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Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 

* git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] cell: fix bugs found by sparse
  [POWERPC] spiderpic: enable new style devtree support
  [POWERPC] Update cell_defconfig
  [POWERPC] spufs: add infrastructure for finding elf objects
  [POWERPC] spufs: support new OF device tree format
  [POWERPC] spufs: add support for read/write on cntl
  [POWERPC] spufs: remove support for ancient firmware
  [POWERPC] spufs: make mailbox functions handle multiple elements
  [POWERPC] spufs: use correct pg_prot for mapping SPU local store
  [POWERPC] spufs: Add infrastructure needed for gang scheduling
  [POWERPC] spufs: implement error event delivery to user space
  [POWERPC] spufs: fix context switch during page fault
  [POWERPC] spufs: scheduler support for NUMA.
  [POWERPC] spufs: cell spu problem state mapping updates
This commit is contained in:
Linus Torvalds 2006-10-04 19:01:28 -07:00
parent 97d41e90fe 43b4f4061c
commit a43cdf08a1
17 changed files with 1035 additions and 514 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

60
arch/powerpc/configs/cell_defconfig
View File

@ -1,7 +1,7 @@
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.18-rc6
# Sun Sep 10 10:20:32 2006
# Linux kernel version: 2.6.18
# Wed Oct 4 15:30:50 2006
#
CONFIG_PPC64=y
CONFIG_64BIT=y
@ -22,6 +22,7 @@ CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_PPC_OF=y
CONFIG_PPC_UDBG_16550=y
# CONFIG_GENERIC_TBSYNC is not set
CONFIG_AUDIT_ARCH=y
# CONFIG_DEFAULT_UIMAGE is not set
#
@ -52,10 +53,11 @@ CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
# CONFIG_IPC_NS is not set
# CONFIG_POSIX_MQUEUE is not set
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_TASKSTATS is not set
CONFIG_SYSCTL=y
# CONFIG_UTS_NS is not set
# CONFIG_AUDIT is not set
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
@ -63,7 +65,9 @@ CONFIG_CPUSETS=y
# CONFIG_RELAY is not set
CONFIG_INITRAMFS_SOURCE=""
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
# CONFIG_EMBEDDED is not set
# CONFIG_SYSCTL_SYSCALL is not set
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_ALL is not set
# CONFIG_KALLSYMS_EXTRA_PASS is not set
@ -72,12 +76,12 @@ CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_RT_MUTEXES=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SHMEM=y
CONFIG_SLAB=y
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
# CONFIG_SLOB is not set
@ -96,6 +100,7 @@ CONFIG_STOP_MACHINE=y
#
# Block layer
#
CONFIG_BLOCK=y
# CONFIG_BLK_DEV_IO_TRACE is not set
#
@ -115,12 +120,13 @@ CONFIG_DEFAULT_IOSCHED="anticipatory"
# Platform support
#
CONFIG_PPC_MULTIPLATFORM=y
# CONFIG_PPC_ISERIES is not set
# CONFIG_EMBEDDED6xx is not set
# CONFIG_APUS is not set
# CONFIG_PPC_PSERIES is not set
# CONFIG_PPC_ISERIES is not set
# CONFIG_PPC_PMAC is not set
# CONFIG_PPC_MAPLE is not set
# CONFIG_PPC_PASEMI is not set
CONFIG_PPC_CELL=y
CONFIG_PPC_CELL_NATIVE=y
CONFIG_PPC_IBM_CELL_BLADE=y
@ -142,7 +148,6 @@ CONFIG_MMIO_NVRAM=y
#
CONFIG_SPU_FS=m
CONFIG_SPU_BASE=y
CONFIG_SPUFS_MMAP=y
CONFIG_CBE_RAS=y
#
@ -158,7 +163,7 @@ CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_BKL=y
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=m
CONFIG_FORCE_MAX_ZONEORDER=13
CONFIG_FORCE_MAX_ZONEORDER=9
# CONFIG_IOMMU_VMERGE is not set
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_KEXEC=y
@ -168,6 +173,7 @@ CONFIG_NUMA=y
CONFIG_NODES_SHIFT=4
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_POPULATES_NODE_MAP=y
CONFIG_SELECT_MEMORY_MODEL=y
# CONFIG_FLATMEM_MANUAL is not set
# CONFIG_DISCONTIGMEM_MANUAL is not set
@ -178,12 +184,12 @@ CONFIG_HAVE_MEMORY_PRESENT=y
# CONFIG_SPARSEMEM_STATIC is not set
CONFIG_SPARSEMEM_EXTREME=y
CONFIG_MEMORY_HOTPLUG=y
CONFIG_MEMORY_HOTPLUG_SPARSE=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_MIGRATION=y
CONFIG_RESOURCES_64BIT=y
CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID=y
CONFIG_ARCH_MEMORY_PROBE=y
# CONFIG_PPC_64K_PAGES is not set
CONFIG_PPC_64K_PAGES=y
CONFIG_SCHED_SMT=y
CONFIG_PROC_DEVICETREE=y
# CONFIG_CMDLINE_BOOL is not set
@ -201,6 +207,7 @@ CONFIG_GENERIC_ISA_DMA=y
CONFIG_PCI=y
CONFIG_PCI_DOMAINS=y
CONFIG_PCIEPORTBUS=y
# CONFIG_PCI_MULTITHREAD_PROBE is not set
# CONFIG_PCI_DEBUG is not set
#
@ -228,6 +235,7 @@ CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_NET_KEY is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
@ -249,7 +257,8 @@ CONFIG_INET_XFRM_MODE_TUNNEL=y
CONFIG_INET_DIAG=y
CONFIG_INET_TCP_DIAG=y
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_BIC=y
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
#
# IP: Virtual Server Configuration
@ -261,11 +270,15 @@ CONFIG_IPV6=y
CONFIG_INET6_AH=m
CONFIG_INET6_ESP=m
CONFIG_INET6_IPCOMP=m
# CONFIG_IPV6_MIP6 is not set
CONFIG_INET6_XFRM_TUNNEL=m
CONFIG_INET6_TUNNEL=m
CONFIG_INET6_XFRM_MODE_TRANSPORT=y
CONFIG_INET6_XFRM_MODE_TUNNEL=y
# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
CONFIG_IPV6_TUNNEL=m
# CONFIG_IPV6_SUBTREES is not set
# CONFIG_IPV6_MULTIPLE_TABLES is not set
# CONFIG_NETWORK_SECMARK is not set
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
@ -322,7 +335,6 @@ CONFIG_IP_NF_QUEUE=m
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_NET_DIVERT is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
@ -434,6 +446,7 @@ CONFIG_BLK_DEV_AEC62XX=y
# CONFIG_BLK_DEV_CS5530 is not set
# CONFIG_BLK_DEV_HPT34X is not set
# CONFIG_BLK_DEV_HPT366 is not set
# CONFIG_BLK_DEV_JMICRON is not set
# CONFIG_BLK_DEV_SC1200 is not set
# CONFIG_BLK_DEV_PIIX is not set
# CONFIG_BLK_DEV_IT821X is not set
@ -456,6 +469,12 @@ CONFIG_IDEDMA_AUTO=y
#
# CONFIG_RAID_ATTRS is not set
# CONFIG_SCSI is not set
# CONFIG_SCSI_NETLINK is not set
#
# Serial ATA (prod) and Parallel ATA (experimental) drivers
#
# CONFIG_ATA is not set
#
# Multi-device support (RAID and LVM)
@ -470,6 +489,7 @@ CONFIG_MD_RAID1=m
# CONFIG_MD_MULTIPATH is not set
# CONFIG_MD_FAULTY is not set
CONFIG_BLK_DEV_DM=m
# CONFIG_DM_DEBUG is not set
CONFIG_DM_CRYPT=m
CONFIG_DM_SNAPSHOT=m
CONFIG_DM_MIRROR=m
@ -504,7 +524,7 @@ CONFIG_NETDEVICES=y
# CONFIG_DUMMY is not set
CONFIG_BONDING=y
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set
CONFIG_TUN=y
#
# ARCnet devices
@ -552,7 +572,7 @@ CONFIG_SKGE=m
# CONFIG_TIGON3 is not set
# CONFIG_BNX2 is not set
CONFIG_SPIDER_NET=m
# CONFIG_MV643XX_ETH is not set
# CONFIG_QLA3XXX is not set
#
# Ethernet (10000 Mbit)
@ -599,6 +619,7 @@ CONFIG_SPIDER_NET=m
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
#
# Userland interfaces
@ -865,6 +886,7 @@ CONFIG_INFINIBAND_USER_ACCESS=m
CONFIG_INFINIBAND_ADDR_TRANS=y
CONFIG_INFINIBAND_MTHCA=m
CONFIG_INFINIBAND_MTHCA_DEBUG=y
# CONFIG_INFINIBAND_AMSO1100 is not set
CONFIG_INFINIBAND_IPOIB=m
CONFIG_INFINIBAND_IPOIB_DEBUG=y
CONFIG_INFINIBAND_IPOIB_DEBUG_DATA=y
@ -916,7 +938,7 @@ CONFIG_INOTIFY_USER=y
# CONFIG_QUOTA is not set
CONFIG_DNOTIFY=y
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
CONFIG_AUTOFS4_FS=m
# CONFIG_FUSE_FS is not set
#
@ -943,8 +965,10 @@ CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_RAMFS=y
@ -1084,6 +1108,7 @@ CONFIG_PLIST=y
# Kernel hacking
#
# CONFIG_PRINTK_TIME is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_MAGIC_SYSRQ=y
# CONFIG_UNUSED_SYMBOLS is not set
CONFIG_DEBUG_KERNEL=y
@ -1102,6 +1127,7 @@ CONFIG_DEBUG_SPINLOCK_SLEEP=y
# CONFIG_DEBUG_INFO is not set
CONFIG_DEBUG_FS=y
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_LIST is not set
# CONFIG_FORCED_INLINING is not set
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_DEBUG_STACKOVERFLOW is not set
@ -1123,6 +1149,10 @@ CONFIG_IRQSTACKS=y
# Cryptographic options
#
CONFIG_CRYPTO=y
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_BLKCIPHER=m
CONFIG_CRYPTO_HASH=y
# CONFIG_CRYPTO_MANAGER is not set
CONFIG_CRYPTO_HMAC=y
# CONFIG_CRYPTO_NULL is not set
# CONFIG_CRYPTO_MD4 is not set
@ -1132,6 +1162,8 @@ CONFIG_CRYPTO_SHA1=m
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_WP512 is not set
# CONFIG_CRYPTO_TGR192 is not set
CONFIG_CRYPTO_ECB=m
CONFIG_CRYPTO_CBC=m
CONFIG_CRYPTO_DES=m
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_TWOFISH is not set

5
arch/powerpc/platforms/cell/Kconfig
View File

@ -16,11 +16,6 @@ config SPU_BASE
bool
default n
config SPUFS_MMAP
bool
depends on SPU_FS && SPARSEMEM
default y
config CBE_RAS
bool "RAS features for bare metal Cell BE"
default y

10
arch/powerpc/platforms/cell/interrupt.c
View File

@ -101,7 +101,7 @@ static void iic_ioexc_eoi(unsigned int irq)
static void iic_ioexc_cascade(unsigned int irq, struct irq_desc *desc,
struct pt_regs *regs)
{
struct cbe_iic_regs *node_iic = desc->handler_data;
struct cbe_iic_regs __iomem *node_iic = (void __iomem *)desc->handler_data;
unsigned int base = (irq & 0xffffff00) | IIC_IRQ_TYPE_IOEXC;
unsigned long bits, ack;
int cascade;
@ -320,7 +320,7 @@ static int __init setup_iic(void)
struct device_node *dn;
struct resource r0, r1;
unsigned int node, cascade, found = 0;
struct cbe_iic_regs *node_iic;
struct cbe_iic_regs __iomem *node_iic;
const u32 *np;
for (dn = NULL;
@ -357,7 +357,11 @@ static int __init setup_iic(void)
cascade = irq_create_mapping(iic_host, cascade);
if (cascade == NO_IRQ)
continue;
set_irq_data(cascade, node_iic);
/*
* irq_data is a generic pointer that gets passed back
* to us later, so the forced cast is fine.
*/
set_irq_data(cascade, (void __force *)node_iic);
set_irq_chained_handler(cascade , iic_ioexc_cascade);
out_be64(&node_iic->iic_ir,
(1 << 12) /* priority */ |

8
arch/powerpc/platforms/cell/iommu.c
View File

@ -345,8 +345,8 @@ static int cell_map_iommu_hardcoded(int num_nodes)
/* node 0 */
iommu = &cell_iommus[0];
iommu->mapped_base = ioremap(0x20000511000, 0x1000);
iommu->mapped_mmio_base = ioremap(0x20000510000, 0x1000);
iommu->mapped_base = ioremap(0x20000511000ul, 0x1000);
iommu->mapped_mmio_base = ioremap(0x20000510000ul, 0x1000);
enable_mapping(iommu->mapped_base, iommu->mapped_mmio_base);
@ -358,8 +358,8 @@ static int cell_map_iommu_hardcoded(int num_nodes)
/* node 1 */
iommu = &cell_iommus[1];
iommu->mapped_base = ioremap(0x30000511000, 0x1000);
iommu->mapped_mmio_base = ioremap(0x30000510000, 0x1000);
iommu->mapped_base = ioremap(0x30000511000ul, 0x1000);
iommu->mapped_mmio_base = ioremap(0x30000510000ul, 0x1000);
enable_mapping(iommu->mapped_base, iommu->mapped_mmio_base);

6
arch/powerpc/platforms/cell/spider-pic.c
View File

@ -244,7 +244,6 @@ static unsigned int __init spider_find_cascade_and_node(struct spider_pic *pic)
int imaplen, intsize, unit;
struct device_node *iic;
#if 0 /* Enable that when we have a way to retreive the node as well */
/* First, we check wether we have a real "interrupts" in the device
* tree in case the device-tree is ever fixed
*/
@ -252,9 +251,8 @@ static unsigned int __init spider_find_cascade_and_node(struct spider_pic *pic)
if (of_irq_map_one(pic->of_node, 0, &oirq) == 0) {
virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
oirq.size);
goto bail;
return virq;
}
#endif
/* Now do the horrible hacks */
tmp = get_property(pic->of_node, "#interrupt-cells", NULL);
@ -369,7 +367,7 @@ void __init spider_init_IRQ(void)
} else if (device_is_compatible(dn, "sti,platform-spider-pic")
&& (chip < 2)) {
static long hard_coded_pics[] =
{ 0x24000008000, 0x34000008000 };
{ 0x24000008000ul, 0x34000008000ul};
r.start = hard_coded_pics[chip];
} else
continue;

164
arch/powerpc/platforms/cell/spu_base.c
View File

@ -25,11 +25,13 @@
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/poll.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/wait.h>
#include <asm/firmware.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <linux/mutex.h>
@ -46,21 +48,21 @@ EXPORT_SYMBOL_GPL(spu_priv1_ops);
static int __spu_trap_invalid_dma(struct spu *spu)
{
pr_debug("%s\n", __FUNCTION__);
force_sig(SIGBUS, /* info, */ current);
spu->dma_callback(spu, SPE_EVENT_INVALID_DMA);
return 0;
}
static int __spu_trap_dma_align(struct spu *spu)
{
pr_debug("%s\n", __FUNCTION__);
force_sig(SIGBUS, /* info, */ current);
spu->dma_callback(spu, SPE_EVENT_DMA_ALIGNMENT);
return 0;
}
static int __spu_trap_error(struct spu *spu)
{
pr_debug("%s\n", __FUNCTION__);
force_sig(SIGILL, /* info, */ current);
spu->dma_callback(spu, SPE_EVENT_SPE_ERROR);
return 0;
}
@ -317,7 +319,7 @@ static void spu_free_irqs(struct spu *spu)
free_irq(spu->irqs[2], spu);
}
static LIST_HEAD(spu_list);
static struct list_head spu_list[MAX_NUMNODES];
static DEFINE_MUTEX(spu_mutex);
static void spu_init_channels(struct spu *spu)
@ -354,32 +356,42 @@ static void spu_init_channels(struct spu *spu)
}
}
struct spu *spu_alloc(void)
struct spu *spu_alloc_node(int node)
{
struct spu *spu;
struct spu *spu = NULL;
mutex_lock(&spu_mutex);
if (!list_empty(&spu_list)) {
spu = list_entry(spu_list.next, struct spu, list);
if (!list_empty(&spu_list[node])) {
spu = list_entry(spu_list[node].next, struct spu, list);
list_del_init(&spu->list);
pr_debug("Got SPU %x %d\n", spu->isrc, spu->number);
} else {
pr_debug("No SPU left\n");
spu = NULL;
pr_debug("Got SPU %x %d %d\n",
spu->isrc, spu->number, spu->node);
spu_init_channels(spu);
}
mutex_unlock(&spu_mutex);
return spu;
}
EXPORT_SYMBOL_GPL(spu_alloc_node);
struct spu *spu_alloc(void)
{
struct spu *spu = NULL;
int node;
for (node = 0; node < MAX_NUMNODES; node++) {
spu = spu_alloc_node(node);
if (spu)
spu_init_channels(spu);
break;
}
return spu;
}
EXPORT_SYMBOL_GPL(spu_alloc);
void spu_free(struct spu *spu)
{
mutex_lock(&spu_mutex);
list_add_tail(&spu->list, &spu_list);
list_add_tail(&spu->list, &spu_list[spu->node]);
mutex_unlock(&spu_mutex);
}
EXPORT_SYMBOL_GPL(spu_free);
@ -566,7 +578,7 @@ static void spu_unmap(struct spu *spu)
}
/* This function shall be abstracted for HV platforms */
static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
static int __init spu_map_interrupts_old(struct spu *spu, struct device_node *np)
{
unsigned int isrc;
const u32 *tmp;
@ -590,7 +602,7 @@ static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
return spu->irqs[2] == NO_IRQ ? -EINVAL : 0;
}
static int __init spu_map_device(struct spu *spu, struct device_node *node)
static int __init spu_map_device_old(struct spu *spu, struct device_node *node)
{
const char *prop;
int ret;
@ -635,6 +647,88 @@ 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)
goto err;
ret = -EINVAL;
spu->irqs[i] = irq_create_of_mapping(oirq.controller,
oirq.specifier, oirq.size);
if (spu->irqs[i] == NO_IRQ)
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, 0, &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)
goto out;
ret = spu_map_resource(node, 1, (void __iomem**)&spu->problem,
&spu->problem_phys);
if (ret)
goto out_unmap;
ret = spu_map_resource(node, 2, (void __iomem**)&spu->priv2,
NULL);
if (ret)
goto out_unmap;
if (!firmware_has_feature(FW_FEATURE_LPAR))
ret = spu_map_resource(node, 3, (void __iomem**)&spu->priv1,
NULL);
if (ret)
goto out_unmap;
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")
};
@ -688,6 +782,9 @@ static int __init create_spu(struct device_node *spe)
goto out;
ret = spu_map_device(spu, spe);
/* try old method */
if (ret)
ret = spu_map_device_old(spu, spe);
if (ret)
goto out_free;
@ -696,6 +793,8 @@ static int __init create_spu(struct device_node *spe)
if (spu->nid == -1)
spu->nid = 0;
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);
@ -706,13 +805,13 @@ static int __init create_spu(struct device_node *spe)
spu->number = number++;
ret = spu_request_irqs(spu);
if (ret)
goto out_unmap;
goto out_unlock;
ret = spu_create_sysdev(spu);
if (ret)
goto out_free_irqs;
list_add(&spu->list, &spu_list);
list_add(&spu->list, &spu_list[spu->node]);
mutex_unlock(&spu_mutex);
pr_debug(KERN_DEBUG "Using SPE %s %02x %p %p %p %p %d\n",
@ -722,9 +821,9 @@ static int __init create_spu(struct device_node *spe)
out_free_irqs:
spu_free_irqs(spu);
out_unmap:
out_unlock:
mutex_unlock(&spu_mutex);
out_unmap:
spu_unmap(spu);
out_free:
kfree(spu);
@ -745,9 +844,13 @@ static void destroy_spu(struct spu *spu)
static void cleanup_spu_base(void)
{
struct spu *spu, *tmp;
int node;
mutex_lock(&spu_mutex);
list_for_each_entry_safe(spu, tmp, &spu_list, list)
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);
}
@ -756,13 +859,16 @@ module_exit(cleanup_spu_base);
static int __init init_spu_base(void)
{
struct device_node *node;
int ret;
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")) {
@ -774,18 +880,6 @@ static int __init init_spu_base(void)
break;
}
}
/* in some old firmware versions, the spe is called 'spc', so we
look for that as well */
for (node = of_find_node_by_type(NULL, "spc");
node; node = of_find_node_by_type(node, "spc")) {
ret = create_spu(node);
if (ret) {
printk(KERN_WARNING "%s: Error initializing %s\n",
__FUNCTION__, node->name);
cleanup_spu_base();
break;
}
}
return ret;
}
module_init(init_spu_base);

2
arch/powerpc/platforms/cell/spufs/Makefile
View File

@ -2,7 +2,7 @@ obj-y += switch.o
obj-$(CONFIG_SPU_FS) += spufs.o
spufs-y += inode.o file.o context.o syscalls.o
spufs-y += sched.o backing_ops.o hw_ops.o run.o
spufs-y += sched.o backing_ops.o hw_ops.o run.o gang.o
# Rules to build switch.o with the help of SPU tool chain
SPU_CROSS := spu-

6
arch/powerpc/platforms/cell/spufs/context.c
View File

@ -27,7 +27,7 @@
#include <asm/spu_csa.h>
#include "spufs.h"
struct spu_context *alloc_spu_context(void)
struct spu_context *alloc_spu_context(struct spu_gang *gang)
{
struct spu_context *ctx;
ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
@ -51,6 +51,8 @@ struct spu_context *alloc_spu_context(void)
ctx->state = SPU_STATE_SAVED;
ctx->ops = &spu_backing_ops;
ctx->owner = get_task_mm(current);
if (gang)
spu_gang_add_ctx(gang, ctx);
goto out;
out_free:
kfree(ctx);
@ -67,6 +69,8 @@ void destroy_spu_context(struct kref *kref)
spu_deactivate(ctx);
up_write(&ctx->state_sema);
spu_fini_csa(&ctx->csa);
if (ctx->gang)
spu_gang_remove_ctx(ctx->gang, ctx);
kfree(ctx);
}

360
arch/powerpc/platforms/cell/spufs/file.c
View File

@ -36,6 +36,8 @@
#include "spufs.h"
#define SPUFS_MMAP_4K (PAGE_SIZE == 0x1000)
static int
spufs_mem_open(struct inode *inode, struct file *file)
@ -88,7 +90,6 @@ spufs_mem_write(struct file *file, const char __user *buffer,
return ret;
}
#ifdef CONFIG_SPUFS_MMAP
static struct page *
spufs_mem_mmap_nopage(struct vm_area_struct *vma,
unsigned long address, int *type)
@ -101,12 +102,16 @@ spufs_mem_mmap_nopage(struct vm_area_struct *vma,
spu_acquire(ctx);
if (ctx->state == SPU_STATE_SAVED)
if (ctx->state == SPU_STATE_SAVED) {
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
& ~(_PAGE_NO_CACHE | _PAGE_GUARDED));
page = vmalloc_to_page(ctx->csa.lscsa->ls + offset);
else
} else {
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
| _PAGE_NO_CACHE | _PAGE_GUARDED);
page = pfn_to_page((ctx->spu->local_store_phys + offset)
>> PAGE_SHIFT);
}
spu_release(ctx);
if (type)
@ -133,22 +138,19 @@ spufs_mem_mmap(struct file *file, struct vm_area_struct *vma)
vma->vm_ops = &spufs_mem_mmap_vmops;
return 0;
}
#endif
static struct file_operations spufs_mem_fops = {
.open = spufs_mem_open,
.read = spufs_mem_read,
.write = spufs_mem_write,
.llseek = generic_file_llseek,
#ifdef CONFIG_SPUFS_MMAP
.mmap = spufs_mem_mmap,
#endif
};
#ifdef CONFIG_SPUFS_MMAP
static struct page *spufs_ps_nopage(struct vm_area_struct *vma,
unsigned long address,
int *type, unsigned long ps_offs)
int *type, unsigned long ps_offs,
unsigned long ps_size)
{
struct page *page = NOPAGE_SIGBUS;
int fault_type = VM_FAULT_SIGBUS;
@ -158,7 +160,7 @@ static struct page *spufs_ps_nopage(struct vm_area_struct *vma,
int ret;
offset += vma->vm_pgoff << PAGE_SHIFT;
if (offset >= 0x4000)
if (offset >= ps_size)
goto out;
ret = spu_acquire_runnable(ctx);
@ -179,10 +181,11 @@ static struct page *spufs_ps_nopage(struct vm_area_struct *vma,
return page;
}
#if SPUFS_MMAP_4K
static struct page *spufs_cntl_mmap_nopage(struct vm_area_struct *vma,
unsigned long address, int *type)
{
return spufs_ps_nopage(vma, address, type, 0x4000);
return spufs_ps_nopage(vma, address, type, 0x4000, 0x1000);
}
static struct vm_operations_struct spufs_cntl_mmap_vmops = {
@ -191,17 +194,12 @@ static struct vm_operations_struct spufs_cntl_mmap_vmops = {
/*
* mmap support for problem state control area [0x4000 - 0x4fff].
* Mapping this area requires that the application have CAP_SYS_RAWIO,
* as these registers require special care when read/writing.
*/
static int spufs_cntl_mmap(struct file *file, struct vm_area_struct *vma)
{
if (!(vma->vm_flags & VM_SHARED))
return -EINVAL;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
vma->vm_flags |= VM_RESERVED;
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
| _PAGE_NO_CACHE | _PAGE_GUARDED);
@ -209,7 +207,30 @@ static int spufs_cntl_mmap(struct file *file, struct vm_area_struct *vma)
vma->vm_ops = &spufs_cntl_mmap_vmops;
return 0;
}
#endif
#else /* SPUFS_MMAP_4K */
#define spufs_cntl_mmap NULL
#endif /* !SPUFS_MMAP_4K */
static u64 spufs_cntl_get(void *data)
{
struct spu_context *ctx = data;
u64 val;
spu_acquire(ctx);
val = ctx->ops->status_read(ctx);
spu_release(ctx);
return val;
}
static void spufs_cntl_set(void *data, u64 val)
{
struct spu_context *ctx = data;
spu_acquire(ctx);
ctx->ops->runcntl_write(ctx, val);
spu_release(ctx);
}
static int spufs_cntl_open(struct inode *inode, struct file *file)
{
@ -219,32 +240,15 @@ static int spufs_cntl_open(struct inode *inode, struct file *file)
file->private_data = ctx;
file->f_mapping = inode->i_mapping;
ctx->cntl = inode->i_mapping;
return 0;
}
static ssize_t
spufs_cntl_read(struct file *file, char __user *buffer,
size_t size, loff_t *pos)
{
/* FIXME: read from spu status */
return -EINVAL;
}
static ssize_t
spufs_cntl_write(struct file *file, const char __user *buffer,
size_t size, loff_t *pos)
{
/* FIXME: write to runctl bit */
return -EINVAL;
return simple_attr_open(inode, file, spufs_cntl_get,
spufs_cntl_set, "0x%08lx");
}
static struct file_operations spufs_cntl_fops = {
.open = spufs_cntl_open,
.read = spufs_cntl_read,
.write = spufs_cntl_write,
#ifdef CONFIG_SPUFS_MMAP
.read = simple_attr_read,
.write = simple_attr_write,
.mmap = spufs_cntl_mmap,
#endif
};
static int
@ -356,27 +360,54 @@ static int spufs_pipe_open(struct inode *inode, struct file *file)
return nonseekable_open(inode, file);
}
/*
* Read as many bytes from the mailbox as possible, until
* one of the conditions becomes true:
*
* - no more data available in the mailbox
* - end of the user provided buffer
* - end of the mapped area
*/
static ssize_t spufs_mbox_read(struct file *file, char __user *buf,
size_t len, loff_t *pos)
{
struct spu_context *ctx = file->private_data;
u32 mbox_data;
int ret;
u32 mbox_data, __user *udata;
ssize_t count;
if (len < 4)
return -EINVAL;
spu_acquire(ctx);
ret = ctx->ops->mbox_read(ctx, &mbox_data);
spu_release(ctx);
if (!ret)
return -EAGAIN;
if (copy_to_user(buf, &mbox_data, sizeof mbox_data))
if (!access_ok(VERIFY_WRITE, buf, len))
return -EFAULT;
return 4;
udata = (void __user *)buf;
spu_acquire(ctx);
for (count = 0; count <= len; count += 4, udata++) {
int ret;
ret = ctx->ops->mbox_read(ctx, &mbox_data);
if (ret == 0)
break;
/*
* at the end of the mapped area, we can fault
* but still need to return the data we have
* read successfully so far.
*/
ret = __put_user(mbox_data, udata);
if (ret) {
if (!count)
count = -EFAULT;
break;
}
}
spu_release(ctx);
if (!count)
count = -EAGAIN;
return count;
}
static struct file_operations spufs_mbox_fops = {
@ -432,36 +463,70 @@ void spufs_ibox_callback(struct spu *spu)
kill_fasync(&ctx->ibox_fasync, SIGIO, POLLIN);
}
/*
* Read as many bytes from the interrupt mailbox as possible, until
* one of the conditions becomes true:
*
* - no more data available in the mailbox
* - end of the user provided buffer
* - end of the mapped area
*
* If the file is opened without O_NONBLOCK, we wait here until
* any data is available, but return when we have been able to
* read something.
*/
static ssize_t spufs_ibox_read(struct file *file, char __user *buf,
size_t len, loff_t *pos)
{
struct spu_context *ctx = file->private_data;
u32 ibox_data;
ssize_t ret;
u32 ibox_data, __user *udata;
ssize_t count;
if (len < 4)
return -EINVAL;
if (!access_ok(VERIFY_WRITE, buf, len))
return -EFAULT;
udata = (void __user *)buf;
spu_acquire(ctx);
ret = 0;
/* wait only for the first element */
count = 0;
if (file->f_flags & O_NONBLOCK) {
if (!spu_ibox_read(ctx, &ibox_data))
ret = -EAGAIN;
count = -EAGAIN;
} else {
ret = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data));
count = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data));
}
if (count)
goto out;
/* if we can't write at all, return -EFAULT */
count = __put_user(ibox_data, udata);
if (count)
goto out;
for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) {
int ret;
ret = ctx->ops->ibox_read(ctx, &ibox_data);
if (ret == 0)
break;
/*
* at the end of the mapped area, we can fault
* but still need to return the data we have
* read successfully so far.
*/
ret = __put_user(ibox_data, udata);
if (ret)
break;
}
out:
spu_release(ctx);
if (ret)
return ret;
ret = 4;
if (copy_to_user(buf, &ibox_data, sizeof ibox_data))
ret = -EFAULT;
return ret;
return count;
}
static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait)
@ -534,32 +599,67 @@ void spufs_wbox_callback(struct spu *spu)
kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT);
}
/*
* Write as many bytes to the interrupt mailbox as possible, until
* one of the conditions becomes true:
*
* - the mailbox is full
* - end of the user provided buffer
* - end of the mapped area
*
* If the file is opened without O_NONBLOCK, we wait here until
* space is availabyl, but return when we have been able to
* write something.
*/
static ssize_t spufs_wbox_write(struct file *file, const char __user *buf,
size_t len, loff_t *pos)
{
struct spu_context *ctx = file->private_data;
u32 wbox_data;
int ret;
u32 wbox_data, __user *udata;
ssize_t count;
if (len < 4)
return -EINVAL;
if (copy_from_user(&wbox_data, buf, sizeof wbox_data))
udata = (void __user *)buf;
if (!access_ok(VERIFY_READ, buf, len))
return -EFAULT;
if (__get_user(wbox_data, udata))
return -EFAULT;
spu_acquire(ctx);
ret = 0;
/*
* make sure we can at least write one element, by waiting
* in case of !O_NONBLOCK
*/
count = 0;
if (file->f_flags & O_NONBLOCK) {
if (!spu_wbox_write(ctx, wbox_data))
ret = -EAGAIN;
count = -EAGAIN;
} else {
ret = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data));
count = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data));
}
spu_release(ctx);
if (count)
goto out;
return ret ? ret : sizeof wbox_data;
/* write aѕ much as possible */
for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) {
int ret;
ret = __get_user(wbox_data, udata);
if (ret)
break;
ret = spu_wbox_write(ctx, wbox_data);
if (ret == 0)
break;
}
out:
spu_release(ctx);
return count;
}
static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait)
@ -657,11 +757,19 @@ static ssize_t spufs_signal1_write(struct file *file, const char __user *buf,
return 4;
}
#ifdef CONFIG_SPUFS_MMAP
static struct page *spufs_signal1_mmap_nopage(struct vm_area_struct *vma,
unsigned long address, int *type)
{
return spufs_ps_nopage(vma, address, type, 0x14000);
#if PAGE_SIZE == 0x1000
return spufs_ps_nopage(vma, address, type, 0x14000, 0x1000);
#elif PAGE_SIZE == 0x10000
/* For 64k pages, both signal1 and signal2 can be used to mmap the whole
* signal 1 and 2 area
*/
return spufs_ps_nopage(vma, address, type, 0x10000, 0x10000);
#else
#error unsupported page size
#endif
}
static struct vm_operations_struct spufs_signal1_mmap_vmops = {
@ -680,15 +788,12 @@ static int spufs_signal1_mmap(struct file *file, struct vm_area_struct *vma)
vma->vm_ops = &spufs_signal1_mmap_vmops;
return 0;
}
#endif
static struct file_operations spufs_signal1_fops = {
.open = spufs_signal1_open,
.read = spufs_signal1_read,
.write = spufs_signal1_write,
#ifdef CONFIG_SPUFS_MMAP
.mmap = spufs_signal1_mmap,
#endif
};
static int spufs_signal2_open(struct inode *inode, struct file *file)
@ -743,11 +848,20 @@ static ssize_t spufs_signal2_write(struct file *file, const char __user *buf,
return 4;
}
#ifdef CONFIG_SPUFS_MMAP
#if SPUFS_MMAP_4K
static struct page *spufs_signal2_mmap_nopage(struct vm_area_struct *vma,
unsigned long address, int *type)
{
return spufs_ps_nopage(vma, address, type, 0x1c000);
#if PAGE_SIZE == 0x1000
return spufs_ps_nopage(vma, address, type, 0x1c000, 0x1000);
#elif PAGE_SIZE == 0x10000
/* For 64k pages, both signal1 and signal2 can be used to mmap the whole
* signal 1 and 2 area
*/
return spufs_ps_nopage(vma, address, type, 0x10000, 0x10000);
#else
#error unsupported page size
#endif
}
static struct vm_operations_struct spufs_signal2_mmap_vmops = {
@ -767,15 +881,15 @@ static int spufs_signal2_mmap(struct file *file, struct vm_area_struct *vma)
vma->vm_ops = &spufs_signal2_mmap_vmops;
return 0;
}
#endif
#else /* SPUFS_MMAP_4K */
#define spufs_signal2_mmap NULL
#endif /* !SPUFS_MMAP_4K */
static struct file_operations spufs_signal2_fops = {
.open = spufs_signal2_open,
.read = spufs_signal2_read,
.write = spufs_signal2_write,
#ifdef CONFIG_SPUFS_MMAP
.mmap = spufs_signal2_mmap,
#endif
};
static void spufs_signal1_type_set(void *data, u64 val)
@ -824,11 +938,11 @@ static u64 spufs_signal2_type_get(void *data)
DEFINE_SIMPLE_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get,
spufs_signal2_type_set, "%llu");
#ifdef CONFIG_SPUFS_MMAP
#if SPUFS_MMAP_4K
static struct page *spufs_mss_mmap_nopage(struct vm_area_struct *vma,
unsigned long address, int *type)
{
return spufs_ps_nopage(vma, address, type, 0x0000);
return spufs_ps_nopage(vma, address, type, 0x0000, 0x1000);
}
static struct vm_operations_struct spufs_mss_mmap_vmops = {
@ -837,17 +951,12 @@ static struct vm_operations_struct spufs_mss_mmap_vmops = {
/*
* mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
* Mapping this area requires that the application have CAP_SYS_RAWIO,
* as these registers require special care when read/writing.
*/
static int spufs_mss_mmap(struct file *file, struct vm_area_struct *vma)
{
if (!(vma->vm_flags & VM_SHARED))
return -EINVAL;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
vma->vm_flags |= VM_RESERVED;
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
| _PAGE_NO_CACHE | _PAGE_GUARDED);
@ -855,7 +964,9 @@ static int spufs_mss_mmap(struct file *file, struct vm_area_struct *vma)
vma->vm_ops = &spufs_mss_mmap_vmops;
return 0;
}
#endif
#else /* SPUFS_MMAP_4K */
#define spufs_mss_mmap NULL
#endif /* !SPUFS_MMAP_4K */
static int spufs_mss_open(struct inode *inode, struct file *file)
{
@ -867,17 +978,54 @@ static int spufs_mss_open(struct inode *inode, struct file *file)
static struct file_operations spufs_mss_fops = {
.open = spufs_mss_open,
#ifdef CONFIG_SPUFS_MMAP
.mmap = spufs_mss_mmap,
#endif
};
static struct page *spufs_psmap_mmap_nopage(struct vm_area_struct *vma,
unsigned long address, int *type)
{
return spufs_ps_nopage(vma, address, type, 0x0000, 0x20000);
}
static struct vm_operations_struct spufs_psmap_mmap_vmops = {
.nopage = spufs_psmap_mmap_nopage,
};
/*
* mmap support for full problem state area [0x00000 - 0x1ffff].
*/
static int spufs_psmap_mmap(struct file *file, struct vm_area_struct *vma)
{
if (!(vma->vm_flags & VM_SHARED))
return -EINVAL;
vma->vm_flags |= VM_RESERVED;
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
| _PAGE_NO_CACHE | _PAGE_GUARDED);
vma->vm_ops = &spufs_psmap_mmap_vmops;
return 0;
}
static int spufs_psmap_open(struct inode *inode, struct file *file)
{
struct spufs_inode_info *i = SPUFS_I(inode);
file->private_data = i->i_ctx;
return nonseekable_open(inode, file);
}
static struct file_operations spufs_psmap_fops = {
.open = spufs_psmap_open,
.mmap = spufs_psmap_mmap,
};
#ifdef CONFIG_SPUFS_MMAP
#if SPUFS_MMAP_4K
static struct page *spufs_mfc_mmap_nopage(struct vm_area_struct *vma,
unsigned long address, int *type)
{
return spufs_ps_nopage(vma, address, type, 0x3000);
return spufs_ps_nopage(vma, address, type, 0x3000, 0x1000);
}
static struct vm_operations_struct spufs_mfc_mmap_vmops = {
@ -886,17 +1034,12 @@ static struct vm_operations_struct spufs_mfc_mmap_vmops = {
/*
* mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
* Mapping this area requires that the application have CAP_SYS_RAWIO,
* as these registers require special care when read/writing.
*/
static int spufs_mfc_mmap(struct file *file, struct vm_area_struct *vma)
{
if (!(vma->vm_flags & VM_SHARED))
return -EINVAL;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
vma->vm_flags |= VM_RESERVED;
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
| _PAGE_NO_CACHE | _PAGE_GUARDED);
@ -904,7 +1047,9 @@ static int spufs_mfc_mmap(struct file *file, struct vm_area_struct *vma)
vma->vm_ops = &spufs_mfc_mmap_vmops;
return 0;
}
#endif
#else /* SPUFS_MMAP_4K */
#define spufs_mfc_mmap NULL
#endif /* !SPUFS_MMAP_4K */
static int spufs_mfc_open(struct inode *inode, struct file *file)
{
@ -1194,9 +1339,7 @@ static struct file_operations spufs_mfc_fops = {
.flush = spufs_mfc_flush,
.fsync = spufs_mfc_fsync,
.fasync = spufs_mfc_fasync,
#ifdef CONFIG_SPUFS_MMAP
.mmap = spufs_mfc_mmap,
#endif
};
static void spufs_npc_set(void *data, u64 val)
@ -1344,6 +1487,21 @@ static u64 spufs_id_get(void *data)
}
DEFINE_SIMPLE_ATTRIBUTE(spufs_id_ops, spufs_id_get, NULL, "0x%llx\n")
static u64 spufs_object_id_get(void *data)
{
struct spu_context *ctx = data;
return ctx->object_id;
}
static void spufs_object_id_set(void *data, u64 id)
{
struct spu_context *ctx = data;
ctx->object_id = id;
}
DEFINE_SIMPLE_ATTRIBUTE(spufs_object_id_ops, spufs_object_id_get,
spufs_object_id_set, "0x%llx\n");
struct tree_descr spufs_dir_contents[] = {
{ "mem", &spufs_mem_fops, 0666, },
{ "regs", &spufs_regs_fops, 0666, },
@ -1367,6 +1525,8 @@ struct tree_descr spufs_dir_contents[] = {
{ "spu_tag_mask", &spufs_spu_tag_mask_ops, 0666, },
{ "event_mask", &spufs_event_mask_ops, 0666, },
{ "srr0", &spufs_srr0_ops, 0666, },
{ "psmap", &spufs_psmap_fops, 0666, },
{ "phys-id", &spufs_id_ops, 0666, },
{ "object-id", &spufs_object_id_ops, 0666, },
{},
};

81
arch/powerpc/platforms/cell/spufs/gang.c Normal file
View File

@ -0,0 +1,81 @@
/*
* SPU file system
*
* (C) Copyright IBM Deutschland Entwicklung GmbH 2005
*
* Author: Arnd Bergmann <arndb@de.ibm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/list.h>
#include <linux/slab.h>
#include "spufs.h"
struct spu_gang *alloc_spu_gang(void)
{
struct spu_gang *gang;
gang = kzalloc(sizeof *gang, GFP_KERNEL);
if (!gang)
goto out;
kref_init(&gang->kref);
mutex_init(&gang->mutex);
INIT_LIST_HEAD(&gang->list);
out:
return gang;
}
static void destroy_spu_gang(struct kref *kref)
{
struct spu_gang *gang;
gang = container_of(kref, struct spu_gang, kref);
WARN_ON(gang->contexts || !list_empty(&gang->list));
kfree(gang);
}
struct spu_gang *get_spu_gang(struct spu_gang *gang)
{
kref_get(&gang->kref);
return gang;
}
int put_spu_gang(struct spu_gang *gang)
{
return kref_put(&gang->kref, &destroy_spu_gang);
}
void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx)
{
mutex_lock(&gang->mutex);
ctx->gang = get_spu_gang(gang);
list_add(&ctx->gang_list, &gang->list);
gang->contexts++;
mutex_unlock(&gang->mutex);
}
void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx)
{
mutex_lock(&gang->mutex);
WARN_ON(ctx->gang != gang);
list_del_init(&ctx->gang_list);
gang->contexts--;
mutex_unlock(&gang->mutex);
put_spu_gang(gang);
}

232
arch/powerpc/platforms/cell/spufs/inode.c
View File

@ -50,6 +50,10 @@ spufs_alloc_inode(struct super_block *sb)
ei = kmem_cache_alloc(spufs_inode_cache, SLAB_KERNEL);
if (!ei)
return NULL;
ei->i_gang = NULL;
ei->i_ctx = NULL;
return &ei->vfs_inode;
}
@ -128,14 +132,19 @@ out:
static void
spufs_delete_inode(struct inode *inode)
{
if (SPUFS_I(inode)->i_ctx)
put_spu_context(SPUFS_I(inode)->i_ctx);
struct spufs_inode_info *ei = SPUFS_I(inode);
if (ei->i_ctx)
put_spu_context(ei->i_ctx);
if (ei->i_gang)
put_spu_gang(ei->i_gang);
clear_inode(inode);
}
static void spufs_prune_dir(struct dentry *dir)
{
struct dentry *dentry, *tmp;
mutex_lock(&dir->d_inode->i_mutex);
list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) {
spin_lock(&dcache_lock);
@ -156,13 +165,13 @@ static void spufs_prune_dir(struct dentry *dir)
mutex_unlock(&dir->d_inode->i_mutex);
}
/* Caller must hold root->i_mutex */
static int spufs_rmdir(struct inode *root, struct dentry *dir_dentry)
/* Caller must hold parent->i_mutex */
static int spufs_rmdir(struct inode *parent, struct dentry *dir)
{
/* remove all entries */
spufs_prune_dir(dir_dentry);
spufs_prune_dir(dir);
return simple_rmdir(root, dir_dentry);
return simple_rmdir(parent, dir);
}
static int spufs_fill_dir(struct dentry *dir, struct tree_descr *files,
@ -191,17 +200,17 @@ out:
static int spufs_dir_close(struct inode *inode, struct file *file)
{
struct spu_context *ctx;
struct inode *dir;
struct dentry *dentry;
struct inode *parent;
struct dentry *dir;
int ret;
dentry = file->f_dentry;
dir = dentry->d_parent->d_inode;
ctx = SPUFS_I(dentry->d_inode)->i_ctx;
dir = file->f_dentry;
parent = dir->d_parent->d_inode;
ctx = SPUFS_I(dir->d_inode)->i_ctx;
mutex_lock(&dir->i_mutex);
ret = spufs_rmdir(dir, dentry);
mutex_unlock(&dir->i_mutex);
mutex_lock(&parent->i_mutex);
ret = spufs_rmdir(parent, dir);
mutex_unlock(&parent->i_mutex);
WARN_ON(ret);
/* We have to give up the mm_struct */
@ -224,7 +233,8 @@ struct file_operations spufs_context_fops = {
};
static int
spufs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags,
int mode)
{
int ret;
struct inode *inode;
@ -239,11 +249,13 @@ spufs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
inode->i_gid = dir->i_gid;
inode->i_mode &= S_ISGID;
}
ctx = alloc_spu_context();
ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */
SPUFS_I(inode)->i_ctx = ctx;
if (!ctx)
goto out_iput;
ctx->flags = flags;
inode->i_op = &spufs_dir_inode_operations;
inode->i_fop = &simple_dir_operations;
ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx);
@ -289,24 +301,177 @@ out:
return ret;
}
static int spufs_create_context(struct inode *inode,
struct dentry *dentry,
struct vfsmount *mnt, int flags, int mode)
{
int ret;
ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO);
if (ret)
goto out_unlock;
/*
* get references for dget and mntget, will be released
* in error path of *_open().
*/
ret = spufs_context_open(dget(dentry), mntget(mnt));
if (ret < 0) {
WARN_ON(spufs_rmdir(inode, dentry));
mutex_unlock(&inode->i_mutex);
spu_forget(SPUFS_I(dentry->d_inode)->i_ctx);
goto out;
}
out_unlock:
mutex_unlock(&inode->i_mutex);
out:
dput(dentry);
return ret;
}
static int spufs_rmgang(struct inode *root, struct dentry *dir)
{
/* FIXME: this fails if the dir is not empty,
which causes a leak of gangs. */
return simple_rmdir(root, dir);
}
static int spufs_gang_close(struct inode *inode, struct file *file)
{
struct inode *parent;
struct dentry *dir;
int ret;
dir = file->f_dentry;
parent = dir->d_parent->d_inode;
ret = spufs_rmgang(parent, dir);
WARN_ON(ret);
return dcache_dir_close(inode, file);
}
struct file_operations spufs_gang_fops = {
.open = dcache_dir_open,
.release = spufs_gang_close,
.llseek = dcache_dir_lseek,
.read = generic_read_dir,
.readdir = dcache_readdir,
.fsync = simple_sync_file,
};
static int
spufs_mkgang(struct inode *dir, struct dentry *dentry, int mode)
{
int ret;
struct inode *inode;
struct spu_gang *gang;
ret = -ENOSPC;
inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR);
if (!inode)
goto out;
ret = 0;
if (dir->i_mode & S_ISGID) {
inode->i_gid = dir->i_gid;
inode->i_mode &= S_ISGID;
}
gang = alloc_spu_gang();
SPUFS_I(inode)->i_ctx = NULL;
SPUFS_I(inode)->i_gang = gang;
if (!gang)
goto out_iput;
inode->i_op = &spufs_dir_inode_operations;
inode->i_fop = &simple_dir_operations;
d_instantiate(dentry, inode);
dget(dentry);
dir->i_nlink++;
dentry->d_inode->i_nlink++;
return ret;
out_iput:
iput(inode);
out:
return ret;
}
static int spufs_gang_open(struct dentry *dentry, struct vfsmount *mnt)
{
int ret;
struct file *filp;
ret = get_unused_fd();
if (ret < 0) {
dput(dentry);
mntput(mnt);
goto out;
}
filp = dentry_open(dentry, mnt, O_RDONLY);
if (IS_ERR(filp)) {
put_unused_fd(ret);
ret = PTR_ERR(filp);
goto out;
}
filp->f_op = &spufs_gang_fops;
fd_install(ret, filp);
out:
return ret;
}
static int spufs_create_gang(struct inode *inode,
struct dentry *dentry,
struct vfsmount *mnt, int mode)
{
int ret;
ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO);
if (ret)
goto out;
/*
* get references for dget and mntget, will be released
* in error path of *_open().
*/
ret = spufs_gang_open(dget(dentry), mntget(mnt));
if (ret < 0)
WARN_ON(spufs_rmgang(inode, dentry));
out:
mutex_unlock(&inode->i_mutex);
dput(dentry);
return ret;
}
static struct file_system_type spufs_type;
long spufs_create_thread(struct nameidata *nd,
unsigned int flags, mode_t mode)
long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode)
{
struct dentry *dentry;
int ret;
/* need to be at the root of spufs */
ret = -EINVAL;
if (nd->dentry->d_sb->s_type != &spufs_type ||
nd->dentry != nd->dentry->d_sb->s_root)
/* check if we are on spufs */
if (nd->dentry->d_sb->s_type != &spufs_type)
goto out;
/* all flags are reserved */
if (flags)
/* don't accept undefined flags */
if (flags & (~SPU_CREATE_FLAG_ALL))
goto out;
/* only threads can be underneath a gang */
if (nd->dentry != nd->dentry->d_sb->s_root) {
if ((flags & SPU_CREATE_GANG) ||
!SPUFS_I(nd->dentry->d_inode)->i_gang)
goto out;
}
dentry = lookup_create(nd, 1);
ret = PTR_ERR(dentry);
if (IS_ERR(dentry))
@ -317,22 +482,13 @@ long spufs_create_thread(struct nameidata *nd,
goto out_dput;
mode &= ~current->fs->umask;
ret = spufs_mkdir(nd->dentry->d_inode, dentry, mode & S_IRWXUGO);
if (ret)
goto out_dput;
/*
* get references for dget and mntget, will be released
* in error path of *_open().
*/
ret = spufs_context_open(dget(dentry), mntget(nd->mnt));
if (ret < 0) {
WARN_ON(spufs_rmdir(nd->dentry->d_inode, dentry));
mutex_unlock(&nd->dentry->d_inode->i_mutex);
spu_forget(SPUFS_I(dentry->d_inode)->i_ctx);
dput(dentry);
goto out;
}
if (flags & SPU_CREATE_GANG)
return spufs_create_gang(nd->dentry->d_inode,
dentry, nd->mnt, mode);
else
return spufs_create_context(nd->dentry->d_inode,
dentry, nd->mnt, flags, mode);
out_dput:
dput(dentry);

48
arch/powerpc/platforms/cell/spufs/run.c
View File

@ -14,6 +14,26 @@ void spufs_stop_callback(struct spu *spu)
wake_up_all(&ctx->stop_wq);
}
void spufs_dma_callback(struct spu *spu, int type)
{
struct spu_context *ctx = spu->ctx;
if (ctx->flags & SPU_CREATE_EVENTS_ENABLED) {
ctx->event_return |= type;
wake_up_all(&ctx->stop_wq);
} else {
switch (type) {
case SPE_EVENT_DMA_ALIGNMENT:
case SPE_EVENT_INVALID_DMA:
force_sig(SIGBUS, /* info, */ current);
break;
case SPE_EVENT_SPE_ERROR:
force_sig(SIGILL, /* info */ current);
break;
}
}
}
static inline int spu_stopped(struct spu_context *ctx, u32 * stat)
{
struct spu *spu;
@ -28,8 +48,7 @@ static inline int spu_stopped(struct spu_context *ctx, u32 * stat)
return (!(*stat & 0x1) || pte_fault || spu->class_0_pending) ? 1 : 0;
}
static inline int spu_run_init(struct spu_context *ctx, u32 * npc,
u32 * status)
static inline int spu_run_init(struct spu_context *ctx, u32 * npc)
{
int ret;
@ -72,7 +91,7 @@ static inline int spu_reacquire_runnable(struct spu_context *ctx, u32 *npc,
SPU_STATUS_STOPPED_BY_HALT)) {
return *status;
}
if ((ret = spu_run_init(ctx, npc, status)) != 0)
if ((ret = spu_run_init(ctx, npc)) != 0)
return ret;
return 0;
}
@ -177,46 +196,49 @@ static inline int spu_process_events(struct spu_context *ctx)
}
long spufs_run_spu(struct file *file, struct spu_context *ctx,
u32 * npc, u32 * status)
u32 *npc, u32 *event)
{
int ret;
u32 status;
if (down_interruptible(&ctx->run_sema))
return -ERESTARTSYS;
ret = spu_run_init(ctx, npc, status);
ctx->event_return = 0;
ret = spu_run_init(ctx, npc);
if (ret)
goto out;
do {
ret = spufs_wait(ctx->stop_wq, spu_stopped(ctx, status));
ret = spufs_wait(ctx->stop_wq, spu_stopped(ctx, &status));
if (unlikely(ret))
break;
if ((*status & SPU_STATUS_STOPPED_BY_STOP) &&
(*status >> SPU_STOP_STATUS_SHIFT == 0x2104)) {
if ((status & SPU_STATUS_STOPPED_BY_STOP) &&
(status >> SPU_STOP_STATUS_SHIFT == 0x2104)) {
ret = spu_process_callback(ctx);
if (ret)
break;
*status &= ~SPU_STATUS_STOPPED_BY_STOP;
status &= ~SPU_STATUS_STOPPED_BY_STOP;
}
if (unlikely(ctx->state != SPU_STATE_RUNNABLE)) {
ret = spu_reacquire_runnable(ctx, npc, status);
ret = spu_reacquire_runnable(ctx, npc, &status);
if (ret)
goto out;
continue;
}
ret = spu_process_events(ctx);
} while (!ret && !(*status & (SPU_STATUS_STOPPED_BY_STOP |
} while (!ret && !(status & (SPU_STATUS_STOPPED_BY_STOP |
SPU_STATUS_STOPPED_BY_HALT)));
ctx->ops->runcntl_stop(ctx);
ret = spu_run_fini(ctx, npc, status);
ret = spu_run_fini(ctx, npc, &status);
if (!ret)
ret = *status;
ret = status;
spu_yield(ctx);
out:
*event = ctx->event_return;
up(&ctx->run_sema);
return ret;
}

458
arch/powerpc/platforms/cell/spufs/sched.c
View File

@ -3,11 +3,7 @@
* Copyright (C) IBM 2005
* Author: Mark Nutter <mnutter@us.ibm.com>
*
* SPU scheduler, based on Linux thread priority. For now use
* a simple "cooperative" yield model with no preemption. SPU
* scheduling will eventually be preemptive: When a thread with
* a higher static priority gets ready to run, then an active SPU
* context will be preempted and returned to the waitq.
* 2006-03-31 NUMA domains added.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -37,6 +33,9 @@
#include <linux/smp_lock.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/numa.h>
#include <linux/mutex.h>
#include <linux/notifier.h>
#include <asm/io.h>
#include <asm/mmu_context.h>
@ -49,128 +48,59 @@
#define SPU_BITMAP_SIZE (((MAX_PRIO+BITS_PER_LONG)/BITS_PER_LONG)+1)
struct spu_prio_array {
atomic_t nr_blocked;
unsigned long bitmap[SPU_BITMAP_SIZE];
wait_queue_head_t waitq[MAX_PRIO];
struct list_head active_list[MAX_NUMNODES];
struct mutex active_mutex[MAX_NUMNODES];
};
/* spu_runqueue - This is the main runqueue data structure for SPUs. */
struct spu_runqueue {
struct semaphore sem;
unsigned long nr_active;
unsigned long nr_idle;
unsigned long nr_switches;
struct list_head active_list;
struct list_head idle_list;
struct spu_prio_array prio;
};
static struct spu_prio_array *spu_prio;
static struct spu_runqueue *spu_runqueues = NULL;
static inline struct spu_runqueue *spu_rq(void)
static inline int node_allowed(int node)
{
/* Future: make this a per-NODE array,
* and use cpu_to_node(smp_processor_id())
*/
return spu_runqueues;
}
cpumask_t mask;
static inline struct spu *del_idle(struct spu_runqueue *rq)
{
struct spu *spu;
BUG_ON(rq->nr_idle <= 0);
BUG_ON(list_empty(&rq->idle_list));
/* Future: Move SPU out of low-power SRI state. */
spu = list_entry(rq->idle_list.next, struct spu, sched_list);
list_del_init(&spu->sched_list);
rq->nr_idle--;
return spu;
}
static inline void del_active(struct spu_runqueue *rq, struct spu *spu)
{
BUG_ON(rq->nr_active <= 0);
BUG_ON(list_empty(&rq->active_list));
list_del_init(&spu->sched_list);
rq->nr_active--;
}
static inline void add_idle(struct spu_runqueue *rq, struct spu *spu)
{
/* Future: Put SPU into low-power SRI state. */
list_add_tail(&spu->sched_list, &rq->idle_list);
rq->nr_idle++;
}
static inline void add_active(struct spu_runqueue *rq, struct spu *spu)
{
rq->nr_active++;
rq->nr_switches++;
list_add_tail(&spu->sched_list, &rq->active_list);
}
static void prio_wakeup(struct spu_runqueue *rq)
{
if (atomic_read(&rq->prio.nr_blocked) && rq->nr_idle) {
int best = sched_find_first_bit(rq->prio.bitmap);
if (best < MAX_PRIO) {
wait_queue_head_t *wq = &rq->prio.waitq[best];
wake_up_interruptible_nr(wq, 1);
}
}
}
static void prio_wait(struct spu_runqueue *rq, struct spu_context *ctx,
u64 flags)
{
int prio = current->prio;
wait_queue_head_t *wq = &rq->prio.waitq[prio];
DEFINE_WAIT(wait);
__set_bit(prio, rq->prio.bitmap);
atomic_inc(&rq->prio.nr_blocked);
prepare_to_wait_exclusive(wq, &wait, TASK_INTERRUPTIBLE);
if (!signal_pending(current)) {
up(&rq->sem);
up_write(&ctx->state_sema);
pr_debug("%s: pid=%d prio=%d\n", __FUNCTION__,
current->pid, current->prio);
schedule();
down_write(&ctx->state_sema);
down(&rq->sem);
}
finish_wait(wq, &wait);
atomic_dec(&rq->prio.nr_blocked);
if (!waitqueue_active(wq))
__clear_bit(prio, rq->prio.bitmap);
}
static inline int is_best_prio(struct spu_runqueue *rq)
{
int best_prio;
best_prio = sched_find_first_bit(rq->prio.bitmap);
return (current->prio < best_prio) ? 1 : 0;
if (!nr_cpus_node(node))
return 0;
mask = node_to_cpumask(node);
if (!cpus_intersects(mask, current->cpus_allowed))
return 0;
return 1;
}
static inline void mm_needs_global_tlbie(struct mm_struct *mm)
{
int nr = (NR_CPUS > 1) ? NR_CPUS : NR_CPUS + 1;
/* Global TLBIE broadcast required with SPEs. */
#if (NR_CPUS > 1)
__cpus_setall(&mm->cpu_vm_mask, NR_CPUS);
#else
__cpus_setall(&mm->cpu_vm_mask, NR_CPUS+1); /* is this ok? */
#endif
__cpus_setall(&mm->cpu_vm_mask, nr);
}
static BLOCKING_NOTIFIER_HEAD(spu_switch_notifier);
static void spu_switch_notify(struct spu *spu, struct spu_context *ctx)
{
blocking_notifier_call_chain(&spu_switch_notifier,
ctx ? ctx->object_id : 0, spu);
}
int spu_switch_event_register(struct notifier_block * n)
{
return blocking_notifier_chain_register(&spu_switch_notifier, n);
}
int spu_switch_event_unregister(struct notifier_block * n)
{
return blocking_notifier_chain_unregister(&spu_switch_notifier, n);
}
static inline void bind_context(struct spu *spu, struct spu_context *ctx)
{
pr_debug("%s: pid=%d SPU=%d\n", __FUNCTION__, current->pid,
spu->number);
pr_debug("%s: pid=%d SPU=%d NODE=%d\n", __FUNCTION__, current->pid,
spu->number, spu->node);
spu->ctx = ctx;
spu->flags = 0;
ctx->flags = 0;
ctx->spu = spu;
ctx->ops = &spu_hw_ops;
spu->pid = current->pid;
@ -181,16 +111,20 @@ static inline void bind_context(struct spu *spu, struct spu_context *ctx)
spu->wbox_callback = spufs_wbox_callback;
spu->stop_callback = spufs_stop_callback;
spu->mfc_callback = spufs_mfc_callback;
spu->dma_callback = spufs_dma_callback;
mb();
spu_unmap_mappings(ctx);
spu_restore(&ctx->csa, spu);
spu->timestamp = jiffies;
spu_cpu_affinity_set(spu, raw_smp_processor_id());
spu_switch_notify(spu, ctx);
}
static inline void unbind_context(struct spu *spu, struct spu_context *ctx)
{
pr_debug("%s: unbind pid=%d SPU=%d\n", __FUNCTION__,
spu->pid, spu->number);
pr_debug("%s: unbind pid=%d SPU=%d NODE=%d\n", __FUNCTION__,
spu->pid, spu->number, spu->node);
spu_switch_notify(spu, NULL);
spu_unmap_mappings(ctx);
spu_save(&ctx->csa, spu);
spu->timestamp = jiffies;
@ -199,173 +133,158 @@ static inline void unbind_context(struct spu *spu, struct spu_context *ctx)
spu->wbox_callback = NULL;
spu->stop_callback = NULL;
spu->mfc_callback = NULL;
spu->dma_callback = NULL;
spu->mm = NULL;
spu->pid = 0;
spu->prio = MAX_PRIO;
ctx->ops = &spu_backing_ops;
ctx->spu = NULL;
ctx->flags = 0;
spu->flags = 0;
spu->ctx = NULL;
}
static void spu_reaper(void *data)
static inline void spu_add_wq(wait_queue_head_t * wq, wait_queue_t * wait,
int prio)
{
struct spu_context *ctx = data;
struct spu *spu;
prepare_to_wait_exclusive(wq, wait, TASK_INTERRUPTIBLE);
set_bit(prio, spu_prio->bitmap);
}
down_write(&ctx->state_sema);
spu = ctx->spu;
if (spu && test_bit(SPU_CONTEXT_PREEMPT, &ctx->flags)) {
if (atomic_read(&spu->rq->prio.nr_blocked)) {
pr_debug("%s: spu=%d\n", __func__, spu->number);
ctx->ops->runcntl_stop(ctx);
spu_deactivate(ctx);
wake_up_all(&ctx->stop_wq);
} else {
clear_bit(SPU_CONTEXT_PREEMPT, &ctx->flags);
}
static inline void spu_del_wq(wait_queue_head_t * wq, wait_queue_t * wait,
int prio)
{
u64 flags;
__set_current_state(TASK_RUNNING);
spin_lock_irqsave(&wq->lock, flags);
remove_wait_queue_locked(wq, wait);
if (list_empty(&wq->task_list))
clear_bit(prio, spu_prio->bitmap);
spin_unlock_irqrestore(&wq->lock, flags);
}
static void spu_prio_wait(struct spu_context *ctx, u64 flags)
{
int prio = current->prio;
wait_queue_head_t *wq = &spu_prio->waitq[prio];
DEFINE_WAIT(wait);
if (ctx->spu)
return;
spu_add_wq(wq, &wait, prio);
if (!signal_pending(current)) {
up_write(&ctx->state_sema);
put_spu_context(ctx);
pr_debug("%s: pid=%d prio=%d\n", __FUNCTION__,
current->pid, current->prio);
schedule();
down_write(&ctx->state_sema);
}
static void schedule_spu_reaper(struct spu_runqueue *rq, struct spu *spu)
spu_del_wq(wq, &wait, prio);
}
static void spu_prio_wakeup(void)
{
struct spu_context *ctx = get_spu_context(spu->ctx);
unsigned long now = jiffies;
unsigned long expire = spu->timestamp + SPU_MIN_TIMESLICE;
set_bit(SPU_CONTEXT_PREEMPT, &ctx->flags);
INIT_WORK(&ctx->reap_work, spu_reaper, ctx);
if (time_after(now, expire))
schedule_work(&ctx->reap_work);
else
schedule_delayed_work(&ctx->reap_work, expire - now);
int best = sched_find_first_bit(spu_prio->bitmap);
if (best < MAX_PRIO) {
wait_queue_head_t *wq = &spu_prio->waitq[best];
wake_up_interruptible_nr(wq, 1);
}
static void check_preempt_active(struct spu_runqueue *rq)
{
struct list_head *p;
struct spu *worst = NULL;
list_for_each(p, &rq->active_list) {
struct spu *spu = list_entry(p, struct spu, sched_list);
struct spu_context *ctx = spu->ctx;
if (!test_bit(SPU_CONTEXT_PREEMPT, &ctx->flags)) {
if (!worst || (spu->prio > worst->prio)) {
worst = spu;
}
}
}
if (worst && (current->prio < worst->prio))
schedule_spu_reaper(rq, worst);
}
static struct spu *get_idle_spu(struct spu_context *ctx, u64 flags)
{
struct spu_runqueue *rq;
struct spu *spu = NULL;
rq = spu_rq();
down(&rq->sem);
for (;;) {
if (rq->nr_idle > 0) {
if (is_best_prio(rq)) {
/* Fall through. */
spu = del_idle(rq);
break;
} else {
prio_wakeup(rq);
up(&rq->sem);
yield();
if (signal_pending(current)) {
return NULL;
}
rq = spu_rq();
down(&rq->sem);
continue;
}
} else {
check_preempt_active(rq);
prio_wait(rq, ctx, flags);
if (signal_pending(current)) {
prio_wakeup(rq);
spu = NULL;
break;
}
continue;
}
}
up(&rq->sem);
return spu;
}
static void put_idle_spu(struct spu *spu)
{
struct spu_runqueue *rq = spu->rq;
down(&rq->sem);
add_idle(rq, spu);
prio_wakeup(rq);
up(&rq->sem);
}
static int get_active_spu(struct spu *spu)
{
struct spu_runqueue *rq = spu->rq;
struct list_head *p;
int node = spu->node;
struct spu *tmp;
int rc = 0;
down(&rq->sem);
list_for_each(p, &rq->active_list) {
tmp = list_entry(p, struct spu, sched_list);
mutex_lock(&spu_prio->active_mutex[node]);
list_for_each_entry(tmp, &spu_prio->active_list[node], list) {
if (tmp == spu) {
del_active(rq, spu);
list_del_init(&spu->list);
rc = 1;
break;
}
}
up(&rq->sem);
mutex_unlock(&spu_prio->active_mutex[node]);
return rc;
}
static void put_active_spu(struct spu *spu)
{
struct spu_runqueue *rq = spu->rq;
int node = spu->node;
down(&rq->sem);
add_active(rq, spu);
up(&rq->sem);
mutex_lock(&spu_prio->active_mutex[node]);
list_add_tail(&spu->list, &spu_prio->active_list[node]);
mutex_unlock(&spu_prio->active_mutex[node]);
}
/* Lock order:
* spu_activate() & spu_deactivate() require the
* caller to have down_write(&ctx->state_sema).
static struct spu *spu_get_idle(struct spu_context *ctx, u64 flags)
{
struct spu *spu = NULL;
int node = cpu_to_node(raw_smp_processor_id());
int n;
for (n = 0; n < MAX_NUMNODES; n++, node++) {
node = (node < MAX_NUMNODES) ? node : 0;
if (!node_allowed(node))
continue;
spu = spu_alloc_node(node);
if (spu)
break;
}
return spu;
}
static inline struct spu *spu_get(struct spu_context *ctx, u64 flags)
{
/* Future: spu_get_idle() if possible,
* otherwise try to preempt an active
* context.
*/
return spu_get_idle(ctx, flags);
}
/* The three externally callable interfaces
* for the scheduler begin here.
*
* The rq->sem is breifly held (inside or outside a
* given ctx lock) for list management, but is never
* held during save/restore.
* spu_activate - bind a context to SPU, waiting as needed.
* spu_deactivate - unbind a context from its SPU.
* spu_yield - yield an SPU if others are waiting.
*/
int spu_activate(struct spu_context *ctx, u64 flags)
{
struct spu *spu;
int ret = 0;
for (;;) {
if (ctx->spu)
return 0;
spu = get_idle_spu(ctx, flags);
if (!spu)
return (signal_pending(current)) ? -ERESTARTSYS : -EAGAIN;
spu = spu_get(ctx, flags);
if (spu != NULL) {
if (ctx->spu != NULL) {
spu_free(spu);
spu_prio_wakeup();
break;
}
bind_context(spu, ctx);
/*
* We're likely to wait for interrupts on the same
* CPU that we are now on, so send them here.
*/
spu_cpu_affinity_set(spu, raw_smp_processor_id());
put_active_spu(spu);
return 0;
break;
}
spu_prio_wait(ctx, flags);
if (signal_pending(current)) {
ret = -ERESTARTSYS;
spu_prio_wakeup();
break;
}
}
return ret;
}
void spu_deactivate(struct spu_context *ctx)
@ -378,8 +297,10 @@ void spu_deactivate(struct spu_context *ctx)
return;
needs_idle = get_active_spu(spu);
unbind_context(spu, ctx);
if (needs_idle)
put_idle_spu(spu);
if (needs_idle) {
spu_free(spu);
spu_prio_wakeup();
}
}
void spu_yield(struct spu_context *ctx)
@ -387,77 +308,60 @@ void spu_yield(struct spu_context *ctx)
struct spu *spu;
int need_yield = 0;
down_write(&ctx->state_sema);
spu = ctx->spu;
if (spu && (sched_find_first_bit(spu->rq->prio.bitmap) < MAX_PRIO)) {
pr_debug("%s: yielding SPU %d\n", __FUNCTION__, spu->number);
if (down_write_trylock(&ctx->state_sema)) {
if ((spu = ctx->spu) != NULL) {
int best = sched_find_first_bit(spu_prio->bitmap);
if (best < MAX_PRIO) {
pr_debug("%s: yielding SPU %d NODE %d\n",
__FUNCTION__, spu->number, spu->node);
spu_deactivate(ctx);
ctx->state = SPU_STATE_SAVED;
need_yield = 1;
} else if (spu) {
} else {
spu->prio = MAX_PRIO;
}
}
up_write(&ctx->state_sema);
}
if (unlikely(need_yield))
yield();
}
int __init spu_sched_init(void)
{
struct spu_runqueue *rq;
struct spu *spu;
int i;
rq = spu_runqueues = kmalloc(sizeof(struct spu_runqueue), GFP_KERNEL);
if (!rq) {
printk(KERN_WARNING "%s: Unable to allocate runqueues.\n",
spu_prio = kzalloc(sizeof(struct spu_prio_array), GFP_KERNEL);
if (!spu_prio) {
printk(KERN_WARNING "%s: Unable to allocate priority queue.\n",
__FUNCTION__);
return 1;
}
memset(rq, 0, sizeof(struct spu_runqueue));
init_MUTEX(&rq->sem);
INIT_LIST_HEAD(&rq->active_list);
INIT_LIST_HEAD(&rq->idle_list);
rq->nr_active = 0;
rq->nr_idle = 0;
rq->nr_switches = 0;
atomic_set(&rq->prio.nr_blocked, 0);
for (i = 0; i < MAX_PRIO; i++) {
init_waitqueue_head(&rq->prio.waitq[i]);
__clear_bit(i, rq->prio.bitmap);
init_waitqueue_head(&spu_prio->waitq[i]);
__clear_bit(i, spu_prio->bitmap);
}
__set_bit(MAX_PRIO, rq->prio.bitmap);
for (;;) {
spu = spu_alloc();
if (!spu)
break;
pr_debug("%s: adding SPU[%d]\n", __FUNCTION__, spu->number);
add_idle(rq, spu);
spu->rq = rq;
spu->timestamp = jiffies;
}
if (!rq->nr_idle) {
printk(KERN_WARNING "%s: No available SPUs.\n", __FUNCTION__);
kfree(rq);
return 1;
__set_bit(MAX_PRIO, spu_prio->bitmap);
for (i = 0; i < MAX_NUMNODES; i++) {
mutex_init(&spu_prio->active_mutex[i]);
INIT_LIST_HEAD(&spu_prio->active_list[i]);
}
return 0;
}
void __exit spu_sched_exit(void)
{
struct spu_runqueue *rq = spu_rq();
struct spu *spu;
struct spu *spu, *tmp;
int node;
if (!rq) {
printk(KERN_WARNING "%s: no runqueues!\n", __FUNCTION__);
return;
}
while (rq->nr_idle > 0) {
spu = del_idle(rq);
if (!spu)
break;
for (node = 0; node < MAX_NUMNODES; node++) {
mutex_lock(&spu_prio->active_mutex[node]);
list_for_each_entry_safe(spu, tmp, &spu_prio->active_list[node],
list) {
list_del_init(&spu->list);
spu_free(spu);
}
kfree(rq);
mutex_unlock(&spu_prio->active_mutex[node]);
}
kfree(spu_prio);
}

29
arch/powerpc/platforms/cell/spufs/spufs.h
View File

@ -39,6 +39,8 @@ struct spu_context_ops;
#define SPU_CONTEXT_PREEMPT 0UL
struct spu_gang;
struct spu_context {
struct spu *spu; /* pointer to a physical SPU */
struct spu_state csa; /* SPU context save area. */
@ -48,6 +50,7 @@ struct spu_context {
struct address_space *cntl; /* 'control' area mappings. */
struct address_space *signal1; /* 'signal1' area mappings. */
struct address_space *signal2; /* 'signal2' area mappings. */
u64 object_id; /* user space pointer for oprofile */
enum { SPU_STATE_RUNNABLE, SPU_STATE_SAVED } state;
struct rw_semaphore state_sema;
@ -66,7 +69,18 @@ struct spu_context {
u32 tagwait;
struct spu_context_ops *ops;
struct work_struct reap_work;
u64 flags;
unsigned long flags;
unsigned long event_return;
struct list_head gang_list;
struct spu_gang *gang;
};
struct spu_gang {
struct list_head list;
struct mutex mutex;
struct kref kref;
int contexts;
};
struct mfc_dma_command {
@ -114,6 +128,7 @@ extern struct spu_context_ops spu_backing_ops;
struct spufs_inode_info {
struct spu_context *i_ctx;
struct spu_gang *i_gang;
struct inode vfs_inode;
};
#define SPUFS_I(inode) \
@ -124,12 +139,19 @@ extern struct tree_descr spufs_dir_contents[];
/* system call implementation */
long spufs_run_spu(struct file *file,
struct spu_context *ctx, u32 *npc, u32 *status);
long spufs_create_thread(struct nameidata *nd,
long spufs_create(struct nameidata *nd,
unsigned int flags, mode_t mode);
extern struct file_operations spufs_context_fops;
/* gang management */
struct spu_gang *alloc_spu_gang(void);
struct spu_gang *get_spu_gang(struct spu_gang *gang);
int put_spu_gang(struct spu_gang *gang);
void spu_gang_remove_ctx(struct spu_gang *gang, struct spu_context *ctx);
void spu_gang_add_ctx(struct spu_gang *gang, struct spu_context *ctx);
/* context management */
struct spu_context * alloc_spu_context(void);
struct spu_context * alloc_spu_context(struct spu_gang *gang);
void destroy_spu_context(struct kref *kref);
struct spu_context * get_spu_context(struct spu_context *ctx);
int put_spu_context(struct spu_context *ctx);
@ -183,5 +205,6 @@ void spufs_ibox_callback(struct spu *spu);
void spufs_wbox_callback(struct spu *spu);
void spufs_stop_callback(struct spu *spu);
void spufs_mfc_callback(struct spu *spu);
void spufs_dma_callback(struct spu *spu, int type);
#endif

9
arch/powerpc/platforms/cell/spufs/switch.c
View File

@ -1779,6 +1779,15 @@ static inline void restore_mfc_cntl(struct spu_state *csa, struct spu *spu)
*/
out_be64(&priv2->mfc_control_RW, csa->priv2.mfc_control_RW);
eieio();
/*
* FIXME: this is to restart a DMA that we were processing
* before the save. better remember the fault information
* in the csa instead.
*/
if ((csa->priv2.mfc_control_RW & MFC_CNTL_SUSPEND_DMA_QUEUE_MASK)) {
out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND);
eieio();
}
}
static inline void enable_user_access(struct spu_state *csa, struct spu *spu)

9
arch/powerpc/platforms/cell/spufs/syscalls.c
View File

@ -38,7 +38,7 @@ static long do_spu_run(struct file *filp,
u32 npc, status;
ret = -EFAULT;
if (get_user(npc, unpc) || get_user(status, ustatus))
if (get_user(npc, unpc))
goto out;
/* check if this file was created by spu_create */
@ -49,7 +49,10 @@ static long do_spu_run(struct file *filp,
i = SPUFS_I(filp->f_dentry->d_inode);
ret = spufs_run_spu(filp, i->i_ctx, &npc, &status);
if (put_user(npc, unpc) || put_user(status, ustatus))
if (put_user(npc, unpc))
ret = -EFAULT;
if (ustatus && put_user(status, ustatus))
ret = -EFAULT;
out:
return ret;
@ -87,7 +90,7 @@ asmlinkage long sys_spu_create(const char __user *pathname,
ret = path_lookup(tmp, LOOKUP_PARENT|
LOOKUP_OPEN|LOOKUP_CREATE, &nd);
if (!ret) {
ret = spufs_create_thread(&nd, flags, mode);
ret = spufs_create(&nd, flags, mode);
path_release(&nd);
}
putname(tmp);

36
include/asm-powerpc/spu.h
View File

@ -138,6 +138,7 @@ struct spu {
void (* ibox_callback)(struct spu *spu);
void (* stop_callback)(struct spu *spu);
void (* mfc_callback)(struct spu *spu);
void (* dma_callback)(struct spu *spu, int type);
char irq_c0[8];
char irq_c1[8];
@ -147,6 +148,7 @@ struct spu {
};
struct spu *spu_alloc(void);
struct spu *spu_alloc_node(int node);
void spu_free(struct spu *spu);
int spu_irq_class_0_bottom(struct spu *spu);
int spu_irq_class_1_bottom(struct spu *spu);
@ -168,6 +170,22 @@ extern struct spufs_calls {
struct module *owner;
} spufs_calls;
/* return status from spu_run, same as in libspe */
#define SPE_EVENT_DMA_ALIGNMENT 0x0008 /*A DMA alignment error */
#define SPE_EVENT_SPE_ERROR 0x0010 /*An illegal instruction error*/
#define SPE_EVENT_SPE_DATA_SEGMENT 0x0020 /*A DMA segmentation error */
#define SPE_EVENT_SPE_DATA_STORAGE 0x0040 /*A DMA storage error */
#define SPE_EVENT_INVALID_DMA 0x0800 /* Invalid MFC DMA */
/*
* Flags for sys_spu_create.
*/
#define SPU_CREATE_EVENTS_ENABLED 0x0001
#define SPU_CREATE_GANG 0x0002
#define SPU_CREATE_FLAG_ALL 0x0003 /* mask of all valid flags */
#ifdef CONFIG_SPU_FS_MODULE
int register_spu_syscalls(struct spufs_calls *calls);
void unregister_spu_syscalls(struct spufs_calls *calls);
@ -182,6 +200,24 @@ static inline void unregister_spu_syscalls(struct spufs_calls *calls)
#endif /* MODULE */
/*
* Notifier blocks:
*
* oprofile can get notified when a context switch is performed
* on an spe. The notifer function that gets called is passed
* a pointer to the SPU structure as well as the object-id that
* identifies the binary running on that SPU now.
*
* For a context save, the object-id that is passed is zero,
* identifying that the kernel will run from that moment on.
*
* For a context restore, the object-id is the value written
* to object-id spufs file from user space and the notifer
* function can assume that spu->ctx is valid.
*/
int spu_switch_event_register(struct notifier_block * n);
int spu_switch_event_unregister(struct notifier_block * n);
/*
* This defines the Local Store, Problem Area and Privlege Area of an SPU.
*/