diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/cx18/cx18-driver.h | 7 | ||||
| -rw-r--r-- | drivers/media/video/cx18/cx18-mailbox.c | 34 |
2 files changed, 27 insertions, 14 deletions
diff --git a/drivers/media/video/cx18/cx18-driver.h b/drivers/media/video/cx18/cx18-driver.h index 041fa660a7c..749bbb60a29 100644 --- a/drivers/media/video/cx18/cx18-driver.h +++ b/drivers/media/video/cx18/cx18-driver.h @@ -245,13 +245,20 @@ struct cx18_dvb { struct cx18; /* forward reference */ struct cx18_scb; /* forward reference */ + #define CX18_MAX_MDL_ACKS 2 #define CX18_MAX_EPU_WORK_ORDERS 70 /* CPU_DE_RELEASE_MDL bursts 63 commands */ +#define CX18_F_EWO_MB_STALE_UPON_RECEIPT 0x1 +#define CX18_F_EWO_MB_STALE_WHILE_PROC 0x2 +#define CX18_F_EWO_MB_STALE \ + (CX18_F_EWO_MB_STALE_UPON_RECEIPT | CX18_F_EWO_MB_STALE_WHILE_PROC) + struct cx18_epu_work_order { struct work_struct work; atomic_t pending; struct cx18 *cx; + unsigned long flags; int rpu; struct cx18_mailbox mb; struct cx18_mdl_ack mdl_ack[CX18_MAX_MDL_ACKS]; diff --git a/drivers/media/video/cx18/cx18-mailbox.c b/drivers/media/video/cx18/cx18-mailbox.c index d49c7c27c18..844a62de653 100644 --- a/drivers/media/video/cx18/cx18-mailbox.c +++ b/drivers/media/video/cx18/cx18-mailbox.c @@ -233,7 +233,7 @@ void cx18_epu_work_handler(struct work_struct *work) * Functions that run in an interrupt handling context */ -static void mb_ack_irq(struct cx18 *cx, const struct cx18_epu_work_order *order) +static void mb_ack_irq(struct cx18 *cx, struct cx18_epu_work_order *order) { struct cx18_mailbox __iomem *ack_mb; u32 ack_irq, req; @@ -256,15 +256,20 @@ static void mb_ack_irq(struct cx18 *cx, const struct cx18_epu_work_order *order) req = order->mb.request; /* Don't ack if the RPU has gotten impatient and timed us out */ if (req != cx18_readl(cx, &ack_mb->request) || - req == cx18_readl(cx, &ack_mb->ack)) + req == cx18_readl(cx, &ack_mb->ack)) { + CX18_WARN("Possibly falling behind: %s self-ack'ed our incoming" + " %s to EPU mailbox (sequence no. %u) while " + "processing\n", + rpu_str[order->rpu], rpu_str[order->rpu], req); + order->flags |= CX18_F_EWO_MB_STALE_WHILE_PROC; return; + } cx18_writel(cx, req, &ack_mb->ack); cx18_write_reg_expect(cx, ack_irq, SW2_INT_SET, ack_irq, ack_irq); return; } -static int epu_dma_done_irq(struct cx18 *cx, struct cx18_epu_work_order *order, - int stale) +static int epu_dma_done_irq(struct cx18 *cx, struct cx18_epu_work_order *order) { u32 handle, mdl_ack_offset, mdl_ack_count; struct cx18_mailbox *mb; @@ -276,20 +281,21 @@ static int epu_dma_done_irq(struct cx18 *cx, struct cx18_epu_work_order *order, if (handle == CX18_INVALID_TASK_HANDLE || mdl_ack_count == 0 || mdl_ack_count > CX18_MAX_MDL_ACKS) { - if (!stale) + if ((order->flags & CX18_F_EWO_MB_STALE) == 0) mb_ack_irq(cx, order); return -1; } cx18_memcpy_fromio(cx, order->mdl_ack, cx->enc_mem + mdl_ack_offset, sizeof(struct cx18_mdl_ack) * mdl_ack_count); - if (!stale) + + if ((order->flags & CX18_F_EWO_MB_STALE) == 0) mb_ack_irq(cx, order); return 1; } static -int epu_debug_irq(struct cx18 *cx, struct cx18_epu_work_order *order, int stale) +int epu_debug_irq(struct cx18 *cx, struct cx18_epu_work_order *order) { u32 str_offset; char *str = order->str; @@ -303,14 +309,14 @@ int epu_debug_irq(struct cx18 *cx, struct cx18_epu_work_order *order, int stale) cx18_setup_page(cx, SCB_OFFSET); } - if (!stale) + if ((order->flags & CX18_F_EWO_MB_STALE) == 0) mb_ack_irq(cx, order); return str_offset ? 1 : 0; } static inline -int epu_cmd_irq(struct cx18 *cx, struct cx18_epu_work_order *order, int stale) +int epu_cmd_irq(struct cx18 *cx, struct cx18_epu_work_order *order) { int ret = -1; @@ -319,10 +325,10 @@ int epu_cmd_irq(struct cx18 *cx, struct cx18_epu_work_order *order, int stale) { switch (order->mb.cmd) { case CX18_EPU_DMA_DONE: - ret = epu_dma_done_irq(cx, order, stale); + ret = epu_dma_done_irq(cx, order); break; case CX18_EPU_DEBUG: - ret = epu_debug_irq(cx, order, stale); + ret = epu_debug_irq(cx, order); break; default: CX18_WARN("Unknown CPU to EPU mailbox command %#0x\n", @@ -370,7 +376,6 @@ void cx18_api_epu_cmd_irq(struct cx18 *cx, int rpu) struct cx18_mailbox __iomem *mb; struct cx18_mailbox *order_mb; struct cx18_epu_work_order *order; - int stale = 0; int submit; switch (rpu) { @@ -391,6 +396,7 @@ void cx18_api_epu_cmd_irq(struct cx18 *cx, int rpu) return; } + order->flags = 0; order->rpu = rpu; order_mb = &order->mb; cx18_memcpy_fromio(cx, order_mb, mb, sizeof(struct cx18_mailbox)); @@ -400,14 +406,14 @@ void cx18_api_epu_cmd_irq(struct cx18 *cx, int rpu) " %s to EPU mailbox (sequence no. %u)\n", rpu_str[rpu], rpu_str[rpu], order_mb->request); dump_mb(cx, order_mb, "incoming"); - stale = 1; + order->flags = CX18_F_EWO_MB_STALE_UPON_RECEIPT; } /* * Individual EPU command processing is responsible for ack-ing * a non-stale mailbox as soon as possible */ - submit = epu_cmd_irq(cx, order, stale); + submit = epu_cmd_irq(cx, order); if (submit > 0) { queue_work(cx18_work_queue, &order->work); } |