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 23 bool scan_for_unused_pt; 24 }; 25 26 static inline u32 gen6_pte_index(u32 addr) 27 { 28 return i915_pte_index(addr, GEN6_PDE_SHIFT); 29 } 30 31 static inline u32 gen6_pte_count(u32 addr, u32 length) 32 { 33 return i915_pte_count(addr, length, GEN6_PDE_SHIFT); 34 } 35 36 static inline u32 gen6_pde_index(u32 addr) 37 { 38 return i915_pde_index(addr, GEN6_PDE_SHIFT); 39 } 40 41 #define __to_gen6_ppgtt(base) container_of(base, struct gen6_ppgtt, base) 42 43 static inline struct gen6_ppgtt *to_gen6_ppgtt(struct i915_ppgtt *base) 44 { 45 BUILD_BUG_ON(offsetof(struct gen6_ppgtt, base)); 46 return __to_gen6_ppgtt(base); 47 } 48 49 /* 50 * gen6_for_each_pde() iterates over every pde from start until start+length. 51 * If start and start+length are not perfectly divisible, the macro will round 52 * down and up as needed. Start=0 and length=2G effectively iterates over 53 * every PDE in the system. The macro modifies ALL its parameters except 'pd', 54 * so each of the other parameters should preferably be a simple variable, or 55 * at most an lvalue with no side-effects! 56 */ 57 #define gen6_for_each_pde(pt, pd, start, length, iter) \ 58 for (iter = gen6_pde_index(start); \ 59 length > 0 && iter < I915_PDES && \ 60 (pt = i915_pt_entry(pd, iter), true); \ 61 ({ u32 temp = ALIGN(start + 1, 1 << GEN6_PDE_SHIFT); \ 62 temp = min(temp - start, length); \ 63 start += temp; length -= temp; }), ++iter) 64 65 #define gen6_for_all_pdes(pt, pd, iter) \ 66 for (iter = 0; \ 67 iter < I915_PDES && \ 68 (pt = i915_pt_entry(pd, iter), true); \ 69 ++iter) 70 71 int gen6_ppgtt_pin(struct i915_ppgtt *base, struct i915_gem_ww_ctx *ww); 72 void gen6_ppgtt_unpin(struct i915_ppgtt *base); 73 void gen6_ppgtt_enable(struct intel_gt *gt); 74 void gen7_ppgtt_enable(struct intel_gt *gt); 75 struct i915_ppgtt *gen6_ppgtt_create(struct intel_gt *gt); 76 77 #endif 78