gpu: nvgpu: Split out pramin code

Split out the pramin interface code in preparation for splitting
out the mem_desc code.

JIRA NVGPU-12

Change-Id: I3f03447ea213cc15669b0934fa706e7cb22599b7
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1323323
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 71 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/pramin_gk20a.c b/drivers/gpu/nvgpu/gk20a/pramin_gk20a.c
new file mode 100644
index 00000000..bed2e9b5
--- /dev/null
+++ b/drivers/gpu/nvgpu/gk20a/pramin_gk20a.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <nvgpu/page_allocator.h>
+
+#include "gk20a/gk20a.h"
+#include "gk20a/mm_gk20a.h"
+#include "gk20a/pramin_gk20a.h"
+
+#include <nvgpu/hw/gk20a/hw_bus_gk20a.h>
+#include <nvgpu/hw/gk20a/hw_pram_gk20a.h>
+
+/* WARNING: returns pramin_window_lock taken, complement with pramin_exit() */
+static u32 gk20a_pramin_enter(struct gk20a *g, struct mem_desc *mem,
+                              struct page_alloc_chunk *chunk, u32 w)
+{
+        u64 bufbase = chunk->base;
+        u64 addr = bufbase + w * sizeof(u32);
+        u32 hi = (u32)((addr & ~(u64)0xfffff)
+                >> bus_bar0_window_target_bar0_window_base_shift_v());
+        u32 lo = (u32)(addr & 0xfffff);
+        u32 win = gk20a_aperture_mask(g, mem,
+                        bus_bar0_window_target_sys_mem_noncoherent_f(),
+                        bus_bar0_window_target_vid_mem_f()) |
+                bus_bar0_window_base_f(hi);
+
+        gk20a_dbg(gpu_dbg_mem,
+                        "0x%08x:%08x begin for %p,%p at [%llx,%llx] (sz %llx)",
+                        hi, lo, mem, chunk, bufbase,
+                        bufbase + chunk->length, chunk->length);
+
+        WARN_ON(!bufbase);
+
+        nvgpu_spinlock_acquire(&g->mm.pramin_window_lock);
+
+        if (g->mm.pramin_window != win) {
+                gk20a_writel(g, bus_bar0_window_r(), win);
+                gk20a_readl(g, bus_bar0_window_r());
+                g->mm.pramin_window = win;
+        }
+
+        return lo;
+}
+
+static void gk20a_pramin_exit(struct gk20a *g, struct mem_desc *mem,
+                              struct page_alloc_chunk *chunk)
+{
+        gk20a_dbg(gpu_dbg_mem, "end for %p,%p", mem, chunk);
+
+        nvgpu_spinlock_release(&g->mm.pramin_window_lock);
+}
+
+void gk20a_init_pramin_ops(struct gpu_ops *gops)
+{
+        gops->pramin.enter = gk20a_pramin_enter;
+        gops->pramin.exit = gk20a_pramin_exit;
+        gops->pramin.data032_r = pram_data032_r;
+}