![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
643 lines
15 KiB
C
643 lines
15 KiB
C
/* arch/arm/mach-msm/qdsp5/adsp_driver.c
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*
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* Copyright (C) 2008 Google, Inc.
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* Author: Iliyan Malchev <ibm@android.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/cdev.h>
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#include <linux/fs.h>
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#include <linux/list.h>
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#include <linux/platform_device.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include "adsp.h"
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#include <linux/msm_adsp.h>
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#include <linux/android_pmem.h>
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struct adsp_pmem_region {
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struct hlist_node list;
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void *vaddr;
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unsigned long paddr;
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unsigned long kvaddr;
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unsigned long len;
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struct file *file;
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};
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struct adsp_device {
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struct msm_adsp_module *module;
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spinlock_t event_queue_lock;
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wait_queue_head_t event_wait;
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struct list_head event_queue;
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int abort;
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const char *name;
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struct device *device;
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struct cdev cdev;
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};
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static struct adsp_device *inode_to_device(struct inode *inode);
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#define __CONTAINS(r, v, l) ({ \
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typeof(r) __r = r; \
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typeof(v) __v = v; \
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typeof(v) __e = __v + l; \
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int res = __v >= __r->vaddr && \
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__e <= __r->vaddr + __r->len; \
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res; \
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})
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#define CONTAINS(r1, r2) ({ \
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typeof(r2) __r2 = r2; \
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__CONTAINS(r1, __r2->vaddr, __r2->len); \
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})
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#define IN_RANGE(r, v) ({ \
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typeof(r) __r = r; \
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typeof(v) __vv = v; \
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int res = ((__vv >= __r->vaddr) && \
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(__vv < (__r->vaddr + __r->len))); \
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res; \
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})
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#define OVERLAPS(r1, r2) ({ \
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typeof(r1) __r1 = r1; \
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typeof(r2) __r2 = r2; \
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typeof(__r2->vaddr) __v = __r2->vaddr; \
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typeof(__v) __e = __v + __r2->len - 1; \
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int res = (IN_RANGE(__r1, __v) || IN_RANGE(__r1, __e)); \
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res; \
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})
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static int adsp_pmem_check(struct msm_adsp_module *module,
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void *vaddr, unsigned long len)
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{
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struct adsp_pmem_region *region_elt;
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struct hlist_node *node;
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struct adsp_pmem_region t = { .vaddr = vaddr, .len = len };
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hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) {
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if (CONTAINS(region_elt, &t) || CONTAINS(&t, region_elt) ||
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OVERLAPS(region_elt, &t)) {
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printk(KERN_ERR "adsp: module %s:"
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" region (vaddr %p len %ld)"
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" clashes with registered region"
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" (vaddr %p paddr %p len %ld)\n",
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module->name,
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vaddr, len,
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region_elt->vaddr,
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(void *)region_elt->paddr,
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region_elt->len);
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return -EINVAL;
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}
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}
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return 0;
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}
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static int adsp_pmem_add(struct msm_adsp_module *module,
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struct adsp_pmem_info *info)
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{
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unsigned long paddr, kvaddr, len;
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struct file *file;
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struct adsp_pmem_region *region;
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int rc = -EINVAL;
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mutex_lock(&module->pmem_regions_lock);
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region = kmalloc(sizeof(*region), GFP_KERNEL);
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if (!region) {
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rc = -ENOMEM;
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goto end;
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}
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INIT_HLIST_NODE(®ion->list);
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if (get_pmem_file(info->fd, &paddr, &kvaddr, &len, &file)) {
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kfree(region);
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goto end;
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}
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rc = adsp_pmem_check(module, info->vaddr, len);
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if (rc < 0) {
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put_pmem_file(file);
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kfree(region);
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goto end;
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}
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region->vaddr = info->vaddr;
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region->paddr = paddr;
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region->kvaddr = kvaddr;
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region->len = len;
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region->file = file;
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hlist_add_head(®ion->list, &module->pmem_regions);
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end:
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mutex_unlock(&module->pmem_regions_lock);
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return rc;
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}
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static int adsp_pmem_lookup_vaddr(struct msm_adsp_module *module, void **addr,
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unsigned long len, struct adsp_pmem_region **region)
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{
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struct hlist_node *node;
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void *vaddr = *addr;
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struct adsp_pmem_region *region_elt;
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int match_count = 0;
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*region = NULL;
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/* returns physical address or zero */
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hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) {
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if (vaddr >= region_elt->vaddr &&
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vaddr < region_elt->vaddr + region_elt->len &&
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vaddr + len <= region_elt->vaddr + region_elt->len) {
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/* offset since we could pass vaddr inside a registerd
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* pmem buffer
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*/
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match_count++;
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if (!*region)
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*region = region_elt;
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}
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}
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if (match_count > 1) {
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printk(KERN_ERR "adsp: module %s: "
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"multiple hits for vaddr %p, len %ld\n",
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module->name, vaddr, len);
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hlist_for_each_entry(region_elt, node,
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&module->pmem_regions, list) {
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if (vaddr >= region_elt->vaddr &&
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vaddr < region_elt->vaddr + region_elt->len &&
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vaddr + len <= region_elt->vaddr + region_elt->len)
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printk(KERN_ERR "\t%p, %ld --> %p\n",
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region_elt->vaddr,
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region_elt->len,
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(void *)region_elt->paddr);
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}
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}
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return *region ? 0 : -1;
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}
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int adsp_pmem_fixup_kvaddr(struct msm_adsp_module *module, void **addr,
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unsigned long *kvaddr, unsigned long len)
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{
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struct adsp_pmem_region *region;
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void *vaddr = *addr;
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unsigned long *paddr = (unsigned long *)addr;
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int ret;
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ret = adsp_pmem_lookup_vaddr(module, addr, len, ®ion);
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if (ret) {
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printk(KERN_ERR "adsp: not patching %s (paddr & kvaddr),"
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" lookup (%p, %ld) failed\n",
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module->name, vaddr, len);
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return ret;
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}
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*paddr = region->paddr + (vaddr - region->vaddr);
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*kvaddr = region->kvaddr + (vaddr - region->vaddr);
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return 0;
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}
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int adsp_pmem_fixup(struct msm_adsp_module *module, void **addr,
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unsigned long len)
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{
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struct adsp_pmem_region *region;
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void *vaddr = *addr;
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unsigned long *paddr = (unsigned long *)addr;
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int ret;
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ret = adsp_pmem_lookup_vaddr(module, addr, len, ®ion);
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if (ret) {
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printk(KERN_ERR "adsp: not patching %s, lookup (%p, %ld) failed\n",
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module->name, vaddr, len);
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return ret;
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}
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*paddr = region->paddr + (vaddr - region->vaddr);
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return 0;
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}
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static int adsp_verify_cmd(struct msm_adsp_module *module,
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unsigned int queue_id, void *cmd_data,
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size_t cmd_size)
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{
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/* call the per module verifier */
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if (module->verify_cmd)
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return module->verify_cmd(module, queue_id, cmd_data,
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cmd_size);
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else
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printk(KERN_INFO "adsp: no packet verifying function "
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"for task %s\n", module->name);
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return 0;
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}
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static long adsp_write_cmd(struct adsp_device *adev, void __user *arg)
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{
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struct adsp_command_t cmd;
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unsigned char buf[256];
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void *cmd_data;
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long rc;
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if (copy_from_user(&cmd, (void __user *)arg, sizeof(cmd)))
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return -EFAULT;
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if (cmd.len > 256) {
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cmd_data = kmalloc(cmd.len, GFP_USER);
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if (!cmd_data)
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return -ENOMEM;
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} else {
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cmd_data = buf;
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}
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if (copy_from_user(cmd_data, (void __user *)(cmd.data), cmd.len)) {
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rc = -EFAULT;
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goto end;
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}
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mutex_lock(&adev->module->pmem_regions_lock);
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if (adsp_verify_cmd(adev->module, cmd.queue, cmd_data, cmd.len)) {
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printk(KERN_ERR "module %s: verify failed.\n",
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adev->module->name);
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rc = -EINVAL;
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goto end;
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}
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rc = msm_adsp_write(adev->module, cmd.queue, cmd_data, cmd.len);
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end:
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mutex_unlock(&adev->module->pmem_regions_lock);
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if (cmd.len > 256)
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kfree(cmd_data);
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return rc;
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}
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static int adsp_events_pending(struct adsp_device *adev)
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{
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unsigned long flags;
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int yes;
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spin_lock_irqsave(&adev->event_queue_lock, flags);
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yes = !list_empty(&adev->event_queue);
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spin_unlock_irqrestore(&adev->event_queue_lock, flags);
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return yes || adev->abort;
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}
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static int adsp_pmem_lookup_paddr(struct msm_adsp_module *module, void **addr,
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struct adsp_pmem_region **region)
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{
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struct hlist_node *node;
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unsigned long paddr = (unsigned long)(*addr);
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struct adsp_pmem_region *region_elt;
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hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) {
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if (paddr >= region_elt->paddr &&
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paddr < region_elt->paddr + region_elt->len) {
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*region = region_elt;
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return 0;
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}
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}
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return -1;
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}
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int adsp_pmem_paddr_fixup(struct msm_adsp_module *module, void **addr)
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{
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struct adsp_pmem_region *region;
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unsigned long paddr = (unsigned long)(*addr);
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unsigned long *vaddr = (unsigned long *)addr;
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int ret;
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ret = adsp_pmem_lookup_paddr(module, addr, ®ion);
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if (ret) {
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printk(KERN_ERR "adsp: not patching %s, paddr %p lookup failed\n",
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module->name, vaddr);
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return ret;
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}
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*vaddr = (unsigned long)region->vaddr + (paddr - region->paddr);
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return 0;
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}
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static int adsp_patch_event(struct msm_adsp_module *module,
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struct adsp_event *event)
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{
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/* call the per-module msg verifier */
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if (module->patch_event)
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return module->patch_event(module, event);
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return 0;
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}
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static long adsp_get_event(struct adsp_device *adev, void __user *arg)
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{
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unsigned long flags;
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struct adsp_event *data = NULL;
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struct adsp_event_t evt;
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int timeout;
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long rc = 0;
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if (copy_from_user(&evt, arg, sizeof(struct adsp_event_t)))
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return -EFAULT;
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timeout = (int)evt.timeout_ms;
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if (timeout > 0) {
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rc = wait_event_interruptible_timeout(
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adev->event_wait, adsp_events_pending(adev),
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msecs_to_jiffies(timeout));
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if (rc == 0)
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return -ETIMEDOUT;
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} else {
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rc = wait_event_interruptible(
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adev->event_wait, adsp_events_pending(adev));
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}
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if (rc < 0)
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return rc;
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if (adev->abort)
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return -ENODEV;
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spin_lock_irqsave(&adev->event_queue_lock, flags);
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if (!list_empty(&adev->event_queue)) {
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data = list_first_entry(&adev->event_queue,
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struct adsp_event, list);
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list_del(&data->list);
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}
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spin_unlock_irqrestore(&adev->event_queue_lock, flags);
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if (!data)
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return -EAGAIN;
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/* DSP messages are type 0; they may contain physical addresses */
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if (data->type == 0)
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adsp_patch_event(adev->module, data);
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/* map adsp_event --> adsp_event_t */
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if (evt.len < data->size) {
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rc = -ETOOSMALL;
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goto end;
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}
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if (data->msg_id != EVENT_MSG_ID) {
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if (copy_to_user((void *)(evt.data), data->data.msg16,
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data->size)) {
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rc = -EFAULT;
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goto end;
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}
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} else {
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if (copy_to_user((void *)(evt.data), data->data.msg32,
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data->size)) {
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rc = -EFAULT;
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goto end;
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}
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}
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evt.type = data->type; /* 0 --> from aDSP, 1 --> from ARM9 */
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evt.msg_id = data->msg_id;
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evt.flags = data->is16;
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evt.len = data->size;
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if (copy_to_user(arg, &evt, sizeof(evt)))
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rc = -EFAULT;
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end:
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kfree(data);
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return rc;
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}
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static long adsp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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{
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struct adsp_device *adev = filp->private_data;
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switch (cmd) {
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case ADSP_IOCTL_ENABLE:
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return msm_adsp_enable(adev->module);
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case ADSP_IOCTL_DISABLE:
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return msm_adsp_disable(adev->module);
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case ADSP_IOCTL_DISABLE_EVENT_RSP:
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return 0;
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case ADSP_IOCTL_DISABLE_ACK:
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pr_err("adsp: ADSP_IOCTL_DISABLE_ACK is not implemented.\n");
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break;
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case ADSP_IOCTL_WRITE_COMMAND:
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return adsp_write_cmd(adev, (void __user *) arg);
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case ADSP_IOCTL_GET_EVENT:
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return adsp_get_event(adev, (void __user *) arg);
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case ADSP_IOCTL_SET_CLKRATE: {
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#if CONFIG_MSM_AMSS_VERSION==6350
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unsigned long clk_rate;
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if (copy_from_user(&clk_rate, (void *) arg, sizeof(clk_rate)))
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return -EFAULT;
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return adsp_set_clkrate(adev->module, clk_rate);
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#endif
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}
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case ADSP_IOCTL_REGISTER_PMEM: {
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struct adsp_pmem_info info;
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if (copy_from_user(&info, (void *) arg, sizeof(info)))
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return -EFAULT;
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return adsp_pmem_add(adev->module, &info);
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}
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case ADSP_IOCTL_ABORT_EVENT_READ:
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adev->abort = 1;
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wake_up(&adev->event_wait);
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break;
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|
|
default:
|
|
break;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int adsp_release(struct inode *inode, struct file *filp)
|
|
{
|
|
struct adsp_device *adev = filp->private_data;
|
|
struct msm_adsp_module *module = adev->module;
|
|
struct hlist_node *node, *tmp;
|
|
struct adsp_pmem_region *region;
|
|
|
|
pr_info("adsp_release() '%s'\n", adev->name);
|
|
|
|
/* clear module before putting it to avoid race with open() */
|
|
adev->module = NULL;
|
|
|
|
mutex_lock(&module->pmem_regions_lock);
|
|
hlist_for_each_safe(node, tmp, &module->pmem_regions) {
|
|
region = hlist_entry(node, struct adsp_pmem_region, list);
|
|
hlist_del(node);
|
|
put_pmem_file(region->file);
|
|
kfree(region);
|
|
}
|
|
mutex_unlock(&module->pmem_regions_lock);
|
|
BUG_ON(!hlist_empty(&module->pmem_regions));
|
|
|
|
msm_adsp_put(module);
|
|
return 0;
|
|
}
|
|
|
|
static void adsp_event(void *driver_data, unsigned id, size_t len,
|
|
void (*getevent)(void *ptr, size_t len))
|
|
{
|
|
struct adsp_device *adev = driver_data;
|
|
struct adsp_event *event;
|
|
unsigned long flags;
|
|
|
|
if (len > ADSP_EVENT_MAX_SIZE) {
|
|
pr_err("adsp_event: event too large (%d bytes)\n", len);
|
|
return;
|
|
}
|
|
|
|
event = kmalloc(sizeof(*event), GFP_ATOMIC);
|
|
if (!event) {
|
|
pr_err("adsp_event: cannot allocate buffer\n");
|
|
return;
|
|
}
|
|
|
|
if (id != EVENT_MSG_ID) {
|
|
event->type = 0;
|
|
event->is16 = 0;
|
|
event->msg_id = id;
|
|
event->size = len;
|
|
|
|
getevent(event->data.msg16, len);
|
|
} else {
|
|
event->type = 1;
|
|
event->is16 = 1;
|
|
event->msg_id = id;
|
|
event->size = len;
|
|
getevent(event->data.msg32, len);
|
|
}
|
|
|
|
spin_lock_irqsave(&adev->event_queue_lock, flags);
|
|
list_add_tail(&event->list, &adev->event_queue);
|
|
spin_unlock_irqrestore(&adev->event_queue_lock, flags);
|
|
wake_up(&adev->event_wait);
|
|
}
|
|
|
|
static struct msm_adsp_ops adsp_ops = {
|
|
.event = adsp_event,
|
|
};
|
|
|
|
static int adsp_open(struct inode *inode, struct file *filp)
|
|
{
|
|
struct adsp_device *adev;
|
|
int rc;
|
|
|
|
rc = nonseekable_open(inode, filp);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
adev = inode_to_device(inode);
|
|
if (!adev)
|
|
return -ENODEV;
|
|
|
|
pr_info("adsp_open() name = '%s'\n", adev->name);
|
|
|
|
rc = msm_adsp_get(adev->name, &adev->module, &adsp_ops, adev);
|
|
if (rc)
|
|
return rc;
|
|
|
|
pr_info("adsp_open() module '%s' adev %p\n", adev->name, adev);
|
|
filp->private_data = adev;
|
|
adev->abort = 0;
|
|
INIT_HLIST_HEAD(&adev->module->pmem_regions);
|
|
mutex_init(&adev->module->pmem_regions_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned adsp_device_count;
|
|
static struct adsp_device *adsp_devices;
|
|
|
|
static struct adsp_device *inode_to_device(struct inode *inode)
|
|
{
|
|
unsigned n = MINOR(inode->i_rdev);
|
|
if (n < adsp_device_count) {
|
|
if (adsp_devices[n].device)
|
|
return adsp_devices + n;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static dev_t adsp_devno;
|
|
static struct class *adsp_class;
|
|
|
|
static struct file_operations adsp_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = adsp_open,
|
|
.unlocked_ioctl = adsp_ioctl,
|
|
.release = adsp_release,
|
|
};
|
|
|
|
static void adsp_create(struct adsp_device *adev, const char *name,
|
|
struct device *parent, dev_t devt)
|
|
{
|
|
struct device *dev;
|
|
int rc;
|
|
|
|
dev = device_create(adsp_class, parent, devt, "%s", name);
|
|
if (IS_ERR(dev))
|
|
return;
|
|
|
|
init_waitqueue_head(&adev->event_wait);
|
|
INIT_LIST_HEAD(&adev->event_queue);
|
|
spin_lock_init(&adev->event_queue_lock);
|
|
|
|
cdev_init(&adev->cdev, &adsp_fops);
|
|
adev->cdev.owner = THIS_MODULE;
|
|
|
|
rc = cdev_add(&adev->cdev, devt, 1);
|
|
if (rc < 0) {
|
|
device_destroy(adsp_class, devt);
|
|
} else {
|
|
adev->device = dev;
|
|
adev->name = name;
|
|
}
|
|
}
|
|
|
|
void msm_adsp_publish_cdevs(struct msm_adsp_module *modules, unsigned n)
|
|
{
|
|
int rc;
|
|
|
|
adsp_devices = kzalloc(sizeof(struct adsp_device) * n, GFP_KERNEL);
|
|
if (!adsp_devices)
|
|
return;
|
|
|
|
adsp_class = class_create(THIS_MODULE, "adsp");
|
|
if (IS_ERR(adsp_class))
|
|
goto fail_create_class;
|
|
|
|
rc = alloc_chrdev_region(&adsp_devno, 0, n, "adsp");
|
|
if (rc < 0)
|
|
goto fail_alloc_region;
|
|
|
|
adsp_device_count = n;
|
|
for (n = 0; n < adsp_device_count; n++) {
|
|
adsp_create(adsp_devices + n,
|
|
modules[n].name, &modules[n].pdev.dev,
|
|
MKDEV(MAJOR(adsp_devno), n));
|
|
}
|
|
|
|
return;
|
|
|
|
fail_alloc_region:
|
|
class_unregister(adsp_class);
|
|
fail_create_class:
|
|
kfree(adsp_devices);
|
|
}
|