diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-15 13:39:18 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-15 13:39:18 -0800 |
commit | 3c18767a45650009d02537677ffb7997bd402a2c (patch) | |
tree | bfe4d355208b0e0156367d9ca4dfa4a2c6d8d17f | |
parent | 19b9aaf8a5fa634b2f16c3a2cfa819b74991273e (diff) | |
parent | 1f90a2162fb3cdfd9c44380bf16209af00f7acbe (diff) | |
download | op-kernel-dev-3c18767a45650009d02537677ffb7997bd402a2c.zip op-kernel-dev-3c18767a45650009d02537677ffb7997bd402a2c.tar.gz |
Merge tag 'mailbox-v4.15' of git://git.linaro.org/landing-teams/working/fujitsu/integration
Pull mailbox updates from Jassi Brar:
"Change to POLL api and fixes for FlexRM and OMAP driver.
Summary:
- Core: Prefer ACK method over POLL, if both supported
- Test: use flag instead of special character
- FlexRM: Usual driver internal minor churn
- Omap: fix error path"
* tag 'mailbox-v4.15' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
mailbox/omap: unregister mbox class
mailbox: mailbox-test: don't rely on rx_buffer content to signal data ready
mailbox: reset txdone_method TXDONE_BY_POLL if client knows_txdone
mailbox: Build Broadcom FlexRM driver as loadable module for iProc SOCs
mailbox: bcm-flexrm-mailbox: Use common GPL comment header
mailbox: bcm-flexrm-mailbox: add depends on ARCH_BCM_IPROC
mailbox: bcm-flexrm-mailbox: Print ring number in errors and warnings
mailbox: bcm-flexrm-mailbox: Fix FlexRM ring flush sequence
-rw-r--r-- | drivers/mailbox/Kconfig | 3 | ||||
-rw-r--r-- | drivers/mailbox/bcm-flexrm-mailbox.c | 66 | ||||
-rw-r--r-- | drivers/mailbox/mailbox-test.c | 11 | ||||
-rw-r--r-- | drivers/mailbox/mailbox.c | 4 | ||||
-rw-r--r-- | drivers/mailbox/omap-mailbox.c | 6 | ||||
-rw-r--r-- | drivers/mailbox/pcc.c | 4 |
6 files changed, 66 insertions, 28 deletions
diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index c5731e5..ba2f152 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -163,9 +163,10 @@ config BCM_PDC_MBOX config BCM_FLEXRM_MBOX tristate "Broadcom FlexRM Mailbox" depends on ARM64 + depends on ARCH_BCM_IPROC || COMPILE_TEST depends on HAS_DMA select GENERIC_MSI_IRQ_DOMAIN - default ARCH_BCM_IPROC + default m if ARCH_BCM_IPROC help Mailbox implementation of the Broadcom FlexRM ring manager, which provides access to various offload engines on Broadcom diff --git a/drivers/mailbox/bcm-flexrm-mailbox.c b/drivers/mailbox/bcm-flexrm-mailbox.c index ae61463..a8cf433 100644 --- a/drivers/mailbox/bcm-flexrm-mailbox.c +++ b/drivers/mailbox/bcm-flexrm-mailbox.c @@ -1,10 +1,18 @@ -/* Broadcom FlexRM Mailbox Driver - * +/* * Copyright (C) 2017 Broadcom * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +/* + * Broadcom FlexRM Mailbox Driver * * Each Broadcom FlexSparx4 offload engine is implemented as an * extension to Broadcom FlexRM ring manager. The FlexRM ring @@ -1116,8 +1124,8 @@ static int flexrm_process_completions(struct flexrm_ring *ring) err = flexrm_cmpl_desc_to_error(desc); if (err < 0) { dev_warn(ring->mbox->dev, - "got completion desc=0x%lx with error %d", - (unsigned long)desc, err); + "ring%d got completion desc=0x%lx with error %d\n", + ring->num, (unsigned long)desc, err); } /* Determine request id from completion descriptor */ @@ -1127,8 +1135,8 @@ static int flexrm_process_completions(struct flexrm_ring *ring) msg = ring->requests[reqid]; if (!msg) { dev_warn(ring->mbox->dev, - "null msg pointer for completion desc=0x%lx", - (unsigned long)desc); + "ring%d null msg pointer for completion desc=0x%lx\n", + ring->num, (unsigned long)desc); continue; } @@ -1238,7 +1246,9 @@ static int flexrm_startup(struct mbox_chan *chan) ring->bd_base = dma_pool_alloc(ring->mbox->bd_pool, GFP_KERNEL, &ring->bd_dma_base); if (!ring->bd_base) { - dev_err(ring->mbox->dev, "can't allocate BD memory\n"); + dev_err(ring->mbox->dev, + "can't allocate BD memory for ring%d\n", + ring->num); ret = -ENOMEM; goto fail; } @@ -1261,7 +1271,9 @@ static int flexrm_startup(struct mbox_chan *chan) ring->cmpl_base = dma_pool_alloc(ring->mbox->cmpl_pool, GFP_KERNEL, &ring->cmpl_dma_base); if (!ring->cmpl_base) { - dev_err(ring->mbox->dev, "can't allocate completion memory\n"); + dev_err(ring->mbox->dev, + "can't allocate completion memory for ring%d\n", + ring->num); ret = -ENOMEM; goto fail_free_bd_memory; } @@ -1269,7 +1281,8 @@ static int flexrm_startup(struct mbox_chan *chan) /* Request IRQ */ if (ring->irq == UINT_MAX) { - dev_err(ring->mbox->dev, "ring IRQ not available\n"); + dev_err(ring->mbox->dev, + "ring%d IRQ not available\n", ring->num); ret = -ENODEV; goto fail_free_cmpl_memory; } @@ -1278,7 +1291,8 @@ static int flexrm_startup(struct mbox_chan *chan) flexrm_irq_thread, 0, dev_name(ring->mbox->dev), ring); if (ret) { - dev_err(ring->mbox->dev, "failed to request ring IRQ\n"); + dev_err(ring->mbox->dev, + "failed to request ring%d IRQ\n", ring->num); goto fail_free_cmpl_memory; } ring->irq_requested = true; @@ -1291,7 +1305,9 @@ static int flexrm_startup(struct mbox_chan *chan) &ring->irq_aff_hint); ret = irq_set_affinity_hint(ring->irq, &ring->irq_aff_hint); if (ret) { - dev_err(ring->mbox->dev, "failed to set IRQ affinity hint\n"); + dev_err(ring->mbox->dev, + "failed to set IRQ affinity hint for ring%d\n", + ring->num); goto fail_free_irq; } @@ -1365,8 +1381,8 @@ static void flexrm_shutdown(struct mbox_chan *chan) /* Disable/inactivate ring */ writel_relaxed(0x0, ring->regs + RING_CONTROL); - /* Flush ring with timeout of 1s */ - timeout = 1000; + /* Set ring flush state */ + timeout = 1000; /* timeout of 1s */ writel_relaxed(BIT(CONTROL_FLUSH_SHIFT), ring->regs + RING_CONTROL); do { @@ -1374,7 +1390,23 @@ static void flexrm_shutdown(struct mbox_chan *chan) FLUSH_DONE_MASK) break; mdelay(1); - } while (timeout--); + } while (--timeout); + if (!timeout) + dev_err(ring->mbox->dev, + "setting ring%d flush state timedout\n", ring->num); + + /* Clear ring flush state */ + timeout = 1000; /* timeout of 1s */ + writel_relaxed(0x0, ring + RING_CONTROL); + do { + if (!(readl_relaxed(ring + RING_FLUSH_DONE) & + FLUSH_DONE_MASK)) + break; + mdelay(1); + } while (--timeout); + if (!timeout) + dev_err(ring->mbox->dev, + "clearing ring%d flush state timedout\n", ring->num); /* Abort all in-flight requests */ for (reqid = 0; reqid < RING_MAX_REQ_COUNT; reqid++) { diff --git a/drivers/mailbox/mailbox-test.c b/drivers/mailbox/mailbox-test.c index 97fb956..93f3d4d 100644 --- a/drivers/mailbox/mailbox-test.c +++ b/drivers/mailbox/mailbox-test.c @@ -30,6 +30,7 @@ #define MBOX_HEXDUMP_MAX_LEN (MBOX_HEXDUMP_LINE_LEN * \ (MBOX_MAX_MSG_LEN / MBOX_BYTES_PER_LINE)) +static bool mbox_data_ready; static struct dentry *root_debugfs_dir; struct mbox_test_device { @@ -152,16 +153,14 @@ out: static bool mbox_test_message_data_ready(struct mbox_test_device *tdev) { - unsigned char data; + bool data_ready; unsigned long flags; spin_lock_irqsave(&tdev->lock, flags); - data = tdev->rx_buffer[0]; + data_ready = mbox_data_ready; spin_unlock_irqrestore(&tdev->lock, flags); - if (data != '\0') - return true; - return false; + return data_ready; } static ssize_t mbox_test_message_read(struct file *filp, char __user *userbuf, @@ -223,6 +222,7 @@ static ssize_t mbox_test_message_read(struct file *filp, char __user *userbuf, *(touser + l) = '\0'; memset(tdev->rx_buffer, 0, MBOX_MAX_MSG_LEN); + mbox_data_ready = false; spin_unlock_irqrestore(&tdev->lock, flags); @@ -292,6 +292,7 @@ static void mbox_test_receive_message(struct mbox_client *client, void *message) message, MBOX_MAX_MSG_LEN); memcpy(tdev->rx_buffer, message, MBOX_MAX_MSG_LEN); } + mbox_data_ready = true; spin_unlock_irqrestore(&tdev->lock, flags); wake_up_interruptible(&tdev->waitq); diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c index 537f4f6..674b35f 100644 --- a/drivers/mailbox/mailbox.c +++ b/drivers/mailbox/mailbox.c @@ -351,7 +351,7 @@ struct mbox_chan *mbox_request_channel(struct mbox_client *cl, int index) init_completion(&chan->tx_complete); if (chan->txdone_method == TXDONE_BY_POLL && cl->knows_txdone) - chan->txdone_method |= TXDONE_BY_ACK; + chan->txdone_method = TXDONE_BY_ACK; spin_unlock_irqrestore(&chan->lock, flags); @@ -418,7 +418,7 @@ void mbox_free_channel(struct mbox_chan *chan) spin_lock_irqsave(&chan->lock, flags); chan->cl = NULL; chan->active_req = NULL; - if (chan->txdone_method == (TXDONE_BY_POLL | TXDONE_BY_ACK)) + if (chan->txdone_method == TXDONE_BY_ACK) chan->txdone_method = TXDONE_BY_POLL; module_put(chan->mbox->dev->driver->owner); diff --git a/drivers/mailbox/omap-mailbox.c b/drivers/mailbox/omap-mailbox.c index c5e8b9c..2517038 100644 --- a/drivers/mailbox/omap-mailbox.c +++ b/drivers/mailbox/omap-mailbox.c @@ -906,7 +906,11 @@ static int __init omap_mbox_init(void) mbox_kfifo_size = max_t(unsigned int, mbox_kfifo_size, sizeof(mbox_msg_t)); - return platform_driver_register(&omap_mbox_driver); + err = platform_driver_register(&omap_mbox_driver); + if (err) + class_unregister(&omap_mbox_class); + + return err; } subsys_initcall(omap_mbox_init); diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c index e5a6967..3ef7f03 100644 --- a/drivers/mailbox/pcc.c +++ b/drivers/mailbox/pcc.c @@ -265,7 +265,7 @@ struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl, init_completion(&chan->tx_complete); if (chan->txdone_method == TXDONE_BY_POLL && cl->knows_txdone) - chan->txdone_method |= TXDONE_BY_ACK; + chan->txdone_method = TXDONE_BY_ACK; spin_unlock_irqrestore(&chan->lock, flags); @@ -311,7 +311,7 @@ void pcc_mbox_free_channel(struct mbox_chan *chan) spin_lock_irqsave(&chan->lock, flags); chan->cl = NULL; chan->active_req = NULL; - if (chan->txdone_method == (TXDONE_BY_POLL | TXDONE_BY_ACK)) + if (chan->txdone_method == TXDONE_BY_ACK) chan->txdone_method = TXDONE_BY_POLL; spin_unlock_irqrestore(&chan->lock, flags); |