1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Tegra host1x Channel 4 * 5 * Copyright (c) 2010-2013, NVIDIA Corporation. 6 */ 7 8 #include <linux/host1x.h> 9 #include <linux/iommu.h> 10 #include <linux/slab.h> 11 12 #include <trace/events/host1x.h> 13 14 #include "../channel.h" 15 #include "../dev.h" 16 #include "../intr.h" 17 #include "../job.h" 18 19 #define TRACE_MAX_LENGTH 128U 20 21 static void trace_write_gather(struct host1x_cdma *cdma, struct host1x_bo *bo, 22 u32 offset, u32 words) 23 { 24 struct device *dev = cdma_to_channel(cdma)->dev; 25 void *mem = NULL; 26 27 if (host1x_debug_trace_cmdbuf) 28 mem = host1x_bo_mmap(bo); 29 30 if (mem) { 31 u32 i; 32 /* 33 * Write in batches of 128 as there seems to be a limit 34 * of how much you can output to ftrace at once. 35 */ 36 for (i = 0; i < words; i += TRACE_MAX_LENGTH) { 37 u32 num_words = min(words - i, TRACE_MAX_LENGTH); 38 39 offset += i * sizeof(u32); 40 41 trace_host1x_cdma_push_gather(dev_name(dev), bo, 42 num_words, offset, 43 mem); 44 } 45 46 host1x_bo_munmap(bo, mem); 47 } 48 } 49 50 static void submit_gathers(struct host1x_job *job) 51 { 52 struct host1x_cdma *cdma = &job->channel->cdma; 53 #if HOST1X_HW < 6 54 struct device *dev = job->channel->dev; 55 #endif 56 unsigned int i; 57 58 for (i = 0; i < job->num_gathers; i++) { 59 struct host1x_job_gather *g = &job->gathers[i]; 60 dma_addr_t addr = g->base + g->offset; 61 u32 op2, op3; 62 63 op2 = lower_32_bits(addr); 64 op3 = upper_32_bits(addr); 65 66 trace_write_gather(cdma, g->bo, g->offset, g->words); 67 68 if (op3 != 0) { 69 #if HOST1X_HW >= 6 70 u32 op1 = host1x_opcode_gather_wide(g->words); 71 u32 op4 = HOST1X_OPCODE_NOP; 72 73 host1x_cdma_push_wide(cdma, op1, op2, op3, op4); 74 #else 75 dev_err(dev, "invalid gather for push buffer %pad\n", 76 &addr); 77 continue; 78 #endif 79 } else { 80 u32 op1 = host1x_opcode_gather(g->words); 81 82 host1x_cdma_push(cdma, op1, op2); 83 } 84 } 85 } 86 87 static inline void synchronize_syncpt_base(struct host1x_job *job) 88 { 89 struct host1x *host = dev_get_drvdata(job->channel->dev->parent); 90 struct host1x_syncpt *sp = host->syncpt + job->syncpt_id; 91 unsigned int id; 92 u32 value; 93 94 value = host1x_syncpt_read_max(sp); 95 id = sp->base->id; 96 97 host1x_cdma_push(&job->channel->cdma, 98 host1x_opcode_setclass(HOST1X_CLASS_HOST1X, 99 HOST1X_UCLASS_LOAD_SYNCPT_BASE, 1), 100 HOST1X_UCLASS_LOAD_SYNCPT_BASE_BASE_INDX_F(id) | 101 HOST1X_UCLASS_LOAD_SYNCPT_BASE_VALUE_F(value)); 102 } 103 104 static void host1x_channel_set_streamid(struct host1x_channel *channel) 105 { 106 #if HOST1X_HW >= 6 107 u32 sid = 0x7f; 108 #ifdef CONFIG_IOMMU_API 109 struct iommu_fwspec *spec = dev_iommu_fwspec_get(channel->dev->parent); 110 if (spec) 111 sid = spec->ids[0] & 0xffff; 112 #endif 113 114 host1x_ch_writel(channel, sid, HOST1X_CHANNEL_SMMU_STREAMID); 115 #endif 116 } 117 118 static int channel_submit(struct host1x_job *job) 119 { 120 struct host1x_channel *ch = job->channel; 121 struct host1x_syncpt *sp; 122 u32 user_syncpt_incrs = job->syncpt_incrs; 123 u32 prev_max = 0; 124 u32 syncval; 125 int err; 126 struct host1x_waitlist *completed_waiter = NULL; 127 struct host1x *host = dev_get_drvdata(ch->dev->parent); 128 129 sp = host->syncpt + job->syncpt_id; 130 trace_host1x_channel_submit(dev_name(ch->dev), 131 job->num_gathers, job->num_relocs, 132 job->syncpt_id, job->syncpt_incrs); 133 134 /* before error checks, return current max */ 135 prev_max = job->syncpt_end = host1x_syncpt_read_max(sp); 136 137 /* get submit lock */ 138 err = mutex_lock_interruptible(&ch->submitlock); 139 if (err) 140 goto error; 141 142 completed_waiter = kzalloc(sizeof(*completed_waiter), GFP_KERNEL); 143 if (!completed_waiter) { 144 mutex_unlock(&ch->submitlock); 145 err = -ENOMEM; 146 goto error; 147 } 148 149 host1x_channel_set_streamid(ch); 150 151 /* begin a CDMA submit */ 152 err = host1x_cdma_begin(&ch->cdma, job); 153 if (err) { 154 mutex_unlock(&ch->submitlock); 155 goto error; 156 } 157 158 if (job->serialize) { 159 /* 160 * Force serialization by inserting a host wait for the 161 * previous job to finish before this one can commence. 162 */ 163 host1x_cdma_push(&ch->cdma, 164 host1x_opcode_setclass(HOST1X_CLASS_HOST1X, 165 host1x_uclass_wait_syncpt_r(), 1), 166 host1x_class_host_wait_syncpt(job->syncpt_id, 167 host1x_syncpt_read_max(sp))); 168 } 169 170 /* Synchronize base register to allow using it for relative waiting */ 171 if (sp->base) 172 synchronize_syncpt_base(job); 173 174 syncval = host1x_syncpt_incr_max(sp, user_syncpt_incrs); 175 176 host1x_hw_syncpt_assign_to_channel(host, sp, ch); 177 178 job->syncpt_end = syncval; 179 180 /* add a setclass for modules that require it */ 181 if (job->class) 182 host1x_cdma_push(&ch->cdma, 183 host1x_opcode_setclass(job->class, 0, 0), 184 HOST1X_OPCODE_NOP); 185 186 submit_gathers(job); 187 188 /* end CDMA submit & stash pinned hMems into sync queue */ 189 host1x_cdma_end(&ch->cdma, job); 190 191 trace_host1x_channel_submitted(dev_name(ch->dev), prev_max, syncval); 192 193 /* schedule a submit complete interrupt */ 194 err = host1x_intr_add_action(host, sp, syncval, 195 HOST1X_INTR_ACTION_SUBMIT_COMPLETE, ch, 196 completed_waiter, NULL); 197 completed_waiter = NULL; 198 WARN(err, "Failed to set submit complete interrupt"); 199 200 mutex_unlock(&ch->submitlock); 201 202 return 0; 203 204 error: 205 kfree(completed_waiter); 206 return err; 207 } 208 209 static void enable_gather_filter(struct host1x *host, 210 struct host1x_channel *ch) 211 { 212 #if HOST1X_HW >= 6 213 u32 val; 214 215 if (!host->hv_regs) 216 return; 217 218 val = host1x_hypervisor_readl( 219 host, HOST1X_HV_CH_KERNEL_FILTER_GBUFFER(ch->id / 32)); 220 val |= BIT(ch->id % 32); 221 host1x_hypervisor_writel( 222 host, val, HOST1X_HV_CH_KERNEL_FILTER_GBUFFER(ch->id / 32)); 223 #elif HOST1X_HW >= 4 224 host1x_ch_writel(ch, 225 HOST1X_CHANNEL_CHANNELCTRL_KERNEL_FILTER_GBUFFER(1), 226 HOST1X_CHANNEL_CHANNELCTRL); 227 #endif 228 } 229 230 static int host1x_channel_init(struct host1x_channel *ch, struct host1x *dev, 231 unsigned int index) 232 { 233 #if HOST1X_HW < 6 234 ch->regs = dev->regs + index * 0x4000; 235 #else 236 ch->regs = dev->regs + index * 0x100; 237 #endif 238 enable_gather_filter(dev, ch); 239 return 0; 240 } 241 242 static const struct host1x_channel_ops host1x_channel_ops = { 243 .init = host1x_channel_init, 244 .submit = channel_submit, 245 }; 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