A device may want to write out ACPI tables to describe itself to Linux. Add a method to permit this.
Reviewed-by: Wolfgang Wallner wolfgang.wallner@br-automation.com Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v4: - Separate out the log newline
Changes in v3: None Changes in v2: - Drop definition of ACPI_TABLE_CREATOR - Make _acpi_write_dev_tables() static and switch argument order - Generalise the ACPI function recursion with acpi_recurse_method()
arch/sandbox/dts/test.dts | 4 +++ arch/x86/lib/acpi_table.c | 9 ----- drivers/core/acpi.c | 62 ++++++++++++++++++++++++++++++++++ include/acpi/acpi_table.h | 10 ++++++ include/dm/acpi.h | 30 +++++++++++++++++ lib/acpi/acpi_table.c | 10 ++++++ test/dm/acpi.c | 71 +++++++++++++++++++++++++++++++++++++++ 7 files changed, 187 insertions(+), 9 deletions(-)
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts index 5fa951ad4b6..1204c14b079 100644 --- a/arch/sandbox/dts/test.dts +++ b/arch/sandbox/dts/test.dts @@ -210,6 +210,10 @@ compatible = "denx,u-boot-acpi-test"; };
+ acpi-test2 { + compatible = "denx,u-boot-acpi-test"; + }; + clocks { clk_fixed: clk-fixed { compatible = "fixed-clock"; diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c index 4832364f3ca..98f97208339 100644 --- a/arch/x86/lib/acpi_table.c +++ b/arch/x86/lib/acpi_table.c @@ -60,15 +60,6 @@ static void acpi_write_rsdp(struct acpi_rsdp *rsdp, struct acpi_rsdt *rsdt, sizeof(struct acpi_rsdp)); }
-void acpi_fill_header(struct acpi_table_header *header, char *signature) -{ - memcpy(header->signature, signature, 4); - memcpy(header->oem_id, OEM_ID, 6); - memcpy(header->oem_table_id, OEM_TABLE_ID, 8); - header->oem_revision = U_BOOT_BUILD_DATE; - memcpy(header->aslc_id, ASLC_ID, 4); -} - static void acpi_write_rsdt(struct acpi_rsdt *rsdt) { struct acpi_table_header *header = &(rsdt->header); diff --git a/drivers/core/acpi.c b/drivers/core/acpi.c index 0e64c21bf5b..8a6570c3b95 100644 --- a/drivers/core/acpi.c +++ b/drivers/core/acpi.c @@ -11,8 +11,17 @@ #include <common.h> #include <dm.h> #include <dm/acpi.h> +#include <dm/device-internal.h> #include <dm/root.h>
+/* Type of method to call */ +enum method_t { + METHOD_WRITE_TABLES, +}; + +/* Prototype for all methods */ +typedef int (*acpi_method)(const struct udevice *dev, struct acpi_ctx *ctx); + int acpi_copy_name(char *out_name, const char *name) { strncpy(out_name, name, ACPI_NAME_MAX); @@ -31,3 +40,56 @@ int acpi_get_name(const struct udevice *dev, char *out_name)
return -ENOSYS; } + +acpi_method acpi_get_method(struct udevice *dev, enum method_t method) +{ + struct acpi_ops *aops; + + aops = device_get_acpi_ops(dev); + if (aops) { + switch (method) { + case METHOD_WRITE_TABLES: + return aops->write_tables; + } + } + + return NULL; +} + +int acpi_recurse_method(struct acpi_ctx *ctx, struct udevice *parent, + enum method_t method) +{ + struct udevice *dev; + acpi_method func; + int ret; + + func = acpi_get_method(parent, method); + if (func) { + log_debug("\n"); + log_debug("- %s %p\n", parent->name, func); + ret = device_ofdata_to_platdata(parent); + if (ret) + return log_msg_ret("ofdata", ret); + ret = func(parent, ctx); + if (ret) + return log_msg_ret("func", ret); + } + device_foreach_child(dev, parent) { + ret = acpi_recurse_method(ctx, dev, method); + if (ret) + return log_msg_ret("recurse", ret); + } + + return 0; +} + +int acpi_write_dev_tables(struct acpi_ctx *ctx) +{ + int ret; + + log_debug("Writing device tables\n"); + ret = acpi_recurse_method(ctx, dm_root(), METHOD_WRITE_TABLES); + log_debug("Writing finished, err=%d\n", ret); + + return ret; +} diff --git a/include/acpi/acpi_table.h b/include/acpi/acpi_table.h index 16048437a3f..7f44b0434b9 100644 --- a/include/acpi/acpi_table.h +++ b/include/acpi/acpi_table.h @@ -507,6 +507,16 @@ int acpi_get_table_revision(enum acpi_tables table); */ int acpi_create_dmar(struct acpi_dmar *dmar, enum dmar_flags flags);
+/** + * acpi_fill_header() - Set up a new table header + * + * This sets all fields except length, revision, checksum and aslc_revision + * + * @header: ACPI header to update + * @signature: Table signature to use (4 characters) + */ +void acpi_fill_header(struct acpi_table_header *header, char *signature); + #endif /* !__ACPI__*/
#include <asm/acpi_table.h> diff --git a/include/dm/acpi.h b/include/dm/acpi.h index ee218b44e85..9a0a437dd03 100644 --- a/include/dm/acpi.h +++ b/include/dm/acpi.h @@ -24,6 +24,17 @@
#if !defined(__ACPI__)
+/** + * struct acpi_ctx - Context used for writing ACPI tables + * + * This contains a few useful pieces of information used when writing + * + * @current: Current address for writing + */ +struct acpi_ctx { + void *current; +}; + /** * struct acpi_ops - ACPI operations supported by driver model */ @@ -38,6 +49,15 @@ struct acpi_ops { * other error */ int (*get_name)(const struct udevice *dev, char *out_name); + + /** + * write_tables() - Write out any tables required by this device + * + * @dev: Device to write + * @ctx: ACPI context to use + * @return 0 if OK, -ve on error + */ + int (*write_tables)(const struct udevice *dev, struct acpi_ctx *ctx); };
#define device_get_acpi_ops(dev) ((dev)->driver->acpi_ops) @@ -72,6 +92,16 @@ int acpi_get_name(const struct udevice *dev, char *out_name); */ int acpi_copy_name(char *out_name, const char *name);
+/** + * acpi_write_dev_tables() - Write ACPI tables required by devices + * + * This scans through all devices and tells them to write any tables they want + * to write. + * + * @return 0 if OK, -ve if any device returned an error + */ +int acpi_write_dev_tables(struct acpi_ctx *ctx); + #endif /* __ACPI__ */
#endif diff --git a/lib/acpi/acpi_table.c b/lib/acpi/acpi_table.c index ec354102f87..372f19b16d5 100644 --- a/lib/acpi/acpi_table.c +++ b/lib/acpi/acpi_table.c @@ -9,6 +9,7 @@ #include <acpi/acpi_table.h> #include <dm.h> #include <cpu.h> +#include <version.h>
int acpi_create_dmar(struct acpi_dmar *dmar, enum dmar_flags flags) { @@ -88,3 +89,12 @@ int acpi_get_table_revision(enum acpi_tables table) return -EINVAL; } } + +void acpi_fill_header(struct acpi_table_header *header, char *signature) +{ + memcpy(header->signature, signature, 4); + memcpy(header->oem_id, OEM_ID, 6); + memcpy(header->oem_table_id, OEM_TABLE_ID, 8); + header->oem_revision = U_BOOT_BUILD_DATE; + memcpy(header->aslc_id, ASLC_ID, 4); +} diff --git a/test/dm/acpi.c b/test/dm/acpi.c index 21ed7c74409..5743530a3a5 100644 --- a/test/dm/acpi.c +++ b/test/dm/acpi.c @@ -8,12 +8,26 @@
#include <common.h> #include <dm.h> +#include <version.h> #include <acpi/acpi_table.h> #include <dm/acpi.h> #include <dm/test.h> #include <test/ut.h>
#define ACPI_TEST_DEV_NAME "ABCD" +#define BUF_SIZE 4096 + +static int testacpi_write_tables(const struct udevice *dev, + struct acpi_ctx *ctx) +{ + struct acpi_dmar *dmar; + + dmar = (struct acpi_dmar *)ctx->current; + acpi_create_dmar(dmar, DMAR_INTR_REMAP); + ctx->current += sizeof(struct acpi_dmar); + + return 0; +}
static int testacpi_get_name(const struct udevice *dev, char *out_name) { @@ -22,6 +36,7 @@ static int testacpi_get_name(const struct udevice *dev, char *out_name)
struct acpi_ops testacpi_ops = { .get_name = testacpi_get_name, + .write_tables = testacpi_write_tables, };
static const struct udevice_id testacpi_ids[] = { @@ -80,3 +95,59 @@ static int dm_test_acpi_create_dmar(struct unit_test_state *uts) return 0; } DM_TEST(dm_test_acpi_create_dmar, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); + +/* Test acpi_fill_header() */ +static int dm_test_acpi_fill_header(struct unit_test_state *uts) +{ + struct acpi_table_header hdr; + + /* Make sure these 5 fields are not changed */ + hdr.length = 0x11; + hdr.revision = 0x22; + hdr.checksum = 0x33; + hdr.aslc_revision = 0x44; + acpi_fill_header(&hdr, "ABCD"); + + ut_asserteq_mem("ABCD", hdr.signature, sizeof(hdr.signature)); + ut_asserteq(0x11, hdr.length); + ut_asserteq(0x22, hdr.revision); + ut_asserteq(0x33, hdr.checksum); + ut_asserteq_mem(OEM_ID, hdr.oem_id, sizeof(hdr.oem_id)); + ut_asserteq_mem(OEM_TABLE_ID, hdr.oem_table_id, + sizeof(hdr.oem_table_id)); + ut_asserteq(U_BOOT_BUILD_DATE, hdr.oem_revision); + ut_asserteq_mem(ASLC_ID, hdr.aslc_id, sizeof(hdr.aslc_id)); + ut_asserteq(0x44, hdr.aslc_revision); + + return 0; +} +DM_TEST(dm_test_acpi_fill_header, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); + +/* Test ACPI write_tables() */ +static int dm_test_acpi_write_tables(struct unit_test_state *uts) +{ + struct acpi_dmar *dmar; + struct acpi_ctx ctx; + void *buf; + + buf = malloc(BUF_SIZE); + ut_assertnonnull(buf); + + ctx.current = buf; + ut_assertok(acpi_write_dev_tables(&ctx)); + dmar = buf; + + /* + * We should have two dmar tables, one for each "denx,u-boot-acpi-test" + * device + */ + ut_asserteq_ptr(dmar + 2, ctx.current); + ut_asserteq(DMAR_INTR_REMAP, dmar->flags); + ut_asserteq(32 - 1, dmar->host_address_width); + + ut_asserteq(DMAR_INTR_REMAP, dmar[1].flags); + ut_asserteq(32 - 1, dmar[1].host_address_width); + + return 0; +} +DM_TEST(dm_test_acpi_write_tables, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);