[RFC] convert fusion to SPI transport class and use generic DV

[James Bottomley <James.Bottomley@SteelEye.com>]

This code is more posted as an illustration of how to do things than an
actual patch for submission.  However, I've tested this and it does
actually work:

ioc1: 53C1030: Capabilities={Initiator,Target}
scsi5 : ioc1: LSI53C1030, FwRev=01032700h, Ports=1, MaxQ=255, IRQ=56
  Vendor: HP 36.4G  Model: ST336607LW        Rev: HPC3
  Type:   Direct-Access                      ANSI SCSI revision: 03
 target5:0:1: Beginning Domain Validation
 target5:0:1: Ending Domain Validation
 target5:0:1: FAST-160 WIDE SCSI 320.0 MB/s DT IU QAS (6.25 ns, offset 127)

jejb@titanic> ls /sys/class/spi_transport/target5\:0\:1/
device@  iu          max_width   offset    period  rd_strm     rti    wr_flow
dt       max_offset  min_period  pcomp_en  qas     revalidate  width

James

--- a/drivers/message/fusion/Kconfig
+++ b/drivers/message/fusion/Kconfig
@@ -9,6 +9,7 @@ config FUSION_SPI
 	tristate "Fusion MPT ScsiHost drivers for SPI"
 	depends on PCI && SCSI
 	select FUSION
+	select SCSI_SPI_ATTRS
 	---help---
 	  SCSI HOST support for a parallel SCSI host adapters.
 
--- a/drivers/message/fusion/mptscsih.c
+++ b/drivers/message/fusion/mptscsih.c
@@ -2507,7 +2507,7 @@ mptscsih_ioc_reset(MPT_ADAPTER *ioc, int
 		/* 4. Renegotiate to all devices, if SCSI
 		 */
 		if (ioc->bus_type == SCSI) {
-			dnegoprintk(("writeSDP1: ALL_IDS USE_NVRAM\n"));
+			printk("writeSDP1: ALL_IDS USE_NVRAM\n");
 			mptscsih_writeSDP1(hd, 0, 0, MPT_SCSICFG_ALL_IDS | MPT_SCSICFG_USE_NVRAM);
 		}
 
@@ -2766,7 +2766,7 @@ mptscsih_initTarget(MPT_SCSI_HOST *hd, i
 					vdev->tflags |= MPT_TARGET_FLAGS_VALID_56;
 				}
 			}
-			mptscsih_setTargetNegoParms(hd, vdev, data_56);
+			//mptscsih_setTargetNegoParms(hd, vdev, data_56);
 		} else {
 			/* Initial Inquiry may not request enough data bytes to
 			 * obtain byte 57.  DV will; if target doesn't return
@@ -2777,7 +2777,7 @@ mptscsih_initTarget(MPT_SCSI_HOST *hd, i
 				 */
 					data_56 = data[56];
 					vdev->tflags |= MPT_TARGET_FLAGS_VALID_56;
-					mptscsih_setTargetNegoParms(hd, vdev, data_56);
+					//mptscsih_setTargetNegoParms(hd, vdev, data_56);
 				}
 			}
 		}
@@ -2806,6 +2806,8 @@ mptscsih_setTargetNegoParms(MPT_SCSI_HOS
 
 	target->negoFlags = pspi_data->noQas;
 
+	printk("HERE\n");
+
 	/* noQas == 0 => device supports QAS. Need byte 56 of Inq to determine
 	 * support. If available, default QAS to off and allow enabling.
 	 * If not available, default QAS to on, turn off for non-disks.
@@ -3105,6 +3107,8 @@ mptscsih_writeSDP1(MPT_SCSI_HOST *hd, in
 	u8			 negoFlags;
 	u8			 maxwidth, maxoffset, maxfactor;
 
+	printk("HERE2\n");
+
 	if (ioc->spi_data.sdp1length == 0)
 		return 0;
 
@@ -3204,8 +3208,8 @@ mptscsih_writeSDP1(MPT_SCSI_HOST *hd, in
 			return -EAGAIN;
 		}
 
-		ddvprintk((MYIOC_s_INFO_FMT "WriteSDP1 (mf=%p, id=%d, req=0x%x, cfg=0x%x)\n",
-			hd->ioc->name, mf, id, requested, configuration));
+		printk(MYIOC_s_INFO_FMT "WriteSDP1 (mf=%p, id=%d, req=0x%x, cfg=0x%x)\n",
+			hd->ioc->name, mf, id, requested, configuration);
 
 
 		/* Set the request and the data pointers.
@@ -4228,12 +4232,12 @@ mptscsih_qas_check(MPT_SCSI_HOST *hd, in
 		if ((pTarget != NULL) && (!pTarget->raidVolume)) {
 			if ((pTarget->negoFlags & hd->ioc->spi_data.noQas) == 0) {
 				pTarget->negoFlags |= hd->ioc->spi_data.noQas;
-				dnegoprintk(("writeSDP1: id=%d flags=0\n", id));
+				printk("writeSDP1: id=%d flags=0\n", id);
 				mptscsih_writeSDP1(hd, 0, ii, 0);
 			}
 		} else {
 			if (mptscsih_is_phys_disk(hd->ioc, ii) == 1) {
-				dnegoprintk(("writeSDP1: id=%d SCSICFG_USE_NVRAM\n", id));
+				printk("writeSDP1: id=%d SCSICFG_USE_NVRAM\n", id);
 				mptscsih_writeSDP1(hd, 0, ii, MPT_SCSICFG_USE_NVRAM);
 			}
 		}
--- a/drivers/message/fusion/mptscsih.h
+++ b/drivers/message/fusion/mptscsih.h
@@ -67,7 +67,7 @@
  * capabilities.
  */
 
-#define MPTSCSIH_ENABLE_DOMAIN_VALIDATION
+#undef MPTSCSIH_ENABLE_DOMAIN_VALIDATION
 
 
 /* SCSI driver setup structure. Settings can be overridden
--- a/drivers/message/fusion/mptspi.c
+++ b/drivers/message/fusion/mptspi.c
@@ -62,6 +62,8 @@
 #include <scsi/scsi_device.h>
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_tcq.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_spi.h>
 
 #include "mptbase.h"
 #include "mptscsih.h"
@@ -98,6 +100,8 @@ static int mpt_pq_filter = 0;
 module_param(mpt_pq_filter, int, 0);
 MODULE_PARM_DESC(mpt_pq_filter, " Enable peripheral qualifier filter: enable=1  (default=0)");
 
+static struct scsi_transport_template *mptspi_transport_template = NULL;
+
 static int	mptspiDoneCtx = -1;
 static int	mptspiTaskCtx = -1;
 static int	mptspiInternalCtx = -1; /* Used only for internal commands */
@@ -115,6 +119,48 @@ static struct device_attribute *mptspi_d
 	NULL,
 };
 
+static int mptspi_target_alloc(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
+	struct _MPT_SCSI_HOST *hd = (struct _MPT_SCSI_HOST *)shost->hostdata;
+	static void mptspi_write_offset(struct scsi_target *, int);
+	static void mptspi_write_width(struct scsi_target *, int);
+
+	if (hd == NULL)
+		return -ENODEV;
+
+	if (hd->ioc->spi_data.nvram &&
+	    hd->ioc->spi_data.nvram[starget->id] != MPT_HOST_NVRAM_INVALID) {
+		u32 nvram = hd->ioc->spi_data.nvram[starget->id];
+		spi_min_period(starget) = (nvram & MPT_NVRAM_SYNC_MASK) >> MPT_NVRAM_SYNC_SHIFT;
+		spi_max_width(starget) = nvram & MPT_NVRAM_WIDE_DISABLE ? 0 : 1;
+	} else {
+		spi_min_period(starget) = hd->ioc->spi_data.minSyncFactor;
+		spi_max_width(starget) = hd->ioc->spi_data.maxBusWidth;
+	}
+	spi_max_offset(starget) = hd->ioc->spi_data.maxSyncOffset;
+
+	spi_offset(starget) = 0;
+	mptspi_write_width(starget, 0);
+
+	return 0;
+}
+
+static int mptspi_slave_configure(struct scsi_device *sdev)
+{
+	int ret = mptscsih_slave_configure(sdev);
+
+	if (ret)
+		return ret;
+
+	if (!spi_initial_dv(sdev->sdev_target)) {
+		spi_dv_device(sdev);
+		spi_display_xfer_agreement(sdev->sdev_target);
+	}
+
+	return 0;
+}
+
 static struct scsi_host_template mptspi_driver_template = {
 	.proc_name			= "mptspi",
 	.proc_info			= mptscsih_proc_info,
@@ -122,8 +168,9 @@ static struct scsi_host_template mptspi_
 	.info				= mptscsih_info,
 	.queuecommand			= mptscsih_qcmd,
 	.slave_alloc			= mptscsih_slave_alloc,
-	.slave_configure		= mptscsih_slave_configure,
+	.slave_configure		= mptspi_slave_configure,
 	.slave_destroy			= mptscsih_slave_destroy,
+	.target_alloc			= mptspi_target_alloc,
 	.eh_abort_handler		= mptscsih_abort,
 	.eh_device_reset_handler	= mptscsih_dev_reset,
 	.eh_bus_reset_handler		= mptscsih_bus_reset,
@@ -138,6 +185,325 @@ static struct scsi_host_template mptspi_
 	.sdev_attrs			= mptspi_dev_attrs,
 };
 
+static int mptspi_read_page0(struct scsi_target *starget,
+			     struct _CONFIG_PAGE_SCSI_DEVICE_0 *pass_pg0)
+{
+	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
+	struct _MPT_SCSI_HOST *hd = (struct _MPT_SCSI_HOST *)shost->hostdata;
+	struct _MPT_ADAPTER *ioc = hd->ioc;
+	struct _CONFIG_PAGE_SCSI_DEVICE_0 *pg0;
+	dma_addr_t pg0_dma;
+	int size;
+	struct _x_config_parms cfg;
+	struct _CONFIG_PAGE_HEADER hdr;
+	int err = -EBUSY;
+
+	size = ioc->spi_data.sdp0length * 4;
+	/*
+	if (ioc->spi_data.sdp0length & 1)
+		size += size + 4;
+	size += 2048;
+	*/
+
+	pg0 = dma_alloc_coherent(&ioc->pcidev->dev, size, &pg0_dma, GFP_KERNEL);
+	if (pg0 == NULL) {
+		dev_printk(KERN_ERR, &starget->dev, "dma_alloc_coherent for parameters failed\n");
+		return -EINVAL;
+	}
+
+	memset(&hdr, 0, sizeof(hdr));
+
+	hdr.PageVersion = ioc->spi_data.sdp0version;
+	hdr.PageLength = ioc->spi_data.sdp0length;
+	hdr.PageNumber = 0;
+	hdr.PageType = MPI_CONFIG_PAGETYPE_SCSI_DEVICE;
+
+	memset(&cfg, 0, sizeof(cfg));
+
+	cfg.hdr = &hdr;
+	cfg.physAddr = pg0_dma;
+	cfg.action = MPI_CONFIG_ACTION_PAGE_READ_CURRENT;
+	cfg.dir = 0;
+	cfg.pageAddr = (starget->channel << 8) | starget->id;
+
+	if (mpt_config(ioc, &cfg)) {
+		dev_printk(KERN_ERR, &starget->dev, "mpt_config failed\n");
+		goto out_free;
+	}
+	err = 0;
+	memcpy(pass_pg0, pg0, size);
+
+ out_free:
+	dma_free_coherent(&ioc->pcidev->dev, size, pg0, pg0_dma);
+	return err;
+}
+
+static void mptspi_read_parameters(struct scsi_target *starget)
+{
+	int nego;
+	struct _CONFIG_PAGE_SCSI_DEVICE_0 pg0;
+
+	mptspi_read_page0(starget, &pg0);
+
+	nego = le32_to_cpu(pg0.NegotiatedParameters);
+
+	spi_iu(starget) = (nego & MPI_SCSIDEVPAGE0_NP_IU) ? 1 : 0;
+	spi_dt(starget) = (nego & MPI_SCSIDEVPAGE0_NP_DT) ? 1 : 0;
+	spi_qas(starget) = (nego & MPI_SCSIDEVPAGE0_NP_QAS) ? 1 : 0;
+	//spi_hold_mcs(starget) = (nego & MPI_SCSIDEVPAGE0_NP_HOLD_MCS) ? 1 : 0;
+	spi_wr_flow(starget) = (nego & MPI_SCSIDEVPAGE0_NP_WR_FLOW) ? 1 : 0;
+	spi_rd_strm(starget) = (nego & MPI_SCSIDEVPAGE0_NP_RD_STRM) ? 1 : 0;
+	spi_rti(starget) = (nego & MPI_SCSIDEVPAGE0_NP_RTI) ? 1 : 0;
+	spi_pcomp_en(starget) = (nego & MPI_SCSIDEVPAGE0_NP_PCOMP_EN) ? 1 : 0;
+	spi_period(starget) = (nego & MPI_SCSIDEVPAGE0_NP_NEG_SYNC_PERIOD_MASK) >> MPI_SCSIDEVPAGE0_NP_SHIFT_SYNC_PERIOD;
+	spi_offset(starget) = (nego & MPI_SCSIDEVPAGE0_NP_NEG_SYNC_OFFSET_MASK) >> MPI_SCSIDEVPAGE0_NP_SHIFT_SYNC_OFFSET;
+	spi_width(starget) = (nego & MPI_SCSIDEVPAGE0_NP_WIDE) ? 1 : 0;
+}
+
+static int mptspi_write_page1(struct scsi_target *starget,
+			       struct _CONFIG_PAGE_SCSI_DEVICE_1 *pass_pg1)
+{
+	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
+	struct _MPT_SCSI_HOST *hd = (struct _MPT_SCSI_HOST *)shost->hostdata;
+	struct _MPT_ADAPTER *ioc = hd->ioc;
+	struct _CONFIG_PAGE_SCSI_DEVICE_1 *pg1;
+	dma_addr_t pg1_dma;
+	int size;
+	struct _x_config_parms cfg;
+	struct _CONFIG_PAGE_HEADER hdr;
+	int err = -EBUSY;
+
+	size = ioc->spi_data.sdp1length * 4;
+
+	pg1 = dma_alloc_coherent(&ioc->pcidev->dev, size, &pg1_dma, GFP_KERNEL);
+	if (pg1 == NULL) {
+		dev_printk(KERN_ERR, &starget->dev, "dma_alloc_coherent for parameters failed\n");
+		return -EINVAL;
+	}
+
+	memset(&hdr, 0, sizeof(hdr));
+
+	hdr.PageVersion = ioc->spi_data.sdp1version;
+	hdr.PageLength = ioc->spi_data.sdp1length;
+	hdr.PageNumber = 1;
+	hdr.PageType = MPI_CONFIG_PAGETYPE_SCSI_DEVICE;
+
+	memset(&cfg, 0, sizeof(cfg));
+
+	cfg.hdr = &hdr;
+	cfg.physAddr = pg1_dma;
+	cfg.action = MPI_CONFIG_ACTION_PAGE_WRITE_CURRENT;
+	cfg.dir = 1;
+	cfg.pageAddr = (starget->channel << 8) | starget->id;
+
+	memcpy(pg1, pass_pg1, size);
+
+	pg1->Header.PageVersion = hdr.PageVersion;
+	pg1->Header.PageLength = hdr.PageLength;
+	pg1->Header.PageNumber = hdr.PageNumber;
+	pg1->Header.PageType = hdr.PageType;
+
+	if (mpt_config(ioc, &cfg)) {
+		dev_printk(KERN_ERR, &starget->dev, "mpt_config failed\n");
+		goto out_free;
+	}
+	err = 0;
+
+ out_free:
+	dma_free_coherent(&ioc->pcidev->dev, size, pg1, pg1_dma);
+	return err;
+}
+
+static u32 mptspi_getRP(struct scsi_target *starget)
+{
+	u32 nego = 0;
+
+	nego |= spi_iu(starget) ? MPI_SCSIDEVPAGE1_RP_IU : 0;
+	nego |= spi_dt(starget) ? MPI_SCSIDEVPAGE1_RP_DT : 0;
+	nego |= spi_qas(starget) ? MPI_SCSIDEVPAGE1_RP_QAS : 0;
+	//nego |= spi_hold_mcs(starget) ? MPI_SCSIDEVPAGE1_RP_HOLD_MCS : 0;
+	nego |= spi_wr_flow(starget) ? MPI_SCSIDEVPAGE1_RP_WR_FLOW : 0;
+	nego |= spi_rd_strm(starget) ? MPI_SCSIDEVPAGE1_RP_RD_STRM : 0;
+	nego |= spi_rti(starget) ? MPI_SCSIDEVPAGE1_RP_RTI : 0;
+	nego |= spi_pcomp_en(starget) ? MPI_SCSIDEVPAGE1_RP_PCOMP_EN : 0;
+
+	nego |= (spi_period(starget) <<  MPI_SCSIDEVPAGE1_RP_SHIFT_MIN_SYNC_PERIOD) & MPI_SCSIDEVPAGE1_RP_MIN_SYNC_PERIOD_MASK;
+	nego |= (spi_offset(starget) << MPI_SCSIDEVPAGE1_RP_SHIFT_MAX_SYNC_OFFSET) & MPI_SCSIDEVPAGE1_RP_MAX_SYNC_OFFSET_MASK;
+	nego |= spi_width(starget) ?  MPI_SCSIDEVPAGE1_RP_WIDE : 0;
+
+	return nego;
+}
+
+static void mptspi_write_offset(struct scsi_target *starget, int offset)
+{
+	struct _CONFIG_PAGE_SCSI_DEVICE_1 pg1;
+	u32 nego;
+
+	if (offset < 0)
+		offset = 0;
+
+	if (offset > 255)
+		offset = 255;
+
+	if (spi_offset(starget) == -1)
+		mptspi_read_parameters(starget);
+
+	spi_offset(starget) = offset;
+
+	nego = mptspi_getRP(starget);
+
+	pg1.RequestedParameters = cpu_to_le32(nego);
+	pg1.Reserved = 0;
+	pg1.Configuration = 0;
+
+	mptspi_write_page1(starget, &pg1);
+}
+
+static void mptspi_write_period(struct scsi_target *starget, int period)
+{
+	struct _CONFIG_PAGE_SCSI_DEVICE_1 pg1;
+	u32 nego;
+
+	if (period < 8)
+		period = 8;
+
+	if (period > 255)
+		period = 255;
+
+	if (spi_period(starget) == -1)
+		mptspi_read_parameters(starget);
+
+	if (period == 8) {
+		spi_iu(starget) = 1;
+		spi_dt(starget) = 1;
+	} else if (period == 9) {
+		spi_dt(starget) = 1;
+	}
+
+	spi_period(starget) = period;
+
+	nego = mptspi_getRP(starget);
+
+	pg1.RequestedParameters = cpu_to_le32(nego);
+	pg1.Reserved = 0;
+	pg1.Configuration = 0;
+
+	mptspi_write_page1(starget, &pg1);
+}
+
+static void mptspi_write_dt(struct scsi_target *starget, int dt)
+{
+	struct _CONFIG_PAGE_SCSI_DEVICE_1 pg1;
+	u32 nego;
+
+	if (spi_period(starget) == -1)
+		mptspi_read_parameters(starget);
+
+	if (!dt && spi_period(starget) < 10)
+		spi_period(starget) = 10;
+
+	spi_dt(starget) = dt;
+
+	nego = mptspi_getRP(starget);
+
+	
+	pg1.RequestedParameters = cpu_to_le32(nego);
+	pg1.Reserved = 0;
+	pg1.Configuration = 0;
+
+	mptspi_write_page1(starget, &pg1);
+}
+
+static void mptspi_write_iu(struct scsi_target *starget, int iu)
+{
+	struct _CONFIG_PAGE_SCSI_DEVICE_1 pg1;
+	u32 nego;
+
+	if (spi_period(starget) == -1)
+		mptspi_read_parameters(starget);
+
+	if (!iu && spi_period(starget) < 9)
+		spi_period(starget) = 9;
+
+	spi_iu(starget) = iu;
+
+	nego = mptspi_getRP(starget);
+
+	
+	pg1.RequestedParameters = cpu_to_le32(nego);
+	pg1.Reserved = 0;
+	pg1.Configuration = 0;
+
+	mptspi_write_page1(starget, &pg1);
+}
+
+static void mptspi_write_qas(struct scsi_target *starget, int qas)
+{
+	struct _CONFIG_PAGE_SCSI_DEVICE_1 pg1;
+	u32 nego;
+
+	spi_qas(starget) = qas;
+
+	nego = mptspi_getRP(starget);
+	
+	pg1.RequestedParameters = cpu_to_le32(nego);
+	pg1.Reserved = 0;
+	pg1.Configuration = 0;
+
+	mptspi_write_page1(starget, &pg1);
+}
+
+static void mptspi_write_width(struct scsi_target *starget, int width)
+{
+	struct _CONFIG_PAGE_SCSI_DEVICE_1 pg1;
+	u32 nego;
+
+	if (!width) {
+		spi_dt(starget) = 0;
+		if (spi_period(starget) < 10)
+			spi_period(starget) = 10;
+	}
+
+	spi_width(starget) = width;
+
+	nego = mptspi_getRP(starget);
+	
+	pg1.RequestedParameters = cpu_to_le32(nego);
+	pg1.Reserved = 0;
+	pg1.Configuration = 0;
+
+	mptspi_write_page1(starget, &pg1);
+}
+
+static struct spi_function_template mptspi_transport_functions = {
+	.get_offset	= mptspi_read_parameters,
+	.set_offset	= mptspi_write_offset,
+	.show_offset	= 1,
+	.get_period	= mptspi_read_parameters,
+	.set_period	= mptspi_write_period,
+	.show_period	= 1,
+	.get_width	= mptspi_read_parameters,
+	.set_width	= mptspi_write_width,
+	.show_width	= 1,
+	.get_iu		= mptspi_read_parameters,
+	.set_iu		= mptspi_write_iu,
+	.show_iu	= 1,
+	.get_dt		= mptspi_read_parameters,
+	.set_dt		= mptspi_write_dt,
+	.show_dt	= 1,
+	.get_qas	= mptspi_read_parameters,
+	.set_qas	= mptspi_write_qas,
+	.show_qas	= 1,
+	.get_wr_flow	= mptspi_read_parameters,
+	.show_wr_flow	= 1,
+	.get_rd_strm	= mptspi_read_parameters,
+	.show_rd_strm	= 1,
+	.get_rti	= mptspi_read_parameters,
+	.show_rti	= 1,
+	.get_pcomp_en	= mptspi_read_parameters,
+	.show_pcomp_en	= 1,
+};
+
 
 /****************************************************************************
  * Supported hardware
@@ -382,7 +748,6 @@ mptspi_probe(struct pci_dev *pdev, const
 		mpt_saf_te,
 		mpt_pq_filter));
 #endif
-
 	ioc->spi_data.forceDv = 0;
 	ioc->spi_data.noQas = 0;
 
@@ -398,6 +763,11 @@ mptspi_probe(struct pci_dev *pdev, const
 	hd->scandv_wait_done = 0;
 	hd->last_queue_full = 0;
 
+	/* Some versions of the firmware don't support page 0; without
+	 * that we can't get the parameters */
+	if (hd->ioc->spi_data.sdp0length != 0)
+		sh->transportt = mptspi_transport_template;
+
 	error = scsi_add_host (sh, &ioc->pcidev->dev);
 	if(error) {
 		dprintk((KERN_ERR MYNAM
@@ -441,6 +811,10 @@ mptspi_init(void)
 
 	show_mptmod_ver(my_NAME, my_VERSION);
 
+	mptspi_transport_template = spi_attach_transport(&mptspi_transport_functions);
+	if (!mptspi_transport_template)
+		return -ENODEV;
+
 	mptspiDoneCtx = mpt_register(mptscsih_io_done, MPTSPI_DRIVER);
 	mptspiTaskCtx = mpt_register(mptscsih_taskmgmt_complete, MPTSPI_DRIVER);
 	mptspiInternalCtx = mpt_register(mptscsih_scandv_complete, MPTSPI_DRIVER);