Add support to the nx-842-pseries.c driver for running in little endian
mode.
The pSeries platform NX 842 driver currently only works as big endian.
This adds cpu_to_be*() and be*_to_cpu() in the appropriate places to
work in LE mode also.
Signed-off-by: Dan Streetman <ddstreet@xxxxxxxx>
---
drivers/crypto/nx/Kconfig | 2 +-
drivers/crypto/nx/nx-842-pseries.c | 83 +++++++++++++++++++-------------------
drivers/crypto/nx/nx-842.h | 3 +-
3 files changed, 45 insertions(+), 43 deletions(-)
diff --git a/drivers/crypto/nx/Kconfig b/drivers/crypto/nx/Kconfig
index b1addf6..e421c96 100644
--- a/drivers/crypto/nx/Kconfig
+++ b/drivers/crypto/nx/Kconfig
@@ -24,7 +24,7 @@ if CRYPTO_DEV_NX_COMPRESS
config CRYPTO_DEV_NX_COMPRESS_PSERIES
tristate "Compression acceleration support on pSeries platform"
- depends on PPC_PSERIES && IBMVIO && !CPU_LITTLE_ENDIAN
+ depends on PPC_PSERIES && IBMVIO
default y
help
Support for PowerPC Nest (NX) compression acceleration. This
diff --git a/drivers/crypto/nx/nx-842-pseries.c b/drivers/crypto/nx/nx-842-pseries.c
index da52d8e..3040a60 100644
--- a/drivers/crypto/nx/nx-842-pseries.c
+++ b/drivers/crypto/nx/nx-842-pseries.c
@@ -166,8 +166,8 @@ static unsigned long nx842_get_desired_dma(struct vio_dev *viodev)
}
struct nx842_slentry {
- unsigned long ptr; /* Real address (use __pa()) */
- unsigned long len;
+ __be64 ptr; /* Real address (use __pa()) */
+ __be64 len;
};
/* pHyp scatterlist entry */
@@ -186,30 +186,21 @@ static inline unsigned long nx842_get_scatterlist_size(
static int nx842_build_scatterlist(unsigned long buf, int len,
struct nx842_scatterlist *sl)
{
- unsigned long nextpage;
+ unsigned long entrylen;
struct nx842_slentry *entry;
sl->entry_nr = 0;
entry = sl->entries;
while (len) {
- entry->ptr = nx842_get_pa((void *)buf);
- nextpage = ALIGN(buf + 1, NX842_HW_PAGE_SIZE);
- if (nextpage < buf + len) {
- /* we aren't at the end yet */
- if (IS_ALIGNED(buf, NX842_HW_PAGE_SIZE))
- /* we are in the middle (or beginning) */
- entry->len = NX842_HW_PAGE_SIZE;
- else
- /* we are at the beginning */
- entry->len = nextpage - buf;
- } else {
- /* at the end */
- entry->len = len;
- }
-
- len -= entry->len;
- buf += entry->len;
+ entry->ptr = cpu_to_be64(nx842_get_pa((void *)buf));
+ entrylen = min_t(int, len,
+ LEN_ON_SIZE(buf, NX842_HW_PAGE_SIZE));
+ entry->len = cpu_to_be64(entrylen);
+
+ len -= entrylen;
+ buf += entrylen;
+
sl->entry_nr++;
entry++;
}
@@ -230,8 +221,8 @@ static int nx842_validate_result(struct device *dev,
csb->completion_code,
csb->completion_extension);
dev_dbg(dev, "processed_bytes:%d address:0x%016lx\n",
- csb->processed_byte_count,
- (unsigned long)csb->address);
+ be32_to_cpu(csb->processed_byte_count),
+ (unsigned long)be64_to_cpu(csb->address));
return -EIO;
}
@@ -338,7 +329,6 @@ static int nx842_pseries_compress(const unsigned char *in, unsigned int inlen,
csbcpb = &workmem->csbcpb;
memset(csbcpb, 0, sizeof(*csbcpb));
op.csbcpb = nx842_get_pa(csbcpb);
- op.out = nx842_get_pa(slout.entries);
if ((inbuf & NX842_HW_PAGE_MASK) ==
((inbuf + inlen - 1) & NX842_HW_PAGE_MASK)) {
@@ -364,6 +354,10 @@ static int nx842_pseries_compress(const unsigned char *in, unsigned int inlen,
op.outlen = -nx842_get_scatterlist_size(&slout);
}
+ dev_dbg(dev, "%s: op.in %lx op.inlen %ld op.out %lx op.outlen %ld\n",
+ __func__, (unsigned long)op.in, (long)op.inlen,
+ (unsigned long)op.out, (long)op.outlen);
+
/* Send request to pHyp */
ret = vio_h_cop_sync(local_devdata->vdev, &op);
@@ -380,7 +374,7 @@ static int nx842_pseries_compress(const unsigned char *in, unsigned int inlen,
if (ret)
goto unlock;
- *outlen = csbcpb->csb.processed_byte_count;
+ *outlen = be32_to_cpu(csbcpb->csb.processed_byte_count);
dev_dbg(dev, "%s: processed_bytes=%d\n", __func__, *outlen);
unlock:
@@ -493,6 +487,10 @@ static int nx842_pseries_decompress(const unsigned char *in, unsigned int inlen,
op.outlen = -nx842_get_scatterlist_size(&slout);
}
+ dev_dbg(dev, "%s: op.in %lx op.inlen %ld op.out %lx op.outlen %ld\n",
+ __func__, (unsigned long)op.in, (long)op.inlen,
+ (unsigned long)op.out, (long)op.outlen);
+
/* Send request to pHyp */
ret = vio_h_cop_sync(local_devdata->vdev, &op);
@@ -508,7 +506,7 @@ static int nx842_pseries_decompress(const unsigned char *in, unsigned int inlen,
if (ret)
goto unlock;
- *outlen = csbcpb->csb.processed_byte_count;
+ *outlen = be32_to_cpu(csbcpb->csb.processed_byte_count);
unlock:
if (ret)
@@ -600,16 +598,16 @@ static int nx842_OF_upd_status(struct nx842_devdata *devdata,
static int nx842_OF_upd_maxsglen(struct nx842_devdata *devdata,
struct property *prop) {
int ret = 0;
- const int *maxsglen = prop->value;
+ const unsigned int maxsglen = of_read_number(prop->value, 1);
- if (prop->length != sizeof(*maxsglen)) {
+ if (prop->length != sizeof(maxsglen)) {
dev_err(devdata->dev, "%s: unexpected format for ibm,max-sg-len property\n", __func__);
dev_dbg(devdata->dev, "%s: ibm,max-sg-len is %d bytes long, expected %lu bytes\n", __func__,
- prop->length, sizeof(*maxsglen));
+ prop->length, sizeof(maxsglen));
ret = -EINVAL;
} else {
- devdata->max_sg_len = (unsigned int)min(*maxsglen,
- (int)NX842_HW_PAGE_SIZE);
+ devdata->max_sg_len = min_t(unsigned int,
+ maxsglen, NX842_HW_PAGE_SIZE);
}
return ret;
@@ -648,13 +646,15 @@ static int nx842_OF_upd_maxsglen(struct nx842_devdata *devdata,
static int nx842_OF_upd_maxsyncop(struct nx842_devdata *devdata,
struct property *prop) {
int ret = 0;
+ unsigned int comp_data_limit, decomp_data_limit;
+ unsigned int comp_sg_limit, decomp_sg_limit;
const struct maxsynccop_t {
- int comp_elements;
- int comp_data_limit;
- int comp_sg_limit;
- int decomp_elements;
- int decomp_data_limit;
- int decomp_sg_limit;
+ __be32 comp_elements;
+ __be32 comp_data_limit;
+ __be32 comp_sg_limit;
+ __be32 decomp_elements;
+ __be32 decomp_data_limit;
+ __be32 decomp_sg_limit;
} *maxsynccop;
if (prop->length != sizeof(*maxsynccop)) {
@@ -666,14 +666,16 @@ static int nx842_OF_upd_maxsyncop(struct nx842_devdata *devdata,
}
maxsynccop = (const struct maxsynccop_t *)prop->value;
+ comp_data_limit = be32_to_cpu(maxsynccop->comp_data_limit);
+ comp_sg_limit = be32_to_cpu(maxsynccop->comp_sg_limit);
+ decomp_data_limit = be32_to_cpu(maxsynccop->decomp_data_limit);
+ decomp_sg_limit = be32_to_cpu(maxsynccop->decomp_sg_limit);
/* Use one limit rather than separate limits for compression and
* decompression. Set a maximum for this so as not to exceed the
* size that the header can support and round the value down to
* the hardware page size (4K) */
- devdata->max_sync_size =
- (unsigned int)min(maxsynccop->comp_data_limit,
- maxsynccop->decomp_data_limit);
+ devdata->max_sync_size = min(comp_data_limit, decomp_data_limit);
devdata->max_sync_size = min_t(unsigned int, devdata->max_sync_size,
65536);
@@ -689,8 +691,7 @@ static int nx842_OF_upd_maxsyncop(struct nx842_devdata *devdata,
nx842_pseries_constraints.maximum = devdata->max_sync_size;
- devdata->max_sync_sg = (unsigned int)min(maxsynccop->comp_sg_limit,
- maxsynccop->decomp_sg_limit);
+ devdata->max_sync_sg = min(comp_sg_limit, decomp_sg_limit);
if (devdata->max_sync_sg < 1) {
dev_err(devdata->dev, "%s: hardware max sg size (%u) is "
"less than the driver minimum, unable to use "
diff --git a/drivers/crypto/nx/nx-842.h b/drivers/crypto/nx/nx-842.h
index f6821b6..ac0ea79 100644
--- a/drivers/crypto/nx/nx-842.h
+++ b/drivers/crypto/nx/nx-842.h
@@ -88,7 +88,8 @@
#define CCB_CM_EXTRA_WRITE (CCB_CM0_ALL_COMPLETIONS & CCB_CM12_STORE)
#define CCB_CM_INTERRUPT (CCB_CM0_ALL_COMPLETIONS & CCB_CM12_INTERRUPT)
-#define LEN_ON_PAGE(pa) (PAGE_SIZE - ((pa) & ~PAGE_MASK))
+#define LEN_ON_SIZE(pa, size) ((size) - ((pa) & ((size) - 1)))
+#define LEN_ON_PAGE(pa) LEN_ON_SIZE(pa, PAGE_SIZE)
static inline unsigned long nx842_get_pa(void *addr)
{
--
2.1.0
--
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