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Re: [Qemu-devel] [PATCH 5/7] acpi: Add I2c serial bus CRS handling
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH 5/7] acpi: Add I2c serial bus CRS handling |
Date: |
Thu, 12 May 2016 10:30:32 +0300 |
On Wed, May 11, 2016 at 02:46:04PM -0500, address@hidden wrote:
> From: Corey Minyard <address@hidden>
>
> Signed-off-by: Corey Minyard <address@hidden>
> ---
> hw/acpi/aml-build.c | 42 ++++++++++++++++++++++++++++++++++++++++++
> include/hw/acpi/aml-build.h | 11 +++++++++++
> 2 files changed, 53 insertions(+)
>
> diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
> index ab89ca6..7a3874b 100644
> --- a/hw/acpi/aml-build.c
> +++ b/hw/acpi/aml-build.c
> @@ -1563,3 +1563,45 @@ build_rsdt(GArray *table_data, GArray *linker, GArray
> *table_offsets,
> build_header(linker, table_data,
> (void *)rsdt, "RSDT", rsdt_len, 1, oem_id, oem_table_id);
> }
> +
Pls add comment with earliest spec revision that includes this.
> +static Aml *aml_serial_bus_device(AmlSerialBusType type, uint8_t flags,
> + uint16_t type_flags,
> + uint8_t revid, uint16_t data_length,
> + uint16_t resource_source_length)
> +{
> + Aml *var = aml_alloc();
> + uint16_t length = data_length + resource_source_length + 9;
> +
> + build_append_byte(var->buf, 0x8e); /* Serial Bus Connection Descriptor */
> + build_append_byte(var->buf, length & 0xff);
> + build_append_byte(var->buf, length >> 8);
> + build_append_byte(var->buf, 1); /* Revision */
> + build_append_byte(var->buf, 0); /* Resource source index */
> + build_append_byte(var->buf, type); /* Serial bus type */
> + build_append_byte(var->buf, flags); /* Serial bus type */
Fix comments to match spec verbatim please.
> + build_append_byte(var->buf, type_flags & 0xff);
> + build_append_byte(var->buf, type_flags >> 8);
> + build_append_byte(var->buf, revid);
> + build_append_byte(var->buf, data_length & 0xff);
> + build_append_byte(var->buf, data_length >> 8);
> +
Please use build_append_int_noprefix.
> + return var;
> +}
> +
> +Aml *aml_i2c_serial_bus_device(uint8_t flags, uint32_t con_speed,
> + uint16_t address, const char *resource_source)
> +{
> + unsigned int resource_source_len = strlen(resource_source) + 1;
> + Aml *var = aml_serial_bus_device(aml_serial_bus_type_i2c, flags, 0, 1,
> + 6, resource_source_len);
> +
> + build_append_byte(var->buf, con_speed & 0xff);
> + build_append_byte(var->buf, (con_speed >> 8) & 0xff);
> + build_append_byte(var->buf, (con_speed >> 16) & 0xff);
> + build_append_byte(var->buf, (con_speed >> 24) & 0xff);
Please use build_append_int_noprefix.
> + build_append_byte(var->buf, address & 0xff);
> + build_append_byte(var->buf, address >> 8);
Same.
> + g_array_append_vals(var->buf, resource_source, resource_source_len);
Is resource_source a name then? Then you should do
aml_append(var, aml_name("%s", alias_object));
> +
> + return var;
> +}
> diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
> index 2c994b3..1eb3ebd 100644
> --- a/include/hw/acpi/aml-build.h
> +++ b/include/hw/acpi/aml-build.h
> @@ -206,6 +206,15 @@ struct AcpiBuildTables {
> GArray *linker;
> } AcpiBuildTables;
>
> +typedef enum {
> + aml_serial_bus_type_i2c = 1,
> + aml_serial_bus_type_spi = 2,
> + aml_serial_bus_type_uart = 3
> +} AmlSerialBusType;
> +
> +#define AML_SERIAL_BUS_FLAG_MASTER_DEVICE (1 << 0)
> +#define AML_SERIAL_BUS_FLAG_CONSUME_ONLY (1 << 1)
> +
Please drop enums and add numbers with comments matching
text in ACPI spec in aml-build.c
> /**
> * init_aml_allocator:
> *
> @@ -327,6 +336,8 @@ Aml *aml_qword_memory(AmlDecode dec, AmlMinFixed
> min_fixed,
> Aml *aml_dma(AmlDmaType typ, AmlDmaBusMaster bm, AmlTransferSize sz,
> uint8_t channel);
> Aml *aml_sleep(uint64_t msec);
> +Aml *aml_i2c_serial_bus_device(uint8_t flags, uint32_t con_speed,
Drop these two parameters until they are actually useful.
> + uint16_t address, const char
> *resource_source);
>
> /* Block AML object primitives */
> Aml *aml_scope(const char *name_format, ...) GCC_FMT_ATTR(1, 2);
> --
> 2.7.4
- [Qemu-devel] [PATCH 0/7] Fix PM SMBus and add IPMI over SMBus, minyard, 2016/05/11
- [Qemu-devel] [PATCH 2/7] pm_smbus: Add the ability to force block transfer enable, minyard, 2016/05/11
- [Qemu-devel] [PATCH 7/7] ipmi: Add ACPI to the SMBus IPMI device, minyard, 2016/05/11
- [Qemu-devel] [PATCH 4/7] ipmi: Add an SMBus IPMI interface, minyard, 2016/05/11
- [Qemu-devel] [PATCH 6/7] ipmi: Fix SSIF ACPI handling to use the right CRS, minyard, 2016/05/11
- [Qemu-devel] [PATCH 5/7] acpi: Add I2c serial bus CRS handling, minyard, 2016/05/11
- Re: [Qemu-devel] [PATCH 5/7] acpi: Add I2c serial bus CRS handling,
Michael S. Tsirkin <=
- [Qemu-devel] [PATCH 3/7] pc: Add the SMBus device to the ACPI tables, minyard, 2016/05/11
- [Qemu-devel] [PATCH 1/7] i2c: Fix the PM SMBus driver so it actually works correctly, minyard, 2016/05/11