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authorJens Axboe <jens.axboe@oracle.com>2007-05-09 07:02:43 -0400
committerJens Axboe <jens.axboe@oracle.com>2007-10-16 05:14:18 -0400
commita0441891373fe2db582075a4639fdfcccea470c1 (patch)
tree3455f63574e8053875e73611c87e6582970a3276 /drivers/scsi/qla1280.c
parentb0f655d0ef02468232b69acad1d935db921db46b (diff)
qla1280: sg chaining support
Interesting hardware setup... Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/scsi/qla1280.c')
-rw-r--r--drivers/scsi/qla1280.c66
1 files changed, 37 insertions, 29 deletions
diff --git a/drivers/scsi/qla1280.c b/drivers/scsi/qla1280.c
index fba8aa8a81b5..1f17dec7d6fc 100644
--- a/drivers/scsi/qla1280.c
+++ b/drivers/scsi/qla1280.c
@@ -2775,7 +2775,7 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
2775 struct device_reg __iomem *reg = ha->iobase; 2775 struct device_reg __iomem *reg = ha->iobase;
2776 struct scsi_cmnd *cmd = sp->cmd; 2776 struct scsi_cmnd *cmd = sp->cmd;
2777 cmd_a64_entry_t *pkt; 2777 cmd_a64_entry_t *pkt;
2778 struct scatterlist *sg = NULL; 2778 struct scatterlist *sg = NULL, *s;
2779 __le32 *dword_ptr; 2779 __le32 *dword_ptr;
2780 dma_addr_t dma_handle; 2780 dma_addr_t dma_handle;
2781 int status = 0; 2781 int status = 0;
@@ -2889,13 +2889,16 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
2889 * Load data segments. 2889 * Load data segments.
2890 */ 2890 */
2891 if (seg_cnt) { /* If data transfer. */ 2891 if (seg_cnt) { /* If data transfer. */
2892 int remseg = seg_cnt;
2892 /* Setup packet address segment pointer. */ 2893 /* Setup packet address segment pointer. */
2893 dword_ptr = (u32 *)&pkt->dseg_0_address; 2894 dword_ptr = (u32 *)&pkt->dseg_0_address;
2894 2895
2895 if (cmd->use_sg) { /* If scatter gather */ 2896 if (cmd->use_sg) { /* If scatter gather */
2896 /* Load command entry data segments. */ 2897 /* Load command entry data segments. */
2897 for (cnt = 0; cnt < 2 && seg_cnt; cnt++, seg_cnt--) { 2898 for_each_sg(sg, s, seg_cnt, cnt) {
2898 dma_handle = sg_dma_address(sg); 2899 if (cnt == 2)
2900 break;
2901 dma_handle = sg_dma_address(s);
2899#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2) 2902#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
2900 if (ha->flags.use_pci_vchannel) 2903 if (ha->flags.use_pci_vchannel)
2901 sn_pci_set_vchan(ha->pdev, 2904 sn_pci_set_vchan(ha->pdev,
@@ -2906,12 +2909,12 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
2906 cpu_to_le32(pci_dma_lo32(dma_handle)); 2909 cpu_to_le32(pci_dma_lo32(dma_handle));
2907 *dword_ptr++ = 2910 *dword_ptr++ =
2908 cpu_to_le32(pci_dma_hi32(dma_handle)); 2911 cpu_to_le32(pci_dma_hi32(dma_handle));
2909 *dword_ptr++ = cpu_to_le32(sg_dma_len(sg)); 2912 *dword_ptr++ = cpu_to_le32(sg_dma_len(s));
2910 sg++;
2911 dprintk(3, "S/G Segment phys_addr=%x %x, len=0x%x\n", 2913 dprintk(3, "S/G Segment phys_addr=%x %x, len=0x%x\n",
2912 cpu_to_le32(pci_dma_hi32(dma_handle)), 2914 cpu_to_le32(pci_dma_hi32(dma_handle)),
2913 cpu_to_le32(pci_dma_lo32(dma_handle)), 2915 cpu_to_le32(pci_dma_lo32(dma_handle)),
2914 cpu_to_le32(sg_dma_len(sg))); 2916 cpu_to_le32(sg_dma_len(sg_next(s))));
2917 remseg--;
2915 } 2918 }
2916 dprintk(5, "qla1280_64bit_start_scsi: Scatter/gather " 2919 dprintk(5, "qla1280_64bit_start_scsi: Scatter/gather "
2917 "command packet data - b %i, t %i, l %i \n", 2920 "command packet data - b %i, t %i, l %i \n",
@@ -2926,7 +2929,9 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
2926 dprintk(3, "S/G Building Continuation...seg_cnt=0x%x " 2929 dprintk(3, "S/G Building Continuation...seg_cnt=0x%x "
2927 "remains\n", seg_cnt); 2930 "remains\n", seg_cnt);
2928 2931
2929 while (seg_cnt > 0) { 2932 while (remseg > 0) {
2933 /* Update sg start */
2934 sg = s;
2930 /* Adjust ring index. */ 2935 /* Adjust ring index. */
2931 ha->req_ring_index++; 2936 ha->req_ring_index++;
2932 if (ha->req_ring_index == REQUEST_ENTRY_CNT) { 2937 if (ha->req_ring_index == REQUEST_ENTRY_CNT) {
@@ -2952,9 +2957,10 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
2952 (u32 *)&((struct cont_a64_entry *) pkt)->dseg_0_address; 2957 (u32 *)&((struct cont_a64_entry *) pkt)->dseg_0_address;
2953 2958
2954 /* Load continuation entry data segments. */ 2959 /* Load continuation entry data segments. */
2955 for (cnt = 0; cnt < 5 && seg_cnt; 2960 for_each_sg(sg, s, remseg, cnt) {
2956 cnt++, seg_cnt--) { 2961 if (cnt == 5)
2957 dma_handle = sg_dma_address(sg); 2962 break;
2963 dma_handle = sg_dma_address(s);
2958#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2) 2964#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
2959 if (ha->flags.use_pci_vchannel) 2965 if (ha->flags.use_pci_vchannel)
2960 sn_pci_set_vchan(ha->pdev, 2966 sn_pci_set_vchan(ha->pdev,
@@ -2966,12 +2972,12 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
2966 *dword_ptr++ = 2972 *dword_ptr++ =
2967 cpu_to_le32(pci_dma_hi32(dma_handle)); 2973 cpu_to_le32(pci_dma_hi32(dma_handle));
2968 *dword_ptr++ = 2974 *dword_ptr++ =
2969 cpu_to_le32(sg_dma_len(sg)); 2975 cpu_to_le32(sg_dma_len(s));
2970 dprintk(3, "S/G Segment Cont. phys_addr=%x %x, len=0x%x\n", 2976 dprintk(3, "S/G Segment Cont. phys_addr=%x %x, len=0x%x\n",
2971 cpu_to_le32(pci_dma_hi32(dma_handle)), 2977 cpu_to_le32(pci_dma_hi32(dma_handle)),
2972 cpu_to_le32(pci_dma_lo32(dma_handle)), 2978 cpu_to_le32(pci_dma_lo32(dma_handle)),
2973 cpu_to_le32(sg_dma_len(sg))); 2979 cpu_to_le32(sg_dma_len(s)));
2974 sg++; 2980 remseg--;
2975 } 2981 }
2976 dprintk(5, "qla1280_64bit_start_scsi: " 2982 dprintk(5, "qla1280_64bit_start_scsi: "
2977 "continuation packet data - b %i, t " 2983 "continuation packet data - b %i, t "
@@ -3062,7 +3068,7 @@ qla1280_32bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
3062 struct device_reg __iomem *reg = ha->iobase; 3068 struct device_reg __iomem *reg = ha->iobase;
3063 struct scsi_cmnd *cmd = sp->cmd; 3069 struct scsi_cmnd *cmd = sp->cmd;
3064 struct cmd_entry *pkt; 3070 struct cmd_entry *pkt;
3065 struct scatterlist *sg = NULL; 3071 struct scatterlist *sg = NULL, *s;
3066 __le32 *dword_ptr; 3072 __le32 *dword_ptr;
3067 int status = 0; 3073 int status = 0;
3068 int cnt; 3074 int cnt;
@@ -3188,6 +3194,7 @@ qla1280_32bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
3188 * Load data segments. 3194 * Load data segments.
3189 */ 3195 */
3190 if (seg_cnt) { 3196 if (seg_cnt) {
3197 int remseg = seg_cnt;
3191 /* Setup packet address segment pointer. */ 3198 /* Setup packet address segment pointer. */
3192 dword_ptr = &pkt->dseg_0_address; 3199 dword_ptr = &pkt->dseg_0_address;
3193 3200
@@ -3196,22 +3203,25 @@ qla1280_32bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
3196 qla1280_dump_buffer(1, (char *)sg, 4 * 16); 3203 qla1280_dump_buffer(1, (char *)sg, 4 * 16);
3197 3204
3198 /* Load command entry data segments. */ 3205 /* Load command entry data segments. */
3199 for (cnt = 0; cnt < 4 && seg_cnt; cnt++, seg_cnt--) { 3206 for_each_sg(sg, s, seg_cnt, cnt) {
3207 if (cnt == 4)
3208 break;
3200 *dword_ptr++ = 3209 *dword_ptr++ =
3201 cpu_to_le32(pci_dma_lo32(sg_dma_address(sg))); 3210 cpu_to_le32(pci_dma_lo32(sg_dma_address(s)));
3202 *dword_ptr++ = 3211 *dword_ptr++ = cpu_to_le32(sg_dma_len(s));
3203 cpu_to_le32(sg_dma_len(sg));
3204 dprintk(3, "S/G Segment phys_addr=0x%lx, len=0x%x\n", 3212 dprintk(3, "S/G Segment phys_addr=0x%lx, len=0x%x\n",
3205 (pci_dma_lo32(sg_dma_address(sg))), 3213 (pci_dma_lo32(sg_dma_address(s))),
3206 (sg_dma_len(sg))); 3214 (sg_dma_len(s)));
3207 sg++; 3215 remseg--;
3208 } 3216 }
3209 /* 3217 /*
3210 * Build continuation packets. 3218 * Build continuation packets.
3211 */ 3219 */
3212 dprintk(3, "S/G Building Continuation" 3220 dprintk(3, "S/G Building Continuation"
3213 "...seg_cnt=0x%x remains\n", seg_cnt); 3221 "...seg_cnt=0x%x remains\n", seg_cnt);
3214 while (seg_cnt > 0) { 3222 while (remseg > 0) {
3223 /* Continue from end point */
3224 sg = s;
3215 /* Adjust ring index. */ 3225 /* Adjust ring index. */
3216 ha->req_ring_index++; 3226 ha->req_ring_index++;
3217 if (ha->req_ring_index == REQUEST_ENTRY_CNT) { 3227 if (ha->req_ring_index == REQUEST_ENTRY_CNT) {
@@ -3239,18 +3249,16 @@ qla1280_32bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp)
3239 &((struct cont_entry *) pkt)->dseg_0_address; 3249 &((struct cont_entry *) pkt)->dseg_0_address;
3240 3250
3241 /* Load continuation entry data segments. */ 3251 /* Load continuation entry data segments. */
3242 for (cnt = 0; cnt < 7 && seg_cnt; 3252 for_each_sg(sg, s, remseg, cnt) {
3243 cnt++, seg_cnt--) {
3244 *dword_ptr++ = 3253 *dword_ptr++ =
3245 cpu_to_le32(pci_dma_lo32(sg_dma_address(sg))); 3254 cpu_to_le32(pci_dma_lo32(sg_dma_address(s)));
3246 *dword_ptr++ = 3255 *dword_ptr++ =
3247 cpu_to_le32(sg_dma_len(sg)); 3256 cpu_to_le32(sg_dma_len(s));
3248 dprintk(1, 3257 dprintk(1,
3249 "S/G Segment Cont. phys_addr=0x%x, " 3258 "S/G Segment Cont. phys_addr=0x%x, "
3250 "len=0x%x\n", 3259 "len=0x%x\n",
3251 cpu_to_le32(pci_dma_lo32(sg_dma_address(sg))), 3260 cpu_to_le32(pci_dma_lo32(sg_dma_address(s))),
3252 cpu_to_le32(sg_dma_len(sg))); 3261 cpu_to_le32(sg_dma_len(s)));
3253 sg++;
3254 } 3262 }
3255 dprintk(5, "qla1280_32bit_start_scsi: " 3263 dprintk(5, "qla1280_32bit_start_scsi: "
3256 "continuation packet data - " 3264 "continuation packet data - "
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-08 20:34:11 -0500