1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright © 2020 Intel Corporation 4 */ 5 6 #ifndef __GEN6_PPGTT_H__ 7 #define __GEN6_PPGTT_H__ 8 9 #include "intel_gtt.h" 10 11 struct i915_gem_ww_ctx; 12 13 struct gen6_ppgtt { 14 struct i915_ppgtt base; 15 16 struct mutex flush; 17 struct i915_vma *vma; 18 gen6_pte_t __iomem *pd_addr; 19 u32 pp_dir; 20 21 atomic_t pin_count; 22 struct mutex pin_mutex; 23 24 bool scan_for_unused_pt; 25 }; 26 27 static inline u32 gen6_pte_index(u32 addr) 28 { 29 return i915_pte_index(addr, GEN6_PDE_SHIFT); 30 } 31 32 static inline u32 gen6_pte_count(u32 addr, u32 length) 33 { 34 return i915_pte_count(addr, length, GEN6_PDE_SHIFT); 35 } 36 37 static inline u32 gen6_pde_index(u32 addr) 38 { 39 return i915_pde_index(addr, GEN6_PDE_SHIFT); 40 } 41 42 #define __to_gen6_ppgtt(base) container_of(base, struct gen6_ppgtt, base) 43 44 static inline struct gen6_ppgtt *to_gen6_ppgtt(struct i915_ppgtt *base) 45 { 46 BUILD_BUG_ON(offsetof(struct gen6_ppgtt, base)); 47 return __to_gen6_ppgtt(base); 48 } 49 50 /* 51 * gen6_for_each_pde() iterates over every pde from start until start+length. 52 * If start and start+length are not perfectly divisible, the macro will round 53 * down and up as needed. Start=0 and length=2G effectively iterates over 54 * every PDE in the system. The macro modifies ALL its parameters except 'pd', 55 * so each of the other parameters should preferably be a simple variable, or 56 * at most an lvalue with no side-effects! 57 */ 58 #define gen6_for_each_pde(pt, pd, start, length, iter) \ 59 for (iter = gen6_pde_index(start); \ 60 length > 0 && iter < I915_PDES && \ 61 (pt = i915_pt_entry(pd, iter), true); \ 62 ({ u32 temp = ALIGN(start + 1, 1 << GEN6_PDE_SHIFT); \ 63 temp = min(temp - start, length); \ 64 start += temp; length -= temp; }), ++iter) 65 66 #define gen6_for_all_pdes(pt, pd, iter) \ 67 for (iter = 0; \ 68 iter < I915_PDES && \ 69 (pt = i915_pt_entry(pd, iter), true); \ 70 ++iter) 71 72 int gen6_ppgtt_pin(struct i915_ppgtt *base, struct i915_gem_ww_ctx *ww); 73 void gen6_ppgtt_unpin(struct i915_ppgtt *base); 74 void gen6_ppgtt_unpin_all(struct i915_ppgtt *base); 75 void gen6_ppgtt_enable(struct intel_gt *gt); 76 void gen7_ppgtt_enable(struct intel_gt *gt); 77 struct i915_ppgtt *gen6_ppgtt_create(struct intel_gt *gt); 78 79 #endif 80