diff options
Diffstat (limited to 'drivers/gpu/host1x/hw/cdma_hw.c')
| -rw-r--r-- | drivers/gpu/host1x/hw/cdma_hw.c | 185 |
1 files changed, 118 insertions, 67 deletions
diff --git a/drivers/gpu/host1x/hw/cdma_hw.c b/drivers/gpu/host1x/hw/cdma_hw.c index 2ee4ad55c4db..3f3f0018eee0 100644 --- a/drivers/gpu/host1x/hw/cdma_hw.c +++ b/drivers/gpu/host1x/hw/cdma_hw.c @@ -1,36 +1,25 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Tegra host1x Command DMA * * Copyright (c) 2010-2013, NVIDIA Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/slab.h> #include <linux/scatterlist.h> #include <linux/dma-mapping.h> -#include "cdma.h" -#include "channel.h" -#include "dev.h" -#include "debug.h" +#include "../cdma.h" +#include "../channel.h" +#include "../dev.h" +#include "../debug.h" /* - * Put the restart at the end of pushbuffer memor + * Put the restart at the end of pushbuffer memory */ static void push_buffer_init(struct push_buffer *pb) { - *(pb->mapped + (pb->size_bytes >> 2)) = host1x_opcode_restart(0); + *(u32 *)(pb->mapped + pb->size) = host1x_opcode_restart(0); } /* @@ -39,26 +28,13 @@ static void push_buffer_init(struct push_buffer *pb) static void cdma_timeout_cpu_incr(struct host1x_cdma *cdma, u32 getptr, u32 syncpt_incrs, u32 syncval, u32 nr_slots) { - struct host1x *host1x = cdma_to_host1x(cdma); - struct push_buffer *pb = &cdma->push_buffer; - u32 i; + unsigned int i; for (i = 0; i < syncpt_incrs; i++) host1x_syncpt_incr(cdma->timeout.syncpt); /* after CPU incr, ensure shadow is up to date */ host1x_syncpt_load(cdma->timeout.syncpt); - - /* NOP all the PB slots */ - while (nr_slots--) { - u32 *p = (u32 *)((u32)pb->mapped + getptr); - *(p++) = HOST1X_OPCODE_NOP; - *(p++) = HOST1X_OPCODE_NOP; - dev_dbg(host1x->dev, "%s: NOP at 0x%x\n", __func__, - pb->phys + getptr); - getptr = (getptr + 8) & (pb->size_bytes - 1); - } - wmb(); } /* @@ -67,21 +43,31 @@ static void cdma_timeout_cpu_incr(struct host1x_cdma *cdma, u32 getptr, static void cdma_start(struct host1x_cdma *cdma) { struct host1x_channel *ch = cdma_to_channel(cdma); + u64 start, end; if (cdma->running) return; cdma->last_pos = cdma->push_buffer.pos; + start = cdma->push_buffer.dma; + end = cdma->push_buffer.size + 4; host1x_ch_writel(ch, HOST1X_CHANNEL_DMACTRL_DMASTOP, HOST1X_CHANNEL_DMACTRL); /* set base, put and end pointer */ - host1x_ch_writel(ch, cdma->push_buffer.phys, HOST1X_CHANNEL_DMASTART); + host1x_ch_writel(ch, lower_32_bits(start), HOST1X_CHANNEL_DMASTART); +#if HOST1X_HW >= 6 + host1x_ch_writel(ch, upper_32_bits(start), HOST1X_CHANNEL_DMASTART_HI); +#endif host1x_ch_writel(ch, cdma->push_buffer.pos, HOST1X_CHANNEL_DMAPUT); - host1x_ch_writel(ch, cdma->push_buffer.phys + - cdma->push_buffer.size_bytes + 4, - HOST1X_CHANNEL_DMAEND); +#if HOST1X_HW >= 6 + host1x_ch_writel(ch, 0, HOST1X_CHANNEL_DMAPUT_HI); +#endif + host1x_ch_writel(ch, lower_32_bits(end), HOST1X_CHANNEL_DMAEND); +#if HOST1X_HW >= 6 + host1x_ch_writel(ch, upper_32_bits(end), HOST1X_CHANNEL_DMAEND_HI); +#endif /* reset GET */ host1x_ch_writel(ch, HOST1X_CHANNEL_DMACTRL_DMASTOP | @@ -104,6 +90,7 @@ static void cdma_timeout_restart(struct host1x_cdma *cdma, u32 getptr) { struct host1x *host1x = cdma_to_host1x(cdma); struct host1x_channel *ch = cdma_to_channel(cdma); + u64 start, end; if (cdma->running) return; @@ -113,11 +100,18 @@ static void cdma_timeout_restart(struct host1x_cdma *cdma, u32 getptr) host1x_ch_writel(ch, HOST1X_CHANNEL_DMACTRL_DMASTOP, HOST1X_CHANNEL_DMACTRL); + start = cdma->push_buffer.dma; + end = cdma->push_buffer.size + 4; + /* set base, end pointer (all of memory) */ - host1x_ch_writel(ch, cdma->push_buffer.phys, HOST1X_CHANNEL_DMASTART); - host1x_ch_writel(ch, cdma->push_buffer.phys + - cdma->push_buffer.size_bytes, - HOST1X_CHANNEL_DMAEND); + host1x_ch_writel(ch, lower_32_bits(start), HOST1X_CHANNEL_DMASTART); +#if HOST1X_HW >= 6 + host1x_ch_writel(ch, upper_32_bits(start), HOST1X_CHANNEL_DMASTART_HI); +#endif + host1x_ch_writel(ch, lower_32_bits(end), HOST1X_CHANNEL_DMAEND); +#if HOST1X_HW >= 6 + host1x_ch_writel(ch, upper_32_bits(end), HOST1X_CHANNEL_DMAEND_HI); +#endif /* set GET, by loading the value in PUT (then reset GET) */ host1x_ch_writel(ch, getptr, HOST1X_CHANNEL_DMAPUT); @@ -162,15 +156,41 @@ static void cdma_stop(struct host1x_cdma *cdma) struct host1x_channel *ch = cdma_to_channel(cdma); mutex_lock(&cdma->lock); + if (cdma->running) { host1x_cdma_wait_locked(cdma, CDMA_EVENT_SYNC_QUEUE_EMPTY); host1x_ch_writel(ch, HOST1X_CHANNEL_DMACTRL_DMASTOP, HOST1X_CHANNEL_DMACTRL); cdma->running = false; } + mutex_unlock(&cdma->lock); } +static void cdma_hw_cmdproc_stop(struct host1x *host, struct host1x_channel *ch, + bool stop) +{ +#if HOST1X_HW >= 6 + host1x_ch_writel(ch, stop ? 0x1 : 0x0, HOST1X_CHANNEL_CMDPROC_STOP); +#else + u32 cmdproc_stop = host1x_sync_readl(host, HOST1X_SYNC_CMDPROC_STOP); + if (stop) + cmdproc_stop |= BIT(ch->id); + else + cmdproc_stop &= ~BIT(ch->id); + host1x_sync_writel(host, cmdproc_stop, HOST1X_SYNC_CMDPROC_STOP); +#endif +} + +static void cdma_hw_teardown(struct host1x *host, struct host1x_channel *ch) +{ +#if HOST1X_HW >= 6 + host1x_ch_writel(ch, 0x1, HOST1X_CHANNEL_TEARDOWN); +#else + host1x_sync_writel(host, BIT(ch->id), HOST1X_SYNC_CH_TEARDOWN); +#endif +} + /* * Stops both channel's command processor and CDMA immediately. * Also, tears down the channel and resets corresponding module. @@ -179,7 +199,6 @@ static void cdma_freeze(struct host1x_cdma *cdma) { struct host1x *host = cdma_to_host1x(cdma); struct host1x_channel *ch = cdma_to_channel(cdma); - u32 cmdproc_stop; if (cdma->torndown && !cdma->running) { dev_warn(host->dev, "Already torn down\n"); @@ -188,9 +207,7 @@ static void cdma_freeze(struct host1x_cdma *cdma) dev_dbg(host->dev, "freezing channel (id %d)\n", ch->id); - cmdproc_stop = host1x_sync_readl(host, HOST1X_SYNC_CMDPROC_STOP); - cmdproc_stop |= BIT(ch->id); - host1x_sync_writel(host, cmdproc_stop, HOST1X_SYNC_CMDPROC_STOP); + cdma_hw_cmdproc_stop(host, ch, true); dev_dbg(host->dev, "%s: DMA GET 0x%x, PUT HW 0x%x / shadow 0x%x\n", __func__, host1x_ch_readl(ch, HOST1X_CHANNEL_DMAGET), @@ -200,7 +217,7 @@ static void cdma_freeze(struct host1x_cdma *cdma) host1x_ch_writel(ch, HOST1X_CHANNEL_DMACTRL_DMASTOP, HOST1X_CHANNEL_DMACTRL); - host1x_sync_writel(host, BIT(ch->id), HOST1X_SYNC_CH_TEARDOWN); + cdma_hw_teardown(host, ch); cdma->running = false; cdma->torndown = true; @@ -210,20 +227,60 @@ static void cdma_resume(struct host1x_cdma *cdma, u32 getptr) { struct host1x *host1x = cdma_to_host1x(cdma); struct host1x_channel *ch = cdma_to_channel(cdma); - u32 cmdproc_stop; dev_dbg(host1x->dev, - "resuming channel (id %d, DMAGET restart = 0x%x)\n", + "resuming channel (id %u, DMAGET restart = 0x%x)\n", ch->id, getptr); - cmdproc_stop = host1x_sync_readl(host1x, HOST1X_SYNC_CMDPROC_STOP); - cmdproc_stop &= ~(BIT(ch->id)); - host1x_sync_writel(host1x, cmdproc_stop, HOST1X_SYNC_CMDPROC_STOP); + cdma_hw_cmdproc_stop(host1x, ch, false); cdma->torndown = false; cdma_timeout_restart(cdma, getptr); } +static void timeout_release_mlock(struct host1x_cdma *cdma) +{ +#if HOST1X_HW >= 8 + /* Tegra186 and Tegra194 require a more complicated MLOCK release + * sequence. Furthermore, those chips by default don't enforce MLOCKs, + * so it turns out that if we don't /actually/ need MLOCKs, we can just + * ignore them. + * + * As such, for now just implement this on Tegra234 where things are + * stricter but also easy to implement. + */ + struct host1x_channel *ch = cdma_to_channel(cdma); + struct host1x *host1x = cdma_to_host1x(cdma); + u32 offset; + + switch (ch->client->class) { + case HOST1X_CLASS_NVJPG1: + offset = HOST1X_COMMON_NVJPG1_MLOCK; + break; + case HOST1X_CLASS_NVENC: + offset = HOST1X_COMMON_NVENC_MLOCK; + break; + case HOST1X_CLASS_VIC: + offset = HOST1X_COMMON_VIC_MLOCK; + break; + case HOST1X_CLASS_NVJPG: + offset = HOST1X_COMMON_NVJPG_MLOCK; + break; + case HOST1X_CLASS_NVDEC: + offset = HOST1X_COMMON_NVDEC_MLOCK; + break; + case HOST1X_CLASS_OFA: + offset = HOST1X_COMMON_OFA_MLOCK; + break; + default: + WARN(1, "%s was not updated for class %u", __func__, ch->client->class); + return; + } + + host1x_common_writel(host1x, 0x0, offset); +#endif +} + /* * If this timeout fires, it indicates the current sync_queue entry has * exceeded its TTL and the userctx should be timed out and remaining @@ -231,14 +288,11 @@ static void cdma_resume(struct host1x_cdma *cdma, u32 getptr) */ static void cdma_timeout_handler(struct work_struct *work) { + u32 syncpt_val; struct host1x_cdma *cdma; struct host1x *host1x; struct host1x_channel *ch; - u32 syncpt_val; - - u32 prev_cmdproc, cmdproc_stop; - cdma = container_of(to_delayed_work(work), struct host1x_cdma, timeout.wq); host1x = cdma_to_host1x(cdma); @@ -256,12 +310,7 @@ static void cdma_timeout_handler(struct work_struct *work) } /* stop processing to get a clean snapshot */ - prev_cmdproc = host1x_sync_readl(host1x, HOST1X_SYNC_CMDPROC_STOP); - cmdproc_stop = prev_cmdproc | BIT(ch->id); - host1x_sync_writel(host1x, cmdproc_stop, HOST1X_SYNC_CMDPROC_STOP); - - dev_dbg(host1x->dev, "cdma_timeout: cmdproc was 0x%x is 0x%x\n", - prev_cmdproc, cmdproc_stop); + cdma_hw_cmdproc_stop(host1x, ch, true); syncpt_val = host1x_syncpt_load(cdma->timeout.syncpt); @@ -270,20 +319,21 @@ static void cdma_timeout_handler(struct work_struct *work) dev_dbg(host1x->dev, "cdma_timeout: expired, but buffer had completed\n"); /* restore */ - cmdproc_stop = prev_cmdproc & ~(BIT(ch->id)); - host1x_sync_writel(host1x, cmdproc_stop, - HOST1X_SYNC_CMDPROC_STOP); + cdma_hw_cmdproc_stop(host1x, ch, false); mutex_unlock(&cdma->lock); return; } - dev_warn(host1x->dev, "%s: timeout: %d (%s), HW thresh %d, done %d\n", - __func__, cdma->timeout.syncpt->id, cdma->timeout.syncpt->name, - syncpt_val, cdma->timeout.syncpt_val); + dev_warn(host1x->dev, "%s: timeout: %u (%s), HW thresh %d, done %d\n", + __func__, cdma->timeout.syncpt->id, cdma->timeout.syncpt->name, + syncpt_val, cdma->timeout.syncpt_val); /* stop HW, resetting channel/module */ host1x_hw_cdma_freeze(host1x, cdma); + /* release any held MLOCK */ + timeout_release_mlock(cdma); + host1x_cdma_update_sync_queue(cdma, ch->dev); mutex_unlock(&cdma->lock); } @@ -291,7 +341,7 @@ static void cdma_timeout_handler(struct work_struct *work) /* * Init timeout resources */ -static int cdma_timeout_init(struct host1x_cdma *cdma, u32 syncpt_id) +static int cdma_timeout_init(struct host1x_cdma *cdma) { INIT_DELAYED_WORK(&cdma->timeout.wq, cdma_timeout_handler); cdma->timeout.initialized = true; @@ -306,6 +356,7 @@ static void cdma_timeout_destroy(struct host1x_cdma *cdma) { if (cdma->timeout.initialized) cancel_delayed_work(&cdma->timeout.wq); + cdma->timeout.initialized = false; } |