From bad13639a30e1557fbe9d440adc1906673c9de4e Mon Sep 17 00:00:00 2001 From: Ivo van Doorn Date: Sun, 9 Nov 2008 20:47:00 +0100 Subject: [PATCH] rt2x00: Optimize get_duration / get_duration_res We can optimize get_duration and get_duration_res by making them a macro. They are really simple calculation handlers so this doesn't matter much. Often (especially in rt2400pci and rt2500pci, the arguments are hardcoded, and the result value is passed into other hardcoded values. By making the functions a macro GCC can optimize the entire thing much better. Signed-off-by: Ivo van Doorn Signed-off-by: John W. Linville --- drivers/net/wireless/rt2x00/rt2400pci.c | 10 +++---- drivers/net/wireless/rt2x00/rt2500pci.c | 10 +++---- drivers/net/wireless/rt2x00/rt2500usb.c | 2 +- drivers/net/wireless/rt2x00/rt2x00.h | 31 +++++++++------------- drivers/net/wireless/rt2x00/rt2x00config.c | 4 +-- drivers/net/wireless/rt2x00/rt2x00queue.c | 4 +-- 6 files changed, 27 insertions(+), 34 deletions(-) diff --git a/drivers/net/wireless/rt2x00/rt2400pci.c b/drivers/net/wireless/rt2x00/rt2400pci.c index 861577ece71..9bda3889539 100644 --- a/drivers/net/wireless/rt2x00/rt2400pci.c +++ b/drivers/net/wireless/rt2x00/rt2400pci.c @@ -322,7 +322,7 @@ static void rt2400pci_config_intf(struct rt2x00_dev *rt2x00dev, /* * Enable beacon config */ - bcn_preload = PREAMBLE + get_duration(IEEE80211_HEADER, 20); + bcn_preload = PREAMBLE + GET_DURATION(IEEE80211_HEADER, 20); rt2x00pci_register_read(rt2x00dev, BCNCSR1, ®); rt2x00_set_field32(®, BCNCSR1_PRELOAD, bcn_preload); rt2x00pci_register_write(rt2x00dev, BCNCSR1, reg); @@ -367,25 +367,25 @@ static void rt2400pci_config_erp(struct rt2x00_dev *rt2x00dev, rt2x00pci_register_read(rt2x00dev, ARCSR2, ®); rt2x00_set_field32(®, ARCSR2_SIGNAL, 0x00); rt2x00_set_field32(®, ARCSR2_SERVICE, 0x04); - rt2x00_set_field32(®, ARCSR2_LENGTH, get_duration(ACK_SIZE, 10)); + rt2x00_set_field32(®, ARCSR2_LENGTH, GET_DURATION(ACK_SIZE, 10)); rt2x00pci_register_write(rt2x00dev, ARCSR2, reg); rt2x00pci_register_read(rt2x00dev, ARCSR3, ®); rt2x00_set_field32(®, ARCSR3_SIGNAL, 0x01 | preamble_mask); rt2x00_set_field32(®, ARCSR3_SERVICE, 0x04); - rt2x00_set_field32(®, ARCSR2_LENGTH, get_duration(ACK_SIZE, 20)); + rt2x00_set_field32(®, ARCSR2_LENGTH, GET_DURATION(ACK_SIZE, 20)); rt2x00pci_register_write(rt2x00dev, ARCSR3, reg); rt2x00pci_register_read(rt2x00dev, ARCSR4, ®); rt2x00_set_field32(®, ARCSR4_SIGNAL, 0x02 | preamble_mask); rt2x00_set_field32(®, ARCSR4_SERVICE, 0x04); - rt2x00_set_field32(®, ARCSR2_LENGTH, get_duration(ACK_SIZE, 55)); + rt2x00_set_field32(®, ARCSR2_LENGTH, GET_DURATION(ACK_SIZE, 55)); rt2x00pci_register_write(rt2x00dev, ARCSR4, reg); rt2x00pci_register_read(rt2x00dev, ARCSR5, ®); rt2x00_set_field32(®, ARCSR5_SIGNAL, 0x03 | preamble_mask); rt2x00_set_field32(®, ARCSR5_SERVICE, 0x84); - rt2x00_set_field32(®, ARCSR2_LENGTH, get_duration(ACK_SIZE, 110)); + rt2x00_set_field32(®, ARCSR2_LENGTH, GET_DURATION(ACK_SIZE, 110)); rt2x00pci_register_write(rt2x00dev, ARCSR5, reg); rt2x00pci_register_write(rt2x00dev, ARCSR1, erp->basic_rates); diff --git a/drivers/net/wireless/rt2x00/rt2500pci.c b/drivers/net/wireless/rt2x00/rt2500pci.c index e43ff9c7906..885844c1a3c 100644 --- a/drivers/net/wireless/rt2x00/rt2500pci.c +++ b/drivers/net/wireless/rt2x00/rt2500pci.c @@ -327,7 +327,7 @@ static void rt2500pci_config_intf(struct rt2x00_dev *rt2x00dev, /* * Enable beacon config */ - bcn_preload = PREAMBLE + get_duration(IEEE80211_HEADER, 20); + bcn_preload = PREAMBLE + GET_DURATION(IEEE80211_HEADER, 20); rt2x00pci_register_read(rt2x00dev, BCNCSR1, ®); rt2x00_set_field32(®, BCNCSR1_PRELOAD, bcn_preload); rt2x00_set_field32(®, BCNCSR1_BEACON_CWMIN, queue->cw_min); @@ -373,25 +373,25 @@ static void rt2500pci_config_erp(struct rt2x00_dev *rt2x00dev, rt2x00pci_register_read(rt2x00dev, ARCSR2, ®); rt2x00_set_field32(®, ARCSR2_SIGNAL, 0x00); rt2x00_set_field32(®, ARCSR2_SERVICE, 0x04); - rt2x00_set_field32(®, ARCSR2_LENGTH, get_duration(ACK_SIZE, 10)); + rt2x00_set_field32(®, ARCSR2_LENGTH, GET_DURATION(ACK_SIZE, 10)); rt2x00pci_register_write(rt2x00dev, ARCSR2, reg); rt2x00pci_register_read(rt2x00dev, ARCSR3, ®); rt2x00_set_field32(®, ARCSR3_SIGNAL, 0x01 | preamble_mask); rt2x00_set_field32(®, ARCSR3_SERVICE, 0x04); - rt2x00_set_field32(®, ARCSR2_LENGTH, get_duration(ACK_SIZE, 20)); + rt2x00_set_field32(®, ARCSR2_LENGTH, GET_DURATION(ACK_SIZE, 20)); rt2x00pci_register_write(rt2x00dev, ARCSR3, reg); rt2x00pci_register_read(rt2x00dev, ARCSR4, ®); rt2x00_set_field32(®, ARCSR4_SIGNAL, 0x02 | preamble_mask); rt2x00_set_field32(®, ARCSR4_SERVICE, 0x04); - rt2x00_set_field32(®, ARCSR2_LENGTH, get_duration(ACK_SIZE, 55)); + rt2x00_set_field32(®, ARCSR2_LENGTH, GET_DURATION(ACK_SIZE, 55)); rt2x00pci_register_write(rt2x00dev, ARCSR4, reg); rt2x00pci_register_read(rt2x00dev, ARCSR5, ®); rt2x00_set_field32(®, ARCSR5_SIGNAL, 0x03 | preamble_mask); rt2x00_set_field32(®, ARCSR5_SERVICE, 0x84); - rt2x00_set_field32(®, ARCSR2_LENGTH, get_duration(ACK_SIZE, 110)); + rt2x00_set_field32(®, ARCSR2_LENGTH, GET_DURATION(ACK_SIZE, 110)); rt2x00pci_register_write(rt2x00dev, ARCSR5, reg); rt2x00pci_register_write(rt2x00dev, ARCSR1, erp->basic_rates); diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c index 3868e987438..c40c9e706e9 100644 --- a/drivers/net/wireless/rt2x00/rt2500usb.c +++ b/drivers/net/wireless/rt2x00/rt2500usb.c @@ -385,7 +385,7 @@ static void rt2500usb_config_intf(struct rt2x00_dev *rt2x00dev, /* * Enable beacon config */ - bcn_preload = PREAMBLE + get_duration(IEEE80211_HEADER, 20); + bcn_preload = PREAMBLE + GET_DURATION(IEEE80211_HEADER, 20); rt2500usb_register_read(rt2x00dev, TXRX_CSR20, ®); rt2x00_set_field16(®, TXRX_CSR20_OFFSET, bcn_preload >> 6); rt2x00_set_field16(®, TXRX_CSR20_BCN_EXPECT_WINDOW, diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h index 4506f6cfc0c..baccea7184b 100644 --- a/drivers/net/wireless/rt2x00/rt2x00.h +++ b/drivers/net/wireless/rt2x00/rt2x00.h @@ -91,6 +91,16 @@ #define EEPROM(__dev, __msg, __args...) \ DEBUG_PRINTK(__dev, KERN_DEBUG, "EEPROM recovery", __msg, ##__args) +/* + * Duration calculations + * The rate variable passed is: 100kbs. + * To convert from bytes to bits we multiply size with 8, + * then the size is multiplied with 10 to make the + * real rate -> rate argument correction. + */ +#define GET_DURATION(__size, __rate) (((__size) * 8 * 10) / (__rate)) +#define GET_DURATION_RES(__size, __rate)(((__size) * 8 * 10) % (__rate)) + /* * Standard timing and size defines. * These values should follow the ieee80211 specifications. @@ -109,9 +119,9 @@ #define DIFS ( PIFS + SLOT_TIME ) #define SHORT_DIFS ( SHORT_PIFS + SHORT_SLOT_TIME ) #define EIFS ( SIFS + DIFS + \ - (8 * (IEEE80211_HEADER + ACK_SIZE)) ) + GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10) ) #define SHORT_EIFS ( SIFS + SHORT_DIFS + \ - (8 * (IEEE80211_HEADER + ACK_SIZE)) ) + GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10) ) /* * Chipset identification @@ -920,23 +930,6 @@ static inline u16 rt2x00_check_rev(const struct rt2x00_chip *chipset, !!(chipset->rev & 0x0000f)); } -/* - * Duration calculations - * The rate variable passed is: 100kbs. - * To convert from bytes to bits we multiply size with 8, - * then the size is multiplied with 10 to make the - * real rate -> rate argument correction. - */ -static inline u16 get_duration(const unsigned int size, const u8 rate) -{ - return ((size * 8 * 10) / rate); -} - -static inline u16 get_duration_res(const unsigned int size, const u8 rate) -{ - return ((size * 8 * 10) % rate); -} - /** * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes. * @rt2x00dev: Pointer to &struct rt2x00_dev. diff --git a/drivers/net/wireless/rt2x00/rt2x00config.c b/drivers/net/wireless/rt2x00/rt2x00config.c index 1059b4d1868..7c62ce125b9 100644 --- a/drivers/net/wireless/rt2x00/rt2x00config.c +++ b/drivers/net/wireless/rt2x00/rt2x00config.c @@ -92,8 +92,8 @@ void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev, erp.difs = bss_conf->use_short_slot ? SHORT_DIFS : DIFS; erp.eifs = bss_conf->use_short_slot ? SHORT_EIFS : EIFS; - erp.ack_timeout = PLCP + erp.difs + get_duration(ACK_SIZE, 10); - erp.ack_consume_time = SIFS + PLCP + get_duration(ACK_SIZE, 10); + erp.ack_timeout = PLCP + erp.difs + GET_DURATION(ACK_SIZE, 10); + erp.ack_consume_time = SIFS + PLCP + GET_DURATION(ACK_SIZE, 10); if (bss_conf->use_short_preamble) { erp.ack_timeout += SHORT_PREAMBLE; diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c index 7fc9c6eff98..d7752dbd202 100644 --- a/drivers/net/wireless/rt2x00/rt2x00queue.c +++ b/drivers/net/wireless/rt2x00/rt2x00queue.c @@ -319,8 +319,8 @@ static void rt2x00queue_create_tx_descriptor(struct queue_entry *entry, /* * Convert length to microseconds. */ - residual = get_duration_res(data_length, hwrate->bitrate); - duration = get_duration(data_length, hwrate->bitrate); + residual = GET_DURATION_RES(data_length, hwrate->bitrate); + duration = GET_DURATION(data_length, hwrate->bitrate); if (residual != 0) { duration++; -- 2.41.1