#include "cxgb3i_ddp.h"
-#define DRV_MODULE_NAME "cxgb3i_ddp"
-#define DRV_MODULE_VERSION "1.0.0"
-#define DRV_MODULE_RELDATE "Dec. 1, 2008"
-
-static char version[] =
- "Chelsio S3xx iSCSI DDP " DRV_MODULE_NAME
- " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
-
-MODULE_AUTHOR("Karen Xie <kxie@chelsio.com>");
-MODULE_DESCRIPTION("cxgb3i ddp pagepod manager");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(DRV_MODULE_VERSION);
-
#define ddp_log_error(fmt...) printk(KERN_ERR "cxgb3i_ddp: ERR! " fmt)
#define ddp_log_warn(fmt...) printk(KERN_WARNING "cxgb3i_ddp: WARN! " fmt)
#define ddp_log_info(fmt...) printk(KERN_INFO "cxgb3i_ddp: " fmt)
static unsigned char ddp_page_shift[DDP_PGIDX_MAX] = {12, 13, 14, 16};
static unsigned char page_idx = DDP_PGIDX_MAX;
-static LIST_HEAD(cxgb3i_ddp_list);
-static DEFINE_RWLOCK(cxgb3i_ddp_rwlock);
-
/*
* functions to program the pagepod in h/w
*/
return 0;
}
-static int clear_ddp_map(struct cxgb3i_ddp_info *ddp, unsigned int idx,
- unsigned int npods)
+static void clear_ddp_map(struct cxgb3i_ddp_info *ddp, unsigned int tag,
+ unsigned int idx, unsigned int npods)
{
unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit;
int i;
for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) {
struct sk_buff *skb = ddp->gl_skb[idx];
+ if (!skb) {
+ ddp_log_error("ddp tag 0x%x, 0x%x, %d/%u, skb NULL.\n",
+ tag, idx, i, npods);
+ continue;
+ }
ddp->gl_skb[idx] = NULL;
memset((skb->head + sizeof(struct ulp_mem_io)), 0, PPOD_SIZE);
ulp_mem_io_set_hdr(skb, pm_addr);
skb->priority = CPL_PRIORITY_CONTROL;
cxgb3_ofld_send(ddp->tdev, skb);
}
- return 0;
}
static inline int ddp_find_unused_entries(struct cxgb3i_ddp_info *ddp,
- int start, int max, int count,
+ unsigned int start, unsigned int max,
+ unsigned int count,
struct cxgb3i_gather_list *gl)
{
- unsigned int i, j;
+ unsigned int i, j, k;
+
+ /* not enough entries */
+ if ((max - start) < count)
+ return -EBUSY;
+ max -= count;
spin_lock(&ddp->map_lock);
- for (i = start; i <= max;) {
- for (j = 0; j < count; j++) {
- if (ddp->gl_map[i + j])
+ for (i = start; i < max;) {
+ for (j = 0, k = i; j < count; j++, k++) {
+ if (ddp->gl_map[k])
break;
}
if (j == count) {
- for (j = 0; j < count; j++)
- ddp->gl_map[i + j] = gl;
+ for (j = 0, k = i; j < count; j++, k++)
+ ddp->gl_map[k] = gl;
spin_unlock(&ddp->map_lock);
return i;
}
ddp_log_debug("ddp page size 0x%lx not supported.\n", pgsz);
return DDP_PGIDX_MAX;
}
-EXPORT_SYMBOL_GPL(cxgb3i_ddp_find_page_index);
static inline void ddp_gl_unmap(struct pci_dev *pdev,
struct cxgb3i_gather_list *gl)
kfree(gl);
return NULL;
}
-EXPORT_SYMBOL_GPL(cxgb3i_ddp_make_gl);
/**
* cxgb3i_ddp_release_gl - release a page buffer list
ddp_gl_unmap(pdev, gl);
kfree(gl);
}
-EXPORT_SYMBOL_GPL(cxgb3i_ddp_release_gl);
/**
* cxgb3i_ddp_tag_reserve - set up ddp for a data transfer
struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi;
struct pagepod_hdr hdr;
unsigned int npods;
- int idx = -1, idx_max;
+ int idx = -1;
int err = -ENOMEM;
u32 sw_tag = *tagp;
u32 tag;
}
npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
- idx_max = ddp->nppods - npods + 1;
if (ddp->idx_last == ddp->nppods)
- idx = ddp_find_unused_entries(ddp, 0, idx_max, npods, gl);
+ idx = ddp_find_unused_entries(ddp, 0, ddp->nppods, npods, gl);
else {
idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1,
- idx_max, npods, gl);
- if (idx < 0 && ddp->idx_last >= npods)
+ ddp->nppods, npods, gl);
+ if (idx < 0 && ddp->idx_last >= npods) {
idx = ddp_find_unused_entries(ddp, 0,
- ddp->idx_last - npods + 1,
+ min(ddp->idx_last + npods, ddp->nppods),
npods, gl);
+ }
}
if (idx < 0) {
ddp_log_debug("xferlen %u, gl %u, npods %u NO DDP.\n",
ddp_unmark_entries(ddp, idx, npods);
return err;
}
-EXPORT_SYMBOL_GPL(cxgb3i_ddp_tag_reserve);
/**
* cxgb3i_ddp_tag_release - release a ddp tag
struct cxgb3i_gather_list *gl = ddp->gl_map[idx];
unsigned int npods;
- if (!gl) {
- ddp_log_error("release ddp 0x%x, idx 0x%x, gl NULL.\n",
- tag, idx);
+ if (!gl || !gl->nelem) {
+ ddp_log_error("release 0x%x, idx 0x%x, gl 0x%p, %u.\n",
+ tag, idx, gl, gl ? gl->nelem : 0);
return;
}
npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT;
ddp_log_debug("ddp tag 0x%x, release idx 0x%x, npods %u.\n",
tag, idx, npods);
- clear_ddp_map(ddp, idx, npods);
+ clear_ddp_map(ddp, tag, idx, npods);
ddp_unmark_entries(ddp, idx, npods);
cxgb3i_ddp_release_gl(gl, ddp->pdev);
} else
ddp_log_error("ddp tag 0x%x, idx 0x%x > max 0x%x.\n",
tag, idx, ddp->nppods);
}
-EXPORT_SYMBOL_GPL(cxgb3i_ddp_tag_release);
static int setup_conn_pgidx(struct t3cdev *tdev, unsigned int tid, int pg_idx,
int reply)
{
return setup_conn_pgidx(tdev, tid, page_idx, reply);
}
-EXPORT_SYMBOL_GPL(cxgb3i_setup_conn_host_pagesize);
/**
* cxgb3i_setup_conn_pagesize - setup the conn.'s ddp page size
return setup_conn_pgidx(tdev, tid, pgidx, reply);
}
-EXPORT_SYMBOL_GPL(cxgb3i_setup_conn_pagesize);
/**
* cxgb3i_setup_conn_digest - setup conn. digest setting
cxgb3_ofld_send(tdev, skb);
return 0;
}
-EXPORT_SYMBOL_GPL(cxgb3i_setup_conn_digest);
-static int ddp_init(struct t3cdev *tdev)
+
+/**
+ * cxgb3i_adapter_ddp_info - read the adapter's ddp information
+ * @tdev: t3cdev adapter
+ * @tformat: tag format
+ * @txsz: max tx pdu payload size, filled in by this func.
+ * @rxsz: max rx pdu payload size, filled in by this func.
+ * setup the tag format for a given iscsi entity
+ */
+int cxgb3i_adapter_ddp_info(struct t3cdev *tdev,
+ struct cxgb3i_tag_format *tformat,
+ unsigned int *txsz, unsigned int *rxsz)
+{
+ struct cxgb3i_ddp_info *ddp;
+ unsigned char idx_bits;
+
+ if (!tformat)
+ return -EINVAL;
+
+ if (!tdev->ulp_iscsi)
+ return -EINVAL;
+
+ ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi;
+
+ idx_bits = 32 - tformat->sw_bits;
+ tformat->rsvd_bits = ddp->idx_bits;
+ tformat->rsvd_shift = PPOD_IDX_SHIFT;
+ tformat->rsvd_mask = (1 << tformat->rsvd_bits) - 1;
+
+ ddp_log_info("tag format: sw %u, rsvd %u,%u, mask 0x%x.\n",
+ tformat->sw_bits, tformat->rsvd_bits,
+ tformat->rsvd_shift, tformat->rsvd_mask);
+
+ *txsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
+ ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN);
+ *rxsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
+ ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN);
+ ddp_log_info("max payload size: %u/%u, %u/%u.\n",
+ *txsz, ddp->max_txsz, *rxsz, ddp->max_rxsz);
+ return 0;
+}
+
+/**
+ * cxgb3i_ddp_cleanup - release the cxgb3 adapter's ddp resource
+ * @tdev: t3cdev adapter
+ * release all the resource held by the ddp pagepod manager for a given
+ * adapter if needed
+ */
+void cxgb3i_ddp_cleanup(struct t3cdev *tdev)
+{
+ int i = 0;
+ struct cxgb3i_ddp_info *ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi;
+
+ ddp_log_info("t3dev 0x%p, release ddp 0x%p.\n", tdev, ddp);
+
+ if (ddp) {
+ tdev->ulp_iscsi = NULL;
+ while (i < ddp->nppods) {
+ struct cxgb3i_gather_list *gl = ddp->gl_map[i];
+ if (gl) {
+ int npods = (gl->nelem + PPOD_PAGES_MAX - 1)
+ >> PPOD_PAGES_SHIFT;
+ ddp_log_info("t3dev 0x%p, ddp %d + %d.\n",
+ tdev, i, npods);
+ kfree(gl);
+ ddp_free_gl_skb(ddp, i, npods);
+ i += npods;
+ } else
+ i++;
+ }
+ cxgb3i_free_big_mem(ddp);
+ }
+}
+
+/**
+ * ddp_init - initialize the cxgb3 adapter's ddp resource
+ * @tdev: t3cdev adapter
+ * initialize the ddp pagepod manager for a given adapter
+ */
+static void ddp_init(struct t3cdev *tdev)
{
struct cxgb3i_ddp_info *ddp;
struct ulp_iscsi_info uinfo;
unsigned int ppmax, bits;
int i, err;
- static int vers_printed;
- if (!vers_printed) {
- printk(KERN_INFO "%s", version);
- vers_printed = 1;
+ if (tdev->ulp_iscsi) {
+ ddp_log_warn("t3dev 0x%p, ddp 0x%p already set up.\n",
+ tdev, tdev->ulp_iscsi);
+ return;
}
err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo);
if (err < 0) {
ddp_log_error("%s, failed to get iscsi param err=%d.\n",
tdev->name, err);
- return err;
+ return;
}
ppmax = (uinfo.ulimit - uinfo.llimit + 1) >> PPOD_SIZE_SHIFT;
if (!ddp) {
ddp_log_warn("%s unable to alloc ddp 0x%d, ddp disabled.\n",
tdev->name, ppmax);
- return 0;
+ return;
}
ddp->gl_map = (struct cxgb3i_gather_list **)(ddp + 1);
ddp->gl_skb = (struct sk_buff **)(((char *)ddp->gl_map) +
tdev->ulp_iscsi = ddp;
- /* add to the list */
- write_lock(&cxgb3i_ddp_rwlock);
- list_add_tail(&ddp->list, &cxgb3i_ddp_list);
- write_unlock(&cxgb3i_ddp_rwlock);
-
- ddp_log_info("nppods %u (0x%x ~ 0x%x), bits %u, mask 0x%x,0x%x "
- "pkt %u/%u, %u/%u.\n",
- ppmax, ddp->llimit, ddp->ulimit, ddp->idx_bits,
- ddp->idx_mask, ddp->rsvd_tag_mask,
- ddp->max_txsz, uinfo.max_txsz,
+ ddp_log_info("tdev 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u,"
+ " %u/%u.\n",
+ tdev, ppmax, ddp->idx_bits, ddp->idx_mask,
+ ddp->rsvd_tag_mask, ddp->max_txsz, uinfo.max_txsz,
ddp->max_rxsz, uinfo.max_rxsz);
- return 0;
+ return;
free_ddp_map:
cxgb3i_free_big_mem(ddp);
- return err;
-}
-
-/**
- * cxgb3i_adapter_ddp_init - initialize the adapter's ddp resource
- * @tdev: t3cdev adapter
- * @tformat: tag format
- * @txsz: max tx pdu payload size, filled in by this func.
- * @rxsz: max rx pdu payload size, filled in by this func.
- * initialize the ddp pagepod manager for a given adapter if needed and
- * setup the tag format for a given iscsi entity
- */
-int cxgb3i_adapter_ddp_init(struct t3cdev *tdev,
- struct cxgb3i_tag_format *tformat,
- unsigned int *txsz, unsigned int *rxsz)
-{
- struct cxgb3i_ddp_info *ddp;
- unsigned char idx_bits;
-
- if (!tformat)
- return -EINVAL;
-
- if (!tdev->ulp_iscsi) {
- int err = ddp_init(tdev);
- if (err < 0)
- return err;
- }
- ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi;
-
- idx_bits = 32 - tformat->sw_bits;
- tformat->rsvd_bits = ddp->idx_bits;
- tformat->rsvd_shift = PPOD_IDX_SHIFT;
- tformat->rsvd_mask = (1 << tformat->rsvd_bits) - 1;
-
- ddp_log_info("tag format: sw %u, rsvd %u,%u, mask 0x%x.\n",
- tformat->sw_bits, tformat->rsvd_bits,
- tformat->rsvd_shift, tformat->rsvd_mask);
-
- *txsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
- ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN);
- *rxsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD,
- ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN);
- ddp_log_info("max payload size: %u/%u, %u/%u.\n",
- *txsz, ddp->max_txsz, *rxsz, ddp->max_rxsz);
- return 0;
-}
-EXPORT_SYMBOL_GPL(cxgb3i_adapter_ddp_init);
-
-static void ddp_release(struct cxgb3i_ddp_info *ddp)
-{
- int i = 0;
- struct t3cdev *tdev = ddp->tdev;
-
- tdev->ulp_iscsi = NULL;
- while (i < ddp->nppods) {
- struct cxgb3i_gather_list *gl = ddp->gl_map[i];
- if (gl) {
- int npods = (gl->nelem + PPOD_PAGES_MAX - 1)
- >> PPOD_PAGES_SHIFT;
-
- kfree(gl);
- ddp_free_gl_skb(ddp, i, npods);
- } else
- i++;
- }
- cxgb3i_free_big_mem(ddp);
}
/**
- * cxgb3i_adapter_ddp_cleanup - release the adapter's ddp resource
- * @tdev: t3cdev adapter
- * release all the resource held by the ddp pagepod manager for a given
- * adapter if needed
+ * cxgb3i_ddp_init - initialize ddp functions
*/
-void cxgb3i_adapter_ddp_cleanup(struct t3cdev *tdev)
+void cxgb3i_ddp_init(struct t3cdev *tdev)
{
- struct cxgb3i_ddp_info *ddp;
-
- /* remove from the list */
- write_lock(&cxgb3i_ddp_rwlock);
- list_for_each_entry(ddp, &cxgb3i_ddp_list, list) {
- if (ddp->tdev == tdev) {
- list_del(&ddp->list);
- break;
- }
+ if (page_idx == DDP_PGIDX_MAX) {
+ page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE);
+ ddp_log_info("system PAGE_SIZE %lu, ddp idx %u.\n",
+ PAGE_SIZE, page_idx);
}
- write_unlock(&cxgb3i_ddp_rwlock);
-
- if (ddp)
- ddp_release(ddp);
-}
-EXPORT_SYMBOL_GPL(cxgb3i_adapter_ddp_cleanup);
-
-/**
- * cxgb3i_ddp_init_module - module init entry point
- * initialize any driver wide global data structures
- */
-static int __init cxgb3i_ddp_init_module(void)
-{
- page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE);
- ddp_log_info("system PAGE_SIZE %lu, ddp idx %u.\n",
- PAGE_SIZE, page_idx);
- return 0;
-}
-
-/**
- * cxgb3i_ddp_exit_module - module cleanup/exit entry point
- * go through the ddp list and release any resource held.
- */
-static void __exit cxgb3i_ddp_exit_module(void)
-{
- struct cxgb3i_ddp_info *ddp;
-
- /* release all ddp manager if there is any */
- write_lock(&cxgb3i_ddp_rwlock);
- list_for_each_entry(ddp, &cxgb3i_ddp_list, list) {
- list_del(&ddp->list);
- ddp_release(ddp);
- }
- write_unlock(&cxgb3i_ddp_rwlock);
+ ddp_init(tdev);
}
-
-module_init(cxgb3i_ddp_init_module);
-module_exit(cxgb3i_ddp_exit_module);
git.samba.org / sfrench / cifs-2.6.git / blobdiff