[SCSI] qla2xxx: Add Flash Descriptor Table layout support.

The Flash Descriptor Table (FDT) present on many recent HBAs
encodes flash accessing characteristics of the flash-part used on
the HBA.  Use this information during flash manipulation (writes)
rather than using specific hard-coded values based on queried
manufacturer and device IDs.

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

1 files changed, 110 insertions, 43 deletions

diff --git a/drivers/scsi/qla2xxx/qla_sup.c b/drivers/scsi/qla2xxx/qla_sup.c
index c10ccc75c398..eda11f6f5e52 100644
--- a/drivers/scsi/qla2xxx/qla_sup.c
+++ b/drivers/scsi/qla2xxx/qla_sup.c
@@ -543,6 +543,96 @@ qla24xx_get_flash_manufacturer(scsi_qla_host_t *ha, uint8_t *man_id,
         }
 }
 
+void
+qla2xxx_get_flash_info(scsi_qla_host_t *ha)
+{
+#define FLASH_BLK_SIZE_32K      0x8000
+#define FLASH_BLK_SIZE_64K      0x10000
+        uint16_t cnt, chksum;
+        uint16_t *wptr;
+        struct qla_fdt_layout *fdt;
+        uint8_t man_id, flash_id;
+
+        if (!IS_QLA24XX(ha) && !IS_QLA25XX(ha))
+                return;
+
+        wptr = (uint16_t *)ha->request_ring;
+        fdt = (struct qla_fdt_layout *)ha->request_ring;
+        ha->isp_ops->read_optrom(ha, (uint8_t *)ha->request_ring,
+            FA_FLASH_DESCR_ADDR << 2, OPTROM_BURST_SIZE);
+        if (*wptr == __constant_cpu_to_le16(0xffff))
+                goto no_flash_data;
+        if (fdt->sig[0] != 'Q' || fdt->sig[1] != 'L' || fdt->sig[2] != 'I' ||
+            fdt->sig[3] != 'D')
+                goto no_flash_data;
+
+        for (cnt = 0, chksum = 0; cnt < sizeof(struct qla_fdt_layout) >> 1;
+            cnt++)
+                chksum += le16_to_cpu(*wptr++);
+        if (chksum) {
+                DEBUG2(qla_printk(KERN_INFO, ha, "Inconsistent FDT detected: "
+                    "checksum=0x%x id=%c version=0x%x.\n", chksum, fdt->sig[0],
+                    le16_to_cpu(fdt->version)));
+                DEBUG9(qla2x00_dump_buffer((uint8_t *)fdt, sizeof(*fdt)));
+                goto no_flash_data;
+        }
+
+        ha->fdt_odd_index = le16_to_cpu(fdt->man_id) == 0x1f;
+        ha->fdt_wrt_disable = fdt->wrt_disable_bits;
+        ha->fdt_erase_cmd = flash_conf_to_access_addr(0x0300 | fdt->erase_cmd);
+        ha->fdt_block_size = le32_to_cpu(fdt->block_size);
+        if (fdt->unprotect_sec_cmd) {
+                ha->fdt_unprotect_sec_cmd = flash_conf_to_access_addr(0x0300 |
+                    fdt->unprotect_sec_cmd);
+                ha->fdt_protect_sec_cmd = fdt->protect_sec_cmd ?
+                    flash_conf_to_access_addr(0x0300 | fdt->protect_sec_cmd):
+                    flash_conf_to_access_addr(0x0336);
+        }
+
+        DEBUG2(qla_printk(KERN_DEBUG, ha, "Flash[FDT]: (0x%x/0x%x) erase=0x%x "
+            "pro=%x upro=%x idx=%d wrtd=0x%x blk=0x%x.\n",
+            le16_to_cpu(fdt->man_id), le16_to_cpu(fdt->id), ha->fdt_erase_cmd,
+            ha->fdt_protect_sec_cmd, ha->fdt_unprotect_sec_cmd,
+            ha->fdt_odd_index, ha->fdt_wrt_disable, ha->fdt_block_size));
+        return;
+
+no_flash_data:
+        qla24xx_get_flash_manufacturer(ha, &man_id, &flash_id);
+        ha->fdt_wrt_disable = 0x9c;
+        ha->fdt_erase_cmd = flash_conf_to_access_addr(0x03d8);
+        switch (man_id) {
+        case 0xbf: /* STT flash. */
+                if (flash_id == 0x8e)
+                        ha->fdt_block_size = FLASH_BLK_SIZE_64K;
+                else
+                        ha->fdt_block_size = FLASH_BLK_SIZE_32K;
+
+                if (flash_id == 0x80)
+                        ha->fdt_erase_cmd = flash_conf_to_access_addr(0x0352);
+                break;
+        case 0x13: /* ST M25P80. */
+                ha->fdt_block_size = FLASH_BLK_SIZE_64K;
+                break;
+        case 0x1f: /* Atmel 26DF081A. */
+                ha->fdt_odd_index = 1;
+                ha->fdt_block_size = FLASH_BLK_SIZE_64K;
+                ha->fdt_erase_cmd = flash_conf_to_access_addr(0x0320);
+                ha->fdt_unprotect_sec_cmd = flash_conf_to_access_addr(0x0339);
+                ha->fdt_protect_sec_cmd = flash_conf_to_access_addr(0x0336);
+                break;
+        default:
+                /* Default to 64 kb sector size. */
+                ha->fdt_block_size = FLASH_BLK_SIZE_64K;
+                break;
+        }
+
+        DEBUG2(qla_printk(KERN_DEBUG, ha, "Flash[MID]: (0x%x/0x%x) erase=0x%x "
+            "pro=%x upro=%x idx=%d wrtd=0x%x blk=0x%x.\n", man_id, flash_id,
+            ha->fdt_erase_cmd, ha->fdt_protect_sec_cmd,
+            ha->fdt_unprotect_sec_cmd, ha->fdt_odd_index, ha->fdt_wrt_disable,
+            ha->fdt_block_size));
+}
+
 static void
 qla24xx_unprotect_flash(scsi_qla_host_t *ha)
 {
@@ -553,6 +643,9 @@ qla24xx_unprotect_flash(scsi_qla_host_t *ha)
             RD_REG_DWORD(&reg->ctrl_status) | CSRX_FLASH_ENABLE);
         RD_REG_DWORD(&reg->ctrl_status);        /* PCI Posting. */
 
+        if (!ha->fdt_wrt_disable)
+                return;
+
         /* Disable flash write-protection. */
         qla24xx_write_flash_dword(ha, flash_conf_to_access_addr(0x101), 0);
         /* Some flash parts need an additional zero-write to clear bits.*/
@@ -565,8 +658,12 @@ qla24xx_protect_flash(scsi_qla_host_t *ha)
         uint32_t cnt;
         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
 
+        if (!ha->fdt_wrt_disable)
+                goto skip_wrt_protect;
+
         /* Enable flash write-protection and wait for completion. */
-        qla24xx_write_flash_dword(ha, flash_conf_to_access_addr(0x101), 0x9c);
+        qla24xx_write_flash_dword(ha, flash_conf_to_access_addr(0x101),
+            ha->fdt_wrt_disable);
         for (cnt = 300; cnt &&
             qla24xx_read_flash_dword(ha,
                     flash_conf_to_access_addr(0x005)) & BIT_0;
@@ -574,6 +671,7 @@ qla24xx_protect_flash(scsi_qla_host_t *ha)
                 udelay(10);
         }
 
+skip_wrt_protect:
         /* Disable flash write. */
         WRT_REG_DWORD(&reg->ctrl_status,
             RD_REG_DWORD(&reg->ctrl_status) & ~CSRX_FLASH_ENABLE);
@@ -586,9 +684,8 @@ qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
 {
         int ret;
         uint32_t liter, miter;
-        uint32_t sec_mask, rest_addr, conf_addr;
+        uint32_t sec_mask, rest_addr;
         uint32_t fdata, findex;
-        uint8_t man_id, flash_id;
         dma_addr_t optrom_dma;
         void *optrom = NULL;
         uint32_t *s, *d;
@@ -607,43 +704,13 @@ qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
                 }
         }
 
-        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));
-
-        conf_addr = flash_conf_to_access_addr(0x03d8);
-        switch (man_id) {
-        case 0xbf: /* STT flash. */
-                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 = 0x7c000;
-                break;
-        case 0x1f: // Atmel 26DF081A
-                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 = 0x7c000;
-                break;
-        }
+        rest_addr = (ha->fdt_block_size >> 2) - 1;
+        sec_mask = 0x80000 - (ha->fdt_block_size >> 2);
 
         qla24xx_unprotect_flash(ha);
 
         for (liter = 0; liter < dwords; liter++, faddr++, dwptr++) {
-                if (man_id == 0x1f) {
+                if (ha->fdt_odd_index) {
                         findex = faddr << 2;
                         fdata = findex & sec_mask;
                 } else {
@@ -653,13 +720,13 @@ qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
 
                 /* 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)
+                        /* Do sector unprotect. */
+                        if (ha->fdt_unprotect_sec_cmd)
                                 qla24xx_write_flash_dword(ha,
-                                    flash_conf_to_access_addr(0x0339),
+                                    ha->fdt_unprotect_sec_cmd,
                                     (fdata & 0xff00) | ((fdata << 16) &
                                     0xff0000) | ((fdata >> 16) & 0xff));
-                        ret = qla24xx_write_flash_dword(ha, conf_addr,
+                        ret = qla24xx_write_flash_dword(ha, ha->fdt_erase_cmd,
                             (fdata & 0xff00) |((fdata << 16) &
                             0xff0000) | ((fdata >> 16) & 0xff));
                         if (ret != QLA_SUCCESS) {
@@ -709,11 +776,11 @@ qla24xx_write_flash_data(scsi_qla_host_t *ha, uint32_t *dwptr, uint32_t faddr,
                         break;
                 }
 
-                /* Do sector protect at 4K boundry for Atmel part. */
-                if (man_id == 0x1f &&
+                /* Do sector protect. */
+                if (ha->fdt_unprotect_sec_cmd &&
                     ((faddr & rest_addr) == rest_addr))
                         qla24xx_write_flash_dword(ha,
-                            flash_conf_to_access_addr(0x0336),
+                            ha->fdt_protect_sec_cmd,
                             (fdata & 0xff00) | ((fdata << 16) &
                             0xff0000) | ((fdata >> 16) & 0xff));
         }