1 /* 2 * Tegra host1x Channel 3 * 4 * Copyright (c) 2010-2013, NVIDIA Corporation. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms and conditions of the GNU General Public License, 8 * version 2, as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope 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 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #include <linux/host1x.h> 20 #include <linux/slab.h> 21 22 #include <trace/events/host1x.h> 23 24 #include "../channel.h" 25 #include "../dev.h" 26 #include "../intr.h" 27 #include "../job.h" 28 29 #define TRACE_MAX_LENGTH 128U 30 31 static void trace_write_gather(struct host1x_cdma *cdma, struct host1x_bo *bo, 32 u32 offset, u32 words) 33 { 34 struct device *dev = cdma_to_channel(cdma)->dev; 35 void *mem = NULL; 36 37 if (host1x_debug_trace_cmdbuf) 38 mem = host1x_bo_mmap(bo); 39 40 if (mem) { 41 u32 i; 42 /* 43 * Write in batches of 128 as there seems to be a limit 44 * of how much you can output to ftrace at once. 45 */ 46 for (i = 0; i < words; i += TRACE_MAX_LENGTH) { 47 u32 num_words = min(words - i, TRACE_MAX_LENGTH); 48 49 offset += i * sizeof(u32); 50 51 trace_host1x_cdma_push_gather(dev_name(dev), bo, 52 num_words, offset, 53 mem); 54 } 55 56 host1x_bo_munmap(bo, mem); 57 } 58 } 59 60 static void submit_gathers(struct host1x_job *job) 61 { 62 struct host1x_cdma *cdma = &job->channel->cdma; 63 unsigned int i; 64 65 for (i = 0; i < job->num_gathers; i++) { 66 struct host1x_job_gather *g = &job->gathers[i]; 67 u32 op1 = host1x_opcode_gather(g->words); 68 u32 op2 = g->base + g->offset; 69 70 trace_write_gather(cdma, g->bo, g->offset, op1 & 0xffff); 71 host1x_cdma_push(cdma, op1, op2); 72 } 73 } 74 75 static inline void synchronize_syncpt_base(struct host1x_job *job) 76 { 77 struct host1x *host = dev_get_drvdata(job->channel->dev->parent); 78 struct host1x_syncpt *sp = host->syncpt + job->syncpt_id; 79 unsigned int id; 80 u32 value; 81 82 value = host1x_syncpt_read_max(sp); 83 id = sp->base->id; 84 85 host1x_cdma_push(&job->channel->cdma, 86 host1x_opcode_setclass(HOST1X_CLASS_HOST1X, 87 HOST1X_UCLASS_LOAD_SYNCPT_BASE, 1), 88 HOST1X_UCLASS_LOAD_SYNCPT_BASE_BASE_INDX_F(id) | 89 HOST1X_UCLASS_LOAD_SYNCPT_BASE_VALUE_F(value)); 90 } 91 92 static int channel_submit(struct host1x_job *job) 93 { 94 struct host1x_channel *ch = job->channel; 95 struct host1x_syncpt *sp; 96 u32 user_syncpt_incrs = job->syncpt_incrs; 97 u32 prev_max = 0; 98 u32 syncval; 99 int err; 100 struct host1x_waitlist *completed_waiter = NULL; 101 struct host1x *host = dev_get_drvdata(ch->dev->parent); 102 103 sp = host->syncpt + job->syncpt_id; 104 trace_host1x_channel_submit(dev_name(ch->dev), 105 job->num_gathers, job->num_relocs, 106 job->syncpt_id, job->syncpt_incrs); 107 108 /* before error checks, return current max */ 109 prev_max = job->syncpt_end = host1x_syncpt_read_max(sp); 110 111 /* get submit lock */ 112 err = mutex_lock_interruptible(&ch->submitlock); 113 if (err) 114 goto error; 115 116 completed_waiter = kzalloc(sizeof(*completed_waiter), GFP_KERNEL); 117 if (!completed_waiter) { 118 mutex_unlock(&ch->submitlock); 119 err = -ENOMEM; 120 goto error; 121 } 122 123 /* begin a CDMA submit */ 124 err = host1x_cdma_begin(&ch->cdma, job); 125 if (err) { 126 mutex_unlock(&ch->submitlock); 127 goto error; 128 } 129 130 if (job->serialize) { 131 /* 132 * Force serialization by inserting a host wait for the 133 * previous job to finish before this one can commence. 134 */ 135 host1x_cdma_push(&ch->cdma, 136 host1x_opcode_setclass(HOST1X_CLASS_HOST1X, 137 host1x_uclass_wait_syncpt_r(), 1), 138 host1x_class_host_wait_syncpt(job->syncpt_id, 139 host1x_syncpt_read_max(sp))); 140 } 141 142 /* Synchronize base register to allow using it for relative waiting */ 143 if (sp->base) 144 synchronize_syncpt_base(job); 145 146 syncval = host1x_syncpt_incr_max(sp, user_syncpt_incrs); 147 148 host1x_hw_syncpt_assign_to_channel(host, sp, ch); 149 150 job->syncpt_end = syncval; 151 152 /* add a setclass for modules that require it */ 153 if (job->class) 154 host1x_cdma_push(&ch->cdma, 155 host1x_opcode_setclass(job->class, 0, 0), 156 HOST1X_OPCODE_NOP); 157 158 submit_gathers(job); 159 160 /* end CDMA submit & stash pinned hMems into sync queue */ 161 host1x_cdma_end(&ch->cdma, job); 162 163 trace_host1x_channel_submitted(dev_name(ch->dev), prev_max, syncval); 164 165 /* schedule a submit complete interrupt */ 166 err = host1x_intr_add_action(host, sp, syncval, 167 HOST1X_INTR_ACTION_SUBMIT_COMPLETE, ch, 168 completed_waiter, NULL); 169 completed_waiter = NULL; 170 WARN(err, "Failed to set submit complete interrupt"); 171 172 mutex_unlock(&ch->submitlock); 173 174 return 0; 175 176 error: 177 kfree(completed_waiter); 178 return err; 179 } 180 181 static void enable_gather_filter(struct host1x *host, 182 struct host1x_channel *ch) 183 { 184 #if HOST1X_HW >= 6 185 u32 val; 186 187 if (!host->hv_regs) 188 return; 189 190 val = host1x_hypervisor_readl( 191 host, HOST1X_HV_CH_KERNEL_FILTER_GBUFFER(ch->id / 32)); 192 val |= BIT(ch->id % 32); 193 host1x_hypervisor_writel( 194 host, val, HOST1X_HV_CH_KERNEL_FILTER_GBUFFER(ch->id / 32)); 195 #elif HOST1X_HW >= 4 196 host1x_ch_writel(ch, 197 HOST1X_CHANNEL_CHANNELCTRL_KERNEL_FILTER_GBUFFER(1), 198 HOST1X_CHANNEL_CHANNELCTRL); 199 #endif 200 } 201 202 static int host1x_channel_init(struct host1x_channel *ch, struct host1x *dev, 203 unsigned int index) 204 { 205 #if HOST1X_HW < 6 206 ch->regs = dev->regs + index * 0x4000; 207 #else 208 ch->regs = dev->regs + index * 0x100; 209 #endif 210 enable_gather_filter(dev, ch); 211 return 0; 212 } 213 214 static const struct host1x_channel_ops host1x_channel_ops = { 215 .init = host1x_channel_init, 216 .submit = channel_submit, 217 }; 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