--- /dev/null
+/*
+ * DMM IOMMU driver support functions for TI OMAP processors.
+ *
+ * Author: Rob Clark <rob@ti.com>
+ * Andy Gross <andy.gross@ti.com>
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h> /* platform_device() */
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <linux/time.h>
+#include <linux/list.h>
+#include <linux/completion.h>
+
+#include "omap_dmm_tiler.h"
+#include "omap_dmm_priv.h"
+
+#define DMM_DRIVER_NAME "dmm"
+
+/* mappings for associating views to luts */
+static struct tcm *containers[TILFMT_NFORMATS];
+static struct dmm *omap_dmm;
+
+#if defined(CONFIG_OF)
+static const struct of_device_id dmm_of_match[];
+#endif
+
+/* global spinlock for protecting lists */
+static DEFINE_SPINLOCK(list_lock);
+
+/* Geometry table */
+#define GEOM(xshift, yshift, bytes_per_pixel) { \
+ .x_shft = (xshift), \
+ .y_shft = (yshift), \
+ .cpp = (bytes_per_pixel), \
+ .slot_w = 1 << (SLOT_WIDTH_BITS - (xshift)), \
+ .slot_h = 1 << (SLOT_HEIGHT_BITS - (yshift)), \
+ }
+
+static const struct {
+ uint32_t x_shft; /* unused X-bits (as part of bpp) */
+ uint32_t y_shft; /* unused Y-bits (as part of bpp) */
+ uint32_t cpp; /* bytes/chars per pixel */
+ uint32_t slot_w; /* width of each slot (in pixels) */
+ uint32_t slot_h; /* height of each slot (in pixels) */
+} geom[TILFMT_NFORMATS] = {
+ [TILFMT_8BIT] = GEOM(0, 0, 1),
+ [TILFMT_16BIT] = GEOM(0, 1, 2),
+ [TILFMT_32BIT] = GEOM(1, 1, 4),
+ [TILFMT_PAGE] = GEOM(SLOT_WIDTH_BITS, SLOT_HEIGHT_BITS, 1),
+};
+
+
+/* lookup table for registers w/ per-engine instances */
+static const uint32_t reg[][4] = {
+ [PAT_STATUS] = {DMM_PAT_STATUS__0, DMM_PAT_STATUS__1,
+ DMM_PAT_STATUS__2, DMM_PAT_STATUS__3},
+ [PAT_DESCR] = {DMM_PAT_DESCR__0, DMM_PAT_DESCR__1,
+ DMM_PAT_DESCR__2, DMM_PAT_DESCR__3},
+};
+
+/* simple allocator to grab next 16 byte aligned memory from txn */
+static void *alloc_dma(struct dmm_txn *txn, size_t sz, dma_addr_t *pa)
+{
+ void *ptr;
+ struct refill_engine *engine = txn->engine_handle;
+
+ /* dmm programming requires 16 byte aligned addresses */
+ txn->current_pa = round_up(txn->current_pa, 16);
+ txn->current_va = (void *)round_up((long)txn->current_va, 16);
+
+ ptr = txn->current_va;
+ *pa = txn->current_pa;
+
+ txn->current_pa += sz;
+ txn->current_va += sz;
+
+ BUG_ON((txn->current_va - engine->refill_va) > REFILL_BUFFER_SIZE);
+
+ return ptr;
+}
+
+/* check status and spin until wait_mask comes true */
+static int wait_status(struct refill_engine *engine, uint32_t wait_mask)
+{
+ struct dmm *dmm = engine->dmm;
+ uint32_t r = 0, err, i;
+
+ i = DMM_FIXED_RETRY_COUNT;
+ while (true) {
+ r = readl(dmm->base + reg[PAT_STATUS][engine->id]);
+ err = r & DMM_PATSTATUS_ERR;
+ if (err)
+ return -EFAULT;
+
+ if ((r & wait_mask) == wait_mask)
+ break;
+
+ if (--i == 0)
+ return -ETIMEDOUT;
+
+ udelay(1);
+ }
+
+ return 0;
+}
+
+static void release_engine(struct refill_engine *engine)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&list_lock, flags);
+ list_add(&engine->idle_node, &omap_dmm->idle_head);
+ spin_unlock_irqrestore(&list_lock, flags);
+
+ atomic_inc(&omap_dmm->engine_counter);
+ wake_up_interruptible(&omap_dmm->engine_queue);
+}
+
+static irqreturn_t omap_dmm_irq_handler(int irq, void *arg)
+{
+ struct dmm *dmm = arg;
+ uint32_t status = readl(dmm->base + DMM_PAT_IRQSTATUS);
+ int i;
+
+ /* ack IRQ */
+ writel(status, dmm->base + DMM_PAT_IRQSTATUS);
+
+ for (i = 0; i < dmm->num_engines; i++) {
+ if (status & DMM_IRQSTAT_LST) {
+ if (dmm->engines[i].async)
+ release_engine(&dmm->engines[i]);
+
+ complete(&dmm->engines[i].compl);
+ }
+
+ status >>= 8;
+ }
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * Get a handle for a DMM transaction
+ */
+static struct dmm_txn *dmm_txn_init(struct dmm *dmm, struct tcm *tcm)
+{
+ struct dmm_txn *txn = NULL;
+ struct refill_engine *engine = NULL;
+ int ret;
+ unsigned long flags;
+
+
+ /* wait until an engine is available */
+ ret = wait_event_interruptible(omap_dmm->engine_queue,
+ atomic_add_unless(&omap_dmm->engine_counter, -1, 0));
+ if (ret)
+ return ERR_PTR(ret);
+
+ /* grab an idle engine */
+ spin_lock_irqsave(&list_lock, flags);
+ if (!list_empty(&dmm->idle_head)) {
+ engine = list_entry(dmm->idle_head.next, struct refill_engine,
+ idle_node);
+ list_del(&engine->idle_node);
+ }
+ spin_unlock_irqrestore(&list_lock, flags);
+
+ BUG_ON(!engine);
+
+ txn = &engine->txn;
+ engine->tcm = tcm;
+ txn->engine_handle = engine;
+ txn->last_pat = NULL;
+ txn->current_va = engine->refill_va;
+ txn->current_pa = engine->refill_pa;
+
+ return txn;
+}
+
+/**
+ * Add region to DMM transaction. If pages or pages[i] is NULL, then the
+ * corresponding slot is cleared (ie. dummy_pa is programmed)
+ */
+static void dmm_txn_append(struct dmm_txn *txn, struct pat_area *area,
+ struct page **pages, uint32_t npages, uint32_t roll)
+{
+ dma_addr_t pat_pa = 0, data_pa = 0;
+ uint32_t *data;
+ struct pat *pat;
+ struct refill_engine *engine = txn->engine_handle;
+ int columns = (1 + area->x1 - area->x0);
+ int rows = (1 + area->y1 - area->y0);
+ int i = columns*rows;
+
+ pat = alloc_dma(txn, sizeof(struct pat), &pat_pa);
+
+ if (txn->last_pat)
+ txn->last_pat->next_pa = (uint32_t)pat_pa;
+
+ pat->area = *area;
+
+ /* adjust Y coordinates based off of container parameters */
+ pat->area.y0 += engine->tcm->y_offset;
+ pat->area.y1 += engine->tcm->y_offset;
+
+ pat->ctrl = (struct pat_ctrl){
+ .start = 1,
+ .lut_id = engine->tcm->lut_id,
+ };
+
+ data = alloc_dma(txn, 4*i, &data_pa);
+ /* FIXME: what if data_pa is more than 32-bit ? */
+ pat->data_pa = data_pa;
+
+ while (i--) {
+ int n = i + roll;
+ if (n >= npages)
+ n -= npages;
+ data[i] = (pages && pages[n]) ?
+ page_to_phys(pages[n]) : engine->dmm->dummy_pa;
+ }
+
+ txn->last_pat = pat;
+
+ return;
+}
+
+/**
+ * Commit the DMM transaction.
+ */
+static int dmm_txn_commit(struct dmm_txn *txn, bool wait)
+{
+ int ret = 0;
+ struct refill_engine *engine = txn->engine_handle;
+ struct dmm *dmm = engine->dmm;
+
+ if (!txn->last_pat) {
+ dev_err(engine->dmm->dev, "need at least one txn\n");
+ ret = -EINVAL;
+ goto cleanup;
+ }
+
+ txn->last_pat->next_pa = 0;
+
+ /* write to PAT_DESCR to clear out any pending transaction */
+ writel(0x0, dmm->base + reg[PAT_DESCR][engine->id]);
+
+ /* wait for engine ready: */
+ ret = wait_status(engine, DMM_PATSTATUS_READY);
+ if (ret) {
+ ret = -EFAULT;
+ goto cleanup;
+ }
+
+ /* mark whether it is async to denote list management in IRQ handler */
+ engine->async = wait ? false : true;
+ reinit_completion(&engine->compl);
+ /* verify that the irq handler sees the 'async' and completion value */
+ smp_mb();
+
+ /* kick reload */
+ writel(engine->refill_pa,
+ dmm->base + reg[PAT_DESCR][engine->id]);
+
+ if (wait) {
+ if (!wait_for_completion_timeout(&engine->compl,
+ msecs_to_jiffies(1))) {
+ dev_err(dmm->dev, "timed out waiting for done\n");
+ ret = -ETIMEDOUT;
+ }
+ }
+
+cleanup:
+ /* only place engine back on list if we are done with it */
+ if (ret || wait)
+ release_engine(engine);
+
+ return ret;
+}
+
+/*
+ * DMM programming
+ */
+static int fill(struct tcm_area *area, struct page **pages,
+ uint32_t npages, uint32_t roll, bool wait)
+{
+ int ret = 0;
+ struct tcm_area slice, area_s;
+ struct dmm_txn *txn;
+
+ txn = dmm_txn_init(omap_dmm, area->tcm);
+ if (IS_ERR_OR_NULL(txn))
+ return -ENOMEM;
+
+ tcm_for_each_slice(slice, *area, area_s) {
+ struct pat_area p_area = {
+ .x0 = slice.p0.x, .y0 = slice.p0.y,
+ .x1 = slice.p1.x, .y1 = slice.p1.y,
+ };
+
+ dmm_txn_append(txn, &p_area, pages, npages, roll);
+
+ roll += tcm_sizeof(slice);
+ }
+
+ ret = dmm_txn_commit(txn, wait);
+
+ return ret;
+}
+
+/*
+ * Pin/unpin
+ */
+
+/* note: slots for which pages[i] == NULL are filled w/ dummy page
+ */
+int tiler_pin(struct tiler_block *block, struct page **pages,
+ uint32_t npages, uint32_t roll, bool wait)
+{
+ int ret;
+
+ ret = fill(&block->area, pages, npages, roll, wait);
+
+ if (ret)
+ tiler_unpin(block);
+
+ return ret;
+}
+
+int tiler_unpin(struct tiler_block *block)
+{
+ return fill(&block->area, NULL, 0, 0, false);
+}
+
+/*
+ * Reserve/release
+ */
+struct tiler_block *tiler_reserve_2d(enum tiler_fmt fmt, uint16_t w,
+ uint16_t h, uint16_t align)
+{
+ struct tiler_block *block = kzalloc(sizeof(*block), GFP_KERNEL);
+ u32 min_align = 128;
+ int ret;
+ unsigned long flags;
+
+ BUG_ON(!validfmt(fmt));
+
+ /* convert width/height to slots */
+ w = DIV_ROUND_UP(w, geom[fmt].slot_w);
+ h = DIV_ROUND_UP(h, geom[fmt].slot_h);
+
+ /* convert alignment to slots */
+ min_align = max(min_align, (geom[fmt].slot_w * geom[fmt].cpp));
+ align = ALIGN(align, min_align);
+ align /= geom[fmt].slot_w * geom[fmt].cpp;
+
+ block->fmt = fmt;
+
+ ret = tcm_reserve_2d(containers[fmt], w, h, align, &block->area);
+ if (ret) {
+ kfree(block);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ /* add to allocation list */
+ spin_lock_irqsave(&list_lock, flags);
+ list_add(&block->alloc_node, &omap_dmm->alloc_head);
+ spin_unlock_irqrestore(&list_lock, flags);
+
+ return block;
+}
+
+struct tiler_block *tiler_reserve_1d(size_t size)
+{
+ struct tiler_block *block = kzalloc(sizeof(*block), GFP_KERNEL);
+ int num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ unsigned long flags;
+
+ if (!block)
+ return ERR_PTR(-ENOMEM);
+
+ block->fmt = TILFMT_PAGE;
+
+ if (tcm_reserve_1d(containers[TILFMT_PAGE], num_pages,
+ &block->area)) {
+ kfree(block);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ spin_lock_irqsave(&list_lock, flags);
+ list_add(&block->alloc_node, &omap_dmm->alloc_head);
+ spin_unlock_irqrestore(&list_lock, flags);
+
+ return block;
+}
+
+/* note: if you have pin'd pages, you should have already unpin'd first! */
+int tiler_release(struct tiler_block *block)
+{
+ int ret = tcm_free(&block->area);
+ unsigned long flags;
+
+ if (block->area.tcm)
+ dev_err(omap_dmm->dev, "failed to release block\n");
+
+ spin_lock_irqsave(&list_lock, flags);
+ list_del(&block->alloc_node);
+ spin_unlock_irqrestore(&list_lock, flags);
+
+ kfree(block);
+ return ret;
+}
+
+/*
+ * Utils
+ */
+
+/* calculate the tiler space address of a pixel in a view orientation...
+ * below description copied from the display subsystem section of TRM:
+ *
+ * When the TILER is addressed, the bits:
+ * [28:27] = 0x0 for 8-bit tiled
+ * 0x1 for 16-bit tiled
+ * 0x2 for 32-bit tiled
+ * 0x3 for page mode
+ * [31:29] = 0x0 for 0-degree view
+ * 0x1 for 180-degree view + mirroring
+ * 0x2 for 0-degree view + mirroring
+ * 0x3 for 180-degree view
+ * 0x4 for 270-degree view + mirroring
+ * 0x5 for 270-degree view
+ * 0x6 for 90-degree view
+ * 0x7 for 90-degree view + mirroring
+ * Otherwise the bits indicated the corresponding bit address to access
+ * the SDRAM.
+ */
+static u32 tiler_get_address(enum tiler_fmt fmt, u32 orient, u32 x, u32 y)
+{
+ u32 x_bits, y_bits, tmp, x_mask, y_mask, alignment;
+
+ x_bits = CONT_WIDTH_BITS - geom[fmt].x_shft;
+ y_bits = CONT_HEIGHT_BITS - geom[fmt].y_shft;
+ alignment = geom[fmt].x_shft + geom[fmt].y_shft;
+
+ /* validate coordinate */
+ x_mask = MASK(x_bits);
+ y_mask = MASK(y_bits);
+
+ if (x < 0 || x > x_mask || y < 0 || y > y_mask) {
+ DBG("invalid coords: %u < 0 || %u > %u || %u < 0 || %u > %u",
+ x, x, x_mask, y, y, y_mask);
+ return 0;
+ }
+
+ /* account for mirroring */
+ if (orient & MASK_X_INVERT)
+ x ^= x_mask;
+ if (orient & MASK_Y_INVERT)
+ y ^= y_mask;
+
+ /* get coordinate address */
+ if (orient & MASK_XY_FLIP)
+ tmp = ((x << y_bits) + y);
+ else
+ tmp = ((y << x_bits) + x);
+
+ return TIL_ADDR((tmp << alignment), orient, fmt);
+}
+
+dma_addr_t tiler_ssptr(struct tiler_block *block)
+{
+ BUG_ON(!validfmt(block->fmt));
+
+ return TILVIEW_8BIT + tiler_get_address(block->fmt, 0,
+ block->area.p0.x * geom[block->fmt].slot_w,
+ block->area.p0.y * geom[block->fmt].slot_h);
+}
+
+dma_addr_t tiler_tsptr(struct tiler_block *block, uint32_t orient,
+ uint32_t x, uint32_t y)
+{
+ struct tcm_pt *p = &block->area.p0;
+ BUG_ON(!validfmt(block->fmt));
+
+ return tiler_get_address(block->fmt, orient,
+ (p->x * geom[block->fmt].slot_w) + x,
+ (p->y * geom[block->fmt].slot_h) + y);
+}
+
+void tiler_align(enum tiler_fmt fmt, uint16_t *w, uint16_t *h)
+{
+ BUG_ON(!validfmt(fmt));
+ *w = round_up(*w, geom[fmt].slot_w);
+ *h = round_up(*h, geom[fmt].slot_h);
+}
+
+uint32_t tiler_stride(enum tiler_fmt fmt, uint32_t orient)
+{
+ BUG_ON(!validfmt(fmt));
+
+ if (orient & MASK_XY_FLIP)
+ return 1 << (CONT_HEIGHT_BITS + geom[fmt].x_shft);
+ else
+ return 1 << (CONT_WIDTH_BITS + geom[fmt].y_shft);
+}
+
+size_t tiler_size(enum tiler_fmt fmt, uint16_t w, uint16_t h)
+{
+ tiler_align(fmt, &w, &h);
+ return geom[fmt].cpp * w * h;
+}
+
+size_t tiler_vsize(enum tiler_fmt fmt, uint16_t w, uint16_t h)
+{
+ BUG_ON(!validfmt(fmt));
+ return round_up(geom[fmt].cpp * w, PAGE_SIZE) * h;
+}
+
+uint32_t tiler_get_cpu_cache_flags(void)
+{
+ return omap_dmm->plat_data->cpu_cache_flags;
+}
+
+bool dmm_is_available(void)
+{
+ return omap_dmm ? true : false;
+}
+
+static int omap_dmm_remove(struct platform_device *dev)
+{
+ struct tiler_block *block, *_block;
+ int i;
+ unsigned long flags;
+
+ if (omap_dmm) {
+ /* free all area regions */
+ spin_lock_irqsave(&list_lock, flags);
+ list_for_each_entry_safe(block, _block, &omap_dmm->alloc_head,
+ alloc_node) {
+ list_del(&block->alloc_node);
+ kfree(block);
+ }
+ spin_unlock_irqrestore(&list_lock, flags);
+
+ for (i = 0; i < omap_dmm->num_lut; i++)
+ if (omap_dmm->tcm && omap_dmm->tcm[i])
+ omap_dmm->tcm[i]->deinit(omap_dmm->tcm[i]);
+ kfree(omap_dmm->tcm);
+
+ kfree(omap_dmm->engines);
+ if (omap_dmm->refill_va)
+ dma_free_writecombine(omap_dmm->dev,
+ REFILL_BUFFER_SIZE * omap_dmm->num_engines,
+ omap_dmm->refill_va,
+ omap_dmm->refill_pa);
+ if (omap_dmm->dummy_page)
+ __free_page(omap_dmm->dummy_page);
+
+ if (omap_dmm->irq > 0)
+ free_irq(omap_dmm->irq, omap_dmm);
+
+ iounmap(omap_dmm->base);
+ kfree(omap_dmm);
+ omap_dmm = NULL;
+ }
+
+ return 0;
+}
+
+static int omap_dmm_probe(struct platform_device *dev)
+{
+ int ret = -EFAULT, i;
+ struct tcm_area area = {0};
+ u32 hwinfo, pat_geom;
+ struct resource *mem;
+
+ omap_dmm = kzalloc(sizeof(*omap_dmm), GFP_KERNEL);
+ if (!omap_dmm)
+ goto fail;
+
+ /* initialize lists */
+ INIT_LIST_HEAD(&omap_dmm->alloc_head);
+ INIT_LIST_HEAD(&omap_dmm->idle_head);
+
+ init_waitqueue_head(&omap_dmm->engine_queue);
+
+ if (dev->dev.of_node) {
+ const struct of_device_id *match;
+
+ match = of_match_node(dmm_of_match, dev->dev.of_node);
+ if (!match) {
+ dev_err(&dev->dev, "failed to find matching device node\n");
+ return -ENODEV;
+ }
+
+ omap_dmm->plat_data = match->data;
+ }
+
+ /* lookup hwmod data - base address and irq */
+ mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!mem) {
+ dev_err(&dev->dev, "failed to get base address resource\n");
+ goto fail;
+ }
+
+ omap_dmm->base = ioremap(mem->start, SZ_2K);
+
+ if (!omap_dmm->base) {
+ dev_err(&dev->dev, "failed to get dmm base address\n");
+ goto fail;
+ }
+
+ omap_dmm->irq = platform_get_irq(dev, 0);
+ if (omap_dmm->irq < 0) {
+ dev_err(&dev->dev, "failed to get IRQ resource\n");
+ goto fail;
+ }
+
+ omap_dmm->dev = &dev->dev;
+
+ hwinfo = readl(omap_dmm->base + DMM_PAT_HWINFO);
+ omap_dmm->num_engines = (hwinfo >> 24) & 0x1F;
+ omap_dmm->num_lut = (hwinfo >> 16) & 0x1F;
+ omap_dmm->container_width = 256;
+ omap_dmm->container_height = 128;
+
+ atomic_set(&omap_dmm->engine_counter, omap_dmm->num_engines);
+
+ /* read out actual LUT width and height */
+ pat_geom = readl(omap_dmm->base + DMM_PAT_GEOMETRY);
+ omap_dmm->lut_width = ((pat_geom >> 16) & 0xF) << 5;
+ omap_dmm->lut_height = ((pat_geom >> 24) & 0xF) << 5;
+
+ /* increment LUT by one if on OMAP5 */
+ /* LUT has twice the height, and is split into a separate container */
+ if (omap_dmm->lut_height != omap_dmm->container_height)
+ omap_dmm->num_lut++;
+
+ /* initialize DMM registers */
+ writel(0x88888888, omap_dmm->base + DMM_PAT_VIEW__0);
+ writel(0x88888888, omap_dmm->base + DMM_PAT_VIEW__1);
+ writel(0x80808080, omap_dmm->base + DMM_PAT_VIEW_MAP__0);
+ writel(0x80000000, omap_dmm->base + DMM_PAT_VIEW_MAP_BASE);
+ writel(0x88888888, omap_dmm->base + DMM_TILER_OR__0);
+ writel(0x88888888, omap_dmm->base + DMM_TILER_OR__1);
+
+ ret = request_irq(omap_dmm->irq, omap_dmm_irq_handler, IRQF_SHARED,
+ "omap_dmm_irq_handler", omap_dmm);
+
+ if (ret) {
+ dev_err(&dev->dev, "couldn't register IRQ %d, error %d\n",
+ omap_dmm->irq, ret);
+ omap_dmm->irq = -1;
+ goto fail;
+ }
+
+ /* Enable all interrupts for each refill engine except
+ * ERR_LUT_MISS<n> (which is just advisory, and we don't care
+ * about because we want to be able to refill live scanout
+ * buffers for accelerated pan/scroll) and FILL_DSC<n> which
+ * we just generally don't care about.
+ */
+ writel(0x7e7e7e7e, omap_dmm->base + DMM_PAT_IRQENABLE_SET);
+
+ omap_dmm->dummy_page = alloc_page(GFP_KERNEL | __GFP_DMA32);
+ if (!omap_dmm->dummy_page) {
+ dev_err(&dev->dev, "could not allocate dummy page\n");
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ /* set dma mask for device */
+ ret = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ goto fail;
+
+ omap_dmm->dummy_pa = page_to_phys(omap_dmm->dummy_page);
+
+ /* alloc refill memory */
+ omap_dmm->refill_va = dma_alloc_writecombine(&dev->dev,
+ REFILL_BUFFER_SIZE * omap_dmm->num_engines,
+ &omap_dmm->refill_pa, GFP_KERNEL);
+ if (!omap_dmm->refill_va) {
+ dev_err(&dev->dev, "could not allocate refill memory\n");
+ goto fail;
+ }
+
+ /* alloc engines */
+ omap_dmm->engines = kcalloc(omap_dmm->num_engines,
+ sizeof(struct refill_engine), GFP_KERNEL);
+ if (!omap_dmm->engines) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ for (i = 0; i < omap_dmm->num_engines; i++) {
+ omap_dmm->engines[i].id = i;
+ omap_dmm->engines[i].dmm = omap_dmm;
+ omap_dmm->engines[i].refill_va = omap_dmm->refill_va +
+ (REFILL_BUFFER_SIZE * i);
+ omap_dmm->engines[i].refill_pa = omap_dmm->refill_pa +
+ (REFILL_BUFFER_SIZE * i);
+ init_completion(&omap_dmm->engines[i].compl);
+
+ list_add(&omap_dmm->engines[i].idle_node, &omap_dmm->idle_head);
+ }
+
+ omap_dmm->tcm = kcalloc(omap_dmm->num_lut, sizeof(*omap_dmm->tcm),
+ GFP_KERNEL);
+ if (!omap_dmm->tcm) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ /* init containers */
+ /* Each LUT is associated with a TCM (container manager). We use the
+ lut_id to denote the lut_id used to identify the correct LUT for
+ programming during reill operations */
+ for (i = 0; i < omap_dmm->num_lut; i++) {
+ omap_dmm->tcm[i] = sita_init(omap_dmm->container_width,
+ omap_dmm->container_height,
+ NULL);
+
+ if (!omap_dmm->tcm[i]) {
+ dev_err(&dev->dev, "failed to allocate container\n");
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ omap_dmm->tcm[i]->lut_id = i;
+ }
+
+ /* assign access mode containers to applicable tcm container */
+ /* OMAP 4 has 1 container for all 4 views */
+ /* OMAP 5 has 2 containers, 1 for 2D and 1 for 1D */
+ containers[TILFMT_8BIT] = omap_dmm->tcm[0];
+ containers[TILFMT_16BIT] = omap_dmm->tcm[0];
+ containers[TILFMT_32BIT] = omap_dmm->tcm[0];
+
+ if (omap_dmm->container_height != omap_dmm->lut_height) {
+ /* second LUT is used for PAGE mode. Programming must use
+ y offset that is added to all y coordinates. LUT id is still
+ 0, because it is the same LUT, just the upper 128 lines */
+ containers[TILFMT_PAGE] = omap_dmm->tcm[1];
+ omap_dmm->tcm[1]->y_offset = OMAP5_LUT_OFFSET;
+ omap_dmm->tcm[1]->lut_id = 0;
+ } else {
+ containers[TILFMT_PAGE] = omap_dmm->tcm[0];
+ }
+
+ area = (struct tcm_area) {
+ .tcm = NULL,
+ .p1.x = omap_dmm->container_width - 1,
+ .p1.y = omap_dmm->container_height - 1,
+ };
+
+ /* initialize all LUTs to dummy page entries */
+ for (i = 0; i < omap_dmm->num_lut; i++) {
+ area.tcm = omap_dmm->tcm[i];
+ if (fill(&area, NULL, 0, 0, true))
+ dev_err(omap_dmm->dev, "refill failed");
+ }
+
+ dev_info(omap_dmm->dev, "initialized all PAT entries\n");
+
+ return 0;
+
+fail:
+ if (omap_dmm_remove(dev))
+ dev_err(&dev->dev, "cleanup failed\n");
+ return ret;
+}
+
+/*
+ * debugfs support
+ */
+
+#ifdef CONFIG_DEBUG_FS
+
+static const char *alphabet = "abcdefghijklmnopqrstuvwxyz"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+static const char *special = ".,:;'\"`~!^-+";
+
+static void fill_map(char **map, int xdiv, int ydiv, struct tcm_area *a,
+ char c, bool ovw)
+{
+ int x, y;
+ for (y = a->p0.y / ydiv; y <= a->p1.y / ydiv; y++)
+ for (x = a->p0.x / xdiv; x <= a->p1.x / xdiv; x++)
+ if (map[y][x] == ' ' || ovw)
+ map[y][x] = c;
+}
+
+static void fill_map_pt(char **map, int xdiv, int ydiv, struct tcm_pt *p,
+ char c)
+{
+ map[p->y / ydiv][p->x / xdiv] = c;
+}
+
+static char read_map_pt(char **map, int xdiv, int ydiv, struct tcm_pt *p)
+{
+ return map[p->y / ydiv][p->x / xdiv];
+}
+
+static int map_width(int xdiv, int x0, int x1)
+{
+ return (x1 / xdiv) - (x0 / xdiv) + 1;
+}
+
+static void text_map(char **map, int xdiv, char *nice, int yd, int x0, int x1)
+{
+ char *p = map[yd] + (x0 / xdiv);
+ int w = (map_width(xdiv, x0, x1) - strlen(nice)) / 2;
+ if (w >= 0) {
+ p += w;
+ while (*nice)
+ *p++ = *nice++;
+ }
+}
+
+static void map_1d_info(char **map, int xdiv, int ydiv, char *nice,
+ struct tcm_area *a)
+{
+ sprintf(nice, "%dK", tcm_sizeof(*a) * 4);
+ if (a->p0.y + 1 < a->p1.y) {
+ text_map(map, xdiv, nice, (a->p0.y + a->p1.y) / 2 / ydiv, 0,
+ 256 - 1);
+ } else if (a->p0.y < a->p1.y) {
+ if (strlen(nice) < map_width(xdiv, a->p0.x, 256 - 1))
+ text_map(map, xdiv, nice, a->p0.y / ydiv,
+ a->p0.x + xdiv, 256 - 1);
+ else if (strlen(nice) < map_width(xdiv, 0, a->p1.x))
+ text_map(map, xdiv, nice, a->p1.y / ydiv,
+ 0, a->p1.y - xdiv);
+ } else if (strlen(nice) + 1 < map_width(xdiv, a->p0.x, a->p1.x)) {
+ text_map(map, xdiv, nice, a->p0.y / ydiv, a->p0.x, a->p1.x);
+ }
+}
+
+static void map_2d_info(char **map, int xdiv, int ydiv, char *nice,
+ struct tcm_area *a)
+{
+ sprintf(nice, "(%d*%d)", tcm_awidth(*a), tcm_aheight(*a));
+ if (strlen(nice) + 1 < map_width(xdiv, a->p0.x, a->p1.x))
+ text_map(map, xdiv, nice, (a->p0.y + a->p1.y) / 2 / ydiv,
+ a->p0.x, a->p1.x);
+}
+
+int tiler_map_show(struct seq_file *s, void *arg)
+{
+ int xdiv = 2, ydiv = 1;
+ char **map = NULL, *global_map;
+ struct tiler_block *block;
+ struct tcm_area a, p;
+ int i;
+ const char *m2d = alphabet;
+ const char *a2d = special;
+ const char *m2dp = m2d, *a2dp = a2d;
+ char nice[128];
+ int h_adj;
+ int w_adj;
+ unsigned long flags;
+ int lut_idx;
+
+
+ if (!omap_dmm) {
+ /* early return if dmm/tiler device is not initialized */
+ return 0;
+ }
+
+ h_adj = omap_dmm->container_height / ydiv;
+ w_adj = omap_dmm->container_width / xdiv;
+
+ map = kmalloc(h_adj * sizeof(*map), GFP_KERNEL);
+ global_map = kmalloc((w_adj + 1) * h_adj, GFP_KERNEL);
+
+ if (!map || !global_map)
+ goto error;
+
+ for (lut_idx = 0; lut_idx < omap_dmm->num_lut; lut_idx++) {
+ memset(map, 0, h_adj * sizeof(*map));
+ memset(global_map, ' ', (w_adj + 1) * h_adj);
+
+ for (i = 0; i < omap_dmm->container_height; i++) {
+ map[i] = global_map + i * (w_adj + 1);
+ map[i][w_adj] = 0;
+ }
+
+ spin_lock_irqsave(&list_lock, flags);
+
+ list_for_each_entry(block, &omap_dmm->alloc_head, alloc_node) {
+ if (block->area.tcm == omap_dmm->tcm[lut_idx]) {
+ if (block->fmt != TILFMT_PAGE) {
+ fill_map(map, xdiv, ydiv, &block->area,
+ *m2dp, true);
+ if (!*++a2dp)
+ a2dp = a2d;
+ if (!*++m2dp)
+ m2dp = m2d;
+ map_2d_info(map, xdiv, ydiv, nice,
+ &block->area);
+ } else {
+ bool start = read_map_pt(map, xdiv,
+ ydiv, &block->area.p0) == ' ';
+ bool end = read_map_pt(map, xdiv, ydiv,
+ &block->area.p1) == ' ';
+
+ tcm_for_each_slice(a, block->area, p)
+ fill_map(map, xdiv, ydiv, &a,
+ '=', true);
+ fill_map_pt(map, xdiv, ydiv,
+ &block->area.p0,
+ start ? '<' : 'X');
+ fill_map_pt(map, xdiv, ydiv,
+ &block->area.p1,
+ end ? '>' : 'X');
+ map_1d_info(map, xdiv, ydiv, nice,
+ &block->area);
+ }
+ }
+ }
+
+ spin_unlock_irqrestore(&list_lock, flags);
+
+ if (s) {
+ seq_printf(s, "CONTAINER %d DUMP BEGIN\n", lut_idx);
+ for (i = 0; i < 128; i++)
+ seq_printf(s, "%03d:%s\n", i, map[i]);
+ seq_printf(s, "CONTAINER %d DUMP END\n", lut_idx);
+ } else {
+ dev_dbg(omap_dmm->dev, "CONTAINER %d DUMP BEGIN\n",
+ lut_idx);
+ for (i = 0; i < 128; i++)
+ dev_dbg(omap_dmm->dev, "%03d:%s\n", i, map[i]);
+ dev_dbg(omap_dmm->dev, "CONTAINER %d DUMP END\n",
+ lut_idx);
+ }
+ }
+
+error:
+ kfree(map);
+ kfree(global_map);
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int omap_dmm_resume(struct device *dev)
+{
+ struct tcm_area area;
+ int i;
+
+ if (!omap_dmm)
+ return -ENODEV;
+
+ area = (struct tcm_area) {
+ .tcm = NULL,
+ .p1.x = omap_dmm->container_width - 1,
+ .p1.y = omap_dmm->container_height - 1,
+ };
+
+ /* initialize all LUTs to dummy page entries */
+ for (i = 0; i < omap_dmm->num_lut; i++) {
+ area.tcm = omap_dmm->tcm[i];
+ if (fill(&area, NULL, 0, 0, true))
+ dev_err(dev, "refill failed");
+ }
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(omap_dmm_pm_ops, NULL, omap_dmm_resume);
+
+#if defined(CONFIG_OF)
+static const struct dmm_platform_data dmm_omap4_platform_data = {
+ .cpu_cache_flags = OMAP_BO_WC,
+};
+
+static const struct dmm_platform_data dmm_omap5_platform_data = {
+ .cpu_cache_flags = OMAP_BO_UNCACHED,
+};
+
+static const struct of_device_id dmm_of_match[] = {
+ {
+ .compatible = "ti,omap4-dmm",
+ .data = &dmm_omap4_platform_data,
+ },
+ {
+ .compatible = "ti,omap5-dmm",
+ .data = &dmm_omap5_platform_data,
+ },
+ {},
+};
+#endif
+
+struct platform_driver omap_dmm_driver = {
+ .probe = omap_dmm_probe,
+ .remove = omap_dmm_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DMM_DRIVER_NAME,
+ .of_match_table = of_match_ptr(dmm_of_match),
+ .pm = &omap_dmm_pm_ops,
+ },
+};
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Andy Gross <andy.gross@ti.com>");
+MODULE_DESCRIPTION("OMAP DMM/Tiler Driver");
+MODULE_ALIAS("platform:" DMM_DRIVER_NAME);
Code Review / kvmfornfv.git / blobdiff