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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-10 18:05:17 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-10 18:05:17 (GMT) |
commit | 041c79514af9080c75197078283134f538f46b44 (patch) | |
tree | d5e465d5967d84adb37d735fddec48ee0509b93c /drivers/dma/dw | |
parent | 7d884710bb3635f94dac152ae226ca54a585a223 (diff) | |
parent | 34635b1accb99b3c3ad3b35a210be198701aac7e (diff) | |
download | linux-041c79514af9080c75197078283134f538f46b44.tar.xz |
Merge tag 'dmaengine-4.4-rc1' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine updates from Vinod Koul:
"This time we have a very typical update which is mostly fixes and
updates to drivers and no new drivers.
- the biggest change is coming from Peter for edma cleanup which even
caused some last minute regression, things seem settled now
- idma64 and dw updates
- iotdma updates
- module autoload fixes for various drivers
- scatter gather support for hdmac"
* tag 'dmaengine-4.4-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (77 commits)
dmaengine: edma: Add dummy driver skeleton for edma3-tptc
Revert "ARM: DTS: am33xx: Use the new DT bindings for the eDMA3"
Revert "ARM: DTS: am437x: Use the new DT bindings for the eDMA3"
dmaengine: dw: some Intel devices has no memcpy support
dmaengine: dw: platform: provide platform data for Intel
dmaengine: dw: don't override platform data with autocfg
dmaengine: hdmac: Add scatter-gathered memset support
dmaengine: hdmac: factorise memset descriptor allocation
dmaengine: virt-dma: Fix kernel-doc annotations
ARM: DTS: am437x: Use the new DT bindings for the eDMA3
ARM: DTS: am33xx: Use the new DT bindings for the eDMA3
dmaengine: edma: New device tree binding
dmaengine: Kconfig: edma: Select TI_DMA_CROSSBAR in case of ARCH_OMAP
dmaengine: ti-dma-crossbar: Add support for crossbar on AM33xx/AM43xx
dmaengine: edma: Merge the of parsing functions
dmaengine: edma: Do not allocate memory for edma_rsv_info in case of DT boot
dmaengine: edma: Refactor the dma device and channel struct initialization
dmaengine: edma: Get qDMA channel information from HW also
dmaengine: edma: Merge map_dmach_to_queue into assign_channel_eventq
dmaengine: edma: Correct PaRAM access function names (_parm_ to _param_)
...
Diffstat (limited to 'drivers/dma/dw')
-rw-r--r-- | drivers/dma/dw/core.c | 75 | ||||
-rw-r--r-- | drivers/dma/dw/pci.c | 20 | ||||
-rw-r--r-- | drivers/dma/dw/platform.c | 17 |
3 files changed, 61 insertions, 51 deletions
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index bedce03..7067b6d 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -163,7 +163,7 @@ static void dwc_initialize(struct dw_dma_chan *dwc) /*----------------------------------------------------------------------*/ -static inline unsigned int dwc_fast_fls(unsigned long long v) +static inline unsigned int dwc_fast_ffs(unsigned long long v) { /* * We can be a lot more clever here, but this should take care @@ -712,7 +712,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, dw->data_width[dwc->dst_master]); src_width = dst_width = min_t(unsigned int, data_width, - dwc_fast_fls(src | dest | len)); + dwc_fast_ffs(src | dest | len)); ctllo = DWC_DEFAULT_CTLLO(chan) | DWC_CTLL_DST_WIDTH(dst_width) @@ -791,7 +791,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, switch (direction) { case DMA_MEM_TO_DEV: - reg_width = __fls(sconfig->dst_addr_width); + reg_width = __ffs(sconfig->dst_addr_width); reg = sconfig->dst_addr; ctllo = (DWC_DEFAULT_CTLLO(chan) | DWC_CTLL_DST_WIDTH(reg_width) @@ -811,7 +811,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, len = sg_dma_len(sg); mem_width = min_t(unsigned int, - data_width, dwc_fast_fls(mem | len)); + data_width, dwc_fast_ffs(mem | len)); slave_sg_todev_fill_desc: desc = dwc_desc_get(dwc); @@ -848,7 +848,7 @@ slave_sg_todev_fill_desc: } break; case DMA_DEV_TO_MEM: - reg_width = __fls(sconfig->src_addr_width); + reg_width = __ffs(sconfig->src_addr_width); reg = sconfig->src_addr; ctllo = (DWC_DEFAULT_CTLLO(chan) | DWC_CTLL_SRC_WIDTH(reg_width) @@ -868,7 +868,7 @@ slave_sg_todev_fill_desc: len = sg_dma_len(sg); mem_width = min_t(unsigned int, - data_width, dwc_fast_fls(mem | len)); + data_width, dwc_fast_ffs(mem | len)); slave_sg_fromdev_fill_desc: desc = dwc_desc_get(dwc); @@ -1499,9 +1499,8 @@ EXPORT_SYMBOL(dw_dma_cyclic_free); int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) { struct dw_dma *dw; - bool autocfg; + bool autocfg = false; unsigned int dw_params; - unsigned int nr_channels; unsigned int max_blk_size = 0; int err; int i; @@ -1515,33 +1514,42 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) pm_runtime_get_sync(chip->dev); - dw_params = dma_read_byaddr(chip->regs, DW_PARAMS); - autocfg = dw_params >> DW_PARAMS_EN & 0x1; + if (!pdata) { + dw_params = dma_read_byaddr(chip->regs, DW_PARAMS); + dev_dbg(chip->dev, "DW_PARAMS: 0x%08x\n", dw_params); - dev_dbg(chip->dev, "DW_PARAMS: 0x%08x\n", dw_params); + autocfg = dw_params >> DW_PARAMS_EN & 1; + if (!autocfg) { + err = -EINVAL; + goto err_pdata; + } - if (!pdata && autocfg) { pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) { err = -ENOMEM; goto err_pdata; } + /* Get hardware configuration parameters */ + pdata->nr_channels = (dw_params >> DW_PARAMS_NR_CHAN & 7) + 1; + pdata->nr_masters = (dw_params >> DW_PARAMS_NR_MASTER & 3) + 1; + for (i = 0; i < pdata->nr_masters; i++) { + pdata->data_width[i] = + (dw_params >> DW_PARAMS_DATA_WIDTH(i) & 3) + 2; + } + max_blk_size = dma_readl(dw, MAX_BLK_SIZE); + /* Fill platform data with the default values */ pdata->is_private = true; + pdata->is_memcpy = true; pdata->chan_allocation_order = CHAN_ALLOCATION_ASCENDING; pdata->chan_priority = CHAN_PRIORITY_ASCENDING; - } else if (!pdata || pdata->nr_channels > DW_DMA_MAX_NR_CHANNELS) { + } else if (pdata->nr_channels > DW_DMA_MAX_NR_CHANNELS) { err = -EINVAL; goto err_pdata; } - if (autocfg) - nr_channels = (dw_params >> DW_PARAMS_NR_CHAN & 0x7) + 1; - else - nr_channels = pdata->nr_channels; - - dw->chan = devm_kcalloc(chip->dev, nr_channels, sizeof(*dw->chan), + dw->chan = devm_kcalloc(chip->dev, pdata->nr_channels, sizeof(*dw->chan), GFP_KERNEL); if (!dw->chan) { err = -ENOMEM; @@ -1549,22 +1557,12 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) } /* Get hardware configuration parameters */ - if (autocfg) { - max_blk_size = dma_readl(dw, MAX_BLK_SIZE); - - dw->nr_masters = (dw_params >> DW_PARAMS_NR_MASTER & 3) + 1; - for (i = 0; i < dw->nr_masters; i++) { - dw->data_width[i] = - (dw_params >> DW_PARAMS_DATA_WIDTH(i) & 3) + 2; - } - } else { - dw->nr_masters = pdata->nr_masters; - for (i = 0; i < dw->nr_masters; i++) - dw->data_width[i] = pdata->data_width[i]; - } + dw->nr_masters = pdata->nr_masters; + for (i = 0; i < dw->nr_masters; i++) + dw->data_width[i] = pdata->data_width[i]; /* Calculate all channel mask before DMA setup */ - dw->all_chan_mask = (1 << nr_channels) - 1; + dw->all_chan_mask = (1 << pdata->nr_channels) - 1; /* Force dma off, just in case */ dw_dma_off(dw); @@ -1589,7 +1587,7 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) goto err_pdata; INIT_LIST_HEAD(&dw->dma.channels); - for (i = 0; i < nr_channels; i++) { + for (i = 0; i < pdata->nr_channels; i++) { struct dw_dma_chan *dwc = &dw->chan[i]; dwc->chan.device = &dw->dma; @@ -1602,7 +1600,7 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) /* 7 is highest priority & 0 is lowest. */ if (pdata->chan_priority == CHAN_PRIORITY_ASCENDING) - dwc->priority = nr_channels - i - 1; + dwc->priority = pdata->nr_channels - i - 1; else dwc->priority = i; @@ -1656,10 +1654,13 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) dma_writel(dw, CLEAR.DST_TRAN, dw->all_chan_mask); dma_writel(dw, CLEAR.ERROR, dw->all_chan_mask); - dma_cap_set(DMA_MEMCPY, dw->dma.cap_mask); + /* Set capabilities */ dma_cap_set(DMA_SLAVE, dw->dma.cap_mask); if (pdata->is_private) dma_cap_set(DMA_PRIVATE, dw->dma.cap_mask); + if (pdata->is_memcpy) + dma_cap_set(DMA_MEMCPY, dw->dma.cap_mask); + dw->dma.dev = chip->dev; dw->dma.device_alloc_chan_resources = dwc_alloc_chan_resources; dw->dma.device_free_chan_resources = dwc_free_chan_resources; @@ -1687,7 +1688,7 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata) goto err_dma_register; dev_info(chip->dev, "DesignWare DMA Controller, %d channels\n", - nr_channels); + pdata->nr_channels); pm_runtime_put_sync_suspend(chip->dev); diff --git a/drivers/dma/dw/pci.c b/drivers/dma/dw/pci.c index b144706..4c30fdd 100644 --- a/drivers/dma/dw/pci.c +++ b/drivers/dma/dw/pci.c @@ -15,12 +15,6 @@ #include "internal.h" -static struct dw_dma_platform_data dw_pci_pdata = { - .is_private = 1, - .chan_allocation_order = CHAN_ALLOCATION_ASCENDING, - .chan_priority = CHAN_PRIORITY_ASCENDING, -}; - static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) { struct dw_dma_chip *chip; @@ -101,19 +95,19 @@ static const struct dev_pm_ops dw_pci_dev_pm_ops = { static const struct pci_device_id dw_pci_id_table[] = { /* Medfield */ - { PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_pci_pdata }, - { PCI_VDEVICE(INTEL, 0x0830), (kernel_ulong_t)&dw_pci_pdata }, + { PCI_VDEVICE(INTEL, 0x0827) }, + { PCI_VDEVICE(INTEL, 0x0830) }, /* BayTrail */ - { PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_pci_pdata }, - { PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_pci_pdata }, + { PCI_VDEVICE(INTEL, 0x0f06) }, + { PCI_VDEVICE(INTEL, 0x0f40) }, /* Braswell */ - { PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_pci_pdata }, - { PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_pci_pdata }, + { PCI_VDEVICE(INTEL, 0x2286) }, + { PCI_VDEVICE(INTEL, 0x22c0) }, /* Haswell */ - { PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_pci_pdata }, + { PCI_VDEVICE(INTEL, 0x9c60) }, { } }; MODULE_DEVICE_TABLE(pci, dw_pci_id_table); diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c index b2c3ae0..68a4815 100644 --- a/drivers/dma/dw/platform.c +++ b/drivers/dma/dw/platform.c @@ -155,6 +155,7 @@ static int dw_probe(struct platform_device *pdev) struct dw_dma_chip *chip; struct device *dev = &pdev->dev; struct resource *mem; + const struct acpi_device_id *id; struct dw_dma_platform_data *pdata; int err; @@ -178,6 +179,11 @@ static int dw_probe(struct platform_device *pdev) pdata = dev_get_platdata(dev); if (!pdata) pdata = dw_dma_parse_dt(pdev); + if (!pdata && has_acpi_companion(dev)) { + id = acpi_match_device(dev->driver->acpi_match_table, dev); + if (id) + pdata = (struct dw_dma_platform_data *)id->driver_data; + } chip->dev = dev; @@ -246,8 +252,17 @@ MODULE_DEVICE_TABLE(of, dw_dma_of_id_table); #endif #ifdef CONFIG_ACPI +static struct dw_dma_platform_data dw_dma_acpi_pdata = { + .nr_channels = 8, + .is_private = true, + .chan_allocation_order = CHAN_ALLOCATION_ASCENDING, + .chan_priority = CHAN_PRIORITY_ASCENDING, + .block_size = 4095, + .nr_masters = 2, +}; + static const struct acpi_device_id dw_dma_acpi_id_table[] = { - { "INTL9C60", 0 }, + { "INTL9C60", (kernel_ulong_t)&dw_dma_acpi_pdata }, { } }; MODULE_DEVICE_TABLE(acpi, dw_dma_acpi_id_table); |