From: Matthew R. Ochs Date: Wed, 12 Apr 2017 19:13:50 +0000 (-0500) Subject: scsi: cxlflash: Support dynamic number of FC ports X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=78ae028e823701148e4915759459ee79597ea8ec;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git scsi: cxlflash: Support dynamic number of FC ports Transition from a static number of FC ports to a value that is derived during probe. For now, a static value is used but this will later be based on the type of card being configured. Signed-off-by: Matthew R. Ochs Signed-off-by: Uma Krishnan Signed-off-by: Martin K. Petersen --- diff --git a/drivers/scsi/cxlflash/common.h b/drivers/scsi/cxlflash/common.h index 3ff05f15b417..6a04867a0eec 100644 --- a/drivers/scsi/cxlflash/common.h +++ b/drivers/scsi/cxlflash/common.h @@ -25,7 +25,9 @@ extern const struct file_operations cxlflash_cxl_fops; -#define MAX_CONTEXT CXLFLASH_MAX_CONTEXT /* num contexts per afu */ +#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 CXLFLASH_BLOCK_SIZE 4096 /* 4K blocks */ #define CXLFLASH_MAX_XFER_SIZE 16777216 /* 16MB transfer */ @@ -98,6 +100,7 @@ struct cxlflash_cfg { struct pci_dev *dev; struct pci_device_id *dev_id; struct Scsi_Host *host; + int num_fc_ports; ulong cxlflash_regs_pci; @@ -118,7 +121,7 @@ struct cxlflash_cfg { struct file_operations cxl_fops; /* Parameters that are LUN table related */ - int last_lun_index[CXLFLASH_NUM_FC_PORTS]; + int last_lun_index[MAX_FC_PORTS]; int promote_lun_index; struct list_head lluns; /* list of llun_info structs */ diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c index 157d806c97fc..3f9c8690af0d 100644 --- a/drivers/scsi/cxlflash/main.c +++ b/drivers/scsi/cxlflash/main.c @@ -689,7 +689,7 @@ static void notify_shutdown(struct cxlflash_cfg *cfg, bool wait) global = &afu->afu_map->global; /* Notify AFU */ - for (i = 0; i < NUM_FC_PORTS; i++) { + for (i = 0; i < cfg->num_fc_ports; i++) { reg = readq_be(&global->fc_regs[i][FC_CONFIG2 / 8]); reg |= SISL_FC_SHUTDOWN_NORMAL; writeq_be(reg, &global->fc_regs[i][FC_CONFIG2 / 8]); @@ -699,7 +699,7 @@ static void notify_shutdown(struct cxlflash_cfg *cfg, bool wait) return; /* Wait up to 1.5 seconds for shutdown processing to complete */ - for (i = 0; i < NUM_FC_PORTS; i++) { + for (i = 0; i < cfg->num_fc_ports; i++) { retry_cnt = 0; while (true) { status = readq_be(&global->fc_regs[i][FC_STATUS / 8]); @@ -1072,6 +1072,7 @@ static const struct asyc_intr_info *find_ainfo(u64 status) */ static void afu_err_intr_init(struct afu *afu) { + struct cxlflash_cfg *cfg = afu->parent; int i; u64 reg; @@ -1107,7 +1108,7 @@ static void afu_err_intr_init(struct afu *afu) writeq_be(reg, &afu->afu_map->global.fc_regs[0][FC_CONFIG2 / 8]); /* now clear FC errors */ - for (i = 0; i < NUM_FC_PORTS; i++) { + for (i = 0; i < cfg->num_fc_ports; i++) { writeq_be(0xFFFFFFFFU, &afu->afu_map->global.fc_regs[i][FC_ERROR / 8]); writeq_be(0, &afu->afu_map->global.fc_regs[i][FC_ERRCAP / 8]); @@ -1394,7 +1395,7 @@ static int start_context(struct cxlflash_cfg *cfg) /** * read_vpd() - obtains the WWPNs from VPD * @cfg: Internal structure associated with the host. - * @wwpn: Array of size NUM_FC_PORTS to pass back WWPNs + * @wwpn: Array of size MAX_FC_PORTS to pass back WWPNs * * Return: 0 on success, -errno on failure */ @@ -1407,7 +1408,7 @@ static int read_vpd(struct cxlflash_cfg *cfg, u64 wwpn[]) ssize_t vpd_size; char vpd_data[CXLFLASH_VPD_LEN]; char tmp_buf[WWPN_BUF_LEN] = { 0 }; - char *wwpn_vpd_tags[NUM_FC_PORTS] = { "V5", "V6" }; + char *wwpn_vpd_tags[MAX_FC_PORTS] = { "V5", "V6" }; /* Get the VPD data from the device */ vpd_size = cxl_read_adapter_vpd(pdev, vpd_data, sizeof(vpd_data)); @@ -1445,7 +1446,7 @@ static int read_vpd(struct cxlflash_cfg *cfg, u64 wwpn[]) * because the conversion service requires that the ASCII * string be terminated. */ - for (k = 0; k < NUM_FC_PORTS; k++) { + for (k = 0; k < cfg->num_fc_ports; k++) { j = ro_size; i = ro_start + PCI_VPD_LRDT_TAG_SIZE; @@ -1474,6 +1475,8 @@ static int read_vpd(struct cxlflash_cfg *cfg, u64 wwpn[]) rc = -ENODEV; goto out; } + + dev_dbg(dev, "%s: wwpn%d=%016llx\n", __func__, k, wwpn[k]); } out: @@ -1520,7 +1523,7 @@ static int init_global(struct cxlflash_cfg *cfg) { struct afu *afu = cfg->afu; struct device *dev = &cfg->dev->dev; - u64 wwpn[NUM_FC_PORTS]; /* wwpn of AFU ports */ + u64 wwpn[MAX_FC_PORTS]; /* wwpn of AFU ports */ int i = 0, num_ports = 0; int rc = 0; u64 reg; @@ -1531,9 +1534,6 @@ static int init_global(struct cxlflash_cfg *cfg) goto out; } - dev_dbg(dev, "%s: wwpn0=%016llx wwpn1=%016llx\n", - __func__, wwpn[0], wwpn[1]); - /* Set up RRQ and SQ in AFU for master issued cmds */ writeq_be((u64) afu->hrrq_start, &afu->host_map->rrq_start); writeq_be((u64) afu->hrrq_end, &afu->host_map->rrq_end); @@ -1556,10 +1556,10 @@ static int init_global(struct cxlflash_cfg *cfg) if (afu->internal_lun) { /* Only use port 0 */ writeq_be(PORT0, &afu->afu_map->global.regs.afu_port_sel); - num_ports = NUM_FC_PORTS - 1; + num_ports = 0; } else { writeq_be(BOTH_PORTS, &afu->afu_map->global.regs.afu_port_sel); - num_ports = NUM_FC_PORTS; + num_ports = cfg->num_fc_ports; } for (i = 0; i < num_ports; i++) { @@ -2061,19 +2061,25 @@ static int cxlflash_change_queue_depth(struct scsi_device *sdev, int qdepth) * @cfg: Internal structure associated with the host. * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII. * - * Return: The size of the ASCII string returned in @buf. + * Return: The size of the ASCII string returned in @buf or -EINVAL. */ static ssize_t cxlflash_show_port_status(u32 port, struct cxlflash_cfg *cfg, char *buf) { + struct device *dev = &cfg->dev->dev; struct afu *afu = cfg->afu; char *disp_status; u64 status; __be64 __iomem *fc_regs; - if (port >= NUM_FC_PORTS) - return 0; + WARN_ON(port >= MAX_FC_PORTS); + + if (port >= cfg->num_fc_ports) { + dev_info(dev, "%s: Port %d not supported on this card.\n", + __func__, port); + return -EINVAL; + } fc_regs = &afu->afu_map->global.fc_regs[port][0]; status = readq_be(&fc_regs[FC_MTIP_STATUS / 8]); @@ -2178,12 +2184,13 @@ static ssize_t lun_mode_store(struct device *dev, /* * When configured for internal LUN, there is only one channel, - * channel number 0, else there will be 2 (default). + * channel number 0, else there will be one less than the number + * of fc ports for this card. */ if (afu->internal_lun) shost->max_channel = 0; else - shost->max_channel = NUM_FC_PORTS - 1; + shost->max_channel = cfg->num_fc_ports - 1; afu_reset(cfg); scsi_scan_host(cfg->host); @@ -2212,19 +2219,25 @@ static ssize_t ioctl_version_show(struct device *dev, * @cfg: Internal structure associated with the host. * @buf: Buffer of length PAGE_SIZE to report back port status in ASCII. * - * Return: The size of the ASCII string returned in @buf. + * Return: The size of the ASCII string returned in @buf or -EINVAL. */ static ssize_t cxlflash_show_port_lun_table(u32 port, struct cxlflash_cfg *cfg, char *buf) { + struct device *dev = &cfg->dev->dev; struct afu *afu = cfg->afu; int i; ssize_t bytes = 0; __be64 __iomem *fc_port; - if (port >= NUM_FC_PORTS) - return 0; + WARN_ON(port >= MAX_FC_PORTS); + + if (port >= cfg->num_fc_ports) { + dev_info(dev, "%s: Port %d not supported on this card.\n", + __func__, port); + return -EINVAL; + } fc_port = &afu->afu_map->global.fc_port[port][0]; @@ -2499,6 +2512,7 @@ static int cxlflash_probe(struct pci_dev *pdev, struct device *dev = &pdev->dev; struct dev_dependent_vals *ddv; int rc = 0; + int k; dev_dbg(&pdev->dev, "%s: Found CXLFLASH with IRQ: %d\n", __func__, pdev->irq); @@ -2531,17 +2545,20 @@ 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; /* - * The promoted LUNs move to the top of the LUN table. The rest stay - * on the bottom half. The bottom half grows from the end - * (index = 255), whereas the top half grows from the beginning - * (index = 0). + * Promoted LUNs move to the top of the LUN table. The rest stay on + * the bottom half. The bottom half grows from the end (index = 255), + * whereas the top half grows from the beginning (index = 0). + * + * Initialize the last LUN index for all possible ports. */ - cfg->promote_lun_index = 0; - cfg->last_lun_index[0] = CXLFLASH_NUM_VLUNS/2 - 1; - cfg->last_lun_index[1] = CXLFLASH_NUM_VLUNS/2 - 1; + cfg->promote_lun_index = 0; + + for (k = 0; k < MAX_FC_PORTS; k++) + cfg->last_lun_index[k] = CXLFLASH_NUM_VLUNS/2 - 1; cfg->dev_id = (struct pci_device_id *)dev_id; diff --git a/drivers/scsi/cxlflash/main.h b/drivers/scsi/cxlflash/main.h index 0be2261e6312..49657f1f409e 100644 --- a/drivers/scsi/cxlflash/main.h +++ b/drivers/scsi/cxlflash/main.h @@ -37,8 +37,6 @@ #define CXLFLASH_PCI_ERROR_RECOVERY_TIMEOUT (120 * HZ) -#define NUM_FC_PORTS CXLFLASH_NUM_FC_PORTS /* ports per AFU */ - /* FC defines */ #define FC_MTIP_CMDCONFIG 0x010 #define FC_MTIP_STATUS 0x018 diff --git a/drivers/scsi/cxlflash/sislite.h b/drivers/scsi/cxlflash/sislite.h index a6e48a893fef..0db4bc1f4e23 100644 --- a/drivers/scsi/cxlflash/sislite.h +++ b/drivers/scsi/cxlflash/sislite.h @@ -367,6 +367,7 @@ 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 diff --git a/drivers/scsi/cxlflash/superpipe.h b/drivers/scsi/cxlflash/superpipe.h index 9e62ff304e4b..690ce9c652b2 100644 --- a/drivers/scsi/cxlflash/superpipe.h +++ b/drivers/scsi/cxlflash/superpipe.h @@ -59,7 +59,7 @@ struct glun_info { /* Local (per-adapter) lun_info structure */ struct llun_info { - u64 lun_id[CXLFLASH_NUM_FC_PORTS]; /* from REPORT_LUNS */ + u64 lun_id[MAX_FC_PORTS]; /* from REPORT_LUNS */ u32 lun_index; /* Index in the LUN table */ u32 host_no; /* host_no from Scsi_host */ u32 port_sel; /* What port to use for this LUN */