167207b96SArnd Bergmann /* 267207b96SArnd Bergmann * SPU file system -- file contents 367207b96SArnd Bergmann * 467207b96SArnd Bergmann * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 567207b96SArnd Bergmann * 667207b96SArnd Bergmann * Author: Arnd Bergmann <arndb@de.ibm.com> 767207b96SArnd Bergmann * 867207b96SArnd Bergmann * This program is free software; you can redistribute it and/or modify 967207b96SArnd Bergmann * it under the terms of the GNU General Public License as published by 1067207b96SArnd Bergmann * the Free Software Foundation; either version 2, or (at your option) 1167207b96SArnd Bergmann * any later version. 1267207b96SArnd Bergmann * 1367207b96SArnd Bergmann * This program is distributed in the hope that it will be useful, 1467207b96SArnd Bergmann * but WITHOUT ANY WARRANTY; without even the implied warranty of 1567207b96SArnd Bergmann * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1667207b96SArnd Bergmann * GNU General Public License for more details. 1767207b96SArnd Bergmann * 1867207b96SArnd Bergmann * You should have received a copy of the GNU General Public License 1967207b96SArnd Bergmann * along with this program; if not, write to the Free Software 2067207b96SArnd Bergmann * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 2167207b96SArnd Bergmann */ 2267207b96SArnd Bergmann 23a33a7d73SArnd Bergmann #undef DEBUG 24a33a7d73SArnd Bergmann 2567207b96SArnd Bergmann #include <linux/fs.h> 2667207b96SArnd Bergmann #include <linux/ioctl.h> 2767207b96SArnd Bergmann #include <linux/module.h> 28d88cfffaSArnd Bergmann #include <linux/pagemap.h> 2967207b96SArnd Bergmann #include <linux/poll.h> 305110459fSArnd Bergmann #include <linux/ptrace.h> 31cbe709c1SBenjamin Herrenschmidt #include <linux/seq_file.h> 32038200cfSChristoph Hellwig #include <linux/marker.h> 3367207b96SArnd Bergmann 3467207b96SArnd Bergmann #include <asm/io.h> 35dfe1e09fSFUJITA Tomonori #include <asm/time.h> 3667207b96SArnd Bergmann #include <asm/spu.h> 37b9e3bd77SDwayne Grant McConnell #include <asm/spu_info.h> 3867207b96SArnd Bergmann #include <asm/uaccess.h> 3967207b96SArnd Bergmann 4067207b96SArnd Bergmann #include "spufs.h" 4167207b96SArnd Bergmann 4227d5bf2aSBenjamin Herrenschmidt #define SPUFS_MMAP_4K (PAGE_SIZE == 0x1000) 4327d5bf2aSBenjamin Herrenschmidt 44197b1a82SChristoph Hellwig /* Simple attribute files */ 45197b1a82SChristoph Hellwig struct spufs_attr { 46197b1a82SChristoph Hellwig int (*get)(void *, u64 *); 47197b1a82SChristoph Hellwig int (*set)(void *, u64); 48197b1a82SChristoph Hellwig char get_buf[24]; /* enough to store a u64 and "\n\0" */ 49197b1a82SChristoph Hellwig char set_buf[24]; 50197b1a82SChristoph Hellwig void *data; 51197b1a82SChristoph Hellwig const char *fmt; /* format for read operation */ 52197b1a82SChristoph Hellwig struct mutex mutex; /* protects access to these buffers */ 53197b1a82SChristoph Hellwig }; 54197b1a82SChristoph Hellwig 55197b1a82SChristoph Hellwig static int spufs_attr_open(struct inode *inode, struct file *file, 56197b1a82SChristoph Hellwig int (*get)(void *, u64 *), int (*set)(void *, u64), 57197b1a82SChristoph Hellwig const char *fmt) 58197b1a82SChristoph Hellwig { 59197b1a82SChristoph Hellwig struct spufs_attr *attr; 60197b1a82SChristoph Hellwig 61197b1a82SChristoph Hellwig attr = kmalloc(sizeof(*attr), GFP_KERNEL); 62197b1a82SChristoph Hellwig if (!attr) 63197b1a82SChristoph Hellwig return -ENOMEM; 64197b1a82SChristoph Hellwig 65197b1a82SChristoph Hellwig attr->get = get; 66197b1a82SChristoph Hellwig attr->set = set; 67197b1a82SChristoph Hellwig attr->data = inode->i_private; 68197b1a82SChristoph Hellwig attr->fmt = fmt; 69197b1a82SChristoph Hellwig mutex_init(&attr->mutex); 70197b1a82SChristoph Hellwig file->private_data = attr; 71197b1a82SChristoph Hellwig 72197b1a82SChristoph Hellwig return nonseekable_open(inode, file); 73197b1a82SChristoph Hellwig } 74197b1a82SChristoph Hellwig 75197b1a82SChristoph Hellwig static int spufs_attr_release(struct inode *inode, struct file *file) 76197b1a82SChristoph Hellwig { 77197b1a82SChristoph Hellwig kfree(file->private_data); 78197b1a82SChristoph Hellwig return 0; 79197b1a82SChristoph Hellwig } 80197b1a82SChristoph Hellwig 81197b1a82SChristoph Hellwig static ssize_t spufs_attr_read(struct file *file, char __user *buf, 82197b1a82SChristoph Hellwig size_t len, loff_t *ppos) 83197b1a82SChristoph Hellwig { 84197b1a82SChristoph Hellwig struct spufs_attr *attr; 85197b1a82SChristoph Hellwig size_t size; 86197b1a82SChristoph Hellwig ssize_t ret; 87197b1a82SChristoph Hellwig 88197b1a82SChristoph Hellwig attr = file->private_data; 89197b1a82SChristoph Hellwig if (!attr->get) 90197b1a82SChristoph Hellwig return -EACCES; 91197b1a82SChristoph Hellwig 92197b1a82SChristoph Hellwig ret = mutex_lock_interruptible(&attr->mutex); 93197b1a82SChristoph Hellwig if (ret) 94197b1a82SChristoph Hellwig return ret; 95197b1a82SChristoph Hellwig 96197b1a82SChristoph Hellwig if (*ppos) { /* continued read */ 97197b1a82SChristoph Hellwig size = strlen(attr->get_buf); 98197b1a82SChristoph Hellwig } else { /* first read */ 99197b1a82SChristoph Hellwig u64 val; 100197b1a82SChristoph Hellwig ret = attr->get(attr->data, &val); 101197b1a82SChristoph Hellwig if (ret) 102197b1a82SChristoph Hellwig goto out; 103197b1a82SChristoph Hellwig 104197b1a82SChristoph Hellwig size = scnprintf(attr->get_buf, sizeof(attr->get_buf), 105197b1a82SChristoph Hellwig attr->fmt, (unsigned long long)val); 106197b1a82SChristoph Hellwig } 107197b1a82SChristoph Hellwig 108197b1a82SChristoph Hellwig ret = simple_read_from_buffer(buf, len, ppos, attr->get_buf, size); 109197b1a82SChristoph Hellwig out: 110197b1a82SChristoph Hellwig mutex_unlock(&attr->mutex); 111197b1a82SChristoph Hellwig return ret; 112197b1a82SChristoph Hellwig } 113197b1a82SChristoph Hellwig 114197b1a82SChristoph Hellwig static ssize_t spufs_attr_write(struct file *file, const char __user *buf, 115197b1a82SChristoph Hellwig size_t len, loff_t *ppos) 116197b1a82SChristoph Hellwig { 117197b1a82SChristoph Hellwig struct spufs_attr *attr; 118197b1a82SChristoph Hellwig u64 val; 119197b1a82SChristoph Hellwig size_t size; 120197b1a82SChristoph Hellwig ssize_t ret; 121197b1a82SChristoph Hellwig 122197b1a82SChristoph Hellwig attr = file->private_data; 123197b1a82SChristoph Hellwig if (!attr->set) 124197b1a82SChristoph Hellwig return -EACCES; 125197b1a82SChristoph Hellwig 126197b1a82SChristoph Hellwig ret = mutex_lock_interruptible(&attr->mutex); 127197b1a82SChristoph Hellwig if (ret) 128197b1a82SChristoph Hellwig return ret; 129197b1a82SChristoph Hellwig 130197b1a82SChristoph Hellwig ret = -EFAULT; 131197b1a82SChristoph Hellwig size = min(sizeof(attr->set_buf) - 1, len); 132197b1a82SChristoph Hellwig if (copy_from_user(attr->set_buf, buf, size)) 133197b1a82SChristoph Hellwig goto out; 134197b1a82SChristoph Hellwig 135197b1a82SChristoph Hellwig ret = len; /* claim we got the whole input */ 136197b1a82SChristoph Hellwig attr->set_buf[size] = '\0'; 137197b1a82SChristoph Hellwig val = simple_strtol(attr->set_buf, NULL, 0); 138197b1a82SChristoph Hellwig attr->set(attr->data, val); 139197b1a82SChristoph Hellwig out: 140197b1a82SChristoph Hellwig mutex_unlock(&attr->mutex); 141197b1a82SChristoph Hellwig return ret; 142197b1a82SChristoph Hellwig } 143197b1a82SChristoph Hellwig 144197b1a82SChristoph Hellwig #define DEFINE_SPUFS_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt) \ 145197b1a82SChristoph Hellwig static int __fops ## _open(struct inode *inode, struct file *file) \ 146197b1a82SChristoph Hellwig { \ 147197b1a82SChristoph Hellwig __simple_attr_check_format(__fmt, 0ull); \ 148197b1a82SChristoph Hellwig return spufs_attr_open(inode, file, __get, __set, __fmt); \ 149197b1a82SChristoph Hellwig } \ 150197b1a82SChristoph Hellwig static struct file_operations __fops = { \ 151197b1a82SChristoph Hellwig .owner = THIS_MODULE, \ 152197b1a82SChristoph Hellwig .open = __fops ## _open, \ 153197b1a82SChristoph Hellwig .release = spufs_attr_release, \ 154197b1a82SChristoph Hellwig .read = spufs_attr_read, \ 155197b1a82SChristoph Hellwig .write = spufs_attr_write, \ 156197b1a82SChristoph Hellwig }; 157197b1a82SChristoph Hellwig 158cbe709c1SBenjamin Herrenschmidt 15967207b96SArnd Bergmann static int 16067207b96SArnd Bergmann spufs_mem_open(struct inode *inode, struct file *file) 16167207b96SArnd Bergmann { 16267207b96SArnd Bergmann struct spufs_inode_info *i = SPUFS_I(inode); 1636df10a82SMark Nutter struct spu_context *ctx = i->i_ctx; 16443c2bbd9SChristoph Hellwig 16547d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 1666df10a82SMark Nutter file->private_data = ctx; 16743c2bbd9SChristoph Hellwig if (!i->i_openers++) 1686df10a82SMark Nutter ctx->local_store = inode->i_mapping; 16947d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 17043c2bbd9SChristoph Hellwig return 0; 17143c2bbd9SChristoph Hellwig } 17243c2bbd9SChristoph Hellwig 17343c2bbd9SChristoph Hellwig static int 17443c2bbd9SChristoph Hellwig spufs_mem_release(struct inode *inode, struct file *file) 17543c2bbd9SChristoph Hellwig { 17643c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 17743c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 17843c2bbd9SChristoph Hellwig 17947d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 18043c2bbd9SChristoph Hellwig if (!--i->i_openers) 18143c2bbd9SChristoph Hellwig ctx->local_store = NULL; 18247d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 18367207b96SArnd Bergmann return 0; 18467207b96SArnd Bergmann } 18567207b96SArnd Bergmann 18667207b96SArnd Bergmann static ssize_t 187bf1ab978SDwayne Grant McConnell __spufs_mem_read(struct spu_context *ctx, char __user *buffer, 188bf1ab978SDwayne Grant McConnell size_t size, loff_t *pos) 189bf1ab978SDwayne Grant McConnell { 190bf1ab978SDwayne Grant McConnell char *local_store = ctx->ops->get_ls(ctx); 191bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buffer, size, pos, local_store, 192bf1ab978SDwayne Grant McConnell LS_SIZE); 193bf1ab978SDwayne Grant McConnell } 194bf1ab978SDwayne Grant McConnell 195bf1ab978SDwayne Grant McConnell static ssize_t 19667207b96SArnd Bergmann spufs_mem_read(struct file *file, char __user *buffer, 19767207b96SArnd Bergmann size_t size, loff_t *pos) 19867207b96SArnd Bergmann { 199bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 200aa0ed2bdSArnd Bergmann ssize_t ret; 20167207b96SArnd Bergmann 202c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 203c9101bdbSChristoph Hellwig if (ret) 204c9101bdbSChristoph Hellwig return ret; 205bf1ab978SDwayne Grant McConnell ret = __spufs_mem_read(ctx, buffer, size, pos); 2068b3d6663SArnd Bergmann spu_release(ctx); 207c9101bdbSChristoph Hellwig 20867207b96SArnd Bergmann return ret; 20967207b96SArnd Bergmann } 21067207b96SArnd Bergmann 21167207b96SArnd Bergmann static ssize_t 21267207b96SArnd Bergmann spufs_mem_write(struct file *file, const char __user *buffer, 213aa0ed2bdSArnd Bergmann size_t size, loff_t *ppos) 21467207b96SArnd Bergmann { 21567207b96SArnd Bergmann struct spu_context *ctx = file->private_data; 2168b3d6663SArnd Bergmann char *local_store; 217aa0ed2bdSArnd Bergmann loff_t pos = *ppos; 2188b3d6663SArnd Bergmann int ret; 21967207b96SArnd Bergmann 220aa0ed2bdSArnd Bergmann if (pos < 0) 221aa0ed2bdSArnd Bergmann return -EINVAL; 222aa0ed2bdSArnd Bergmann if (pos > LS_SIZE) 22367207b96SArnd Bergmann return -EFBIG; 224aa0ed2bdSArnd Bergmann if (size > LS_SIZE - pos) 225aa0ed2bdSArnd Bergmann size = LS_SIZE - pos; 2268b3d6663SArnd Bergmann 227c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 228c9101bdbSChristoph Hellwig if (ret) 229c9101bdbSChristoph Hellwig return ret; 230c9101bdbSChristoph Hellwig 2318b3d6663SArnd Bergmann local_store = ctx->ops->get_ls(ctx); 232aa0ed2bdSArnd Bergmann ret = copy_from_user(local_store + pos, buffer, size); 2338b3d6663SArnd Bergmann spu_release(ctx); 234aa0ed2bdSArnd Bergmann 235aa0ed2bdSArnd Bergmann if (ret) 236aa0ed2bdSArnd Bergmann return -EFAULT; 237aa0ed2bdSArnd Bergmann *ppos = pos + size; 238aa0ed2bdSArnd Bergmann return size; 23967207b96SArnd Bergmann } 24067207b96SArnd Bergmann 241b1e2270fSNick Piggin static int 242b1e2270fSNick Piggin spufs_mem_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 2438b3d6663SArnd Bergmann { 2448b3d6663SArnd Bergmann struct spu_context *ctx = vma->vm_file->private_data; 245b1e2270fSNick Piggin unsigned long address = (unsigned long)vmf->virtual_address; 246b1e2270fSNick Piggin unsigned long pfn, offset; 247b1e2270fSNick Piggin 248f1fa74f4SBenjamin Herrenschmidt #ifdef CONFIG_SPU_FS_64K_LS 249f1fa74f4SBenjamin Herrenschmidt struct spu_state *csa = &ctx->csa; 250f1fa74f4SBenjamin Herrenschmidt int psize; 25178bde53eSBenjamin Herrenschmidt 252f1fa74f4SBenjamin Herrenschmidt /* Check what page size we are using */ 253f1fa74f4SBenjamin Herrenschmidt psize = get_slice_psize(vma->vm_mm, address); 2548b3d6663SArnd Bergmann 255f1fa74f4SBenjamin Herrenschmidt /* Some sanity checking */ 256f1fa74f4SBenjamin Herrenschmidt BUG_ON(csa->use_big_pages != (psize == MMU_PAGE_64K)); 257f1fa74f4SBenjamin Herrenschmidt 258f1fa74f4SBenjamin Herrenschmidt /* Wow, 64K, cool, we need to align the address though */ 259f1fa74f4SBenjamin Herrenschmidt if (csa->use_big_pages) { 260f1fa74f4SBenjamin Herrenschmidt BUG_ON(vma->vm_start & 0xffff); 261f1fa74f4SBenjamin Herrenschmidt address &= ~0xfffful; 262f1fa74f4SBenjamin Herrenschmidt } 263f1fa74f4SBenjamin Herrenschmidt #endif /* CONFIG_SPU_FS_64K_LS */ 264f1fa74f4SBenjamin Herrenschmidt 265b1e2270fSNick Piggin offset = vmf->pgoff << PAGE_SHIFT; 266128b8546SMasato Noguchi if (offset >= LS_SIZE) 267b1e2270fSNick Piggin return VM_FAULT_SIGBUS; 268128b8546SMasato Noguchi 269b1e2270fSNick Piggin pr_debug("spufs_mem_mmap_fault address=0x%lx, offset=0x%lx\n", 270b1e2270fSNick Piggin address, offset); 271f1fa74f4SBenjamin Herrenschmidt 272c9101bdbSChristoph Hellwig if (spu_acquire(ctx)) 273b1e2270fSNick Piggin return VM_FAULT_NOPAGE; 2748b3d6663SArnd Bergmann 275ac91cb8dSArnd Bergmann if (ctx->state == SPU_STATE_SAVED) { 27664b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_cached(vma->vm_page_prot); 27778bde53eSBenjamin Herrenschmidt pfn = vmalloc_to_pfn(ctx->csa.lscsa->ls + offset); 278ac91cb8dSArnd Bergmann } else { 27964b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached_wc(vma->vm_page_prot); 28078bde53eSBenjamin Herrenschmidt pfn = (ctx->spu->local_store_phys + offset) >> PAGE_SHIFT; 281ac91cb8dSArnd Bergmann } 28278bde53eSBenjamin Herrenschmidt vm_insert_pfn(vma, address, pfn); 28378bde53eSBenjamin Herrenschmidt 2848b3d6663SArnd Bergmann spu_release(ctx); 2858b3d6663SArnd Bergmann 286b1e2270fSNick Piggin return VM_FAULT_NOPAGE; 2878b3d6663SArnd Bergmann } 2888b3d6663SArnd Bergmann 289a352894dSBenjamin Herrenschmidt static int spufs_mem_mmap_access(struct vm_area_struct *vma, 290a352894dSBenjamin Herrenschmidt unsigned long address, 291a352894dSBenjamin Herrenschmidt void *buf, int len, int write) 292a352894dSBenjamin Herrenschmidt { 293a352894dSBenjamin Herrenschmidt struct spu_context *ctx = vma->vm_file->private_data; 294a352894dSBenjamin Herrenschmidt unsigned long offset = address - vma->vm_start; 295a352894dSBenjamin Herrenschmidt char *local_store; 296a352894dSBenjamin Herrenschmidt 297a352894dSBenjamin Herrenschmidt if (write && !(vma->vm_flags & VM_WRITE)) 298a352894dSBenjamin Herrenschmidt return -EACCES; 299a352894dSBenjamin Herrenschmidt if (spu_acquire(ctx)) 300a352894dSBenjamin Herrenschmidt return -EINTR; 301a352894dSBenjamin Herrenschmidt if ((offset + len) > vma->vm_end) 302a352894dSBenjamin Herrenschmidt len = vma->vm_end - offset; 303a352894dSBenjamin Herrenschmidt local_store = ctx->ops->get_ls(ctx); 304a352894dSBenjamin Herrenschmidt if (write) 305a352894dSBenjamin Herrenschmidt memcpy_toio(local_store + offset, buf, len); 306a352894dSBenjamin Herrenschmidt else 307a352894dSBenjamin Herrenschmidt memcpy_fromio(buf, local_store + offset, len); 308a352894dSBenjamin Herrenschmidt spu_release(ctx); 309a352894dSBenjamin Herrenschmidt return len; 310a352894dSBenjamin Herrenschmidt } 31178bde53eSBenjamin Herrenschmidt 3128b3d6663SArnd Bergmann static struct vm_operations_struct spufs_mem_mmap_vmops = { 313b1e2270fSNick Piggin .fault = spufs_mem_mmap_fault, 314a352894dSBenjamin Herrenschmidt .access = spufs_mem_mmap_access, 3158b3d6663SArnd Bergmann }; 3168b3d6663SArnd Bergmann 317f1fa74f4SBenjamin Herrenschmidt static int spufs_mem_mmap(struct file *file, struct vm_area_struct *vma) 31867207b96SArnd Bergmann { 319f1fa74f4SBenjamin Herrenschmidt #ifdef CONFIG_SPU_FS_64K_LS 320f1fa74f4SBenjamin Herrenschmidt struct spu_context *ctx = file->private_data; 321f1fa74f4SBenjamin Herrenschmidt struct spu_state *csa = &ctx->csa; 322f1fa74f4SBenjamin Herrenschmidt 323f1fa74f4SBenjamin Herrenschmidt /* Sanity check VMA alignment */ 324f1fa74f4SBenjamin Herrenschmidt if (csa->use_big_pages) { 325f1fa74f4SBenjamin Herrenschmidt pr_debug("spufs_mem_mmap 64K, start=0x%lx, end=0x%lx," 326f1fa74f4SBenjamin Herrenschmidt " pgoff=0x%lx\n", vma->vm_start, vma->vm_end, 327f1fa74f4SBenjamin Herrenschmidt vma->vm_pgoff); 328f1fa74f4SBenjamin Herrenschmidt if (vma->vm_start & 0xffff) 329f1fa74f4SBenjamin Herrenschmidt return -EINVAL; 330f1fa74f4SBenjamin Herrenschmidt if (vma->vm_pgoff & 0xf) 331f1fa74f4SBenjamin Herrenschmidt return -EINVAL; 332f1fa74f4SBenjamin Herrenschmidt } 333f1fa74f4SBenjamin Herrenschmidt #endif /* CONFIG_SPU_FS_64K_LS */ 334f1fa74f4SBenjamin Herrenschmidt 3358b3d6663SArnd Bergmann if (!(vma->vm_flags & VM_SHARED)) 3368b3d6663SArnd Bergmann return -EINVAL; 33767207b96SArnd Bergmann 33878bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 33964b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached_wc(vma->vm_page_prot); 3408b3d6663SArnd Bergmann 3418b3d6663SArnd Bergmann vma->vm_ops = &spufs_mem_mmap_vmops; 34267207b96SArnd Bergmann return 0; 34367207b96SArnd Bergmann } 34467207b96SArnd Bergmann 345f1fa74f4SBenjamin Herrenschmidt #ifdef CONFIG_SPU_FS_64K_LS 3461238819aSSebastian Siewior static unsigned long spufs_get_unmapped_area(struct file *file, 3471238819aSSebastian Siewior unsigned long addr, unsigned long len, unsigned long pgoff, 348f1fa74f4SBenjamin Herrenschmidt unsigned long flags) 349f1fa74f4SBenjamin Herrenschmidt { 350f1fa74f4SBenjamin Herrenschmidt struct spu_context *ctx = file->private_data; 351f1fa74f4SBenjamin Herrenschmidt struct spu_state *csa = &ctx->csa; 352f1fa74f4SBenjamin Herrenschmidt 353f1fa74f4SBenjamin Herrenschmidt /* If not using big pages, fallback to normal MM g_u_a */ 354f1fa74f4SBenjamin Herrenschmidt if (!csa->use_big_pages) 355f1fa74f4SBenjamin Herrenschmidt return current->mm->get_unmapped_area(file, addr, len, 356f1fa74f4SBenjamin Herrenschmidt pgoff, flags); 357f1fa74f4SBenjamin Herrenschmidt 358f1fa74f4SBenjamin Herrenschmidt /* Else, try to obtain a 64K pages slice */ 359f1fa74f4SBenjamin Herrenschmidt return slice_get_unmapped_area(addr, len, flags, 360f1fa74f4SBenjamin Herrenschmidt MMU_PAGE_64K, 1, 0); 361f1fa74f4SBenjamin Herrenschmidt } 362f1fa74f4SBenjamin Herrenschmidt #endif /* CONFIG_SPU_FS_64K_LS */ 363f1fa74f4SBenjamin Herrenschmidt 3645dfe4c96SArjan van de Ven static const struct file_operations spufs_mem_fops = { 36567207b96SArnd Bergmann .open = spufs_mem_open, 366ce92987bSChristoph Hellwig .release = spufs_mem_release, 36767207b96SArnd Bergmann .read = spufs_mem_read, 36867207b96SArnd Bergmann .write = spufs_mem_write, 3698b3d6663SArnd Bergmann .llseek = generic_file_llseek, 37067207b96SArnd Bergmann .mmap = spufs_mem_mmap, 371f1fa74f4SBenjamin Herrenschmidt #ifdef CONFIG_SPU_FS_64K_LS 372f1fa74f4SBenjamin Herrenschmidt .get_unmapped_area = spufs_get_unmapped_area, 373f1fa74f4SBenjamin Herrenschmidt #endif 3748b3d6663SArnd Bergmann }; 3758b3d6663SArnd Bergmann 376b1e2270fSNick Piggin static int spufs_ps_fault(struct vm_area_struct *vma, 377b1e2270fSNick Piggin struct vm_fault *vmf, 37878bde53eSBenjamin Herrenschmidt unsigned long ps_offs, 37927d5bf2aSBenjamin Herrenschmidt unsigned long ps_size) 3806df10a82SMark Nutter { 3816df10a82SMark Nutter struct spu_context *ctx = vma->vm_file->private_data; 382b1e2270fSNick Piggin unsigned long area, offset = vmf->pgoff << PAGE_SHIFT; 383eebead5bSChristoph Hellwig int ret = 0; 3846df10a82SMark Nutter 385b1e2270fSNick Piggin spu_context_nospu_trace(spufs_ps_fault__enter, ctx); 386038200cfSChristoph Hellwig 38727d5bf2aSBenjamin Herrenschmidt if (offset >= ps_size) 388b1e2270fSNick Piggin return VM_FAULT_SIGBUS; 3896df10a82SMark Nutter 39060657263SJeremy Kerr if (fatal_signal_pending(current)) 39160657263SJeremy Kerr return VM_FAULT_SIGBUS; 39260657263SJeremy Kerr 39333bfd7a7SArnd Bergmann /* 394d5883137SJeremy Kerr * Because we release the mmap_sem, the context may be destroyed while 395d5883137SJeremy Kerr * we're in spu_wait. Grab an extra reference so it isn't destroyed 396d5883137SJeremy Kerr * in the meantime. 397d5883137SJeremy Kerr */ 398d5883137SJeremy Kerr get_spu_context(ctx); 399d5883137SJeremy Kerr 400d5883137SJeremy Kerr /* 40133bfd7a7SArnd Bergmann * We have to wait for context to be loaded before we have 40233bfd7a7SArnd Bergmann * pages to hand out to the user, but we don't want to wait 40333bfd7a7SArnd Bergmann * with the mmap_sem held. 40433bfd7a7SArnd Bergmann * It is possible to drop the mmap_sem here, but then we need 405b1e2270fSNick Piggin * to return VM_FAULT_NOPAGE because the mappings may have 40633bfd7a7SArnd Bergmann * hanged. 40778bde53eSBenjamin Herrenschmidt */ 408c9101bdbSChristoph Hellwig if (spu_acquire(ctx)) 409d5883137SJeremy Kerr goto refault; 410c9101bdbSChristoph Hellwig 41133bfd7a7SArnd Bergmann if (ctx->state == SPU_STATE_SAVED) { 41233bfd7a7SArnd Bergmann up_read(¤t->mm->mmap_sem); 413b1e2270fSNick Piggin spu_context_nospu_trace(spufs_ps_fault__sleep, ctx); 414eebead5bSChristoph Hellwig ret = spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE); 415b1e2270fSNick Piggin spu_context_trace(spufs_ps_fault__wake, ctx, ctx->spu); 41633bfd7a7SArnd Bergmann down_read(¤t->mm->mmap_sem); 417c9101bdbSChristoph Hellwig } else { 4186df10a82SMark Nutter area = ctx->spu->problem_phys + ps_offs; 419b1e2270fSNick Piggin vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, 420b1e2270fSNick Piggin (area + offset) >> PAGE_SHIFT); 421b1e2270fSNick Piggin spu_context_trace(spufs_ps_fault__insert, ctx, ctx->spu); 422c9101bdbSChristoph Hellwig } 42333bfd7a7SArnd Bergmann 424eebead5bSChristoph Hellwig if (!ret) 4256df10a82SMark Nutter spu_release(ctx); 426d5883137SJeremy Kerr 427d5883137SJeremy Kerr refault: 428d5883137SJeremy Kerr put_spu_context(ctx); 429b1e2270fSNick Piggin return VM_FAULT_NOPAGE; 4306df10a82SMark Nutter } 4316df10a82SMark Nutter 43227d5bf2aSBenjamin Herrenschmidt #if SPUFS_MMAP_4K 433b1e2270fSNick Piggin static int spufs_cntl_mmap_fault(struct vm_area_struct *vma, 434b1e2270fSNick Piggin struct vm_fault *vmf) 4356df10a82SMark Nutter { 43687ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x4000, SPUFS_CNTL_MAP_SIZE); 4376df10a82SMark Nutter } 4386df10a82SMark Nutter 4396df10a82SMark Nutter static struct vm_operations_struct spufs_cntl_mmap_vmops = { 440b1e2270fSNick Piggin .fault = spufs_cntl_mmap_fault, 4416df10a82SMark Nutter }; 4426df10a82SMark Nutter 4436df10a82SMark Nutter /* 4446df10a82SMark Nutter * mmap support for problem state control area [0x4000 - 0x4fff]. 4456df10a82SMark Nutter */ 4466df10a82SMark Nutter static int spufs_cntl_mmap(struct file *file, struct vm_area_struct *vma) 4476df10a82SMark Nutter { 4486df10a82SMark Nutter if (!(vma->vm_flags & VM_SHARED)) 4496df10a82SMark Nutter return -EINVAL; 4506df10a82SMark Nutter 45178bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 45264b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 4536df10a82SMark Nutter 4546df10a82SMark Nutter vma->vm_ops = &spufs_cntl_mmap_vmops; 4556df10a82SMark Nutter return 0; 4566df10a82SMark Nutter } 45727d5bf2aSBenjamin Herrenschmidt #else /* SPUFS_MMAP_4K */ 45827d5bf2aSBenjamin Herrenschmidt #define spufs_cntl_mmap NULL 45927d5bf2aSBenjamin Herrenschmidt #endif /* !SPUFS_MMAP_4K */ 4606df10a82SMark Nutter 461197b1a82SChristoph Hellwig static int spufs_cntl_get(void *data, u64 *val) 462e1dbff2bSArnd Bergmann { 463e1dbff2bSArnd Bergmann struct spu_context *ctx = data; 464c9101bdbSChristoph Hellwig int ret; 465e1dbff2bSArnd Bergmann 466c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 467c9101bdbSChristoph Hellwig if (ret) 468c9101bdbSChristoph Hellwig return ret; 469197b1a82SChristoph Hellwig *val = ctx->ops->status_read(ctx); 470e1dbff2bSArnd Bergmann spu_release(ctx); 471e1dbff2bSArnd Bergmann 472197b1a82SChristoph Hellwig return 0; 473e1dbff2bSArnd Bergmann } 474e1dbff2bSArnd Bergmann 475197b1a82SChristoph Hellwig static int spufs_cntl_set(void *data, u64 val) 476e1dbff2bSArnd Bergmann { 477e1dbff2bSArnd Bergmann struct spu_context *ctx = data; 478c9101bdbSChristoph Hellwig int ret; 479e1dbff2bSArnd Bergmann 480c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 481c9101bdbSChristoph Hellwig if (ret) 482c9101bdbSChristoph Hellwig return ret; 483e1dbff2bSArnd Bergmann ctx->ops->runcntl_write(ctx, val); 484e1dbff2bSArnd Bergmann spu_release(ctx); 485197b1a82SChristoph Hellwig 486197b1a82SChristoph Hellwig return 0; 487e1dbff2bSArnd Bergmann } 488e1dbff2bSArnd Bergmann 4896df10a82SMark Nutter static int spufs_cntl_open(struct inode *inode, struct file *file) 4906df10a82SMark Nutter { 4916df10a82SMark Nutter struct spufs_inode_info *i = SPUFS_I(inode); 4926df10a82SMark Nutter struct spu_context *ctx = i->i_ctx; 4936df10a82SMark Nutter 49447d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 4956df10a82SMark Nutter file->private_data = ctx; 49643c2bbd9SChristoph Hellwig if (!i->i_openers++) 4976df10a82SMark Nutter ctx->cntl = inode->i_mapping; 49847d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 4998b88b099SChristoph Hellwig return simple_attr_open(inode, file, spufs_cntl_get, 500e1dbff2bSArnd Bergmann spufs_cntl_set, "0x%08lx"); 5016df10a82SMark Nutter } 5026df10a82SMark Nutter 50343c2bbd9SChristoph Hellwig static int 50443c2bbd9SChristoph Hellwig spufs_cntl_release(struct inode *inode, struct file *file) 50543c2bbd9SChristoph Hellwig { 50643c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 50743c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 50843c2bbd9SChristoph Hellwig 50974bedc4dSChristoph Hellwig simple_attr_release(inode, file); 51043c2bbd9SChristoph Hellwig 51147d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 51243c2bbd9SChristoph Hellwig if (!--i->i_openers) 51343c2bbd9SChristoph Hellwig ctx->cntl = NULL; 51447d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 51543c2bbd9SChristoph Hellwig return 0; 51643c2bbd9SChristoph Hellwig } 51743c2bbd9SChristoph Hellwig 5185dfe4c96SArjan van de Ven static const struct file_operations spufs_cntl_fops = { 5196df10a82SMark Nutter .open = spufs_cntl_open, 52043c2bbd9SChristoph Hellwig .release = spufs_cntl_release, 5218b88b099SChristoph Hellwig .read = simple_attr_read, 5228b88b099SChristoph Hellwig .write = simple_attr_write, 5236df10a82SMark Nutter .mmap = spufs_cntl_mmap, 5246df10a82SMark Nutter }; 5256df10a82SMark Nutter 5268b3d6663SArnd Bergmann static int 5278b3d6663SArnd Bergmann spufs_regs_open(struct inode *inode, struct file *file) 5288b3d6663SArnd Bergmann { 5298b3d6663SArnd Bergmann struct spufs_inode_info *i = SPUFS_I(inode); 5308b3d6663SArnd Bergmann file->private_data = i->i_ctx; 5318b3d6663SArnd Bergmann return 0; 5328b3d6663SArnd Bergmann } 5338b3d6663SArnd Bergmann 5348b3d6663SArnd Bergmann static ssize_t 535bf1ab978SDwayne Grant McConnell __spufs_regs_read(struct spu_context *ctx, char __user *buffer, 536bf1ab978SDwayne Grant McConnell size_t size, loff_t *pos) 537bf1ab978SDwayne Grant McConnell { 538bf1ab978SDwayne Grant McConnell struct spu_lscsa *lscsa = ctx->csa.lscsa; 539bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buffer, size, pos, 540bf1ab978SDwayne Grant McConnell lscsa->gprs, sizeof lscsa->gprs); 541bf1ab978SDwayne Grant McConnell } 542bf1ab978SDwayne Grant McConnell 543bf1ab978SDwayne Grant McConnell static ssize_t 5448b3d6663SArnd Bergmann spufs_regs_read(struct file *file, char __user *buffer, 5458b3d6663SArnd Bergmann size_t size, loff_t *pos) 5468b3d6663SArnd Bergmann { 5478b3d6663SArnd Bergmann int ret; 548bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 5498b3d6663SArnd Bergmann 550f027faa2SJeremy Kerr /* pre-check for file position: if we'd return EOF, there's no point 551f027faa2SJeremy Kerr * causing a deschedule */ 552f027faa2SJeremy Kerr if (*pos >= sizeof(ctx->csa.lscsa->gprs)) 553f027faa2SJeremy Kerr return 0; 554f027faa2SJeremy Kerr 555c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 556c9101bdbSChristoph Hellwig if (ret) 557c9101bdbSChristoph Hellwig return ret; 558bf1ab978SDwayne Grant McConnell ret = __spufs_regs_read(ctx, buffer, size, pos); 55927b1ea09SChristoph Hellwig spu_release_saved(ctx); 5608b3d6663SArnd Bergmann return ret; 5618b3d6663SArnd Bergmann } 5628b3d6663SArnd Bergmann 5638b3d6663SArnd Bergmann static ssize_t 5648b3d6663SArnd Bergmann spufs_regs_write(struct file *file, const char __user *buffer, 5658b3d6663SArnd Bergmann size_t size, loff_t *pos) 5668b3d6663SArnd Bergmann { 5678b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 5688b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 5698b3d6663SArnd Bergmann int ret; 5708b3d6663SArnd Bergmann 5718b3d6663SArnd Bergmann size = min_t(ssize_t, sizeof lscsa->gprs - *pos, size); 5728b3d6663SArnd Bergmann if (size <= 0) 5738b3d6663SArnd Bergmann return -EFBIG; 5748b3d6663SArnd Bergmann *pos += size; 5758b3d6663SArnd Bergmann 576c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 577c9101bdbSChristoph Hellwig if (ret) 578c9101bdbSChristoph Hellwig return ret; 5798b3d6663SArnd Bergmann 5808b3d6663SArnd Bergmann ret = copy_from_user(lscsa->gprs + *pos - size, 5818b3d6663SArnd Bergmann buffer, size) ? -EFAULT : size; 5828b3d6663SArnd Bergmann 58327b1ea09SChristoph Hellwig spu_release_saved(ctx); 5848b3d6663SArnd Bergmann return ret; 5858b3d6663SArnd Bergmann } 5868b3d6663SArnd Bergmann 5875dfe4c96SArjan van de Ven static const struct file_operations spufs_regs_fops = { 5888b3d6663SArnd Bergmann .open = spufs_regs_open, 5898b3d6663SArnd Bergmann .read = spufs_regs_read, 5908b3d6663SArnd Bergmann .write = spufs_regs_write, 5918b3d6663SArnd Bergmann .llseek = generic_file_llseek, 5928b3d6663SArnd Bergmann }; 5938b3d6663SArnd Bergmann 5948b3d6663SArnd Bergmann static ssize_t 595bf1ab978SDwayne Grant McConnell __spufs_fpcr_read(struct spu_context *ctx, char __user * buffer, 596bf1ab978SDwayne Grant McConnell size_t size, loff_t * pos) 597bf1ab978SDwayne Grant McConnell { 598bf1ab978SDwayne Grant McConnell struct spu_lscsa *lscsa = ctx->csa.lscsa; 599bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buffer, size, pos, 600bf1ab978SDwayne Grant McConnell &lscsa->fpcr, sizeof(lscsa->fpcr)); 601bf1ab978SDwayne Grant McConnell } 602bf1ab978SDwayne Grant McConnell 603bf1ab978SDwayne Grant McConnell static ssize_t 6048b3d6663SArnd Bergmann spufs_fpcr_read(struct file *file, char __user * buffer, 6058b3d6663SArnd Bergmann size_t size, loff_t * pos) 6068b3d6663SArnd Bergmann { 6078b3d6663SArnd Bergmann int ret; 608bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 6098b3d6663SArnd Bergmann 610c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 611c9101bdbSChristoph Hellwig if (ret) 612c9101bdbSChristoph Hellwig return ret; 613bf1ab978SDwayne Grant McConnell ret = __spufs_fpcr_read(ctx, buffer, size, pos); 61427b1ea09SChristoph Hellwig spu_release_saved(ctx); 6158b3d6663SArnd Bergmann return ret; 6168b3d6663SArnd Bergmann } 6178b3d6663SArnd Bergmann 6188b3d6663SArnd Bergmann static ssize_t 6198b3d6663SArnd Bergmann spufs_fpcr_write(struct file *file, const char __user * buffer, 6208b3d6663SArnd Bergmann size_t size, loff_t * pos) 6218b3d6663SArnd Bergmann { 6228b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 6238b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 6248b3d6663SArnd Bergmann int ret; 6258b3d6663SArnd Bergmann 6268b3d6663SArnd Bergmann size = min_t(ssize_t, sizeof(lscsa->fpcr) - *pos, size); 6278b3d6663SArnd Bergmann if (size <= 0) 6288b3d6663SArnd Bergmann return -EFBIG; 629c9101bdbSChristoph Hellwig 630c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 631c9101bdbSChristoph Hellwig if (ret) 632c9101bdbSChristoph Hellwig return ret; 633c9101bdbSChristoph Hellwig 6348b3d6663SArnd Bergmann *pos += size; 6358b3d6663SArnd Bergmann ret = copy_from_user((char *)&lscsa->fpcr + *pos - size, 6368b3d6663SArnd Bergmann buffer, size) ? -EFAULT : size; 6378b3d6663SArnd Bergmann 63827b1ea09SChristoph Hellwig spu_release_saved(ctx); 6398b3d6663SArnd Bergmann return ret; 6408b3d6663SArnd Bergmann } 6418b3d6663SArnd Bergmann 6425dfe4c96SArjan van de Ven static const struct file_operations spufs_fpcr_fops = { 6438b3d6663SArnd Bergmann .open = spufs_regs_open, 6448b3d6663SArnd Bergmann .read = spufs_fpcr_read, 6458b3d6663SArnd Bergmann .write = spufs_fpcr_write, 64667207b96SArnd Bergmann .llseek = generic_file_llseek, 64767207b96SArnd Bergmann }; 64867207b96SArnd Bergmann 64967207b96SArnd Bergmann /* generic open function for all pipe-like files */ 65067207b96SArnd Bergmann static int spufs_pipe_open(struct inode *inode, struct file *file) 65167207b96SArnd Bergmann { 65267207b96SArnd Bergmann struct spufs_inode_info *i = SPUFS_I(inode); 65367207b96SArnd Bergmann file->private_data = i->i_ctx; 65467207b96SArnd Bergmann 65567207b96SArnd Bergmann return nonseekable_open(inode, file); 65667207b96SArnd Bergmann } 65767207b96SArnd Bergmann 658cdcc89bbSArnd Bergmann /* 659cdcc89bbSArnd Bergmann * Read as many bytes from the mailbox as possible, until 660cdcc89bbSArnd Bergmann * one of the conditions becomes true: 661cdcc89bbSArnd Bergmann * 662cdcc89bbSArnd Bergmann * - no more data available in the mailbox 663cdcc89bbSArnd Bergmann * - end of the user provided buffer 664cdcc89bbSArnd Bergmann * - end of the mapped area 665cdcc89bbSArnd Bergmann */ 66667207b96SArnd Bergmann static ssize_t spufs_mbox_read(struct file *file, char __user *buf, 66767207b96SArnd Bergmann size_t len, loff_t *pos) 66867207b96SArnd Bergmann { 6698b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 670cdcc89bbSArnd Bergmann u32 mbox_data, __user *udata; 671cdcc89bbSArnd Bergmann ssize_t count; 67267207b96SArnd Bergmann 67367207b96SArnd Bergmann if (len < 4) 67467207b96SArnd Bergmann return -EINVAL; 67567207b96SArnd Bergmann 676cdcc89bbSArnd Bergmann if (!access_ok(VERIFY_WRITE, buf, len)) 67767207b96SArnd Bergmann return -EFAULT; 67867207b96SArnd Bergmann 679cdcc89bbSArnd Bergmann udata = (void __user *)buf; 680cdcc89bbSArnd Bergmann 681c9101bdbSChristoph Hellwig count = spu_acquire(ctx); 682c9101bdbSChristoph Hellwig if (count) 683c9101bdbSChristoph Hellwig return count; 684c9101bdbSChristoph Hellwig 685274cef5eSArnd Bergmann for (count = 0; (count + 4) <= len; count += 4, udata++) { 686cdcc89bbSArnd Bergmann int ret; 687cdcc89bbSArnd Bergmann ret = ctx->ops->mbox_read(ctx, &mbox_data); 688cdcc89bbSArnd Bergmann if (ret == 0) 689cdcc89bbSArnd Bergmann break; 690cdcc89bbSArnd Bergmann 691cdcc89bbSArnd Bergmann /* 692cdcc89bbSArnd Bergmann * at the end of the mapped area, we can fault 693cdcc89bbSArnd Bergmann * but still need to return the data we have 694cdcc89bbSArnd Bergmann * read successfully so far. 695cdcc89bbSArnd Bergmann */ 696cdcc89bbSArnd Bergmann ret = __put_user(mbox_data, udata); 697cdcc89bbSArnd Bergmann if (ret) { 698cdcc89bbSArnd Bergmann if (!count) 699cdcc89bbSArnd Bergmann count = -EFAULT; 700cdcc89bbSArnd Bergmann break; 701cdcc89bbSArnd Bergmann } 702cdcc89bbSArnd Bergmann } 703cdcc89bbSArnd Bergmann spu_release(ctx); 704cdcc89bbSArnd Bergmann 705cdcc89bbSArnd Bergmann if (!count) 706cdcc89bbSArnd Bergmann count = -EAGAIN; 707cdcc89bbSArnd Bergmann 708cdcc89bbSArnd Bergmann return count; 70967207b96SArnd Bergmann } 71067207b96SArnd Bergmann 7115dfe4c96SArjan van de Ven static const struct file_operations spufs_mbox_fops = { 71267207b96SArnd Bergmann .open = spufs_pipe_open, 71367207b96SArnd Bergmann .read = spufs_mbox_read, 71467207b96SArnd Bergmann }; 71567207b96SArnd Bergmann 71667207b96SArnd Bergmann static ssize_t spufs_mbox_stat_read(struct file *file, char __user *buf, 71767207b96SArnd Bergmann size_t len, loff_t *pos) 71867207b96SArnd Bergmann { 7198b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 720c9101bdbSChristoph Hellwig ssize_t ret; 72167207b96SArnd Bergmann u32 mbox_stat; 72267207b96SArnd Bergmann 72367207b96SArnd Bergmann if (len < 4) 72467207b96SArnd Bergmann return -EINVAL; 72567207b96SArnd Bergmann 726c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 727c9101bdbSChristoph Hellwig if (ret) 728c9101bdbSChristoph Hellwig return ret; 7298b3d6663SArnd Bergmann 7308b3d6663SArnd Bergmann mbox_stat = ctx->ops->mbox_stat_read(ctx) & 0xff; 7318b3d6663SArnd Bergmann 7328b3d6663SArnd Bergmann spu_release(ctx); 73367207b96SArnd Bergmann 73467207b96SArnd Bergmann if (copy_to_user(buf, &mbox_stat, sizeof mbox_stat)) 73567207b96SArnd Bergmann return -EFAULT; 73667207b96SArnd Bergmann 73767207b96SArnd Bergmann return 4; 73867207b96SArnd Bergmann } 73967207b96SArnd Bergmann 7405dfe4c96SArjan van de Ven static const struct file_operations spufs_mbox_stat_fops = { 74167207b96SArnd Bergmann .open = spufs_pipe_open, 74267207b96SArnd Bergmann .read = spufs_mbox_stat_read, 74367207b96SArnd Bergmann }; 74467207b96SArnd Bergmann 74567207b96SArnd Bergmann /* low-level ibox access function */ 7468b3d6663SArnd Bergmann size_t spu_ibox_read(struct spu_context *ctx, u32 *data) 74767207b96SArnd Bergmann { 7488b3d6663SArnd Bergmann return ctx->ops->ibox_read(ctx, data); 74967207b96SArnd Bergmann } 75067207b96SArnd Bergmann 75167207b96SArnd Bergmann static int spufs_ibox_fasync(int fd, struct file *file, int on) 75267207b96SArnd Bergmann { 7538b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 7548b3d6663SArnd Bergmann 7558b3d6663SArnd Bergmann return fasync_helper(fd, file, on, &ctx->ibox_fasync); 7568b3d6663SArnd Bergmann } 7578b3d6663SArnd Bergmann 7588b3d6663SArnd Bergmann /* interrupt-level ibox callback function. */ 7598b3d6663SArnd Bergmann void spufs_ibox_callback(struct spu *spu) 7608b3d6663SArnd Bergmann { 7618b3d6663SArnd Bergmann struct spu_context *ctx = spu->ctx; 7628b3d6663SArnd Bergmann 763e65c2f6fSLuke Browning if (!ctx) 764e65c2f6fSLuke Browning return; 765e65c2f6fSLuke Browning 7668b3d6663SArnd Bergmann wake_up_all(&ctx->ibox_wq); 7678b3d6663SArnd Bergmann kill_fasync(&ctx->ibox_fasync, SIGIO, POLLIN); 76867207b96SArnd Bergmann } 76967207b96SArnd Bergmann 770cdcc89bbSArnd Bergmann /* 771cdcc89bbSArnd Bergmann * Read as many bytes from the interrupt mailbox as possible, until 772cdcc89bbSArnd Bergmann * one of the conditions becomes true: 773cdcc89bbSArnd Bergmann * 774cdcc89bbSArnd Bergmann * - no more data available in the mailbox 775cdcc89bbSArnd Bergmann * - end of the user provided buffer 776cdcc89bbSArnd Bergmann * - end of the mapped area 777cdcc89bbSArnd Bergmann * 778cdcc89bbSArnd Bergmann * If the file is opened without O_NONBLOCK, we wait here until 779cdcc89bbSArnd Bergmann * any data is available, but return when we have been able to 780cdcc89bbSArnd Bergmann * read something. 781cdcc89bbSArnd Bergmann */ 78267207b96SArnd Bergmann static ssize_t spufs_ibox_read(struct file *file, char __user *buf, 78367207b96SArnd Bergmann size_t len, loff_t *pos) 78467207b96SArnd Bergmann { 7858b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 786cdcc89bbSArnd Bergmann u32 ibox_data, __user *udata; 787cdcc89bbSArnd Bergmann ssize_t count; 78867207b96SArnd Bergmann 78967207b96SArnd Bergmann if (len < 4) 79067207b96SArnd Bergmann return -EINVAL; 79167207b96SArnd Bergmann 792cdcc89bbSArnd Bergmann if (!access_ok(VERIFY_WRITE, buf, len)) 793cdcc89bbSArnd Bergmann return -EFAULT; 794cdcc89bbSArnd Bergmann 795cdcc89bbSArnd Bergmann udata = (void __user *)buf; 796cdcc89bbSArnd Bergmann 797c9101bdbSChristoph Hellwig count = spu_acquire(ctx); 798c9101bdbSChristoph Hellwig if (count) 799eebead5bSChristoph Hellwig goto out; 80067207b96SArnd Bergmann 801cdcc89bbSArnd Bergmann /* wait only for the first element */ 802cdcc89bbSArnd Bergmann count = 0; 80367207b96SArnd Bergmann if (file->f_flags & O_NONBLOCK) { 804eebead5bSChristoph Hellwig if (!spu_ibox_read(ctx, &ibox_data)) { 805cdcc89bbSArnd Bergmann count = -EAGAIN; 806eebead5bSChristoph Hellwig goto out_unlock; 807eebead5bSChristoph Hellwig } 80867207b96SArnd Bergmann } else { 809cdcc89bbSArnd Bergmann count = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data)); 810cdcc89bbSArnd Bergmann if (count) 811cdcc89bbSArnd Bergmann goto out; 812eebead5bSChristoph Hellwig } 813cdcc89bbSArnd Bergmann 814cdcc89bbSArnd Bergmann /* if we can't write at all, return -EFAULT */ 815cdcc89bbSArnd Bergmann count = __put_user(ibox_data, udata); 816cdcc89bbSArnd Bergmann if (count) 817eebead5bSChristoph Hellwig goto out_unlock; 818cdcc89bbSArnd Bergmann 819cdcc89bbSArnd Bergmann for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) { 820cdcc89bbSArnd Bergmann int ret; 821cdcc89bbSArnd Bergmann ret = ctx->ops->ibox_read(ctx, &ibox_data); 822cdcc89bbSArnd Bergmann if (ret == 0) 823cdcc89bbSArnd Bergmann break; 824cdcc89bbSArnd Bergmann /* 825cdcc89bbSArnd Bergmann * at the end of the mapped area, we can fault 826cdcc89bbSArnd Bergmann * but still need to return the data we have 827cdcc89bbSArnd Bergmann * read successfully so far. 828cdcc89bbSArnd Bergmann */ 829cdcc89bbSArnd Bergmann ret = __put_user(ibox_data, udata); 830cdcc89bbSArnd Bergmann if (ret) 831cdcc89bbSArnd Bergmann break; 83267207b96SArnd Bergmann } 83367207b96SArnd Bergmann 834eebead5bSChristoph Hellwig out_unlock: 8358b3d6663SArnd Bergmann spu_release(ctx); 836eebead5bSChristoph Hellwig out: 837cdcc89bbSArnd Bergmann return count; 83867207b96SArnd Bergmann } 83967207b96SArnd Bergmann 84067207b96SArnd Bergmann static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait) 84167207b96SArnd Bergmann { 8428b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 84367207b96SArnd Bergmann unsigned int mask; 84467207b96SArnd Bergmann 8458b3d6663SArnd Bergmann poll_wait(file, &ctx->ibox_wq, wait); 84667207b96SArnd Bergmann 847c9101bdbSChristoph Hellwig /* 848c9101bdbSChristoph Hellwig * For now keep this uninterruptible and also ignore the rule 849c9101bdbSChristoph Hellwig * that poll should not sleep. Will be fixed later. 850c9101bdbSChristoph Hellwig */ 851c9101bdbSChristoph Hellwig mutex_lock(&ctx->state_mutex); 8523a843d7cSArnd Bergmann mask = ctx->ops->mbox_stat_poll(ctx, POLLIN | POLLRDNORM); 8533a843d7cSArnd Bergmann spu_release(ctx); 85467207b96SArnd Bergmann 85567207b96SArnd Bergmann return mask; 85667207b96SArnd Bergmann } 85767207b96SArnd Bergmann 8585dfe4c96SArjan van de Ven static const struct file_operations spufs_ibox_fops = { 85967207b96SArnd Bergmann .open = spufs_pipe_open, 86067207b96SArnd Bergmann .read = spufs_ibox_read, 86167207b96SArnd Bergmann .poll = spufs_ibox_poll, 86267207b96SArnd Bergmann .fasync = spufs_ibox_fasync, 86367207b96SArnd Bergmann }; 86467207b96SArnd Bergmann 86567207b96SArnd Bergmann static ssize_t spufs_ibox_stat_read(struct file *file, char __user *buf, 86667207b96SArnd Bergmann size_t len, loff_t *pos) 86767207b96SArnd Bergmann { 8688b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 869c9101bdbSChristoph Hellwig ssize_t ret; 87067207b96SArnd Bergmann u32 ibox_stat; 87167207b96SArnd Bergmann 87267207b96SArnd Bergmann if (len < 4) 87367207b96SArnd Bergmann return -EINVAL; 87467207b96SArnd Bergmann 875c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 876c9101bdbSChristoph Hellwig if (ret) 877c9101bdbSChristoph Hellwig return ret; 8788b3d6663SArnd Bergmann ibox_stat = (ctx->ops->mbox_stat_read(ctx) >> 16) & 0xff; 8798b3d6663SArnd Bergmann spu_release(ctx); 88067207b96SArnd Bergmann 88167207b96SArnd Bergmann if (copy_to_user(buf, &ibox_stat, sizeof ibox_stat)) 88267207b96SArnd Bergmann return -EFAULT; 88367207b96SArnd Bergmann 88467207b96SArnd Bergmann return 4; 88567207b96SArnd Bergmann } 88667207b96SArnd Bergmann 8875dfe4c96SArjan van de Ven static const struct file_operations spufs_ibox_stat_fops = { 88867207b96SArnd Bergmann .open = spufs_pipe_open, 88967207b96SArnd Bergmann .read = spufs_ibox_stat_read, 89067207b96SArnd Bergmann }; 89167207b96SArnd Bergmann 89267207b96SArnd Bergmann /* low-level mailbox write */ 8938b3d6663SArnd Bergmann size_t spu_wbox_write(struct spu_context *ctx, u32 data) 89467207b96SArnd Bergmann { 8958b3d6663SArnd Bergmann return ctx->ops->wbox_write(ctx, data); 89667207b96SArnd Bergmann } 89767207b96SArnd Bergmann 89867207b96SArnd Bergmann static int spufs_wbox_fasync(int fd, struct file *file, int on) 89967207b96SArnd Bergmann { 9008b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 9018b3d6663SArnd Bergmann int ret; 9028b3d6663SArnd Bergmann 9038b3d6663SArnd Bergmann ret = fasync_helper(fd, file, on, &ctx->wbox_fasync); 9048b3d6663SArnd Bergmann 9058b3d6663SArnd Bergmann return ret; 9068b3d6663SArnd Bergmann } 9078b3d6663SArnd Bergmann 9088b3d6663SArnd Bergmann /* interrupt-level wbox callback function. */ 9098b3d6663SArnd Bergmann void spufs_wbox_callback(struct spu *spu) 9108b3d6663SArnd Bergmann { 9118b3d6663SArnd Bergmann struct spu_context *ctx = spu->ctx; 9128b3d6663SArnd Bergmann 913e65c2f6fSLuke Browning if (!ctx) 914e65c2f6fSLuke Browning return; 915e65c2f6fSLuke Browning 9168b3d6663SArnd Bergmann wake_up_all(&ctx->wbox_wq); 9178b3d6663SArnd Bergmann kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT); 91867207b96SArnd Bergmann } 91967207b96SArnd Bergmann 920cdcc89bbSArnd Bergmann /* 921cdcc89bbSArnd Bergmann * Write as many bytes to the interrupt mailbox as possible, until 922cdcc89bbSArnd Bergmann * one of the conditions becomes true: 923cdcc89bbSArnd Bergmann * 924cdcc89bbSArnd Bergmann * - the mailbox is full 925cdcc89bbSArnd Bergmann * - end of the user provided buffer 926cdcc89bbSArnd Bergmann * - end of the mapped area 927cdcc89bbSArnd Bergmann * 928cdcc89bbSArnd Bergmann * If the file is opened without O_NONBLOCK, we wait here until 929cdcc89bbSArnd Bergmann * space is availabyl, but return when we have been able to 930cdcc89bbSArnd Bergmann * write something. 931cdcc89bbSArnd Bergmann */ 93267207b96SArnd Bergmann static ssize_t spufs_wbox_write(struct file *file, const char __user *buf, 93367207b96SArnd Bergmann size_t len, loff_t *pos) 93467207b96SArnd Bergmann { 9358b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 936cdcc89bbSArnd Bergmann u32 wbox_data, __user *udata; 937cdcc89bbSArnd Bergmann ssize_t count; 93867207b96SArnd Bergmann 93967207b96SArnd Bergmann if (len < 4) 94067207b96SArnd Bergmann return -EINVAL; 94167207b96SArnd Bergmann 942cdcc89bbSArnd Bergmann udata = (void __user *)buf; 943cdcc89bbSArnd Bergmann if (!access_ok(VERIFY_READ, buf, len)) 944cdcc89bbSArnd Bergmann return -EFAULT; 945cdcc89bbSArnd Bergmann 946cdcc89bbSArnd Bergmann if (__get_user(wbox_data, udata)) 94767207b96SArnd Bergmann return -EFAULT; 94867207b96SArnd Bergmann 949c9101bdbSChristoph Hellwig count = spu_acquire(ctx); 950c9101bdbSChristoph Hellwig if (count) 951eebead5bSChristoph Hellwig goto out; 9528b3d6663SArnd Bergmann 953cdcc89bbSArnd Bergmann /* 954cdcc89bbSArnd Bergmann * make sure we can at least write one element, by waiting 955cdcc89bbSArnd Bergmann * in case of !O_NONBLOCK 956cdcc89bbSArnd Bergmann */ 957cdcc89bbSArnd Bergmann count = 0; 95867207b96SArnd Bergmann if (file->f_flags & O_NONBLOCK) { 959eebead5bSChristoph Hellwig if (!spu_wbox_write(ctx, wbox_data)) { 960cdcc89bbSArnd Bergmann count = -EAGAIN; 961eebead5bSChristoph Hellwig goto out_unlock; 962eebead5bSChristoph Hellwig } 96367207b96SArnd Bergmann } else { 964cdcc89bbSArnd Bergmann count = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data)); 965cdcc89bbSArnd Bergmann if (count) 966cdcc89bbSArnd Bergmann goto out; 967eebead5bSChristoph Hellwig } 968eebead5bSChristoph Hellwig 9698b3d6663SArnd Bergmann 97096de0e25SJan Engelhardt /* write as much as possible */ 971cdcc89bbSArnd Bergmann for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) { 972cdcc89bbSArnd Bergmann int ret; 973cdcc89bbSArnd Bergmann ret = __get_user(wbox_data, udata); 974cdcc89bbSArnd Bergmann if (ret) 975cdcc89bbSArnd Bergmann break; 976cdcc89bbSArnd Bergmann 977cdcc89bbSArnd Bergmann ret = spu_wbox_write(ctx, wbox_data); 978cdcc89bbSArnd Bergmann if (ret == 0) 979cdcc89bbSArnd Bergmann break; 980cdcc89bbSArnd Bergmann } 981cdcc89bbSArnd Bergmann 982eebead5bSChristoph Hellwig out_unlock: 983cdcc89bbSArnd Bergmann spu_release(ctx); 984eebead5bSChristoph Hellwig out: 985cdcc89bbSArnd Bergmann return count; 98667207b96SArnd Bergmann } 98767207b96SArnd Bergmann 98867207b96SArnd Bergmann static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait) 98967207b96SArnd Bergmann { 9908b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 99167207b96SArnd Bergmann unsigned int mask; 99267207b96SArnd Bergmann 9938b3d6663SArnd Bergmann poll_wait(file, &ctx->wbox_wq, wait); 99467207b96SArnd Bergmann 995c9101bdbSChristoph Hellwig /* 996c9101bdbSChristoph Hellwig * For now keep this uninterruptible and also ignore the rule 997c9101bdbSChristoph Hellwig * that poll should not sleep. Will be fixed later. 998c9101bdbSChristoph Hellwig */ 999c9101bdbSChristoph Hellwig mutex_lock(&ctx->state_mutex); 10003a843d7cSArnd Bergmann mask = ctx->ops->mbox_stat_poll(ctx, POLLOUT | POLLWRNORM); 10013a843d7cSArnd Bergmann spu_release(ctx); 100267207b96SArnd Bergmann 100367207b96SArnd Bergmann return mask; 100467207b96SArnd Bergmann } 100567207b96SArnd Bergmann 10065dfe4c96SArjan van de Ven static const struct file_operations spufs_wbox_fops = { 100767207b96SArnd Bergmann .open = spufs_pipe_open, 100867207b96SArnd Bergmann .write = spufs_wbox_write, 100967207b96SArnd Bergmann .poll = spufs_wbox_poll, 101067207b96SArnd Bergmann .fasync = spufs_wbox_fasync, 101167207b96SArnd Bergmann }; 101267207b96SArnd Bergmann 101367207b96SArnd Bergmann static ssize_t spufs_wbox_stat_read(struct file *file, char __user *buf, 101467207b96SArnd Bergmann size_t len, loff_t *pos) 101567207b96SArnd Bergmann { 10168b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 1017c9101bdbSChristoph Hellwig ssize_t ret; 101867207b96SArnd Bergmann u32 wbox_stat; 101967207b96SArnd Bergmann 102067207b96SArnd Bergmann if (len < 4) 102167207b96SArnd Bergmann return -EINVAL; 102267207b96SArnd Bergmann 1023c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1024c9101bdbSChristoph Hellwig if (ret) 1025c9101bdbSChristoph Hellwig return ret; 10268b3d6663SArnd Bergmann wbox_stat = (ctx->ops->mbox_stat_read(ctx) >> 8) & 0xff; 10278b3d6663SArnd Bergmann spu_release(ctx); 102867207b96SArnd Bergmann 102967207b96SArnd Bergmann if (copy_to_user(buf, &wbox_stat, sizeof wbox_stat)) 103067207b96SArnd Bergmann return -EFAULT; 103167207b96SArnd Bergmann 103267207b96SArnd Bergmann return 4; 103367207b96SArnd Bergmann } 103467207b96SArnd Bergmann 10355dfe4c96SArjan van de Ven static const struct file_operations spufs_wbox_stat_fops = { 103667207b96SArnd Bergmann .open = spufs_pipe_open, 103767207b96SArnd Bergmann .read = spufs_wbox_stat_read, 103867207b96SArnd Bergmann }; 103967207b96SArnd Bergmann 10406df10a82SMark Nutter static int spufs_signal1_open(struct inode *inode, struct file *file) 10416df10a82SMark Nutter { 10426df10a82SMark Nutter struct spufs_inode_info *i = SPUFS_I(inode); 10436df10a82SMark Nutter struct spu_context *ctx = i->i_ctx; 104443c2bbd9SChristoph Hellwig 104547d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 10466df10a82SMark Nutter file->private_data = ctx; 104743c2bbd9SChristoph Hellwig if (!i->i_openers++) 10486df10a82SMark Nutter ctx->signal1 = inode->i_mapping; 104947d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 10506df10a82SMark Nutter return nonseekable_open(inode, file); 10516df10a82SMark Nutter } 10526df10a82SMark Nutter 105343c2bbd9SChristoph Hellwig static int 105443c2bbd9SChristoph Hellwig spufs_signal1_release(struct inode *inode, struct file *file) 105543c2bbd9SChristoph Hellwig { 105643c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 105743c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 105843c2bbd9SChristoph Hellwig 105947d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 106043c2bbd9SChristoph Hellwig if (!--i->i_openers) 106143c2bbd9SChristoph Hellwig ctx->signal1 = NULL; 106247d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 106343c2bbd9SChristoph Hellwig return 0; 106443c2bbd9SChristoph Hellwig } 106543c2bbd9SChristoph Hellwig 1066bf1ab978SDwayne Grant McConnell static ssize_t __spufs_signal1_read(struct spu_context *ctx, char __user *buf, 106767207b96SArnd Bergmann size_t len, loff_t *pos) 106867207b96SArnd Bergmann { 106917f88cebSDwayne Grant McConnell int ret = 0; 107067207b96SArnd Bergmann u32 data; 107167207b96SArnd Bergmann 107267207b96SArnd Bergmann if (len < 4) 107367207b96SArnd Bergmann return -EINVAL; 107467207b96SArnd Bergmann 107517f88cebSDwayne Grant McConnell if (ctx->csa.spu_chnlcnt_RW[3]) { 107617f88cebSDwayne Grant McConnell data = ctx->csa.spu_chnldata_RW[3]; 107717f88cebSDwayne Grant McConnell ret = 4; 107817f88cebSDwayne Grant McConnell } 10798b3d6663SArnd Bergmann 108017f88cebSDwayne Grant McConnell if (!ret) 108117f88cebSDwayne Grant McConnell goto out; 108217f88cebSDwayne Grant McConnell 108367207b96SArnd Bergmann if (copy_to_user(buf, &data, 4)) 108467207b96SArnd Bergmann return -EFAULT; 108567207b96SArnd Bergmann 108617f88cebSDwayne Grant McConnell out: 108717f88cebSDwayne Grant McConnell return ret; 108867207b96SArnd Bergmann } 108967207b96SArnd Bergmann 1090bf1ab978SDwayne Grant McConnell static ssize_t spufs_signal1_read(struct file *file, char __user *buf, 1091bf1ab978SDwayne Grant McConnell size_t len, loff_t *pos) 1092bf1ab978SDwayne Grant McConnell { 1093bf1ab978SDwayne Grant McConnell int ret; 1094bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 1095bf1ab978SDwayne Grant McConnell 1096c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 1097c9101bdbSChristoph Hellwig if (ret) 1098c9101bdbSChristoph Hellwig return ret; 1099bf1ab978SDwayne Grant McConnell ret = __spufs_signal1_read(ctx, buf, len, pos); 110027b1ea09SChristoph Hellwig spu_release_saved(ctx); 1101bf1ab978SDwayne Grant McConnell 1102bf1ab978SDwayne Grant McConnell return ret; 1103bf1ab978SDwayne Grant McConnell } 1104bf1ab978SDwayne Grant McConnell 110567207b96SArnd Bergmann static ssize_t spufs_signal1_write(struct file *file, const char __user *buf, 110667207b96SArnd Bergmann size_t len, loff_t *pos) 110767207b96SArnd Bergmann { 110867207b96SArnd Bergmann struct spu_context *ctx; 1109c9101bdbSChristoph Hellwig ssize_t ret; 111067207b96SArnd Bergmann u32 data; 111167207b96SArnd Bergmann 111267207b96SArnd Bergmann ctx = file->private_data; 111367207b96SArnd Bergmann 111467207b96SArnd Bergmann if (len < 4) 111567207b96SArnd Bergmann return -EINVAL; 111667207b96SArnd Bergmann 111767207b96SArnd Bergmann if (copy_from_user(&data, buf, 4)) 111867207b96SArnd Bergmann return -EFAULT; 111967207b96SArnd Bergmann 1120c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1121c9101bdbSChristoph Hellwig if (ret) 1122c9101bdbSChristoph Hellwig return ret; 11238b3d6663SArnd Bergmann ctx->ops->signal1_write(ctx, data); 11248b3d6663SArnd Bergmann spu_release(ctx); 112567207b96SArnd Bergmann 112667207b96SArnd Bergmann return 4; 112767207b96SArnd Bergmann } 112867207b96SArnd Bergmann 1129b1e2270fSNick Piggin static int 1130b1e2270fSNick Piggin spufs_signal1_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 11316df10a82SMark Nutter { 113287ff6090SJeremy Kerr #if SPUFS_SIGNAL_MAP_SIZE == 0x1000 113387ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x14000, SPUFS_SIGNAL_MAP_SIZE); 113487ff6090SJeremy Kerr #elif SPUFS_SIGNAL_MAP_SIZE == 0x10000 113527d5bf2aSBenjamin Herrenschmidt /* For 64k pages, both signal1 and signal2 can be used to mmap the whole 113627d5bf2aSBenjamin Herrenschmidt * signal 1 and 2 area 113727d5bf2aSBenjamin Herrenschmidt */ 113887ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x10000, SPUFS_SIGNAL_MAP_SIZE); 113927d5bf2aSBenjamin Herrenschmidt #else 114027d5bf2aSBenjamin Herrenschmidt #error unsupported page size 114127d5bf2aSBenjamin Herrenschmidt #endif 11426df10a82SMark Nutter } 11436df10a82SMark Nutter 11446df10a82SMark Nutter static struct vm_operations_struct spufs_signal1_mmap_vmops = { 1145b1e2270fSNick Piggin .fault = spufs_signal1_mmap_fault, 11466df10a82SMark Nutter }; 11476df10a82SMark Nutter 11486df10a82SMark Nutter static int spufs_signal1_mmap(struct file *file, struct vm_area_struct *vma) 11496df10a82SMark Nutter { 11506df10a82SMark Nutter if (!(vma->vm_flags & VM_SHARED)) 11516df10a82SMark Nutter return -EINVAL; 11526df10a82SMark Nutter 115378bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 115464b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 11556df10a82SMark Nutter 11566df10a82SMark Nutter vma->vm_ops = &spufs_signal1_mmap_vmops; 11576df10a82SMark Nutter return 0; 11586df10a82SMark Nutter } 11596df10a82SMark Nutter 11605dfe4c96SArjan van de Ven static const struct file_operations spufs_signal1_fops = { 11616df10a82SMark Nutter .open = spufs_signal1_open, 116243c2bbd9SChristoph Hellwig .release = spufs_signal1_release, 116367207b96SArnd Bergmann .read = spufs_signal1_read, 116467207b96SArnd Bergmann .write = spufs_signal1_write, 11656df10a82SMark Nutter .mmap = spufs_signal1_mmap, 116667207b96SArnd Bergmann }; 116767207b96SArnd Bergmann 1168d054b36fSJeremy Kerr static const struct file_operations spufs_signal1_nosched_fops = { 1169d054b36fSJeremy Kerr .open = spufs_signal1_open, 1170d054b36fSJeremy Kerr .release = spufs_signal1_release, 1171d054b36fSJeremy Kerr .write = spufs_signal1_write, 1172d054b36fSJeremy Kerr .mmap = spufs_signal1_mmap, 1173d054b36fSJeremy Kerr }; 1174d054b36fSJeremy Kerr 11756df10a82SMark Nutter static int spufs_signal2_open(struct inode *inode, struct file *file) 11766df10a82SMark Nutter { 11776df10a82SMark Nutter struct spufs_inode_info *i = SPUFS_I(inode); 11786df10a82SMark Nutter struct spu_context *ctx = i->i_ctx; 117943c2bbd9SChristoph Hellwig 118047d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 11816df10a82SMark Nutter file->private_data = ctx; 118243c2bbd9SChristoph Hellwig if (!i->i_openers++) 11836df10a82SMark Nutter ctx->signal2 = inode->i_mapping; 118447d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 11856df10a82SMark Nutter return nonseekable_open(inode, file); 11866df10a82SMark Nutter } 11876df10a82SMark Nutter 118843c2bbd9SChristoph Hellwig static int 118943c2bbd9SChristoph Hellwig spufs_signal2_release(struct inode *inode, struct file *file) 119043c2bbd9SChristoph Hellwig { 119143c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 119243c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 119343c2bbd9SChristoph Hellwig 119447d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 119543c2bbd9SChristoph Hellwig if (!--i->i_openers) 119643c2bbd9SChristoph Hellwig ctx->signal2 = NULL; 119747d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 119843c2bbd9SChristoph Hellwig return 0; 119943c2bbd9SChristoph Hellwig } 120043c2bbd9SChristoph Hellwig 1201bf1ab978SDwayne Grant McConnell static ssize_t __spufs_signal2_read(struct spu_context *ctx, char __user *buf, 120267207b96SArnd Bergmann size_t len, loff_t *pos) 120367207b96SArnd Bergmann { 120417f88cebSDwayne Grant McConnell int ret = 0; 120567207b96SArnd Bergmann u32 data; 120667207b96SArnd Bergmann 120767207b96SArnd Bergmann if (len < 4) 120867207b96SArnd Bergmann return -EINVAL; 120967207b96SArnd Bergmann 121017f88cebSDwayne Grant McConnell if (ctx->csa.spu_chnlcnt_RW[4]) { 121117f88cebSDwayne Grant McConnell data = ctx->csa.spu_chnldata_RW[4]; 121217f88cebSDwayne Grant McConnell ret = 4; 121317f88cebSDwayne Grant McConnell } 12148b3d6663SArnd Bergmann 121517f88cebSDwayne Grant McConnell if (!ret) 121617f88cebSDwayne Grant McConnell goto out; 121717f88cebSDwayne Grant McConnell 121867207b96SArnd Bergmann if (copy_to_user(buf, &data, 4)) 121967207b96SArnd Bergmann return -EFAULT; 122067207b96SArnd Bergmann 122117f88cebSDwayne Grant McConnell out: 1222bf1ab978SDwayne Grant McConnell return ret; 1223bf1ab978SDwayne Grant McConnell } 1224bf1ab978SDwayne Grant McConnell 1225bf1ab978SDwayne Grant McConnell static ssize_t spufs_signal2_read(struct file *file, char __user *buf, 1226bf1ab978SDwayne Grant McConnell size_t len, loff_t *pos) 1227bf1ab978SDwayne Grant McConnell { 1228bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 1229bf1ab978SDwayne Grant McConnell int ret; 1230bf1ab978SDwayne Grant McConnell 1231c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 1232c9101bdbSChristoph Hellwig if (ret) 1233c9101bdbSChristoph Hellwig return ret; 1234bf1ab978SDwayne Grant McConnell ret = __spufs_signal2_read(ctx, buf, len, pos); 123527b1ea09SChristoph Hellwig spu_release_saved(ctx); 1236bf1ab978SDwayne Grant McConnell 1237bf1ab978SDwayne Grant McConnell return ret; 123867207b96SArnd Bergmann } 123967207b96SArnd Bergmann 124067207b96SArnd Bergmann static ssize_t spufs_signal2_write(struct file *file, const char __user *buf, 124167207b96SArnd Bergmann size_t len, loff_t *pos) 124267207b96SArnd Bergmann { 124367207b96SArnd Bergmann struct spu_context *ctx; 1244c9101bdbSChristoph Hellwig ssize_t ret; 124567207b96SArnd Bergmann u32 data; 124667207b96SArnd Bergmann 124767207b96SArnd Bergmann ctx = file->private_data; 124867207b96SArnd Bergmann 124967207b96SArnd Bergmann if (len < 4) 125067207b96SArnd Bergmann return -EINVAL; 125167207b96SArnd Bergmann 125267207b96SArnd Bergmann if (copy_from_user(&data, buf, 4)) 125367207b96SArnd Bergmann return -EFAULT; 125467207b96SArnd Bergmann 1255c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1256c9101bdbSChristoph Hellwig if (ret) 1257c9101bdbSChristoph Hellwig return ret; 12588b3d6663SArnd Bergmann ctx->ops->signal2_write(ctx, data); 12598b3d6663SArnd Bergmann spu_release(ctx); 126067207b96SArnd Bergmann 126167207b96SArnd Bergmann return 4; 126267207b96SArnd Bergmann } 126367207b96SArnd Bergmann 126427d5bf2aSBenjamin Herrenschmidt #if SPUFS_MMAP_4K 1265b1e2270fSNick Piggin static int 1266b1e2270fSNick Piggin spufs_signal2_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 12676df10a82SMark Nutter { 126887ff6090SJeremy Kerr #if SPUFS_SIGNAL_MAP_SIZE == 0x1000 126987ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x1c000, SPUFS_SIGNAL_MAP_SIZE); 127087ff6090SJeremy Kerr #elif SPUFS_SIGNAL_MAP_SIZE == 0x10000 127127d5bf2aSBenjamin Herrenschmidt /* For 64k pages, both signal1 and signal2 can be used to mmap the whole 127227d5bf2aSBenjamin Herrenschmidt * signal 1 and 2 area 127327d5bf2aSBenjamin Herrenschmidt */ 127487ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x10000, SPUFS_SIGNAL_MAP_SIZE); 127527d5bf2aSBenjamin Herrenschmidt #else 127627d5bf2aSBenjamin Herrenschmidt #error unsupported page size 127727d5bf2aSBenjamin Herrenschmidt #endif 12786df10a82SMark Nutter } 12796df10a82SMark Nutter 12806df10a82SMark Nutter static struct vm_operations_struct spufs_signal2_mmap_vmops = { 1281b1e2270fSNick Piggin .fault = spufs_signal2_mmap_fault, 12826df10a82SMark Nutter }; 12836df10a82SMark Nutter 12846df10a82SMark Nutter static int spufs_signal2_mmap(struct file *file, struct vm_area_struct *vma) 12856df10a82SMark Nutter { 12866df10a82SMark Nutter if (!(vma->vm_flags & VM_SHARED)) 12876df10a82SMark Nutter return -EINVAL; 12886df10a82SMark Nutter 128978bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 129064b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 12916df10a82SMark Nutter 12926df10a82SMark Nutter vma->vm_ops = &spufs_signal2_mmap_vmops; 12936df10a82SMark Nutter return 0; 12946df10a82SMark Nutter } 129527d5bf2aSBenjamin Herrenschmidt #else /* SPUFS_MMAP_4K */ 129627d5bf2aSBenjamin Herrenschmidt #define spufs_signal2_mmap NULL 129727d5bf2aSBenjamin Herrenschmidt #endif /* !SPUFS_MMAP_4K */ 12986df10a82SMark Nutter 12995dfe4c96SArjan van de Ven static const struct file_operations spufs_signal2_fops = { 13006df10a82SMark Nutter .open = spufs_signal2_open, 130143c2bbd9SChristoph Hellwig .release = spufs_signal2_release, 130267207b96SArnd Bergmann .read = spufs_signal2_read, 130367207b96SArnd Bergmann .write = spufs_signal2_write, 13046df10a82SMark Nutter .mmap = spufs_signal2_mmap, 130567207b96SArnd Bergmann }; 130667207b96SArnd Bergmann 1307d054b36fSJeremy Kerr static const struct file_operations spufs_signal2_nosched_fops = { 1308d054b36fSJeremy Kerr .open = spufs_signal2_open, 1309d054b36fSJeremy Kerr .release = spufs_signal2_release, 1310d054b36fSJeremy Kerr .write = spufs_signal2_write, 1311d054b36fSJeremy Kerr .mmap = spufs_signal2_mmap, 1312d054b36fSJeremy Kerr }; 1313d054b36fSJeremy Kerr 1314104f0cc2SMichael Ellerman /* 1315104f0cc2SMichael Ellerman * This is a wrapper around DEFINE_SIMPLE_ATTRIBUTE which does the 1316104f0cc2SMichael Ellerman * work of acquiring (or not) the SPU context before calling through 1317104f0cc2SMichael Ellerman * to the actual get routine. The set routine is called directly. 1318104f0cc2SMichael Ellerman */ 1319104f0cc2SMichael Ellerman #define SPU_ATTR_NOACQUIRE 0 1320104f0cc2SMichael Ellerman #define SPU_ATTR_ACQUIRE 1 1321104f0cc2SMichael Ellerman #define SPU_ATTR_ACQUIRE_SAVED 2 1322104f0cc2SMichael Ellerman 1323104f0cc2SMichael Ellerman #define DEFINE_SPUFS_ATTRIBUTE(__name, __get, __set, __fmt, __acquire) \ 1324197b1a82SChristoph Hellwig static int __##__get(void *data, u64 *val) \ 1325104f0cc2SMichael Ellerman { \ 1326104f0cc2SMichael Ellerman struct spu_context *ctx = data; \ 1327c9101bdbSChristoph Hellwig int ret = 0; \ 1328104f0cc2SMichael Ellerman \ 1329104f0cc2SMichael Ellerman if (__acquire == SPU_ATTR_ACQUIRE) { \ 1330c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); \ 1331c9101bdbSChristoph Hellwig if (ret) \ 1332c9101bdbSChristoph Hellwig return ret; \ 1333197b1a82SChristoph Hellwig *val = __get(ctx); \ 1334104f0cc2SMichael Ellerman spu_release(ctx); \ 1335104f0cc2SMichael Ellerman } else if (__acquire == SPU_ATTR_ACQUIRE_SAVED) { \ 1336c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); \ 1337c9101bdbSChristoph Hellwig if (ret) \ 1338c9101bdbSChristoph Hellwig return ret; \ 1339197b1a82SChristoph Hellwig *val = __get(ctx); \ 1340104f0cc2SMichael Ellerman spu_release_saved(ctx); \ 1341104f0cc2SMichael Ellerman } else \ 1342197b1a82SChristoph Hellwig *val = __get(ctx); \ 1343104f0cc2SMichael Ellerman \ 1344197b1a82SChristoph Hellwig return 0; \ 1345104f0cc2SMichael Ellerman } \ 1346197b1a82SChristoph Hellwig DEFINE_SPUFS_SIMPLE_ATTRIBUTE(__name, __##__get, __set, __fmt); 1347104f0cc2SMichael Ellerman 1348197b1a82SChristoph Hellwig static int spufs_signal1_type_set(void *data, u64 val) 134967207b96SArnd Bergmann { 135067207b96SArnd Bergmann struct spu_context *ctx = data; 1351c9101bdbSChristoph Hellwig int ret; 135267207b96SArnd Bergmann 1353c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1354c9101bdbSChristoph Hellwig if (ret) 1355c9101bdbSChristoph Hellwig return ret; 13568b3d6663SArnd Bergmann ctx->ops->signal1_type_set(ctx, val); 13578b3d6663SArnd Bergmann spu_release(ctx); 1358197b1a82SChristoph Hellwig 1359197b1a82SChristoph Hellwig return 0; 136067207b96SArnd Bergmann } 136167207b96SArnd Bergmann 1362104f0cc2SMichael Ellerman static u64 spufs_signal1_type_get(struct spu_context *ctx) 1363bf1ab978SDwayne Grant McConnell { 1364bf1ab978SDwayne Grant McConnell return ctx->ops->signal1_type_get(ctx); 1365bf1ab978SDwayne Grant McConnell } 1366104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_signal1_type, spufs_signal1_type_get, 1367af8b44e0SJeremy Kerr spufs_signal1_type_set, "%llu\n", SPU_ATTR_ACQUIRE); 1368bf1ab978SDwayne Grant McConnell 136967207b96SArnd Bergmann 1370197b1a82SChristoph Hellwig static int spufs_signal2_type_set(void *data, u64 val) 137167207b96SArnd Bergmann { 137267207b96SArnd Bergmann struct spu_context *ctx = data; 1373c9101bdbSChristoph Hellwig int ret; 137467207b96SArnd Bergmann 1375c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1376c9101bdbSChristoph Hellwig if (ret) 1377c9101bdbSChristoph Hellwig return ret; 13788b3d6663SArnd Bergmann ctx->ops->signal2_type_set(ctx, val); 13798b3d6663SArnd Bergmann spu_release(ctx); 1380197b1a82SChristoph Hellwig 1381197b1a82SChristoph Hellwig return 0; 138267207b96SArnd Bergmann } 138367207b96SArnd Bergmann 1384104f0cc2SMichael Ellerman static u64 spufs_signal2_type_get(struct spu_context *ctx) 1385bf1ab978SDwayne Grant McConnell { 1386bf1ab978SDwayne Grant McConnell return ctx->ops->signal2_type_get(ctx); 1387bf1ab978SDwayne Grant McConnell } 1388104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get, 1389af8b44e0SJeremy Kerr spufs_signal2_type_set, "%llu\n", SPU_ATTR_ACQUIRE); 139067207b96SArnd Bergmann 139127d5bf2aSBenjamin Herrenschmidt #if SPUFS_MMAP_4K 1392b1e2270fSNick Piggin static int 1393b1e2270fSNick Piggin spufs_mss_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 1394d9379c4bSarnd@arndb.de { 139587ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x0000, SPUFS_MSS_MAP_SIZE); 1396d9379c4bSarnd@arndb.de } 1397d9379c4bSarnd@arndb.de 1398d9379c4bSarnd@arndb.de static struct vm_operations_struct spufs_mss_mmap_vmops = { 1399b1e2270fSNick Piggin .fault = spufs_mss_mmap_fault, 1400d9379c4bSarnd@arndb.de }; 1401d9379c4bSarnd@arndb.de 1402d9379c4bSarnd@arndb.de /* 1403d9379c4bSarnd@arndb.de * mmap support for problem state MFC DMA area [0x0000 - 0x0fff]. 1404d9379c4bSarnd@arndb.de */ 1405d9379c4bSarnd@arndb.de static int spufs_mss_mmap(struct file *file, struct vm_area_struct *vma) 1406d9379c4bSarnd@arndb.de { 1407d9379c4bSarnd@arndb.de if (!(vma->vm_flags & VM_SHARED)) 1408d9379c4bSarnd@arndb.de return -EINVAL; 1409d9379c4bSarnd@arndb.de 141078bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 141164b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 1412d9379c4bSarnd@arndb.de 1413d9379c4bSarnd@arndb.de vma->vm_ops = &spufs_mss_mmap_vmops; 1414d9379c4bSarnd@arndb.de return 0; 1415d9379c4bSarnd@arndb.de } 141627d5bf2aSBenjamin Herrenschmidt #else /* SPUFS_MMAP_4K */ 141727d5bf2aSBenjamin Herrenschmidt #define spufs_mss_mmap NULL 141827d5bf2aSBenjamin Herrenschmidt #endif /* !SPUFS_MMAP_4K */ 1419d9379c4bSarnd@arndb.de 1420d9379c4bSarnd@arndb.de static int spufs_mss_open(struct inode *inode, struct file *file) 1421d9379c4bSarnd@arndb.de { 1422d9379c4bSarnd@arndb.de struct spufs_inode_info *i = SPUFS_I(inode); 142317e0e270SBenjamin Herrenschmidt struct spu_context *ctx = i->i_ctx; 1424d9379c4bSarnd@arndb.de 1425d9379c4bSarnd@arndb.de file->private_data = i->i_ctx; 142643c2bbd9SChristoph Hellwig 142747d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 142843c2bbd9SChristoph Hellwig if (!i->i_openers++) 142917e0e270SBenjamin Herrenschmidt ctx->mss = inode->i_mapping; 143047d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 1431d9379c4bSarnd@arndb.de return nonseekable_open(inode, file); 1432d9379c4bSarnd@arndb.de } 1433d9379c4bSarnd@arndb.de 143443c2bbd9SChristoph Hellwig static int 143543c2bbd9SChristoph Hellwig spufs_mss_release(struct inode *inode, struct file *file) 143643c2bbd9SChristoph Hellwig { 143743c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 143843c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 143943c2bbd9SChristoph Hellwig 144047d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 144143c2bbd9SChristoph Hellwig if (!--i->i_openers) 144243c2bbd9SChristoph Hellwig ctx->mss = NULL; 144347d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 144443c2bbd9SChristoph Hellwig return 0; 144543c2bbd9SChristoph Hellwig } 144643c2bbd9SChristoph Hellwig 14475dfe4c96SArjan van de Ven static const struct file_operations spufs_mss_fops = { 1448d9379c4bSarnd@arndb.de .open = spufs_mss_open, 144943c2bbd9SChristoph Hellwig .release = spufs_mss_release, 1450d9379c4bSarnd@arndb.de .mmap = spufs_mss_mmap, 145127d5bf2aSBenjamin Herrenschmidt }; 145227d5bf2aSBenjamin Herrenschmidt 1453b1e2270fSNick Piggin static int 1454b1e2270fSNick Piggin spufs_psmap_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 145527d5bf2aSBenjamin Herrenschmidt { 145687ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x0000, SPUFS_PS_MAP_SIZE); 145727d5bf2aSBenjamin Herrenschmidt } 145827d5bf2aSBenjamin Herrenschmidt 145927d5bf2aSBenjamin Herrenschmidt static struct vm_operations_struct spufs_psmap_mmap_vmops = { 1460b1e2270fSNick Piggin .fault = spufs_psmap_mmap_fault, 146127d5bf2aSBenjamin Herrenschmidt }; 146227d5bf2aSBenjamin Herrenschmidt 146327d5bf2aSBenjamin Herrenschmidt /* 146427d5bf2aSBenjamin Herrenschmidt * mmap support for full problem state area [0x00000 - 0x1ffff]. 146527d5bf2aSBenjamin Herrenschmidt */ 146627d5bf2aSBenjamin Herrenschmidt static int spufs_psmap_mmap(struct file *file, struct vm_area_struct *vma) 146727d5bf2aSBenjamin Herrenschmidt { 146827d5bf2aSBenjamin Herrenschmidt if (!(vma->vm_flags & VM_SHARED)) 146927d5bf2aSBenjamin Herrenschmidt return -EINVAL; 147027d5bf2aSBenjamin Herrenschmidt 147178bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 147264b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 147327d5bf2aSBenjamin Herrenschmidt 147427d5bf2aSBenjamin Herrenschmidt vma->vm_ops = &spufs_psmap_mmap_vmops; 147527d5bf2aSBenjamin Herrenschmidt return 0; 147627d5bf2aSBenjamin Herrenschmidt } 147727d5bf2aSBenjamin Herrenschmidt 147827d5bf2aSBenjamin Herrenschmidt static int spufs_psmap_open(struct inode *inode, struct file *file) 147927d5bf2aSBenjamin Herrenschmidt { 148027d5bf2aSBenjamin Herrenschmidt struct spufs_inode_info *i = SPUFS_I(inode); 148117e0e270SBenjamin Herrenschmidt struct spu_context *ctx = i->i_ctx; 148227d5bf2aSBenjamin Herrenschmidt 148347d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 148427d5bf2aSBenjamin Herrenschmidt file->private_data = i->i_ctx; 148543c2bbd9SChristoph Hellwig if (!i->i_openers++) 148617e0e270SBenjamin Herrenschmidt ctx->psmap = inode->i_mapping; 148747d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 148827d5bf2aSBenjamin Herrenschmidt return nonseekable_open(inode, file); 148927d5bf2aSBenjamin Herrenschmidt } 149027d5bf2aSBenjamin Herrenschmidt 149143c2bbd9SChristoph Hellwig static int 149243c2bbd9SChristoph Hellwig spufs_psmap_release(struct inode *inode, struct file *file) 149343c2bbd9SChristoph Hellwig { 149443c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 149543c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 149643c2bbd9SChristoph Hellwig 149747d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 149843c2bbd9SChristoph Hellwig if (!--i->i_openers) 149943c2bbd9SChristoph Hellwig ctx->psmap = NULL; 150047d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 150143c2bbd9SChristoph Hellwig return 0; 150243c2bbd9SChristoph Hellwig } 150343c2bbd9SChristoph Hellwig 15045dfe4c96SArjan van de Ven static const struct file_operations spufs_psmap_fops = { 150527d5bf2aSBenjamin Herrenschmidt .open = spufs_psmap_open, 150643c2bbd9SChristoph Hellwig .release = spufs_psmap_release, 150727d5bf2aSBenjamin Herrenschmidt .mmap = spufs_psmap_mmap, 1508d9379c4bSarnd@arndb.de }; 1509d9379c4bSarnd@arndb.de 1510d9379c4bSarnd@arndb.de 151127d5bf2aSBenjamin Herrenschmidt #if SPUFS_MMAP_4K 1512b1e2270fSNick Piggin static int 1513b1e2270fSNick Piggin spufs_mfc_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 15146df10a82SMark Nutter { 151587ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x3000, SPUFS_MFC_MAP_SIZE); 15166df10a82SMark Nutter } 15176df10a82SMark Nutter 15186df10a82SMark Nutter static struct vm_operations_struct spufs_mfc_mmap_vmops = { 1519b1e2270fSNick Piggin .fault = spufs_mfc_mmap_fault, 15206df10a82SMark Nutter }; 15216df10a82SMark Nutter 15226df10a82SMark Nutter /* 15236df10a82SMark Nutter * mmap support for problem state MFC DMA area [0x0000 - 0x0fff]. 15246df10a82SMark Nutter */ 15256df10a82SMark Nutter static int spufs_mfc_mmap(struct file *file, struct vm_area_struct *vma) 15266df10a82SMark Nutter { 15276df10a82SMark Nutter if (!(vma->vm_flags & VM_SHARED)) 15286df10a82SMark Nutter return -EINVAL; 15296df10a82SMark Nutter 153078bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 153164b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 15326df10a82SMark Nutter 15336df10a82SMark Nutter vma->vm_ops = &spufs_mfc_mmap_vmops; 15346df10a82SMark Nutter return 0; 15356df10a82SMark Nutter } 153627d5bf2aSBenjamin Herrenschmidt #else /* SPUFS_MMAP_4K */ 153727d5bf2aSBenjamin Herrenschmidt #define spufs_mfc_mmap NULL 153827d5bf2aSBenjamin Herrenschmidt #endif /* !SPUFS_MMAP_4K */ 1539a33a7d73SArnd Bergmann 1540a33a7d73SArnd Bergmann static int spufs_mfc_open(struct inode *inode, struct file *file) 1541a33a7d73SArnd Bergmann { 1542a33a7d73SArnd Bergmann struct spufs_inode_info *i = SPUFS_I(inode); 1543a33a7d73SArnd Bergmann struct spu_context *ctx = i->i_ctx; 1544a33a7d73SArnd Bergmann 1545a33a7d73SArnd Bergmann /* we don't want to deal with DMA into other processes */ 1546a33a7d73SArnd Bergmann if (ctx->owner != current->mm) 1547a33a7d73SArnd Bergmann return -EINVAL; 1548a33a7d73SArnd Bergmann 1549a33a7d73SArnd Bergmann if (atomic_read(&inode->i_count) != 1) 1550a33a7d73SArnd Bergmann return -EBUSY; 1551a33a7d73SArnd Bergmann 155247d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 1553a33a7d73SArnd Bergmann file->private_data = ctx; 155443c2bbd9SChristoph Hellwig if (!i->i_openers++) 155517e0e270SBenjamin Herrenschmidt ctx->mfc = inode->i_mapping; 155647d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 1557a33a7d73SArnd Bergmann return nonseekable_open(inode, file); 1558a33a7d73SArnd Bergmann } 1559a33a7d73SArnd Bergmann 156043c2bbd9SChristoph Hellwig static int 156143c2bbd9SChristoph Hellwig spufs_mfc_release(struct inode *inode, struct file *file) 156243c2bbd9SChristoph Hellwig { 156343c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 156443c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 156543c2bbd9SChristoph Hellwig 156647d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 156743c2bbd9SChristoph Hellwig if (!--i->i_openers) 156843c2bbd9SChristoph Hellwig ctx->mfc = NULL; 156947d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 157043c2bbd9SChristoph Hellwig return 0; 157143c2bbd9SChristoph Hellwig } 157243c2bbd9SChristoph Hellwig 1573a33a7d73SArnd Bergmann /* interrupt-level mfc callback function. */ 1574a33a7d73SArnd Bergmann void spufs_mfc_callback(struct spu *spu) 1575a33a7d73SArnd Bergmann { 1576a33a7d73SArnd Bergmann struct spu_context *ctx = spu->ctx; 1577a33a7d73SArnd Bergmann 1578e65c2f6fSLuke Browning if (!ctx) 1579e65c2f6fSLuke Browning return; 1580e65c2f6fSLuke Browning 1581a33a7d73SArnd Bergmann wake_up_all(&ctx->mfc_wq); 1582a33a7d73SArnd Bergmann 1583e48b1b45SHarvey Harrison pr_debug("%s %s\n", __func__, spu->name); 1584a33a7d73SArnd Bergmann if (ctx->mfc_fasync) { 1585a33a7d73SArnd Bergmann u32 free_elements, tagstatus; 1586a33a7d73SArnd Bergmann unsigned int mask; 1587a33a7d73SArnd Bergmann 1588a33a7d73SArnd Bergmann /* no need for spu_acquire in interrupt context */ 1589a33a7d73SArnd Bergmann free_elements = ctx->ops->get_mfc_free_elements(ctx); 1590a33a7d73SArnd Bergmann tagstatus = ctx->ops->read_mfc_tagstatus(ctx); 1591a33a7d73SArnd Bergmann 1592a33a7d73SArnd Bergmann mask = 0; 1593a33a7d73SArnd Bergmann if (free_elements & 0xffff) 1594a33a7d73SArnd Bergmann mask |= POLLOUT; 1595a33a7d73SArnd Bergmann if (tagstatus & ctx->tagwait) 1596a33a7d73SArnd Bergmann mask |= POLLIN; 1597a33a7d73SArnd Bergmann 1598a33a7d73SArnd Bergmann kill_fasync(&ctx->mfc_fasync, SIGIO, mask); 1599a33a7d73SArnd Bergmann } 1600a33a7d73SArnd Bergmann } 1601a33a7d73SArnd Bergmann 1602a33a7d73SArnd Bergmann static int spufs_read_mfc_tagstatus(struct spu_context *ctx, u32 *status) 1603a33a7d73SArnd Bergmann { 1604a33a7d73SArnd Bergmann /* See if there is one tag group is complete */ 1605a33a7d73SArnd Bergmann /* FIXME we need locking around tagwait */ 1606a33a7d73SArnd Bergmann *status = ctx->ops->read_mfc_tagstatus(ctx) & ctx->tagwait; 1607a33a7d73SArnd Bergmann ctx->tagwait &= ~*status; 1608a33a7d73SArnd Bergmann if (*status) 1609a33a7d73SArnd Bergmann return 1; 1610a33a7d73SArnd Bergmann 1611a33a7d73SArnd Bergmann /* enable interrupt waiting for any tag group, 1612a33a7d73SArnd Bergmann may silently fail if interrupts are already enabled */ 1613a33a7d73SArnd Bergmann ctx->ops->set_mfc_query(ctx, ctx->tagwait, 1); 1614a33a7d73SArnd Bergmann return 0; 1615a33a7d73SArnd Bergmann } 1616a33a7d73SArnd Bergmann 1617a33a7d73SArnd Bergmann static ssize_t spufs_mfc_read(struct file *file, char __user *buffer, 1618a33a7d73SArnd Bergmann size_t size, loff_t *pos) 1619a33a7d73SArnd Bergmann { 1620a33a7d73SArnd Bergmann struct spu_context *ctx = file->private_data; 1621a33a7d73SArnd Bergmann int ret = -EINVAL; 1622a33a7d73SArnd Bergmann u32 status; 1623a33a7d73SArnd Bergmann 1624a33a7d73SArnd Bergmann if (size != 4) 1625a33a7d73SArnd Bergmann goto out; 1626a33a7d73SArnd Bergmann 1627c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1628c9101bdbSChristoph Hellwig if (ret) 1629c9101bdbSChristoph Hellwig return ret; 1630c9101bdbSChristoph Hellwig 1631c9101bdbSChristoph Hellwig ret = -EINVAL; 1632a33a7d73SArnd Bergmann if (file->f_flags & O_NONBLOCK) { 1633a33a7d73SArnd Bergmann status = ctx->ops->read_mfc_tagstatus(ctx); 1634a33a7d73SArnd Bergmann if (!(status & ctx->tagwait)) 1635a33a7d73SArnd Bergmann ret = -EAGAIN; 1636a33a7d73SArnd Bergmann else 1637c9101bdbSChristoph Hellwig /* XXX(hch): shouldn't we clear ret here? */ 1638a33a7d73SArnd Bergmann ctx->tagwait &= ~status; 1639a33a7d73SArnd Bergmann } else { 1640a33a7d73SArnd Bergmann ret = spufs_wait(ctx->mfc_wq, 1641a33a7d73SArnd Bergmann spufs_read_mfc_tagstatus(ctx, &status)); 1642a33a7d73SArnd Bergmann if (ret) 1643a33a7d73SArnd Bergmann goto out; 1644eebead5bSChristoph Hellwig } 1645eebead5bSChristoph Hellwig spu_release(ctx); 1646a33a7d73SArnd Bergmann 1647a33a7d73SArnd Bergmann ret = 4; 1648a33a7d73SArnd Bergmann if (copy_to_user(buffer, &status, 4)) 1649a33a7d73SArnd Bergmann ret = -EFAULT; 1650a33a7d73SArnd Bergmann 1651a33a7d73SArnd Bergmann out: 1652a33a7d73SArnd Bergmann return ret; 1653a33a7d73SArnd Bergmann } 1654a33a7d73SArnd Bergmann 1655a33a7d73SArnd Bergmann static int spufs_check_valid_dma(struct mfc_dma_command *cmd) 1656a33a7d73SArnd Bergmann { 16579477e455SStephen Rothwell pr_debug("queueing DMA %x %llx %x %x %x\n", cmd->lsa, 1658a33a7d73SArnd Bergmann cmd->ea, cmd->size, cmd->tag, cmd->cmd); 1659a33a7d73SArnd Bergmann 1660a33a7d73SArnd Bergmann switch (cmd->cmd) { 1661a33a7d73SArnd Bergmann case MFC_PUT_CMD: 1662a33a7d73SArnd Bergmann case MFC_PUTF_CMD: 1663a33a7d73SArnd Bergmann case MFC_PUTB_CMD: 1664a33a7d73SArnd Bergmann case MFC_GET_CMD: 1665a33a7d73SArnd Bergmann case MFC_GETF_CMD: 1666a33a7d73SArnd Bergmann case MFC_GETB_CMD: 1667a33a7d73SArnd Bergmann break; 1668a33a7d73SArnd Bergmann default: 1669a33a7d73SArnd Bergmann pr_debug("invalid DMA opcode %x\n", cmd->cmd); 1670a33a7d73SArnd Bergmann return -EIO; 1671a33a7d73SArnd Bergmann } 1672a33a7d73SArnd Bergmann 1673a33a7d73SArnd Bergmann if ((cmd->lsa & 0xf) != (cmd->ea &0xf)) { 16749477e455SStephen Rothwell pr_debug("invalid DMA alignment, ea %llx lsa %x\n", 1675a33a7d73SArnd Bergmann cmd->ea, cmd->lsa); 1676a33a7d73SArnd Bergmann return -EIO; 1677a33a7d73SArnd Bergmann } 1678a33a7d73SArnd Bergmann 1679a33a7d73SArnd Bergmann switch (cmd->size & 0xf) { 1680a33a7d73SArnd Bergmann case 1: 1681a33a7d73SArnd Bergmann break; 1682a33a7d73SArnd Bergmann case 2: 1683a33a7d73SArnd Bergmann if (cmd->lsa & 1) 1684a33a7d73SArnd Bergmann goto error; 1685a33a7d73SArnd Bergmann break; 1686a33a7d73SArnd Bergmann case 4: 1687a33a7d73SArnd Bergmann if (cmd->lsa & 3) 1688a33a7d73SArnd Bergmann goto error; 1689a33a7d73SArnd Bergmann break; 1690a33a7d73SArnd Bergmann case 8: 1691a33a7d73SArnd Bergmann if (cmd->lsa & 7) 1692a33a7d73SArnd Bergmann goto error; 1693a33a7d73SArnd Bergmann break; 1694a33a7d73SArnd Bergmann case 0: 1695a33a7d73SArnd Bergmann if (cmd->lsa & 15) 1696a33a7d73SArnd Bergmann goto error; 1697a33a7d73SArnd Bergmann break; 1698a33a7d73SArnd Bergmann error: 1699a33a7d73SArnd Bergmann default: 1700a33a7d73SArnd Bergmann pr_debug("invalid DMA alignment %x for size %x\n", 1701a33a7d73SArnd Bergmann cmd->lsa & 0xf, cmd->size); 1702a33a7d73SArnd Bergmann return -EIO; 1703a33a7d73SArnd Bergmann } 1704a33a7d73SArnd Bergmann 1705a33a7d73SArnd Bergmann if (cmd->size > 16 * 1024) { 1706a33a7d73SArnd Bergmann pr_debug("invalid DMA size %x\n", cmd->size); 1707a33a7d73SArnd Bergmann return -EIO; 1708a33a7d73SArnd Bergmann } 1709a33a7d73SArnd Bergmann 1710a33a7d73SArnd Bergmann if (cmd->tag & 0xfff0) { 1711a33a7d73SArnd Bergmann /* we reserve the higher tag numbers for kernel use */ 1712a33a7d73SArnd Bergmann pr_debug("invalid DMA tag\n"); 1713a33a7d73SArnd Bergmann return -EIO; 1714a33a7d73SArnd Bergmann } 1715a33a7d73SArnd Bergmann 1716a33a7d73SArnd Bergmann if (cmd->class) { 1717a33a7d73SArnd Bergmann /* not supported in this version */ 1718a33a7d73SArnd Bergmann pr_debug("invalid DMA class\n"); 1719a33a7d73SArnd Bergmann return -EIO; 1720a33a7d73SArnd Bergmann } 1721a33a7d73SArnd Bergmann 1722a33a7d73SArnd Bergmann return 0; 1723a33a7d73SArnd Bergmann } 1724a33a7d73SArnd Bergmann 1725a33a7d73SArnd Bergmann static int spu_send_mfc_command(struct spu_context *ctx, 1726a33a7d73SArnd Bergmann struct mfc_dma_command cmd, 1727a33a7d73SArnd Bergmann int *error) 1728a33a7d73SArnd Bergmann { 1729a33a7d73SArnd Bergmann *error = ctx->ops->send_mfc_command(ctx, &cmd); 1730a33a7d73SArnd Bergmann if (*error == -EAGAIN) { 1731a33a7d73SArnd Bergmann /* wait for any tag group to complete 1732a33a7d73SArnd Bergmann so we have space for the new command */ 1733a33a7d73SArnd Bergmann ctx->ops->set_mfc_query(ctx, ctx->tagwait, 1); 1734a33a7d73SArnd Bergmann /* try again, because the queue might be 1735a33a7d73SArnd Bergmann empty again */ 1736a33a7d73SArnd Bergmann *error = ctx->ops->send_mfc_command(ctx, &cmd); 1737a33a7d73SArnd Bergmann if (*error == -EAGAIN) 1738a33a7d73SArnd Bergmann return 0; 1739a33a7d73SArnd Bergmann } 1740a33a7d73SArnd Bergmann return 1; 1741a33a7d73SArnd Bergmann } 1742a33a7d73SArnd Bergmann 1743a33a7d73SArnd Bergmann static ssize_t spufs_mfc_write(struct file *file, const char __user *buffer, 1744a33a7d73SArnd Bergmann size_t size, loff_t *pos) 1745a33a7d73SArnd Bergmann { 1746a33a7d73SArnd Bergmann struct spu_context *ctx = file->private_data; 1747a33a7d73SArnd Bergmann struct mfc_dma_command cmd; 1748a33a7d73SArnd Bergmann int ret = -EINVAL; 1749a33a7d73SArnd Bergmann 1750a33a7d73SArnd Bergmann if (size != sizeof cmd) 1751a33a7d73SArnd Bergmann goto out; 1752a33a7d73SArnd Bergmann 1753a33a7d73SArnd Bergmann ret = -EFAULT; 1754a33a7d73SArnd Bergmann if (copy_from_user(&cmd, buffer, sizeof cmd)) 1755a33a7d73SArnd Bergmann goto out; 1756a33a7d73SArnd Bergmann 1757a33a7d73SArnd Bergmann ret = spufs_check_valid_dma(&cmd); 1758a33a7d73SArnd Bergmann if (ret) 1759a33a7d73SArnd Bergmann goto out; 1760a33a7d73SArnd Bergmann 1761c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1762c9101bdbSChristoph Hellwig if (ret) 1763c9101bdbSChristoph Hellwig goto out; 1764c9101bdbSChristoph Hellwig 176533bfd7a7SArnd Bergmann ret = spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE); 1766577f8f10SAkinobu Mita if (ret) 1767577f8f10SAkinobu Mita goto out; 1768577f8f10SAkinobu Mita 1769a33a7d73SArnd Bergmann if (file->f_flags & O_NONBLOCK) { 1770a33a7d73SArnd Bergmann ret = ctx->ops->send_mfc_command(ctx, &cmd); 1771a33a7d73SArnd Bergmann } else { 1772a33a7d73SArnd Bergmann int status; 1773a33a7d73SArnd Bergmann ret = spufs_wait(ctx->mfc_wq, 1774a33a7d73SArnd Bergmann spu_send_mfc_command(ctx, cmd, &status)); 1775eebead5bSChristoph Hellwig if (ret) 1776eebead5bSChristoph Hellwig goto out; 1777a33a7d73SArnd Bergmann if (status) 1778a33a7d73SArnd Bergmann ret = status; 1779a33a7d73SArnd Bergmann } 1780a33a7d73SArnd Bergmann 1781a33a7d73SArnd Bergmann if (ret) 1782933b0e35SKazunori Asayama goto out_unlock; 1783a33a7d73SArnd Bergmann 1784a33a7d73SArnd Bergmann ctx->tagwait |= 1 << cmd.tag; 17853692dc66SMasato Noguchi ret = size; 1786a33a7d73SArnd Bergmann 1787933b0e35SKazunori Asayama out_unlock: 1788933b0e35SKazunori Asayama spu_release(ctx); 1789a33a7d73SArnd Bergmann out: 1790a33a7d73SArnd Bergmann return ret; 1791a33a7d73SArnd Bergmann } 1792a33a7d73SArnd Bergmann 1793a33a7d73SArnd Bergmann static unsigned int spufs_mfc_poll(struct file *file,poll_table *wait) 1794a33a7d73SArnd Bergmann { 1795a33a7d73SArnd Bergmann struct spu_context *ctx = file->private_data; 1796a33a7d73SArnd Bergmann u32 free_elements, tagstatus; 1797a33a7d73SArnd Bergmann unsigned int mask; 1798a33a7d73SArnd Bergmann 1799933b0e35SKazunori Asayama poll_wait(file, &ctx->mfc_wq, wait); 1800933b0e35SKazunori Asayama 1801c9101bdbSChristoph Hellwig /* 1802c9101bdbSChristoph Hellwig * For now keep this uninterruptible and also ignore the rule 1803c9101bdbSChristoph Hellwig * that poll should not sleep. Will be fixed later. 1804c9101bdbSChristoph Hellwig */ 1805c9101bdbSChristoph Hellwig mutex_lock(&ctx->state_mutex); 1806a33a7d73SArnd Bergmann ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2); 1807a33a7d73SArnd Bergmann free_elements = ctx->ops->get_mfc_free_elements(ctx); 1808a33a7d73SArnd Bergmann tagstatus = ctx->ops->read_mfc_tagstatus(ctx); 1809a33a7d73SArnd Bergmann spu_release(ctx); 1810a33a7d73SArnd Bergmann 1811a33a7d73SArnd Bergmann mask = 0; 1812a33a7d73SArnd Bergmann if (free_elements & 0xffff) 1813a33a7d73SArnd Bergmann mask |= POLLOUT | POLLWRNORM; 1814a33a7d73SArnd Bergmann if (tagstatus & ctx->tagwait) 1815a33a7d73SArnd Bergmann mask |= POLLIN | POLLRDNORM; 1816a33a7d73SArnd Bergmann 1817e48b1b45SHarvey Harrison pr_debug("%s: free %d tagstatus %d tagwait %d\n", __func__, 1818a33a7d73SArnd Bergmann free_elements, tagstatus, ctx->tagwait); 1819a33a7d73SArnd Bergmann 1820a33a7d73SArnd Bergmann return mask; 1821a33a7d73SArnd Bergmann } 1822a33a7d73SArnd Bergmann 182373b6af8aSAl Viro static int spufs_mfc_flush(struct file *file, fl_owner_t id) 1824a33a7d73SArnd Bergmann { 1825a33a7d73SArnd Bergmann struct spu_context *ctx = file->private_data; 1826a33a7d73SArnd Bergmann int ret; 1827a33a7d73SArnd Bergmann 1828c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1829c9101bdbSChristoph Hellwig if (ret) 1830eebead5bSChristoph Hellwig goto out; 1831a33a7d73SArnd Bergmann #if 0 1832a33a7d73SArnd Bergmann /* this currently hangs */ 1833a33a7d73SArnd Bergmann ret = spufs_wait(ctx->mfc_wq, 1834a33a7d73SArnd Bergmann ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2)); 1835a33a7d73SArnd Bergmann if (ret) 1836a33a7d73SArnd Bergmann goto out; 1837a33a7d73SArnd Bergmann ret = spufs_wait(ctx->mfc_wq, 1838a33a7d73SArnd Bergmann ctx->ops->read_mfc_tagstatus(ctx) == ctx->tagwait); 1839eebead5bSChristoph Hellwig if (ret) 1840eebead5bSChristoph Hellwig goto out; 1841a33a7d73SArnd Bergmann #else 1842a33a7d73SArnd Bergmann ret = 0; 1843a33a7d73SArnd Bergmann #endif 1844a33a7d73SArnd Bergmann spu_release(ctx); 1845eebead5bSChristoph Hellwig out: 1846a33a7d73SArnd Bergmann return ret; 1847a33a7d73SArnd Bergmann } 1848a33a7d73SArnd Bergmann 1849a33a7d73SArnd Bergmann static int spufs_mfc_fsync(struct file *file, struct dentry *dentry, 1850a33a7d73SArnd Bergmann int datasync) 1851a33a7d73SArnd Bergmann { 185273b6af8aSAl Viro return spufs_mfc_flush(file, NULL); 1853a33a7d73SArnd Bergmann } 1854a33a7d73SArnd Bergmann 1855a33a7d73SArnd Bergmann static int spufs_mfc_fasync(int fd, struct file *file, int on) 1856a33a7d73SArnd Bergmann { 1857a33a7d73SArnd Bergmann struct spu_context *ctx = file->private_data; 1858a33a7d73SArnd Bergmann 1859a33a7d73SArnd Bergmann return fasync_helper(fd, file, on, &ctx->mfc_fasync); 1860a33a7d73SArnd Bergmann } 1861a33a7d73SArnd Bergmann 18625dfe4c96SArjan van de Ven static const struct file_operations spufs_mfc_fops = { 1863a33a7d73SArnd Bergmann .open = spufs_mfc_open, 186443c2bbd9SChristoph Hellwig .release = spufs_mfc_release, 1865a33a7d73SArnd Bergmann .read = spufs_mfc_read, 1866a33a7d73SArnd Bergmann .write = spufs_mfc_write, 1867a33a7d73SArnd Bergmann .poll = spufs_mfc_poll, 1868a33a7d73SArnd Bergmann .flush = spufs_mfc_flush, 1869a33a7d73SArnd Bergmann .fsync = spufs_mfc_fsync, 1870a33a7d73SArnd Bergmann .fasync = spufs_mfc_fasync, 18716df10a82SMark Nutter .mmap = spufs_mfc_mmap, 1872a33a7d73SArnd Bergmann }; 1873a33a7d73SArnd Bergmann 1874197b1a82SChristoph Hellwig static int spufs_npc_set(void *data, u64 val) 187567207b96SArnd Bergmann { 187667207b96SArnd Bergmann struct spu_context *ctx = data; 1877c9101bdbSChristoph Hellwig int ret; 1878c9101bdbSChristoph Hellwig 1879c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1880c9101bdbSChristoph Hellwig if (ret) 1881c9101bdbSChristoph Hellwig return ret; 18828b3d6663SArnd Bergmann ctx->ops->npc_write(ctx, val); 18838b3d6663SArnd Bergmann spu_release(ctx); 1884197b1a82SChristoph Hellwig 1885197b1a82SChristoph Hellwig return 0; 188667207b96SArnd Bergmann } 188767207b96SArnd Bergmann 1888104f0cc2SMichael Ellerman static u64 spufs_npc_get(struct spu_context *ctx) 188978810ff6SMichael Ellerman { 189078810ff6SMichael Ellerman return ctx->ops->npc_read(ctx); 189178810ff6SMichael Ellerman } 1892104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_npc_ops, spufs_npc_get, spufs_npc_set, 1893104f0cc2SMichael Ellerman "0x%llx\n", SPU_ATTR_ACQUIRE); 189467207b96SArnd Bergmann 1895197b1a82SChristoph Hellwig static int spufs_decr_set(void *data, u64 val) 18968b3d6663SArnd Bergmann { 18978b3d6663SArnd Bergmann struct spu_context *ctx = data; 18988b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 1899c9101bdbSChristoph Hellwig int ret; 1900c9101bdbSChristoph Hellwig 1901c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 1902c9101bdbSChristoph Hellwig if (ret) 1903c9101bdbSChristoph Hellwig return ret; 19048b3d6663SArnd Bergmann lscsa->decr.slot[0] = (u32) val; 190527b1ea09SChristoph Hellwig spu_release_saved(ctx); 1906197b1a82SChristoph Hellwig 1907197b1a82SChristoph Hellwig return 0; 19088b3d6663SArnd Bergmann } 19098b3d6663SArnd Bergmann 1910104f0cc2SMichael Ellerman static u64 spufs_decr_get(struct spu_context *ctx) 19118b3d6663SArnd Bergmann { 19128b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 1913bf1ab978SDwayne Grant McConnell return lscsa->decr.slot[0]; 1914bf1ab978SDwayne Grant McConnell } 1915104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_decr_ops, spufs_decr_get, spufs_decr_set, 1916104f0cc2SMichael Ellerman "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED); 19178b3d6663SArnd Bergmann 1918197b1a82SChristoph Hellwig static int spufs_decr_status_set(void *data, u64 val) 19198b3d6663SArnd Bergmann { 19208b3d6663SArnd Bergmann struct spu_context *ctx = data; 1921c9101bdbSChristoph Hellwig int ret; 1922c9101bdbSChristoph Hellwig 1923c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 1924c9101bdbSChristoph Hellwig if (ret) 1925c9101bdbSChristoph Hellwig return ret; 1926d40a01d4SMasato Noguchi if (val) 1927d40a01d4SMasato Noguchi ctx->csa.priv2.mfc_control_RW |= MFC_CNTL_DECREMENTER_RUNNING; 1928d40a01d4SMasato Noguchi else 1929d40a01d4SMasato Noguchi ctx->csa.priv2.mfc_control_RW &= ~MFC_CNTL_DECREMENTER_RUNNING; 193027b1ea09SChristoph Hellwig spu_release_saved(ctx); 1931197b1a82SChristoph Hellwig 1932197b1a82SChristoph Hellwig return 0; 19338b3d6663SArnd Bergmann } 19348b3d6663SArnd Bergmann 1935104f0cc2SMichael Ellerman static u64 spufs_decr_status_get(struct spu_context *ctx) 19368b3d6663SArnd Bergmann { 1937d40a01d4SMasato Noguchi if (ctx->csa.priv2.mfc_control_RW & MFC_CNTL_DECREMENTER_RUNNING) 1938d40a01d4SMasato Noguchi return SPU_DECR_STATUS_RUNNING; 1939d40a01d4SMasato Noguchi else 1940d40a01d4SMasato Noguchi return 0; 1941bf1ab978SDwayne Grant McConnell } 1942104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_decr_status_ops, spufs_decr_status_get, 1943104f0cc2SMichael Ellerman spufs_decr_status_set, "0x%llx\n", 1944104f0cc2SMichael Ellerman SPU_ATTR_ACQUIRE_SAVED); 19458b3d6663SArnd Bergmann 1946197b1a82SChristoph Hellwig static int spufs_event_mask_set(void *data, u64 val) 19478b3d6663SArnd Bergmann { 19488b3d6663SArnd Bergmann struct spu_context *ctx = data; 19498b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 1950c9101bdbSChristoph Hellwig int ret; 1951c9101bdbSChristoph Hellwig 1952c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 1953c9101bdbSChristoph Hellwig if (ret) 1954c9101bdbSChristoph Hellwig return ret; 19558b3d6663SArnd Bergmann lscsa->event_mask.slot[0] = (u32) val; 195627b1ea09SChristoph Hellwig spu_release_saved(ctx); 1957197b1a82SChristoph Hellwig 1958197b1a82SChristoph Hellwig return 0; 19598b3d6663SArnd Bergmann } 19608b3d6663SArnd Bergmann 1961104f0cc2SMichael Ellerman static u64 spufs_event_mask_get(struct spu_context *ctx) 19628b3d6663SArnd Bergmann { 19638b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 1964bf1ab978SDwayne Grant McConnell return lscsa->event_mask.slot[0]; 1965bf1ab978SDwayne Grant McConnell } 1966bf1ab978SDwayne Grant McConnell 1967104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_event_mask_ops, spufs_event_mask_get, 1968104f0cc2SMichael Ellerman spufs_event_mask_set, "0x%llx\n", 1969104f0cc2SMichael Ellerman SPU_ATTR_ACQUIRE_SAVED); 19708b3d6663SArnd Bergmann 1971104f0cc2SMichael Ellerman static u64 spufs_event_status_get(struct spu_context *ctx) 1972b9e3bd77SDwayne Grant McConnell { 1973b9e3bd77SDwayne Grant McConnell struct spu_state *state = &ctx->csa; 1974b9e3bd77SDwayne Grant McConnell u64 stat; 1975b9e3bd77SDwayne Grant McConnell stat = state->spu_chnlcnt_RW[0]; 1976b9e3bd77SDwayne Grant McConnell if (stat) 1977bf1ab978SDwayne Grant McConnell return state->spu_chnldata_RW[0]; 1978bf1ab978SDwayne Grant McConnell return 0; 1979bf1ab978SDwayne Grant McConnell } 1980104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_event_status_ops, spufs_event_status_get, 1981104f0cc2SMichael Ellerman NULL, "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED) 1982b9e3bd77SDwayne Grant McConnell 1983197b1a82SChristoph Hellwig static int spufs_srr0_set(void *data, u64 val) 19848b3d6663SArnd Bergmann { 19858b3d6663SArnd Bergmann struct spu_context *ctx = data; 19868b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 1987c9101bdbSChristoph Hellwig int ret; 1988c9101bdbSChristoph Hellwig 1989c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 1990c9101bdbSChristoph Hellwig if (ret) 1991c9101bdbSChristoph Hellwig return ret; 19928b3d6663SArnd Bergmann lscsa->srr0.slot[0] = (u32) val; 199327b1ea09SChristoph Hellwig spu_release_saved(ctx); 1994197b1a82SChristoph Hellwig 1995197b1a82SChristoph Hellwig return 0; 19968b3d6663SArnd Bergmann } 19978b3d6663SArnd Bergmann 1998104f0cc2SMichael Ellerman static u64 spufs_srr0_get(struct spu_context *ctx) 19998b3d6663SArnd Bergmann { 20008b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 2001104f0cc2SMichael Ellerman return lscsa->srr0.slot[0]; 20028b3d6663SArnd Bergmann } 2003104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_srr0_ops, spufs_srr0_get, spufs_srr0_set, 2004104f0cc2SMichael Ellerman "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED) 20058b3d6663SArnd Bergmann 2006104f0cc2SMichael Ellerman static u64 spufs_id_get(struct spu_context *ctx) 20077b1a7014Sarnd@arndb.de { 20087b1a7014Sarnd@arndb.de u64 num; 20097b1a7014Sarnd@arndb.de 20107b1a7014Sarnd@arndb.de if (ctx->state == SPU_STATE_RUNNABLE) 20117b1a7014Sarnd@arndb.de num = ctx->spu->number; 20127b1a7014Sarnd@arndb.de else 20137b1a7014Sarnd@arndb.de num = (unsigned int)-1; 20147b1a7014Sarnd@arndb.de 20157b1a7014Sarnd@arndb.de return num; 20167b1a7014Sarnd@arndb.de } 2017104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_id_ops, spufs_id_get, NULL, "0x%llx\n", 2018104f0cc2SMichael Ellerman SPU_ATTR_ACQUIRE) 20197b1a7014Sarnd@arndb.de 2020104f0cc2SMichael Ellerman static u64 spufs_object_id_get(struct spu_context *ctx) 2021bf1ab978SDwayne Grant McConnell { 2022bf1ab978SDwayne Grant McConnell /* FIXME: Should there really be no locking here? */ 2023104f0cc2SMichael Ellerman return ctx->object_id; 2024bf1ab978SDwayne Grant McConnell } 2025bf1ab978SDwayne Grant McConnell 2026197b1a82SChristoph Hellwig static int spufs_object_id_set(void *data, u64 id) 202786767277SArnd Bergmann { 202886767277SArnd Bergmann struct spu_context *ctx = data; 202986767277SArnd Bergmann ctx->object_id = id; 2030197b1a82SChristoph Hellwig 2031197b1a82SChristoph Hellwig return 0; 203286767277SArnd Bergmann } 203386767277SArnd Bergmann 2034104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_object_id_ops, spufs_object_id_get, 2035104f0cc2SMichael Ellerman spufs_object_id_set, "0x%llx\n", SPU_ATTR_NOACQUIRE); 203686767277SArnd Bergmann 2037104f0cc2SMichael Ellerman static u64 spufs_lslr_get(struct spu_context *ctx) 2038bf1ab978SDwayne Grant McConnell { 2039bf1ab978SDwayne Grant McConnell return ctx->csa.priv2.spu_lslr_RW; 2040bf1ab978SDwayne Grant McConnell } 2041104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_lslr_ops, spufs_lslr_get, NULL, "0x%llx\n", 2042104f0cc2SMichael Ellerman SPU_ATTR_ACQUIRE_SAVED); 2043b9e3bd77SDwayne Grant McConnell 2044b9e3bd77SDwayne Grant McConnell static int spufs_info_open(struct inode *inode, struct file *file) 2045b9e3bd77SDwayne Grant McConnell { 2046b9e3bd77SDwayne Grant McConnell struct spufs_inode_info *i = SPUFS_I(inode); 2047b9e3bd77SDwayne Grant McConnell struct spu_context *ctx = i->i_ctx; 2048b9e3bd77SDwayne Grant McConnell file->private_data = ctx; 2049b9e3bd77SDwayne Grant McConnell return 0; 2050b9e3bd77SDwayne Grant McConnell } 2051b9e3bd77SDwayne Grant McConnell 2052cbe709c1SBenjamin Herrenschmidt static int spufs_caps_show(struct seq_file *s, void *private) 2053cbe709c1SBenjamin Herrenschmidt { 2054cbe709c1SBenjamin Herrenschmidt struct spu_context *ctx = s->private; 2055cbe709c1SBenjamin Herrenschmidt 2056cbe709c1SBenjamin Herrenschmidt if (!(ctx->flags & SPU_CREATE_NOSCHED)) 2057cbe709c1SBenjamin Herrenschmidt seq_puts(s, "sched\n"); 2058cbe709c1SBenjamin Herrenschmidt if (!(ctx->flags & SPU_CREATE_ISOLATE)) 2059cbe709c1SBenjamin Herrenschmidt seq_puts(s, "step\n"); 2060cbe709c1SBenjamin Herrenschmidt return 0; 2061cbe709c1SBenjamin Herrenschmidt } 2062cbe709c1SBenjamin Herrenschmidt 2063cbe709c1SBenjamin Herrenschmidt static int spufs_caps_open(struct inode *inode, struct file *file) 2064cbe709c1SBenjamin Herrenschmidt { 2065cbe709c1SBenjamin Herrenschmidt return single_open(file, spufs_caps_show, SPUFS_I(inode)->i_ctx); 2066cbe709c1SBenjamin Herrenschmidt } 2067cbe709c1SBenjamin Herrenschmidt 2068cbe709c1SBenjamin Herrenschmidt static const struct file_operations spufs_caps_fops = { 2069cbe709c1SBenjamin Herrenschmidt .open = spufs_caps_open, 2070cbe709c1SBenjamin Herrenschmidt .read = seq_read, 2071cbe709c1SBenjamin Herrenschmidt .llseek = seq_lseek, 2072cbe709c1SBenjamin Herrenschmidt .release = single_release, 2073cbe709c1SBenjamin Herrenschmidt }; 2074cbe709c1SBenjamin Herrenschmidt 2075bf1ab978SDwayne Grant McConnell static ssize_t __spufs_mbox_info_read(struct spu_context *ctx, 2076bf1ab978SDwayne Grant McConnell char __user *buf, size_t len, loff_t *pos) 2077bf1ab978SDwayne Grant McConnell { 2078bf1ab978SDwayne Grant McConnell u32 data; 2079bf1ab978SDwayne Grant McConnell 2080cbea9238SJeremy Kerr /* EOF if there's no entry in the mbox */ 2081cbea9238SJeremy Kerr if (!(ctx->csa.prob.mb_stat_R & 0x0000ff)) 2082cbea9238SJeremy Kerr return 0; 2083cbea9238SJeremy Kerr 2084bf1ab978SDwayne Grant McConnell data = ctx->csa.prob.pu_mb_R; 2085bf1ab978SDwayne Grant McConnell 2086bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buf, len, pos, &data, sizeof data); 2087bf1ab978SDwayne Grant McConnell } 2088bf1ab978SDwayne Grant McConnell 208969a2f00cSDwayne Grant McConnell static ssize_t spufs_mbox_info_read(struct file *file, char __user *buf, 209069a2f00cSDwayne Grant McConnell size_t len, loff_t *pos) 209169a2f00cSDwayne Grant McConnell { 2092bf1ab978SDwayne Grant McConnell int ret; 209369a2f00cSDwayne Grant McConnell struct spu_context *ctx = file->private_data; 209469a2f00cSDwayne Grant McConnell 209569a2f00cSDwayne Grant McConnell if (!access_ok(VERIFY_WRITE, buf, len)) 209669a2f00cSDwayne Grant McConnell return -EFAULT; 209769a2f00cSDwayne Grant McConnell 2098c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 2099c9101bdbSChristoph Hellwig if (ret) 2100c9101bdbSChristoph Hellwig return ret; 210169a2f00cSDwayne Grant McConnell spin_lock(&ctx->csa.register_lock); 2102bf1ab978SDwayne Grant McConnell ret = __spufs_mbox_info_read(ctx, buf, len, pos); 210369a2f00cSDwayne Grant McConnell spin_unlock(&ctx->csa.register_lock); 210427b1ea09SChristoph Hellwig spu_release_saved(ctx); 210569a2f00cSDwayne Grant McConnell 2106bf1ab978SDwayne Grant McConnell return ret; 210769a2f00cSDwayne Grant McConnell } 210869a2f00cSDwayne Grant McConnell 21095dfe4c96SArjan van de Ven static const struct file_operations spufs_mbox_info_fops = { 211069a2f00cSDwayne Grant McConnell .open = spufs_info_open, 211169a2f00cSDwayne Grant McConnell .read = spufs_mbox_info_read, 211269a2f00cSDwayne Grant McConnell .llseek = generic_file_llseek, 211369a2f00cSDwayne Grant McConnell }; 211469a2f00cSDwayne Grant McConnell 2115bf1ab978SDwayne Grant McConnell static ssize_t __spufs_ibox_info_read(struct spu_context *ctx, 2116bf1ab978SDwayne Grant McConnell char __user *buf, size_t len, loff_t *pos) 2117bf1ab978SDwayne Grant McConnell { 2118bf1ab978SDwayne Grant McConnell u32 data; 2119bf1ab978SDwayne Grant McConnell 2120cbea9238SJeremy Kerr /* EOF if there's no entry in the ibox */ 2121cbea9238SJeremy Kerr if (!(ctx->csa.prob.mb_stat_R & 0xff0000)) 2122cbea9238SJeremy Kerr return 0; 2123cbea9238SJeremy Kerr 2124bf1ab978SDwayne Grant McConnell data = ctx->csa.priv2.puint_mb_R; 2125bf1ab978SDwayne Grant McConnell 2126bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buf, len, pos, &data, sizeof data); 2127bf1ab978SDwayne Grant McConnell } 2128bf1ab978SDwayne Grant McConnell 212969a2f00cSDwayne Grant McConnell static ssize_t spufs_ibox_info_read(struct file *file, char __user *buf, 213069a2f00cSDwayne Grant McConnell size_t len, loff_t *pos) 213169a2f00cSDwayne Grant McConnell { 213269a2f00cSDwayne Grant McConnell struct spu_context *ctx = file->private_data; 2133bf1ab978SDwayne Grant McConnell int ret; 213469a2f00cSDwayne Grant McConnell 213569a2f00cSDwayne Grant McConnell if (!access_ok(VERIFY_WRITE, buf, len)) 213669a2f00cSDwayne Grant McConnell return -EFAULT; 213769a2f00cSDwayne Grant McConnell 2138c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 2139c9101bdbSChristoph Hellwig if (ret) 2140c9101bdbSChristoph Hellwig return ret; 214169a2f00cSDwayne Grant McConnell spin_lock(&ctx->csa.register_lock); 2142bf1ab978SDwayne Grant McConnell ret = __spufs_ibox_info_read(ctx, buf, len, pos); 214369a2f00cSDwayne Grant McConnell spin_unlock(&ctx->csa.register_lock); 214427b1ea09SChristoph Hellwig spu_release_saved(ctx); 214569a2f00cSDwayne Grant McConnell 2146bf1ab978SDwayne Grant McConnell return ret; 214769a2f00cSDwayne Grant McConnell } 214869a2f00cSDwayne Grant McConnell 21495dfe4c96SArjan van de Ven static const struct file_operations spufs_ibox_info_fops = { 215069a2f00cSDwayne Grant McConnell .open = spufs_info_open, 215169a2f00cSDwayne Grant McConnell .read = spufs_ibox_info_read, 215269a2f00cSDwayne Grant McConnell .llseek = generic_file_llseek, 215369a2f00cSDwayne Grant McConnell }; 215469a2f00cSDwayne Grant McConnell 2155bf1ab978SDwayne Grant McConnell static ssize_t __spufs_wbox_info_read(struct spu_context *ctx, 2156bf1ab978SDwayne Grant McConnell char __user *buf, size_t len, loff_t *pos) 2157bf1ab978SDwayne Grant McConnell { 2158bf1ab978SDwayne Grant McConnell int i, cnt; 2159bf1ab978SDwayne Grant McConnell u32 data[4]; 2160bf1ab978SDwayne Grant McConnell u32 wbox_stat; 2161bf1ab978SDwayne Grant McConnell 2162bf1ab978SDwayne Grant McConnell wbox_stat = ctx->csa.prob.mb_stat_R; 2163bf1ab978SDwayne Grant McConnell cnt = 4 - ((wbox_stat & 0x00ff00) >> 8); 2164bf1ab978SDwayne Grant McConnell for (i = 0; i < cnt; i++) { 2165bf1ab978SDwayne Grant McConnell data[i] = ctx->csa.spu_mailbox_data[i]; 2166bf1ab978SDwayne Grant McConnell } 2167bf1ab978SDwayne Grant McConnell 2168bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buf, len, pos, &data, 2169bf1ab978SDwayne Grant McConnell cnt * sizeof(u32)); 2170bf1ab978SDwayne Grant McConnell } 2171bf1ab978SDwayne Grant McConnell 217269a2f00cSDwayne Grant McConnell static ssize_t spufs_wbox_info_read(struct file *file, char __user *buf, 217369a2f00cSDwayne Grant McConnell size_t len, loff_t *pos) 217469a2f00cSDwayne Grant McConnell { 217569a2f00cSDwayne Grant McConnell struct spu_context *ctx = file->private_data; 2176bf1ab978SDwayne Grant McConnell int ret; 217769a2f00cSDwayne Grant McConnell 217869a2f00cSDwayne Grant McConnell if (!access_ok(VERIFY_WRITE, buf, len)) 217969a2f00cSDwayne Grant McConnell return -EFAULT; 218069a2f00cSDwayne Grant McConnell 2181c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 2182c9101bdbSChristoph Hellwig if (ret) 2183c9101bdbSChristoph Hellwig return ret; 218469a2f00cSDwayne Grant McConnell spin_lock(&ctx->csa.register_lock); 2185bf1ab978SDwayne Grant McConnell ret = __spufs_wbox_info_read(ctx, buf, len, pos); 218669a2f00cSDwayne Grant McConnell spin_unlock(&ctx->csa.register_lock); 218727b1ea09SChristoph Hellwig spu_release_saved(ctx); 218869a2f00cSDwayne Grant McConnell 2189bf1ab978SDwayne Grant McConnell return ret; 219069a2f00cSDwayne Grant McConnell } 219169a2f00cSDwayne Grant McConnell 21925dfe4c96SArjan van de Ven static const struct file_operations spufs_wbox_info_fops = { 219369a2f00cSDwayne Grant McConnell .open = spufs_info_open, 219469a2f00cSDwayne Grant McConnell .read = spufs_wbox_info_read, 219569a2f00cSDwayne Grant McConnell .llseek = generic_file_llseek, 219669a2f00cSDwayne Grant McConnell }; 219769a2f00cSDwayne Grant McConnell 2198bf1ab978SDwayne Grant McConnell static ssize_t __spufs_dma_info_read(struct spu_context *ctx, 2199bf1ab978SDwayne Grant McConnell char __user *buf, size_t len, loff_t *pos) 2200b9e3bd77SDwayne Grant McConnell { 2201b9e3bd77SDwayne Grant McConnell struct spu_dma_info info; 2202b9e3bd77SDwayne Grant McConnell struct mfc_cq_sr *qp, *spuqp; 2203b9e3bd77SDwayne Grant McConnell int i; 2204b9e3bd77SDwayne Grant McConnell 2205b9e3bd77SDwayne Grant McConnell info.dma_info_type = ctx->csa.priv2.spu_tag_status_query_RW; 2206b9e3bd77SDwayne Grant McConnell info.dma_info_mask = ctx->csa.lscsa->tag_mask.slot[0]; 2207b9e3bd77SDwayne Grant McConnell info.dma_info_status = ctx->csa.spu_chnldata_RW[24]; 2208b9e3bd77SDwayne Grant McConnell info.dma_info_stall_and_notify = ctx->csa.spu_chnldata_RW[25]; 2209b9e3bd77SDwayne Grant McConnell info.dma_info_atomic_command_status = ctx->csa.spu_chnldata_RW[27]; 2210b9e3bd77SDwayne Grant McConnell for (i = 0; i < 16; i++) { 2211b9e3bd77SDwayne Grant McConnell qp = &info.dma_info_command_data[i]; 2212b9e3bd77SDwayne Grant McConnell spuqp = &ctx->csa.priv2.spuq[i]; 2213b9e3bd77SDwayne Grant McConnell 2214b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data0_RW = spuqp->mfc_cq_data0_RW; 2215b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data1_RW = spuqp->mfc_cq_data1_RW; 2216b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data2_RW = spuqp->mfc_cq_data2_RW; 2217b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data3_RW = spuqp->mfc_cq_data3_RW; 2218b9e3bd77SDwayne Grant McConnell } 2219b9e3bd77SDwayne Grant McConnell 2220b9e3bd77SDwayne Grant McConnell return simple_read_from_buffer(buf, len, pos, &info, 2221b9e3bd77SDwayne Grant McConnell sizeof info); 2222b9e3bd77SDwayne Grant McConnell } 2223b9e3bd77SDwayne Grant McConnell 2224bf1ab978SDwayne Grant McConnell static ssize_t spufs_dma_info_read(struct file *file, char __user *buf, 2225bf1ab978SDwayne Grant McConnell size_t len, loff_t *pos) 2226bf1ab978SDwayne Grant McConnell { 2227bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 2228bf1ab978SDwayne Grant McConnell int ret; 2229bf1ab978SDwayne Grant McConnell 2230bf1ab978SDwayne Grant McConnell if (!access_ok(VERIFY_WRITE, buf, len)) 2231bf1ab978SDwayne Grant McConnell return -EFAULT; 2232bf1ab978SDwayne Grant McConnell 2233c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 2234c9101bdbSChristoph Hellwig if (ret) 2235c9101bdbSChristoph Hellwig return ret; 2236bf1ab978SDwayne Grant McConnell spin_lock(&ctx->csa.register_lock); 2237bf1ab978SDwayne Grant McConnell ret = __spufs_dma_info_read(ctx, buf, len, pos); 2238bf1ab978SDwayne Grant McConnell spin_unlock(&ctx->csa.register_lock); 223927b1ea09SChristoph Hellwig spu_release_saved(ctx); 2240bf1ab978SDwayne Grant McConnell 2241bf1ab978SDwayne Grant McConnell return ret; 2242bf1ab978SDwayne Grant McConnell } 2243bf1ab978SDwayne Grant McConnell 22445dfe4c96SArjan van de Ven static const struct file_operations spufs_dma_info_fops = { 2245b9e3bd77SDwayne Grant McConnell .open = spufs_info_open, 2246b9e3bd77SDwayne Grant McConnell .read = spufs_dma_info_read, 2247b9e3bd77SDwayne Grant McConnell }; 2248b9e3bd77SDwayne Grant McConnell 2249bf1ab978SDwayne Grant McConnell static ssize_t __spufs_proxydma_info_read(struct spu_context *ctx, 2250bf1ab978SDwayne Grant McConnell char __user *buf, size_t len, loff_t *pos) 2251b9e3bd77SDwayne Grant McConnell { 2252b9e3bd77SDwayne Grant McConnell struct spu_proxydma_info info; 2253b9e3bd77SDwayne Grant McConnell struct mfc_cq_sr *qp, *puqp; 2254bf1ab978SDwayne Grant McConnell int ret = sizeof info; 2255b9e3bd77SDwayne Grant McConnell int i; 2256b9e3bd77SDwayne Grant McConnell 2257b9e3bd77SDwayne Grant McConnell if (len < ret) 2258b9e3bd77SDwayne Grant McConnell return -EINVAL; 2259b9e3bd77SDwayne Grant McConnell 2260b9e3bd77SDwayne Grant McConnell if (!access_ok(VERIFY_WRITE, buf, len)) 2261b9e3bd77SDwayne Grant McConnell return -EFAULT; 2262b9e3bd77SDwayne Grant McConnell 2263b9e3bd77SDwayne Grant McConnell info.proxydma_info_type = ctx->csa.prob.dma_querytype_RW; 2264b9e3bd77SDwayne Grant McConnell info.proxydma_info_mask = ctx->csa.prob.dma_querymask_RW; 2265b9e3bd77SDwayne Grant McConnell info.proxydma_info_status = ctx->csa.prob.dma_tagstatus_R; 2266b9e3bd77SDwayne Grant McConnell for (i = 0; i < 8; i++) { 2267b9e3bd77SDwayne Grant McConnell qp = &info.proxydma_info_command_data[i]; 2268b9e3bd77SDwayne Grant McConnell puqp = &ctx->csa.priv2.puq[i]; 2269b9e3bd77SDwayne Grant McConnell 2270b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data0_RW = puqp->mfc_cq_data0_RW; 2271b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data1_RW = puqp->mfc_cq_data1_RW; 2272b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data2_RW = puqp->mfc_cq_data2_RW; 2273b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data3_RW = puqp->mfc_cq_data3_RW; 2274b9e3bd77SDwayne Grant McConnell } 2275bf1ab978SDwayne Grant McConnell 2276bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buf, len, pos, &info, 2277bf1ab978SDwayne Grant McConnell sizeof info); 2278bf1ab978SDwayne Grant McConnell } 2279bf1ab978SDwayne Grant McConnell 2280bf1ab978SDwayne Grant McConnell static ssize_t spufs_proxydma_info_read(struct file *file, char __user *buf, 2281bf1ab978SDwayne Grant McConnell size_t len, loff_t *pos) 2282bf1ab978SDwayne Grant McConnell { 2283bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 2284bf1ab978SDwayne Grant McConnell int ret; 2285bf1ab978SDwayne Grant McConnell 2286c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 2287c9101bdbSChristoph Hellwig if (ret) 2288c9101bdbSChristoph Hellwig return ret; 2289bf1ab978SDwayne Grant McConnell spin_lock(&ctx->csa.register_lock); 2290bf1ab978SDwayne Grant McConnell ret = __spufs_proxydma_info_read(ctx, buf, len, pos); 2291b9e3bd77SDwayne Grant McConnell spin_unlock(&ctx->csa.register_lock); 229227b1ea09SChristoph Hellwig spu_release_saved(ctx); 2293b9e3bd77SDwayne Grant McConnell 2294b9e3bd77SDwayne Grant McConnell return ret; 2295b9e3bd77SDwayne Grant McConnell } 2296b9e3bd77SDwayne Grant McConnell 22975dfe4c96SArjan van de Ven static const struct file_operations spufs_proxydma_info_fops = { 2298b9e3bd77SDwayne Grant McConnell .open = spufs_info_open, 2299b9e3bd77SDwayne Grant McConnell .read = spufs_proxydma_info_read, 2300b9e3bd77SDwayne Grant McConnell }; 2301b9e3bd77SDwayne Grant McConnell 2302476273adSChristoph Hellwig static int spufs_show_tid(struct seq_file *s, void *private) 2303476273adSChristoph Hellwig { 2304476273adSChristoph Hellwig struct spu_context *ctx = s->private; 2305476273adSChristoph Hellwig 2306476273adSChristoph Hellwig seq_printf(s, "%d\n", ctx->tid); 2307476273adSChristoph Hellwig return 0; 2308476273adSChristoph Hellwig } 2309476273adSChristoph Hellwig 2310476273adSChristoph Hellwig static int spufs_tid_open(struct inode *inode, struct file *file) 2311476273adSChristoph Hellwig { 2312476273adSChristoph Hellwig return single_open(file, spufs_show_tid, SPUFS_I(inode)->i_ctx); 2313476273adSChristoph Hellwig } 2314476273adSChristoph Hellwig 2315476273adSChristoph Hellwig static const struct file_operations spufs_tid_fops = { 2316476273adSChristoph Hellwig .open = spufs_tid_open, 2317476273adSChristoph Hellwig .read = seq_read, 2318476273adSChristoph Hellwig .llseek = seq_lseek, 2319476273adSChristoph Hellwig .release = single_release, 2320476273adSChristoph Hellwig }; 2321476273adSChristoph Hellwig 2322e9f8a0b6SChristoph Hellwig static const char *ctx_state_names[] = { 2323e9f8a0b6SChristoph Hellwig "user", "system", "iowait", "loaded" 2324e9f8a0b6SChristoph Hellwig }; 2325e9f8a0b6SChristoph Hellwig 2326e9f8a0b6SChristoph Hellwig static unsigned long long spufs_acct_time(struct spu_context *ctx, 232727ec41d3SAndre Detsch enum spu_utilization_state state) 2328e9f8a0b6SChristoph Hellwig { 232927ec41d3SAndre Detsch struct timespec ts; 233027ec41d3SAndre Detsch unsigned long long time = ctx->stats.times[state]; 2331e9f8a0b6SChristoph Hellwig 233227ec41d3SAndre Detsch /* 233327ec41d3SAndre Detsch * In general, utilization statistics are updated by the controlling 233427ec41d3SAndre Detsch * thread as the spu context moves through various well defined 233527ec41d3SAndre Detsch * state transitions, but if the context is lazily loaded its 233627ec41d3SAndre Detsch * utilization statistics are not updated as the controlling thread 233727ec41d3SAndre Detsch * is not tightly coupled with the execution of the spu context. We 233827ec41d3SAndre Detsch * calculate and apply the time delta from the last recorded state 233927ec41d3SAndre Detsch * of the spu context. 234027ec41d3SAndre Detsch */ 234127ec41d3SAndre Detsch if (ctx->spu && ctx->stats.util_state == state) { 234227ec41d3SAndre Detsch ktime_get_ts(&ts); 234327ec41d3SAndre Detsch time += timespec_to_ns(&ts) - ctx->stats.tstamp; 234427ec41d3SAndre Detsch } 2345e9f8a0b6SChristoph Hellwig 234627ec41d3SAndre Detsch return time / NSEC_PER_MSEC; 2347e9f8a0b6SChristoph Hellwig } 2348e9f8a0b6SChristoph Hellwig 2349e9f8a0b6SChristoph Hellwig static unsigned long long spufs_slb_flts(struct spu_context *ctx) 2350e9f8a0b6SChristoph Hellwig { 2351e9f8a0b6SChristoph Hellwig unsigned long long slb_flts = ctx->stats.slb_flt; 2352e9f8a0b6SChristoph Hellwig 2353e9f8a0b6SChristoph Hellwig if (ctx->state == SPU_STATE_RUNNABLE) { 2354e9f8a0b6SChristoph Hellwig slb_flts += (ctx->spu->stats.slb_flt - 2355e9f8a0b6SChristoph Hellwig ctx->stats.slb_flt_base); 2356e9f8a0b6SChristoph Hellwig } 2357e9f8a0b6SChristoph Hellwig 2358e9f8a0b6SChristoph Hellwig return slb_flts; 2359e9f8a0b6SChristoph Hellwig } 2360e9f8a0b6SChristoph Hellwig 2361e9f8a0b6SChristoph Hellwig static unsigned long long spufs_class2_intrs(struct spu_context *ctx) 2362e9f8a0b6SChristoph Hellwig { 2363e9f8a0b6SChristoph Hellwig unsigned long long class2_intrs = ctx->stats.class2_intr; 2364e9f8a0b6SChristoph Hellwig 2365e9f8a0b6SChristoph Hellwig if (ctx->state == SPU_STATE_RUNNABLE) { 2366e9f8a0b6SChristoph Hellwig class2_intrs += (ctx->spu->stats.class2_intr - 2367e9f8a0b6SChristoph Hellwig ctx->stats.class2_intr_base); 2368e9f8a0b6SChristoph Hellwig } 2369e9f8a0b6SChristoph Hellwig 2370e9f8a0b6SChristoph Hellwig return class2_intrs; 2371e9f8a0b6SChristoph Hellwig } 2372e9f8a0b6SChristoph Hellwig 2373e9f8a0b6SChristoph Hellwig 2374e9f8a0b6SChristoph Hellwig static int spufs_show_stat(struct seq_file *s, void *private) 2375e9f8a0b6SChristoph Hellwig { 2376e9f8a0b6SChristoph Hellwig struct spu_context *ctx = s->private; 2377c9101bdbSChristoph Hellwig int ret; 2378e9f8a0b6SChristoph Hellwig 2379c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 2380c9101bdbSChristoph Hellwig if (ret) 2381c9101bdbSChristoph Hellwig return ret; 2382c9101bdbSChristoph Hellwig 2383e9f8a0b6SChristoph Hellwig seq_printf(s, "%s %llu %llu %llu %llu " 2384e9f8a0b6SChristoph Hellwig "%llu %llu %llu %llu %llu %llu %llu %llu\n", 238527ec41d3SAndre Detsch ctx_state_names[ctx->stats.util_state], 238627ec41d3SAndre Detsch spufs_acct_time(ctx, SPU_UTIL_USER), 238727ec41d3SAndre Detsch spufs_acct_time(ctx, SPU_UTIL_SYSTEM), 238827ec41d3SAndre Detsch spufs_acct_time(ctx, SPU_UTIL_IOWAIT), 238927ec41d3SAndre Detsch spufs_acct_time(ctx, SPU_UTIL_IDLE_LOADED), 2390e9f8a0b6SChristoph Hellwig ctx->stats.vol_ctx_switch, 2391e9f8a0b6SChristoph Hellwig ctx->stats.invol_ctx_switch, 2392e9f8a0b6SChristoph Hellwig spufs_slb_flts(ctx), 2393e9f8a0b6SChristoph Hellwig ctx->stats.hash_flt, 2394e9f8a0b6SChristoph Hellwig ctx->stats.min_flt, 2395e9f8a0b6SChristoph Hellwig ctx->stats.maj_flt, 2396e9f8a0b6SChristoph Hellwig spufs_class2_intrs(ctx), 2397e9f8a0b6SChristoph Hellwig ctx->stats.libassist); 2398e9f8a0b6SChristoph Hellwig spu_release(ctx); 2399e9f8a0b6SChristoph Hellwig return 0; 2400e9f8a0b6SChristoph Hellwig } 2401e9f8a0b6SChristoph Hellwig 2402e9f8a0b6SChristoph Hellwig static int spufs_stat_open(struct inode *inode, struct file *file) 2403e9f8a0b6SChristoph Hellwig { 2404e9f8a0b6SChristoph Hellwig return single_open(file, spufs_show_stat, SPUFS_I(inode)->i_ctx); 2405e9f8a0b6SChristoph Hellwig } 2406e9f8a0b6SChristoph Hellwig 2407e9f8a0b6SChristoph Hellwig static const struct file_operations spufs_stat_fops = { 2408e9f8a0b6SChristoph Hellwig .open = spufs_stat_open, 2409e9f8a0b6SChristoph Hellwig .read = seq_read, 2410e9f8a0b6SChristoph Hellwig .llseek = seq_lseek, 2411e9f8a0b6SChristoph Hellwig .release = single_release, 2412e9f8a0b6SChristoph Hellwig }; 2413e9f8a0b6SChristoph Hellwig 24145158e9b5SChristoph Hellwig static inline int spufs_switch_log_used(struct spu_context *ctx) 24155158e9b5SChristoph Hellwig { 24165158e9b5SChristoph Hellwig return (ctx->switch_log->head - ctx->switch_log->tail) % 24175158e9b5SChristoph Hellwig SWITCH_LOG_BUFSIZE; 24185158e9b5SChristoph Hellwig } 24195158e9b5SChristoph Hellwig 24205158e9b5SChristoph Hellwig static inline int spufs_switch_log_avail(struct spu_context *ctx) 24215158e9b5SChristoph Hellwig { 24225158e9b5SChristoph Hellwig return SWITCH_LOG_BUFSIZE - spufs_switch_log_used(ctx); 24235158e9b5SChristoph Hellwig } 24245158e9b5SChristoph Hellwig 24255158e9b5SChristoph Hellwig static int spufs_switch_log_open(struct inode *inode, struct file *file) 24265158e9b5SChristoph Hellwig { 24275158e9b5SChristoph Hellwig struct spu_context *ctx = SPUFS_I(inode)->i_ctx; 2428f5ed0eb6SJeremy Kerr int rc; 24295158e9b5SChristoph Hellwig 2430f5ed0eb6SJeremy Kerr rc = spu_acquire(ctx); 2431f5ed0eb6SJeremy Kerr if (rc) 2432f5ed0eb6SJeremy Kerr return rc; 2433f5ed0eb6SJeremy Kerr 24345158e9b5SChristoph Hellwig if (ctx->switch_log) { 2435f5ed0eb6SJeremy Kerr rc = -EBUSY; 2436f5ed0eb6SJeremy Kerr goto out; 2437f5ed0eb6SJeremy Kerr } 2438f5ed0eb6SJeremy Kerr 2439837ef884SJeremy Kerr ctx->switch_log = kmalloc(sizeof(struct switch_log) + 24405158e9b5SChristoph Hellwig SWITCH_LOG_BUFSIZE * sizeof(struct switch_log_entry), 24415158e9b5SChristoph Hellwig GFP_KERNEL); 2442f5ed0eb6SJeremy Kerr 2443f5ed0eb6SJeremy Kerr if (!ctx->switch_log) { 2444f5ed0eb6SJeremy Kerr rc = -ENOMEM; 24455158e9b5SChristoph Hellwig goto out; 24465158e9b5SChristoph Hellwig } 2447f5ed0eb6SJeremy Kerr 2448837ef884SJeremy Kerr ctx->switch_log->head = ctx->switch_log->tail = 0; 2449f5ed0eb6SJeremy Kerr init_waitqueue_head(&ctx->switch_log->wait); 2450f5ed0eb6SJeremy Kerr rc = 0; 2451f5ed0eb6SJeremy Kerr 2452f5ed0eb6SJeremy Kerr out: 2453f5ed0eb6SJeremy Kerr spu_release(ctx); 2454f5ed0eb6SJeremy Kerr return rc; 2455f5ed0eb6SJeremy Kerr } 2456f5ed0eb6SJeremy Kerr 2457f5ed0eb6SJeremy Kerr static int spufs_switch_log_release(struct inode *inode, struct file *file) 2458f5ed0eb6SJeremy Kerr { 2459f5ed0eb6SJeremy Kerr struct spu_context *ctx = SPUFS_I(inode)->i_ctx; 2460f5ed0eb6SJeremy Kerr int rc; 2461f5ed0eb6SJeremy Kerr 2462f5ed0eb6SJeremy Kerr rc = spu_acquire(ctx); 2463f5ed0eb6SJeremy Kerr if (rc) 2464f5ed0eb6SJeremy Kerr return rc; 2465f5ed0eb6SJeremy Kerr 2466f5ed0eb6SJeremy Kerr kfree(ctx->switch_log); 2467f5ed0eb6SJeremy Kerr ctx->switch_log = NULL; 2468f5ed0eb6SJeremy Kerr spu_release(ctx); 24695158e9b5SChristoph Hellwig 24705158e9b5SChristoph Hellwig return 0; 24715158e9b5SChristoph Hellwig } 24725158e9b5SChristoph Hellwig 24735158e9b5SChristoph Hellwig static int switch_log_sprint(struct spu_context *ctx, char *tbuf, int n) 24745158e9b5SChristoph Hellwig { 24755158e9b5SChristoph Hellwig struct switch_log_entry *p; 24765158e9b5SChristoph Hellwig 24775158e9b5SChristoph Hellwig p = ctx->switch_log->log + ctx->switch_log->tail % SWITCH_LOG_BUFSIZE; 24785158e9b5SChristoph Hellwig 24795158e9b5SChristoph Hellwig return snprintf(tbuf, n, "%u.%09u %d %u %u %llu\n", 24805158e9b5SChristoph Hellwig (unsigned int) p->tstamp.tv_sec, 24815158e9b5SChristoph Hellwig (unsigned int) p->tstamp.tv_nsec, 24825158e9b5SChristoph Hellwig p->spu_id, 24835158e9b5SChristoph Hellwig (unsigned int) p->type, 24845158e9b5SChristoph Hellwig (unsigned int) p->val, 24855158e9b5SChristoph Hellwig (unsigned long long) p->timebase); 24865158e9b5SChristoph Hellwig } 24875158e9b5SChristoph Hellwig 24885158e9b5SChristoph Hellwig static ssize_t spufs_switch_log_read(struct file *file, char __user *buf, 24895158e9b5SChristoph Hellwig size_t len, loff_t *ppos) 24905158e9b5SChristoph Hellwig { 24915158e9b5SChristoph Hellwig struct inode *inode = file->f_path.dentry->d_inode; 24925158e9b5SChristoph Hellwig struct spu_context *ctx = SPUFS_I(inode)->i_ctx; 24935158e9b5SChristoph Hellwig int error = 0, cnt = 0; 24945158e9b5SChristoph Hellwig 24955158e9b5SChristoph Hellwig if (!buf || len < 0) 24965158e9b5SChristoph Hellwig return -EINVAL; 24975158e9b5SChristoph Hellwig 2498f5ed0eb6SJeremy Kerr error = spu_acquire(ctx); 2499f5ed0eb6SJeremy Kerr if (error) 2500f5ed0eb6SJeremy Kerr return error; 2501f5ed0eb6SJeremy Kerr 25025158e9b5SChristoph Hellwig while (cnt < len) { 25035158e9b5SChristoph Hellwig char tbuf[128]; 25045158e9b5SChristoph Hellwig int width; 25055158e9b5SChristoph Hellwig 2506f5ed0eb6SJeremy Kerr if (spufs_switch_log_used(ctx) == 0) { 250714f693eeSJeremy Kerr if (cnt > 0) { 250814f693eeSJeremy Kerr /* If there's data ready to go, we can 250914f693eeSJeremy Kerr * just return straight away */ 251014f693eeSJeremy Kerr break; 251114f693eeSJeremy Kerr 251214f693eeSJeremy Kerr } else if (file->f_flags & O_NONBLOCK) { 2513f5ed0eb6SJeremy Kerr error = -EAGAIN; 25145158e9b5SChristoph Hellwig break; 251514f693eeSJeremy Kerr 2516f5ed0eb6SJeremy Kerr } else { 251714f693eeSJeremy Kerr /* spufs_wait will drop the mutex and 251814f693eeSJeremy Kerr * re-acquire, but since we're in read(), the 251914f693eeSJeremy Kerr * file cannot be _released (and so 252014f693eeSJeremy Kerr * ctx->switch_log is stable). 2521f5ed0eb6SJeremy Kerr */ 2522f5ed0eb6SJeremy Kerr error = spufs_wait(ctx->switch_log->wait, 2523f5ed0eb6SJeremy Kerr spufs_switch_log_used(ctx) > 0); 25245158e9b5SChristoph Hellwig 2525f5ed0eb6SJeremy Kerr /* On error, spufs_wait returns without the 2526f5ed0eb6SJeremy Kerr * state mutex held */ 2527f5ed0eb6SJeremy Kerr if (error) 2528f5ed0eb6SJeremy Kerr return error; 25295158e9b5SChristoph Hellwig 253014f693eeSJeremy Kerr /* We may have had entries read from underneath 253114f693eeSJeremy Kerr * us while we dropped the mutex in spufs_wait, 253214f693eeSJeremy Kerr * so re-check */ 253314f693eeSJeremy Kerr if (spufs_switch_log_used(ctx) == 0) 2534f5ed0eb6SJeremy Kerr continue; 253514f693eeSJeremy Kerr } 253614f693eeSJeremy Kerr } 2537f5ed0eb6SJeremy Kerr 25385158e9b5SChristoph Hellwig width = switch_log_sprint(ctx, tbuf, sizeof(tbuf)); 2539f5ed0eb6SJeremy Kerr if (width < len) 25405158e9b5SChristoph Hellwig ctx->switch_log->tail = 25415158e9b5SChristoph Hellwig (ctx->switch_log->tail + 1) % 25425158e9b5SChristoph Hellwig SWITCH_LOG_BUFSIZE; 2543f5ed0eb6SJeremy Kerr else 2544f5ed0eb6SJeremy Kerr /* If the record is greater than space available return 2545f5ed0eb6SJeremy Kerr * partial buffer (so far) */ 25465158e9b5SChristoph Hellwig break; 25475158e9b5SChristoph Hellwig 25485158e9b5SChristoph Hellwig error = copy_to_user(buf + cnt, tbuf, width); 25495158e9b5SChristoph Hellwig if (error) 25505158e9b5SChristoph Hellwig break; 25515158e9b5SChristoph Hellwig cnt += width; 25525158e9b5SChristoph Hellwig } 25535158e9b5SChristoph Hellwig 2554f5ed0eb6SJeremy Kerr spu_release(ctx); 2555f5ed0eb6SJeremy Kerr 25565158e9b5SChristoph Hellwig return cnt == 0 ? error : cnt; 25575158e9b5SChristoph Hellwig } 25585158e9b5SChristoph Hellwig 25595158e9b5SChristoph Hellwig static unsigned int spufs_switch_log_poll(struct file *file, poll_table *wait) 25605158e9b5SChristoph Hellwig { 25615158e9b5SChristoph Hellwig struct inode *inode = file->f_path.dentry->d_inode; 25625158e9b5SChristoph Hellwig struct spu_context *ctx = SPUFS_I(inode)->i_ctx; 25635158e9b5SChristoph Hellwig unsigned int mask = 0; 2564f5ed0eb6SJeremy Kerr int rc; 25655158e9b5SChristoph Hellwig 25665158e9b5SChristoph Hellwig poll_wait(file, &ctx->switch_log->wait, wait); 25675158e9b5SChristoph Hellwig 2568f5ed0eb6SJeremy Kerr rc = spu_acquire(ctx); 2569f5ed0eb6SJeremy Kerr if (rc) 2570f5ed0eb6SJeremy Kerr return rc; 2571f5ed0eb6SJeremy Kerr 25725158e9b5SChristoph Hellwig if (spufs_switch_log_used(ctx) > 0) 25735158e9b5SChristoph Hellwig mask |= POLLIN; 25745158e9b5SChristoph Hellwig 2575f5ed0eb6SJeremy Kerr spu_release(ctx); 2576f5ed0eb6SJeremy Kerr 25775158e9b5SChristoph Hellwig return mask; 25785158e9b5SChristoph Hellwig } 25795158e9b5SChristoph Hellwig 25805158e9b5SChristoph Hellwig static const struct file_operations spufs_switch_log_fops = { 25815158e9b5SChristoph Hellwig .owner = THIS_MODULE, 25825158e9b5SChristoph Hellwig .open = spufs_switch_log_open, 25835158e9b5SChristoph Hellwig .read = spufs_switch_log_read, 25845158e9b5SChristoph Hellwig .poll = spufs_switch_log_poll, 2585f5ed0eb6SJeremy Kerr .release = spufs_switch_log_release, 25865158e9b5SChristoph Hellwig }; 25875158e9b5SChristoph Hellwig 2588f5ed0eb6SJeremy Kerr /** 2589f5ed0eb6SJeremy Kerr * Log a context switch event to a switch log reader. 2590f5ed0eb6SJeremy Kerr * 2591f5ed0eb6SJeremy Kerr * Must be called with ctx->state_mutex held. 2592f5ed0eb6SJeremy Kerr */ 25935158e9b5SChristoph Hellwig void spu_switch_log_notify(struct spu *spu, struct spu_context *ctx, 25945158e9b5SChristoph Hellwig u32 type, u32 val) 25955158e9b5SChristoph Hellwig { 25965158e9b5SChristoph Hellwig if (!ctx->switch_log) 25975158e9b5SChristoph Hellwig return; 25985158e9b5SChristoph Hellwig 25995158e9b5SChristoph Hellwig if (spufs_switch_log_avail(ctx) > 1) { 26005158e9b5SChristoph Hellwig struct switch_log_entry *p; 26015158e9b5SChristoph Hellwig 26025158e9b5SChristoph Hellwig p = ctx->switch_log->log + ctx->switch_log->head; 26035158e9b5SChristoph Hellwig ktime_get_ts(&p->tstamp); 26045158e9b5SChristoph Hellwig p->timebase = get_tb(); 26055158e9b5SChristoph Hellwig p->spu_id = spu ? spu->number : -1; 26065158e9b5SChristoph Hellwig p->type = type; 26075158e9b5SChristoph Hellwig p->val = val; 26085158e9b5SChristoph Hellwig 26095158e9b5SChristoph Hellwig ctx->switch_log->head = 26105158e9b5SChristoph Hellwig (ctx->switch_log->head + 1) % SWITCH_LOG_BUFSIZE; 26115158e9b5SChristoph Hellwig } 26125158e9b5SChristoph Hellwig 26135158e9b5SChristoph Hellwig wake_up(&ctx->switch_log->wait); 26145158e9b5SChristoph Hellwig } 2615e9f8a0b6SChristoph Hellwig 261646deed69SLuke Browning static int spufs_show_ctx(struct seq_file *s, void *private) 261746deed69SLuke Browning { 261846deed69SLuke Browning struct spu_context *ctx = s->private; 261946deed69SLuke Browning u64 mfc_control_RW; 262046deed69SLuke Browning 262146deed69SLuke Browning mutex_lock(&ctx->state_mutex); 262246deed69SLuke Browning if (ctx->spu) { 262346deed69SLuke Browning struct spu *spu = ctx->spu; 262446deed69SLuke Browning struct spu_priv2 __iomem *priv2 = spu->priv2; 262546deed69SLuke Browning 262646deed69SLuke Browning spin_lock_irq(&spu->register_lock); 262746deed69SLuke Browning mfc_control_RW = in_be64(&priv2->mfc_control_RW); 262846deed69SLuke Browning spin_unlock_irq(&spu->register_lock); 262946deed69SLuke Browning } else { 263046deed69SLuke Browning struct spu_state *csa = &ctx->csa; 263146deed69SLuke Browning 263246deed69SLuke Browning mfc_control_RW = csa->priv2.mfc_control_RW; 263346deed69SLuke Browning } 263446deed69SLuke Browning 263546deed69SLuke Browning seq_printf(s, "%c flgs(%lx) sflgs(%lx) pri(%d) ts(%d) spu(%02d)" 26369477e455SStephen Rothwell " %c %llx %llx %llx %llx %x %x\n", 263746deed69SLuke Browning ctx->state == SPU_STATE_SAVED ? 'S' : 'R', 263846deed69SLuke Browning ctx->flags, 263946deed69SLuke Browning ctx->sched_flags, 264046deed69SLuke Browning ctx->prio, 264146deed69SLuke Browning ctx->time_slice, 264246deed69SLuke Browning ctx->spu ? ctx->spu->number : -1, 264346deed69SLuke Browning !list_empty(&ctx->rq) ? 'q' : ' ', 264446deed69SLuke Browning ctx->csa.class_0_pending, 264546deed69SLuke Browning ctx->csa.class_0_dar, 264646deed69SLuke Browning ctx->csa.class_1_dsisr, 264746deed69SLuke Browning mfc_control_RW, 264846deed69SLuke Browning ctx->ops->runcntl_read(ctx), 264946deed69SLuke Browning ctx->ops->status_read(ctx)); 265046deed69SLuke Browning 265146deed69SLuke Browning mutex_unlock(&ctx->state_mutex); 265246deed69SLuke Browning 265346deed69SLuke Browning return 0; 265446deed69SLuke Browning } 265546deed69SLuke Browning 265646deed69SLuke Browning static int spufs_ctx_open(struct inode *inode, struct file *file) 265746deed69SLuke Browning { 265846deed69SLuke Browning return single_open(file, spufs_show_ctx, SPUFS_I(inode)->i_ctx); 265946deed69SLuke Browning } 266046deed69SLuke Browning 266146deed69SLuke Browning static const struct file_operations spufs_ctx_fops = { 266246deed69SLuke Browning .open = spufs_ctx_open, 266346deed69SLuke Browning .read = seq_read, 266446deed69SLuke Browning .llseek = seq_lseek, 266546deed69SLuke Browning .release = single_release, 266646deed69SLuke Browning }; 266746deed69SLuke Browning 266823d893f5SJeremy Kerr struct spufs_tree_descr spufs_dir_contents[] = { 2669cbe709c1SBenjamin Herrenschmidt { "capabilities", &spufs_caps_fops, 0444, }, 26706f7dde81SJeremy Kerr { "mem", &spufs_mem_fops, 0666, LS_SIZE, }, 26716f7dde81SJeremy Kerr { "regs", &spufs_regs_fops, 0666, sizeof(struct spu_reg128[128]), }, 267267207b96SArnd Bergmann { "mbox", &spufs_mbox_fops, 0444, }, 267367207b96SArnd Bergmann { "ibox", &spufs_ibox_fops, 0444, }, 267467207b96SArnd Bergmann { "wbox", &spufs_wbox_fops, 0222, }, 26756f7dde81SJeremy Kerr { "mbox_stat", &spufs_mbox_stat_fops, 0444, sizeof(u32), }, 26766f7dde81SJeremy Kerr { "ibox_stat", &spufs_ibox_stat_fops, 0444, sizeof(u32), }, 26776f7dde81SJeremy Kerr { "wbox_stat", &spufs_wbox_stat_fops, 0444, sizeof(u32), }, 2678603c4612SJeremy Kerr { "signal1", &spufs_signal1_fops, 0666, }, 2679603c4612SJeremy Kerr { "signal2", &spufs_signal2_fops, 0666, }, 268067207b96SArnd Bergmann { "signal1_type", &spufs_signal1_type, 0666, }, 268167207b96SArnd Bergmann { "signal2_type", &spufs_signal2_type, 0666, }, 26826df10a82SMark Nutter { "cntl", &spufs_cntl_fops, 0666, }, 26836f7dde81SJeremy Kerr { "fpcr", &spufs_fpcr_fops, 0666, sizeof(struct spu_reg128), }, 2684b9e3bd77SDwayne Grant McConnell { "lslr", &spufs_lslr_ops, 0444, }, 2685b9e3bd77SDwayne Grant McConnell { "mfc", &spufs_mfc_fops, 0666, }, 2686b9e3bd77SDwayne Grant McConnell { "mss", &spufs_mss_fops, 0666, }, 2687b9e3bd77SDwayne Grant McConnell { "npc", &spufs_npc_ops, 0666, }, 2688b9e3bd77SDwayne Grant McConnell { "srr0", &spufs_srr0_ops, 0666, }, 26898b3d6663SArnd Bergmann { "decr", &spufs_decr_ops, 0666, }, 26908b3d6663SArnd Bergmann { "decr_status", &spufs_decr_status_ops, 0666, }, 26918b3d6663SArnd Bergmann { "event_mask", &spufs_event_mask_ops, 0666, }, 2692b9e3bd77SDwayne Grant McConnell { "event_status", &spufs_event_status_ops, 0444, }, 26936f7dde81SJeremy Kerr { "psmap", &spufs_psmap_fops, 0666, SPUFS_PS_MAP_SIZE, }, 269486767277SArnd Bergmann { "phys-id", &spufs_id_ops, 0666, }, 269586767277SArnd Bergmann { "object-id", &spufs_object_id_ops, 0666, }, 26966f7dde81SJeremy Kerr { "mbox_info", &spufs_mbox_info_fops, 0444, sizeof(u32), }, 26976f7dde81SJeremy Kerr { "ibox_info", &spufs_ibox_info_fops, 0444, sizeof(u32), }, 26986f7dde81SJeremy Kerr { "wbox_info", &spufs_wbox_info_fops, 0444, sizeof(u32), }, 26996f7dde81SJeremy Kerr { "dma_info", &spufs_dma_info_fops, 0444, 27006f7dde81SJeremy Kerr sizeof(struct spu_dma_info), }, 27016f7dde81SJeremy Kerr { "proxydma_info", &spufs_proxydma_info_fops, 0444, 27026f7dde81SJeremy Kerr sizeof(struct spu_proxydma_info)}, 2703476273adSChristoph Hellwig { "tid", &spufs_tid_fops, 0444, }, 2704e9f8a0b6SChristoph Hellwig { "stat", &spufs_stat_fops, 0444, }, 27055158e9b5SChristoph Hellwig { "switch_log", &spufs_switch_log_fops, 0444 }, 270667207b96SArnd Bergmann {}, 270767207b96SArnd Bergmann }; 27085737edd1SMark Nutter 270923d893f5SJeremy Kerr struct spufs_tree_descr spufs_dir_nosched_contents[] = { 2710cbe709c1SBenjamin Herrenschmidt { "capabilities", &spufs_caps_fops, 0444, }, 27116f7dde81SJeremy Kerr { "mem", &spufs_mem_fops, 0666, LS_SIZE, }, 27125737edd1SMark Nutter { "mbox", &spufs_mbox_fops, 0444, }, 27135737edd1SMark Nutter { "ibox", &spufs_ibox_fops, 0444, }, 27145737edd1SMark Nutter { "wbox", &spufs_wbox_fops, 0222, }, 27156f7dde81SJeremy Kerr { "mbox_stat", &spufs_mbox_stat_fops, 0444, sizeof(u32), }, 27166f7dde81SJeremy Kerr { "ibox_stat", &spufs_ibox_stat_fops, 0444, sizeof(u32), }, 27176f7dde81SJeremy Kerr { "wbox_stat", &spufs_wbox_stat_fops, 0444, sizeof(u32), }, 2718d054b36fSJeremy Kerr { "signal1", &spufs_signal1_nosched_fops, 0222, }, 2719d054b36fSJeremy Kerr { "signal2", &spufs_signal2_nosched_fops, 0222, }, 27205737edd1SMark Nutter { "signal1_type", &spufs_signal1_type, 0666, }, 27215737edd1SMark Nutter { "signal2_type", &spufs_signal2_type, 0666, }, 27225737edd1SMark Nutter { "mss", &spufs_mss_fops, 0666, }, 27235737edd1SMark Nutter { "mfc", &spufs_mfc_fops, 0666, }, 27245737edd1SMark Nutter { "cntl", &spufs_cntl_fops, 0666, }, 27255737edd1SMark Nutter { "npc", &spufs_npc_ops, 0666, }, 27266f7dde81SJeremy Kerr { "psmap", &spufs_psmap_fops, 0666, SPUFS_PS_MAP_SIZE, }, 27275737edd1SMark Nutter { "phys-id", &spufs_id_ops, 0666, }, 27285737edd1SMark Nutter { "object-id", &spufs_object_id_ops, 0666, }, 2729476273adSChristoph Hellwig { "tid", &spufs_tid_fops, 0444, }, 2730e9f8a0b6SChristoph Hellwig { "stat", &spufs_stat_fops, 0444, }, 27312c3e4787SJeremy Kerr {}, 27322c3e4787SJeremy Kerr }; 27332c3e4787SJeremy Kerr 27342c3e4787SJeremy Kerr struct spufs_tree_descr spufs_dir_debug_contents[] = { 273546deed69SLuke Browning { ".ctx", &spufs_ctx_fops, 0444, }, 27365737edd1SMark Nutter {}, 27375737edd1SMark Nutter }; 2738bf1ab978SDwayne Grant McConnell 2739bf1ab978SDwayne Grant McConnell struct spufs_coredump_reader spufs_coredump_read[] = { 27404fca9c42SMichael Ellerman { "regs", __spufs_regs_read, NULL, sizeof(struct spu_reg128[128])}, 27414fca9c42SMichael Ellerman { "fpcr", __spufs_fpcr_read, NULL, sizeof(struct spu_reg128) }, 2742104f0cc2SMichael Ellerman { "lslr", NULL, spufs_lslr_get, 19 }, 2743104f0cc2SMichael Ellerman { "decr", NULL, spufs_decr_get, 19 }, 2744104f0cc2SMichael Ellerman { "decr_status", NULL, spufs_decr_status_get, 19 }, 27454fca9c42SMichael Ellerman { "mem", __spufs_mem_read, NULL, LS_SIZE, }, 27464fca9c42SMichael Ellerman { "signal1", __spufs_signal1_read, NULL, sizeof(u32) }, 2747104f0cc2SMichael Ellerman { "signal1_type", NULL, spufs_signal1_type_get, 19 }, 27484fca9c42SMichael Ellerman { "signal2", __spufs_signal2_read, NULL, sizeof(u32) }, 2749104f0cc2SMichael Ellerman { "signal2_type", NULL, spufs_signal2_type_get, 19 }, 2750104f0cc2SMichael Ellerman { "event_mask", NULL, spufs_event_mask_get, 19 }, 2751104f0cc2SMichael Ellerman { "event_status", NULL, spufs_event_status_get, 19 }, 27524fca9c42SMichael Ellerman { "mbox_info", __spufs_mbox_info_read, NULL, sizeof(u32) }, 27534fca9c42SMichael Ellerman { "ibox_info", __spufs_ibox_info_read, NULL, sizeof(u32) }, 27544fca9c42SMichael Ellerman { "wbox_info", __spufs_wbox_info_read, NULL, 4 * sizeof(u32)}, 27554fca9c42SMichael Ellerman { "dma_info", __spufs_dma_info_read, NULL, sizeof(struct spu_dma_info)}, 27564fca9c42SMichael Ellerman { "proxydma_info", __spufs_proxydma_info_read, 27574fca9c42SMichael Ellerman NULL, sizeof(struct spu_proxydma_info)}, 2758104f0cc2SMichael Ellerman { "object-id", NULL, spufs_object_id_get, 19 }, 2759104f0cc2SMichael Ellerman { "npc", NULL, spufs_npc_get, 19 }, 2760936d5bf1SMichael Ellerman { NULL }, 2761bf1ab978SDwayne Grant McConnell }; 2762