void spu_invalidate_slbs(struct spu *spu)
{
struct spu_priv2 __iomem *priv2 = spu->priv2;
+ unsigned long flags;
+ spin_lock_irqsave(&spu->register_lock, flags);
if (spu_mfc_sr1_get(spu) & MFC_STATE1_RELOCATE_MASK)
out_be64(&priv2->slb_invalidate_all_W, 0UL);
+ spin_unlock_irqrestore(&spu->register_lock, flags);
}
EXPORT_SYMBOL_GPL(spu_invalidate_slbs);
}
EXPORT_SYMBOL_GPL(spu_64k_pages_available);
-static int __spu_trap_invalid_dma(struct spu *spu)
-{
- pr_debug("%s\n", __FUNCTION__);
- spu->dma_callback(spu, SPE_EVENT_INVALID_DMA);
- return 0;
-}
-
-static int __spu_trap_dma_align(struct spu *spu)
-{
- pr_debug("%s\n", __FUNCTION__);
- spu->dma_callback(spu, SPE_EVENT_DMA_ALIGNMENT);
- return 0;
-}
-
-static int __spu_trap_error(struct spu *spu)
-{
- pr_debug("%s\n", __FUNCTION__);
- spu->dma_callback(spu, SPE_EVENT_SPE_ERROR);
- return 0;
-}
-
static void spu_restart_dma(struct spu *spu)
{
struct spu_priv2 __iomem *priv2 = spu->priv2;
__func__, slbe, slb->vsid, slb->esid);
out_be64(&priv2->slb_index_W, slbe);
+ /* set invalid before writing vsid */
+ out_be64(&priv2->slb_esid_RW, 0);
+ /* now it's safe to write the vsid */
out_be64(&priv2->slb_vsid_RW, slb->vsid);
+ /* setting the new esid makes the entry valid again */
out_be64(&priv2->slb_esid_RW, slb->esid);
}
struct spu_slb slb;
int psize;
- pr_debug("%s\n", __FUNCTION__);
+ pr_debug("%s\n", __func__);
- if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
- /* SLBs are pre-loaded for context switch, so
- * we should never get here!
- */
- printk("%s: invalid access during switch!\n", __func__);
- return 1;
- }
slb.esid = (ea & ESID_MASK) | SLB_ESID_V;
switch(REGION_ID(ea)) {
extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap); //XXX
static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr)
{
- pr_debug("%s, %lx, %lx\n", __FUNCTION__, dsisr, ea);
+ pr_debug("%s, %lx, %lx\n", __func__, dsisr, ea);
/* Handle kernel space hash faults immediately.
User hash faults need to be deferred to process context. */
return 0;
}
- if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
- printk("%s: invalid access during switch!\n", __func__);
- return 1;
- }
-
+ spu->class_0_pending = 0;
spu->dar = ea;
spu->dsisr = dsisr;
- mb();
+
spu->stop_callback(spu);
+
return 0;
}
slb->esid = (ea & ESID_MASK) | SLB_ESID_V;
}
+/**
+ * Given an array of @nr_slbs SLB entries, @slbs, return non-zero if the
+ * address @new_addr is present.
+ */
+static inline int __slb_present(struct spu_slb *slbs, int nr_slbs,
+ void *new_addr)
+{
+ unsigned long ea = (unsigned long)new_addr;
+ int i;
+
+ for (i = 0; i < nr_slbs; i++)
+ if (!((slbs[i].esid ^ ea) & ESID_MASK))
+ return 1;
+
+ return 0;
+}
+
/**
* Setup the SPU kernel SLBs, in preparation for a context save/restore. We
* need to map both the context save area, and the save/restore code.
+ *
+ * Because the lscsa and code may cross segment boundaires, we check to see
+ * if mappings are required for the start and end of each range. We currently
+ * assume that the mappings are smaller that one segment - if not, something
+ * is seriously wrong.
*/
-void spu_setup_kernel_slbs(struct spu *spu, struct spu_lscsa *lscsa, void *code)
+void spu_setup_kernel_slbs(struct spu *spu, struct spu_lscsa *lscsa,
+ void *code, int code_size)
{
- struct spu_slb code_slb, lscsa_slb;
+ struct spu_slb slbs[4];
+ int i, nr_slbs = 0;
+ /* start and end addresses of both mappings */
+ void *addrs[] = {
+ lscsa, (void *)lscsa + sizeof(*lscsa) - 1,
+ code, code + code_size - 1
+ };
+
+ /* check the set of addresses, and create a new entry in the slbs array
+ * if there isn't already a SLB for that address */
+ for (i = 0; i < ARRAY_SIZE(addrs); i++) {
+ if (__slb_present(slbs, nr_slbs, addrs[i]))
+ continue;
- __spu_kernel_slb(lscsa, &lscsa_slb);
- __spu_kernel_slb(code, &code_slb);
+ __spu_kernel_slb(addrs[i], &slbs[nr_slbs]);
+ nr_slbs++;
+ }
- spu_load_slb(spu, 0, &lscsa_slb);
- if (lscsa_slb.esid != code_slb.esid)
- spu_load_slb(spu, 1, &code_slb);
+ spin_lock_irq(&spu->register_lock);
+ /* Add the set of SLBs */
+ for (i = 0; i < nr_slbs; i++)
+ spu_load_slb(spu, i, &slbs[i]);
+ spin_unlock_irq(&spu->register_lock);
}
EXPORT_SYMBOL_GPL(spu_setup_kernel_slbs);
spu = data;
+ spin_lock(&spu->register_lock);
mask = spu_int_mask_get(spu, 0);
- stat = spu_int_stat_get(spu, 0);
- stat &= mask;
+ stat = spu_int_stat_get(spu, 0) & mask;
- spin_lock(&spu->register_lock);
spu->class_0_pending |= stat;
+ spu->dsisr = spu_mfc_dsisr_get(spu);
+ spu->dar = spu_mfc_dar_get(spu);
spin_unlock(&spu->register_lock);
spu->stop_callback(spu);
return IRQ_HANDLED;
}
-int
-spu_irq_class_0_bottom(struct spu *spu)
-{
- unsigned long flags;
- unsigned long stat;
-
- spin_lock_irqsave(&spu->register_lock, flags);
- stat = spu->class_0_pending;
- spu->class_0_pending = 0;
-
- if (stat & 1) /* invalid DMA alignment */
- __spu_trap_dma_align(spu);
-
- if (stat & 2) /* invalid MFC DMA */
- __spu_trap_invalid_dma(spu);
-
- if (stat & 4) /* error on SPU */
- __spu_trap_error(spu);
-
- spin_unlock_irqrestore(&spu->register_lock, flags);
-
- return (stat & 0x7) ? -EIO : 0;
-}
-EXPORT_SYMBOL_GPL(spu_irq_class_0_bottom);
-
static irqreturn_t
spu_irq_class_1(int irq, void *data)
{
stat = spu_int_stat_get(spu, 1) & mask;
dar = spu_mfc_dar_get(spu);
dsisr = spu_mfc_dsisr_get(spu);
- if (stat & 2) /* mapping fault */
+ if (stat & CLASS1_STORAGE_FAULT_INTR)
spu_mfc_dsisr_set(spu, 0ul);
spu_int_stat_clear(spu, 1, stat);
- spin_unlock(&spu->register_lock);
- pr_debug("%s: %lx %lx %lx %lx\n", __FUNCTION__, mask, stat,
- dar, dsisr);
- if (stat & 1) /* segment fault */
+ if (stat & CLASS1_SEGMENT_FAULT_INTR)
__spu_trap_data_seg(spu, dar);
- if (stat & 2) { /* mapping fault */
+ spin_unlock(&spu->register_lock);
+ pr_debug("%s: %lx %lx %lx %lx\n", __func__, mask, stat,
+ dar, dsisr);
+
+ if (stat & CLASS1_STORAGE_FAULT_INTR)
__spu_trap_data_map(spu, dar, dsisr);
- }
- if (stat & 4) /* ls compare & suspend on get */
+ if (stat & CLASS1_LS_COMPARE_SUSPEND_ON_GET_INTR)
;
- if (stat & 8) /* ls compare & suspend on put */
+ if (stat & CLASS1_LS_COMPARE_SUSPEND_ON_PUT_INTR)
;
return stat ? IRQ_HANDLED : IRQ_NONE;
struct spu *spu;
unsigned long stat;
unsigned long mask;
+ const int mailbox_intrs =
+ CLASS2_MAILBOX_THRESHOLD_INTR | CLASS2_MAILBOX_INTR;
spu = data;
spin_lock(&spu->register_lock);
mask = spu_int_mask_get(spu, 2);
/* ignore interrupts we're not waiting for */
stat &= mask;
- /*
- * mailbox interrupts (0x1 and 0x10) are level triggered.
- * mask them now before acknowledging.
- */
- if (stat & 0x11)
- spu_int_mask_and(spu, 2, ~(stat & 0x11));
+
+ /* mailbox interrupts are level triggered. mask them now before
+ * acknowledging */
+ if (stat & mailbox_intrs)
+ spu_int_mask_and(spu, 2, ~(stat & mailbox_intrs));
/* acknowledge all interrupts before the callbacks */
spu_int_stat_clear(spu, 2, stat);
spin_unlock(&spu->register_lock);
pr_debug("class 2 interrupt %d, %lx, %lx\n", irq, stat, mask);
- if (stat & 1) /* PPC core mailbox */
+ if (stat & CLASS2_MAILBOX_INTR)
spu->ibox_callback(spu);
- if (stat & 2) /* SPU stop-and-signal */
+ if (stat & CLASS2_SPU_STOP_INTR)
spu->stop_callback(spu);
- if (stat & 4) /* SPU halted */
+ if (stat & CLASS2_SPU_HALT_INTR)
spu->stop_callback(spu);
- if (stat & 8) /* DMA tag group complete */
+ if (stat & CLASS2_SPU_DMA_TAG_GROUP_COMPLETE_INTR)
spu->mfc_callback(spu);
- if (stat & 0x10) /* SPU mailbox threshold */
+ if (stat & CLASS2_MAILBOX_THRESHOLD_INTR)
spu->wbox_callback(spu);
spu->stats.class2_intr++;
}
static struct sysdev_class spu_sysdev_class = {
- set_kset_name("spu"),
+ .name = "spu",
.shutdown = spu_shutdown,
};
int spu_add_sysdev_attr_group(struct attribute_group *attrs)
{
struct spu *spu;
+ int rc = 0;
mutex_lock(&spu_full_list_mutex);
- list_for_each_entry(spu, &spu_full_list, full_list)
- sysfs_create_group(&spu->sysdev.kobj, attrs);
+ list_for_each_entry(spu, &spu_full_list, full_list) {
+ rc = sysfs_create_group(&spu->sysdev.kobj, attrs);
+
+ /* we're in trouble here, but try unwinding anyway */
+ if (rc) {
+ printk(KERN_ERR "%s: can't create sysfs group '%s'\n",
+ __func__, attrs->name);
+
+ list_for_each_entry_continue_reverse(spu,
+ &spu_full_list, full_list)
+ sysfs_remove_group(&spu->sysdev.kobj, attrs);
+ break;
+ }
+ }
+
mutex_unlock(&spu_full_list_mutex);
- return 0;
+ return rc;
}
EXPORT_SYMBOL_GPL(spu_add_sysdev_attr_group);
if (ret < 0) {
printk(KERN_WARNING "%s: Error initializing spus\n",
- __FUNCTION__);
+ __func__);
goto out_unregister_sysdev_class;
}
projects / linux-2.6 / blobdiff