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S3 ViRGE: Make IRQs happen in main thread

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FIFO is also no longer immediately woken up upon writes
This commit is contained in:
Cacodemon345
2025-03-03 22:03:52 +06:00
parent 88d9bf68e8
commit fae26729f1
1 changed files with 51 additions and 6 deletions
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57
src/video/vid_s3_virge.c
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@@ -338,6 +338,7 @@ typedef struct virge_t {
event_t * fifo_not_full_event;
atomic_int virge_busy;
atomic_uint virge_irq_req;
uint8_t subsys_stat;
uint8_t subsys_cntl;
@@ -373,6 +374,9 @@ typedef struct virge_t {
uint32_t dma_mmio_addr;
uint32_t dma_data_type;
pc_timer_t wake_timer;
pc_timer_t irq_timer;
int pci;
int is_agp;
} virge_t;
@@ -383,6 +387,28 @@ wake_fifo_thread(virge_t *virge) {
thread_set_event(virge->wake_fifo_thread);
}
void
s3_virge_wake_fifo_timer(void* priv)
{
virge_t *virge = (virge_t *) priv;
thread_set_event(virge->wake_fifo_thread); /*Wake up FIFO thread if moving from idle*/
}
void
s3_virge_wake_fifo_thread(virge_t *virge)
{
if (!timer_is_enabled(&virge->wake_timer)) {
/*Don't wake FIFO thread immediately - if we do that it will probably
process one word and go back to sleep, requiring it to be woken on
almost every write. Instead, wait a short while so that the CPU
emulation writes more data so we have more batched-up work.*/
timer_on_auto(&virge->wake_timer, 100.0);
}
if (!timer_is_enabled(&virge->irq_timer))
timer_on_auto(&virge->irq_timer, 100.0);
}
static virge_t *reset_state = NULL;
static video_timings_t timing_diamond_stealth3d_2000_pci = { .type = VIDEO_PCI, .write_b = 2, .write_w = 2, .write_l = 3, .read_b = 28, .read_w = 28, .read_l = 45 };
@@ -471,6 +497,19 @@ s3_virge_update_irqs(virge_t *virge)
pci_clear_irq(virge->pci_slot, PCI_INTA, &virge->irq_state);
}
void
s3_virge_update_irq_timer(void* priv)
{
virge_t *virge = (virge_t *) priv;
if (virge->virge_irq_req) {
virge->virge_irq_req--;
s3_virge_update_irqs(virge);
}
timer_on_auto(&virge->irq_timer, 100.);
}
static void
s3_virge_out(uint16_t addr, uint8_t val, void *priv)
{
@@ -1101,6 +1140,9 @@ static void
s3_virge_vblank_start(svga_t *svga) {
virge_t *virge = (virge_t *) svga->priv;
if (virge->virge_irq_req)
virge->virge_irq_req--;
virge->subsys_stat |= INT_VSY;
s3_virge_update_irqs(virge);
}
@@ -1795,7 +1837,8 @@ fifo_thread(void *param)
if (virge->cmd_dma)
virge->subsys_stat |= (INT_HOST_DONE | INT_CMD_DONE);
s3_virge_update_irqs(virge);
//s3_virge_update_irqs(virge);
virge->virge_irq_req++;
}
}
@@ -1835,10 +1878,8 @@ s3_virge_queue(virge_t *virge, uint32_t addr, uint32_t val, uint32_t type)
virge->fifo_write_idx++;
if (FIFO_ENTRIES > 0xe000)
wake_fifo_thread(virge);
if (FIFO_ENTRIES > 0xe000 || FIFO_ENTRIES < 8)
wake_fifo_thread(virge);
if (FIFO_ENTRIES > 0xe000 || FIFO_ENTRIES < 16)
s3_virge_wake_fifo_thread(virge);
}
static void
@@ -3642,7 +3683,8 @@ render_thread(void *param)
}
virge->s3d_busy = 0;
virge->subsys_stat |= INT_S3D_DONE;
s3_virge_update_irqs(virge);
//s3_virge_update_irqs(virge);
virge->virge_irq_req++;
}
}
@@ -4571,6 +4613,9 @@ s3_virge_init(const device_t *info)
virge->fifo_not_full_event = thread_create_event();
virge->fifo_thread = thread_create(fifo_thread, virge);
timer_add(&virge->wake_timer, s3_virge_wake_fifo_timer, virge, 0);
timer_add(&virge->irq_timer, s3_virge_update_irq_timer, virge, 0);
virge->local = info->local;
*reset_state = *virge;