![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>
315 lines
7.2 KiB
C
315 lines
7.2 KiB
C
/* arch/arm/mach-msm/qdsp5/audmgr.c
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*
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* interface to "audmgr" service on the baseband cpu
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*
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* Copyright (C) 2008 Google, Inc.
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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/module.h>
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#include <linux/fs.h>
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#include <linux/uaccess.h>
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#include <linux/slab.h>
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#include <linux/kthread.h>
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#include <linux/wait.h>
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#include <asm/atomic.h>
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#include <mach/msm_rpcrouter.h>
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#include "audmgr.h"
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#define STATE_CLOSED 0
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#define STATE_DISABLED 1
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#define STATE_ENABLING 2
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#define STATE_ENABLED 3
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#define STATE_DISABLING 4
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#define STATE_ERROR 5
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static void rpc_ack(struct msm_rpc_endpoint *ept, uint32_t xid)
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{
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uint32_t rep[6];
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rep[0] = cpu_to_be32(xid);
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rep[1] = cpu_to_be32(1);
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rep[2] = cpu_to_be32(RPCMSG_REPLYSTAT_ACCEPTED);
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rep[3] = cpu_to_be32(RPC_ACCEPTSTAT_SUCCESS);
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rep[4] = 0;
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rep[5] = 0;
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msm_rpc_write(ept, rep, sizeof(rep));
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}
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static void process_audmgr_callback(struct audmgr *am,
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struct rpc_audmgr_cb_func_ptr *args,
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int len)
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{
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if (len < (sizeof(uint32_t) * 3))
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return;
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if (be32_to_cpu(args->set_to_one) != 1)
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return;
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switch (be32_to_cpu(args->status)) {
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case RPC_AUDMGR_STATUS_READY:
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if (len < sizeof(uint32_t) * 4)
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break;
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am->handle = be32_to_cpu(args->u.handle);
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pr_info("audmgr: rpc READY handle=0x%08x\n", am->handle);
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break;
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case RPC_AUDMGR_STATUS_CODEC_CONFIG: {
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uint32_t volume;
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if (len < sizeof(uint32_t) * 4)
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break;
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volume = be32_to_cpu(args->u.volume);
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pr_info("audmgr: rpc CODEC_CONFIG volume=0x%08x\n", volume);
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am->state = STATE_ENABLED;
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wake_up(&am->wait);
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break;
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}
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case RPC_AUDMGR_STATUS_PENDING:
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pr_err("audmgr: PENDING?\n");
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break;
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case RPC_AUDMGR_STATUS_SUSPEND:
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pr_err("audmgr: SUSPEND?\n");
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break;
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case RPC_AUDMGR_STATUS_FAILURE:
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pr_err("audmgr: FAILURE\n");
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break;
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case RPC_AUDMGR_STATUS_VOLUME_CHANGE:
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pr_err("audmgr: VOLUME_CHANGE?\n");
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break;
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case RPC_AUDMGR_STATUS_DISABLED:
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pr_err("audmgr: DISABLED\n");
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am->state = STATE_DISABLED;
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wake_up(&am->wait);
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break;
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case RPC_AUDMGR_STATUS_ERROR:
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pr_err("audmgr: ERROR?\n");
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am->state = STATE_ERROR;
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wake_up(&am->wait);
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break;
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default:
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break;
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}
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}
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static void process_rpc_request(uint32_t proc, uint32_t xid,
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void *data, int len, void *private)
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{
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struct audmgr *am = private;
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uint32_t *x = data;
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if (0) {
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int n = len / 4;
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pr_info("rpc_call proc %d:", proc);
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while (n--)
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printk(" %08x", be32_to_cpu(*x++));
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printk("\n");
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}
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if (proc == AUDMGR_CB_FUNC_PTR)
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process_audmgr_callback(am, data, len);
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else
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pr_err("audmgr: unknown rpc proc %d\n", proc);
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rpc_ack(am->ept, xid);
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}
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#define RPC_TYPE_REQUEST 0
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#define RPC_TYPE_REPLY 1
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#define RPC_VERSION 2
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#define RPC_COMMON_HDR_SZ (sizeof(uint32_t) * 2)
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#define RPC_REQUEST_HDR_SZ (sizeof(struct rpc_request_hdr))
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#define RPC_REPLY_HDR_SZ (sizeof(uint32_t) * 3)
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#define RPC_REPLY_SZ (sizeof(uint32_t) * 6)
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static int audmgr_rpc_thread(void *data)
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{
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struct audmgr *am = data;
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struct rpc_request_hdr *hdr = NULL;
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uint32_t type;
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int len;
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pr_info("audmgr_rpc_thread() start\n");
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while (!kthread_should_stop()) {
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if (hdr) {
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kfree(hdr);
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hdr = NULL;
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}
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len = msm_rpc_read(am->ept, (void **) &hdr, -1, -1);
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if (len < 0) {
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pr_err("audmgr: rpc read failed (%d)\n", len);
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break;
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}
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if (len < RPC_COMMON_HDR_SZ)
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continue;
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type = be32_to_cpu(hdr->type);
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if (type == RPC_TYPE_REPLY) {
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struct rpc_reply_hdr *rep = (void *) hdr;
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uint32_t status;
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if (len < RPC_REPLY_HDR_SZ)
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continue;
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status = be32_to_cpu(rep->reply_stat);
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if (status == RPCMSG_REPLYSTAT_ACCEPTED) {
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status = be32_to_cpu(rep->data.acc_hdr.accept_stat);
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pr_info("audmgr: rpc_reply status %d\n", status);
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} else {
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pr_info("audmgr: rpc_reply denied!\n");
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}
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/* process reply */
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continue;
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}
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if (len < RPC_REQUEST_HDR_SZ)
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continue;
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process_rpc_request(be32_to_cpu(hdr->procedure),
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be32_to_cpu(hdr->xid),
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(void *) (hdr + 1),
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len - sizeof(*hdr),
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data);
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}
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pr_info("audmgr_rpc_thread() exit\n");
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if (hdr) {
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kfree(hdr);
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hdr = NULL;
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}
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am->task = NULL;
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wake_up(&am->wait);
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return 0;
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}
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struct audmgr_enable_msg {
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struct rpc_request_hdr hdr;
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struct rpc_audmgr_enable_client_args args;
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};
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struct audmgr_disable_msg {
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struct rpc_request_hdr hdr;
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uint32_t handle;
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};
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int audmgr_open(struct audmgr *am)
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{
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int rc;
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if (am->state != STATE_CLOSED)
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return 0;
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am->ept = msm_rpc_connect(AUDMGR_PROG,
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AUDMGR_VERS,
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MSM_RPC_UNINTERRUPTIBLE);
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init_waitqueue_head(&am->wait);
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if (IS_ERR(am->ept)) {
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rc = PTR_ERR(am->ept);
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am->ept = NULL;
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pr_err("audmgr: failed to connect to audmgr svc\n");
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return rc;
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}
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am->task = kthread_run(audmgr_rpc_thread, am, "audmgr_rpc");
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if (IS_ERR(am->task)) {
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rc = PTR_ERR(am->task);
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am->task = NULL;
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msm_rpc_close(am->ept);
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am->ept = NULL;
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return rc;
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}
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am->state = STATE_DISABLED;
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return 0;
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}
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EXPORT_SYMBOL(audmgr_open);
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int audmgr_close(struct audmgr *am)
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{
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return -EBUSY;
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}
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EXPORT_SYMBOL(audmgr_close);
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int audmgr_enable(struct audmgr *am, struct audmgr_config *cfg)
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{
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struct audmgr_enable_msg msg;
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int rc;
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if (am->state == STATE_ENABLED)
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return 0;
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if (am->state == STATE_DISABLING)
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pr_err("audmgr: state is DISABLING in enable?\n");
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am->state = STATE_ENABLING;
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msg.args.set_to_one = cpu_to_be32(1);
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msg.args.tx_sample_rate = cpu_to_be32(cfg->tx_rate);
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msg.args.rx_sample_rate = cpu_to_be32(cfg->rx_rate);
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msg.args.def_method = cpu_to_be32(cfg->def_method);
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msg.args.codec_type = cpu_to_be32(cfg->codec);
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msg.args.snd_method = cpu_to_be32(cfg->snd_method);
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msg.args.cb_func = cpu_to_be32(0x11111111);
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msg.args.client_data = cpu_to_be32(0x11223344);
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msm_rpc_setup_req(&msg.hdr, AUDMGR_PROG, msm_rpc_get_vers(am->ept),
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AUDMGR_ENABLE_CLIENT);
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rc = msm_rpc_write(am->ept, &msg, sizeof(msg));
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if (rc < 0)
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return rc;
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rc = wait_event_timeout(am->wait, am->state != STATE_ENABLING, 15 * HZ);
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if (rc == 0) {
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pr_err("audmgr_enable: ARM9 did not reply to RPC am->state = %d\n", am->state);
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BUG();
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}
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if (am->state == STATE_ENABLED)
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return 0;
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pr_err("audmgr: unexpected state %d while enabling?!\n", am->state);
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return -ENODEV;
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}
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EXPORT_SYMBOL(audmgr_enable);
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int audmgr_disable(struct audmgr *am)
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{
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struct audmgr_disable_msg msg;
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int rc;
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if (am->state == STATE_DISABLED)
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return 0;
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msm_rpc_setup_req(&msg.hdr, AUDMGR_PROG, msm_rpc_get_vers(am->ept),
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AUDMGR_DISABLE_CLIENT);
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msg.handle = cpu_to_be32(am->handle);
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am->state = STATE_DISABLING;
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rc = msm_rpc_write(am->ept, &msg, sizeof(msg));
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if (rc < 0)
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return rc;
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rc = wait_event_timeout(am->wait, am->state != STATE_DISABLING, 15 * HZ);
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if (rc == 0) {
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pr_err("audmgr_disable: ARM9 did not reply to RPC am->state = %d\n", am->state);
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BUG();
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}
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if (am->state == STATE_DISABLED)
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return 0;
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pr_err("audmgr: unexpected state %d while disabling?!\n", am->state);
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return -ENODEV;
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}
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EXPORT_SYMBOL(audmgr_disable);
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