static int msm_smd_debug_mask;
+struct shared_info
+{
+ int ready;
+ unsigned state_apps;
+ unsigned state_modem;
+};
+
+static unsigned dummy_state_apps;
+static unsigned dummy_state_modem;
+
+static struct shared_info smd_info = {
+ .state_apps = (unsigned) &dummy_state_apps,
+ .state_modem = (unsigned) &dummy_state_modem,
+};
+
module_param_named(debug_mask, msm_smd_debug_mask,
int, S_IRUGO | S_IWUSR | S_IWGRP);
void *smem_find(unsigned id, unsigned size);
+static void *smem_item(unsigned id, unsigned *size);
static void smd_diag(void);
static unsigned last_heap_free = 0xffffffff;
writel(1, MSM_A2M_INT(5));
}
-static inline void notify_other_smd(void)
+static inline void notify_modem_smd(void)
{
writel(1, MSM_A2M_INT(0));
}
+static inline void notify_dsp_smd(void)
+{
+ writel(1, MSM_A2M_INT(8));
+}
+
static void smd_diag(void)
{
char *x;
static int check_for_modem_crash(void)
{
- struct smsm_shared *smsm;
-
- smsm = smem_find(ID_SHARED_STATE, 2 * sizeof(struct smsm_shared));
-
- /* if the modem's not ready yet, we have to hope for the best */
- if (!smsm)
- return 0;
-
- if (smsm[1].state & SMSM_RESET) {
+ if (readl(smd_info.state_modem) & SMSM_RESET) {
handle_modem_crash();
return -1;
- } else {
- return 0;
}
+ return 0;
}
-#define SMD_SS_CLOSED 0x00000000
-#define SMD_SS_OPENING 0x00000001
-#define SMD_SS_OPENED 0x00000002
-#define SMD_SS_FLUSHING 0x00000003
-#define SMD_SS_CLOSING 0x00000004
-#define SMD_SS_RESET 0x00000005
-#define SMD_SS_RESET_OPENING 0x00000006
+#define SMD_SS_CLOSED 0x00000000
+#define SMD_SS_OPENING 0x00000001
+#define SMD_SS_OPENED 0x00000002
+#define SMD_SS_FLUSHING 0x00000003
+#define SMD_SS_CLOSING 0x00000004
+#define SMD_SS_RESET 0x00000005
+#define SMD_SS_RESET_OPENING 0x00000006
-#define SMD_BUF_SIZE 8192
-#define SMD_CHANNELS 64
+#define SMD_BUF_SIZE 8192
+#define SMD_CHANNELS 64
-#define SMD_HEADER_SIZE 20
+#define SMD_HEADER_SIZE 20
/* the spinlock is used to synchronize between the
unsigned char fUNUSED;
unsigned tail;
unsigned head;
- unsigned char data[SMD_BUF_SIZE];
-};
+} __attribute__((packed));
-struct smd_shared {
+struct smd_shared_v1 {
struct smd_half_channel ch0;
+ unsigned char data0[SMD_BUF_SIZE];
struct smd_half_channel ch1;
+ unsigned char data1[SMD_BUF_SIZE];
};
+struct smd_shared_v2 {
+ struct smd_half_channel ch0;
+ struct smd_half_channel ch1;
+};
+
struct smd_channel {
volatile struct smd_half_channel *send;
volatile struct smd_half_channel *recv;
- struct list_head ch_list;
+ unsigned char *send_data;
+ unsigned char *recv_data;
+ unsigned fifo_mask;
+ unsigned fifo_size;
unsigned current_packet;
unsigned n;
+
+ struct list_head ch_list;
+
void *priv;
void (*notify)(void *priv, unsigned flags);
void (*update_state)(smd_channel_t *ch);
unsigned last_state;
+ void (*notify_other_cpu)(void);
+ unsigned type;
char name[32];
struct platform_device pdev;
};
static LIST_HEAD(smd_ch_closed_list);
-static LIST_HEAD(smd_ch_list);
+static LIST_HEAD(smd_ch_list); /* todo: per-target lists */
static unsigned char smd_ch_allocated[64];
static struct work_struct probe_work;
+#define SMD_TYPE_MASK 0x0FF
+#define SMD_TYPE_APPS_MODEM 0x000
+#define SMD_TYPE_APPS_DSP 0x001
+#define SMD_TYPE_MODEM_DSP 0x002
+
+#define SMD_KIND_MASK 0xF00
+#define SMD_KIND_UNKNOWN 0x000
+#define SMD_KIND_STREAM 0x100
+#define SMD_KIND_PACKET 0x200
+
static void smd_alloc_channel(const char *name, uint32_t cid, uint32_t type);
static void smd_channel_probe_worker(struct work_struct *work)
{
struct smd_alloc_elm *shared;
+ unsigned type;
unsigned n;
shared = smem_find(ID_CH_ALLOC_TBL, sizeof(*shared) * 64);
continue;
if (!shared[n].name[0])
continue;
- smd_alloc_channel(shared[n].name,
- shared[n].cid,
- shared[n].ctype);
+ type = shared[n].ctype & SMD_TYPE_MASK;
+ if ((type == SMD_TYPE_APPS_MODEM) ||
+ (type == SMD_TYPE_APPS_DSP))
+ smd_alloc_channel(shared[n].name,
+ shared[n].cid,
+ shared[n].ctype);
smd_ch_allocated[n] = 1;
}
}
/* how many bytes are available for reading */
static int smd_stream_read_avail(struct smd_channel *ch)
{
- return (ch->recv->head - ch->recv->tail) & (SMD_BUF_SIZE - 1);
+ return (ch->recv->head - ch->recv->tail) & ch->fifo_mask;
}
/* how many bytes we are free to write */
static int smd_stream_write_avail(struct smd_channel *ch)
{
- return (SMD_BUF_SIZE - 1) -
- ((ch->send->head - ch->send->tail) & (SMD_BUF_SIZE - 1));
+ return ch->fifo_mask -
+ ((ch->send->head - ch->send->tail) & ch->fifo_mask);
}
static int smd_packet_read_avail(struct smd_channel *ch)
{
unsigned head = ch->recv->head;
unsigned tail = ch->recv->tail;
- *ptr = (void *) (ch->recv->data + tail);
+ *ptr = (void *) (ch->recv_data + tail);
if (tail <= head)
return head - tail;
else
- return SMD_BUF_SIZE - tail;
+ return ch->fifo_size - tail;
}
/* advance the fifo read pointer after data from ch_read_buffer is consumed */
static void ch_read_done(struct smd_channel *ch, unsigned count)
{
BUG_ON(count > smd_stream_read_avail(ch));
- ch->recv->tail = (ch->recv->tail + count) & (SMD_BUF_SIZE - 1);
+ ch->recv->tail = (ch->recv->tail + count) & ch->fifo_mask;
ch->recv->fTAIL = 1;
}
{
unsigned head = ch->send->head;
unsigned tail = ch->send->tail;
- *ptr = (void *) (ch->send->data + head);
+ *ptr = (void *) (ch->send_data + head);
if (head < tail) {
return tail - head - 1;
} else {
if (tail == 0)
- return SMD_BUF_SIZE - head - 1;
+ return ch->fifo_size - head - 1;
else
- return SMD_BUF_SIZE - head;
+ return ch->fifo_size - head;
}
}
static void ch_write_done(struct smd_channel *ch, unsigned count)
{
BUG_ON(count > smd_stream_write_avail(ch));
- ch->send->head = (ch->send->head + count) & (SMD_BUF_SIZE - 1);
+ ch->send->head = (ch->send->head + count) & ch->fifo_mask;
ch->send->fHEAD = 1;
}
-static void hc_set_state(volatile struct smd_half_channel *hc, unsigned n)
+static void ch_set_state(struct smd_channel *ch, unsigned n)
{
if (n == SMD_SS_OPENED) {
- hc->fDSR = 1;
- hc->fCTS = 1;
- hc->fCD = 1;
+ ch->send->fDSR = 1;
+ ch->send->fCTS = 1;
+ ch->send->fCD = 1;
} else {
- hc->fDSR = 0;
- hc->fCTS = 0;
- hc->fCD = 0;
+ ch->send->fDSR = 0;
+ ch->send->fCTS = 0;
+ ch->send->fCD = 0;
}
- hc->state = n;
- hc->fSTATE = 1;
- notify_other_smd();
+ ch->send->state = n;
+ ch->send->fSTATE = 1;
+ ch->notify_other_cpu();
}
static void do_smd_probe(void)
ch->recv->tail = 0;
case SMD_SS_OPENED:
if (ch->send->state != SMD_SS_OPENED)
- hc_set_state(ch->send, SMD_SS_OPENED);
+ ch_set_state(ch, SMD_SS_OPENED);
ch->notify(ch->priv, SMD_EVENT_OPEN);
break;
case SMD_SS_FLUSHING:
}
}
-static irqreturn_t smd_irq_handler(int irq, void *data)
+static void handle_smd_irq(struct list_head *list, void (*notify)(void))
{
unsigned long flags;
struct smd_channel *ch;
unsigned tmp;
spin_lock_irqsave(&smd_lock, flags);
- list_for_each_entry(ch, &smd_ch_list, ch_list) {
+ list_for_each_entry(ch, list, ch_list) {
ch_flags = 0;
if (ch_is_open(ch)) {
if (ch->recv->fHEAD) {
}
}
if (do_notify)
- notify_other_smd();
+ notify();
spin_unlock_irqrestore(&smd_lock, flags);
do_smd_probe();
+}
+
+static irqreturn_t smd_irq_handler(int irq, void *data)
+{
+ handle_smd_irq(&smd_ch_list, notify_modem_smd);
return IRQ_HANDLED;
}
ch->notify(ch->priv, SMD_EVENT_CLOSE);
}
ch->notify(ch->priv, SMD_EVENT_DATA);
- notify_other_smd();
+ ch->notify_other_cpu();
spin_unlock_irqrestore(&smd_lock, flags);
}
-static int smd_is_packet(int chn)
+static int smd_is_packet(int chn, unsigned type)
{
+ type &= SMD_KIND_MASK;
+ if (type == SMD_KIND_PACKET)
+ return 1;
+ if (type == SMD_KIND_STREAM)
+ return 0;
+
+ /* older AMSS reports SMD_KIND_UNKNOWN always */
if ((chn > 4) || (chn == 1))
return 1;
else
break;
}
- notify_other_smd();
+ ch->notify_other_cpu();
return orig_len - len;
}
r = ch_read(ch, data, len);
if (r > 0)
- notify_other_smd();
+ ch->notify_other_cpu();
return r;
}
r = ch_read(ch, data, len);
if (r > 0)
- notify_other_smd();
+ ch->notify_other_cpu();
spin_lock_irqsave(&smd_lock, flags);
ch->current_packet -= r;
return r;
}
-static void smd_alloc_channel(const char *name, uint32_t cid, uint32_t type)
+static int smd_alloc_v2(struct smd_channel *ch)
{
- struct smd_channel *ch;
- struct smd_shared *shared;
+ struct smd_shared_v2 *shared2;
+ void *buffer;
+ unsigned buffer_sz;
- shared = smem_alloc(ID_SMD_CHANNELS + cid, sizeof(*shared));
- if (!shared) {
- pr_err("smd_alloc_channel() cid %d does not exist\n", cid);
- return;
+ shared2 = smem_alloc(SMEM_SMD_BASE_ID + ch->n, sizeof(*shared2));
+ buffer = smem_item(SMEM_SMD_FIFO_BASE_ID + ch->n, &buffer_sz);
+
+ if (!buffer)
+ return -1;
+
+ /* buffer must be a power-of-two size */
+ if (buffer_sz & (buffer_sz - 1))
+ return -1;
+
+ buffer_sz /= 2;
+ ch->send = &shared2->ch0;
+ ch->recv = &shared2->ch1;
+ ch->send_data = buffer;
+ ch->recv_data = buffer + buffer_sz;
+ ch->fifo_size = buffer_sz;
+ return 0;
+}
+
+static int smd_alloc_v1(struct smd_channel *ch)
+{
+ struct smd_shared_v1 *shared1;
+ shared1 = smem_alloc(ID_SMD_CHANNELS + ch->n, sizeof(*shared1));
+ if (!shared1) {
+ pr_err("smd_alloc_channel() cid %d does not exist\n", ch->n);
+ return -1;
}
+ ch->send = &shared1->ch0;
+ ch->recv = &shared1->ch1;
+ ch->send_data = shared1->data0;
+ ch->recv_data = shared1->data1;
+ ch->fifo_size = SMD_BUF_SIZE;
+ return 0;
+}
+
+
+static void smd_alloc_channel(const char *name, uint32_t cid, uint32_t type)
+{
+ struct smd_channel *ch;
ch = kzalloc(sizeof(struct smd_channel), GFP_KERNEL);
if (ch == 0) {
pr_err("smd_alloc_channel() out of memory\n");
return;
}
-
- ch->send = &shared->ch0;
- ch->recv = &shared->ch1;
ch->n = cid;
- if (smd_is_packet(cid)) {
+ if (smd_alloc_v2(ch) && smd_alloc_v1(ch)) {
+ kfree(ch);
+ return;
+ }
+
+ ch->fifo_mask = ch->fifo_size - 1;
+ ch->type = type;
+
+ if ((type & SMD_TYPE_MASK) == SMD_TYPE_APPS_MODEM)
+ ch->notify_other_cpu = notify_modem_smd;
+ else
+ ch->notify_other_cpu = notify_dsp_smd;
+
+ if (smd_is_packet(cid, type)) {
ch->read = smd_packet_read;
ch->write = smd_packet_write;
ch->read_avail = smd_packet_read_avail;
ch->update_state = update_stream_state;
}
- memcpy(ch->name, "SMD_", 4);
+ if ((type & 0xff) == 0)
+ memcpy(ch->name, "SMD_", 4);
+ else
+ memcpy(ch->name, "DSP_", 4);
memcpy(ch->name + 4, name, 20);
ch->name[23] = 0;
ch->pdev.name = ch->name;
ch->pdev.id = -1;
- pr_info("smd_alloc_channel() '%s' cid=%d, shared=%p\n",
- ch->name, ch->n, shared);
+ pr_info("smd_alloc_channel() cid=%02d size=%05d '%s'\n",
+ ch->n, ch->fifo_size, ch->name);
mutex_lock(&smd_creation_mutex);
list_add(&ch->ch_list, &smd_ch_closed_list);
*/
if (ch->recv->state == SMD_SS_CLOSING) {
ch->send->head = 0;
- hc_set_state(ch->send, SMD_SS_OPENING);
+ ch_set_state(ch, SMD_SS_OPENING);
} else {
- hc_set_state(ch->send, SMD_SS_OPENED);
+ ch_set_state(ch, SMD_SS_OPENED);
}
spin_unlock_irqrestore(&smd_lock, flags);
smd_kick(ch);
spin_lock_irqsave(&smd_lock, flags);
ch->notify = do_nothing_notify;
list_del(&ch->ch_list);
- hc_set_state(ch->send, SMD_SS_CLOSED);
+ ch_set_state(ch, SMD_SS_CLOSED);
spin_unlock_irqrestore(&smd_lock, flags);
mutex_lock(&smd_creation_mutex);
return smem_find(id, size);
}
-static void *_smem_find(unsigned id, unsigned *size)
+static void *smem_item(unsigned id, unsigned *size)
{
struct smem_shared *shared = (void *) MSM_SHARED_RAM_BASE;
struct smem_heap_entry *toc = shared->heap_toc;
if (toc[id].allocated) {
*size = toc[id].size;
return (void *) (MSM_SHARED_RAM_BASE + toc[id].offset);
+ } else {
+ *size = 0;
}
return 0;
unsigned size;
void *ptr;
- ptr = _smem_find(id, &size);
+ ptr = smem_item(id, &size);
if (!ptr)
return 0;
static irqreturn_t smsm_irq_handler(int irq, void *data)
{
unsigned long flags;
- struct smsm_shared *smsm;
+ unsigned apps, modm;
spin_lock_irqsave(&smem_lock, flags);
- smsm = smem_alloc(ID_SHARED_STATE,
- 2 * sizeof(struct smsm_shared));
- if (smsm == 0) {
- pr_info("<SM NO STATE>\n");
- } else {
- unsigned apps = smsm[0].state;
- unsigned modm = smsm[1].state;
-
- if (msm_smd_debug_mask & MSM_SMSM_DEBUG)
- pr_info("<SM %08x %08x>\n", apps, modm);
- if (modm & SMSM_RESET) {
- handle_modem_crash();
- } else {
- apps |= SMSM_INIT;
- if (modm & SMSM_SMDINIT)
- apps |= SMSM_SMDINIT;
- if (modm & SMSM_RPCINIT)
- apps |= SMSM_RPCINIT;
- }
+ apps = readl(smd_info.state_apps);
+ modm = readl(smd_info.state_modem);
- if (smsm[0].state != apps) {
- if (msm_smd_debug_mask & MSM_SMSM_DEBUG)
- pr_info("<SM %08x NOTIFY>\n", apps);
- smsm[0].state = apps;
- do_smd_probe();
- notify_other_smsm();
- }
+ if (msm_smd_debug_mask & MSM_SMSM_DEBUG)
+ pr_info("<SM %08x %08x>\n", apps, modm);
+ if (modm & SMSM_RESET) {
+ handle_modem_crash();
}
+ do_smd_probe();
+
spin_unlock_irqrestore(&smem_lock, flags);
return IRQ_HANDLED;
}
int smsm_change_state(uint32_t clear_mask, uint32_t set_mask)
{
unsigned long flags;
- struct smsm_shared *smsm;
+ unsigned state;
+
+ if (!smd_info.ready)
+ return -EIO;
spin_lock_irqsave(&smem_lock, flags);
- smsm = smem_alloc(ID_SHARED_STATE,
- 2 * sizeof(struct smsm_shared));
-
- if (smsm) {
- if (smsm[1].state & SMSM_RESET)
- handle_modem_crash();
- smsm[0].state = (smsm[0].state & ~clear_mask) | set_mask;
- if (msm_smd_debug_mask & MSM_SMSM_DEBUG)
- pr_info("smsm_change_state %x\n",
- smsm[0].state);
- notify_other_smsm();
- }
+ if (readl(smd_info.state_modem) & SMSM_RESET)
+ handle_modem_crash();
+
+ state = (readl(smd_info.state_apps) & ~clear_mask) | set_mask;
+ writel(state, smd_info.state_apps);
+
+ if (msm_smd_debug_mask & MSM_SMSM_DEBUG)
+ pr_info("smsm_change_state %x\n", state);
+ notify_other_smsm();
spin_unlock_irqrestore(&smem_lock, flags);
- if (smsm == NULL) {
- pr_err("smsm_change_state <SM NO STATE>\n");
- return -EIO;
- }
return 0;
}
uint32_t smsm_get_state(void)
{
unsigned long flags;
- struct smsm_shared *smsm;
uint32_t rv;
spin_lock_irqsave(&smem_lock, flags);
- smsm = smem_alloc(ID_SHARED_STATE,
- 2 * sizeof(struct smsm_shared));
-
- if (smsm)
- rv = smsm[1].state;
- else
- rv = 0;
+ rv = readl(smd_info.state_modem);
if (rv & SMSM_RESET)
handle_modem_crash();
spin_unlock_irqrestore(&smem_lock, flags);
- if (smsm == NULL)
- pr_err("smsm_get_state <SM NO STATE>\n");
return rv;
}
int r;
pr_info("smd_core_init()\n");
+ /* wait for essential items to be initialized */
+ for (;;) {
+ unsigned size;
+ void *state;
+ state = smem_item(SMEM_SMSM_SHARED_STATE, &size);
+ if (size == SMSM_V1_SIZE) {
+ smd_info.state_apps = state + SMSM_V1_STATE_APPS;
+ smd_info.state_modem = state + SMSM_V1_STATE_MODEM;
+ break;
+ }
+ if (size == SMSM_V2_SIZE) {
+ smd_info.state_apps = state + SMSM_V2_STATE_APPS;
+ smd_info.state_modem = state + SMSM_V2_STATE_MODEM;
+ break;
+ }
+ }
+
+ smd_info.ready = 1;
+
r = request_irq(INT_A9_M2A_0, smd_irq_handler,
IRQF_TRIGGER_RISING, "smd_dev", 0);
if (r < 0)
if (r < 0)
pr_err("smd_core_init: enable_irq_wake failed for A9_M2A_5\n");
- /* we may have missed a signal while booting -- fake
- * an interrupt to make sure we process any existing
- * state
- */
- smsm_irq_handler(0, 0);
+ /* check for any SMD channels that may already exist */
+ do_smd_probe();
+
+ /* indicate that we're up and running */
+ writel(SMSM_INIT | SMSM_SMDINIT | SMSM_RPCINIT, smd_info.state_apps);
+ notify_other_smsm();
pr_info("smd_core_init() done\n");
#if defined(CONFIG_DEBUG_FS)
-static int dump_ch(char *buf, int max, int n,
- struct smd_half_channel *s,
- struct smd_half_channel *r)
+static int dump_ch(char *buf, int max, struct smd_channel *ch)
{
+ volatile struct smd_half_channel *s = ch->send;
+ volatile struct smd_half_channel *r = ch->recv;
+
return scnprintf(
buf, max,
"ch%02d:"
- " %8s(%04d/%04d) %c%c%c%c%c%c%c <->"
- " %8s(%04d/%04d) %c%c%c%c%c%c%c\n", n,
+ " %8s(%05d/%05d) %c%c%c%c%c%c%c <->"
+ " %8s(%05d/%05d) %c%c%c%c%c%c%c\n", ch->n,
chstate(s->state), s->tail, s->head,
s->fDSR ? 'D' : 'd',
s->fCTS ? 'C' : 'c',
static int debug_read_stat(char *buf, int max)
{
- struct smsm_shared *smsm;
char *msg;
int i = 0;
- smsm = smem_find(ID_SHARED_STATE,
- 2 * sizeof(struct smsm_shared));
-
msg = smem_find(ID_DIAG_ERR_MSG, SZ_DIAG_ERR_MSG);
- if (smsm) {
- if (smsm[1].state & SMSM_RESET)
- i += scnprintf(buf + i, max - i,
- "smsm: ARM9 HAS CRASHED\n");
- i += scnprintf(buf + i, max - i, "smsm: a9: %08x a11: %08x\n",
- smsm[0].state, smsm[1].state);
- } else {
- i += scnprintf(buf + i, max - i, "smsm: cannot find\n");
- }
+ if (readl(smd_info.state_modem) & SMSM_RESET)
+ i += scnprintf(buf + i, max - i,
+ "smsm: ARM9 HAS CRASHED\n");
+
+ i += scnprintf(buf + i, max - i, "smsm: a9: %08x a11: %08x\n",
+ readl(smd_info.state_modem),
+ readl(smd_info.state_apps));
+
if (msg) {
msg[SZ_DIAG_ERR_MSG - 1] = 0;
i += scnprintf(buf + i, max - i, "diag: '%s'\n", msg);
if (toc[n].allocated == 0)
continue;
i += scnprintf(buf + i, max - i,
- "%04d: offsed %08x size %08x\n",
+ "%04d: offset %08x size %08x\n",
n, toc[n].offset, toc[n].size);
}
return i;
static int debug_read_ch(char *buf, int max)
{
- struct smd_shared *shared;
- int n, i = 0;
+ struct smd_channel *ch;
+ unsigned long flags;
+ int i = 0;
- for (n = 0; n < SMD_CHANNELS; n++) {
- shared = smem_find(ID_SMD_CHANNELS + n,
- sizeof(struct smd_shared));
- if (shared == 0)
- continue;
- i += dump_ch(buf + i, max - i, n, &shared->ch0, &shared->ch1);
- }
+ spin_lock_irqsave(&smd_lock, flags);
+ list_for_each_entry(ch, &smd_ch_list, ch_list)
+ i += dump_ch(buf + i, max - i, ch);
+ list_for_each_entry(ch, &smd_ch_closed_list, ch_list)
+ i += dump_ch(buf + i, max - i, ch);
+ spin_unlock_irqrestore(&smd_lock, flags);
return i;
}
unsigned size;
void *data;
- data = _smem_find(SMEM_HW_SW_BUILD_ID, &size);
+ data = smem_item(SMEM_HW_SW_BUILD_ID, &size);
if (!data)
return 0;
if (shared[n].ref_count == 0)
continue;
i += scnprintf(buf + i, max - i,
- "%03d: %20s cid=%02d ctype=%d ref_count=%d\n",
+ "%03d: %-20s cid=%02d type=%03d "
+ "kind=%02d ref_count=%d\n",
n, shared[n].name, shared[n].cid,
- shared[n].ctype, shared[n].ref_count);
+ shared[n].ctype & 0xff,
+ (shared[n].ctype >> 8) & 0xf,
+ shared[n].ref_count);
}
return i;
git://bbs.cooldavid.org / net-next-2.6.git / commitdiff