[SCSI] qla2xxx: Add flash burst-read/write support.

Newer ISPs support a mechanism to read and write flash-memory via
the firmware LOAD/DUMP memory mailbox command routines.  When
supported, utilizing these mechanisms significantly reduces
overall access times.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 166 insertions, 55 deletions

diff --git a/drivers/scsi/qla2xxx/qla_sup.c b/drivers/scsi/qla2xxx/qla_sup.c
index a925a3f179f9..ad3d1de51d8c 100644
--- a/drivers/scsi/qla2xxx/qla_sup.c
+++ b/drivers/scsi/qla2xxx/qla_sup.c
@@ -425,6 +425,9 @@ qla2x00_set_nvram_protection(scsi_qla_host_t *ha, int stat)
 /* Flash Manipulation Routines                                               */
 /*****************************************************************************/
 
+#define OPTROM_BURST_SIZE       0x1000
+#define OPTROM_BURST_DWORDS     (OPTROM_BURST_SIZE / 4)
+
 static inline uint32_t
 flash_conf_to_access_addr(uint32_t faddr)
 {
@@ -544,41 +547,59 @@ qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
     uint32_t dwords)
 {
         int ret;
-        uint32_t liter;
-        uint32_t sec_mask, rest_addr, conf_addr, sec_end_mask;
+        uint32_t liter, miter;
+        uint32_t sec_mask, rest_addr, conf_addr;
         uint32_t fdata, findex ;
         uint8_t man_id, flash_id;
         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
+        dma_addr_t optrom_dma;
+        void *optrom = NULL;
+        uint32_t *s, *d;
 
         ret = QLA_SUCCESS;
 
+        /* Prepare burst-capable write on supported ISPs. */
+        if (IS_QLA25XX(ha) && !(faddr & ~OPTROM_BURST_SIZE) &&
+            dwords > OPTROM_BURST_DWORDS) {
+                optrom = dma_alloc_coherent(&ha->pdev->dev, OPTROM_BURST_SIZE,
+                    &optrom_dma, GFP_KERNEL);
+                if (!optrom) {
+                        qla_printk(KERN_DEBUG, ha,
+                            "Unable to allocate memory for optrom burst write "
+                            "(%x KB).\n", OPTROM_BURST_SIZE / 1024);
+                }
+        }
+
         qla24xx_get_flash_manufacturer(ha, &man_id, &flash_id);
         DEBUG9(printk("%s(%ld): Flash man_id=%d flash_id=%d\n", __func__,
             ha->host_no, man_id, flash_id));
 
-        sec_end_mask = 0;
         conf_addr = flash_conf_to_access_addr(0x03d8);
         switch (man_id) {
         case 0xbf: /* STT flash. */
-                rest_addr = 0x1fff;
-                sec_mask = 0x3e000;
+                if (flash_id == 0x8e) {
+                        rest_addr = 0x3fff;
+                        sec_mask = 0x7c000;
+                } else {
+                        rest_addr = 0x1fff;
+                        sec_mask = 0x7e000;
+                }
                 if (flash_id == 0x80)
                         conf_addr = flash_conf_to_access_addr(0x0352);
                 break;
         case 0x13: /* ST M25P80. */
                 rest_addr = 0x3fff;
-                sec_mask = 0x3c000;
+                sec_mask = 0x7c000;
                 break;
         case 0x1f: // Atmel 26DF081A
-                rest_addr = 0x0fff;
-                sec_mask = 0xff000;
-                sec_end_mask = 0x003ff;
+                rest_addr = 0x3fff;
+                sec_mask = 0x7c000;
                 conf_addr = flash_conf_to_access_addr(0x0320);
                 break;
         default:
                 /* Default to 64 kb sector size. */
                 rest_addr = 0x3fff;
-                sec_mask = 0x3c000;
+                sec_mask = 0x7c000;
                 break;
         }
 
@@ -592,56 +613,81 @@ qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
         /* Some flash parts need an additional zero-write to clear bits.*/
         qla24xx_write_flash_dword(ha, flash_conf_to_access_addr(0x101), 0);
 
-        do {    /* Loop once to provide quick error exit. */
-                for (liter = 0; liter < dwords; liter++, faddr++, dwptr++) {
-                        if (man_id == 0x1f) {
-                                findex = faddr << 2;
-                                fdata = findex & sec_mask;
-                        } else {
-                                findex = faddr;
-                                fdata = (findex & sec_mask) << 2;
-                        }
+        for (liter = 0; liter < dwords; liter++, faddr++, dwptr++) {
+                if (man_id == 0x1f) {
+                        findex = faddr << 2;
+                        fdata = findex & sec_mask;
+                } else {
+                        findex = faddr;
+                        fdata = (findex & sec_mask) << 2;
+                }
 
-                        /* Are we at the beginning of a sector? */
-                        if ((findex & rest_addr) == 0) {
-                                /*
-                                 * Do sector unprotect at 4K boundry for Atmel
-                                 * part.
-                                 */
-                                if (man_id == 0x1f)
-                                        qla24xx_write_flash_dword(ha,
-                                            flash_conf_to_access_addr(0x0339),
-                                            (fdata & 0xff00) | ((fdata << 16) &
-                                            0xff0000) | ((fdata >> 16) & 0xff));
-                                ret = qla24xx_write_flash_dword(ha, conf_addr,
-                                    (fdata & 0xff00) |((fdata << 16) &
+                /* Are we at the beginning of a sector? */
+                if ((findex & rest_addr) == 0) {
+                        /* Do sector unprotect at 4K boundry for Atmel part. */
+                        if (man_id == 0x1f)
+                                qla24xx_write_flash_dword(ha,
+                                    flash_conf_to_access_addr(0x0339),
+                                    (fdata & 0xff00) | ((fdata << 16) &
                                     0xff0000) | ((fdata >> 16) & 0xff));
-                                if (ret != QLA_SUCCESS) {
-                                        DEBUG9(printk("%s(%ld) Unable to flash "
-                                            "sector: address=%x.\n", __func__,
-                                            ha->host_no, faddr));
-                                        break;
-                                }
+                        ret = qla24xx_write_flash_dword(ha, conf_addr,
+                            (fdata & 0xff00) |((fdata << 16) &
+                            0xff0000) | ((fdata >> 16) & 0xff));
+                        if (ret != QLA_SUCCESS) {
+                                DEBUG9(printk("%s(%ld) Unable to flash "
+                                    "sector: address=%x.\n", __func__,
+                                    ha->host_no, faddr));
+                                break;
                         }
-                        ret = qla24xx_write_flash_dword(ha,
+                }
+
+                /* Go with burst-write. */
+                if (optrom && (liter + OPTROM_BURST_DWORDS) < dwords) {
+                        /* Copy data to DMA'ble buffer. */
+                        for (miter = 0, s = optrom, d = dwptr;
+                            miter < OPTROM_BURST_DWORDS; miter++, s++, d++)
+                                *s = cpu_to_le32(*d);
+
+                        ret = qla2x00_load_ram(ha, optrom_dma,
                             flash_data_to_access_addr(faddr),
-                            cpu_to_le32(*dwptr));
+                            OPTROM_BURST_DWORDS);
                         if (ret != QLA_SUCCESS) {
-                                DEBUG9(printk("%s(%ld) Unable to program flash "
-                                    "address=%x data=%x.\n", __func__,
-                                    ha->host_no, faddr, *dwptr));
-                                break;
+                                qla_printk(KERN_WARNING, ha,
+                                    "Unable to burst-write optrom segment "
+                                    "(%x/%x/%llx).\n", ret,
+                                    flash_data_to_access_addr(faddr),
+                                    optrom_dma);
+                                qla_printk(KERN_WARNING, ha,
+                                    "Reverting to slow-write.\n");
+
+                                dma_free_coherent(&ha->pdev->dev,
+                                    OPTROM_BURST_SIZE, optrom, optrom_dma);
+                                optrom = NULL;
+                        } else {
+                                liter += OPTROM_BURST_DWORDS - 1;
+                                faddr += OPTROM_BURST_DWORDS - 1;
+                                dwptr += OPTROM_BURST_DWORDS - 1;
+                                continue;
                         }
+                }
 
-                        /* Do sector protect at 4K boundry for Atmel part. */
-                        if (man_id == 0x1f &&
-                            ((faddr & sec_end_mask) == 0x3ff))
-                                qla24xx_write_flash_dword(ha,
-                                    flash_conf_to_access_addr(0x0336),
-                                    (fdata & 0xff00) | ((fdata << 16) &
-                                    0xff0000) | ((fdata >> 16) & 0xff));
+                ret = qla24xx_write_flash_dword(ha,
+                    flash_data_to_access_addr(faddr), cpu_to_le32(*dwptr));
+                if (ret != QLA_SUCCESS) {
+                        DEBUG9(printk("%s(%ld) Unable to program flash "
+                            "address=%x data=%x.\n", __func__,
+                            ha->host_no, faddr, *dwptr));
+                        break;
                 }
-        } while (0);
+
+                /* Do sector protect at 4K boundry for Atmel part. */
+                if (man_id == 0x1f &&
+                    ((faddr & rest_addr) == rest_addr))
+                        qla24xx_write_flash_dword(ha,
+                            flash_conf_to_access_addr(0x0336),
+                            (fdata & 0xff00) | ((fdata << 16) &
+                            0xff0000) | ((fdata >> 16) & 0xff));
+        }
 
         /* Enable flash write-protection. */
         qla24xx_write_flash_dword(ha, flash_conf_to_access_addr(0x101), 0x9c);
@@ -651,6 +697,10 @@ qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
             RD_REG_DWORD(&reg->ctrl_status) & ~CSRX_FLASH_ENABLE);
         RD_REG_DWORD(&reg->ctrl_status);        /* PCI Posting. */
 
+        if (optrom)
+                dma_free_coherent(&ha->pdev->dev,
+                    OPTROM_BURST_SIZE, optrom, optrom_dma);
+
         return ret;
 }
 
@@ -1728,7 +1778,6 @@ qla24xx_read_optrom_data(struct scsi_qla_host *ha, uint8_t *buf,
 {
         /* Suspend HBA. */
         scsi_block_requests(ha->host);
-        ha->isp_ops->disable_intrs(ha);
         set_bit(MBX_UPDATE_FLASH_ACTIVE, &ha->mbx_cmd_flags);
 
         /* Go with read. */
@@ -1736,7 +1785,6 @@ qla24xx_read_optrom_data(struct scsi_qla_host *ha, uint8_t *buf,
 
         /* Resume HBA. */
         clear_bit(MBX_UPDATE_FLASH_ACTIVE, &ha->mbx_cmd_flags);
-        ha->isp_ops->enable_intrs(ha);
         scsi_unblock_requests(ha->host);
 
         return buf;
@@ -1750,7 +1798,6 @@ qla24xx_write_optrom_data(struct scsi_qla_host *ha, uint8_t *buf,
 
         /* Suspend HBA. */
         scsi_block_requests(ha->host);
-        ha->isp_ops->disable_intrs(ha);
         set_bit(MBX_UPDATE_FLASH_ACTIVE, &ha->mbx_cmd_flags);
 
         /* Go with write. */
@@ -1767,6 +1814,70 @@ qla24xx_write_optrom_data(struct scsi_qla_host *ha, uint8_t *buf,
         return rval;
 }
 
+uint8_t *
+qla25xx_read_optrom_data(struct scsi_qla_host *ha, uint8_t *buf,
+    uint32_t offset, uint32_t length)
+{
+        int rval;
+        dma_addr_t optrom_dma;
+        void *optrom;
+        uint8_t *pbuf;
+        uint32_t faddr, left, burst;
+
+        if (offset & ~OPTROM_BURST_SIZE)
+                goto slow_read;
+        if (length < OPTROM_BURST_SIZE)
+                goto slow_read;
+
+        optrom = dma_alloc_coherent(&ha->pdev->dev, OPTROM_BURST_SIZE,
+            &optrom_dma, GFP_KERNEL);
+        if (!optrom) {
+                qla_printk(KERN_DEBUG, ha,
+                    "Unable to allocate memory for optrom burst read "
+                    "(%x KB).\n", OPTROM_BURST_SIZE / 1024);
+
+                goto slow_read;
+        }
+
+        pbuf = buf;
+        faddr = offset >> 2;
+        left = length >> 2;
+        burst = OPTROM_BURST_DWORDS;
+        while (left != 0) {
+                if (burst > left)
+                        burst = left;
+
+                rval = qla2x00_dump_ram(ha, optrom_dma,
+                    flash_data_to_access_addr(faddr), burst);
+                if (rval) {
+                        qla_printk(KERN_WARNING, ha,
+                            "Unable to burst-read optrom segment "
+                            "(%x/%x/%llx).\n", rval,
+                            flash_data_to_access_addr(faddr), optrom_dma);
+                        qla_printk(KERN_WARNING, ha,
+                            "Reverting to slow-read.\n");
+
+                        dma_free_coherent(&ha->pdev->dev, OPTROM_BURST_SIZE,
+                            optrom, optrom_dma);
+                        goto slow_read;
+                }
+
+                memcpy(pbuf, optrom, burst * 4);
+
+                left -= burst;
+                faddr += burst;
+                pbuf += burst * 4;
+        }
+
+        dma_free_coherent(&ha->pdev->dev, OPTROM_BURST_SIZE, optrom,
+            optrom_dma);
+
+        return buf;
+
+slow_read:
+    return qla24xx_read_optrom_data(ha, buf, offset, length);
+}
+
 /**
  * qla2x00_get_fcode_version() - Determine an FCODE image's version.
  * @ha: HA context