[PATCH] I2O: Adaptec specific SG_IO access, firmware access through sysfs and 2400A workaround

Changes:
 - Provide SG_IO access to BLOCK and EXECUTIVE class on Adaptec
   controllers
 - Use PRIVATE messages in SCSI-OSM because on some controllers normal
   SCSI class commands like READ or READ CAPACITY cause errors
 - Use new DMA and SG list creation function
 - Added workaround to limit sectors per request for Adaptec 2400A
   controllers

Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 74 insertions, 11 deletions

diff --git a/include/linux/i2o-dev.h b/include/linux/i2o-dev.h
index 90c984ecd521..d4a08d29e36d 100644
--- a/include/linux/i2o-dev.h
+++ b/include/linux/i2o-dev.h
@@ -33,6 +33,13 @@ typedef unsigned int u32;
 #endif                          /* __KERNEL__ */
 
 /*
+ *      Software module types
+ */
+#define I2O_SOFTWARE_MODULE_IRTOS               0x11
+#define I2O_SOFTWARE_MODULE_IOP_PRIVATE         0x22
+#define I2O_SOFTWARE_MODULE_IOP_CONFIG          0x23
+
+/*
  *      Vendors
  */
 #define I2O_VENDOR_DPT                          0x001b
@@ -125,6 +132,10 @@ struct i2o_evt_get {
         int lost;
 };
 
+typedef struct i2o_sg_io_hdr {
+        unsigned int flags;     /* see I2O_DPT_SG_IO_FLAGS */
+} i2o_sg_io_hdr_t;
+
 /**************************************************************************
  * HRT related constants and structures
  **************************************************************************/
@@ -403,4 +414,15 @@ typedef struct _i2o_status_block {
 #define ADAPTER_STATE_FAILED                    0x10
 #define ADAPTER_STATE_FAULTED                   0x11
 
+
+/*
+ * DPT / Adaptec specific values for i2o_sg_io_hdr flags.
+ */
+#define I2O_DPT_SG_FLAG_INTERPRET               0x00010000
+#define I2O_DPT_SG_FLAG_PHYSICAL                0x00020000
+
+#define I2O_DPT_FLASH_FRAG_SIZE                 0x10000
+#define I2O_DPT_FLASH_READ                      0x0101
+#define I2O_DPT_FLASH_WRITE                     0x0102
+
 #endif                          /* _I2O_DEV_H */
diff --git a/include/linux/i2o.h b/include/linux/i2o.h
index 497ea574f96b..2039a87c2b91 100644
--- a/include/linux/i2o.h
+++ b/include/linux/i2o.h
@@ -147,10 +147,13 @@ struct i2o_controller {
 
         struct pci_dev *pdev;   /* PCI device */
 
-        unsigned int short_req:1;       /* use small block sizes */
-        unsigned int no_quiesce:1;      /* dont quiesce before reset */
-        unsigned int raptor:1;          /* split bar */
         unsigned int promise:1;         /* Promise controller */
+        unsigned int adaptec:1;         /* DPT / Adaptec controller */
+        unsigned int raptor:1;  /* split bar */
+        unsigned int no_quiesce:1;      /* dont quiesce before reset */
+        unsigned int short_req:1;       /* use small block sizes */
+        unsigned int limit_sectors:1;   /* limit number of sectors / request */
+        unsigned int pae_support:1;     /* controller has 64-bit SGL support */
 
         struct list_head devices;       /* list of I2O devices */
         struct list_head list;  /* Controller list */
@@ -746,7 +749,21 @@ static inline struct i2o_message __iomem *i2o_msg_in_to_virt(struct i2o_controll
 static inline int i2o_dma_alloc(struct device *dev, struct i2o_dma *addr,
                                 size_t len, unsigned int gfp_mask)
 {
+        struct pci_dev *pdev = to_pci_dev(dev);
+        int dma_64 = 0;
+
+        if ((sizeof(dma_addr_t) > 4) && (pdev->dma_mask == DMA_64BIT_MASK)) {
+                        dma_64 = 1;
+                        if(pci_set_dma_mask(pdev, DMA_32BIT_MASK))
+                                return -ENOMEM;
+        }
+
         addr->virt = dma_alloc_coherent(dev, len, &addr->phys, gfp_mask);
+
+        if ((sizeof(dma_addr_t) > 4) && dma_64)
+                if(pci_set_dma_mask(pdev, DMA_64BIT_MASK))
+                        printk(KERN_WARNING "i2o: unable to set 64-bit DMA");
+
         if (!addr->virt)
                 return -ENOMEM;
 
@@ -946,7 +963,7 @@ extern void i2o_debug_state(struct i2o_controller *c);
 #define I2O_CMD_BLOCK_MEJECT            0x43
 #define I2O_CMD_BLOCK_POWER             0x70
 
-#define I2O_PRIVATE_MSG                 0xFF
+#define I2O_CMD_PRIVATE                 0xFF
 
 /* Command status values  */
 
@@ -1095,9 +1112,9 @@ extern void i2o_debug_state(struct i2o_controller *c);
 #define SGL_OFFSET_8    (0x0080 | I2OVERSION)
 #define SGL_OFFSET_9    (0x0090 | I2OVERSION)
 #define SGL_OFFSET_10   (0x00A0 | I2OVERSION)
-
-#define TRL_OFFSET_5    (0x0050 | I2OVERSION)
-#define TRL_OFFSET_6    (0x0060 | I2OVERSION)
+#define SGL_OFFSET_11   (0x00B0 | I2OVERSION)
+#define SGL_OFFSET_12   (0x00C0 | I2OVERSION)
+#define SGL_OFFSET(x)   (((x)<<4) | I2OVERSION)
 
 /* Transaction Reply Lists (TRL) Control Word structure */
 #define TRL_SINGLE_FIXED_LENGTH         0x00
@@ -1130,7 +1147,6 @@ extern void i2o_debug_state(struct i2o_controller *c);
 #define HOST_TID                1
 
 #define MSG_FRAME_SIZE          128     /* i2o_scsi assumes >= 32 */
-#define REPLY_FRAME_SIZE        17
 #define SG_TABLESIZE            30
 #define NMBR_MSG_FRAMES         128
 
@@ -1155,11 +1171,10 @@ extern void i2o_debug_state(struct i2o_controller *c);
 #define I2O_HRT_GET_TRIES               3
 #define I2O_LCT_GET_TRIES               3
 
-/* request queue sizes */
+/* defines for max_sectors and max_phys_segments */
 #define I2O_MAX_SECTORS                 1024
+#define I2O_MAX_SECTORS_LIMITED         256
 #define I2O_MAX_PHYS_SEGMENTS           MAX_PHYS_SEGMENTS
 
-#define I2O_REQ_MEMPOOL_SIZE            32
-
 #endif                          /* __KERNEL__ */
 #endif                          /* _I2O_H */
diff --git a/include/scsi/sg_request.h b/include/scsi/sg_request.h
new file mode 100644
index 000000000000..57ff525bdd3b
--- /dev/null
+++ b/include/scsi/sg_request.h
@@ -0,0 +1,26 @@
+typedef struct scsi_request Scsi_Request;
+
+static Scsi_Request *dummy_cmdp;        /* only used for sizeof */
+
+typedef struct sg_scatter_hold { /* holding area for scsi scatter gather info */
+        unsigned short k_use_sg; /* Count of kernel scatter-gather pieces */
+        unsigned short sglist_len; /* size of malloc'd scatter-gather list ++ */
+        unsigned bufflen;       /* Size of (aggregate) data buffer */
+        unsigned b_malloc_len;  /* actual len malloc'ed in buffer */
+        void *buffer;           /* Data buffer or scatter list (k_use_sg>0) */
+        char dio_in_use;        /* 0->indirect IO (or mmap), 1->dio */
+        unsigned char cmd_opcode; /* first byte of command */
+} Sg_scatter_hold;
+
+typedef struct sg_request {     /* SG_MAX_QUEUE requests outstanding per file */
+        Scsi_Request *my_cmdp;  /* != 0  when request with lower levels */
+        struct sg_request *nextrp;      /* NULL -> tail request (slist) */
+        struct sg_fd *parentfp; /* NULL -> not in use */
+        Sg_scatter_hold data;   /* hold buffer, perhaps scatter list */
+        sg_io_hdr_t header;     /* scsi command+info, see <scsi/sg.h> */
+        unsigned char sense_b[sizeof (dummy_cmdp->sr_sense_buffer)];
+        char res_used;          /* 1 -> using reserve buffer, 0 -> not ... */
+        char orphan;            /* 1 -> drop on sight, 0 -> normal */
+        char sg_io_owned;       /* 1 -> packet belongs to SG_IO */
+        volatile char done;     /* 0->before bh, 1->before read, 2->read */
+} Sg_request;