From 0d1bad216c43bcee84cc24d1ed003c19134d2645 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Sat, 26 Apr 2008 22:25:19 +0200 Subject: [PATCH] ide: manage resources for PCI devices in ide_pci_enable() (take 3) * Reserve PCI BARs 0-3 (0-1 for single port controllers) in ide_pci_enable() and remove ide_hwif_request_regions() call from ide_device_add_all() (also cleanup resource management in scc_pata host driver). * Fix handling of PCI BAR 4 in ide_pci_enable(), then cleanup ide_iomio_dma() (+ init_hwif_trm290() in trm290 host driver) and remove ide_release[_iomio]_dma(). v2: * Fixup trm290 host driver. v3: * Because of scc_pata host driver changes we need to call pci_request_selected_regions() also in setup_mmio_scc(). Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-dma.c | 43 +++----------------------------------- drivers/ide/ide-probe.c | 6 ------ drivers/ide/ide.c | 2 +- drivers/ide/pci/scc_pata.c | 31 ++++++++------------------- drivers/ide/pci/trm290.c | 6 ------ drivers/ide/setup-pci.c | 22 ++++++++++++------- include/linux/ide.h | 4 ++-- 7 files changed, 30 insertions(+), 84 deletions(-) diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c index dc4bc06f98..986ec465cb 100644 --- a/drivers/ide/ide-dma.c +++ b/drivers/ide/ide-dma.c @@ -810,7 +810,7 @@ void ide_dma_timeout (ide_drive_t *drive) EXPORT_SYMBOL(ide_dma_timeout); -static void ide_release_dma_engine(ide_hwif_t *hwif) +void ide_release_dma_engine(ide_hwif_t *hwif) { if (hwif->dmatable_cpu) { struct pci_dev *pdev = to_pci_dev(hwif->dev); @@ -821,27 +821,6 @@ static void ide_release_dma_engine(ide_hwif_t *hwif) } } -static int ide_release_iomio_dma(ide_hwif_t *hwif) -{ - release_region(hwif->dma_base, 8); - if (hwif->extra_ports) - release_region(hwif->extra_base, hwif->extra_ports); - return 1; -} - -/* - * Needed for allowing full modular support of ide-driver - */ -int ide_release_dma(ide_hwif_t *hwif) -{ - ide_release_dma_engine(hwif); - - if (hwif->mmio) - return 1; - else - return ide_release_iomio_dma(hwif); -} - static int ide_allocate_dma_engine(ide_hwif_t *hwif) { struct pci_dev *pdev = to_pci_dev(hwif->dev); @@ -871,25 +850,9 @@ static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base) printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx", hwif->name, base, base + 7); - if (!request_region(base, 8, hwif->name)) { - printk(" -- Error, ports in use.\n"); - return 1; - } - - if (hwif->cds->extra) { + if (hwif->cds->extra) hwif->extra_base = base + (hwif->channel ? 8 : 16); - if (!hwif->mate || !hwif->mate->extra_ports) { - if (!request_region(hwif->extra_base, - hwif->cds->extra, hwif->cds->name)) { - printk(" -- Error, extra ports in use.\n"); - release_region(base, 8); - return 1; - } - hwif->extra_ports = hwif->cds->extra; - } - } - return 0; } @@ -909,7 +872,7 @@ void ide_setup_dma(ide_hwif_t *hwif, unsigned long base) return; if (ide_allocate_dma_engine(hwif)) { - ide_release_dma(hwif); + ide_release_dma_engine(hwif); return; } diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c index 670d7f9ccf..4a8a482b43 100644 --- a/drivers/ide/ide-probe.c +++ b/drivers/ide/ide-probe.c @@ -1530,12 +1530,6 @@ int ide_device_add_all(u8 *idx, const struct ide_port_info *d) hwif = &ide_hwifs[idx[i]]; - if (ide_hwif_request_regions(hwif)) { - printk(KERN_ERR "%s: ports already in use, " - "skipping probe\n", hwif->name); - continue; - } - if (ide_probe_port(hwif) == 0) hwif->present = 1; diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c index 629383dd37..694d997ce5 100644 --- a/drivers/ide/ide.c +++ b/drivers/ide/ide.c @@ -413,7 +413,7 @@ void ide_unregister(unsigned int index) spin_lock_irq(&ide_lock); if (hwif->dma_base) - (void)ide_release_dma(hwif); + ide_release_dma_engine(hwif); /* restore hwif data to pristine status */ ide_init_port_data(hwif, index); diff --git a/drivers/ide/pci/scc_pata.c b/drivers/ide/pci/scc_pata.c index c01e2da5c9..41a993f3de 100644 --- a/drivers/ide/pci/scc_pata.c +++ b/drivers/ide/pci/scc_pata.c @@ -483,7 +483,7 @@ static int setup_mmio_scc (struct pci_dev *dev, const char *name) unsigned long dma_size = pci_resource_len(dev, 1); void __iomem *ctl_addr; void __iomem *dma_addr; - int i; + int i, ret; for (i = 0; i < MAX_HWIFS; i++) { if (scc_ports[i].ctl == 0) @@ -492,21 +492,17 @@ static int setup_mmio_scc (struct pci_dev *dev, const char *name) if (i >= MAX_HWIFS) return -ENOMEM; - if (!request_mem_region(ctl_base, ctl_size, name)) { - printk(KERN_WARNING "%s: IDE controller MMIO ports not available.\n", SCC_PATA_NAME); - goto fail_0; - } - - if (!request_mem_region(dma_base, dma_size, name)) { - printk(KERN_WARNING "%s: IDE controller MMIO ports not available.\n", SCC_PATA_NAME); - goto fail_1; + ret = pci_request_selected_regions(dev, (1 << 2) - 1, name); + if (ret < 0) { + printk(KERN_ERR "%s: can't reserve resources\n", name); + return ret; } if ((ctl_addr = ioremap(ctl_base, ctl_size)) == NULL) - goto fail_2; + goto fail_0; if ((dma_addr = ioremap(dma_base, dma_size)) == NULL) - goto fail_3; + goto fail_1; pci_set_master(dev); scc_ports[i].ctl = (unsigned long)ctl_addr; @@ -515,12 +511,8 @@ static int setup_mmio_scc (struct pci_dev *dev, const char *name) return 1; - fail_3: - iounmap(ctl_addr); - fail_2: - release_mem_region(dma_base, dma_size); fail_1: - release_mem_region(ctl_base, ctl_size); + iounmap(ctl_addr); fail_0: return -ENOMEM; } @@ -757,10 +749,6 @@ static void __devexit scc_remove(struct pci_dev *dev) { struct scc_ports *ports = pci_get_drvdata(dev); ide_hwif_t *hwif = ports->hwif; - unsigned long ctl_base = pci_resource_start(dev, 0); - unsigned long dma_base = pci_resource_start(dev, 1); - unsigned long ctl_size = pci_resource_len(dev, 0); - unsigned long dma_size = pci_resource_len(dev, 1); if (hwif->dmatable_cpu) { pci_free_consistent(dev, PRD_ENTRIES * PRD_BYTES, @@ -773,8 +761,7 @@ static void __devexit scc_remove(struct pci_dev *dev) hwif->chipset = ide_unknown; iounmap((void*)ports->dma); iounmap((void*)ports->ctl); - release_mem_region(dma_base, dma_size); - release_mem_region(ctl_base, ctl_size); + pci_release_selected_regions(dev, (1 << 2) - 1); memset(ports, 0, sizeof(*ports)); } diff --git a/drivers/ide/pci/trm290.c b/drivers/ide/pci/trm290.c index 47265030f8..0677ab016e 100644 --- a/drivers/ide/pci/trm290.c +++ b/drivers/ide/pci/trm290.c @@ -257,16 +257,10 @@ static void __devinit init_hwif_trm290(ide_hwif_t *hwif) printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx", hwif->name, hwif->dma_base, hwif->dma_base + 3); - if (!request_region(hwif->dma_base, 4, hwif->name)) { - printk(KERN_CONT " -- Error, ports in use.\n"); - return; - } - hwif->dmatable_cpu = pci_alloc_consistent(dev, PRD_ENTRIES * PRD_BYTES, &hwif->dmatable_dma); if (!hwif->dmatable_cpu) { printk(KERN_CONT " -- Error, unable to allocate DMA table.\n"); - release_region(hwif->dma_base, 4); return; } printk(KERN_CONT "\n"); diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c index 6302010fd8..8812eaa7f1 100644 --- a/drivers/ide/setup-pci.c +++ b/drivers/ide/setup-pci.c @@ -158,7 +158,7 @@ EXPORT_SYMBOL_GPL(ide_setup_pci_noise); static int ide_pci_enable(struct pci_dev *dev, const struct ide_port_info *d) { - int ret; + int ret, bars; if (pci_enable_device(dev)) { ret = pci_enable_device_io(dev); @@ -181,13 +181,21 @@ static int ide_pci_enable(struct pci_dev *dev, const struct ide_port_info *d) goto out; } - /* FIXME: Temporary - until we put in the hotplug interface logic - Check that the bits we want are not in use by someone else. */ - ret = pci_request_region(dev, 4, "ide_tmp"); - if (ret < 0) - goto out; + if (d->host_flags & IDE_HFLAG_SINGLE) + bars = (1 << 2) - 1; + else + bars = (1 << 4) - 1; - pci_release_region(dev, 4); + if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { + if (d->host_flags & IDE_HFLAG_CS5520) + bars |= (1 << 2); + else + bars |= (1 << 4); + } + + ret = pci_request_selected_regions(dev, bars, d->name); + if (ret < 0) + printk(KERN_ERR "%s: can't reserve resources\n", d->name); out: return ret; } diff --git a/include/linux/ide.h b/include/linux/ide.h index a2d7800a4d..4204d1f35e 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -1158,7 +1158,7 @@ void ide_destroy_dmatable(ide_drive_t *); #ifdef CONFIG_BLK_DEV_IDEDMA_SFF extern int ide_build_dmatable(ide_drive_t *, struct request *); -extern int ide_release_dma(ide_hwif_t *); +extern void ide_release_dma_engine(ide_hwif_t *); extern void ide_setup_dma(ide_hwif_t *, unsigned long); void ide_dma_host_set(ide_drive_t *, int); @@ -1182,7 +1182,7 @@ static inline void ide_check_dma_crc(ide_drive_t *drive) { ; } #endif /* CONFIG_BLK_DEV_IDEDMA */ #ifndef CONFIG_BLK_DEV_IDEDMA_SFF -static inline void ide_release_dma(ide_hwif_t *drive) {;} +static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; } #endif #ifdef CONFIG_BLK_DEV_IDEACPI -- 2.39.5