1 files changed, 460 insertions, 0 deletions

diff --git a/shared-core/radeon_ms_bus.c b/shared-core/radeon_ms_bus.c
new file mode 100644
index 00000000..ed8fb211
--- /dev/null
+++ b/shared-core/radeon_ms_bus.c
@@ -0,0 +1,460 @@
+/*
+ * Copyright 2007 Jérôme Glisse
+ * Copyright 2007 Alex Deucher
+ * Copyright 2007 Dave Airlie
+ * All Rights Reserved.
+ * 
+ * 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ */
+/*
+ * Authors:
+ *    Dave Airlie <airlied@linux.ie>
+ *    Jerome Glisse <glisse@freedesktop.org>
+ */
+#include "drmP.h"
+#include "drm.h"
+#include "radeon_ms.h"
+
+struct radeon_pcie {
+	uint32_t                    gart_table_size;
+	struct drm_buffer_object    *gart_table_object;
+	volatile uint32_t           *gart_table;
+	struct drm_device           *dev;
+	unsigned long               page_last;
+};
+
+struct radeon_pcie_gart {
+	struct drm_ttm_backend  backend;
+	struct radeon_pcie      *pcie;
+	unsigned long           page_first;
+	struct page             **pages;
+	struct page             *dummy_read_page;
+	unsigned long           num_pages;
+	int                     populated;
+	int                     bound;
+};
+
+static int pcie_ttm_bind(struct drm_ttm_backend *backend,
+			 struct drm_bo_mem_reg *bo_mem);
+static void pcie_ttm_clear(struct drm_ttm_backend *backend);
+static void pcie_ttm_destroy(struct drm_ttm_backend *backend);
+static int pcie_ttm_needs_ub_cache_adjust(struct drm_ttm_backend *backend);
+static int pcie_ttm_populate(struct drm_ttm_backend *backend,
+			     unsigned long num_pages, struct page **pages,
+			     struct page *dummy_read_page);
+static int pcie_ttm_unbind(struct drm_ttm_backend *backend);
+
+static struct drm_ttm_backend_func radeon_pcie_gart_ttm_backend = 
+{
+	.needs_ub_cache_adjust = pcie_ttm_needs_ub_cache_adjust,
+	.populate = pcie_ttm_populate,
+	.clear = pcie_ttm_clear,
+	.bind = pcie_ttm_bind,
+	.unbind = pcie_ttm_unbind,
+	.destroy =  pcie_ttm_destroy,
+};
+
+static void pcie_gart_flush(struct radeon_pcie *pcie)
+{
+	struct drm_device *dev;
+	struct drm_radeon_private *dev_priv;
+	uint32_t flush;
+
+	if (pcie == NULL) {
+		return;
+	}
+	dev = pcie->dev;
+	dev_priv = dev->dev_private;
+	flush = dev_priv->driver_state.pcie_tx_gart_cntl;
+	flush |= PCIE_TX_GART_CNTL__GART_INVALIDATE_TLB;
+	PCIE_W(PCIE_TX_GART_CNTL, flush);
+	PCIE_W(PCIE_TX_GART_CNTL, dev_priv->driver_state.pcie_tx_gart_cntl);
+}
+
+static __inline__ uint32_t pcie_gart_get_page_base(struct radeon_pcie *pcie,
+						   unsigned long page)
+{
+	if (pcie == NULL || pcie->gart_table == NULL) {
+		return 0;
+	}
+	return ((pcie->gart_table[page] & (~0xC)) << 8);
+}
+
+static __inline__ void pcie_gart_set_page_base(struct radeon_pcie *pcie,
+					       unsigned long page,
+					       uint32_t page_base)
+{
+	if (pcie == NULL || pcie->gart_table == NULL) {
+		return;
+	}
+	pcie->gart_table[page] = cpu_to_le32((page_base >> 8) | 0xC);
+}
+
+static int pcie_ttm_bind(struct drm_ttm_backend *backend,
+			 struct drm_bo_mem_reg *bo_mem)
+{
+	struct radeon_pcie_gart *pcie_gart;
+	unsigned long page_first;
+	unsigned long page_last;
+	unsigned long page, i;
+	uint32_t page_base;
+
+	pcie_gart = container_of(backend, struct radeon_pcie_gart, backend);
+	page = page_first = bo_mem->mm_node->start;
+	page_last = page_first + pcie_gart->num_pages;
+	if (page_first >= pcie_gart->pcie->page_last ||
+	    page_last >= pcie_gart->pcie->page_last)
+	    return -EINVAL;
+        while (page < page_last) {
+		if (pcie_gart_get_page_base(pcie_gart->pcie, page)) {
+			return -EBUSY;
+		}
+                page++;
+        }
+
+        for (i = 0, page = page_first; i < pcie_gart->num_pages; i++, page++) {
+		struct page *cur_page = pcie_gart->pages[i];
+
+		if (!page) {
+			cur_page = pcie_gart->dummy_read_page;
+		}
+                /* write value */
+		page_base = page_to_phys(cur_page);
+		pcie_gart_set_page_base(pcie_gart->pcie, page, page_base);
+        }
+	DRM_MEMORYBARRIER();
+	pcie_gart_flush(pcie_gart->pcie);
+	pcie_gart->bound = 1;
+	pcie_gart->page_first = page_first;
+	return 0;
+}
+
+static void pcie_ttm_clear(struct drm_ttm_backend *backend)
+{
+	struct radeon_pcie_gart *pcie_gart;
+
+	pcie_gart = container_of(backend, struct radeon_pcie_gart, backend);
+	if (pcie_gart->pages) {
+		backend->func->unbind(backend);
+		pcie_gart->pages = NULL;
+	}
+	pcie_gart->num_pages = 0;
+}
+
+static void pcie_ttm_destroy(struct drm_ttm_backend *backend)
+{
+	struct radeon_pcie_gart *pcie_gart;
+
+	if (backend == NULL) {
+		return;
+	}
+	pcie_gart = container_of(backend, struct radeon_pcie_gart, backend);
+	if (pcie_gart->pages) {
+		backend->func->clear(backend);
+	}
+	drm_ctl_free(pcie_gart, sizeof(*pcie_gart), DRM_MEM_TTM);
+}
+
+static int pcie_ttm_needs_ub_cache_adjust(struct drm_ttm_backend *backend)
+{
+	return ((backend->flags & DRM_BE_FLAG_BOUND_CACHED) ? 0 : 1);
+}
+
+static int pcie_ttm_populate(struct drm_ttm_backend *backend,
+			     unsigned long num_pages, struct page **pages,
+			     struct page *dummy_read_page)
+{
+	struct radeon_pcie_gart *pcie_gart;
+
+	pcie_gart = container_of(backend, struct radeon_pcie_gart, backend);
+	pcie_gart->pages = pages;
+	pcie_gart->num_pages = num_pages;
+	pcie_gart->populated = 1;
+	return 0;
+}
+
+static int pcie_ttm_unbind(struct drm_ttm_backend *backend)
+{
+	struct radeon_pcie_gart *pcie_gart;
+	unsigned long page, i;
+
+	pcie_gart = container_of(backend, struct radeon_pcie_gart, backend);
+	if (pcie_gart->bound != 1 || pcie_gart->pcie->gart_table == NULL) {
+		return -EINVAL;
+	}
+	for (i = 0, page = pcie_gart->page_first; i < pcie_gart->num_pages;
+	     i++, page++) {
+	     	pcie_gart->pcie->gart_table[page] = 0;
+	}
+	pcie_gart_flush(pcie_gart->pcie);
+	pcie_gart->bound = 0;
+	pcie_gart->page_first = 0;
+	return 0;
+}
+
+int radeon_ms_agp_finish(struct drm_device *dev)
+{
+	struct drm_radeon_private *dev_priv = dev->dev_private;
+
+	if (!dev_priv->bus_ready) {
+		return 0;
+	}
+	dev_priv->bus_ready = 0;
+	drm_agp_release(dev);
+	return 0;
+}
+
+int radeon_ms_agp_init(struct drm_device *dev)
+{
+	struct drm_radeon_private *dev_priv = dev->dev_private;
+	struct radeon_state *state = &dev_priv->driver_state;
+	struct drm_agp_mode mode;
+	uint32_t agp_status;
+	int ret;
+
+	dev_priv->bus_ready = -1;
+	if (dev->agp == NULL) {
+		DRM_ERROR("[radeon_ms] can't initialize AGP\n");
+		return -EINVAL;
+	}
+	ret = drm_agp_acquire(dev);
+	if (ret) {
+		DRM_ERROR("[radeon_ms] error failed to acquire agp\n");
+		return ret;
+	}
+	agp_status = MMIO_R(AGP_STATUS);
+	if ((AGP_STATUS__MODE_AGP30 & agp_status)) {
+		mode.mode = AGP_STATUS__RATE4X;
+	} else {
+		mode.mode = AGP_STATUS__RATE2X_8X;
+	}
+	ret = drm_agp_enable(dev, mode);
+	if (ret) {
+		DRM_ERROR("[radeon_ms] error failed to enable agp\n");
+		return ret;
+	}
+	state->agp_command = MMIO_R(AGP_COMMAND) | AGP_COMMAND__AGP_EN;
+	state->agp_command &= ~AGP_COMMAND__FW_EN;
+	state->agp_command &= ~AGP_COMMAND__MODE_4G_EN;
+	state->aic_ctrl = 0;
+	state->agp_base = REG_S(AGP_BASE, AGP_BASE_ADDR, dev->agp->base);
+	state->agp_base_2 = 0;
+	state->bus_cntl = MMIO_R(BUS_CNTL);
+	state->bus_cntl &= ~BUS_CNTL__BUS_MASTER_DIS;
+	state->mc_agp_location =
+		REG_S(MC_AGP_LOCATION, MC_AGP_START,
+				dev_priv->gpu_gart_start >> 16) |
+		REG_S(MC_AGP_LOCATION, MC_AGP_TOP,
+				dev_priv->gpu_gart_end >> 16);
+	DRM_INFO("[radeon_ms] gpu agp base 0x%08X\n", MMIO_R(AGP_BASE));
+	DRM_INFO("[radeon_ms] gpu agp location 0x%08X\n",
+		 MMIO_R(MC_AGP_LOCATION));
+	DRM_INFO("[radeon_ms] gpu agp location 0x%08X\n",
+		 state->mc_agp_location);
+	DRM_INFO("[radeon_ms] bus ready\n");
+	dev_priv->bus_ready = 1;
+	return 0;
+}
+
+void radeon_ms_agp_restore(struct drm_device *dev, struct radeon_state *state)
+{
+	struct drm_radeon_private *dev_priv = dev->dev_private;
+
+	MMIO_W(MC_AGP_LOCATION, state->mc_agp_location);
+	MMIO_W(AGP_BASE, state->agp_base);
+	MMIO_W(AGP_BASE_2, state->agp_base_2);
+	MMIO_W(AGP_COMMAND, state->agp_command);
+}
+
+void radeon_ms_agp_save(struct drm_device *dev, struct radeon_state *state)
+{
+	struct drm_radeon_private *dev_priv = dev->dev_private;
+
+	state->agp_command = MMIO_R(AGP_COMMAND);
+	state->agp_base = MMIO_R(AGP_BASE);
+	state->agp_base_2 = MMIO_R(AGP_BASE_2);
+	state->mc_agp_location = MMIO_R(MC_AGP_LOCATION);
+}
+
+struct drm_ttm_backend *radeon_ms_pcie_create_ttm(struct drm_device *dev)
+{
+	struct drm_radeon_private *dev_priv = dev->dev_private;
+	struct radeon_pcie_gart *pcie_gart;
+
+	pcie_gart = drm_ctl_calloc(1, sizeof (*pcie_gart), DRM_MEM_TTM);
+	if (pcie_gart == NULL) {
+		return NULL;
+	}
+	memset(pcie_gart, 0, sizeof(struct radeon_pcie_gart));
+	pcie_gart->populated = 0;
+	pcie_gart->pcie = dev_priv->bus;
+	pcie_gart->backend.func = &radeon_pcie_gart_ttm_backend;
+
+	return &pcie_gart->backend;
+}
+
+int radeon_ms_pcie_finish(struct drm_device *dev)
+{
+	struct drm_radeon_private *dev_priv = dev->dev_private;
+	struct radeon_pcie *pcie = dev_priv->bus;
+
+	if (!dev_priv->bus_ready || pcie == NULL) {
+		dev_priv->bus_ready = 0;
+		return 0;
+	}
+	dev_priv->bus_ready = 0;
+	if (pcie->gart_table) {
+		drm_mem_reg_iounmap(dev, &pcie->gart_table_object->mem,
+				    (void *)pcie->gart_table);
+	}
+	pcie->gart_table = NULL;
+	if (pcie->gart_table_object) {
+		mutex_lock(&dev->struct_mutex);
+		drm_bo_usage_deref_locked(&pcie->gart_table_object);
+		mutex_unlock(&dev->struct_mutex);
+	}
+	dev_priv->bus = NULL;
+	drm_free(pcie, sizeof(*pcie), DRM_MEM_DRIVER);
+	return 0;
+}
+
+int radeon_ms_pcie_init(struct drm_device *dev)
+{
+	struct drm_radeon_private *dev_priv = dev->dev_private;
+	struct radeon_state *state = &dev_priv->driver_state;
+	struct radeon_pcie *pcie;
+	int ret = 0;
+
+	dev_priv->bus_ready = -1;
+	/* allocate and clear device private structure */
+	pcie = drm_alloc(sizeof(struct radeon_pcie), DRM_MEM_DRIVER);
+	if (pcie == NULL) {
+		return -ENOMEM;
+	}
+	memset(pcie, 0, sizeof(struct radeon_pcie));
+	pcie->dev = dev;
+	dev_priv->bus = (void *)pcie;
+	pcie->gart_table_size = (dev_priv->gpu_gart_size / RADEON_PAGE_SIZE) *
+				4;
+	/* gart table start must be aligned on 16bytes, align it on one page */
+	ret = drm_buffer_object_create(dev,
+				       pcie->gart_table_size,
+				       drm_bo_type_kernel,
+				       DRM_BO_FLAG_READ |
+				       DRM_BO_FLAG_WRITE |
+				       DRM_BO_FLAG_MEM_VRAM |
+				       DRM_BO_FLAG_NO_EVICT,
+				       DRM_BO_HINT_DONT_FENCE,
+				       1,
+				       0,
+				       &pcie->gart_table_object);
+	if (ret) {
+		return ret;
+	}
+	ret = drm_mem_reg_ioremap(dev, &pcie->gart_table_object->mem,
+				  (void **) &pcie->gart_table);
+	if (ret) {
+		DRM_ERROR("[radeon_ms] error mapping gart table: %d\n", ret);
+		return ret;
+	}
+	DRM_INFO("[radeon_ms] gart table in vram at 0x%08lX\n",
+		 pcie->gart_table_object->offset);
+	memset((void *)pcie->gart_table, 0, pcie->gart_table_size);
+	pcie->page_last = pcie->gart_table_size >> 2;
+	state->pcie_tx_gart_discard_rd_addr_lo =
+		REG_S(PCIE_TX_GART_DISCARD_RD_ADDR_LO,
+				GART_DISCARD_RD_ADDR_LO,
+				dev_priv->gpu_gart_start);
+	state->pcie_tx_gart_discard_rd_addr_hi =
+		REG_S(PCIE_TX_GART_DISCARD_RD_ADDR_HI,
+				GART_DISCARD_RD_ADDR_HI, 0);
+	state->pcie_tx_gart_base =
+		REG_S(PCIE_TX_GART_BASE, GART_BASE,
+				pcie->gart_table_object->offset);
+	state->pcie_tx_gart_start_lo =
+		REG_S(PCIE_TX_GART_START_LO, GART_START_LO,
+				dev_priv->gpu_gart_start);
+	state->pcie_tx_gart_start_hi =
+		REG_S(PCIE_TX_GART_START_HI, GART_START_HI, 0);
+	state->pcie_tx_gart_end_lo =
+		REG_S(PCIE_TX_GART_END_LO, GART_END_LO, dev_priv->gpu_gart_end);
+	state->pcie_tx_gart_end_hi =
+		REG_S(PCIE_TX_GART_END_HI, GART_END_HI, 0);
+	/* FIXME: why this ? */
+	state->aic_ctrl = 0;
+	state->agp_base = 0; 
+	state->agp_base_2 = 0; 
+	state->bus_cntl = MMIO_R(BUS_CNTL);
+	state->mc_agp_location = REG_S(MC_AGP_LOCATION, MC_AGP_START, 0xffc0) |
+				 REG_S(MC_AGP_LOCATION, MC_AGP_TOP, 0xffff);
+	state->pcie_tx_gart_cntl =
+		PCIE_TX_GART_CNTL__GART_EN |
+		REG_S(PCIE_TX_GART_CNTL, GART_UNMAPPED_ACCESS,
+				GART_UNMAPPED_ACCESS__DISCARD) |
+		REG_S(PCIE_TX_GART_CNTL, GART_MODE, GART_MODE__CACHE_32x128) |
+		REG_S(PCIE_TX_GART_CNTL, GART_RDREQPATH_SEL,
+				GART_RDREQPATH_SEL__HDP);
+	DRM_INFO("[radeon_ms] gpu gart start 0x%08X\n",
+		 PCIE_R(PCIE_TX_GART_START_LO));
+	DRM_INFO("[radeon_ms] gpu gart end   0x%08X\n",
+		 PCIE_R(PCIE_TX_GART_END_LO));
+	DRM_INFO("[radeon_ms] bus ready\n");
+	dev_priv->bus_ready = 1;
+	return 0;
+}
+
+void radeon_ms_pcie_restore(struct drm_device *dev, struct radeon_state *state)
+{
+	struct drm_radeon_private *dev_priv = dev->dev_private;
+
+	/* disable gart before programing other registers */
+	radeon_ms_agp_restore(dev, state);
+	PCIE_W(PCIE_TX_GART_CNTL, 0);
+	PCIE_W(PCIE_TX_GART_BASE, state->pcie_tx_gart_base);
+	PCIE_W(PCIE_TX_GART_BASE, state->pcie_tx_gart_base);
+	PCIE_W(PCIE_TX_GART_DISCARD_RD_ADDR_HI,
+	       state->pcie_tx_gart_discard_rd_addr_hi);
+	PCIE_W(PCIE_TX_GART_DISCARD_RD_ADDR_LO,
+	       state->pcie_tx_gart_discard_rd_addr_lo);
+	PCIE_W(PCIE_TX_GART_START_HI, state->pcie_tx_gart_start_hi);
+	PCIE_W(PCIE_TX_GART_START_LO, state->pcie_tx_gart_start_lo);
+	PCIE_W(PCIE_TX_GART_END_HI, state->pcie_tx_gart_end_hi);
+	PCIE_W(PCIE_TX_GART_END_LO, state->pcie_tx_gart_end_lo);
+	PCIE_W(PCIE_TX_GART_CNTL, state->pcie_tx_gart_cntl);
+}
+
+void radeon_ms_pcie_save(struct drm_device *dev, struct radeon_state *state)
+{
+	struct drm_radeon_private *dev_priv = dev->dev_private;
+
+	radeon_ms_agp_save(dev, state);
+	state->pcie_tx_gart_base = PCIE_R(PCIE_TX_GART_BASE);
+	state->pcie_tx_gart_base = PCIE_R(PCIE_TX_GART_BASE);
+	state->pcie_tx_gart_discard_rd_addr_hi =
+		PCIE_R(PCIE_TX_GART_DISCARD_RD_ADDR_HI);
+	state->pcie_tx_gart_discard_rd_addr_lo =
+		PCIE_R(PCIE_TX_GART_DISCARD_RD_ADDR_LO);
+	state->pcie_tx_gart_start_hi = PCIE_R(PCIE_TX_GART_START_HI);
+	state->pcie_tx_gart_start_lo = PCIE_R(PCIE_TX_GART_START_LO);
+	state->pcie_tx_gart_end_hi = PCIE_R(PCIE_TX_GART_END_HI);
+	state->pcie_tx_gart_end_lo = PCIE_R(PCIE_TX_GART_END_LO);
+	state->pcie_tx_gart_cntl = PCIE_R(PCIE_TX_GART_CNTL);
+}