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scsi: mpt3sas: Add nvme device support in slave alloc, target alloc a…
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…nd probe

1) Added support for probing pcie device and adding NVMe drives to SML
and driver's internal list pcie_device_list.

2) Added support for determing NVMe as boot device.

3) Added nvme device support for call back functions scan_finished
target_alloc,slave_alloc,target destroy and slave destroy.

 a) During scan, pcie devices are probed and added to SML to drivers
internal list.

 b) target_alloc & slave alloc API's allocates resources for
(MPT3SAS_TARGET & MPT3SAS_DEVICE) private datas and holds information
like handle, target_id etc.

 c) slave_destroy & target_destroy are called when driver unregisters
or removes device. Also frees allocated resources and info.

Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Suganath Prabu Subramani authored and Martin K. Petersen committed Nov 3, 2017
1 parent b5c5d0a commit d88e1ea
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Showing 2 changed files with 506 additions and 34 deletions.
110 changes: 104 additions & 6 deletions drivers/scsi/mpt3sas/mpt3sas_base.h
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Original file line number Diff line number Diff line change
Expand Up @@ -161,6 +161,7 @@
#define MPT_TARGET_FLAGS_VOLUME 0x02
#define MPT_TARGET_FLAGS_DELETED 0x04
#define MPT_TARGET_FASTPATH_IO 0x08
#define MPT_TARGET_FLAGS_PCIE_DEVICE 0x10

#define SAS2_PCI_DEVICE_B0_REVISION (0x01)
#define SAS3_PCI_DEVICE_C0_REVISION (0x02)
Expand Down Expand Up @@ -359,7 +360,8 @@ struct Mpi2ManufacturingPage11_t {
* @flags: MPT_TARGET_FLAGS_XXX flags
* @deleted: target flaged for deletion
* @tm_busy: target is busy with TM request.
* @sdev: The sas_device associated with this target
* @sas_dev: The sas_device associated with this target
* @pcie_dev: The pcie device associated with this target
*/
struct MPT3SAS_TARGET {
struct scsi_target *starget;
Expand All @@ -370,7 +372,8 @@ struct MPT3SAS_TARGET {
u32 flags;
u8 deleted;
u8 tm_busy;
struct _sas_device *sdev;
struct _sas_device *sas_dev;
struct _pcie_device *pcie_dev;
};


Expand Down Expand Up @@ -514,6 +517,89 @@ static inline void sas_device_put(struct _sas_device *s)
kref_put(&s->refcount, sas_device_free);
}

/*
* struct _pcie_device - attached PCIe device information
* @list: pcie device list
* @starget: starget object
* @wwid: device WWID
* @handle: device handle
* @device_info: bitfield provides detailed info about the device
* @id: target id
* @channel: target channel
* @slot: slot number
* @port_num: port number
* @responding: used in _scsih_pcie_device_mark_responding
* @fast_path: fast path feature enable bit
* @nvme_mdts: MaximumDataTransferSize from PCIe Device Page 2 for
* NVMe device only
* @enclosure_handle: enclosure handle
* @enclosure_logical_id: enclosure logical identifier
* @enclosure_level: The level of device's enclosure from the controller
* @connector_name: ASCII value of the Connector's name
* @serial_number: pointer of serial number string allocated runtime
* @refcount: reference count for deletion
*/
struct _pcie_device {
struct list_head list;
struct scsi_target *starget;
u64 wwid;
u16 handle;
u32 device_info;
int id;
int channel;
u16 slot;
u8 port_num;
u8 responding;
u8 fast_path;
u32 nvme_mdts;
u16 enclosure_handle;
u64 enclosure_logical_id;
u8 enclosure_level;
u8 connector_name[4];
u8 *serial_number;
struct kref refcount;
};
/**
* pcie_device_get - Increment the pcie device reference count
*
* @p: pcie_device object
*
* When ever this function called it will increment the
* reference count of the pcie device for which this function called.
*
*/
static inline void pcie_device_get(struct _pcie_device *p)
{
kref_get(&p->refcount);
}

/**
* pcie_device_free - Release the pcie device object
* @r - kref object
*
* Free's the pcie device object. It will be called when reference count
* reaches to zero.
*/
static inline void pcie_device_free(struct kref *r)
{
kfree(container_of(r, struct _pcie_device, refcount));
}

/**
* pcie_device_put - Decrement the pcie device reference count
*
* @p: pcie_device object
*
* When ever this function called it will decrement the
* reference count of the pcie device for which this function called.
*
* When refernce count reaches to Zero, this will call pcie_device_free to the
* pcie_device object.
*/
static inline void pcie_device_put(struct _pcie_device *p)
{
kref_put(&p->refcount, pcie_device_free);
}
/**
* struct _raid_device - raid volume link list
* @list: sas device list
Expand Down Expand Up @@ -562,12 +648,13 @@ struct _raid_device {

/**
* struct _boot_device - boot device info
* @is_raid: flag to indicate whether this is volume
* @device: holds pointer for either struct _sas_device or
* struct _raid_device
*
* @channel: sas, raid, or pcie channel
* @device: holds pointer for struct _sas_device, struct _raid_device or
* struct _pcie_device
*/
struct _boot_device {
u8 is_raid;
int channel;
void *device;
};

Expand Down Expand Up @@ -831,6 +918,8 @@ typedef void (*MPT3SAS_FLUSH_RUNNING_CMDS)(struct MPT3SAS_ADAPTER *ioc);
* @bars: bitmask of BAR's that must be configured
* @mask_interrupts: ignore interrupt
* @dma_mask: used to set the consistent dma mask
* @pci_access_mutex: Mutex to synchronize ioctl, sysfs show path and
* pci resource handling
* @fault_reset_work_q_name: fw fault work queue
* @fault_reset_work_q: ""
* @fault_reset_work: ""
Expand Down Expand Up @@ -894,9 +983,13 @@ typedef void (*MPT3SAS_FLUSH_RUNNING_CMDS)(struct MPT3SAS_ADAPTER *ioc);
* @sas_device_list: sas device object list
* @sas_device_init_list: sas device object list (used only at init time)
* @sas_device_lock:
* @pcie_device_list: pcie device object list
* @pcie_device_init_list: pcie device object list (used only at init time)
* @pcie_device_lock:
* @io_missing_delay: time for IO completed by fw when PDR enabled
* @device_missing_delay: time for device missing by fw when PDR enabled
* @sas_id : used for setting volume target IDs
* @pcie_target_id: used for setting pcie target IDs
* @blocking_handles: bitmask used to identify which devices need blocking
* @pd_handles : bitmask for PD handles
* @pd_handles_sz : size of pd_handle bitmask
Expand Down Expand Up @@ -1092,11 +1185,16 @@ struct MPT3SAS_ADAPTER {
struct list_head sas_device_list;
struct list_head sas_device_init_list;
spinlock_t sas_device_lock;
struct list_head pcie_device_list;
struct list_head pcie_device_init_list;
spinlock_t pcie_device_lock;

struct list_head raid_device_list;
spinlock_t raid_device_lock;
u8 io_missing_delay;
u16 device_missing_delay;
int sas_id;
int pcie_target_id;

void *blocking_handles;
void *pd_handles;
Expand Down
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