From cf4ce59b3b70238352c7f1729f0f7223214828ad Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 20 Sep 2024 01:46:19 +0000
Subject: [PATCH] rtl88x2CE_WiFi_linux add concurrent mode
---
kernel/arch/powerpc/include/asm/mmu_context.h | 58 +++++++++++++++++++++++++++++++++++++++++++---------------
1 files changed, 43 insertions(+), 15 deletions(-)
diff --git a/kernel/arch/powerpc/include/asm/mmu_context.h b/kernel/arch/powerpc/include/asm/mmu_context.h
index d93bdca..e02aa79 100644
--- a/kernel/arch/powerpc/include/asm/mmu_context.h
+++ b/kernel/arch/powerpc/include/asm/mmu_context.h
@@ -21,8 +21,11 @@
extern int isolate_lru_page(struct page *page); /* from internal.h */
extern bool mm_iommu_preregistered(struct mm_struct *mm);
-extern long mm_iommu_get(struct mm_struct *mm,
+extern long mm_iommu_new(struct mm_struct *mm,
unsigned long ua, unsigned long entries,
+ struct mm_iommu_table_group_mem_t **pmem);
+extern long mm_iommu_newdev(struct mm_struct *mm, unsigned long ua,
+ unsigned long entries, unsigned long dev_hpa,
struct mm_iommu_table_group_mem_t **pmem);
extern long mm_iommu_put(struct mm_struct *mm,
struct mm_iommu_table_group_mem_t *mem);
@@ -32,15 +35,24 @@
unsigned long ua, unsigned long size);
extern struct mm_iommu_table_group_mem_t *mm_iommu_lookup_rm(
struct mm_struct *mm, unsigned long ua, unsigned long size);
-extern struct mm_iommu_table_group_mem_t *mm_iommu_find(struct mm_struct *mm,
+extern struct mm_iommu_table_group_mem_t *mm_iommu_get(struct mm_struct *mm,
unsigned long ua, unsigned long entries);
extern long mm_iommu_ua_to_hpa(struct mm_iommu_table_group_mem_t *mem,
unsigned long ua, unsigned int pageshift, unsigned long *hpa);
extern long mm_iommu_ua_to_hpa_rm(struct mm_iommu_table_group_mem_t *mem,
unsigned long ua, unsigned int pageshift, unsigned long *hpa);
extern void mm_iommu_ua_mark_dirty_rm(struct mm_struct *mm, unsigned long ua);
+extern bool mm_iommu_is_devmem(struct mm_struct *mm, unsigned long hpa,
+ unsigned int pageshift, unsigned long *size);
extern long mm_iommu_mapped_inc(struct mm_iommu_table_group_mem_t *mem);
extern void mm_iommu_mapped_dec(struct mm_iommu_table_group_mem_t *mem);
+#else
+static inline bool mm_iommu_is_devmem(struct mm_struct *mm, unsigned long hpa,
+ unsigned int pageshift, unsigned long *size)
+{
+ return false;
+}
+static inline void mm_iommu_init(struct mm_struct *mm) { }
#endif
extern void switch_slb(struct task_struct *tsk, struct mm_struct *mm);
extern void set_context(unsigned long id, pgd_t *pgd);
@@ -82,7 +94,7 @@
{
int context_id;
- context_id = get_ea_context(&mm->context, ea);
+ context_id = get_user_context(&mm->context, ea);
if (!context_id)
return true;
return false;
@@ -173,6 +185,34 @@
dec_mm_active_cpus(mm);
}
}
+
+/*
+ * vas_windows counter shows number of open windows in the mm
+ * context. During context switch, use this counter to clear the
+ * foreign real address mapping (CP_ABORT) for the thread / process
+ * that intend to use COPY/PASTE. When a process closes all windows,
+ * disable CP_ABORT which is expensive to run.
+ *
+ * For user context, register a copro so that TLBIs are seen by the
+ * nest MMU. mm_context_add/remove_vas_window() are used only for user
+ * space windows.
+ */
+static inline void mm_context_add_vas_window(struct mm_struct *mm)
+{
+ atomic_inc(&mm->context.vas_windows);
+ mm_context_add_copro(mm);
+}
+
+static inline void mm_context_remove_vas_window(struct mm_struct *mm)
+{
+ int v;
+
+ mm_context_remove_copro(mm);
+ v = atomic_dec_if_positive(&mm->context.vas_windows);
+
+ /* Detect imbalance between add and remove */
+ WARN_ON(v < 0);
+}
#else
static inline void inc_mm_active_cpus(struct mm_struct *mm) { }
static inline void dec_mm_active_cpus(struct mm_struct *mm) { }
@@ -217,25 +257,13 @@
#endif
}
-#ifndef CONFIG_PPC_BOOK3S_64
-static inline void arch_exit_mmap(struct mm_struct *mm)
-{
-}
-#else
extern void arch_exit_mmap(struct mm_struct *mm);
-#endif
static inline void arch_unmap(struct mm_struct *mm,
- struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
if (start <= mm->context.vdso_base && mm->context.vdso_base < end)
mm->context.vdso_base = 0;
-}
-
-static inline void arch_bprm_mm_init(struct mm_struct *mm,
- struct vm_area_struct *vma)
-{
}
#ifdef CONFIG_PPC_MEM_KEYS
--
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