struct platform_device *pdev)
{
switch_tdma_engine(0);
platform_set_drvdata(pdev, NULL);
- set_poolsize(0);
- dma_pool_destroy(tpg.descpool);
+ fini_dma_desclist(&tpg.desclist);
free_irq(tpg.irq, &tpg);
iounmap(tpg.reg);
tpg.dev = NULL;
--
1.7.3.4
--
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