On Fri, Jul 13, 2012 at 02:44:59PM -0700, Jon Mason wrote:
> +static int max_num_cbs = 2;
> +module_param(max_num_cbs, uint, 0644);
> +MODULE_PARM_DESC(max_num_cbs, "Maximum number of NTB transport connections");
> +
> +static bool no_msix;
> +module_param(no_msix, bool, 0644);
> +MODULE_PARM_DESC(no_msix, "Do not allow MSI-X interrupts to be selected");
How would a user, or a distro, know to set these options? Why are they
even options at all?
> +struct ntb_device {
> + struct pci_dev *pdev;
> + struct msix_entry *msix_entries;
> + void __iomem *reg_base;
> + struct ntb_mw mw[NTB_NUM_MW];
> + struct {
> + unsigned int max_spads;
> + unsigned int max_db_bits;
> + unsigned int msix_cnt;
> + } limits;
> + struct {
> + void __iomem *pdb;
> + void __iomem *pdb_mask;
> + void __iomem *sdb;
> + void __iomem *sbar2_xlat;
> + void __iomem *sbar4_xlat;
> + void __iomem *spad_write;
> + void __iomem *spad_read;
> + void __iomem *lnk_cntl;
> + void __iomem *lnk_stat;
> + void __iomem *spci_cmd;
> + } reg_ofs;
> + void *ntb_transport;
> + void (*event_cb)(void *handle, unsigned int event);
Shouldn't the event be an enum?
> + struct ntb_db_cb *db_cb;
> + unsigned char hw_type;
> + unsigned char conn_type;
> + unsigned char dev_type;
> + unsigned char num_msix;
> + unsigned char bits_per_vector;
> + unsigned char max_cbs;
> + unsigned char link_status;
> + struct delayed_work hb_timer;
> + unsigned long last_ts;
> +};
Why isn't this either a 'struct device' itself, or why isn't the 'struct
pci_device' embedded within it? What controls the lifetime of this
device? Why doesn't it show up in sysfs? Don't you want it to show up
in the global device tree?
> +static DEFINE_PCI_DEVICE_TABLE(ntb_pci_tbl) = {
> + {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_BWD)},
> + {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_JSF)},
> + {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_CLASSIC_JSF)},
> + {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_RP_JSF)},
> + {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_RP_SNB)},
> + {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_B2B_SNB)},
> + {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_NTB_CLASSIC_SNB)},
> + {0}
> +};
> +MODULE_DEVICE_TABLE(pci, ntb_pci_tbl);
> +
> +static struct ntb_device *ntbdev;
You can really only have just one of these in the whole system? Is that
wise? Why isn't it dynamic and tied to the pci device itself as a
child?
thanks,
greg k-h
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