1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) 2 // 3 // This file is provided under a dual BSD/GPLv2 license. When using or 4 // redistributing this file, you may do so under either license. 5 // 6 // Copyright(c) 2018 Intel Corporation. All rights reserved. 7 // 8 // Authors: Liam Girdwood <liam.r.girdwood@linux.intel.com> 9 // Ranjani Sridharan <ranjani.sridharan@linux.intel.com> 10 // Rander Wang <rander.wang@intel.com> 11 // Keyon Jie <yang.jie@linux.intel.com> 12 // 13 14 /* 15 * Hardware interface for generic Intel audio DSP HDA IP 16 */ 17 18 #include "../ops.h" 19 #include "hda.h" 20 21 static void hda_dsp_ipc_host_done(struct snd_sof_dev *sdev) 22 { 23 /* 24 * tell DSP cmd is done - clear busy 25 * interrupt and send reply msg to dsp 26 */ 27 snd_sof_dsp_update_bits_forced(sdev, HDA_DSP_BAR, 28 HDA_DSP_REG_HIPCT, 29 HDA_DSP_REG_HIPCT_BUSY, 30 HDA_DSP_REG_HIPCT_BUSY); 31 32 /* unmask BUSY interrupt */ 33 snd_sof_dsp_update_bits(sdev, HDA_DSP_BAR, 34 HDA_DSP_REG_HIPCCTL, 35 HDA_DSP_REG_HIPCCTL_BUSY, 36 HDA_DSP_REG_HIPCCTL_BUSY); 37 } 38 39 static void hda_dsp_ipc_dsp_done(struct snd_sof_dev *sdev) 40 { 41 /* 42 * set DONE bit - tell DSP we have received the reply msg 43 * from DSP, and processed it, don't send more reply to host 44 */ 45 snd_sof_dsp_update_bits_forced(sdev, HDA_DSP_BAR, 46 HDA_DSP_REG_HIPCIE, 47 HDA_DSP_REG_HIPCIE_DONE, 48 HDA_DSP_REG_HIPCIE_DONE); 49 50 /* unmask Done interrupt */ 51 snd_sof_dsp_update_bits(sdev, HDA_DSP_BAR, 52 HDA_DSP_REG_HIPCCTL, 53 HDA_DSP_REG_HIPCCTL_DONE, 54 HDA_DSP_REG_HIPCCTL_DONE); 55 } 56 57 int hda_dsp_ipc_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg) 58 { 59 /* send IPC message to DSP */ 60 sof_mailbox_write(sdev, sdev->host_box.offset, msg->msg_data, 61 msg->msg_size); 62 snd_sof_dsp_write(sdev, HDA_DSP_BAR, HDA_DSP_REG_HIPCI, 63 HDA_DSP_REG_HIPCI_BUSY); 64 65 return 0; 66 } 67 68 void hda_dsp_ipc_get_reply(struct snd_sof_dev *sdev) 69 { 70 struct snd_sof_ipc_msg *msg = sdev->msg; 71 struct sof_ipc_reply reply; 72 struct sof_ipc_cmd_hdr *hdr; 73 int ret = 0; 74 75 /* 76 * Sometimes, there is unexpected reply ipc arriving. The reply 77 * ipc belongs to none of the ipcs sent from driver. 78 * In this case, the driver must ignore the ipc. 79 */ 80 if (!msg) { 81 dev_warn(sdev->dev, "unexpected ipc interrupt raised!\n"); 82 return; 83 } 84 85 hdr = msg->msg_data; 86 if (hdr->cmd == (SOF_IPC_GLB_PM_MSG | SOF_IPC_PM_CTX_SAVE) || 87 hdr->cmd == (SOF_IPC_GLB_PM_MSG | SOF_IPC_PM_GATE)) { 88 /* 89 * memory windows are powered off before sending IPC reply, 90 * so we can't read the mailbox for CTX_SAVE and PM_GATE 91 * replies. 92 */ 93 reply.error = 0; 94 reply.hdr.cmd = SOF_IPC_GLB_REPLY; 95 reply.hdr.size = sizeof(reply); 96 memcpy(msg->reply_data, &reply, sizeof(reply)); 97 goto out; 98 } 99 100 /* get IPC reply from DSP in the mailbox */ 101 sof_mailbox_read(sdev, sdev->host_box.offset, &reply, 102 sizeof(reply)); 103 104 if (reply.error < 0) { 105 memcpy(msg->reply_data, &reply, sizeof(reply)); 106 ret = reply.error; 107 } else { 108 /* reply correct size ? */ 109 if (reply.hdr.size != msg->reply_size && 110 /* getter payload is never known upfront */ 111 !(reply.hdr.cmd & SOF_IPC_GLB_PROBE)) { 112 dev_err(sdev->dev, "error: reply expected %zu got %u bytes\n", 113 msg->reply_size, reply.hdr.size); 114 ret = -EINVAL; 115 } 116 117 /* read the message */ 118 if (msg->reply_size > 0) 119 sof_mailbox_read(sdev, sdev->host_box.offset, 120 msg->reply_data, msg->reply_size); 121 } 122 123 out: 124 msg->reply_error = ret; 125 126 } 127 128 /* IPC handler thread */ 129 irqreturn_t hda_dsp_ipc_irq_thread(int irq, void *context) 130 { 131 struct snd_sof_dev *sdev = context; 132 u32 hipci; 133 u32 hipcie; 134 u32 hipct; 135 u32 hipcte; 136 u32 msg; 137 u32 msg_ext; 138 bool ipc_irq = false; 139 140 /* read IPC status */ 141 hipcie = snd_sof_dsp_read(sdev, HDA_DSP_BAR, 142 HDA_DSP_REG_HIPCIE); 143 hipct = snd_sof_dsp_read(sdev, HDA_DSP_BAR, HDA_DSP_REG_HIPCT); 144 hipci = snd_sof_dsp_read(sdev, HDA_DSP_BAR, HDA_DSP_REG_HIPCI); 145 hipcte = snd_sof_dsp_read(sdev, HDA_DSP_BAR, HDA_DSP_REG_HIPCTE); 146 147 /* is this a reply message from the DSP */ 148 if (hipcie & HDA_DSP_REG_HIPCIE_DONE) { 149 msg = hipci & HDA_DSP_REG_HIPCI_MSG_MASK; 150 msg_ext = hipcie & HDA_DSP_REG_HIPCIE_MSG_MASK; 151 152 dev_vdbg(sdev->dev, 153 "ipc: firmware response, msg:0x%x, msg_ext:0x%x\n", 154 msg, msg_ext); 155 156 /* mask Done interrupt */ 157 snd_sof_dsp_update_bits(sdev, HDA_DSP_BAR, 158 HDA_DSP_REG_HIPCCTL, 159 HDA_DSP_REG_HIPCCTL_DONE, 0); 160 161 /* 162 * Make sure the interrupt thread cannot be preempted between 163 * waking up the sender and re-enabling the interrupt. Also 164 * protect against a theoretical race with sof_ipc_tx_message(): 165 * if the DSP is fast enough to receive an IPC message, reply to 166 * it, and the host interrupt processing calls this function on 167 * a different core from the one, where the sending is taking 168 * place, the message might not yet be marked as expecting a 169 * reply. 170 */ 171 spin_lock_irq(&sdev->ipc_lock); 172 173 /* handle immediate reply from DSP core */ 174 hda_dsp_ipc_get_reply(sdev); 175 snd_sof_ipc_reply(sdev, msg); 176 177 /* set the done bit */ 178 hda_dsp_ipc_dsp_done(sdev); 179 180 spin_unlock_irq(&sdev->ipc_lock); 181 182 ipc_irq = true; 183 } 184 185 /* is this a new message from DSP */ 186 if (hipct & HDA_DSP_REG_HIPCT_BUSY) { 187 msg = hipct & HDA_DSP_REG_HIPCT_MSG_MASK; 188 msg_ext = hipcte & HDA_DSP_REG_HIPCTE_MSG_MASK; 189 190 dev_vdbg(sdev->dev, 191 "ipc: firmware initiated, msg:0x%x, msg_ext:0x%x\n", 192 msg, msg_ext); 193 194 /* mask BUSY interrupt */ 195 snd_sof_dsp_update_bits(sdev, HDA_DSP_BAR, 196 HDA_DSP_REG_HIPCCTL, 197 HDA_DSP_REG_HIPCCTL_BUSY, 0); 198 199 /* handle messages from DSP */ 200 if ((hipct & SOF_IPC_PANIC_MAGIC_MASK) == SOF_IPC_PANIC_MAGIC) { 201 /* this is a PANIC message !! */ 202 snd_sof_dsp_panic(sdev, HDA_DSP_PANIC_OFFSET(msg_ext)); 203 } else { 204 /* normal message - process normally */ 205 snd_sof_ipc_msgs_rx(sdev); 206 } 207 208 hda_dsp_ipc_host_done(sdev); 209 210 ipc_irq = true; 211 } 212 213 if (!ipc_irq) { 214 /* 215 * This interrupt is not shared so no need to return IRQ_NONE. 216 */ 217 dev_dbg_ratelimited(sdev->dev, 218 "nothing to do in IPC IRQ thread\n"); 219 } 220 221 return IRQ_HANDLED; 222 } 223 224 /* Check if an IPC IRQ occurred */ 225 bool hda_dsp_check_ipc_irq(struct snd_sof_dev *sdev) 226 { 227 bool ret = false; 228 u32 irq_status; 229 230 /* store status */ 231 irq_status = snd_sof_dsp_read(sdev, HDA_DSP_BAR, HDA_DSP_REG_ADSPIS); 232 dev_vdbg(sdev->dev, "irq handler: irq_status:0x%x\n", irq_status); 233 234 /* invalid message ? */ 235 if (irq_status == 0xffffffff) 236 goto out; 237 238 /* IPC message ? */ 239 if (irq_status & HDA_DSP_ADSPIS_IPC) 240 ret = true; 241 242 out: 243 return ret; 244 } 245 246 int hda_dsp_ipc_get_mailbox_offset(struct snd_sof_dev *sdev) 247 { 248 return HDA_DSP_MBOX_UPLINK_OFFSET; 249 } 250 251 int hda_dsp_ipc_get_window_offset(struct snd_sof_dev *sdev, u32 id) 252 { 253 return SRAM_WINDOW_OFFSET(id); 254 } 255 256 void hda_ipc_msg_data(struct snd_sof_dev *sdev, 257 struct snd_pcm_substream *substream, 258 void *p, size_t sz) 259 { 260 if (!substream || !sdev->stream_box.size) { 261 sof_mailbox_read(sdev, sdev->dsp_box.offset, p, sz); 262 } else { 263 struct hdac_stream *hstream = substream->runtime->private_data; 264 struct sof_intel_hda_stream *hda_stream; 265 266 hda_stream = container_of(hstream, 267 struct sof_intel_hda_stream, 268 hda_stream.hstream); 269 270 /* The stream might already be closed */ 271 if (hstream) 272 sof_mailbox_read(sdev, hda_stream->stream.posn_offset, 273 p, sz); 274 } 275 } 276 277 int hda_ipc_pcm_params(struct snd_sof_dev *sdev, 278 struct snd_pcm_substream *substream, 279 const struct sof_ipc_pcm_params_reply *reply) 280 { 281 struct hdac_stream *hstream = substream->runtime->private_data; 282 struct sof_intel_hda_stream *hda_stream; 283 /* validate offset */ 284 size_t posn_offset = reply->posn_offset; 285 286 hda_stream = container_of(hstream, struct sof_intel_hda_stream, 287 hda_stream.hstream); 288 289 /* check for unaligned offset or overflow */ 290 if (posn_offset > sdev->stream_box.size || 291 posn_offset % sizeof(struct sof_ipc_stream_posn) != 0) 292 return -EINVAL; 293 294 hda_stream->stream.posn_offset = sdev->stream_box.offset + posn_offset; 295 296 dev_dbg(sdev->dev, "pcm: stream dir %d, posn mailbox offset is %zu", 297 substream->stream, hda_stream->stream.posn_offset); 298 299 return 0; 300 } 301