drivers/gpu/drm/vc4/vc4_v3d.c

   1 /*
   2  * Copyright (c) 2014 The Linux Foundation. All rights reserved.
   3  * Copyright (C) 2013 Red Hat
   4  * Author: Rob Clark <robdclark@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published by
   8  * the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "linux/component.h"
  20 #include "vc4_drv.h"
  21 #include "vc4_regs.h"
  22
  23 #ifdef CONFIG_DEBUG_FS
  24 #define REGDEF(reg) { reg, #reg }
  25 static const struct {
  26         uint32_t reg;
  27         const char *name;
  28 } vc4_reg_defs[] = {
  29         REGDEF(V3D_IDENT0),
  30         REGDEF(V3D_IDENT1),
  31         REGDEF(V3D_IDENT2),
  32         REGDEF(V3D_SCRATCH),
  33         REGDEF(V3D_L2CACTL),
  34         REGDEF(V3D_SLCACTL),
  35         REGDEF(V3D_INTCTL),
  36         REGDEF(V3D_INTENA),
  37         REGDEF(V3D_INTDIS),
  38         REGDEF(V3D_CT0CS),
  39         REGDEF(V3D_CT1CS),
  40         REGDEF(V3D_CT0EA),
  41         REGDEF(V3D_CT1EA),
  42         REGDEF(V3D_CT0CA),
  43         REGDEF(V3D_CT1CA),
  44         REGDEF(V3D_CT00RA0),
  45         REGDEF(V3D_CT01RA0),
  46         REGDEF(V3D_CT0LC),
  47         REGDEF(V3D_CT1LC),
  48         REGDEF(V3D_CT0PC),
  49         REGDEF(V3D_CT1PC),
  50         REGDEF(V3D_PCS),
  51         REGDEF(V3D_BFC),
  52         REGDEF(V3D_RFC),
  53         REGDEF(V3D_BPCA),
  54         REGDEF(V3D_BPCS),
  55         REGDEF(V3D_BPOA),
  56         REGDEF(V3D_BPOS),
  57         REGDEF(V3D_BXCF),
  58         REGDEF(V3D_SQRSV0),
  59         REGDEF(V3D_SQRSV1),
  60         REGDEF(V3D_SQCNTL),
  61         REGDEF(V3D_SRQPC),
  62         REGDEF(V3D_SRQUA),
  63         REGDEF(V3D_SRQUL),
  64         REGDEF(V3D_SRQCS),
  65         REGDEF(V3D_VPACNTL),
  66         REGDEF(V3D_VPMBASE),
  67         REGDEF(V3D_PCTRC),
  68         REGDEF(V3D_PCTRE),
  69         REGDEF(V3D_PCTR0),
  70         REGDEF(V3D_PCTRS0),
  71         REGDEF(V3D_PCTR1),
  72         REGDEF(V3D_PCTRS1),
  73         REGDEF(V3D_PCTR2),
  74         REGDEF(V3D_PCTRS2),
  75         REGDEF(V3D_PCTR3),
  76         REGDEF(V3D_PCTRS3),
  77         REGDEF(V3D_PCTR4),
  78         REGDEF(V3D_PCTRS4),
  79         REGDEF(V3D_PCTR5),
  80         REGDEF(V3D_PCTRS5),
  81         REGDEF(V3D_PCTR6),
  82         REGDEF(V3D_PCTRS6),
  83         REGDEF(V3D_PCTR7),
  84         REGDEF(V3D_PCTRS7),
  85         REGDEF(V3D_PCTR8),
  86         REGDEF(V3D_PCTRS8),
  87         REGDEF(V3D_PCTR9),
  88         REGDEF(V3D_PCTRS9),
  89         REGDEF(V3D_PCTR10),
  90         REGDEF(V3D_PCTRS10),
  91         REGDEF(V3D_PCTR11),
  92         REGDEF(V3D_PCTRS11),
  93         REGDEF(V3D_PCTR12),
  94         REGDEF(V3D_PCTRS12),
  95         REGDEF(V3D_PCTR13),
  96         REGDEF(V3D_PCTRS13),
  97         REGDEF(V3D_PCTR14),
  98         REGDEF(V3D_PCTRS14),
  99         REGDEF(V3D_PCTR15),
 100         REGDEF(V3D_PCTRS15),
 101         REGDEF(V3D_DBGE),
 102         REGDEF(V3D_FDBGO),
 103         REGDEF(V3D_FDBGB),
 104         REGDEF(V3D_FDBGR),
 105         REGDEF(V3D_FDBGS),
 106         REGDEF(V3D_ERRSTAT),
 107 };
 108
 109 int vc4_v3d_debugfs_regs(struct seq_file *m, void *unused)
 110 {
 111         struct drm_info_node *node = (struct drm_info_node *)m->private;
 112         struct drm_device *dev = node->minor->dev;
 113         struct vc4_dev *vc4 = to_vc4_dev(dev);
 114         int i;
 115
 116         for (i = 0; i < ARRAY_SIZE(vc4_reg_defs); i++) {
 117                 seq_printf(m, "%s (0x%04x): 0x%08x\n",
 118                            vc4_reg_defs[i].name, vc4_reg_defs[i].reg,
 119                            V3D_READ(vc4_reg_defs[i].reg));
 120         }
 121
 122         return 0;
 123 }
 124
 125 int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused)
 126 {
 127         struct drm_info_node *node = (struct drm_info_node *)m->private;
 128         struct drm_device *dev = node->minor->dev;
 129         struct vc4_dev *vc4 = to_vc4_dev(dev);
 130         uint32_t ident1 = V3D_READ(V3D_IDENT1);
 131         uint32_t nslc = VC4_GET_FIELD(ident1, V3D_IDENT1_NSLC);
 132         uint32_t tups = VC4_GET_FIELD(ident1, V3D_IDENT1_TUPS);
 133         uint32_t qups = VC4_GET_FIELD(ident1, V3D_IDENT1_QUPS);
 134
 135         seq_printf(m, "Revision:   %d\n",
 136                    VC4_GET_FIELD(ident1, V3D_IDENT1_REV));
 137         seq_printf(m, "Slices:     %d\n", nslc);
 138         seq_printf(m, "TMUs:       %d\n", nslc * tups);
 139         seq_printf(m, "QPUs:       %d\n", nslc * qups);
 140         seq_printf(m, "Semaphores: %d\n",
 141                    VC4_GET_FIELD(ident1, V3D_IDENT1_NSEM));
 142
 143         return 0;
 144 }
 145 #endif /* CONFIG_DEBUG_FS */
 146
 147 int
 148 vc4_v3d_set_power(struct vc4_dev *vc4, bool on)
 149 {
 150         /* XXX: This interface is needed for GPU reset, and the way to
 151          * do it is to turn our power domain off and back on.  We
 152          * can't just reset from within the driver, because the reset
 153          * bits are in the power domain's register area, and get set
 154          * during the poweron process.
 155          */
 156         return 0;
 157 }
 158
 159 static void vc4_v3d_init_hw(struct drm_device *dev)
 160 {
 161         struct vc4_dev *vc4 = to_vc4_dev(dev);
 162
 163         /* Take all the memory that would have been reserved for user
 164          * QPU programs, since we don't have an interface for running
 165          * them, anyway.
 166          */
 167         V3D_WRITE(V3D_VPMBASE, 0);
 168 }
 169
 170 static int vc4_v3d_bind(struct device *dev, struct device *master, void *data)
 171 {
 172         struct platform_device *pdev = to_platform_device(dev);
 173         struct drm_device *drm = dev_get_drvdata(master);
 174         struct vc4_dev *vc4 = to_vc4_dev(drm);
 175         struct vc4_v3d *v3d = NULL;
 176         int ret;
 177
 178         v3d = devm_kzalloc(&pdev->dev, sizeof(*v3d), GFP_KERNEL);
 179         if (!v3d)
 180                 return -ENOMEM;
 181
 182         v3d->pdev = pdev;
 183
 184         v3d->regs = vc4_ioremap_regs(pdev, 0);
 185         if (IS_ERR(v3d->regs))
 186                 return PTR_ERR(v3d->regs);
 187
 188         vc4->v3d = v3d;
 189
 190         if (V3D_READ(V3D_IDENT0) != V3D_EXPECTED_IDENT0) {
 191                 DRM_ERROR("V3D_IDENT0 read 0x%08x instead of 0x%08x\n",
 192                           V3D_READ(V3D_IDENT0), V3D_EXPECTED_IDENT0);
 193                 return -EINVAL;
 194         }
 195
 196         /* Reset the binner overflow address/size at setup, to be sure
 197          * we don't reuse an old one.
 198          */
 199         V3D_WRITE(V3D_BPOA, 0);
 200         V3D_WRITE(V3D_BPOS, 0);
 201
 202         vc4_v3d_init_hw(drm);
 203
 204         ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
 205         if (ret) {
 206                 DRM_ERROR("Failed to install IRQ handler\n");
 207                 return ret;
 208         }
 209
 210         return 0;
 211 }
 212
 213 static void vc4_v3d_unbind(struct device *dev, struct device *master,
 214                            void *data)
 215 {
 216         struct drm_device *drm = dev_get_drvdata(master);
 217         struct vc4_dev *vc4 = to_vc4_dev(drm);
 218
 219         drm_irq_uninstall(drm);
 220
 221         /* Disable the binner's overflow memory address, so the next
 222          * driver probe (if any) doesn't try to reuse our old
 223          * allocation.
 224          */
 225         V3D_WRITE(V3D_BPOA, 0);
 226         V3D_WRITE(V3D_BPOS, 0);
 227
 228         vc4->v3d = NULL;
 229 }
 230
 231 static const struct component_ops vc4_v3d_ops = {
 232         .bind   = vc4_v3d_bind,
 233         .unbind = vc4_v3d_unbind,
 234 };
 235
 236 static int vc4_v3d_dev_probe(struct platform_device *pdev)
 237 {
 238         return component_add(&pdev->dev, &vc4_v3d_ops);
 239 }
 240
 241 static int vc4_v3d_dev_remove(struct platform_device *pdev)
 242 {
 243         component_del(&pdev->dev, &vc4_v3d_ops);
 244         return 0;
 245 }
 246
 247 static const struct of_device_id vc4_v3d_dt_match[] = {
 248         { .compatible = "brcm,vc4-v3d" },
 249         {}
 250 };
 251
 252 struct platform_driver vc4_v3d_driver = {
 253         .probe = vc4_v3d_dev_probe,
 254         .remove = vc4_v3d_dev_remove,
 255         .driver = {
 256                 .name = "vc4_v3d",
 257                 .of_match_table = vc4_v3d_dt_match,
 258         },
 259 };