diff options
| -rw-r--r-- | hw/lsi53c895a.c | 68 |
1 files changed, 28 insertions, 40 deletions
diff --git a/hw/lsi53c895a.c b/hw/lsi53c895a.c index f6660a314a..b9382e3aa6 100644 --- a/hw/lsi53c895a.c +++ b/hw/lsi53c895a.c @@ -173,11 +173,12 @@ do { fprintf(stderr, "lsi_scsi: error: " fmt , ## __VA_ARGS__);} while (0) /* Flag set if this is a tagged command. */ #define LSI_TAG_VALID (1 << 16) -typedef struct { +typedef struct lsi_request { uint32_t tag; uint32_t pending; int out; -} lsi_queue; + QTAILQ_ENTRY(lsi_request) next; +} lsi_request; typedef struct { PCIDevice dev; @@ -205,9 +206,7 @@ typedef struct { uint32_t current_dma_len; int command_complete; uint8_t *dma_buf; - lsi_queue *queue; - int queue_len; - int active_commands; + QTAILQ_HEAD(, lsi_request) queue; uint32_t dsa; uint32_t temp; @@ -391,9 +390,9 @@ static void lsi_stop_script(LSIState *s) static void lsi_update_irq(LSIState *s) { - int i; int level; static int last_level; + lsi_request *p; /* It's unclear whether the DIP/SIP bits should be cleared when the Interrupt Status Registers are cleared or when istat0 is read. @@ -427,9 +426,9 @@ static void lsi_update_irq(LSIState *s) if (!level && lsi_irq_on_rsl(s) && !(s->scntl1 & LSI_SCNTL1_CON)) { DPRINTF("Handled IRQs & disconnected, looking for pending " "processes\n"); - for (i = 0; i < s->active_commands; i++) { - if (s->queue[i].pending) { - lsi_reselect(s, s->queue[i].tag); + QTAILQ_FOREACH(p, &s->queue, next) { + if (p->pending) { + lsi_reselect(s, p->tag); break; } } @@ -563,14 +562,11 @@ static void lsi_do_dma(LSIState *s, int out) /* Add a command to the queue. */ static void lsi_queue_command(LSIState *s) { - lsi_queue *p; + lsi_request *p; DPRINTF("Queueing tag=0x%x\n", s->current_tag); - if (s->queue_len == s->active_commands) { - s->queue_len++; - s->queue = qemu_realloc(s->queue, s->queue_len * sizeof(lsi_queue)); - } - p = &s->queue[s->active_commands++]; + p = qemu_mallocz(sizeof(*p)); + QTAILQ_INSERT_TAIL(&s->queue, p, next); p->tag = s->current_tag; p->pending = 0; p->out = (s->sstat1 & PHASE_MASK) == PHASE_DO; @@ -590,17 +586,14 @@ static void lsi_add_msg_byte(LSIState *s, uint8_t data) /* Perform reselection to continue a command. */ static void lsi_reselect(LSIState *s, uint32_t tag) { - lsi_queue *p; - int n; + lsi_request *p; int id; - p = NULL; - for (n = 0; n < s->active_commands; n++) { - p = &s->queue[n]; + QTAILQ_FOREACH(p, &s->queue, next) { if (p->tag == tag) break; } - if (n == s->active_commands) { + if (p == NULL) { BADF("Reselected non-existant command tag=0x%x\n", tag); return; } @@ -624,10 +617,8 @@ static void lsi_reselect(LSIState *s, uint32_t tag) lsi_add_msg_byte(s, tag & 0xff); } - s->active_commands--; - if (n != s->active_commands) { - s->queue[n] = s->queue[s->active_commands]; - } + QTAILQ_REMOVE(&s->queue, p, next); + qemu_free(p); if (lsi_irq_on_rsl(s)) { lsi_script_scsi_interrupt(s, LSI_SIST0_RSL, 0); @@ -638,10 +629,9 @@ static void lsi_reselect(LSIState *s, uint32_t tag) the device was reselected, nonzero if the IO is deferred. */ static int lsi_queue_tag(LSIState *s, uint32_t tag, uint32_t arg) { - lsi_queue *p; - int i; - for (i = 0; i < s->active_commands; i++) { - p = &s->queue[i]; + lsi_request *p; + + QTAILQ_FOREACH(p, &s->queue, next) { if (p->tag == tag) { if (p->pending) { BADF("Multiple IO pending for tag %d\n", tag); @@ -659,7 +649,7 @@ static int lsi_queue_tag(LSIState *s, uint32_t tag, uint32_t arg) lsi_reselect(s, tag); return 0; } else { - DPRINTF("Queueing IO tag=0x%x\n", tag); + DPRINTF("Queueing IO tag=0x%x\n", tag); p->pending = arg; return 1; } @@ -905,13 +895,15 @@ static void lsi_memcpy(LSIState *s, uint32_t dest, uint32_t src, int count) static void lsi_wait_reselect(LSIState *s) { - int i; + lsi_request *p; + DPRINTF("Wait Reselect\n"); if (s->current_dma_len) BADF("Reselect with pending DMA\n"); - for (i = 0; i < s->active_commands; i++) { - if (s->queue[i].pending) { - lsi_reselect(s, s->queue[i].tag); + + QTAILQ_FOREACH(p, &s->queue, next) { + if (p->pending) { + lsi_reselect(s, p->tag); break; } } @@ -2008,7 +2000,7 @@ static void lsi_pre_save(void *opaque) assert(s->dma_buf == NULL); assert(s->current_dma_len == 0); - assert(s->active_commands == 0); + assert(QTAILQ_EMPTY(&s->queue)); } static const VMStateDescription vmstate_lsi_scsi = { @@ -2101,8 +2093,6 @@ static int lsi_scsi_uninit(PCIDevice *d) cpu_unregister_io_memory(s->mmio_io_addr); cpu_unregister_io_memory(s->ram_io_addr); - qemu_free(s->queue); - return 0; } @@ -2140,9 +2130,7 @@ static int lsi_scsi_init(PCIDevice *dev) PCI_BASE_ADDRESS_SPACE_MEMORY, lsi_mmio_mapfunc); pci_register_bar((struct PCIDevice *)s, 2, 0x2000, PCI_BASE_ADDRESS_SPACE_MEMORY, lsi_ram_mapfunc); - s->queue = qemu_malloc(sizeof(lsi_queue)); - s->queue_len = 1; - s->active_commands = 0; + QTAILQ_INIT(&s->queue); lsi_soft_reset(s); |