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25d140faaa
To enable later verification of GT workaround state at various stages of driver lifetime, we record the list of applicable ones per platforms to a list, from which they are also applied. The added data structure is a simple array of register, mask and value items, which is allocated on demand as workarounds are added to the list. This is a temporary implementation which later in the series gets fused with the existing per context workaround list handling. It is separated at this stage since the following patch fixes a bug which needs to be as easy to backport as possible. Also, since in the following patch we will be adding a new class of workarounds (per engine) which can be applied from interrupt context, we straight away make the provision for safe read-modify-write cycle. v2: * Change dev_priv to i915 along the init path. (Chris Wilson) * API rename. (Chris Wilson) v3: * Remove explicit list size tracking in favour of growing the allocation in power of two chunks. (Chris Wilson) v4: Chris Wilson: * Change wa_list_finish to early return. * Copy workarounds using the compiler for static checking. * Do not bother zeroing unused entries. * Re-order struct i915_wa_list. v5: * kmalloc_array. * Whitespace cleanup. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20181203133319.10174-1-tvrtko.ursulin@linux.intel.com
38 lines
787 B
C
38 lines
787 B
C
/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright © 2014-2018 Intel Corporation
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*/
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#ifndef _I915_WORKAROUNDS_H_
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#define _I915_WORKAROUNDS_H_
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#include <linux/slab.h>
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struct i915_wa {
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i915_reg_t reg;
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u32 mask;
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u32 val;
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};
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struct i915_wa_list {
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const char *name;
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struct i915_wa *list;
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unsigned int count;
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};
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static inline void intel_wa_list_free(struct i915_wa_list *wal)
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{
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kfree(wal->list);
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memset(wal, 0, sizeof(*wal));
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}
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int intel_ctx_workarounds_init(struct drm_i915_private *dev_priv);
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int intel_ctx_workarounds_emit(struct i915_request *rq);
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void intel_gt_init_workarounds(struct drm_i915_private *dev_priv);
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void intel_gt_apply_workarounds(struct drm_i915_private *dev_priv);
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void intel_whitelist_workarounds_apply(struct intel_engine_cs *engine);
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#endif
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