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From: Khalid Aziz <khalid@gonehiking.org>
To: Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	Matthew Wilcox <willy@infradead.org>,
	Hannes Reinecke <hare@suse.com>,
	Ondrej Zary <linux@rainbow-software.org>
Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org,
	Hannes Reinecke <hare@suse.de>
Subject: Re: [PATCH 2/8] Buslogic: remove ISA support
Date: Wed, 31 Mar 2021 12:24:05 -0600	[thread overview]
Message-ID: <de168d8f-5262-efea-d53e-1f90e2f1e468@gonehiking.org> (raw)
In-Reply-To: <20210331073001.46776-3-hch@lst.de>

On 3/31/21 1:29 AM, Christoph Hellwig wrote:
> The ISA support in Buslogic has been broken for a long time, as all
> the I/O path expects a struct device for DMA mapping that is derived from
> the PCI device, which would simply crash for ISA adapters.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
> Reviewed-by: Hannes Reinecke <hare@suse.de>
> ---
>  Documentation/scsi/BusLogic.rst |  26 +----
>  drivers/scsi/BusLogic.c         | 184 +-------------------------------
>  drivers/scsi/BusLogic.h         |  10 --
>  drivers/scsi/Kconfig            |   2 +-
>  4 files changed, 7 insertions(+), 215 deletions(-)


Looks good to me.

Acked-by: Khalid Aziz <khalid@gonehiking.org>


> 
> diff --git a/Documentation/scsi/BusLogic.rst b/Documentation/scsi/BusLogic.rst
> index b6016981235820..d7d4d56981ca23 100644
> --- a/Documentation/scsi/BusLogic.rst
> +++ b/Documentation/scsi/BusLogic.rst
> @@ -251,8 +251,6 @@ BT-445C	    VLB		Fast SCSI-2
>  BT-747C	    EISA	Fast SCSI-2
>  BT-757C	    EISA	Wide Fast SCSI-2
>  BT-757CD    EISA	Wide Differential Fast SCSI-2
> -BT-545C	    ISA		Fast SCSI-2
> -BT-540CF    ISA		Fast SCSI-2
>  ========    ====	==============================
>  
>  MultiMaster "S" Series Host Adapters:
> @@ -263,17 +261,13 @@ BT-747S	    EISA	Fast SCSI-2
>  BT-747D	    EISA	Differential Fast SCSI-2
>  BT-757S	    EISA	Wide Fast SCSI-2
>  BT-757D	    EISA	Wide Differential Fast SCSI-2
> -BT-545S	    ISA		Fast SCSI-2
> -BT-542D	    ISA		Differential Fast SCSI-2
>  BT-742A	    EISA	SCSI-2 (742A revision H)
> -BT-542B	    ISA		SCSI-2 (542B revision H)
>  =======     ====	==============================
>  
>  MultiMaster "A" Series Host Adapters:
>  
>  =======     ====	==============================
>  BT-742A	    EISA	SCSI-2 (742A revisions A - G)
> -BT-542B	    ISA		SCSI-2 (542B revisions A - G)
>  =======     ====	==============================
>  
>  AMI FastDisk Host Adapters that are true BusLogic MultiMaster clones are also
> @@ -400,26 +394,11 @@ selected host adapter.
>  
>  The BusLogic Driver Probing Options comprise the following:
>  
> -IO:<integer>
> -
> -  The "IO:" option specifies an ISA I/O Address to be probed for a non-PCI
> -  MultiMaster Host Adapter.  If neither "IO:" nor "NoProbeISA" options are
> -  specified, then the standard list of BusLogic MultiMaster ISA I/O Addresses
> -  will be probed (0x330, 0x334, 0x230, 0x234, 0x130, and 0x134).  Multiple
> -  "IO:" options may be specified to precisely determine the I/O Addresses to
> -  be probed, but the probe order will always follow the standard list.
> -
>  NoProbe
>  
>    The "NoProbe" option disables all probing and therefore no BusLogic Host
>    Adapters will be detected.
>  
> -NoProbeISA
> -
> -  The "NoProbeISA" option disables probing of the standard BusLogic ISA I/O
> -  Addresses and therefore only PCI MultiMaster and FlashPoint Host Adapters
> -  will be detected.
> -
>  NoProbePCI
>  
>    The "NoProbePCI" options disables the interrogation of PCI Configuration
> @@ -464,10 +443,7 @@ QueueDepth:<integer>
>    Depth for devices that do not support Tagged Queuing.  If no Queue Depth
>    option is provided, the Queue Depth will be determined automatically based
>    on the Host Adapter's Total Queue Depth and the number, type, speed, and
> -  capabilities of the detected Target Devices.  For Host Adapters that
> -  require ISA Bounce Buffers, the Queue Depth is automatically set by default
> -  to BusLogic_TaggedQueueDepthBB or BusLogic_UntaggedQueueDepthBB to avoid
> -  excessive preallocation of DMA Bounce Buffer memory.  Target Devices that
> +  capabilities of the detected Target Devices.  Target Devices that
>    do not support Tagged Queuing always have their Queue Depth set to
>    BusLogic_UntaggedQueueDepth or BusLogic_UntaggedQueueDepthBB, unless a
>    lower Queue Depth option is provided.  A Queue Depth of 1 automatically
> diff --git a/drivers/scsi/BusLogic.c b/drivers/scsi/BusLogic.c
> index ccb061ab0a0ad2..25ca2f9383462c 100644
> --- a/drivers/scsi/BusLogic.c
> +++ b/drivers/scsi/BusLogic.c
> @@ -561,60 +561,6 @@ static int blogic_cmd(struct blogic_adapter *adapter, enum blogic_opcode opcode,
>  }
>  
>  
> -/*
> -  blogic_add_probeaddr_isa appends a single ISA I/O Address to the list
> -  of I/O Address and Bus Probe Information to be checked for potential BusLogic
> -  Host Adapters.
> -*/
> -
> -static void __init blogic_add_probeaddr_isa(unsigned long io_addr)
> -{
> -	struct blogic_probeinfo *probeinfo;
> -	if (blogic_probeinfo_count >= BLOGIC_MAX_ADAPTERS)
> -		return;
> -	probeinfo = &blogic_probeinfo_list[blogic_probeinfo_count++];
> -	probeinfo->adapter_type = BLOGIC_MULTIMASTER;
> -	probeinfo->adapter_bus_type = BLOGIC_ISA_BUS;
> -	probeinfo->io_addr = io_addr;
> -	probeinfo->pci_device = NULL;
> -}
> -
> -
> -/*
> -  blogic_init_probeinfo_isa initializes the list of I/O Address and
> -  Bus Probe Information to be checked for potential BusLogic SCSI Host Adapters
> -  only from the list of standard BusLogic MultiMaster ISA I/O Addresses.
> -*/
> -
> -static void __init blogic_init_probeinfo_isa(struct blogic_adapter *adapter)
> -{
> -	/*
> -	   If BusLogic Driver Options specifications requested that ISA
> -	   Bus Probes be inhibited, do not proceed further.
> -	 */
> -	if (blogic_probe_options.noprobe_isa)
> -		return;
> -	/*
> -	   Append the list of standard BusLogic MultiMaster ISA I/O Addresses.
> -	 */
> -	if (!blogic_probe_options.limited_isa || blogic_probe_options.probe330)
> -		blogic_add_probeaddr_isa(0x330);
> -	if (!blogic_probe_options.limited_isa || blogic_probe_options.probe334)
> -		blogic_add_probeaddr_isa(0x334);
> -	if (!blogic_probe_options.limited_isa || blogic_probe_options.probe230)
> -		blogic_add_probeaddr_isa(0x230);
> -	if (!blogic_probe_options.limited_isa || blogic_probe_options.probe234)
> -		blogic_add_probeaddr_isa(0x234);
> -	if (!blogic_probe_options.limited_isa || blogic_probe_options.probe130)
> -		blogic_add_probeaddr_isa(0x130);
> -	if (!blogic_probe_options.limited_isa || blogic_probe_options.probe134)
> -		blogic_add_probeaddr_isa(0x134);
> -}
> -
> -
> -#ifdef CONFIG_PCI
> -
> -
>  /*
>    blogic_sort_probeinfo sorts a section of blogic_probeinfo_list in order
>    of increasing PCI Bus and Device Number.
> @@ -667,14 +613,11 @@ static int __init blogic_init_mm_probeinfo(struct blogic_adapter *adapter)
>  	int nonpr_mmcount = 0, mmcount = 0;
>  	bool force_scan_order = false;
>  	bool force_scan_order_checked = false;
> -	bool addr_seen[6];
>  	struct pci_dev *pci_device = NULL;
>  	int i;
>  	if (blogic_probeinfo_count >= BLOGIC_MAX_ADAPTERS)
>  		return 0;
>  	blogic_probeinfo_count++;
> -	for (i = 0; i < 6; i++)
> -		addr_seen[i] = false;
>  	/*
>  	   Iterate over the MultiMaster PCI Host Adapters.  For each
>  	   enumerated host adapter, determine whether its ISA Compatible
> @@ -744,11 +687,8 @@ static int __init blogic_init_mm_probeinfo(struct blogic_adapter *adapter)
>  		host_adapter->io_addr = io_addr;
>  		blogic_intreset(host_adapter);
>  		if (blogic_cmd(host_adapter, BLOGIC_INQ_PCI_INFO, NULL, 0,
> -				&adapter_info, sizeof(adapter_info)) ==
> -				sizeof(adapter_info)) {
> -			if (adapter_info.isa_port < 6)
> -				addr_seen[adapter_info.isa_port] = true;
> -		} else
> +				&adapter_info, sizeof(adapter_info)) !=
> +				sizeof(adapter_info))
>  			adapter_info.isa_port = BLOGIC_IO_DISABLE;
>  		/*
>  		   Issue the Modify I/O Address command to disable the
> @@ -835,45 +775,6 @@ static int __init blogic_init_mm_probeinfo(struct blogic_adapter *adapter)
>  	if (force_scan_order)
>  		blogic_sort_probeinfo(&blogic_probeinfo_list[nonpr_mmindex],
>  					nonpr_mmcount);
> -	/*
> -	   If no PCI MultiMaster Host Adapter is assigned the Primary
> -	   I/O Address, then the Primary I/O Address must be probed
> -	   explicitly before any PCI host adapters are probed.
> -	 */
> -	if (!blogic_probe_options.noprobe_isa)
> -		if (pr_probeinfo->io_addr == 0 &&
> -				(!blogic_probe_options.limited_isa ||
> -				 blogic_probe_options.probe330)) {
> -			pr_probeinfo->adapter_type = BLOGIC_MULTIMASTER;
> -			pr_probeinfo->adapter_bus_type = BLOGIC_ISA_BUS;
> -			pr_probeinfo->io_addr = 0x330;
> -		}
> -	/*
> -	   Append the list of standard BusLogic MultiMaster ISA I/O Addresses,
> -	   omitting the Primary I/O Address which has already been handled.
> -	 */
> -	if (!blogic_probe_options.noprobe_isa) {
> -		if (!addr_seen[1] &&
> -				(!blogic_probe_options.limited_isa ||
> -				 blogic_probe_options.probe334))
> -			blogic_add_probeaddr_isa(0x334);
> -		if (!addr_seen[2] &&
> -				(!blogic_probe_options.limited_isa ||
> -				 blogic_probe_options.probe230))
> -			blogic_add_probeaddr_isa(0x230);
> -		if (!addr_seen[3] &&
> -				(!blogic_probe_options.limited_isa ||
> -				 blogic_probe_options.probe234))
> -			blogic_add_probeaddr_isa(0x234);
> -		if (!addr_seen[4] &&
> -				(!blogic_probe_options.limited_isa ||
> -				 blogic_probe_options.probe130))
> -			blogic_add_probeaddr_isa(0x130);
> -		if (!addr_seen[5] &&
> -				(!blogic_probe_options.limited_isa ||
> -				 blogic_probe_options.probe134))
> -			blogic_add_probeaddr_isa(0x134);
> -	}
>  	/*
>  	   Iterate over the older non-compliant MultiMaster PCI Host Adapters,
>  	   noting the PCI bus location and assigned IRQ Channel.
> @@ -1078,18 +979,10 @@ static void __init blogic_init_probeinfo_list(struct blogic_adapter *adapter)
>  				}
>  			}
>  		}
> -	} else {
> -		blogic_init_probeinfo_isa(adapter);
>  	}
>  }
>  
>  
> -#else
> -#define blogic_init_probeinfo_list(adapter) \
> -		blogic_init_probeinfo_isa(adapter)
> -#endif				/* CONFIG_PCI */
> -
> -
>  /*
>    blogic_failure prints a standardized error message, and then returns false.
>  */
> @@ -1539,14 +1432,6 @@ static bool __init blogic_rdconfig(struct blogic_adapter *adapter)
>  		else if (config.irq_ch15)
>  			adapter->irq_ch = 15;
>  	}
> -	if (adapter->adapter_bus_type == BLOGIC_ISA_BUS) {
> -		if (config.dma_ch5)
> -			adapter->dma_ch = 5;
> -		else if (config.dma_ch6)
> -			adapter->dma_ch = 6;
> -		else if (config.dma_ch7)
> -			adapter->dma_ch = 7;
> -	}
>  	/*
>  	   Determine whether Extended Translation is enabled and save it in
>  	   the Host Adapter structure.
> @@ -1686,8 +1571,7 @@ static bool __init blogic_rdconfig(struct blogic_adapter *adapter)
>  	if (adapter->fw_ver[0] == '5')
>  		adapter->adapter_qdepth = 192;
>  	else if (adapter->fw_ver[0] == '4')
> -		adapter->adapter_qdepth = (adapter->adapter_bus_type !=
> -						BLOGIC_ISA_BUS ? 100 : 50);
> +		adapter->adapter_qdepth = 100;
>  	else
>  		adapter->adapter_qdepth = 30;
>  	if (strcmp(adapter->fw_ver, "3.31") >= 0) {
> @@ -1727,13 +1611,6 @@ static bool __init blogic_rdconfig(struct blogic_adapter *adapter)
>  	   bios_addr is 0.
>  	 */
>  	adapter->bios_addr = ext_setupinfo.bios_addr << 12;
> -	/*
> -	   ISA Host Adapters require Bounce Buffers if there is more than
> -	   16MB memory.
> -	 */
> -	if (adapter->adapter_bus_type == BLOGIC_ISA_BUS &&
> -			(void *) high_memory > (void *) MAX_DMA_ADDRESS)
> -		adapter->need_bouncebuf = true;
>  	/*
>  	   BusLogic BT-445S Host Adapters prior to board revision E have a
>  	   hardware bug whereby when the BIOS is enabled, transfers to/from
> @@ -1839,11 +1716,7 @@ static bool __init blogic_reportconfig(struct blogic_adapter *adapter)
>  	blogic_info("Configuring BusLogic Model %s %s%s%s%s SCSI Host Adapter\n", adapter, adapter->model, blogic_adapter_busnames[adapter->adapter_bus_type], (adapter->wide ? " Wide" : ""), (adapter->differential ? " Differential" : ""), (adapter->ultra ? " Ultra" : ""));
>  	blogic_info("  Firmware Version: %s, I/O Address: 0x%lX, IRQ Channel: %d/%s\n", adapter, adapter->fw_ver, adapter->io_addr, adapter->irq_ch, (adapter->level_int ? "Level" : "Edge"));
>  	if (adapter->adapter_bus_type != BLOGIC_PCI_BUS) {
> -		blogic_info("  DMA Channel: ", adapter);
> -		if (adapter->dma_ch > 0)
> -			blogic_info("%d, ", adapter, adapter->dma_ch);
> -		else
> -			blogic_info("None, ", adapter);
> +		blogic_info("  DMA Channel: None, ", adapter);
>  		if (adapter->bios_addr > 0)
>  			blogic_info("BIOS Address: 0x%lX, ", adapter,
>  					adapter->bios_addr);
> @@ -1995,18 +1868,6 @@ static bool __init blogic_getres(struct blogic_adapter *adapter)
>  		return false;
>  	}
>  	adapter->irq_acquired = true;
> -	/*
> -	   Acquire exclusive access to the DMA Channel.
> -	 */
> -	if (adapter->dma_ch > 0) {
> -		if (request_dma(adapter->dma_ch, adapter->full_model) < 0) {
> -			blogic_err("UNABLE TO ACQUIRE DMA CHANNEL %d - DETACHING\n", adapter, adapter->dma_ch);
> -			return false;
> -		}
> -		set_dma_mode(adapter->dma_ch, DMA_MODE_CASCADE);
> -		enable_dma(adapter->dma_ch);
> -		adapter->dma_chan_acquired = true;
> -	}
>  	/*
>  	   Indicate the System Resource Acquisition completed successfully,
>  	 */
> @@ -2026,11 +1887,6 @@ static void blogic_relres(struct blogic_adapter *adapter)
>  	 */
>  	if (adapter->irq_acquired)
>  		free_irq(adapter->irq_ch, adapter);
> -	/*
> -	   Release exclusive access to the DMA Channel.
> -	 */
> -	if (adapter->dma_chan_acquired)
> -		free_dma(adapter->dma_ch);
>  	/*
>  	   Release any allocated memory structs not released elsewhere
>  	 */
> @@ -3666,37 +3522,7 @@ static int __init blogic_parseopts(char *options)
>  
>  		memset(drvr_opts, 0, sizeof(struct blogic_drvr_options));
>  		while (*options != '\0' && *options != ';') {
> -			/* Probing Options. */
> -			if (blogic_parse(&options, "IO:")) {
> -				unsigned long io_addr = simple_strtoul(options,
> -								&options, 0);
> -				blogic_probe_options.limited_isa = true;
> -				switch (io_addr) {
> -				case 0x330:
> -					blogic_probe_options.probe330 = true;
> -					break;
> -				case 0x334:
> -					blogic_probe_options.probe334 = true;
> -					break;
> -				case 0x230:
> -					blogic_probe_options.probe230 = true;
> -					break;
> -				case 0x234:
> -					blogic_probe_options.probe234 = true;
> -					break;
> -				case 0x130:
> -					blogic_probe_options.probe130 = true;
> -					break;
> -				case 0x134:
> -					blogic_probe_options.probe134 = true;
> -					break;
> -				default:
> -					blogic_err("BusLogic: Invalid Driver Options (invalid I/O Address 0x%lX)\n", NULL, io_addr);
> -					return 0;
> -				}
> -			} else if (blogic_parse(&options, "NoProbeISA"))
> -				blogic_probe_options.noprobe_isa = true;
> -			else if (blogic_parse(&options, "NoProbePCI"))
> +			if (blogic_parse(&options, "NoProbePCI"))
>  				blogic_probe_options.noprobe_pci = true;
>  			else if (blogic_parse(&options, "NoProbe"))
>  				blogic_probe_options.noprobe = true;
> diff --git a/drivers/scsi/BusLogic.h b/drivers/scsi/BusLogic.h
> index 6182cc8a0344a8..2eedeaa47970f0 100644
> --- a/drivers/scsi/BusLogic.h
> +++ b/drivers/scsi/BusLogic.h
> @@ -237,18 +237,10 @@ struct blogic_probeinfo {
>  
>  struct blogic_probe_options {
>  	bool noprobe:1;			/* Bit 0 */
> -	bool noprobe_isa:1;		/* Bit 1 */
>  	bool noprobe_pci:1;		/* Bit 2 */
>  	bool nosort_pci:1;		/* Bit 3 */
>  	bool multimaster_first:1;	/* Bit 4 */
>  	bool flashpoint_first:1;	/* Bit 5 */
> -	bool limited_isa:1;		/* Bit 6 */
> -	bool probe330:1;		/* Bit 7 */
> -	bool probe334:1;		/* Bit 8 */
> -	bool probe230:1;		/* Bit 9 */
> -	bool probe234:1;		/* Bit 10 */
> -	bool probe130:1;		/* Bit 11 */
> -	bool probe134:1;		/* Bit 12 */
>  };
>  
>  /*
> @@ -997,10 +989,8 @@ struct blogic_adapter {
>  	unsigned char bus;
>  	unsigned char dev;
>  	unsigned char irq_ch;
> -	unsigned char dma_ch;
>  	unsigned char scsi_id;
>  	bool irq_acquired:1;
> -	bool dma_chan_acquired:1;
>  	bool ext_trans_enable:1;
>  	bool parity:1;
>  	bool reset_enabled:1;
> diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
> index 06b87c7f6babd3..3d114be5b662df 100644
> --- a/drivers/scsi/Kconfig
> +++ b/drivers/scsi/Kconfig
> @@ -497,7 +497,7 @@ config SCSI_HPTIOP
>  
>  config SCSI_BUSLOGIC
>  	tristate "BusLogic SCSI support"
> -	depends on (PCI || ISA) && SCSI && ISA_DMA_API && VIRT_TO_BUS
> +	depends on PCI && SCSI && VIRT_TO_BUS
>  	help
>  	  This is support for BusLogic MultiMaster and FlashPoint SCSI Host
>  	  Adapters. Consult the SCSI-HOWTO, available from
> 


  reply	other threads:[~2021-03-31 18:25 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-31  7:29 start removing block bounce buffering support v3 Christoph Hellwig
2021-03-31  7:29 ` [PATCH 1/8] aha1542: use a local bounce buffer Christoph Hellwig
2021-03-31  7:29 ` [PATCH 2/8] Buslogic: remove ISA support Christoph Hellwig
2021-03-31 18:24   ` Khalid Aziz [this message]
2021-04-03 16:58   ` Maciej W. Rozycki
2021-04-06  6:27     ` Christoph Hellwig
2021-04-06 15:42       ` Maciej W. Rozycki
2021-04-12 12:26     ` Maciej W. Rozycki
2021-03-31  7:29 ` [PATCH 3/8] BusLogic: reject broken old firmware that requires ISA-style bounce buffering Christoph Hellwig
2021-03-31  7:29 ` [PATCH 4/8] advansys: remove ISA support Christoph Hellwig
2021-03-31  7:59   ` Hannes Reinecke
2021-03-31  7:29 ` [PATCH 5/8] scsi: remove the unchecked_isa_dma flag Christoph Hellwig
2021-04-09 15:46   ` Steffen Maier
2021-04-10  6:52     ` Christoph Hellwig
2021-04-12 14:04       ` Steffen Maier
2021-03-31  7:29 ` [PATCH 6/8] block: remove BLK_BOUNCE_ISA support Christoph Hellwig
2021-03-31  7:30 ` [PATCH 7/8] block: refactor the bounce buffering code Christoph Hellwig
2021-03-31  7:30 ` [PATCH 8/8] block: stop calling blk_queue_bounce for passthrough requests Christoph Hellwig
2021-04-08 21:45   ` Guenter Roeck
2021-04-09  7:40     ` Christoph Hellwig
2021-04-09 13:04       ` Guenter Roeck
2021-04-06 15:28 ` start removing block bounce buffering support v3 Jens Axboe
  -- strict thread matches above, loose matches on Subject: below --
2021-03-26  5:58 start removing block bounce buffering support v2 Christoph Hellwig
2021-03-26  5:58 ` [PATCH 2/8] Buslogic: remove ISA support Christoph Hellwig
2021-03-29  6:22   ` Hannes Reinecke
2021-03-29 20:29   ` Khalid Aziz
2021-03-30 17:03     ` Christoph Hellwig
2021-03-30 17:15       ` Khalid Aziz
2021-03-30 17:31         ` Christoph Hellwig
2021-03-18  6:39 start removing block bounce buffering support Christoph Hellwig
2021-03-18  6:39 ` [PATCH 2/8] Buslogic: remove ISA support Christoph Hellwig

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