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Diffstat (limited to 'drivers/soc/qcom/smd.c')
-rw-r--r--drivers/soc/qcom/smd.c296
1 files changed, 180 insertions, 116 deletions
diff --git a/drivers/soc/qcom/smd.c b/drivers/soc/qcom/smd.c
index a6155c917d52..86b598cff91a 100644
--- a/drivers/soc/qcom/smd.c
+++ b/drivers/soc/qcom/smd.c
@@ -65,7 +65,9 @@
*/
struct smd_channel_info;
+struct smd_channel_info_pair;
struct smd_channel_info_word;
+struct smd_channel_info_word_pair;
#define SMD_ALLOC_TBL_COUNT 2
#define SMD_ALLOC_TBL_SIZE 64
@@ -85,8 +87,8 @@ static const struct {
.fifo_base_id = 338
},
{
- .alloc_tbl_id = 14,
- .info_base_id = 266,
+ .alloc_tbl_id = 266,
+ .info_base_id = 138,
.fifo_base_id = 202,
},
};
@@ -151,10 +153,8 @@ enum smd_channel_state {
* @name: name of the channel
* @state: local state of the channel
* @remote_state: remote state of the channel
- * @tx_info: byte aligned outgoing channel info
- * @rx_info: byte aligned incoming channel info
- * @tx_info_word: word aligned outgoing channel info
- * @rx_info_word: word aligned incoming channel info
+ * @info: byte aligned outgoing/incoming channel info
+ * @info_word: word aligned outgoing/incoming channel info
* @tx_lock: lock to make writes to the channel mutually exclusive
* @fblockread_event: wakeup event tied to tx fBLOCKREADINTR
* @tx_fifo: pointer to the outgoing ring buffer
@@ -175,11 +175,8 @@ struct qcom_smd_channel {
enum smd_channel_state state;
enum smd_channel_state remote_state;
- struct smd_channel_info *tx_info;
- struct smd_channel_info *rx_info;
-
- struct smd_channel_info_word *tx_info_word;
- struct smd_channel_info_word *rx_info_word;
+ struct smd_channel_info_pair *info;
+ struct smd_channel_info_word_pair *info_word;
struct mutex tx_lock;
wait_queue_head_t fblockread_event;
@@ -215,7 +212,7 @@ struct qcom_smd {
* 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;
@@ -224,46 +221,104 @@ struct smd_channel_info {
u8 fTAIL;
u8 fSTATE;
u8 fBLOCKREADINTR;
- u32 tail;
- u32 head;
+ __le32 tail;
+ __le32 head;
+};
+
+struct smd_channel_info_pair {
+ struct smd_channel_info tx;
+ struct smd_channel_info rx;
};
/*
* 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;
};
-#define GET_RX_CHANNEL_INFO(channel, param) \
- (channel->rx_info_word ? \
- channel->rx_info_word->param : \
- channel->rx_info->param)
-
-#define SET_RX_CHANNEL_INFO(channel, param, value) \
- (channel->rx_info_word ? \
- (channel->rx_info_word->param = value) : \
- (channel->rx_info->param = value))
-
-#define GET_TX_CHANNEL_INFO(channel, param) \
- (channel->tx_info_word ? \
- channel->tx_info_word->param : \
- channel->tx_info->param)
+struct smd_channel_info_word_pair {
+ struct smd_channel_info_word tx;
+ struct smd_channel_info_word rx;
+};
-#define SET_TX_CHANNEL_INFO(channel, param, value) \
- (channel->tx_info_word ? \
- (channel->tx_info_word->param = value) : \
- (channel->tx_info->param = value))
+#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 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 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_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
@@ -274,9 +329,9 @@ struct smd_channel_info_word {
*/
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
@@ -305,14 +360,14 @@ static void qcom_smd_signal_channel(struct qcom_smd_channel *channel)
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);
@@ -350,12 +405,12 @@ static void qcom_smd_channel_set_state(struct qcom_smd_channel *channel,
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);
@@ -364,20 +419,15 @@ static void qcom_smd_channel_set_state(struct qcom_smd_channel *channel,
/*
* Copy count bytes of data using 32bit accesses, if that's required.
*/
-static void smd_copy_to_fifo(void __iomem *_dst,
- const void *_src,
+static void smd_copy_to_fifo(void __iomem *dst,
+ const void *src,
size_t count,
bool word_aligned)
{
- u32 *dst = (u32 *)_dst;
- u32 *src = (u32 *)_src;
-
if (word_aligned) {
- count /= sizeof(u32);
- while (count--)
- writel_relaxed(*src++, dst++);
+ __iowrite32_copy(dst, src, count / sizeof(u32));
} else {
- memcpy_toio(_dst, _src, count);
+ memcpy_toio(dst, src, count);
}
}
@@ -395,7 +445,7 @@ static void smd_copy_from_fifo(void *_dst,
if (word_aligned) {
count /= sizeof(u32);
while (count--)
- *dst++ = readl_relaxed(src++);
+ *dst++ = __raw_readl(src++);
} else {
memcpy_fromio(_dst, _src, count);
}
@@ -412,7 +462,7 @@ static size_t qcom_smd_channel_peek(struct qcom_smd_channel *channel,
unsigned tail;
size_t len;
- word_aligned = channel->rx_info_word != NULL;
+ word_aligned = channel->info_word;
tail = GET_RX_CHANNEL_INFO(channel, tail);
len = min_t(size_t, count, channel->fifo_size - tail);
@@ -491,7 +541,7 @@ static bool qcom_smd_channel_intr(struct qcom_smd_channel *channel)
{
bool need_state_scan = false;
int remote_state;
- u32 pktlen;
+ __le32 pktlen;
int avail;
int ret;
@@ -502,10 +552,10 @@ static bool qcom_smd_channel_intr(struct qcom_smd_channel *channel)
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 */
@@ -513,7 +563,7 @@ static bool qcom_smd_channel_intr(struct qcom_smd_channel *channel)
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 (;;) {
@@ -522,7 +572,7 @@ static bool qcom_smd_channel_intr(struct qcom_smd_channel *channel)
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)
@@ -533,10 +583,10 @@ static bool qcom_smd_channel_intr(struct qcom_smd_channel *channel)
}
/* 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();
@@ -627,7 +677,7 @@ static int qcom_smd_write_fifo(struct qcom_smd_channel *channel,
unsigned head;
size_t len;
- word_aligned = channel->tx_info_word != NULL;
+ word_aligned = channel->info_word;
head = GET_TX_CHANNEL_INFO(channel, head);
len = min_t(size_t, count, channel->fifo_size - head);
@@ -665,12 +715,16 @@ static int qcom_smd_write_fifo(struct qcom_smd_channel *channel,
*/
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;
/* Word aligned channels only accept word size aligned data */
- if (channel->rx_info_word != NULL && len % 4)
+ if (channel->info_word && len % 4)
+ return -EINVAL;
+
+ /* Reject packets that are too big */
+ if (tlen >= channel->fifo_size)
return -EINVAL;
ret = mutex_lock_interruptible(&channel->tx_lock);
@@ -683,7 +737,7 @@ int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len)
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 ||
@@ -691,15 +745,15 @@ int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len)
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();
@@ -727,6 +781,19 @@ static struct qcom_smd_driver *to_smd_driver(struct device *dev)
static int qcom_smd_dev_match(struct device *dev, struct device_driver *drv)
{
+ struct qcom_smd_device *qsdev = to_smd_device(dev);
+ struct qcom_smd_driver *qsdrv = container_of(drv, struct qcom_smd_driver, driver);
+ const struct qcom_smd_id *match = qsdrv->smd_match_table;
+ const char *name = qsdev->channel->name;
+
+ if (match) {
+ while (match->name[0]) {
+ if (!strcmp(match->name, name))
+ return 1;
+ match++;
+ }
+ }
+
return of_driver_match_device(dev, drv);
}
@@ -854,10 +921,8 @@ static struct device_node *qcom_smd_match_channel(struct device_node *edge_node,
for_each_available_child_of_node(edge_node, child) {
key = "qcom,smd-channels";
ret = of_property_read_string(child, key, &name);
- if (ret) {
- of_node_put(child);
+ if (ret)
continue;
- }
if (strcmp(name, channel) == 0)
return child;
@@ -880,19 +945,17 @@ static int qcom_smd_create_device(struct qcom_smd_channel *channel)
if (channel->qsdev)
return -EEXIST;
- node = qcom_smd_match_channel(edge->of_node, channel->name);
- if (!node) {
- dev_dbg(smd->dev, "no match for '%s'\n", channel->name);
- return -ENXIO;
- }
-
dev_dbg(smd->dev, "registering '%s'\n", channel->name);
qsdev = kzalloc(sizeof(*qsdev), GFP_KERNEL);
if (!qsdev)
return -ENOMEM;
- dev_set_name(&qsdev->dev, "%s.%s", edge->of_node->name, node->name);
+ node = qcom_smd_match_channel(edge->of_node, channel->name);
+ dev_set_name(&qsdev->dev, "%s.%s",
+ edge->of_node->name,
+ node ? node->name : channel->name);
+
qsdev->dev.parent = smd->dev;
qsdev->dev.bus = &qcom_smd_bus;
qsdev->dev.release = qcom_smd_release_device;
@@ -978,21 +1041,20 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed
spin_lock_init(&channel->recv_lock);
init_waitqueue_head(&channel->fblockread_event);
- ret = qcom_smem_get(edge->remote_pid, smem_info_item, (void **)&info,
- &info_size);
- if (ret)
+ info = qcom_smem_get(edge->remote_pid, smem_info_item, &info_size);
+ if (IS_ERR(info)) {
+ ret = PTR_ERR(info);
goto free_name_and_channel;
+ }
/*
* Use the size of the item to figure out which channel info struct to
* use.
*/
if (info_size == 2 * sizeof(struct smd_channel_info_word)) {
- channel->tx_info_word = info;
- channel->rx_info_word = info + sizeof(struct smd_channel_info_word);
+ channel->info_word = info;
} else if (info_size == 2 * sizeof(struct smd_channel_info)) {
- channel->tx_info = info;
- channel->rx_info = info + sizeof(struct smd_channel_info);
+ channel->info = info;
} else {
dev_err(smd->dev,
"channel info of size %zu not supported\n", info_size);
@@ -1000,10 +1062,11 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed
goto free_name_and_channel;
}
- ret = qcom_smem_get(edge->remote_pid, smem_fifo_item, &fifo_base,
- &fifo_size);
- if (ret)
+ fifo_base = qcom_smem_get(edge->remote_pid, smem_fifo_item, &fifo_size);
+ if (IS_ERR(fifo_base)) {
+ ret = PTR_ERR(fifo_base);
goto free_name_and_channel;
+ }
/* The channel consist of a rx and tx fifo of equal size */
fifo_size /= 2;
@@ -1040,20 +1103,19 @@ static void qcom_discover_channels(struct qcom_smd_edge *edge)
unsigned long flags;
unsigned fifo_id;
unsigned info_id;
- int ret;
int tbl;
int i;
+ u32 eflags, cid;
for (tbl = 0; tbl < SMD_ALLOC_TBL_COUNT; tbl++) {
- ret = qcom_smem_get(edge->remote_pid,
- smem_items[tbl].alloc_tbl_id,
- (void **)&alloc_tbl,
- NULL);
- if (ret < 0)
+ alloc_tbl = qcom_smem_get(edge->remote_pid,
+ smem_items[tbl].alloc_tbl_id, NULL);
+ if (IS_ERR(alloc_tbl))
continue;
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;
@@ -1063,14 +1125,15 @@ static void qcom_discover_channels(struct qcom_smd_edge *edge)
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))
@@ -1227,11 +1290,12 @@ static int qcom_smd_probe(struct platform_device *pdev)
int num_edges;
int ret;
int i = 0;
+ void *p;
/* Wait for smem */
- ret = qcom_smem_get(QCOM_SMEM_HOST_ANY, smem_items[0].alloc_tbl_id, NULL, NULL);
- if (ret == -EPROBE_DEFER)
- return ret;
+ p = qcom_smem_get(QCOM_SMEM_HOST_ANY, smem_items[0].alloc_tbl_id, NULL);
+ if (PTR_ERR(p) == -EPROBE_DEFER)
+ return PTR_ERR(p);
num_edges = of_get_available_child_count(pdev->dev.of_node);
array_size = sizeof(*smd) + num_edges * sizeof(struct qcom_smd_edge);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 04:17:58 +0000