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-rw-r--r--src/blitter/ntapi_blt_alloc.c149
-rw-r--r--src/blitter/ntapi_blt_block.c204
-rw-r--r--src/blitter/ntapi_blt_free.c48
3 files changed, 401 insertions, 0 deletions
diff --git a/src/blitter/ntapi_blt_alloc.c b/src/blitter/ntapi_blt_alloc.c
new file mode 100644
index 0000000..4ba6f2c
--- /dev/null
+++ b/src/blitter/ntapi_blt_alloc.c
@@ -0,0 +1,149 @@
+/********************************************************/
+/* ntapi: Native API core library */
+/* Copyright (C) 2013,2014,2015 Z. Gilboa */
+/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
+/********************************************************/
+
+#include <ntapi/nt_status.h>
+#include <ntapi/nt_blitter.h>
+#include <ntapi/nt_sync.h>
+#include <ntapi/ntapi.h>
+#include <ntapi/nt_atomic.h>
+#include "ntapi_blitter.h"
+#include "ntapi_impl.h"
+
+static int __blt_popcount(uintptr_t mask)
+{
+ /* todo: check cpuid, use at_popcount */
+ int i,ret;
+
+ for (i=0,ret=0; i<8*sizeof(uintptr_t); i++)
+ if (mask & ((uintptr_t)1<<i))
+ ret++;
+
+ return ret;
+}
+
+
+int32_t __fastcall __ntapi_blt_alloc(
+ __out nt_blitter ** blitter,
+ __in nt_blitter_params * params)
+{
+ int32_t status;
+ nt_blitter * blt_ctx;
+ size_t blt_ctx_size;
+ size_t params_size;
+ size_t ptrs,i;
+
+ /* alignment */
+ if ((params->block_size % sizeof(uintptr_t)) || (params->block_count % sizeof(uintptr_t)))
+ return NT_STATUS_INVALID_PARAMETER;
+
+ /* blt control block allocation */
+ ptrs = params->block_count / (8 * sizeof(uintptr_t));
+ blt_ctx = (nt_blitter *)0;
+ blt_ctx_size = (size_t)&((nt_blitter *)0)->bits;
+
+ /* user-provided bitmap? */
+ if (!params->bitmap)
+ blt_ctx_size += ptrs * sizeof(uintptr_t);
+
+ /* alloc */
+ status = __ntapi->zw_allocate_virtual_memory(
+ NT_CURRENT_PROCESS_HANDLE,
+ (void **)&blt_ctx,
+ 0,
+ &blt_ctx_size,
+ NT_MEM_COMMIT,
+ NT_PAGE_READWRITE);
+
+ if (status) return (status);
+
+ /* init control block */
+ __ntapi->tt_aligned_block_memset(
+ blt_ctx,
+ 0,(size_t)&((nt_blitter *)0)->bits);
+
+ blt_ctx->addr = blt_ctx;
+ blt_ctx->size = blt_ctx_size;
+ blt_ctx->ptrs = ptrs;
+
+ /* init bitmap */
+ blt_ctx->bitmap = params->bitmap
+ ? (uintptr_t *)params->bitmap
+ : blt_ctx->bits;
+
+ if (!(params->flags & NT_BLITTER_PRESERVE_BITS))
+ __ntapi->tt_aligned_block_memset(
+ blt_ctx->bitmap,
+ (intptr_t)0xFFFFFFFFFFFFFFFF,
+ ptrs * sizeof(uintptr_t));
+
+ /* info structure */
+ blt_ctx->info.info_size = sizeof(nt_blitter_info);
+ blt_ctx->info.block_count = params->block_count;
+ blt_ctx->info.block_size = params->block_size;
+
+ if (params->flags & NT_BLITTER_ENABLE_BLOCK_ARRAY)
+ /* allocate in place */
+ blt_ctx->info.region_size = params->block_count * params->block_size;
+ else
+ /* use pointer array */
+ blt_ctx->info.region_size = params->block_count * sizeof(uintptr_t);
+
+ /* allocate region */
+ if (params->region)
+ blt_ctx->info.region_addr = params->region;
+ else
+ status = __ntapi->zw_allocate_virtual_memory(
+ NT_CURRENT_PROCESS_HANDLE,
+ &blt_ctx->info.region_addr,
+ 0,
+ &blt_ctx->info.region_size,
+ NT_MEM_COMMIT,
+ NT_PAGE_READWRITE);
+
+ if (status) {
+ __ntapi->blt_free(blt_ctx);
+ return status;
+ }
+
+ if (params->flags & NT_BLITTER_PRESERVE_BITS)
+ for (i=0,blt_ctx->info.blocks_avail=0; i<ptrs; i++)
+ blt_ctx->info.blocks_avail += __blt_popcount(blt_ctx->bitmap[i]);
+ else
+ blt_ctx->info.blocks_avail = params->block_count;
+
+ if (params->flags & NT_BLITTER_ENABLE_BLOCK_ARRAY)
+ blt_ctx->info.blocks_cached = params->block_count;
+
+ /* init block array */
+ if (!params->region)
+ __ntapi->tt_aligned_block_memset(
+ blt_ctx->info.region_addr,
+ 0,blt_ctx->info.region_size);
+
+ /* copy params */
+ if (params->params_size < sizeof(nt_blitter_params))
+ params_size = params->params_size;
+ else
+ params_size = sizeof(nt_blitter_params);
+
+ __ntapi->tt_aligned_block_memcpy(
+ (uintptr_t *)&blt_ctx->params,
+ (uintptr_t *)params,
+ params_size);
+
+ /* update params */
+ blt_ctx->params.lock_tries = params->lock_tries
+ ? params->lock_tries
+ : __NT_BLITTER_DEFAULT_LOCK_TRIES;
+
+ blt_ctx->params.round_trips = params->round_trips
+ ? params->round_trips
+ : __NT_BLITTER_DEFAULT_ROUND_TRIPS;
+
+ *blitter = blt_ctx;
+
+ return NT_STATUS_SUCCESS;
+}
diff --git a/src/blitter/ntapi_blt_block.c b/src/blitter/ntapi_blt_block.c
new file mode 100644
index 0000000..879eb1b
--- /dev/null
+++ b/src/blitter/ntapi_blt_block.c
@@ -0,0 +1,204 @@
+/********************************************************/
+/* ntapi: Native API core library */
+/* Copyright (C) 2013,2014,2015 Z. Gilboa */
+/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
+/********************************************************/
+
+#include <ntapi/nt_status.h>
+#include <ntapi/nt_blitter.h>
+#include <ntapi/nt_sync.h>
+#include <ntapi/ntapi.h>
+#include <ntapi/nt_atomic.h>
+#include "ntapi_blitter.h"
+#include "ntapi_impl.h"
+
+static int32_t __fastcall __blt_bitbite(
+ __in nt_blitter * blitter,
+ __in unsigned int bit,
+ __in size_t byte)
+{
+ uint32_t locktry;
+ uintptr_t test;
+ uintptr_t cmp;
+ uintptr_t xchg;
+ uintptr_t mask;
+
+ mask = ((uintptr_t)1 << bit);
+ locktry = blitter->params.lock_tries;
+
+ for (; locktry; locktry--) {
+ cmp = blitter->bitmap[byte] | mask;
+ xchg = cmp ^ mask;
+
+ test = at_locked_cas(
+ (intptr_t *)&blitter->bitmap[byte],
+ cmp,xchg);
+
+ if (test == cmp) {
+ at_locked_dec(&blitter->info.blocks_avail);
+ at_locked_inc(&blitter->info.blocks_used);
+ return NT_STATUS_SUCCESS;
+
+ } else if (test ^ mask)
+ return NT_STATUS_TRANSACTIONAL_CONFLICT;
+ }
+
+ if (!locktry) {
+ blitter->info.busy = 1;
+ blitter->info.lock_tries = blitter->params.lock_tries;
+ return NT_STATUS_DEVICE_BUSY;
+ }
+
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
+}
+
+static int32_t __fastcall __blt_acquire(
+ __in nt_blitter * blitter,
+ __out intptr_t * blkid)
+{
+ unsigned int bit;
+ uintptr_t i,n;
+
+ if (blitter->info.blocks_avail == 0)
+ return NT_STATUS_ALLOCATE_BUCKET;
+
+ for (n=0,bit=0; blitter->info.blocks_avail && (n < blitter->params.round_trips); n++) {
+ for (i=*blkid/(8*sizeof(size_t)); (i<blitter->ptrs); i++)
+ if (at_bsf(&bit,blitter->bitmap[i]))
+ break;
+
+ if (i == blitter->ptrs)
+ return NT_STATUS_ALLOCATE_BUCKET;
+
+ switch (__blt_bitbite(blitter,bit,i)) {
+ case NT_STATUS_SUCCESS:
+ *blkid = bit + (i * 8 * sizeof(size_t));
+ return NT_STATUS_SUCCESS;
+
+ case NT_STATUS_DEVICE_BUSY:
+ return NT_STATUS_DEVICE_BUSY;
+
+ default:
+ break;
+ }
+ }
+
+ return NT_STATUS_ALLOCATE_BUCKET;
+}
+
+
+int32_t __fastcall __ntapi_blt_obtain(
+ __in nt_blitter * blitter,
+ __out intptr_t * blkid)
+{
+ unsigned int bit;
+ uintptr_t i,n;
+ uintptr_t mask;
+
+ if (blitter->info.blocks_avail == 0)
+ return NT_STATUS_ALLOCATE_BUCKET;
+ else if ((bit = *blkid % sizeof(size_t)) == 0)
+ return __ntapi_blt_acquire(blitter,blkid);
+
+ for (n=0,mask=(uintptr_t)-1; n<bit; n++)
+ mask ^= ((size_t)1 << n);
+
+ i = *blkid / (8*sizeof(size_t));
+
+ for (n=0; blitter->info.blocks_avail && (n < blitter->params.round_trips); n++) {
+ if (!(at_bsf(&bit,(mask & blitter->bitmap[i]))))
+ break;
+
+ switch (__blt_bitbite(blitter,bit,i)) {
+ case NT_STATUS_SUCCESS:
+ *blkid = bit + (i * 8 * sizeof(size_t));
+ return NT_STATUS_SUCCESS;
+
+ case NT_STATUS_DEVICE_BUSY:
+ return NT_STATUS_DEVICE_BUSY;
+
+ default:
+ break;
+ }
+ }
+
+ *blkid = ++i * 8 * sizeof(size_t);
+ return __blt_acquire(blitter,blkid);
+}
+
+
+int32_t __fastcall __ntapi_blt_possess(
+ __in nt_blitter * blitter,
+ __out intptr_t * blkid)
+{
+ int bit;
+ size_t byte;
+ uintptr_t test;
+ uintptr_t mask;
+
+ bit = *blkid % (8*sizeof(size_t));
+ byte = *blkid / (8*sizeof(size_t));
+
+ mask = ((uintptr_t)1 << bit);
+ test = at_locked_and(
+ (intptr_t *)&blitter->bitmap[byte],
+ ~mask);
+
+ if (test & mask) {
+ at_locked_dec(&blitter->info.blocks_avail);
+ at_locked_inc(&blitter->info.blocks_used);
+ }
+
+ return NT_STATUS_SUCCESS;
+}
+
+
+int32_t __fastcall __ntapi_blt_acquire(
+ __in nt_blitter * blitter,
+ __out intptr_t * blkid)
+{
+ *blkid = 0;
+ return __blt_acquire(blitter,blkid);
+}
+
+
+int32_t __fastcall __ntapi_blt_release(
+ __in nt_blitter * blitter,
+ __out intptr_t blkid)
+{
+ size_t i;
+ unsigned int idx;
+ uintptr_t bit;
+
+ i = blkid / (8 * sizeof(uintptr_t));
+ idx = blkid % (8 * sizeof(uintptr_t));
+ bit = ((uintptr_t)1 << idx);
+
+ at_locked_or((intptr_t *)&blitter->bitmap[i],bit);
+ at_locked_dec(&blitter->info.blocks_used);
+ at_locked_inc(&blitter->info.blocks_avail);
+
+ return NT_STATUS_SUCCESS;
+}
+
+
+void * __fastcall __ntapi_blt_get(
+ __in const nt_blitter * blitter,
+ __in intptr_t block_id)
+{
+ size_t * addr = (size_t *)blitter->info.region_addr;
+ addr += block_id;
+ return addr;
+}
+
+
+void __fastcall __ntapi_blt_set(
+ __in const nt_blitter * blitter,
+ __in intptr_t block_id,
+ __in void * val)
+{
+ size_t * addr = (size_t *)blitter->info.region_addr;
+ addr += block_id;
+ *addr = (size_t)val;
+ return;
+}
diff --git a/src/blitter/ntapi_blt_free.c b/src/blitter/ntapi_blt_free.c
new file mode 100644
index 0000000..a5956b1
--- /dev/null
+++ b/src/blitter/ntapi_blt_free.c
@@ -0,0 +1,48 @@
+/********************************************************/
+/* ntapi: Native API core library */
+/* Copyright (C) 2013,2014,2015 Z. Gilboa */
+/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
+/********************************************************/
+
+#include <ntapi/nt_status.h>
+#include <ntapi/nt_blitter.h>
+#include <ntapi/nt_sync.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_blitter.h"
+#include "ntapi_impl.h"
+
+int32_t __fastcall __ntapi_blt_free(nt_blitter * blt_ctx)
+{
+ int32_t status;
+ void * region_addr;
+ size_t region_size;
+
+ /* validation */
+ if (!blt_ctx) return NT_STATUS_INVALID_PARAMETER;
+
+ /* free blt block */
+ region_addr = blt_ctx->info.region_addr;
+ region_size = blt_ctx->info.region_size;
+
+ if (region_size && !blt_ctx->params.region) {
+ status = __ntapi->zw_free_virtual_memory(
+ NT_CURRENT_PROCESS_HANDLE,
+ &region_addr,
+ &region_size,
+ NT_MEM_RELEASE);
+
+ if (status) return status;
+ }
+
+ /* free blt control block */
+ region_addr = blt_ctx->addr;
+ region_size = blt_ctx->size;
+
+ status = __ntapi->zw_free_virtual_memory(
+ NT_CURRENT_PROCESS_HANDLE,
+ &region_addr,
+ &region_size,
+ NT_MEM_RELEASE);
+
+ return status;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 03:20:15 +0000