mirror of https://gitee.com/openkylin/linux.git
981 lines
22 KiB
C
981 lines
22 KiB
C
/*
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* Low-level SPU handling
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*
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* (C) Copyright IBM Deutschland Entwicklung GmbH 2005
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*
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* Author: Arnd Bergmann <arndb@de.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#undef DEBUG
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/poll.h>
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#include <linux/ptrace.h>
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#include <linux/slab.h>
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#include <linux/wait.h>
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#include <asm/firmware.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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#include <linux/mutex.h>
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#include <asm/spu.h>
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#include <asm/spu_priv1.h>
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#include <asm/mmu_context.h>
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#include <asm/xmon.h>
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#include "interrupt.h"
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const struct spu_priv1_ops *spu_priv1_ops;
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EXPORT_SYMBOL_GPL(spu_priv1_ops);
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static int __spu_trap_invalid_dma(struct spu *spu)
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{
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pr_debug("%s\n", __FUNCTION__);
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spu->dma_callback(spu, SPE_EVENT_INVALID_DMA);
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return 0;
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}
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static int __spu_trap_dma_align(struct spu *spu)
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{
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pr_debug("%s\n", __FUNCTION__);
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spu->dma_callback(spu, SPE_EVENT_DMA_ALIGNMENT);
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return 0;
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}
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static int __spu_trap_error(struct spu *spu)
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{
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pr_debug("%s\n", __FUNCTION__);
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spu->dma_callback(spu, SPE_EVENT_SPE_ERROR);
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return 0;
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}
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static void spu_restart_dma(struct spu *spu)
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{
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struct spu_priv2 __iomem *priv2 = spu->priv2;
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if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags))
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out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND);
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}
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static int __spu_trap_data_seg(struct spu *spu, unsigned long ea)
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{
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struct spu_priv2 __iomem *priv2 = spu->priv2;
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struct mm_struct *mm = spu->mm;
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u64 esid, vsid, llp;
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pr_debug("%s\n", __FUNCTION__);
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if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
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/* SLBs are pre-loaded for context switch, so
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* we should never get here!
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*/
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printk("%s: invalid access during switch!\n", __func__);
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return 1;
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}
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esid = (ea & ESID_MASK) | SLB_ESID_V;
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switch(REGION_ID(ea)) {
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case USER_REGION_ID:
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#ifdef CONFIG_HUGETLB_PAGE
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if (in_hugepage_area(mm->context, ea))
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llp = mmu_psize_defs[mmu_huge_psize].sllp;
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else
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#endif
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llp = mmu_psize_defs[mmu_virtual_psize].sllp;
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vsid = (get_vsid(mm->context.id, ea) << SLB_VSID_SHIFT) |
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SLB_VSID_USER | llp;
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break;
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case VMALLOC_REGION_ID:
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llp = mmu_psize_defs[mmu_virtual_psize].sllp;
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vsid = (get_kernel_vsid(ea) << SLB_VSID_SHIFT) |
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SLB_VSID_KERNEL | llp;
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break;
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case KERNEL_REGION_ID:
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llp = mmu_psize_defs[mmu_linear_psize].sllp;
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vsid = (get_kernel_vsid(ea) << SLB_VSID_SHIFT) |
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SLB_VSID_KERNEL | llp;
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break;
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default:
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/* Future: support kernel segments so that drivers
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* can use SPUs.
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*/
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pr_debug("invalid region access at %016lx\n", ea);
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return 1;
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}
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out_be64(&priv2->slb_index_W, spu->slb_replace);
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out_be64(&priv2->slb_vsid_RW, vsid);
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out_be64(&priv2->slb_esid_RW, esid);
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spu->slb_replace++;
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if (spu->slb_replace >= 8)
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spu->slb_replace = 0;
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spu_restart_dma(spu);
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return 0;
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}
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extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap); //XXX
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static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr)
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{
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pr_debug("%s, %lx, %lx\n", __FUNCTION__, dsisr, ea);
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/* Handle kernel space hash faults immediately.
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User hash faults need to be deferred to process context. */
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if ((dsisr & MFC_DSISR_PTE_NOT_FOUND)
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&& REGION_ID(ea) != USER_REGION_ID
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&& hash_page(ea, _PAGE_PRESENT, 0x300) == 0) {
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spu_restart_dma(spu);
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return 0;
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}
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if (test_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags)) {
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printk("%s: invalid access during switch!\n", __func__);
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return 1;
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}
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spu->dar = ea;
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spu->dsisr = dsisr;
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mb();
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spu->stop_callback(spu);
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return 0;
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}
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static irqreturn_t
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spu_irq_class_0(int irq, void *data)
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{
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struct spu *spu;
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spu = data;
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spu->class_0_pending = 1;
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spu->stop_callback(spu);
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return IRQ_HANDLED;
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}
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int
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spu_irq_class_0_bottom(struct spu *spu)
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{
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unsigned long stat, mask;
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spu->class_0_pending = 0;
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mask = spu_int_mask_get(spu, 0);
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stat = spu_int_stat_get(spu, 0);
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stat &= mask;
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if (stat & 1) /* invalid DMA alignment */
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__spu_trap_dma_align(spu);
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if (stat & 2) /* invalid MFC DMA */
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__spu_trap_invalid_dma(spu);
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if (stat & 4) /* error on SPU */
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__spu_trap_error(spu);
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spu_int_stat_clear(spu, 0, stat);
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return (stat & 0x7) ? -EIO : 0;
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}
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EXPORT_SYMBOL_GPL(spu_irq_class_0_bottom);
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static irqreturn_t
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spu_irq_class_1(int irq, void *data)
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{
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struct spu *spu;
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unsigned long stat, mask, dar, dsisr;
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spu = data;
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/* atomically read & clear class1 status. */
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spin_lock(&spu->register_lock);
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mask = spu_int_mask_get(spu, 1);
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stat = spu_int_stat_get(spu, 1) & mask;
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dar = spu_mfc_dar_get(spu);
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dsisr = spu_mfc_dsisr_get(spu);
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if (stat & 2) /* mapping fault */
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spu_mfc_dsisr_set(spu, 0ul);
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spu_int_stat_clear(spu, 1, stat);
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spin_unlock(&spu->register_lock);
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pr_debug("%s: %lx %lx %lx %lx\n", __FUNCTION__, mask, stat,
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dar, dsisr);
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if (stat & 1) /* segment fault */
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__spu_trap_data_seg(spu, dar);
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if (stat & 2) { /* mapping fault */
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__spu_trap_data_map(spu, dar, dsisr);
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}
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if (stat & 4) /* ls compare & suspend on get */
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;
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if (stat & 8) /* ls compare & suspend on put */
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;
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return stat ? IRQ_HANDLED : IRQ_NONE;
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}
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EXPORT_SYMBOL_GPL(spu_irq_class_1_bottom);
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static irqreturn_t
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spu_irq_class_2(int irq, void *data)
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{
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struct spu *spu;
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unsigned long stat;
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unsigned long mask;
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spu = data;
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spin_lock(&spu->register_lock);
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stat = spu_int_stat_get(spu, 2);
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mask = spu_int_mask_get(spu, 2);
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/* ignore interrupts we're not waiting for */
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stat &= mask;
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/*
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* mailbox interrupts (0x1 and 0x10) are level triggered.
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* mask them now before acknowledging.
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*/
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if (stat & 0x11)
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spu_int_mask_and(spu, 2, ~(stat & 0x11));
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/* acknowledge all interrupts before the callbacks */
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spu_int_stat_clear(spu, 2, stat);
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spin_unlock(&spu->register_lock);
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pr_debug("class 2 interrupt %d, %lx, %lx\n", irq, stat, mask);
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if (stat & 1) /* PPC core mailbox */
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spu->ibox_callback(spu);
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if (stat & 2) /* SPU stop-and-signal */
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spu->stop_callback(spu);
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if (stat & 4) /* SPU halted */
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spu->stop_callback(spu);
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if (stat & 8) /* DMA tag group complete */
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spu->mfc_callback(spu);
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if (stat & 0x10) /* SPU mailbox threshold */
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spu->wbox_callback(spu);
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return stat ? IRQ_HANDLED : IRQ_NONE;
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}
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static int spu_request_irqs(struct spu *spu)
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{
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int ret = 0;
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if (spu->irqs[0] != NO_IRQ) {
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snprintf(spu->irq_c0, sizeof (spu->irq_c0), "spe%02d.0",
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spu->number);
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ret = request_irq(spu->irqs[0], spu_irq_class_0,
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IRQF_DISABLED,
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spu->irq_c0, spu);
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if (ret)
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goto bail0;
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}
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if (spu->irqs[1] != NO_IRQ) {
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snprintf(spu->irq_c1, sizeof (spu->irq_c1), "spe%02d.1",
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spu->number);
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ret = request_irq(spu->irqs[1], spu_irq_class_1,
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IRQF_DISABLED,
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spu->irq_c1, spu);
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if (ret)
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goto bail1;
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}
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if (spu->irqs[2] != NO_IRQ) {
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snprintf(spu->irq_c2, sizeof (spu->irq_c2), "spe%02d.2",
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spu->number);
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ret = request_irq(spu->irqs[2], spu_irq_class_2,
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IRQF_DISABLED,
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spu->irq_c2, spu);
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if (ret)
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goto bail2;
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}
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return 0;
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bail2:
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if (spu->irqs[1] != NO_IRQ)
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free_irq(spu->irqs[1], spu);
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bail1:
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if (spu->irqs[0] != NO_IRQ)
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free_irq(spu->irqs[0], spu);
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bail0:
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return ret;
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}
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static void spu_free_irqs(struct spu *spu)
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{
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if (spu->irqs[0] != NO_IRQ)
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free_irq(spu->irqs[0], spu);
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if (spu->irqs[1] != NO_IRQ)
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free_irq(spu->irqs[1], spu);
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if (spu->irqs[2] != NO_IRQ)
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free_irq(spu->irqs[2], spu);
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}
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static struct list_head spu_list[MAX_NUMNODES];
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static LIST_HEAD(spu_full_list);
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static DEFINE_MUTEX(spu_mutex);
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static void spu_init_channels(struct spu *spu)
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{
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static const struct {
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unsigned channel;
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unsigned count;
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} zero_list[] = {
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{ 0x00, 1, }, { 0x01, 1, }, { 0x03, 1, }, { 0x04, 1, },
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{ 0x18, 1, }, { 0x19, 1, }, { 0x1b, 1, }, { 0x1d, 1, },
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}, count_list[] = {
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{ 0x00, 0, }, { 0x03, 0, }, { 0x04, 0, }, { 0x15, 16, },
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{ 0x17, 1, }, { 0x18, 0, }, { 0x19, 0, }, { 0x1b, 0, },
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{ 0x1c, 1, }, { 0x1d, 0, }, { 0x1e, 1, },
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};
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struct spu_priv2 __iomem *priv2;
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int i;
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priv2 = spu->priv2;
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/* initialize all channel data to zero */
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for (i = 0; i < ARRAY_SIZE(zero_list); i++) {
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int count;
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out_be64(&priv2->spu_chnlcntptr_RW, zero_list[i].channel);
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for (count = 0; count < zero_list[i].count; count++)
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out_be64(&priv2->spu_chnldata_RW, 0);
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}
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/* initialize channel counts to meaningful values */
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for (i = 0; i < ARRAY_SIZE(count_list); i++) {
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out_be64(&priv2->spu_chnlcntptr_RW, count_list[i].channel);
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out_be64(&priv2->spu_chnlcnt_RW, count_list[i].count);
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}
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}
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struct spu *spu_alloc_node(int node)
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{
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struct spu *spu = NULL;
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mutex_lock(&spu_mutex);
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if (!list_empty(&spu_list[node])) {
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spu = list_entry(spu_list[node].next, struct spu, list);
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list_del_init(&spu->list);
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pr_debug("Got SPU %d %d\n", spu->number, spu->node);
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spu_init_channels(spu);
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}
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mutex_unlock(&spu_mutex);
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return spu;
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}
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EXPORT_SYMBOL_GPL(spu_alloc_node);
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struct spu *spu_alloc(void)
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{
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struct spu *spu = NULL;
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int node;
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for (node = 0; node < MAX_NUMNODES; node++) {
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spu = spu_alloc_node(node);
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if (spu)
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break;
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}
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return spu;
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}
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void spu_free(struct spu *spu)
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{
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mutex_lock(&spu_mutex);
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list_add_tail(&spu->list, &spu_list[spu->node]);
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mutex_unlock(&spu_mutex);
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}
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EXPORT_SYMBOL_GPL(spu_free);
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|
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static int spu_handle_mm_fault(struct spu *spu)
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{
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struct mm_struct *mm = spu->mm;
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struct vm_area_struct *vma;
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u64 ea, dsisr, is_write;
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int ret;
|
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|
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ea = spu->dar;
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dsisr = spu->dsisr;
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#if 0
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if (!IS_VALID_EA(ea)) {
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return -EFAULT;
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}
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#endif /* XXX */
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if (mm == NULL) {
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return -EFAULT;
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}
|
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if (mm->pgd == NULL) {
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return -EFAULT;
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}
|
|
|
|
down_read(&mm->mmap_sem);
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vma = find_vma(mm, ea);
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if (!vma)
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goto bad_area;
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if (vma->vm_start <= ea)
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goto good_area;
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if (!(vma->vm_flags & VM_GROWSDOWN))
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goto bad_area;
|
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#if 0
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if (expand_stack(vma, ea))
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goto bad_area;
|
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#endif /* XXX */
|
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good_area:
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is_write = dsisr & MFC_DSISR_ACCESS_PUT;
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if (is_write) {
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if (!(vma->vm_flags & VM_WRITE))
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goto bad_area;
|
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} else {
|
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if (dsisr & MFC_DSISR_ACCESS_DENIED)
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goto bad_area;
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if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
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goto bad_area;
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}
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ret = 0;
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switch (handle_mm_fault(mm, vma, ea, is_write)) {
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case VM_FAULT_MINOR:
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current->min_flt++;
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break;
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case VM_FAULT_MAJOR:
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current->maj_flt++;
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break;
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case VM_FAULT_SIGBUS:
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ret = -EFAULT;
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goto bad_area;
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case VM_FAULT_OOM:
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ret = -ENOMEM;
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goto bad_area;
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default:
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BUG();
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}
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up_read(&mm->mmap_sem);
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return ret;
|
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|
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bad_area:
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up_read(&mm->mmap_sem);
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return -EFAULT;
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}
|
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|
|
int spu_irq_class_1_bottom(struct spu *spu)
|
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{
|
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u64 ea, dsisr, access, error = 0UL;
|
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int ret = 0;
|
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|
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ea = spu->dar;
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dsisr = spu->dsisr;
|
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if (dsisr & (MFC_DSISR_PTE_NOT_FOUND | MFC_DSISR_ACCESS_DENIED)) {
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u64 flags;
|
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|
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access = (_PAGE_PRESENT | _PAGE_USER);
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access |= (dsisr & MFC_DSISR_ACCESS_PUT) ? _PAGE_RW : 0UL;
|
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local_irq_save(flags);
|
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if (hash_page(ea, access, 0x300) != 0)
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error |= CLASS1_ENABLE_STORAGE_FAULT_INTR;
|
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local_irq_restore(flags);
|
|
}
|
|
if (error & CLASS1_ENABLE_STORAGE_FAULT_INTR) {
|
|
if ((ret = spu_handle_mm_fault(spu)) != 0)
|
|
error |= CLASS1_ENABLE_STORAGE_FAULT_INTR;
|
|
else
|
|
error &= ~CLASS1_ENABLE_STORAGE_FAULT_INTR;
|
|
}
|
|
spu->dar = 0UL;
|
|
spu->dsisr = 0UL;
|
|
if (!error) {
|
|
spu_restart_dma(spu);
|
|
} else {
|
|
spu->dma_callback(spu, SPE_EVENT_SPE_DATA_STORAGE);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int __init find_spu_node_id(struct device_node *spe)
|
|
{
|
|
const unsigned int *id;
|
|
struct device_node *cpu;
|
|
cpu = spe->parent->parent;
|
|
id = get_property(cpu, "node-id", NULL);
|
|
return id ? *id : 0;
|
|
}
|
|
|
|
static int __init cell_spuprop_present(struct spu *spu, struct device_node *spe,
|
|
const char *prop)
|
|
{
|
|
static DEFINE_MUTEX(add_spumem_mutex);
|
|
|
|
const struct address_prop {
|
|
unsigned long address;
|
|
unsigned int len;
|
|
} __attribute__((packed)) *p;
|
|
int proplen;
|
|
|
|
unsigned long start_pfn, nr_pages;
|
|
struct pglist_data *pgdata;
|
|
struct zone *zone;
|
|
int ret;
|
|
|
|
p = get_property(spe, prop, &proplen);
|
|
WARN_ON(proplen != sizeof (*p));
|
|
|
|
start_pfn = p->address >> PAGE_SHIFT;
|
|
nr_pages = ((unsigned long)p->len + PAGE_SIZE - 1) >> PAGE_SHIFT;
|
|
|
|
pgdata = NODE_DATA(spu->nid);
|
|
zone = pgdata->node_zones;
|
|
|
|
/* XXX rethink locking here */
|
|
mutex_lock(&add_spumem_mutex);
|
|
ret = __add_pages(zone, start_pfn, nr_pages);
|
|
mutex_unlock(&add_spumem_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __iomem * __init map_spe_prop(struct spu *spu,
|
|
struct device_node *n, const char *name)
|
|
{
|
|
const struct address_prop {
|
|
unsigned long address;
|
|
unsigned int len;
|
|
} __attribute__((packed)) *prop;
|
|
|
|
const void *p;
|
|
int proplen;
|
|
void __iomem *ret = NULL;
|
|
int err = 0;
|
|
|
|
p = get_property(n, name, &proplen);
|
|
if (proplen != sizeof (struct address_prop))
|
|
return NULL;
|
|
|
|
prop = p;
|
|
|
|
err = cell_spuprop_present(spu, n, name);
|
|
if (err && (err != -EEXIST))
|
|
goto out;
|
|
|
|
ret = ioremap(prop->address, prop->len);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void spu_unmap(struct spu *spu)
|
|
{
|
|
iounmap(spu->priv2);
|
|
iounmap(spu->priv1);
|
|
iounmap(spu->problem);
|
|
iounmap((__force u8 __iomem *)spu->local_store);
|
|
}
|
|
|
|
/* This function shall be abstracted for HV platforms */
|
|
static int __init spu_map_interrupts_old(struct spu *spu, struct device_node *np)
|
|
{
|
|
unsigned int isrc;
|
|
const u32 *tmp;
|
|
|
|
/* Get the interrupt source unit from the device-tree */
|
|
tmp = get_property(np, "isrc", NULL);
|
|
if (!tmp)
|
|
return -ENODEV;
|
|
isrc = tmp[0];
|
|
|
|
/* Add the node number */
|
|
isrc |= spu->node << IIC_IRQ_NODE_SHIFT;
|
|
|
|
/* Now map interrupts of all 3 classes */
|
|
spu->irqs[0] = irq_create_mapping(NULL, IIC_IRQ_CLASS_0 | isrc);
|
|
spu->irqs[1] = irq_create_mapping(NULL, IIC_IRQ_CLASS_1 | isrc);
|
|
spu->irqs[2] = irq_create_mapping(NULL, IIC_IRQ_CLASS_2 | isrc);
|
|
|
|
/* Right now, we only fail if class 2 failed */
|
|
return spu->irqs[2] == NO_IRQ ? -EINVAL : 0;
|
|
}
|
|
|
|
static int __init spu_map_device_old(struct spu *spu, struct device_node *node)
|
|
{
|
|
const char *prop;
|
|
int ret;
|
|
|
|
ret = -ENODEV;
|
|
spu->name = get_property(node, "name", NULL);
|
|
if (!spu->name)
|
|
goto out;
|
|
|
|
prop = get_property(node, "local-store", NULL);
|
|
if (!prop)
|
|
goto out;
|
|
spu->local_store_phys = *(unsigned long *)prop;
|
|
|
|
/* we use local store as ram, not io memory */
|
|
spu->local_store = (void __force *)
|
|
map_spe_prop(spu, node, "local-store");
|
|
if (!spu->local_store)
|
|
goto out;
|
|
|
|
prop = get_property(node, "problem", NULL);
|
|
if (!prop)
|
|
goto out_unmap;
|
|
spu->problem_phys = *(unsigned long *)prop;
|
|
|
|
spu->problem= map_spe_prop(spu, node, "problem");
|
|
if (!spu->problem)
|
|
goto out_unmap;
|
|
|
|
spu->priv1= map_spe_prop(spu, node, "priv1");
|
|
/* priv1 is not available on a hypervisor */
|
|
|
|
spu->priv2= map_spe_prop(spu, node, "priv2");
|
|
if (!spu->priv2)
|
|
goto out_unmap;
|
|
ret = 0;
|
|
goto out;
|
|
|
|
out_unmap:
|
|
spu_unmap(spu);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
|
|
{
|
|
struct of_irq oirq;
|
|
int ret;
|
|
int i;
|
|
|
|
for (i=0; i < 3; i++) {
|
|
ret = of_irq_map_one(np, i, &oirq);
|
|
if (ret) {
|
|
pr_debug("spu_new: failed to get irq %d\n", i);
|
|
goto err;
|
|
}
|
|
ret = -EINVAL;
|
|
pr_debug(" irq %d no 0x%x on %s\n", i, oirq.specifier[0],
|
|
oirq.controller->full_name);
|
|
spu->irqs[i] = irq_create_of_mapping(oirq.controller,
|
|
oirq.specifier, oirq.size);
|
|
if (spu->irqs[i] == NO_IRQ) {
|
|
pr_debug("spu_new: failed to map it !\n");
|
|
goto err;
|
|
}
|
|
}
|
|
return 0;
|
|
|
|
err:
|
|
pr_debug("failed to map irq %x for spu %s\n", *oirq.specifier, spu->name);
|
|
for (; i >= 0; i--) {
|
|
if (spu->irqs[i] != NO_IRQ)
|
|
irq_dispose_mapping(spu->irqs[i]);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int spu_map_resource(struct device_node *node, int nr,
|
|
void __iomem** virt, unsigned long *phys)
|
|
{
|
|
struct resource resource = { };
|
|
int ret;
|
|
|
|
ret = of_address_to_resource(node, nr, &resource);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (phys)
|
|
*phys = resource.start;
|
|
*virt = ioremap(resource.start, resource.end - resource.start);
|
|
if (!*virt)
|
|
ret = -EINVAL;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int __init spu_map_device(struct spu *spu, struct device_node *node)
|
|
{
|
|
int ret = -ENODEV;
|
|
spu->name = get_property(node, "name", NULL);
|
|
if (!spu->name)
|
|
goto out;
|
|
|
|
ret = spu_map_resource(node, 0, (void __iomem**)&spu->local_store,
|
|
&spu->local_store_phys);
|
|
if (ret) {
|
|
pr_debug("spu_new: failed to map %s resource 0\n",
|
|
node->full_name);
|
|
goto out;
|
|
}
|
|
ret = spu_map_resource(node, 1, (void __iomem**)&spu->problem,
|
|
&spu->problem_phys);
|
|
if (ret) {
|
|
pr_debug("spu_new: failed to map %s resource 1\n",
|
|
node->full_name);
|
|
goto out_unmap;
|
|
}
|
|
ret = spu_map_resource(node, 2, (void __iomem**)&spu->priv2,
|
|
NULL);
|
|
if (ret) {
|
|
pr_debug("spu_new: failed to map %s resource 2\n",
|
|
node->full_name);
|
|
goto out_unmap;
|
|
}
|
|
|
|
if (!firmware_has_feature(FW_FEATURE_LPAR))
|
|
ret = spu_map_resource(node, 3, (void __iomem**)&spu->priv1,
|
|
NULL);
|
|
if (ret) {
|
|
pr_debug("spu_new: failed to map %s resource 3\n",
|
|
node->full_name);
|
|
goto out_unmap;
|
|
}
|
|
pr_debug("spu_new: %s maps:\n", node->full_name);
|
|
pr_debug(" local store : 0x%016lx -> 0x%p\n",
|
|
spu->local_store_phys, spu->local_store);
|
|
pr_debug(" problem state : 0x%016lx -> 0x%p\n",
|
|
spu->problem_phys, spu->problem);
|
|
pr_debug(" priv2 : 0x%p\n", spu->priv2);
|
|
pr_debug(" priv1 : 0x%p\n", spu->priv1);
|
|
|
|
return 0;
|
|
|
|
out_unmap:
|
|
spu_unmap(spu);
|
|
out:
|
|
pr_debug("failed to map spe %s: %d\n", spu->name, ret);
|
|
return ret;
|
|
}
|
|
|
|
struct sysdev_class spu_sysdev_class = {
|
|
set_kset_name("spu")
|
|
};
|
|
|
|
int spu_add_sysdev_attr(struct sysdev_attribute *attr)
|
|
{
|
|
struct spu *spu;
|
|
mutex_lock(&spu_mutex);
|
|
|
|
list_for_each_entry(spu, &spu_full_list, full_list)
|
|
sysdev_create_file(&spu->sysdev, attr);
|
|
|
|
mutex_unlock(&spu_mutex);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(spu_add_sysdev_attr);
|
|
|
|
int spu_add_sysdev_attr_group(struct attribute_group *attrs)
|
|
{
|
|
struct spu *spu;
|
|
mutex_lock(&spu_mutex);
|
|
|
|
list_for_each_entry(spu, &spu_full_list, full_list)
|
|
sysfs_create_group(&spu->sysdev.kobj, attrs);
|
|
|
|
mutex_unlock(&spu_mutex);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(spu_add_sysdev_attr_group);
|
|
|
|
|
|
void spu_remove_sysdev_attr(struct sysdev_attribute *attr)
|
|
{
|
|
struct spu *spu;
|
|
mutex_lock(&spu_mutex);
|
|
|
|
list_for_each_entry(spu, &spu_full_list, full_list)
|
|
sysdev_remove_file(&spu->sysdev, attr);
|
|
|
|
mutex_unlock(&spu_mutex);
|
|
}
|
|
EXPORT_SYMBOL_GPL(spu_remove_sysdev_attr);
|
|
|
|
void spu_remove_sysdev_attr_group(struct attribute_group *attrs)
|
|
{
|
|
struct spu *spu;
|
|
mutex_lock(&spu_mutex);
|
|
|
|
list_for_each_entry(spu, &spu_full_list, full_list)
|
|
sysfs_remove_group(&spu->sysdev.kobj, attrs);
|
|
|
|
mutex_unlock(&spu_mutex);
|
|
}
|
|
EXPORT_SYMBOL_GPL(spu_remove_sysdev_attr_group);
|
|
|
|
static int spu_create_sysdev(struct spu *spu)
|
|
{
|
|
int ret;
|
|
|
|
spu->sysdev.id = spu->number;
|
|
spu->sysdev.cls = &spu_sysdev_class;
|
|
ret = sysdev_register(&spu->sysdev);
|
|
if (ret) {
|
|
printk(KERN_ERR "Can't register SPU %d with sysfs\n",
|
|
spu->number);
|
|
return ret;
|
|
}
|
|
|
|
sysfs_add_device_to_node(&spu->sysdev, spu->node);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void spu_destroy_sysdev(struct spu *spu)
|
|
{
|
|
sysfs_remove_device_from_node(&spu->sysdev, spu->node);
|
|
sysdev_unregister(&spu->sysdev);
|
|
}
|
|
|
|
static int __init create_spu(struct device_node *spe)
|
|
{
|
|
struct spu *spu;
|
|
int ret;
|
|
static int number;
|
|
|
|
ret = -ENOMEM;
|
|
spu = kzalloc(sizeof (*spu), GFP_KERNEL);
|
|
if (!spu)
|
|
goto out;
|
|
|
|
spu->node = find_spu_node_id(spe);
|
|
if (spu->node >= MAX_NUMNODES) {
|
|
printk(KERN_WARNING "SPE %s on node %d ignored,"
|
|
" node number too big\n", spe->full_name, spu->node);
|
|
printk(KERN_WARNING "Check if CONFIG_NUMA is enabled.\n");
|
|
return -ENODEV;
|
|
}
|
|
spu->nid = of_node_to_nid(spe);
|
|
if (spu->nid == -1)
|
|
spu->nid = 0;
|
|
|
|
ret = spu_map_device(spu, spe);
|
|
/* try old method */
|
|
if (ret)
|
|
ret = spu_map_device_old(spu, spe);
|
|
if (ret)
|
|
goto out_free;
|
|
|
|
ret = spu_map_interrupts(spu, spe);
|
|
if (ret)
|
|
ret = spu_map_interrupts_old(spu, spe);
|
|
if (ret)
|
|
goto out_unmap;
|
|
spin_lock_init(&spu->register_lock);
|
|
spu_mfc_sdr_setup(spu);
|
|
spu_mfc_sr1_set(spu, 0x33);
|
|
mutex_lock(&spu_mutex);
|
|
|
|
spu->number = number++;
|
|
ret = spu_request_irqs(spu);
|
|
if (ret)
|
|
goto out_unlock;
|
|
|
|
ret = spu_create_sysdev(spu);
|
|
if (ret)
|
|
goto out_free_irqs;
|
|
|
|
list_add(&spu->list, &spu_list[spu->node]);
|
|
list_add(&spu->full_list, &spu_full_list);
|
|
spu->devnode = of_node_get(spe);
|
|
|
|
mutex_unlock(&spu_mutex);
|
|
|
|
pr_debug(KERN_DEBUG "Using SPE %s %p %p %p %p %d\n",
|
|
spu->name, spu->local_store,
|
|
spu->problem, spu->priv1, spu->priv2, spu->number);
|
|
goto out;
|
|
|
|
out_free_irqs:
|
|
spu_free_irqs(spu);
|
|
out_unlock:
|
|
mutex_unlock(&spu_mutex);
|
|
out_unmap:
|
|
spu_unmap(spu);
|
|
out_free:
|
|
kfree(spu);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void destroy_spu(struct spu *spu)
|
|
{
|
|
list_del_init(&spu->list);
|
|
list_del_init(&spu->full_list);
|
|
|
|
of_node_put(spu->devnode);
|
|
|
|
spu_destroy_sysdev(spu);
|
|
spu_free_irqs(spu);
|
|
spu_unmap(spu);
|
|
kfree(spu);
|
|
}
|
|
|
|
static void cleanup_spu_base(void)
|
|
{
|
|
struct spu *spu, *tmp;
|
|
int node;
|
|
|
|
mutex_lock(&spu_mutex);
|
|
for (node = 0; node < MAX_NUMNODES; node++) {
|
|
list_for_each_entry_safe(spu, tmp, &spu_list[node], list)
|
|
destroy_spu(spu);
|
|
}
|
|
mutex_unlock(&spu_mutex);
|
|
sysdev_class_unregister(&spu_sysdev_class);
|
|
}
|
|
module_exit(cleanup_spu_base);
|
|
|
|
static int __init init_spu_base(void)
|
|
{
|
|
struct device_node *node;
|
|
int i, ret;
|
|
|
|
/* create sysdev class for spus */
|
|
ret = sysdev_class_register(&spu_sysdev_class);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for (i = 0; i < MAX_NUMNODES; i++)
|
|
INIT_LIST_HEAD(&spu_list[i]);
|
|
|
|
ret = -ENODEV;
|
|
for (node = of_find_node_by_type(NULL, "spe");
|
|
node; node = of_find_node_by_type(node, "spe")) {
|
|
ret = create_spu(node);
|
|
if (ret) {
|
|
printk(KERN_WARNING "%s: Error initializing %s\n",
|
|
__FUNCTION__, node->name);
|
|
cleanup_spu_base();
|
|
break;
|
|
}
|
|
}
|
|
|
|
xmon_register_spus(&spu_full_list);
|
|
|
|
return ret;
|
|
}
|
|
module_init(init_spu_base);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
|