soc: qcom: smd: Handle big endian CPUs
The smd structures are always in little endian, but the smd
driver is not capable of being used on big endian CPUs. Annotate
the little endian data members and update the code to do the
proper byte swapping.
Cc: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Andy Gross <agross@codeaurora.org>
diff --git a/drivers/soc/qcom/smd.c b/drivers/soc/qcom/smd.c
index f9768bf..18964f1 100644
--- a/drivers/soc/qcom/smd.c
+++ b/drivers/soc/qcom/smd.c
@@ -212,7 +212,7 @@
* Format of the smd_info smem items, for byte aligned channels.
*/
struct smd_channel_info {
- u32 state;
+ __le32 state;
u8 fDSR;
u8 fCTS;
u8 fCD;
@@ -221,8 +221,8 @@
u8 fTAIL;
u8 fSTATE;
u8 fBLOCKREADINTR;
- u32 tail;
- u32 head;
+ __le32 tail;
+ __le32 head;
};
struct smd_channel_info_pair {
@@ -234,17 +234,17 @@
* Format of the smd_info smem items, for word aligned channels.
*/
struct smd_channel_info_word {
- u32 state;
- u32 fDSR;
- u32 fCTS;
- u32 fCD;
- u32 fRI;
- u32 fHEAD;
- u32 fTAIL;
- u32 fSTATE;
- u32 fBLOCKREADINTR;
- u32 tail;
- u32 head;
+ __le32 state;
+ __le32 fDSR;
+ __le32 fCTS;
+ __le32 fCD;
+ __le32 fRI;
+ __le32 fHEAD;
+ __le32 fTAIL;
+ __le32 fSTATE;
+ __le32 fBLOCKREADINTR;
+ __le32 tail;
+ __le32 head;
};
struct smd_channel_info_word_pair {
@@ -252,25 +252,73 @@
struct smd_channel_info_word rx;
};
-#define GET_RX_CHANNEL_INFO(channel, param) \
- (channel->info_word ? \
- channel->info_word->rx.param : \
- channel->info->rx.param)
+#define GET_RX_CHANNEL_FLAG(channel, param) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->rx.param) != sizeof(u8)); \
+ channel->info_word ? \
+ le32_to_cpu(channel->info_word->rx.param) : \
+ channel->info->rx.param; \
+ })
-#define SET_RX_CHANNEL_INFO(channel, param, value) \
- (channel->info_word ? \
- (channel->info_word->rx.param = value) : \
- (channel->info->rx.param = value))
+#define GET_RX_CHANNEL_INFO(channel, param) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->rx.param) != sizeof(u32)); \
+ le32_to_cpu(channel->info_word ? \
+ channel->info_word->rx.param : \
+ channel->info->rx.param); \
+ })
-#define GET_TX_CHANNEL_INFO(channel, param) \
- (channel->info_word ? \
- channel->info_word->tx.param : \
- channel->info->tx.param)
+#define SET_RX_CHANNEL_FLAG(channel, param, value) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->rx.param) != sizeof(u8)); \
+ if (channel->info_word) \
+ channel->info_word->rx.param = cpu_to_le32(value); \
+ else \
+ channel->info->rx.param = value; \
+ })
-#define SET_TX_CHANNEL_INFO(channel, param, value) \
- (channel->info_word ? \
- (channel->info_word->tx.param = value) : \
- (channel->info->tx.param = value))
+#define SET_RX_CHANNEL_INFO(channel, param, value) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->rx.param) != sizeof(u32)); \
+ if (channel->info_word) \
+ channel->info_word->rx.param = cpu_to_le32(value); \
+ else \
+ channel->info->rx.param = cpu_to_le32(value); \
+ })
+
+#define GET_TX_CHANNEL_FLAG(channel, param) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->tx.param) != sizeof(u8)); \
+ channel->info_word ? \
+ le32_to_cpu(channel->info_word->tx.param) : \
+ channel->info->tx.param; \
+ })
+
+#define GET_TX_CHANNEL_INFO(channel, param) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->tx.param) != sizeof(u32)); \
+ le32_to_cpu(channel->info_word ? \
+ channel->info_word->tx.param : \
+ channel->info->tx.param); \
+ })
+
+#define SET_TX_CHANNEL_FLAG(channel, param, value) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->tx.param) != sizeof(u8)); \
+ if (channel->info_word) \
+ channel->info_word->tx.param = cpu_to_le32(value); \
+ else \
+ channel->info->tx.param = value; \
+ })
+
+#define SET_TX_CHANNEL_INFO(channel, param, value) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->tx.param) != sizeof(u32)); \
+ if (channel->info_word) \
+ channel->info_word->tx.param = cpu_to_le32(value); \
+ else \
+ channel->info->tx.param = cpu_to_le32(value); \
+ })
/**
* struct qcom_smd_alloc_entry - channel allocation entry
@@ -281,9 +329,9 @@
*/
struct qcom_smd_alloc_entry {
u8 name[20];
- u32 cid;
- u32 flags;
- u32 ref_count;
+ __le32 cid;
+ __le32 flags;
+ __le32 ref_count;
} __packed;
#define SMD_CHANNEL_FLAGS_EDGE_MASK 0xff
@@ -312,14 +360,14 @@
static void qcom_smd_channel_reset(struct qcom_smd_channel *channel)
{
SET_TX_CHANNEL_INFO(channel, state, SMD_CHANNEL_CLOSED);
- SET_TX_CHANNEL_INFO(channel, fDSR, 0);
- SET_TX_CHANNEL_INFO(channel, fCTS, 0);
- SET_TX_CHANNEL_INFO(channel, fCD, 0);
- SET_TX_CHANNEL_INFO(channel, fRI, 0);
- SET_TX_CHANNEL_INFO(channel, fHEAD, 0);
- SET_TX_CHANNEL_INFO(channel, fTAIL, 0);
- SET_TX_CHANNEL_INFO(channel, fSTATE, 1);
- SET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR, 1);
+ SET_TX_CHANNEL_FLAG(channel, fDSR, 0);
+ SET_TX_CHANNEL_FLAG(channel, fCTS, 0);
+ SET_TX_CHANNEL_FLAG(channel, fCD, 0);
+ SET_TX_CHANNEL_FLAG(channel, fRI, 0);
+ SET_TX_CHANNEL_FLAG(channel, fHEAD, 0);
+ SET_TX_CHANNEL_FLAG(channel, fTAIL, 0);
+ SET_TX_CHANNEL_FLAG(channel, fSTATE, 1);
+ SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 1);
SET_TX_CHANNEL_INFO(channel, head, 0);
SET_TX_CHANNEL_INFO(channel, tail, 0);
@@ -357,12 +405,12 @@
dev_dbg(edge->smd->dev, "set_state(%s, %d)\n", channel->name, state);
- SET_TX_CHANNEL_INFO(channel, fDSR, is_open);
- SET_TX_CHANNEL_INFO(channel, fCTS, is_open);
- SET_TX_CHANNEL_INFO(channel, fCD, is_open);
+ SET_TX_CHANNEL_FLAG(channel, fDSR, is_open);
+ SET_TX_CHANNEL_FLAG(channel, fCTS, is_open);
+ SET_TX_CHANNEL_FLAG(channel, fCD, is_open);
SET_TX_CHANNEL_INFO(channel, state, state);
- SET_TX_CHANNEL_INFO(channel, fSTATE, 1);
+ SET_TX_CHANNEL_FLAG(channel, fSTATE, 1);
channel->state = state;
qcom_smd_signal_channel(channel);
@@ -397,7 +445,7 @@
if (word_aligned) {
count /= sizeof(u32);
while (count--)
- *dst++ = readl_relaxed(src++);
+ *dst++ = __raw_readl(src++);
} else {
memcpy_fromio(_dst, _src, count);
}
@@ -493,7 +541,7 @@
{
bool need_state_scan = false;
int remote_state;
- u32 pktlen;
+ __le32 pktlen;
int avail;
int ret;
@@ -504,10 +552,10 @@
need_state_scan = true;
}
/* Indicate that we have seen any state change */
- SET_RX_CHANNEL_INFO(channel, fSTATE, 0);
+ SET_RX_CHANNEL_FLAG(channel, fSTATE, 0);
/* Signal waiting qcom_smd_send() about the interrupt */
- if (!GET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR))
+ if (!GET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR))
wake_up_interruptible(&channel->fblockread_event);
/* Don't consume any data until we've opened the channel */
@@ -515,7 +563,7 @@
goto out;
/* Indicate that we've seen the new data */
- SET_RX_CHANNEL_INFO(channel, fHEAD, 0);
+ SET_RX_CHANNEL_FLAG(channel, fHEAD, 0);
/* Consume data */
for (;;) {
@@ -524,7 +572,7 @@
if (!channel->pkt_size && avail >= SMD_PACKET_HEADER_LEN) {
qcom_smd_channel_peek(channel, &pktlen, sizeof(pktlen));
qcom_smd_channel_advance(channel, SMD_PACKET_HEADER_LEN);
- channel->pkt_size = pktlen;
+ channel->pkt_size = le32_to_cpu(pktlen);
} else if (channel->pkt_size && avail >= channel->pkt_size) {
ret = qcom_smd_channel_recv_single(channel);
if (ret)
@@ -535,10 +583,10 @@
}
/* Indicate that we have seen and updated tail */
- SET_RX_CHANNEL_INFO(channel, fTAIL, 1);
+ SET_RX_CHANNEL_FLAG(channel, fTAIL, 1);
/* Signal the remote that we've consumed the data (if requested) */
- if (!GET_RX_CHANNEL_INFO(channel, fBLOCKREADINTR)) {
+ if (!GET_RX_CHANNEL_FLAG(channel, fBLOCKREADINTR)) {
/* Ensure ordering of channel info updates */
wmb();
@@ -667,7 +715,7 @@
*/
int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len)
{
- u32 hdr[5] = {len,};
+ __le32 hdr[5] = { cpu_to_le32(len), };
int tlen = sizeof(hdr) + len;
int ret;
@@ -685,7 +733,7 @@
goto out;
}
- SET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR, 0);
+ SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 0);
ret = wait_event_interruptible(channel->fblockread_event,
qcom_smd_get_tx_avail(channel) >= tlen ||
@@ -693,15 +741,15 @@
if (ret)
goto out;
- SET_TX_CHANNEL_INFO(channel, fBLOCKREADINTR, 1);
+ SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 1);
}
- SET_TX_CHANNEL_INFO(channel, fTAIL, 0);
+ SET_TX_CHANNEL_FLAG(channel, fTAIL, 0);
qcom_smd_write_fifo(channel, hdr, sizeof(hdr));
qcom_smd_write_fifo(channel, data, len);
- SET_TX_CHANNEL_INFO(channel, fHEAD, 1);
+ SET_TX_CHANNEL_FLAG(channel, fHEAD, 1);
/* Ensure ordering of channel info updates */
wmb();
@@ -1055,6 +1103,7 @@
unsigned info_id;
int tbl;
int i;
+ u32 eflags, cid;
for (tbl = 0; tbl < SMD_ALLOC_TBL_COUNT; tbl++) {
alloc_tbl = qcom_smem_get(edge->remote_pid,
@@ -1064,6 +1113,7 @@
for (i = 0; i < SMD_ALLOC_TBL_SIZE; i++) {
entry = &alloc_tbl[i];
+ eflags = le32_to_cpu(entry->flags);
if (test_bit(i, edge->allocated[tbl]))
continue;
@@ -1073,14 +1123,15 @@
if (!entry->name[0])
continue;
- if (!(entry->flags & SMD_CHANNEL_FLAGS_PACKET))
+ if (!(eflags & SMD_CHANNEL_FLAGS_PACKET))
continue;
- if ((entry->flags & SMD_CHANNEL_FLAGS_EDGE_MASK) != edge->edge_id)
+ if ((eflags & SMD_CHANNEL_FLAGS_EDGE_MASK) != edge->edge_id)
continue;
- info_id = smem_items[tbl].info_base_id + entry->cid;
- fifo_id = smem_items[tbl].fifo_base_id + entry->cid;
+ cid = le32_to_cpu(entry->cid);
+ info_id = smem_items[tbl].info_base_id + cid;
+ fifo_id = smem_items[tbl].fifo_base_id + cid;
channel = qcom_smd_create_channel(edge, info_id, fifo_id, entry->name);
if (IS_ERR(channel))