diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_utils.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_utils.h | 139 |
1 files changed, 75 insertions, 64 deletions
diff --git a/drivers/gpu/drm/i915/i915_utils.h b/drivers/gpu/drm/i915/i915_utils.h index 12fc250b47b9..4f75115b87d6 100644 --- a/drivers/gpu/drm/i915/i915_utils.h +++ b/drivers/gpu/drm/i915/i915_utils.h @@ -25,83 +25,72 @@ #ifndef __I915_UTILS_H #define __I915_UTILS_H -#undef WARN_ON -/* Many gcc seem to no see through this and fall over :( */ -#if 0 -#define WARN_ON(x) ({ \ - bool __i915_warn_cond = (x); \ - if (__builtin_constant_p(__i915_warn_cond)) \ - BUILD_BUG_ON(__i915_warn_cond); \ - WARN(__i915_warn_cond, "WARN_ON(" #x ")"); }) -#else -#define WARN_ON(x) WARN((x), "%s", "WARN_ON(" __stringify(x) ")") +#include <linux/overflow.h> +#include <linux/sched.h> +#include <linux/string_helpers.h> +#include <linux/types.h> +#include <linux/workqueue.h> +#include <linux/sched/clock.h> + +#ifdef CONFIG_X86 +#include <asm/hypervisor.h> #endif -#undef WARN_ON_ONCE -#define WARN_ON_ONCE(x) WARN_ONCE((x), "%s", "WARN_ON_ONCE(" __stringify(x) ")") - -#define MISSING_CASE(x) WARN(1, "Missing switch case (%lu) in %s\n", \ - (long)(x), __func__) +struct drm_i915_private; -#if GCC_VERSION >= 70000 -#define add_overflows(A, B) \ - __builtin_add_overflow_p((A), (B), (typeof((A) + (B)))0) -#else -#define add_overflows(A, B) ({ \ - typeof(A) a = (A); \ - typeof(B) b = (B); \ - a + b < a; \ -}) +#ifndef MISSING_CASE +#define MISSING_CASE(x) WARN(1, "Missing case (%s == %ld)\n", \ + __stringify(x), (long)(x)) #endif -#define range_overflows(start, size, max) ({ \ - typeof(start) start__ = (start); \ - typeof(size) size__ = (size); \ - typeof(max) max__ = (max); \ - (void)(&start__ == &size__); \ - (void)(&start__ == &max__); \ - start__ > max__ || size__ > max__ - start__; \ -}) - -#define range_overflows_t(type, start, size, max) \ - range_overflows((type)(start), (type)(size), (type)(max)) - -/* Note we don't consider signbits :| */ -#define overflows_type(x, T) \ - (sizeof(x) > sizeof(T) && (x) >> (sizeof(T) * BITS_PER_BYTE)) +#if IS_ENABLED(CONFIG_DRM_I915_DEBUG) -#define ptr_mask_bits(ptr, n) ({ \ - unsigned long __v = (unsigned long)(ptr); \ - (typeof(ptr))(__v & -BIT(n)); \ -}) +int __i915_inject_probe_error(struct drm_i915_private *i915, int err, + const char *func, int line); +#define i915_inject_probe_error(_i915, _err) \ + __i915_inject_probe_error((_i915), (_err), __func__, __LINE__) +bool i915_error_injected(void); -#define ptr_unmask_bits(ptr, n) ((unsigned long)(ptr) & (BIT(n) - 1)) +#else -#define ptr_unpack_bits(ptr, bits, n) ({ \ - unsigned long __v = (unsigned long)(ptr); \ - *(bits) = __v & (BIT(n) - 1); \ - (typeof(ptr))(__v & -BIT(n)); \ -}) +#define i915_inject_probe_error(i915, e) ({ BUILD_BUG_ON_INVALID(i915); 0; }) +#define i915_error_injected() false -#define ptr_pack_bits(ptr, bits, n) \ - ((typeof(ptr))((unsigned long)(ptr) | (bits))) +#endif -#define page_mask_bits(ptr) ptr_mask_bits(ptr, PAGE_SHIFT) -#define page_unmask_bits(ptr) ptr_unmask_bits(ptr, PAGE_SHIFT) -#define page_pack_bits(ptr, bits) ptr_pack_bits(ptr, bits, PAGE_SHIFT) -#define page_unpack_bits(ptr, bits) ptr_unpack_bits(ptr, bits, PAGE_SHIFT) +#define i915_inject_probe_failure(i915) i915_inject_probe_error((i915), -ENODEV) -#define ptr_offset(ptr, member) offsetof(typeof(*(ptr)), member) +#define i915_probe_error(i915, fmt, ...) ({ \ + if (i915_error_injected()) \ + drm_dbg(&(i915)->drm, fmt, ##__VA_ARGS__); \ + else \ + drm_err(&(i915)->drm, fmt, ##__VA_ARGS__); \ +}) +#ifndef fetch_and_zero #define fetch_and_zero(ptr) ({ \ typeof(*ptr) __T = *(ptr); \ *(ptr) = (typeof(*ptr))0; \ __T; \ }) +#endif -#define u64_to_ptr(T, x) ({ \ - typecheck(u64, x); \ - (T *)(uintptr_t)(x); \ +/* + * check_user_mbz: Check that a user value exists and is zero + * + * Frequently in our uABI we reserve space for future extensions, and + * two ensure that userspace is prepared we enforce that space must + * be zero. (Then any future extension can safely assume a default value + * of 0.) + * + * check_user_mbz() combines checking that the user pointer is accessible + * and that the contained value is zero. + * + * Returns: -EFAULT if not accessible, -EINVAL if !zero, or 0 on success. + */ +#define check_user_mbz(U) ({ \ + typeof(*(U)) mbz__; \ + get_user(mbz__, (U)) ? -EFAULT : mbz__ ? -EINVAL : 0; \ }) #define __mask_next_bit(mask) ({ \ @@ -110,13 +99,35 @@ __idx; \ }) -#include <linux/list.h> +static inline bool is_power_of_2_u64(u64 n) +{ + return (n != 0 && ((n & (n - 1)) == 0)); +} -static inline void __list_del_many(struct list_head *head, - struct list_head *first) +void add_taint_for_CI(struct drm_i915_private *i915, unsigned int taint); +static inline void __add_taint_for_CI(unsigned int taint) { - first->prev = head; - WRITE_ONCE(head->next, first); + /* + * The system is "ok", just about surviving for the user, but + * CI results are now unreliable as the HW is very suspect. + * CI checks the taint state after every test and will reboot + * the machine if the kernel is tainted. + */ + add_taint(taint, LOCKDEP_STILL_OK); } +static inline bool i915_run_as_guest(void) +{ +#if IS_ENABLED(CONFIG_X86) + return !hypervisor_is_type(X86_HYPER_NATIVE); +#else + /* Not supported yet */ + return false; +#endif +} + +bool i915_vtd_active(struct drm_i915_private *i915); + +bool i915_direct_stolen_access(struct drm_i915_private *i915); + #endif /* !__I915_UTILS_H */ |