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Date: Tue, 5 Jan 2016 03:10:23 +0000
From: "Zheng, Lv" <lv.zheng@...el.com>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>
CC: ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
"Moore, Robert" <robert.moore@...el.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] ACPICA: Drop Linux-specific waking vector functions
Hi, Rafael
> From: Rafael J. Wysocki [mailto:rjw@...ysocki.net]
> Sent: Monday, January 4, 2016 9:28 PM
> Subject: Re: [PATCH] ACPICA: Drop Linux-specific waking vector functions
>
> On Monday, January 04, 2016 07:33:55 AM Zheng, Lv wrote:
> > Hi, Rafael
> >
> > Acke-by: Lv Zheng <lv.zheng@...el.com>
> >
> > One more improvement is:
> > After applying this patch, I can still detect the following diff blocks using
> ACPICA's divergence checking utility:
> > diff -E -b -w -B -rpuN linux-acpica/drivers/acpi/acpica/hwxfsleep.c acpica-
> linuxized/drivers/acpi/acpica/hwxfsleep.c
> > --- linux-acpica/drivers/acpi/acpica/hwxfsleep.c 2016-01-04
> 15:16:31.000000000 +0800
> > +++ acpica-linuxized/drivers/acpi/acpica/hwxfsleep.c 2016-01-04
> 15:17:19.000000000 +0800
> > @@ -90,9 +90,9 @@ static struct acpi_sleep_functions acpi_
> > *
> > * PARAMETERS: facs - Pointer to FACS table
> > * physical_address - 32-bit physical address of ACPI real mode
> > - * entry point.
> > + * entry point
> > * physical_address64 - 64-bit physical address of ACPI protected
> > - * mode entry point.
> > + * entry point
> > *
> > * RETURN: Status
> > *
> > @@ -141,9 +140,9 @@ acpi_hw_set_firmware_waking_vector(struc
> > * FUNCTION: acpi_set_firmware_waking_vector
> > *
> > * PARAMETERS: physical_address - 32-bit physical address of ACPI real
> mode
> > - * entry point.
> > + * entry point
> > * physical_address64 - 64-bit physical address of ACPI protected
> > - * mode entry point.
> > + * entry point
> > *
> > * RETURN: Status
> > *
> > This seems to be added recently in ACPICA upstream.
> > Hope you can help to reduce this in the same patch.
> > Thanks in advance.
>
> So the periods seem to have gone away, right?
[Lv Zheng]
Yes, the "mode" deletion from ACPICA upstream seems to be wrong.
>
> OK, what about the following one?
[Lv Zheng]
Looks perfect!
I'll help to restore "mode" back to ACPICA upstream.
Thanks and best regards
-Lv
>
> ---
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Subject: [PATCH] ACPICA: Drop Linux-specific waking vector functions
>
> Commit f06147f9fbf1 (ACPICA: Hardware: Enable firmware waking vector
> for both 32-bit and 64-bit FACS) added three functions that aren't
> present in upstream ACPICA, acpi_hw_set_firmware_waking_vectors(),
> acpi_set_firmware_waking_vectors() and
> acpi_set_firmware_waking_vector64(),
> to allow Linux to use the previously existing API for setting the
> platform firmware waking vector.
>
> However, that wasn't necessary, since the ACPI sleep support code
> in Linux can be modified to use the upstream ACPICA's API easily
> and the additional functions may be dropped which reduces the code
> size and puts the kernel's ACPICA code more in line with the upstream.
>
> Make the changes as per the above. While at it, make the relevant
> function desctiption comments reflect the upstream ACPICA's ones.
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Acked-by: Lv Zheng <lv.zheng@...el.com>
> ---
> drivers/acpi/acpica/hwxfsleep.c | 96 +++++++---------------------------------
> drivers/acpi/sleep.c | 4 -
> drivers/acpi/sleep.h | 6 ++
> include/acpi/acpixf.h | 10 ----
> 4 files changed, 28 insertions(+), 88 deletions(-)
>
> Index: linux-pm/drivers/acpi/acpica/hwxfsleep.c
> ================================================================
> ===
> --- linux-pm.orig/drivers/acpi/acpica/hwxfsleep.c
> +++ linux-pm/drivers/acpi/acpica/hwxfsleep.c
> @@ -52,9 +52,9 @@ ACPI_MODULE_NAME("hwxfsleep")
> /* Local prototypes */
> #if (!ACPI_REDUCED_HARDWARE)
> static acpi_status
> -acpi_hw_set_firmware_waking_vectors(struct acpi_table_facs *facs,
> - acpi_physical_address physical_address,
> - acpi_physical_address physical_address64);
> +acpi_hw_set_firmware_waking_vector(struct acpi_table_facs *facs,
> + acpi_physical_address physical_address,
> + acpi_physical_address physical_address64);
> #endif
>
> static acpi_status acpi_hw_sleep_dispatch(u8 sleep_state, u32 function_id);
> @@ -79,22 +79,20 @@ static struct acpi_sleep_functions acpi_
>
> /*
> * These functions are removed for the ACPI_REDUCED_HARDWARE case:
> - * acpi_set_firmware_waking_vectors
> * acpi_set_firmware_waking_vector
> - * acpi_set_firmware_waking_vector64
> * acpi_enter_sleep_state_s4bios
> */
>
> #if (!ACPI_REDUCED_HARDWARE)
>
> /***************************************************************
> ****************
> *
> - * FUNCTION: acpi_hw_set_firmware_waking_vectors
> + * FUNCTION: acpi_hw_set_firmware_waking_vector
> *
> * PARAMETERS: facs - Pointer to FACS table
> * physical_address - 32-bit physical address of ACPI real mode
> - * entry point.
> + * entry point
> * physical_address64 - 64-bit physical address of ACPI protected
> - * mode entry point.
> + * mode entry point
> *
> * RETURN: Status
> *
> @@ -103,11 +101,11 @@ static struct acpi_sleep_functions acpi_
>
> ****************************************************************
> **************/
>
> static acpi_status
> -acpi_hw_set_firmware_waking_vectors(struct acpi_table_facs *facs,
> - acpi_physical_address physical_address,
> - acpi_physical_address physical_address64)
> +acpi_hw_set_firmware_waking_vector(struct acpi_table_facs *facs,
> + acpi_physical_address physical_address,
> + acpi_physical_address physical_address64)
> {
> - ACPI_FUNCTION_TRACE(acpi_hw_set_firmware_waking_vectors);
> + ACPI_FUNCTION_TRACE(acpi_hw_set_firmware_waking_vector);
>
>
> /*
> @@ -140,12 +138,12 @@ acpi_hw_set_firmware_waking_vectors(stru
>
>
> /***************************************************************
> ****************
> *
> - * FUNCTION: acpi_set_firmware_waking_vectors
> + * FUNCTION: acpi_set_firmware_waking_vector
> *
> * PARAMETERS: physical_address - 32-bit physical address of ACPI real
> mode
> - * entry point.
> + * entry point
> * physical_address64 - 64-bit physical address of ACPI protected
> - * mode entry point.
> + * mode entry point
> *
> * RETURN: Status
> *
> @@ -154,79 +152,23 @@ acpi_hw_set_firmware_waking_vectors(stru
>
> ****************************************************************
> **************/
>
> acpi_status
> -acpi_set_firmware_waking_vectors(acpi_physical_address physical_address,
> - acpi_physical_address physical_address64)
> +acpi_set_firmware_waking_vector(acpi_physical_address physical_address,
> + acpi_physical_address physical_address64)
> {
>
> - ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vectors);
> + ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
>
> if (acpi_gbl_FACS) {
> - (void)acpi_hw_set_firmware_waking_vectors(acpi_gbl_FACS,
> - physical_address,
> - physical_address64);
> + (void)acpi_hw_set_firmware_waking_vector(acpi_gbl_FACS,
> + physical_address,
> + physical_address64);
> }
>
> return_ACPI_STATUS(AE_OK);
> }
>
> -ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vectors)
> -
> -
> /***************************************************************
> ****************
> - *
> - * FUNCTION: acpi_set_firmware_waking_vector
> - *
> - * PARAMETERS: physical_address - 32-bit physical address of ACPI real
> mode
> - * entry point.
> - *
> - * RETURN: Status
> - *
> - * DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS
> - *
> -
> ****************************************************************
> **************/
> -acpi_status acpi_set_firmware_waking_vector(u32 physical_address)
> -{
> - acpi_status status;
> -
> - ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
> -
> - status = acpi_set_firmware_waking_vectors((acpi_physical_address)
> - physical_address, 0);
> -
> - return_ACPI_STATUS(status);
> -}
> -
> ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
>
> -#if ACPI_MACHINE_WIDTH == 64
> -
> /***************************************************************
> ****************
> - *
> - * FUNCTION: acpi_set_firmware_waking_vector64
> - *
> - * PARAMETERS: physical_address - 64-bit physical address of ACPI
> protected
> - * mode entry point.
> - *
> - * RETURN: Status
> - *
> - * DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS,
> if
> - * it exists in the table. This function is intended for use with
> - * 64-bit host operating systems.
> - *
> -
> ****************************************************************
> **************/
> -acpi_status acpi_set_firmware_waking_vector64(u64 physical_address)
> -{
> - acpi_status status;
> -
> - ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector64);
> -
> - status = acpi_set_firmware_waking_vectors(0,
> - (acpi_physical_address)
> - physical_address);
> -
> - return_ACPI_STATUS(status);
> -}
> -
> -ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64)
> -#endif
>
> /***************************************************************
> ****************
> *
> * FUNCTION: acpi_enter_sleep_state_s4bios
> Index: linux-pm/include/acpi/acpixf.h
> ================================================================
> ===
> --- linux-pm.orig/include/acpi/acpixf.h
> +++ linux-pm/include/acpi/acpixf.h
> @@ -863,17 +863,9 @@ ACPI_EXTERNAL_RETURN_STATUS(acpi_status
> ACPI_EXTERNAL_RETURN_STATUS(acpi_status acpi_leave_sleep_state(u8
> sleep_state))
>
> ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
> - acpi_set_firmware_waking_vectors
> + acpi_set_firmware_waking_vector
> (acpi_physical_address physical_address,
> acpi_physical_address physical_address64))
> -ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
> - acpi_set_firmware_waking_vector(u32
> -
> physical_address))
> -#if ACPI_MACHINE_WIDTH == 64
> -ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
> - acpi_set_firmware_waking_vector64(u64
> -
> physical_address))
> -#endif
> /*
> * ACPI Timer interfaces
> */
> Index: linux-pm/drivers/acpi/sleep.c
> ================================================================
> ===
> --- linux-pm.orig/drivers/acpi/sleep.c
> +++ linux-pm/drivers/acpi/sleep.c
> @@ -61,7 +61,7 @@ static int acpi_sleep_prepare(u32 acpi_s
> if (acpi_state == ACPI_STATE_S3) {
> if (!acpi_wakeup_address)
> return -EFAULT;
> - acpi_set_firmware_waking_vector(acpi_wakeup_address);
> + acpi_set_waking_vector(acpi_wakeup_address);
>
> }
> ACPI_FLUSH_CPU_CACHE();
> @@ -410,7 +410,7 @@ static void acpi_pm_finish(void)
> acpi_leave_sleep_state(acpi_state);
>
> /* reset firmware waking vector */
> - acpi_set_firmware_waking_vector((acpi_physical_address) 0);
> + acpi_set_waking_vector(0);
>
> acpi_target_sleep_state = ACPI_STATE_S0;
>
> Index: linux-pm/drivers/acpi/sleep.h
> ================================================================
> ===
> --- linux-pm.orig/drivers/acpi/sleep.h
> +++ linux-pm/drivers/acpi/sleep.h
> @@ -6,3 +6,9 @@ extern struct list_head acpi_wakeup_devi
> extern struct mutex acpi_device_lock;
>
> extern void acpi_resume_power_resources(void);
> +
> +static inline acpi_status acpi_set_waking_vector(u32 wakeup_address)
> +{
> + return acpi_set_firmware_waking_vector(
> + (acpi_physical_address)wakeup_address, 0);
> +}
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