drm/nvc0: implement pfifo engine hooks

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 359 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvc0_fifo.c b/drivers/gpu/drm/nouveau/nvc0_fifo.c
index 890c2b95fbc1..82a4ded5dae8 100644
--- a/drivers/gpu/drm/nouveau/nvc0_fifo.c
+++ b/drivers/gpu/drm/nouveau/nvc0_fifo.c
@@ -25,6 +25,48 @@
 #include "drmP.h"
 
 #include "nouveau_drv.h"
+#include "nouveau_mm.h"
+
+static void nvc0_fifo_isr(struct drm_device *);
+
+struct nvc0_fifo_priv {
+        struct nouveau_gpuobj *playlist[2];
+        int cur_playlist;
+        struct nouveau_vma user_vma;
+};
+
+struct nvc0_fifo_chan {
+        struct nouveau_bo *user;
+        struct nouveau_gpuobj *ramfc;
+};
+
+static void
+nvc0_fifo_playlist_update(struct drm_device *dev)
+{
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        struct nouveau_instmem_engine *pinstmem = &dev_priv->engine.instmem;
+        struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
+        struct nvc0_fifo_priv *priv = pfifo->priv;
+        struct nouveau_gpuobj *cur;
+        int i, p;
+
+        cur = priv->playlist[priv->cur_playlist];
+        priv->cur_playlist = !priv->cur_playlist;
+
+        for (i = 0, p = 0; i < 128; i++) {
+                if (!(nv_rd32(dev, 0x3004 + (i * 8)) & 1))
+                        continue;
+                nv_wo32(cur, p + 0, i);
+                nv_wo32(cur, p + 4, 0x00000004);
+                p += 8;
+        }
+        pinstmem->flush(dev);
+
+        nv_wr32(dev, 0x002270, cur->vinst >> 12);
+        nv_wr32(dev, 0x002274, 0x01f00000 | (p >> 3));
+        if (!nv_wait(dev, 0x00227c, 0x00100000, 0x00000000))
+                NV_ERROR(dev, "PFIFO - playlist update failed\n");
+}
 
 void
 nvc0_fifo_disable(struct drm_device *dev)
@@ -57,12 +99,135 @@ nvc0_fifo_channel_id(struct drm_device *dev)
 int
 nvc0_fifo_create_context(struct nouveau_channel *chan)
 {
+        struct drm_device *dev = chan->dev;
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        struct nouveau_instmem_engine *pinstmem = &dev_priv->engine.instmem;
+        struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
+        struct nvc0_fifo_priv *priv = pfifo->priv;
+        struct nvc0_fifo_chan *fifoch;
+        u64 ib_virt, user_vinst;
+        int ret;
+
+        chan->fifo_priv = kzalloc(sizeof(*fifoch), GFP_KERNEL);
+        if (!chan->fifo_priv)
+                return -ENOMEM;
+        fifoch = chan->fifo_priv;
+
+        /* allocate vram for control regs, map into polling area */
+        ret = nouveau_bo_new(dev, NULL, 0x1000, 0, TTM_PL_FLAG_VRAM,
+                             0, 0, true, true, &fifoch->user);
+        if (ret)
+                goto error;
+
+        ret = nouveau_bo_pin(fifoch->user, TTM_PL_FLAG_VRAM);
+        if (ret) {
+                nouveau_bo_ref(NULL, &fifoch->user);
+                goto error;
+        }
+
+        user_vinst = fifoch->user->bo.mem.start << PAGE_SHIFT;
+
+        ret = nouveau_bo_map(fifoch->user);
+        if (ret) {
+                nouveau_bo_unpin(fifoch->user);
+                nouveau_bo_ref(NULL, &fifoch->user);
+                goto error;
+        }
+
+        nouveau_vm_map_at(&priv->user_vma, chan->id * 0x1000,
+                          fifoch->user->bo.mem.mm_node);
+
+        chan->user = ioremap_wc(pci_resource_start(dev->pdev, 1) +
+                                priv->user_vma.offset + (chan->id * 0x1000),
+                                PAGE_SIZE);
+        if (!chan->user) {
+                ret = -ENOMEM;
+                goto error;
+        }
+
+        ib_virt = chan->pushbuf_base + chan->dma.ib_base * 4;
+
+        /* zero channel regs */
+        nouveau_bo_wr32(fifoch->user, 0x0040/4, 0);
+        nouveau_bo_wr32(fifoch->user, 0x0044/4, 0);
+        nouveau_bo_wr32(fifoch->user, 0x0048/4, 0);
+        nouveau_bo_wr32(fifoch->user, 0x004c/4, 0);
+        nouveau_bo_wr32(fifoch->user, 0x0050/4, 0);
+        nouveau_bo_wr32(fifoch->user, 0x0058/4, 0);
+        nouveau_bo_wr32(fifoch->user, 0x005c/4, 0);
+        nouveau_bo_wr32(fifoch->user, 0x0060/4, 0);
+        nouveau_bo_wr32(fifoch->user, 0x0088/4, 0);
+        nouveau_bo_wr32(fifoch->user, 0x008c/4, 0);
+
+        /* ramfc */
+        ret = nouveau_gpuobj_new_fake(dev, chan->ramin->pinst,
+                                      chan->ramin->vinst, 0x100,
+                                      NVOBJ_FLAG_ZERO_ALLOC, &fifoch->ramfc);
+        if (ret)
+                goto error;
+
+        nv_wo32(fifoch->ramfc, 0x08, lower_32_bits(user_vinst));
+        nv_wo32(fifoch->ramfc, 0x0c, upper_32_bits(user_vinst));
+        nv_wo32(fifoch->ramfc, 0x10, 0x0000face);
+        nv_wo32(fifoch->ramfc, 0x30, 0xfffff902);
+        nv_wo32(fifoch->ramfc, 0x48, lower_32_bits(ib_virt));
+        nv_wo32(fifoch->ramfc, 0x4c, drm_order(chan->dma.ib_max + 1) << 16 |
+                                   upper_32_bits(ib_virt));
+        nv_wo32(fifoch->ramfc, 0x54, 0x00000002);
+        nv_wo32(fifoch->ramfc, 0x84, 0x20400000);
+        nv_wo32(fifoch->ramfc, 0x94, 0x30000001);
+        nv_wo32(fifoch->ramfc, 0x9c, 0x00000100);
+        nv_wo32(fifoch->ramfc, 0xa4, 0x1f1f1f1f);
+        nv_wo32(fifoch->ramfc, 0xa8, 0x1f1f1f1f);
+        nv_wo32(fifoch->ramfc, 0xac, 0x0000001f);
+        nv_wo32(fifoch->ramfc, 0xb8, 0xf8000000);
+        nv_wo32(fifoch->ramfc, 0xf8, 0x10003080); /* 0x002310 */
+        nv_wo32(fifoch->ramfc, 0xfc, 0x10000010); /* 0x002350 */
+        pinstmem->flush(dev);
+
+        nv_wr32(dev, 0x003000 + (chan->id * 8), 0xc0000000 |
+                                                (chan->ramin->vinst >> 12));
+        nv_wr32(dev, 0x003004 + (chan->id * 8), 0x001f0001);
+        nvc0_fifo_playlist_update(dev);
         return 0;
+
+error:
+        pfifo->destroy_context(chan);
+        return ret;
 }
 
 void
 nvc0_fifo_destroy_context(struct nouveau_channel *chan)
 {
+        struct drm_device *dev = chan->dev;
+        struct nvc0_fifo_chan *fifoch;
+
+        nv_mask(dev, 0x003004 + (chan->id * 8), 0x00000001, 0x00000000);
+        nv_wr32(dev, 0x002634, chan->id);
+        if (!nv_wait(dev, 0x0002634, 0xffffffff, chan->id))
+                NV_WARN(dev, "0x2634 != chid: 0x%08x\n", nv_rd32(dev, 0x2634));
+
+        nvc0_fifo_playlist_update(dev);
+
+        nv_wr32(dev, 0x003000 + (chan->id * 8), 0x00000000);
+
+        if (chan->user) {
+                iounmap(chan->user);
+                chan->user = NULL;
+        }
+
+        fifoch = chan->fifo_priv;
+        chan->fifo_priv = NULL;
+        if (!fifoch)
+                return;
+
+        nouveau_gpuobj_ref(NULL, &fifoch->ramfc);
+        if (fifoch->user) {
+                nouveau_bo_unmap(fifoch->user);
+                nouveau_bo_unpin(fifoch->user);
+                nouveau_bo_ref(NULL, &fifoch->user);
+        }
+        kfree(fifoch);
 }
 
 int
@@ -77,14 +242,208 @@ nvc0_fifo_unload_context(struct drm_device *dev)
         return 0;
 }
 
+static void
+nvc0_fifo_destroy(struct drm_device *dev)
+{
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
+        struct nvc0_fifo_priv *priv;
+
+        priv = pfifo->priv;
+        if (!priv)
+                return;
+
+        nouveau_vm_put(&priv->user_vma);
+        nouveau_gpuobj_ref(NULL, &priv->playlist[1]);
+        nouveau_gpuobj_ref(NULL, &priv->playlist[0]);
+        kfree(priv);
+}
+
 void
 nvc0_fifo_takedown(struct drm_device *dev)
 {
+        nv_wr32(dev, 0x002140, 0x00000000);
+        nvc0_fifo_destroy(dev);
+}
+
+static int
+nvc0_fifo_create(struct drm_device *dev)
+{
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
+        struct nvc0_fifo_priv *priv;
+        int ret;
+
+        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+        if (!priv)
+                return -ENOMEM;
+        pfifo->priv = priv;
+
+        ret = nouveau_gpuobj_new(dev, NULL, 0x1000, 0x1000, 0,
+                                 &priv->playlist[0]);
+        if (ret)
+                goto error;
+
+        ret = nouveau_gpuobj_new(dev, NULL, 0x1000, 0x1000, 0,
+                                 &priv->playlist[1]);
+        if (ret)
+                goto error;
+
+        ret = nouveau_vm_get(dev_priv->bar1_vm, pfifo->channels * 0x1000,
+                             12, NV_MEM_ACCESS_RW, &priv->user_vma);
+        if (ret)
+                goto error;
+
+        nouveau_irq_register(dev, 8, nvc0_fifo_isr);
+        NVOBJ_CLASS(dev, 0x506e, SW); /* nvsw */
+        return 0;
+
+error:
+        nvc0_fifo_destroy(dev);
+        return ret;
 }
 
 int
 nvc0_fifo_init(struct drm_device *dev)
 {
+        struct drm_nouveau_private *dev_priv = dev->dev_private;
+        struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
+        struct nvc0_fifo_priv *priv;
+        int ret, i;
+
+        if (!pfifo->priv) {
+                ret = nvc0_fifo_create(dev);
+                if (ret)
+                        return ret;
+        }
+        priv = pfifo->priv;
+
+        /* reset PFIFO, enable all available PSUBFIFO areas */
+        nv_mask(dev, 0x000200, 0x00000100, 0x00000000);
+        nv_mask(dev, 0x000200, 0x00000100, 0x00000100);
+        nv_wr32(dev, 0x000204, 0xffffffff);
+        nv_wr32(dev, 0x002204, 0xffffffff);
+
+        /* assign engines to subfifos */
+        nv_wr32(dev, 0x002208, ~(1 << 0)); /* PGRAPH */
+        nv_wr32(dev, 0x00220c, ~(1 << 1)); /* PVP */
+        nv_wr32(dev, 0x002210, ~(1 << 1)); /* PPP */
+        nv_wr32(dev, 0x002214, ~(1 << 1)); /* PBSP */
+        nv_wr32(dev, 0x002218, ~(1 << 2)); /* PCE0 */
+        nv_wr32(dev, 0x00221c, ~(1 << 1)); /* PCE1 */
+
+        /* PSUBFIFO[n] */
+        for (i = 0; i < 3; i++) {
+                nv_mask(dev, 0x04013c + (i * 0x2000), 0x10000100, 0x00000000);
+                nv_wr32(dev, 0x040108 + (i * 0x2000), 0xffffffff); /* INTR */
+                nv_wr32(dev, 0x04010c + (i * 0x2000), 0xfffffeff); /* INTR_EN */
+        }
+
+        nv_mask(dev, 0x002200, 0x00000001, 0x00000001);
+        nv_wr32(dev, 0x002254, 0x10000000 | priv->user_vma.offset >> 12);
+
+        nv_wr32(dev, 0x002a00, 0xffffffff); /* clears PFIFO.INTR bit 30 */
+        nv_wr32(dev, 0x002100, 0xffffffff);
+        nv_wr32(dev, 0x002140, 0xbfffffff);
         return 0;
 }
 
+struct nouveau_enum nvc0_fifo_fault_unit[] = {
+        { 0, "PGRAPH" },
+        { 3, "PEEPHOLE" },
+        { 4, "BAR1" },
+        { 5, "BAR3" },
+        { 7, "PFIFO" },
+        {}
+};
+
+struct nouveau_enum nvc0_fifo_fault_reason[] = {
+        { 0, "PT_NOT_PRESENT" },
+        { 1, "PT_TOO_SHORT" },
+        { 2, "PAGE_NOT_PRESENT" },
+        { 3, "VM_LIMIT_EXCEEDED" },
+        {}
+};
+
+struct nouveau_bitfield nvc0_fifo_subfifo_intr[] = {
+/*      { 0x00008000, "" }      seen with null ib push */
+        { 0x00200000, "ILLEGAL_MTHD" },
+        { 0x00800000, "EMPTY_SUBC" },
+        {}
+};
+
+static void
+nvc0_fifo_isr_vm_fault(struct drm_device *dev, int unit)
+{
+        u32 inst = nv_rd32(dev, 0x2800 + (unit * 0x10));
+        u32 valo = nv_rd32(dev, 0x2804 + (unit * 0x10));
+        u32 vahi = nv_rd32(dev, 0x2808 + (unit * 0x10));
+        u32 stat = nv_rd32(dev, 0x280c + (unit * 0x10));
+
+        NV_INFO(dev, "PFIFO: %s fault at 0x%010llx [",
+                (stat & 0x00000080) ? "write" : "read", (u64)vahi << 32 | valo);
+        nouveau_enum_print(nvc0_fifo_fault_reason, stat & 0x0000000f);
+        printk("] from ");
+        nouveau_enum_print(nvc0_fifo_fault_unit, unit);
+        printk(" on channel 0x%010llx\n", (u64)inst << 12);
+}
+
+static void
+nvc0_fifo_isr_subfifo_intr(struct drm_device *dev, int unit)
+{
+        u32 stat = nv_rd32(dev, 0x040108 + (unit * 0x2000));
+        u32 addr = nv_rd32(dev, 0x0400c0 + (unit * 0x2000));
+        u32 data = nv_rd32(dev, 0x0400c4 + (unit * 0x2000));
+        u32 chid = nv_rd32(dev, 0x040120 + (unit * 0x2000)) & 0x7f;
+        u32 subc = (addr & 0x00070000);
+        u32 mthd = (addr & 0x00003ffc);
+
+        NV_INFO(dev, "PSUBFIFO %d:", unit);
+        nouveau_bitfield_print(nvc0_fifo_subfifo_intr, stat);
+        NV_INFO(dev, "PSUBFIFO %d: ch %d subc %d mthd 0x%04x data 0x%08x\n",
+                unit, chid, subc, mthd, data);
+
+        nv_wr32(dev, 0x0400c0 + (unit * 0x2000), 0x80600008);
+        nv_wr32(dev, 0x040108 + (unit * 0x2000), stat);
+}
+
+static void
+nvc0_fifo_isr(struct drm_device *dev)
+{
+        u32 stat = nv_rd32(dev, 0x002100);
+
+        if (stat & 0x10000000) {
+                u32 units = nv_rd32(dev, 0x00259c);
+                u32 u = units;
+
+                while (u) {
+                        int i = ffs(u) - 1;
+                        nvc0_fifo_isr_vm_fault(dev, i);
+                        u &= ~(1 << i);
+                }
+
+                nv_wr32(dev, 0x00259c, units);
+                stat &= ~0x10000000;
+        }
+
+        if (stat & 0x20000000) {
+                u32 units = nv_rd32(dev, 0x0025a0);
+                u32 u = units;
+
+                while (u) {
+                        int i = ffs(u) - 1;
+                        nvc0_fifo_isr_subfifo_intr(dev, i);
+                        u &= ~(1 << i);
+                }
+
+                nv_wr32(dev, 0x0025a0, units);
+                stat &= ~0x20000000;
+        }
+
+        if (stat) {
+                NV_INFO(dev, "PFIFO: unhandled status 0x%08x\n", stat);
+                nv_wr32(dev, 0x002100, stat);
+        }
+
+        nv_wr32(dev, 0x2140, 0);
+}