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> 274b16f8e2SPaul Gortmaker #include <linux/export.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> 325a0e3ad6STejun Heo #include <linux/slab.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" 41ae142e0cSChristoph Hellwig #include "sputrace.h" 4267207b96SArnd Bergmann 4327d5bf2aSBenjamin Herrenschmidt #define SPUFS_MMAP_4K (PAGE_SIZE == 0x1000) 4427d5bf2aSBenjamin Herrenschmidt 45197b1a82SChristoph Hellwig /* Simple attribute files */ 46197b1a82SChristoph Hellwig struct spufs_attr { 47197b1a82SChristoph Hellwig int (*get)(void *, u64 *); 48197b1a82SChristoph Hellwig int (*set)(void *, u64); 49197b1a82SChristoph Hellwig char get_buf[24]; /* enough to store a u64 and "\n\0" */ 50197b1a82SChristoph Hellwig char set_buf[24]; 51197b1a82SChristoph Hellwig void *data; 52197b1a82SChristoph Hellwig const char *fmt; /* format for read operation */ 53197b1a82SChristoph Hellwig struct mutex mutex; /* protects access to these buffers */ 54197b1a82SChristoph Hellwig }; 55197b1a82SChristoph Hellwig 56197b1a82SChristoph Hellwig static int spufs_attr_open(struct inode *inode, struct file *file, 57197b1a82SChristoph Hellwig int (*get)(void *, u64 *), int (*set)(void *, u64), 58197b1a82SChristoph Hellwig const char *fmt) 59197b1a82SChristoph Hellwig { 60197b1a82SChristoph Hellwig struct spufs_attr *attr; 61197b1a82SChristoph Hellwig 62197b1a82SChristoph Hellwig attr = kmalloc(sizeof(*attr), GFP_KERNEL); 63197b1a82SChristoph Hellwig if (!attr) 64197b1a82SChristoph Hellwig return -ENOMEM; 65197b1a82SChristoph Hellwig 66197b1a82SChristoph Hellwig attr->get = get; 67197b1a82SChristoph Hellwig attr->set = set; 68197b1a82SChristoph Hellwig attr->data = inode->i_private; 69197b1a82SChristoph Hellwig attr->fmt = fmt; 70197b1a82SChristoph Hellwig mutex_init(&attr->mutex); 71197b1a82SChristoph Hellwig file->private_data = attr; 72197b1a82SChristoph Hellwig 73197b1a82SChristoph Hellwig return nonseekable_open(inode, file); 74197b1a82SChristoph Hellwig } 75197b1a82SChristoph Hellwig 76197b1a82SChristoph Hellwig static int spufs_attr_release(struct inode *inode, struct file *file) 77197b1a82SChristoph Hellwig { 78197b1a82SChristoph Hellwig kfree(file->private_data); 79197b1a82SChristoph Hellwig return 0; 80197b1a82SChristoph Hellwig } 81197b1a82SChristoph Hellwig 82197b1a82SChristoph Hellwig static ssize_t spufs_attr_read(struct file *file, char __user *buf, 83197b1a82SChristoph Hellwig size_t len, loff_t *ppos) 84197b1a82SChristoph Hellwig { 85197b1a82SChristoph Hellwig struct spufs_attr *attr; 86197b1a82SChristoph Hellwig size_t size; 87197b1a82SChristoph Hellwig ssize_t ret; 88197b1a82SChristoph Hellwig 89197b1a82SChristoph Hellwig attr = file->private_data; 90197b1a82SChristoph Hellwig if (!attr->get) 91197b1a82SChristoph Hellwig return -EACCES; 92197b1a82SChristoph Hellwig 93197b1a82SChristoph Hellwig ret = mutex_lock_interruptible(&attr->mutex); 94197b1a82SChristoph Hellwig if (ret) 95197b1a82SChristoph Hellwig return ret; 96197b1a82SChristoph Hellwig 97197b1a82SChristoph Hellwig if (*ppos) { /* continued read */ 98197b1a82SChristoph Hellwig size = strlen(attr->get_buf); 99197b1a82SChristoph Hellwig } else { /* first read */ 100197b1a82SChristoph Hellwig u64 val; 101197b1a82SChristoph Hellwig ret = attr->get(attr->data, &val); 102197b1a82SChristoph Hellwig if (ret) 103197b1a82SChristoph Hellwig goto out; 104197b1a82SChristoph Hellwig 105197b1a82SChristoph Hellwig size = scnprintf(attr->get_buf, sizeof(attr->get_buf), 106197b1a82SChristoph Hellwig attr->fmt, (unsigned long long)val); 107197b1a82SChristoph Hellwig } 108197b1a82SChristoph Hellwig 109197b1a82SChristoph Hellwig ret = simple_read_from_buffer(buf, len, ppos, attr->get_buf, size); 110197b1a82SChristoph Hellwig out: 111197b1a82SChristoph Hellwig mutex_unlock(&attr->mutex); 112197b1a82SChristoph Hellwig return ret; 113197b1a82SChristoph Hellwig } 114197b1a82SChristoph Hellwig 115197b1a82SChristoph Hellwig static ssize_t spufs_attr_write(struct file *file, const char __user *buf, 116197b1a82SChristoph Hellwig size_t len, loff_t *ppos) 117197b1a82SChristoph Hellwig { 118197b1a82SChristoph Hellwig struct spufs_attr *attr; 119197b1a82SChristoph Hellwig u64 val; 120197b1a82SChristoph Hellwig size_t size; 121197b1a82SChristoph Hellwig ssize_t ret; 122197b1a82SChristoph Hellwig 123197b1a82SChristoph Hellwig attr = file->private_data; 124197b1a82SChristoph Hellwig if (!attr->set) 125197b1a82SChristoph Hellwig return -EACCES; 126197b1a82SChristoph Hellwig 127197b1a82SChristoph Hellwig ret = mutex_lock_interruptible(&attr->mutex); 128197b1a82SChristoph Hellwig if (ret) 129197b1a82SChristoph Hellwig return ret; 130197b1a82SChristoph Hellwig 131197b1a82SChristoph Hellwig ret = -EFAULT; 132197b1a82SChristoph Hellwig size = min(sizeof(attr->set_buf) - 1, len); 133197b1a82SChristoph Hellwig if (copy_from_user(attr->set_buf, buf, size)) 134197b1a82SChristoph Hellwig goto out; 135197b1a82SChristoph Hellwig 136197b1a82SChristoph Hellwig ret = len; /* claim we got the whole input */ 137197b1a82SChristoph Hellwig attr->set_buf[size] = '\0'; 138197b1a82SChristoph Hellwig val = simple_strtol(attr->set_buf, NULL, 0); 139197b1a82SChristoph Hellwig attr->set(attr->data, val); 140197b1a82SChristoph Hellwig out: 141197b1a82SChristoph Hellwig mutex_unlock(&attr->mutex); 142197b1a82SChristoph Hellwig return ret; 143197b1a82SChristoph Hellwig } 144197b1a82SChristoph Hellwig 145197b1a82SChristoph Hellwig #define DEFINE_SPUFS_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt) \ 146197b1a82SChristoph Hellwig static int __fops ## _open(struct inode *inode, struct file *file) \ 147197b1a82SChristoph Hellwig { \ 148197b1a82SChristoph Hellwig __simple_attr_check_format(__fmt, 0ull); \ 149197b1a82SChristoph Hellwig return spufs_attr_open(inode, file, __get, __set, __fmt); \ 150197b1a82SChristoph Hellwig } \ 151828c0950SAlexey Dobriyan static const struct file_operations __fops = { \ 152197b1a82SChristoph Hellwig .open = __fops ## _open, \ 153197b1a82SChristoph Hellwig .release = spufs_attr_release, \ 154197b1a82SChristoph Hellwig .read = spufs_attr_read, \ 155197b1a82SChristoph Hellwig .write = spufs_attr_write, \ 156fc15351dSArnd Bergmann .llseek = generic_file_llseek, \ 157197b1a82SChristoph Hellwig }; 158197b1a82SChristoph Hellwig 159cbe709c1SBenjamin Herrenschmidt 16067207b96SArnd Bergmann static int 16167207b96SArnd Bergmann spufs_mem_open(struct inode *inode, struct file *file) 16267207b96SArnd Bergmann { 16367207b96SArnd Bergmann struct spufs_inode_info *i = SPUFS_I(inode); 1646df10a82SMark Nutter struct spu_context *ctx = i->i_ctx; 16543c2bbd9SChristoph Hellwig 16647d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 1676df10a82SMark Nutter file->private_data = ctx; 16843c2bbd9SChristoph Hellwig if (!i->i_openers++) 1696df10a82SMark Nutter ctx->local_store = inode->i_mapping; 17047d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 17143c2bbd9SChristoph Hellwig return 0; 17243c2bbd9SChristoph Hellwig } 17343c2bbd9SChristoph Hellwig 17443c2bbd9SChristoph Hellwig static int 17543c2bbd9SChristoph Hellwig spufs_mem_release(struct inode *inode, struct file *file) 17643c2bbd9SChristoph Hellwig { 17743c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 17843c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 17943c2bbd9SChristoph Hellwig 18047d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 18143c2bbd9SChristoph Hellwig if (!--i->i_openers) 18243c2bbd9SChristoph Hellwig ctx->local_store = NULL; 18347d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 18467207b96SArnd Bergmann return 0; 18567207b96SArnd Bergmann } 18667207b96SArnd Bergmann 18767207b96SArnd Bergmann static ssize_t 188bf1ab978SDwayne Grant McConnell __spufs_mem_read(struct spu_context *ctx, char __user *buffer, 189bf1ab978SDwayne Grant McConnell size_t size, loff_t *pos) 190bf1ab978SDwayne Grant McConnell { 191bf1ab978SDwayne Grant McConnell char *local_store = ctx->ops->get_ls(ctx); 192bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buffer, size, pos, local_store, 193bf1ab978SDwayne Grant McConnell LS_SIZE); 194bf1ab978SDwayne Grant McConnell } 195bf1ab978SDwayne Grant McConnell 196bf1ab978SDwayne Grant McConnell static ssize_t 19767207b96SArnd Bergmann spufs_mem_read(struct file *file, char __user *buffer, 19867207b96SArnd Bergmann size_t size, loff_t *pos) 19967207b96SArnd Bergmann { 200bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 201aa0ed2bdSArnd Bergmann ssize_t ret; 20267207b96SArnd Bergmann 203c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 204c9101bdbSChristoph Hellwig if (ret) 205c9101bdbSChristoph Hellwig return ret; 206bf1ab978SDwayne Grant McConnell ret = __spufs_mem_read(ctx, buffer, size, pos); 2078b3d6663SArnd Bergmann spu_release(ctx); 208c9101bdbSChristoph Hellwig 20967207b96SArnd Bergmann return ret; 21067207b96SArnd Bergmann } 21167207b96SArnd Bergmann 21267207b96SArnd Bergmann static ssize_t 21367207b96SArnd Bergmann spufs_mem_write(struct file *file, const char __user *buffer, 214aa0ed2bdSArnd Bergmann size_t size, loff_t *ppos) 21567207b96SArnd Bergmann { 21667207b96SArnd Bergmann struct spu_context *ctx = file->private_data; 2178b3d6663SArnd Bergmann char *local_store; 218aa0ed2bdSArnd Bergmann loff_t pos = *ppos; 2198b3d6663SArnd Bergmann int ret; 22067207b96SArnd Bergmann 221aa0ed2bdSArnd Bergmann if (pos > LS_SIZE) 22267207b96SArnd Bergmann return -EFBIG; 2238b3d6663SArnd Bergmann 224c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 225c9101bdbSChristoph Hellwig if (ret) 226c9101bdbSChristoph Hellwig return ret; 227c9101bdbSChristoph Hellwig 2288b3d6663SArnd Bergmann local_store = ctx->ops->get_ls(ctx); 22963c3b9d7SAkinobu Mita size = simple_write_to_buffer(local_store, LS_SIZE, ppos, buffer, size); 2308b3d6663SArnd Bergmann spu_release(ctx); 231aa0ed2bdSArnd Bergmann 232aa0ed2bdSArnd Bergmann return size; 23367207b96SArnd Bergmann } 23467207b96SArnd Bergmann 235b1e2270fSNick Piggin static int 236b1e2270fSNick Piggin spufs_mem_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 2378b3d6663SArnd Bergmann { 2388b3d6663SArnd Bergmann struct spu_context *ctx = vma->vm_file->private_data; 239b1e2270fSNick Piggin unsigned long address = (unsigned long)vmf->virtual_address; 240b1e2270fSNick Piggin unsigned long pfn, offset; 241b1e2270fSNick Piggin 242f1fa74f4SBenjamin Herrenschmidt #ifdef CONFIG_SPU_FS_64K_LS 243f1fa74f4SBenjamin Herrenschmidt struct spu_state *csa = &ctx->csa; 244f1fa74f4SBenjamin Herrenschmidt int psize; 24578bde53eSBenjamin Herrenschmidt 246f1fa74f4SBenjamin Herrenschmidt /* Check what page size we are using */ 247f1fa74f4SBenjamin Herrenschmidt psize = get_slice_psize(vma->vm_mm, address); 2488b3d6663SArnd Bergmann 249f1fa74f4SBenjamin Herrenschmidt /* Some sanity checking */ 250f1fa74f4SBenjamin Herrenschmidt BUG_ON(csa->use_big_pages != (psize == MMU_PAGE_64K)); 251f1fa74f4SBenjamin Herrenschmidt 252f1fa74f4SBenjamin Herrenschmidt /* Wow, 64K, cool, we need to align the address though */ 253f1fa74f4SBenjamin Herrenschmidt if (csa->use_big_pages) { 254f1fa74f4SBenjamin Herrenschmidt BUG_ON(vma->vm_start & 0xffff); 255f1fa74f4SBenjamin Herrenschmidt address &= ~0xfffful; 256f1fa74f4SBenjamin Herrenschmidt } 257f1fa74f4SBenjamin Herrenschmidt #endif /* CONFIG_SPU_FS_64K_LS */ 258f1fa74f4SBenjamin Herrenschmidt 259b1e2270fSNick Piggin offset = vmf->pgoff << PAGE_SHIFT; 260128b8546SMasato Noguchi if (offset >= LS_SIZE) 261b1e2270fSNick Piggin return VM_FAULT_SIGBUS; 262128b8546SMasato Noguchi 263b1e2270fSNick Piggin pr_debug("spufs_mem_mmap_fault address=0x%lx, offset=0x%lx\n", 264b1e2270fSNick Piggin address, offset); 265f1fa74f4SBenjamin Herrenschmidt 266c9101bdbSChristoph Hellwig if (spu_acquire(ctx)) 267b1e2270fSNick Piggin return VM_FAULT_NOPAGE; 2688b3d6663SArnd Bergmann 269ac91cb8dSArnd Bergmann if (ctx->state == SPU_STATE_SAVED) { 27064b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_cached(vma->vm_page_prot); 27178bde53eSBenjamin Herrenschmidt pfn = vmalloc_to_pfn(ctx->csa.lscsa->ls + offset); 272ac91cb8dSArnd Bergmann } else { 27364b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached_wc(vma->vm_page_prot); 27478bde53eSBenjamin Herrenschmidt pfn = (ctx->spu->local_store_phys + offset) >> PAGE_SHIFT; 275ac91cb8dSArnd Bergmann } 27678bde53eSBenjamin Herrenschmidt vm_insert_pfn(vma, address, pfn); 27778bde53eSBenjamin Herrenschmidt 2788b3d6663SArnd Bergmann spu_release(ctx); 2798b3d6663SArnd Bergmann 280b1e2270fSNick Piggin return VM_FAULT_NOPAGE; 2818b3d6663SArnd Bergmann } 2828b3d6663SArnd Bergmann 283a352894dSBenjamin Herrenschmidt static int spufs_mem_mmap_access(struct vm_area_struct *vma, 284a352894dSBenjamin Herrenschmidt unsigned long address, 285a352894dSBenjamin Herrenschmidt void *buf, int len, int write) 286a352894dSBenjamin Herrenschmidt { 287a352894dSBenjamin Herrenschmidt struct spu_context *ctx = vma->vm_file->private_data; 288a352894dSBenjamin Herrenschmidt unsigned long offset = address - vma->vm_start; 289a352894dSBenjamin Herrenschmidt char *local_store; 290a352894dSBenjamin Herrenschmidt 291a352894dSBenjamin Herrenschmidt if (write && !(vma->vm_flags & VM_WRITE)) 292a352894dSBenjamin Herrenschmidt return -EACCES; 293a352894dSBenjamin Herrenschmidt if (spu_acquire(ctx)) 294a352894dSBenjamin Herrenschmidt return -EINTR; 295a352894dSBenjamin Herrenschmidt if ((offset + len) > vma->vm_end) 296a352894dSBenjamin Herrenschmidt len = vma->vm_end - offset; 297a352894dSBenjamin Herrenschmidt local_store = ctx->ops->get_ls(ctx); 298a352894dSBenjamin Herrenschmidt if (write) 299a352894dSBenjamin Herrenschmidt memcpy_toio(local_store + offset, buf, len); 300a352894dSBenjamin Herrenschmidt else 301a352894dSBenjamin Herrenschmidt memcpy_fromio(buf, local_store + offset, len); 302a352894dSBenjamin Herrenschmidt spu_release(ctx); 303a352894dSBenjamin Herrenschmidt return len; 304a352894dSBenjamin Herrenschmidt } 30578bde53eSBenjamin Herrenschmidt 306f0f37e2fSAlexey Dobriyan static const struct vm_operations_struct spufs_mem_mmap_vmops = { 307b1e2270fSNick Piggin .fault = spufs_mem_mmap_fault, 308a352894dSBenjamin Herrenschmidt .access = spufs_mem_mmap_access, 3098b3d6663SArnd Bergmann }; 3108b3d6663SArnd Bergmann 311f1fa74f4SBenjamin Herrenschmidt static int spufs_mem_mmap(struct file *file, struct vm_area_struct *vma) 31267207b96SArnd Bergmann { 313f1fa74f4SBenjamin Herrenschmidt #ifdef CONFIG_SPU_FS_64K_LS 314f1fa74f4SBenjamin Herrenschmidt struct spu_context *ctx = file->private_data; 315f1fa74f4SBenjamin Herrenschmidt struct spu_state *csa = &ctx->csa; 316f1fa74f4SBenjamin Herrenschmidt 317f1fa74f4SBenjamin Herrenschmidt /* Sanity check VMA alignment */ 318f1fa74f4SBenjamin Herrenschmidt if (csa->use_big_pages) { 319f1fa74f4SBenjamin Herrenschmidt pr_debug("spufs_mem_mmap 64K, start=0x%lx, end=0x%lx," 320f1fa74f4SBenjamin Herrenschmidt " pgoff=0x%lx\n", vma->vm_start, vma->vm_end, 321f1fa74f4SBenjamin Herrenschmidt vma->vm_pgoff); 322f1fa74f4SBenjamin Herrenschmidt if (vma->vm_start & 0xffff) 323f1fa74f4SBenjamin Herrenschmidt return -EINVAL; 324f1fa74f4SBenjamin Herrenschmidt if (vma->vm_pgoff & 0xf) 325f1fa74f4SBenjamin Herrenschmidt return -EINVAL; 326f1fa74f4SBenjamin Herrenschmidt } 327f1fa74f4SBenjamin Herrenschmidt #endif /* CONFIG_SPU_FS_64K_LS */ 328f1fa74f4SBenjamin Herrenschmidt 3298b3d6663SArnd Bergmann if (!(vma->vm_flags & VM_SHARED)) 3308b3d6663SArnd Bergmann return -EINVAL; 33167207b96SArnd Bergmann 33278bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 33364b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached_wc(vma->vm_page_prot); 3348b3d6663SArnd Bergmann 3358b3d6663SArnd Bergmann vma->vm_ops = &spufs_mem_mmap_vmops; 33667207b96SArnd Bergmann return 0; 33767207b96SArnd Bergmann } 33867207b96SArnd Bergmann 339f1fa74f4SBenjamin Herrenschmidt #ifdef CONFIG_SPU_FS_64K_LS 3401238819aSSebastian Siewior static unsigned long spufs_get_unmapped_area(struct file *file, 3411238819aSSebastian Siewior unsigned long addr, unsigned long len, unsigned long pgoff, 342f1fa74f4SBenjamin Herrenschmidt unsigned long flags) 343f1fa74f4SBenjamin Herrenschmidt { 344f1fa74f4SBenjamin Herrenschmidt struct spu_context *ctx = file->private_data; 345f1fa74f4SBenjamin Herrenschmidt struct spu_state *csa = &ctx->csa; 346f1fa74f4SBenjamin Herrenschmidt 347f1fa74f4SBenjamin Herrenschmidt /* If not using big pages, fallback to normal MM g_u_a */ 348f1fa74f4SBenjamin Herrenschmidt if (!csa->use_big_pages) 349f1fa74f4SBenjamin Herrenschmidt return current->mm->get_unmapped_area(file, addr, len, 350f1fa74f4SBenjamin Herrenschmidt pgoff, flags); 351f1fa74f4SBenjamin Herrenschmidt 352f1fa74f4SBenjamin Herrenschmidt /* Else, try to obtain a 64K pages slice */ 353f1fa74f4SBenjamin Herrenschmidt return slice_get_unmapped_area(addr, len, flags, 35434d07177SMichel Lespinasse MMU_PAGE_64K, 1); 355f1fa74f4SBenjamin Herrenschmidt } 356f1fa74f4SBenjamin Herrenschmidt #endif /* CONFIG_SPU_FS_64K_LS */ 357f1fa74f4SBenjamin Herrenschmidt 3585dfe4c96SArjan van de Ven static const struct file_operations spufs_mem_fops = { 35967207b96SArnd Bergmann .open = spufs_mem_open, 360ce92987bSChristoph Hellwig .release = spufs_mem_release, 36167207b96SArnd Bergmann .read = spufs_mem_read, 36267207b96SArnd Bergmann .write = spufs_mem_write, 3638b3d6663SArnd Bergmann .llseek = generic_file_llseek, 36467207b96SArnd Bergmann .mmap = spufs_mem_mmap, 365f1fa74f4SBenjamin Herrenschmidt #ifdef CONFIG_SPU_FS_64K_LS 366f1fa74f4SBenjamin Herrenschmidt .get_unmapped_area = spufs_get_unmapped_area, 367f1fa74f4SBenjamin Herrenschmidt #endif 3688b3d6663SArnd Bergmann }; 3698b3d6663SArnd Bergmann 370b1e2270fSNick Piggin static int spufs_ps_fault(struct vm_area_struct *vma, 371b1e2270fSNick Piggin struct vm_fault *vmf, 37278bde53eSBenjamin Herrenschmidt unsigned long ps_offs, 37327d5bf2aSBenjamin Herrenschmidt unsigned long ps_size) 3746df10a82SMark Nutter { 3756df10a82SMark Nutter struct spu_context *ctx = vma->vm_file->private_data; 376b1e2270fSNick Piggin unsigned long area, offset = vmf->pgoff << PAGE_SHIFT; 377eebead5bSChristoph Hellwig int ret = 0; 3786df10a82SMark Nutter 379b1e2270fSNick Piggin spu_context_nospu_trace(spufs_ps_fault__enter, ctx); 380038200cfSChristoph Hellwig 38127d5bf2aSBenjamin Herrenschmidt if (offset >= ps_size) 382b1e2270fSNick Piggin return VM_FAULT_SIGBUS; 3836df10a82SMark Nutter 38460657263SJeremy Kerr if (fatal_signal_pending(current)) 38560657263SJeremy Kerr return VM_FAULT_SIGBUS; 38660657263SJeremy Kerr 38733bfd7a7SArnd Bergmann /* 388d5883137SJeremy Kerr * Because we release the mmap_sem, the context may be destroyed while 389d5883137SJeremy Kerr * we're in spu_wait. Grab an extra reference so it isn't destroyed 390d5883137SJeremy Kerr * in the meantime. 391d5883137SJeremy Kerr */ 392d5883137SJeremy Kerr get_spu_context(ctx); 393d5883137SJeremy Kerr 394d5883137SJeremy Kerr /* 39533bfd7a7SArnd Bergmann * We have to wait for context to be loaded before we have 39633bfd7a7SArnd Bergmann * pages to hand out to the user, but we don't want to wait 39733bfd7a7SArnd Bergmann * with the mmap_sem held. 39833bfd7a7SArnd Bergmann * It is possible to drop the mmap_sem here, but then we need 399b1e2270fSNick Piggin * to return VM_FAULT_NOPAGE because the mappings may have 40033bfd7a7SArnd Bergmann * hanged. 40178bde53eSBenjamin Herrenschmidt */ 402c9101bdbSChristoph Hellwig if (spu_acquire(ctx)) 403d5883137SJeremy Kerr goto refault; 404c9101bdbSChristoph Hellwig 40533bfd7a7SArnd Bergmann if (ctx->state == SPU_STATE_SAVED) { 40633bfd7a7SArnd Bergmann up_read(¤t->mm->mmap_sem); 407b1e2270fSNick Piggin spu_context_nospu_trace(spufs_ps_fault__sleep, ctx); 408eebead5bSChristoph Hellwig ret = spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE); 409b1e2270fSNick Piggin spu_context_trace(spufs_ps_fault__wake, ctx, ctx->spu); 41033bfd7a7SArnd Bergmann down_read(¤t->mm->mmap_sem); 411c9101bdbSChristoph Hellwig } else { 4126df10a82SMark Nutter area = ctx->spu->problem_phys + ps_offs; 413b1e2270fSNick Piggin vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, 414b1e2270fSNick Piggin (area + offset) >> PAGE_SHIFT); 415b1e2270fSNick Piggin spu_context_trace(spufs_ps_fault__insert, ctx, ctx->spu); 416c9101bdbSChristoph Hellwig } 41733bfd7a7SArnd Bergmann 418eebead5bSChristoph Hellwig if (!ret) 4196df10a82SMark Nutter spu_release(ctx); 420d5883137SJeremy Kerr 421d5883137SJeremy Kerr refault: 422d5883137SJeremy Kerr put_spu_context(ctx); 423b1e2270fSNick Piggin return VM_FAULT_NOPAGE; 4246df10a82SMark Nutter } 4256df10a82SMark Nutter 42627d5bf2aSBenjamin Herrenschmidt #if SPUFS_MMAP_4K 427b1e2270fSNick Piggin static int spufs_cntl_mmap_fault(struct vm_area_struct *vma, 428b1e2270fSNick Piggin struct vm_fault *vmf) 4296df10a82SMark Nutter { 43087ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x4000, SPUFS_CNTL_MAP_SIZE); 4316df10a82SMark Nutter } 4326df10a82SMark Nutter 433f0f37e2fSAlexey Dobriyan static const struct vm_operations_struct spufs_cntl_mmap_vmops = { 434b1e2270fSNick Piggin .fault = spufs_cntl_mmap_fault, 4356df10a82SMark Nutter }; 4366df10a82SMark Nutter 4376df10a82SMark Nutter /* 4386df10a82SMark Nutter * mmap support for problem state control area [0x4000 - 0x4fff]. 4396df10a82SMark Nutter */ 4406df10a82SMark Nutter static int spufs_cntl_mmap(struct file *file, struct vm_area_struct *vma) 4416df10a82SMark Nutter { 4426df10a82SMark Nutter if (!(vma->vm_flags & VM_SHARED)) 4436df10a82SMark Nutter return -EINVAL; 4446df10a82SMark Nutter 44578bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 44664b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 4476df10a82SMark Nutter 4486df10a82SMark Nutter vma->vm_ops = &spufs_cntl_mmap_vmops; 4496df10a82SMark Nutter return 0; 4506df10a82SMark Nutter } 45127d5bf2aSBenjamin Herrenschmidt #else /* SPUFS_MMAP_4K */ 45227d5bf2aSBenjamin Herrenschmidt #define spufs_cntl_mmap NULL 45327d5bf2aSBenjamin Herrenschmidt #endif /* !SPUFS_MMAP_4K */ 4546df10a82SMark Nutter 455197b1a82SChristoph Hellwig static int spufs_cntl_get(void *data, u64 *val) 456e1dbff2bSArnd Bergmann { 457e1dbff2bSArnd Bergmann struct spu_context *ctx = data; 458c9101bdbSChristoph Hellwig int ret; 459e1dbff2bSArnd Bergmann 460c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 461c9101bdbSChristoph Hellwig if (ret) 462c9101bdbSChristoph Hellwig return ret; 463197b1a82SChristoph Hellwig *val = ctx->ops->status_read(ctx); 464e1dbff2bSArnd Bergmann spu_release(ctx); 465e1dbff2bSArnd Bergmann 466197b1a82SChristoph Hellwig return 0; 467e1dbff2bSArnd Bergmann } 468e1dbff2bSArnd Bergmann 469197b1a82SChristoph Hellwig static int spufs_cntl_set(void *data, u64 val) 470e1dbff2bSArnd Bergmann { 471e1dbff2bSArnd Bergmann struct spu_context *ctx = data; 472c9101bdbSChristoph Hellwig int ret; 473e1dbff2bSArnd Bergmann 474c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 475c9101bdbSChristoph Hellwig if (ret) 476c9101bdbSChristoph Hellwig return ret; 477e1dbff2bSArnd Bergmann ctx->ops->runcntl_write(ctx, val); 478e1dbff2bSArnd Bergmann spu_release(ctx); 479197b1a82SChristoph Hellwig 480197b1a82SChristoph Hellwig return 0; 481e1dbff2bSArnd Bergmann } 482e1dbff2bSArnd Bergmann 4836df10a82SMark Nutter static int spufs_cntl_open(struct inode *inode, struct file *file) 4846df10a82SMark Nutter { 4856df10a82SMark Nutter struct spufs_inode_info *i = SPUFS_I(inode); 4866df10a82SMark Nutter struct spu_context *ctx = i->i_ctx; 4876df10a82SMark Nutter 48847d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 4896df10a82SMark Nutter file->private_data = ctx; 49043c2bbd9SChristoph Hellwig if (!i->i_openers++) 4916df10a82SMark Nutter ctx->cntl = inode->i_mapping; 49247d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 4938b88b099SChristoph Hellwig return simple_attr_open(inode, file, spufs_cntl_get, 494e1dbff2bSArnd Bergmann spufs_cntl_set, "0x%08lx"); 4956df10a82SMark Nutter } 4966df10a82SMark Nutter 49743c2bbd9SChristoph Hellwig static int 49843c2bbd9SChristoph Hellwig spufs_cntl_release(struct inode *inode, struct file *file) 49943c2bbd9SChristoph Hellwig { 50043c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 50143c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 50243c2bbd9SChristoph Hellwig 50374bedc4dSChristoph Hellwig simple_attr_release(inode, file); 50443c2bbd9SChristoph Hellwig 50547d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 50643c2bbd9SChristoph Hellwig if (!--i->i_openers) 50743c2bbd9SChristoph Hellwig ctx->cntl = NULL; 50847d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 50943c2bbd9SChristoph Hellwig return 0; 51043c2bbd9SChristoph Hellwig } 51143c2bbd9SChristoph Hellwig 5125dfe4c96SArjan van de Ven static const struct file_operations spufs_cntl_fops = { 5136df10a82SMark Nutter .open = spufs_cntl_open, 51443c2bbd9SChristoph Hellwig .release = spufs_cntl_release, 5158b88b099SChristoph Hellwig .read = simple_attr_read, 5168b88b099SChristoph Hellwig .write = simple_attr_write, 517fc15351dSArnd Bergmann .llseek = generic_file_llseek, 5186df10a82SMark Nutter .mmap = spufs_cntl_mmap, 5196df10a82SMark Nutter }; 5206df10a82SMark Nutter 5218b3d6663SArnd Bergmann static int 5228b3d6663SArnd Bergmann spufs_regs_open(struct inode *inode, struct file *file) 5238b3d6663SArnd Bergmann { 5248b3d6663SArnd Bergmann struct spufs_inode_info *i = SPUFS_I(inode); 5258b3d6663SArnd Bergmann file->private_data = i->i_ctx; 5268b3d6663SArnd Bergmann return 0; 5278b3d6663SArnd Bergmann } 5288b3d6663SArnd Bergmann 5298b3d6663SArnd Bergmann static ssize_t 530bf1ab978SDwayne Grant McConnell __spufs_regs_read(struct spu_context *ctx, char __user *buffer, 531bf1ab978SDwayne Grant McConnell size_t size, loff_t *pos) 532bf1ab978SDwayne Grant McConnell { 533bf1ab978SDwayne Grant McConnell struct spu_lscsa *lscsa = ctx->csa.lscsa; 534bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buffer, size, pos, 535bf1ab978SDwayne Grant McConnell lscsa->gprs, sizeof lscsa->gprs); 536bf1ab978SDwayne Grant McConnell } 537bf1ab978SDwayne Grant McConnell 538bf1ab978SDwayne Grant McConnell static ssize_t 5398b3d6663SArnd Bergmann spufs_regs_read(struct file *file, char __user *buffer, 5408b3d6663SArnd Bergmann size_t size, loff_t *pos) 5418b3d6663SArnd Bergmann { 5428b3d6663SArnd Bergmann int ret; 543bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 5448b3d6663SArnd Bergmann 545f027faa2SJeremy Kerr /* pre-check for file position: if we'd return EOF, there's no point 546f027faa2SJeremy Kerr * causing a deschedule */ 547f027faa2SJeremy Kerr if (*pos >= sizeof(ctx->csa.lscsa->gprs)) 548f027faa2SJeremy Kerr return 0; 549f027faa2SJeremy Kerr 550c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 551c9101bdbSChristoph Hellwig if (ret) 552c9101bdbSChristoph Hellwig return ret; 553bf1ab978SDwayne Grant McConnell ret = __spufs_regs_read(ctx, buffer, size, pos); 55427b1ea09SChristoph Hellwig spu_release_saved(ctx); 5558b3d6663SArnd Bergmann return ret; 5568b3d6663SArnd Bergmann } 5578b3d6663SArnd Bergmann 5588b3d6663SArnd Bergmann static ssize_t 5598b3d6663SArnd Bergmann spufs_regs_write(struct file *file, const char __user *buffer, 5608b3d6663SArnd Bergmann size_t size, loff_t *pos) 5618b3d6663SArnd Bergmann { 5628b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 5638b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 5648b3d6663SArnd Bergmann int ret; 5658b3d6663SArnd Bergmann 566d219889bSJeremy Kerr if (*pos >= sizeof(lscsa->gprs)) 5678b3d6663SArnd Bergmann return -EFBIG; 568d219889bSJeremy Kerr 569c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 570c9101bdbSChristoph Hellwig if (ret) 571c9101bdbSChristoph Hellwig return ret; 5728b3d6663SArnd Bergmann 57363c3b9d7SAkinobu Mita size = simple_write_to_buffer(lscsa->gprs, sizeof(lscsa->gprs), pos, 57463c3b9d7SAkinobu Mita buffer, size); 5758b3d6663SArnd Bergmann 57627b1ea09SChristoph Hellwig spu_release_saved(ctx); 57763c3b9d7SAkinobu Mita return size; 5788b3d6663SArnd Bergmann } 5798b3d6663SArnd Bergmann 5805dfe4c96SArjan van de Ven static const struct file_operations spufs_regs_fops = { 5818b3d6663SArnd Bergmann .open = spufs_regs_open, 5828b3d6663SArnd Bergmann .read = spufs_regs_read, 5838b3d6663SArnd Bergmann .write = spufs_regs_write, 5848b3d6663SArnd Bergmann .llseek = generic_file_llseek, 5858b3d6663SArnd Bergmann }; 5868b3d6663SArnd Bergmann 5878b3d6663SArnd Bergmann static ssize_t 588bf1ab978SDwayne Grant McConnell __spufs_fpcr_read(struct spu_context *ctx, char __user * buffer, 589bf1ab978SDwayne Grant McConnell size_t size, loff_t * pos) 590bf1ab978SDwayne Grant McConnell { 591bf1ab978SDwayne Grant McConnell struct spu_lscsa *lscsa = ctx->csa.lscsa; 592bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buffer, size, pos, 593bf1ab978SDwayne Grant McConnell &lscsa->fpcr, sizeof(lscsa->fpcr)); 594bf1ab978SDwayne Grant McConnell } 595bf1ab978SDwayne Grant McConnell 596bf1ab978SDwayne Grant McConnell static ssize_t 5978b3d6663SArnd Bergmann spufs_fpcr_read(struct file *file, char __user * buffer, 5988b3d6663SArnd Bergmann size_t size, loff_t * pos) 5998b3d6663SArnd Bergmann { 6008b3d6663SArnd Bergmann int ret; 601bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 6028b3d6663SArnd Bergmann 603c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 604c9101bdbSChristoph Hellwig if (ret) 605c9101bdbSChristoph Hellwig return ret; 606bf1ab978SDwayne Grant McConnell ret = __spufs_fpcr_read(ctx, buffer, size, pos); 60727b1ea09SChristoph Hellwig spu_release_saved(ctx); 6088b3d6663SArnd Bergmann return ret; 6098b3d6663SArnd Bergmann } 6108b3d6663SArnd Bergmann 6118b3d6663SArnd Bergmann static ssize_t 6128b3d6663SArnd Bergmann spufs_fpcr_write(struct file *file, const char __user * buffer, 6138b3d6663SArnd Bergmann size_t size, loff_t * pos) 6148b3d6663SArnd Bergmann { 6158b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 6168b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 6178b3d6663SArnd Bergmann int ret; 6188b3d6663SArnd Bergmann 619d219889bSJeremy Kerr if (*pos >= sizeof(lscsa->fpcr)) 6208b3d6663SArnd Bergmann return -EFBIG; 621c9101bdbSChristoph Hellwig 622c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 623c9101bdbSChristoph Hellwig if (ret) 624c9101bdbSChristoph Hellwig return ret; 625c9101bdbSChristoph Hellwig 62663c3b9d7SAkinobu Mita size = simple_write_to_buffer(&lscsa->fpcr, sizeof(lscsa->fpcr), pos, 62763c3b9d7SAkinobu Mita buffer, size); 6288b3d6663SArnd Bergmann 62927b1ea09SChristoph Hellwig spu_release_saved(ctx); 63063c3b9d7SAkinobu Mita return size; 6318b3d6663SArnd Bergmann } 6328b3d6663SArnd Bergmann 6335dfe4c96SArjan van de Ven static const struct file_operations spufs_fpcr_fops = { 6348b3d6663SArnd Bergmann .open = spufs_regs_open, 6358b3d6663SArnd Bergmann .read = spufs_fpcr_read, 6368b3d6663SArnd Bergmann .write = spufs_fpcr_write, 63767207b96SArnd Bergmann .llseek = generic_file_llseek, 63867207b96SArnd Bergmann }; 63967207b96SArnd Bergmann 64067207b96SArnd Bergmann /* generic open function for all pipe-like files */ 64167207b96SArnd Bergmann static int spufs_pipe_open(struct inode *inode, struct file *file) 64267207b96SArnd Bergmann { 64367207b96SArnd Bergmann struct spufs_inode_info *i = SPUFS_I(inode); 64467207b96SArnd Bergmann file->private_data = i->i_ctx; 64567207b96SArnd Bergmann 64667207b96SArnd Bergmann return nonseekable_open(inode, file); 64767207b96SArnd Bergmann } 64867207b96SArnd Bergmann 649cdcc89bbSArnd Bergmann /* 650cdcc89bbSArnd Bergmann * Read as many bytes from the mailbox as possible, until 651cdcc89bbSArnd Bergmann * one of the conditions becomes true: 652cdcc89bbSArnd Bergmann * 653cdcc89bbSArnd Bergmann * - no more data available in the mailbox 654cdcc89bbSArnd Bergmann * - end of the user provided buffer 655cdcc89bbSArnd Bergmann * - end of the mapped area 656cdcc89bbSArnd Bergmann */ 65767207b96SArnd Bergmann static ssize_t spufs_mbox_read(struct file *file, char __user *buf, 65867207b96SArnd Bergmann size_t len, loff_t *pos) 65967207b96SArnd Bergmann { 6608b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 661cdcc89bbSArnd Bergmann u32 mbox_data, __user *udata; 662cdcc89bbSArnd Bergmann ssize_t count; 66367207b96SArnd Bergmann 66467207b96SArnd Bergmann if (len < 4) 66567207b96SArnd Bergmann return -EINVAL; 66667207b96SArnd Bergmann 667cdcc89bbSArnd Bergmann if (!access_ok(VERIFY_WRITE, buf, len)) 66867207b96SArnd Bergmann return -EFAULT; 66967207b96SArnd Bergmann 670cdcc89bbSArnd Bergmann udata = (void __user *)buf; 671cdcc89bbSArnd Bergmann 672c9101bdbSChristoph Hellwig count = spu_acquire(ctx); 673c9101bdbSChristoph Hellwig if (count) 674c9101bdbSChristoph Hellwig return count; 675c9101bdbSChristoph Hellwig 676274cef5eSArnd Bergmann for (count = 0; (count + 4) <= len; count += 4, udata++) { 677cdcc89bbSArnd Bergmann int ret; 678cdcc89bbSArnd Bergmann ret = ctx->ops->mbox_read(ctx, &mbox_data); 679cdcc89bbSArnd Bergmann if (ret == 0) 680cdcc89bbSArnd Bergmann break; 681cdcc89bbSArnd Bergmann 682cdcc89bbSArnd Bergmann /* 683cdcc89bbSArnd Bergmann * at the end of the mapped area, we can fault 684cdcc89bbSArnd Bergmann * but still need to return the data we have 685cdcc89bbSArnd Bergmann * read successfully so far. 686cdcc89bbSArnd Bergmann */ 687cdcc89bbSArnd Bergmann ret = __put_user(mbox_data, udata); 688cdcc89bbSArnd Bergmann if (ret) { 689cdcc89bbSArnd Bergmann if (!count) 690cdcc89bbSArnd Bergmann count = -EFAULT; 691cdcc89bbSArnd Bergmann break; 692cdcc89bbSArnd Bergmann } 693cdcc89bbSArnd Bergmann } 694cdcc89bbSArnd Bergmann spu_release(ctx); 695cdcc89bbSArnd Bergmann 696cdcc89bbSArnd Bergmann if (!count) 697cdcc89bbSArnd Bergmann count = -EAGAIN; 698cdcc89bbSArnd Bergmann 699cdcc89bbSArnd Bergmann return count; 70067207b96SArnd Bergmann } 70167207b96SArnd Bergmann 7025dfe4c96SArjan van de Ven static const struct file_operations spufs_mbox_fops = { 70367207b96SArnd Bergmann .open = spufs_pipe_open, 70467207b96SArnd Bergmann .read = spufs_mbox_read, 705fc15351dSArnd Bergmann .llseek = no_llseek, 70667207b96SArnd Bergmann }; 70767207b96SArnd Bergmann 70867207b96SArnd Bergmann static ssize_t spufs_mbox_stat_read(struct file *file, char __user *buf, 70967207b96SArnd Bergmann size_t len, loff_t *pos) 71067207b96SArnd Bergmann { 7118b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 712c9101bdbSChristoph Hellwig ssize_t ret; 71367207b96SArnd Bergmann u32 mbox_stat; 71467207b96SArnd Bergmann 71567207b96SArnd Bergmann if (len < 4) 71667207b96SArnd Bergmann return -EINVAL; 71767207b96SArnd Bergmann 718c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 719c9101bdbSChristoph Hellwig if (ret) 720c9101bdbSChristoph Hellwig return ret; 7218b3d6663SArnd Bergmann 7228b3d6663SArnd Bergmann mbox_stat = ctx->ops->mbox_stat_read(ctx) & 0xff; 7238b3d6663SArnd Bergmann 7248b3d6663SArnd Bergmann spu_release(ctx); 72567207b96SArnd Bergmann 72667207b96SArnd Bergmann if (copy_to_user(buf, &mbox_stat, sizeof mbox_stat)) 72767207b96SArnd Bergmann return -EFAULT; 72867207b96SArnd Bergmann 72967207b96SArnd Bergmann return 4; 73067207b96SArnd Bergmann } 73167207b96SArnd Bergmann 7325dfe4c96SArjan van de Ven static const struct file_operations spufs_mbox_stat_fops = { 73367207b96SArnd Bergmann .open = spufs_pipe_open, 73467207b96SArnd Bergmann .read = spufs_mbox_stat_read, 735fc15351dSArnd Bergmann .llseek = no_llseek, 73667207b96SArnd Bergmann }; 73767207b96SArnd Bergmann 73867207b96SArnd Bergmann /* low-level ibox access function */ 7398b3d6663SArnd Bergmann size_t spu_ibox_read(struct spu_context *ctx, u32 *data) 74067207b96SArnd Bergmann { 7418b3d6663SArnd Bergmann return ctx->ops->ibox_read(ctx, data); 74267207b96SArnd Bergmann } 74367207b96SArnd Bergmann 74467207b96SArnd Bergmann static int spufs_ibox_fasync(int fd, struct file *file, int on) 74567207b96SArnd Bergmann { 7468b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 7478b3d6663SArnd Bergmann 7488b3d6663SArnd Bergmann return fasync_helper(fd, file, on, &ctx->ibox_fasync); 7498b3d6663SArnd Bergmann } 7508b3d6663SArnd Bergmann 7518b3d6663SArnd Bergmann /* interrupt-level ibox callback function. */ 7528b3d6663SArnd Bergmann void spufs_ibox_callback(struct spu *spu) 7538b3d6663SArnd Bergmann { 7548b3d6663SArnd Bergmann struct spu_context *ctx = spu->ctx; 7558b3d6663SArnd Bergmann 756e65c2f6fSLuke Browning if (!ctx) 757e65c2f6fSLuke Browning return; 758e65c2f6fSLuke Browning 7598b3d6663SArnd Bergmann wake_up_all(&ctx->ibox_wq); 7608b3d6663SArnd Bergmann kill_fasync(&ctx->ibox_fasync, SIGIO, POLLIN); 76167207b96SArnd Bergmann } 76267207b96SArnd Bergmann 763cdcc89bbSArnd Bergmann /* 764cdcc89bbSArnd Bergmann * Read as many bytes from the interrupt mailbox as possible, until 765cdcc89bbSArnd Bergmann * one of the conditions becomes true: 766cdcc89bbSArnd Bergmann * 767cdcc89bbSArnd Bergmann * - no more data available in the mailbox 768cdcc89bbSArnd Bergmann * - end of the user provided buffer 769cdcc89bbSArnd Bergmann * - end of the mapped area 770cdcc89bbSArnd Bergmann * 771cdcc89bbSArnd Bergmann * If the file is opened without O_NONBLOCK, we wait here until 772cdcc89bbSArnd Bergmann * any data is available, but return when we have been able to 773cdcc89bbSArnd Bergmann * read something. 774cdcc89bbSArnd Bergmann */ 77567207b96SArnd Bergmann static ssize_t spufs_ibox_read(struct file *file, char __user *buf, 77667207b96SArnd Bergmann size_t len, loff_t *pos) 77767207b96SArnd Bergmann { 7788b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 779cdcc89bbSArnd Bergmann u32 ibox_data, __user *udata; 780cdcc89bbSArnd Bergmann ssize_t count; 78167207b96SArnd Bergmann 78267207b96SArnd Bergmann if (len < 4) 78367207b96SArnd Bergmann return -EINVAL; 78467207b96SArnd Bergmann 785cdcc89bbSArnd Bergmann if (!access_ok(VERIFY_WRITE, buf, len)) 786cdcc89bbSArnd Bergmann return -EFAULT; 787cdcc89bbSArnd Bergmann 788cdcc89bbSArnd Bergmann udata = (void __user *)buf; 789cdcc89bbSArnd Bergmann 790c9101bdbSChristoph Hellwig count = spu_acquire(ctx); 791c9101bdbSChristoph Hellwig if (count) 792eebead5bSChristoph Hellwig goto out; 79367207b96SArnd Bergmann 794cdcc89bbSArnd Bergmann /* wait only for the first element */ 795cdcc89bbSArnd Bergmann count = 0; 79667207b96SArnd Bergmann if (file->f_flags & O_NONBLOCK) { 797eebead5bSChristoph Hellwig if (!spu_ibox_read(ctx, &ibox_data)) { 798cdcc89bbSArnd Bergmann count = -EAGAIN; 799eebead5bSChristoph Hellwig goto out_unlock; 800eebead5bSChristoph Hellwig } 80167207b96SArnd Bergmann } else { 802cdcc89bbSArnd Bergmann count = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data)); 803cdcc89bbSArnd Bergmann if (count) 804cdcc89bbSArnd Bergmann goto out; 805eebead5bSChristoph Hellwig } 806cdcc89bbSArnd Bergmann 807cdcc89bbSArnd Bergmann /* if we can't write at all, return -EFAULT */ 808cdcc89bbSArnd Bergmann count = __put_user(ibox_data, udata); 809cdcc89bbSArnd Bergmann if (count) 810eebead5bSChristoph Hellwig goto out_unlock; 811cdcc89bbSArnd Bergmann 812cdcc89bbSArnd Bergmann for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) { 813cdcc89bbSArnd Bergmann int ret; 814cdcc89bbSArnd Bergmann ret = ctx->ops->ibox_read(ctx, &ibox_data); 815cdcc89bbSArnd Bergmann if (ret == 0) 816cdcc89bbSArnd Bergmann break; 817cdcc89bbSArnd Bergmann /* 818cdcc89bbSArnd Bergmann * at the end of the mapped area, we can fault 819cdcc89bbSArnd Bergmann * but still need to return the data we have 820cdcc89bbSArnd Bergmann * read successfully so far. 821cdcc89bbSArnd Bergmann */ 822cdcc89bbSArnd Bergmann ret = __put_user(ibox_data, udata); 823cdcc89bbSArnd Bergmann if (ret) 824cdcc89bbSArnd Bergmann break; 82567207b96SArnd Bergmann } 82667207b96SArnd Bergmann 827eebead5bSChristoph Hellwig out_unlock: 8288b3d6663SArnd Bergmann spu_release(ctx); 829eebead5bSChristoph Hellwig out: 830cdcc89bbSArnd Bergmann return count; 83167207b96SArnd Bergmann } 83267207b96SArnd Bergmann 83367207b96SArnd Bergmann static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait) 83467207b96SArnd Bergmann { 8358b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 83667207b96SArnd Bergmann unsigned int mask; 83767207b96SArnd Bergmann 8388b3d6663SArnd Bergmann poll_wait(file, &ctx->ibox_wq, wait); 83967207b96SArnd Bergmann 840c9101bdbSChristoph Hellwig /* 841c9101bdbSChristoph Hellwig * For now keep this uninterruptible and also ignore the rule 842c9101bdbSChristoph Hellwig * that poll should not sleep. Will be fixed later. 843c9101bdbSChristoph Hellwig */ 844c9101bdbSChristoph Hellwig mutex_lock(&ctx->state_mutex); 8453a843d7cSArnd Bergmann mask = ctx->ops->mbox_stat_poll(ctx, POLLIN | POLLRDNORM); 8463a843d7cSArnd Bergmann spu_release(ctx); 84767207b96SArnd Bergmann 84867207b96SArnd Bergmann return mask; 84967207b96SArnd Bergmann } 85067207b96SArnd Bergmann 8515dfe4c96SArjan van de Ven static const struct file_operations spufs_ibox_fops = { 85267207b96SArnd Bergmann .open = spufs_pipe_open, 85367207b96SArnd Bergmann .read = spufs_ibox_read, 85467207b96SArnd Bergmann .poll = spufs_ibox_poll, 85567207b96SArnd Bergmann .fasync = spufs_ibox_fasync, 856fc15351dSArnd Bergmann .llseek = no_llseek, 85767207b96SArnd Bergmann }; 85867207b96SArnd Bergmann 85967207b96SArnd Bergmann static ssize_t spufs_ibox_stat_read(struct file *file, char __user *buf, 86067207b96SArnd Bergmann size_t len, loff_t *pos) 86167207b96SArnd Bergmann { 8628b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 863c9101bdbSChristoph Hellwig ssize_t ret; 86467207b96SArnd Bergmann u32 ibox_stat; 86567207b96SArnd Bergmann 86667207b96SArnd Bergmann if (len < 4) 86767207b96SArnd Bergmann return -EINVAL; 86867207b96SArnd Bergmann 869c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 870c9101bdbSChristoph Hellwig if (ret) 871c9101bdbSChristoph Hellwig return ret; 8728b3d6663SArnd Bergmann ibox_stat = (ctx->ops->mbox_stat_read(ctx) >> 16) & 0xff; 8738b3d6663SArnd Bergmann spu_release(ctx); 87467207b96SArnd Bergmann 87567207b96SArnd Bergmann if (copy_to_user(buf, &ibox_stat, sizeof ibox_stat)) 87667207b96SArnd Bergmann return -EFAULT; 87767207b96SArnd Bergmann 87867207b96SArnd Bergmann return 4; 87967207b96SArnd Bergmann } 88067207b96SArnd Bergmann 8815dfe4c96SArjan van de Ven static const struct file_operations spufs_ibox_stat_fops = { 88267207b96SArnd Bergmann .open = spufs_pipe_open, 88367207b96SArnd Bergmann .read = spufs_ibox_stat_read, 884fc15351dSArnd Bergmann .llseek = no_llseek, 88567207b96SArnd Bergmann }; 88667207b96SArnd Bergmann 88767207b96SArnd Bergmann /* low-level mailbox write */ 8888b3d6663SArnd Bergmann size_t spu_wbox_write(struct spu_context *ctx, u32 data) 88967207b96SArnd Bergmann { 8908b3d6663SArnd Bergmann return ctx->ops->wbox_write(ctx, data); 89167207b96SArnd Bergmann } 89267207b96SArnd Bergmann 89367207b96SArnd Bergmann static int spufs_wbox_fasync(int fd, struct file *file, int on) 89467207b96SArnd Bergmann { 8958b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 8968b3d6663SArnd Bergmann int ret; 8978b3d6663SArnd Bergmann 8988b3d6663SArnd Bergmann ret = fasync_helper(fd, file, on, &ctx->wbox_fasync); 8998b3d6663SArnd Bergmann 9008b3d6663SArnd Bergmann return ret; 9018b3d6663SArnd Bergmann } 9028b3d6663SArnd Bergmann 9038b3d6663SArnd Bergmann /* interrupt-level wbox callback function. */ 9048b3d6663SArnd Bergmann void spufs_wbox_callback(struct spu *spu) 9058b3d6663SArnd Bergmann { 9068b3d6663SArnd Bergmann struct spu_context *ctx = spu->ctx; 9078b3d6663SArnd Bergmann 908e65c2f6fSLuke Browning if (!ctx) 909e65c2f6fSLuke Browning return; 910e65c2f6fSLuke Browning 9118b3d6663SArnd Bergmann wake_up_all(&ctx->wbox_wq); 9128b3d6663SArnd Bergmann kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT); 91367207b96SArnd Bergmann } 91467207b96SArnd Bergmann 915cdcc89bbSArnd Bergmann /* 916cdcc89bbSArnd Bergmann * Write as many bytes to the interrupt mailbox as possible, until 917cdcc89bbSArnd Bergmann * one of the conditions becomes true: 918cdcc89bbSArnd Bergmann * 919cdcc89bbSArnd Bergmann * - the mailbox is full 920cdcc89bbSArnd Bergmann * - end of the user provided buffer 921cdcc89bbSArnd Bergmann * - end of the mapped area 922cdcc89bbSArnd Bergmann * 923cdcc89bbSArnd Bergmann * If the file is opened without O_NONBLOCK, we wait here until 924cdcc89bbSArnd Bergmann * space is availabyl, but return when we have been able to 925cdcc89bbSArnd Bergmann * write something. 926cdcc89bbSArnd Bergmann */ 92767207b96SArnd Bergmann static ssize_t spufs_wbox_write(struct file *file, const char __user *buf, 92867207b96SArnd Bergmann size_t len, loff_t *pos) 92967207b96SArnd Bergmann { 9308b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 931cdcc89bbSArnd Bergmann u32 wbox_data, __user *udata; 932cdcc89bbSArnd Bergmann ssize_t count; 93367207b96SArnd Bergmann 93467207b96SArnd Bergmann if (len < 4) 93567207b96SArnd Bergmann return -EINVAL; 93667207b96SArnd Bergmann 937cdcc89bbSArnd Bergmann udata = (void __user *)buf; 938cdcc89bbSArnd Bergmann if (!access_ok(VERIFY_READ, buf, len)) 939cdcc89bbSArnd Bergmann return -EFAULT; 940cdcc89bbSArnd Bergmann 941cdcc89bbSArnd Bergmann if (__get_user(wbox_data, udata)) 94267207b96SArnd Bergmann return -EFAULT; 94367207b96SArnd Bergmann 944c9101bdbSChristoph Hellwig count = spu_acquire(ctx); 945c9101bdbSChristoph Hellwig if (count) 946eebead5bSChristoph Hellwig goto out; 9478b3d6663SArnd Bergmann 948cdcc89bbSArnd Bergmann /* 949cdcc89bbSArnd Bergmann * make sure we can at least write one element, by waiting 950cdcc89bbSArnd Bergmann * in case of !O_NONBLOCK 951cdcc89bbSArnd Bergmann */ 952cdcc89bbSArnd Bergmann count = 0; 95367207b96SArnd Bergmann if (file->f_flags & O_NONBLOCK) { 954eebead5bSChristoph Hellwig if (!spu_wbox_write(ctx, wbox_data)) { 955cdcc89bbSArnd Bergmann count = -EAGAIN; 956eebead5bSChristoph Hellwig goto out_unlock; 957eebead5bSChristoph Hellwig } 95867207b96SArnd Bergmann } else { 959cdcc89bbSArnd Bergmann count = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data)); 960cdcc89bbSArnd Bergmann if (count) 961cdcc89bbSArnd Bergmann goto out; 962eebead5bSChristoph Hellwig } 963eebead5bSChristoph Hellwig 9648b3d6663SArnd Bergmann 96596de0e25SJan Engelhardt /* write as much as possible */ 966cdcc89bbSArnd Bergmann for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) { 967cdcc89bbSArnd Bergmann int ret; 968cdcc89bbSArnd Bergmann ret = __get_user(wbox_data, udata); 969cdcc89bbSArnd Bergmann if (ret) 970cdcc89bbSArnd Bergmann break; 971cdcc89bbSArnd Bergmann 972cdcc89bbSArnd Bergmann ret = spu_wbox_write(ctx, wbox_data); 973cdcc89bbSArnd Bergmann if (ret == 0) 974cdcc89bbSArnd Bergmann break; 975cdcc89bbSArnd Bergmann } 976cdcc89bbSArnd Bergmann 977eebead5bSChristoph Hellwig out_unlock: 978cdcc89bbSArnd Bergmann spu_release(ctx); 979eebead5bSChristoph Hellwig out: 980cdcc89bbSArnd Bergmann return count; 98167207b96SArnd Bergmann } 98267207b96SArnd Bergmann 98367207b96SArnd Bergmann static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait) 98467207b96SArnd Bergmann { 9858b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 98667207b96SArnd Bergmann unsigned int mask; 98767207b96SArnd Bergmann 9888b3d6663SArnd Bergmann poll_wait(file, &ctx->wbox_wq, wait); 98967207b96SArnd Bergmann 990c9101bdbSChristoph Hellwig /* 991c9101bdbSChristoph Hellwig * For now keep this uninterruptible and also ignore the rule 992c9101bdbSChristoph Hellwig * that poll should not sleep. Will be fixed later. 993c9101bdbSChristoph Hellwig */ 994c9101bdbSChristoph Hellwig mutex_lock(&ctx->state_mutex); 9953a843d7cSArnd Bergmann mask = ctx->ops->mbox_stat_poll(ctx, POLLOUT | POLLWRNORM); 9963a843d7cSArnd Bergmann spu_release(ctx); 99767207b96SArnd Bergmann 99867207b96SArnd Bergmann return mask; 99967207b96SArnd Bergmann } 100067207b96SArnd Bergmann 10015dfe4c96SArjan van de Ven static const struct file_operations spufs_wbox_fops = { 100267207b96SArnd Bergmann .open = spufs_pipe_open, 100367207b96SArnd Bergmann .write = spufs_wbox_write, 100467207b96SArnd Bergmann .poll = spufs_wbox_poll, 100567207b96SArnd Bergmann .fasync = spufs_wbox_fasync, 1006fc15351dSArnd Bergmann .llseek = no_llseek, 100767207b96SArnd Bergmann }; 100867207b96SArnd Bergmann 100967207b96SArnd Bergmann static ssize_t spufs_wbox_stat_read(struct file *file, char __user *buf, 101067207b96SArnd Bergmann size_t len, loff_t *pos) 101167207b96SArnd Bergmann { 10128b3d6663SArnd Bergmann struct spu_context *ctx = file->private_data; 1013c9101bdbSChristoph Hellwig ssize_t ret; 101467207b96SArnd Bergmann u32 wbox_stat; 101567207b96SArnd Bergmann 101667207b96SArnd Bergmann if (len < 4) 101767207b96SArnd Bergmann return -EINVAL; 101867207b96SArnd Bergmann 1019c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1020c9101bdbSChristoph Hellwig if (ret) 1021c9101bdbSChristoph Hellwig return ret; 10228b3d6663SArnd Bergmann wbox_stat = (ctx->ops->mbox_stat_read(ctx) >> 8) & 0xff; 10238b3d6663SArnd Bergmann spu_release(ctx); 102467207b96SArnd Bergmann 102567207b96SArnd Bergmann if (copy_to_user(buf, &wbox_stat, sizeof wbox_stat)) 102667207b96SArnd Bergmann return -EFAULT; 102767207b96SArnd Bergmann 102867207b96SArnd Bergmann return 4; 102967207b96SArnd Bergmann } 103067207b96SArnd Bergmann 10315dfe4c96SArjan van de Ven static const struct file_operations spufs_wbox_stat_fops = { 103267207b96SArnd Bergmann .open = spufs_pipe_open, 103367207b96SArnd Bergmann .read = spufs_wbox_stat_read, 1034fc15351dSArnd Bergmann .llseek = no_llseek, 103567207b96SArnd Bergmann }; 103667207b96SArnd Bergmann 10376df10a82SMark Nutter static int spufs_signal1_open(struct inode *inode, struct file *file) 10386df10a82SMark Nutter { 10396df10a82SMark Nutter struct spufs_inode_info *i = SPUFS_I(inode); 10406df10a82SMark Nutter struct spu_context *ctx = i->i_ctx; 104143c2bbd9SChristoph Hellwig 104247d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 10436df10a82SMark Nutter file->private_data = ctx; 104443c2bbd9SChristoph Hellwig if (!i->i_openers++) 10456df10a82SMark Nutter ctx->signal1 = inode->i_mapping; 104647d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 10476df10a82SMark Nutter return nonseekable_open(inode, file); 10486df10a82SMark Nutter } 10496df10a82SMark Nutter 105043c2bbd9SChristoph Hellwig static int 105143c2bbd9SChristoph Hellwig spufs_signal1_release(struct inode *inode, struct file *file) 105243c2bbd9SChristoph Hellwig { 105343c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 105443c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 105543c2bbd9SChristoph Hellwig 105647d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 105743c2bbd9SChristoph Hellwig if (!--i->i_openers) 105843c2bbd9SChristoph Hellwig ctx->signal1 = NULL; 105947d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 106043c2bbd9SChristoph Hellwig return 0; 106143c2bbd9SChristoph Hellwig } 106243c2bbd9SChristoph Hellwig 1063bf1ab978SDwayne Grant McConnell static ssize_t __spufs_signal1_read(struct spu_context *ctx, char __user *buf, 106467207b96SArnd Bergmann size_t len, loff_t *pos) 106567207b96SArnd Bergmann { 106617f88cebSDwayne Grant McConnell int ret = 0; 106767207b96SArnd Bergmann u32 data; 106867207b96SArnd Bergmann 106967207b96SArnd Bergmann if (len < 4) 107067207b96SArnd Bergmann return -EINVAL; 107167207b96SArnd Bergmann 107217f88cebSDwayne Grant McConnell if (ctx->csa.spu_chnlcnt_RW[3]) { 107317f88cebSDwayne Grant McConnell data = ctx->csa.spu_chnldata_RW[3]; 107417f88cebSDwayne Grant McConnell ret = 4; 107517f88cebSDwayne Grant McConnell } 10768b3d6663SArnd Bergmann 107717f88cebSDwayne Grant McConnell if (!ret) 107817f88cebSDwayne Grant McConnell goto out; 107917f88cebSDwayne Grant McConnell 108067207b96SArnd Bergmann if (copy_to_user(buf, &data, 4)) 108167207b96SArnd Bergmann return -EFAULT; 108267207b96SArnd Bergmann 108317f88cebSDwayne Grant McConnell out: 108417f88cebSDwayne Grant McConnell return ret; 108567207b96SArnd Bergmann } 108667207b96SArnd Bergmann 1087bf1ab978SDwayne Grant McConnell static ssize_t spufs_signal1_read(struct file *file, char __user *buf, 1088bf1ab978SDwayne Grant McConnell size_t len, loff_t *pos) 1089bf1ab978SDwayne Grant McConnell { 1090bf1ab978SDwayne Grant McConnell int ret; 1091bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 1092bf1ab978SDwayne Grant McConnell 1093c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 1094c9101bdbSChristoph Hellwig if (ret) 1095c9101bdbSChristoph Hellwig return ret; 1096bf1ab978SDwayne Grant McConnell ret = __spufs_signal1_read(ctx, buf, len, pos); 109727b1ea09SChristoph Hellwig spu_release_saved(ctx); 1098bf1ab978SDwayne Grant McConnell 1099bf1ab978SDwayne Grant McConnell return ret; 1100bf1ab978SDwayne Grant McConnell } 1101bf1ab978SDwayne Grant McConnell 110267207b96SArnd Bergmann static ssize_t spufs_signal1_write(struct file *file, const char __user *buf, 110367207b96SArnd Bergmann size_t len, loff_t *pos) 110467207b96SArnd Bergmann { 110567207b96SArnd Bergmann struct spu_context *ctx; 1106c9101bdbSChristoph Hellwig ssize_t ret; 110767207b96SArnd Bergmann u32 data; 110867207b96SArnd Bergmann 110967207b96SArnd Bergmann ctx = file->private_data; 111067207b96SArnd Bergmann 111167207b96SArnd Bergmann if (len < 4) 111267207b96SArnd Bergmann return -EINVAL; 111367207b96SArnd Bergmann 111467207b96SArnd Bergmann if (copy_from_user(&data, buf, 4)) 111567207b96SArnd Bergmann return -EFAULT; 111667207b96SArnd Bergmann 1117c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1118c9101bdbSChristoph Hellwig if (ret) 1119c9101bdbSChristoph Hellwig return ret; 11208b3d6663SArnd Bergmann ctx->ops->signal1_write(ctx, data); 11218b3d6663SArnd Bergmann spu_release(ctx); 112267207b96SArnd Bergmann 112367207b96SArnd Bergmann return 4; 112467207b96SArnd Bergmann } 112567207b96SArnd Bergmann 1126b1e2270fSNick Piggin static int 1127b1e2270fSNick Piggin spufs_signal1_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 11286df10a82SMark Nutter { 112987ff6090SJeremy Kerr #if SPUFS_SIGNAL_MAP_SIZE == 0x1000 113087ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x14000, SPUFS_SIGNAL_MAP_SIZE); 113187ff6090SJeremy Kerr #elif SPUFS_SIGNAL_MAP_SIZE == 0x10000 113227d5bf2aSBenjamin Herrenschmidt /* For 64k pages, both signal1 and signal2 can be used to mmap the whole 113327d5bf2aSBenjamin Herrenschmidt * signal 1 and 2 area 113427d5bf2aSBenjamin Herrenschmidt */ 113587ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x10000, SPUFS_SIGNAL_MAP_SIZE); 113627d5bf2aSBenjamin Herrenschmidt #else 113727d5bf2aSBenjamin Herrenschmidt #error unsupported page size 113827d5bf2aSBenjamin Herrenschmidt #endif 11396df10a82SMark Nutter } 11406df10a82SMark Nutter 1141f0f37e2fSAlexey Dobriyan static const struct vm_operations_struct spufs_signal1_mmap_vmops = { 1142b1e2270fSNick Piggin .fault = spufs_signal1_mmap_fault, 11436df10a82SMark Nutter }; 11446df10a82SMark Nutter 11456df10a82SMark Nutter static int spufs_signal1_mmap(struct file *file, struct vm_area_struct *vma) 11466df10a82SMark Nutter { 11476df10a82SMark Nutter if (!(vma->vm_flags & VM_SHARED)) 11486df10a82SMark Nutter return -EINVAL; 11496df10a82SMark Nutter 115078bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 115164b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 11526df10a82SMark Nutter 11536df10a82SMark Nutter vma->vm_ops = &spufs_signal1_mmap_vmops; 11546df10a82SMark Nutter return 0; 11556df10a82SMark Nutter } 11566df10a82SMark Nutter 11575dfe4c96SArjan van de Ven static const struct file_operations spufs_signal1_fops = { 11586df10a82SMark Nutter .open = spufs_signal1_open, 115943c2bbd9SChristoph Hellwig .release = spufs_signal1_release, 116067207b96SArnd Bergmann .read = spufs_signal1_read, 116167207b96SArnd Bergmann .write = spufs_signal1_write, 11626df10a82SMark Nutter .mmap = spufs_signal1_mmap, 1163fc15351dSArnd Bergmann .llseek = no_llseek, 116467207b96SArnd Bergmann }; 116567207b96SArnd Bergmann 1166d054b36fSJeremy Kerr static const struct file_operations spufs_signal1_nosched_fops = { 1167d054b36fSJeremy Kerr .open = spufs_signal1_open, 1168d054b36fSJeremy Kerr .release = spufs_signal1_release, 1169d054b36fSJeremy Kerr .write = spufs_signal1_write, 1170d054b36fSJeremy Kerr .mmap = spufs_signal1_mmap, 1171fc15351dSArnd Bergmann .llseek = no_llseek, 1172d054b36fSJeremy Kerr }; 1173d054b36fSJeremy Kerr 11746df10a82SMark Nutter static int spufs_signal2_open(struct inode *inode, struct file *file) 11756df10a82SMark Nutter { 11766df10a82SMark Nutter struct spufs_inode_info *i = SPUFS_I(inode); 11776df10a82SMark Nutter struct spu_context *ctx = i->i_ctx; 117843c2bbd9SChristoph Hellwig 117947d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 11806df10a82SMark Nutter file->private_data = ctx; 118143c2bbd9SChristoph Hellwig if (!i->i_openers++) 11826df10a82SMark Nutter ctx->signal2 = inode->i_mapping; 118347d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 11846df10a82SMark Nutter return nonseekable_open(inode, file); 11856df10a82SMark Nutter } 11866df10a82SMark Nutter 118743c2bbd9SChristoph Hellwig static int 118843c2bbd9SChristoph Hellwig spufs_signal2_release(struct inode *inode, struct file *file) 118943c2bbd9SChristoph Hellwig { 119043c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 119143c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 119243c2bbd9SChristoph Hellwig 119347d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 119443c2bbd9SChristoph Hellwig if (!--i->i_openers) 119543c2bbd9SChristoph Hellwig ctx->signal2 = NULL; 119647d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 119743c2bbd9SChristoph Hellwig return 0; 119843c2bbd9SChristoph Hellwig } 119943c2bbd9SChristoph Hellwig 1200bf1ab978SDwayne Grant McConnell static ssize_t __spufs_signal2_read(struct spu_context *ctx, char __user *buf, 120167207b96SArnd Bergmann size_t len, loff_t *pos) 120267207b96SArnd Bergmann { 120317f88cebSDwayne Grant McConnell int ret = 0; 120467207b96SArnd Bergmann u32 data; 120567207b96SArnd Bergmann 120667207b96SArnd Bergmann if (len < 4) 120767207b96SArnd Bergmann return -EINVAL; 120867207b96SArnd Bergmann 120917f88cebSDwayne Grant McConnell if (ctx->csa.spu_chnlcnt_RW[4]) { 121017f88cebSDwayne Grant McConnell data = ctx->csa.spu_chnldata_RW[4]; 121117f88cebSDwayne Grant McConnell ret = 4; 121217f88cebSDwayne Grant McConnell } 12138b3d6663SArnd Bergmann 121417f88cebSDwayne Grant McConnell if (!ret) 121517f88cebSDwayne Grant McConnell goto out; 121617f88cebSDwayne Grant McConnell 121767207b96SArnd Bergmann if (copy_to_user(buf, &data, 4)) 121867207b96SArnd Bergmann return -EFAULT; 121967207b96SArnd Bergmann 122017f88cebSDwayne Grant McConnell out: 1221bf1ab978SDwayne Grant McConnell return ret; 1222bf1ab978SDwayne Grant McConnell } 1223bf1ab978SDwayne Grant McConnell 1224bf1ab978SDwayne Grant McConnell static ssize_t spufs_signal2_read(struct file *file, char __user *buf, 1225bf1ab978SDwayne Grant McConnell size_t len, loff_t *pos) 1226bf1ab978SDwayne Grant McConnell { 1227bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 1228bf1ab978SDwayne Grant McConnell int ret; 1229bf1ab978SDwayne Grant McConnell 1230c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 1231c9101bdbSChristoph Hellwig if (ret) 1232c9101bdbSChristoph Hellwig return ret; 1233bf1ab978SDwayne Grant McConnell ret = __spufs_signal2_read(ctx, buf, len, pos); 123427b1ea09SChristoph Hellwig spu_release_saved(ctx); 1235bf1ab978SDwayne Grant McConnell 1236bf1ab978SDwayne Grant McConnell return ret; 123767207b96SArnd Bergmann } 123867207b96SArnd Bergmann 123967207b96SArnd Bergmann static ssize_t spufs_signal2_write(struct file *file, const char __user *buf, 124067207b96SArnd Bergmann size_t len, loff_t *pos) 124167207b96SArnd Bergmann { 124267207b96SArnd Bergmann struct spu_context *ctx; 1243c9101bdbSChristoph Hellwig ssize_t ret; 124467207b96SArnd Bergmann u32 data; 124567207b96SArnd Bergmann 124667207b96SArnd Bergmann ctx = file->private_data; 124767207b96SArnd Bergmann 124867207b96SArnd Bergmann if (len < 4) 124967207b96SArnd Bergmann return -EINVAL; 125067207b96SArnd Bergmann 125167207b96SArnd Bergmann if (copy_from_user(&data, buf, 4)) 125267207b96SArnd Bergmann return -EFAULT; 125367207b96SArnd Bergmann 1254c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1255c9101bdbSChristoph Hellwig if (ret) 1256c9101bdbSChristoph Hellwig return ret; 12578b3d6663SArnd Bergmann ctx->ops->signal2_write(ctx, data); 12588b3d6663SArnd Bergmann spu_release(ctx); 125967207b96SArnd Bergmann 126067207b96SArnd Bergmann return 4; 126167207b96SArnd Bergmann } 126267207b96SArnd Bergmann 126327d5bf2aSBenjamin Herrenschmidt #if SPUFS_MMAP_4K 1264b1e2270fSNick Piggin static int 1265b1e2270fSNick Piggin spufs_signal2_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 12666df10a82SMark Nutter { 126787ff6090SJeremy Kerr #if SPUFS_SIGNAL_MAP_SIZE == 0x1000 126887ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x1c000, SPUFS_SIGNAL_MAP_SIZE); 126987ff6090SJeremy Kerr #elif SPUFS_SIGNAL_MAP_SIZE == 0x10000 127027d5bf2aSBenjamin Herrenschmidt /* For 64k pages, both signal1 and signal2 can be used to mmap the whole 127127d5bf2aSBenjamin Herrenschmidt * signal 1 and 2 area 127227d5bf2aSBenjamin Herrenschmidt */ 127387ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x10000, SPUFS_SIGNAL_MAP_SIZE); 127427d5bf2aSBenjamin Herrenschmidt #else 127527d5bf2aSBenjamin Herrenschmidt #error unsupported page size 127627d5bf2aSBenjamin Herrenschmidt #endif 12776df10a82SMark Nutter } 12786df10a82SMark Nutter 1279f0f37e2fSAlexey Dobriyan static const struct vm_operations_struct spufs_signal2_mmap_vmops = { 1280b1e2270fSNick Piggin .fault = spufs_signal2_mmap_fault, 12816df10a82SMark Nutter }; 12826df10a82SMark Nutter 12836df10a82SMark Nutter static int spufs_signal2_mmap(struct file *file, struct vm_area_struct *vma) 12846df10a82SMark Nutter { 12856df10a82SMark Nutter if (!(vma->vm_flags & VM_SHARED)) 12866df10a82SMark Nutter return -EINVAL; 12876df10a82SMark Nutter 128878bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 128964b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 12906df10a82SMark Nutter 12916df10a82SMark Nutter vma->vm_ops = &spufs_signal2_mmap_vmops; 12926df10a82SMark Nutter return 0; 12936df10a82SMark Nutter } 129427d5bf2aSBenjamin Herrenschmidt #else /* SPUFS_MMAP_4K */ 129527d5bf2aSBenjamin Herrenschmidt #define spufs_signal2_mmap NULL 129627d5bf2aSBenjamin Herrenschmidt #endif /* !SPUFS_MMAP_4K */ 12976df10a82SMark Nutter 12985dfe4c96SArjan van de Ven static const struct file_operations spufs_signal2_fops = { 12996df10a82SMark Nutter .open = spufs_signal2_open, 130043c2bbd9SChristoph Hellwig .release = spufs_signal2_release, 130167207b96SArnd Bergmann .read = spufs_signal2_read, 130267207b96SArnd Bergmann .write = spufs_signal2_write, 13036df10a82SMark Nutter .mmap = spufs_signal2_mmap, 1304fc15351dSArnd Bergmann .llseek = no_llseek, 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, 1312fc15351dSArnd Bergmann .llseek = no_llseek, 1313d054b36fSJeremy Kerr }; 1314d054b36fSJeremy Kerr 1315104f0cc2SMichael Ellerman /* 1316104f0cc2SMichael Ellerman * This is a wrapper around DEFINE_SIMPLE_ATTRIBUTE which does the 1317104f0cc2SMichael Ellerman * work of acquiring (or not) the SPU context before calling through 1318104f0cc2SMichael Ellerman * to the actual get routine. The set routine is called directly. 1319104f0cc2SMichael Ellerman */ 1320104f0cc2SMichael Ellerman #define SPU_ATTR_NOACQUIRE 0 1321104f0cc2SMichael Ellerman #define SPU_ATTR_ACQUIRE 1 1322104f0cc2SMichael Ellerman #define SPU_ATTR_ACQUIRE_SAVED 2 1323104f0cc2SMichael Ellerman 1324104f0cc2SMichael Ellerman #define DEFINE_SPUFS_ATTRIBUTE(__name, __get, __set, __fmt, __acquire) \ 1325197b1a82SChristoph Hellwig static int __##__get(void *data, u64 *val) \ 1326104f0cc2SMichael Ellerman { \ 1327104f0cc2SMichael Ellerman struct spu_context *ctx = data; \ 1328c9101bdbSChristoph Hellwig int ret = 0; \ 1329104f0cc2SMichael Ellerman \ 1330104f0cc2SMichael Ellerman if (__acquire == SPU_ATTR_ACQUIRE) { \ 1331c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); \ 1332c9101bdbSChristoph Hellwig if (ret) \ 1333c9101bdbSChristoph Hellwig return ret; \ 1334197b1a82SChristoph Hellwig *val = __get(ctx); \ 1335104f0cc2SMichael Ellerman spu_release(ctx); \ 1336104f0cc2SMichael Ellerman } else if (__acquire == SPU_ATTR_ACQUIRE_SAVED) { \ 1337c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); \ 1338c9101bdbSChristoph Hellwig if (ret) \ 1339c9101bdbSChristoph Hellwig return ret; \ 1340197b1a82SChristoph Hellwig *val = __get(ctx); \ 1341104f0cc2SMichael Ellerman spu_release_saved(ctx); \ 1342104f0cc2SMichael Ellerman } else \ 1343197b1a82SChristoph Hellwig *val = __get(ctx); \ 1344104f0cc2SMichael Ellerman \ 1345197b1a82SChristoph Hellwig return 0; \ 1346104f0cc2SMichael Ellerman } \ 1347197b1a82SChristoph Hellwig DEFINE_SPUFS_SIMPLE_ATTRIBUTE(__name, __##__get, __set, __fmt); 1348104f0cc2SMichael Ellerman 1349197b1a82SChristoph Hellwig static int spufs_signal1_type_set(void *data, u64 val) 135067207b96SArnd Bergmann { 135167207b96SArnd Bergmann struct spu_context *ctx = data; 1352c9101bdbSChristoph Hellwig int ret; 135367207b96SArnd Bergmann 1354c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1355c9101bdbSChristoph Hellwig if (ret) 1356c9101bdbSChristoph Hellwig return ret; 13578b3d6663SArnd Bergmann ctx->ops->signal1_type_set(ctx, val); 13588b3d6663SArnd Bergmann spu_release(ctx); 1359197b1a82SChristoph Hellwig 1360197b1a82SChristoph Hellwig return 0; 136167207b96SArnd Bergmann } 136267207b96SArnd Bergmann 1363104f0cc2SMichael Ellerman static u64 spufs_signal1_type_get(struct spu_context *ctx) 1364bf1ab978SDwayne Grant McConnell { 1365bf1ab978SDwayne Grant McConnell return ctx->ops->signal1_type_get(ctx); 1366bf1ab978SDwayne Grant McConnell } 1367104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_signal1_type, spufs_signal1_type_get, 1368af8b44e0SJeremy Kerr spufs_signal1_type_set, "%llu\n", SPU_ATTR_ACQUIRE); 1369bf1ab978SDwayne Grant McConnell 137067207b96SArnd Bergmann 1371197b1a82SChristoph Hellwig static int spufs_signal2_type_set(void *data, u64 val) 137267207b96SArnd Bergmann { 137367207b96SArnd Bergmann struct spu_context *ctx = data; 1374c9101bdbSChristoph Hellwig int ret; 137567207b96SArnd Bergmann 1376c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1377c9101bdbSChristoph Hellwig if (ret) 1378c9101bdbSChristoph Hellwig return ret; 13798b3d6663SArnd Bergmann ctx->ops->signal2_type_set(ctx, val); 13808b3d6663SArnd Bergmann spu_release(ctx); 1381197b1a82SChristoph Hellwig 1382197b1a82SChristoph Hellwig return 0; 138367207b96SArnd Bergmann } 138467207b96SArnd Bergmann 1385104f0cc2SMichael Ellerman static u64 spufs_signal2_type_get(struct spu_context *ctx) 1386bf1ab978SDwayne Grant McConnell { 1387bf1ab978SDwayne Grant McConnell return ctx->ops->signal2_type_get(ctx); 1388bf1ab978SDwayne Grant McConnell } 1389104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get, 1390af8b44e0SJeremy Kerr spufs_signal2_type_set, "%llu\n", SPU_ATTR_ACQUIRE); 139167207b96SArnd Bergmann 139227d5bf2aSBenjamin Herrenschmidt #if SPUFS_MMAP_4K 1393b1e2270fSNick Piggin static int 1394b1e2270fSNick Piggin spufs_mss_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 1395d9379c4bSarnd@arndb.de { 139687ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x0000, SPUFS_MSS_MAP_SIZE); 1397d9379c4bSarnd@arndb.de } 1398d9379c4bSarnd@arndb.de 1399f0f37e2fSAlexey Dobriyan static const struct vm_operations_struct spufs_mss_mmap_vmops = { 1400b1e2270fSNick Piggin .fault = spufs_mss_mmap_fault, 1401d9379c4bSarnd@arndb.de }; 1402d9379c4bSarnd@arndb.de 1403d9379c4bSarnd@arndb.de /* 1404d9379c4bSarnd@arndb.de * mmap support for problem state MFC DMA area [0x0000 - 0x0fff]. 1405d9379c4bSarnd@arndb.de */ 1406d9379c4bSarnd@arndb.de static int spufs_mss_mmap(struct file *file, struct vm_area_struct *vma) 1407d9379c4bSarnd@arndb.de { 1408d9379c4bSarnd@arndb.de if (!(vma->vm_flags & VM_SHARED)) 1409d9379c4bSarnd@arndb.de return -EINVAL; 1410d9379c4bSarnd@arndb.de 141178bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 141264b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 1413d9379c4bSarnd@arndb.de 1414d9379c4bSarnd@arndb.de vma->vm_ops = &spufs_mss_mmap_vmops; 1415d9379c4bSarnd@arndb.de return 0; 1416d9379c4bSarnd@arndb.de } 141727d5bf2aSBenjamin Herrenschmidt #else /* SPUFS_MMAP_4K */ 141827d5bf2aSBenjamin Herrenschmidt #define spufs_mss_mmap NULL 141927d5bf2aSBenjamin Herrenschmidt #endif /* !SPUFS_MMAP_4K */ 1420d9379c4bSarnd@arndb.de 1421d9379c4bSarnd@arndb.de static int spufs_mss_open(struct inode *inode, struct file *file) 1422d9379c4bSarnd@arndb.de { 1423d9379c4bSarnd@arndb.de struct spufs_inode_info *i = SPUFS_I(inode); 142417e0e270SBenjamin Herrenschmidt struct spu_context *ctx = i->i_ctx; 1425d9379c4bSarnd@arndb.de 1426d9379c4bSarnd@arndb.de file->private_data = i->i_ctx; 142743c2bbd9SChristoph Hellwig 142847d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 142943c2bbd9SChristoph Hellwig if (!i->i_openers++) 143017e0e270SBenjamin Herrenschmidt ctx->mss = inode->i_mapping; 143147d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 1432d9379c4bSarnd@arndb.de return nonseekable_open(inode, file); 1433d9379c4bSarnd@arndb.de } 1434d9379c4bSarnd@arndb.de 143543c2bbd9SChristoph Hellwig static int 143643c2bbd9SChristoph Hellwig spufs_mss_release(struct inode *inode, struct file *file) 143743c2bbd9SChristoph Hellwig { 143843c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 143943c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 144043c2bbd9SChristoph Hellwig 144147d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 144243c2bbd9SChristoph Hellwig if (!--i->i_openers) 144343c2bbd9SChristoph Hellwig ctx->mss = NULL; 144447d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 144543c2bbd9SChristoph Hellwig return 0; 144643c2bbd9SChristoph Hellwig } 144743c2bbd9SChristoph Hellwig 14485dfe4c96SArjan van de Ven static const struct file_operations spufs_mss_fops = { 1449d9379c4bSarnd@arndb.de .open = spufs_mss_open, 145043c2bbd9SChristoph Hellwig .release = spufs_mss_release, 1451d9379c4bSarnd@arndb.de .mmap = spufs_mss_mmap, 1452fc15351dSArnd Bergmann .llseek = no_llseek, 145327d5bf2aSBenjamin Herrenschmidt }; 145427d5bf2aSBenjamin Herrenschmidt 1455b1e2270fSNick Piggin static int 1456b1e2270fSNick Piggin spufs_psmap_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 145727d5bf2aSBenjamin Herrenschmidt { 145887ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x0000, SPUFS_PS_MAP_SIZE); 145927d5bf2aSBenjamin Herrenschmidt } 146027d5bf2aSBenjamin Herrenschmidt 1461f0f37e2fSAlexey Dobriyan static const struct vm_operations_struct spufs_psmap_mmap_vmops = { 1462b1e2270fSNick Piggin .fault = spufs_psmap_mmap_fault, 146327d5bf2aSBenjamin Herrenschmidt }; 146427d5bf2aSBenjamin Herrenschmidt 146527d5bf2aSBenjamin Herrenschmidt /* 146627d5bf2aSBenjamin Herrenschmidt * mmap support for full problem state area [0x00000 - 0x1ffff]. 146727d5bf2aSBenjamin Herrenschmidt */ 146827d5bf2aSBenjamin Herrenschmidt static int spufs_psmap_mmap(struct file *file, struct vm_area_struct *vma) 146927d5bf2aSBenjamin Herrenschmidt { 147027d5bf2aSBenjamin Herrenschmidt if (!(vma->vm_flags & VM_SHARED)) 147127d5bf2aSBenjamin Herrenschmidt return -EINVAL; 147227d5bf2aSBenjamin Herrenschmidt 147378bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 147464b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 147527d5bf2aSBenjamin Herrenschmidt 147627d5bf2aSBenjamin Herrenschmidt vma->vm_ops = &spufs_psmap_mmap_vmops; 147727d5bf2aSBenjamin Herrenschmidt return 0; 147827d5bf2aSBenjamin Herrenschmidt } 147927d5bf2aSBenjamin Herrenschmidt 148027d5bf2aSBenjamin Herrenschmidt static int spufs_psmap_open(struct inode *inode, struct file *file) 148127d5bf2aSBenjamin Herrenschmidt { 148227d5bf2aSBenjamin Herrenschmidt struct spufs_inode_info *i = SPUFS_I(inode); 148317e0e270SBenjamin Herrenschmidt struct spu_context *ctx = i->i_ctx; 148427d5bf2aSBenjamin Herrenschmidt 148547d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 148627d5bf2aSBenjamin Herrenschmidt file->private_data = i->i_ctx; 148743c2bbd9SChristoph Hellwig if (!i->i_openers++) 148817e0e270SBenjamin Herrenschmidt ctx->psmap = inode->i_mapping; 148947d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 149027d5bf2aSBenjamin Herrenschmidt return nonseekable_open(inode, file); 149127d5bf2aSBenjamin Herrenschmidt } 149227d5bf2aSBenjamin Herrenschmidt 149343c2bbd9SChristoph Hellwig static int 149443c2bbd9SChristoph Hellwig spufs_psmap_release(struct inode *inode, struct file *file) 149543c2bbd9SChristoph Hellwig { 149643c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 149743c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 149843c2bbd9SChristoph Hellwig 149947d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 150043c2bbd9SChristoph Hellwig if (!--i->i_openers) 150143c2bbd9SChristoph Hellwig ctx->psmap = NULL; 150247d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 150343c2bbd9SChristoph Hellwig return 0; 150443c2bbd9SChristoph Hellwig } 150543c2bbd9SChristoph Hellwig 15065dfe4c96SArjan van de Ven static const struct file_operations spufs_psmap_fops = { 150727d5bf2aSBenjamin Herrenschmidt .open = spufs_psmap_open, 150843c2bbd9SChristoph Hellwig .release = spufs_psmap_release, 150927d5bf2aSBenjamin Herrenschmidt .mmap = spufs_psmap_mmap, 1510fc15351dSArnd Bergmann .llseek = no_llseek, 1511d9379c4bSarnd@arndb.de }; 1512d9379c4bSarnd@arndb.de 1513d9379c4bSarnd@arndb.de 151427d5bf2aSBenjamin Herrenschmidt #if SPUFS_MMAP_4K 1515b1e2270fSNick Piggin static int 1516b1e2270fSNick Piggin spufs_mfc_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) 15176df10a82SMark Nutter { 151887ff6090SJeremy Kerr return spufs_ps_fault(vma, vmf, 0x3000, SPUFS_MFC_MAP_SIZE); 15196df10a82SMark Nutter } 15206df10a82SMark Nutter 1521f0f37e2fSAlexey Dobriyan static const struct vm_operations_struct spufs_mfc_mmap_vmops = { 1522b1e2270fSNick Piggin .fault = spufs_mfc_mmap_fault, 15236df10a82SMark Nutter }; 15246df10a82SMark Nutter 15256df10a82SMark Nutter /* 15266df10a82SMark Nutter * mmap support for problem state MFC DMA area [0x0000 - 0x0fff]. 15276df10a82SMark Nutter */ 15286df10a82SMark Nutter static int spufs_mfc_mmap(struct file *file, struct vm_area_struct *vma) 15296df10a82SMark Nutter { 15306df10a82SMark Nutter if (!(vma->vm_flags & VM_SHARED)) 15316df10a82SMark Nutter return -EINVAL; 15326df10a82SMark Nutter 153378bde53eSBenjamin Herrenschmidt vma->vm_flags |= VM_IO | VM_PFNMAP; 153464b3d0e8SBenjamin Herrenschmidt vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 15356df10a82SMark Nutter 15366df10a82SMark Nutter vma->vm_ops = &spufs_mfc_mmap_vmops; 15376df10a82SMark Nutter return 0; 15386df10a82SMark Nutter } 153927d5bf2aSBenjamin Herrenschmidt #else /* SPUFS_MMAP_4K */ 154027d5bf2aSBenjamin Herrenschmidt #define spufs_mfc_mmap NULL 154127d5bf2aSBenjamin Herrenschmidt #endif /* !SPUFS_MMAP_4K */ 1542a33a7d73SArnd Bergmann 1543a33a7d73SArnd Bergmann static int spufs_mfc_open(struct inode *inode, struct file *file) 1544a33a7d73SArnd Bergmann { 1545a33a7d73SArnd Bergmann struct spufs_inode_info *i = SPUFS_I(inode); 1546a33a7d73SArnd Bergmann struct spu_context *ctx = i->i_ctx; 1547a33a7d73SArnd Bergmann 1548a33a7d73SArnd Bergmann /* we don't want to deal with DMA into other processes */ 1549a33a7d73SArnd Bergmann if (ctx->owner != current->mm) 1550a33a7d73SArnd Bergmann return -EINVAL; 1551a33a7d73SArnd Bergmann 1552a33a7d73SArnd Bergmann if (atomic_read(&inode->i_count) != 1) 1553a33a7d73SArnd Bergmann return -EBUSY; 1554a33a7d73SArnd Bergmann 155547d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 1556a33a7d73SArnd Bergmann file->private_data = ctx; 155743c2bbd9SChristoph Hellwig if (!i->i_openers++) 155817e0e270SBenjamin Herrenschmidt ctx->mfc = inode->i_mapping; 155947d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 1560a33a7d73SArnd Bergmann return nonseekable_open(inode, file); 1561a33a7d73SArnd Bergmann } 1562a33a7d73SArnd Bergmann 156343c2bbd9SChristoph Hellwig static int 156443c2bbd9SChristoph Hellwig spufs_mfc_release(struct inode *inode, struct file *file) 156543c2bbd9SChristoph Hellwig { 156643c2bbd9SChristoph Hellwig struct spufs_inode_info *i = SPUFS_I(inode); 156743c2bbd9SChristoph Hellwig struct spu_context *ctx = i->i_ctx; 156843c2bbd9SChristoph Hellwig 156947d3a5faSChristoph Hellwig mutex_lock(&ctx->mapping_lock); 157043c2bbd9SChristoph Hellwig if (!--i->i_openers) 157143c2bbd9SChristoph Hellwig ctx->mfc = NULL; 157247d3a5faSChristoph Hellwig mutex_unlock(&ctx->mapping_lock); 157343c2bbd9SChristoph Hellwig return 0; 157443c2bbd9SChristoph Hellwig } 157543c2bbd9SChristoph Hellwig 1576a33a7d73SArnd Bergmann /* interrupt-level mfc callback function. */ 1577a33a7d73SArnd Bergmann void spufs_mfc_callback(struct spu *spu) 1578a33a7d73SArnd Bergmann { 1579a33a7d73SArnd Bergmann struct spu_context *ctx = spu->ctx; 1580a33a7d73SArnd Bergmann 1581e65c2f6fSLuke Browning if (!ctx) 1582e65c2f6fSLuke Browning return; 1583e65c2f6fSLuke Browning 1584a33a7d73SArnd Bergmann wake_up_all(&ctx->mfc_wq); 1585a33a7d73SArnd Bergmann 1586e48b1b45SHarvey Harrison pr_debug("%s %s\n", __func__, spu->name); 1587a33a7d73SArnd Bergmann if (ctx->mfc_fasync) { 1588a33a7d73SArnd Bergmann u32 free_elements, tagstatus; 1589a33a7d73SArnd Bergmann unsigned int mask; 1590a33a7d73SArnd Bergmann 1591a33a7d73SArnd Bergmann /* no need for spu_acquire in interrupt context */ 1592a33a7d73SArnd Bergmann free_elements = ctx->ops->get_mfc_free_elements(ctx); 1593a33a7d73SArnd Bergmann tagstatus = ctx->ops->read_mfc_tagstatus(ctx); 1594a33a7d73SArnd Bergmann 1595a33a7d73SArnd Bergmann mask = 0; 1596a33a7d73SArnd Bergmann if (free_elements & 0xffff) 1597a33a7d73SArnd Bergmann mask |= POLLOUT; 1598a33a7d73SArnd Bergmann if (tagstatus & ctx->tagwait) 1599a33a7d73SArnd Bergmann mask |= POLLIN; 1600a33a7d73SArnd Bergmann 1601a33a7d73SArnd Bergmann kill_fasync(&ctx->mfc_fasync, SIGIO, mask); 1602a33a7d73SArnd Bergmann } 1603a33a7d73SArnd Bergmann } 1604a33a7d73SArnd Bergmann 1605a33a7d73SArnd Bergmann static int spufs_read_mfc_tagstatus(struct spu_context *ctx, u32 *status) 1606a33a7d73SArnd Bergmann { 1607a33a7d73SArnd Bergmann /* See if there is one tag group is complete */ 1608a33a7d73SArnd Bergmann /* FIXME we need locking around tagwait */ 1609a33a7d73SArnd Bergmann *status = ctx->ops->read_mfc_tagstatus(ctx) & ctx->tagwait; 1610a33a7d73SArnd Bergmann ctx->tagwait &= ~*status; 1611a33a7d73SArnd Bergmann if (*status) 1612a33a7d73SArnd Bergmann return 1; 1613a33a7d73SArnd Bergmann 1614a33a7d73SArnd Bergmann /* enable interrupt waiting for any tag group, 1615a33a7d73SArnd Bergmann may silently fail if interrupts are already enabled */ 1616a33a7d73SArnd Bergmann ctx->ops->set_mfc_query(ctx, ctx->tagwait, 1); 1617a33a7d73SArnd Bergmann return 0; 1618a33a7d73SArnd Bergmann } 1619a33a7d73SArnd Bergmann 1620a33a7d73SArnd Bergmann static ssize_t spufs_mfc_read(struct file *file, char __user *buffer, 1621a33a7d73SArnd Bergmann size_t size, loff_t *pos) 1622a33a7d73SArnd Bergmann { 1623a33a7d73SArnd Bergmann struct spu_context *ctx = file->private_data; 1624a33a7d73SArnd Bergmann int ret = -EINVAL; 1625a33a7d73SArnd Bergmann u32 status; 1626a33a7d73SArnd Bergmann 1627a33a7d73SArnd Bergmann if (size != 4) 1628a33a7d73SArnd Bergmann goto out; 1629a33a7d73SArnd Bergmann 1630c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1631c9101bdbSChristoph Hellwig if (ret) 1632c9101bdbSChristoph Hellwig return ret; 1633c9101bdbSChristoph Hellwig 1634c9101bdbSChristoph Hellwig ret = -EINVAL; 1635a33a7d73SArnd Bergmann if (file->f_flags & O_NONBLOCK) { 1636a33a7d73SArnd Bergmann status = ctx->ops->read_mfc_tagstatus(ctx); 1637a33a7d73SArnd Bergmann if (!(status & ctx->tagwait)) 1638a33a7d73SArnd Bergmann ret = -EAGAIN; 1639a33a7d73SArnd Bergmann else 1640c9101bdbSChristoph Hellwig /* XXX(hch): shouldn't we clear ret here? */ 1641a33a7d73SArnd Bergmann ctx->tagwait &= ~status; 1642a33a7d73SArnd Bergmann } else { 1643a33a7d73SArnd Bergmann ret = spufs_wait(ctx->mfc_wq, 1644a33a7d73SArnd Bergmann spufs_read_mfc_tagstatus(ctx, &status)); 1645a33a7d73SArnd Bergmann if (ret) 1646a33a7d73SArnd Bergmann goto out; 1647eebead5bSChristoph Hellwig } 1648eebead5bSChristoph Hellwig spu_release(ctx); 1649a33a7d73SArnd Bergmann 1650a33a7d73SArnd Bergmann ret = 4; 1651a33a7d73SArnd Bergmann if (copy_to_user(buffer, &status, 4)) 1652a33a7d73SArnd Bergmann ret = -EFAULT; 1653a33a7d73SArnd Bergmann 1654a33a7d73SArnd Bergmann out: 1655a33a7d73SArnd Bergmann return ret; 1656a33a7d73SArnd Bergmann } 1657a33a7d73SArnd Bergmann 1658a33a7d73SArnd Bergmann static int spufs_check_valid_dma(struct mfc_dma_command *cmd) 1659a33a7d73SArnd Bergmann { 16609477e455SStephen Rothwell pr_debug("queueing DMA %x %llx %x %x %x\n", cmd->lsa, 1661a33a7d73SArnd Bergmann cmd->ea, cmd->size, cmd->tag, cmd->cmd); 1662a33a7d73SArnd Bergmann 1663a33a7d73SArnd Bergmann switch (cmd->cmd) { 1664a33a7d73SArnd Bergmann case MFC_PUT_CMD: 1665a33a7d73SArnd Bergmann case MFC_PUTF_CMD: 1666a33a7d73SArnd Bergmann case MFC_PUTB_CMD: 1667a33a7d73SArnd Bergmann case MFC_GET_CMD: 1668a33a7d73SArnd Bergmann case MFC_GETF_CMD: 1669a33a7d73SArnd Bergmann case MFC_GETB_CMD: 1670a33a7d73SArnd Bergmann break; 1671a33a7d73SArnd Bergmann default: 1672a33a7d73SArnd Bergmann pr_debug("invalid DMA opcode %x\n", cmd->cmd); 1673a33a7d73SArnd Bergmann return -EIO; 1674a33a7d73SArnd Bergmann } 1675a33a7d73SArnd Bergmann 1676a33a7d73SArnd Bergmann if ((cmd->lsa & 0xf) != (cmd->ea &0xf)) { 16779477e455SStephen Rothwell pr_debug("invalid DMA alignment, ea %llx lsa %x\n", 1678a33a7d73SArnd Bergmann cmd->ea, cmd->lsa); 1679a33a7d73SArnd Bergmann return -EIO; 1680a33a7d73SArnd Bergmann } 1681a33a7d73SArnd Bergmann 1682a33a7d73SArnd Bergmann switch (cmd->size & 0xf) { 1683a33a7d73SArnd Bergmann case 1: 1684a33a7d73SArnd Bergmann break; 1685a33a7d73SArnd Bergmann case 2: 1686a33a7d73SArnd Bergmann if (cmd->lsa & 1) 1687a33a7d73SArnd Bergmann goto error; 1688a33a7d73SArnd Bergmann break; 1689a33a7d73SArnd Bergmann case 4: 1690a33a7d73SArnd Bergmann if (cmd->lsa & 3) 1691a33a7d73SArnd Bergmann goto error; 1692a33a7d73SArnd Bergmann break; 1693a33a7d73SArnd Bergmann case 8: 1694a33a7d73SArnd Bergmann if (cmd->lsa & 7) 1695a33a7d73SArnd Bergmann goto error; 1696a33a7d73SArnd Bergmann break; 1697a33a7d73SArnd Bergmann case 0: 1698a33a7d73SArnd Bergmann if (cmd->lsa & 15) 1699a33a7d73SArnd Bergmann goto error; 1700a33a7d73SArnd Bergmann break; 1701a33a7d73SArnd Bergmann error: 1702a33a7d73SArnd Bergmann default: 1703a33a7d73SArnd Bergmann pr_debug("invalid DMA alignment %x for size %x\n", 1704a33a7d73SArnd Bergmann cmd->lsa & 0xf, cmd->size); 1705a33a7d73SArnd Bergmann return -EIO; 1706a33a7d73SArnd Bergmann } 1707a33a7d73SArnd Bergmann 1708a33a7d73SArnd Bergmann if (cmd->size > 16 * 1024) { 1709a33a7d73SArnd Bergmann pr_debug("invalid DMA size %x\n", cmd->size); 1710a33a7d73SArnd Bergmann return -EIO; 1711a33a7d73SArnd Bergmann } 1712a33a7d73SArnd Bergmann 1713a33a7d73SArnd Bergmann if (cmd->tag & 0xfff0) { 1714a33a7d73SArnd Bergmann /* we reserve the higher tag numbers for kernel use */ 1715a33a7d73SArnd Bergmann pr_debug("invalid DMA tag\n"); 1716a33a7d73SArnd Bergmann return -EIO; 1717a33a7d73SArnd Bergmann } 1718a33a7d73SArnd Bergmann 1719a33a7d73SArnd Bergmann if (cmd->class) { 1720a33a7d73SArnd Bergmann /* not supported in this version */ 1721a33a7d73SArnd Bergmann pr_debug("invalid DMA class\n"); 1722a33a7d73SArnd Bergmann return -EIO; 1723a33a7d73SArnd Bergmann } 1724a33a7d73SArnd Bergmann 1725a33a7d73SArnd Bergmann return 0; 1726a33a7d73SArnd Bergmann } 1727a33a7d73SArnd Bergmann 1728a33a7d73SArnd Bergmann static int spu_send_mfc_command(struct spu_context *ctx, 1729a33a7d73SArnd Bergmann struct mfc_dma_command cmd, 1730a33a7d73SArnd Bergmann int *error) 1731a33a7d73SArnd Bergmann { 1732a33a7d73SArnd Bergmann *error = ctx->ops->send_mfc_command(ctx, &cmd); 1733a33a7d73SArnd Bergmann if (*error == -EAGAIN) { 1734a33a7d73SArnd Bergmann /* wait for any tag group to complete 1735a33a7d73SArnd Bergmann so we have space for the new command */ 1736a33a7d73SArnd Bergmann ctx->ops->set_mfc_query(ctx, ctx->tagwait, 1); 1737a33a7d73SArnd Bergmann /* try again, because the queue might be 1738a33a7d73SArnd Bergmann empty again */ 1739a33a7d73SArnd Bergmann *error = ctx->ops->send_mfc_command(ctx, &cmd); 1740a33a7d73SArnd Bergmann if (*error == -EAGAIN) 1741a33a7d73SArnd Bergmann return 0; 1742a33a7d73SArnd Bergmann } 1743a33a7d73SArnd Bergmann return 1; 1744a33a7d73SArnd Bergmann } 1745a33a7d73SArnd Bergmann 1746a33a7d73SArnd Bergmann static ssize_t spufs_mfc_write(struct file *file, const char __user *buffer, 1747a33a7d73SArnd Bergmann size_t size, loff_t *pos) 1748a33a7d73SArnd Bergmann { 1749a33a7d73SArnd Bergmann struct spu_context *ctx = file->private_data; 1750a33a7d73SArnd Bergmann struct mfc_dma_command cmd; 1751a33a7d73SArnd Bergmann int ret = -EINVAL; 1752a33a7d73SArnd Bergmann 1753a33a7d73SArnd Bergmann if (size != sizeof cmd) 1754a33a7d73SArnd Bergmann goto out; 1755a33a7d73SArnd Bergmann 1756a33a7d73SArnd Bergmann ret = -EFAULT; 1757a33a7d73SArnd Bergmann if (copy_from_user(&cmd, buffer, sizeof cmd)) 1758a33a7d73SArnd Bergmann goto out; 1759a33a7d73SArnd Bergmann 1760a33a7d73SArnd Bergmann ret = spufs_check_valid_dma(&cmd); 1761a33a7d73SArnd Bergmann if (ret) 1762a33a7d73SArnd Bergmann goto out; 1763a33a7d73SArnd Bergmann 1764c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1765c9101bdbSChristoph Hellwig if (ret) 1766c9101bdbSChristoph Hellwig goto out; 1767c9101bdbSChristoph Hellwig 176833bfd7a7SArnd Bergmann ret = spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE); 1769577f8f10SAkinobu Mita if (ret) 1770577f8f10SAkinobu Mita goto out; 1771577f8f10SAkinobu Mita 1772a33a7d73SArnd Bergmann if (file->f_flags & O_NONBLOCK) { 1773a33a7d73SArnd Bergmann ret = ctx->ops->send_mfc_command(ctx, &cmd); 1774a33a7d73SArnd Bergmann } else { 1775a33a7d73SArnd Bergmann int status; 1776a33a7d73SArnd Bergmann ret = spufs_wait(ctx->mfc_wq, 1777a33a7d73SArnd Bergmann spu_send_mfc_command(ctx, cmd, &status)); 1778eebead5bSChristoph Hellwig if (ret) 1779eebead5bSChristoph Hellwig goto out; 1780a33a7d73SArnd Bergmann if (status) 1781a33a7d73SArnd Bergmann ret = status; 1782a33a7d73SArnd Bergmann } 1783a33a7d73SArnd Bergmann 1784a33a7d73SArnd Bergmann if (ret) 1785933b0e35SKazunori Asayama goto out_unlock; 1786a33a7d73SArnd Bergmann 1787a33a7d73SArnd Bergmann ctx->tagwait |= 1 << cmd.tag; 17883692dc66SMasato Noguchi ret = size; 1789a33a7d73SArnd Bergmann 1790933b0e35SKazunori Asayama out_unlock: 1791933b0e35SKazunori Asayama spu_release(ctx); 1792a33a7d73SArnd Bergmann out: 1793a33a7d73SArnd Bergmann return ret; 1794a33a7d73SArnd Bergmann } 1795a33a7d73SArnd Bergmann 1796a33a7d73SArnd Bergmann static unsigned int spufs_mfc_poll(struct file *file,poll_table *wait) 1797a33a7d73SArnd Bergmann { 1798a33a7d73SArnd Bergmann struct spu_context *ctx = file->private_data; 1799a33a7d73SArnd Bergmann u32 free_elements, tagstatus; 1800a33a7d73SArnd Bergmann unsigned int mask; 1801a33a7d73SArnd Bergmann 1802933b0e35SKazunori Asayama poll_wait(file, &ctx->mfc_wq, wait); 1803933b0e35SKazunori Asayama 1804c9101bdbSChristoph Hellwig /* 1805c9101bdbSChristoph Hellwig * For now keep this uninterruptible and also ignore the rule 1806c9101bdbSChristoph Hellwig * that poll should not sleep. Will be fixed later. 1807c9101bdbSChristoph Hellwig */ 1808c9101bdbSChristoph Hellwig mutex_lock(&ctx->state_mutex); 1809a33a7d73SArnd Bergmann ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2); 1810a33a7d73SArnd Bergmann free_elements = ctx->ops->get_mfc_free_elements(ctx); 1811a33a7d73SArnd Bergmann tagstatus = ctx->ops->read_mfc_tagstatus(ctx); 1812a33a7d73SArnd Bergmann spu_release(ctx); 1813a33a7d73SArnd Bergmann 1814a33a7d73SArnd Bergmann mask = 0; 1815a33a7d73SArnd Bergmann if (free_elements & 0xffff) 1816a33a7d73SArnd Bergmann mask |= POLLOUT | POLLWRNORM; 1817a33a7d73SArnd Bergmann if (tagstatus & ctx->tagwait) 1818a33a7d73SArnd Bergmann mask |= POLLIN | POLLRDNORM; 1819a33a7d73SArnd Bergmann 1820e48b1b45SHarvey Harrison pr_debug("%s: free %d tagstatus %d tagwait %d\n", __func__, 1821a33a7d73SArnd Bergmann free_elements, tagstatus, ctx->tagwait); 1822a33a7d73SArnd Bergmann 1823a33a7d73SArnd Bergmann return mask; 1824a33a7d73SArnd Bergmann } 1825a33a7d73SArnd Bergmann 182673b6af8aSAl Viro static int spufs_mfc_flush(struct file *file, fl_owner_t id) 1827a33a7d73SArnd Bergmann { 1828a33a7d73SArnd Bergmann struct spu_context *ctx = file->private_data; 1829a33a7d73SArnd Bergmann int ret; 1830a33a7d73SArnd Bergmann 1831c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1832c9101bdbSChristoph Hellwig if (ret) 1833eebead5bSChristoph Hellwig goto out; 1834a33a7d73SArnd Bergmann #if 0 1835a33a7d73SArnd Bergmann /* this currently hangs */ 1836a33a7d73SArnd Bergmann ret = spufs_wait(ctx->mfc_wq, 1837a33a7d73SArnd Bergmann ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2)); 1838a33a7d73SArnd Bergmann if (ret) 1839a33a7d73SArnd Bergmann goto out; 1840a33a7d73SArnd Bergmann ret = spufs_wait(ctx->mfc_wq, 1841a33a7d73SArnd Bergmann ctx->ops->read_mfc_tagstatus(ctx) == ctx->tagwait); 1842eebead5bSChristoph Hellwig if (ret) 1843eebead5bSChristoph Hellwig goto out; 1844a33a7d73SArnd Bergmann #else 1845a33a7d73SArnd Bergmann ret = 0; 1846a33a7d73SArnd Bergmann #endif 1847a33a7d73SArnd Bergmann spu_release(ctx); 1848eebead5bSChristoph Hellwig out: 1849a33a7d73SArnd Bergmann return ret; 1850a33a7d73SArnd Bergmann } 1851a33a7d73SArnd Bergmann 185202c24a82SJosef Bacik static int spufs_mfc_fsync(struct file *file, loff_t start, loff_t end, int datasync) 1853a33a7d73SArnd Bergmann { 1854496ad9aaSAl Viro struct inode *inode = file_inode(file); 185502c24a82SJosef Bacik int err = filemap_write_and_wait_range(inode->i_mapping, start, end); 185602c24a82SJosef Bacik if (!err) { 185702c24a82SJosef Bacik mutex_lock(&inode->i_mutex); 185802c24a82SJosef Bacik err = spufs_mfc_flush(file, NULL); 185902c24a82SJosef Bacik mutex_unlock(&inode->i_mutex); 186002c24a82SJosef Bacik } 186102c24a82SJosef Bacik return err; 1862a33a7d73SArnd Bergmann } 1863a33a7d73SArnd Bergmann 1864a33a7d73SArnd Bergmann static int spufs_mfc_fasync(int fd, struct file *file, int on) 1865a33a7d73SArnd Bergmann { 1866a33a7d73SArnd Bergmann struct spu_context *ctx = file->private_data; 1867a33a7d73SArnd Bergmann 1868a33a7d73SArnd Bergmann return fasync_helper(fd, file, on, &ctx->mfc_fasync); 1869a33a7d73SArnd Bergmann } 1870a33a7d73SArnd Bergmann 18715dfe4c96SArjan van de Ven static const struct file_operations spufs_mfc_fops = { 1872a33a7d73SArnd Bergmann .open = spufs_mfc_open, 187343c2bbd9SChristoph Hellwig .release = spufs_mfc_release, 1874a33a7d73SArnd Bergmann .read = spufs_mfc_read, 1875a33a7d73SArnd Bergmann .write = spufs_mfc_write, 1876a33a7d73SArnd Bergmann .poll = spufs_mfc_poll, 1877a33a7d73SArnd Bergmann .flush = spufs_mfc_flush, 1878a33a7d73SArnd Bergmann .fsync = spufs_mfc_fsync, 1879a33a7d73SArnd Bergmann .fasync = spufs_mfc_fasync, 18806df10a82SMark Nutter .mmap = spufs_mfc_mmap, 1881fc15351dSArnd Bergmann .llseek = no_llseek, 1882a33a7d73SArnd Bergmann }; 1883a33a7d73SArnd Bergmann 1884197b1a82SChristoph Hellwig static int spufs_npc_set(void *data, u64 val) 188567207b96SArnd Bergmann { 188667207b96SArnd Bergmann struct spu_context *ctx = data; 1887c9101bdbSChristoph Hellwig int ret; 1888c9101bdbSChristoph Hellwig 1889c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 1890c9101bdbSChristoph Hellwig if (ret) 1891c9101bdbSChristoph Hellwig return ret; 18928b3d6663SArnd Bergmann ctx->ops->npc_write(ctx, val); 18938b3d6663SArnd Bergmann spu_release(ctx); 1894197b1a82SChristoph Hellwig 1895197b1a82SChristoph Hellwig return 0; 189667207b96SArnd Bergmann } 189767207b96SArnd Bergmann 1898104f0cc2SMichael Ellerman static u64 spufs_npc_get(struct spu_context *ctx) 189978810ff6SMichael Ellerman { 190078810ff6SMichael Ellerman return ctx->ops->npc_read(ctx); 190178810ff6SMichael Ellerman } 1902104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_npc_ops, spufs_npc_get, spufs_npc_set, 1903104f0cc2SMichael Ellerman "0x%llx\n", SPU_ATTR_ACQUIRE); 190467207b96SArnd Bergmann 1905197b1a82SChristoph Hellwig static int spufs_decr_set(void *data, u64 val) 19068b3d6663SArnd Bergmann { 19078b3d6663SArnd Bergmann struct spu_context *ctx = data; 19088b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 1909c9101bdbSChristoph Hellwig int ret; 1910c9101bdbSChristoph Hellwig 1911c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 1912c9101bdbSChristoph Hellwig if (ret) 1913c9101bdbSChristoph Hellwig return ret; 19148b3d6663SArnd Bergmann lscsa->decr.slot[0] = (u32) val; 191527b1ea09SChristoph Hellwig spu_release_saved(ctx); 1916197b1a82SChristoph Hellwig 1917197b1a82SChristoph Hellwig return 0; 19188b3d6663SArnd Bergmann } 19198b3d6663SArnd Bergmann 1920104f0cc2SMichael Ellerman static u64 spufs_decr_get(struct spu_context *ctx) 19218b3d6663SArnd Bergmann { 19228b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 1923bf1ab978SDwayne Grant McConnell return lscsa->decr.slot[0]; 1924bf1ab978SDwayne Grant McConnell } 1925104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_decr_ops, spufs_decr_get, spufs_decr_set, 1926104f0cc2SMichael Ellerman "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED); 19278b3d6663SArnd Bergmann 1928197b1a82SChristoph Hellwig static int spufs_decr_status_set(void *data, u64 val) 19298b3d6663SArnd Bergmann { 19308b3d6663SArnd Bergmann struct spu_context *ctx = data; 1931c9101bdbSChristoph Hellwig int ret; 1932c9101bdbSChristoph Hellwig 1933c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 1934c9101bdbSChristoph Hellwig if (ret) 1935c9101bdbSChristoph Hellwig return ret; 1936d40a01d4SMasato Noguchi if (val) 1937d40a01d4SMasato Noguchi ctx->csa.priv2.mfc_control_RW |= MFC_CNTL_DECREMENTER_RUNNING; 1938d40a01d4SMasato Noguchi else 1939d40a01d4SMasato Noguchi ctx->csa.priv2.mfc_control_RW &= ~MFC_CNTL_DECREMENTER_RUNNING; 194027b1ea09SChristoph Hellwig spu_release_saved(ctx); 1941197b1a82SChristoph Hellwig 1942197b1a82SChristoph Hellwig return 0; 19438b3d6663SArnd Bergmann } 19448b3d6663SArnd Bergmann 1945104f0cc2SMichael Ellerman static u64 spufs_decr_status_get(struct spu_context *ctx) 19468b3d6663SArnd Bergmann { 1947d40a01d4SMasato Noguchi if (ctx->csa.priv2.mfc_control_RW & MFC_CNTL_DECREMENTER_RUNNING) 1948d40a01d4SMasato Noguchi return SPU_DECR_STATUS_RUNNING; 1949d40a01d4SMasato Noguchi else 1950d40a01d4SMasato Noguchi return 0; 1951bf1ab978SDwayne Grant McConnell } 1952104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_decr_status_ops, spufs_decr_status_get, 1953104f0cc2SMichael Ellerman spufs_decr_status_set, "0x%llx\n", 1954104f0cc2SMichael Ellerman SPU_ATTR_ACQUIRE_SAVED); 19558b3d6663SArnd Bergmann 1956197b1a82SChristoph Hellwig static int spufs_event_mask_set(void *data, u64 val) 19578b3d6663SArnd Bergmann { 19588b3d6663SArnd Bergmann struct spu_context *ctx = data; 19598b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 1960c9101bdbSChristoph Hellwig int ret; 1961c9101bdbSChristoph Hellwig 1962c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 1963c9101bdbSChristoph Hellwig if (ret) 1964c9101bdbSChristoph Hellwig return ret; 19658b3d6663SArnd Bergmann lscsa->event_mask.slot[0] = (u32) val; 196627b1ea09SChristoph Hellwig spu_release_saved(ctx); 1967197b1a82SChristoph Hellwig 1968197b1a82SChristoph Hellwig return 0; 19698b3d6663SArnd Bergmann } 19708b3d6663SArnd Bergmann 1971104f0cc2SMichael Ellerman static u64 spufs_event_mask_get(struct spu_context *ctx) 19728b3d6663SArnd Bergmann { 19738b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 1974bf1ab978SDwayne Grant McConnell return lscsa->event_mask.slot[0]; 1975bf1ab978SDwayne Grant McConnell } 1976bf1ab978SDwayne Grant McConnell 1977104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_event_mask_ops, spufs_event_mask_get, 1978104f0cc2SMichael Ellerman spufs_event_mask_set, "0x%llx\n", 1979104f0cc2SMichael Ellerman SPU_ATTR_ACQUIRE_SAVED); 19808b3d6663SArnd Bergmann 1981104f0cc2SMichael Ellerman static u64 spufs_event_status_get(struct spu_context *ctx) 1982b9e3bd77SDwayne Grant McConnell { 1983b9e3bd77SDwayne Grant McConnell struct spu_state *state = &ctx->csa; 1984b9e3bd77SDwayne Grant McConnell u64 stat; 1985b9e3bd77SDwayne Grant McConnell stat = state->spu_chnlcnt_RW[0]; 1986b9e3bd77SDwayne Grant McConnell if (stat) 1987bf1ab978SDwayne Grant McConnell return state->spu_chnldata_RW[0]; 1988bf1ab978SDwayne Grant McConnell return 0; 1989bf1ab978SDwayne Grant McConnell } 1990104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_event_status_ops, spufs_event_status_get, 1991104f0cc2SMichael Ellerman NULL, "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED) 1992b9e3bd77SDwayne Grant McConnell 1993197b1a82SChristoph Hellwig static int spufs_srr0_set(void *data, u64 val) 19948b3d6663SArnd Bergmann { 19958b3d6663SArnd Bergmann struct spu_context *ctx = data; 19968b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 1997c9101bdbSChristoph Hellwig int ret; 1998c9101bdbSChristoph Hellwig 1999c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 2000c9101bdbSChristoph Hellwig if (ret) 2001c9101bdbSChristoph Hellwig return ret; 20028b3d6663SArnd Bergmann lscsa->srr0.slot[0] = (u32) val; 200327b1ea09SChristoph Hellwig spu_release_saved(ctx); 2004197b1a82SChristoph Hellwig 2005197b1a82SChristoph Hellwig return 0; 20068b3d6663SArnd Bergmann } 20078b3d6663SArnd Bergmann 2008104f0cc2SMichael Ellerman static u64 spufs_srr0_get(struct spu_context *ctx) 20098b3d6663SArnd Bergmann { 20108b3d6663SArnd Bergmann struct spu_lscsa *lscsa = ctx->csa.lscsa; 2011104f0cc2SMichael Ellerman return lscsa->srr0.slot[0]; 20128b3d6663SArnd Bergmann } 2013104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_srr0_ops, spufs_srr0_get, spufs_srr0_set, 2014104f0cc2SMichael Ellerman "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED) 20158b3d6663SArnd Bergmann 2016104f0cc2SMichael Ellerman static u64 spufs_id_get(struct spu_context *ctx) 20177b1a7014Sarnd@arndb.de { 20187b1a7014Sarnd@arndb.de u64 num; 20197b1a7014Sarnd@arndb.de 20207b1a7014Sarnd@arndb.de if (ctx->state == SPU_STATE_RUNNABLE) 20217b1a7014Sarnd@arndb.de num = ctx->spu->number; 20227b1a7014Sarnd@arndb.de else 20237b1a7014Sarnd@arndb.de num = (unsigned int)-1; 20247b1a7014Sarnd@arndb.de 20257b1a7014Sarnd@arndb.de return num; 20267b1a7014Sarnd@arndb.de } 2027104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_id_ops, spufs_id_get, NULL, "0x%llx\n", 2028104f0cc2SMichael Ellerman SPU_ATTR_ACQUIRE) 20297b1a7014Sarnd@arndb.de 2030104f0cc2SMichael Ellerman static u64 spufs_object_id_get(struct spu_context *ctx) 2031bf1ab978SDwayne Grant McConnell { 2032bf1ab978SDwayne Grant McConnell /* FIXME: Should there really be no locking here? */ 2033104f0cc2SMichael Ellerman return ctx->object_id; 2034bf1ab978SDwayne Grant McConnell } 2035bf1ab978SDwayne Grant McConnell 2036197b1a82SChristoph Hellwig static int spufs_object_id_set(void *data, u64 id) 203786767277SArnd Bergmann { 203886767277SArnd Bergmann struct spu_context *ctx = data; 203986767277SArnd Bergmann ctx->object_id = id; 2040197b1a82SChristoph Hellwig 2041197b1a82SChristoph Hellwig return 0; 204286767277SArnd Bergmann } 204386767277SArnd Bergmann 2044104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_object_id_ops, spufs_object_id_get, 2045104f0cc2SMichael Ellerman spufs_object_id_set, "0x%llx\n", SPU_ATTR_NOACQUIRE); 204686767277SArnd Bergmann 2047104f0cc2SMichael Ellerman static u64 spufs_lslr_get(struct spu_context *ctx) 2048bf1ab978SDwayne Grant McConnell { 2049bf1ab978SDwayne Grant McConnell return ctx->csa.priv2.spu_lslr_RW; 2050bf1ab978SDwayne Grant McConnell } 2051104f0cc2SMichael Ellerman DEFINE_SPUFS_ATTRIBUTE(spufs_lslr_ops, spufs_lslr_get, NULL, "0x%llx\n", 2052104f0cc2SMichael Ellerman SPU_ATTR_ACQUIRE_SAVED); 2053b9e3bd77SDwayne Grant McConnell 2054b9e3bd77SDwayne Grant McConnell static int spufs_info_open(struct inode *inode, struct file *file) 2055b9e3bd77SDwayne Grant McConnell { 2056b9e3bd77SDwayne Grant McConnell struct spufs_inode_info *i = SPUFS_I(inode); 2057b9e3bd77SDwayne Grant McConnell struct spu_context *ctx = i->i_ctx; 2058b9e3bd77SDwayne Grant McConnell file->private_data = ctx; 2059b9e3bd77SDwayne Grant McConnell return 0; 2060b9e3bd77SDwayne Grant McConnell } 2061b9e3bd77SDwayne Grant McConnell 2062cbe709c1SBenjamin Herrenschmidt static int spufs_caps_show(struct seq_file *s, void *private) 2063cbe709c1SBenjamin Herrenschmidt { 2064cbe709c1SBenjamin Herrenschmidt struct spu_context *ctx = s->private; 2065cbe709c1SBenjamin Herrenschmidt 2066cbe709c1SBenjamin Herrenschmidt if (!(ctx->flags & SPU_CREATE_NOSCHED)) 2067cbe709c1SBenjamin Herrenschmidt seq_puts(s, "sched\n"); 2068cbe709c1SBenjamin Herrenschmidt if (!(ctx->flags & SPU_CREATE_ISOLATE)) 2069cbe709c1SBenjamin Herrenschmidt seq_puts(s, "step\n"); 2070cbe709c1SBenjamin Herrenschmidt return 0; 2071cbe709c1SBenjamin Herrenschmidt } 2072cbe709c1SBenjamin Herrenschmidt 2073cbe709c1SBenjamin Herrenschmidt static int spufs_caps_open(struct inode *inode, struct file *file) 2074cbe709c1SBenjamin Herrenschmidt { 2075cbe709c1SBenjamin Herrenschmidt return single_open(file, spufs_caps_show, SPUFS_I(inode)->i_ctx); 2076cbe709c1SBenjamin Herrenschmidt } 2077cbe709c1SBenjamin Herrenschmidt 2078cbe709c1SBenjamin Herrenschmidt static const struct file_operations spufs_caps_fops = { 2079cbe709c1SBenjamin Herrenschmidt .open = spufs_caps_open, 2080cbe709c1SBenjamin Herrenschmidt .read = seq_read, 2081cbe709c1SBenjamin Herrenschmidt .llseek = seq_lseek, 2082cbe709c1SBenjamin Herrenschmidt .release = single_release, 2083cbe709c1SBenjamin Herrenschmidt }; 2084cbe709c1SBenjamin Herrenschmidt 2085bf1ab978SDwayne Grant McConnell static ssize_t __spufs_mbox_info_read(struct spu_context *ctx, 2086bf1ab978SDwayne Grant McConnell char __user *buf, size_t len, loff_t *pos) 2087bf1ab978SDwayne Grant McConnell { 2088bf1ab978SDwayne Grant McConnell u32 data; 2089bf1ab978SDwayne Grant McConnell 2090cbea9238SJeremy Kerr /* EOF if there's no entry in the mbox */ 2091cbea9238SJeremy Kerr if (!(ctx->csa.prob.mb_stat_R & 0x0000ff)) 2092cbea9238SJeremy Kerr return 0; 2093cbea9238SJeremy Kerr 2094bf1ab978SDwayne Grant McConnell data = ctx->csa.prob.pu_mb_R; 2095bf1ab978SDwayne Grant McConnell 2096bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buf, len, pos, &data, sizeof data); 2097bf1ab978SDwayne Grant McConnell } 2098bf1ab978SDwayne Grant McConnell 209969a2f00cSDwayne Grant McConnell static ssize_t spufs_mbox_info_read(struct file *file, char __user *buf, 210069a2f00cSDwayne Grant McConnell size_t len, loff_t *pos) 210169a2f00cSDwayne Grant McConnell { 2102bf1ab978SDwayne Grant McConnell int ret; 210369a2f00cSDwayne Grant McConnell struct spu_context *ctx = file->private_data; 210469a2f00cSDwayne Grant McConnell 210569a2f00cSDwayne Grant McConnell if (!access_ok(VERIFY_WRITE, buf, len)) 210669a2f00cSDwayne Grant McConnell return -EFAULT; 210769a2f00cSDwayne Grant McConnell 2108c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 2109c9101bdbSChristoph Hellwig if (ret) 2110c9101bdbSChristoph Hellwig return ret; 211169a2f00cSDwayne Grant McConnell spin_lock(&ctx->csa.register_lock); 2112bf1ab978SDwayne Grant McConnell ret = __spufs_mbox_info_read(ctx, buf, len, pos); 211369a2f00cSDwayne Grant McConnell spin_unlock(&ctx->csa.register_lock); 211427b1ea09SChristoph Hellwig spu_release_saved(ctx); 211569a2f00cSDwayne Grant McConnell 2116bf1ab978SDwayne Grant McConnell return ret; 211769a2f00cSDwayne Grant McConnell } 211869a2f00cSDwayne Grant McConnell 21195dfe4c96SArjan van de Ven static const struct file_operations spufs_mbox_info_fops = { 212069a2f00cSDwayne Grant McConnell .open = spufs_info_open, 212169a2f00cSDwayne Grant McConnell .read = spufs_mbox_info_read, 212269a2f00cSDwayne Grant McConnell .llseek = generic_file_llseek, 212369a2f00cSDwayne Grant McConnell }; 212469a2f00cSDwayne Grant McConnell 2125bf1ab978SDwayne Grant McConnell static ssize_t __spufs_ibox_info_read(struct spu_context *ctx, 2126bf1ab978SDwayne Grant McConnell char __user *buf, size_t len, loff_t *pos) 2127bf1ab978SDwayne Grant McConnell { 2128bf1ab978SDwayne Grant McConnell u32 data; 2129bf1ab978SDwayne Grant McConnell 2130cbea9238SJeremy Kerr /* EOF if there's no entry in the ibox */ 2131cbea9238SJeremy Kerr if (!(ctx->csa.prob.mb_stat_R & 0xff0000)) 2132cbea9238SJeremy Kerr return 0; 2133cbea9238SJeremy Kerr 2134bf1ab978SDwayne Grant McConnell data = ctx->csa.priv2.puint_mb_R; 2135bf1ab978SDwayne Grant McConnell 2136bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buf, len, pos, &data, sizeof data); 2137bf1ab978SDwayne Grant McConnell } 2138bf1ab978SDwayne Grant McConnell 213969a2f00cSDwayne Grant McConnell static ssize_t spufs_ibox_info_read(struct file *file, char __user *buf, 214069a2f00cSDwayne Grant McConnell size_t len, loff_t *pos) 214169a2f00cSDwayne Grant McConnell { 214269a2f00cSDwayne Grant McConnell struct spu_context *ctx = file->private_data; 2143bf1ab978SDwayne Grant McConnell int ret; 214469a2f00cSDwayne Grant McConnell 214569a2f00cSDwayne Grant McConnell if (!access_ok(VERIFY_WRITE, buf, len)) 214669a2f00cSDwayne Grant McConnell return -EFAULT; 214769a2f00cSDwayne Grant McConnell 2148c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 2149c9101bdbSChristoph Hellwig if (ret) 2150c9101bdbSChristoph Hellwig return ret; 215169a2f00cSDwayne Grant McConnell spin_lock(&ctx->csa.register_lock); 2152bf1ab978SDwayne Grant McConnell ret = __spufs_ibox_info_read(ctx, buf, len, pos); 215369a2f00cSDwayne Grant McConnell spin_unlock(&ctx->csa.register_lock); 215427b1ea09SChristoph Hellwig spu_release_saved(ctx); 215569a2f00cSDwayne Grant McConnell 2156bf1ab978SDwayne Grant McConnell return ret; 215769a2f00cSDwayne Grant McConnell } 215869a2f00cSDwayne Grant McConnell 21595dfe4c96SArjan van de Ven static const struct file_operations spufs_ibox_info_fops = { 216069a2f00cSDwayne Grant McConnell .open = spufs_info_open, 216169a2f00cSDwayne Grant McConnell .read = spufs_ibox_info_read, 216269a2f00cSDwayne Grant McConnell .llseek = generic_file_llseek, 216369a2f00cSDwayne Grant McConnell }; 216469a2f00cSDwayne Grant McConnell 2165bf1ab978SDwayne Grant McConnell static ssize_t __spufs_wbox_info_read(struct spu_context *ctx, 2166bf1ab978SDwayne Grant McConnell char __user *buf, size_t len, loff_t *pos) 2167bf1ab978SDwayne Grant McConnell { 2168bf1ab978SDwayne Grant McConnell int i, cnt; 2169bf1ab978SDwayne Grant McConnell u32 data[4]; 2170bf1ab978SDwayne Grant McConnell u32 wbox_stat; 2171bf1ab978SDwayne Grant McConnell 2172bf1ab978SDwayne Grant McConnell wbox_stat = ctx->csa.prob.mb_stat_R; 2173bf1ab978SDwayne Grant McConnell cnt = 4 - ((wbox_stat & 0x00ff00) >> 8); 2174bf1ab978SDwayne Grant McConnell for (i = 0; i < cnt; i++) { 2175bf1ab978SDwayne Grant McConnell data[i] = ctx->csa.spu_mailbox_data[i]; 2176bf1ab978SDwayne Grant McConnell } 2177bf1ab978SDwayne Grant McConnell 2178bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buf, len, pos, &data, 2179bf1ab978SDwayne Grant McConnell cnt * sizeof(u32)); 2180bf1ab978SDwayne Grant McConnell } 2181bf1ab978SDwayne Grant McConnell 218269a2f00cSDwayne Grant McConnell static ssize_t spufs_wbox_info_read(struct file *file, char __user *buf, 218369a2f00cSDwayne Grant McConnell size_t len, loff_t *pos) 218469a2f00cSDwayne Grant McConnell { 218569a2f00cSDwayne Grant McConnell struct spu_context *ctx = file->private_data; 2186bf1ab978SDwayne Grant McConnell int ret; 218769a2f00cSDwayne Grant McConnell 218869a2f00cSDwayne Grant McConnell if (!access_ok(VERIFY_WRITE, buf, len)) 218969a2f00cSDwayne Grant McConnell return -EFAULT; 219069a2f00cSDwayne Grant McConnell 2191c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 2192c9101bdbSChristoph Hellwig if (ret) 2193c9101bdbSChristoph Hellwig return ret; 219469a2f00cSDwayne Grant McConnell spin_lock(&ctx->csa.register_lock); 2195bf1ab978SDwayne Grant McConnell ret = __spufs_wbox_info_read(ctx, buf, len, pos); 219669a2f00cSDwayne Grant McConnell spin_unlock(&ctx->csa.register_lock); 219727b1ea09SChristoph Hellwig spu_release_saved(ctx); 219869a2f00cSDwayne Grant McConnell 2199bf1ab978SDwayne Grant McConnell return ret; 220069a2f00cSDwayne Grant McConnell } 220169a2f00cSDwayne Grant McConnell 22025dfe4c96SArjan van de Ven static const struct file_operations spufs_wbox_info_fops = { 220369a2f00cSDwayne Grant McConnell .open = spufs_info_open, 220469a2f00cSDwayne Grant McConnell .read = spufs_wbox_info_read, 220569a2f00cSDwayne Grant McConnell .llseek = generic_file_llseek, 220669a2f00cSDwayne Grant McConnell }; 220769a2f00cSDwayne Grant McConnell 2208bf1ab978SDwayne Grant McConnell static ssize_t __spufs_dma_info_read(struct spu_context *ctx, 2209bf1ab978SDwayne Grant McConnell char __user *buf, size_t len, loff_t *pos) 2210b9e3bd77SDwayne Grant McConnell { 2211b9e3bd77SDwayne Grant McConnell struct spu_dma_info info; 2212b9e3bd77SDwayne Grant McConnell struct mfc_cq_sr *qp, *spuqp; 2213b9e3bd77SDwayne Grant McConnell int i; 2214b9e3bd77SDwayne Grant McConnell 2215b9e3bd77SDwayne Grant McConnell info.dma_info_type = ctx->csa.priv2.spu_tag_status_query_RW; 2216b9e3bd77SDwayne Grant McConnell info.dma_info_mask = ctx->csa.lscsa->tag_mask.slot[0]; 2217b9e3bd77SDwayne Grant McConnell info.dma_info_status = ctx->csa.spu_chnldata_RW[24]; 2218b9e3bd77SDwayne Grant McConnell info.dma_info_stall_and_notify = ctx->csa.spu_chnldata_RW[25]; 2219b9e3bd77SDwayne Grant McConnell info.dma_info_atomic_command_status = ctx->csa.spu_chnldata_RW[27]; 2220b9e3bd77SDwayne Grant McConnell for (i = 0; i < 16; i++) { 2221b9e3bd77SDwayne Grant McConnell qp = &info.dma_info_command_data[i]; 2222b9e3bd77SDwayne Grant McConnell spuqp = &ctx->csa.priv2.spuq[i]; 2223b9e3bd77SDwayne Grant McConnell 2224b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data0_RW = spuqp->mfc_cq_data0_RW; 2225b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data1_RW = spuqp->mfc_cq_data1_RW; 2226b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data2_RW = spuqp->mfc_cq_data2_RW; 2227b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data3_RW = spuqp->mfc_cq_data3_RW; 2228b9e3bd77SDwayne Grant McConnell } 2229b9e3bd77SDwayne Grant McConnell 2230b9e3bd77SDwayne Grant McConnell return simple_read_from_buffer(buf, len, pos, &info, 2231b9e3bd77SDwayne Grant McConnell sizeof info); 2232b9e3bd77SDwayne Grant McConnell } 2233b9e3bd77SDwayne Grant McConnell 2234bf1ab978SDwayne Grant McConnell static ssize_t spufs_dma_info_read(struct file *file, char __user *buf, 2235bf1ab978SDwayne Grant McConnell size_t len, loff_t *pos) 2236bf1ab978SDwayne Grant McConnell { 2237bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 2238bf1ab978SDwayne Grant McConnell int ret; 2239bf1ab978SDwayne Grant McConnell 2240bf1ab978SDwayne Grant McConnell if (!access_ok(VERIFY_WRITE, buf, len)) 2241bf1ab978SDwayne Grant McConnell return -EFAULT; 2242bf1ab978SDwayne Grant McConnell 2243c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 2244c9101bdbSChristoph Hellwig if (ret) 2245c9101bdbSChristoph Hellwig return ret; 2246bf1ab978SDwayne Grant McConnell spin_lock(&ctx->csa.register_lock); 2247bf1ab978SDwayne Grant McConnell ret = __spufs_dma_info_read(ctx, buf, len, pos); 2248bf1ab978SDwayne Grant McConnell spin_unlock(&ctx->csa.register_lock); 224927b1ea09SChristoph Hellwig spu_release_saved(ctx); 2250bf1ab978SDwayne Grant McConnell 2251bf1ab978SDwayne Grant McConnell return ret; 2252bf1ab978SDwayne Grant McConnell } 2253bf1ab978SDwayne Grant McConnell 22545dfe4c96SArjan van de Ven static const struct file_operations spufs_dma_info_fops = { 2255b9e3bd77SDwayne Grant McConnell .open = spufs_info_open, 2256b9e3bd77SDwayne Grant McConnell .read = spufs_dma_info_read, 2257fc15351dSArnd Bergmann .llseek = no_llseek, 2258b9e3bd77SDwayne Grant McConnell }; 2259b9e3bd77SDwayne Grant McConnell 2260bf1ab978SDwayne Grant McConnell static ssize_t __spufs_proxydma_info_read(struct spu_context *ctx, 2261bf1ab978SDwayne Grant McConnell char __user *buf, size_t len, loff_t *pos) 2262b9e3bd77SDwayne Grant McConnell { 2263b9e3bd77SDwayne Grant McConnell struct spu_proxydma_info info; 2264b9e3bd77SDwayne Grant McConnell struct mfc_cq_sr *qp, *puqp; 2265bf1ab978SDwayne Grant McConnell int ret = sizeof info; 2266b9e3bd77SDwayne Grant McConnell int i; 2267b9e3bd77SDwayne Grant McConnell 2268b9e3bd77SDwayne Grant McConnell if (len < ret) 2269b9e3bd77SDwayne Grant McConnell return -EINVAL; 2270b9e3bd77SDwayne Grant McConnell 2271b9e3bd77SDwayne Grant McConnell if (!access_ok(VERIFY_WRITE, buf, len)) 2272b9e3bd77SDwayne Grant McConnell return -EFAULT; 2273b9e3bd77SDwayne Grant McConnell 2274b9e3bd77SDwayne Grant McConnell info.proxydma_info_type = ctx->csa.prob.dma_querytype_RW; 2275b9e3bd77SDwayne Grant McConnell info.proxydma_info_mask = ctx->csa.prob.dma_querymask_RW; 2276b9e3bd77SDwayne Grant McConnell info.proxydma_info_status = ctx->csa.prob.dma_tagstatus_R; 2277b9e3bd77SDwayne Grant McConnell for (i = 0; i < 8; i++) { 2278b9e3bd77SDwayne Grant McConnell qp = &info.proxydma_info_command_data[i]; 2279b9e3bd77SDwayne Grant McConnell puqp = &ctx->csa.priv2.puq[i]; 2280b9e3bd77SDwayne Grant McConnell 2281b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data0_RW = puqp->mfc_cq_data0_RW; 2282b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data1_RW = puqp->mfc_cq_data1_RW; 2283b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data2_RW = puqp->mfc_cq_data2_RW; 2284b9e3bd77SDwayne Grant McConnell qp->mfc_cq_data3_RW = puqp->mfc_cq_data3_RW; 2285b9e3bd77SDwayne Grant McConnell } 2286bf1ab978SDwayne Grant McConnell 2287bf1ab978SDwayne Grant McConnell return simple_read_from_buffer(buf, len, pos, &info, 2288bf1ab978SDwayne Grant McConnell sizeof info); 2289bf1ab978SDwayne Grant McConnell } 2290bf1ab978SDwayne Grant McConnell 2291bf1ab978SDwayne Grant McConnell static ssize_t spufs_proxydma_info_read(struct file *file, char __user *buf, 2292bf1ab978SDwayne Grant McConnell size_t len, loff_t *pos) 2293bf1ab978SDwayne Grant McConnell { 2294bf1ab978SDwayne Grant McConnell struct spu_context *ctx = file->private_data; 2295bf1ab978SDwayne Grant McConnell int ret; 2296bf1ab978SDwayne Grant McConnell 2297c9101bdbSChristoph Hellwig ret = spu_acquire_saved(ctx); 2298c9101bdbSChristoph Hellwig if (ret) 2299c9101bdbSChristoph Hellwig return ret; 2300bf1ab978SDwayne Grant McConnell spin_lock(&ctx->csa.register_lock); 2301bf1ab978SDwayne Grant McConnell ret = __spufs_proxydma_info_read(ctx, buf, len, pos); 2302b9e3bd77SDwayne Grant McConnell spin_unlock(&ctx->csa.register_lock); 230327b1ea09SChristoph Hellwig spu_release_saved(ctx); 2304b9e3bd77SDwayne Grant McConnell 2305b9e3bd77SDwayne Grant McConnell return ret; 2306b9e3bd77SDwayne Grant McConnell } 2307b9e3bd77SDwayne Grant McConnell 23085dfe4c96SArjan van de Ven static const struct file_operations spufs_proxydma_info_fops = { 2309b9e3bd77SDwayne Grant McConnell .open = spufs_info_open, 2310b9e3bd77SDwayne Grant McConnell .read = spufs_proxydma_info_read, 2311fc15351dSArnd Bergmann .llseek = no_llseek, 2312b9e3bd77SDwayne Grant McConnell }; 2313b9e3bd77SDwayne Grant McConnell 2314476273adSChristoph Hellwig static int spufs_show_tid(struct seq_file *s, void *private) 2315476273adSChristoph Hellwig { 2316476273adSChristoph Hellwig struct spu_context *ctx = s->private; 2317476273adSChristoph Hellwig 2318476273adSChristoph Hellwig seq_printf(s, "%d\n", ctx->tid); 2319476273adSChristoph Hellwig return 0; 2320476273adSChristoph Hellwig } 2321476273adSChristoph Hellwig 2322476273adSChristoph Hellwig static int spufs_tid_open(struct inode *inode, struct file *file) 2323476273adSChristoph Hellwig { 2324476273adSChristoph Hellwig return single_open(file, spufs_show_tid, SPUFS_I(inode)->i_ctx); 2325476273adSChristoph Hellwig } 2326476273adSChristoph Hellwig 2327476273adSChristoph Hellwig static const struct file_operations spufs_tid_fops = { 2328476273adSChristoph Hellwig .open = spufs_tid_open, 2329476273adSChristoph Hellwig .read = seq_read, 2330476273adSChristoph Hellwig .llseek = seq_lseek, 2331476273adSChristoph Hellwig .release = single_release, 2332476273adSChristoph Hellwig }; 2333476273adSChristoph Hellwig 2334e9f8a0b6SChristoph Hellwig static const char *ctx_state_names[] = { 2335e9f8a0b6SChristoph Hellwig "user", "system", "iowait", "loaded" 2336e9f8a0b6SChristoph Hellwig }; 2337e9f8a0b6SChristoph Hellwig 2338e9f8a0b6SChristoph Hellwig static unsigned long long spufs_acct_time(struct spu_context *ctx, 233927ec41d3SAndre Detsch enum spu_utilization_state state) 2340e9f8a0b6SChristoph Hellwig { 234127ec41d3SAndre Detsch unsigned long long time = ctx->stats.times[state]; 2342e9f8a0b6SChristoph Hellwig 234327ec41d3SAndre Detsch /* 234427ec41d3SAndre Detsch * In general, utilization statistics are updated by the controlling 234527ec41d3SAndre Detsch * thread as the spu context moves through various well defined 234627ec41d3SAndre Detsch * state transitions, but if the context is lazily loaded its 234727ec41d3SAndre Detsch * utilization statistics are not updated as the controlling thread 234827ec41d3SAndre Detsch * is not tightly coupled with the execution of the spu context. We 234927ec41d3SAndre Detsch * calculate and apply the time delta from the last recorded state 235027ec41d3SAndre Detsch * of the spu context. 235127ec41d3SAndre Detsch */ 235227ec41d3SAndre Detsch if (ctx->spu && ctx->stats.util_state == state) { 2353f2dec1eaSThomas Gleixner time += ktime_get_ns() - ctx->stats.tstamp; 235427ec41d3SAndre Detsch } 2355e9f8a0b6SChristoph Hellwig 235627ec41d3SAndre Detsch return time / NSEC_PER_MSEC; 2357e9f8a0b6SChristoph Hellwig } 2358e9f8a0b6SChristoph Hellwig 2359e9f8a0b6SChristoph Hellwig static unsigned long long spufs_slb_flts(struct spu_context *ctx) 2360e9f8a0b6SChristoph Hellwig { 2361e9f8a0b6SChristoph Hellwig unsigned long long slb_flts = ctx->stats.slb_flt; 2362e9f8a0b6SChristoph Hellwig 2363e9f8a0b6SChristoph Hellwig if (ctx->state == SPU_STATE_RUNNABLE) { 2364e9f8a0b6SChristoph Hellwig slb_flts += (ctx->spu->stats.slb_flt - 2365e9f8a0b6SChristoph Hellwig ctx->stats.slb_flt_base); 2366e9f8a0b6SChristoph Hellwig } 2367e9f8a0b6SChristoph Hellwig 2368e9f8a0b6SChristoph Hellwig return slb_flts; 2369e9f8a0b6SChristoph Hellwig } 2370e9f8a0b6SChristoph Hellwig 2371e9f8a0b6SChristoph Hellwig static unsigned long long spufs_class2_intrs(struct spu_context *ctx) 2372e9f8a0b6SChristoph Hellwig { 2373e9f8a0b6SChristoph Hellwig unsigned long long class2_intrs = ctx->stats.class2_intr; 2374e9f8a0b6SChristoph Hellwig 2375e9f8a0b6SChristoph Hellwig if (ctx->state == SPU_STATE_RUNNABLE) { 2376e9f8a0b6SChristoph Hellwig class2_intrs += (ctx->spu->stats.class2_intr - 2377e9f8a0b6SChristoph Hellwig ctx->stats.class2_intr_base); 2378e9f8a0b6SChristoph Hellwig } 2379e9f8a0b6SChristoph Hellwig 2380e9f8a0b6SChristoph Hellwig return class2_intrs; 2381e9f8a0b6SChristoph Hellwig } 2382e9f8a0b6SChristoph Hellwig 2383e9f8a0b6SChristoph Hellwig 2384e9f8a0b6SChristoph Hellwig static int spufs_show_stat(struct seq_file *s, void *private) 2385e9f8a0b6SChristoph Hellwig { 2386e9f8a0b6SChristoph Hellwig struct spu_context *ctx = s->private; 2387c9101bdbSChristoph Hellwig int ret; 2388e9f8a0b6SChristoph Hellwig 2389c9101bdbSChristoph Hellwig ret = spu_acquire(ctx); 2390c9101bdbSChristoph Hellwig if (ret) 2391c9101bdbSChristoph Hellwig return ret; 2392c9101bdbSChristoph Hellwig 2393e9f8a0b6SChristoph Hellwig seq_printf(s, "%s %llu %llu %llu %llu " 2394e9f8a0b6SChristoph Hellwig "%llu %llu %llu %llu %llu %llu %llu %llu\n", 239527ec41d3SAndre Detsch ctx_state_names[ctx->stats.util_state], 239627ec41d3SAndre Detsch spufs_acct_time(ctx, SPU_UTIL_USER), 239727ec41d3SAndre Detsch spufs_acct_time(ctx, SPU_UTIL_SYSTEM), 239827ec41d3SAndre Detsch spufs_acct_time(ctx, SPU_UTIL_IOWAIT), 239927ec41d3SAndre Detsch spufs_acct_time(ctx, SPU_UTIL_IDLE_LOADED), 2400e9f8a0b6SChristoph Hellwig ctx->stats.vol_ctx_switch, 2401e9f8a0b6SChristoph Hellwig ctx->stats.invol_ctx_switch, 2402e9f8a0b6SChristoph Hellwig spufs_slb_flts(ctx), 2403e9f8a0b6SChristoph Hellwig ctx->stats.hash_flt, 2404e9f8a0b6SChristoph Hellwig ctx->stats.min_flt, 2405e9f8a0b6SChristoph Hellwig ctx->stats.maj_flt, 2406e9f8a0b6SChristoph Hellwig spufs_class2_intrs(ctx), 2407e9f8a0b6SChristoph Hellwig ctx->stats.libassist); 2408e9f8a0b6SChristoph Hellwig spu_release(ctx); 2409e9f8a0b6SChristoph Hellwig return 0; 2410e9f8a0b6SChristoph Hellwig } 2411e9f8a0b6SChristoph Hellwig 2412e9f8a0b6SChristoph Hellwig static int spufs_stat_open(struct inode *inode, struct file *file) 2413e9f8a0b6SChristoph Hellwig { 2414e9f8a0b6SChristoph Hellwig return single_open(file, spufs_show_stat, SPUFS_I(inode)->i_ctx); 2415e9f8a0b6SChristoph Hellwig } 2416e9f8a0b6SChristoph Hellwig 2417e9f8a0b6SChristoph Hellwig static const struct file_operations spufs_stat_fops = { 2418e9f8a0b6SChristoph Hellwig .open = spufs_stat_open, 2419e9f8a0b6SChristoph Hellwig .read = seq_read, 2420e9f8a0b6SChristoph Hellwig .llseek = seq_lseek, 2421e9f8a0b6SChristoph Hellwig .release = single_release, 2422e9f8a0b6SChristoph Hellwig }; 2423e9f8a0b6SChristoph Hellwig 24245158e9b5SChristoph Hellwig static inline int spufs_switch_log_used(struct spu_context *ctx) 24255158e9b5SChristoph Hellwig { 24265158e9b5SChristoph Hellwig return (ctx->switch_log->head - ctx->switch_log->tail) % 24275158e9b5SChristoph Hellwig SWITCH_LOG_BUFSIZE; 24285158e9b5SChristoph Hellwig } 24295158e9b5SChristoph Hellwig 24305158e9b5SChristoph Hellwig static inline int spufs_switch_log_avail(struct spu_context *ctx) 24315158e9b5SChristoph Hellwig { 24325158e9b5SChristoph Hellwig return SWITCH_LOG_BUFSIZE - spufs_switch_log_used(ctx); 24335158e9b5SChristoph Hellwig } 24345158e9b5SChristoph Hellwig 24355158e9b5SChristoph Hellwig static int spufs_switch_log_open(struct inode *inode, struct file *file) 24365158e9b5SChristoph Hellwig { 24375158e9b5SChristoph Hellwig struct spu_context *ctx = SPUFS_I(inode)->i_ctx; 2438f5ed0eb6SJeremy Kerr int rc; 24395158e9b5SChristoph Hellwig 2440f5ed0eb6SJeremy Kerr rc = spu_acquire(ctx); 2441f5ed0eb6SJeremy Kerr if (rc) 2442f5ed0eb6SJeremy Kerr return rc; 2443f5ed0eb6SJeremy Kerr 24445158e9b5SChristoph Hellwig if (ctx->switch_log) { 2445f5ed0eb6SJeremy Kerr rc = -EBUSY; 2446f5ed0eb6SJeremy Kerr goto out; 2447f5ed0eb6SJeremy Kerr } 2448f5ed0eb6SJeremy Kerr 2449837ef884SJeremy Kerr ctx->switch_log = kmalloc(sizeof(struct switch_log) + 24505158e9b5SChristoph Hellwig SWITCH_LOG_BUFSIZE * sizeof(struct switch_log_entry), 24515158e9b5SChristoph Hellwig GFP_KERNEL); 2452f5ed0eb6SJeremy Kerr 2453f5ed0eb6SJeremy Kerr if (!ctx->switch_log) { 2454f5ed0eb6SJeremy Kerr rc = -ENOMEM; 24555158e9b5SChristoph Hellwig goto out; 24565158e9b5SChristoph Hellwig } 2457f5ed0eb6SJeremy Kerr 2458837ef884SJeremy Kerr ctx->switch_log->head = ctx->switch_log->tail = 0; 2459f5ed0eb6SJeremy Kerr init_waitqueue_head(&ctx->switch_log->wait); 2460f5ed0eb6SJeremy Kerr rc = 0; 2461f5ed0eb6SJeremy Kerr 2462f5ed0eb6SJeremy Kerr out: 2463f5ed0eb6SJeremy Kerr spu_release(ctx); 2464f5ed0eb6SJeremy Kerr return rc; 2465f5ed0eb6SJeremy Kerr } 2466f5ed0eb6SJeremy Kerr 2467f5ed0eb6SJeremy Kerr static int spufs_switch_log_release(struct inode *inode, struct file *file) 2468f5ed0eb6SJeremy Kerr { 2469f5ed0eb6SJeremy Kerr struct spu_context *ctx = SPUFS_I(inode)->i_ctx; 2470f5ed0eb6SJeremy Kerr int rc; 2471f5ed0eb6SJeremy Kerr 2472f5ed0eb6SJeremy Kerr rc = spu_acquire(ctx); 2473f5ed0eb6SJeremy Kerr if (rc) 2474f5ed0eb6SJeremy Kerr return rc; 2475f5ed0eb6SJeremy Kerr 2476f5ed0eb6SJeremy Kerr kfree(ctx->switch_log); 2477f5ed0eb6SJeremy Kerr ctx->switch_log = NULL; 2478f5ed0eb6SJeremy Kerr spu_release(ctx); 24795158e9b5SChristoph Hellwig 24805158e9b5SChristoph Hellwig return 0; 24815158e9b5SChristoph Hellwig } 24825158e9b5SChristoph Hellwig 24835158e9b5SChristoph Hellwig static int switch_log_sprint(struct spu_context *ctx, char *tbuf, int n) 24845158e9b5SChristoph Hellwig { 24855158e9b5SChristoph Hellwig struct switch_log_entry *p; 24865158e9b5SChristoph Hellwig 24875158e9b5SChristoph Hellwig p = ctx->switch_log->log + ctx->switch_log->tail % SWITCH_LOG_BUFSIZE; 24885158e9b5SChristoph Hellwig 24895158e9b5SChristoph Hellwig return snprintf(tbuf, n, "%u.%09u %d %u %u %llu\n", 24905158e9b5SChristoph Hellwig (unsigned int) p->tstamp.tv_sec, 24915158e9b5SChristoph Hellwig (unsigned int) p->tstamp.tv_nsec, 24925158e9b5SChristoph Hellwig p->spu_id, 24935158e9b5SChristoph Hellwig (unsigned int) p->type, 24945158e9b5SChristoph Hellwig (unsigned int) p->val, 24955158e9b5SChristoph Hellwig (unsigned long long) p->timebase); 24965158e9b5SChristoph Hellwig } 24975158e9b5SChristoph Hellwig 24985158e9b5SChristoph Hellwig static ssize_t spufs_switch_log_read(struct file *file, char __user *buf, 24995158e9b5SChristoph Hellwig size_t len, loff_t *ppos) 25005158e9b5SChristoph Hellwig { 2501496ad9aaSAl Viro struct inode *inode = file_inode(file); 25025158e9b5SChristoph Hellwig struct spu_context *ctx = SPUFS_I(inode)->i_ctx; 25035158e9b5SChristoph Hellwig int error = 0, cnt = 0; 25045158e9b5SChristoph Hellwig 250517e37675Sroel kluin if (!buf) 25065158e9b5SChristoph Hellwig return -EINVAL; 25075158e9b5SChristoph Hellwig 2508f5ed0eb6SJeremy Kerr error = spu_acquire(ctx); 2509f5ed0eb6SJeremy Kerr if (error) 2510f5ed0eb6SJeremy Kerr return error; 2511f5ed0eb6SJeremy Kerr 25125158e9b5SChristoph Hellwig while (cnt < len) { 25135158e9b5SChristoph Hellwig char tbuf[128]; 25145158e9b5SChristoph Hellwig int width; 25155158e9b5SChristoph Hellwig 2516f5ed0eb6SJeremy Kerr if (spufs_switch_log_used(ctx) == 0) { 251714f693eeSJeremy Kerr if (cnt > 0) { 251814f693eeSJeremy Kerr /* If there's data ready to go, we can 251914f693eeSJeremy Kerr * just return straight away */ 252014f693eeSJeremy Kerr break; 252114f693eeSJeremy Kerr 252214f693eeSJeremy Kerr } else if (file->f_flags & O_NONBLOCK) { 2523f5ed0eb6SJeremy Kerr error = -EAGAIN; 25245158e9b5SChristoph Hellwig break; 252514f693eeSJeremy Kerr 2526f5ed0eb6SJeremy Kerr } else { 252714f693eeSJeremy Kerr /* spufs_wait will drop the mutex and 252814f693eeSJeremy Kerr * re-acquire, but since we're in read(), the 252914f693eeSJeremy Kerr * file cannot be _released (and so 253014f693eeSJeremy Kerr * ctx->switch_log is stable). 2531f5ed0eb6SJeremy Kerr */ 2532f5ed0eb6SJeremy Kerr error = spufs_wait(ctx->switch_log->wait, 2533f5ed0eb6SJeremy Kerr spufs_switch_log_used(ctx) > 0); 25345158e9b5SChristoph Hellwig 2535f5ed0eb6SJeremy Kerr /* On error, spufs_wait returns without the 2536f5ed0eb6SJeremy Kerr * state mutex held */ 2537f5ed0eb6SJeremy Kerr if (error) 2538f5ed0eb6SJeremy Kerr return error; 25395158e9b5SChristoph Hellwig 254014f693eeSJeremy Kerr /* We may have had entries read from underneath 254114f693eeSJeremy Kerr * us while we dropped the mutex in spufs_wait, 254214f693eeSJeremy Kerr * so re-check */ 254314f693eeSJeremy Kerr if (spufs_switch_log_used(ctx) == 0) 2544f5ed0eb6SJeremy Kerr continue; 254514f693eeSJeremy Kerr } 254614f693eeSJeremy Kerr } 2547f5ed0eb6SJeremy Kerr 25485158e9b5SChristoph Hellwig width = switch_log_sprint(ctx, tbuf, sizeof(tbuf)); 2549f5ed0eb6SJeremy Kerr if (width < len) 25505158e9b5SChristoph Hellwig ctx->switch_log->tail = 25515158e9b5SChristoph Hellwig (ctx->switch_log->tail + 1) % 25525158e9b5SChristoph Hellwig SWITCH_LOG_BUFSIZE; 2553f5ed0eb6SJeremy Kerr else 2554f5ed0eb6SJeremy Kerr /* If the record is greater than space available return 2555f5ed0eb6SJeremy Kerr * partial buffer (so far) */ 25565158e9b5SChristoph Hellwig break; 25575158e9b5SChristoph Hellwig 25585158e9b5SChristoph Hellwig error = copy_to_user(buf + cnt, tbuf, width); 25595158e9b5SChristoph Hellwig if (error) 25605158e9b5SChristoph Hellwig break; 25615158e9b5SChristoph Hellwig cnt += width; 25625158e9b5SChristoph Hellwig } 25635158e9b5SChristoph Hellwig 2564f5ed0eb6SJeremy Kerr spu_release(ctx); 2565f5ed0eb6SJeremy Kerr 25665158e9b5SChristoph Hellwig return cnt == 0 ? error : cnt; 25675158e9b5SChristoph Hellwig } 25685158e9b5SChristoph Hellwig 25695158e9b5SChristoph Hellwig static unsigned int spufs_switch_log_poll(struct file *file, poll_table *wait) 25705158e9b5SChristoph Hellwig { 2571496ad9aaSAl Viro struct inode *inode = file_inode(file); 25725158e9b5SChristoph Hellwig struct spu_context *ctx = SPUFS_I(inode)->i_ctx; 25735158e9b5SChristoph Hellwig unsigned int mask = 0; 2574f5ed0eb6SJeremy Kerr int rc; 25755158e9b5SChristoph Hellwig 25765158e9b5SChristoph Hellwig poll_wait(file, &ctx->switch_log->wait, wait); 25775158e9b5SChristoph Hellwig 2578f5ed0eb6SJeremy Kerr rc = spu_acquire(ctx); 2579f5ed0eb6SJeremy Kerr if (rc) 2580f5ed0eb6SJeremy Kerr return rc; 2581f5ed0eb6SJeremy Kerr 25825158e9b5SChristoph Hellwig if (spufs_switch_log_used(ctx) > 0) 25835158e9b5SChristoph Hellwig mask |= POLLIN; 25845158e9b5SChristoph Hellwig 2585f5ed0eb6SJeremy Kerr spu_release(ctx); 2586f5ed0eb6SJeremy Kerr 25875158e9b5SChristoph Hellwig return mask; 25885158e9b5SChristoph Hellwig } 25895158e9b5SChristoph Hellwig 25905158e9b5SChristoph Hellwig static const struct file_operations spufs_switch_log_fops = { 25915158e9b5SChristoph Hellwig .open = spufs_switch_log_open, 25925158e9b5SChristoph Hellwig .read = spufs_switch_log_read, 25935158e9b5SChristoph Hellwig .poll = spufs_switch_log_poll, 2594f5ed0eb6SJeremy Kerr .release = spufs_switch_log_release, 2595fc15351dSArnd Bergmann .llseek = no_llseek, 25965158e9b5SChristoph Hellwig }; 25975158e9b5SChristoph Hellwig 2598f5ed0eb6SJeremy Kerr /** 2599f5ed0eb6SJeremy Kerr * Log a context switch event to a switch log reader. 2600f5ed0eb6SJeremy Kerr * 2601f5ed0eb6SJeremy Kerr * Must be called with ctx->state_mutex held. 2602f5ed0eb6SJeremy Kerr */ 26035158e9b5SChristoph Hellwig void spu_switch_log_notify(struct spu *spu, struct spu_context *ctx, 26045158e9b5SChristoph Hellwig u32 type, u32 val) 26055158e9b5SChristoph Hellwig { 26065158e9b5SChristoph Hellwig if (!ctx->switch_log) 26075158e9b5SChristoph Hellwig return; 26085158e9b5SChristoph Hellwig 26095158e9b5SChristoph Hellwig if (spufs_switch_log_avail(ctx) > 1) { 26105158e9b5SChristoph Hellwig struct switch_log_entry *p; 26115158e9b5SChristoph Hellwig 26125158e9b5SChristoph Hellwig p = ctx->switch_log->log + ctx->switch_log->head; 26135158e9b5SChristoph Hellwig ktime_get_ts(&p->tstamp); 26145158e9b5SChristoph Hellwig p->timebase = get_tb(); 26155158e9b5SChristoph Hellwig p->spu_id = spu ? spu->number : -1; 26165158e9b5SChristoph Hellwig p->type = type; 26175158e9b5SChristoph Hellwig p->val = val; 26185158e9b5SChristoph Hellwig 26195158e9b5SChristoph Hellwig ctx->switch_log->head = 26205158e9b5SChristoph Hellwig (ctx->switch_log->head + 1) % SWITCH_LOG_BUFSIZE; 26215158e9b5SChristoph Hellwig } 26225158e9b5SChristoph Hellwig 26235158e9b5SChristoph Hellwig wake_up(&ctx->switch_log->wait); 26245158e9b5SChristoph Hellwig } 2625e9f8a0b6SChristoph Hellwig 262646deed69SLuke Browning static int spufs_show_ctx(struct seq_file *s, void *private) 262746deed69SLuke Browning { 262846deed69SLuke Browning struct spu_context *ctx = s->private; 262946deed69SLuke Browning u64 mfc_control_RW; 263046deed69SLuke Browning 263146deed69SLuke Browning mutex_lock(&ctx->state_mutex); 263246deed69SLuke Browning if (ctx->spu) { 263346deed69SLuke Browning struct spu *spu = ctx->spu; 263446deed69SLuke Browning struct spu_priv2 __iomem *priv2 = spu->priv2; 263546deed69SLuke Browning 263646deed69SLuke Browning spin_lock_irq(&spu->register_lock); 263746deed69SLuke Browning mfc_control_RW = in_be64(&priv2->mfc_control_RW); 263846deed69SLuke Browning spin_unlock_irq(&spu->register_lock); 263946deed69SLuke Browning } else { 264046deed69SLuke Browning struct spu_state *csa = &ctx->csa; 264146deed69SLuke Browning 264246deed69SLuke Browning mfc_control_RW = csa->priv2.mfc_control_RW; 264346deed69SLuke Browning } 264446deed69SLuke Browning 264546deed69SLuke Browning seq_printf(s, "%c flgs(%lx) sflgs(%lx) pri(%d) ts(%d) spu(%02d)" 26469477e455SStephen Rothwell " %c %llx %llx %llx %llx %x %x\n", 264746deed69SLuke Browning ctx->state == SPU_STATE_SAVED ? 'S' : 'R', 264846deed69SLuke Browning ctx->flags, 264946deed69SLuke Browning ctx->sched_flags, 265046deed69SLuke Browning ctx->prio, 265146deed69SLuke Browning ctx->time_slice, 265246deed69SLuke Browning ctx->spu ? ctx->spu->number : -1, 265346deed69SLuke Browning !list_empty(&ctx->rq) ? 'q' : ' ', 265446deed69SLuke Browning ctx->csa.class_0_pending, 265546deed69SLuke Browning ctx->csa.class_0_dar, 265646deed69SLuke Browning ctx->csa.class_1_dsisr, 265746deed69SLuke Browning mfc_control_RW, 265846deed69SLuke Browning ctx->ops->runcntl_read(ctx), 265946deed69SLuke Browning ctx->ops->status_read(ctx)); 266046deed69SLuke Browning 266146deed69SLuke Browning mutex_unlock(&ctx->state_mutex); 266246deed69SLuke Browning 266346deed69SLuke Browning return 0; 266446deed69SLuke Browning } 266546deed69SLuke Browning 266646deed69SLuke Browning static int spufs_ctx_open(struct inode *inode, struct file *file) 266746deed69SLuke Browning { 266846deed69SLuke Browning return single_open(file, spufs_show_ctx, SPUFS_I(inode)->i_ctx); 266946deed69SLuke Browning } 267046deed69SLuke Browning 267146deed69SLuke Browning static const struct file_operations spufs_ctx_fops = { 267246deed69SLuke Browning .open = spufs_ctx_open, 267346deed69SLuke Browning .read = seq_read, 267446deed69SLuke Browning .llseek = seq_lseek, 267546deed69SLuke Browning .release = single_release, 267646deed69SLuke Browning }; 267746deed69SLuke Browning 267874254647SJeremy Kerr const struct spufs_tree_descr spufs_dir_contents[] = { 2679cbe709c1SBenjamin Herrenschmidt { "capabilities", &spufs_caps_fops, 0444, }, 26806f7dde81SJeremy Kerr { "mem", &spufs_mem_fops, 0666, LS_SIZE, }, 26816f7dde81SJeremy Kerr { "regs", &spufs_regs_fops, 0666, sizeof(struct spu_reg128[128]), }, 268267207b96SArnd Bergmann { "mbox", &spufs_mbox_fops, 0444, }, 268367207b96SArnd Bergmann { "ibox", &spufs_ibox_fops, 0444, }, 268467207b96SArnd Bergmann { "wbox", &spufs_wbox_fops, 0222, }, 26856f7dde81SJeremy Kerr { "mbox_stat", &spufs_mbox_stat_fops, 0444, sizeof(u32), }, 26866f7dde81SJeremy Kerr { "ibox_stat", &spufs_ibox_stat_fops, 0444, sizeof(u32), }, 26876f7dde81SJeremy Kerr { "wbox_stat", &spufs_wbox_stat_fops, 0444, sizeof(u32), }, 2688603c4612SJeremy Kerr { "signal1", &spufs_signal1_fops, 0666, }, 2689603c4612SJeremy Kerr { "signal2", &spufs_signal2_fops, 0666, }, 269067207b96SArnd Bergmann { "signal1_type", &spufs_signal1_type, 0666, }, 269167207b96SArnd Bergmann { "signal2_type", &spufs_signal2_type, 0666, }, 26926df10a82SMark Nutter { "cntl", &spufs_cntl_fops, 0666, }, 26936f7dde81SJeremy Kerr { "fpcr", &spufs_fpcr_fops, 0666, sizeof(struct spu_reg128), }, 2694b9e3bd77SDwayne Grant McConnell { "lslr", &spufs_lslr_ops, 0444, }, 2695b9e3bd77SDwayne Grant McConnell { "mfc", &spufs_mfc_fops, 0666, }, 2696b9e3bd77SDwayne Grant McConnell { "mss", &spufs_mss_fops, 0666, }, 2697b9e3bd77SDwayne Grant McConnell { "npc", &spufs_npc_ops, 0666, }, 2698b9e3bd77SDwayne Grant McConnell { "srr0", &spufs_srr0_ops, 0666, }, 26998b3d6663SArnd Bergmann { "decr", &spufs_decr_ops, 0666, }, 27008b3d6663SArnd Bergmann { "decr_status", &spufs_decr_status_ops, 0666, }, 27018b3d6663SArnd Bergmann { "event_mask", &spufs_event_mask_ops, 0666, }, 2702b9e3bd77SDwayne Grant McConnell { "event_status", &spufs_event_status_ops, 0444, }, 27036f7dde81SJeremy Kerr { "psmap", &spufs_psmap_fops, 0666, SPUFS_PS_MAP_SIZE, }, 270486767277SArnd Bergmann { "phys-id", &spufs_id_ops, 0666, }, 270586767277SArnd Bergmann { "object-id", &spufs_object_id_ops, 0666, }, 27066f7dde81SJeremy Kerr { "mbox_info", &spufs_mbox_info_fops, 0444, sizeof(u32), }, 27076f7dde81SJeremy Kerr { "ibox_info", &spufs_ibox_info_fops, 0444, sizeof(u32), }, 27086f7dde81SJeremy Kerr { "wbox_info", &spufs_wbox_info_fops, 0444, sizeof(u32), }, 27096f7dde81SJeremy Kerr { "dma_info", &spufs_dma_info_fops, 0444, 27106f7dde81SJeremy Kerr sizeof(struct spu_dma_info), }, 27116f7dde81SJeremy Kerr { "proxydma_info", &spufs_proxydma_info_fops, 0444, 27126f7dde81SJeremy Kerr sizeof(struct spu_proxydma_info)}, 2713476273adSChristoph Hellwig { "tid", &spufs_tid_fops, 0444, }, 2714e9f8a0b6SChristoph Hellwig { "stat", &spufs_stat_fops, 0444, }, 27155158e9b5SChristoph Hellwig { "switch_log", &spufs_switch_log_fops, 0444 }, 271667207b96SArnd Bergmann {}, 271767207b96SArnd Bergmann }; 27185737edd1SMark Nutter 271974254647SJeremy Kerr const struct spufs_tree_descr spufs_dir_nosched_contents[] = { 2720cbe709c1SBenjamin Herrenschmidt { "capabilities", &spufs_caps_fops, 0444, }, 27216f7dde81SJeremy Kerr { "mem", &spufs_mem_fops, 0666, LS_SIZE, }, 27225737edd1SMark Nutter { "mbox", &spufs_mbox_fops, 0444, }, 27235737edd1SMark Nutter { "ibox", &spufs_ibox_fops, 0444, }, 27245737edd1SMark Nutter { "wbox", &spufs_wbox_fops, 0222, }, 27256f7dde81SJeremy Kerr { "mbox_stat", &spufs_mbox_stat_fops, 0444, sizeof(u32), }, 27266f7dde81SJeremy Kerr { "ibox_stat", &spufs_ibox_stat_fops, 0444, sizeof(u32), }, 27276f7dde81SJeremy Kerr { "wbox_stat", &spufs_wbox_stat_fops, 0444, sizeof(u32), }, 2728d054b36fSJeremy Kerr { "signal1", &spufs_signal1_nosched_fops, 0222, }, 2729d054b36fSJeremy Kerr { "signal2", &spufs_signal2_nosched_fops, 0222, }, 27305737edd1SMark Nutter { "signal1_type", &spufs_signal1_type, 0666, }, 27315737edd1SMark Nutter { "signal2_type", &spufs_signal2_type, 0666, }, 27325737edd1SMark Nutter { "mss", &spufs_mss_fops, 0666, }, 27335737edd1SMark Nutter { "mfc", &spufs_mfc_fops, 0666, }, 27345737edd1SMark Nutter { "cntl", &spufs_cntl_fops, 0666, }, 27355737edd1SMark Nutter { "npc", &spufs_npc_ops, 0666, }, 27366f7dde81SJeremy Kerr { "psmap", &spufs_psmap_fops, 0666, SPUFS_PS_MAP_SIZE, }, 27375737edd1SMark Nutter { "phys-id", &spufs_id_ops, 0666, }, 27385737edd1SMark Nutter { "object-id", &spufs_object_id_ops, 0666, }, 2739476273adSChristoph Hellwig { "tid", &spufs_tid_fops, 0444, }, 2740e9f8a0b6SChristoph Hellwig { "stat", &spufs_stat_fops, 0444, }, 27412c3e4787SJeremy Kerr {}, 27422c3e4787SJeremy Kerr }; 27432c3e4787SJeremy Kerr 274474254647SJeremy Kerr const struct spufs_tree_descr spufs_dir_debug_contents[] = { 274546deed69SLuke Browning { ".ctx", &spufs_ctx_fops, 0444, }, 27465737edd1SMark Nutter {}, 27475737edd1SMark Nutter }; 2748bf1ab978SDwayne Grant McConnell 274974254647SJeremy Kerr const struct spufs_coredump_reader spufs_coredump_read[] = { 27504fca9c42SMichael Ellerman { "regs", __spufs_regs_read, NULL, sizeof(struct spu_reg128[128])}, 27514fca9c42SMichael Ellerman { "fpcr", __spufs_fpcr_read, NULL, sizeof(struct spu_reg128) }, 2752104f0cc2SMichael Ellerman { "lslr", NULL, spufs_lslr_get, 19 }, 2753104f0cc2SMichael Ellerman { "decr", NULL, spufs_decr_get, 19 }, 2754104f0cc2SMichael Ellerman { "decr_status", NULL, spufs_decr_status_get, 19 }, 27554fca9c42SMichael Ellerman { "mem", __spufs_mem_read, NULL, LS_SIZE, }, 27564fca9c42SMichael Ellerman { "signal1", __spufs_signal1_read, NULL, sizeof(u32) }, 2757104f0cc2SMichael Ellerman { "signal1_type", NULL, spufs_signal1_type_get, 19 }, 27584fca9c42SMichael Ellerman { "signal2", __spufs_signal2_read, NULL, sizeof(u32) }, 2759104f0cc2SMichael Ellerman { "signal2_type", NULL, spufs_signal2_type_get, 19 }, 2760104f0cc2SMichael Ellerman { "event_mask", NULL, spufs_event_mask_get, 19 }, 2761104f0cc2SMichael Ellerman { "event_status", NULL, spufs_event_status_get, 19 }, 27624fca9c42SMichael Ellerman { "mbox_info", __spufs_mbox_info_read, NULL, sizeof(u32) }, 27634fca9c42SMichael Ellerman { "ibox_info", __spufs_ibox_info_read, NULL, sizeof(u32) }, 27644fca9c42SMichael Ellerman { "wbox_info", __spufs_wbox_info_read, NULL, 4 * sizeof(u32)}, 27654fca9c42SMichael Ellerman { "dma_info", __spufs_dma_info_read, NULL, sizeof(struct spu_dma_info)}, 27664fca9c42SMichael Ellerman { "proxydma_info", __spufs_proxydma_info_read, 27674fca9c42SMichael Ellerman NULL, sizeof(struct spu_proxydma_info)}, 2768104f0cc2SMichael Ellerman { "object-id", NULL, spufs_object_id_get, 19 }, 2769104f0cc2SMichael Ellerman { "npc", NULL, spufs_npc_get, 19 }, 2770936d5bf1SMichael Ellerman { NULL }, 2771bf1ab978SDwayne Grant McConnell }; 2772