drm/nouveau/gr/gf100-: replace hardcoded instance/vmm setup in grctx generation

Could be useful for if/when a future GPU removes support for the GF100
PT layout.

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

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxgf100.c b/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxgf100.c
index 8c60b24..8810150 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxgf100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxgf100.c
@@ -1264,85 +1264,87 @@ gf100_grctx_generate_main(struct gf100_gr *gr, struct gf100_grctx *info)
        nvkm_mc_unk260(device, 1);
 }
 
+#define CB_RESERVED 0x80000
+
 int
 gf100_grctx_generate(struct gf100_gr *gr)
 {
        const struct gf100_grctx_func *grctx = gr->func->grctx;
        struct nvkm_subdev *subdev = &gr->base.engine.subdev;
        struct nvkm_device *device = subdev->device;
-       struct nvkm_memory *chan;
+       struct nvkm_memory *inst = NULL;
+       struct nvkm_memory *data = NULL;
+       struct nvkm_vmm *vmm = NULL;
+       struct nvkm_vma *ctx = NULL;
        struct gf100_grctx info;
        int ret, i;
        u64 addr;
 
-       /* allocate memory to for a "channel", which we'll use to generate
-        * the default context values
+       /* Allocate memory to for a "channel", which we'll use to generate
+        * the default context values.
         */
-       ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, 0x80000 + gr->size,
-                             0x1000, true, &chan);
-       if (ret) {
-               nvkm_error(subdev, "failed to allocate chan memory, %d\n", ret);
-               return ret;
-       }
+       ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST,
+                             0x1000, 0x1000, true, &inst);
+       if (ret)
+               goto done;
 
-       addr = nvkm_memory_addr(chan);
+       ret = nvkm_vmm_new(device, 0, 0, NULL, 0, NULL, "grctx", &vmm);
+       if (ret)
+               goto done;
 
-       /* PGD pointer */
-       nvkm_kmap(chan);
-       nvkm_wo32(chan, 0x0200, lower_32_bits(addr + 0x1000));
-       nvkm_wo32(chan, 0x0204, upper_32_bits(addr + 0x1000));
-       nvkm_wo32(chan, 0x0208, 0xffffffff);
-       nvkm_wo32(chan, 0x020c, 0x000000ff);
+       vmm->debug = subdev->debug;
 
-       /* PGT[0] pointer */
-       nvkm_wo32(chan, 0x1000, 0x00000000);
-       nvkm_wo32(chan, 0x1004, 0x00000001 | (addr + 0x2000) >> 8);
+       ret = nvkm_vmm_join(vmm, inst);
+       if (ret)
+               goto done;
 
-       /* identity-map the whole "channel" into its own vm */
-       for (i = 0; i < nvkm_memory_size(chan) / 4096; i++) {
-               u64 addr = ((nvkm_memory_addr(chan) + (i * 4096)) >> 8) | 1;
-               nvkm_wo32(chan, 0x2000 + (i * 8), lower_32_bits(addr));
-               nvkm_wo32(chan, 0x2004 + (i * 8), upper_32_bits(addr));
-       }
+       ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST,
+                             CB_RESERVED + gr->size, 0, true, &data);
+       if (ret)
+               goto done;
 
-       /* context pointer (virt) */
-       nvkm_wo32(chan, 0x0210, 0x00080004);
-       nvkm_wo32(chan, 0x0214, 0x00000000);
-       nvkm_done(chan);
+       ret = nvkm_vmm_get(vmm, 0, nvkm_memory_size(data), &ctx);
+       if (ret)
+               goto done;
 
-       nvkm_wr32(device, 0x100cb8, (addr + 0x1000) >> 8);
-       nvkm_wr32(device, 0x100cbc, 0x80000001);
-       nvkm_msec(device, 2000,
-               if (nvkm_rd32(device, 0x100c80) & 0x00008000)
-                       break;
-       );
+       ret = nvkm_memory_map(data, 0, vmm, ctx, NULL, 0);
+       if (ret)
+               goto done;
+
+
+       /* Setup context pointer. */
+       nvkm_kmap(inst);
+       nvkm_wo32(inst, 0x0210, lower_32_bits(ctx->addr + CB_RESERVED) | 4);
+       nvkm_wo32(inst, 0x0214, upper_32_bits(ctx->addr + CB_RESERVED));
+       nvkm_done(inst);
 
-       /* setup default state for mmio list construction */
+       /* Setup default state for mmio list construction. */
        info.gr = gr;
        info.data = gr->mmio_data;
        info.mmio = gr->mmio_list;
-       info.addr = 0x2000 + (i * 8);
+       info.addr = ctx->addr;
        info.buffer_nr = 0;
 
-       /* make channel current */
+       /* Make channel current. */
+       addr = nvkm_memory_addr(inst) >> 12;
        if (gr->firmware) {
                nvkm_wr32(device, 0x409840, 0x00000030);
-               nvkm_wr32(device, 0x409500, 0x80000000 | addr >> 12);
+               nvkm_wr32(device, 0x409500, 0x80000000 | addr);
                nvkm_wr32(device, 0x409504, 0x00000003);
                nvkm_msec(device, 2000,
                        if (nvkm_rd32(device, 0x409800) & 0x00000010)
                                break;
                );
 
-               nvkm_kmap(chan);
-               nvkm_wo32(chan, 0x8001c, 1);
-               nvkm_wo32(chan, 0x80020, 0);
-               nvkm_wo32(chan, 0x80028, 0);
-               nvkm_wo32(chan, 0x8002c, 0);
-               nvkm_done(chan);
+               nvkm_kmap(data);
+               nvkm_wo32(data, 0x1c, 1);
+               nvkm_wo32(data, 0x20, 0);
+               nvkm_wo32(data, 0x28, 0);
+               nvkm_wo32(data, 0x2c, 0);
+               nvkm_done(data);
        } else {
                nvkm_wr32(device, 0x409840, 0x80000000);
-               nvkm_wr32(device, 0x409500, 0x80000000 | addr >> 12);
+               nvkm_wr32(device, 0x409500, 0x80000000 | addr);
                nvkm_wr32(device, 0x409504, 0x00000001);
                nvkm_msec(device, 2000,
                        if (nvkm_rd32(device, 0x409800) & 0x80000000)
@@ -1352,8 +1354,8 @@ gf100_grctx_generate(struct gf100_gr *gr)
 
        grctx->main(gr, &info);
 
-       /* trigger a context unload by unsetting the "next channel valid" bit
-        * and faking a context switch interrupt
+       /* Trigger a context unload by unsetting the "next channel valid" bit
+        * and faking a context switch interrupt.
         */
        nvkm_mask(device, 0x409b04, 0x80000000, 0x00000000);
        nvkm_wr32(device, 0x409000, 0x00000100);
@@ -1367,17 +1369,21 @@ gf100_grctx_generate(struct gf100_gr *gr)
 
        gr->data = kmalloc(gr->size, GFP_KERNEL);
        if (gr->data) {
-               nvkm_kmap(chan);
+               nvkm_kmap(data);
                for (i = 0; i < gr->size; i += 4)
-                       gr->data[i / 4] = nvkm_ro32(chan, 0x80000 + i);
-               nvkm_done(chan);
+                       gr->data[i / 4] = nvkm_ro32(data, CB_RESERVED + i);
+               nvkm_done(data);
                ret = 0;
        } else {
                ret = -ENOMEM;
        }
 
 done:
-       nvkm_memory_unref(&chan);
+       nvkm_vmm_put(vmm, &ctx);
+       nvkm_memory_unref(&data);
+       nvkm_vmm_part(vmm, inst);
+       nvkm_vmm_unref(&vmm);
+       nvkm_memory_unref(&inst);
        return ret;
 }