drivers/char/agp/sis-agp.c - kernel/msm-4.9 - Gitiles

 /*
  * SiS AGPGART routines.
  */

 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/agp_backend.h>
 #include <linux/delay.h>
 #include "agp.h"

 #define SIS_ATTBASE	0x90
 #define SIS_APSIZE	0x94
 #define SIS_TLBCNTRL	0x97
 #define SIS_TLBFLUSH	0x98

 static int __devinitdata agp_sis_force_delay = 0;
 static int __devinitdata agp_sis_agp_spec = -1;

 static int sis_fetch_size(void)
 {
 	u8 temp_size;
 	int i;
 	struct aper_size_info_8 *values;

 	pci_read_config_byte(agp_bridge->dev, SIS_APSIZE, &temp_size);
 	values = A_SIZE_8(agp_bridge->driver->aperture_sizes);
 	for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
 		if ((temp_size == values[i].size_value) ||
 		    ((temp_size & ~(0x03)) ==
 		     (values[i].size_value & ~(0x03)))) {
 			agp_bridge->previous_size =
 			    agp_bridge->current_size = (void *) (values + i);

 			agp_bridge->aperture_size_idx = i;
 			return values[i].size;
 		}
 	}

 	return 0;
 }

 static void sis_tlbflush(struct agp_memory *mem)
 {
 	pci_write_config_byte(agp_bridge->dev, SIS_TLBFLUSH, 0x02);
 }

 static int sis_configure(void)
 {
 	u32 temp;
 	struct aper_size_info_8 *current_size;

 	current_size = A_SIZE_8(agp_bridge->current_size);
 	pci_write_config_byte(agp_bridge->dev, SIS_TLBCNTRL, 0x05);
 	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
 	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 	pci_write_config_dword(agp_bridge->dev, SIS_ATTBASE,
 			       agp_bridge->gatt_bus_addr);
 	pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
 			      current_size->size_value);
 	return 0;
 }

 static void sis_cleanup(void)
 {
 	struct aper_size_info_8 *previous_size;

 	previous_size = A_SIZE_8(agp_bridge->previous_size);
 	pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
 			      (previous_size->size_value & ~(0x03)));
 }

 static void sis_delayed_enable(struct agp_bridge_data *bridge, u32 mode)
 {
 	struct pci_dev *device = NULL;
 	u32 command;
 	int rate;

 	printk(KERN_INFO PFX "Found an AGP %d.%d compliant device at %s.\n",
 		agp_bridge->major_version,
 		agp_bridge->minor_version,
 		pci_name(agp_bridge->dev));

 	pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx + PCI_AGP_STATUS, &command);
 	command = agp_collect_device_status(bridge, mode, command);
 	command |= AGPSTAT_AGP_ENABLE;
 	rate = (command & 0x7) << 2;

 	for_each_pci_dev(device) {
 		u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP);
 		if (!agp)
 			continue;

 		printk(KERN_INFO PFX "Putting AGP V3 device at %s into %dx mode\n",
 			pci_name(device), rate);

 		pci_write_config_dword(device, agp + PCI_AGP_COMMAND, command);

 		/*
 		 * Weird: on some sis chipsets any rate change in the target
 		 * command register triggers a 5ms screwup during which the master
 		 * cannot be configured
 		 */
 		if (device->device == bridge->dev->device) {
 			printk(KERN_INFO PFX "SiS delay workaround: giving bridge time to recover.\n");
 			msleep(10);
 		}
 	}
 }

 static struct aper_size_info_8 sis_generic_sizes[7] =
 {
 	{256, 65536, 6, 99},
 	{128, 32768, 5, 83},
 	{64, 16384, 4, 67},
 	{32, 8192, 3, 51},
 	{16, 4096, 2, 35},
 	{8, 2048, 1, 19},
 	{4, 1024, 0, 3}
 };

 static struct agp_bridge_driver sis_driver = {
 	.owner			= THIS_MODULE,
 	.aperture_sizes 	= sis_generic_sizes,
 	.size_type		= U8_APER_SIZE,
 	.num_aperture_sizes	= 7,
 	.configure		= sis_configure,
 	.fetch_size		= sis_fetch_size,
 	.cleanup		= sis_cleanup,
 	.tlb_flush		= sis_tlbflush,
 	.mask_memory		= agp_generic_mask_memory,
 	.masks			= NULL,
 	.agp_enable		= agp_generic_enable,
 	.cache_flush		= global_cache_flush,
 	.create_gatt_table	= agp_generic_create_gatt_table,
 	.free_gatt_table	= agp_generic_free_gatt_table,
 	.insert_memory		= agp_generic_insert_memory,
 	.remove_memory		= agp_generic_remove_memory,
 	.alloc_by_type		= agp_generic_alloc_by_type,
 	.free_by_type		= agp_generic_free_by_type,
 	.agp_alloc_page		= agp_generic_alloc_page,
 	.agp_destroy_page	= agp_generic_destroy_page,
 };

 static struct agp_device_ids sis_agp_device_ids[] __devinitdata =
 {
 	{
 		.device_id	= PCI_DEVICE_ID_SI_5591_AGP,
 		.chipset_name	= "5591",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_530,
 		.chipset_name	= "530",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_540,
 		.chipset_name	= "540",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_550,
 		.chipset_name	= "550",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_620,
 		.chipset_name	= "620",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_630,
 		.chipset_name	= "630",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_635,
 		.chipset_name	= "635",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_645,
 		.chipset_name	= "645",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_646,
 		.chipset_name	= "646",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_648,
 		.chipset_name	= "648",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_650,
 		.chipset_name	= "650",
 	},
 	{
 		.device_id  = PCI_DEVICE_ID_SI_651,
 		.chipset_name   = "651",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_655,
 		.chipset_name	= "655",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_661,
 		.chipset_name	= "661",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_730,
 		.chipset_name	= "730",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_735,
 		.chipset_name	= "735",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_740,
 		.chipset_name	= "740",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_741,
 		.chipset_name	= "741",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_745,
 		.chipset_name	= "745",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_746,
 		.chipset_name	= "746",
 	},
 	{
 		.device_id	= PCI_DEVICE_ID_SI_760,
 		.chipset_name	= "760",
 	},
 	{ }, /* dummy final entry, always present */
 };


 // chipsets that require the 'delay hack'
 static int sis_broken_chipsets[] __devinitdata = {
 	PCI_DEVICE_ID_SI_648,
 	PCI_DEVICE_ID_SI_746,
 	0 // terminator
 };

 static void __devinit sis_get_driver(struct agp_bridge_data *bridge)
 {
 	int i;

 	for(i=0; sis_broken_chipsets[i]!=0; ++i)
 		if(bridge->dev->device==sis_broken_chipsets[i])
 			break;

 	if(sis_broken_chipsets[i] || agp_sis_force_delay)
 		sis_driver.agp_enable=sis_delayed_enable;

 	// sis chipsets that indicate less than agp3.5
 	// are not actually fully agp3 compliant
 	if ((agp_bridge->major_version == 3 && agp_bridge->minor_version >= 5
 	     && agp_sis_agp_spec!=0) || agp_sis_agp_spec==1) {
 		sis_driver.aperture_sizes = agp3_generic_sizes;
 		sis_driver.size_type = U16_APER_SIZE;
 		sis_driver.num_aperture_sizes = AGP_GENERIC_SIZES_ENTRIES;
 		sis_driver.configure = agp3_generic_configure;
 		sis_driver.fetch_size = agp3_generic_fetch_size;
 		sis_driver.cleanup = agp3_generic_cleanup;
 		sis_driver.tlb_flush = agp3_generic_tlbflush;
 	}
 }


 static int __devinit agp_sis_probe(struct pci_dev *pdev,
 				   const struct pci_device_id *ent)
 {
 	struct agp_device_ids *devs = sis_agp_device_ids;
 	struct agp_bridge_data *bridge;
 	u8 cap_ptr;
 	int j;

 	cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 	if (!cap_ptr)
 		return -ENODEV;

 	/* probe for known chipsets */
 	for (j = 0; devs[j].chipset_name; j++) {
 		if (pdev->device == devs[j].device_id) {
 			printk(KERN_INFO PFX "Detected SiS %s chipset\n",
 					devs[j].chipset_name);
 			goto found;
 		}
 	}

 	printk(KERN_ERR PFX "Unsupported SiS chipset (device id: %04x)\n",
 		    pdev->device);
 	return -ENODEV;

 found:
 	bridge = agp_alloc_bridge();
 	if (!bridge)
 		return -ENOMEM;

 	bridge->driver = &sis_driver;
 	bridge->dev = pdev;
 	bridge->capndx = cap_ptr;

 	get_agp_version(bridge);

 	/* Fill in the mode register */
 	pci_read_config_dword(pdev, bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
 	sis_get_driver(bridge);

 	pci_set_drvdata(pdev, bridge);
 	return agp_add_bridge(bridge);
 }

 static void __devexit agp_sis_remove(struct pci_dev *pdev)
 {
 	struct agp_bridge_data *bridge = pci_get_drvdata(pdev);

 	agp_remove_bridge(bridge);
 	agp_put_bridge(bridge);
 }

 static struct pci_device_id agp_sis_pci_table[] = {
 	{
 	.class		= (PCI_CLASS_BRIDGE_HOST << 8),
 	.class_mask	= ~0,
 	.vendor		= PCI_VENDOR_ID_SI,
 	.device		= PCI_ANY_ID,
 	.subvendor	= PCI_ANY_ID,
 	.subdevice	= PCI_ANY_ID,
 	},
 	{ }
 };

 MODULE_DEVICE_TABLE(pci, agp_sis_pci_table);

 static struct pci_driver agp_sis_pci_driver = {
 	.name		= "agpgart-sis",
 	.id_table	= agp_sis_pci_table,
 	.probe		= agp_sis_probe,
 	.remove		= agp_sis_remove,
 };

 static int __init agp_sis_init(void)
 {
 	if (agp_off)
 		return -EINVAL;
 	return pci_register_driver(&agp_sis_pci_driver);
 }

 static void __exit agp_sis_cleanup(void)
 {
 	pci_unregister_driver(&agp_sis_pci_driver);
 }

 module_init(agp_sis_init);
 module_exit(agp_sis_cleanup);

 module_param(agp_sis_force_delay, bool, 0);
 MODULE_PARM_DESC(agp_sis_force_delay,"forces sis delay hack");
 module_param(agp_sis_agp_spec, int, 0);
 MODULE_PARM_DESC(agp_sis_agp_spec,"0=force sis init, 1=force generic agp3 init, default: autodetect");
 MODULE_LICENSE("GPL and additional rights");
	/*
	* SiS AGPGART routines.
	*/

	#include <linux/module.h>
	#include <linux/pci.h>
	#include <linux/init.h>
	#include <linux/agp_backend.h>
	#include <linux/delay.h>
	#include "agp.h"

	#define SIS_ATTBASE 0x90
	#define SIS_APSIZE 0x94
	#define SIS_TLBCNTRL 0x97
	#define SIS_TLBFLUSH 0x98

	static int __devinitdata agp_sis_force_delay = 0;
	static int __devinitdata agp_sis_agp_spec = -1;

	static int sis_fetch_size(void)
	{
	u8 temp_size;
	int i;
	struct aper_size_info_8 *values;

	pci_read_config_byte(agp_bridge->dev, SIS_APSIZE, &temp_size);
	values = A_SIZE_8(agp_bridge->driver->aperture_sizes);
	for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
	if ((temp_size == values[i].size_value) \|\|
	((temp_size & ~(0x03)) ==
	(values[i].size_value & ~(0x03)))) {
	agp_bridge->previous_size =
	agp_bridge->current_size = (void *) (values + i);

	agp_bridge->aperture_size_idx = i;
	return values[i].size;
	}
	}

	return 0;
	}

	static void sis_tlbflush(struct agp_memory *mem)
	{
	pci_write_config_byte(agp_bridge->dev, SIS_TLBFLUSH, 0x02);
	}

	static int sis_configure(void)
	{
	u32 temp;
	struct aper_size_info_8 *current_size;

	current_size = A_SIZE_8(agp_bridge->current_size);
	pci_write_config_byte(agp_bridge->dev, SIS_TLBCNTRL, 0x05);
	pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
	agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
	pci_write_config_dword(agp_bridge->dev, SIS_ATTBASE,
	agp_bridge->gatt_bus_addr);
	pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
	current_size->size_value);
	return 0;
	}

	static void sis_cleanup(void)
	{
	struct aper_size_info_8 *previous_size;

	previous_size = A_SIZE_8(agp_bridge->previous_size);
	pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
	(previous_size->size_value & ~(0x03)));
	}

	static void sis_delayed_enable(struct agp_bridge_data *bridge, u32 mode)
	{
	struct pci_dev *device = NULL;
	u32 command;
	int rate;

	printk(KERN_INFO PFX "Found an AGP %d.%d compliant device at %s.\n",
	agp_bridge->major_version,
	agp_bridge->minor_version,
	pci_name(agp_bridge->dev));

	pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx + PCI_AGP_STATUS, &command);
	command = agp_collect_device_status(bridge, mode, command);
	command \|= AGPSTAT_AGP_ENABLE;
	rate = (command & 0x7) << 2;

	for_each_pci_dev(device) {
	u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP);
	if (!agp)
	continue;

	printk(KERN_INFO PFX "Putting AGP V3 device at %s into %dx mode\n",
	pci_name(device), rate);

	pci_write_config_dword(device, agp + PCI_AGP_COMMAND, command);

	/*
	* Weird: on some sis chipsets any rate change in the target
	* command register triggers a 5ms screwup during which the master
	* cannot be configured
	*/
	if (device->device == bridge->dev->device) {
	printk(KERN_INFO PFX "SiS delay workaround: giving bridge time to recover.\n");
	msleep(10);
	}
	}
	}

	static struct aper_size_info_8 sis_generic_sizes[7] =
	{
	{256, 65536, 6, 99},
	{128, 32768, 5, 83},
	{64, 16384, 4, 67},
	{32, 8192, 3, 51},
	{16, 4096, 2, 35},
	{8, 2048, 1, 19},
	{4, 1024, 0, 3}
	};

	static struct agp_bridge_driver sis_driver = {
	.owner = THIS_MODULE,
	.aperture_sizes = sis_generic_sizes,
	.size_type = U8_APER_SIZE,
	.num_aperture_sizes = 7,
	.configure = sis_configure,
	.fetch_size = sis_fetch_size,
	.cleanup = sis_cleanup,
	.tlb_flush = sis_tlbflush,
	.mask_memory = agp_generic_mask_memory,
	.masks = NULL,
	.agp_enable = agp_generic_enable,
	.cache_flush = global_cache_flush,
	.create_gatt_table = agp_generic_create_gatt_table,
	.free_gatt_table = agp_generic_free_gatt_table,
	.insert_memory = agp_generic_insert_memory,
	.remove_memory = agp_generic_remove_memory,
	.alloc_by_type = agp_generic_alloc_by_type,
	.free_by_type = agp_generic_free_by_type,
	.agp_alloc_page = agp_generic_alloc_page,
	.agp_destroy_page = agp_generic_destroy_page,
	};

	static struct agp_device_ids sis_agp_device_ids[] __devinitdata =
	{
	{
	.device_id = PCI_DEVICE_ID_SI_5591_AGP,
	.chipset_name = "5591",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_530,
	.chipset_name = "530",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_540,
	.chipset_name = "540",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_550,
	.chipset_name = "550",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_620,
	.chipset_name = "620",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_630,
	.chipset_name = "630",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_635,
	.chipset_name = "635",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_645,
	.chipset_name = "645",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_646,
	.chipset_name = "646",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_648,
	.chipset_name = "648",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_650,
	.chipset_name = "650",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_651,
	.chipset_name = "651",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_655,
	.chipset_name = "655",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_661,
	.chipset_name = "661",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_730,
	.chipset_name = "730",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_735,
	.chipset_name = "735",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_740,
	.chipset_name = "740",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_741,
	.chipset_name = "741",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_745,
	.chipset_name = "745",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_746,
	.chipset_name = "746",
	},
	{
	.device_id = PCI_DEVICE_ID_SI_760,
	.chipset_name = "760",
	},
	{ }, /* dummy final entry, always present */
	};


	// chipsets that require the 'delay hack'
	static int sis_broken_chipsets[] __devinitdata = {
	PCI_DEVICE_ID_SI_648,
	PCI_DEVICE_ID_SI_746,
	0 // terminator
	};

	static void __devinit sis_get_driver(struct agp_bridge_data *bridge)
	{
	int i;

	for(i=0; sis_broken_chipsets[i]!=0; ++i)
	if(bridge->dev->device==sis_broken_chipsets[i])
	break;

	if(sis_broken_chipsets[i] \|\| agp_sis_force_delay)
	sis_driver.agp_enable=sis_delayed_enable;

	// sis chipsets that indicate less than agp3.5
	// are not actually fully agp3 compliant
	if ((agp_bridge->major_version == 3 && agp_bridge->minor_version >= 5
	&& agp_sis_agp_spec!=0) \|\| agp_sis_agp_spec==1) {
	sis_driver.aperture_sizes = agp3_generic_sizes;
	sis_driver.size_type = U16_APER_SIZE;
	sis_driver.num_aperture_sizes = AGP_GENERIC_SIZES_ENTRIES;
	sis_driver.configure = agp3_generic_configure;
	sis_driver.fetch_size = agp3_generic_fetch_size;
	sis_driver.cleanup = agp3_generic_cleanup;
	sis_driver.tlb_flush = agp3_generic_tlbflush;
	}
	}


	static int __devinit agp_sis_probe(struct pci_dev *pdev,
	const struct pci_device_id *ent)
	{
	struct agp_device_ids *devs = sis_agp_device_ids;
	struct agp_bridge_data *bridge;
	u8 cap_ptr;
	int j;

	cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
	if (!cap_ptr)
	return -ENODEV;

	/* probe for known chipsets */
	for (j = 0; devs[j].chipset_name; j++) {
	if (pdev->device == devs[j].device_id) {
	printk(KERN_INFO PFX "Detected SiS %s chipset\n",
	devs[j].chipset_name);
	goto found;
	}
	}

	printk(KERN_ERR PFX "Unsupported SiS chipset (device id: %04x)\n",
	pdev->device);
	return -ENODEV;

	found:
	bridge = agp_alloc_bridge();
	if (!bridge)
	return -ENOMEM;

	bridge->driver = &sis_driver;
	bridge->dev = pdev;
	bridge->capndx = cap_ptr;

	get_agp_version(bridge);

	/* Fill in the mode register */
	pci_read_config_dword(pdev, bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
	sis_get_driver(bridge);

	pci_set_drvdata(pdev, bridge);
	return agp_add_bridge(bridge);
	}

	static void __devexit agp_sis_remove(struct pci_dev *pdev)
	{
	struct agp_bridge_data *bridge = pci_get_drvdata(pdev);

	agp_remove_bridge(bridge);
	agp_put_bridge(bridge);
	}

	static struct pci_device_id agp_sis_pci_table[] = {
	{
	.class = (PCI_CLASS_BRIDGE_HOST << 8),
	.class_mask = ~0,
	.vendor = PCI_VENDOR_ID_SI,
	.device = PCI_ANY_ID,
	.subvendor = PCI_ANY_ID,
	.subdevice = PCI_ANY_ID,
	},
	{ }
	};

	MODULE_DEVICE_TABLE(pci, agp_sis_pci_table);

	static struct pci_driver agp_sis_pci_driver = {
	.name = "agpgart-sis",
	.id_table = agp_sis_pci_table,
	.probe = agp_sis_probe,
	.remove = agp_sis_remove,
	};

	static int __init agp_sis_init(void)
	{
	if (agp_off)
	return -EINVAL;
	return pci_register_driver(&agp_sis_pci_driver);
	}

	static void __exit agp_sis_cleanup(void)
	{
	pci_unregister_driver(&agp_sis_pci_driver);
	}

	module_init(agp_sis_init);
	module_exit(agp_sis_cleanup);

	module_param(agp_sis_force_delay, bool, 0);
	MODULE_PARM_DESC(agp_sis_force_delay,"forces sis delay hack");
	module_param(agp_sis_agp_spec, int, 0);
	MODULE_PARM_DESC(agp_sis_agp_spec,"0=force sis init, 1=force generic agp3 init, default: autodetect");
	MODULE_LICENSE("GPL and additional rights");