![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>
366 lines
10 KiB
C
366 lines
10 KiB
C
/*======================================================================
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Device driver for the PCMCIA control functionality of PXA2xx
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microprocessors.
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The contents of this file may be used under the
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terms of the GNU Public License version 2 (the "GPL")
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(c) Ian Molton (spyro@f2s.com) 2003
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(c) Stefan Eletzhofer (stefan.eletzhofer@inquant.de) 2003,4
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derived from sa11xx_base.c
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Portions created by John G. Dorsey are
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Copyright (C) 1999 John G. Dorsey.
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======================================================================*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/cpufreq.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <linux/platform_device.h>
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#include <mach/hardware.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/system.h>
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#include <mach/pxa2xx-regs.h>
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#include <asm/mach-types.h>
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#include <pcmcia/cs_types.h>
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#include <pcmcia/ss.h>
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#include <pcmcia/cistpl.h>
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#include "soc_common.h"
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#include "pxa2xx_base.h"
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/*
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* Personal Computer Memory Card International Association (PCMCIA) sockets
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*/
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#define PCMCIAPrtSp 0x04000000 /* PCMCIA Partition Space [byte] */
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#define PCMCIASp (4*PCMCIAPrtSp) /* PCMCIA Space [byte] */
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#define PCMCIAIOSp PCMCIAPrtSp /* PCMCIA I/O Space [byte] */
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#define PCMCIAAttrSp PCMCIAPrtSp /* PCMCIA Attribute Space [byte] */
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#define PCMCIAMemSp PCMCIAPrtSp /* PCMCIA Memory Space [byte] */
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#define PCMCIA0Sp PCMCIASp /* PCMCIA 0 Space [byte] */
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#define PCMCIA0IOSp PCMCIAIOSp /* PCMCIA 0 I/O Space [byte] */
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#define PCMCIA0AttrSp PCMCIAAttrSp /* PCMCIA 0 Attribute Space [byte] */
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#define PCMCIA0MemSp PCMCIAMemSp /* PCMCIA 0 Memory Space [byte] */
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#define PCMCIA1Sp PCMCIASp /* PCMCIA 1 Space [byte] */
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#define PCMCIA1IOSp PCMCIAIOSp /* PCMCIA 1 I/O Space [byte] */
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#define PCMCIA1AttrSp PCMCIAAttrSp /* PCMCIA 1 Attribute Space [byte] */
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#define PCMCIA1MemSp PCMCIAMemSp /* PCMCIA 1 Memory Space [byte] */
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#define _PCMCIA(Nb) /* PCMCIA [0..1] */ \
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(0x20000000 + (Nb) * PCMCIASp)
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#define _PCMCIAIO(Nb) _PCMCIA(Nb) /* PCMCIA I/O [0..1] */
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#define _PCMCIAAttr(Nb) /* PCMCIA Attribute [0..1] */ \
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(_PCMCIA(Nb) + 2 * PCMCIAPrtSp)
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#define _PCMCIAMem(Nb) /* PCMCIA Memory [0..1] */ \
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(_PCMCIA(Nb) + 3 * PCMCIAPrtSp)
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#define _PCMCIA0 _PCMCIA(0) /* PCMCIA 0 */
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#define _PCMCIA0IO _PCMCIAIO(0) /* PCMCIA 0 I/O */
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#define _PCMCIA0Attr _PCMCIAAttr(0) /* PCMCIA 0 Attribute */
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#define _PCMCIA0Mem _PCMCIAMem(0) /* PCMCIA 0 Memory */
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#define _PCMCIA1 _PCMCIA(1) /* PCMCIA 1 */
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#define _PCMCIA1IO _PCMCIAIO(1) /* PCMCIA 1 I/O */
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#define _PCMCIA1Attr _PCMCIAAttr(1) /* PCMCIA 1 Attribute */
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#define _PCMCIA1Mem _PCMCIAMem(1) /* PCMCIA 1 Memory */
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#define MCXX_SETUP_MASK (0x7f)
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#define MCXX_ASST_MASK (0x1f)
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#define MCXX_HOLD_MASK (0x3f)
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#define MCXX_SETUP_SHIFT (0)
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#define MCXX_ASST_SHIFT (7)
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#define MCXX_HOLD_SHIFT (14)
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static inline u_int pxa2xx_mcxx_hold(u_int pcmcia_cycle_ns,
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u_int mem_clk_10khz)
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{
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u_int code = pcmcia_cycle_ns * mem_clk_10khz;
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return (code / 300000) + ((code % 300000) ? 1 : 0) - 1;
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}
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static inline u_int pxa2xx_mcxx_asst(u_int pcmcia_cycle_ns,
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u_int mem_clk_10khz)
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{
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u_int code = pcmcia_cycle_ns * mem_clk_10khz;
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return (code / 300000) + ((code % 300000) ? 1 : 0) + 1;
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}
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static inline u_int pxa2xx_mcxx_setup(u_int pcmcia_cycle_ns,
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u_int mem_clk_10khz)
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{
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u_int code = pcmcia_cycle_ns * mem_clk_10khz;
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return (code / 100000) + ((code % 100000) ? 1 : 0) - 1;
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}
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/* This function returns the (approximate) command assertion period, in
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* nanoseconds, for a given CPU clock frequency and MCXX_ASST value:
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*/
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static inline u_int pxa2xx_pcmcia_cmd_time(u_int mem_clk_10khz,
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u_int pcmcia_mcxx_asst)
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{
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return (300000 * (pcmcia_mcxx_asst + 1) / mem_clk_10khz);
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}
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static int pxa2xx_pcmcia_set_mcmem( int sock, int speed, int clock )
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{
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MCMEM(sock) = ((pxa2xx_mcxx_setup(speed, clock)
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& MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
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| ((pxa2xx_mcxx_asst(speed, clock)
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& MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
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| ((pxa2xx_mcxx_hold(speed, clock)
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& MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
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return 0;
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}
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static int pxa2xx_pcmcia_set_mcio( int sock, int speed, int clock )
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{
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MCIO(sock) = ((pxa2xx_mcxx_setup(speed, clock)
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& MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
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| ((pxa2xx_mcxx_asst(speed, clock)
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& MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
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| ((pxa2xx_mcxx_hold(speed, clock)
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& MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
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return 0;
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}
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static int pxa2xx_pcmcia_set_mcatt( int sock, int speed, int clock )
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{
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MCATT(sock) = ((pxa2xx_mcxx_setup(speed, clock)
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& MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
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| ((pxa2xx_mcxx_asst(speed, clock)
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& MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
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| ((pxa2xx_mcxx_hold(speed, clock)
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& MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
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return 0;
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}
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static int pxa2xx_pcmcia_set_mcxx(struct soc_pcmcia_socket *skt, unsigned int clk)
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{
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struct soc_pcmcia_timing timing;
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int sock = skt->nr;
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soc_common_pcmcia_get_timing(skt, &timing);
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pxa2xx_pcmcia_set_mcmem(sock, timing.mem, clk);
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pxa2xx_pcmcia_set_mcatt(sock, timing.attr, clk);
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pxa2xx_pcmcia_set_mcio(sock, timing.io, clk);
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return 0;
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}
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static int pxa2xx_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
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{
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unsigned int clk = get_memclk_frequency_10khz();
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return pxa2xx_pcmcia_set_mcxx(skt, clk);
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}
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#ifdef CONFIG_CPU_FREQ
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static int
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pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
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unsigned long val,
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struct cpufreq_freqs *freqs)
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{
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#warning "it's not clear if this is right since the core CPU (N) clock has no effect on the memory (L) clock"
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switch (val) {
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case CPUFREQ_PRECHANGE:
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if (freqs->new > freqs->old) {
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debug(skt, 2, "new frequency %u.%uMHz > %u.%uMHz, "
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"pre-updating\n",
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freqs->new / 1000, (freqs->new / 100) % 10,
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freqs->old / 1000, (freqs->old / 100) % 10);
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pxa2xx_pcmcia_set_mcxx(skt, freqs->new);
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}
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break;
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case CPUFREQ_POSTCHANGE:
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if (freqs->new < freqs->old) {
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debug(skt, 2, "new frequency %u.%uMHz < %u.%uMHz, "
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"post-updating\n",
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freqs->new / 1000, (freqs->new / 100) % 10,
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freqs->old / 1000, (freqs->old / 100) % 10);
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pxa2xx_pcmcia_set_mcxx(skt, freqs->new);
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}
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break;
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}
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return 0;
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}
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#endif
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static void pxa2xx_configure_sockets(struct device *dev)
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{
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struct pcmcia_low_level *ops = dev->platform_data;
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/*
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* We have at least one socket, so set MECR:CIT
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* (Card Is There)
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*/
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MECR |= MECR_CIT;
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/* Set MECR:NOS (Number Of Sockets) */
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if ((ops->first + ops->nr) > 1 ||
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machine_is_viper() || machine_is_arcom_zeus())
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MECR |= MECR_NOS;
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else
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MECR &= ~MECR_NOS;
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}
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static const char *skt_names[] = {
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"PCMCIA socket 0",
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"PCMCIA socket 1",
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};
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#define SKT_DEV_INFO_SIZE(n) \
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(sizeof(struct skt_dev_info) + (n)*sizeof(struct soc_pcmcia_socket))
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int pxa2xx_drv_pcmcia_add_one(struct soc_pcmcia_socket *skt)
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{
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skt->res_skt.start = _PCMCIA(skt->nr);
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skt->res_skt.end = _PCMCIA(skt->nr) + PCMCIASp - 1;
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skt->res_skt.name = skt_names[skt->nr];
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skt->res_skt.flags = IORESOURCE_MEM;
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skt->res_io.start = _PCMCIAIO(skt->nr);
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skt->res_io.end = _PCMCIAIO(skt->nr) + PCMCIAIOSp - 1;
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skt->res_io.name = "io";
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skt->res_io.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
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skt->res_mem.start = _PCMCIAMem(skt->nr);
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skt->res_mem.end = _PCMCIAMem(skt->nr) + PCMCIAMemSp - 1;
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skt->res_mem.name = "memory";
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skt->res_mem.flags = IORESOURCE_MEM;
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skt->res_attr.start = _PCMCIAAttr(skt->nr);
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skt->res_attr.end = _PCMCIAAttr(skt->nr) + PCMCIAAttrSp - 1;
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skt->res_attr.name = "attribute";
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skt->res_attr.flags = IORESOURCE_MEM;
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return soc_pcmcia_add_one(skt);
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}
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EXPORT_SYMBOL(pxa2xx_drv_pcmcia_add_one);
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void pxa2xx_drv_pcmcia_ops(struct pcmcia_low_level *ops)
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{
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/* Provide our PXA2xx specific timing routines. */
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ops->set_timing = pxa2xx_pcmcia_set_timing;
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#ifdef CONFIG_CPU_FREQ
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ops->frequency_change = pxa2xx_pcmcia_frequency_change;
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#endif
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}
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EXPORT_SYMBOL(pxa2xx_drv_pcmcia_ops);
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static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev)
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{
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int i, ret = 0;
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struct pcmcia_low_level *ops;
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struct skt_dev_info *sinfo;
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struct soc_pcmcia_socket *skt;
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ops = (struct pcmcia_low_level *)dev->dev.platform_data;
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if (!ops)
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return -ENODEV;
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pxa2xx_drv_pcmcia_ops(ops);
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sinfo = kzalloc(SKT_DEV_INFO_SIZE(ops->nr), GFP_KERNEL);
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if (!sinfo)
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return -ENOMEM;
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sinfo->nskt = ops->nr;
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/* Initialize processor specific parameters */
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for (i = 0; i < ops->nr; i++) {
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skt = &sinfo->skt[i];
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skt->nr = ops->first + i;
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skt->ops = ops;
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skt->socket.owner = ops->owner;
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skt->socket.dev.parent = &dev->dev;
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skt->socket.pci_irq = NO_IRQ;
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ret = pxa2xx_drv_pcmcia_add_one(skt);
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if (ret)
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break;
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}
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if (ret) {
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while (--i >= 0)
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soc_pcmcia_remove_one(&sinfo->skt[i]);
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kfree(sinfo);
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} else {
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pxa2xx_configure_sockets(&dev->dev);
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dev_set_drvdata(&dev->dev, sinfo);
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}
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return ret;
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}
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static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev)
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{
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struct skt_dev_info *sinfo = platform_get_drvdata(dev);
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int i;
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platform_set_drvdata(dev, NULL);
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for (i = 0; i < sinfo->nskt; i++)
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soc_pcmcia_remove_one(&sinfo->skt[i]);
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kfree(sinfo);
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return 0;
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}
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static int pxa2xx_drv_pcmcia_resume(struct device *dev)
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{
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pxa2xx_configure_sockets(dev);
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return 0;
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}
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static const struct dev_pm_ops pxa2xx_drv_pcmcia_pm_ops = {
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.resume = pxa2xx_drv_pcmcia_resume,
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};
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static struct platform_driver pxa2xx_pcmcia_driver = {
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.probe = pxa2xx_drv_pcmcia_probe,
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.remove = pxa2xx_drv_pcmcia_remove,
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.driver = {
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.name = "pxa2xx-pcmcia",
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.owner = THIS_MODULE,
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.pm = &pxa2xx_drv_pcmcia_pm_ops,
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},
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};
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static int __init pxa2xx_pcmcia_init(void)
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{
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return platform_driver_register(&pxa2xx_pcmcia_driver);
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}
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static void __exit pxa2xx_pcmcia_exit(void)
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{
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platform_driver_unregister(&pxa2xx_pcmcia_driver);
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}
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fs_initcall(pxa2xx_pcmcia_init);
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module_exit(pxa2xx_pcmcia_exit);
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MODULE_AUTHOR("Stefan Eletzhofer <stefan.eletzhofer@inquant.de> and Ian Molton <spyro@f2s.com>");
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MODULE_DESCRIPTION("Linux PCMCIA Card Services: PXA2xx core socket driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:pxa2xx-pcmcia");
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