diff options
author | Andrew Jeffery <andrew@aj.id.au> | 2021-06-08 20:17:43 +0930 |
---|---|---|
committer | Corey Minyard <cminyard@mvista.com> | 2021-06-21 19:50:12 -0500 |
commit | ec6f0cf17a639743e622d4156b0a5009263fd479 (patch) | |
tree | 3d1c5697de3b2cb243faf0aa35553cb5e85f5c94 /drivers/char/ipmi | |
parent | 78ca0c0549803ab0f5ecab43e295111b7ccdc7f2 (diff) |
ipmi: kcs_bmc: Make status update atomic
Enable more efficient implementation of read-modify-write sequences.
Both device drivers for the KCS BMC stack use regmaps. The new callback
allows us to exploit regmap_update_bits().
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Zev Weiss <zweiss@equinix.com>
Message-Id: <20210608104757.582199-3-andrew@aj.id.au>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Diffstat (limited to 'drivers/char/ipmi')
-rw-r--r-- | drivers/char/ipmi/kcs_bmc.c | 7 | ||||
-rw-r--r-- | drivers/char/ipmi/kcs_bmc.h | 1 | ||||
-rw-r--r-- | drivers/char/ipmi/kcs_bmc_aspeed.c | 9 | ||||
-rw-r--r-- | drivers/char/ipmi/kcs_bmc_npcm7xx.c | 10 |
4 files changed, 21 insertions, 6 deletions
diff --git a/drivers/char/ipmi/kcs_bmc.c b/drivers/char/ipmi/kcs_bmc.c index f292e74bd4a5..58fb1a7bd50d 100644 --- a/drivers/char/ipmi/kcs_bmc.c +++ b/drivers/char/ipmi/kcs_bmc.c @@ -67,12 +67,7 @@ static inline void write_status(struct kcs_bmc *kcs_bmc, u8 data) static void update_status_bits(struct kcs_bmc *kcs_bmc, u8 mask, u8 val) { - u8 tmp = read_status(kcs_bmc); - - tmp &= ~mask; - tmp |= val & mask; - - write_status(kcs_bmc, tmp); + kcs_bmc->io_updateb(kcs_bmc, kcs_bmc->ioreg.str, mask, val); } static inline void set_state(struct kcs_bmc *kcs_bmc, u8 state) diff --git a/drivers/char/ipmi/kcs_bmc.h b/drivers/char/ipmi/kcs_bmc.h index eb9ea4ce78b8..970f53892f2d 100644 --- a/drivers/char/ipmi/kcs_bmc.h +++ b/drivers/char/ipmi/kcs_bmc.h @@ -76,6 +76,7 @@ struct kcs_bmc { struct kcs_ioreg ioreg; u8 (*io_inputb)(struct kcs_bmc *kcs_bmc, u32 reg); void (*io_outputb)(struct kcs_bmc *kcs_bmc, u32 reg, u8 b); + void (*io_updateb)(struct kcs_bmc *kcs_bmc, u32 reg, u8 mask, u8 val); enum kcs_phases phase; enum kcs_errors error; diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c b/drivers/char/ipmi/kcs_bmc_aspeed.c index 69be873f40ac..01ebb9da3d49 100644 --- a/drivers/char/ipmi/kcs_bmc_aspeed.c +++ b/drivers/char/ipmi/kcs_bmc_aspeed.c @@ -90,6 +90,14 @@ static void aspeed_kcs_outb(struct kcs_bmc *kcs_bmc, u32 reg, u8 data) WARN(rc != 0, "regmap_write() failed: %d\n", rc); } +static void aspeed_kcs_updateb(struct kcs_bmc *kcs_bmc, u32 reg, u8 mask, u8 val) +{ + struct aspeed_kcs_bmc *priv = kcs_bmc_priv(kcs_bmc); + int rc; + + rc = regmap_update_bits(priv->map, reg, mask, val); + WARN(rc != 0, "regmap_update_bits() failed: %d\n", rc); +} /* * AST_usrGuide_KCS.pdf @@ -345,6 +353,7 @@ static int aspeed_kcs_probe(struct platform_device *pdev) kcs_bmc->ioreg = ast_kcs_bmc_ioregs[channel - 1]; kcs_bmc->io_inputb = aspeed_kcs_inb; kcs_bmc->io_outputb = aspeed_kcs_outb; + kcs_bmc->io_updateb = aspeed_kcs_updateb; addr = ops->get_io_address(pdev); if (addr < 0) diff --git a/drivers/char/ipmi/kcs_bmc_npcm7xx.c b/drivers/char/ipmi/kcs_bmc_npcm7xx.c index 722f7391fe1f..1f44aadec9e8 100644 --- a/drivers/char/ipmi/kcs_bmc_npcm7xx.c +++ b/drivers/char/ipmi/kcs_bmc_npcm7xx.c @@ -97,6 +97,15 @@ static void npcm7xx_kcs_outb(struct kcs_bmc *kcs_bmc, u32 reg, u8 data) WARN(rc != 0, "regmap_write() failed: %d\n", rc); } +static void npcm7xx_kcs_updateb(struct kcs_bmc *kcs_bmc, u32 reg, u8 mask, u8 data) +{ + struct npcm7xx_kcs_bmc *priv = kcs_bmc_priv(kcs_bmc); + int rc; + + rc = regmap_update_bits(priv->map, reg, mask, data); + WARN(rc != 0, "regmap_update_bits() failed: %d\n", rc); +} + static void npcm7xx_kcs_enable_channel(struct kcs_bmc *kcs_bmc, bool enable) { struct npcm7xx_kcs_bmc *priv = kcs_bmc_priv(kcs_bmc); @@ -163,6 +172,7 @@ static int npcm7xx_kcs_probe(struct platform_device *pdev) kcs_bmc->ioreg.str = priv->reg->sts; kcs_bmc->io_inputb = npcm7xx_kcs_inb; kcs_bmc->io_outputb = npcm7xx_kcs_outb; + kcs_bmc->io_updateb = npcm7xx_kcs_updateb; dev_set_drvdata(dev, kcs_bmc); |