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linux/drivers/char/agp/sis-agp.c
Vaibhav Gupta 6d1adc3d46 sis-agp: convert to generic power management 
Convert sis-agp from legacy PCI power management to the generic power
management framework.

Previously, sis-agp used legacy PCI power management, and agp_sis_suspend()
and agp_sis_resume() were responsible for both device-specific things and
generic PCI things:

  agp_sis_suspend
    pci_save_state(pdev)                <-- generic PCI
    pci_set_power_state(pdev, pci_choose_state(pdev, state)) <-- generic PCI

  agp_sis_resume
    pci_set_power_state(pdev, PCI_D0)   <-- generic PCI
    pci_restore_state(pdev)             <-- generic PCI
    sis_driver.configure()              <-- device-specific

With generic power management, the PCI bus PM methods do the generic PCI
things, and the driver needs only the device-specific part, i.e.,

  suspend_devices_and_enter
    dpm_suspend_start(PMSG_SUSPEND)
      pci_pm_suspend                    # PCI bus .suspend() method
        agp_sis_suspend                 <-- not needed at all; removed
    suspend_enter
      dpm_suspend_noirq(PMSG_SUSPEND)
        pci_pm_suspend_noirq            # PCI bus .suspend_noirq() method
          pci_save_state                <-- generic PCI
          pci_prepare_to_sleep          <-- generic PCI
            pci_set_power_state
    ...
    dpm_resume_end(PMSG_RESUME)
      pci_pm_resume                     # PCI bus .resume() method
        pci_restore_standard_config
          pci_set_power_state(PCI_D0)   <-- generic PCI
          pci_restore_state             <-- generic PCI
        agp_sis_resume                  # dev->driver->pm->resume
          sis_driver.configure()        <-- device-specific

[bhelgaas: commit log]
Link: https://lore.kernel.org/r/20211208193305.147072-3-helgaas@kernel.org
Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Dave Airlie <airlied@redhat.com>
2021-12-14 11:26:03 -06:00

440 lines
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/*
* 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
#define PCI_DEVICE_ID_SI_662 0x0662
#define PCI_DEVICE_ID_SI_671 0x0671
static bool agp_sis_force_delay = 0;
static int 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 & ~(0x07)) ==
(values[i].size_value & ~(0x07)))) {
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)
{
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);
agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
AGP_APERTURE_BAR);
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;
dev_info(&agp_bridge->dev->dev, "AGP %d.%d bridge\n",
agp_bridge->major_version, agp_bridge->minor_version);
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;
dev_info(&agp_bridge->dev->dev, "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) {
dev_info(&agp_bridge->dev->dev, "SiS delay workaround: giving bridge time to recover\n");
msleep(10);
}
}
}
static const 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,
.needs_scratch_page = true,
.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_alloc_pages = agp_generic_alloc_pages,
.agp_destroy_page = agp_generic_destroy_page,
.agp_destroy_pages = agp_generic_destroy_pages,
.agp_type_to_mask_type = agp_generic_type_to_mask_type,
};
// chipsets that require the 'delay hack'
static int sis_broken_chipsets[] = {
PCI_DEVICE_ID_SI_648,
PCI_DEVICE_ID_SI_746,
0 // terminator
};
static void 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 agp_sis_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct agp_bridge_data *bridge;
u8 cap_ptr;
cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
if (!cap_ptr)
return -ENODEV;
dev_info(&pdev->dev, "SiS chipset [%04x/%04x]\n",
pdev->vendor, pdev->device);
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 agp_sis_remove(struct pci_dev *pdev)
{
struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
agp_remove_bridge(bridge);
agp_put_bridge(bridge);
}
#define agp_sis_suspend NULL
static int __maybe_unused agp_sis_resume(
__attribute__((unused)) struct device *dev)
{
return sis_driver.configure();
}
static const struct pci_device_id agp_sis_pci_table[] = {
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_5591,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_530,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_540,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_550,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_620,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_630,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_635,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_645,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_646,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_648,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_650,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_651,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_655,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_661,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_662,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_671,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_730,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_735,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_740,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_741,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_745,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_DEVICE_ID_SI_746,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{ }
};
MODULE_DEVICE_TABLE(pci, agp_sis_pci_table);
static SIMPLE_DEV_PM_OPS(agp_sis_pm_ops, agp_sis_suspend, agp_sis_resume);
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,
.driver.pm = &agp_sis_pm_ops,
};
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");
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