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scsi: cxlflash: SISlite updates to support 4 ports

Browse source 
Update the SISlite header to support 4 ports as outlined in the SISlite
specification. Address fallout from structure renames and refreshed
organization throughout the driver. Determine the number of ports supported by
a card from the global port selection mask register reset value.

Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Matthew R. Ochs 2017-04-12 14:14:28 -05:00 committed by Martin K. Petersen
parent 0aa14887c6
commit 5651807232
3 changed files with 140 additions and 56 deletions
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25
drivers/scsi/cxlflash/common.h
View file

@ -26,8 +26,11 @@
extern const struct file_operations cxlflash_cxl_fops;
#define MAX_CONTEXT CXLFLASH_MAX_CONTEXT /* num contexts per afu */
#define NUM_FC_PORTS CXLFLASH_NUM_FC_PORTS /* ports per AFU */
#define MAX_FC_PORTS CXLFLASH_MAX_FC_PORTS /* ports per AFU */
#define MAX_FC_PORTS CXLFLASH_MAX_FC_PORTS /* max ports per AFU */
#define LEGACY_FC_PORTS 2 /* legacy ports per AFU */
#define CHAN2PORTBANK(_x) ((_x) >> ilog2(CXLFLASH_NUM_FC_PORTS_PER_BANK))
#define CHAN2BANKPORT(_x) ((_x) & (CXLFLASH_NUM_FC_PORTS_PER_BANK - 1))
#define CHAN2PORTMASK(_x) (1 << (_x)) /* channel to port mask */
#define PORTMASK2CHAN(_x) (ilog2((_x))) /* port mask to channel */
@ -67,7 +70,7 @@ extern const struct file_operations cxlflash_cxl_fops;
static inline void check_sizes(void)
{
BUILD_BUG_ON_NOT_POWER_OF_2(CXLFLASH_NUM_CMDS);
BUILD_BUG_ON_NOT_POWER_OF_2(CXLFLASH_NUM_FC_PORTS_PER_BANK);
}
/* AFU defines a fixed size of 4K for command buffers (borrow 4K page define) */
@ -240,18 +243,26 @@ static inline u64 lun_to_lunid(u64 lun)
return be64_to_cpu(lun_id);
}
static inline __be64 __iomem *get_fc_port_regs(struct cxlflash_cfg *cfg, int i)
static inline struct fc_port_bank __iomem *get_fc_port_bank(
struct cxlflash_cfg *cfg, int i)
{
struct afu *afu = cfg->afu;
return &afu->afu_map->global.fc_regs[i][0];
return &afu->afu_map->global.bank[CHAN2PORTBANK(i)];
}
static inline __be64 __iomem *get_fc_port_regs(struct cxlflash_cfg *cfg, int i)
{
struct fc_port_bank __iomem *fcpb = get_fc_port_bank(cfg, i);
return &fcpb->fc_port_regs[CHAN2BANKPORT(i)][0];
}
static inline __be64 __iomem *get_fc_port_luns(struct cxlflash_cfg *cfg, int i)
{
struct afu *afu = cfg->afu;
struct fc_port_bank __iomem *fcpb = get_fc_port_bank(cfg, i);
return &afu->afu_map->global.fc_port[i][0];
return &fcpb->fc_port_luns[CHAN2BANKPORT(i)][0];
}
int cxlflash_afu_sync(struct afu *, ctx_hndl_t, res_hndl_t, u8);

77
drivers/scsi/cxlflash/main.c
View file

@ -1028,25 +1028,29 @@ static void afu_link_reset(struct afu *afu, int port, __be64 __iomem *fc_regs)
/*
* Asynchronous interrupt information table
*
* NOTE: The checkpatch script considers the BUILD_SISL_ASTATUS_FC_PORT macro
* as complex and complains because it is not wrapped with parentheses/braces.
*/
#define ASTATUS_FC(_a, _b, _c, _d) \
{ SISL_ASTATUS_FC##_a##_##_b, _c, _a, (_d) }
#define BUILD_SISL_ASTATUS_FC_PORT(_a) \
ASTATUS_FC(_a, OTHER, "other error", CLR_FC_ERROR | LINK_RESET), \
ASTATUS_FC(_a, LOGO, "target initiated LOGO", 0), \
ASTATUS_FC(_a, CRC_T, "CRC threshold exceeded", LINK_RESET), \
ASTATUS_FC(_a, LOGI_R, "login timed out, retrying", LINK_RESET), \
ASTATUS_FC(_a, LOGI_F, "login failed", CLR_FC_ERROR), \
ASTATUS_FC(_a, LOGI_S, "login succeeded", SCAN_HOST), \
ASTATUS_FC(_a, LINK_DN, "link down", 0), \
ASTATUS_FC(_a, LINK_UP, "link up", 0)
static const struct asyc_intr_info ainfo[] = {
{SISL_ASTATUS_FC0_OTHER, "other error", 0, CLR_FC_ERROR | LINK_RESET},
{SISL_ASTATUS_FC0_LOGO, "target initiated LOGO", 0, 0},
{SISL_ASTATUS_FC0_CRC_T, "CRC threshold exceeded", 0, LINK_RESET},
{SISL_ASTATUS_FC0_LOGI_R, "login timed out, retrying", 0, LINK_RESET},
{SISL_ASTATUS_FC0_LOGI_F, "login failed", 0, CLR_FC_ERROR},
{SISL_ASTATUS_FC0_LOGI_S, "login succeeded", 0, SCAN_HOST},
{SISL_ASTATUS_FC0_LINK_DN, "link down", 0, 0},
{SISL_ASTATUS_FC0_LINK_UP, "link up", 0, 0},
{SISL_ASTATUS_FC1_OTHER, "other error", 1, CLR_FC_ERROR | LINK_RESET},
{SISL_ASTATUS_FC1_LOGO, "target initiated LOGO", 1, 0},
{SISL_ASTATUS_FC1_CRC_T, "CRC threshold exceeded", 1, LINK_RESET},
{SISL_ASTATUS_FC1_LOGI_R, "login timed out, retrying", 1, LINK_RESET},
{SISL_ASTATUS_FC1_LOGI_F, "login failed", 1, CLR_FC_ERROR},
{SISL_ASTATUS_FC1_LOGI_S, "login succeeded", 1, SCAN_HOST},
{SISL_ASTATUS_FC1_LINK_DN, "link down", 1, 0},
{SISL_ASTATUS_FC1_LINK_UP, "link up", 1, 0},
{0x0, "", 0, 0} /* terminator */
BUILD_SISL_ASTATUS_FC_PORT(2),
BUILD_SISL_ASTATUS_FC_PORT(3),
BUILD_SISL_ASTATUS_FC_PORT(0),
BUILD_SISL_ASTATUS_FC_PORT(1),
{ 0x0, "", 0, 0 }
};
/**
@ -1059,6 +1063,8 @@ static const struct asyc_intr_info *find_ainfo(u64 status)
{
const struct asyc_intr_info *info;
BUILD_BUG_ON(ainfo[ARRAY_SIZE(ainfo) - 1].status != 0);
for (info = &ainfo[0]; info->status; info++)
if (info->status == status)
return info;
@ -1746,6 +1752,39 @@ static int init_mc(struct cxlflash_cfg *cfg)
goto ret;
}
/**
* get_num_afu_ports() - determines and configures the number of AFU ports
* @cfg: Internal structure associated with the host.
*
* This routine determines the number of AFU ports by converting the global
* port selection mask. The converted value is only valid following an AFU
* reset (explicit or power-on). This routine must be invoked shortly after
* mapping as other routines are dependent on the number of ports during the
* initialization sequence.
*
* To support legacy AFUs that might not have reflected an initial global
* port mask (value read is 0), default to the number of ports originally
* supported by the cxlflash driver (2) before hardware with other port
* offerings was introduced.
*/
static void get_num_afu_ports(struct cxlflash_cfg *cfg)
{
struct afu *afu = cfg->afu;
struct device *dev = &cfg->dev->dev;
u64 port_mask;
int num_fc_ports = LEGACY_FC_PORTS;
port_mask = readq_be(&afu->afu_map->global.regs.afu_port_sel);
if (port_mask != 0ULL)
num_fc_ports = min(ilog2(port_mask) + 1, MAX_FC_PORTS);
dev_dbg(dev, "%s: port_mask=%016llx num_fc_ports=%d\n",
__func__, port_mask, num_fc_ports);
cfg->num_fc_ports = num_fc_ports;
cfg->host->max_channel = PORTNUM2CHAN(num_fc_ports);
}
/**
* init_afu() - setup as master context and start AFU
* @cfg: Internal structure associated with the host.
@ -1803,6 +1842,8 @@ static int init_afu(struct cxlflash_cfg *cfg)
dev_dbg(dev, "%s: afu_ver=%s interface_ver=%016llx\n", __func__,
afu->version, afu->interface_version);
get_num_afu_ports(cfg);
rc = start_afu(cfg);
if (rc) {
dev_err(dev, "%s: start_afu failed, rc=%d\n", __func__, rc);
@ -2534,7 +2575,6 @@ static int cxlflash_probe(struct pci_dev *pdev,
host->max_id = CXLFLASH_MAX_NUM_TARGETS_PER_BUS;
host->max_lun = CXLFLASH_MAX_NUM_LUNS_PER_TARGET;
host->max_channel = PORTNUM2CHAN(NUM_FC_PORTS);
host->unique_id = host->host_no;
host->max_cmd_len = CXLFLASH_MAX_CDB_LEN;
@ -2550,7 +2590,6 @@ static int cxlflash_probe(struct pci_dev *pdev,
cfg->init_state = INIT_STATE_NONE;
cfg->dev = pdev;
cfg->num_fc_ports = NUM_FC_PORTS;
cfg->cxl_fops = cxlflash_cxl_fops;
/*

94
drivers/scsi/cxlflash/sislite.h
View file

@ -292,28 +292,54 @@ struct sisl_ctrl_map {
/* single copy global regs */
struct sisl_global_regs {
__be64 aintr_status;
/* In cxlflash, each FC port/link gets a byte of status */
#define SISL_ASTATUS_FC0_OTHER 0x8000ULL /* b48, other err,
FC_ERRCAP[31:20] */
#define SISL_ASTATUS_FC0_LOGO 0x4000ULL /* b49, target sent FLOGI/PLOGI/LOGO
while logged in */
#define SISL_ASTATUS_FC0_CRC_T 0x2000ULL /* b50, CRC threshold exceeded */
#define SISL_ASTATUS_FC0_LOGI_R 0x1000ULL /* b51, login state machine timed out
and retrying */
#define SISL_ASTATUS_FC0_LOGI_F 0x0800ULL /* b52, login failed,
FC_ERROR[19:0] */
#define SISL_ASTATUS_FC0_LOGI_S 0x0400ULL /* b53, login succeeded */
#define SISL_ASTATUS_FC0_LINK_DN 0x0200ULL /* b54, link online to offline */
#define SISL_ASTATUS_FC0_LINK_UP 0x0100ULL /* b55, link offline to online */
/*
* In cxlflash, FC port/link are arranged in port pairs, each
* gets a byte of status:
*
* *_OTHER: other err, FC_ERRCAP[31:20]
* *_LOGO: target sent FLOGI/PLOGI/LOGO while logged in
* *_CRC_T: CRC threshold exceeded
* *_LOGI_R: login state machine timed out and retrying
* *_LOGI_F: login failed, FC_ERROR[19:0]
* *_LOGI_S: login succeeded
* *_LINK_DN: link online to offline
* *_LINK_UP: link offline to online
*/
#define SISL_ASTATUS_FC2_OTHER 0x80000000ULL /* b32 */
#define SISL_ASTATUS_FC2_LOGO 0x40000000ULL /* b33 */
#define SISL_ASTATUS_FC2_CRC_T 0x20000000ULL /* b34 */
#define SISL_ASTATUS_FC2_LOGI_R 0x10000000ULL /* b35 */
#define SISL_ASTATUS_FC2_LOGI_F 0x08000000ULL /* b36 */
#define SISL_ASTATUS_FC2_LOGI_S 0x04000000ULL /* b37 */
#define SISL_ASTATUS_FC2_LINK_DN 0x02000000ULL /* b38 */
#define SISL_ASTATUS_FC2_LINK_UP 0x01000000ULL /* b39 */
#define SISL_ASTATUS_FC1_OTHER 0x0080ULL /* b56 */
#define SISL_ASTATUS_FC1_LOGO 0x0040ULL /* b57 */
#define SISL_ASTATUS_FC1_CRC_T 0x0020ULL /* b58 */
#define SISL_ASTATUS_FC1_LOGI_R 0x0010ULL /* b59 */
#define SISL_ASTATUS_FC1_LOGI_F 0x0008ULL /* b60 */
#define SISL_ASTATUS_FC1_LOGI_S 0x0004ULL /* b61 */
#define SISL_ASTATUS_FC1_LINK_DN 0x0002ULL /* b62 */
#define SISL_ASTATUS_FC1_LINK_UP 0x0001ULL /* b63 */
#define SISL_ASTATUS_FC3_OTHER 0x00800000ULL /* b40 */
#define SISL_ASTATUS_FC3_LOGO 0x00400000ULL /* b41 */
#define SISL_ASTATUS_FC3_CRC_T 0x00200000ULL /* b42 */
#define SISL_ASTATUS_FC3_LOGI_R 0x00100000ULL /* b43 */
#define SISL_ASTATUS_FC3_LOGI_F 0x00080000ULL /* b44 */
#define SISL_ASTATUS_FC3_LOGI_S 0x00040000ULL /* b45 */
#define SISL_ASTATUS_FC3_LINK_DN 0x00020000ULL /* b46 */
#define SISL_ASTATUS_FC3_LINK_UP 0x00010000ULL /* b47 */
#define SISL_ASTATUS_FC0_OTHER 0x00008000ULL /* b48 */
#define SISL_ASTATUS_FC0_LOGO 0x00004000ULL /* b49 */
#define SISL_ASTATUS_FC0_CRC_T 0x00002000ULL /* b50 */
#define SISL_ASTATUS_FC0_LOGI_R 0x00001000ULL /* b51 */
#define SISL_ASTATUS_FC0_LOGI_F 0x00000800ULL /* b52 */
#define SISL_ASTATUS_FC0_LOGI_S 0x00000400ULL /* b53 */
#define SISL_ASTATUS_FC0_LINK_DN 0x00000200ULL /* b54 */
#define SISL_ASTATUS_FC0_LINK_UP 0x00000100ULL /* b55 */
#define SISL_ASTATUS_FC1_OTHER 0x00000080ULL /* b56 */
#define SISL_ASTATUS_FC1_LOGO 0x00000040ULL /* b57 */
#define SISL_ASTATUS_FC1_CRC_T 0x00000020ULL /* b58 */
#define SISL_ASTATUS_FC1_LOGI_R 0x00000010ULL /* b59 */
#define SISL_ASTATUS_FC1_LOGI_F 0x00000008ULL /* b60 */
#define SISL_ASTATUS_FC1_LOGI_S 0x00000004ULL /* b61 */
#define SISL_ASTATUS_FC1_LINK_DN 0x00000002ULL /* b62 */
#define SISL_ASTATUS_FC1_LINK_UP 0x00000001ULL /* b63 */
#define SISL_FC_INTERNAL_UNMASK 0x0000000300000000ULL /* 1 means unmasked */
#define SISL_FC_INTERNAL_MASK ~(SISL_FC_INTERNAL_UNMASK)
@ -325,7 +351,7 @@ struct sisl_global_regs {
#define SISL_STATUS_SHUTDOWN_ACTIVE 0x0000000000000010ULL
#define SISL_STATUS_SHUTDOWN_COMPLETE 0x0000000000000020ULL
#define SISL_ASTATUS_UNMASK 0xFFFFULL /* 1 means unmasked */
#define SISL_ASTATUS_UNMASK 0xFFFFFFFFULL /* 1 means unmasked */
#define SISL_ASTATUS_MASK ~(SISL_ASTATUS_UNMASK) /* 1 means masked */
__be64 aintr_clear;
@ -367,10 +393,18 @@ struct sisl_global_regs {
#define SISL_INTVER_CAP_RESERVED_CMD_MODE_B 0x100000000000ULL
};
#define CXLFLASH_MAX_FC_PORTS 2
#define CXLFLASH_NUM_FC_PORTS 2
#define CXLFLASH_MAX_CONTEXT 512 /* how many contexts per afu */
#define CXLFLASH_NUM_VLUNS 512
#define CXLFLASH_NUM_FC_PORTS_PER_BANK 2 /* fixed # of ports per bank */
#define CXLFLASH_MAX_FC_BANKS 1 /* max # of banks supported */
#define CXLFLASH_MAX_FC_PORTS (CXLFLASH_NUM_FC_PORTS_PER_BANK * \
CXLFLASH_MAX_FC_BANKS)
#define CXLFLASH_MAX_CONTEXT 512 /* number of contexts per AFU */
#define CXLFLASH_NUM_VLUNS 512 /* number of vluns per AFU/port */
#define CXLFLASH_NUM_REGS 512 /* number of registers per port */
struct fc_port_bank {
__be64 fc_port_regs[CXLFLASH_NUM_FC_PORTS_PER_BANK][CXLFLASH_NUM_REGS];
__be64 fc_port_luns[CXLFLASH_NUM_FC_PORTS_PER_BANK][CXLFLASH_NUM_VLUNS];
};
struct sisl_global_map {
union {
@ -380,11 +414,9 @@ struct sisl_global_map {
char page1[SIZE_4K]; /* page 1 */
/* pages 2 & 3 */
__be64 fc_regs[CXLFLASH_NUM_FC_PORTS][CXLFLASH_NUM_VLUNS];
struct fc_port_bank bank[CXLFLASH_MAX_FC_BANKS]; /* pages 2 - 5 */
/* pages 4 & 5 (lun tbl) */
__be64 fc_port[CXLFLASH_NUM_FC_PORTS][CXLFLASH_NUM_VLUNS];
/* pages 6 - 15 are reserved */
};
@ -479,6 +511,8 @@ struct sisl_rht_entry_f1 {
#define PORT0 0x01U
#define PORT1 0x02U
#define PORT2 0x04U
#define PORT3 0x08U
#define PORT_MASK(_n) ((1 << (_n)) - 1)
/* AFU Sync Mode byte */