diff options
Diffstat (limited to 'arch/powerpc/platforms/cell/spu_base.c')
-rw-r--r-- | arch/powerpc/platforms/cell/spu_base.c | 224 |
1 files changed, 145 insertions, 79 deletions
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c index a08862203643..e45cfa84911f 100644 --- a/arch/powerpc/platforms/cell/spu_base.c +++ b/arch/powerpc/platforms/cell/spu_base.c @@ -34,6 +34,7 @@ #include <linux/linux_logo.h> #include <asm/spu.h> #include <asm/spu_priv1.h> +#include <asm/spu_csa.h> #include <asm/xmon.h> #include <asm/prom.h> @@ -47,6 +48,13 @@ struct cbe_spu_info cbe_spu_info[MAX_NUMNODES]; EXPORT_SYMBOL_GPL(cbe_spu_info); /* + * The spufs fault-handling code needs to call force_sig_info to raise signals + * on DMA errors. Export it here to avoid general kernel-wide access to this + * function + */ +EXPORT_SYMBOL_GPL(force_sig_info); + +/* * Protects cbe_spu_info and spu->number. */ static DEFINE_SPINLOCK(spu_lock); @@ -66,6 +74,10 @@ static LIST_HEAD(spu_full_list); static DEFINE_SPINLOCK(spu_full_list_lock); static DEFINE_MUTEX(spu_full_list_mutex); +struct spu_slb { + u64 esid, vsid; +}; + void spu_invalidate_slbs(struct spu *spu) { struct spu_priv2 __iomem *priv2 = spu->priv2; @@ -114,40 +126,36 @@ void spu_associate_mm(struct spu *spu, struct mm_struct *mm) } EXPORT_SYMBOL_GPL(spu_associate_mm); -static int __spu_trap_invalid_dma(struct spu *spu) +int spu_64k_pages_available(void) { - pr_debug("%s\n", __FUNCTION__); - spu->dma_callback(spu, SPE_EVENT_INVALID_DMA); - return 0; + return mmu_psize_defs[MMU_PAGE_64K].shift != 0; } +EXPORT_SYMBOL_GPL(spu_64k_pages_available); -static int __spu_trap_dma_align(struct spu *spu) +static void spu_restart_dma(struct spu *spu) { - pr_debug("%s\n", __FUNCTION__); - spu->dma_callback(spu, SPE_EVENT_DMA_ALIGNMENT); - return 0; -} + struct spu_priv2 __iomem *priv2 = spu->priv2; -static int __spu_trap_error(struct spu *spu) -{ - pr_debug("%s\n", __FUNCTION__); - spu->dma_callback(spu, SPE_EVENT_SPE_ERROR); - return 0; + if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags)) + out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND); } -static void spu_restart_dma(struct spu *spu) +static inline void spu_load_slb(struct spu *spu, int slbe, struct spu_slb *slb) { struct spu_priv2 __iomem *priv2 = spu->priv2; - if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags)) - out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND); + pr_debug("%s: adding SLB[%d] 0x%016lx 0x%016lx\n", + __func__, slbe, slb->vsid, slb->esid); + + out_be64(&priv2->slb_index_W, slbe); + out_be64(&priv2->slb_vsid_RW, slb->vsid); + out_be64(&priv2->slb_esid_RW, slb->esid); } static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) { - struct spu_priv2 __iomem *priv2 = spu->priv2; struct mm_struct *mm = spu->mm; - u64 esid, vsid, llp; + struct spu_slb slb; int psize; pr_debug("%s\n", __FUNCTION__); @@ -159,7 +167,7 @@ static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) printk("%s: invalid access during switch!\n", __func__); return 1; } - esid = (ea & ESID_MASK) | SLB_ESID_V; + slb.esid = (ea & ESID_MASK) | SLB_ESID_V; switch(REGION_ID(ea)) { case USER_REGION_ID: @@ -168,21 +176,21 @@ static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) #else psize = mm->context.user_psize; #endif - vsid = (get_vsid(mm->context.id, ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) | - SLB_VSID_USER; + slb.vsid = (get_vsid(mm->context.id, ea, MMU_SEGSIZE_256M) + << SLB_VSID_SHIFT) | SLB_VSID_USER; break; case VMALLOC_REGION_ID: if (ea < VMALLOC_END) psize = mmu_vmalloc_psize; else psize = mmu_io_psize; - vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) | - SLB_VSID_KERNEL; + slb.vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) + << SLB_VSID_SHIFT) | SLB_VSID_KERNEL; break; case KERNEL_REGION_ID: psize = mmu_linear_psize; - vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) | - SLB_VSID_KERNEL; + slb.vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) + << SLB_VSID_SHIFT) | SLB_VSID_KERNEL; break; default: /* Future: support kernel segments so that drivers @@ -191,11 +199,9 @@ static int __spu_trap_data_seg(struct spu *spu, unsigned long ea) pr_debug("invalid region access at %016lx\n", ea); return 1; } - llp = mmu_psize_defs[psize].sllp; + slb.vsid |= mmu_psize_defs[psize].sllp; - out_be64(&priv2->slb_index_W, spu->slb_replace); - out_be64(&priv2->slb_vsid_RW, vsid | llp); - out_be64(&priv2->slb_esid_RW, esid); + spu_load_slb(spu, spu->slb_replace, &slb); spu->slb_replace++; if (spu->slb_replace >= 8) @@ -225,13 +231,83 @@ static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr) return 1; } + spu->class_0_pending = 0; spu->dar = ea; spu->dsisr = dsisr; - mb(); + spu->stop_callback(spu); + + return 0; +} + +static void __spu_kernel_slb(void *addr, struct spu_slb *slb) +{ + unsigned long ea = (unsigned long)addr; + u64 llp; + + if (REGION_ID(ea) == KERNEL_REGION_ID) + llp = mmu_psize_defs[mmu_linear_psize].sllp; + else + llp = mmu_psize_defs[mmu_virtual_psize].sllp; + + slb->vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) | + SLB_VSID_KERNEL | llp; + 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, int code_size) +{ + 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(addrs[i], &slbs[nr_slbs]); + nr_slbs++; + } + + /* Add the set of SLBs */ + for (i = 0; i < nr_slbs; i++) + spu_load_slb(spu, i, &slbs[i]); +} +EXPORT_SYMBOL_GPL(spu_setup_kernel_slbs); + static irqreturn_t spu_irq_class_0(int irq, void *data) { @@ -240,12 +316,13 @@ spu_irq_class_0(int irq, void *data) 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); @@ -255,31 +332,6 @@ spu_irq_class_0(int irq, void *data) 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) { @@ -294,24 +346,23 @@ 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 */ + 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; @@ -323,6 +374,8 @@ spu_irq_class_2(int irq, void *data) 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); @@ -330,31 +383,30 @@ spu_irq_class_2(int irq, void *data) 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++; @@ -479,13 +531,27 @@ EXPORT_SYMBOL_GPL(spu_add_sysdev_attr); 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); |