--- /dev/null
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2012-2013 LunarG, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Chia-I Wu <olv@lunarg.com>
+ */
+
+#include "intel_reg.h" /* for MI_xxx */
+#include "intel_winsys.h"
+
+#include "ilo_cp.h"
+
+/* the size of the private space */
+static const int ilo_cp_private = 2;
+
+/**
+ * Dump the contents of the parser bo. This must be called in a post-flush
+ * hook.
+ */
+void
+ilo_cp_dump(struct ilo_cp *cp)
+{
+ ilo_printf("dumping %d bytes\n", cp->used * 4);
+ if (cp->used)
+ cp->winsys->decode_commands(cp->winsys, cp->bo, cp->used * 4);
+}
+
+/**
+ * Save the command parser state for rewind.
+ *
+ * Note that this cannot rewind a flush, and the caller must make sure
+ * that does not happend.
+ */
+void
+ilo_cp_setjmp(struct ilo_cp *cp, struct ilo_cp_jmp_buf *jmp)
+{
+ jmp->id = pointer_to_intptr(cp->bo);
+
+ jmp->size = cp->size;
+ jmp->used = cp->used;
+ jmp->stolen = cp->stolen;
+ /* save reloc count to rewind ilo_cp_write_bo() */
+ jmp->reloc_count = cp->bo->get_reloc_count(cp->bo);
+}
+
+/**
+ * Rewind to the saved state.
+ */
+void
+ilo_cp_longjmp(struct ilo_cp *cp, const struct ilo_cp_jmp_buf *jmp)
+{
+ if (jmp->id != pointer_to_intptr(cp->bo)) {
+ assert(!"invalid use of CP longjmp");
+ return;
+ }
+
+ cp->size = jmp->size;
+ cp->used = jmp->used;
+ cp->stolen = jmp->stolen;
+ cp->bo->clear_relocs(cp->bo, jmp->reloc_count);
+}
+
+/**
+ * Clear the parser buffer.
+ */
+static void
+ilo_cp_clear_buffer(struct ilo_cp *cp)
+{
+ cp->cmd_cur = 0;
+ cp->cmd_end = 0;
+
+ cp->used = 0;
+ cp->stolen = 0;
+
+ /*
+ * Recalculate cp->size. This is needed not only because cp->stolen is
+ * reset above, but also that we added cp->reserve_for_pre_flush and
+ * ilo_cp_private to cp->size in ilo_cp_flush().
+ */
+ cp->size = cp->bo_size - (cp->reserve_for_pre_flush + ilo_cp_private);
+}
+
+/**
+ * Add MI_BATCH_BUFFER_END to the private space of the parser buffer.
+ */
+static void
+ilo_cp_end_buffer(struct ilo_cp *cp)
+{
+ /* make the private space available */
+ cp->size += ilo_cp_private;
+
+ assert(cp->used + 2 <= cp->size);
+
+ cp->ptr[cp->used++] = MI_BATCH_BUFFER_END;
+
+ /*
+ * From the Sandy Bridge PRM, volume 1 part 1, page 107:
+ *
+ * "The batch buffer must be QWord aligned and a multiple of QWords in
+ * length."
+ */
+ if (cp->used & 1)
+ cp->ptr[cp->used++] = MI_NOOP;
+}
+
+/**
+ * Upload the parser buffer to the bo.
+ */
+static int
+ilo_cp_upload_buffer(struct ilo_cp *cp)
+{
+ int err;
+
+ err = cp->bo->pwrite(cp->bo, 0, cp->used * 4, cp->ptr);
+ if (likely(!err && cp->stolen)) {
+ const int offset = cp->bo_size - cp->stolen;
+
+ err = cp->bo->pwrite(cp->bo, offset * 4,
+ cp->stolen * 4, &cp->ptr[offset]);
+ }
+
+ return err;
+}
+
+/**
+ * Reallocate the parser bo.
+ */
+static void
+ilo_cp_realloc_bo(struct ilo_cp *cp)
+{
+ struct intel_bo *bo;
+
+ /*
+ * allocate the new bo before unreferencing the old one so that they
+ * won't point at the same address, which is needed for jmpbuf
+ */
+ bo = cp->winsys->alloc_buffer(cp->winsys,
+ "batch buffer", cp->bo_size * 4, 0);
+ if (unlikely(!bo))
+ return;
+
+ if (cp->bo)
+ cp->bo->unreference(cp->bo);
+ cp->bo = bo;
+
+ if (!cp->sys) {
+ cp->bo->map(cp->bo, true);
+ cp->ptr = cp->bo->get_virtual(cp->bo);
+ }
+}
+
+/**
+ * Execute the parser bo.
+ */
+static int
+ilo_cp_exec_bo(struct ilo_cp *cp)
+{
+ const bool do_exec = !(ilo_debug & ILO_DEBUG_NOHW);
+ unsigned long flags;
+ int err;
+
+ switch (cp->ring) {
+ case ILO_CP_RING_RENDER:
+ flags = INTEL_EXEC_RENDER;
+ break;
+ case ILO_CP_RING_BLT:
+ flags = INTEL_EXEC_BLT;
+ break;
+ default:
+ flags = 0;
+ break;
+ }
+
+ if (likely(do_exec))
+ err = cp->bo->exec(cp->bo, cp->used * 4, cp->hw_ctx, flags);
+ else
+ err = 0;
+
+ return err;
+}
+
+static void
+ilo_cp_call_hook(struct ilo_cp *cp, enum ilo_cp_hook hook)
+{
+ const bool no_implicit_flush = cp->no_implicit_flush;
+
+ if (!cp->hooks[hook].func)
+ return;
+
+ /* no implicit flush in hooks */
+ cp->no_implicit_flush = true;
+ cp->hooks[hook].func(cp, cp->hooks[hook].data);
+
+ cp->no_implicit_flush = no_implicit_flush;
+}
+
+/**
+ * Flush the command parser and execute the commands. When the parser buffer
+ * is empty, the hooks are not invoked.
+ */
+void
+ilo_cp_flush(struct ilo_cp *cp)
+{
+ int err;
+
+ /* sanity check */
+ assert(cp->bo_size == cp->size +
+ cp->reserve_for_pre_flush + ilo_cp_private + cp->stolen);
+
+ if (!cp->used) {
+ ilo_cp_clear_buffer(cp);
+ return;
+ }
+
+ /* make the reserved space available temporarily */
+ cp->size += cp->reserve_for_pre_flush;
+ ilo_cp_call_hook(cp, ILO_CP_HOOK_PRE_FLUSH);
+
+ ilo_cp_end_buffer(cp);
+
+ if (cp->sys) {
+ err = ilo_cp_upload_buffer(cp);
+ if (likely(!err))
+ err = ilo_cp_exec_bo(cp);
+ }
+ else {
+ cp->bo->unmap(cp->bo);
+ err = ilo_cp_exec_bo(cp);
+ }
+
+ if (likely(!err)) {
+ ilo_cp_call_hook(cp, ILO_CP_HOOK_POST_FLUSH);
+ ilo_cp_clear_buffer(cp);
+ }
+ else {
+ /* reset first so that post-flush hook knows nothing was executed */
+ ilo_cp_clear_buffer(cp);
+ ilo_cp_call_hook(cp, ILO_CP_HOOK_POST_FLUSH);
+ }
+
+ ilo_cp_realloc_bo(cp);
+ ilo_cp_call_hook(cp, ILO_CP_HOOK_NEW_BATCH);
+}
+
+/**
+ * Destroy the command parser.
+ */
+void
+ilo_cp_destroy(struct ilo_cp *cp)
+{
+ if (cp->bo)
+ cp->bo->unreference(cp->bo);
+ if (cp->hw_ctx)
+ cp->winsys->destroy_context(cp->winsys, cp->hw_ctx);
+
+ FREE(cp->sys);
+ FREE(cp);
+}
+
+/**
+ * Create a command parser.
+ */
+struct ilo_cp *
+ilo_cp_create(struct intel_winsys *winsys, bool direct_map)
+{
+ struct ilo_cp *cp;
+
+ cp = CALLOC_STRUCT(ilo_cp);
+ if (!cp)
+ return NULL;
+
+ cp->winsys = winsys;
+ cp->hw_ctx = winsys->create_context(winsys);
+
+ cp->ring = ILO_CP_RING_RENDER;
+ cp->no_implicit_flush = false;
+ cp->reserve_for_pre_flush = 0;
+
+ memset(cp->hooks, 0, sizeof(cp->hooks));
+
+ cp->bo_size = 8192;
+
+ if (!direct_map) {
+ cp->sys = MALLOC(cp->bo_size * 4);
+ if (!cp->sys) {
+ FREE(cp);
+ return NULL;
+ }
+
+ cp->ptr = cp->sys;
+ }
+
+ ilo_cp_realloc_bo(cp);
+ if (!cp->bo) {
+ FREE(cp->sys);
+ FREE(cp);
+ return NULL;
+ }
+
+ ilo_cp_clear_buffer(cp);
+
+ return cp;
+}
--- /dev/null
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2012-2013 LunarG, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Chia-I Wu <olv@lunarg.com>
+ */
+
+#ifndef ILO_CP_H
+#define ILO_CP_H
+
+#include "intel_winsys.h"
+
+#include "ilo_common.h"
+
+struct ilo_cp;
+
+enum ilo_cp_ring {
+ ILO_CP_RING_RENDER,
+ ILO_CP_RING_BLT,
+
+ ILO_CP_RING_COUNT,
+};
+
+enum ilo_cp_hook {
+ ILO_CP_HOOK_NEW_BATCH,
+ ILO_CP_HOOK_PRE_FLUSH,
+ ILO_CP_HOOK_POST_FLUSH,
+
+ ILO_CP_HOOK_COUNT,
+};
+
+typedef void (*ilo_cp_hook_func)(struct ilo_cp *cp, void *data);
+
+/**
+ * Command parser.
+ */
+struct ilo_cp {
+ struct intel_winsys *winsys;
+ struct intel_context *hw_ctx;
+
+ enum ilo_cp_ring ring;
+ bool no_implicit_flush;
+ int reserve_for_pre_flush;
+
+ struct {
+ ilo_cp_hook_func func;
+ void *data;
+ } hooks[ILO_CP_HOOK_COUNT];
+
+ int bo_size;
+ struct intel_bo *bo;
+ uint32_t *sys;
+
+ uint32_t *ptr;
+ int size, used, stolen;
+
+ int cmd_cur, cmd_end;
+};
+
+/**
+ * Jump buffer to save command parser state for rewind.
+ */
+struct ilo_cp_jmp_buf {
+ intptr_t id;
+ int size, used, stolen;
+ int reloc_count;
+};
+
+struct ilo_cp *
+ilo_cp_create(struct intel_winsys *winsys, bool direct_map);
+
+void
+ilo_cp_destroy(struct ilo_cp *cp);
+
+void
+ilo_cp_flush(struct ilo_cp *cp);
+
+void
+ilo_cp_dump(struct ilo_cp *cp);
+
+void
+ilo_cp_setjmp(struct ilo_cp *cp, struct ilo_cp_jmp_buf *jmp);
+
+void
+ilo_cp_longjmp(struct ilo_cp *cp, const struct ilo_cp_jmp_buf *jmp);
+
+/**
+ * Return true if the parser buffer is empty.
+ */
+static inline bool
+ilo_cp_empty(struct ilo_cp *cp)
+{
+ return !cp->used;
+}
+
+/**
+ * Return the remaining space (in dwords) in the parser buffer.
+ */
+static inline int
+ilo_cp_space(struct ilo_cp *cp)
+{
+ return cp->size - cp->used;
+}
+
+/**
+ * Internal function called by functions that flush implicitly.
+ */
+static inline void
+ilo_cp_implicit_flush(struct ilo_cp *cp)
+{
+ if (cp->no_implicit_flush) {
+ assert(!"unexpected command parser flush");
+ /* discard the commands */
+ cp->used = 0;
+ }
+
+ ilo_cp_flush(cp);
+}
+
+/**
+ * Set the ring buffer.
+ */
+static inline void
+ilo_cp_set_ring(struct ilo_cp *cp, enum ilo_cp_ring ring)
+{
+ if (cp->ring != ring) {
+ ilo_cp_implicit_flush(cp);
+ cp->ring = ring;
+ }
+}
+
+/**
+ * Assert that no function should flush implicitly.
+ */
+static inline void
+ilo_cp_assert_no_implicit_flush(struct ilo_cp *cp, bool enable)
+{
+ cp->no_implicit_flush = enable;
+}
+
+/**
+ * Reserve the given size of space from the parser buffer. The reserved space
+ * will be made available temporarily for the pre-flush hook.
+ *
+ * \param reserve size in dwords to reserve. It may be negative.
+ */
+static inline void
+ilo_cp_reserve_for_pre_flush(struct ilo_cp *cp, int reserve)
+{
+ assert(cp->reserve_for_pre_flush + reserve >= 0);
+
+ if (cp->used > cp->size - reserve) {
+ ilo_cp_implicit_flush(cp);
+ assert(cp->used <= cp->size - reserve);
+ }
+
+ cp->size -= reserve;
+ cp->reserve_for_pre_flush += reserve;
+}
+
+/**
+ * Set a command parser hook.
+ */
+static inline void
+ilo_cp_set_hook(struct ilo_cp *cp, enum ilo_cp_hook hook,
+ ilo_cp_hook_func func, void *data)
+{
+ cp->hooks[hook].func = func;
+ cp->hooks[hook].data = data;
+}
+
+/**
+ * Begin writing a command.
+ */
+static inline void
+ilo_cp_begin(struct ilo_cp *cp, int cmd_size)
+{
+ if (cp->used + cmd_size > cp->size) {
+ ilo_cp_implicit_flush(cp);
+ assert(cp->used + cmd_size <= cp->size);
+ }
+
+ assert(cp->cmd_cur == cp->cmd_end);
+ cp->cmd_cur = cp->used;
+ cp->cmd_end = cp->cmd_cur + cmd_size;
+ cp->used = cp->cmd_end;
+}
+
+/**
+ * Begin writing data to a space stolen from the top of the parser buffer.
+ *
+ * \param desc informative description of the data to be written
+ * \param data_size in dwords
+ * \param align in dwords
+ * \param bo_offset in bytes to the stolen space
+ */
+static inline void
+ilo_cp_steal(struct ilo_cp *cp, const char *desc,
+ int data_size, int align, uint32_t *bo_offset)
+{
+ int pad, steal;
+
+ if (!align)
+ align = 1;
+
+ pad = (cp->bo_size - cp->stolen - data_size) % align;
+ steal = data_size + pad;
+
+ /* flush if there is not enough space after stealing */
+ if (cp->used > cp->size - steal) {
+ ilo_cp_implicit_flush(cp);
+
+ pad = (cp->bo_size - cp->stolen - data_size) % align;
+ steal = data_size + steal;
+
+ assert(cp->used <= cp->size - steal);
+ }
+
+ cp->size -= steal;
+ cp->stolen += steal;
+
+ assert(cp->cmd_cur == cp->cmd_end);
+ cp->cmd_cur = cp->bo_size - cp->stolen;
+ cp->cmd_end = cp->cmd_cur + data_size;
+
+ /* offset in cp->bo */
+ if (bo_offset)
+ *bo_offset = cp->cmd_cur * 4;
+}
+
+/**
+ * Write a dword to the parser buffer. This function must be enclosed by
+ * ilo_cp_begin()/ilo_cp_steal() and ilo_cp_end().
+ */
+static inline void
+ilo_cp_write(struct ilo_cp *cp, uint32_t val)
+{
+ assert(cp->cmd_cur < cp->cmd_end);
+ cp->ptr[cp->cmd_cur++] = val;
+}
+
+/**
+ * Write multiple dwords to the parser buffer.
+ */
+static inline void
+ilo_cp_write_multi(struct ilo_cp *cp, const void *vals, int num_vals)
+{
+ assert(cp->cmd_cur + num_vals <= cp->cmd_end);
+ memcpy(cp->ptr + cp->cmd_cur, vals, num_vals * 4);
+ cp->cmd_cur += num_vals;
+}
+
+/**
+ * Write a bo to the parser buffer. In addition to writing the offset of the
+ * bo to the buffer, it also emits a relocation.
+ */
+static inline void
+ilo_cp_write_bo(struct ilo_cp *cp, uint32_t val, struct intel_bo *bo,
+ uint32_t read_domains, uint32_t write_domain)
+{
+ if (bo) {
+ cp->bo->emit_reloc(cp->bo, cp->cmd_cur * 4,
+ bo, val, read_domains, write_domain);
+
+ ilo_cp_write(cp, val + bo->get_offset(bo));
+ }
+ else {
+ ilo_cp_write(cp, val);
+ }
+}
+
+/**
+ * End a command. Every ilo_cp_begin() or ilo_cp_steal() must have a
+ * matching ilo_cp_end().
+ */
+static inline void
+ilo_cp_end(struct ilo_cp *cp)
+{
+ assert(cp->cmd_cur == cp->cmd_end);
+}
+
+/**
+ * A variant of ilo_cp_steal() where the data are written via the returned
+ * pointer.
+ *
+ * \return ptr pointer where the data are written to. It is valid until any
+ * change is made to the parser.
+ */
+static inline void *
+ilo_cp_steal_ptr(struct ilo_cp *cp, const char *desc,
+ int data_size, int align, uint32_t *bo_offset)
+{
+ void *ptr;
+
+ ilo_cp_steal(cp, desc, data_size, align, bo_offset);
+
+ ptr = &cp->ptr[cp->cmd_cur];
+ cp->cmd_cur = cp->cmd_end;
+
+ ilo_cp_end(cp);
+
+ return ptr;
+}
+
+#endif /* ILO_CP_H */
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