![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>
1020 lines
25 KiB
C
1020 lines
25 KiB
C
/*
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*
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* FIXME: Properly make this race free with refcounting etc...
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*
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* FIXME: LOCKING !!!
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*/
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <asm/prom.h>
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#include <asm/pmac_pfunc.h>
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/* Debug */
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#define LOG_PARSE(fmt...)
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#define LOG_ERROR(fmt...) printk(fmt)
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#define LOG_BLOB(t,b,c)
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(fmt...) printk(fmt)
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#else
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#define DBG(fmt...)
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#endif
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/* Command numbers */
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#define PMF_CMD_LIST 0
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#define PMF_CMD_WRITE_GPIO 1
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#define PMF_CMD_READ_GPIO 2
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#define PMF_CMD_WRITE_REG32 3
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#define PMF_CMD_READ_REG32 4
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#define PMF_CMD_WRITE_REG16 5
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#define PMF_CMD_READ_REG16 6
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#define PMF_CMD_WRITE_REG8 7
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#define PMF_CMD_READ_REG8 8
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#define PMF_CMD_DELAY 9
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#define PMF_CMD_WAIT_REG32 10
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#define PMF_CMD_WAIT_REG16 11
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#define PMF_CMD_WAIT_REG8 12
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#define PMF_CMD_READ_I2C 13
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#define PMF_CMD_WRITE_I2C 14
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#define PMF_CMD_RMW_I2C 15
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#define PMF_CMD_GEN_I2C 16
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#define PMF_CMD_SHIFT_BYTES_RIGHT 17
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#define PMF_CMD_SHIFT_BYTES_LEFT 18
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#define PMF_CMD_READ_CFG 19
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#define PMF_CMD_WRITE_CFG 20
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#define PMF_CMD_RMW_CFG 21
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#define PMF_CMD_READ_I2C_SUBADDR 22
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#define PMF_CMD_WRITE_I2C_SUBADDR 23
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#define PMF_CMD_SET_I2C_MODE 24
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#define PMF_CMD_RMW_I2C_SUBADDR 25
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#define PMF_CMD_READ_REG32_MASK_SHR_XOR 26
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#define PMF_CMD_READ_REG16_MASK_SHR_XOR 27
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#define PMF_CMD_READ_REG8_MASK_SHR_XOR 28
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#define PMF_CMD_WRITE_REG32_SHL_MASK 29
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#define PMF_CMD_WRITE_REG16_SHL_MASK 30
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#define PMF_CMD_WRITE_REG8_SHL_MASK 31
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#define PMF_CMD_MASK_AND_COMPARE 32
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#define PMF_CMD_COUNT 33
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/* This structure holds the state of the parser while walking through
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* a function definition
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*/
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struct pmf_cmd {
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const void *cmdptr;
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const void *cmdend;
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struct pmf_function *func;
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void *instdata;
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struct pmf_args *args;
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int error;
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};
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#if 0
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/* Debug output */
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static void print_blob(const char *title, const void *blob, int bytes)
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{
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printk("%s", title);
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while(bytes--) {
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printk("%02x ", *((u8 *)blob));
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blob += 1;
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}
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printk("\n");
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}
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#endif
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/*
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* Parser helpers
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*/
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static u32 pmf_next32(struct pmf_cmd *cmd)
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{
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u32 value;
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if ((cmd->cmdend - cmd->cmdptr) < 4) {
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cmd->error = 1;
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return 0;
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}
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value = *((u32 *)cmd->cmdptr);
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cmd->cmdptr += 4;
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return value;
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}
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static const void* pmf_next_blob(struct pmf_cmd *cmd, int count)
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{
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const void *value;
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if ((cmd->cmdend - cmd->cmdptr) < count) {
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cmd->error = 1;
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return NULL;
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}
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value = cmd->cmdptr;
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cmd->cmdptr += count;
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return value;
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}
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/*
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* Individual command parsers
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*/
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#define PMF_PARSE_CALL(name, cmd, handlers, p...) \
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do { \
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if (cmd->error) \
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return -ENXIO; \
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if (handlers == NULL) \
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return 0; \
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if (handlers->name) \
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return handlers->name(cmd->func, cmd->instdata, \
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cmd->args, p); \
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return -1; \
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} while(0) \
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static int pmf_parser_write_gpio(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u8 value = (u8)pmf_next32(cmd);
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u8 mask = (u8)pmf_next32(cmd);
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LOG_PARSE("pmf: write_gpio(value: %02x, mask: %02x)\n", value, mask);
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PMF_PARSE_CALL(write_gpio, cmd, h, value, mask);
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}
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static int pmf_parser_read_gpio(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u8 mask = (u8)pmf_next32(cmd);
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int rshift = (int)pmf_next32(cmd);
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u8 xor = (u8)pmf_next32(cmd);
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LOG_PARSE("pmf: read_gpio(mask: %02x, rshift: %d, xor: %02x)\n",
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mask, rshift, xor);
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PMF_PARSE_CALL(read_gpio, cmd, h, mask, rshift, xor);
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}
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static int pmf_parser_write_reg32(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 offset = pmf_next32(cmd);
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u32 value = pmf_next32(cmd);
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u32 mask = pmf_next32(cmd);
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LOG_PARSE("pmf: write_reg32(offset: %08x, value: %08x, mask: %08x)\n",
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offset, value, mask);
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PMF_PARSE_CALL(write_reg32, cmd, h, offset, value, mask);
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}
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static int pmf_parser_read_reg32(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 offset = pmf_next32(cmd);
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LOG_PARSE("pmf: read_reg32(offset: %08x)\n", offset);
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PMF_PARSE_CALL(read_reg32, cmd, h, offset);
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}
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static int pmf_parser_write_reg16(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 offset = pmf_next32(cmd);
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u16 value = (u16)pmf_next32(cmd);
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u16 mask = (u16)pmf_next32(cmd);
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LOG_PARSE("pmf: write_reg16(offset: %08x, value: %04x, mask: %04x)\n",
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offset, value, mask);
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PMF_PARSE_CALL(write_reg16, cmd, h, offset, value, mask);
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}
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static int pmf_parser_read_reg16(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 offset = pmf_next32(cmd);
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LOG_PARSE("pmf: read_reg16(offset: %08x)\n", offset);
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PMF_PARSE_CALL(read_reg16, cmd, h, offset);
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}
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static int pmf_parser_write_reg8(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 offset = pmf_next32(cmd);
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u8 value = (u16)pmf_next32(cmd);
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u8 mask = (u16)pmf_next32(cmd);
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LOG_PARSE("pmf: write_reg8(offset: %08x, value: %02x, mask: %02x)\n",
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offset, value, mask);
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PMF_PARSE_CALL(write_reg8, cmd, h, offset, value, mask);
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}
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static int pmf_parser_read_reg8(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 offset = pmf_next32(cmd);
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LOG_PARSE("pmf: read_reg8(offset: %08x)\n", offset);
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PMF_PARSE_CALL(read_reg8, cmd, h, offset);
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}
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static int pmf_parser_delay(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 duration = pmf_next32(cmd);
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LOG_PARSE("pmf: delay(duration: %d us)\n", duration);
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PMF_PARSE_CALL(delay, cmd, h, duration);
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}
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static int pmf_parser_wait_reg32(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 offset = pmf_next32(cmd);
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u32 value = pmf_next32(cmd);
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u32 mask = pmf_next32(cmd);
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LOG_PARSE("pmf: wait_reg32(offset: %08x, comp_value: %08x,mask: %08x)\n",
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offset, value, mask);
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PMF_PARSE_CALL(wait_reg32, cmd, h, offset, value, mask);
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}
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static int pmf_parser_wait_reg16(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 offset = pmf_next32(cmd);
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u16 value = (u16)pmf_next32(cmd);
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u16 mask = (u16)pmf_next32(cmd);
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LOG_PARSE("pmf: wait_reg16(offset: %08x, comp_value: %04x,mask: %04x)\n",
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offset, value, mask);
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PMF_PARSE_CALL(wait_reg16, cmd, h, offset, value, mask);
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}
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static int pmf_parser_wait_reg8(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 offset = pmf_next32(cmd);
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u8 value = (u8)pmf_next32(cmd);
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u8 mask = (u8)pmf_next32(cmd);
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LOG_PARSE("pmf: wait_reg8(offset: %08x, comp_value: %02x,mask: %02x)\n",
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offset, value, mask);
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PMF_PARSE_CALL(wait_reg8, cmd, h, offset, value, mask);
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}
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static int pmf_parser_read_i2c(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 bytes = pmf_next32(cmd);
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LOG_PARSE("pmf: read_i2c(bytes: %ud)\n", bytes);
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PMF_PARSE_CALL(read_i2c, cmd, h, bytes);
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}
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static int pmf_parser_write_i2c(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 bytes = pmf_next32(cmd);
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const void *blob = pmf_next_blob(cmd, bytes);
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LOG_PARSE("pmf: write_i2c(bytes: %ud) ...\n", bytes);
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LOG_BLOB("pmf: data: \n", blob, bytes);
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PMF_PARSE_CALL(write_i2c, cmd, h, bytes, blob);
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}
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static int pmf_parser_rmw_i2c(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 maskbytes = pmf_next32(cmd);
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u32 valuesbytes = pmf_next32(cmd);
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u32 totalbytes = pmf_next32(cmd);
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const void *maskblob = pmf_next_blob(cmd, maskbytes);
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const void *valuesblob = pmf_next_blob(cmd, valuesbytes);
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LOG_PARSE("pmf: rmw_i2c(maskbytes: %ud, valuebytes: %ud, "
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"totalbytes: %d) ...\n",
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maskbytes, valuesbytes, totalbytes);
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LOG_BLOB("pmf: mask data: \n", maskblob, maskbytes);
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LOG_BLOB("pmf: values data: \n", valuesblob, valuesbytes);
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PMF_PARSE_CALL(rmw_i2c, cmd, h, maskbytes, valuesbytes, totalbytes,
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maskblob, valuesblob);
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}
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static int pmf_parser_read_cfg(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 offset = pmf_next32(cmd);
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u32 bytes = pmf_next32(cmd);
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LOG_PARSE("pmf: read_cfg(offset: %x, bytes: %ud)\n", offset, bytes);
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PMF_PARSE_CALL(read_cfg, cmd, h, offset, bytes);
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}
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static int pmf_parser_write_cfg(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 offset = pmf_next32(cmd);
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u32 bytes = pmf_next32(cmd);
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const void *blob = pmf_next_blob(cmd, bytes);
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LOG_PARSE("pmf: write_cfg(offset: %x, bytes: %ud)\n", offset, bytes);
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LOG_BLOB("pmf: data: \n", blob, bytes);
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PMF_PARSE_CALL(write_cfg, cmd, h, offset, bytes, blob);
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}
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static int pmf_parser_rmw_cfg(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 offset = pmf_next32(cmd);
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u32 maskbytes = pmf_next32(cmd);
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u32 valuesbytes = pmf_next32(cmd);
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u32 totalbytes = pmf_next32(cmd);
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const void *maskblob = pmf_next_blob(cmd, maskbytes);
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const void *valuesblob = pmf_next_blob(cmd, valuesbytes);
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LOG_PARSE("pmf: rmw_cfg(maskbytes: %ud, valuebytes: %ud,"
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" totalbytes: %d) ...\n",
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maskbytes, valuesbytes, totalbytes);
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LOG_BLOB("pmf: mask data: \n", maskblob, maskbytes);
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LOG_BLOB("pmf: values data: \n", valuesblob, valuesbytes);
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PMF_PARSE_CALL(rmw_cfg, cmd, h, offset, maskbytes, valuesbytes,
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totalbytes, maskblob, valuesblob);
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}
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static int pmf_parser_read_i2c_sub(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u8 subaddr = (u8)pmf_next32(cmd);
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u32 bytes = pmf_next32(cmd);
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LOG_PARSE("pmf: read_i2c_sub(subaddr: %x, bytes: %ud)\n",
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subaddr, bytes);
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PMF_PARSE_CALL(read_i2c_sub, cmd, h, subaddr, bytes);
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}
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static int pmf_parser_write_i2c_sub(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u8 subaddr = (u8)pmf_next32(cmd);
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u32 bytes = pmf_next32(cmd);
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const void *blob = pmf_next_blob(cmd, bytes);
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LOG_PARSE("pmf: write_i2c_sub(subaddr: %x, bytes: %ud) ...\n",
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subaddr, bytes);
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LOG_BLOB("pmf: data: \n", blob, bytes);
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PMF_PARSE_CALL(write_i2c_sub, cmd, h, subaddr, bytes, blob);
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}
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static int pmf_parser_set_i2c_mode(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u32 mode = pmf_next32(cmd);
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LOG_PARSE("pmf: set_i2c_mode(mode: %d)\n", mode);
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PMF_PARSE_CALL(set_i2c_mode, cmd, h, mode);
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}
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static int pmf_parser_rmw_i2c_sub(struct pmf_cmd *cmd, struct pmf_handlers *h)
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{
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u8 subaddr = (u8)pmf_next32(cmd);
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u32 maskbytes = pmf_next32(cmd);
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u32 valuesbytes = pmf_next32(cmd);
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u32 totalbytes = pmf_next32(cmd);
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const void *maskblob = pmf_next_blob(cmd, maskbytes);
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const void *valuesblob = pmf_next_blob(cmd, valuesbytes);
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LOG_PARSE("pmf: rmw_i2c_sub(subaddr: %x, maskbytes: %ud, valuebytes: %ud"
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", totalbytes: %d) ...\n",
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subaddr, maskbytes, valuesbytes, totalbytes);
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LOG_BLOB("pmf: mask data: \n", maskblob, maskbytes);
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LOG_BLOB("pmf: values data: \n", valuesblob, valuesbytes);
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PMF_PARSE_CALL(rmw_i2c_sub, cmd, h, subaddr, maskbytes, valuesbytes,
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totalbytes, maskblob, valuesblob);
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}
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static int pmf_parser_read_reg32_msrx(struct pmf_cmd *cmd,
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struct pmf_handlers *h)
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{
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u32 offset = pmf_next32(cmd);
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u32 mask = pmf_next32(cmd);
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u32 shift = pmf_next32(cmd);
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u32 xor = pmf_next32(cmd);
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LOG_PARSE("pmf: read_reg32_msrx(offset: %x, mask: %x, shift: %x,"
|
|
" xor: %x\n", offset, mask, shift, xor);
|
|
|
|
PMF_PARSE_CALL(read_reg32_msrx, cmd, h, offset, mask, shift, xor);
|
|
}
|
|
|
|
static int pmf_parser_read_reg16_msrx(struct pmf_cmd *cmd,
|
|
struct pmf_handlers *h)
|
|
{
|
|
u32 offset = pmf_next32(cmd);
|
|
u32 mask = pmf_next32(cmd);
|
|
u32 shift = pmf_next32(cmd);
|
|
u32 xor = pmf_next32(cmd);
|
|
|
|
LOG_PARSE("pmf: read_reg16_msrx(offset: %x, mask: %x, shift: %x,"
|
|
" xor: %x\n", offset, mask, shift, xor);
|
|
|
|
PMF_PARSE_CALL(read_reg16_msrx, cmd, h, offset, mask, shift, xor);
|
|
}
|
|
static int pmf_parser_read_reg8_msrx(struct pmf_cmd *cmd,
|
|
struct pmf_handlers *h)
|
|
{
|
|
u32 offset = pmf_next32(cmd);
|
|
u32 mask = pmf_next32(cmd);
|
|
u32 shift = pmf_next32(cmd);
|
|
u32 xor = pmf_next32(cmd);
|
|
|
|
LOG_PARSE("pmf: read_reg8_msrx(offset: %x, mask: %x, shift: %x,"
|
|
" xor: %x\n", offset, mask, shift, xor);
|
|
|
|
PMF_PARSE_CALL(read_reg8_msrx, cmd, h, offset, mask, shift, xor);
|
|
}
|
|
|
|
static int pmf_parser_write_reg32_slm(struct pmf_cmd *cmd,
|
|
struct pmf_handlers *h)
|
|
{
|
|
u32 offset = pmf_next32(cmd);
|
|
u32 shift = pmf_next32(cmd);
|
|
u32 mask = pmf_next32(cmd);
|
|
|
|
LOG_PARSE("pmf: write_reg32_slm(offset: %x, shift: %x, mask: %x\n",
|
|
offset, shift, mask);
|
|
|
|
PMF_PARSE_CALL(write_reg32_slm, cmd, h, offset, shift, mask);
|
|
}
|
|
|
|
static int pmf_parser_write_reg16_slm(struct pmf_cmd *cmd,
|
|
struct pmf_handlers *h)
|
|
{
|
|
u32 offset = pmf_next32(cmd);
|
|
u32 shift = pmf_next32(cmd);
|
|
u32 mask = pmf_next32(cmd);
|
|
|
|
LOG_PARSE("pmf: write_reg16_slm(offset: %x, shift: %x, mask: %x\n",
|
|
offset, shift, mask);
|
|
|
|
PMF_PARSE_CALL(write_reg16_slm, cmd, h, offset, shift, mask);
|
|
}
|
|
|
|
static int pmf_parser_write_reg8_slm(struct pmf_cmd *cmd,
|
|
struct pmf_handlers *h)
|
|
{
|
|
u32 offset = pmf_next32(cmd);
|
|
u32 shift = pmf_next32(cmd);
|
|
u32 mask = pmf_next32(cmd);
|
|
|
|
LOG_PARSE("pmf: write_reg8_slm(offset: %x, shift: %x, mask: %x\n",
|
|
offset, shift, mask);
|
|
|
|
PMF_PARSE_CALL(write_reg8_slm, cmd, h, offset, shift, mask);
|
|
}
|
|
|
|
static int pmf_parser_mask_and_compare(struct pmf_cmd *cmd,
|
|
struct pmf_handlers *h)
|
|
{
|
|
u32 bytes = pmf_next32(cmd);
|
|
const void *maskblob = pmf_next_blob(cmd, bytes);
|
|
const void *valuesblob = pmf_next_blob(cmd, bytes);
|
|
|
|
LOG_PARSE("pmf: mask_and_compare(length: %ud ...\n", bytes);
|
|
LOG_BLOB("pmf: mask data: \n", maskblob, bytes);
|
|
LOG_BLOB("pmf: values data: \n", valuesblob, bytes);
|
|
|
|
PMF_PARSE_CALL(mask_and_compare, cmd, h,
|
|
bytes, maskblob, valuesblob);
|
|
}
|
|
|
|
|
|
typedef int (*pmf_cmd_parser_t)(struct pmf_cmd *cmd, struct pmf_handlers *h);
|
|
|
|
static pmf_cmd_parser_t pmf_parsers[PMF_CMD_COUNT] =
|
|
{
|
|
NULL,
|
|
pmf_parser_write_gpio,
|
|
pmf_parser_read_gpio,
|
|
pmf_parser_write_reg32,
|
|
pmf_parser_read_reg32,
|
|
pmf_parser_write_reg16,
|
|
pmf_parser_read_reg16,
|
|
pmf_parser_write_reg8,
|
|
pmf_parser_read_reg8,
|
|
pmf_parser_delay,
|
|
pmf_parser_wait_reg32,
|
|
pmf_parser_wait_reg16,
|
|
pmf_parser_wait_reg8,
|
|
pmf_parser_read_i2c,
|
|
pmf_parser_write_i2c,
|
|
pmf_parser_rmw_i2c,
|
|
NULL, /* Bogus command */
|
|
NULL, /* Shift bytes right: NYI */
|
|
NULL, /* Shift bytes left: NYI */
|
|
pmf_parser_read_cfg,
|
|
pmf_parser_write_cfg,
|
|
pmf_parser_rmw_cfg,
|
|
pmf_parser_read_i2c_sub,
|
|
pmf_parser_write_i2c_sub,
|
|
pmf_parser_set_i2c_mode,
|
|
pmf_parser_rmw_i2c_sub,
|
|
pmf_parser_read_reg32_msrx,
|
|
pmf_parser_read_reg16_msrx,
|
|
pmf_parser_read_reg8_msrx,
|
|
pmf_parser_write_reg32_slm,
|
|
pmf_parser_write_reg16_slm,
|
|
pmf_parser_write_reg8_slm,
|
|
pmf_parser_mask_and_compare,
|
|
};
|
|
|
|
struct pmf_device {
|
|
struct list_head link;
|
|
struct device_node *node;
|
|
struct pmf_handlers *handlers;
|
|
struct list_head functions;
|
|
struct kref ref;
|
|
};
|
|
|
|
static LIST_HEAD(pmf_devices);
|
|
static DEFINE_SPINLOCK(pmf_lock);
|
|
static DEFINE_MUTEX(pmf_irq_mutex);
|
|
|
|
static void pmf_release_device(struct kref *kref)
|
|
{
|
|
struct pmf_device *dev = container_of(kref, struct pmf_device, ref);
|
|
kfree(dev);
|
|
}
|
|
|
|
static inline void pmf_put_device(struct pmf_device *dev)
|
|
{
|
|
kref_put(&dev->ref, pmf_release_device);
|
|
}
|
|
|
|
static inline struct pmf_device *pmf_get_device(struct pmf_device *dev)
|
|
{
|
|
kref_get(&dev->ref);
|
|
return dev;
|
|
}
|
|
|
|
static inline struct pmf_device *pmf_find_device(struct device_node *np)
|
|
{
|
|
struct pmf_device *dev;
|
|
|
|
list_for_each_entry(dev, &pmf_devices, link) {
|
|
if (dev->node == np)
|
|
return pmf_get_device(dev);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static int pmf_parse_one(struct pmf_function *func,
|
|
struct pmf_handlers *handlers,
|
|
void *instdata, struct pmf_args *args)
|
|
{
|
|
struct pmf_cmd cmd;
|
|
u32 ccode;
|
|
int count, rc;
|
|
|
|
cmd.cmdptr = func->data;
|
|
cmd.cmdend = func->data + func->length;
|
|
cmd.func = func;
|
|
cmd.instdata = instdata;
|
|
cmd.args = args;
|
|
cmd.error = 0;
|
|
|
|
LOG_PARSE("pmf: func %s, %d bytes, %s...\n",
|
|
func->name, func->length,
|
|
handlers ? "executing" : "parsing");
|
|
|
|
/* One subcommand to parse for now */
|
|
count = 1;
|
|
|
|
while(count-- && cmd.cmdptr < cmd.cmdend) {
|
|
/* Get opcode */
|
|
ccode = pmf_next32(&cmd);
|
|
/* Check if we are hitting a command list, fetch new count */
|
|
if (ccode == 0) {
|
|
count = pmf_next32(&cmd) - 1;
|
|
ccode = pmf_next32(&cmd);
|
|
}
|
|
if (cmd.error) {
|
|
LOG_ERROR("pmf: parse error, not enough data\n");
|
|
return -ENXIO;
|
|
}
|
|
if (ccode >= PMF_CMD_COUNT) {
|
|
LOG_ERROR("pmf: command code %d unknown !\n", ccode);
|
|
return -ENXIO;
|
|
}
|
|
if (pmf_parsers[ccode] == NULL) {
|
|
LOG_ERROR("pmf: no parser for command %d !\n", ccode);
|
|
return -ENXIO;
|
|
}
|
|
rc = pmf_parsers[ccode](&cmd, handlers);
|
|
if (rc != 0) {
|
|
LOG_ERROR("pmf: parser for command %d returned"
|
|
" error %d\n", ccode, rc);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
/* We are doing an initial parse pass, we need to adjust the size */
|
|
if (handlers == NULL)
|
|
func->length = cmd.cmdptr - func->data;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pmf_add_function_prop(struct pmf_device *dev, void *driverdata,
|
|
const char *name, u32 *data,
|
|
unsigned int length)
|
|
{
|
|
int count = 0;
|
|
struct pmf_function *func = NULL;
|
|
|
|
DBG("pmf: Adding functions for platform-do-%s\n", name);
|
|
|
|
while (length >= 12) {
|
|
/* Allocate a structure */
|
|
func = kzalloc(sizeof(struct pmf_function), GFP_KERNEL);
|
|
if (func == NULL)
|
|
goto bail;
|
|
kref_init(&func->ref);
|
|
INIT_LIST_HEAD(&func->irq_clients);
|
|
func->node = dev->node;
|
|
func->driver_data = driverdata;
|
|
func->name = name;
|
|
func->phandle = data[0];
|
|
func->flags = data[1];
|
|
data += 2;
|
|
length -= 8;
|
|
func->data = data;
|
|
func->length = length;
|
|
func->dev = dev;
|
|
DBG("pmf: idx %d: flags=%08x, phandle=%08x "
|
|
" %d bytes remaining, parsing...\n",
|
|
count+1, func->flags, func->phandle, length);
|
|
if (pmf_parse_one(func, NULL, NULL, NULL)) {
|
|
kfree(func);
|
|
goto bail;
|
|
}
|
|
length -= func->length;
|
|
data = (u32 *)(((u8 *)data) + func->length);
|
|
list_add(&func->link, &dev->functions);
|
|
pmf_get_device(dev);
|
|
count++;
|
|
}
|
|
bail:
|
|
DBG("pmf: Added %d functions\n", count);
|
|
|
|
return count;
|
|
}
|
|
|
|
static int pmf_add_functions(struct pmf_device *dev, void *driverdata)
|
|
{
|
|
struct property *pp;
|
|
#define PP_PREFIX "platform-do-"
|
|
const int plen = strlen(PP_PREFIX);
|
|
int count = 0;
|
|
|
|
for (pp = dev->node->properties; pp != 0; pp = pp->next) {
|
|
char *name;
|
|
if (strncmp(pp->name, PP_PREFIX, plen) != 0)
|
|
continue;
|
|
name = pp->name + plen;
|
|
if (strlen(name) && pp->length >= 12)
|
|
count += pmf_add_function_prop(dev, driverdata, name,
|
|
pp->value, pp->length);
|
|
}
|
|
return count;
|
|
}
|
|
|
|
|
|
int pmf_register_driver(struct device_node *np,
|
|
struct pmf_handlers *handlers,
|
|
void *driverdata)
|
|
{
|
|
struct pmf_device *dev;
|
|
unsigned long flags;
|
|
int rc = 0;
|
|
|
|
if (handlers == NULL)
|
|
return -EINVAL;
|
|
|
|
DBG("pmf: registering driver for node %s\n", np->full_name);
|
|
|
|
spin_lock_irqsave(&pmf_lock, flags);
|
|
dev = pmf_find_device(np);
|
|
spin_unlock_irqrestore(&pmf_lock, flags);
|
|
if (dev != NULL) {
|
|
DBG("pmf: already there !\n");
|
|
pmf_put_device(dev);
|
|
return -EBUSY;
|
|
}
|
|
|
|
dev = kzalloc(sizeof(struct pmf_device), GFP_KERNEL);
|
|
if (dev == NULL) {
|
|
DBG("pmf: no memory !\n");
|
|
return -ENOMEM;
|
|
}
|
|
kref_init(&dev->ref);
|
|
dev->node = of_node_get(np);
|
|
dev->handlers = handlers;
|
|
INIT_LIST_HEAD(&dev->functions);
|
|
|
|
rc = pmf_add_functions(dev, driverdata);
|
|
if (rc == 0) {
|
|
DBG("pmf: no functions, disposing.. \n");
|
|
of_node_put(np);
|
|
kfree(dev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
spin_lock_irqsave(&pmf_lock, flags);
|
|
list_add(&dev->link, &pmf_devices);
|
|
spin_unlock_irqrestore(&pmf_lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmf_register_driver);
|
|
|
|
struct pmf_function *pmf_get_function(struct pmf_function *func)
|
|
{
|
|
if (!try_module_get(func->dev->handlers->owner))
|
|
return NULL;
|
|
kref_get(&func->ref);
|
|
return func;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmf_get_function);
|
|
|
|
static void pmf_release_function(struct kref *kref)
|
|
{
|
|
struct pmf_function *func =
|
|
container_of(kref, struct pmf_function, ref);
|
|
pmf_put_device(func->dev);
|
|
kfree(func);
|
|
}
|
|
|
|
static inline void __pmf_put_function(struct pmf_function *func)
|
|
{
|
|
kref_put(&func->ref, pmf_release_function);
|
|
}
|
|
|
|
void pmf_put_function(struct pmf_function *func)
|
|
{
|
|
if (func == NULL)
|
|
return;
|
|
module_put(func->dev->handlers->owner);
|
|
__pmf_put_function(func);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmf_put_function);
|
|
|
|
void pmf_unregister_driver(struct device_node *np)
|
|
{
|
|
struct pmf_device *dev;
|
|
unsigned long flags;
|
|
|
|
DBG("pmf: unregistering driver for node %s\n", np->full_name);
|
|
|
|
spin_lock_irqsave(&pmf_lock, flags);
|
|
dev = pmf_find_device(np);
|
|
if (dev == NULL) {
|
|
DBG("pmf: not such driver !\n");
|
|
spin_unlock_irqrestore(&pmf_lock, flags);
|
|
return;
|
|
}
|
|
list_del(&dev->link);
|
|
|
|
while(!list_empty(&dev->functions)) {
|
|
struct pmf_function *func =
|
|
list_entry(dev->functions.next, typeof(*func), link);
|
|
list_del(&func->link);
|
|
__pmf_put_function(func);
|
|
}
|
|
|
|
pmf_put_device(dev);
|
|
spin_unlock_irqrestore(&pmf_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmf_unregister_driver);
|
|
|
|
struct pmf_function *__pmf_find_function(struct device_node *target,
|
|
const char *name, u32 flags)
|
|
{
|
|
struct device_node *actor = of_node_get(target);
|
|
struct pmf_device *dev;
|
|
struct pmf_function *func, *result = NULL;
|
|
char fname[64];
|
|
const u32 *prop;
|
|
u32 ph;
|
|
|
|
/*
|
|
* Look for a "platform-*" function reference. If we can't find
|
|
* one, then we fallback to a direct call attempt
|
|
*/
|
|
snprintf(fname, 63, "platform-%s", name);
|
|
prop = of_get_property(target, fname, NULL);
|
|
if (prop == NULL)
|
|
goto find_it;
|
|
ph = *prop;
|
|
if (ph == 0)
|
|
goto find_it;
|
|
|
|
/*
|
|
* Ok, now try to find the actor. If we can't find it, we fail,
|
|
* there is no point in falling back there
|
|
*/
|
|
of_node_put(actor);
|
|
actor = of_find_node_by_phandle(ph);
|
|
if (actor == NULL)
|
|
return NULL;
|
|
find_it:
|
|
dev = pmf_find_device(actor);
|
|
if (dev == NULL)
|
|
return NULL;
|
|
|
|
list_for_each_entry(func, &dev->functions, link) {
|
|
if (name && strcmp(name, func->name))
|
|
continue;
|
|
if (func->phandle && target->phandle != func->phandle)
|
|
continue;
|
|
if ((func->flags & flags) == 0)
|
|
continue;
|
|
result = func;
|
|
break;
|
|
}
|
|
of_node_put(actor);
|
|
pmf_put_device(dev);
|
|
return result;
|
|
}
|
|
|
|
|
|
int pmf_register_irq_client(struct device_node *target,
|
|
const char *name,
|
|
struct pmf_irq_client *client)
|
|
{
|
|
struct pmf_function *func;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&pmf_lock, flags);
|
|
func = __pmf_find_function(target, name, PMF_FLAGS_INT_GEN);
|
|
if (func)
|
|
func = pmf_get_function(func);
|
|
spin_unlock_irqrestore(&pmf_lock, flags);
|
|
if (func == NULL)
|
|
return -ENODEV;
|
|
|
|
/* guard against manipulations of list */
|
|
mutex_lock(&pmf_irq_mutex);
|
|
if (list_empty(&func->irq_clients))
|
|
func->dev->handlers->irq_enable(func);
|
|
|
|
/* guard against pmf_do_irq while changing list */
|
|
spin_lock_irqsave(&pmf_lock, flags);
|
|
list_add(&client->link, &func->irq_clients);
|
|
spin_unlock_irqrestore(&pmf_lock, flags);
|
|
|
|
client->func = func;
|
|
mutex_unlock(&pmf_irq_mutex);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmf_register_irq_client);
|
|
|
|
void pmf_unregister_irq_client(struct pmf_irq_client *client)
|
|
{
|
|
struct pmf_function *func = client->func;
|
|
unsigned long flags;
|
|
|
|
BUG_ON(func == NULL);
|
|
|
|
/* guard against manipulations of list */
|
|
mutex_lock(&pmf_irq_mutex);
|
|
client->func = NULL;
|
|
|
|
/* guard against pmf_do_irq while changing list */
|
|
spin_lock_irqsave(&pmf_lock, flags);
|
|
list_del(&client->link);
|
|
spin_unlock_irqrestore(&pmf_lock, flags);
|
|
|
|
if (list_empty(&func->irq_clients))
|
|
func->dev->handlers->irq_disable(func);
|
|
mutex_unlock(&pmf_irq_mutex);
|
|
pmf_put_function(func);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmf_unregister_irq_client);
|
|
|
|
|
|
void pmf_do_irq(struct pmf_function *func)
|
|
{
|
|
unsigned long flags;
|
|
struct pmf_irq_client *client;
|
|
|
|
/* For now, using a spinlock over the whole function. Can be made
|
|
* to drop the lock using 2 lists if necessary
|
|
*/
|
|
spin_lock_irqsave(&pmf_lock, flags);
|
|
list_for_each_entry(client, &func->irq_clients, link) {
|
|
if (!try_module_get(client->owner))
|
|
continue;
|
|
client->handler(client->data);
|
|
module_put(client->owner);
|
|
}
|
|
spin_unlock_irqrestore(&pmf_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmf_do_irq);
|
|
|
|
|
|
int pmf_call_one(struct pmf_function *func, struct pmf_args *args)
|
|
{
|
|
struct pmf_device *dev = func->dev;
|
|
void *instdata = NULL;
|
|
int rc = 0;
|
|
|
|
DBG(" ** pmf_call_one(%s/%s) **\n", dev->node->full_name, func->name);
|
|
|
|
if (dev->handlers->begin)
|
|
instdata = dev->handlers->begin(func, args);
|
|
rc = pmf_parse_one(func, dev->handlers, instdata, args);
|
|
if (dev->handlers->end)
|
|
dev->handlers->end(func, instdata);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmf_call_one);
|
|
|
|
int pmf_do_functions(struct device_node *np, const char *name,
|
|
u32 phandle, u32 fflags, struct pmf_args *args)
|
|
{
|
|
struct pmf_device *dev;
|
|
struct pmf_function *func, *tmp;
|
|
unsigned long flags;
|
|
int rc = -ENODEV;
|
|
|
|
spin_lock_irqsave(&pmf_lock, flags);
|
|
|
|
dev = pmf_find_device(np);
|
|
if (dev == NULL) {
|
|
spin_unlock_irqrestore(&pmf_lock, flags);
|
|
return -ENODEV;
|
|
}
|
|
list_for_each_entry_safe(func, tmp, &dev->functions, link) {
|
|
if (name && strcmp(name, func->name))
|
|
continue;
|
|
if (phandle && func->phandle && phandle != func->phandle)
|
|
continue;
|
|
if ((func->flags & fflags) == 0)
|
|
continue;
|
|
if (pmf_get_function(func) == NULL)
|
|
continue;
|
|
spin_unlock_irqrestore(&pmf_lock, flags);
|
|
rc = pmf_call_one(func, args);
|
|
pmf_put_function(func);
|
|
spin_lock_irqsave(&pmf_lock, flags);
|
|
}
|
|
pmf_put_device(dev);
|
|
spin_unlock_irqrestore(&pmf_lock, flags);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmf_do_functions);
|
|
|
|
|
|
struct pmf_function *pmf_find_function(struct device_node *target,
|
|
const char *name)
|
|
{
|
|
struct pmf_function *func;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&pmf_lock, flags);
|
|
func = __pmf_find_function(target, name, PMF_FLAGS_ON_DEMAND);
|
|
if (func)
|
|
func = pmf_get_function(func);
|
|
spin_unlock_irqrestore(&pmf_lock, flags);
|
|
return func;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmf_find_function);
|
|
|
|
int pmf_call_function(struct device_node *target, const char *name,
|
|
struct pmf_args *args)
|
|
{
|
|
struct pmf_function *func = pmf_find_function(target, name);
|
|
int rc;
|
|
|
|
if (func == NULL)
|
|
return -ENODEV;
|
|
|
|
rc = pmf_call_one(func, args);
|
|
pmf_put_function(func);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmf_call_function);
|
|
|