diff options
Diffstat (limited to 'drivers/gpu/arm/midgard/mali_kbase_cpuprops.c')
| -rw-r--r-- | drivers/gpu/arm/midgard/mali_kbase_cpuprops.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/gpu/arm/midgard/mali_kbase_cpuprops.c b/drivers/gpu/arm/midgard/mali_kbase_cpuprops.c new file mode 100644 index 000000000000..5b62539dfbab --- /dev/null +++ b/drivers/gpu/arm/midgard/mali_kbase_cpuprops.c @@ -0,0 +1,125 @@ +/* + * + * (C) COPYRIGHT 2011-2015 ARM Limited. All rights reserved. + * + * This program is free software and is provided to you under the terms of the + * GNU General Public License version 2 as published by the Free Software + * Foundation, and any use by you of this program is subject to the terms + * of such GNU licence. + * + * A copy of the licence is included with the program, and can also be obtained + * from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + */ + + + +/* + * Base kernel property query APIs + */ + +#include "mali_kbase.h" +#ifdef BASE_LEGACY_UK7_SUPPORT + +#include "mali_kbase_cpuprops.h" +#include "mali_kbase_uku.h" +#include <mali_kbase_config.h> +#include <mali_kbase_config_defaults.h> +#include <linux/cache.h> +#include <linux/cpufreq.h> +#if defined(CONFIG_ARM) || defined(CONFIG_ARM64) +#include <asm/cputype.h> +#endif + +#define KBASE_DEFAULT_CPU_NUM 0 + +#define L1_DCACHE_LINE_SIZE_LOG2 L1_CACHE_SHIFT + +/* + * Macros used to extract cpu id info + * see documentation for Main ID register + */ +#define KBASE_CPUPROPS_ID_GET_REV(cpuid) ((cpuid) & 0x0F) /* [3:0] Revision */ +#define KBASE_CPUPROPS_ID_GET_PART_NR(cpuid)(((cpuid) >> 4) & 0xFFF) /* [15:4] Part number */ +#define KBASE_CPUPROPS_ID_GET_ARCH(cpuid) (((cpuid) >> 16) & 0x0F) /* [19:16] Architecture */ +#define KBASE_CPUPROPS_ID_GET_VARIANT(cpuid)(((cpuid) >> 20) & 0x0F) /* [23:20] Variant */ +#define KBASE_CPUPROPS_ID_GET_CODE(cpuid) (((cpuid) >> 24) & 0xFF) /* [31:23] ASCII code of implementer trademark */ + +/*Below value sourced from OSK*/ +#define L1_DCACHE_SIZE ((u32)0x00008000) + +/** + * kbasep_cpuprops_uk_get_cpu_id_info - Retrieves detailed CPU info from given + * cpu_val ( ID reg ) + * @kbase_props: CPU props to be filled-in with cpu id info + * + */ +#if defined(CONFIG_ARM) || defined(CONFIG_ARM64) +static void kbasep_cpuprops_uk_get_cpu_id_info(struct kbase_uk_cpuprops * const kbase_props) +{ + kbase_props->props.cpu_id.id = read_cpuid_id(); + + kbase_props->props.cpu_id.valid = 1; + kbase_props->props.cpu_id.rev = KBASE_CPUPROPS_ID_GET_REV(kbase_props->props.cpu_id.id); + kbase_props->props.cpu_id.part = KBASE_CPUPROPS_ID_GET_PART_NR(kbase_props->props.cpu_id.id); + kbase_props->props.cpu_id.arch = KBASE_CPUPROPS_ID_GET_ARCH(kbase_props->props.cpu_id.id); + kbase_props->props.cpu_id.variant = KBASE_CPUPROPS_ID_GET_VARIANT(kbase_props->props.cpu_id.id); + kbase_props->props.cpu_id.implementer = KBASE_CPUPROPS_ID_GET_CODE(kbase_props->props.cpu_id.id); +} +#else +static void kbasep_cpuprops_uk_get_cpu_id_info(struct kbase_uk_cpuprops * const kbase_props) +{ + kbase_props->props.cpu_id.id = 0; + kbase_props->props.cpu_id.valid = 0; + kbase_props->props.cpu_id.rev = 0; + kbase_props->props.cpu_id.part = 0; + kbase_props->props.cpu_id.arch = 0; + kbase_props->props.cpu_id.variant = 0; + kbase_props->props.cpu_id.implementer = 'N'; +} +#endif + +/* + * This function (and file!) is kept for the backward compatibility reasons. + * It shall be removed as soon as KBASE_FUNC_CPU_PROPS_REG_DUMP_OBSOLETE + * (previously KBASE_FUNC_CPU_PROPS_REG_DUMP) ioctl call + * is removed. Removal of KBASE_FUNC_CPU_PROPS_REG_DUMP is part of having + * the function for reading cpu properties moved from base to osu. + */ + +int kbase_cpuprops_uk_get_props(struct kbase_context *kctx, + struct kbase_uk_cpuprops * const props) +{ + unsigned int max_cpu_freq; + + props->props.cpu_l1_dcache_line_size_log2 = L1_DCACHE_LINE_SIZE_LOG2; + props->props.cpu_l1_dcache_size = L1_DCACHE_SIZE; + props->props.cpu_flags = BASE_CPU_PROPERTY_FLAG_LITTLE_ENDIAN; + + props->props.nr_cores = num_possible_cpus(); + props->props.cpu_page_size_log2 = PAGE_SHIFT; + props->props.available_memory_size = totalram_pages << PAGE_SHIFT; + + kbasep_cpuprops_uk_get_cpu_id_info(props); + + /* check if kernel supports dynamic frequency scaling */ + max_cpu_freq = cpufreq_quick_get_max(KBASE_DEFAULT_CPU_NUM); + if (max_cpu_freq != 0) { + /* convert from kHz to mHz */ + props->props.max_cpu_clock_speed_mhz = max_cpu_freq / 1000; + } else { + /* fallback if CONFIG_CPU_FREQ turned off */ + int err; + kbase_cpu_clk_speed_func get_clock_speed; + + get_clock_speed = (kbase_cpu_clk_speed_func) CPU_SPEED_FUNC; + err = get_clock_speed(&props->props.max_cpu_clock_speed_mhz); + if (err) + return err; + } + + return 0; +} + +#endif /* BASE_LEGACY_UK7_SUPPORT */ |