[15/17] cx23885: Protect PCI interrupt mask manipulations with a spinlock

Message ID	1279589111.31145.13.camel@localhost (mailing list archive)
State	RFC
Headers	show Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o6K1Od1Q028073 for <patchwork-media@patchwork.kernel.org>; Tue, 20 Jul 2010 01:24:39 GMT Subject: [PATCH 15/17] cx23885: Protect PCI interrupt mask manipulations with a spinlock From: Andy Walls <awalls@md.metrocast.net> To: linux-media@vger.kernel.org Cc: Kenney Phillisjr <kphillisjr@gmail.com>, Steven Toth <stoth@kernellabs.com>, "Igor M.Liplianin" <liplianin@me.by> In-Reply-To: <cover.1279586511.git.awalls@md.metrocast.net> References: <cover.1279586511.git.awalls@md.metrocast.net> Content-Type: text/plain; charset="UTF-8" Date: Mon, 19 Jul 2010 21:25:11 -0400 Message-ID: <1279589111.31145.13.camel@localhost> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org Precedence: bulk

diff --git a/drivers/media/video/cx23885/cx23885-cards.c b/drivers/media/video/cx23885/cx23885-cards.c index 5c11caf..b8ad935 100644 --- a/drivers/media/video/cx23885/cx23885-cards.c +++ b/drivers/media/video/cx23885/cx23885-cards.c @@ -972,7 +972,6 @@ int cx23885_ir_init(struct cx23885_dev *dev) dev->sd_ir = cx23885_find_hw(dev, CX23885_HW_888_IR); v4l2_subdev_call(dev->sd_cx25840, core, s_io_pin_config, ir_rxtx_pin_cfg_count, ir_rxtx_pin_cfg); - dev->pci_irqmask |= PCI_MSK_IR; /* * For these boards we need to invert the Tx output via the * IR controller to have the LED off while idle @@ -993,7 +992,6 @@ int cx23885_ir_init(struct cx23885_dev *dev) } v4l2_subdev_call(dev->sd_cx25840, core, s_io_pin_config, ir_rx_pin_cfg_count, ir_rx_pin_cfg); - dev->pci_irqmask |= PCI_MSK_AV_CORE; break; case CX23885_BOARD_HAUPPAUGE_HVR1250: dev->sd_ir = cx23885_find_hw(dev, CX23885_HW_AV_CORE); @@ -1003,7 +1001,6 @@ int cx23885_ir_init(struct cx23885_dev *dev) } v4l2_subdev_call(dev->sd_cx25840, core, s_io_pin_config, ir_rxtx_pin_cfg_count, ir_rxtx_pin_cfg); - dev->pci_irqmask |= PCI_MSK_AV_CORE; break; case CX23885_BOARD_DVICO_FUSIONHDTV_DVB_T_DUAL_EXP: request_module("ir-kbd-i2c"); @@ -1018,15 +1015,13 @@ void cx23885_ir_fini(struct cx23885_dev *dev) switch (dev->board) { case CX23885_BOARD_HAUPPAUGE_HVR1850: case CX23885_BOARD_HAUPPAUGE_HVR1290: - dev->pci_irqmask &= ~PCI_MSK_IR; - cx_clear(PCI_INT_MSK, PCI_MSK_IR); + cx23885_irq_remove(dev, PCI_MSK_IR); cx23888_ir_remove(dev); dev->sd_ir = NULL; break; case CX23885_BOARD_TEVII_S470: case CX23885_BOARD_HAUPPAUGE_HVR1250: - dev->pci_irqmask &= ~PCI_MSK_AV_CORE; - cx_clear(PCI_INT_MSK, PCI_MSK_AV_CORE); + cx23885_irq_remove(dev, PCI_MSK_AV_CORE); /* sd_ir is a duplicate pointer to the AV Core, just clear it */ dev->sd_ir = NULL; break; @@ -1038,13 +1033,13 @@ void cx23885_ir_pci_int_enable(struct cx23885_dev *dev) switch (dev->board) { case CX23885_BOARD_HAUPPAUGE_HVR1850: case CX23885_BOARD_HAUPPAUGE_HVR1290: - if (dev->sd_ir && (dev->pci_irqmask & PCI_MSK_IR)) - cx_set(PCI_INT_MSK, PCI_MSK_IR); + if (dev->sd_ir) + cx23885_irq_add_enable(dev, PCI_MSK_IR); break; case CX23885_BOARD_TEVII_S470: case CX23885_BOARD_HAUPPAUGE_HVR1250: - if (dev->sd_ir && (dev->pci_irqmask & PCI_MSK_AV_CORE)) - cx_set(PCI_INT_MSK, PCI_MSK_AV_CORE); + if (dev->sd_ir) + cx23885_irq_add_enable(dev, PCI_MSK_AV_CORE); break; } } diff --git a/drivers/media/video/cx23885/cx23885-core.c b/drivers/media/video/cx23885/cx23885-core.c index f912be2..fa2f4b1 100644 --- a/drivers/media/video/cx23885/cx23885-core.c +++ b/drivers/media/video/cx23885/cx23885-core.c @@ -299,6 +299,83 @@ static struct sram_channel cx23887_sram_channels[] = { }, }; +void cx23885_irq_add(struct cx23885_dev *dev, u32 mask) +{ + unsigned long flags; + spin_lock_irqsave(&dev->pci_irqmask_lock, flags); + + dev->pci_irqmask |= mask; + + spin_unlock_irqrestore(&dev->pci_irqmask_lock, flags); +} + +void cx23885_irq_add_enable(struct cx23885_dev *dev, u32 mask) +{ + unsigned long flags; + spin_lock_irqsave(&dev->pci_irqmask_lock, flags); + + dev->pci_irqmask |= mask; + cx_set(PCI_INT_MSK, mask); + + spin_unlock_irqrestore(&dev->pci_irqmask_lock, flags); +} + +void cx23885_irq_enable(struct cx23885_dev *dev, u32 mask) +{ + u32 v; + unsigned long flags; + spin_lock_irqsave(&dev->pci_irqmask_lock, flags); + + v = mask & dev->pci_irqmask; + if (v) + cx_set(PCI_INT_MSK, v); + + spin_unlock_irqrestore(&dev->pci_irqmask_lock, flags); +} + +static inline void cx23885_irq_enable_all(struct cx23885_dev *dev) +{ + cx23885_irq_enable(dev, 0xffffffff); +} + +void cx23885_irq_disable(struct cx23885_dev *dev, u32 mask) +{ + unsigned long flags; + spin_lock_irqsave(&dev->pci_irqmask_lock, flags); + + cx_clear(PCI_INT_MSK, mask); + + spin_unlock_irqrestore(&dev->pci_irqmask_lock, flags); +} + +static inline void cx23885_irq_disable_all(struct cx23885_dev *dev) +{ + cx23885_irq_disable(dev, 0xffffffff); +} + +void cx23885_irq_remove(struct cx23885_dev *dev, u32 mask) +{ + unsigned long flags; + spin_lock_irqsave(&dev->pci_irqmask_lock, flags); + + dev->pci_irqmask &= ~mask; + cx_clear(PCI_INT_MSK, mask); + + spin_unlock_irqrestore(&dev->pci_irqmask_lock, flags); +} + +static u32 cx23885_irq_get_mask(struct cx23885_dev *dev) +{ + u32 v; + unsigned long flags; + spin_lock_irqsave(&dev->pci_irqmask_lock, flags); + + v = cx_read(PCI_INT_MSK); + + spin_unlock_irqrestore(&dev->pci_irqmask_lock, flags); + return v; +} + static int cx23885_risc_decode(u32 risc) { static char *instr[16] = { @@ -548,7 +625,7 @@ static void cx23885_shutdown(struct cx23885_dev *dev) cx_write(UART_CTL, 0); /* Disable Interrupts */ - cx_write(PCI_INT_MSK, 0); + cx23885_irq_disable_all(dev); cx_write(VID_A_INT_MSK, 0); cx_write(VID_B_INT_MSK, 0); cx_write(VID_C_INT_MSK, 0); @@ -774,6 +851,8 @@ static int cx23885_dev_setup(struct cx23885_dev *dev) { int i; + spin_lock_init(&dev->pci_irqmask_lock); + mutex_init(&dev->lock); mutex_init(&dev->gpio_lock); @@ -820,9 +899,9 @@ static int cx23885_dev_setup(struct cx23885_dev *dev) dev->pci_bus = dev->pci->bus->number; dev->pci_slot = PCI_SLOT(dev->pci->devfn); - dev->pci_irqmask = 0x001f00; + cx23885_irq_add(dev, 0x001f00); if (cx23885_boards[dev->board].cimax > 0) - dev->pci_irqmask |= 0x01800000; /* for CiMaxes */ + cx23885_irq_add(dev, 0x01800000); /* for CiMaxes */ /* External Master 1 Bus */ dev->i2c_bus[0].nr = 0; @@ -1156,7 +1235,7 @@ static void cx23885_tsport_reg_dump(struct cx23885_tsport *port) dprintk(1, "%s() DEV_CNTRL2 0x%08X\n", __func__, cx_read(DEV_CNTRL2)); dprintk(1, "%s() PCI_INT_MSK 0x%08X\n", __func__, - cx_read(PCI_INT_MSK)); + cx23885_irq_get_mask(dev)); dprintk(1, "%s() AUD_INT_INT_MSK 0x%08X\n", __func__, cx_read(AUDIO_INT_INT_MSK)); dprintk(1, "%s() AUD_INT_DMA_CTL 0x%08X\n", __func__, @@ -1292,7 +1371,8 @@ static int cx23885_start_dma(struct cx23885_tsport *port, dprintk(1, "%s() enabling TS int's and DMA\n", __func__); cx_set(port->reg_ts_int_msk, port->ts_int_msk_val); cx_set(port->reg_dma_ctl, port->dma_ctl_val); - cx_set(PCI_INT_MSK, dev->pci_irqmask | port->pci_irqmask); + cx23885_irq_add(dev, port->pci_irqmask); + cx23885_irq_enable_all(dev); break; default: BUG(); @@ -1653,7 +1733,7 @@ static irqreturn_t cx23885_irq(int irq, void *dev_id) bool subdev_handled; pci_status = cx_read(PCI_INT_STAT); - pci_mask = cx_read(PCI_INT_MSK); + pci_mask = cx23885_irq_get_mask(dev); vida_status = cx_read(VID_A_INT_STAT); vida_mask = cx_read(VID_A_INT_MSK); ts1_status = cx_read(VID_B_INT_STAT); @@ -1977,7 +2057,7 @@ static int __devinit cx23885_initdev(struct pci_dev *pci_dev, switch (dev->board) { case CX23885_BOARD_NETUP_DUAL_DVBS2_CI: - cx_set(PCI_INT_MSK, 0x01800000); /* for NetUP */ + cx23885_irq_add_enable(dev, 0x01800000); /* for NetUP */ break; } diff --git a/drivers/media/video/cx23885/cx23885-vbi.c b/drivers/media/video/cx23885/cx23885-vbi.c index 708a8c7..c0b6038 100644 --- a/drivers/media/video/cx23885/cx23885-vbi.c +++ b/drivers/media/video/cx23885/cx23885-vbi.c @@ -74,7 +74,7 @@ static int cx23885_start_vbi_dma(struct cx23885_dev *dev, q->count = 1; /* enable irqs */ - cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | 0x01); + cx23885_irq_add_enable(dev, 0x01); cx_set(VID_A_INT_MSK, 0x000022); /* start dma */ diff --git a/drivers/media/video/cx23885/cx23885-video.c b/drivers/media/video/cx23885/cx23885-video.c index 2519455..da66e5f 100644 --- a/drivers/media/video/cx23885/cx23885-video.c +++ b/drivers/media/video/cx23885/cx23885-video.c @@ -441,7 +441,7 @@ static int cx23885_start_video_dma(struct cx23885_dev *dev, q->count = 1; /* enable irq */ - cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | 0x01); + cx23885_irq_add_enable(dev, 0x01); cx_set(VID_A_INT_MSK, 0x000011); /* start dma */ @@ -1465,7 +1465,7 @@ static const struct v4l2_file_operations radio_fops = { void cx23885_video_unregister(struct cx23885_dev *dev) { dprintk(1, "%s()\n", __func__); - cx_clear(PCI_INT_MSK, 1); + cx23885_irq_remove(dev, 0x01); if (dev->video_dev) { if (video_is_registered(dev->video_dev)) @@ -1502,7 +1502,8 @@ int cx23885_video_register(struct cx23885_dev *dev) VID_A_DMA_CTL, 0x11, 0x00); /* Don't enable VBI yet */ - cx_set(PCI_INT_MSK, 1); + + cx23885_irq_add_enable(dev, 0x01); if (TUNER_ABSENT != dev->tuner_type) { struct v4l2_subdev *sd = NULL; diff --git a/drivers/media/video/cx23885/cx23885.h b/drivers/media/video/cx23885/cx23885.h index 460f430..5bf6ed0 100644 --- a/drivers/media/video/cx23885/cx23885.h +++ b/drivers/media/video/cx23885/cx23885.h @@ -325,6 +325,7 @@ struct cx23885_dev { u32 __iomem *lmmio; u8 __iomem *bmmio; int pci_irqmask; + spinlock_t pci_irqmask_lock; /* protects mask reg too */ int hwrevision; /* This valud is board specific and is used to configure the @@ -485,6 +486,10 @@ extern u32 cx23885_gpio_get(struct cx23885_dev *dev, u32 mask); extern void cx23885_gpio_enable(struct cx23885_dev *dev, u32 mask, int asoutput); +extern void cx23885_irq_add_enable(struct cx23885_dev *dev, u32 mask); +extern void cx23885_irq_enable(struct cx23885_dev *dev, u32 mask); +extern void cx23885_irq_disable(struct cx23885_dev *dev, u32 mask); +extern void cx23885_irq_remove(struct cx23885_dev *dev, u32 mask); /* ----------------------------------------------------------- */ /* cx23885-cards.c */

[15/17] cx23885: Protect PCI interrupt mask manipulations with a spinlock

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