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[SCSI] ipr: Add support for MSI-X and distributed completion 

The new generation IBM SAS Controllers will support MSI-X interrupts and
Distributed Completion Processing features. This patch add these support
in ipr device driver.

Signed-off-by: Wen Xiong <wenxiong@linux.vnet.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
wenxiong@linux.vnet.ibm.com 2013-01-11 17:43:50 -06:00 committed by James Bottomley
parent b3b3b4070d
commit 05a6538a9a
2 changed files with 593 additions and 191 deletions
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714
drivers/scsi/ipr.c
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File diff suppressed because it is too large Load Diff

70
drivers/scsi/ipr.h
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@ -303,6 +303,9 @@ IPR_PCII_NO_HOST_RRQ | IPR_PCII_IOARRIN_LOST | IPR_PCII_MMIO_ERROR)
* Misc literals
*/
#define IPR_NUM_IOADL_ENTRIES IPR_MAX_SGLIST
#define IPR_MAX_MSIX_VECTORS 0x5
#define IPR_MAX_HRRQ_NUM 0x10
#define IPR_INIT_HRRQ 0x0
/*
* Adapter interface types
@ -464,9 +467,36 @@ struct ipr_supported_device {
u8 reserved2[16];
}__attribute__((packed, aligned (4)));
struct ipr_hrr_queue {
struct ipr_ioa_cfg *ioa_cfg;
__be32 *host_rrq;
dma_addr_t host_rrq_dma;
#define IPR_HRRQ_REQ_RESP_HANDLE_MASK 0xfffffffc
#define IPR_HRRQ_RESP_BIT_SET 0x00000002
#define IPR_HRRQ_TOGGLE_BIT 0x00000001
#define IPR_HRRQ_REQ_RESP_HANDLE_SHIFT 2
#define IPR_ID_HRRQ_SELE_ENABLE 0x02
volatile __be32 *hrrq_start;
volatile __be32 *hrrq_end;
volatile __be32 *hrrq_curr;
struct list_head hrrq_free_q;
struct list_head hrrq_pending_q;
volatile u32 toggle_bit;
u32 size;
u32 min_cmd_id;
u32 max_cmd_id;
};
#define for_each_hrrq(hrrq, ioa_cfg) \
for (hrrq = (ioa_cfg)->hrrq; \
hrrq < ((ioa_cfg)->hrrq + (ioa_cfg)->hrrq_num); hrrq++)
/* Command packet structure */
struct ipr_cmd_pkt {
__be16 reserved; /* Reserved by IOA */
u8 reserved; /* Reserved by IOA */
u8 hrrq_id;
u8 request_type;
#define IPR_RQTYPE_SCSICDB 0x00
#define IPR_RQTYPE_IOACMD 0x01
@ -1322,6 +1352,7 @@ struct ipr_chip_t {
u16 intr_type;
#define IPR_USE_LSI 0x00
#define IPR_USE_MSI 0x01
#define IPR_USE_MSIX 0x02
u16 sis_type;
#define IPR_SIS32 0x00
#define IPR_SIS64 0x01
@ -1420,20 +1451,6 @@ struct ipr_ioa_cfg {
struct ipr_trace_entry *trace;
u32 trace_index:IPR_NUM_TRACE_INDEX_BITS;
/*
* Queue for free command blocks
*/
char ipr_free_label[8];
#define IPR_FREEQ_LABEL "free-q"
struct list_head free_q;
/*
* Queue for command blocks outstanding to the adapter
*/
char ipr_pending_label[8];
#define IPR_PENDQ_LABEL "pend-q"
struct list_head pending_q;
char cfg_table_start[8];
#define IPR_CFG_TBL_START "cfg"
union {
@ -1457,16 +1474,9 @@ struct ipr_ioa_cfg {
struct list_head hostrcb_free_q;
struct list_head hostrcb_pending_q;
__be32 *host_rrq;
dma_addr_t host_rrq_dma;
#define IPR_HRRQ_REQ_RESP_HANDLE_MASK 0xfffffffc
#define IPR_HRRQ_RESP_BIT_SET 0x00000002
#define IPR_HRRQ_TOGGLE_BIT 0x00000001
#define IPR_HRRQ_REQ_RESP_HANDLE_SHIFT 2
volatile __be32 *hrrq_start;
volatile __be32 *hrrq_end;
volatile __be32 *hrrq_curr;
volatile u32 toggle_bit;
struct ipr_hrr_queue hrrq[IPR_MAX_HRRQ_NUM];
u32 hrrq_num;
u32 hrrq_index;
struct ipr_bus_attributes bus_attr[IPR_MAX_NUM_BUSES];
@ -1512,6 +1522,15 @@ struct ipr_ioa_cfg {
u32 max_cmds;
struct ipr_cmnd **ipr_cmnd_list;
dma_addr_t *ipr_cmnd_list_dma;
u16 intr_flag;
unsigned int nvectors;
struct {
unsigned short vec;
char desc[22];
} vectors_info[IPR_MAX_MSIX_VECTORS];
}; /* struct ipr_ioa_cfg */
struct ipr_cmnd {
@ -1549,6 +1568,7 @@ struct ipr_cmnd {
struct scsi_device *sdev;
} u;
struct ipr_hrr_queue *hrrq;
struct ipr_ioa_cfg *ioa_cfg;
};