Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933674Ab0GUIcZ (ORCPT ); Wed, 21 Jul 2010 04:32:25 -0400 Received: from mail-px0-f174.google.com ([209.85.212.174]:49267 "EHLO mail-px0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762850Ab0GUIcV (ORCPT ); Wed, 21 Jul 2010 04:32:21 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=GDjdYu0l/brIwg0dYmMi/BSAaeI6FnAwmyKrBzmjscG5skMSp2I5P2NSszjrh0s/B2 aZPL8HwC3rBugpEhR93WpPE0eBCmb3UwWq7OBLZliEMWxRrghORrx16Z0o0NBrhbEH1Q ZVvo0SRvdA5Qp6FYjxWmAvvDF2Yun/eSYRA3Q= Date: Wed, 21 Jul 2010 01:32:17 -0700 From: Dmitry Torokhov To: Daniel Mack Cc: linux-kernel@vger.kernel.org, linux-input@vger.kernel.org Subject: Re: [PATCH 4/4] input: dynamically allocate ABS information Message-ID: <20100721083216.GC21558@core.coreip.homeip.net> References: <1274289757-2723-1-git-send-email-daniel@caiaq.de> <1274289757-2723-5-git-send-email-daniel@caiaq.de> <20100524160805.GO30801@buzzloop.caiaq.de> <20100524161527.GC3182@core.coreip.homeip.net> <20100616083903.GU17833@buzzloop.caiaq.de> <20100721083048.GA21558@core.coreip.homeip.net> <20100721083150.GB21558@core.coreip.homeip.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100721083150.GB21558@core.coreip.homeip.net> User-Agent: Mutt/1.5.20 (2009-12-10) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8213 Lines: 251 Input: dynamically allocate ABS information From: Daniel Mack As all callers are now changed to only use the input_abs_*() access helpers, switching over to dynamically allocated ABS information is easy. Signed-off-by: Daniel Mack Signed-off-by: Dmitry Torokhov --- drivers/input/evdev.c | 13 +++-------- drivers/input/input.c | 42 ++++++++++++++++++++++++++++++++++-- include/linux/input.h | 57 +++++++++++++++---------------------------------- 3 files changed, 62 insertions(+), 50 deletions(-) diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index 9807c8f..251f142 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -691,6 +691,9 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, sizeof(struct input_absinfo)))) return -EFAULT; + if (_IOC_SIZE(cmd) < sizeof(struct input_absinfo)) + abs.resolution = 0; + /* We can't change number of reserved MT slots */ if (t == ABS_MT_SLOT) return -EINVAL; @@ -701,15 +704,7 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, * of event. */ spin_lock_irq(&dev->event_lock); - - input_abs_set_val(dev, t, abs.value); - input_abs_set_min(dev, t, abs.minimum); - input_abs_set_max(dev, t, abs.maximum); - input_abs_set_fuzz(dev, t, abs.fuzz); - input_abs_set_flat(dev, t, abs.flat); - input_abs_set_res(dev, t, _IOC_SIZE(cmd) < sizeof(struct input_absinfo) ? - 0 : abs.resolution); - + dev->absinfo[t] = abs; spin_unlock_irq(&dev->event_lock); return 0; diff --git a/drivers/input/input.c b/drivers/input/input.c index 7259adb..d7fd077 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -182,7 +182,7 @@ static int input_handle_abs_event(struct input_dev *dev, is_mt_event = code >= ABS_MT_FIRST && code <= ABS_MT_LAST; if (!is_mt_event) { - pold = &dev->abs[code]; + pold = &dev->absinfo[code].value; } else if (dev->mt) { struct input_mt_slot *mtslot = &dev->mt[dev->slot]; pold = &mtslot->abs[code - ABS_MT_FIRST]; @@ -196,7 +196,7 @@ static int input_handle_abs_event(struct input_dev *dev, if (pold) { *pval = input_defuzz_abs_event(*pval, *pold, - dev->absfuzz[code]); + dev->absinfo[code].fuzz); if (*pold == *pval) return INPUT_IGNORE_EVENT; @@ -391,6 +391,43 @@ void input_inject_event(struct input_handle *handle, EXPORT_SYMBOL(input_inject_event); /** + * input_alloc_absinfo - allocates array of input_absinfo structs + * @dev: the input device emitting absolute events + * + * If the absinfo struct the caller asked for is already allocated, this + * functions will not do anything. + */ +void input_alloc_absinfo(struct input_dev *dev) +{ + if (!dev->absinfo) + dev->absinfo = kcalloc(ABS_CNT, sizeof(struct input_absinfo), + GFP_KERNEL); + + WARN(!dev->absinfo, "%s(): kzalloc() failed?\n", __func__); +} +EXPORT_SYMBOL(input_alloc_absinfo); + +void input_set_abs_params(struct input_dev *dev, unsigned int axis, + int min, int max, int fuzz, int flat) +{ + struct input_absinfo *absinfo; + + input_alloc_absinfo(dev); + if (!dev->absinfo) + return; + + absinfo = &dev->absinfo[axis]; + absinfo->minimum = min; + absinfo->maximum = max; + absinfo->fuzz = fuzz; + absinfo->flat = flat; + + dev->absbit[BIT_WORD(axis)] |= BIT_MASK(axis); +} +EXPORT_SYMBOL(input_set_abs_params); + + +/** * input_grab_device - grabs device for exclusive use * @handle: input handle that wants to own the device * @@ -1308,6 +1345,7 @@ static void input_dev_release(struct device *device) input_ff_destroy(dev); input_mt_destroy_slots(dev); + kfree(dev->absinfo); kfree(dev); module_put(THIS_MODULE); diff --git a/include/linux/input.h b/include/linux/input.h index 4a55311..b5bcde6 100644 --- a/include/linux/input.h +++ b/include/linux/input.h @@ -776,6 +776,7 @@ struct input_absinfo { #define REP_DELAY 0x00 #define REP_PERIOD 0x01 #define REP_MAX 0x01 +#define REP_CNT (REP_MAX+1) /* * Sounds @@ -1099,21 +1100,18 @@ struct input_mt_slot { * @repeat_key: stores key code of the last key pressed; used to implement * software autorepeat * @timer: timer for software autorepeat - * @abs: current values for reports from absolute axes * @rep: current values for autorepeat parameters (delay, rate) * @mt: pointer to array of struct input_mt_slot holding current values * of tracked contacts * @mtsize: number of MT slots the device uses * @slot: MT slot currently being transmitted + * @absinfo: array of struct absinfo elements holding information + * about absolute axes (current value, min, max, flat, fuzz, + * resolution) * @key: reflects current state of device's keys/buttons * @led: reflects current state of device's LEDs * @snd: reflects current state of sound effects * @sw: reflects current state of device's switches - * @absmax: maximum values for events coming from absolute axes - * @absmin: minimum values for events coming from absolute axes - * @absfuzz: describes noisiness for axes - * @absflat: size of the center flat position (used by joydev) - * @absres: resolution used for events coming form absolute axes * @open: this method is called when the very first user calls * input_open_device(). The driver must prepare the device * to start generating events (start polling thread, @@ -1180,24 +1178,19 @@ struct input_dev { unsigned int repeat_key; struct timer_list timer; - int abs[ABS_CNT]; - int rep[REP_MAX + 1]; + int rep[REP_CNT]; struct input_mt_slot *mt; int mtsize; int slot; + struct input_absinfo *absinfo; + unsigned long key[BITS_TO_LONGS(KEY_CNT)]; unsigned long led[BITS_TO_LONGS(LED_CNT)]; unsigned long snd[BITS_TO_LONGS(SND_CNT)]; unsigned long sw[BITS_TO_LONGS(SW_CNT)]; - int absmax[ABS_CNT]; - int absmin[ABS_CNT]; - int absfuzz[ABS_CNT]; - int absflat[ABS_CNT]; - int absres[ABS_CNT]; - int (*open)(struct input_dev *dev); void (*close)(struct input_dev *dev); int (*flush)(struct input_dev *dev, struct file *file); @@ -1459,45 +1452,31 @@ static inline void input_set_events_per_packet(struct input_dev *dev, int n_even dev->hint_events_per_packet = n_events; } -static inline void input_set_abs_params(struct input_dev *dev, int axis, int min, int max, int fuzz, int flat) -{ - dev->absmin[axis] = min; - dev->absmax[axis] = max; - dev->absfuzz[axis] = fuzz; - dev->absflat[axis] = flat; - - dev->absbit[BIT_WORD(axis)] |= BIT_MASK(axis); -} +void input_alloc_absinfo(struct input_dev *dev); +void input_set_abs_params(struct input_dev *dev, unsigned int axis, + int min, int max, int fuzz, int flat); #define INPUT_GENERATE_ABS_ACCESSORS(_suffix, _item) \ static inline int input_abs_get_##_suffix(struct input_dev *dev, \ unsigned int axis) \ { \ - return dev->abs##_item[axis]; \ + return dev->absinfo ? dev->absinfo[axis]._item : 0; \ } \ \ static inline void input_abs_set_##_suffix(struct input_dev *dev, \ unsigned int axis, int val) \ { \ - dev->abs##_item[axis] = val; \ + input_alloc_absinfo(dev); \ + if (dev->absinfo) \ + dev->absinfo[axis]._item = val; \ } -INPUT_GENERATE_ABS_ACCESSORS(min, min) -INPUT_GENERATE_ABS_ACCESSORS(max, max) +INPUT_GENERATE_ABS_ACCESSORS(val, value) +INPUT_GENERATE_ABS_ACCESSORS(min, minimum) +INPUT_GENERATE_ABS_ACCESSORS(max, maximum) INPUT_GENERATE_ABS_ACCESSORS(fuzz, fuzz) INPUT_GENERATE_ABS_ACCESSORS(flat, flat) -INPUT_GENERATE_ABS_ACCESSORS(res, res) - -static inline int input_abs_get_val(struct input_dev *dev, unsigned int axis) -{ - return dev->abs[axis]; -} - -static inline void input_abs_set_val(struct input_dev *dev, - unsigned int axis, int val) -{ - dev->abs[axis] = val; -} +INPUT_GENERATE_ABS_ACCESSORS(res, resolution) int input_get_keycode(struct input_dev *dev, unsigned int scancode, unsigned int *keycode); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/