[PATCH 1/2] sticon/parisc: Allow 64-bit STI calls in PDC firmware abstration
From: Helge Deller <deller@gmx.de>
Date: 2023-05-22 13:58:31
Also in:
dri-devel
Subsystem:
framebuffer layer, parisc architecture, the rest · Maintainers:
Helge Deller, "James E.J. Bottomley", Linus Torvalds
Some 64-bit machines require us to call the STI ROM in 64-bit mode, e.g. with the VisFXe graphic card. This patch allows drivers to use such 64-bit calling conventions. Signed-off-by: Helge Deller <deller@gmx.de> --- arch/parisc/include/asm/pdc.h | 4 ++-- arch/parisc/kernel/firmware.c | 21 ++++++++++++++------- drivers/video/sticore.c | 2 +- 3 files changed, 17 insertions(+), 10 deletions(-)
diff --git a/arch/parisc/include/asm/pdc.h b/arch/parisc/include/asm/pdc.h
index 2b4fad8328e8..269b9a159f01 100644
--- a/arch/parisc/include/asm/pdc.h
+++ b/arch/parisc/include/asm/pdc.h@@ -88,8 +88,8 @@ int pdc_iodc_print(const unsigned char *str, unsigned count); void pdc_emergency_unlock(void); int pdc_sti_call(unsigned long func, unsigned long flags, - unsigned long inptr, unsigned long outputr, - unsigned long glob_cfg); + unsigned long inptr, unsigned long outputr, + unsigned long glob_cfg, int do_call64); int __pdc_cpu_rendezvous(void); void pdc_cpu_rendezvous_lock(void);
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index cc124d9f1f7f..71ef1640db5a 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c@@ -1389,17 +1389,24 @@ int pdc_iodc_getc(void) } int pdc_sti_call(unsigned long func, unsigned long flags, - unsigned long inptr, unsigned long outputr, - unsigned long glob_cfg) + unsigned long inptr, unsigned long outputr, + unsigned long glob_cfg, int do_call64) { - int retval; + int retval = 0; unsigned long irqflags; - spin_lock_irqsave(&pdc_lock, irqflags); - retval = real32_call(func, flags, inptr, outputr, glob_cfg); - spin_unlock_irqrestore(&pdc_lock, irqflags); + spin_lock_irqsave(&pdc_lock, irqflags); + if (IS_ENABLED(CONFIG_64BIT) && do_call64) { +#ifdef CONFIG_64BIT + retval = real64_call(func, flags, inptr, outputr, glob_cfg); +#else + WARN_ON(1); +#endif + } else + retval = real32_call(func, flags, inptr, outputr, glob_cfg); + spin_unlock_irqrestore(&pdc_lock, irqflags); - return retval; + return retval; } EXPORT_SYMBOL(pdc_sti_call);
diff --git a/drivers/video/sticore.c b/drivers/video/sticore.c
index 7eb925f2ba9c..60ba3ab5b6cc 100644
--- a/drivers/video/sticore.c
+++ b/drivers/video/sticore.c@@ -1142,7 +1142,7 @@ int sti_call(const struct sti_struct *sti, unsigned long func, return -1; #endif - ret = pdc_sti_call(func, _flags, _inptr, _outptr, _glob_cfg); + ret = pdc_sti_call(func, _flags, _inptr, _outptr, _glob_cfg, 0); return ret; } --
2.40.1